/* roulang page: index */
/* ===== Design Variables ===== */
        :root {
            --primary: #0f1a2e;
            --primary-light: #1a2d4a;
            --primary-dark: #080e1a;
            --secondary: #c9a94e;
            --secondary-light: #e0c56a;
            --secondary-dark: #a8882e;
            --bg: #ffffff;
            --bg-alt: #f5f7fa;
            --bg-dark: #0f1a2e;
            --text: #1e293b;
            --text-light: #64748b;
            --text-lighter: #94a3b8;
            --text-white: #ffffff;
            --border: #e2e8f0;
            --border-light: #f1f5f9;
            --shadow-sm: 0 1px 3px rgba(0,0,0,0.05);
            --shadow: 0 4px 20px rgba(0,0,0,0.08);
            --shadow-lg: 0 10px 40px rgba(0,0,0,0.12);
            --shadow-xl: 0 20px 60px rgba(0,0,0,0.18);
            --radius-sm: 8px;
            --radius: 12px;
            --radius-lg: 20px;
            --radius-xl: 28px;
            --transition: 0.3s cubic-bezier(0.4,0,0.2,1);
            --font: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
            --max-width: 1200px;
            --header-height: 80px;
        }

        /* ===== Reset & Base ===== */
        *, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
        html { scroll-behavior: smooth; -webkit-font-smoothing: antialiased; }
        body {
            font-family: var(--font);
            font-size: 16px;
            line-height: 1.6;
            color: var(--text);
            background: var(--bg);
            overflow-x: hidden;
        }
        img { max-width: 100%; height: auto; display: block; }
        a { color: inherit; text-decoration: none; transition: color var(--transition); }
        button { cursor: pointer; font-family: inherit; border: none; background: none; }
        input, textarea { font-family: inherit; outline: none; border: none; }
        ul, ol { list-style: none; }
        h1, h2, h3, h4, h5, h6 { line-height: 1.25; font-weight: 700; color: var(--text); }

        /* ===== Container ===== */
        .container {
            width: 100%;
            max-width: var(--max-width);
            margin: 0 auto;
            padding: 0 24px;
        }

        /* ===== Header & Navigation ===== */
        .header {
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            height: var(--header-height);
            background: rgba(255,255,255,0.95);
            backdrop-filter: blur(20px);
            -webkit-backdrop-filter: blur(20px);
            border-bottom: 1px solid var(--border-light);
            z-index: 1000;
            transition: background var(--transition), box-shadow var(--transition);
        }
        .header.scrolled {
            background: rgba(255,255,255,0.98);
            box-shadow: var(--shadow);
        }
        .header-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 100%;
            max-width: var(--max-width);
            margin: 0 auto;
            padding: 0 24px;
            gap: 24px;
        }
        .logo {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 24px;
            font-weight: 800;
            color: var(--primary);
            letter-spacing: -0.5px;
            flex-shrink: 0;
        }
        .logo-icon {
            width: 38px;
            height: 38px;
            background: linear-gradient(135deg, var(--secondary), var(--secondary-dark));
            border-radius: 10px;
            display: flex;
            align-items: center;
            justify-content: center;
            color: var(--primary);
            font-size: 18px;
            font-weight: 900;
        }
        .logo span { color: var(--secondary); }

        /* Search Bar (Nav Center) */
        .nav-search {
            flex: 1;
            max-width: 480px;
            position: relative;
            margin: 0 16px;
        }
        .nav-search input {
            width: 100%;
            height: 46px;
            padding: 0 20px 0 48px;
            background: var(--bg-alt);
            border: 2px solid transparent;
            border-radius: 30px;
            font-size: 15px;
            color: var(--text);
            transition: all var(--transition);
        }
        .nav-search input:focus {
            border-color: var(--secondary);
            background: var(--bg);
            box-shadow: 0 0 0 4px rgba(201,169,78,0.15);
        }
        .nav-search input::placeholder { color: var(--text-lighter); }
        .nav-search .search-icon {
            position: absolute;
            left: 18px;
            top: 50%;
            transform: translateY(-50%);
            color: var(--text-lighter);
            font-size: 16px;
            pointer-events: none;
        }
        .nav-search .search-shortcut {
            position: absolute;
            right: 14px;
            top: 50%;
            transform: translateY(-50%);
            font-size: 11px;
            color: var(--text-lighter);
            background: var(--border);
            padding: 2px 8px;
            border-radius: 4px;
            letter-spacing: 0.5px;
        }

        /* Nav Links */
        .nav-links {
            display: flex;
            align-items: center;
            gap: 8px;
            flex-shrink: 0;
        }
        .nav-links a {
            padding: 8px 18px;
            font-size: 15px;
            font-weight: 500;
            color: var(--text-light);
            border-radius: 8px;
            transition: all var(--transition);
            position: relative;
        }
        .nav-links a:hover {
            color: var(--primary);
            background: var(--bg-alt);
        }
        .nav-links a.active {
            color: var(--primary);
            background: rgba(201,169,78,0.12);
            font-weight: 600;
        }
        .nav-links a.active::after {
            content: '';
            position: absolute;
            bottom: 2px;
            left: 50%;
            transform: translateX(-50%);
            width: 20px;
            height: 3px;
            background: var(--secondary);
            border-radius: 2px;
        }

        /* Mobile Toggle */
        .mobile-toggle {
            display: none;
            width: 42px;
            height: 42px;
            align-items: center;
            justify-content: center;
            border-radius: 8px;
            color: var(--text);
            font-size: 20px;
            transition: background var(--transition);
        }
        .mobile-toggle:hover { background: var(--bg-alt); }

        /* ===== Hero Section ===== */
        .hero {
            position: relative;
            min-height: 100vh;
            display: flex;
            align-items: center;
            justify-content: center;
            padding: calc(var(--header-height) + 40px) 24px 80px;
            overflow: hidden;
            background: var(--primary-dark);
        }
        .hero-bg {
            position: absolute;
            inset: 0;
            background: url('/assets/images/backpic/back-1.png') center center / cover no-repeat;
            filter: brightness(0.45) saturate(1.1);
            transform: scale(1.05);
            transition: transform 8s ease;
        }
        .hero:hover .hero-bg { transform: scale(1.0); }
        .hero-overlay {
            position: absolute;
            inset: 0;
            background: linear-gradient(135deg, rgba(15,26,46,0.85) 0%, rgba(15,26,46,0.4) 50%, rgba(201,169,78,0.15) 100%);
        }
        .hero-content {
            position: relative;
            z-index: 2;
            text-align: center;
            max-width: 860px;
            width: 100%;
        }
        .hero-badge {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 8px 20px;
            background: rgba(201,169,78,0.15);
            border: 1px solid rgba(201,169,78,0.3);
            border-radius: 30px;
            color: var(--secondary-light);
            font-size: 14px;
            font-weight: 500;
            letter-spacing: 0.5px;
            margin-bottom: 28px;
            backdrop-filter: blur(4px);
        }
        .hero-badge i { font-size: 12px; }
        .hero-title {
            font-size: clamp(42px, 8vw, 80px);
            font-weight: 900;
            color: var(--text-white);
            line-height: 1.08;
            letter-spacing: -1.5px;
            margin-bottom: 20px;
        }
        .hero-title span {
            background: linear-gradient(135deg, var(--secondary-light), var(--secondary), #f5d87a);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }
        .hero-desc {
            font-size: clamp(16px, 2vw, 22px);
            color: rgba(255,255,255,0.75);
            font-weight: 400;
            max-width: 640px;
            margin: 0 auto 36px;
            line-height: 1.6;
        }
        .hero-search {
            max-width: 580px;
            margin: 0 auto 20px;
            position: relative;
        }
        .hero-search input {
            width: 100%;
            height: 60px;
            padding: 0 60px 0 28px;
            background: rgba(255,255,255,0.12);
            backdrop-filter: blur(12px);
            border: 1px solid rgba(255,255,255,0.18);
            border-radius: 40px;
            font-size: 17px;
            color: var(--text-white);
            transition: all var(--transition);
        }
        .hero-search input:focus {
            background: rgba(255,255,255,0.18);
            border-color: var(--secondary);
            box-shadow: 0 0 0 4px rgba(201,169,78,0.2);
        }
        .hero-search input::placeholder { color: rgba(255,255,255,0.5); }
        .hero-search button {
            position: absolute;
            right: 8px;
            top: 50%;
            transform: translateY(-50%);
            width: 46px;
            height: 46px;
            background: var(--secondary);
            border-radius: 50%;
            color: var(--primary);
            font-size: 18px;
            transition: all var(--transition);
            display: flex;
            align-items: center;
            justify-content: center;
        }
        .hero-search button:hover {
            background: var(--secondary-light);
            transform: translateY(-50%) scale(1.05);
        }
        .hero-tags {
            display: flex;
            flex-wrap: wrap;
            gap: 10px;
            justify-content: center;
            margin-top: 24px;
        }
        .hero-tags a {
            padding: 6px 16px;
            background: rgba(255,255,255,0.08);
            border: 1px solid rgba(255,255,255,0.12);
            border-radius: 20px;
            color: rgba(255,255,255,0.7);
            font-size: 13px;
            transition: all var(--transition);
        }
        .hero-tags a:hover {
            background: rgba(201,169,78,0.2);
            border-color: var(--secondary);
            color: var(--secondary-light);
        }
        .hero-stats {
            display: flex;
            gap: 40px;
            justify-content: center;
            margin-top: 48px;
            flex-wrap: wrap;
        }
        .hero-stat {
            text-align: center;
            color: var(--text-white);
        }
        .hero-stat-num {
            font-size: 32px;
            font-weight: 800;
            color: var(--secondary-light);
            letter-spacing: -0.5px;
        }
        .hero-stat-label {
            font-size: 14px;
            color: rgba(255,255,255,0.55);
            margin-top: 4px;
        }

        /* ===== Section Common ===== */
        .section {
            padding: 80px 24px;
        }
        .section-alt {
            background: var(--bg-alt);
        }
        .section-dark {
            background: var(--bg-dark);
            color: var(--text-white);
        }
        .section-header {
            text-align: center;
            margin-bottom: 52px;
        }
        .section-header h2 {
            font-size: clamp(28px, 4vw, 42px);
            font-weight: 800;
            letter-spacing: -0.5px;
            margin-bottom: 12px;
        }
        .section-header p {
            font-size: 17px;
            color: var(--text-light);
            max-width: 560px;
            margin: 0 auto;
            line-height: 1.6;
        }
        .section-header.light h2 { color: var(--text-white); }
        .section-header.light p { color: rgba(255,255,255,0.65); }

        .section-header .section-tag {
            display: inline-block;
            padding: 4px 16px;
            background: rgba(201,169,78,0.12);
            border-radius: 20px;
            font-size: 13px;
            font-weight: 600;
            color: var(--secondary-dark);
            letter-spacing: 0.5px;
            margin-bottom: 12px;
        }
        .section-header.light .section-tag {
            background: rgba(201,169,78,0.18);
            color: var(--secondary-light);
        }

        /* ===== Features / Highlights ===== */
        .features-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 28px;
            max-width: var(--max-width);
            margin: 0 auto;
        }
        .feature-card {
            background: var(--bg);
            border-radius: var(--radius-lg);
            padding: 36px 28px 32px;
            box-shadow: var(--shadow-sm);
            border: 1px solid var(--border-light);
            transition: all var(--transition);
            text-align: center;
        }
        .feature-card:hover {
            box-shadow: var(--shadow-lg);
            transform: translateY(-6px);
            border-color: rgba(201,169,78,0.2);
        }
        .feature-icon {
            width: 64px;
            height: 64px;
            margin: 0 auto 20px;
            background: linear-gradient(135deg, rgba(201,169,78,0.12), rgba(201,169,78,0.05));
            border-radius: 16px;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 28px;
            color: var(--secondary);
            transition: all var(--transition);
        }
        .feature-card:hover .feature-icon {
            background: linear-gradient(135deg, var(--secondary), var(--secondary-dark));
            color: var(--text-white);
            transform: scale(1.05);
        }
        .feature-card h3 {
            font-size: 20px;
            font-weight: 700;
            margin-bottom: 10px;
        }
        .feature-card p {
            font-size: 15px;
            color: var(--text-light);
            line-height: 1.7;
        }

        /* ===== Category Card ===== */
        .category-section {
            max-width: var(--max-width);
            margin: 0 auto;
        }
        .category-card {
            position: relative;
            border-radius: var(--radius-lg);
            overflow: hidden;
            background: var(--primary);
            min-height: 320px;
            display: flex;
            align-items: center;
        }
        .category-card-bg {
            position: absolute;
            inset: 0;
            background: url('/assets/images/coverpic/cover-1.png') center center / cover no-repeat;
            filter: brightness(0.35);
            transition: transform 0.6s ease, filter 0.6s ease;
        }
        .category-card:hover .category-card-bg {
            transform: scale(1.06);
            filter: brightness(0.25);
        }
        .category-card-overlay {
            position: absolute;
            inset: 0;
            background: linear-gradient(135deg, rgba(15,26,46,0.8) 0%, rgba(15,26,46,0.2) 100%);
        }
        .category-card-content {
            position: relative;
            z-index: 2;
            padding: 48px 40px;
            max-width: 520px;
        }
        .category-card-content .cat-badge {
            display: inline-block;
            padding: 4px 14px;
            background: rgba(201,169,78,0.2);
            border-radius: 20px;
            font-size: 12px;
            font-weight: 600;
            color: var(--secondary-light);
            letter-spacing: 0.5px;
            margin-bottom: 14px;
        }
        .category-card-content h2 {
            font-size: 32px;
            font-weight: 800;
            color: var(--text-white);
            margin-bottom: 12px;
        }
        .category-card-content p {
            font-size: 16px;
            color: rgba(255,255,255,0.7);
            line-height: 1.7;
            margin-bottom: 24px;
        }
        .category-card-content .btn {
            display: inline-flex;
            align-items: center;
            gap: 10px;
            padding: 12px 32px;
            background: var(--secondary);
            color: var(--primary);
            font-weight: 700;
            font-size: 15px;
            border-radius: 30px;
            transition: all var(--transition);
        }
        .category-card-content .btn:hover {
            background: var(--secondary-light);
            transform: translateY(-2px);
            box-shadow: 0 8px 24px rgba(201,169,78,0.3);
        }

        /* ===== CMS Posts Grid ===== */
        .posts-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 28px;
            max-width: var(--max-width);
            margin: 0 auto;
        }
        .post-card {
            background: var(--bg);
            border-radius: var(--radius);
            overflow: hidden;
            box-shadow: var(--shadow-sm);
            border: 1px solid var(--border-light);
            transition: all var(--transition);
        }
        .post-card:hover {
            box-shadow: var(--shadow-lg);
            transform: translateY(-4px);
            border-color: rgba(201,169,78,0.15);
        }
        .post-card-img {
            position: relative;
            width: 100%;
            height: 200px;
            overflow: hidden;
            background: var(--bg-alt);
        }
        .post-card-img img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform 0.6s ease;
        }
        .post-card:hover .post-card-img img { transform: scale(1.06); }
        .post-card-img .post-cat {
            position: absolute;
            top: 14px;
            left: 14px;
            padding: 4px 12px;
            background: rgba(15,26,46,0.75);
            backdrop-filter: blur(4px);
            border-radius: 6px;
            font-size: 12px;
            font-weight: 500;
            color: var(--text-white);
        }
        .post-card-body {
            padding: 20px 22px 24px;
        }
        .post-card-body .post-date {
            font-size: 13px;
            color: var(--text-lighter);
            margin-bottom: 8px;
            display: flex;
            align-items: center;
            gap: 6px;
        }
        .post-card-body h3 {
            font-size: 18px;
            font-weight: 700;
            margin-bottom: 8px;
            line-height: 1.35;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }
        .post-card-body h3 a { color: var(--text); }
        .post-card-body h3 a:hover { color: var(--secondary-dark); }
        .post-card-body p {
            font-size: 14px;
            color: var(--text-light);
            line-height: 1.7;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }
        .post-card-body .post-meta {
            display: flex;
            align-items: center;
            gap: 14px;
            margin-top: 14px;
            padding-top: 14px;
            border-top: 1px solid var(--border-light);
            font-size: 13px;
            color: var(--text-lighter);
        }
        .post-card-body .post-meta i { margin-right: 4px; }

        .posts-empty {
            grid-column: 1 / -1;
            text-align: center;
            padding: 48px 24px;
            background: var(--bg-alt);
            border-radius: var(--radius);
            color: var(--text-light);
            font-size: 16px;
        }

        /* ===== How It Works / Steps ===== */
        .steps-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 28px;
            max-width: var(--max-width);
            margin: 0 auto;
        }
        .step-item {
            text-align: center;
            position: relative;
        }
        .step-number {
            width: 56px;
            height: 56px;
            margin: 0 auto 20px;
            background: linear-gradient(135deg, var(--secondary), var(--secondary-dark));
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 22px;
            font-weight: 800;
            color: var(--primary);
            position: relative;
            z-index: 2;
        }
        .step-item::after {
            content: '';
            position: absolute;
            top: 28px;
            left: 60%;
            width: calc(100% - 60px);
            height: 2px;
            background: linear-gradient(90deg, var(--secondary), rgba(201,169,78,0.2));
            z-index: 0;
        }
        .step-item:last-child::after { display: none; }
        .step-item h4 {
            font-size: 18px;
            font-weight: 700;
            margin-bottom: 8px;
        }
        .step-item p {
            font-size: 14px;
            color: var(--text-light);
            line-height: 1.6;
        }

        /* ===== Stats / Data Block ===== */
        .stats-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 28px;
            max-width: var(--max-width);
            margin: 0 auto;
        }
        .stat-item {
            text-align: center;
            padding: 32px 16px;
            background: rgba(255,255,255,0.04);
            border: 1px solid rgba(255,255,255,0.08);
            border-radius: var(--radius);
            transition: all var(--transition);
        }
        .stat-item:hover {
            background: rgba(255,255,255,0.08);
            border-color: rgba(201,169,78,0.2);
        }
        .stat-item .num {
            font-size: 42px;
            font-weight: 900;
            color: var(--secondary-light);
            letter-spacing: -1px;
            line-height: 1;
        }
        .stat-item .label {
            font-size: 15px;
            color: rgba(255,255,255,0.6);
            margin-top: 10px;
        }

        /* ===== Featured / Picks ===== */
        .featured-grid {
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: 28px;
            max-width: var(--max-width);
            margin: 0 auto;
        }
        .featured-card {
            position: relative;
            border-radius: var(--radius-lg);
            overflow: hidden;
            min-height: 280px;
            display: flex;
            align-items: flex-end;
        }
        .featured-card-bg {
            position: absolute;
            inset: 0;
            background-size: cover;
            background-position: center;
            filter: brightness(0.5);
            transition: transform 0.6s ease, filter 0.6s ease;
        }
        .featured-card:hover .featured-card-bg {
            transform: scale(1.06);
            filter: brightness(0.35);
        }
        .featured-card-overlay {
            position: absolute;
            inset: 0;
            background: linear-gradient(0deg, rgba(15,26,46,0.85) 0%, transparent 60%);
        }
        .featured-card-content {
            position: relative;
            z-index: 2;
            padding: 32px 28px;
            width: 100%;
        }
        .featured-card-content .tag {
            display: inline-block;
            padding: 3px 12px;
            background: rgba(201,169,78,0.25);
            border-radius: 6px;
            font-size: 11px;
            font-weight: 600;
            color: var(--secondary-light);
            letter-spacing: 0.5px;
            margin-bottom: 10px;
        }
        .featured-card-content h3 {
            font-size: 22px;
            font-weight: 700;
            color: var(--text-white);
            margin-bottom: 6px;
        }
        .featured-card-content p {
            font-size: 14px;
            color: rgba(255,255,255,0.65);
            line-height: 1.6;
        }

        /* ===== FAQ ===== */
        .faq-list {
            max-width: 720px;
            margin: 0 auto;
            display: flex;
            flex-direction: column;
            gap: 12px;
        }
        .faq-item {
            background: var(--bg);
            border: 1px solid var(--border-light);
            border-radius: var(--radius);
            overflow: hidden;
            transition: all var(--transition);
        }
        .faq-item:hover {
            border-color: rgba(201,169,78,0.2);
            box-shadow: var(--shadow-sm);
        }
        .faq-question {
            width: 100%;
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding: 20px 24px;
            font-size: 16px;
            font-weight: 600;
            color: var(--text);
            text-align: left;
            background: none;
            gap: 16px;
            transition: background var(--transition);
        }
        .faq-question:hover { background: var(--bg-alt); }
        .faq-question i {
            font-size: 14px;
            color: var(--text-lighter);
            transition: transform var(--transition);
            flex-shrink: 0;
        }
        .faq-item.active .faq-question i { transform: rotate(180deg); color: var(--secondary); }
        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.4s ease, padding 0.4s ease;
            padding: 0 24px;
            color: var(--text-light);
            font-size: 15px;
            line-height: 1.7;
        }
        .faq-item.active .faq-answer {
            max-height: 300px;
            padding: 0 24px 20px;
        }

        /* ===== CTA ===== */
        .cta-section {
            background: linear-gradient(135deg, var(--primary), var(--primary-light));
            padding: 80px 24px;
            text-align: center;
        }
        .cta-inner {
            max-width: 640px;
            margin: 0 auto;
        }
        .cta-inner h2 {
            font-size: clamp(28px, 4vw, 40px);
            font-weight: 800;
            color: var(--text-white);
            margin-bottom: 14px;
        }
        .cta-inner p {
            font-size: 17px;
            color: rgba(255,255,255,0.7);
            margin-bottom: 32px;
            line-height: 1.6;
        }
        .cta-inner .btn-group {
            display: flex;
            gap: 16px;
            justify-content: center;
            flex-wrap: wrap;
        }
        .btn-primary {
            display: inline-flex;
            align-items: center;
            gap: 10px;
            padding: 14px 36px;
            background: var(--secondary);
            color: var(--primary);
            font-weight: 700;
            font-size: 16px;
            border-radius: 30px;
            transition: all var(--transition);
        }
        .btn-primary:hover {
            background: var(--secondary-light);
            transform: translateY(-2px);
            box-shadow: 0 8px 28px rgba(201,169,78,0.35);
        }
        .btn-outline {
            display: inline-flex;
            align-items: center;
            gap: 10px;
            padding: 14px 36px;
            background: transparent;
            color: var(--text-white);
            font-weight: 600;
            font-size: 16px;
            border-radius: 30px;
            border: 2px solid rgba(255,255,255,0.25);
            transition: all var(--transition);
        }
        .btn-outline:hover {
            border-color: var(--secondary);
            color: var(--secondary-light);
            background: rgba(201,169,78,0.08);
        }

        /* ===== Footer ===== */
        .footer {
            background: var(--primary-dark);
            color: rgba(255,255,255,0.65);
            padding: 60px 24px 28px;
        }
        .footer-inner {
            max-width: var(--max-width);
            margin: 0 auto;
            display: grid;
            grid-template-columns: 2fr 1fr 1fr 1fr;
            gap: 40px;
        }
        .footer-brand .logo {
            color: var(--text-white);
            margin-bottom: 14px;
        }
        .footer-brand p {
            font-size: 14px;
            line-height: 1.7;
            color: rgba(255,255,255,0.5);
            max-width: 300px;
        }
        .footer-col h4 {
            font-size: 16px;
            font-weight: 700;
            color: var(--text-white);
            margin-bottom: 16px;
        }
        .footer-col a {
            display: block;
            padding: 6px 0;
            font-size: 14px;
            color: rgba(255,255,255,0.5);
            transition: all var(--transition);
        }
        .footer-col a:hover {
            color: var(--secondary-light);
            padding-left: 4px;
        }
        .footer-bottom {
            max-width: var(--max-width);
            margin: 40px auto 0;
            padding-top: 20px;
            border-top: 1px solid rgba(255,255,255,0.08);
            display: flex;
            justify-content: space-between;
            align-items: center;
            flex-wrap: wrap;
            gap: 12px;
            font-size: 13px;
            color: rgba(255,255,255,0.35);
        }
        .footer-bottom a { color: rgba(255,255,255,0.35); }
        .footer-bottom a:hover { color: var(--secondary-light); }

        /* ===== Responsive ===== */
        @media (max-width: 1024px) {
            .features-grid { grid-template-columns: repeat(2, 1fr); }
            .posts-grid { grid-template-columns: repeat(2, 1fr); }
            .steps-grid { grid-template-columns: repeat(2, 1fr); }
            .steps-grid .step-item:nth-child(2)::after { display: none; }
            .stats-grid { grid-template-columns: repeat(2, 1fr); }
            .featured-grid { grid-template-columns: 1fr; }
            .footer-inner { grid-template-columns: 1fr 1fr; }
        }

        @media (max-width: 820px) {
            .nav-search { display: none; }
            .nav-links { gap: 4px; }
            .nav-links a { padding: 6px 12px; font-size: 14px; }
            .header-inner { gap: 12px; }
            .hero { min-height: 80vh; padding-top: calc(var(--header-height) + 24px); }
            .hero-title { font-size: clamp(32px, 6vw, 48px); }
            .hero-stats { gap: 24px; }
            .hero-stat-num { font-size: 26px; }
        }

        @media (max-width: 640px) {
            :root { --header-height: 64px; }
            .header-inner { padding: 0 16px; }
            .logo { font-size: 20px; }
            .logo-icon { width: 32px; height: 32px; font-size: 14px; }
            .nav-links a { padding: 4px 10px; font-size: 13px; }
            .nav-links a.active::after { width: 14px; height: 2px; bottom: 0; }
            .mobile-toggle { display: flex; }
            .nav-links { display: none; }
            .nav-links.mobile-open {
                display: flex;
                flex-direction: column;
                position: absolute;
                top: var(--header-height);
                left: 0;
                width: 100%;
                background: rgba(255,255,255,0.98);
                backdrop-filter: blur(20px);
                padding: 16px 24px;
                gap: 6px;
                box-shadow: var(--shadow-lg);
                border-bottom: 1px solid var(--border-light);
            }
            .nav-links.mobile-open a { padding: 12px 16px; font-size: 15px; border-radius: 8px; }
            .nav-links.mobile-open a.active { background: rgba(201,169,78,0.1); }
            .nav-links.mobile-open a.active::after { display: none; }

            .section { padding: 48px 16px; }
            .section-header { margin-bottom: 32px; }
            .section-header h2 { font-size: 26px; }

            .features-grid { grid-template-columns: 1fr; gap: 16px; }
            .feature-card { padding: 24px 20px; }

            .posts-grid { grid-template-columns: 1fr; gap: 16px; }
            .post-card-img { height: 180px; }

            .steps-grid { grid-template-columns: 1fr; gap: 24px; }
            .step-item::after { display: none; }

            .stats-grid { grid-template-columns: repeat(2, 1fr); gap: 12px; }
            .stat-item { padding: 20px 12px; }
            .stat-item .num { font-size: 32px; }

            .featured-grid { gap: 16px; }
            .featured-card { min-height: 220px; }
            .featured-card-content { padding: 24px 20px; }
            .featured-card-content h3 { font-size: 18px; }

            .faq-question { padding: 16px 18px; font-size: 15px; }
            .faq-answer { font-size: 14px; }

            .cta-section { padding: 48px 16px; }
            .btn-primary, .btn-outline { padding: 12px 28px; font-size: 15px; }

            .footer { padding: 40px 16px 20px; }
            .footer-inner { grid-template-columns: 1fr; gap: 28px; }
            .footer-bottom { flex-direction: column; text-align: center; }

            .hero { min-height: 70vh; padding: calc(var(--header-height) + 20px) 16px 40px; }
            .hero-title { font-size: 32px; }
            .hero-desc { font-size: 15px; margin-bottom: 24px; }
            .hero-search input { height: 50px; font-size: 15px; padding: 0 52px 0 20px; }
            .hero-search button { width: 40px; height: 40px; font-size: 15px; right: 6px; }
            .hero-stats { gap: 16px; margin-top: 28px; }
            .hero-stat-num { font-size: 22px; }
            .hero-stat-label { font-size: 12px; }
            .hero-tags { gap: 8px; }
            .hero-tags a { font-size: 12px; padding: 4px 12px; }

            .category-card-content { padding: 28px 24px; }
            .category-card-content h2 { font-size: 24px; }
        }

        @media (max-width: 420px) {
            .stats-grid { grid-template-columns: 1fr 1fr; gap: 8px; }
            .hero-title { font-size: 26px; }
            .hero-desc { font-size: 14px; }
            .post-card-body h3 { font-size: 16px; }
        }

        /* ===== Accessibility ===== */
        a:focus-visible, button:focus-visible, input:focus-visible {
            outline: 3px solid var(--secondary);
            outline-offset: 2px;
        }
        @media (prefers-reduced-motion: reduce) {
            *, *::before, *::after { transition-duration: 0.01ms !important; animation-duration: 0.01ms !important; }
        }

        /* ===== Scrollbar ===== */
        ::-webkit-scrollbar { width: 8px; }
        ::-webkit-scrollbar-track { background: var(--bg-alt); }
        ::-webkit-scrollbar-thumb { background: var(--text-lighter); border-radius: 4px; }
        ::-webkit-scrollbar-thumb:hover { background: var(--text-light); }

/* roulang page: category1 */
/* ===== Design Variables ===== */
        :root {
            --primary: #1e4a7a;
            --primary-light: #2d6a9f;
            --primary-dark: #0f2d4a;
            --secondary: #e8a838;
            --secondary-light: #f0c060;
            --accent: #d4772a;
            --bg-body: #f6f8fc;
            --bg-card: #ffffff;
            --bg-dark: #0f1a2e;
            --bg-section-alt: #eef2f7;
            --text-primary: #1a2332;
            --text-secondary: #4a5a72;
            --text-light: #7a8aa2;
            --text-white: #f0f4fa;
            --border: #dce2ec;
            --border-light: #e8edf4;
            --radius-sm: 8px;
            --radius-md: 14px;
            --radius-lg: 24px;
            --radius-xl: 32px;
            --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.06);
            --shadow-md: 0 6px 24px rgba(0, 0, 0, 0.09);
            --shadow-lg: 0 16px 48px rgba(0, 0, 0, 0.14);
            --transition: 0.28s cubic-bezier(0.22, 0.61, 0.36, 1);
            --font-sans: 'Segoe UI', system-ui, -apple-system, Roboto, 'Helvetica Neue', sans-serif;
            --container-max: 1200px;
            --header-h: 72px;
        }

        /* ===== Reset / Base ===== */
        *,
        *::before,
        *::after {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
        }
        html {
            scroll-behavior: smooth;
            -webkit-text-size-adjust: 100%;
        }
        body {
            font-family: var(--font-sans);
            font-size: 16px;
            line-height: 1.7;
            color: var(--text-primary);
            background: var(--bg-body);
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
            border-radius: var(--radius-sm);
        }
        a {
            color: inherit;
            text-decoration: none;
            transition: var(--transition);
        }
        button,
        input,
        textarea {
            font-family: inherit;
            font-size: 1rem;
            border: none;
            outline: none;
            transition: var(--transition);
        }
        button {
            cursor: pointer;
        }
        ul,
        ol {
            list-style: none;
        }
        h1,
        h2,
        h3,
        h4,
        h5,
        h6 {
            line-height: 1.25;
            font-weight: 700;
            color: var(--text-primary);
        }
        h1 {
            font-size: clamp(2.2rem, 5vw, 3.8rem);
        }
        h2 {
            font-size: clamp(1.6rem, 3.2vw, 2.4rem);
        }
        h3 {
            font-size: clamp(1.2rem, 2vw, 1.6rem);
        }
        h4 {
            font-size: 1.1rem;
        }
        p {
            color: var(--text-secondary);
            margin-bottom: 0.8rem;
        }
        .container {
            max-width: var(--container-max);
            margin: 0 auto;
            padding: 0 24px;
        }
        .section {
            padding: 80px 0;
        }
        .section-alt {
            background: var(--bg-section-alt);
        }
        .section-title {
            text-align: center;
            margin-bottom: 48px;
        }
        .section-title h2 {
            margin-bottom: 12px;
            position: relative;
            display: inline-block;
        }
        .section-title h2::after {
            content: '';
            display: block;
            width: 56px;
            height: 4px;
            background: var(--secondary);
            border-radius: 4px;
            margin: 12px auto 0;
        }
        .section-title p {
            max-width: 620px;
            margin: 0 auto;
            font-size: 1.05rem;
            color: var(--text-light);
        }
        .sr-only {
            position: absolute;
            width: 1px;
            height: 1px;
            padding: 0;
            margin: -1px;
            overflow: hidden;
            clip: rect(0, 0, 0, 0);
            border: 0;
        }

        /* ===== Header / Nav ===== */
        .header {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            z-index: 1000;
            height: var(--header-h);
            background: rgba(15, 26, 46, 0.88);
            backdrop-filter: blur(18px) saturate(1.6);
            -webkit-backdrop-filter: blur(18px) saturate(1.6);
            border-bottom: 1px solid rgba(255, 255, 255, 0.08);
            transition: var(--transition);
        }
        .header .container {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 100%;
            gap: 16px;
        }
        .logo {
            display: flex;
            align-items: center;
            gap: 8px;
            font-size: 1.5rem;
            font-weight: 800;
            color: var(--text-white);
            letter-spacing: -0.02em;
            flex-shrink: 0;
        }
        .logo .logo-icon {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 38px;
            height: 38px;
            background: var(--secondary);
            color: var(--primary-dark);
            border-radius: var(--radius-sm);
            font-weight: 900;
            font-size: 1.2rem;
        }
        .logo span {
            color: var(--secondary);
        }
        .nav-wrapper {
            display: flex;
            align-items: center;
            gap: 24px;
            flex: 1;
            justify-content: flex-end;
        }
        .nav-search {
            position: relative;
            flex: 0 1 320px;
            min-width: 160px;
        }
        .nav-search input {
            width: 100%;
            padding: 10px 16px 10px 42px;
            border-radius: 40px;
            background: rgba(255, 255, 255, 0.12);
            color: var(--text-white);
            border: 1px solid rgba(255, 255, 255, 0.15);
            font-size: 0.9rem;
            transition: var(--transition);
        }
        .nav-search input::placeholder {
            color: rgba(255, 255, 255, 0.5);
        }
        .nav-search input:focus {
            background: rgba(255, 255, 255, 0.20);
            border-color: var(--secondary);
            box-shadow: 0 0 0 3px rgba(232, 168, 56, 0.25);
        }
        .nav-search .fa-search {
            position: absolute;
            left: 16px;
            top: 50%;
            transform: translateY(-50%);
            color: rgba(255, 255, 255, 0.5);
            font-size: 0.9rem;
            pointer-events: none;
        }
        .nav-links {
            display: flex;
            align-items: center;
            gap: 8px;
        }
        .nav-links a {
            padding: 8px 18px;
            border-radius: 40px;
            font-size: 0.92rem;
            font-weight: 500;
            color: rgba(255, 255, 255, 0.75);
            transition: var(--transition);
            white-space: nowrap;
        }
        .nav-links a:hover,
        .nav-links a:focus-visible {
            color: #fff;
            background: rgba(255, 255, 255, 0.10);
        }
        .nav-links a.active {
            color: #fff;
            background: var(--primary-light);
            box-shadow: 0 2px 12px rgba(45, 106, 159, 0.4);
        }
        .nav-toggle {
            display: none;
            background: none;
            color: var(--text-white);
            font-size: 1.5rem;
            padding: 6px 10px;
            border-radius: var(--radius-sm);
            border: 1px solid rgba(255, 255, 255, 0.15);
        }
        .nav-toggle:hover {
            background: rgba(255, 255, 255, 0.08);
        }

        /* ===== Mobile Nav ===== */
        .mobile-menu {
            display: none;
            position: fixed;
            top: var(--header-h);
            left: 0;
            right: 0;
            background: rgba(15, 26, 46, 0.97);
            backdrop-filter: blur(20px);
            -webkit-backdrop-filter: blur(20px);
            padding: 20px 24px 28px;
            flex-direction: column;
            gap: 16px;
            border-bottom: 1px solid rgba(255, 255, 255, 0.08);
            z-index: 999;
            transform: translateY(-12px);
            opacity: 0;
            pointer-events: none;
            transition: var(--transition);
        }
        .mobile-menu.open {
            transform: translateY(0);
            opacity: 1;
            pointer-events: auto;
        }
        .mobile-menu .nav-links {
            flex-direction: column;
            gap: 6px;
            width: 100%;
        }
        .mobile-menu .nav-links a {
            display: block;
            width: 100%;
            text-align: center;
            padding: 12px 18px;
            font-size: 1.05rem;
        }
        .mobile-menu .nav-search {
            width: 100%;
            flex: unset;
        }

        /* ===== Hero ===== */
        .hero-cat {
            position: relative;
            padding: 140px 0 80px;
            min-height: 520px;
            display: flex;
            align-items: center;
            background: var(--bg-dark);
            overflow: hidden;
        }
        .hero-cat-bg {
            position: absolute;
            inset: 0;
            background: url('/assets/images/backpic/back-1.png') center center / cover no-repeat;
            opacity: 0.50;
            transform: scale(1.04);
            transition: transform 12s ease;
        }
        .hero-cat:hover .hero-cat-bg {
            transform: scale(1.00);
        }
        .hero-cat-overlay {
            position: absolute;
            inset: 0;
            background: linear-gradient(135deg, rgba(15, 26, 46, 0.88) 0%, rgba(15, 26, 46, 0.40) 60%, rgba(15, 26, 46, 0.70) 100%);
        }
        .hero-cat .container {
            position: relative;
            z-index: 2;
            text-align: center;
            color: var(--text-white);
        }
        .hero-cat h1 {
            color: #fff;
            font-weight: 800;
            letter-spacing: -0.02em;
            margin-bottom: 16px;
            text-shadow: 0 4px 20px rgba(0, 0, 0, 0.3);
        }
        .hero-cat h1 .highlight {
            color: var(--secondary);
        }
        .hero-cat p {
            font-size: 1.15rem;
            color: rgba(255, 255, 255, 0.8);
            max-width: 640px;
            margin: 0 auto 32px;
        }
        .hero-cat .hero-search {
            display: flex;
            max-width: 560px;
            margin: 0 auto;
            background: rgba(255, 255, 255, 0.12);
            border-radius: 50px;
            border: 1px solid rgba(255, 255, 255, 0.18);
            overflow: hidden;
            backdrop-filter: blur(6px);
        }
        .hero-cat .hero-search input {
            flex: 1;
            padding: 14px 22px;
            background: transparent;
            color: #fff;
            font-size: 1rem;
            min-width: 0;
        }
        .hero-cat .hero-search input::placeholder {
            color: rgba(255, 255, 255, 0.5);
        }
        .hero-cat .hero-search button {
            padding: 14px 28px;
            background: var(--secondary);
            color: var(--primary-dark);
            font-weight: 700;
            font-size: 0.95rem;
            border-radius: 0 50px 50px 0;
            display: flex;
            align-items: center;
            gap: 8px;
            transition: var(--transition);
        }
        .hero-cat .hero-search button:hover {
            background: var(--secondary-light);
            transform: scale(1.02);
        }
        .hero-cat .hero-tags {
            display: flex;
            flex-wrap: wrap;
            justify-content: center;
            gap: 12px;
            margin-top: 28px;
        }
        .hero-cat .hero-tags a {
            padding: 6px 18px;
            border-radius: 40px;
            background: rgba(255, 255, 255, 0.09);
            color: rgba(255, 255, 255, 0.8);
            font-size: 0.85rem;
            border: 1px solid rgba(255, 255, 255, 0.10);
            transition: var(--transition);
        }
        .hero-cat .hero-tags a:hover {
            background: rgba(255, 255, 255, 0.18);
            color: #fff;
            border-color: var(--secondary);
        }

        /* ===== Category Cards ===== */
        .cat-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
            gap: 28px;
        }
        .cat-card {
            position: relative;
            border-radius: var(--radius-md);
            overflow: hidden;
            background: var(--bg-card);
            box-shadow: var(--shadow-sm);
            transition: var(--transition);
            cursor: pointer;
            border: 1px solid var(--border-light);
        }
        .cat-card:hover {
            transform: translateY(-6px);
            box-shadow: var(--shadow-lg);
        }
        .cat-card .cat-img {
            width: 100%;
            height: 200px;
            object-fit: cover;
            display: block;
            transition: var(--transition);
        }
        .cat-card:hover .cat-img {
            transform: scale(1.05);
        }
        .cat-card .cat-body {
            padding: 20px 20px 24px;
        }
        .cat-card .cat-body h3 {
            font-size: 1.2rem;
            margin-bottom: 6px;
        }
        .cat-card .cat-body p {
            font-size: 0.92rem;
            color: var(--text-light);
            margin-bottom: 0;
        }
        .cat-card .cat-badge {
            position: absolute;
            top: 14px;
            left: 14px;
            padding: 4px 14px;
            background: rgba(232, 168, 56, 0.92);
            color: #fff;
            font-size: 0.78rem;
            font-weight: 600;
            border-radius: 40px;
            backdrop-filter: blur(4px);
        }

        /* ===== Guide Cards ===== */
        .guide-grid {
            display: grid;
            grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
            gap: 28px;
        }
        .guide-card {
            background: var(--bg-card);
            border-radius: var(--radius-md);
            overflow: hidden;
            box-shadow: var(--shadow-sm);
            border: 1px solid var(--border-light);
            transition: var(--transition);
        }
        .guide-card:hover {
            transform: translateY(-5px);
            box-shadow: var(--shadow-md);
        }
        .guide-card .guide-img {
            width: 100%;
            height: 200px;
            object-fit: cover;
            display: block;
            transition: var(--transition);
        }
        .guide-card:hover .guide-img {
            transform: scale(1.03);
        }
        .guide-card .guide-body {
            padding: 20px 22px 24px;
        }
        .guide-card .guide-body .guide-tags {
            display: flex;
            flex-wrap: wrap;
            gap: 8px;
            margin-bottom: 10px;
        }
        .guide-card .guide-body .guide-tags span {
            padding: 3px 12px;
            background: var(--bg-section-alt);
            border-radius: 40px;
            font-size: 0.75rem;
            color: var(--text-secondary);
            font-weight: 500;
        }
        .guide-card .guide-body h3 {
            font-size: 1.1rem;
            margin-bottom: 8px;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }
        .guide-card .guide-body p {
            font-size: 0.9rem;
            color: var(--text-light);
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
            margin-bottom: 12px;
        }
        .guide-card .guide-body .guide-meta {
            display: flex;
            align-items: center;
            justify-content: space-between;
            font-size: 0.82rem;
            color: var(--text-light);
            border-top: 1px solid var(--border-light);
            padding-top: 12px;
        }
        .guide-card .guide-body .guide-meta i {
            margin-right: 4px;
        }
        .guide-card .guide-body .guide-meta .views {
            display: flex;
            align-items: center;
            gap: 4px;
        }

        /* ===== Stats ===== */
        .stats-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
            gap: 32px;
            text-align: center;
        }
        .stat-item {
            background: var(--bg-card);
            border-radius: var(--radius-md);
            padding: 32px 20px;
            box-shadow: var(--shadow-sm);
            border: 1px solid var(--border-light);
            transition: var(--transition);
        }
        .stat-item:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow-md);
        }
        .stat-item .stat-number {
            font-size: 2.8rem;
            font-weight: 800;
            color: var(--primary);
            line-height: 1.1;
            margin-bottom: 6px;
        }
        .stat-item .stat-number .plus {
            color: var(--secondary);
            font-size: 2rem;
        }
        .stat-item .stat-label {
            font-size: 0.95rem;
            color: var(--text-light);
            font-weight: 500;
        }

        /* ===== Latest List ===== */
        .latest-list {
            display: flex;
            flex-direction: column;
            gap: 16px;
            max-width: 840px;
            margin: 0 auto;
        }
        .latest-item {
            display: flex;
            align-items: center;
            gap: 20px;
            background: var(--bg-card);
            padding: 18px 22px;
            border-radius: var(--radius-md);
            box-shadow: var(--shadow-sm);
            border: 1px solid var(--border-light);
            transition: var(--transition);
        }
        .latest-item:hover {
            transform: translateX(6px);
            box-shadow: var(--shadow-md);
            border-color: var(--secondary);
        }
        .latest-item .latest-num {
            font-size: 1.4rem;
            font-weight: 800;
            color: var(--border);
            min-width: 36px;
            text-align: center;
            font-feature-settings: "tnum";
        }
        .latest-item .latest-content {
            flex: 1;
            min-width: 0;
        }
        .latest-item .latest-content h4 {
            font-size: 1rem;
            margin-bottom: 2px;
            white-space: nowrap;
            overflow: hidden;
            text-overflow: ellipsis;
        }
        .latest-item .latest-content p {
            font-size: 0.85rem;
            color: var(--text-light);
            white-space: nowrap;
            overflow: hidden;
            text-overflow: ellipsis;
            margin-bottom: 0;
        }
        .latest-item .latest-tag {
            padding: 4px 14px;
            background: var(--bg-section-alt);
            border-radius: 40px;
            font-size: 0.75rem;
            color: var(--text-secondary);
            font-weight: 500;
            flex-shrink: 0;
        }
        .latest-item .latest-more {
            color: var(--primary-light);
            font-weight: 600;
            font-size: 0.85rem;
            flex-shrink: 0;
            display: flex;
            align-items: center;
            gap: 4px;
        }
        .latest-item .latest-more:hover {
            color: var(--secondary);
        }

        /* ===== FAQ ===== */
        .faq-list {
            max-width: 780px;
            margin: 0 auto;
            display: flex;
            flex-direction: column;
            gap: 12px;
        }
        .faq-item {
            background: var(--bg-card);
            border-radius: var(--radius-md);
            border: 1px solid var(--border-light);
            overflow: hidden;
            transition: var(--transition);
        }
        .faq-item:hover {
            border-color: var(--primary-light);
        }
        .faq-item .faq-question {
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding: 18px 24px;
            font-weight: 600;
            font-size: 1.02rem;
            cursor: pointer;
            background: none;
            width: 100%;
            text-align: left;
            color: var(--text-primary);
            gap: 16px;
            transition: var(--transition);
        }
        .faq-item .faq-question:hover {
            background: rgba(30, 74, 122, 0.04);
        }
        .faq-item .faq-question i {
            font-size: 1.1rem;
            color: var(--primary-light);
            transition: var(--transition);
            flex-shrink: 0;
        }
        .faq-item.open .faq-question i {
            transform: rotate(180deg);
            color: var(--secondary);
        }
        .faq-item .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.4s ease, padding 0.3s ease;
            padding: 0 24px;
            color: var(--text-secondary);
            font-size: 0.95rem;
            line-height: 1.7;
        }
        .faq-item.open .faq-answer {
            max-height: 260px;
            padding: 0 24px 20px;
        }

        /* ===== CTA ===== */
        .cta-section {
            background: linear-gradient(135deg, var(--primary-dark) 0%, var(--primary) 100%);
            padding: 72px 0;
            text-align: center;
            position: relative;
            overflow: hidden;
        }
        .cta-section::before {
            content: '';
            position: absolute;
            inset: 0;
            background: url('/assets/images/backpic/back-2.png') center center / cover no-repeat;
            opacity: 0.08;
            pointer-events: none;
        }
        .cta-section .container {
            position: relative;
            z-index: 2;
        }
        .cta-section h2 {
            color: #fff;
            margin-bottom: 12px;
        }
        .cta-section p {
            color: rgba(255, 255, 255, 0.75);
            font-size: 1.05rem;
            max-width: 540px;
            margin: 0 auto 28px;
        }
        .cta-section .cta-btn {
            display: inline-flex;
            align-items: center;
            gap: 10px;
            padding: 16px 40px;
            background: var(--secondary);
            color: var(--primary-dark);
            font-weight: 700;
            font-size: 1.05rem;
            border-radius: 50px;
            box-shadow: 0 8px 32px rgba(232, 168, 56, 0.35);
            transition: var(--transition);
        }
        .cta-section .cta-btn:hover {
            background: var(--secondary-light);
            transform: translateY(-3px);
            box-shadow: 0 12px 40px rgba(232, 168, 56, 0.45);
        }
        .cta-section .cta-btn i {
            font-size: 1.1rem;
        }

        /* ===== Footer ===== */
        .footer {
            background: var(--bg-dark);
            color: rgba(255, 255, 255, 0.75);
            padding: 56px 0 24px;
        }
        .footer-inner {
            display: grid;
            grid-template-columns: 1.6fr 1fr 1fr 1fr;
            gap: 40px;
            max-width: var(--container-max);
            margin: 0 auto;
            padding: 0 24px;
        }
        .footer-brand .logo {
            margin-bottom: 12px;
        }
        .footer-brand p {
            font-size: 0.9rem;
            color: rgba(255, 255, 255, 0.55);
            max-width: 320px;
            margin-bottom: 0;
        }
        .footer-col h4 {
            color: #fff;
            font-size: 0.95rem;
            margin-bottom: 16px;
            font-weight: 600;
        }
        .footer-col a {
            display: block;
            color: rgba(255, 255, 255, 0.55);
            font-size: 0.88rem;
            padding: 5px 0;
            transition: var(--transition);
        }
        .footer-col a:hover {
            color: var(--secondary);
            padding-left: 4px;
        }
        .footer-bottom {
            margin-top: 40px;
            padding-top: 20px;
            border-top: 1px solid rgba(255, 255, 255, 0.08);
            display: flex;
            justify-content: space-between;
            align-items: center;
            flex-wrap: wrap;
            gap: 12px;
            max-width: var(--container-max);
            margin-left: auto;
            margin-right: auto;
            padding-left: 24px;
            padding-right: 24px;
            font-size: 0.82rem;
            color: rgba(255, 255, 255, 0.4);
        }
        .footer-bottom a {
            color: rgba(255, 255, 255, 0.5);
        }
        .footer-bottom a:hover {
            color: var(--secondary);
        }
        .footer-bottom span {
            display: flex;
            gap: 8px;
            align-items: center;
        }

        /* ===== Scroll to top ===== */
        .scroll-top {
            position: fixed;
            bottom: 32px;
            right: 32px;
            width: 48px;
            height: 48px;
            border-radius: 50%;
            background: var(--primary);
            color: #fff;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.2rem;
            box-shadow: var(--shadow-md);
            z-index: 500;
            opacity: 0;
            transform: translateY(20px);
            pointer-events: none;
            transition: var(--transition);
            border: none;
        }
        .scroll-top.visible {
            opacity: 1;
            transform: translateY(0);
            pointer-events: auto;
        }
        .scroll-top:hover {
            background: var(--primary-light);
            transform: translateY(-4px);
            box-shadow: var(--shadow-lg);
        }

        /* ===== Responsive ===== */
        @media (max-width: 1024px) {
            .footer-inner {
                grid-template-columns: 1fr 1fr;
                gap: 32px;
            }
            .nav-search {
                flex: 0 1 200px;
                min-width: 120px;
            }
        }

        @media (max-width: 768px) {
            :root {
                --header-h: 64px;
            }
            .section {
                padding: 56px 0;
            }
            .hero-cat {
                padding: 110px 0 56px;
                min-height: 400px;
            }
            .hero-cat h1 {
                font-size: clamp(1.8rem, 5vw, 2.4rem);
            }
            .hero-cat p {
                font-size: 0.95rem;
            }
            .nav-links {
                display: none;
            }
            .nav-toggle {
                display: block;
            }
            .nav-search {
                flex: 0 1 140px;
                min-width: 100px;
            }
            .nav-search input {
                padding: 8px 12px 8px 36px;
                font-size: 0.82rem;
            }
            .mobile-menu {
                display: flex;
            }
            .cat-grid {
                grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
                gap: 18px;
            }
            .guide-grid {
                grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
                gap: 18px;
            }
            .stats-grid {
                grid-template-columns: repeat(2, 1fr);
                gap: 16px;
            }
            .stat-item .stat-number {
                font-size: 2rem;
            }
            .latest-item {
                flex-wrap: wrap;
                padding: 14px 16px;
                gap: 12px;
            }
            .latest-item .latest-num {
                font-size: 1.1rem;
                min-width: 28px;
            }
            .latest-item .latest-tag {
                font-size: 0.7rem;
                padding: 3px 10px;
            }
            .footer-inner {
                grid-template-columns: 1fr;
                gap: 24px;
            }
            .footer-bottom {
                flex-direction: column;
                text-align: center;
            }
            .scroll-top {
                bottom: 20px;
                right: 20px;
                width: 42px;
                height: 42px;
                font-size: 1rem;
            }
            .hero-cat .hero-search {
                flex-direction: row;
                border-radius: 40px;
            }
            .hero-cat .hero-search button {
                padding: 12px 20px;
                font-size: 0.85rem;
                border-radius: 0 40px 40px 0;
            }
            .hero-cat .hero-search input {
                padding: 12px 16px;
                font-size: 0.9rem;
            }
            .cta-section {
                padding: 48px 0;
            }
            .cta-section .cta-btn {
                padding: 14px 28px;
                font-size: 0.95rem;
            }
        }

        @media (max-width: 520px) {
            .container {
                padding: 0 16px;
            }
            .hero-cat {
                padding: 100px 0 40px;
                min-height: 340px;
            }
            .hero-cat h1 {
                font-size: 1.6rem;
            }
            .hero-cat .hero-tags a {
                font-size: 0.75rem;
                padding: 4px 12px;
            }
            .cat-grid {
                grid-template-columns: 1fr;
            }
            .guide-grid {
                grid-template-columns: 1fr;
            }
            .stats-grid {
                grid-template-columns: 1fr 1fr;
                gap: 12px;
            }
            .stat-item {
                padding: 20px 12px;
            }
            .stat-item .stat-number {
                font-size: 1.6rem;
            }
            .stat-item .stat-label {
                font-size: 0.82rem;
            }
            .latest-item .latest-content h4 {
                font-size: 0.9rem;
            }
            .latest-item .latest-content p {
                font-size: 0.78rem;
            }
            .faq-item .faq-question {
                padding: 14px 16px;
                font-size: 0.92rem;
            }
            .faq-item .faq-answer {
                font-size: 0.88rem;
            }
            .section-title h2 {
                font-size: 1.4rem;
            }
            .nav-search {
                flex: 0 1 100px;
                min-width: 80px;
            }
            .nav-search input {
                padding: 6px 10px 6px 32px;
                font-size: 0.78rem;
            }
            .nav-search .fa-search {
                left: 12px;
                font-size: 0.75rem;
            }
            .logo {
                font-size: 1.2rem;
            }
            .logo .logo-icon {
                width: 32px;
                height: 32px;
                font-size: 1rem;
            }
        }

        @media (min-width: 769px) {
            .mobile-menu {
                display: none !important;
            }
        }

        /* ===== Focus / Accessibility ===== */
        a:focus-visible,
        button:focus-visible,
        input:focus-visible {
            outline: 3px solid var(--secondary);
            outline-offset: 3px;
            border-radius: 4px;
        }
        .cat-card:focus-visible,
        .guide-card:focus-visible {
            outline: 3px solid var(--secondary);
            outline-offset: 4px;
        }

/* roulang page: article */
/* ===== 设计变量 ===== */
:root {
    --primary: #1a73e8;
    --primary-dark: #0d47a1;
    --primary-light: #e8f0fe;
    --secondary: #f59e0b;
    --secondary-light: #fef3c7;
    --accent: #06b6d4;
    --bg: #ffffff;
    --bg-alt: #f8fafc;
    --bg-dark: #0f172a;
    --text: #1e293b;
    --text-light: #64748b;
    --text-white: #f1f5f9;
    --border: #e2e8f0;
    --border-light: #f1f5f9;
    --radius: 12px;
    --radius-sm: 8px;
    --radius-lg: 20px;
    --shadow: 0 4px 20px rgba(0,0,0,0.06);
    --shadow-md: 0 8px 32px rgba(0,0,0,0.10);
    --shadow-lg: 0 16px 48px rgba(0,0,0,0.14);
    --transition: 0.25s cubic-bezier(0.4,0,0.2,1);
    --font: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, 'Noto Sans SC', sans-serif;
    --max-width: 1200px;
    --nav-height: 68px;
}
/* ===== Reset & Base ===== */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; -webkit-font-smoothing: antialiased; }
body { font-family: var(--font); font-size: 16px; line-height: 1.7; color: var(--text); background: var(--bg); }
a { color: var(--primary); text-decoration: none; transition: color var(--transition); }
a:hover { color: var(--primary-dark); }
img { max-width: 100%; height: auto; display: block; }
button, input, textarea { font-family: inherit; font-size: inherit; }
ul, ol { list-style: none; }
h1, h2, h3, h4, h5, h6 { line-height: 1.3; font-weight: 700; color: var(--text); }
.container { width: 100%; max-width: var(--max-width); margin: 0 auto; padding: 0 24px; }
.section { padding: 80px 0; }
.section-alt { background: var(--bg-alt); }
.section-dark { background: var(--bg-dark); color: var(--text-white); }
.section-title { font-size: 2rem; margin-bottom: 12px; letter-spacing: -0.02em; }
.section-subtitle { font-size: 1.1rem; color: var(--text-light); max-width: 640px; margin-bottom: 48px; }
.section-dark .section-title { color: var(--text-white); }
.section-dark .section-subtitle { color: var(--text-white); opacity: 0.75; }
.btn { display: inline-flex; align-items: center; gap: 8px; padding: 12px 28px; border-radius: var(--radius-sm); font-weight: 600; font-size: 0.95rem; border: none; cursor: pointer; transition: all var(--transition); text-decoration: none; }
.btn-primary { background: var(--primary); color: #fff; }
.btn-primary:hover { background: var(--primary-dark); color: #fff; transform: translateY(-2px); box-shadow: 0 8px 24px rgba(26,115,232,0.3); }
.btn-secondary { background: var(--secondary); color: #fff; }
.btn-secondary:hover { background: #d97706; color: #fff; transform: translateY(-2px); box-shadow: 0 8px 24px rgba(245,158,11,0.3); }
.btn-outline { background: transparent; border: 2px solid var(--primary); color: var(--primary); }
.btn-outline:hover { background: var(--primary); color: #fff; transform: translateY(-2px); }
.btn-white { background: #fff; color: var(--primary); }
.btn-white:hover { background: var(--primary-light); color: var(--primary-dark); transform: translateY(-2px); }
.badge { display: inline-block; padding: 4px 14px; border-radius: 50px; font-size: 0.8rem; font-weight: 600; background: var(--primary-light); color: var(--primary); }
.badge-secondary { background: var(--secondary-light); color: #b45309; }
.tag { display: inline-block; padding: 4px 14px; border-radius: 50px; font-size: 0.8rem; font-weight: 500; background: var(--bg-alt); color: var(--text-light); border: 1px solid var(--border); transition: all var(--transition); cursor: pointer; }
.tag:hover { background: var(--primary-light); color: var(--primary); border-color: var(--primary); }
/* ===== 导航 ===== */
.header { position: sticky; top: 0; z-index: 100; background: rgba(255,255,255,0.95); backdrop-filter: blur(12px); border-bottom: 1px solid var(--border); height: var(--nav-height); }
.header-inner { max-width: var(--max-width); margin: 0 auto; padding: 0 24px; height: 100%; display: flex; align-items: center; justify-content: space-between; }
.logo { display: flex; align-items: center; gap: 8px; font-size: 1.35rem; font-weight: 800; color: var(--text); text-decoration: none; letter-spacing: -0.03em; }
.logo:hover { color: var(--primary); }
.logo .logo-icon { display: inline-flex; align-items: center; justify-content: center; width: 36px; height: 36px; background: var(--primary); color: #fff; border-radius: var(--radius-sm); font-weight: 800; font-size: 1.1rem; }
.logo span { color: var(--primary); }
.nav-links { display: flex; align-items: center; gap: 4px; }
.nav-links a { display: block; padding: 8px 18px; border-radius: var(--radius-sm); font-size: 0.92rem; font-weight: 500; color: var(--text-light); text-decoration: none; transition: all var(--transition); }
.nav-links a:hover { background: var(--bg-alt); color: var(--text); }
.nav-links a.active { background: var(--primary-light); color: var(--primary); font-weight: 600; }
.nav-actions { display: flex; align-items: center; gap: 12px; }
.nav-actions .search-toggle { display: flex; align-items: center; justify-content: center; width: 40px; height: 40px; border-radius: 50%; border: none; background: transparent; color: var(--text-light); font-size: 1.1rem; cursor: pointer; transition: all var(--transition); }
.nav-actions .search-toggle:hover { background: var(--bg-alt); color: var(--text); }
.mobile-toggle { display: none; flex-direction: column; gap: 5px; background: none; border: none; cursor: pointer; padding: 8px; }
.mobile-toggle span { display: block; width: 24px; height: 2px; background: var(--text); border-radius: 2px; transition: all var(--transition); }
/* ===== 文章页 ===== */
.article-hero { position: relative; padding: 60px 0 40px; background: var(--bg-alt); border-bottom: 1px solid var(--border); }
.article-hero .container { max-width: 820px; }
.article-meta { display: flex; flex-wrap: wrap; align-items: center; gap: 12px 20px; margin-bottom: 20px; font-size: 0.92rem; color: var(--text-light); }
.article-meta .meta-item { display: flex; align-items: center; gap: 6px; }
.article-meta .meta-item i { font-size: 0.85rem; }
.article-hero h1 { font-size: 2.4rem; font-weight: 800; letter-spacing: -0.02em; line-height: 1.25; margin-bottom: 20px; color: var(--text); }
.article-hero .article-desc { font-size: 1.12rem; color: var(--text-light); line-height: 1.7; max-width: 720px; }
.article-featured-image { margin-top: 32px; border-radius: var(--radius); overflow: hidden; box-shadow: var(--shadow-md); }
.article-featured-image img { width: 100%; height: 420px; object-fit: cover; }
.article-body-wrap { max-width: 820px; margin: 0 auto; padding: 48px 24px 64px; }
.article-body { font-size: 1.05rem; line-height: 1.85; color: var(--text); }
.article-body h2 { font-size: 1.65rem; margin-top: 48px; margin-bottom: 16px; letter-spacing: -0.01em; }
.article-body h3 { font-size: 1.35rem; margin-top: 32px; margin-bottom: 12px; }
.article-body p { margin-bottom: 20px; }
.article-body ul, .article-body ol { margin-bottom: 20px; padding-left: 24px; }
.article-body li { margin-bottom: 8px; list-style: disc; }
.article-body ol li { list-style: decimal; }
.article-body blockquote { border-left: 4px solid var(--primary); padding: 16px 24px; margin: 24px 0; background: var(--primary-light); border-radius: 0 var(--radius-sm) var(--radius-sm) 0; font-style: italic; color: var(--text-light); }
.article-body img { border-radius: var(--radius-sm); margin: 24px 0; }
.article-body a { color: var(--primary); text-decoration: underline; text-underline-offset: 2px; }
.article-body a:hover { color: var(--primary-dark); }
.article-body code { background: var(--bg-alt); padding: 2px 8px; border-radius: 4px; font-size: 0.9em; font-family: 'JetBrains Mono', monospace; }
.article-body pre { background: var(--bg-dark); color: var(--text-white); padding: 24px; border-radius: var(--radius-sm); overflow-x: auto; margin: 24px 0; font-size: 0.9rem; line-height: 1.6; }
.article-tags { display: flex; flex-wrap: wrap; gap: 10px; margin-top: 40px; padding-top: 28px; border-top: 1px solid var(--border); }
.article-not-found { text-align: center; padding: 80px 24px; }
.article-not-found i { font-size: 3rem; color: var(--text-light); margin-bottom: 20px; }
.article-not-found h2 { font-size: 1.8rem; margin-bottom: 12px; }
.article-not-found p { color: var(--text-light); margin-bottom: 24px; }
/* ===== 相关推荐 ===== */
.related-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 24px; }
.related-card { background: var(--bg); border-radius: var(--radius); overflow: hidden; box-shadow: var(--shadow); transition: all var(--transition); border: 1px solid var(--border); }
.related-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-md); }
.related-card .card-img { width: 100%; height: 180px; object-fit: cover; }
.related-card .card-body { padding: 18px 20px 22px; }
.related-card .card-body h3 { font-size: 1rem; font-weight: 600; margin-bottom: 8px; display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden; }
.related-card .card-body p { font-size: 0.88rem; color: var(--text-light); display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden; margin-bottom: 12px; }
.related-card .card-body .meta { font-size: 0.8rem; color: var(--text-light); display: flex; align-items: center; gap: 12px; }
/* ===== FAQ ===== */
.faq-grid { max-width: 800px; margin: 0 auto; display: flex; flex-direction: column; gap: 16px; }
.faq-item { background: var(--bg); border-radius: var(--radius); border: 1px solid var(--border); overflow: hidden; transition: all var(--transition); }
.faq-item:hover { border-color: var(--primary-light); }
.faq-question { width: 100%; display: flex; align-items: center; justify-content: space-between; padding: 20px 24px; background: none; border: none; cursor: pointer; font-size: 1.05rem; font-weight: 600; color: var(--text); text-align: left; transition: all var(--transition); }
.faq-question i { font-size: 0.85rem; color: var(--text-light); transition: transform var(--transition); }
.faq-item.active .faq-question i { transform: rotate(180deg); color: var(--primary); }
.faq-answer { max-height: 0; overflow: hidden; transition: max-height 0.35s ease, padding 0.35s ease; padding: 0 24px; }
.faq-item.active .faq-answer { max-height: 300px; padding: 0 24px 20px; }
.faq-answer p { color: var(--text-light); font-size: 0.95rem; line-height: 1.7; }
/* ===== CTA ===== */
.cta-section { background: var(--bg-dark); padding: 80px 0; text-align: center; }
.cta-section .section-title { color: var(--text-white); }
.cta-section .section-subtitle { color: var(--text-white); opacity: 0.8; margin: 0 auto 36px; }
.cta-buttons { display: flex; justify-content: center; gap: 16px; flex-wrap: wrap; }
/* ===== 页脚 ===== */
.footer { background: var(--bg-dark); color: var(--text-white); padding: 60px 0 0; }
.footer-inner { max-width: var(--max-width); margin: 0 auto; padding: 0 24px; display: grid; grid-template-columns: 2fr 1fr 1fr 1fr; gap: 40px; }
.footer-brand .logo { color: var(--text-white); font-size: 1.4rem; margin-bottom: 16px; }
.footer-brand .logo span { color: var(--primary); }
.footer-brand p { font-size: 0.92rem; opacity: 0.7; line-height: 1.7; max-width: 320px; }
.footer-col h4 { font-size: 1rem; font-weight: 600; margin-bottom: 18px; color: var(--text-white); }
.footer-col a { display: block; color: var(--text-white); opacity: 0.65; font-size: 0.9rem; margin-bottom: 10px; transition: all var(--transition); text-decoration: none; }
.footer-col a:hover { opacity: 1; color: var(--primary); padding-left: 4px; }
.footer-bottom { max-width: var(--max-width); margin: 0 auto; padding: 28px 24px; border-top: 1px solid rgba(255,255,255,0.08); display: flex; justify-content: space-between; align-items: center; flex-wrap: wrap; gap: 12px; font-size: 0.85rem; opacity: 0.6; }
.footer-bottom a { color: var(--text-white); opacity: 0.8; text-decoration: none; }
.footer-bottom a:hover { opacity: 1; color: var(--primary); }
/* ===== 响应式 ===== */
@media (max-width: 1024px) {
    .related-grid { grid-template-columns: repeat(2, 1fr); }
    .footer-inner { grid-template-columns: 1fr 1fr; }
    .article-hero h1 { font-size: 2rem; }
}
@media (max-width: 768px) {
    .nav-links { display: none; flex-direction: column; position: absolute; top: var(--nav-height); left: 0; right: 0; background: rgba(255,255,255,0.98); backdrop-filter: blur(12px); border-bottom: 1px solid var(--border); padding: 12px 24px; gap: 4px; }
    .nav-links.open { display: flex; }
    .nav-links a { padding: 12px 16px; font-size: 1rem; }
    .mobile-toggle { display: flex; }
    .article-hero h1 { font-size: 1.6rem; }
    .article-hero { padding: 40px 0 28px; }
    .article-featured-image img { height: 240px; }
    .article-body-wrap { padding: 32px 16px 48px; }
    .article-body { font-size: 1rem; }
    .section { padding: 56px 0; }
    .section-title { font-size: 1.55rem; }
    .related-grid { grid-template-columns: 1fr; }
    .faq-question { font-size: 0.95rem; padding: 16px 18px; }
    .footer-inner { grid-template-columns: 1fr; gap: 32px; }
    .footer-bottom { flex-direction: column; text-align: center; }
    .cta-section { padding: 56px 24px; }
}
@media (max-width: 520px) {
    .container { padding: 0 16px; }
    .article-hero h1 { font-size: 1.35rem; }
    .article-meta { font-size: 0.82rem; gap: 8px 14px; }
    .btn { padding: 10px 20px; font-size: 0.88rem; }
    .badge, .tag { font-size: 0.72rem; padding: 3px 10px; }
    .article-body h2 { font-size: 1.35rem; }
    .article-body h3 { font-size: 1.15rem; }
    .article-featured-image img { height: 180px; }
}