/* roulang page: index */
:root {
            --primary: #0f172a;
            --primary-light: #1e293b;
            --accent: #3b82f6;
            --accent-hover: #2563eb;
            --accent-light: #dbeafe;
            --secondary: #f59e0b;
            --bg: #f8fafc;
            --bg-deep: #eef2f7;
            --text: #0f172a;
            --text-light: #475569;
            --text-muted: #94a3b8;
            --border: #e2e8f0;
            --white: #ffffff;
            --radius: 12px;
            --radius-lg: 20px;
            --shadow-sm: 0 1px 3px rgba(15, 23, 42, 0.06), 0 1px 2px rgba(15, 23, 42, 0.04);
            --shadow-md: 0 4px 16px rgba(15, 23, 42, 0.08);
            --shadow-lg: 0 12px 32px rgba(15, 23, 42, 0.12);
            --transition: 0.25s ease;
            --container-w: 1200px;
            --font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
        }

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

        html {
            scroll-behavior: smooth;
            font-size: 16px;
        }

        body {
            font-family: var(--font-sans);
            background: var(--bg);
            color: var(--text);
            line-height: 1.6;
            -webkit-font-smoothing: antialiased;
        }

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

        a {
            color: inherit;
            text-decoration: none;
        }

        button {
            font-family: inherit;
            border: none;
            background: none;
            cursor: pointer;
        }

        input {
            font-family: inherit;
            border: none;
            outline: none;
        }

        ul,
        ol {
            list-style: none;
        }

        .container {
            max-width: var(--container-w);
            margin: 0 auto;
            padding: 0 24px;
        }

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

        .header-top {
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 20px;
            padding: 14px 0;
        }

        .logo {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 1.375rem;
            font-weight: 800;
            letter-spacing: -0.4px;
            white-space: nowrap;
        }

        .logo-icon {
            width: 40px;
            height: 40px;
            border-radius: 10px;
            background: linear-gradient(135deg, var(--accent), #7c3aed);
            display: flex;
            align-items: center;
            justify-content: center;
            color: var(--white);
            font-size: 1.1rem;
            flex-shrink: 0;
        }

        .logo span {
            color: var(--primary);
        }

        .logo .logo-mark {
            color: var(--accent);
        }

        .header-tools {
            display: flex;
            align-items: center;
            gap: 14px;
        }

        .header-search {
            display: flex;
            align-items: center;
            background: var(--bg);
            border-radius: 999px;
            border: 1px solid var(--border);
            padding: 7px 16px;
            gap: 10px;
            transition: border-color var(--transition), box-shadow var(--transition);
        }

        .header-search:focus-within {
            border-color: var(--accent);
            box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.15);
        }

        .header-search i {
            color: var(--text-muted);
            font-size: 0.875rem;
        }

        .header-search input {
            background: transparent;
            width: 180px;
            font-size: 0.875rem;
            color: var(--text);
        }

        .header-search input::placeholder {
            color: var(--text-muted);
        }

        .btn-primary {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            background: linear-gradient(135deg, var(--accent), #4f46e5);
            color: var(--white);
            font-weight: 600;
            font-size: 0.9rem;
            padding: 10px 22px;
            border-radius: 999px;
            transition: transform var(--transition), box-shadow var(--transition), opacity var(--transition);
            white-space: nowrap;
        }

        .btn-primary:hover {
            transform: translateY(-2px);
            box-shadow: 0 8px 24px rgba(59, 130, 246, 0.35);
        }

        .btn-primary:active {
            transform: translateY(0);
            opacity: 0.9;
        }

        .btn-outline {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            background: transparent;
            border: 1.5px solid var(--border);
            color: var(--text);
            font-weight: 600;
            font-size: 0.9rem;
            padding: 10px 24px;
            border-radius: 999px;
            transition: all var(--transition);
        }

        .btn-outline:hover {
            border-color: var(--accent);
            color: var(--accent);
            background: var(--accent-light);
        }

        .header-nav {
            border-top: 1px solid var(--border);
            background: var(--white);
        }

        .nav-tabs {
            display: flex;
            gap: 4px;
            overflow-x: auto;
            padding: 8px 0;
            scrollbar-width: none;
        }

        .nav-tabs::-webkit-scrollbar {
            display: none;
        }

        .nav-tabs a {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            font-size: 0.9rem;
            font-weight: 600;
            color: var(--text-light);
            padding: 8px 18px;
            border-radius: 999px;
            white-space: nowrap;
            transition: background var(--transition), color var(--transition);
        }

        .nav-tabs a:hover {
            background: var(--bg);
            color: var(--primary);
        }

        .nav-tabs a.active {
            background: var(--primary);
            color: var(--white);
        }

        .nav-tabs a i {
            font-size: 0.8rem;
            opacity: 0.75;
        }

        /* Hero Section */
        .hero {
            position: relative;
            padding: 80px 0 90px;
            overflow: hidden;
        }

        .hero-bg {
            position: absolute;
            inset: 0;
            background-image: url('/assets/images/backpic/back-1.png');
            background-size: cover;
            background-position: center;
            z-index: -2;
        }

        .hero-bg::after {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(90deg, rgba(15, 23, 42, 0.65) 0%, rgba(15, 23, 42, 0.75) 50%, rgba(15, 23, 42, 0.55) 100%);
        }

        .hero .container {
            position: relative;
            z-index: 1;
            display: grid;
            grid-template-columns: 1.2fr 0.8fr;
            gap: 60px;
            align-items: center;
        }

        .hero-content {
            color: var(--white);
        }

        .hero-badge {
            display: inline-flex;
            align-items: center;
            gap: 10px;
            background: rgba(255, 255, 255, 0.12);
            backdrop-filter: blur(8px);
            border-radius: 999px;
            padding: 8px 18px;
            font-size: 0.8rem;
            font-weight: 600;
            border: 1px solid rgba(255, 255, 255, 0.18);
            margin-bottom: 28px;
            letter-spacing: 0.3px;
        }

        .hero-badge .badge-dot {
            width: 7px;
            height: 7px;
            border-radius: 50%;
            background: #4ade80;
            box-shadow: 0 0 8px rgba(74, 222, 128, 0.8);
        }

        .hero h1 {
            font-size: 2.8rem;
            font-weight: 800;
            line-height: 1.2;
            letter-spacing: -0.5px;
            margin-bottom: 20px;
        }

        .hero h1 .highlight {
            color: #fbbf24;
            position: relative;
        }

        .hero p {
            font-size: 1.05rem;
            color: rgba(255, 255, 255, 0.85);
            max-width: 520px;
            line-height: 1.7;
            margin-bottom: 32px;
        }

        .hero-actions {
            display: flex;
            gap: 14px;
            flex-wrap: wrap;
        }

        .hero-actions .btn-hero {
            padding: 13px 30px;
            font-size: 0.95rem;
        }

        .hero-stats {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 12px;
            margin-top: 40px;
        }

        .stat-card {
            background: rgba(255, 255, 255, 0.1);
            backdrop-filter: blur(10px);
            border-radius: var(--radius);
            padding: 16px 12px;
            text-align: center;
            border: 1px solid rgba(255, 255, 255, 0.1);
        }

        .stat-number {
            font-size: 1.5rem;
            font-weight: 800;
            color: var(--white);
            line-height: 1.2;
        }

        .stat-label {
            font-size: 0.78rem;
            color: rgba(255, 255, 255, 0.65);
            margin-top: 4px;
        }

        .hero-visual {
            position: relative;
        }

        .hero-card {
            background: rgba(255, 255, 255, 0.12);
            backdrop-filter: blur(12px);
            border: 1px solid rgba(255, 255, 255, 0.2);
            border-radius: var(--radius-lg);
            padding: 28px;
            box-shadow: 0 20px 50px rgba(0, 0, 0, 0.3);
        }

        .hero-card img {
            border-radius: 12px;
            width: 100%;
            object-fit: cover;
            height: 240px;
            margin-bottom: 16px;
        }

        .hero-float-badge {
            position: absolute;
            background: var(--white);
            border-radius: 12px;
            padding: 10px 16px;
            box-shadow: var(--shadow-lg);
            display: flex;
            align-items: center;
            gap: 12px;
            bottom: -15px;
            left: 24px;
            font-size: 0.8rem;
        }

        .float-icon {
            width: 36px;
            height: 36px;
            border-radius: 10px;
            background: var(--accent-light);
            color: var(--accent);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1rem;
        }

        .float-title {
            font-weight: 700;
            color: var(--text);
            font-size: 0.85rem;
        }

        .float-sub {
            font-size: 0.72rem;
            color: var(--text-muted);
        }

        /* Section General */
        .section {
            padding: 80px 0;
        }

        .section-alt {
            background: var(--white);
        }

        .section-deep {
            background: var(--bg-deep);
        }

        .section-head {
            text-align: center;
            max-width: 680px;
            margin: 0 auto 56px;
        }

        .section-tag {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            font-size: 0.75rem;
            font-weight: 700;
            color: var(--accent);
            background: var(--accent-light);
            border-radius: 999px;
            padding: 6px 16px;
            margin-bottom: 16px;
            letter-spacing: 0.5px;
        }

        .section-head h2 {
            font-size: 2rem;
            font-weight: 800;
            color: var(--primary);
            letter-spacing: -0.4px;
            line-height: 1.3;
            margin-bottom: 14px;
        }

        .section-head p {
            color: var(--text-light);
            font-size: 0.95rem;
            line-height: 1.7;
        }

        /* Intro Section */
        .intro-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 56px;
            align-items: center;
        }

        .intro-image {
            position: relative;
        }

        .intro-image img {
            border-radius: var(--radius-lg);
            width: 100%;
            height: 320px;
            object-fit: cover;
            box-shadow: var(--shadow-lg);
        }

        .intro-image::before {
            content: '';
            position: absolute;
            top: -16px;
            left: -16px;
            width: 100%;
            height: 100%;
            border-radius: var(--radius-lg);
            background: linear-gradient(135deg, rgba(59, 130, 246, 0.15), transparent);
            z-index: -1;
        }

        .intro-content h3 {
            font-size: 1.4rem;
            font-weight: 700;
            margin-bottom: 16px;
            color: var(--primary);
            line-height: 1.4;
        }

        .intro-content p {
            color: var(--text-light);
            line-height: 1.8;
            margin-bottom: 20px;
        }

        .feature-list {
            display: grid;
            gap: 14px;
            margin-top: 24px;
        }

        .feature-item {
            display: flex;
            align-items: flex-start;
            gap: 12px;
        }

        .feature-item i {
            width: 38px;
            height: 38px;
            border-radius: 10px;
            background: var(--accent-light);
            color: var(--accent);
            display: flex;
            align-items: center;
            justify-content: center;
            flex-shrink: 0;
            font-size: 0.9rem;
        }

        .feature-item .feature-text h4 {
            font-size: 0.95rem;
            font-weight: 700;
            color: var(--primary);
            margin-bottom: 2px;
        }

        .feature-item .feature-text p {
            font-size: 0.85rem;
            margin: 0;
            color: var(--text-light);
            line-height: 1.5;
        }

        /* Category Cards */
        .category-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 24px;
        }

        .category-card {
            background: var(--white);
            border-radius: var(--radius-lg);
            overflow: hidden;
            box-shadow: var(--shadow-sm);
            border: 1px solid var(--border);
            transition: transform var(--transition), box-shadow var(--transition);
        }

        .category-card:hover {
            transform: translateY(-6px);
            box-shadow: var(--shadow-md);
        }

        .category-card-image {
            position: relative;
            height: 180px;
            overflow: hidden;
        }

        .category-card-image img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform 0.4s ease;
        }

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

        .category-card-image .badge {
            position: absolute;
            top: 14px;
            left: 14px;
            background: rgba(15, 23, 42, 0.75);
            backdrop-filter: blur(6px);
            color: var(--white);
            font-size: 0.72rem;
            font-weight: 600;
            padding: 5px 12px;
            border-radius: 999px;
        }

        .category-card-body {
            padding: 22px;
        }

        .category-card-body h3 {
            font-size: 1.05rem;
            font-weight: 700;
            margin-bottom: 8px;
            color: var(--primary);
        }

        .category-card-body p {
            font-size: 0.85rem;
            color: var(--text-light);
            line-height: 1.6;
            margin-bottom: 16px;
        }

        .card-link {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            font-size: 0.85rem;
            font-weight: 600;
            color: var(--accent);
            transition: gap var(--transition);
        }

        .card-link:hover {
            gap: 10px;
        }

        /* News/Article List Section */
        .news-section {
            background: var(--bg);
        }

        .news-wrapper {
            display: grid;
            grid-template-columns: 1.4fr 1fr;
            gap: 32px;
            align-items: start;
        }

        .news-main-card {
            background: var(--white);
            border-radius: var(--radius-lg);
            overflow: hidden;
            box-shadow: var(--shadow-sm);
            border: 1px solid var(--border);
            margin-bottom: 24px;
        }

        .news-main-card-image {
            position: relative;
            height: 220px;
            overflow: hidden;
        }

        .news-main-card-image img {
            width: 100%;
            height: 100%;
            object-fit: cover;
        }

        .news-main-card-content {
            padding: 24px;
        }

        .news-meta {
            display: flex;
            gap: 12px;
            align-items: center;
            font-size: 0.75rem;
            color: var(--text-muted);
            margin-bottom: 10px;
        }

        .news-meta .time {
            display: inline-flex;
            align-items: center;
            gap: 6px;
        }

        .news-main-card-content h3 {
            font-size: 1.1rem;
            font-weight: 700;
            margin-bottom: 10px;
            line-height: 1.5;
            color: var(--primary);
        }

        .news-main-card-content p {
            font-size: 0.87rem;
            color: var(--text-light);
            line-height: 1.7;
        }

        .news-list {
            display: grid;
            gap: 14px;
        }

        .news-list-item {
            background: var(--white);
            border: 1px solid var(--border);
            border-radius: var(--radius);
            padding: 17px 20px;
            transition: all var(--transition);
            display: block;
        }

        .news-list-item:hover {
            border-color: var(--accent);
            box-shadow: var(--shadow-sm);
            transform: translateX(4px);
        }

        .news-list-item h4 {
            font-size: 0.9rem;
            font-weight: 600;
            color: var(--primary);
            margin-bottom: 6px;
            line-height: 1.5;
            display: -webkit-box;
            -webkit-line-clamp: 1;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }

        .news-list-item .meta {
            font-size: 0.72rem;
            color: var(--text-muted);
        }

        .news-sidebar {
            background: var(--white);
            border-radius: var(--radius-lg);
            border: 1px solid var(--border);
            padding: 28px;
            box-shadow: var(--shadow-sm);
        }

        .sidebar-title {
            font-size: 1rem;
            font-weight: 700;
            color: var(--primary);
            margin-bottom: 18px;
            padding-bottom: 12px;
            border-bottom: 2px solid var(--accent-light);
            display: flex;
            align-items: center;
            gap: 8px;
        }

        .sidebar-list {
            display: grid;
            gap: 12px;
        }

        .sidebar-item {
            display: flex;
            align-items: center;
            gap: 12px;
            font-size: 0.85rem;
            color: var(--text-light);
            padding: 8px 0;
            transition: color var(--transition);
        }

        .sidebar-item:hover {
            color: var(--accent);
        }

        /* Stats/Process Section */
        .process-section {
            background-image: url('/assets/images/backpic/back-2.png');
            background-size: cover;
            background-position: center;
            position: relative;
            padding: 80px 0;
        }

        .process-section::before {
            content: '';
            position: absolute;
            inset: 0;
            background: rgba(15, 23, 42, 0.9);
        }

        .process-section .container {
            position: relative;
            z-index: 1;
        }

        .process-section .section-head h2,
        .process-section .section-head p {
            color: var(--white);
        }

        .process-section .section-tag {
            background: rgba(255, 255, 255, 0.12);
            color: #fbbf24;
        }

        .process-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 20px;
        }

        .process-card {
            background: rgba(255, 255, 255, 0.06);
            backdrop-filter: blur(10px);
            border: 1px solid rgba(255, 255, 255, 0.12);
            border-radius: var(--radius);
            padding: 28px 20px;
            text-align: center;
            transition: all var(--transition);
        }

        .process-card:hover {
            background: rgba(255, 255, 255, 0.12);
            transform: translateY(-4px);
        }

        .process-number {
            width: 44px;
            height: 44px;
            border-radius: 50%;
            background: rgba(59, 130, 246, 0.3);
            color: #93c5fd;
            font-size: 0.95rem;
            font-weight: 700;
            display: flex;
            align-items: center;
            justify-content: center;
            margin: 0 auto 16px;
            border: 1px solid rgba(147, 197, 253, 0.3);
        }

        .process-card h3 {
            font-size: 0.95rem;
            font-weight: 700;
            color: var(--white);
            margin-bottom: 8px;
        }

        .process-card p {
            font-size: 0.78rem;
            color: rgba(255, 255, 255, 0.65);
            line-height: 1.6;
        }

        /* Data/Stats Section */
        .data-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 24px;
        }

        .data-card {
            background: var(--white);
            border-radius: var(--radius);
            padding: 32px 24px;
            text-align: center;
            border: 1px solid var(--border);
            box-shadow: var(--shadow-sm);
        }

        .data-card .data-icon {
            width: 48px;
            height: 48px;
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            margin: 0 auto 16px;
            font-size: 1.2rem;
        }

        .data-card .data-icon.blue {
            background: var(--accent-light);
            color: var(--accent);
        }

        .data-card .data-icon.orange {
            background: #fef3c7;
            color: #d97706;
        }

        .data-card .data-icon.green {
            background: #dcfce7;
            color: #16a34a;
        }

        .data-card .data-icon.purple {
            background: #ede9fe;
            color: #7c3aed;
        }

        .data-card .data-value {
            font-size: 1.8rem;
            font-weight: 800;
            color: var(--primary);
            line-height: 1.2;
        }

        .data-card .data-label {
            font-size: 0.82rem;
            color: var(--text-muted);
            margin-top: 6px;
        }

        /* Guide Section */
        .guide-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 40px;
            align-items: center;
        }

        .guide-content h3 {
            font-size: 1.5rem;
            font-weight: 700;
            color: var(--primary);
            margin-bottom: 16px;
        }

        .guide-content p {
            color: var(--text-light);
            line-height: 1.8;
            margin-bottom: 24px;
        }

        .guide-list {
            display: grid;
            gap: 12px;
        }

        .guide-list-item {
            display: flex;
            align-items: center;
            gap: 12px;
            background: var(--white);
            border: 1px solid var(--border);
            border-radius: var(--radius);
            padding: 14px 18px;
            font-size: 0.9rem;
            color: var(--text);
            font-weight: 500;
        }

        .guide-list-item i {
            color: var(--accent);
            width: 24px;
            text-align: center;
        }

        .guide-list-item .step-num {
            font-size: 0.75rem;
            font-weight: 700;
            color: var(--accent);
            background: var(--accent-light);
            border-radius: 6px;
            padding: 2px 8px;
            margin-left: auto;
        }

        .guide-image img {
            border-radius: var(--radius-lg);
            width: 100%;
            height: 300px;
            object-fit: cover;
            box-shadow: var(--shadow-lg);
        }

        /* FAQ Section */
        .faq-wrapper {
            max-width: 820px;
            margin: 0 auto;
            display: grid;
            gap: 16px;
        }

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

        .faq-question {
            width: 100%;
            padding: 20px 24px;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 16px;
            font-size: 0.95rem;
            font-weight: 600;
            color: var(--primary);
            text-align: left;
            transition: background var(--transition);
        }

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

        .faq-question i {
            transition: transform var(--transition);
            color: var(--accent);
            flex-shrink: 0;
        }

        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.3s ease;
            padding: 0 24px;
        }

        .faq-answer-inner {
            padding-bottom: 20px;
            font-size: 0.88rem;
            color: var(--text-light);
            line-height: 1.8;
            border-top: 1px solid var(--border);
            padding-top: 16px;
        }

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

        .faq-item.active .faq-question i {
            transform: rotate(180deg);
        }

        .faq-item.active .faq-answer {
            max-height: 300px;
        }

        /* CTA Section */
        .cta-section {
            background-image: url('/assets/images/backpic/back-3.png');
            background-size: cover;
            background-position: center;
            position: relative;
            padding: 80px 0;
        }

        .cta-section::before {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(90deg, rgba(15, 23, 42, 0.85), rgba(37, 99, 235, 0.65));
        }

        .cta-section .container {
            position: relative;
            z-index: 1;
            display: grid;
            grid-template-columns: 1.2fr 1fr;
            gap: 40px;
            align-items: center;
        }

        .cta-content {
            color: var(--white);
        }

        .cta-content h2 {
            font-size: 2rem;
            font-weight: 800;
            margin-bottom: 16px;
            line-height: 1.3;
        }

        .cta-content p {
            color: rgba(255, 255, 255, 0.85);
            font-size: 0.95rem;
            line-height: 1.8;
            margin-bottom: 24px;
        }

        .cta-buttons {
            display: flex;
            gap: 14px;
            flex-wrap: wrap;
        }

        .cta-note {
            font-size: 0.8rem;
            color: rgba(255, 255, 255, 0.6);
            margin-top: 16px;
        }

        .cta-card {
            background: rgba(255, 255, 255, 0.1);
            backdrop-filter: blur(12px);
            border: 1px solid rgba(255, 255, 255, 0.2);
            border-radius: var(--radius-lg);
            padding: 32px;
            color: var(--white);
        }

        .cta-card h4 {
            font-size: 1.1rem;
            font-weight: 700;
            margin-bottom: 12px;
        }

        .cta-card ul {
            display: grid;
            gap: 10px;
            margin-bottom: 20px;
        }

        .cta-card li {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 0.85rem;
            color: rgba(255, 255, 255, 0.85);
        }

        .cta-card li i {
            color: #4ade80;
            font-size: 0.8rem;
        }

        .cta-link {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            color: var(--white);
            font-weight: 600;
            font-size: 0.9rem;
            border-bottom: 1px solid rgba(255, 255, 255, 0.5);
            padding-bottom: 2px;
            transition: gap var(--transition);
        }

        .cta-link:hover {
            gap: 12px;
        }

        /* Footer */
        .site-footer {
            background: var(--primary);
            color: #94a3b8;
            padding-top: 60px;
        }

        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr 1.2fr;
            gap: 40px;
            padding-bottom: 40px;
        }

        .footer-about .footer-logo {
            color: var(--white);
            margin-bottom: 16px;
        }

        .footer-about p {
            font-size: 0.87rem;
            line-height: 1.8;
            max-width: 320px;
            color: #64748b;
        }

        .footer-title {
            font-size: 0.9rem;
            font-weight: 700;
            color: var(--white);
            margin-bottom: 18px;
            letter-spacing: 0.3px;
        }

        .footer-links {
            display: grid;
            gap: 10px;
        }

        .footer-links a {
            font-size: 0.83rem;
            color: #64748b;
            transition: color var(--transition);
            display: inline-flex;
            align-items: center;
            gap: 8px;
        }

        .footer-links a:hover {
            color: var(--accent);
        }

        .footer-links a i {
            font-size: 0.65rem;
        }

        .footer-contact {
            display: grid;
            gap: 14px;
        }

        .footer-contact-item {
            display: flex;
            align-items: flex-start;
            gap: 10px;
            font-size: 0.83rem;
            color: #64748b;
        }

        .footer-contact-item i {
            color: var(--accent);
            margin-top: 3px;
        }

        .footer-bottom {
            border-top: 1px solid rgba(148, 163, 184, 0.1);
            padding: 20px 0;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 16px;
            font-size: 0.78rem;
            color: #475569;
            flex-wrap: wrap;
        }

        .flash {
            display: inline-flex;
            align-items: center;
            gap: 6px;
        }

        .flash i {
            color: #f59e0b;
            font-size: 0.7rem;
        }

        /* Mobile Toggle */
        .mobile-toggle {
            display: none;
            width: 42px;
            height: 42px;
            border-radius: 10px;
            border: 1px solid var(--border);
            align-items: center;
            justify-content: center;
            color: var(--text);
            font-size: 1.1rem;
            background: var(--white);
            transition: all var(--transition);
        }

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

        /* Responsive */
        @media (max-width: 1024px) {
            .hero .container {
                grid-template-columns: 1fr;
                gap: 40px;
            }

            .hero-visual {
                max-width: 520px;
            }

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

            .news-wrapper {
                grid-template-columns: 1fr;
            }

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

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

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

            .guide-image {
                order: -1;
            }

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

            .cta-section .container {
                grid-template-columns: 1fr;
            }
        }

        @media (max-width: 768px) {
            .section {
                padding: 60px 0;
            }

            .header-tools .header-search {
                display: none;
            }

            .hero h1 {
                font-size: 2.1rem;
            }

            .hero-stats {
                grid-template-columns: repeat(3, 1fr);
            }

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

            .nav-tabs a {
                padding: 7px 14px;
                font-size: 0.85rem;
            }

            .footer-grid {
                grid-template-columns: 1fr;
                gap: 32px;
            }

            .footer-bottom {
                flex-direction: column;
                text-align: center;
            }
        }

        @media (max-width: 520px) {
            .container {
                padding: 0 16px;
            }

            .hero {
                padding: 60px 0;
            }

            .hero h1 {
                font-size: 1.8rem;
            }

            .hero p {
                font-size: 0.95rem;
            }

            .hero-actions {
                flex-direction: column;
                width: 100%;
            }

            .hero-actions .btn-primary,
            .hero-actions .btn-outline {
                width: 100%;
            }

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

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

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

            .mobile-toggle {
                display: flex;
            }

            .header-nav {
                display: none;
            }

            .header-nav.open {
                display: block;
            }

            .section-head h2 {
                font-size: 1.6rem;
            }

            .hero-stats {
                grid-template-columns: 1fr 1fr 1fr;
                gap: 8px;
            }

            .stat-number {
                font-size: 1.2rem;
            }

            .stat-label {
                font-size: 0.7rem;
            }
        }

        @media (max-width: 400px) {
            .hero-stats {
                grid-template-columns: 1fr;
            }
        }

/* roulang page: category1 */
:root {
            --primary: #0c2d4a;
            --primary-light: #17456e;
            --primary-dark: #071c30;
            --accent: #00b4d8;
            --accent-rgb: 0, 180, 216;
            --accent-dark: #0090ad;
            --gold: #f0a92e;
            --success: #22c55e;
            --bg-body: #f4f7fb;
            --bg-white: #ffffff;
            --bg-dark: #0b1f33;
            --text-main: #16283a;
            --text-muted: #587186;
            --text-light: #94a9ba;
            --border: #dfe8f0;
            --radius-lg: 18px;
            --radius-md: 12px;
            --radius-sm: 8px;
            --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.05);
            --shadow-md: 0 8px 28px rgba(0, 0, 0, 0.08);
            --shadow-lg: 0 16px 48px rgba(0, 0, 0, 0.13);
            --transition: all .3s ease;
            --container-width: 1200px;
        }
        *,
        *::before,
        *::after {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
        }
        html {
            scroll-behavior: smooth;
            -webkit-text-size-adjust: 100%;
        }
        body {
            font-family: "PingFang SC", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
            background: var(--bg-body);
            color: var(--text-main);
            line-height: 1.75;
            -webkit-font-smoothing: antialiased;
        }
        img {
            max-width: 100%;
            display: block;
        }
        a {
            color: var(--text-main);
            text-decoration: none;
            transition: var(--transition);
        }
        a:hover {
            color: var(--accent-dark);
        }
        button,
        input {
            font-family: inherit;
            border: none;
            outline: none;
            background: none;
        }
        ul,
        ol {
            list-style: none;
        }
        ::selection {
            background: rgba(var(--accent-rgb), 0.25);
        }
        .container {
            width: 100%;
            max-width: var(--container-width);
            margin: 0 auto;
            padding-left: 24px;
            padding-right: 24px;
        }
        .section {
            padding: 80px 0;
        }
        .section-alt {
            background: var(--bg-white);
        }
        .section-head {
            text-align: center;
            max-width: 720px;
            margin: 0 auto 52px;
        }
        .section-head .section-tag {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            background: rgba(var(--accent-rgb), 0.1);
            color: var(--accent-dark);
            font-size: 13px;
            font-weight: 700;
            padding: 6px 16px;
            border-radius: 40px;
            letter-spacing: 1px;
            margin-bottom: 16px;
        }
        .section-head h2 {
            font-size: 32px;
            color: var(--primary);
            line-height: 1.35;
            letter-spacing: -0.5px;
            margin-bottom: 12px;
        }
        .section-head p {
            color: var(--text-muted);
            font-size: 16px;
        }
        /* ===== Buttons ===== */
        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            padding: 12px 28px;
            border-radius: 40px;
            font-size: 15px;
            font-weight: 600;
            cursor: pointer;
            transition: var(--transition);
            border: 2px solid transparent;
            line-height: 1.4;
            white-space: nowrap;
        }
        .btn-primary {
            background: linear-gradient(135deg, var(--accent), var(--accent-dark));
            color: #fff;
            box-shadow: 0 4px 18px rgba(var(--accent-rgb), 0.35);
        }
        .btn-primary:hover {
            transform: translateY(-2px);
            box-shadow: 0 8px 26px rgba(var(--accent-rgb), 0.45);
            color: #fff;
        }
        .btn-outline {
            background: rgba(255, 255, 255, 0.12);
            border-color: rgba(255, 255, 255, 0.65);
            color: #fff;
            backdrop-filter: blur(4px);
        }
        .btn-outline:hover {
            background: rgba(255, 255, 255, 0.22);
            border-color: #fff;
            color: #fff;
            transform: translateY(-2px);
        }
        .btn-dark {
            background: var(--primary);
            color: #fff;
        }
        .btn-dark:hover {
            background: var(--primary-light);
            transform: translateY(-2px);
            box-shadow: var(--shadow-md);
            color: #fff;
        }
        .btn:active {
            transform: scale(0.97);
        }
        /* ===== Header ===== */
        .site-header {
            position: sticky;
            top: 0;
            z-index: 100;
            background: rgba(255, 255, 255, 0.92);
            backdrop-filter: blur(14px);
            border-bottom: 1px solid var(--border);
            box-shadow: 0 2px 12px rgba(0, 0, 0, 0.04);
        }
        .header-top {
            border-bottom: 1px solid rgba(0, 0, 0, 0.04);
            background: var(--primary);
            color: #fff;
        }
        .header-top-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 56px;
        }
        .logo {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 20px;
            font-weight: 800;
            color: var(--primary);
            letter-spacing: -0.5px;
            flex-shrink: 0;
        }
        .header-top .logo {
            color: #fff;
        }
        .logo-icon {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 38px;
            height: 38px;
            background: linear-gradient(135deg, var(--accent), var(--gold));
            border-radius: 10px;
            color: #fff;
            font-size: 18px;
            box-shadow: 0 4px 12px rgba(var(--accent-rgb), 0.35);
        }
        .logo em {
            font-style: normal;
            color: var(--accent);
            font-weight: 700;
        }
        .header-top .logo em {
            color: #ffd166;
        }
        .header-actions {
            display: flex;
            align-items: center;
            gap: 14px;
        }
        .search-box {
            display: flex;
            align-items: center;
            background: rgba(255, 255, 255, 0.14);
            border-radius: 40px;
            padding: 0 6px 0 16px;
            height: 36px;
            width: 260px;
            border: 1px solid rgba(255, 255, 255, 0.22);
            transition: var(--transition);
        }
        .search-box:focus-within {
            background: rgba(255, 255, 255, 0.24);
            border-color: var(--accent);
        }
        .search-box input {
            flex: 1;
            color: #fff;
            font-size: 14px;
            background: transparent;
        }
        .search-box input::placeholder {
            color: rgba(255, 255, 255, 0.65);
        }
        .search-box button {
            width: 28px;
            height: 28px;
            border-radius: 50%;
            color: #fff;
            font-size: 13px;
            cursor: pointer;
            display: flex;
            align-items: center;
            justify-content: center;
            background: var(--accent);
            transition: var(--transition);
        }
        .search-box button:hover {
            background: var(--accent-dark);
        }
        .header-top .btn-sm {
            padding: 7px 18px;
            font-size: 13px;
            background: var(--accent);
            color: #fff;
            border: none;
        }
        .header-top .btn-sm:hover {
            background: var(--accent-dark);
        }
        .header-bottom {
            background: #fff;
        }
        .header-bottom .container {
            display: flex;
            align-items: center;
            min-height: 50px;
        }
        .nav-tabs {
            display: flex;
            align-items: center;
            gap: 6px;
            overflow-x: auto;
            scrollbar-width: none;
            width: 100%;
        }
        .nav-tabs::-webkit-scrollbar {
            display: none;
        }
        .nav-tabs a {
            display: inline-flex;
            align-items: center;
            gap: 7px;
            padding: 9px 22px;
            border-radius: 40px;
            font-size: 14px;
            font-weight: 600;
            color: var(--text-muted);
            white-space: nowrap;
            border: 1px solid transparent;
            transition: var(--transition);
        }
        .nav-tabs a i {
            font-size: 13px;
        }
        .nav-tabs a:hover {
            color: var(--primary);
            background: var(--bg-body);
        }
        .nav-tabs a.active {
            background: var(--primary);
            color: #fff;
            box-shadow: 0 4px 16px rgba(12, 45, 74, 0.3);
        }
        /* ===== Page Banner ===== */
        .page-banner {
            position: relative;
            padding: 110px 0;
            background-size: cover;
            background-position: center;
            text-align: center;
            isolation: isolate;
        }
        .page-banner::before {
            content: "";
            position: absolute;
            inset: 0;
            background: linear-gradient(135deg, rgba(7, 28, 48, 0.88), rgba(12, 45, 74, 0.68));
            z-index: -1;
        }
        .banner-badge {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            background: rgba(255, 255, 255, 0.14);
            border: 1px solid rgba(255, 255, 255, 0.3);
            color: #fff;
            padding: 6px 18px;
            border-radius: 40px;
            font-size: 12px;
            font-weight: 700;
            letter-spacing: 1.5px;
            margin-bottom: 20px;
        }
        .banner-badge i {
            color: var(--gold);
        }
        .page-banner h1 {
            font-size: 46px;
            color: #fff;
            font-weight: 800;
            letter-spacing: -1px;
            line-height: 1.25;
            margin-bottom: 16px;
        }
        .page-banner h1 span {
            color: #ffd166;
        }
        .page-banner p {
            font-size: 17px;
            color: rgba(255, 255, 255, 0.85);
            max-width: 600px;
            margin: 0 auto 32px;
            line-height: 1.8;
        }
        .banner-actions {
            display: flex;
            gap: 14px;
            justify-content: center;
            flex-wrap: wrap;
        }
        .banner-actions .btn-primary {
            background: linear-gradient(135deg, var(--accent), var(--accent-dark));
            box-shadow: 0 6px 22px rgba(var(--accent-rgb), 0.45);
        }
        .breadcrumb {
            display: flex;
            justify-content: center;
            align-items: center;
            gap: 8px;
            color: rgba(255, 255, 255, 0.6);
            font-size: 13px;
            margin-top: 22px;
            flex-wrap: wrap;
        }
        .breadcrumb a {
            color: rgba(255, 255, 255, 0.8);
        }
        .breadcrumb a:hover {
            color: #fff;
        }
        .breadcrumb i {
            font-size: 10px;
        }
        /* ===== Features ===== */
        .features-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 24px;
        }
        .feature-card {
            background: var(--bg-white);
            border: 1px solid var(--border);
            border-radius: var(--radius-lg);
            padding: 36px 30px;
            transition: var(--transition);
            position: relative;
            overflow: hidden;
        }
        .feature-card::after {
            content: "";
            position: absolute;
            width: 90px;
            height: 90px;
            background: radial-gradient(circle, rgba(var(--accent-rgb), 0.12), transparent 70%);
            top: -20px;
            right: -20px;
            border-radius: 50%;
            transition: var(--transition);
        }
        .feature-card:hover {
            transform: translateY(-6px);
            box-shadow: var(--shadow-md);
            border-color: rgba(var(--accent-rgb), 0.3);
        }
        .feature-card:hover::after {
            transform: scale(1.6);
        }
        .feature-icon {
            width: 56px;
            height: 56px;
            border-radius: 14px;
            display: inline-flex;
            align-items: center;
            justify-content: center;
            font-size: 22px;
            margin-bottom: 20px;
            background: linear-gradient(135deg, rgba(var(--accent-rgb), 0.15), rgba(var(--accent-rgb), 0.05));
            color: var(--accent-dark);
        }
        .feature-card h3 {
            font-size: 18px;
            color: var(--primary);
            margin-bottom: 10px;
            font-weight: 700;
        }
        .feature-card p {
            font-size: 14px;
            color: var(--text-muted);
            line-height: 1.8;
        }
        /* ===== Categories ===== */
        .cat-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 26px;
        }
        .cat-card {
            background: var(--bg-white);
            border-radius: var(--radius-lg);
            overflow: hidden;
            border: 1px solid var(--border);
            transition: var(--transition);
            position: relative;
        }
        .cat-card:hover {
            transform: translateY(-8px);
            box-shadow: var(--shadow-lg);
            border-color: rgba(var(--accent-rgb), 0.35);
        }
        .cat-card-cover {
            position: relative;
            height: 185px;
            overflow: hidden;
        }
        .cat-card-cover img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform .5s ease;
        }
        .cat-card:hover .cat-card-cover img {
            transform: scale(1.06);
        }
        .cat-card-cover::after {
            content: "";
            position: absolute;
            inset: 0;
            background: linear-gradient(to top, rgba(7, 28, 48, 0.55), transparent 60%);
        }
        .cat-badge {
            position: absolute;
            top: 14px;
            left: 14px;
            z-index: 2;
            background: var(--gold);
            color: #fff;
            font-size: 12px;
            font-weight: 700;
            padding: 4px 14px;
            border-radius: 20px;
            box-shadow: 0 4px 12px rgba(0, 0, 0, 0.18);
        }
        .cat-card-body {
            padding: 24px;
        }
        .cat-card-body h3 {
            font-size: 19px;
            color: var(--primary);
            font-weight: 700;
            margin-bottom: 8px;
        }
        .cat-card-body p {
            font-size: 14px;
            color: var(--text-muted);
            margin-bottom: 16px;
            line-height: 1.7;
        }
        .cat-card-meta {
            display: flex;
            justify-content: space-between;
            align-items: center;
            font-size: 13px;
            color: var(--text-light);
        }
        .cat-card-meta .cat-link {
            display: inline-flex;
            align-items: center;
            gap: 5px;
            color: var(--accent-dark);
            font-weight: 600;
        }
        .cat-card-meta .cat-link:hover {
            gap: 9px;
        }
        /* ===== Guide List ===== */
        .guide-list-wrap {
            background: var(--bg-white);
            border-radius: var(--radius-lg);
            border: 1px solid var(--border);
            box-shadow: var(--shadow-sm);
            padding: 10px 0;
            overflow: hidden;
        }
        .guide-item {
            display: flex;
            align-items: center;
            gap: 20px;
            padding: 22px 28px;
            border-bottom: 1px solid var(--border);
            transition: var(--transition);
        }
        .guide-item:last-child {
            border-bottom: none;
        }
        .guide-item:hover {
            background: rgba(var(--accent-rgb), 0.04);
        }
        .guide-index {
            width: 40px;
            height: 40px;
            border-radius: 10px;
            background: rgba(var(--accent-rgb), 0.1);
            color: var(--accent-dark);
            display: flex;
            align-items: center;
            justify-content: center;
            font-weight: 800;
            font-size: 15px;
            flex-shrink: 0;
        }
        .guide-item:nth-child(1) .guide-index {
            background: var(--gold);
            color: #fff;
        }
        .guide-item:nth-child(2) .guide-index {
            background: var(--primary);
            color: #fff;
        }
        .guide-info {
            flex: 1;
        }
        .guide-info h3 {
            font-size: 16px;
            font-weight: 600;
            color: var(--text-main);
            margin-bottom: 4px;
            transition: var(--transition);
        }
        .guide-item:hover .guide-info h3 {
            color: var(--accent-dark);
        }
        .guide-info span {
            font-size: 13px;
            color: var(--text-light);
        }
        .guide-stats {
            display: flex;
            align-items: center;
            gap: 18px;
            font-size: 13px;
            color: var(--text-muted);
            flex-shrink: 0;
        }
        .guide-stats i {
            color: var(--gold);
            margin-right: 4px;
        }
        .guide-arrow {
            color: var(--border);
            transition: var(--transition);
            font-size: 14px;
        }
        .guide-item:hover .guide-arrow {
            color: var(--accent);
            transform: translateX(4px);
        }
        /* ===== Stats ===== */
        .stats-section {
            background: var(--bg-dark);
            position: relative;
            overflow: hidden;
        }
        .stats-section::before {
            content: "";
            position: absolute;
            top: -70px;
            right: -70px;
            width: 220px;
            height: 220px;
            border-radius: 50%;
            background: radial-gradient(circle, rgba(var(--accent-rgb), 0.2), transparent 70%);
        }
        .stats-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 40px;
            text-align: center;
        }
        .stats-item {
            padding: 30px 20px;
            border-radius: var(--radius-md);
            background: rgba(255, 255, 255, 0.04);
            border: 1px solid rgba(255, 255, 255, 0.07);
            transition: var(--transition);
        }
        .stats-item:hover {
            background: rgba(255, 255, 255, 0.08);
            transform: translateY(-4px);
        }
        .stats-number {
            font-size: 44px;
            font-weight: 800;
            color: #fff;
            line-height: 1.2;
            letter-spacing: -1px;
        }
        .stats-number em {
            font-style: normal;
            color: var(--gold);
            font-size: 22px;
            margin-left: 2px;
            vertical-align: super;
        }
        .stats-label {
            font-size: 14px;
            color: rgba(255, 255, 255, 0.6);
            margin-top: 10px;
            letter-spacing: 1px;
        }
        /* ===== Steps ===== */
        .steps-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 28px;
        }
        .step-card {
            background: var(--bg-white);
            border: 1px solid var(--border);
            border-radius: var(--radius-lg);
            padding: 34px 26px;
            text-align: center;
            position: relative;
            transition: var(--transition);
        }
        .step-card:hover {
            transform: translateY(-6px);
            box-shadow: var(--shadow-md);
        }
        .step-num {
            width: 48px;
            height: 48px;
            border-radius: 50%;
            background: linear-gradient(135deg, var(--accent), var(--accent-dark));
            color: #fff;
            font-size: 18px;
            font-weight: 800;
            display: flex;
            align-items: center;
            justify-content: center;
            margin: 0 auto 20px;
            box-shadow: 0 6px 18px rgba(var(--accent-rgb), 0.3);
        }
        .step-card h3 {
            font-size: 16px;
            font-weight: 700;
            color: var(--primary);
            margin-bottom: 10px;
        }
        .step-card p {
            font-size: 13px;
            color: var(--text-muted);
            line-height: 1.7;
        }
        /* ===== FAQ ===== */
        .faq-list {
            max-width: 820px;
            margin: 0 auto;
        }
        .faq-item {
            background: var(--bg-white);
            border: 1px solid var(--border);
            border-radius: var(--radius-md);
            margin-bottom: 14px;
            overflow: hidden;
            transition: var(--transition);
        }
        .faq-item:hover {
            border-color: rgba(var(--accent-rgb), 0.3);
        }
        .faq-question {
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding: 20px 26px;
            cursor: pointer;
            font-size: 15px;
            font-weight: 600;
            color: var(--text-main);
            gap: 14px;
        }
        .faq-question .faq-icon {
            width: 30px;
            height: 30px;
            border-radius: 50%;
            background: rgba(var(--accent-rgb), 0.1);
            color: var(--accent-dark);
            display: flex;
            align-items: center;
            justify-content: center;
            flex-shrink: 0;
            font-size: 12px;
            transition: var(--transition);
        }
        .faq-item.active .faq-icon {
            transform: rotate(180deg);
            background: var(--accent);
            color: #fff;
        }
        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.4s ease;
        }
        .faq-answer-inner {
            padding: 0 26px 22px;
            color: var(--text-muted);
            font-size: 14px;
            line-height: 1.8;
            border-top: 1px dashed var(--border);
            padding-top: 16px;
        }
        /* ===== CTA ===== */
        .cta-section {
            background: linear-gradient(135deg, var(--primary), var(--primary-light));
            border-radius: var(--radius-lg);
            margin: 0 auto;
            overflow: hidden;
            position: relative;
            padding: 56px 48px;
            text-align: center;
        }
        .cta-section::before {
            content: "";
            position: absolute;
            inset: 0;
            background: radial-gradient(ellipse at top right, rgba(var(--accent-rgb), 0.25), transparent 50%);
        }
        .cta-section h2 {
            font-size: 32px;
            color: #fff;
            margin-bottom: 14px;
            position: relative;
            font-weight: 800;
            letter-spacing: -0.5px;
        }
        .cta-section p {
            color: rgba(255, 255, 255, 0.8);
            max-width: 540px;
            margin: 0 auto 32px;
            font-size: 15px;
            position: relative;
        }
        .cta-section .btn {
            position: relative;
            font-size: 16px;
            padding: 14px 36px;
        }
        /* ===== Footer ===== */
        .site-footer {
            background: var(--bg-dark);
            color: rgba(255, 255, 255, 0.7);
            padding: 70px 0 0;
            margin-top: 80px;
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 1.4fr 1fr 1fr 1.2fr;
            gap: 44px;
            padding-bottom: 44px;
            border-bottom: 1px solid rgba(255, 255, 255, 0.08);
        }
        .footer-logo {
            margin-bottom: 16px;
            font-size: 22px;
        }
        .footer-logo .logo-icon {
            width: 42px;
            height: 42px;
        }
        .footer-about p {
            font-size: 14px;
            line-height: 1.9;
            color: rgba(255, 255, 255, 0.55);
        }
        .footer-title {
            font-size: 16px;
            font-weight: 700;
            color: #fff;
            margin-bottom: 18px;
            position: relative;
            padding-bottom: 10px;
        }
        .footer-title::after {
            content: "";
            position: absolute;
            left: 0;
            bottom: 0;
            width: 32px;
            height: 3px;
            border-radius: 3px;
            background: var(--accent);
        }
        .footer-links {
            display: flex;
            flex-direction: column;
            gap: 10px;
        }
        .footer-links a {
            color: rgba(255, 255, 255, 0.6);
            font-size: 14px;
            display: inline-flex;
            align-items: center;
            gap: 8px;
            transition: var(--transition);
        }
        .footer-links a i {
            font-size: 10px;
            color: var(--accent);
        }
        .footer-links a:hover {
            color: #fff;
            padding-left: 4px;
        }
        .footer-contact {
            display: flex;
            flex-direction: column;
            gap: 12px;
        }
        .footer-contact-item {
            display: flex;
            align-items: center;
            gap: 12px;
            font-size: 14px;
            color: rgba(255, 255, 255, 0.6);
        }
        .footer-contact-item i {
            width: 32px;
            height: 32px;
            border-radius: 50%;
            background: rgba(255, 255, 255, 0.08);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 13px;
            color: var(--accent);
            flex-shrink: 0;
        }
        .footer-bottom {
            display: flex;
            justify-content: space-between;
            align-items: center;
            flex-wrap: wrap;
            gap: 12px;
            padding: 24px 0;
            font-size: 13px;
            color: rgba(255, 255, 255, 0.42);
        }
        .footer-bottom .flash {
            display: flex;
            align-items: center;
            gap: 8px;
            color: rgba(255, 255, 255, 0.5);
        }
        .footer-bottom .flash i {
            color: var(--gold);
        }
        /* ===== Responsive ===== */
        @media (max-width: 1024px) {
            .features-grid {
                grid-template-columns: repeat(3, 1fr);
                gap: 18px;
            }
            .cat-grid {
                grid-template-columns: repeat(2, 1fr);
                gap: 20px;
            }
            .steps-grid {
                grid-template-columns: repeat(2, 1fr);
                gap: 20px;
            }
            .footer-grid {
                grid-template-columns: 1fr 1fr;
            }
        }
        @media (max-width: 768px) {
            .section {
                padding: 56px 0;
            }
            .section-head h2 {
                font-size: 26px;
            }
            .search-box {
                width: 160px;
            }
            .header-top .btn-sm {
                display: none;
            }
            .page-banner {
                padding: 80px 0;
            }
            .page-banner h1 {
                font-size: 32px;
            }
            .features-grid {
                grid-template-columns: 1fr;
            }
            .stats-grid {
                grid-template-columns: repeat(2, 1fr);
                gap: 16px;
            }
            .guide-item {
                padding: 16px 18px;
                flex-wrap: wrap;
                gap: 10px;
            }
            .guide-stats {
                gap: 10px;
                font-size: 12px;
            }
            .guide-arrow {
                display: none;
            }
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 32px;
            }
            .footer-bottom {
                justify-content: center;
                text-align: center;
            }
            .cta-section {
                padding: 40px 24px;
            }
            .cta-section h2 {
                font-size: 24px;
            }
        }
        @media (max-width: 520px) {
            .container {
                padding-left: 16px;
                padding-right: 16px;
            }
            .cat-grid {
                grid-template-columns: 1fr;
            }
            .steps-grid {
                grid-template-columns: 1fr;
            }
            .stats-grid {
                grid-template-columns: 1fr;
            }
            .search-box {
                width: 110px;
            }
            .search-box input {
                font-size: 12px;
            }
            .nav-tabs a {
                padding: 8px 14px;
                font-size: 13px;
            }
            .page-banner h1 {
                font-size: 28px;
            }
            .page-banner p {
                font-size: 15px;
            }
            .banner-actions .btn {
                padding: 10px 20px;
                font-size: 14px;
            }
        }

/* roulang page: article */
:root {
  --primary: #1a5cff;
  --primary-dark: #0d3db8;
  --primary-deep: #0b1f3a;
  --primary-light: #eef3ff;
  --accent: #ff7a1a;
  --accent-light: #fff3eb;
  --dark: #101828;
  --text: #344054;
  --text-light: #667085;
  --bg: #f6f8fc;
  --white: #ffffff;
  --border: #e4e7ec;
  --radius-lg: 20px;
  --radius-md: 14px;
  --radius-sm: 10px;
  --shadow-sm: 0 2px 8px rgba(16,24,40,.05);
  --shadow-md: 0 6px 24px rgba(16,24,40,.08);
  --shadow-lg: 0 16px 48px rgba(16,24,40,.12);
  --space-section: 90px;
  --font: -apple-system, BlinkMacSystemFont, "PingFang SC", "Microsoft YaHei", "Segoe UI", Roboto, sans-serif;
}

* { margin: 0; padding: 0; box-sizing: border-box; }
body { font-family: var(--font); color: var(--text); background: var(--bg); line-height: 1.7; -webkit-font-smoothing: antialiased; }
img { max-width: 100%; display: block; }
a { text-decoration: none; color: inherit; transition: all .25s ease; }
button, input { font-family: inherit; border: none; outline: none; background: none; }
ul, ol { list-style: none; }

.container { max-width: 1200px; margin: 0 auto; padding: 0 24px; }

.btn { display: inline-flex; align-items: center; justify-content: center; gap: 8px; padding: 12px 28px; border-radius: 999px; font-size: 15px; font-weight: 600; cursor: pointer; transition: all .3s ease; border: 2px solid transparent; line-height: 1.4; }
.btn-primary { background: var(--primary); color: #fff; box-shadow: 0 6px 20px rgba(26,92,255,.25); }
.btn-primary:hover { background: var(--primary-dark); transform: translateY(-2px); box-shadow: 0 10px 30px rgba(26,92,255,.35); }
.btn-outline { background: transparent; color: var(--primary); border-color: var(--primary); }
.btn-outline:hover { background: var(--primary); color: #fff; transform: translateY(-2px); box-shadow: 0 8px 24px rgba(26,92,255,.25); }
.btn-light { background: #fff; color: var(--primary-dark); box-shadow: 0 4px 16px rgba(0,0,0,.1); }
.btn-light:hover { background: var(--primary-light); transform: translateY(-2px); }
.btn-sm { padding: 9px 22px; font-size: 14px; }
.btn-block { display: flex; width: 100%; }

.section-head { text-align: center; max-width: 640px; margin: 0 auto 50px; }
.section-tag { display: inline-block; padding: 6px 18px; border-radius: 999px; background: var(--primary-light); color: var(--primary); font-size: 13px; font-weight: 600; letter-spacing: 1px; margin-bottom: 16px; }
.section-head h2 { font-size: 34px; color: var(--dark); font-weight: 700; margin-bottom: 12px; line-height: 1.3; }
.section-head p { color: var(--text-light); font-size: 16px; }

/* ===== Header ===== */
.site-header { background: var(--white); border-bottom: 1px solid var(--border); position: sticky; top: 0; z-index: 100; box-shadow: 0 2px 12px rgba(16,24,40,.04); }
.header-top { padding: 16px 0; }
.header-flex { display: flex; align-items: center; justify-content: space-between; gap: 24px; }

.logo { display: flex; align-items: center; gap: 12px; flex-shrink: 0; }
.logo-icon { width: 42px; height: 42px; border-radius: 12px; background: linear-gradient(135deg, var(--primary), var(--primary-dark)); display: flex; align-items: center; justify-content: center; color: #fff; font-size: 18px; box-shadow: 0 6px 16px rgba(26,92,255,.3); }
.logo-text { font-size: 22px; font-weight: 800; color: var(--dark); letter-spacing: .5px; line-height: 1.2; }
.logo-mark { font-style: normal; color: var(--primary); }

.header-search { display: flex; align-items: center; background: var(--bg); border-radius: 999px; padding: 4px 4px 4px 20px; border: 1px solid var(--border); transition: all .3s; max-width: 420px; flex: 1; }
.header-search:focus-within { border-color: var(--primary); box-shadow: 0 0 0 4px rgba(26,92,255,.1); }
.header-search input { flex: 1; font-size: 14px; padding: 8px 0; background: transparent; color: var(--text); }
.header-search input::placeholder { color: var(--text-light); }
.header-search button { width: 40px; height: 40px; border-radius: 999px; background: var(--primary); color: #fff; display: flex; align-items: center; justify-content: center; transition: all .3s; cursor: pointer; }
.header-search button:hover { background: var(--primary-dark); }

.header-cta { flex-shrink: 0; }

/* Nav Tabs */
.nav-tabs-wrap { background: var(--white); border-top: 1px solid var(--border); }
.nav-tabs { display: flex; align-items: center; gap: 6px; overflow-x: auto; padding: 0; scrollbar-width: none; }
.nav-tabs::-webkit-scrollbar { display: none; }
.nav-tabs a { display: inline-flex; align-items: center; gap: 8px; padding: 14px 22px; font-size: 15px; font-weight: 600; color: var(--text); border-bottom: 3px solid transparent; white-space: nowrap; transition: all .3s; }
.nav-tabs a i { color: var(--text-light); transition: color .3s; }
.nav-tabs a:hover { color: var(--primary); }
.nav-tabs a:hover i { color: var(--primary); }
.nav-tabs a.active { color: var(--primary); border-bottom-color: var(--primary); }
.nav-tabs a.active i { color: var(--primary); }

/* ===== Page Hero ===== */
.page-hero { position: relative; padding: 90px 0 80px; background: linear-gradient(135deg, #0b1f3a 0%, #143a6d 55%, #1a5cff 100%); overflow: hidden; }
.page-hero::before { content: ''; position: absolute; inset: 0; background: url('/assets/images/backpic/back-1.png') center / cover no-repeat; opacity: .18; }
.page-hero::after { content: ''; position: absolute; top: -60%; right: -20%; width: 600px; height: 600px; background: radial-gradient(circle, rgba(255,255,255,.06) 0%, transparent 70%); border-radius: 50%; }
.page-hero .container { position: relative; z-index: 2; }

.breadcrumb { display: flex; align-items: center; gap: 10px; font-size: 14px; color: rgba(255,255,255,.7); margin-bottom: 24px; }
.breadcrumb a { color: rgba(255,255,255,.7); }
.breadcrumb a:hover { color: #fff; }
.breadcrumb .sep { opacity: .5; }
.breadcrumb .current { color: rgba(255,255,255,.9); }

.page-hero h1 { font-size: 40px; font-weight: 800; color: #fff; line-height: 1.3; margin-bottom: 20px; max-width: 800px; text-shadow: 0 2px 16px rgba(0,0,0,.2); }

.article-meta { display: flex; flex-wrap: wrap; gap: 20px; color: rgba(255,255,255,.85); font-size: 14px; }
.article-meta span { display: inline-flex; align-items: center; gap: 8px; }
.article-meta i { opacity: .8; }
.article-meta .meta-badge { background: rgba(255,255,255,.15); padding: 4px 14px; border-radius: 999px; font-weight: 600; backdrop-filter: blur(4px); }

/* ===== Article Section ===== */
.article-section { padding: var(--space-section) 0; }
.article-layout { display: grid; grid-template-columns: minmax(0,1fr) 340px; gap: 40px; align-items: start; }

.article-main { background: var(--white); border-radius: var(--radius-lg); box-shadow: var(--shadow-sm); padding: 48px; border: 1px solid var(--border); }

/* Article Body Typography */
.article-body { font-size: 16.5px; color: var(--text); }
.article-body h2 { font-size: 26px; color: var(--dark); margin: 36px 0 16px; padding-left: 16px; border-left: 4px solid var(--primary); line-height: 1.4; }
.article-body h3 { font-size: 21px; color: var(--dark); margin: 28px 0 14px; }
.article-body h4 { font-size: 18px; color: var(--dark); margin: 24px 0 12px; }
.article-body p { margin-bottom: 18px; line-height: 1.9; }
.article-body ul, .article-body ol { margin: 0 0 20px 24px; padding: 0; }
.article-body ul li { list-style: disc; margin-bottom: 8px; }
.article-body ol li { list-style: decimal; margin-bottom: 8px; }
.article-body a { color: var(--primary); border-bottom: 1px solid rgba(26,92,255,.3); }
.article-body a:hover { color: var(--primary-dark); border-bottom-color: var(--primary); }
.article-body img { border-radius: var(--radius-md); margin: 24px 0; box-shadow: var(--shadow-sm); }
.article-body blockquote { background: var(--primary-light); border-left: 4px solid var(--primary); padding: 20px 24px; border-radius: 0 var(--radius-md) var(--radius-md) 0; margin: 24px 0; color: var(--text); font-style: normal; }
.article-body blockquote p { margin: 0; }
.article-body strong { color: var(--dark); font-weight: 700; }
.article-body code { background: var(--bg); padding: 2px 8px; border-radius: 6px; font-family: monospace; font-size: 14px; color: var(--primary); }

/* Article Tags */
.article-tags { display: flex; flex-wrap: wrap; align-items: center; gap: 12px; margin-top: 40px; padding-top: 24px; border-top: 1px solid var(--border); }
.tag-label { font-size: 14px; font-weight: 600; color: var(--text-light); }
.article-tags a { display: inline-flex; align-items: center; gap: 6px; padding: 6px 16px; background: var(--bg); border: 1px solid var(--border); border-radius: 999px; font-size: 13px; color: var(--text); }
.article-tags a:hover { background: var(--primary-light); color: var(--primary); border-color: rgba(26,92,255,.3); }

/* Article Share */
.article-share { display: flex; align-items: center; gap: 16px; margin-top: 24px; color: var(--text-light); font-size: 14px; }
.article-share a { width: 40px; height: 40px; border-radius: 50%; background: var(--bg); border: 1px solid var(--border); display: flex; align-items: center; justify-content: center; color: var(--text-light); transition: all .3s; }
.article-share a:hover { background: var(--primary); color: #fff; border-color: var(--primary); transform: translateY(-3px); }

/* Article Not Found */
.article-notfound { text-align: center; padding: 80px 20px; }
.notfound-icon { width: 90px; height: 90px; margin: 0 auto 28px; border-radius: 50%; background: var(--primary-light); color: var(--primary); font-size: 36px; display: flex; align-items: center; justify-content: center; }
.article-notfound h2 { font-size: 28px; color: var(--dark); margin-bottom: 12px; }
.article-notfound p { color: var(--text-light); margin-bottom: 32px; }

/* ===== Sidebar ===== */
.article-sidebar { display: flex; flex-direction: column; gap: 24px; }
.sidebar-card { background: var(--white); border-radius: var(--radius-lg); padding: 28px; border: 1px solid var(--border); box-shadow: var(--shadow-sm); }
.sidebar-card-head { display: flex; align-items: center; gap: 10px; font-size: 17px; font-weight: 700; color: var(--dark); margin-bottom: 20px; padding-bottom: 16px; border-bottom: 2px solid var(--primary-light); }
.sidebar-card-head i { color: var(--primary); font-size: 18px; }

.sidebar-list { display: flex; flex-direction: column; gap: 4px; }
.sidebar-item { display: flex; gap: 12px; padding: 12px 10px; border-radius: var(--radius-sm); transition: background .3s; align-items: flex-start; }
.sidebar-item:hover { background: var(--primary-light); }
.sidebar-dot { width: 8px; height: 8px; border-radius: 50%; background: var(--primary); margin-top: 8px; flex-shrink: 0; }
.sidebar-item-title { font-size: 14px; font-weight: 600; color: var(--text); line-height: 1.5; display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden; }
.sidebar-item:hover .sidebar-item-title { color: var(--primary); }
.sidebar-item-meta { font-size: 12px; color: var(--text-light); margin-top: 4px; }
.sidebar-empty { color: var(--text-light); font-size: 14px; text-align: center; padding: 20px 0; }

.sidebar-guide p { font-size: 14px; color: var(--text-light); margin-bottom: 20px; line-height: 1.7; }
.sidebar-guide .btn i { font-size: 14px; }

/* ===== Related Section ===== */
.related-section { background: var(--bg); padding: var(--space-section) 0; border-top: 1px solid var(--border); }
.related-grid { display: grid; grid-template-columns: repeat(3,1fr); gap: 28px; }
.article-card { background: var(--white); border-radius: var(--radius-lg); overflow: hidden; border: 1px solid var(--border); box-shadow: var(--shadow-sm); transition: all .4s ease; display: flex; flex-direction: column; }
.article-card:hover { transform: translateY(-6px); box-shadow: var(--shadow-lg); border-color: rgba(26,92,255,.3); }
.article-card-cover { position: relative; overflow: hidden; aspect-ratio: 16/10; }
.article-card-cover img { width: 100%; height: 100%; object-fit: cover; transition: transform .5s ease; }
.article-card:hover .article-card-cover img { transform: scale(1.05); }
.card-cate { position: absolute; top: 14px; left: 14px; background: rgba(11,31,58,.85); color: #fff; padding: 5px 14px; border-radius: 999px; font-size: 12px; font-weight: 600; backdrop-filter: blur(6px); }
.article-card-body { padding: 24px; display: flex; flex-direction: column; flex: 1; }
.article-card-body h3 { font-size: 18px; font-weight: 700; color: var(--dark); line-height: 1.5; margin-bottom: 10px; display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden; }
.article-card-body p { font-size: 14px; color: var(--text-light); line-height: 1.7; margin-bottom: 18px; display: -webkit-box; -webkit-line-clamp: 3; -webkit-box-orient: vertical; overflow: hidden; }
.article-card-meta { display: flex; align-items: center; justify-content: space-between; margin-top: auto; padding-top: 16px; border-top: 1px solid var(--border); font-size: 13px; color: var(--text-light); }
.article-card-meta .read-more { color: var(--primary); font-weight: 600; display: inline-flex; align-items: center; gap: 6px; }
.article-card:hover .read-more i { transform: translateX(4px); }
.article-card-meta .read-more i { transition: transform .3s; }
.empty-tip { text-align: center; color: var(--text-light); padding: 60px 0; font-size: 16px; }

/* ===== FAQ Section ===== */
.faq-section { padding: var(--space-section) 0; background: var(--white); }
.faq-list { max-width: 820px; margin: 0 auto; display: flex; flex-direction: column; gap: 16px; }
.faq-item { border: 1px solid var(--border); border-radius: var(--radius-md); background: var(--white); transition: all .3s; overflow: hidden; }
.faq-item:hover { border-color: rgba(26,92,255,.25); box-shadow: var(--shadow-sm); }
.faq-item details[open] { border-color: rgba(26,92,255,.4); box-shadow: var(--shadow-md); }
.faq-item summary { display: flex; align-items: center; justify-content: space-between; gap: 16px; padding: 20px 24px; cursor: pointer; font-size: 16px; font-weight: 600; color: var(--dark); list-style: none; }
.faq-item summary::-webkit-details-marker { display: none; }
.faq-item summary:hover { color: var(--primary); }
.faq-icon { width: 32px; height: 32px; border-radius: 50%; background: var(--bg); display: flex; align-items: center; justify-content: center; color: var(--text-light); font-size: 14px; transition: all .4s; flex-shrink: 0; }
.faq-item details[open] .faq-icon { background: var(--primary); color: #fff; }
.faq-item details[open] .faq-icon i { transform: rotate(45deg); }
.faq-icon i { transition: transform .4s; }
.faq-content { padding: 0 24px 22px; color: var(--text-light); font-size: 15px; line-height: 1.8; }

/* ===== CTA ===== */
.cta-section { padding: var(--space-section) 0; background: linear-gradient(135deg, #0b1f3a, #1a5cff); position: relative; overflow: hidden; }
.cta-section::before { content: ''; position: absolute; inset: 0; background: url('/assets/images/backpic/back-3.png') center / cover; opacity: .12; }
.cta-inner { position: relative; z-index: 2; text-align: center; max-width: 720px; margin: 0 auto; }
.cta-inner .cta-eyebrow { color: rgba(255,255,255,.7); font-size: 14px; letter-spacing: 3px; margin-bottom: 20px; text-transform: uppercase; }
.cta-inner h2 { font-size: 38px; font-weight: 800; color: #fff; line-height: 1.3; margin-bottom: 18px; }
.cta-inner p { color: rgba(255,255,255,.85); font-size: 16px; margin-bottom: 36px; line-height: 1.8; }
.cta-buttons { display: flex; gap: 16px; justify-content: center; flex-wrap: wrap; }

/* ===== Footer ===== */
.site-footer { background: var(--primary-deep); color: rgba(255,255,255,.75); padding: 70px 0 0; }
.footer-grid { display: grid; grid-template-columns: 2fr 1fr 1fr 1.3fr; gap: 40px; padding-bottom: 48px; border-bottom: 1px solid rgba(255,255,255,.08); }
.footer-logo { margin-bottom: 20px; }
.footer-logo .logo-text { color: #fff; }
.footer-logo .logo-mark { color: #ffd166; }
.footer-about p { font-size: 14px; line-height: 1.8; color: rgba(255,255,255,.6); }
.footer-title { font-size: 16px; font-weight: 700; color: #fff; margin-bottom: 22px; position: relative; padding-bottom: 12px; }
.footer-title::after { content: ''; position: absolute; bottom: 0; left: 0; width: 32px; height: 3px; border-radius: 3px; background: var(--primary); }
.footer-links { display: flex; flex-direction: column; gap: 12px; }
.footer-links a { font-size: 14px; color: rgba(255,255,255,.65); display: inline-flex; align-items: center; gap: 8px; transition: all .3s; }
.footer-links a:hover { color: #fff; padding-left: 4px; }
.footer-links a i { font-size: 11px; color: var(--primary); }
.footer-contact { display: flex; flex-direction: column; gap: 14px; }
.footer-contact-item { display: flex; align-items: center; gap: 12px; font-size: 14px; color: rgba(255,255,255,.65); }
.footer-contact-item i { width: 36px; height: 36px; border-radius: 10px; background: rgba(255,255,255,.08); display: flex; align-items: center; justify-content: center; color: var(--primary); flex-shrink: 0; }
.footer-bottom { display: flex; align-items: center; justify-content: space-between; gap: 16px; flex-wrap: wrap; padding: 24px 0; font-size: 13px; color: rgba(255,255,255,.45); }
.footer-bottom .flash { display: inline-flex; align-items: center; gap: 8px; }
.footer-bottom .flash i { color: #ffd166; }

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

@media (max-width: 768px) {
  :root { --space-section: 60px; }
  .header-top { padding: 12px 0; }
  .header-flex { gap: 12px; }
  .header-search { display: none; }
  .header-cta { display: none; }
  .logo-text { font-size: 19px; }
  .page-hero { padding: 60px 0 50px; }
  .page-hero h1 { font-size: 28px; }
  .breadcrumb { font-size: 13px; flex-wrap: wrap; }
  .article-meta { gap: 12px; font-size: 13px; }
  .article-main { padding: 28px 22px; }
  .article-body { font-size: 15.5px; }
  .article-body h2 { font-size: 22px; }
  .related-grid { grid-template-columns: 1fr; }
  .section-head h2 { font-size: 26px; }
  .cta-inner h2 { font-size: 28px; }
  .faq-item summary { font-size: 15px; padding: 18px; }
  .faq-content { padding: 0 18px 20px; }
  .footer-grid { grid-template-columns: 1fr; gap: 32px; }
  .footer-bottom { flex-direction: column; text-align: center; justify-content: center; }
}

@media (max-width: 520px) {
  .container { padding: 0 16px; }
  .nav-tabs a { padding: 12px 16px; font-size: 14px; }
  .page-hero h1 { font-size: 24px; }
  .article-meta { flex-direction: column; align-items: flex-start; gap: 8px; }
  .cta-buttons { flex-direction: column; align-items: stretch; }
  .btn { width: 100%; text-align: center; }
  .article-tags { gap: 8px; }
  .article-tags a { padding: 5px 12px; font-size: 12px; }
  .related-grid { gap: 20px; }
  .article-card-body { padding: 20px; }
  .article-card-body h3 { font-size: 17px; }
  .footer-grid { grid-template-columns: 1fr; }
}