/* roulang page: index */
:root {
            --color-primary: #1E5B8F;
            --color-primary-dark: #16476E;
            --color-primary-light: #3A8BC2;
            --color-accent: #3A8BC2;
            --color-bg: #F7F9FB;
            --color-surface: #FFFFFF;
            --color-border: #E1E7EC;
            --color-border-light: #E8EEF3;
            --color-text-heading: #1A2B3C;
            --color-text-body: #2F3E4E;
            --color-text-muted: #6B7A8C;
            --color-text-white: #FFFFFF;
            --color-overlay-dark: rgba(26, 43, 60, 0.78);
            --color-bg-blue-tint: rgba(30, 91, 143, 0.06);
            --color-bg-blue-tint-strong: rgba(30, 91, 143, 0.12);
            --radius-sm: 8px;
            --radius-md: 12px;
            --radius-lg: 16px;
            --shadow-sm: 0 2px 8px rgba(26, 43, 60, 0.06);
            --shadow-md: 0 4px 14px rgba(26, 43, 60, 0.08);
            --shadow-lg: 0 6px 18px rgba(26, 43, 60, 0.12);
            --shadow-xl: 0 10px 28px rgba(26, 43, 60, 0.16);
            --font-family: "PingFang SC", "Microsoft YaHei", "Noto Sans SC", "Hiragino Sans GB", sans-serif;
            --max-width: 1200px;
            --spacing-sm: 12px;
            --spacing-md: 20px;
            --spacing-lg: 32px;
            --spacing-xl: 48px;
            --spacing-2xl: 72px;
            --spacing-3xl: 96px;
            --transition-fast: 0.2s ease;
            --transition-base: 0.3s ease;
            --transition-slow: 0.4s ease;
        }

        *,
        *::before,
        *::after {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
        }

        html {
            scroll-behavior: smooth;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
        }

        body {
            font-family: var(--font-family);
            font-size: 16px;
            line-height: 1.8;
            color: var(--color-text-body);
            background-color: var(--color-bg);
            min-height: 100vh;
        }

        img {
            max-width: 100%;
            height: auto;
            display: block;
        }

        a {
            color: var(--color-primary);
            text-decoration: none;
            transition: color var(--transition-fast);
        }
        a:hover {
            color: var(--color-primary-dark);
        }

        button,
        input {
            font-family: inherit;
            font-size: inherit;
            border: none;
            outline: none;
            background: none;
        }

        button {
            cursor: pointer;
        }

        ul,
        ol {
            list-style: none;
        }

        .container {
            max-width: var(--max-width);
            margin: 0 auto;
            padding: 0 var(--spacing-md);
        }

        .section {
            padding: var(--spacing-2xl) 0;
        }

        .section-heading {
            margin-bottom: var(--spacing-lg);
        }
        .section-heading h2 {
            font-size: 28px;
            font-weight: 700;
            color: var(--color-text-heading);
            letter-spacing: 0.5px;
            position: relative;
            padding-bottom: var(--spacing-sm);
            display: inline-block;
            margin-bottom: 8px;
        }
        .section-heading h2::after {
            content: "";
            position: absolute;
            bottom: 0;
            left: 0;
            width: 48px;
            height: 3px;
            background: var(--color-primary);
            border-radius: 2px;
        }
        .section-heading .section-sub {
            font-size: 15px;
            color: var(--color-text-muted);
            max-width: 680px;
            line-height: 1.9;
        }

        .sr-only {
            position: absolute;
            width: 1px;
            height: 1px;
            padding: 0;
            margin: -1px;
            overflow: hidden;
            clip: rect(0, 0, 0, 0);
            white-space: nowrap;
            border: 0;
        }

        /* ===== Header / Navigation ===== */
        .site-header {
            position: sticky;
            top: 0;
            z-index: 100;
            background: var(--color-surface);
            box-shadow: var(--shadow-sm);
            border-bottom: 1px solid var(--color-border-light);
            padding: 0;
        }
        .site-header .container {
            display: flex;
            align-items: center;
            justify-content: space-between;
            min-height: 72px;
            padding-top: 10px;
            padding-bottom: 10px;
            gap: var(--spacing-md);
        }
        .brand {
            display: flex;
            align-items: center;
            gap: 10px;
            flex-shrink: 0;
        }
        .brand-logo-mark {
            width: 40px;
            height: 40px;
            border-radius: var(--radius-sm);
            background: var(--color-primary);
            color: var(--color-text-white);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 20px;
            font-weight: 700;
            letter-spacing: 0;
            flex-shrink: 0;
        }
        .brand-name {
            font-size: 20px;
            font-weight: 700;
            color: var(--color-text-heading);
            letter-spacing: 0.5px;
            white-space: nowrap;
        }

        .nav-main {
            display: flex;
            align-items: center;
            gap: 8px;
            flex-wrap: nowrap;
            overflow-x: auto;
            scrollbar-width: thin;
            scrollbar-color: var(--color-border) transparent;
            -webkit-overflow-scrolling: touch;
        }
        .nav-main::-webkit-scrollbar {
            height: 4px;
        }
        .nav-main::-webkit-scrollbar-thumb {
            background: var(--color-border);
            border-radius: 2px;
        }
        .nav-card-item {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            padding: 8px 14px;
            border-radius: var(--radius-sm);
            background: var(--color-bg);
            border: 1px solid var(--color-border-light);
            font-size: 14px;
            font-weight: 500;
            color: var(--color-text-body);
            white-space: nowrap;
            transition: all var(--transition-fast);
        }
        .nav-card-item:hover {
            background: var(--color-bg-blue-tint);
            border-color: var(--color-primary-light);
            color: var(--color-primary);
        }
        .nav-card-item.active {
            background: var(--color-primary);
            border-color: var(--color-primary);
            color: var(--color-text-white);
        }
        .nav-card-item .nav-icon {
            font-size: 16px;
            line-height: 1;
        }

        .nav-actions {
            display: flex;
            align-items: center;
            gap: 8px;
            flex-shrink: 0;
        }
        .nav-cta {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            padding: 9px 18px;
            border-radius: var(--radius-sm);
            font-size: 14px;
            font-weight: 600;
            transition: all var(--transition-fast);
            white-space: nowrap;
        }
        .nav-cta-primary {
            background: var(--color-primary);
            color: var(--color-text-white);
        }
        .nav-cta-primary:hover {
            background: var(--color-primary-dark);
            color: var(--color-text-white);
            box-shadow: var(--shadow-md);
        }
        .nav-cta-secondary {
            background: var(--color-surface);
            color: var(--color-primary);
            border: 1px solid var(--color-primary);
        }
        .nav-cta-secondary:hover {
            background: var(--color-bg-blue-tint);
            color: var(--color-primary-dark);
        }

        .hamburger {
            display: none;
            flex-direction: column;
            gap: 5px;
            padding: 8px;
            border-radius: var(--radius-sm);
            border: 1px solid var(--color-border);
            background: var(--color-surface);
            cursor: pointer;
            transition: all var(--transition-fast);
        }
        .hamburger span {
            display: block;
            width: 22px;
            height: 2px;
            background: var(--color-text-heading);
            border-radius: 2px;
            transition: all var(--transition-fast);
        }
        .hamburger:hover {
            background: var(--color-bg-blue-tint);
            border-color: var(--color-primary-light);
        }

        .mobile-drawer {
            display: none;
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            bottom: 0;
            background: rgba(26, 43, 60, 0.5);
            z-index: 200;
            opacity: 0;
            visibility: hidden;
            transition: all var(--transition-base);
        }
        .mobile-drawer.open {
            opacity: 1;
            visibility: visible;
        }
        .mobile-drawer-panel {
            position: absolute;
            top: 0;
            right: 0;
            bottom: 0;
            width: 300px;
            max-width: 85vw;
            background: var(--color-surface);
            padding: var(--spacing-lg);
            display: flex;
            flex-direction: column;
            gap: var(--spacing-md);
            transform: translateX(100%);
            transition: transform var(--transition-base);
            overflow-y: auto;
            box-shadow: var(--shadow-xl);
        }
        .mobile-drawer.open .mobile-drawer-panel {
            transform: translateX(0);
        }
        .mobile-drawer-header {
            display: flex;
            align-items: center;
            justify-content: space-between;
            margin-bottom: var(--spacing-md);
        }
        .mobile-drawer-close {
            font-size: 24px;
            padding: 4px 10px;
            border-radius: var(--radius-sm);
            background: var(--color-bg);
            border: 1px solid var(--color-border);
            cursor: pointer;
            color: var(--color-text-body);
            transition: all var(--transition-fast);
        }
        .mobile-drawer-close:hover {
            background: var(--color-bg-blue-tint);
        }
        .mobile-drawer .nav-card-item {
            display: flex;
            width: 100%;
            padding: 12px 16px;
            font-size: 15px;
            margin-bottom: 6px;
        }
        .mobile-drawer .nav-actions {
            margin-top: auto;
            flex-direction: column;
            width: 100%;
        }
        .mobile-drawer .nav-cta {
            width: 100%;
            justify-content: center;
        }

        /* ===== Hero ===== */
        .hero {
            position: relative;
            background: var(--color-overlay-dark);
            background-image: linear-gradient(135deg, var(--color-overlay-dark) 0%, rgba(22, 71, 110, 0.88) 60%, rgba(26, 43, 60, 0.82) 100%),
                url('/assets/images/backpic/back-1.webp');
            background-size: cover;
            background-position: center;
            padding: var(--spacing-3xl) 0;
            color: var(--color-text-white);
            min-height: 520px;
            display: flex;
            align-items: center;
        }
        .hero .container {
            display: grid;
            grid-template-columns: 1.2fr 0.8fr;
            gap: var(--spacing-xl);
            align-items: center;
            width: 100%;
        }
        .hero-content {
            padding: var(--spacing-lg) 0;
        }
        .hero-eyebrow {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            background: rgba(255, 255, 255, 0.14);
            backdrop-filter: blur(8px);
            -webkit-backdrop-filter: blur(8px);
            padding: 6px 16px;
            border-radius: 999px;
            font-size: 13px;
            font-weight: 500;
            letter-spacing: 0.5px;
            margin-bottom: var(--spacing-md);
            border: 1px solid rgba(255, 255, 255, 0.2);
        }
        .hero-eyebrow .dot {
            width: 6px;
            height: 6px;
            border-radius: 50%;
            background: #6FCF97;
        }
        .hero h1 {
            font-size: 42px;
            font-weight: 700;
            line-height: 1.25;
            letter-spacing: 0.5px;
            margin-bottom: var(--spacing-sm);
            color: var(--color-text-white);
        }
        .hero h1 .accent {
            color: #77B8E3;
        }
        .hero-desc {
            font-size: 16px;
            line-height: 1.9;
            color: rgba(255, 255, 255, 0.85);
            margin-bottom: var(--spacing-lg);
            max-width: 560px;
        }
        .hero-actions {
            display: flex;
            flex-wrap: wrap;
            gap: var(--spacing-sm);
            margin-bottom: var(--spacing-md);
        }
        .btn {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 12px 24px;
            border-radius: var(--radius-sm);
            font-size: 16px;
            font-weight: 600;
            letter-spacing: 0.3px;
            transition: all var(--transition-fast);
            white-space: nowrap;
            border: 1px solid transparent;
        }
        .btn:focus-visible {
            outline: 2px solid rgba(58, 139, 194, 0.4);
            outline-offset: 2px;
        }
        .btn-primary {
            background: var(--color-primary);
            color: var(--color-text-white);
        }
        .btn-primary:hover {
            background: var(--color-primary-dark);
            color: var(--color-text-white);
            box-shadow: var(--shadow-md);
            transform: translateY(-1px);
        }
        .btn-primary:active {
            transform: translateY(0);
            box-shadow: var(--shadow-sm);
        }
        .btn-outline-light {
            background: transparent;
            color: var(--color-text-white);
            border: 1px solid rgba(255, 255, 255, 0.5);
        }
        .btn-outline-light:hover {
            background: rgba(255, 255, 255, 0.12);
            color: var(--color-text-white);
            border-color: rgba(255, 255, 255, 0.8);
        }
        .btn-outline {
            background: var(--color-surface);
            color: var(--color-primary);
            border: 1px solid var(--color-primary);
        }
        .btn-outline:hover {
            background: var(--color-bg-blue-tint);
            color: var(--color-primary-dark);
            border-color: var(--color-primary-dark);
        }
        .hero-stats-row {
            display: flex;
            flex-wrap: wrap;
            gap: var(--spacing-lg);
            margin-top: var(--spacing-sm);
        }
        .hero-stat {
            display: flex;
            flex-direction: column;
        }
        .hero-stat-number {
            font-size: 24px;
            font-weight: 700;
            color: #77B8E3;
            letter-spacing: 0.5px;
        }
        .hero-stat-label {
            font-size: 13px;
            color: rgba(255, 255, 255, 0.7);
        }

        .hero-panel {
            background: rgba(255, 255, 255, 0.1);
            backdrop-filter: blur(12px);
            -webkit-backdrop-filter: blur(12px);
            border-radius: var(--radius-lg);
            border: 1px solid rgba(255, 255, 255, 0.18);
            padding: var(--spacing-lg);
            box-shadow: var(--shadow-xl);
        }
        .hero-panel-title {
            font-size: 16px;
            font-weight: 600;
            color: var(--color-text-white);
            margin-bottom: var(--spacing-md);
            display: flex;
            align-items: center;
            gap: 8px;
        }
        .hero-panel-list {
            display: flex;
            flex-direction: column;
            gap: 10px;
        }
        .hero-panel-item {
            display: flex;
            align-items: center;
            gap: 12px;
            padding: 10px 12px;
            background: rgba(255, 255, 255, 0.08);
            border-radius: var(--radius-sm);
            transition: all var(--transition-fast);
        }
        .hero-panel-item:hover {
            background: rgba(255, 255, 255, 0.15);
        }
        .hero-panel-rank {
            width: 28px;
            height: 28px;
            flex-shrink: 0;
            border-radius: 50%;
            background: var(--color-primary-light);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 13px;
            font-weight: 700;
            color: var(--color-text-white);
        }
        .hero-panel-info {
            flex: 1;
            min-width: 0;
        }
        .hero-panel-name {
            font-size: 14px;
            font-weight: 600;
            color: var(--color-text-white);
            white-space: nowrap;
            overflow: hidden;
            text-overflow: ellipsis;
        }
        .hero-panel-desc {
            font-size: 12px;
            color: rgba(255, 255, 255, 0.7);
            white-space: nowrap;
            overflow: hidden;
            text-overflow: ellipsis;
        }
        .hero-panel-badge {
            font-size: 12px;
            font-weight: 600;
            padding: 4px 10px;
            border-radius: 999px;
            background: rgba(255, 255, 255, 0.15);
            color: #77B8E3;
            flex-shrink: 0;
        }

        /* ===== Data Metrics Band ===== */
        .metrics-band {
            background: var(--color-bg-blue-tint);
            border-bottom: 1px solid var(--color-border-light);
            padding: var(--spacing-lg) 0;
        }
        .metrics-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: var(--spacing-md);
        }
        .metric-card {
            background: var(--color-surface);
            border-radius: var(--radius-md);
            border: 1px solid var(--color-border);
            box-shadow: var(--shadow-sm);
            padding: var(--spacing-md);
            text-align: center;
            transition: all var(--transition-fast);
        }
        .metric-card:hover {
            box-shadow: var(--shadow-md);
            transform: translateY(-2px);
        }
        .metric-number {
            font-size: 32px;
            font-weight: 700;
            color: var(--color-accent);
            letter-spacing: 0.5px;
            margin-bottom: 4px;
        }
        .metric-label {
            font-size: 14px;
            color: var(--color-text-muted);
            font-weight: 500;
        }

        /* ===== Panel Grid ===== */
        .panel-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
            gap: var(--spacing-md);
        }
        .panel-card {
            background: var(--color-surface);
            border-radius: var(--radius-md);
            border: 1px solid var(--color-border);
            box-shadow: var(--shadow-sm);
            padding: var(--spacing-lg);
            transition: all var(--transition-base);
        }
        .panel-card:hover {
            box-shadow: var(--shadow-md);
            transform: translateY(-2px);
        }
        .panel-card .card-icon {
            width: 44px;
            height: 44px;
            border-radius: 10px;
            background: var(--color-bg-blue-tint);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 22px;
            margin-bottom: var(--spacing-sm);
        }
        .panel-card h3 {
            font-size: 18px;
            font-weight: 600;
            color: var(--color-text-heading);
            margin-bottom: 8px;
            letter-spacing: 0.3px;
        }
        .panel-card p {
            font-size: 14px;
            color: var(--color-text-muted);
            line-height: 1.8;
        }

        /* ===== Highlight Wall ===== */
        .highlights-grid {
            display: grid;
            grid-template-columns: repeat(12, 1fr);
            gap: var(--spacing-md);
        }
        .highlight-card {
            background: var(--color-surface);
            border-radius: var(--radius-lg);
            border: 1px solid var(--color-border);
            box-shadow: var(--shadow-sm);
            overflow: hidden;
            transition: all var(--transition-base);
        }
        .highlight-card:hover {
            box-shadow: var(--shadow-md);
            transform: translateY(-3px);
        }
        .highlight-card-wide {
            grid-column: span 7;
        }
        .highlight-card-slim {
            grid-column: span 5;
        }
        .highlight-card-medium {
            grid-column: span 4;
        }
        .highlight-card img {
            width: 100%;
            height: 200px;
            object-fit: cover;
        }
        .highlight-card-body {
            padding: var(--spacing-md);
        }
        .highlight-card-body h3 {
            font-size: 17px;
            font-weight: 600;
            color: var(--color-text-heading);
            margin-bottom: 6px;
            letter-spacing: 0.3px;
        }
        .highlight-card-body p {
            font-size: 14px;
            color: var(--color-text-muted);
            line-height: 1.7;
            display: -webkit-box;
            -webkit-line-clamp: 3;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }
        .highlight-tag {
            display: inline-block;
            font-size: 12px;
            font-weight: 600;
            padding: 4px 10px;
            border-radius: 999px;
            background: var(--color-bg-blue-tint);
            color: var(--color-primary);
            margin-bottom: 8px;
        }

        /* ===== Comparison Section ===== */
        .comparison-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: var(--spacing-md);
        }
        .comparison-card {
            background: var(--color-surface);
            border-radius: var(--radius-md);
            border: 1px solid var(--color-border);
            box-shadow: var(--shadow-sm);
            padding: var(--spacing-lg);
            transition: all var(--transition-base);
            position: relative;
        }
        .comparison-card:hover {
            box-shadow: var(--shadow-md);
            transform: translateY(-3px);
        }
        .comparison-card.featured {
            border-color: var(--color-primary);
            background: linear-gradient(180deg, var(--color-bg-blue-tint) 0%, var(--color-surface) 80%);
        }
        .comparison-card .badge-featured {
            position: absolute;
            top: -10px;
            right: 16px;
            background: var(--color-primary);
            color: var(--color-text-white);
            font-size: 12px;
            font-weight: 600;
            padding: 4px 12px;
            border-radius: 999px;
        }
        .comparison-card h3 {
            font-size: 18px;
            font-weight: 600;
            color: var(--color-text-heading);
            margin-bottom: 12px;
            letter-spacing: 0.3px;
        }
        .comparison-feature-list {
            margin-bottom: var(--spacing-md);
        }
        .comparison-feature-list li {
            padding: 6px 0;
            font-size: 14px;
            color: var(--color-text-body);
            display: flex;
            align-items: flex-start;
            gap: 8px;
            line-height: 1.6;
        }
        .comparison-feature-list li::before {
            content: "✓";
            font-weight: 700;
            color: var(--color-primary);
            flex-shrink: 0;
        }

        /* ===== News Section ===== */
        .news-list {
            display: flex;
            flex-direction: column;
            gap: var(--spacing-md);
        }
        .news-card {
            display: flex;
            gap: var(--spacing-md);
            background: var(--color-surface);
            border-radius: var(--radius-md);
            border: 1px solid var(--color-border);
            box-shadow: var(--shadow-sm);
            padding: var(--spacing-md);
            transition: all var(--transition-base);
        }
        .news-card:hover {
            box-shadow: var(--shadow-md);
            transform: translateY(-2px);
        }
        .news-date-badge {
            flex-shrink: 0;
            width: 60px;
            height: 60px;
            background: var(--color-bg-blue-tint);
            border-radius: var(--radius-sm);
            display: flex;
            flex-direction: column;
            align-items: center;
            justify-content: center;
            border: 1px solid var(--color-border-light);
        }
        .news-date-day {
            font-size: 20px;
            font-weight: 700;
            color: var(--color-primary);
            line-height: 1.2;
        }
        .news-date-month {
            font-size: 12px;
            color: var(--color-text-muted);
        }
        .news-body {
            flex: 1;
            min-width: 0;
        }
        .news-body h3 {
            font-size: 17px;
            font-weight: 600;
            color: var(--color-text-heading);
            margin-bottom: 6px;
            letter-spacing: 0.3px;
        }
        .news-body p {
            font-size: 14px;
            color: var(--color-text-muted);
            line-height: 1.7;
            margin-bottom: 10px;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }
        .news-read-more {
            font-size: 13px;
            font-weight: 600;
            color: var(--color-primary);
            padding: 4px 12px;
            border: 1px solid var(--color-primary);
            border-radius: var(--radius-sm);
            transition: all var(--transition-fast);
            display: inline-block;
        }
        .news-read-more:hover {
            background: var(--color-bg-blue-tint);
            color: var(--color-primary-dark);
        }

        /* ===== Deep Content / Brand Intro ===== */
        .deep-content-block {
            background: var(--color-surface);
            border-radius: var(--radius-lg);
            border: 1px solid var(--color-border);
            box-shadow: var(--shadow-sm);
            padding: var(--spacing-xl);
            margin-bottom: var(--spacing-md);
        }
        .deep-content-block h3 {
            font-size: 22px;
            font-weight: 700;
            color: var(--color-text-heading);
            margin-bottom: var(--spacing-sm);
            letter-spacing: 0.3px;
        }
        .deep-content-block h4 {
            font-size: 17px;
            font-weight: 600;
            color: var(--color-text-heading);
            margin: var(--spacing-md) 0 8px;
            letter-spacing: 0.3px;
        }
        .deep-content-block p {
            font-size: 15px;
            color: var(--color-text-body);
            line-height: 1.9;
            margin-bottom: var(--spacing-sm);
        }
        .deep-content-block ul {
            margin: var(--spacing-sm) 0;
            padding-left: var(--spacing-md);
            list-style: disc;
        }
        .deep-content-block ul li {
            font-size: 15px;
            color: var(--color-text-body);
            line-height: 1.8;
            margin-bottom: 6px;
        }
        .deep-content-block .content-image {
            border-radius: var(--radius-md);
            overflow: hidden;
            margin: var(--spacing-md) 0;
        }
        .deep-content-block .content-image img {
            width: 100%;
            height: auto;
            object-fit: cover;
        }
        .content-image-floating-left {
            float: left;
            width: 45%;
            margin-right: var(--spacing-md);
            margin-bottom: var(--spacing-sm);
            border-radius: var(--radius-md);
            overflow: hidden;
        }
        .content-image-floating-right {
            float: right;
            width: 45%;
            margin-left: var(--spacing-md);
            margin-bottom: var(--spacing-sm);
            border-radius: var(--radius-md);
            overflow: hidden;
        }

        /* ===== Assurance / Trust ===== */
        .assurance-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
            gap: var(--spacing-md);
        }
        .assurance-item {
            background: var(--color-surface);
            border-radius: var(--radius-md);
            border: 1px solid var(--color-border);
            box-shadow: var(--shadow-sm);
            padding: var(--spacing-md);
            display: flex;
            align-items: flex-start;
            gap: 10px;
            transition: all var(--transition-fast);
        }
        .assurance-item:hover {
            box-shadow: var(--shadow-md);
        }
        .assurance-icon {
            font-size: 22px;
            flex-shrink: 0;
            margin-top: 2px;
        }
        .assurance-item h4 {
            font-size: 15px;
            font-weight: 600;
            color: var(--color-text-heading);
            margin-bottom: 4px;
        }
        .assurance-item p {
            font-size: 13px;
            color: var(--color-text-muted);
            line-height: 1.6;
        }

        /* ===== Changelog ===== */
        .changelog-list {
            display: flex;
            flex-direction: column;
            gap: var(--spacing-sm);
        }
        .changelog-item {
            background: var(--color-surface);
            border-radius: var(--radius-md);
            border: 1px solid var(--color-border);
            box-shadow: var(--shadow-sm);
            padding: var(--spacing-md);
            display: flex;
            gap: var(--spacing-md);
            align-items: flex-start;
            transition: all var(--transition-fast);
        }
        .changelog-item:hover {
            box-shadow: var(--shadow-md);
        }
        .changelog-version {
            flex-shrink: 0;
            font-size: 13px;
            font-weight: 700;
            padding: 4px 12px;
            border-radius: 999px;
            background: var(--color-primary);
            color: var(--color-text-white);
            margin-top: 2px;
        }
        .changelog-item h4 {
            font-size: 15px;
            font-weight: 600;
            color: var(--color-text-heading);
            margin-bottom: 4px;
        }
        .changelog-item p {
            font-size: 14px;
            color: var(--color-text-muted);
            line-height: 1.7;
        }

        /* ===== Testimonials ===== */
        .testimonials-grid {
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: var(--spacing-md);
        }
        .testimonial-card {
            background: var(--color-surface);
            border-radius: var(--radius-lg);
            border: 1px solid var(--color-border);
            box-shadow: var(--shadow-sm);
            padding: var(--spacing-lg);
            position: relative;
            transition: all var(--transition-base);
        }
        .testimonial-card:hover {
            box-shadow: var(--shadow-md);
            transform: translateY(-2px);
        }
        .testimonial-quote-mark {
            font-size: 48px;
            line-height: 1;
            color: var(--color-primary);
            opacity: 0.25;
            font-family: Georgia, "Times New Roman", serif;
            position: absolute;
            top: 12px;
            left: 16px;
        }
        .testimonial-text {
            font-size: 15px;
            color: var(--color-text-body);
            line-height: 1.8;
            margin-bottom: var(--spacing-sm);
            padding-left: var(--spacing-lg);
            position: relative;
            z-index: 1;
        }
        .testimonial-author {
            font-size: 13px;
            color: var(--color-text-muted);
            font-weight: 600;
            padding-left: var(--spacing-lg);
        }

        /* ===== FAQ ===== */
        .faq-list {
            display: flex;
            flex-direction: column;
            gap: var(--spacing-sm);
        }
        .faq-item {
            background: var(--color-surface);
            border-radius: var(--radius-md);
            border: 1px solid var(--color-border);
            box-shadow: var(--shadow-sm);
            overflow: hidden;
            transition: all var(--transition-base);
        }
        .faq-item.active {
            border-color: var(--color-primary-light);
            box-shadow: var(--shadow-md);
        }
        .faq-question {
            width: 100%;
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding: var(--spacing-md);
            gap: var(--spacing-sm);
            font-size: 16px;
            font-weight: 600;
            color: var(--color-text-heading);
            text-align: left;
            cursor: pointer;
            transition: all var(--transition-fast);
        }
        .faq-question:hover {
            background: var(--color-bg-blue-tint);
        }
        .faq-question .faq-toggle {
            flex-shrink: 0;
            width: 26px;
            height: 26px;
            border-radius: 50%;
            background: var(--color-bg-blue-tint);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 16px;
            color: var(--color-primary);
            transition: all var(--transition-fast);
        }
        .faq-item.active .faq-toggle {
            transform: rotate(45deg);
            background: var(--color-primary);
            color: var(--color-text-white);
        }
        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height var(--transition-base), padding var(--transition-base);
            padding: 0 var(--spacing-md);
            font-size: 15px;
            color: var(--color-text-muted);
            line-height: 1.8;
        }
        .faq-item.active .faq-answer {
            max-height: 300px;
            padding: 0 var(--spacing-md) var(--spacing-md);
        }

        /* ===== CTA Section ===== */
        .cta-section {
            background: var(--color-bg-blue-tint-strong);
            border-radius: var(--radius-lg);
            border: 1px solid var(--color-border-light);
            padding: var(--spacing-xl);
        }
        .cta-content {
            max-width: 600px;
            margin: 0 auto;
            text-align: center;
        }
        .cta-content h2 {
            font-size: 26px;
            font-weight: 700;
            color: var(--color-text-heading);
            margin-bottom: 8px;
            letter-spacing: 0.5px;
        }
        .cta-content p {
            font-size: 15px;
            color: var(--color-text-muted);
            margin-bottom: var(--spacing-md);
            line-height: 1.8;
        }
        .subscribe-form {
            display: flex;
            gap: 8px;
            margin-bottom: var(--spacing-sm);
            flex-wrap: wrap;
        }
        .subscribe-input {
            flex: 1;
            min-width: 220px;
            padding: 12px 16px;
            border-radius: var(--radius-sm);
            border: 1px solid var(--color-border);
            font-size: 15px;
            color: var(--color-text-body);
            background: var(--color-surface);
            transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
        }
        .subscribe-input:focus {
            border-color: var(--color-primary);
            box-shadow: 0 0 0 3px rgba(30, 91, 143, 0.1);
        }
        .subscribe-btn {
            padding: 12px 28px;
            border-radius: var(--radius-sm);
            background: var(--color-primary);
            color: var(--color-text-white);
            font-size: 15px;
            font-weight: 600;
            letter-spacing: 0.3px;
            transition: all var(--transition-fast);
            white-space: nowrap;
        }
        .subscribe-btn:hover {
            background: var(--color-primary-dark);
            box-shadow: var(--shadow-md);
        }
        .subscribe-btn:active {
            transform: translateY(0);
            box-shadow: var(--shadow-sm);
        }
        .privacy-note {
            font-size: 12px;
            color: var(--color-text-muted);
            text-align: center;
        }
        .cta-extra-actions {
            display: flex;
            gap: var(--spacing-sm);
            justify-content: center;
            margin-top: var(--spacing-md);
            flex-wrap: wrap;
        }
        .rss-btn {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            padding: 10px 20px;
            border-radius: var(--radius-sm);
            border: 1px solid var(--color-primary);
            background: var(--color-surface);
            color: var(--color-primary);
            font-size: 14px;
            font-weight: 600;
            transition: all var(--transition-fast);
        }
        .rss-btn:hover {
            background: var(--color-bg-blue-tint);
            color: var(--color-primary-dark);
        }

        /* ===== Footer ===== */
        .site-footer {
            background: #1A2B3C;
            color: rgba(255, 255, 255, 0.75);
            padding: var(--spacing-xl) 0 var(--spacing-md);
            margin-top: var(--spacing-2xl);
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 1.4fr 1fr 1fr 1.2fr;
            gap: var(--spacing-xl);
            margin-bottom: var(--spacing-lg);
        }
        .footer-brand .brand-name {
            color: var(--color-text-white);
            font-size: 22px;
            margin-bottom: 8px;
        }
        .footer-brand p {
            font-size: 13px;
            line-height: 1.7;
            color: rgba(255, 255, 255, 0.6);
        }
        .footer-col h4 {
            font-size: 15px;
            font-weight: 600;
            color: var(--color-text-white);
            margin-bottom: 12px;
            letter-spacing: 0.3px;
        }
        .footer-col ul li {
            margin-bottom: 6px;
        }
        .footer-col ul li a {
            font-size: 13px;
            color: rgba(255, 255, 255, 0.6);
            transition: color var(--transition-fast);
        }
        .footer-col ul li a:hover {
            color: #77B8E3;
        }
        .footer-bottom {
            border-top: 1px solid rgba(255, 255, 255, 0.12);
            padding-top: var(--spacing-md);
            display: flex;
            flex-wrap: wrap;
            gap: var(--spacing-sm);
            align-items: center;
            justify-content: space-between;
            font-size: 12px;
            color: rgba(255, 255, 255, 0.5);
        }
        .footer-bottom a {
            color: rgba(255, 255, 255, 0.5);
            transition: color var(--transition-fast);
        }
        .footer-bottom a:hover {
            color: #77B8E3;
        }
        .footer-bottom-links {
            display: flex;
            gap: var(--spacing-sm);
            align-items: center;
            flex-wrap: wrap;
        }

        /* ===== Responsive ===== */
        @media (max-width: 1024px) {
            .hero .container {
                grid-template-columns: 1fr;
                gap: var(--spacing-lg);
            }
            .hero h1 {
                font-size: 34px;
            }
            .comparison-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .highlight-card-wide,
            .highlight-card-slim {
                grid-column: span 6;
            }
            .highlight-card-medium {
                grid-column: span 6;
            }
            .footer-grid {
                grid-template-columns: 1fr 1fr;
                gap: var(--spacing-lg);
            }
            .nav-main {
                gap: 4px;
            }
            .nav-card-item {
                padding: 6px 10px;
                font-size: 13px;
            }
        }

        @media (max-width: 768px) {
            .section {
                padding: var(--spacing-xl) 0;
            }
            .section-heading h2 {
                font-size: 24px;
            }
            .hero {
                padding: var(--spacing-xl) 0;
                min-height: auto;
            }
            .hero h1 {
                font-size: 28px;
            }
            .hero-desc {
                font-size: 15px;
            }
            .hero-stats-row {
                gap: var(--spacing-md);
            }
            .hero-stat-number {
                font-size: 20px;
            }
            .nav-main {
                display: none;
            }
            .hamburger {
                display: flex;
            }
            .mobile-drawer {
                display: block;
            }
            .nav-actions .nav-cta-secondary {
                display: none;
            }
            .metrics-grid {
                grid-template-columns: repeat(2, 1fr);
                gap: 10px;
            }
            .metric-number {
                font-size: 24px;
            }
            .comparison-grid {
                grid-template-columns: 1fr;
            }
            .highlight-card-wide,
            .highlight-card-slim,
            .highlight-card-medium {
                grid-column: span 12;
            }
            .highlight-card img {
                height: 170px;
            }
            .testimonials-grid {
                grid-template-columns: 1fr;
            }
            .news-card {
                flex-direction: column;
            }
            .news-date-badge {
                width: 100%;
                height: auto;
                flex-direction: row;
                gap: 8px;
                padding: 8px 12px;
            }
            .news-date-day {
                font-size: 16px;
            }
            .deep-content-block {
                padding: var(--spacing-md);
            }
            .deep-content-block h3 {
                font-size: 19px;
            }
            .content-image-floating-left,
            .content-image-floating-right {
                float: none;
                width: 100%;
                margin: var(--spacing-sm) 0;
            }
            .cta-section {
                padding: var(--spacing-md);
            }
            .cta-content h2 {
                font-size: 22px;
            }
            .subscribe-form {
                flex-direction: column;
            }
            .subscribe-input {
                min-width: 100%;
            }
            .footer-grid {
                grid-template-columns: 1fr;
                gap: var(--spacing-md);
            }
            .footer-bottom {
                flex-direction: column;
                text-align: center;
                gap: 8px;
            }
            .footer-bottom-links {
                justify-content: center;
            }
            .container {
                padding: 0 16px;
            }
            .hero .container {
                gap: var(--spacing-md);
            }
        }

        @media (max-width: 520px) {
            .hero h1 {
                font-size: 24px;
            }
            .metrics-grid {
                grid-template-columns: 1fr;
            }
            .btn {
                padding: 10px 18px;
                font-size: 14px;
            }
            .hero-actions {
                flex-direction: column;
            }
            .hero-actions .btn {
                width: 100%;
                justify-content: center;
            }
            .assurance-grid {
                grid-template-columns: 1fr;
            }
            .changelog-item {
                flex-direction: column;
            }
            .comparison-card .badge-featured {
                position: static;
                display: inline-block;
                margin-bottom: 8px;
            }
        }

/* roulang page: category1 */
:root {
 --color-primary: #1E5B8F;
 --color-primary-dark: #16476E;
 --color-primary-light: #3A8BC2;
 --color-accent: #3A8BC2;
 --color-bg: #F7F9FB;
 --color-surface: #FFFFFF;
 --color-border: #E1E7EC;
 --color-border-light: #E8EEF3;
 --color-text-heading: #1A2B3C;
 --color-text-body: #2F3E4E;
 --color-text-muted: #6B7A8C;
 --color-text-white: #FFFFFF;
 --color-overlay-dark: rgba(26,43,60,0.78);
 --color-bg-blue-tint: rgba(30,91,143,0.06);
 --color-bg-blue-tint-strong: rgba(30,91,143,0.12);
 --radius-sm: 8px;
 --radius-md: 12px;
 --radius-lg: 16px;
 --shadow-sm: 0 2px 8px rgba(26,43,60,0.06);
 --shadow-md: 0 4px 14px rgba(26,43,60,0.08);
 --shadow-lg: 0 6px 18px rgba(26,43,60,0.12);
 --shadow-xl: 0 10px 28px rgba(26,43,60,0.16);
 --font-family: "PingFang SC","Microsoft YaHei","Noto Sans SC","Hiragino Sans GB",sans-serif;
 --max-width: 1200px;
 --spacing-sm: 12px;
 --spacing-md: 20px;
 --spacing-lg: 32px;
 --spacing-xl: 48px;
 --spacing-2xl: 72px;
 --spacing-3xl: 96px;
 --transition-fast: 0.2s ease;
 --transition-base: 0.3s ease;
 --transition-slow: 0.4s ease;
 }

 *,
 *::before,
 *::after {
 box-sizing: border-box;
 margin: 0;
 padding: 0;
 }

 html {
 scroll-behavior: smooth;
 -webkit-font-smoothing: antialiased;
 -moz-osx-font-smoothing: grayscale;
 }

 body {
 font-family: var(--font-family);
 font-size: 16px;
 line-height: 1.8;
 color: var(--color-text-body);
 background-color: var(--color-bg);
 min-height: 100vh;
 }

 img {
 max-width: 100%;
 height: auto;
 display: block;
 }

 a {
 color: var(--color-primary);
 text-decoration: none;
 transition: color var(--transition-fast);
 }

 a:hover {
 color: var(--color-primary-dark);
 }

 button,
 input {
 font-family: inherit;
 font-size: inherit;
 border: none;
 outline: none;
 background: none;
 }

 button {
 cursor: pointer;
 }

 ul,
 ol {
 list-style: none;
 }

 .container {
 max-width: var(--max-width);
 margin: 0 auto;
 padding: 0 var(--spacing-md);
 }

 .section {
 padding: var(--spacing-2xl) 0;
 }

 .section-heading {
 margin-bottom: var(--spacing-lg);
 }

 .section-heading h2 {
 font-size: 28px;
 font-weight: 700;
 color: var(--color-text-heading);
 letter-spacing: 0.5px;
 position: relative;
 padding-bottom: var(--spacing-sm);
 display: inline-block;
 margin-bottom: 8px;
 }

 .section-heading h2::after {
 content: "";
 position: absolute;
 bottom: 0;
 left: 0;
 width: 48px;
 height: 3px;
 background: var(--color-primary);
 border-radius: 2px;
 }

 .section-heading .section-sub {
 font-size: 15px;
 color: var(--color-text-muted);
 max-width: 680px;
 line-height: 1.9;
 }

 .site-header {
 position: sticky;
 top: 0;
 z-index: 100;
 background: var(--color-surface);
 box-shadow: var(--shadow-sm);
 border-bottom: 1px solid var(--color-border-light);
 padding: 0;
 }

 .site-header .container {
 display: flex;
 align-items: center;
 justify-content: space-between;
 min-height: 72px;
 padding-top: 10px;
 padding-bottom: 10px;
 gap: var(--spacing-md);
 }

 .brand {
 display: flex;
 align-items: center;
 gap: 10px;
 flex-shrink: 0;
 }

 .brand-logo-mark {
 width: 40px;
 height: 40px;
 border-radius: var(--radius-sm);
 background: var(--color-primary);
 color: var(--color-text-white);
 display: flex;
 align-items: center;
 justify-content: center;
 font-size: 20px;
 font-weight: 700;
 flex-shrink: 0;
 }

 .brand-name {
 font-size: 20px;
 font-weight: 700;
 color: var(--color-text-heading);
 letter-spacing: 0.5px;
 white-space: nowrap;
 }

 .nav-main {
 display: flex;
 align-items: center;
 gap: 6px;
 flex-wrap: nowrap;
 overflow-x: auto;
 scrollbar-width: thin;
 scrollbar-color: var(--color-border) transparent;
 -webkit-overflow-scrolling: touch;
 padding: 2px 0;
 }

 .nav-main::-webkit-scrollbar {
 height: 4px;
 }

 .nav-main::-webkit-scrollbar-thumb {
 background: var(--color-border);
 border-radius: 2px;
 }

 .nav-card-item {
 display: inline-flex;
 align-items: center;
 gap: 6px;
 padding: 8px 14px;
 border-radius: var(--radius-sm);
 background: transparent;
 color: var(--color-text-body);
 font-size: 14px;
 font-weight: 500;
 white-space: nowrap;
 transition: all var(--transition-fast);
 }

 .nav-card-item:hover {
 background: var(--color-bg-blue-tint);
 color: var(--color-primary);
 }

 .nav-card-item.active {
 background: var(--color-primary);
 color: var(--color-text-white);
 box-shadow: var(--shadow-sm);
 }

 .nav-icon {
 font-size: 16px;
 line-height: 1;
 }

 .header-cta {
 display: flex;
 align-items: center;
 gap: 8px;
 flex-shrink: 0;
 }

 .btn {
 display: inline-flex;
 align-items: center;
 justify-content: center;
 gap: 6px;
 border-radius: var(--radius-sm);
 padding: 10px 20px;
 font-size: 15px;
 font-weight: 600;
 line-height: 1.4;
 transition: all var(--transition-base);
 }

 .btn-primary {
 background: var(--color-primary);
 color: var(--color-text-white);
 }

 .btn-primary:hover {
 background: var(--color-primary-dark);
 color: var(--color-text-white);
 box-shadow: var(--shadow-md);
 transform: translateY(-1px);
 }

 .btn-primary:active {
 transform: translateY(0);
 box-shadow: var(--shadow-sm);
 }

 .btn-primary:focus-visible {
 outline: 2px solid rgba(30,91,143,0.4);
 outline-offset: 2px;
 }

 .btn-outline {
 background: var(--color-surface);
 color: var(--color-primary);
 border: 1px solid var(--color-primary);
 }

 .btn-outline:hover {
 background: var(--color-bg-blue-tint);
 color: var(--color-primary-dark);
 border-color: var(--color-primary-dark);
 box-shadow: var(--shadow-sm);
 }

 .btn-outline:focus-visible {
 outline: 2px solid rgba(30,91,143,0.35);
 outline-offset: 2px;
 }

 .btn-sm {
 padding: 7px 14px;
 font-size: 13px;
 border-radius: 6px;
 }

 .btn-text {
 display: inline-flex;
 align-items: center;
 gap: 4px;
 color: var(--color-primary);
 font-weight: 600;
 font-size: 14px;
 transition: all var(--transition-fast);
 }

 .btn-text:hover {
 color: var(--color-primary-dark);
 gap: 8px;
 }

 .mobile-toggle {
 display: none;
 width: 42px;
 height: 42px;
 border-radius: var(--radius-sm);
 background: var(--color-bg-blue-tint);
 color: var(--color-text-heading);
 font-size: 22px;
 align-items: center;
 justify-content: center;
 transition: all var(--transition-fast);
 }

 .mobile-toggle:hover {
 background: var(--color-border-light);
 }

 .page-header {
 background: var(--color-surface);
 border-bottom: 1px solid var(--color-border-light);
 padding: var(--spacing-lg) 0 var(--spacing-md);
 }

 .breadcrumb {
 display: flex;
 align-items: center;
 gap: 8px;
 font-size: 14px;
 color: var(--color-text-muted);
 margin-bottom: var(--spacing-md);
 flex-wrap: wrap;
 }

 .breadcrumb a {
 color: var(--color-text-muted);
 }

 .breadcrumb a:hover {
 color: var(--color-primary);
 }

 .breadcrumb .sep {
 color: var(--color-border);
 }

 .breadcrumb .current {
 color: var(--color-text-heading);
 font-weight: 600;
 }

 .page-header-content h1 {
 font-size: 34px;
 font-weight: 700;
 color: var(--color-text-heading);
 letter-spacing: 0.5px;
 margin-bottom: var(--spacing-sm);
 }

 .page-header-content .tagline {
 font-size: 16px;
 color: var(--color-text-muted);
 max-width: 760px;
 line-height: 1.9;
 }

 .category-desc-block {
 background: var(--color-surface);
 border: 1px solid var(--color-border-light);
 border-radius: var(--radius-md);
 padding: var(--spacing-lg);
 margin-bottom: var(--spacing-xl);
 box-shadow: var(--shadow-sm);
 }

 .category-desc-block p {
 color: var(--color-text-body);
 font-size: 15px;
 line-height: 1.9;
 }

 .article-horizontal-list {
 display: flex;
 flex-direction: column;
 gap: var(--spacing-lg);
 }

 .article-horizontal-card {
 display: flex;
 background: var(--color-surface);
 border: 1px solid var(--color-border-light);
 border-radius: var(--radius-lg);
 overflow: hidden;
 box-shadow: var(--shadow-sm);
 transition: all var(--transition-base);
 }

 .article-horizontal-card:hover {
 box-shadow: var(--shadow-lg);
 transform: translateY(-2px);
 }

 .article-horizontal-image {
 width: 40%;
 min-height: 220px;
 flex-shrink: 0;
 overflow: hidden;
 }

 .article-horizontal-image img {
 width: 100%;
 height: 100%;
 object-fit: cover;
 }

 .article-horizontal-body {
 width: 60%;
 padding: var(--spacing-lg);
 display: flex;
 flex-direction: column;
 justify-content: center;
 }

 .article-horizontal-body .article-meta {
 display: flex;
 align-items: center;
 gap: 12px;
 margin-bottom: 8px;
 font-size: 13px;
 color: var(--color-text-muted);
 }

 .article-horizontal-body .article-meta .badge {
 background: var(--color-bg-blue-tint-strong);
 color: var(--color-primary);
 padding: 3px 10px;
 border-radius: 20px;
 font-weight: 600;
 font-size: 12px;
 }

 .article-horizontal-body h3 {
 font-size: 20px;
 font-weight: 700;
 color: var(--color-text-heading);
 margin-bottom: 8px;
 line-height: 1.5;
 }

 .article-horizontal-body p {
 font-size: 14px;
 color: var(--color-text-muted);
 line-height: 1.8;
 margin-bottom: var(--spacing-sm);
 display: -webkit-box;
 -webkit-line-clamp: 2;
 -webkit-box-orient: vertical;
 overflow: hidden;
 }

 .related-categories {
 display: grid;
 grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
 gap: var(--spacing-md);
 }

 .related-category-card {
 background: var(--color-surface);
 border: 1px solid var(--color-border-light);
 border-radius: var(--radius-md);
 padding: var(--spacing-md);
 box-shadow: var(--shadow-sm);
 transition: all var(--transition-base);
 display: flex;
 align-items: center;
 gap: 12px;
 }

 .related-category-card:hover {
 box-shadow: var(--shadow-lg);
 transform: translateY(-2px);
 border-color: var(--color-primary-light);
 }

 .related-category-card .icon {
 width: 44px;
 height: 44px;
 border-radius: var(--radius-sm);
 background: var(--color-bg-blue-tint);
 display: flex;
 align-items: center;
 justify-content: center;
 font-size: 20px;
 flex-shrink: 0;
 }

 .related-category-card .info h4 {
 font-size: 15px;
 font-weight: 700;
 color: var(--color-text-heading);
 margin-bottom: 2px;
 }

 .related-category-card .info p {
 font-size: 13px;
 color: var(--color-text-muted);
 line-height: 1.6;
 }

 .pagination {
 display: flex;
 align-items: center;
 justify-content: center;
 gap: 8px;
 margin-top: var(--spacing-xl);
 flex-wrap: wrap;
 }

 .page-btn {
 width: 40px;
 height: 40px;
 border-radius: var(--radius-sm);
 background: var(--color-surface);
 border: 1px solid var(--color-border-light);
 color: var(--color-text-body);
 font-weight: 600;
 font-size: 14px;
 display: flex;
 align-items: center;
 justify-content: center;
 transition: all var(--transition-fast);
 }

 .page-btn:hover {
 background: var(--color-bg-blue-tint);
 color: var(--color-primary);
 border-color: var(--color-primary-light);
 }

 .page-btn.active {
 background: var(--color-primary);
 color: var(--color-text-white);
 border-color: var(--color-primary);
 }

 .page-btn.disabled {
 opacity: 0.4;
 cursor: not-allowed;
 pointer-events: none;
 }

 .site-footer {
 background: #21374B;
 color: rgba(255,255,255,0.78);
 padding: var(--spacing-2xl) 0 var(--spacing-lg);
 }

 .footer-grid {
 display: grid;
 grid-template-columns: 2fr 1fr 1fr 1fr;
 gap: var(--spacing-xl);
 margin-bottom: var(--spacing-xl);
 }

 .footer-brand .brand-name {
 color: var(--color-text-white);
 font-size: 22px;
 margin-bottom: 8px;
 display: block;
 }

 .footer-brand p {
 font-size: 14px;
 line-height: 1.8;
 color: rgba(255,255,255,0.65);
 }

 .footer-col h4 {
 color: var(--color-text-white);
 font-size: 16px;
 font-weight: 700;
 margin-bottom: var(--spacing-md);
 }

 .footer-col ul li {
 margin-bottom: 8px;
 }

 .footer-col ul li a {
 color: rgba(255,255,255,0.65);
 font-size: 14px;
 transition: color var(--transition-fast);
 }

 .footer-col ul li a:hover {
 color: var(--color-text-white);
 }

 .footer-bottom {
 display: flex;
 align-items: center;
 justify-content: space-between;
 flex-wrap: wrap;
 gap: var(--spacing-sm);
 border-top: 1px solid rgba(255,255,255,0.12);
 padding-top: var(--spacing-md);
 font-size: 13px;
 color: rgba(255,255,255,0.55);
 }

 .footer-bottom a {
 color: rgba(255,255,255,0.65);
 }

 .footer-bottom a:hover {
 color: var(--color-text-white);
 }

 .footer-bottom-links {
 display: flex;
 align-items: center;
 gap: 8px;
 }

 .footer-bottom-links span {
 color: rgba(255,255,255,0.3);
 }

 @media (max-width: 1024px) {
 .footer-grid {
 grid-template-columns: 2fr 1fr 1fr;
 }
 .article-horizontal-image {
 width: 36%;
 min-height: 200px;
 }
 .article-horizontal-body {
 width: 64%;
 padding: var(--spacing-md);
 }
 .article-horizontal-body h3 {
 font-size: 18px;
 }
 }

 @media (max-width: 768px) {
 .mobile-toggle {
 display: flex;
 }
 .nav-main {
 display: none;
 position: absolute;
 top: 72px;
 left: 0;
 right: 0;
 background: var(--color-surface);
 flex-direction: column;
 align-items: stretch;
 padding: var(--spacing-md);
 box-shadow: var(--shadow-lg);
 border-bottom: 1px solid var(--color-border-light);
 }
 .nav-main.open {
 display: flex;
 }
 .nav-card-item {
 padding: 10px 16px;
 font-size: 15px;
 }
 .header-cta {
 display: none;
 }
 .site-header .container {
 min-height: 62px;
 padding-top: 8px;
 padding-bottom: 8px;
 }
 .page-header-content h1 {
 font-size: 26px;
 }
 .section {
 padding: var(--spacing-xl) 0;
 }
 .section-heading h2 {
 font-size: 22px;
 }
 .article-horizontal-card {
 flex-direction: column;
 }
 .article-horizontal-image {
 width: 100%;
 min-height: 180px;
 max-height: 220px;
 }
 .article-horizontal-body {
 width: 100%;
 padding: var(--spacing-md);
 }
 .article-horizontal-body h3 {
 font-size: 17px;
 }
 .footer-grid {
 grid-template-columns: 1fr;
 gap: var(--spacing-lg);
 }
 .footer-bottom {
 flex-direction: column;
 align-items: flex-start;
 }
 .related-categories {
 grid-template-columns: 1fr;
 }
 .breadcrumb {
 font-size: 12px;
 gap: 4px;
 }
 }

 @media (max-width: 520px) {
 .container {
 padding: 0 16px;
 }
 .page-header-content h1 {
 font-size: 22px;
 }
 .category-desc-block {
 padding: var(--spacing-md);
 }
 .article-horizontal-image {
 min-height: 140px;
 max-height: 160px;
 }
 .article-horizontal-body h3 {
 font-size: 16px;
 }
 .article-horizontal-body p {
 font-size: 13px;
 }
 .section-heading h2 {
 font-size: 20px;
 }
 .related-category-card {
 padding: var(--spacing-sm);
 }
 }

 @media (prefers-reduced-motion: reduce) {
 *,
 *::before,
 *::after {
 animation-duration: 0.01ms !important;
 animation-iteration-count: 1 !important;
 transition-duration: 0.01ms !important;
 scroll-behavior: auto !important;
 }
 }

/* roulang page: category2 */
:root {
            --color-primary: #1E5B8F;
            --color-primary-dark: #16476E;
            --color-primary-light: #3A8BC2;
            --color-accent: #3A8BC2;
            --color-bg: #F7F9FB;
            --color-surface: #FFFFFF;
            --color-border: #E1E7EC;
            --color-border-light: #E8EEF3;
            --color-text-heading: #1A2B3C;
            --color-text-body: #2F3E4E;
            --color-text-muted: #6B7A8C;
            --color-text-white: #FFFFFF;
            --color-overlay-dark: rgba(26, 43, 60, 0.78);
            --color-bg-blue-tint: rgba(30, 91, 143, 0.06);
            --color-bg-blue-tint-strong: rgba(30, 91, 143, 0.12);
            --radius-sm: 8px;
            --radius-md: 12px;
            --radius-lg: 16px;
            --shadow-sm: 0 2px 8px rgba(26, 43, 60, 0.06);
            --shadow-md: 0 4px 14px rgba(26, 43, 60, 0.08);
            --shadow-lg: 0 6px 18px rgba(26, 43, 60, 0.12);
            --shadow-xl: 0 10px 28px rgba(26, 43, 60, 0.16);
            --font-family: "PingFang SC", "Microsoft YaHei", "Noto Sans SC", "Hiragino Sans GB", sans-serif;
            --max-width: 1200px;
            --spacing-sm: 12px;
            --spacing-md: 20px;
            --spacing-lg: 32px;
            --spacing-xl: 48px;
            --spacing-2xl: 72px;
            --spacing-3xl: 96px;
            --transition-fast: 0.2s ease;
            --transition-base: 0.3s ease;
            --transition-slow: 0.4s ease;
        }

        * {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
        }

        html {
            scroll-behavior: smooth;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
        }

        body {
            font-family: var(--font-family);
            font-size: 16px;
            line-height: 1.8;
            color: var(--color-text-body);
            background-color: var(--color-bg);
            min-height: 100vh;
            display: flex;
            flex-direction: column;
        }

        img {
            max-width: 100%;
            height: auto;
            display: block;
        }

        a {
            color: var(--color-primary);
            text-decoration: none;
            transition: color var(--transition-fast);
        }

        a:hover {
            color: var(--color-primary-dark);
        }

        button,
        input {
            font-family: inherit;
            font-size: inherit;
            border: none;
            outline: none;
            background: none;
        }

        button {
            cursor: pointer;
        }

        .container {
            max-width: var(--max-width);
            margin: 0 auto;
            padding: 0 var(--spacing-md);
            width: 100%;
        }

        .section {
            padding: var(--spacing-2xl) 0;
        }

        .section-heading {
            margin-bottom: var(--spacing-lg);
        }

        .section-heading h2 {
            font-size: 28px;
            font-weight: 700;
            color: var(--color-text-heading);
            letter-spacing: 0.5px;
            position: relative;
            padding-bottom: var(--spacing-sm);
            display: inline-block;
            margin-bottom: 8px;
        }

        .section-heading h2::after {
            content: "";
            position: absolute;
            bottom: 0;
            left: 0;
            width: 48px;
            height: 3px;
            background: var(--color-primary);
            border-radius: 2px;
        }

        .section-heading .section-sub {
            font-size: 15px;
            color: var(--color-text-muted);
            max-width: 680px;
            line-height: 1.9;
        }

        .section-heading.center {
            text-align: center;
        }

        .section-heading.center h2::after {
            left: 50%;
            transform: translateX(-50%);
        }

        .section-heading.center .section-sub {
            margin: 0 auto;
        }

        /* ===== Header / Navigation ===== */
        .site-header {
            position: sticky;
            top: 0;
            z-index: 100;
            background: var(--color-surface);
            box-shadow: var(--shadow-sm);
            border-bottom: 1px solid var(--color-border-light);
            padding: 0;
        }

        .site-header .container {
            display: flex;
            align-items: center;
            justify-content: space-between;
            min-height: 72px;
            padding-top: 10px;
            padding-bottom: 10px;
            gap: var(--spacing-md);
        }

        .brand {
            display: flex;
            align-items: center;
            gap: 10px;
            flex-shrink: 0;
        }

        .brand-logo-mark {
            width: 40px;
            height: 40px;
            border-radius: var(--radius-sm);
            background: var(--color-primary);
            color: var(--color-text-white);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 20px;
            font-weight: 700;
            letter-spacing: 0;
            flex-shrink: 0;
        }

        .brand-name {
            font-size: 20px;
            font-weight: 700;
            color: var(--color-text-heading);
            letter-spacing: 0.5px;
            white-space: nowrap;
        }

        .nav-main {
            display: flex;
            align-items: center;
            gap: 6px;
            flex-wrap: nowrap;
            overflow-x: auto;
            scrollbar-width: thin;
            scrollbar-color: var(--color-border) transparent;
            -webkit-overflow-scrolling: touch;
            padding: 2px;
        }

        .nav-main::-webkit-scrollbar {
            height: 4px;
        }

        .nav-main::-webkit-scrollbar-thumb {
            background: var(--color-border);
            border-radius: 2px;
        }

        .nav-card-item {
            display: inline-flex;
            align-items: center;
            gap: 5px;
            padding: 8px 13px;
            border-radius: var(--radius-sm);
            background: transparent;
            color: var(--color-text-body);
            font-size: 14px;
            font-weight: 500;
            white-space: nowrap;
            transition: all var(--transition-fast);
            border: 1px solid transparent;
        }

        .nav-card-item:hover {
            background: var(--color-bg-blue-tint);
            color: var(--color-primary);
            border-color: var(--color-border-light);
        }

        .nav-card-item.active {
            background: var(--color-primary);
            color: var(--color-text-white);
            border-color: var(--color-primary);
            box-shadow: var(--shadow-sm);
        }

        .nav-card-item .nav-icon {
            font-size: 16px;
            flex-shrink: 0;
        }

        .nav-toggle {
            display: none;
            flex-direction: column;
            gap: 5px;
            padding: 6px;
            border-radius: var(--radius-sm);
            background: transparent;
            border: 1px solid var(--color-border);
            transition: all var(--transition-fast);
            flex-shrink: 0;
        }

        .nav-toggle:hover {
            background: var(--color-bg-blue-tint);
            border-color: var(--color-primary-light);
        }

        .nav-toggle span {
            display: block;
            width: 22px;
            height: 2px;
            background: var(--color-text-heading);
            border-radius: 2px;
            transition: all var(--transition-base);
        }

        /* Mobile nav drawer */
        .nav-overlay {
            display: none;
            position: fixed;
            inset: 0;
            background: rgba(26, 43, 60, 0.5);
            z-index: 150;
            opacity: 0;
            transition: opacity var(--transition-base);
        }

        .nav-overlay.open {
            display: block;
            opacity: 1;
        }

        .nav-drawer {
            display: none;
            position: fixed;
            top: 0;
            right: -320px;
            width: 300px;
            max-width: 85vw;
            height: 100vh;
            background: var(--color-surface);
            z-index: 200;
            box-shadow: var(--shadow-xl);
            transition: right var(--transition-slow);
            flex-direction: column;
            padding: var(--spacing-lg) var(--spacing-md);
            overflow-y: auto;
        }

        .nav-drawer.open {
            right: 0;
        }

        .nav-drawer-header {
            display: flex;
            align-items: center;
            justify-content: space-between;
            margin-bottom: var(--spacing-lg);
            padding-bottom: var(--spacing-md);
            border-bottom: 1px solid var(--color-border-light);
        }

        .nav-drawer-close {
            font-size: 20px;
            color: var(--color-text-muted);
            padding: 4px 8px;
            border-radius: var(--radius-sm);
            transition: all var(--transition-fast);
        }

        .nav-drawer-close:hover {
            background: var(--color-bg-blue-tint);
            color: var(--color-text-heading);
        }

        .nav-drawer .nav-card-item {
            display: flex;
            width: 100%;
            padding: 14px 16px;
            font-size: 15px;
            border-radius: var(--radius-md);
            margin-bottom: 6px;
            background: var(--color-bg);
            border: 1px solid var(--color-border-light);
        }

        .nav-drawer .nav-card-item.active {
            background: var(--color-primary);
            color: var(--color-text-white);
            border-color: var(--color-primary);
        }

        /* ===== Breadcrumb ===== */
        .breadcrumb-bar {
            background: var(--color-surface);
            border-bottom: 1px solid var(--color-border-light);
            padding: 14px 0;
        }

        .breadcrumb-bar .container {
            display: flex;
            align-items: center;
            gap: 8px;
            font-size: 14px;
            color: var(--color-text-muted);
            flex-wrap: wrap;
        }

        .breadcrumb-bar a {
            color: var(--color-primary);
            transition: color var(--transition-fast);
        }

        .breadcrumb-bar a:hover {
            color: var(--color-primary-dark);
        }

        .breadcrumb-bar .sep {
            color: var(--color-border);
            font-size: 12px;
        }

        .breadcrumb-bar .current {
            color: var(--color-text-body);
            font-weight: 500;
        }

        /* ===== Category Hero ===== */
        .category-hero {
            background: var(--color-surface);
            border-bottom: 1px solid var(--color-border-light);
            padding: var(--spacing-xl) 0;
            position: relative;
            overflow: hidden;
        }

        .category-hero::before {
            content: "";
            position: absolute;
            top: 0;
            right: 0;
            width: 400px;
            height: 100%;
            background: var(--color-bg-blue-tint);
            border-radius: 0 0 0 60px;
            pointer-events: none;
        }

        .category-hero .container {
            position: relative;
            z-index: 1;
        }

        .category-hero-badge {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            padding: 5px 14px;
            border-radius: 20px;
            background: var(--color-bg-blue-tint-strong);
            color: var(--color-primary);
            font-size: 13px;
            font-weight: 600;
            margin-bottom: var(--spacing-sm);
            letter-spacing: 0.3px;
        }

        .category-hero h1 {
            font-size: 38px;
            font-weight: 700;
            color: var(--color-text-heading);
            letter-spacing: 0.5px;
            margin-bottom: var(--spacing-md);
            line-height: 1.35;
        }

        .category-hero-desc {
            font-size: 16px;
            color: var(--color-text-body);
            line-height: 2;
            max-width: 820px;
        }

        .category-hero-meta {
            display: flex;
            align-items: center;
            gap: var(--spacing-md);
            flex-wrap: wrap;
            margin-top: var(--spacing-md);
            font-size: 13px;
            color: var(--color-text-muted);
        }

        .category-hero-meta span {
            display: inline-flex;
            align-items: center;
            gap: 5px;
        }

        /* ===== Three Column Grid Cards ===== */
        .article-grid-section {
            padding: var(--spacing-2xl) 0;
        }

        .article-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: var(--spacing-lg);
        }

        .article-card {
            background: var(--color-surface);
            border-radius: var(--radius-lg);
            border: 1px solid var(--color-border);
            box-shadow: var(--shadow-sm);
            overflow: hidden;
            transition: all var(--transition-base);
            display: flex;
            flex-direction: column;
            height: 100%;
        }

        .article-card:hover {
            box-shadow: var(--shadow-lg);
            transform: translateY(-4px);
            border-color: var(--color-border-light);
        }

        .article-card-img {
            width: 100%;
            aspect-ratio: 16/9;
            overflow: hidden;
            background: var(--color-bg-blue-tint);
            position: relative;
        }

        .article-card-img img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform var(--transition-slow);
        }

        .article-card:hover .article-card-img img {
            transform: scale(1.04);
        }

        .article-card-img .img-badge {
            position: absolute;
            top: 12px;
            left: 12px;
            padding: 4px 12px;
            border-radius: 20px;
            background: rgba(255, 255, 255, 0.92);
            color: var(--color-primary);
            font-size: 12px;
            font-weight: 600;
            letter-spacing: 0.3px;
            backdrop-filter: blur(4px);
        }

        .article-card-body {
            padding: var(--spacing-md) var(--spacing-md) var(--spacing-lg);
            display: flex;
            flex-direction: column;
            flex: 1;
        }

        .article-card-date {
            font-size: 12px;
            color: var(--color-text-muted);
            margin-bottom: 10px;
            letter-spacing: 0.2px;
        }

        .article-card-title {
            font-size: 18px;
            font-weight: 700;
            color: var(--color-text-heading);
            line-height: 1.5;
            margin-bottom: 10px;
            letter-spacing: 0.3px;
        }

        .article-card-title a {
            color: var(--color-text-heading);
            transition: color var(--transition-fast);
        }

        .article-card-title a:hover {
            color: var(--color-primary);
        }

        .article-card-excerpt {
            font-size: 14px;
            color: var(--color-text-muted);
            line-height: 1.85;
            flex: 1;
            margin-bottom: var(--spacing-sm);
            display: -webkit-box;
            -webkit-line-clamp: 3;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }

        .article-card-link {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            font-size: 14px;
            font-weight: 600;
            color: var(--color-primary);
            transition: all var(--transition-fast);
            margin-top: auto;
        }

        .article-card-link:hover {
            color: var(--color-primary-dark);
            gap: 10px;
        }

        .article-card-link .arrow {
            font-size: 16px;
            transition: transform var(--transition-fast);
        }

        /* ===== Pagination ===== */
        .pagination-section {
            padding: 0 0 var(--spacing-2xl);
        }

        .pagination {
            display: flex;
            align-items: center;
            justify-content: center;
            gap: 6px;
            flex-wrap: wrap;
        }

        .pagination-btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            min-width: 42px;
            height: 42px;
            padding: 0 14px;
            border-radius: var(--radius-sm);
            background: var(--color-surface);
            border: 1px solid var(--color-border);
            color: var(--color-text-body);
            font-size: 14px;
            font-weight: 500;
            transition: all var(--transition-fast);
        }

        .pagination-btn:hover {
            border-color: var(--color-primary-light);
            color: var(--color-primary);
            background: var(--color-bg-blue-tint);
        }

        .pagination-btn.active {
            background: var(--color-primary);
            border-color: var(--color-primary);
            color: var(--color-text-white);
            box-shadow: var(--shadow-sm);
        }

        .pagination-btn.disabled {
            opacity: 0.5;
            pointer-events: none;
        }

        .pagination-info {
            text-align: center;
            font-size: 13px;
            color: var(--color-text-muted);
            margin-top: var(--spacing-sm);
        }

        /* ===== Related Categories ===== */
        .related-categories {
            background: var(--color-surface);
            border-top: 1px solid var(--color-border-light);
            border-bottom: 1px solid var(--color-border-light);
            padding: var(--spacing-2xl) 0;
        }

        .related-grid {
            display: grid;
            grid-template-columns: repeat(6, 1fr);
            gap: var(--spacing-md);
        }

        .related-card {
            background: var(--color-bg);
            border-radius: var(--radius-md);
            border: 1px solid var(--color-border-light);
            padding: var(--spacing-md);
            text-align: center;
            transition: all var(--transition-base);
            display: flex;
            flex-direction: column;
            align-items: center;
            gap: 8px;
        }

        .related-card:hover {
            background: var(--color-surface);
            border-color: var(--color-primary-light);
            box-shadow: var(--shadow-md);
            transform: translateY(-3px);
        }

        .related-card-icon {
            font-size: 28px;
            line-height: 1;
        }

        .related-card-name {
            font-size: 14px;
            font-weight: 600;
            color: var(--color-text-heading);
            letter-spacing: 0.3px;
        }

        .related-card:hover .related-card-name {
            color: var(--color-primary);
        }

        /* ===== CTA Subscribe ===== */
        .cta-section {
            padding: var(--spacing-2xl) 0;
        }

        .cta-card {
            background: var(--color-bg-blue-tint-strong);
            border-radius: var(--radius-lg);
            border: 1px solid var(--color-border-light);
            padding: var(--spacing-xl);
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: var(--spacing-lg);
            flex-wrap: wrap;
        }

        .cta-card-content {
            flex: 1;
            min-width: 280px;
        }

        .cta-card-content h3 {
            font-size: 24px;
            font-weight: 700;
            color: var(--color-text-heading);
            margin-bottom: 8px;
            letter-spacing: 0.3px;
        }

        .cta-card-content p {
            font-size: 15px;
            color: var(--color-text-body);
            line-height: 1.9;
        }

        .cta-card-form {
            display: flex;
            gap: 10px;
            flex-shrink: 0;
            min-width: 300px;
        }

        .cta-card-form input {
            flex: 1;
            padding: 12px 16px;
            border-radius: var(--radius-sm);
            border: 1px solid var(--color-border);
            background: var(--color-surface);
            font-size: 14px;
            color: var(--color-text-body);
            transition: all var(--transition-fast);
        }

        .cta-card-form input:focus {
            border-color: var(--color-primary);
            box-shadow: 0 0 0 3px rgba(30, 91, 143, 0.15);
        }

        .cta-card-form input::placeholder {
            color: var(--color-text-muted);
        }

        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 6px;
            padding: 12px 24px;
            border-radius: var(--radius-sm);
            font-size: 15px;
            font-weight: 600;
            letter-spacing: 0.3px;
            transition: all var(--transition-base);
            white-space: nowrap;
            border: 1px solid transparent;
        }

        .btn-primary {
            background: var(--color-primary);
            color: var(--color-text-white);
            border-color: var(--color-primary);
        }

        .btn-primary:hover {
            background: var(--color-primary-dark);
            border-color: var(--color-primary-dark);
            box-shadow: var(--shadow-md);
            color: var(--color-text-white);
        }

        .btn-primary:focus {
            box-shadow: 0 0 0 3px rgba(30, 91, 143, 0.3);
            outline: none;
        }

        .btn-primary:active {
            box-shadow: var(--shadow-sm);
            transform: translateY(1px);
        }

        .btn-outline {
            background: var(--color-surface);
            color: var(--color-primary);
            border-color: var(--color-primary);
        }

        .btn-outline:hover {
            background: var(--color-bg-blue-tint);
            border-color: var(--color-primary-dark);
            color: var(--color-primary-dark);
        }

        .btn-outline:focus {
            box-shadow: 0 0 0 3px rgba(30, 91, 143, 0.2);
            outline: none;
        }

        .form-privacy-hint {
            font-size: 12px;
            color: var(--color-text-muted);
            margin-top: 6px;
        }

        /* ===== FAQ ===== */
        .faq-section {
            padding: var(--spacing-2xl) 0;
            background: var(--color-bg);
        }

        .faq-list {
            max-width: 800px;
            margin: 0 auto;
            display: flex;
            flex-direction: column;
            gap: var(--spacing-md);
        }

        .faq-item {
            background: var(--color-surface);
            border-radius: var(--radius-md);
            border: 1px solid var(--color-border);
            overflow: hidden;
            transition: all var(--transition-base);
        }

        .faq-item.active {
            box-shadow: var(--shadow-md);
            border-color: var(--color-border-light);
        }

        .faq-question {
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: var(--spacing-sm);
            padding: var(--spacing-md) var(--spacing-lg);
            cursor: pointer;
            width: 100%;
            text-align: left;
            background: transparent;
            transition: background var(--transition-fast);
        }

        .faq-question:hover {
            background: var(--color-bg-blue-tint);
        }

        .faq-question-text {
            font-size: 16px;
            font-weight: 600;
            color: var(--color-text-heading);
            flex: 1;
            line-height: 1.6;
        }

        .faq-icon {
            font-size: 20px;
            color: var(--color-primary);
            transition: transform var(--transition-base);
            flex-shrink: 0;
        }

        .faq-item.active .faq-icon {
            transform: rotate(45deg);
        }

        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height var(--transition-slow), padding var(--transition-base);
            padding: 0 var(--spacing-lg);
            font-size: 15px;
            color: var(--color-text-muted);
            line-height: 1.9;
        }

        .faq-item.active .faq-answer {
            max-height: 300px;
            padding: 0 var(--spacing-lg) var(--spacing-lg);
        }

        /* ===== Footer ===== */
        .site-footer {
            background: #1A2B3C;
            color: rgba(255, 255, 255, 0.75);
            padding: var(--spacing-2xl) 0 0;
            margin-top: auto;
        }

        .site-footer .container {
            padding-bottom: var(--spacing-lg);
        }

        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr 1fr;
            gap: var(--spacing-xl);
            margin-bottom: var(--spacing-xl);
        }

        .footer-brand .brand-name {
            color: var(--color-text-white);
            font-size: 22px;
            font-weight: 700;
            margin-bottom: 10px;
            display: block;
            letter-spacing: 0.5px;
        }

        .footer-brand p {
            font-size: 14px;
            color: rgba(255, 255, 255, 0.7);
            line-height: 1.9;
            max-width: 320px;
        }

        .footer-col h4 {
            font-size: 15px;
            font-weight: 600;
            color: var(--color-text-white);
            margin-bottom: 14px;
            letter-spacing: 0.3px;
        }

        .footer-col ul {
            list-style: none;
            padding: 0;
            margin: 0;
        }

        .footer-col ul li {
            margin-bottom: 8px;
        }

        .footer-col ul li a {
            font-size: 14px;
            color: rgba(255, 255, 255, 0.7);
            transition: all var(--transition-fast);
        }

        .footer-col ul li a:hover {
            color: var(--color-text-white);
            padding-left: 4px;
        }

        .footer-bottom {
            border-top: 1px solid rgba(255, 255, 255, 0.12);
            padding: var(--spacing-md) 0;
            display: flex;
            align-items: center;
            justify-content: space-between;
            flex-wrap: wrap;
            gap: 10px;
            font-size: 12px;
            color: rgba(255, 255, 255, 0.55);
        }

        .footer-bottom-links {
            display: flex;
            align-items: center;
            gap: 8px;
        }

        .footer-bottom-links a {
            font-size: 12px;
            color: rgba(255, 255, 255, 0.7);
            transition: color var(--transition-fast);
        }

        .footer-bottom-links a:hover {
            color: var(--color-text-white);
        }

        .footer-bottom-links span {
            color: rgba(255, 255, 255, 0.35);
        }

        /* ===== Responsive ===== */
        @media (max-width: 1024px) {
            .article-grid {
                grid-template-columns: repeat(2, 1fr);
                gap: var(--spacing-md);
            }

            .related-grid {
                grid-template-columns: repeat(3, 1fr);
                gap: var(--spacing-sm);
            }

            .footer-grid {
                grid-template-columns: 1fr 1fr;
                gap: var(--spacing-lg);
            }

            .category-hero h1 {
                font-size: 32px;
            }

            .cta-card {
                flex-direction: column;
                align-items: stretch;
            }

            .cta-card-form {
                min-width: auto;
            }
        }

        @media (max-width: 768px) {
            .nav-main {
                display: none;
            }

            .nav-toggle {
                display: flex;
            }

            .nav-drawer {
                display: flex;
            }

            .article-grid {
                grid-template-columns: 1fr;
                gap: var(--spacing-md);
            }

            .related-grid {
                grid-template-columns: repeat(2, 1fr);
                gap: var(--spacing-sm);
            }

            .footer-grid {
                grid-template-columns: 1fr;
                gap: var(--spacing-lg);
                text-align: left;
            }

            .footer-brand p {
                max-width: 100%;
            }

            .footer-bottom {
                flex-direction: column;
                align-items: flex-start;
            }

            .category-hero h1 {
                font-size: 26px;
                line-height: 1.45;
            }

            .category-hero-desc {
                font-size: 15px;
                line-height: 1.9;
            }

            .section {
                padding: var(--spacing-xl) 0;
            }

            .article-grid-section {
                padding: var(--spacing-xl) 0;
            }

            .cta-card {
                padding: var(--spacing-lg);
            }

            .cta-card-form {
                flex-direction: column;
            }

            .cta-card-form input {
                width: 100%;
            }

            .section-heading h2 {
                font-size: 22px;
            }

            .faq-question {
                padding: var(--spacing-sm) var(--spacing-md);
            }

            .faq-question-text {
                font-size: 14px;
            }

            .faq-answer {
                padding: 0 var(--spacing-md);
                font-size: 14px;
            }

            .faq-item.active .faq-answer {
                padding: 0 var(--spacing-md) var(--spacing-md);
            }
        }

        @media (max-width: 520px) {
            .container {
                padding: 0 14px;
            }

            .category-hero h1 {
                font-size: 22px;
            }

            .category-hero-desc {
                font-size: 14px;
            }

            .article-card-title {
                font-size: 16px;
            }

            .article-card-excerpt {
                font-size: 13px;
                -webkit-line-clamp: 4;
            }

            .related-grid {
                grid-template-columns: repeat(2, 1fr);
                gap: 8px;
            }

            .related-card {
                padding: var(--spacing-sm);
            }

            .related-card-icon {
                font-size: 22px;
            }

            .related-card-name {
                font-size: 12px;
            }

            .pagination-btn {
                min-width: 36px;
                height: 36px;
                padding: 0 10px;
                font-size: 13px;
            }

            .section-heading h2 {
                font-size: 20px;
            }

            .btn {
                padding: 10px 18px;
                font-size: 14px;
            }

            .cta-card-content h3 {
                font-size: 20px;
            }

            .breadcrumb-bar {
                padding: 10px 0;
                font-size: 13px;
            }
        }

/* roulang page: category3 */
:root {
            --color-primary: #1E5B8F;
            --color-primary-dark: #16476E;
            --color-primary-light: #3A8BC2;
            --color-accent: #3A8BC2;
            --color-bg: #F7F9FB;
            --color-surface: #FFFFFF;
            --color-border: #E1E7EC;
            --color-border-light: #E8EEF3;
            --color-text-heading: #1A2B3C;
            --color-text-body: #2F3E4E;
            --color-text-muted: #6B7A8C;
            --color-text-white: #FFFFFF;
            --color-overlay-dark: rgba(26, 43, 60, 0.78);
            --color-bg-blue-tint: rgba(30, 91, 143, 0.06);
            --color-bg-blue-tint-strong: rgba(30, 91, 143, 0.12);
            --radius-sm: 8px;
            --radius-md: 12px;
            --radius-lg: 16px;
            --shadow-sm: 0 2px 8px rgba(26, 43, 60, 0.06);
            --shadow-md: 0 4px 14px rgba(26, 43, 60, 0.08);
            --shadow-lg: 0 6px 18px rgba(26, 43, 60, 0.12);
            --shadow-xl: 0 10px 28px rgba(26, 43, 60, 0.16);
            --font-family: "PingFang SC", "Microsoft YaHei", "Noto Sans SC", "Hiragino Sans GB", sans-serif;
            --max-width: 1200px;
            --spacing-sm: 12px;
            --spacing-md: 20px;
            --spacing-lg: 32px;
            --spacing-xl: 48px;
            --spacing-2xl: 72px;
            --spacing-3xl: 96px;
            --transition-fast: 0.2s ease;
            --transition-base: 0.3s ease;
            --transition-slow: 0.4s ease;
        }

        *,
        *::before,
        *::after {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
        }

        html {
            scroll-behavior: smooth;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
        }

        body {
            font-family: var(--font-family);
            font-size: 16px;
            line-height: 1.8;
            color: var(--color-text-body);
            background-color: var(--color-bg);
            min-height: 100vh;
        }

        img {
            max-width: 100%;
            height: auto;
            display: block;
        }

        a {
            color: var(--color-primary);
            text-decoration: none;
            transition: color var(--transition-fast);
        }
        a:hover {
            color: var(--color-primary-dark);
        }

        button,
        input {
            font-family: inherit;
            font-size: inherit;
            border: none;
            outline: none;
            background: none;
        }
        button {
            cursor: pointer;
        }

        .container {
            max-width: var(--max-width);
            margin: 0 auto;
            padding: 0 var(--spacing-md);
        }

        .section {
            padding: var(--spacing-2xl) 0;
        }

        .section-heading {
            margin-bottom: var(--spacing-lg);
        }
        .section-heading h2 {
            font-size: 28px;
            font-weight: 700;
            color: var(--color-text-heading);
            letter-spacing: 0.5px;
            position: relative;
            padding-bottom: var(--spacing-sm);
            display: inline-block;
            margin-bottom: 8px;
        }
        .section-heading h2::after {
            content: "";
            position: absolute;
            bottom: 0;
            left: 0;
            width: 48px;
            height: 3px;
            background: var(--color-primary);
            border-radius: 2px;
        }
        .section-heading .section-sub {
            font-size: 15px;
            color: var(--color-text-muted);
            max-width: 680px;
            line-height: 1.9;
        }

        /* ===== Header / Navigation ===== */
        .site-header {
            position: sticky;
            top: 0;
            z-index: 100;
            background: var(--color-surface);
            box-shadow: var(--shadow-sm);
            border-bottom: 1px solid var(--color-border-light);
            padding: 0;
        }
        .site-header .container {
            display: flex;
            align-items: center;
            justify-content: space-between;
            min-height: 72px;
            padding-top: 10px;
            padding-bottom: 10px;
            gap: var(--spacing-md);
        }
        .brand {
            display: flex;
            align-items: center;
            gap: 10px;
            flex-shrink: 0;
        }
        .brand-logo-mark {
            width: 40px;
            height: 40px;
            border-radius: var(--radius-sm);
            background: var(--color-primary);
            color: var(--color-text-white);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 20px;
            font-weight: 700;
            letter-spacing: 0;
            flex-shrink: 0;
        }
        .brand-name {
            font-size: 20px;
            font-weight: 700;
            color: var(--color-text-heading);
            letter-spacing: 0.5px;
            white-space: nowrap;
        }
        .nav-main {
            display: flex;
            align-items: center;
            gap: 8px;
            flex-wrap: nowrap;
            overflow-x: auto;
            scrollbar-width: thin;
            scrollbar-color: var(--color-border) transparent;
            -webkit-overflow-scrolling: touch;
        }
        .nav-main::-webkit-scrollbar {
            height: 4px;
        }
        .nav-main::-webkit-scrollbar-thumb {
            background: var(--color-border);
            border-radius: 2px;
        }
        .nav-card-item {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            padding: 8px 14px;
            border-radius: var(--radius-sm);
            background: var(--color-surface);
            color: var(--color-text-body);
            font-size: 14px;
            font-weight: 500;
            white-space: nowrap;
            border: 1px solid transparent;
            transition: all var(--transition-base);
            text-decoration: none;
        }
        .nav-card-item:hover {
            background: var(--color-bg-blue-tint);
            border-color: var(--color-border-light);
            color: var(--color-primary-dark);
            box-shadow: var(--shadow-sm);
        }
        .nav-card-item.active {
            background: var(--color-primary);
            color: var(--color-text-white);
            border-color: var(--color-primary);
            box-shadow: var(--shadow-md);
        }
        .nav-card-item .nav-icon {
            font-size: 16px;
            flex-shrink: 0;
        }
        .nav-actions {
            display: flex;
            align-items: center;
            gap: var(--spacing-sm);
            flex-shrink: 0;
        }
        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            padding: 10px 22px;
            border-radius: var(--radius-sm);
            font-size: 15px;
            font-weight: 600;
            letter-spacing: 0.3px;
            transition: all var(--transition-base);
            text-decoration: none;
            white-space: nowrap;
        }
        .btn-primary {
            background: var(--color-primary);
            color: var(--color-text-white);
            border: 2px solid var(--color-primary);
        }
        .btn-primary:hover {
            background: var(--color-primary-dark);
            border-color: var(--color-primary-dark);
            color: var(--color-text-white);
            box-shadow: var(--shadow-md);
            transform: translateY(-1px);
        }
        .btn-primary:focus-visible {
            outline: 2px solid rgba(30, 91, 143, 0.3);
            outline-offset: 2px;
        }
        .btn-primary:active {
            transform: translateY(0);
            box-shadow: var(--shadow-sm);
            background: var(--color-primary-dark);
        }
        .btn-outline {
            background: var(--color-surface);
            color: var(--color-primary);
            border: 2px solid var(--color-primary);
        }
        .btn-outline:hover {
            background: var(--color-bg-blue-tint);
            color: var(--color-primary-dark);
            border-color: var(--color-primary-dark);
            box-shadow: var(--shadow-sm);
        }
        .btn-outline:focus-visible {
            outline: 2px solid rgba(30, 91, 143, 0.3);
            outline-offset: 2px;
        }
        .btn-outline:active {
            background: var(--color-bg-blue-tint-strong);
        }
        .btn-sm {
            padding: 8px 16px;
            font-size: 13px;
        }
        .btn-lg {
            padding: 14px 28px;
            font-size: 16px;
        }
        .mobile-menu-toggle {
            display: none;
            width: 44px;
            height: 44px;
            border-radius: var(--radius-sm);
            border: 1px solid var(--color-border);
            background: var(--color-surface);
            align-items: center;
            justify-content: center;
            font-size: 22px;
            color: var(--color-text-heading);
            transition: all var(--transition-base);
            flex-shrink: 0;
        }
        .mobile-menu-toggle:hover {
            background: var(--color-bg-blue-tint);
            border-color: var(--color-primary-light);
        }
        .mobile-drawer {
            display: none;
            position: fixed;
            top: 0;
            right: -320px;
            width: 300px;
            height: 100vh;
            background: var(--color-surface);
            box-shadow: var(--shadow-xl);
            z-index: 200;
            padding: var(--spacing-lg);
            transition: right var(--transition-slow);
            overflow-y: auto;
            border-left: 1px solid var(--color-border);
        }
        .mobile-drawer.open {
            right: 0;
        }
        .mobile-drawer-close {
            width: 40px;
            height: 40px;
            border-radius: var(--radius-sm);
            border: 1px solid var(--color-border);
            background: var(--color-bg);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 20px;
            margin-bottom: var(--spacing-md);
            color: var(--color-text-heading);
            transition: all var(--transition-base);
        }
        .mobile-drawer-close:hover {
            background: var(--color-bg-blue-tint);
        }
        .mobile-drawer .nav-card-item {
            display: flex;
            width: 100%;
            padding: 12px 16px;
            margin-bottom: 6px;
            border: 1px solid var(--color-border-light);
        }
        .mobile-drawer .nav-actions {
            flex-direction: column;
            margin-top: var(--spacing-lg);
            gap: var(--spacing-sm);
        }
        .mobile-drawer .nav-actions .btn {
            width: 100%;
        }
        .drawer-overlay {
            display: none;
            position: fixed;
            inset: 0;
            background: rgba(26, 43, 60, 0.5);
            z-index: 150;
            opacity: 0;
            transition: opacity var(--transition-base);
        }
        .drawer-overlay.show {
            opacity: 1;
        }

        /* ===== Breadcrumb ===== */
        .breadcrumb-section {
            padding: var(--spacing-md) 0 0 0;
        }
        .breadcrumb {
            display: flex;
            align-items: center;
            gap: 8px;
            font-size: 14px;
            color: var(--color-text-muted);
            flex-wrap: wrap;
            list-style: none;
        }
        .breadcrumb li {
            display: flex;
            align-items: center;
            gap: 8px;
        }
        .breadcrumb li + li::before {
            content: ">";
            color: var(--color-border);
            font-size: 13px;
        }
        .breadcrumb a {
            color: var(--color-text-muted);
            transition: color var(--transition-fast);
        }
        .breadcrumb a:hover {
            color: var(--color-primary);
        }
        .breadcrumb .current {
            color: var(--color-primary);
            font-weight: 600;
        }

        /* ===== Category Hero ===== */
        .category-hero {
            padding: var(--spacing-xl) 0 var(--spacing-lg);
            position: relative;
            overflow: hidden;
        }
        .category-hero .container {
            position: relative;
            z-index: 2;
        }
        .category-hero-content {
            display: grid;
            grid-template-columns: 1.2fr 0.8fr;
            gap: var(--spacing-xl);
            align-items: center;
            background: var(--color-surface);
            border-radius: var(--radius-lg);
            border: 1px solid var(--color-border);
            box-shadow: var(--shadow-md);
            padding: var(--spacing-xl);
        }
        .category-hero-text h1 {
            font-size: 36px;
            font-weight: 700;
            color: var(--color-text-heading);
            letter-spacing: 0.5px;
            margin-bottom: var(--spacing-md);
            line-height: 1.3;
        }
        .category-hero-text h1::after {
            content: "";
            display: block;
            width: 48px;
            height: 3px;
            background: var(--color-primary);
            border-radius: 2px;
            margin-top: 12px;
        }
        .category-hero-text .hero-desc {
            font-size: 15px;
            color: var(--color-text-muted);
            line-height: 1.9;
            max-width: 620px;
        }
        .category-hero-meta {
            display: flex;
            gap: var(--spacing-md);
            margin-top: var(--spacing-md);
            flex-wrap: wrap;
        }
        .hero-meta-badge {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            padding: 6px 14px;
            border-radius: 50px;
            background: var(--color-bg-blue-tint);
            color: var(--color-primary);
            font-size: 13px;
            font-weight: 500;
        }
        .category-hero-image {
            border-radius: var(--radius-md);
            overflow: hidden;
            box-shadow: var(--shadow-lg);
            aspect-ratio: 4 / 3;
            background: var(--color-bg-blue-tint);
            position: relative;
        }
        .category-hero-image img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            display: block;
        }
        .category-hero-image .image-caption {
            position: absolute;
            bottom: 0;
            left: 0;
            right: 0;
            padding: var(--spacing-sm) var(--spacing-md);
            background: rgba(26, 43, 60, 0.72);
            color: var(--color-text-white);
            font-size: 12px;
            letter-spacing: 0.3px;
        }

        /* ===== Timeline Layout ===== */
        .timeline-section {
            padding-top: var(--spacing-lg);
        }
        .timeline-container {
            position: relative;
            padding-left: 120px;
            max-width: 900px;
        }
        .timeline-container::before {
            content: "";
            position: absolute;
            left: 58px;
            top: 0;
            bottom: 0;
            width: 3px;
            background: linear-gradient(to bottom, var(--color-primary), var(--color-primary-light), var(--color-border-light));
            border-radius: 2px;
        }
        .timeline-item {
            position: relative;
            margin-bottom: var(--spacing-lg);
        }
        .timeline-item::before {
            content: "";
            position: absolute;
            left: -74px;
            top: 24px;
            width: 14px;
            height: 14px;
            border-radius: 50%;
            background: var(--color-primary);
            border: 3px solid var(--color-surface);
            box-shadow: 0 0 0 3px var(--color-primary-light), 0 2px 8px rgba(26, 43, 60, 0.18);
            z-index: 2;
        }
        .timeline-date {
            position: absolute;
            left: -120px;
            top: 16px;
            width: 88px;
            text-align: right;
            font-size: 14px;
            font-weight: 600;
            color: var(--color-primary);
            letter-spacing: 0.5px;
            white-space: nowrap;
        }
        .timeline-card {
            background: var(--color-surface);
            border-radius: var(--radius-md);
            border: 1px solid var(--color-border);
            box-shadow: var(--shadow-sm);
            padding: var(--spacing-lg);
            transition: all var(--transition-base);
        }
        .timeline-card:hover {
            box-shadow: var(--shadow-lg);
            transform: translateY(-2px);
            border-color: var(--color-primary-light);
        }
        .timeline-card .card-category-tag {
            display: inline-block;
            padding: 4px 12px;
            border-radius: 50px;
            background: var(--color-bg-blue-tint);
            color: var(--color-primary);
            font-size: 12px;
            font-weight: 600;
            letter-spacing: 0.5px;
            margin-bottom: var(--spacing-sm);
        }
        .timeline-card h3 {
            font-size: 20px;
            font-weight: 700;
            color: var(--color-text-heading);
            margin-bottom: var(--spacing-sm);
            line-height: 1.5;
        }
        .timeline-card h3 a {
            color: var(--color-text-heading);
            transition: color var(--transition-fast);
        }
        .timeline-card h3 a:hover {
            color: var(--color-primary);
        }
        .timeline-card .card-summary {
            font-size: 15px;
            color: var(--color-text-muted);
            line-height: 1.9;
            margin-bottom: var(--spacing-sm);
        }
        .timeline-card .card-footer {
            display: flex;
            align-items: center;
            justify-content: space-between;
            flex-wrap: wrap;
            gap: var(--spacing-sm);
        }
        .timeline-card .card-date-badge {
            font-size: 12px;
            color: var(--color-text-muted);
            background: var(--color-bg);
            padding: 4px 10px;
            border-radius: 4px;
        }
        .read-more-link {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            font-size: 14px;
            font-weight: 600;
            color: var(--color-primary);
            transition: all var(--transition-base);
            padding: 4px 0;
        }
        .read-more-link .arrow {
            transition: transform var(--transition-base);
        }
        .read-more-link:hover {
            color: var(--color-primary-dark);
        }
        .read-more-link:hover .arrow {
            transform: translateX(4px);
        }
        .timeline-card.with-image {
            display: grid;
            grid-template-columns: 180px 1fr;
            gap: var(--spacing-lg);
            align-items: start;
        }
        .timeline-card .card-image {
            border-radius: var(--radius-sm);
            overflow: hidden;
            aspect-ratio: 16 / 10;
            background: var(--color-bg-blue-tint);
        }
        .timeline-card .card-image img {
            width: 100%;
            height: 100%;
            object-fit: cover;
        }
        .timeline-card .card-content {
            flex: 1;
        }

        /* ===== Load More ===== */
        .load-more-section {
            padding: var(--spacing-sm) 0 var(--spacing-xl);
            text-align: center;
        }
        .load-more-section .btn {
            min-width: 200px;
        }

        /* ===== Related Categories ===== */
        .related-categories {
            background: var(--color-bg-blue-tint);
            border-radius: var(--radius-lg);
            padding: var(--spacing-xl);
            border: 1px solid var(--color-border-light);
        }
        .related-categories h2 {
            font-size: 22px;
            font-weight: 700;
            color: var(--color-text-heading);
            margin-bottom: var(--spacing-lg);
            position: relative;
            padding-bottom: var(--spacing-sm);
        }
        .related-categories h2::after {
            content: "";
            position: absolute;
            bottom: 0;
            left: 0;
            width: 36px;
            height: 3px;
            background: var(--color-primary);
            border-radius: 2px;
        }
        .related-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: var(--spacing-md);
        }
        .related-card {
            background: var(--color-surface);
            border-radius: var(--radius-md);
            border: 1px solid var(--color-border);
            box-shadow: var(--shadow-sm);
            padding: var(--spacing-md);
            transition: all var(--transition-base);
            text-decoration: none;
            display: flex;
            align-items: center;
            gap: var(--spacing-sm);
        }
        .related-card:hover {
            box-shadow: var(--shadow-lg);
            transform: translateY(-2px);
            border-color: var(--color-primary-light);
        }
        .related-card .related-icon {
            width: 40px;
            height: 40px;
            border-radius: var(--radius-sm);
            background: var(--color-bg-blue-tint);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 18px;
            flex-shrink: 0;
        }
        .related-card .related-info h4 {
            font-size: 15px;
            font-weight: 600;
            color: var(--color-text-heading);
        }
        .related-card .related-info p {
            font-size: 13px;
            color: var(--color-text-muted);
            margin-top: 2px;
        }

        /* ===== FAQ ===== */
        .faq-container {
            max-width: 820px;
            margin: 0 auto;
        }
        .faq-item {
            background: var(--color-surface);
            border-radius: var(--radius-md);
            border: 1px solid var(--color-border);
            box-shadow: var(--shadow-sm);
            margin-bottom: var(--spacing-sm);
            overflow: hidden;
            transition: all var(--transition-base);
        }
        .faq-item:hover {
            box-shadow: var(--shadow-md);
        }
        .faq-question {
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: var(--spacing-sm);
            padding: var(--spacing-md) var(--spacing-lg);
            font-size: 16px;
            font-weight: 600;
            color: var(--color-text-heading);
            cursor: pointer;
            width: 100%;
            text-align: left;
            transition: color var(--transition-fast);
            user-select: none;
            background: transparent;
        }
        .faq-question:hover {
            color: var(--color-primary);
        }
        .faq-question .faq-icon {
            flex-shrink: 0;
            width: 28px;
            height: 28px;
            border-radius: 50%;
            background: var(--color-bg-blue-tint);
            color: var(--color-primary);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 16px;
            font-weight: 700;
            transition: all var(--transition-base);
        }
        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height var(--transition-slow);
            padding: 0 var(--spacing-lg);
        }
        .faq-answer-inner {
            padding: 0 0 var(--spacing-md);
            font-size: 15px;
            color: var(--color-text-muted);
            line-height: 1.9;
        }
        .faq-item.open .faq-question .faq-icon {
            transform: rotate(45deg);
            background: var(--color-primary);
            color: var(--color-text-white);
        }
        .faq-item.open .faq-answer {
            max-height: 400px;
        }
        .faq-item.open {
            border-color: var(--color-primary-light);
            box-shadow: var(--shadow-md);
        }

        /* ===== CTA / Subscribe ===== */
        .cta-section {
            padding-top: var(--spacing-sm);
        }
        .cta-card {
            background: var(--color-bg-blue-tint-strong);
            border-radius: var(--radius-lg);
            padding: var(--spacing-xl);
            border: 1px solid var(--color-border-light);
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: var(--spacing-xl);
            align-items: center;
        }
        .cta-text h2 {
            font-size: 26px;
            font-weight: 700;
            color: var(--color-text-heading);
            margin-bottom: var(--spacing-sm);
        }
        .cta-text p {
            font-size: 15px;
            color: var(--color-text-muted);
            line-height: 1.9;
        }
        .subscribe-form-card {
            background: var(--color-surface);
            border-radius: var(--radius-md);
            padding: var(--spacing-lg);
            border: 1px solid var(--color-border);
            box-shadow: var(--shadow-md);
        }
        .subscribe-form-card h3 {
            font-size: 18px;
            font-weight: 700;
            color: var(--color-text-heading);
            margin-bottom: var(--spacing-sm);
        }
        .subscribe-form {
            display: flex;
            gap: var(--spacing-sm);
            flex-wrap: wrap;
        }
        .subscribe-form input[type="email"] {
            flex: 1;
            min-width: 200px;
            padding: 12px 16px;
            border-radius: var(--radius-sm);
            border: 1px solid #D9DFE6;
            font-size: 15px;
            color: var(--color-text-body);
            background: var(--color-surface);
            transition: border-color var(--transition-fast);
        }
        .subscribe-form input[type="email"]:focus {
            border-color: var(--color-primary);
            outline: none;
            box-shadow: 0 0 0 3px rgba(30, 91, 143, 0.1);
        }
        .subscribe-form .btn {
            flex-shrink: 0;
        }
        .form-privacy {
            font-size: 12px;
            color: var(--color-text-muted);
            margin-top: var(--spacing-sm);
            display: flex;
            align-items: center;
            gap: 6px;
        }

        /* ===== Footer ===== */
        .site-footer {
            background: #1A2B3C;
            color: rgba(255, 255, 255, 0.75);
            padding: var(--spacing-2xl) 0 0;
            margin-top: var(--spacing-2xl);
        }
        .site-footer .container {
            padding-bottom: var(--spacing-lg);
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 1.5fr 1fr 1fr 1fr;
            gap: var(--spacing-xl);
            padding-bottom: var(--spacing-xl);
            border-bottom: 1px solid rgba(255, 255, 255, 0.1);
        }
        .footer-brand .brand-name {
            color: var(--color-text-white);
            font-size: 20px;
            font-weight: 700;
            display: block;
            margin-bottom: var(--spacing-sm);
        }
        .footer-brand p {
            font-size: 14px;
            line-height: 1.8;
            color: rgba(255, 255, 255, 0.6);
        }
        .footer-col h4 {
            font-size: 15px;
            font-weight: 600;
            color: var(--color-text-white);
            margin-bottom: var(--spacing-sm);
            letter-spacing: 0.5px;
        }
        .footer-col ul {
            list-style: none;
            padding: 0;
        }
        .footer-col ul li {
            margin-bottom: 8px;
        }
        .footer-col ul li a {
            color: rgba(255, 255, 255, 0.6);
            font-size: 14px;
            transition: color var(--transition-fast);
            text-decoration: none;
        }
        .footer-col ul li a:hover {
            color: rgba(255, 255, 255, 0.9);
        }
        .footer-bottom {
            padding: var(--spacing-lg) 0;
            display: flex;
            align-items: center;
            flex-wrap: wrap;
            gap: var(--spacing-sm) var(--spacing-md);
            font-size: 13px;
            color: rgba(255, 255, 255, 0.5);
        }
        .footer-bottom-links {
            display: flex;
            align-items: center;
            gap: var(--spacing-sm);
            margin-left: auto;
        }
        .footer-bottom-links a {
            color: rgba(255, 255, 255, 0.5);
            font-size: 13px;
            transition: color var(--transition-fast);
        }
        .footer-bottom-links a:hover {
            color: rgba(255, 255, 255, 0.85);
        }

        /* ===== Responsive ===== */
        @media (max-width: 1024px) {
            .category-hero-content {
                grid-template-columns: 1fr;
                gap: var(--spacing-md);
            }
            .category-hero-image {
                max-height: 320px;
            }
            .footer-grid {
                grid-template-columns: 1fr 1fr;
                gap: var(--spacing-lg);
            }
            .timeline-container {
                padding-left: 80px;
            }
            .timeline-container::before {
                left: 38px;
            }
            .timeline-item::before {
                left: -54px;
            }
            .timeline-date {
                left: -80px;
                width: 60px;
                font-size: 12px;
            }
            .related-grid {
                grid-template-columns: repeat(2, 1fr);
            }
        }
        @media (max-width: 768px) {
            .nav-main {
                display: none;
            }
            .nav-actions {
                display: none;
            }
            .mobile-menu-toggle {
                display: flex;
            }
            .mobile-drawer {
                display: block;
            }
            .drawer-overlay {
                display: block;
            }
            .category-hero {
                padding: var(--spacing-lg) 0;
            }
            .category-hero-content {
                padding: var(--spacing-lg);
            }
            .category-hero-text h1 {
                font-size: 28px;
            }
            .timeline-container {
                padding-left: 32px;
            }
            .timeline-container::before {
                left: 10px;
            }
            .timeline-item::before {
                left: -28px;
                top: 18px;
                width: 10px;
                height: 10px;
                box-shadow: 0 0 0 2px var(--color-primary-light);
            }
            .timeline-date {
                position: static;
                text-align: left;
                width: auto;
                margin-bottom: var(--spacing-sm);
                display: block;
                font-size: 13px;
            }
            .timeline-card.with-image {
                grid-template-columns: 1fr;
                gap: var(--spacing-sm);
            }
            .timeline-card .card-image {
                max-height: 200px;
            }
            .timeline-card {
                padding: var(--spacing-md);
            }
            .timeline-card h3 {
                font-size: 17px;
            }
            .related-grid {
                grid-template-columns: 1fr;
            }
            .cta-card {
                grid-template-columns: 1fr;
                padding: var(--spacing-lg);
            }
            .footer-grid {
                grid-template-columns: 1fr;
                gap: var(--spacing-md);
            }
            .footer-bottom {
                flex-direction: column;
                align-items: flex-start;
            }
            .footer-bottom-links {
                margin-left: 0;
            }
            .section {
                padding: var(--spacing-xl) 0;
            }
            .section-heading h2 {
                font-size: 22px;
            }
        }
        @media (max-width: 520px) {
            .category-hero-text h1 {
                font-size: 24px;
            }
            .category-hero-content {
                padding: var(--spacing-md);
            }
            .subscribe-form {
                flex-direction: column;
            }
            .subscribe-form input[type="email"] {
                width: 100%;
            }
            .subscribe-form .btn {
                width: 100%;
            }
            .container {
                padding: 0 16px;
            }
            .timeline-container {
                padding-left: 28px;
            }
            .timeline-container::before {
                left: 8px;
            }
            .timeline-item::before {
                left: -24px;
            }
        }

/* roulang page: category4 */
:root {
            --color-primary: #1E5B8F;
            --color-primary-dark: #16476E;
            --color-primary-light: #3A8BC2;
            --color-accent: #3A8BC2;
            --color-bg: #F7F9FB;
            --color-surface: #FFFFFF;
            --color-border: #E1E7EC;
            --color-border-light: #E8EEF3;
            --color-text-heading: #1A2B3C;
            --color-text-body: #2F3E4E;
            --color-text-muted: #6B7A8C;
            --color-text-white: #FFFFFF;
            --color-overlay-dark: rgba(26, 43, 60, 0.78);
            --color-bg-blue-tint: rgba(30, 91, 143, 0.06);
            --color-bg-blue-tint-strong: rgba(30, 91, 143, 0.12);
            --radius-sm: 8px;
            --radius-md: 12px;
            --radius-lg: 16px;
            --shadow-sm: 0 2px 8px rgba(26, 43, 60, 0.06);
            --shadow-md: 0 4px 14px rgba(26, 43, 60, 0.08);
            --shadow-lg: 0 6px 18px rgba(26, 43, 60, 0.12);
            --shadow-xl: 0 10px 28px rgba(26, 43, 60, 0.16);
            --font-family: "PingFang SC", "Microsoft YaHei", "Noto Sans SC", "Hiragino Sans GB", sans-serif;
            --max-width: 1200px;
            --spacing-sm: 12px;
            --spacing-md: 20px;
            --spacing-lg: 32px;
            --spacing-xl: 48px;
            --spacing-2xl: 72px;
            --spacing-3xl: 96px;
            --transition-fast: 0.2s ease;
            --transition-base: 0.3s ease;
            --transition-slow: 0.4s ease;
        }

        * {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
        }

        html {
            scroll-behavior: smooth;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
        }

        body {
            font-family: var(--font-family);
            font-size: 16px;
            line-height: 1.8;
            color: var(--color-text-body);
            background-color: var(--color-bg);
            min-height: 100vh;
        }

        img {
            max-width: 100%;
            height: auto;
            display: block;
        }

        a {
            color: var(--color-primary);
            text-decoration: none;
            transition: color var(--transition-fast);
        }

        a:hover {
            color: var(--color-primary-dark);
        }

        button,
        input {
            font-family: inherit;
            font-size: inherit;
            border: none;
            outline: none;
            background: none;
        }

        button {
            cursor: pointer;
        }

        ul,
        ol {
            list-style: none;
        }

        .container {
            max-width: var(--max-width);
            margin: 0 auto;
            padding: 0 var(--spacing-md);
        }

        .section {
            padding: var(--spacing-2xl) 0;
        }

        .section-sm {
            padding: var(--spacing-xl) 0;
        }

        .section-heading {
            margin-bottom: var(--spacing-lg);
        }

        .section-heading h2 {
            font-size: 28px;
            font-weight: 700;
            color: var(--color-text-heading);
            letter-spacing: 0.5px;
            position: relative;
            padding-bottom: var(--spacing-sm);
            display: inline-block;
            margin-bottom: 8px;
        }

        .section-heading h2::after {
            content: "";
            position: absolute;
            bottom: 0;
            left: 0;
            width: 48px;
            height: 3px;
            background: var(--color-primary);
            border-radius: 2px;
        }

        .section-heading .section-sub {
            font-size: 15px;
            color: var(--color-text-muted);
            max-width: 680px;
            line-height: 1.9;
            margin-top: var(--spacing-sm);
        }

        /* ===== Header / Navigation ===== */
        .site-header {
            position: sticky;
            top: 0;
            z-index: 100;
            background: var(--color-surface);
            box-shadow: var(--shadow-sm);
            border-bottom: 1px solid var(--color-border-light);
            padding: 0;
        }

        .site-header .container {
            display: flex;
            align-items: center;
            justify-content: space-between;
            min-height: 72px;
            padding-top: 10px;
            padding-bottom: 10px;
            gap: var(--spacing-md);
        }

        .brand {
            display: flex;
            align-items: center;
            gap: 10px;
            flex-shrink: 0;
        }

        .brand-logo-mark {
            width: 40px;
            height: 40px;
            border-radius: var(--radius-sm);
            background: var(--color-primary);
            color: var(--color-text-white);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 20px;
            font-weight: 700;
            letter-spacing: 0;
            flex-shrink: 0;
        }

        .brand-name {
            font-size: 20px;
            font-weight: 700;
            color: var(--color-text-heading);
            letter-spacing: 0.5px;
            white-space: nowrap;
        }

        .nav-main {
            display: flex;
            align-items: center;
            gap: 6px;
            flex-wrap: nowrap;
            overflow-x: auto;
            scrollbar-width: thin;
            scrollbar-color: var(--color-border) transparent;
            -webkit-overflow-scrolling: touch;
        }

        .nav-main::-webkit-scrollbar {
            height: 4px;
        }

        .nav-main::-webkit-scrollbar-thumb {
            background: var(--color-border);
            border-radius: 2px;
        }

        .nav-card-item {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            padding: 8px 14px;
            border-radius: var(--radius-sm);
            background: var(--color-bg);
            color: var(--color-text-body);
            font-size: 14px;
            font-weight: 500;
            white-space: nowrap;
            transition: background var(--transition-fast), color var(--transition-fast), box-shadow var(--transition-fast);
            border: 1px solid transparent;
        }

        .nav-card-item:hover {
            background: var(--color-bg-blue-tint);
            color: var(--color-primary);
        }

        .nav-card-item.active {
            background: var(--color-primary);
            color: var(--color-text-white);
            border-color: var(--color-primary);
            box-shadow: var(--shadow-sm);
        }

        .nav-icon {
            font-size: 16px;
            line-height: 1;
        }

        .nav-cta-group {
            display: flex;
            align-items: center;
            gap: 8px;
            flex-shrink: 0;
        }

        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 6px;
            padding: 10px 20px;
            border-radius: var(--radius-sm);
            font-size: 15px;
            font-weight: 600;
            line-height: 1.5;
            transition: all var(--transition-fast);
            white-space: nowrap;
        }

        .btn-primary {
            background: var(--color-primary);
            color: var(--color-text-white);
            border: 1px solid var(--color-primary);
        }

        .btn-primary:hover {
            background: var(--color-primary-dark);
            border-color: var(--color-primary-dark);
            color: var(--color-text-white);
            box-shadow: var(--shadow-md);
        }

        .btn-primary:active {
            box-shadow: none;
            transform: translateY(1px);
        }

        .btn-secondary {
            background: var(--color-surface);
            color: var(--color-primary);
            border: 1px solid var(--color-primary);
        }

        .btn-secondary:hover {
            background: var(--color-bg-blue-tint);
            border-color: var(--color-primary-dark);
            color: var(--color-primary-dark);
        }

        .btn-secondary:active {
            background: var(--color-bg-blue-tint-strong);
            transform: translateY(1px);
        }

        .btn:focus-visible,
        .nav-card-item:focus-visible,
        a:focus-visible {
            outline: 2px solid rgba(30, 91, 143, 0.35);
            outline-offset: 2px;
            border-radius: var(--radius-sm);
        }

        .hamburger {
            display: none;
            flex-direction: column;
            gap: 5px;
            padding: 8px;
            border-radius: var(--radius-sm);
            background: var(--color-bg);
            border: 1px solid var(--color-border);
            transition: background var(--transition-fast);
        }

        .hamburger:hover {
            background: var(--color-bg-blue-tint);
        }

        .hamburger span {
            display: block;
            width: 22px;
            height: 2px;
            background: var(--color-text-heading);
            border-radius: 2px;
            transition: transform var(--transition-base), opacity var(--transition-fast);
        }

        .hamburger.open span:nth-child(1) {
            transform: translateY(7px) rotate(45deg);
        }

        .hamburger.open span:nth-child(2) {
            opacity: 0;
        }

        .hamburger.open span:nth-child(3) {
            transform: translateY(-7px) rotate(-45deg);
        }

        .mobile-drawer {
            display: none;
            position: fixed;
            top: 72px;
            left: 0;
            right: 0;
            bottom: 0;
            background: var(--color-surface);
            z-index: 99;
            padding: var(--spacing-md);
            overflow-y: auto;
            box-shadow: var(--shadow-xl);
            border-top: 1px solid var(--color-border-light);
        }

        .mobile-drawer.open {
            display: block;
        }

        .mobile-drawer .nav-card-item {
            display: flex;
            width: 100%;
            padding: 14px 16px;
            font-size: 16px;
            margin-bottom: 4px;
            border-radius: var(--radius-sm);
        }

        .mobile-drawer .nav-cta-group {
            flex-direction: column;
            gap: var(--spacing-sm);
            margin-top: var(--spacing-lg);
        }

        .mobile-drawer .nav-cta-group .btn {
            width: 100%;
        }

        /* ===== Breadcrumb ===== */
        .breadcrumb-bar {
            background: var(--color-surface);
            border-bottom: 1px solid var(--color-border-light);
            padding: 14px 0;
        }

        .breadcrumb {
            display: flex;
            align-items: center;
            gap: 8px;
            font-size: 14px;
            color: var(--color-text-muted);
            flex-wrap: wrap;
        }

        .breadcrumb a {
            color: var(--color-text-muted);
            transition: color var(--transition-fast);
        }

        .breadcrumb a:hover {
            color: var(--color-primary);
        }

        .breadcrumb .sep {
            color: var(--color-border);
            user-select: none;
        }

        .breadcrumb .current {
            color: var(--color-primary);
            font-weight: 600;
        }

        /* ===== Category Hero ===== */
        .category-hero {
            background: var(--color-surface);
            border-bottom: 1px solid var(--color-border-light);
            padding: var(--spacing-xl) 0;
        }

        .category-hero .container {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: var(--spacing-2xl);
            align-items: center;
        }

        .category-hero-content h1 {
            font-size: 38px;
            font-weight: 700;
            color: var(--color-text-heading);
            letter-spacing: 0.5px;
            line-height: 1.3;
            margin-bottom: var(--spacing-md);
            position: relative;
            padding-bottom: var(--spacing-md);
        }

        .category-hero-content h1::after {
            content: "";
            position: absolute;
            bottom: 0;
            left: 0;
            width: 48px;
            height: 3px;
            background: var(--color-primary);
            border-radius: 2px;
        }

        .category-hero-content .hero-desc {
            font-size: 16px;
            color: var(--color-text-body);
            line-height: 1.9;
            margin-bottom: var(--spacing-lg);
        }

        .category-hero-meta {
            display: flex;
            gap: var(--spacing-lg);
            flex-wrap: wrap;
        }

        .hero-meta-item {
            display: flex;
            flex-direction: column;
            gap: 2px;
        }

        .hero-meta-item .meta-label {
            font-size: 12px;
            color: var(--color-text-muted);
            text-transform: uppercase;
            letter-spacing: 0.5px;
        }

        .hero-meta-item .meta-value {
            font-size: 16px;
            font-weight: 700;
            color: var(--color-primary);
        }

        .category-hero-image {
            position: relative;
            border-radius: var(--radius-lg);
            overflow: hidden;
            box-shadow: var(--shadow-lg);
            aspect-ratio: 4 / 3;
        }

        .category-hero-image img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform var(--transition-slow);
        }

        .category-hero-image:hover img {
            transform: scale(1.03);
        }

        .category-hero-image .image-badge {
            position: absolute;
            bottom: 16px;
            left: 16px;
            background: var(--color-surface);
            color: var(--color-primary);
            padding: 6px 14px;
            border-radius: 20px;
            font-size: 13px;
            font-weight: 600;
            box-shadow: var(--shadow-md);
        }

        /* ===== Featured Article ===== */
        .featured-article {
            padding: var(--spacing-2xl) 0;
        }

        .featured-article-card {
            background: var(--color-surface);
            border-radius: var(--radius-lg);
            border: 1px solid var(--color-border);
            box-shadow: var(--shadow-md);
            overflow: hidden;
        }

        .featured-article-card .article-image-container {
            position: relative;
            width: 100%;
            aspect-ratio: 16 / 7;
            overflow: hidden;
        }

        .featured-article-card .article-image-container img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform var(--transition-slow);
        }

        .featured-article-card:hover .article-image-container img {
            transform: scale(1.02);
        }

        .featured-article-card .article-tag {
            position: absolute;
            top: 20px;
            left: 24px;
            background: var(--color-primary);
            color: var(--color-text-white);
            padding: 4px 14px;
            border-radius: 20px;
            font-size: 13px;
            font-weight: 600;
            letter-spacing: 0.5px;
        }

        .featured-article-content {
            padding: var(--spacing-xl) var(--spacing-2xl);
        }

        .featured-article-content .article-date {
            font-size: 13px;
            color: var(--color-text-muted);
            margin-bottom: var(--spacing-sm);
            display: flex;
            align-items: center;
            gap: 8px;
        }

        .featured-article-content h2 {
            font-size: 26px;
            font-weight: 700;
            color: var(--color-text-heading);
            line-height: 1.4;
            margin-bottom: var(--spacing-md);
            letter-spacing: 0.3px;
        }

        .featured-article-content .article-excerpt {
            font-size: 15px;
            color: var(--color-text-body);
            line-height: 1.9;
            margin-bottom: var(--spacing-lg);
        }

        .featured-article-content .article-excerpt p {
            margin-bottom: var(--spacing-md);
        }

        .article-meta-row {
            display: flex;
            align-items: center;
            gap: var(--spacing-md);
            flex-wrap: wrap;
            padding-top: var(--spacing-md);
            border-top: 1px solid var(--color-border-light);
        }

        .article-meta-row .meta-dot {
            width: 4px;
            height: 4px;
            border-radius: 50%;
            background: var(--color-border);
        }

        .article-meta-row .article-read-more {
            margin-left: auto;
        }

        /* ===== Small Article Cards ===== */
        .small-articles {
            padding-bottom: var(--spacing-2xl);
        }

        .small-articles-grid {
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: var(--spacing-lg);
        }

        .small-article-card {
            background: var(--color-surface);
            border-radius: var(--radius-md);
            border: 1px solid var(--color-border);
            box-shadow: var(--shadow-sm);
            overflow: hidden;
            display: flex;
            flex-direction: column;
            transition: box-shadow var(--transition-base), transform var(--transition-base);
        }

        .small-article-card:hover {
            box-shadow: var(--shadow-lg);
            transform: translateY(-3px);
        }

        .small-article-card .card-image {
            width: 100%;
            aspect-ratio: 16 / 9;
            overflow: hidden;
        }

        .small-article-card .card-image img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform var(--transition-slow);
        }

        .small-article-card:hover .card-image img {
            transform: scale(1.05);
        }

        .small-article-card .card-content {
            padding: var(--spacing-lg);
            display: flex;
            flex-direction: column;
            gap: var(--spacing-sm);
            flex: 1;
        }

        .small-article-card .card-date {
            font-size: 12px;
            color: var(--color-text-muted);
        }

        .small-article-card h3 {
            font-size: 17px;
            font-weight: 700;
            color: var(--color-text-heading);
            line-height: 1.5;
            letter-spacing: 0.2px;
        }

        .small-article-card .card-excerpt {
            font-size: 14px;
            color: var(--color-text-muted);
            line-height: 1.7;
            flex: 1;
        }

        .small-article-card .card-link {
            font-size: 14px;
            font-weight: 600;
            color: var(--color-primary);
            display: inline-flex;
            align-items: center;
            gap: 4px;
            transition: color var(--transition-fast), gap var(--transition-fast);
        }

        .small-article-card .card-link:hover {
            color: var(--color-primary-dark);
            gap: 8px;
        }

        /* ===== Data Highlights ===== */
        .data-highlights {
            background: var(--color-bg-blue-tint);
            padding: var(--spacing-2xl) 0;
            border-top: 1px solid var(--color-border-light);
            border-bottom: 1px solid var(--color-border-light);
        }

        .data-strip {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: var(--spacing-lg);
        }

        .data-card {
            background: var(--color-surface);
            border-radius: var(--radius-md);
            border: 1px solid var(--color-border);
            box-shadow: var(--shadow-sm);
            padding: var(--spacing-lg);
            text-align: center;
            transition: box-shadow var(--transition-base), transform var(--transition-base);
        }

        .data-card:hover {
            box-shadow: var(--shadow-md);
            transform: translateY(-2px);
        }

        .data-card .data-number {
            font-size: 36px;
            font-weight: 700;
            color: var(--color-primary);
            letter-spacing: 0.5px;
            line-height: 1.2;
            margin-bottom: var(--spacing-sm);
        }

        .data-card .data-unit {
            font-size: 14px;
            color: var(--color-accent);
            font-weight: 600;
            margin-left: 2px;
        }

        .data-card .data-label {
            font-size: 14px;
            color: var(--color-text-muted);
            line-height: 1.6;
        }

        /* ===== Insight Dimension ===== */
        .insight-dimension {
            padding: var(--spacing-2xl) 0;
        }

        .dimension-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: var(--spacing-lg);
        }

        .dimension-card {
            background: var(--color-surface);
            border-radius: var(--radius-md);
            border: 1px solid var(--color-border);
            box-shadow: var(--shadow-sm);
            padding: var(--spacing-lg);
            transition: box-shadow var(--transition-base), transform var(--transition-base), border-color var(--transition-fast);
        }

        .dimension-card:hover {
            box-shadow: var(--shadow-md);
            transform: translateY(-2px);
            border-color: var(--color-border-light);
        }

        .dimension-icon {
            width: 44px;
            height: 44px;
            border-radius: var(--radius-sm);
            background: var(--color-bg-blue-tint);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 22px;
            margin-bottom: var(--spacing-sm);
        }

        .dimension-card h3 {
            font-size: 18px;
            font-weight: 700;
            color: var(--color-text-heading);
            margin-bottom: var(--spacing-sm);
            letter-spacing: 0.3px;
        }

        .dimension-card p {
            font-size: 14px;
            color: var(--color-text-muted);
            line-height: 1.8;
        }

        /* ===== Related Categories ===== */
        .related-categories {
            background: var(--color-surface);
            border-top: 1px solid var(--color-border-light);
            border-bottom: 1px solid var(--color-border-light);
            padding: var(--spacing-2xl) 0;
        }

        .related-cat-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: var(--spacing-lg);
        }

        .related-cat-card {
            background: var(--color-bg);
            border-radius: var(--radius-md);
            border: 1px solid var(--color-border);
            padding: var(--spacing-lg);
            transition: box-shadow var(--transition-base), transform var(--transition-base), background var(--transition-fast);
            display: flex;
            flex-direction: column;
            gap: var(--spacing-sm);
        }

        .related-cat-card:hover {
            box-shadow: var(--shadow-md);
            transform: translateY(-2px);
            background: var(--color-surface);
        }

        .related-cat-card .cat-icon {
            font-size: 24px;
            margin-bottom: 4px;
        }

        .related-cat-card h3 {
            font-size: 17px;
            font-weight: 700;
            color: var(--color-text-heading);
            letter-spacing: 0.2px;
        }

        .related-cat-card p {
            font-size: 13px;
            color: var(--color-text-muted);
            line-height: 1.7;
            flex: 1;
        }

        .related-cat-card .cat-link {
            font-size: 14px;
            font-weight: 600;
            color: var(--color-primary);
            display: inline-flex;
            align-items: center;
            gap: 4px;
        }

        .related-cat-card .cat-link:hover {
            color: var(--color-primary-dark);
            gap: 8px;
        }

        /* ===== FAQ ===== */
        .faq-section {
            padding: var(--spacing-2xl) 0;
        }

        .faq-list {
            display: flex;
            flex-direction: column;
            gap: var(--spacing-md);
            max-width: 800px;
        }

        .faq-item {
            background: var(--color-surface);
            border-radius: var(--radius-md);
            border: 1px solid var(--color-border);
            box-shadow: var(--shadow-sm);
            overflow: hidden;
            transition: box-shadow var(--transition-base);
        }

        .faq-item:hover {
            box-shadow: var(--shadow-md);
        }

        .faq-item.open {
            border-color: var(--color-primary-light);
            box-shadow: var(--shadow-md);
        }

        .faq-question {
            display: flex;
            align-items: center;
            gap: var(--spacing-md);
            padding: var(--spacing-lg);
            cursor: pointer;
            user-select: none;
            transition: background var(--transition-fast);
        }

        .faq-question:hover {
            background: var(--color-bg-blue-tint);
        }

        .faq-question .faq-icon {
            width: 28px;
            height: 28px;
            border-radius: 50%;
            background: var(--color-bg-blue-tint);
            display: flex;
            align-items: center;
            justify-content: center;
            flex-shrink: 0;
            font-size: 16px;
            color: var(--color-primary);
            transition: transform var(--transition-base), background var(--transition-fast);
        }

        .faq-item.open .faq-question .faq-icon {
            transform: rotate(45deg);
            background: var(--color-primary);
            color: var(--color-text-white);
        }

        .faq-question h3 {
            font-size: 16px;
            font-weight: 600;
            color: var(--color-text-heading);
            letter-spacing: 0.2px;
            flex: 1;
        }

        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height var(--transition-base), padding var(--transition-base);
            padding: 0 var(--spacing-lg);
        }

        .faq-item.open .faq-answer {
            max-height: 300px;
            padding: 0 var(--spacing-lg) var(--spacing-lg);
        }

        .faq-answer p {
            font-size: 15px;
            color: var(--color-text-muted);
            line-height: 1.8;
        }

        /* ===== CTA ===== */
        .cta-section {
            background: var(--color-bg-blue-tint-strong);
            padding: var(--spacing-2xl) 0;
        }

        .cta-card {
            background: var(--color-surface);
            border-radius: var(--radius-lg);
            border: 1px solid var(--color-border);
            box-shadow: var(--shadow-lg);
            padding: var(--spacing-2xl);
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: var(--spacing-2xl);
            align-items: center;
        }

        .cta-card h2 {
            font-size: 26px;
            font-weight: 700;
            color: var(--color-text-heading);
            letter-spacing: 0.5px;
            margin-bottom: var(--spacing-sm);
        }

        .cta-card p {
            font-size: 15px;
            color: var(--color-text-muted);
            line-height: 1.8;
            margin-bottom: var(--spacing-lg);
        }

        .cta-actions {
            display: flex;
            gap: var(--spacing-md);
            flex-wrap: wrap;
        }

        .subscribe-form-card {
            background: var(--color-bg);
            border-radius: var(--radius-md);
            border: 1px solid var(--color-border);
            padding: var(--spacing-lg);
        }

        .subscribe-form-card label {
            display: block;
            font-size: 14px;
            font-weight: 600;
            color: var(--color-text-heading);
            margin-bottom: var(--spacing-sm);
        }

        .subscribe-input-group {
            display: flex;
            gap: var(--spacing-sm);
        }

        .subscribe-input-group input {
            flex: 1;
            padding: 10px 14px;
            border-radius: var(--radius-sm);
            border: 1px solid var(--color-border);
            background: var(--color-surface);
            font-size: 14px;
            color: var(--color-text-body);
            transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
        }

        .subscribe-input-group input::placeholder {
            color: var(--color-text-muted);
        }

        .subscribe-input-group input:focus {
            border-color: var(--color-primary);
            box-shadow: 0 0 0 3px rgba(30, 91, 143, 0.1);
        }

        .form-hint {
            font-size: 12px;
            color: var(--color-text-muted);
            margin-top: var(--spacing-sm);
        }

        /* ===== Footer ===== */
        .site-footer {
            background: #1A2B3C;
            color: rgba(255, 255, 255, 0.75);
            padding: var(--spacing-2xl) 0 0;
            border-top: 1px solid rgba(255, 255, 255, 0.06);
        }

        .site-footer .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr 1fr;
            gap: var(--spacing-2xl);
            padding-bottom: var(--spacing-2xl);
        }

        .footer-brand .brand-name {
            font-size: 22px;
            font-weight: 700;
            color: #FFFFFF;
            letter-spacing: 0.5px;
            display: block;
            margin-bottom: var(--spacing-sm);
        }

        .footer-brand p {
            font-size: 14px;
            color: rgba(255, 255, 255, 0.65);
            line-height: 1.8;
            max-width: 300px;
        }

        .footer-col h4 {
            font-size: 16px;
            font-weight: 600;
            color: #FFFFFF;
            letter-spacing: 0.3px;
            margin-bottom: var(--spacing-sm);
        }

        .footer-col ul {
            display: flex;
            flex-direction: column;
            gap: var(--spacing-sm);
        }

        .footer-col ul a {
            font-size: 14px;
            color: rgba(255, 255, 255, 0.65);
            transition: color var(--transition-fast);
        }

        .footer-col ul a:hover {
            color: #FFFFFF;
        }

        .footer-bottom {
            border-top: 1px solid rgba(255, 255, 255, 0.1);
            padding: var(--spacing-lg) 0;
            display: flex;
            flex-direction: column;
            gap: var(--spacing-sm);
            font-size: 13px;
            color: rgba(255, 255, 255, 0.55);
            align-items: center;
            text-align: center;
        }

        .footer-bottom-links {
            display: flex;
            gap: var(--spacing-sm);
            align-items: center;
        }

        .footer-bottom-links a {
            font-size: 13px;
            color: rgba(255, 255, 255, 0.65);
            transition: color var(--transition-fast);
        }

        .footer-bottom-links a:hover {
            color: #FFFFFF;
        }

        .footer-bottom-links span {
            color: rgba(255, 255, 255, 0.3);
        }

        /* ===== Load More Button ===== */
        .load-more-container {
            display: flex;
            justify-content: center;
            margin-top: var(--spacing-xl);
        }

        .btn-load-more {
            background: var(--color-surface);
            color: var(--color-primary);
            border: 1px solid var(--color-primary);
            padding: 12px 32px;
            border-radius: var(--radius-sm);
            font-size: 15px;
            font-weight: 600;
            transition: all var(--transition-fast);
            letter-spacing: 0.5px;
        }

        .btn-load-more:hover {
            background: var(--color-primary);
            color: var(--color-text-white);
            box-shadow: var(--shadow-md);
        }

        .btn-load-more:active {
            transform: translateY(1px);
            box-shadow: none;
        }

        /* ===== Responsive ===== */
        @media (max-width: 1024px) {
            .category-hero .container {
                grid-template-columns: 1fr;
                gap: var(--spacing-xl);
            }

            .category-hero-content h1 {
                font-size: 32px;
            }

            .category-hero-image {
                aspect-ratio: 16 / 9;
            }

            .data-strip {
                grid-template-columns: repeat(2, 1fr);
            }

            .dimension-grid {
                grid-template-columns: repeat(2, 1fr);
            }

            .related-cat-grid {
                grid-template-columns: repeat(2, 1fr);
            }

            .cta-card {
                grid-template-columns: 1fr;
                gap: var(--spacing-xl);
            }
        }

        @media (max-width: 768px) {
            .site-header .container {
                padding-top: 8px;
                padding-bottom: 8px;
            }

            .nav-main {
                display: none;
            }

            .nav-cta-group {
                display: none;
            }

            .hamburger {
                display: flex;
            }

            .mobile-drawer {
                display: none;
            }

            .mobile-drawer.open {
                display: block;
            }

            .section {
                padding: var(--spacing-xl) 0;
            }

            .section-heading h2 {
                font-size: 24px;
            }

            .category-hero {
                padding: var(--spacing-lg) 0;
            }

            .category-hero-content h1 {
                font-size: 28px;
            }

            .category-hero-content .hero-desc {
                font-size: 15px;
            }

            .featured-article-content {
                padding: var(--spacing-lg);
            }

            .featured-article-content h2 {
                font-size: 20px;
            }

            .small-articles-grid {
                grid-template-columns: 1fr;
            }

            .data-strip {
                grid-template-columns: 1fr 1fr;
                gap: var(--spacing-sm);
            }

            .data-card .data-number {
                font-size: 28px;
            }

            .dimension-grid {
                grid-template-columns: 1fr;
            }

            .related-cat-grid {
                grid-template-columns: 1fr;
            }

            .cta-card {
                padding: var(--spacing-lg);
            }

            .footer-grid {
                grid-template-columns: 1fr;
                gap: var(--spacing-xl);
            }

            .footer-brand p {
                max-width: 100%;
            }

            .subscribe-input-group {
                flex-direction: column;
            }

            .subscribe-input-group .btn {
                width: 100%;
            }

            .article-meta-row {
                flex-direction: column;
                align-items: flex-start;
            }

            .article-meta-row .article-read-more {
                margin-left: 0;
                margin-top: var(--spacing-sm);
            }
        }

        @media (max-width: 520px) {
            .container {
                padding: 0 var(--spacing-sm);
            }

            .section {
                padding: var(--spacing-lg) 0;
            }

            .category-hero-content h1 {
                font-size: 24px;
            }

            .category-hero-image {
                aspect-ratio: 3 / 2;
            }

            .data-strip {
                grid-template-columns: 1fr;
            }

            .featured-article-card .article-image-container {
                aspect-ratio: 16 / 10;
            }

            .featured-article-content {
                padding: var(--spacing-md);
            }

            .featured-article-content h2 {
                font-size: 18px;
            }

            .cta-card h2 {
                font-size: 22px;
            }

            .cta-actions {
                flex-direction: column;
            }

            .cta-actions .btn {
                width: 100%;
            }

            .footer-bottom {
                font-size: 12px;
            }
        }

/* roulang page: category5 */
:root {
            --color-primary: #1E5B8F;
            --color-primary-dark: #16476E;
            --color-primary-light: #3A8BC2;
            --color-accent: #3A8BC2;
            --color-bg: #F7F9FB;
            --color-surface: #FFFFFF;
            --color-border: #E1E7EC;
            --color-border-light: #E8EEF3;
            --color-text-heading: #1A2B3C;
            --color-text-body: #2F3E4E;
            --color-text-muted: #6B7A8C;
            --color-text-white: #FFFFFF;
            --color-overlay-dark: rgba(26, 43, 60, 0.78);
            --color-bg-blue-tint: rgba(30, 91, 143, 0.06);
            --color-bg-blue-tint-strong: rgba(30, 91, 143, 0.12);
            --radius-sm: 8px;
            --radius-md: 12px;
            --radius-lg: 16px;
            --shadow-sm: 0 2px 8px rgba(26, 43, 60, 0.06);
            --shadow-md: 0 4px 14px rgba(26, 43, 60, 0.08);
            --shadow-lg: 0 6px 18px rgba(26, 43, 60, 0.12);
            --shadow-xl: 0 10px 28px rgba(26, 43, 60, 0.16);
            --font-family: "PingFang SC", "Microsoft YaHei", "Noto Sans SC", "Hiragino Sans GB", sans-serif;
            --max-width: 1200px;
            --spacing-sm: 12px;
            --spacing-md: 20px;
            --spacing-lg: 32px;
            --spacing-xl: 48px;
            --spacing-2xl: 72px;
            --spacing-3xl: 96px;
            --transition-fast: 0.2s ease;
            --transition-base: 0.3s ease;
            --transition-slow: 0.4s ease;
        }

        *,
        *::before,
        *::after {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
        }

        html {
            scroll-behavior: smooth;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
        }

        body {
            font-family: var(--font-family);
            font-size: 16px;
            line-height: 1.8;
            color: var(--color-text-body);
            background-color: var(--color-bg);
            min-height: 100vh;
            overflow-x: hidden;
        }

        img {
            max-width: 100%;
            height: auto;
            display: block;
        }

        a {
            color: var(--color-primary);
            text-decoration: none;
            transition: color var(--transition-fast);
        }

        a:hover {
            color: var(--color-primary-dark);
        }

        button,
        input {
            font-family: inherit;
            font-size: inherit;
            border: none;
            outline: none;
            background: none;
        }

        button {
            cursor: pointer;
        }

        ul,
        ol {
            list-style: none;
        }

        .container {
            max-width: var(--max-width);
            margin: 0 auto;
            padding: 0 var(--spacing-md);
        }

        .section {
            padding: var(--spacing-2xl) 0;
        }

        .section-heading {
            margin-bottom: var(--spacing-lg);
        }

        .section-heading h2 {
            font-size: 28px;
            font-weight: 700;
            color: var(--color-text-heading);
            letter-spacing: 0.5px;
            position: relative;
            padding-bottom: var(--spacing-sm);
            display: inline-block;
            margin-bottom: 8px;
        }

        .section-heading h2::after {
            content: "";
            position: absolute;
            bottom: 0;
            left: 0;
            width: 48px;
            height: 3px;
            background: var(--color-primary);
            border-radius: 2px;
        }

        .section-heading .section-sub {
            font-size: 15px;
            color: var(--color-text-muted);
            max-width: 680px;
            line-height: 1.9;
        }

        /* Header / Navigation */
        .site-header {
            position: sticky;
            top: 0;
            z-index: 100;
            background: var(--color-surface);
            box-shadow: var(--shadow-sm);
            border-bottom: 1px solid var(--color-border-light);
            padding: 0;
        }

        .site-header .container {
            display: flex;
            align-items: center;
            justify-content: space-between;
            min-height: 72px;
            padding-top: 10px;
            padding-bottom: 10px;
            gap: var(--spacing-md);
        }

        .brand {
            display: flex;
            align-items: center;
            gap: 10px;
            flex-shrink: 0;
            text-decoration: none;
        }

        .brand-logo-mark {
            width: 40px;
            height: 40px;
            border-radius: var(--radius-sm);
            background: var(--color-primary);
            color: var(--color-text-white);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 20px;
            font-weight: 700;
            letter-spacing: 0;
            flex-shrink: 0;
        }

        .brand-name {
            font-size: 20px;
            font-weight: 700;
            color: var(--color-text-heading);
            letter-spacing: 0.5px;
            white-space: nowrap;
        }

        .nav-main {
            display: flex;
            align-items: center;
            gap: 6px;
            flex-wrap: nowrap;
            overflow-x: auto;
            scrollbar-width: thin;
            scrollbar-color: var(--color-border) transparent;
            -webkit-overflow-scrolling: touch;
        }

        .nav-main::-webkit-scrollbar {
            height: 4px;
        }

        .nav-main::-webkit-scrollbar-thumb {
            background: var(--color-border);
            border-radius: 2px;
        }

        .nav-card-item {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            padding: 8px 14px;
            border-radius: var(--radius-sm);
            background: var(--color-bg);
            color: var(--color-text-body);
            font-size: 14px;
            font-weight: 500;
            white-space: nowrap;
            text-decoration: none;
            border: 1px solid transparent;
            transition: all var(--transition-fast);
        }

        .nav-card-item:hover {
            background: var(--color-bg-blue-tint);
            color: var(--color-primary);
            border-color: var(--color-border-light);
        }

        .nav-card-item.active {
            background: var(--color-primary);
            color: var(--color-text-white);
            border-color: var(--color-primary);
            box-shadow: var(--shadow-sm);
        }

        .nav-card-item .nav-icon {
            font-size: 16px;
            line-height: 1;
        }

        .nav-cta-group {
            display: flex;
            align-items: center;
            gap: 8px;
            flex-shrink: 0;
        }

        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 6px;
            padding: 10px 20px;
            border-radius: var(--radius-sm);
            font-size: 15px;
            font-weight: 600;
            letter-spacing: 0.3px;
            text-decoration: none;
            transition: all var(--transition-fast);
            white-space: nowrap;
            border: 2px solid transparent;
        }

        .btn-primary {
            background: var(--color-primary);
            color: var(--color-text-white);
            border-color: var(--color-primary);
        }

        .btn-primary:hover {
            background: var(--color-primary-dark);
            border-color: var(--color-primary-dark);
            color: var(--color-text-white);
            box-shadow: var(--shadow-md);
            transform: translateY(-1px);
        }

        .btn-primary:focus-visible {
            outline: 3px solid rgba(30, 91, 143, 0.3);
            outline-offset: 2px;
        }

        .btn-primary:active {
            transform: translateY(0);
            box-shadow: var(--shadow-sm);
            background: var(--color-primary-dark);
        }

        .btn-outline {
            background: var(--color-surface);
            color: var(--color-primary);
            border-color: var(--color-primary);
        }

        .btn-outline:hover {
            background: var(--color-bg-blue-tint);
            border-color: var(--color-primary-dark);
            color: var(--color-primary-dark);
            box-shadow: var(--shadow-sm);
        }

        .btn-outline:focus-visible {
            outline: 3px solid rgba(30, 91, 143, 0.3);
            outline-offset: 2px;
        }

        .btn-sm {
            padding: 7px 16px;
            font-size: 13px;
        }

        /* Mobile menu toggle */
        .nav-toggle {
            display: none;
            flex-direction: column;
            gap: 5px;
            padding: 8px;
            border-radius: var(--radius-sm);
            background: var(--color-bg);
            border: 1px solid var(--color-border);
            z-index: 110;
        }

        .nav-toggle span {
            display: block;
            width: 22px;
            height: 2px;
            background: var(--color-text-heading);
            border-radius: 1px;
            transition: all var(--transition-base);
        }

        .nav-toggle.active span:nth-child(1) {
            transform: translateY(7px) rotate(45deg);
        }

        .nav-toggle.active span:nth-child(2) {
            opacity: 0;
            transform: scaleX(0);
        }

        .nav-toggle.active span:nth-child(3) {
            transform: translateY(-7px) rotate(-45deg);
        }

        /* Breadcrumb */
        .breadcrumb-section {
            padding: var(--spacing-md) 0 var(--spacing-sm);
            background: var(--color-surface);
            border-bottom: 1px solid var(--color-border-light);
        }

        .breadcrumb {
            display: flex;
            align-items: center;
            gap: 8px;
            font-size: 14px;
            color: var(--color-text-muted);
            flex-wrap: wrap;
        }

        .breadcrumb a {
            color: var(--color-text-muted);
            text-decoration: none;
            transition: color var(--transition-fast);
        }

        .breadcrumb a:hover {
            color: var(--color-primary);
        }

        .breadcrumb .sep {
            color: var(--color-border);
            font-size: 12px;
        }

        .breadcrumb .current {
            color: var(--color-primary);
            font-weight: 600;
        }

        /* Category Hero */
        .category-hero {
            padding: var(--spacing-xl) 0 var(--spacing-lg);
            background: var(--color-surface);
            border-bottom: 1px solid var(--color-border-light);
        }

        .category-hero .container {
            max-width: var(--max-width);
        }

        .category-hero h1 {
            font-size: 36px;
            font-weight: 700;
            color: var(--color-text-heading);
            letter-spacing: 0.5px;
            margin-bottom: var(--spacing-sm);
            line-height: 1.35;
        }

        .category-hero .hero-accent {
            width: 48px;
            height: 3px;
            background: var(--color-primary);
            border-radius: 2px;
            margin-bottom: var(--spacing-md);
        }

        .category-hero .hero-desc {
            font-size: 16px;
            color: var(--color-text-body);
            line-height: 1.9;
            max-width: 880px;
        }

        /* Main Category Layout - Split */
        .category-main {
            padding: var(--spacing-xl) 0 var(--spacing-2xl);
        }

        .category-split {
            display: grid;
            grid-template-columns: 1fr 340px;
            gap: var(--spacing-lg);
            align-items: start;
        }

        /* Left Column */
        .article-list {
            display: flex;
            flex-direction: column;
            gap: var(--spacing-md);
        }

        .article-card {
            background: var(--color-surface);
            border: 1px solid var(--color-border);
            border-radius: var(--radius-md);
            overflow: hidden;
            box-shadow: var(--shadow-sm);
            transition: all var(--transition-base);
            display: flex;
            flex-direction: row;
            gap: 0;
        }

        .article-card:hover {
            box-shadow: var(--shadow-lg);
            transform: translateY(-2px);
            border-color: var(--color-border-light);
        }

        .article-card .article-thumb {
            flex: 0 0 180px;
            min-height: 100%;
            position: relative;
            overflow: hidden;
        }

        .article-card .article-thumb img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            min-height: 140px;
        }

        .article-card .article-body {
            flex: 1;
            padding: var(--spacing-md) var(--spacing-lg);
            display: flex;
            flex-direction: column;
            gap: 8px;
        }

        .article-card .article-tag {
            display: inline-flex;
            align-items: center;
            gap: 4px;
            padding: 3px 10px;
            border-radius: 20px;
            font-size: 12px;
            font-weight: 600;
            background: var(--color-bg-blue-tint);
            color: var(--color-primary);
            align-self: flex-start;
        }

        .article-card .article-title {
            font-size: 18px;
            font-weight: 700;
            color: var(--color-text-heading);
            line-height: 1.5;
            text-decoration: none;
            transition: color var(--transition-fast);
        }

        .article-card .article-title:hover {
            color: var(--color-primary);
        }

        .article-card .article-excerpt {
            font-size: 14px;
            color: var(--color-text-muted);
            line-height: 1.7;
            flex: 1;
        }

        .article-card .article-meta {
            display: flex;
            align-items: center;
            gap: var(--spacing-sm);
            font-size: 13px;
            color: var(--color-text-muted);
        }

        .article-card .article-meta .date {
            display: inline-flex;
            align-items: center;
            gap: 4px;
        }

        .article-card .read-more {
            display: inline-flex;
            align-items: center;
            gap: 4px;
            font-size: 13px;
            font-weight: 600;
            color: var(--color-primary);
            text-decoration: none;
            transition: color var(--transition-fast);
        }

        .article-card .read-more:hover {
            color: var(--color-primary-dark);
        }

        /* Right Column */
        .sidebar {
            display: flex;
            flex-direction: column;
            gap: var(--spacing-lg);
            position: sticky;
            top: 100px;
        }

        .sidebar-card {
            background: var(--color-surface);
            border: 1px solid var(--color-border);
            border-radius: var(--radius-md);
            padding: var(--spacing-lg);
            box-shadow: var(--shadow-sm);
        }

        .sidebar-card h3 {
            font-size: 18px;
            font-weight: 700;
            color: var(--color-text-heading);
            margin-bottom: var(--spacing-md);
            padding-bottom: var(--spacing-sm);
            border-bottom: 2px solid var(--color-border-light);
            position: relative;
        }

        .sidebar-card h3::after {
            content: "";
            position: absolute;
            bottom: -2px;
            left: 0;
            width: 36px;
            height: 2px;
            background: var(--color-primary);
            border-radius: 1px;
        }

        .hot-article-item {
            display: flex;
            gap: 12px;
            padding: 10px 0;
            border-bottom: 1px solid var(--color-border-light);
            text-decoration: none;
            transition: all var(--transition-fast);
            align-items: flex-start;
        }

        .hot-article-item:last-child {
            border-bottom: none;
            padding-bottom: 0;
        }

        .hot-article-item:hover {
            transform: translateX(4px);
        }

        .hot-article-item .hot-thumb {
            flex: 0 0 56px;
            width: 56px;
            height: 56px;
            border-radius: var(--radius-sm);
            overflow: hidden;
            flex-shrink: 0;
        }

        .hot-article-item .hot-thumb img {
            width: 100%;
            height: 100%;
            object-fit: cover;
        }

        .hot-article-item .hot-info {
            flex: 1;
            display: flex;
            flex-direction: column;
            gap: 4px;
        }

        .hot-article-item .hot-title {
            font-size: 14px;
            font-weight: 600;
            color: var(--color-text-heading);
            line-height: 1.5;
            transition: color var(--transition-fast);
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }

        .hot-article-item:hover .hot-title {
            color: var(--color-primary);
        }

        .hot-article-item .hot-views {
            font-size: 12px;
            color: var(--color-text-muted);
        }

        /* Subscribe form */
        .subscribe-form {
            display: flex;
            flex-direction: column;
            gap: 10px;
        }

        .subscribe-form input[type="email"] {
            width: 100%;
            padding: 12px 16px;
            border-radius: var(--radius-sm);
            border: 1px solid var(--color-border);
            background: var(--color-bg);
            font-size: 14px;
            color: var(--color-text-body);
            transition: all var(--transition-fast);
        }

        .subscribe-form input[type="email"]:focus {
            border-color: var(--color-primary);
            background: var(--color-surface);
            box-shadow: 0 0 0 3px rgba(30, 91, 143, 0.1);
            outline: none;
        }

        .subscribe-form input[type="email"]::placeholder {
            color: var(--color-text-muted);
        }

        .subscribe-form .btn {
            width: 100%;
            justify-content: center;
        }

        .subscribe-form .form-hint {
            font-size: 12px;
            color: var(--color-text-muted);
            text-align: center;
            line-height: 1.6;
        }

        /* Pagination */
        .pagination {
            display: flex;
            align-items: center;
            gap: 6px;
            justify-content: center;
            padding: var(--spacing-md) 0;
            flex-wrap: wrap;
        }

        .pagination .page-link {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            min-width: 38px;
            height: 38px;
            padding: 0 10px;
            border-radius: var(--radius-sm);
            font-size: 14px;
            font-weight: 500;
            color: var(--color-text-body);
            background: var(--color-surface);
            border: 1px solid var(--color-border);
            text-decoration: none;
            transition: all var(--transition-fast);
        }

        .pagination .page-link:hover {
            border-color: var(--color-primary);
            color: var(--color-primary);
            background: var(--color-bg-blue-tint);
        }

        .pagination .page-link.active {
            background: var(--color-primary);
            border-color: var(--color-primary);
            color: var(--color-text-white);
            font-weight: 700;
        }

        .pagination .page-link.disabled {
            opacity: 0.5;
            pointer-events: none;
        }

        /* Related categories */
        .related-categories {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
            gap: var(--spacing-md);
        }

        .related-cat-card {
            background: var(--color-surface);
            border: 1px solid var(--color-border);
            border-radius: var(--radius-md);
            padding: var(--spacing-lg);
            box-shadow: var(--shadow-sm);
            text-decoration: none;
            transition: all var(--transition-base);
            display: flex;
            flex-direction: column;
            gap: 8px;
        }

        .related-cat-card:hover {
            box-shadow: var(--shadow-lg);
            transform: translateY(-3px);
            border-color: var(--color-border-light);
        }

        .related-cat-card .cat-icon {
            font-size: 28px;
            line-height: 1;
        }

        .related-cat-card .cat-name {
            font-size: 17px;
            font-weight: 700;
            color: var(--color-text-heading);
        }

        .related-cat-card .cat-desc {
            font-size: 14px;
            color: var(--color-text-muted);
            line-height: 1.7;
        }

        /* FAQ */
        .faq-list {
            display: flex;
            flex-direction: column;
            gap: var(--spacing-sm);
        }

        .faq-item {
            background: var(--color-surface);
            border: 1px solid var(--color-border);
            border-radius: var(--radius-md);
            overflow: hidden;
            box-shadow: var(--shadow-sm);
            transition: all var(--transition-base);
        }

        .faq-item:hover {
            box-shadow: var(--shadow-md);
        }

        .faq-question {
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: var(--spacing-sm);
            padding: 16px 20px;
            cursor: pointer;
            font-size: 16px;
            font-weight: 600;
            color: var(--color-text-heading);
            background: var(--color-surface);
            transition: background var(--transition-fast);
            text-align: left;
            width: 100%;
        }

        .faq-question:hover {
            background: var(--color-bg-blue-tint);
        }

        .faq-question .faq-icon {
            flex-shrink: 0;
            width: 24px;
            height: 24px;
            border-radius: 50%;
            background: var(--color-bg-blue-tint);
            color: var(--color-primary);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 16px;
            font-weight: 700;
            transition: all var(--transition-base);
            line-height: 1;
        }

        .faq-item.open .faq-icon {
            transform: rotate(45deg);
            background: var(--color-primary);
            color: var(--color-text-white);
        }

        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.35s ease, padding 0.3s ease;
            padding: 0 20px;
        }

        .faq-item.open .faq-answer {
            max-height: 400px;
            padding: 0 20px 16px;
        }

        .faq-answer p {
            font-size: 15px;
            color: var(--color-text-muted);
            line-height: 1.8;
            padding-top: 0;
        }

        /* CTA Section */
        .cta-section {
            background: var(--color-bg-blue-tint-strong);
            padding: var(--spacing-xl) 0;
        }

        .cta-card {
            background: var(--color-surface);
            border-radius: var(--radius-lg);
            padding: var(--spacing-xl) var(--spacing-lg);
            box-shadow: var(--shadow-md);
            text-align: center;
            max-width: 720px;
            margin: 0 auto;
            border: 1px solid var(--color-border-light);
        }

        .cta-card h2 {
            font-size: 26px;
            font-weight: 700;
            color: var(--color-text-heading);
            margin-bottom: var(--spacing-sm);
        }

        .cta-card p {
            font-size: 16px;
            color: var(--color-text-muted);
            margin-bottom: var(--spacing-lg);
            line-height: 1.8;
        }

        .cta-actions {
            display: flex;
            align-items: center;
            justify-content: center;
            gap: var(--spacing-sm);
            flex-wrap: wrap;
        }

        /* Footer */
        .site-footer {
            background: #1A2E40;
            color: rgba(255, 255, 255, 0.8);
            padding: var(--spacing-xl) 0 var(--spacing-md);
            margin-top: 0;
        }

        .site-footer .container {
            max-width: var(--max-width);
        }

        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr 1fr;
            gap: var(--spacing-lg);
            padding-bottom: var(--spacing-lg);
            border-bottom: 1px solid rgba(255, 255, 255, 0.12);
        }

        .footer-brand .brand-name {
            color: var(--color-text-white);
            font-size: 20px;
            font-weight: 700;
            display: block;
            margin-bottom: var(--spacing-sm);
            letter-spacing: 0.5px;
        }

        .footer-brand p {
            font-size: 14px;
            line-height: 1.8;
            color: rgba(255, 255, 255, 0.65);
            max-width: 280px;
        }

        .footer-col h4 {
            font-size: 15px;
            font-weight: 700;
            color: var(--color-text-white);
            margin-bottom: var(--spacing-sm);
            letter-spacing: 0.5px;
        }

        .footer-col ul {
            display: flex;
            flex-direction: column;
            gap: 6px;
        }

        .footer-col ul li a {
            font-size: 14px;
            color: rgba(255, 255, 255, 0.65);
            text-decoration: none;
            transition: color var(--transition-fast);
        }

        .footer-col ul li a:hover {
            color: var(--color-text-white);
        }

        .footer-bottom {
            display: flex;
            flex-direction: column;
            align-items: center;
            gap: 8px;
            padding-top: var(--spacing-md);
            font-size: 13px;
            color: rgba(255, 255, 255, 0.55);
            text-align: center;
        }

        .footer-bottom-links {
            display: flex;
            align-items: center;
            gap: 10px;
        }

        .footer-bottom-links a {
            font-size: 13px;
            color: rgba(255, 255, 255, 0.65);
            text-decoration: none;
            transition: color var(--transition-fast);
        }

        .footer-bottom-links a:hover {
            color: var(--color-text-white);
        }

        /* Focus visible */
        a:focus-visible,
        button:focus-visible {
            outline: 3px solid rgba(30, 91, 143, 0.3);
            outline-offset: 2px;
            border-radius: var(--radius-sm);
        }

        /* Responsive */
        @media (max-width: 1024px) {
            .category-split {
                grid-template-columns: 1fr;
                gap: var(--spacing-md);
            }
            .sidebar {
                position: static;
                flex-direction: column;
                gap: var(--spacing-md);
            }
            .site-header .container {
                flex-wrap: nowrap;
            }
            .nav-cta-group {
                display: none;
            }
            .nav-main {
                flex: 1;
                justify-content: flex-start;
            }
        }

        @media (max-width: 768px) {
            body {
                font-size: 15px;
            }
            .section {
                padding: var(--spacing-xl) 0;
            }
            .category-hero h1 {
                font-size: 26px;
            }
            .category-hero .hero-desc {
                font-size: 15px;
            }
            .section-heading h2 {
                font-size: 24px;
            }
            .site-header .container {
                padding-top: 8px;
                padding-bottom: 8px;
                min-height: 60px;
                position: relative;
            }
            .nav-toggle {
                display: flex;
            }
            .nav-main {
                position: fixed;
                top: 0;
                right: -100%;
                width: 300px;
                height: 100vh;
                background: var(--color-surface);
                flex-direction: column;
                align-items: stretch;
                justify-content: flex-start;
                padding: 80px var(--spacing-md) var(--spacing-md);
                gap: 6px;
                box-shadow: var(--shadow-xl);
                transition: right var(--transition-base);
                overflow-y: auto;
                z-index: 105;
                border-left: 1px solid var(--color-border-light);
            }
            .nav-main.open {
                right: 0;
            }
            .nav-card-item {
                padding: 12px 16px;
                font-size: 15px;
                border-radius: var(--radius-sm);
                white-space: normal;
                justify-content: flex-start;
                width: 100%;
            }
            .nav-cta-group {
                display: flex;
                flex-direction: row;
                gap: 8px;
                margin-top: var(--spacing-sm);
                width: 100%;
            }
            .nav-cta-group .btn {
                flex: 1;
                justify-content: center;
            }
            .article-card {
                flex-direction: column;
            }
            .article-card .article-thumb {
                flex: 0 0 auto;
                width: 100%;
                height: auto;
                min-height: auto;
            }
            .article-card .article-thumb img {
                max-height: 180px;
                min-height: auto;
                width: 100%;
                object-fit: cover;
            }
            .article-card .article-body {
                padding: var(--spacing-sm) var(--spacing-md);
            }
            .article-card .article-title {
                font-size: 16px;
            }
            .footer-grid {
                grid-template-columns: 1fr;
                gap: var(--spacing-md);
                text-align: left;
            }
            .footer-brand p {
                max-width: 100%;
            }
            .cta-card {
                padding: var(--spacing-lg) var(--spacing-md);
            }
            .cta-card h2 {
                font-size: 22px;
            }
            .cta-actions {
                flex-direction: column;
                width: 100%;
            }
            .cta-actions .btn {
                width: 100%;
            }
            .subscribe-form .btn {
                width: 100%;
            }
            .breadcrumb-section {
                padding: var(--spacing-sm) 0;
            }
            .breadcrumb {
                font-size: 13px;
            }
        }

        @media (max-width: 520px) {
            .category-hero h1 {
                font-size: 22px;
            }
            .category-hero {
                padding: var(--spacing-lg) 0;
            }
            .article-card .article-thumb img {
                max-height: 140px;
            }
            .article-card .article-body {
                padding: var(--spacing-sm);
            }
            .article-card .article-title {
                font-size: 15px;
            }
            .article-card .article-excerpt {
                font-size: 13px;
            }
            .sidebar-card {
                padding: var(--spacing-md);
            }
            .related-categories {
                grid-template-columns: 1fr;
            }
            .pagination .page-link {
                min-width: 32px;
                height: 32px;
                font-size: 13px;
                padding: 0 8px;
            }
            .footer-bottom {
                font-size: 12px;
            }
        }

/* roulang page: category7 */
:root {
            --color-primary: #1E5B8F;
            --color-primary-dark: #16476E;
            --color-primary-light: #3A8BC2;
            --color-accent: #3A8BC2;
            --color-bg: #F7F9FB;
            --color-surface: #FFFFFF;
            --color-border: #E1E7EC;
            --color-border-light: #E8EEF3;
            --color-text-heading: #1A2B3C;
            --color-text-body: #2F3E4E;
            --color-text-muted: #6B7A8C;
            --color-text-white: #FFFFFF;
            --color-overlay-dark: rgba(26, 43, 60, 0.78);
            --color-bg-blue-tint: rgba(30, 91, 143, 0.06);
            --color-bg-blue-tint-strong: rgba(30, 91, 143, 0.12);
            --radius-sm: 8px;
            --radius-md: 12px;
            --radius-lg: 16px;
            --shadow-sm: 0 2px 8px rgba(26, 43, 60, 0.06);
            --shadow-md: 0 4px 14px rgba(26, 43, 60, 0.08);
            --shadow-lg: 0 6px 18px rgba(26, 43, 60, 0.12);
            --shadow-xl: 0 10px 28px rgba(26, 43, 60, 0.16);
            --font-family: "PingFang SC", "Microsoft YaHei", "Noto Sans SC", "Hiragino Sans GB", sans-serif;
            --max-width: 1200px;
            --spacing-sm: 12px;
            --spacing-md: 20px;
            --spacing-lg: 32px;
            --spacing-xl: 48px;
            --spacing-2xl: 72px;
            --spacing-3xl: 96px;
            --transition-fast: 0.2s ease;
            --transition-base: 0.3s ease;
            --transition-slow: 0.4s ease;
        }
        * {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
        }
        html {
            scroll-behavior: smooth;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
        }
        body {
            font-family: var(--font-family);
            font-size: 16px;
            line-height: 1.8;
            color: var(--color-text-body);
            background-color: var(--color-bg);
            min-height: 100vh;
            display: flex;
            flex-direction: column;
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
        }
        a {
            color: var(--color-primary);
            text-decoration: none;
            transition: color var(--transition-fast);
        }
        a:hover {
            color: var(--color-primary-dark);
        }
        button,
        input {
            font-family: inherit;
            font-size: inherit;
            border: none;
            outline: none;
            background: none;
        }
        button {
            cursor: pointer;
        }
        .container {
            max-width: var(--max-width);
            margin: 0 auto;
            padding: 0 var(--spacing-md);
            width: 100%;
        }
        .section {
            padding: var(--spacing-2xl) 0;
        }
        .section-heading {
            margin-bottom: var(--spacing-lg);
        }
        .section-heading h2 {
            font-size: 28px;
            font-weight: 700;
            color: var(--color-text-heading);
            letter-spacing: 0.5px;
            position: relative;
            padding-bottom: var(--spacing-sm);
            display: inline-block;
            margin-bottom: 8px;
        }
        .section-heading h2::after {
            content: "";
            position: absolute;
            bottom: 0;
            left: 0;
            width: 48px;
            height: 3px;
            background: var(--color-primary);
            border-radius: 2px;
        }
        .section-heading .section-sub {
            font-size: 15px;
            color: var(--color-text-muted);
            max-width: 680px;
            line-height: 1.9;
        }

        /* ===== Header / Navigation ===== */
        .site-header {
            position: sticky;
            top: 0;
            z-index: 100;
            background: var(--color-surface);
            box-shadow: var(--shadow-sm);
            border-bottom: 1px solid var(--color-border-light);
            padding: 0;
        }
        .site-header .container {
            display: flex;
            align-items: center;
            justify-content: space-between;
            min-height: 72px;
            padding-top: 10px;
            padding-bottom: 10px;
            gap: var(--spacing-md);
        }
        .brand {
            display: flex;
            align-items: center;
            gap: 10px;
            flex-shrink: 0;
        }
        .brand-logo-mark {
            width: 40px;
            height: 40px;
            border-radius: var(--radius-sm);
            background: var(--color-primary);
            color: var(--color-text-white);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 20px;
            font-weight: 700;
            letter-spacing: 0;
            flex-shrink: 0;
        }
        .brand-name {
            font-size: 20px;
            font-weight: 700;
            color: var(--color-text-heading);
            letter-spacing: 0.5px;
            white-space: nowrap;
        }
        .nav-main {
            display: flex;
            align-items: center;
            gap: 8px;
            flex-wrap: nowrap;
            overflow-x: auto;
            scrollbar-width: thin;
            scrollbar-color: var(--color-border) transparent;
            -webkit-overflow-scrolling: touch;
        }
        .nav-main::-webkit-scrollbar {
            height: 4px;
        }
        .nav-main::-webkit-scrollbar-thumb {
            background: var(--color-border);
            border-radius: 2px;
        }
        .nav-card-item {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            padding: 8px 14px;
            border-radius: var(--radius-sm);
            background: var(--color-bg);
            color: var(--color-text-body);
            font-size: 14px;
            font-weight: 500;
            white-space: nowrap;
            transition: background var(--transition-fast), color var(--transition-fast), box-shadow var(--transition-fast);
            border: 1px solid transparent;
        }
        .nav-card-item:hover {
            background: var(--color-bg-blue-tint);
            color: var(--color-primary);
            box-shadow: var(--shadow-sm);
        }
        .nav-card-item.active {
            background: var(--color-primary);
            color: var(--color-text-white);
            border-color: var(--color-primary);
            box-shadow: var(--shadow-sm);
        }
        .nav-icon {
            font-size: 16px;
            line-height: 1;
        }
        .nav-cta-group {
            display: flex;
            align-items: center;
            gap: 10px;
            flex-shrink: 0;
        }
        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            border-radius: var(--radius-sm);
            padding: 10px 20px;
            font-size: 15px;
            font-weight: 600;
            transition: background var(--transition-fast), color var(--transition-fast), box-shadow var(--transition-fast), transform var(--transition-fast);
            text-align: center;
            border: 1px solid transparent;
            white-space: nowrap;
        }
        .btn:focus-visible {
            outline: 2px solid rgba(30, 91, 143, 0.3);
            outline-offset: 2px;
        }
        .btn-primary {
            background: var(--color-primary);
            color: var(--color-text-white);
        }
        .btn-primary:hover {
            background: var(--color-primary-dark);
            color: var(--color-text-white);
            box-shadow: var(--shadow-md);
            transform: translateY(-1px);
        }
        .btn-outline {
            background: var(--color-surface);
            color: var(--color-primary);
            border-color: var(--color-primary);
        }
        .btn-outline:hover {
            background: var(--color-bg-blue-tint);
            color: var(--color-primary-dark);
            border-color: var(--color-primary-dark);
        }
        .mobile-menu-toggle {
            display: none;
            background: var(--color-bg);
            border-radius: var(--radius-sm);
            padding: 8px 10px;
            font-size: 18px;
            color: var(--color-primary);
            border: 1px solid var(--color-border);
        }
        .mobile-menu-toggle:hover {
            background: var(--color-bg-blue-tint);
        }

        /* ===== Breadcrumb ===== */
        .breadcrumb {
            background: var(--color-surface);
            border-bottom: 1px solid var(--color-border-light);
            padding: 14px 0;
            font-size: 14px;
            color: var(--color-text-muted);
        }
        .breadcrumb .container {
            display: flex;
            align-items: center;
            gap: 8px;
            flex-wrap: wrap;
        }
        .breadcrumb a {
            color: var(--color-text-muted);
        }
        .breadcrumb a:hover {
            color: var(--color-primary);
        }
        .breadcrumb .separator {
            color: var(--color-border);
        }
        .breadcrumb .current {
            color: var(--color-primary);
            font-weight: 500;
        }

        /* ===== Category Page Specific ===== */
        .category-hero {
            background: var(--color-surface);
            border-bottom: 1px solid var(--color-border-light);
            padding: var(--spacing-xl) 0;
        }
        .category-hero .container {
            display: flex;
            flex-direction: column;
            gap: var(--spacing-md);
        }
        .category-hero h1 {
            font-size: 36px;
            font-weight: 700;
            color: var(--color-text-heading);
            letter-spacing: 0.5px;
            line-height: 1.3;
        }
        .category-hero .hero-description {
            font-size: 16px;
            color: var(--color-text-body);
            max-width: 860px;
            line-height: 1.9;
        }

        .tag-panel {
            background: var(--color-surface);
            border: 1px solid var(--color-border);
            border-radius: var(--radius-md);
            padding: var(--spacing-lg);
            box-shadow: var(--shadow-sm);
            margin-bottom: var(--spacing-lg);
        }
        .tag-panel h2 {
            font-size: 20px;
            font-weight: 700;
            color: var(--color-text-heading);
            margin-bottom: var(--spacing-md);
        }
        .tag-list {
            display: flex;
            flex-wrap: wrap;
            gap: 10px;
        }
        .tag-chip {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            padding: 6px 14px;
            border-radius: 999px;
            background: var(--color-bg);
            color: var(--color-text-body);
            font-size: 14px;
            border: 1px solid var(--color-border);
            transition: all var(--transition-fast);
            cursor: pointer;
        }
        .tag-chip:hover,
        .tag-chip.active {
            background: var(--color-primary);
            color: var(--color-text-white);
            border-color: var(--color-primary);
            box-shadow: var(--shadow-sm);
        }

        .media-grid {
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: var(--spacing-lg);
        }
        .media-card {
            background: var(--color-surface);
            border: 1px solid var(--color-border);
            border-radius: var(--radius-md);
            overflow: hidden;
            box-shadow: var(--shadow-sm);
            transition: box-shadow var(--transition-base), transform var(--transition-base);
            display: flex;
            flex-direction: column;
        }
        .media-card:hover {
            box-shadow: var(--shadow-lg);
            transform: translateY(-3px);
        }
        .media-card-img {
            aspect-ratio: 16 / 9;
            overflow: hidden;
            background: var(--color-bg-blue-tint);
        }
        .media-card-img img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform var(--transition-slow);
        }
        .media-card:hover .media-card-img img {
            transform: scale(1.03);
        }
        .media-card-body {
            padding: var(--spacing-lg);
            display: flex;
            flex-direction: column;
            flex: 1;
        }
        .media-card-tag {
            display: inline-block;
            background: var(--color-bg-blue-tint);
            color: var(--color-primary);
            font-size: 12px;
            font-weight: 600;
            padding: 4px 10px;
            border-radius: 999px;
            margin-bottom: var(--spacing-sm);
            align-self: flex-start;
        }
        .media-card h3 {
            font-size: 18px;
            font-weight: 700;
            color: var(--color-text-heading);
            line-height: 1.5;
            margin-bottom: var(--spacing-sm);
        }
        .media-card p {
            font-size: 14px;
            color: var(--color-text-muted);
            line-height: 1.7;
            margin-bottom: var(--spacing-md);
            flex: 1;
        }
        .media-card-meta {
            display: flex;
            align-items: center;
            justify-content: space-between;
            font-size: 13px;
            color: var(--color-text-muted);
            border-top: 1px solid var(--color-border-light);
            padding-top: var(--spacing-sm);
        }
        .read-more-link {
            font-size: 14px;
            font-weight: 600;
            color: var(--color-primary);
            display: inline-flex;
            align-items: center;
            gap: 4px;
        }
        .read-more-link:hover {
            color: var(--color-primary-dark);
        }

        .related-categories {
            margin-top: var(--spacing-xl);
        }
        .related-category-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: var(--spacing-md);
        }
        .related-category-card {
            background: var(--color-surface);
            border: 1px solid var(--color-border);
            border-radius: var(--radius-md);
            padding: var(--spacing-lg);
            box-shadow: var(--shadow-sm);
            display: flex;
            align-items: center;
            gap: var(--spacing-md);
            transition: box-shadow var(--transition-base), transform var(--transition-base);
        }
        .related-category-card:hover {
            box-shadow: var(--shadow-md);
            transform: translateY(-2px);
        }
        .related-category-icon {
            width: 44px;
            height: 44px;
            border-radius: var(--radius-sm);
            background: var(--color-bg-blue-tint);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 22px;
            flex-shrink: 0;
        }
        .related-category-info h4 {
            font-size: 16px;
            font-weight: 700;
            color: var(--color-text-heading);
            margin-bottom: 4px;
        }
        .related-category-info p {
            font-size: 13px;
            color: var(--color-text-muted);
            line-height: 1.6;
        }

        .faq-section {
            background: var(--color-surface);
            border-top: 1px solid var(--color-border-light);
            border-bottom: 1px solid var(--color-border-light);
        }
        .faq-list {
            display: flex;
            flex-direction: column;
            gap: var(--spacing-sm);
        }
        .faq-item {
            background: var(--color-surface);
            border: 1px solid var(--color-border);
            border-radius: var(--radius-md);
            overflow: hidden;
            box-shadow: var(--shadow-sm);
        }
        .faq-question {
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding: var(--spacing-md) var(--spacing-lg);
            cursor: pointer;
            font-size: 16px;
            font-weight: 600;
            color: var(--color-text-heading);
            background: var(--color-surface);
            transition: background var(--transition-fast);
            border: none;
            width: 100%;
            text-align: left;
        }
        .faq-question:hover {
            background: var(--color-bg-blue-tint);
        }
        .faq-question .faq-icon {
            font-size: 20px;
            color: var(--color-primary);
            flex-shrink: 0;
            transition: transform var(--transition-base);
        }
        .faq-item.active .faq-question .faq-icon {
            transform: rotate(45deg);
        }
        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height var(--transition-base);
            padding: 0 var(--spacing-lg);
        }
        .faq-item.active .faq-answer {
            max-height: 400px;
        }
        .faq-answer-inner {
            padding-bottom: var(--spacing-md);
            font-size: 15px;
            color: var(--color-text-muted);
            line-height: 1.8;
        }

        .cta-section {
            background: var(--color-bg-blue-tint);
        }
        .cta-card {
            background: var(--color-surface);
            border: 1px solid var(--color-border);
            border-radius: var(--radius-lg);
            padding: var(--spacing-xl);
            box-shadow: var(--shadow-md);
            display: flex;
            flex-wrap: wrap;
            gap: var(--spacing-lg);
            align-items: center;
            justify-content: space-between;
        }
        .cta-info {
            flex: 1;
            min-width: 260px;
        }
        .cta-info h2 {
            font-size: 26px;
            font-weight: 700;
            color: var(--color-text-heading);
            margin-bottom: var(--spacing-sm);
        }
        .cta-info p {
            font-size: 15px;
            color: var(--color-text-muted);
            line-height: 1.8;
        }
        .subscribe-form {
            display: flex;
            gap: var(--spacing-sm);
            flex-wrap: wrap;
            align-items: center;
            min-width: 280px;
        }
        .subscribe-form input {
            flex: 1;
            min-width: 200px;
            padding: 12px 16px;
            border-radius: var(--radius-sm);
            border: 1px solid var(--color-border);
            background: var(--color-bg);
            color: var(--color-text-body);
            transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
        }
        .subscribe-form input:focus {
            border-color: var(--color-primary);
            box-shadow: 0 0 0 3px rgba(30, 91, 143, 0.1);
        }
        .privacy-note {
            font-size: 12px;
            color: var(--color-text-muted);
            margin-top: var(--spacing-sm);
            display: block;
        }

        /* ===== Footer ===== */
        .site-footer {
            background: #1E2B3A;
            color: #D5DEE8;
            padding: var(--spacing-xl) 0 0;
            margin-top: auto;
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr 1fr;
            gap: var(--spacing-xl);
            padding-bottom: var(--spacing-xl);
        }
        .footer-brand .brand-name {
            color: #FFFFFF;
            font-size: 22px;
            display: block;
            margin-bottom: var(--spacing-sm);
        }
        .footer-brand p {
            font-size: 14px;
            color: #B8C4D0;
            line-height: 1.8;
            max-width: 320px;
        }
        .footer-col h4 {
            font-size: 16px;
            color: #FFFFFF;
            margin-bottom: var(--spacing-md);
            font-weight: 600;
        }
        .footer-col ul {
            list-style: none;
            display: flex;
            flex-direction: column;
            gap: 10px;
        }
        .footer-col ul a {
            color: #B8C4D0;
            font-size: 14px;
            transition: color var(--transition-fast);
        }
        .footer-col ul a:hover {
            color: #FFFFFF;
        }
        .footer-bottom {
            border-top: 1px solid rgba(255, 255, 255, 0.1);
            padding: var(--spacing-lg) 0;
            display: flex;
            flex-wrap: wrap;
            align-items: center;
            justify-content: space-between;
            gap: var(--spacing-sm);
            font-size: 13px;
            color: #9DAEBD;
        }
        .footer-bottom-links {
            display: flex;
            align-items: center;
            gap: 10px;
        }
        .footer-bottom-links a {
            color: #B8C4D0;
        }
        .footer-bottom-links a:hover {
            color: #FFFFFF;
        }

        /* ===== Responsive ===== */
        @media (max-width: 1024px) {
            .footer-grid {
                grid-template-columns: 1fr 1fr;
            }
            .media-grid {
                grid-template-columns: 1fr 1fr;
            }
            .related-category-grid {
                grid-template-columns: 1fr 1fr;
            }
        }
        @media (max-width: 768px) {
            .site-header .container {
                flex-wrap: wrap;
                min-height: auto;
                padding-top: 12px;
                padding-bottom: 12px;
            }
            .mobile-menu-toggle {
                display: block;
                margin-left: auto;
            }
            .nav-main {
                display: none;
                order: 10;
                width: 100%;
                flex-direction: column;
                align-items: stretch;
                gap: 4px;
                padding-top: var(--spacing-sm);
            }
            .nav-main.open {
                display: flex;
            }
            .nav-card-item {
                justify-content: flex-start;
                padding: 12px 16px;
                border-radius: var(--radius-sm);
            }
            .nav-cta-group {
                display: none;
            }
            .media-grid,
            .related-category-grid {
                grid-template-columns: 1fr;
            }
            .category-hero h1 {
                font-size: 28px;
            }
            .section-heading h2 {
                font-size: 24px;
            }
            .cta-card {
                flex-direction: column;
                align-items: stretch;
            }
            .footer-grid {
                grid-template-columns: 1fr;
                gap: var(--spacing-lg);
            }
            .footer-bottom {
                flex-direction: column;
                align-items: flex-start;
            }
        }
        @media (max-width: 520px) {
            .category-hero h1 {
                font-size: 24px;
            }
            .media-card-body {
                padding: var(--spacing-md);
            }
            .subscribe-form {
                flex-direction: column;
            }
            .btn {
                width: 100%;
                justify-content: center;
            }
        }

/* roulang page: category6 */
:root {
            --color-primary: #1E5B8F;
            --color-primary-dark: #16476E;
            --color-primary-light: #3A8BC2;
            --color-accent: #3A8BC2;
            --color-bg: #F7F9FB;
            --color-surface: #FFFFFF;
            --color-border: #E1E7EC;
            --color-border-light: #E8EEF3;
            --color-text-heading: #1A2B3C;
            --color-text-body: #2F3E4E;
            --color-text-muted: #6B7A8C;
            --color-text-white: #FFFFFF;
            --color-overlay-dark: rgba(26, 43, 60, 0.78);
            --color-bg-blue-tint: rgba(30, 91, 143, 0.06);
            --color-bg-blue-tint-strong: rgba(30, 91, 143, 0.12);
            --radius-sm: 8px;
            --radius-md: 12px;
            --radius-lg: 16px;
            --shadow-sm: 0 2px 8px rgba(26, 43, 60, 0.06);
            --shadow-md: 0 4px 14px rgba(26, 43, 60, 0.08);
            --shadow-lg: 0 6px 18px rgba(26, 43, 60, 0.12);
            --shadow-xl: 0 10px 28px rgba(26, 43, 60, 0.16);
            --font-family: "PingFang SC", "Microsoft YaHei", "Noto Sans SC", "Hiragino Sans GB", sans-serif;
            --max-width: 1200px;
            --spacing-sm: 12px;
            --spacing-md: 20px;
            --spacing-lg: 32px;
            --spacing-xl: 48px;
            --spacing-2xl: 72px;
            --spacing-3xl: 96px;
            --transition-fast: 0.2s ease;
            --transition-base: 0.3s ease;
            --transition-slow: 0.4s ease;
        }

        *,
        *::before,
        *::after {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
        }

        html {
            scroll-behavior: smooth;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
        }

        body {
            font-family: var(--font-family);
            font-size: 16px;
            line-height: 1.8;
            color: var(--color-text-body);
            background-color: var(--color-bg);
            min-height: 100vh;
            display: flex;
            flex-direction: column;
        }

        main {
            flex: 1;
        }

        img {
            max-width: 100%;
            height: auto;
            display: block;
        }

        a {
            color: var(--color-primary);
            text-decoration: none;
            transition: color var(--transition-fast);
        }

        a:hover {
            color: var(--color-primary-dark);
        }

        button,
        input {
            font-family: inherit;
            font-size: inherit;
            border: none;
            outline: none;
            background: none;
        }

        button {
            cursor: pointer;
        }

        .container {
            max-width: var(--max-width);
            margin: 0 auto;
            padding: 0 var(--spacing-md);
        }

        .section {
            padding: var(--spacing-2xl) 0;
        }

        .section-heading {
            margin-bottom: var(--spacing-xl);
        }

        .section-heading h2 {
            font-size: 28px;
            font-weight: 700;
            color: var(--color-text-heading);
            letter-spacing: 0.5px;
            position: relative;
            padding-bottom: var(--spacing-sm);
            display: inline-block;
            margin-bottom: 12px;
        }

        .section-heading h2::after {
            content: "";
            position: absolute;
            bottom: 0;
            left: 0;
            width: 48px;
            height: 3px;
            background: var(--color-primary);
            border-radius: 2px;
        }

        .section-heading .section-sub {
            font-size: 15px;
            color: var(--color-text-muted);
            max-width: 720px;
            line-height: 1.9;
        }

        /* ===== Header / Navigation ===== */
        .site-header {
            position: sticky;
            top: 0;
            z-index: 100;
            background: var(--color-surface);
            box-shadow: var(--shadow-sm);
            border-bottom: 1px solid var(--color-border-light);
        }

        .site-header .container {
            display: flex;
            align-items: center;
            justify-content: space-between;
            min-height: 72px;
            padding-top: 10px;
            padding-bottom: 10px;
            gap: var(--spacing-md);
        }

        .brand {
            display: flex;
            align-items: center;
            gap: 10px;
            flex-shrink: 0;
        }

        .brand-logo-mark {
            width: 40px;
            height: 40px;
            border-radius: var(--radius-sm);
            background: var(--color-primary);
            color: var(--color-text-white);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 20px;
            font-weight: 700;
            flex-shrink: 0;
        }

        .brand-name {
            font-size: 20px;
            font-weight: 700;
            color: var(--color-text-heading);
            letter-spacing: 0.5px;
            white-space: nowrap;
        }

        .nav-main {
            display: flex;
            align-items: center;
            gap: 6px;
            flex-wrap: nowrap;
            overflow-x: auto;
            scrollbar-width: thin;
            scrollbar-color: var(--color-border) transparent;
            -webkit-overflow-scrolling: touch;
        }

        .nav-main::-webkit-scrollbar {
            height: 4px;
        }

        .nav-main::-webkit-scrollbar-thumb {
            background: var(--color-border);
            border-radius: 2px;
        }

        .nav-card-item {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            padding: 8px 14px;
            border-radius: var(--radius-sm);
            background: transparent;
            color: var(--color-text-body);
            font-size: 14px;
            font-weight: 500;
            white-space: nowrap;
            transition: background var(--transition-fast), color var(--transition-fast), box-shadow var(--transition-fast);
        }

        .nav-card-item:hover {
            background: var(--color-bg-blue-tint);
            color: var(--color-primary);
        }

        .nav-card-item.active {
            background: var(--color-primary);
            color: var(--color-text-white);
            box-shadow: var(--shadow-sm);
        }

        .nav-card-item.active:hover {
            background: var(--color-primary-dark);
            color: var(--color-text-white);
        }

        .nav-icon {
            font-size: 16px;
            line-height: 1;
        }

        .nav-cta-group {
            display: flex;
            align-items: center;
            gap: 8px;
            flex-shrink: 0;
        }

        .btn {
            display: inline-inline-flex;
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 6px;
            padding: 10px 22px;
            border-radius: var(--radius-sm);
            font-size: 15px;
            font-weight: 600;
            letter-spacing: 0.3px;
            transition: background var(--transition-fast), color var(--transition-fast), box-shadow var(--transition-fast), outline var(--transition-fast), transform var(--transition-fast);
            text-align: center;
            line-height: 1.4;
        }

        .btn:focus-visible {
            outline: 2px solid rgba(30, 91, 143, 0.3);
            outline-offset: 2px;
        }

        .btn-primary {
            background: var(--color-primary);
            color: var(--color-text-white);
        }

        .btn-primary:hover {
            background: var(--color-primary-dark);
            color: var(--color-text-white);
            box-shadow: var(--shadow-md);
            transform: translateY(-1px);
        }

        .btn-primary:active {
            box-shadow: var(--shadow-sm);
            transform: translateY(0);
            background: var(--color-primary-dark);
        }

        .btn-outline {
            background: transparent;
            color: var(--color-primary);
            border: 1px solid var(--color-primary);
        }

        .btn-outline:hover {
            background: var(--color-bg-blue-tint);
            color: var(--color-primary-dark);
            border-color: var(--color-primary-dark);
        }

        .btn-outline:active {
            background: var(--color-bg-blue-tint-strong);
        }

        .btn-sm {
            padding: 6px 14px;
            font-size: 13px;
        }

        .btn-lg {
            padding: 14px 32px;
            font-size: 17px;
        }

        .nav-toggle {
            display: none;
            width: 44px;
            height: 44px;
            border-radius: var(--radius-sm);
            background: var(--color-bg-blue-tint);
            align-items: center;
            justify-content: center;
            flex-direction: column;
            gap: 4px;
            transition: background var(--transition-fast);
        }

        .nav-toggle:hover {
            background: var(--color-bg-blue-tint-strong);
        }

        .nav-toggle span {
            display: block;
            width: 20px;
            height: 2px;
            background: var(--color-text-heading);
            border-radius: 1px;
            transition: transform var(--transition-fast), opacity var(--transition-fast);
        }

        /* ===== Breadcrumb ===== */
        .breadcrumb-section {
            padding: var(--spacing-lg) 0 var(--spacing-sm);
            background: var(--color-surface);
            border-bottom: 1px solid var(--color-border-light);
        }

        .breadcrumb {
            display: flex;
            align-items: center;
            gap: 8px;
            font-size: 13px;
            color: var(--color-text-muted);
            flex-wrap: wrap;
        }

        .breadcrumb a {
            color: var(--color-text-muted);
        }

        .breadcrumb a:hover {
            color: var(--color-primary);
        }

        .breadcrumb .separator {
            color: var(--color-border);
        }

        .breadcrumb .current {
            color: var(--color-text-heading);
            font-weight: 600;
        }

        /* ===== Category Hero ===== */
        .cat-hero {
            padding: var(--spacing-xl) 0 var(--spacing-lg);
            background: var(--color-surface);
            border-bottom: 1px solid var(--color-border-light);
        }

        .cat-hero .container {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: var(--spacing-xl);
            align-items: center;
        }

        .cat-hero-content h1 {
            font-size: 38px;
            font-weight: 700;
            color: var(--color-text-heading);
            letter-spacing: 0.5px;
            margin-bottom: var(--spacing-md);
            line-height: 1.35;
        }

        .cat-hero-content .cat-desc {
            font-size: 15px;
            color: var(--color-text-body);
            line-height: 1.9;
            max-width: 640px;
        }

        .cat-hero-visual {
            border-radius: var(--radius-lg);
            overflow: hidden;
            box-shadow: var(--shadow-lg);
            position: relative;
            aspect-ratio: 16 / 10;
            background: var(--color-bg-blue-tint);
        }

        .cat-hero-visual img {
            width: 100%;
            height: 100%;
            object-fit: cover;
        }

        /* ===== Carousel Placeholder ===== */
        .carousel-section {
            padding: var(--spacing-xl) 0 var(--spacing-sm);
        }

        .carousel-placeholder {
            border-radius: var(--radius-lg);
            overflow: hidden;
            box-shadow: var(--shadow-lg);
            position: relative;
            background: var(--color-text-heading);
            aspect-ratio: 21 / 9;
            min-height: 280px;
        }

        .carousel-placeholder img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            opacity: 0.9;
        }

        .carousel-placeholder .carousel-overlay {
            position: absolute;
            inset: 0;
            background: linear-gradient(180deg, rgba(26, 43, 60, 0.25) 0%, rgba(26, 43, 60, 0.72) 100%);
            display: flex;
            flex-direction: column;
            justify-content: flex-end;
            padding: var(--spacing-xl);
        }

        .carousel-placeholder .carousel-overlay h3 {
            font-size: 24px;
            font-weight: 700;
            color: var(--color-text-white);
            margin-bottom: 8px;
            letter-spacing: 0.5px;
        }

        .carousel-placeholder .carousel-overlay p {
            font-size: 14px;
            color: rgba(255, 255, 255, 0.82);
            max-width: 560px;
            line-height: 1.7;
        }

        .carousel-dots {
            display: flex;
            gap: 8px;
            margin-top: var(--spacing-md);
        }

        .carousel-dots .dot {
            width: 8px;
            height: 8px;
            border-radius: 50%;
            background: rgba(255, 255, 255, 0.45);
            transition: background var(--transition-fast), transform var(--transition-fast);
        }

        .carousel-dots .dot.active {
            background: var(--color-text-white);
            transform: scale(1.25);
        }

        .carousel-dots .dot:hover {
            background: rgba(255, 255, 255, 0.75);
        }

        /* ===== Cards Grid ===== */
        .cards-grid-section {
            padding: var(--spacing-xl) 0 var(--spacing-2xl);
        }

        .cards-grid-4 {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: var(--spacing-lg);
        }

        .card-article {
            background: var(--color-surface);
            border-radius: var(--radius-md);
            border: 1px solid var(--color-border);
            box-shadow: var(--shadow-sm);
            overflow: hidden;
            display: flex;
            flex-direction: column;
            transition: box-shadow var(--transition-base), transform var(--transition-base), border-color var(--transition-base);
        }

        .card-article:hover {
            box-shadow: var(--shadow-lg);
            transform: translateY(-4px);
            border-color: var(--color-border-light);
        }

        .card-article .card-article-img {
            aspect-ratio: 16 / 9;
            overflow: hidden;
            background: var(--color-bg-blue-tint);
        }

        .card-article .card-article-img img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform var(--transition-slow);
        }

        .card-article:hover .card-article-img img {
            transform: scale(1.04);
        }

        .card-article-body {
            padding: var(--spacing-md);
            flex: 1;
            display: flex;
            flex-direction: column;
            gap: 10px;
        }

        .card-article-body .card-tag {
            font-size: 12px;
            font-weight: 600;
            color: var(--color-primary);
            background: var(--color-bg-blue-tint);
            padding: 2px 10px;
            border-radius: 20px;
            align-self: flex-start;
            letter-spacing: 0.3px;
        }

        .card-article-body h3 {
            font-size: 16px;
            font-weight: 700;
            color: var(--color-text-heading);
            line-height: 1.5;
            letter-spacing: 0.3px;
        }

        .card-article-body h3 a {
            color: var(--color-text-heading);
        }

        .card-article-body h3 a:hover {
            color: var(--color-primary);
        }

        .card-article-body .card-summary {
            font-size: 13px;
            color: var(--color-text-muted);
            line-height: 1.7;
            flex: 1;
        }

        .card-article-footer {
            display: flex;
            align-items: center;
            justify-content: space-between;
            font-size: 12px;
            color: var(--color-text-muted);
            border-top: 1px solid var(--color-border-light);
            padding-top: var(--spacing-sm);
            margin-top: auto;
        }

        .card-article-footer .read-more {
            font-size: 12px;
            font-weight: 600;
            color: var(--color-primary);
            display: inline-flex;
            align-items: center;
            gap: 4px;
        }

        .card-article-footer .read-more:hover {
            color: var(--color-primary-dark);
        }

        /* ===== Load More ===== */
        .load-more-section {
            padding: 0 0 var(--spacing-2xl);
            text-align: center;
        }

        .load-more-section .btn {
            min-width: 160px;
        }

        /* ===== Related Categories ===== */
        .related-cats-section {
            padding: var(--spacing-2xl) 0;
            background: var(--color-surface);
            border-top: 1px solid var(--color-border-light);
            border-bottom: 1px solid var(--color-border-light);
        }

        .related-cats-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: var(--spacing-md);
        }

        .related-cat-card {
            background: var(--color-bg);
            border: 1px solid var(--color-border);
            border-radius: var(--radius-md);
            padding: var(--spacing-lg);
            display: flex;
            flex-direction: column;
            gap: 8px;
            transition: box-shadow var(--transition-base), transform var(--transition-base), border-color var(--transition-base);
        }

        .related-cat-card:hover {
            box-shadow: var(--shadow-md);
            transform: translateY(-2px);
            border-color: var(--color-primary-light);
        }

        .related-cat-card .cat-icon {
            font-size: 28px;
            line-height: 1;
            margin-bottom: 4px;
        }

        .related-cat-card h3 {
            font-size: 16px;
            font-weight: 700;
            color: var(--color-text-heading);
        }

        .related-cat-card h3 a {
            color: var(--color-text-heading);
        }

        .related-cat-card h3 a:hover {
            color: var(--color-primary);
        }

        .related-cat-card p {
            font-size: 13px;
            color: var(--color-text-muted);
            line-height: 1.7;
        }

        /* ===== FAQ ===== */
        .faq-section {
            padding: var(--spacing-2xl) 0;
        }

        .faq-list {
            display: flex;
            flex-direction: column;
            gap: var(--spacing-md);
            max-width: 800px;
        }

        .faq-item {
            background: var(--color-surface);
            border: 1px solid var(--color-border);
            border-radius: var(--radius-md);
            box-shadow: var(--shadow-sm);
            overflow: hidden;
            transition: box-shadow var(--transition-base), border-color var(--transition-base);
        }

        .faq-item:hover {
            box-shadow: var(--shadow-md);
            border-color: var(--color-border-light);
        }

        .faq-item.open {
            border-color: var(--color-primary-light);
            box-shadow: var(--shadow-md);
        }

        .faq-question {
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: var(--spacing-md);
            padding: var(--spacing-md) var(--spacing-lg);
            font-size: 16px;
            font-weight: 600;
            color: var(--color-text-heading);
            background: none;
            width: 100%;
            text-align: left;
            transition: color var(--transition-fast);
            line-height: 1.5;
        }

        .faq-question:hover {
            color: var(--color-primary);
        }

        .faq-icon {
            flex-shrink: 0;
            width: 24px;
            height: 24px;
            border-radius: 50%;
            background: var(--color-bg-blue-tint);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 14px;
            font-weight: 700;
            color: var(--color-primary);
            transition: transform var(--transition-base), background var(--transition-base), color var(--transition-base);
        }

        .faq-item.open .faq-icon {
            transform: rotate(45deg);
            background: var(--color-primary);
            color: var(--color-text-white);
        }

        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.3s ease, padding 0.3s ease;
            padding: 0 var(--spacing-lg);
        }

        .faq-item.open .faq-answer {
            max-height: 300px;
            padding: 0 var(--spacing-lg) var(--spacing-md);
        }

        .faq-answer p {
            font-size: 15px;
            color: var(--color-text-muted);
            line-height: 1.85;
        }

        /* ===== CTA ===== */
        .cta-section {
            padding: var(--spacing-2xl) 0;
            background: var(--color-surface);
            border-top: 1px solid var(--color-border-light);
        }

        .cta-card {
            background: var(--color-bg-blue-tint-strong);
            border-radius: var(--radius-lg);
            padding: var(--spacing-xl);
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: var(--spacing-xl);
            flex-wrap: wrap;
            border: 1px solid rgba(30, 91, 143, 0.15);
        }

        .cta-content h2 {
            font-size: 24px;
            font-weight: 700;
            color: var(--color-text-heading);
            margin-bottom: 8px;
            letter-spacing: 0.5px;
        }

        .cta-content p {
            font-size: 15px;
            color: var(--color-text-body);
            line-height: 1.8;
            max-width: 560px;
        }

        .cta-actions {
            display: flex;
            flex-direction: column;
            gap: var(--spacing-sm);
            min-width: 260px;
        }

        .cta-actions .subscribe-form {
            display: flex;
            gap: 8px;
            flex-wrap: wrap;
        }

        .subscribe-form input[type="email"] {
            flex: 1;
            min-width: 180px;
            padding: 10px 14px;
            border: 1px solid var(--color-border);
            border-radius: var(--radius-sm);
            background: var(--color-surface);
            font-size: 14px;
            color: var(--color-text-body);
            transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
        }

        .subscribe-form input[type="email"]:focus {
            border-color: var(--color-primary);
            box-shadow: 0 0 0 3px rgba(30, 91, 143, 0.15);
        }

        .subscribe-form .btn {
            white-space: nowrap;
        }

        .cta-actions .privacy-hint {
            font-size: 12px;
            color: var(--color-text-muted);
            line-height: 1.5;
        }

        /* ===== Footer ===== */
        .site-footer {
            background: #1A2B3C;
            color: rgba(255, 255, 255, 0.75);
            padding: var(--spacing-2xl) 0 0;
            margin-top: auto;
        }

        .site-footer .container {
            max-width: var(--max-width);
        }

        .footer-grid {
            display: grid;
            grid-template-columns: 1.4fr 1fr 1fr 1fr;
            gap: var(--spacing-xl);
            padding-bottom: var(--spacing-xl);
            border-bottom: 1px solid rgba(255, 255, 255, 0.08);
        }

        .footer-brand .brand-name {
            color: var(--color-text-white);
            font-size: 22px;
            font-weight: 700;
            display: block;
            margin-bottom: var(--spacing-sm);
        }

        .footer-brand p {
            font-size: 13px;
            line-height: 1.8;
            color: rgba(255, 255, 255, 0.6);
            max-width: 300px;
        }

        .footer-col h4 {
            font-size: 14px;
            font-weight: 700;
            color: var(--color-text-white);
            margin-bottom: var(--spacing-sm);
            letter-spacing: 0.5px;
        }

        .footer-col ul {
            list-style: none;
            display: flex;
            flex-direction: column;
            gap: 6px;
        }

        .footer-col ul li a {
            font-size: 13px;
            color: rgba(255, 255, 255, 0.6);
            transition: color var(--transition-fast);
        }

        .footer-col ul li a:hover {
            color: var(--color-primary-light);
        }

        .footer-bottom {
            padding: var(--spacing-lg) 0;
            display: flex;
            align-items: center;
            justify-content: space-between;
            flex-wrap: wrap;
            gap: var(--spacing-sm);
            font-size: 12px;
            color: rgba(255, 255, 255, 0.45);
        }

        .footer-bottom-links {
            display: flex;
            align-items: center;
            gap: 8px;
        }

        .footer-bottom-links a {
            color: rgba(255, 255, 255, 0.45);
            font-size: 12px;
        }

        .footer-bottom-links a:hover {
            color: var(--color-primary-light);
        }

        /* ===== Responsive ===== */
        @media (max-width: 1024px) {
            .cards-grid-4 {
                grid-template-columns: repeat(2, 1fr);
            }

            .cat-hero .container {
                grid-template-columns: 1fr;
                gap: var(--spacing-lg);
            }

            .cat-hero-visual {
                aspect-ratio: 16 / 8;
            }

            .related-cats-grid {
                grid-template-columns: repeat(2, 1fr);
            }

            .footer-grid {
                grid-template-columns: 1fr 1fr;
            }
        }

        @media (max-width: 768px) {
            .site-header .container {
                flex-wrap: wrap;
                min-height: auto;
                padding-top: 12px;
                padding-bottom: 12px;
            }

            .nav-toggle {
                display: flex;
            }

            .nav-main {
                display: none;
                width: 100%;
                flex-direction: column;
                align-items: stretch;
                gap: 4px;
                padding-top: var(--spacing-sm);
                overflow-x: visible;
            }

            .nav-main.open {
                display: flex;
            }

            .nav-card-item {
                padding: 10px 14px;
                width: 100%;
                justify-content: flex-start;
                border-radius: var(--radius-sm);
            }

            .nav-cta-group {
                display: flex;
            }

            .cat-hero-content h1 {
                font-size: 28px;
            }

            .cards-grid-4 {
                grid-template-columns: 1fr;
            }

            .carousel-placeholder {
                aspect-ratio: 16 / 10;
                min-height: 200px;
            }

            .carousel-placeholder .carousel-overlay {
                padding: var(--spacing-md);
            }

            .carousel-placeholder .carousel-overlay h3 {
                font-size: 18px;
            }

            .carousel-placeholder .carousel-overlay p {
                font-size: 12px;
            }

            .related-cats-grid {
                grid-template-columns: 1fr;
            }

            .cta-card {
                flex-direction: column;
                align-items: stretch;
                padding: var(--spacing-lg);
            }

            .cta-actions {
                min-width: 0;
            }

            .subscribe-form {
                flex-direction: column;
            }

            .subscribe-form input[type="email"] {
                min-width: 0;
                width: 100%;
            }

            .footer-grid {
                grid-template-columns: 1fr;
                gap: var(--spacing-lg);
            }

            .footer-bottom {
                flex-direction: column;
                align-items: flex-start;
                gap: 6px;
            }
        }

        @media (max-width: 520px) {
            .section {
                padding: var(--spacing-xl) 0;
            }

            .section-heading h2 {
                font-size: 22px;
            }

            .cat-hero-content h1 {
                font-size: 24px;
            }

            .card-article-body h3 {
                font-size: 15px;
            }

            .btn {
                padding: 10px 18px;
                font-size: 14px;
            }

            .carousel-placeholder {
                min-height: 160px;
            }
        }