/* roulang page: index */
/* ===== Design Variables ===== */
        :root {
            --primary: #0d3b6f;
            --primary-dark: #072349;
            --primary-light: #2a6cb8;
            --accent: #f5a623;
            --accent-dark: #d4891a;
            --accent-light: #ffe082;
            --bg-light: #f7f9fc;
            --bg-white: #ffffff;
            --bg-dark: #0a1929;
            --bg-card: #ffffff;
            --text-primary: #1a2332;
            --text-secondary: #4a5a6a;
            --text-light: #7a8a9a;
            --text-white: #f0f4f8;
            --border: #e2e8f0;
            --border-light: #f0f2f5;
            --radius: 14px;
            --radius-sm: 8px;
            --radius-lg: 20px;
            --shadow: 0 4px 24px rgba(13, 59, 111, 0.08);
            --shadow-lg: 0 12px 48px rgba(13, 59, 111, 0.14);
            --shadow-accent: 0 4px 20px rgba(245, 166, 35, 0.3);
            --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
            --font-family: 'Segoe UI', 'PingFang SC', 'Microsoft YaHei', 'Helvetica Neue', Arial, sans-serif;
            --max-width: 1200px;
            --nav-height: 72px;
        }

        /* ===== Reset & Base ===== */
        *, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
        html { scroll-behavior: smooth; font-size: 16px; }
        body {
            font-family: var(--font-family);
            color: var(--text-primary);
            background: var(--bg-light);
            line-height: 1.7;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
        }
        a { color: var(--primary); text-decoration: none; transition: var(--transition); }
        a:hover { color: var(--primary-light); }
        a:focus-visible { outline: 3px solid var(--accent); outline-offset: 2px; border-radius: 4px; }
        img { max-width: 100%; height: auto; display: block; border-radius: var(--radius-sm); }
        ul, ol { list-style: none; padding: 0; margin: 0; }
        h1, h2, h3, h4, h5, h6 { line-height: 1.3; font-weight: 700; color: var(--text-primary); }
        p { margin-bottom: 1rem; color: var(--text-secondary); }
        button, input, textarea, select { font-family: inherit; font-size: inherit; }
        button { cursor: pointer; border: none; background: none; }
        .clearfix::after { content: ''; display: table; clear: both; }

        /* ===== Container ===== */
        .container { max-width: var(--max-width); margin: 0 auto; padding: 0 24px; width: 100%; }
        .container-narrow { max-width: 900px; margin: 0 auto; padding: 0 24px; }

        /* ===== Typography ===== */
        .section-title {
            font-size: 2.2rem;
            font-weight: 800;
            text-align: center;
            margin-bottom: 0.5rem;
            letter-spacing: -0.5px;
            color: var(--text-primary);
        }
        .section-sub {
            font-size: 1.1rem;
            text-align: center;
            color: var(--text-secondary);
            max-width: 640px;
            margin: 0 auto 3rem;
            line-height: 1.6;
        }
        .section-sub i { color: var(--accent); margin-right: 6px; }
        @media (max-width: 768px) {
            .section-title { font-size: 1.7rem; }
            .section-sub { font-size: 1rem; margin-bottom: 2rem; }
        }

        /* ===== Header / Nav ===== */
        .site-header {
            position: sticky;
            top: 0;
            z-index: 1000;
            background: var(--bg-dark);
            box-shadow: 0 2px 20px rgba(0,0,0,0.25);
            height: var(--nav-height);
            display: flex;
            align-items: center;
        }
        .site-header .container {
            display: flex;
            align-items: center;
            justify-content: space-between;
        }
        .logo {
            font-size: 1.5rem;
            font-weight: 800;
            color: var(--text-white);
            letter-spacing: -0.3px;
            display: flex;
            align-items: center;
            gap: 10px;
        }
        .logo i { color: var(--accent); font-size: 1.6rem; }
        .logo span { background: linear-gradient(135deg, #fff 60%, var(--accent-light)); -webkit-background-clip: text; -webkit-text-fill-color: transparent; background-clip: text; }
        .logo:hover span { background: linear-gradient(135deg, var(--accent-light), #fff); -webkit-background-clip: text; -webkit-text-fill-color: transparent; background-clip: text; }
        .nav-links { display: flex; align-items: center; gap: 8px; }
        .nav-links a {
            color: var(--text-white);
            padding: 8px 18px;
            border-radius: var(--radius-sm);
            font-weight: 500;
            font-size: 0.95rem;
            transition: var(--transition);
            position: relative;
        }
        .nav-links a:hover { background: rgba(255,255,255,0.08); color: var(--accent); }
        .nav-links a.active { color: var(--accent); background: rgba(245,166,35,0.12); }
        .nav-links a.active::after { content: ''; position: absolute; bottom: 2px; left: 50%; transform: translateX(-50%); width: 20px; height: 3px; background: var(--accent); border-radius: 4px; }
        .nav-cta {
            background: var(--accent) !important;
            color: var(--primary-dark) !important;
            padding: 10px 26px !important;
            border-radius: 50px !important;
            font-weight: 700 !important;
            box-shadow: var(--shadow-accent);
            margin-left: 12px;
        }
        .nav-cta:hover { background: var(--accent-dark) !important; transform: translateY(-2px); box-shadow: 0 6px 24px rgba(245,166,35,0.4); }
        .hamburger { display: none; flex-direction: column; gap: 5px; cursor: pointer; padding: 8px; background: none; border: none; }
        .hamburger span { width: 28px; height: 3px; background: var(--text-white); border-radius: 4px; transition: var(--transition); }
        .hamburger.active span:nth-child(1) { transform: rotate(45deg) translate(6px, 6px); }
        .hamburger.active span:nth-child(2) { opacity: 0; }
        .hamburger.active span:nth-child(3) { transform: rotate(-45deg) translate(6px, -6px); }
        @media (max-width: 768px) {
            .hamburger { display: flex; }
            .nav-links {
                position: fixed;
                top: var(--nav-height);
                left: 0;
                right: 0;
                background: var(--bg-dark);
                flex-direction: column;
                padding: 20px 24px 30px;
                gap: 6px;
                transform: translateY(-120%);
                opacity: 0;
                transition: var(--transition);
                box-shadow: 0 20px 40px rgba(0,0,0,0.3);
                border-top: 1px solid rgba(255,255,255,0.06);
                z-index: 999;
                align-items: stretch;
            }
            .nav-links.open { transform: translateY(0); opacity: 1; }
            .nav-links a { padding: 12px 16px; font-size: 1rem; text-align: center; }
            .nav-cta { margin-left: 0; margin-top: 8px; text-align: center; }
        }

        /* ===== Hero ===== */
        .hero {
            background: linear-gradient(135deg, var(--bg-dark) 0%, #0f2a44 60%, #1a3f64 100%);
            min-height: 88vh;
            display: flex;
            align-items: center;
            position: relative;
            overflow: hidden;
            padding: 80px 0 60px;
        }
        .hero::before {
            content: '';
            position: absolute;
            inset: 0;
            background: url('/assets/images/backpic/back-1.png') center center / cover no-repeat;
            opacity: 0.18;
            mix-blend-mode: overlay;
        }
        .hero .container { position: relative; z-index: 2; }
        .hero-badge {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            background: rgba(245,166,35,0.15);
            color: var(--accent);
            padding: 6px 20px;
            border-radius: 50px;
            font-size: 0.85rem;
            font-weight: 600;
            margin-bottom: 24px;
            border: 1px solid rgba(245,166,35,0.25);
        }
        .hero-badge i { font-size: 0.8rem; }
        .hero h1 {
            font-size: 3.4rem;
            font-weight: 900;
            color: var(--text-white);
            max-width: 780px;
            line-height: 1.2;
            letter-spacing: -1px;
            margin-bottom: 20px;
        }
        .hero h1 .highlight { color: var(--accent); }
        .hero p {
            font-size: 1.2rem;
            color: rgba(255,255,255,0.75);
            max-width: 600px;
            margin-bottom: 32px;
            line-height: 1.7;
        }
        .hero-actions { display: flex; gap: 16px; flex-wrap: wrap; }
        .hero-actions .btn-primary {
            background: var(--accent);
            color: var(--primary-dark);
            padding: 16px 40px;
            border-radius: 50px;
            font-weight: 700;
            font-size: 1.05rem;
            box-shadow: var(--shadow-accent);
            transition: var(--transition);
            display: inline-flex;
            align-items: center;
            gap: 10px;
        }
        .hero-actions .btn-primary:hover { background: var(--accent-dark); transform: translateY(-3px); box-shadow: 0 8px 30px rgba(245,166,35,0.45); }
        .hero-actions .btn-outline {
            background: transparent;
            color: var(--text-white);
            border: 2px solid rgba(255,255,255,0.25);
            padding: 14px 34px;
            border-radius: 50px;
            font-weight: 600;
            font-size: 1.05rem;
            transition: var(--transition);
            display: inline-flex;
            align-items: center;
            gap: 8px;
        }
        .hero-actions .btn-outline:hover { border-color: var(--accent); color: var(--accent); background: rgba(245,166,35,0.08); }
        .hero-stats {
            display: flex;
            gap: 40px;
            margin-top: 50px;
            padding-top: 40px;
            border-top: 1px solid rgba(255,255,255,0.08);
        }
        .hero-stats .stat-item { text-align: center; }
        .hero-stats .stat-number { font-size: 2rem; font-weight: 800; color: var(--accent); display: block; }
        .hero-stats .stat-label { font-size: 0.9rem; color: rgba(255,255,255,0.55); margin-top: 4px; }
        @media (max-width: 768px) {
            .hero { min-height: 70vh; padding: 60px 0 40px; }
            .hero h1 { font-size: 2.2rem; }
            .hero p { font-size: 1rem; }
            .hero-actions .btn-primary, .hero-actions .btn-outline { width: 100%; justify-content: center; }
            .hero-stats { gap: 20px; flex-wrap: wrap; justify-content: center; }
            .hero-stats .stat-number { font-size: 1.5rem; }
        }
        @media (max-width: 520px) {
            .hero h1 { font-size: 1.7rem; }
            .hero-stats { flex-direction: column; gap: 16px; align-items: center; }
        }

        /* ===== Section Spacing ===== */
        .section { padding: 80px 0; }
        .section-alt { background: var(--bg-white); }
        .section-dark { background: var(--bg-dark); color: var(--text-white); }
        .section-dark .section-title { color: var(--text-white); }
        .section-dark .section-sub { color: rgba(255,255,255,0.65); }
        @media (max-width: 768px) { .section { padding: 50px 0; } }

        /* ===== Cards ===== */
        .card {
            background: var(--bg-card);
            border-radius: var(--radius);
            box-shadow: var(--shadow);
            padding: 32px 28px;
            transition: var(--transition);
            border: 1px solid var(--border-light);
            height: 100%;
            display: flex;
            flex-direction: column;
        }
        .card:hover { transform: translateY(-6px); box-shadow: var(--shadow-lg); }
        .card-icon { font-size: 2.2rem; color: var(--accent); margin-bottom: 18px; }
        .card h3 { font-size: 1.25rem; font-weight: 700; margin-bottom: 10px; }
        .card p { font-size: 0.95rem; color: var(--text-secondary); flex: 1; margin-bottom: 0; }
        .card-photo {
            border-radius: var(--radius) var(--radius) 0 0;
            width: 100%;
            aspect-ratio: 16 / 10;
            object-fit: cover;
        }
        .card-photo-wrapper { overflow: hidden; border-radius: var(--radius) var(--radius) 0 0; margin: -32px -28px 20px; }
        .card-photo-wrapper img { border-radius: 0; transition: var(--transition); width: 100%; }
        .card:hover .card-photo-wrapper img { transform: scale(1.05); }
        .card-tag {
            display: inline-block;
            background: rgba(245,166,35,0.12);
            color: var(--accent-dark);
            font-size: 0.75rem;
            font-weight: 600;
            padding: 3px 14px;
            border-radius: 50px;
            margin-bottom: 12px;
            align-self: flex-start;
        }
        .card-link { margin-top: 16px; font-weight: 600; color: var(--primary); display: inline-flex; align-items: center; gap: 6px; }
        .card-link i { font-size: 0.8rem; transition: var(--transition); }
        .card-link:hover i { transform: translateX(4px); }

        /* ===== Grid Helpers ===== */
        .grid-3 { display: grid; grid-template-columns: repeat(3, 1fr); gap: 30px; }
        .grid-2 { display: grid; grid-template-columns: repeat(2, 1fr); gap: 30px; }
        .grid-4 { display: grid; grid-template-columns: repeat(4, 1fr); gap: 24px; }
        @media (max-width: 1024px) { .grid-4 { grid-template-columns: repeat(2, 1fr); } }
        @media (max-width: 768px) { .grid-3 { grid-template-columns: 1fr; } .grid-2 { grid-template-columns: 1fr; } .grid-4 { grid-template-columns: 1fr; } }

        /* ===== Features (图文混合) ===== */
        .feature-row {
            display: flex;
            align-items: center;
            gap: 50px;
            margin-bottom: 60px;
        }
        .feature-row.reverse { flex-direction: row-reverse; }
        .feature-row:last-child { margin-bottom: 0; }
        .feature-image { flex: 1; border-radius: var(--radius); overflow: hidden; box-shadow: var(--shadow-lg); }
        .feature-image img { width: 100%; border-radius: 0; }
        .feature-content { flex: 1; }
        .feature-content h3 { font-size: 1.6rem; font-weight: 700; margin-bottom: 14px; }
        .feature-content p { font-size: 1rem; color: var(--text-secondary); line-height: 1.7; }
        .feature-content ul { margin-top: 16px; }
        .feature-content ul li { padding: 6px 0; display: flex; align-items: center; gap: 10px; color: var(--text-secondary); }
        .feature-content ul li i { color: var(--accent); font-size: 0.9rem; }
        @media (max-width: 768px) {
            .feature-row { flex-direction: column !important; gap: 30px; margin-bottom: 40px; }
            .feature-content h3 { font-size: 1.3rem; }
        }

        /* ===== Steps / Flow ===== */
        .steps-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 20px; counter-reset: step; }
        .step-item {
            text-align: center;
            padding: 28px 16px;
            background: var(--bg-white);
            border-radius: var(--radius);
            box-shadow: var(--shadow);
            border: 1px solid var(--border-light);
            position: relative;
            transition: var(--transition);
        }
        .step-item:hover { transform: translateY(-4px); box-shadow: var(--shadow-lg); }
        .step-item::before {
            counter-increment: step;
            content: counter(step);
            display: block;
            width: 44px;
            height: 44px;
            line-height: 44px;
            background: var(--primary);
            color: #fff;
            border-radius: 50%;
            font-weight: 800;
            font-size: 1.1rem;
            margin: 0 auto 16px;
        }
        .step-item h4 { font-size: 1.05rem; font-weight: 700; margin-bottom: 8px; }
        .step-item p { font-size: 0.9rem; color: var(--text-secondary); margin-bottom: 0; }
        .step-arrow { display: flex; align-items: center; justify-content: center; font-size: 1.4rem; color: var(--accent); }
        @media (max-width: 768px) { .steps-grid { grid-template-columns: 1fr 1fr; gap: 16px; } }
        @media (max-width: 520px) { .steps-grid { grid-template-columns: 1fr; } }

        /* ===== Stats / Numbers ===== */
        .stats-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 24px; }
        .stat-card {
            text-align: center;
            padding: 36px 20px;
            background: rgba(255,255,255,0.04);
            border-radius: var(--radius);
            border: 1px solid rgba(255,255,255,0.06);
            transition: var(--transition);
        }
        .stat-card:hover { background: rgba(255,255,255,0.08); }
        .stat-card .num { font-size: 2.6rem; font-weight: 900; color: var(--accent); display: block; }
        .stat-card .label { font-size: 0.95rem; color: rgba(255,255,255,0.6); margin-top: 6px; }
        @media (max-width: 768px) { .stats-grid { grid-template-columns: repeat(2, 1fr); gap: 16px; } .stat-card .num { font-size: 2rem; } }
        @media (max-width: 520px) { .stats-grid { grid-template-columns: 1fr; } }

        /* ===== FAQ ===== */
        .faq-list { max-width: 800px; margin: 0 auto; }
        .faq-item {
            background: var(--bg-white);
            border-radius: var(--radius-sm);
            margin-bottom: 12px;
            box-shadow: 0 2px 10px rgba(0,0,0,0.04);
            border: 1px solid var(--border-light);
            overflow: hidden;
            transition: var(--transition);
        }
        .faq-item:hover { box-shadow: var(--shadow); }
        .faq-question {
            padding: 18px 24px;
            font-weight: 600;
            font-size: 1rem;
            color: var(--text-primary);
            cursor: pointer;
            display: flex;
            justify-content: space-between;
            align-items: center;
            background: none;
            width: 100%;
            text-align: left;
            border: none;
        }
        .faq-question i { color: var(--accent); transition: var(--transition); font-size: 0.9rem; }
        .faq-item.active .faq-question i { transform: rotate(180deg); }
        .faq-answer {
            padding: 0 24px 18px;
            font-size: 0.95rem;
            color: var(--text-secondary);
            line-height: 1.7;
            display: none;
        }
        .faq-item.active .faq-answer { display: block; }

        /* ===== CTA ===== */
        .cta-section {
            background: linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 100%);
            padding: 80px 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: 0.06;
        }
        .cta-section .container { position: relative; z-index: 2; }
        .cta-section h2 { font-size: 2.4rem; font-weight: 800; color: var(--text-white); margin-bottom: 16px; }
        .cta-section p { font-size: 1.1rem; color: rgba(255,255,255,0.7); max-width: 560px; margin: 0 auto 32px; }
        .cta-section .btn-cta {
            background: var(--accent);
            color: var(--primary-dark);
            padding: 18px 48px;
            border-radius: 50px;
            font-weight: 700;
            font-size: 1.1rem;
            box-shadow: var(--shadow-accent);
            transition: var(--transition);
            display: inline-flex;
            align-items: center;
            gap: 12px;
        }
        .cta-section .btn-cta:hover { background: var(--accent-dark); transform: translateY(-3px); box-shadow: 0 8px 30px rgba(245,166,35,0.45); }
        @media (max-width: 768px) {
            .cta-section { padding: 50px 0; }
            .cta-section h2 { font-size: 1.7rem; }
            .cta-section .btn-cta { width: 100%; justify-content: center; }
        }

        /* ===== Footer ===== */
        .site-footer {
            background: var(--bg-dark);
            color: rgba(255,255,255,0.6);
            padding: 50px 0 30px;
        }
        .footer-grid { display: grid; grid-template-columns: 2fr 1fr 1fr 1fr; gap: 40px; margin-bottom: 36px; }
        .footer-brand .logo { margin-bottom: 14px; font-size: 1.3rem; }
        .footer-brand p { font-size: 0.9rem; color: rgba(255,255,255,0.5); max-width: 300px; line-height: 1.7; }
        .footer-col h4 { color: var(--text-white); font-size: 1rem; font-weight: 700; margin-bottom: 16px; }
        .footer-col a { display: block; padding: 4px 0; font-size: 0.9rem; color: rgba(255,255,255,0.5); transition: var(--transition); }
        .footer-col a:hover { color: var(--accent); padding-left: 4px; }
        .footer-bottom {
            border-top: 1px solid rgba(255,255,255,0.06);
            padding-top: 24px;
            display: flex;
            justify-content: space-between;
            flex-wrap: wrap;
            gap: 12px;
            font-size: 0.85rem;
            color: rgba(255,255,255,0.35);
        }
        .footer-bottom a { color: rgba(255,255,255,0.35); }
        .footer-bottom a:hover { color: var(--accent); }
        @media (max-width: 768px) { .footer-grid { grid-template-columns: 1fr 1fr; gap: 30px; } .footer-brand { grid-column: 1 / -1; } }
        @media (max-width: 520px) { .footer-grid { grid-template-columns: 1fr; } .footer-bottom { flex-direction: column; text-align: center; } }

        /* ===== Breadcrumb (inner pages) ===== */
        .breadcrumb { padding: 18px 0; font-size: 0.9rem; color: var(--text-light); background: var(--bg-white); border-bottom: 1px solid var(--border-light); }
        .breadcrumb a { color: var(--text-light); }
        .breadcrumb a:hover { color: var(--primary); }
        .breadcrumb span { color: var(--text-secondary); font-weight: 500; }

        /* ===== Posts / Article List ===== */
        .post-item {
            display: flex;
            gap: 20px;
            padding: 20px 0;
            border-bottom: 1px solid var(--border-light);
            transition: var(--transition);
        }
        .post-item:last-child { border-bottom: none; }
        .post-item:hover { padding-left: 8px; }
        .post-thumb { width: 160px; min-height: 100px; border-radius: var(--radius-sm); overflow: hidden; flex-shrink: 0; background: var(--border); }
        .post-thumb img { width: 100%; height: 100%; object-fit: cover; border-radius: 0; }
        .post-info { flex: 1; }
        .post-info h3 { font-size: 1.1rem; font-weight: 700; margin-bottom: 6px; }
        .post-info h3 a { color: var(--text-primary); }
        .post-info h3 a:hover { color: var(--primary); }
        .post-meta { font-size: 0.8rem; color: var(--text-light); display: flex; gap: 16px; margin-bottom: 8px; }
        .post-meta i { margin-right: 4px; }
        .post-excerpt { font-size: 0.9rem; color: var(--text-secondary); line-height: 1.6; }
        .post-cat {
            display: inline-block;
            background: rgba(13,59,111,0.08);
            color: var(--primary);
            font-size: 0.7rem;
            font-weight: 600;
            padding: 2px 12px;
            border-radius: 50px;
            margin-right: 8px;
        }
        @media (max-width: 520px) {
            .post-item { flex-direction: column; }
            .post-thumb { width: 100%; height: 160px; }
        }

        /* ===== Empty State ===== */
        .empty-state { text-align: center; padding: 40px 20px; color: var(--text-light); }
        .empty-state i { font-size: 2.4rem; margin-bottom: 16px; color: var(--border); }
        .empty-state p { font-size: 1rem; color: var(--text-light); }

        /* ===== Article Content ===== */
        .article-content { font-size: 1.05rem; line-height: 1.9; color: var(--text-secondary); }
        .article-content h2 { font-size: 1.6rem; font-weight: 700; color: var(--text-primary); margin: 32px 0 16px; }
        .article-content h3 { font-size: 1.25rem; font-weight: 700; color: var(--text-primary); margin: 24px 0 12px; }
        .article-content p { margin-bottom: 1.2rem; }
        .article-content ul { list-style: disc; padding-left: 24px; margin-bottom: 1.2rem; }
        .article-content ul li { padding: 4px 0; color: var(--text-secondary); }
        .article-content img { border-radius: var(--radius-sm); margin: 24px 0; box-shadow: var(--shadow); }
        .article-content a { color: var(--primary); text-decoration: underline; }

        /* ===== Page Banner (inner) ===== */
        .page-banner {
            background: linear-gradient(135deg, var(--bg-dark) 0%, #0f2a44 100%);
            padding: 60px 0 50px;
            position: relative;
            overflow: hidden;
        }
        .page-banner::before {
            content: '';
            position: absolute;
            inset: 0;
            background: url('/assets/images/backpic/back-3.png') center center / cover no-repeat;
            opacity: 0.1;
            mix-blend-mode: overlay;
        }
        .page-banner .container { position: relative; z-index: 2; }
        .page-banner h1 { font-size: 2.4rem; font-weight: 800; color: var(--text-white); margin-bottom: 10px; }
        .page-banner p { font-size: 1.05rem; color: rgba(255,255,255,0.65); max-width: 600px; }
        @media (max-width: 768px) { .page-banner { padding: 40px 0 30px; } .page-banner h1 { font-size: 1.7rem; } }

        /* ===== Guide / Category Content ===== */
        .guide-card {
            display: flex;
            gap: 24px;
            background: var(--bg-white);
            border-radius: var(--radius);
            box-shadow: var(--shadow);
            padding: 28px;
            margin-bottom: 24px;
            border: 1px solid var(--border-light);
            transition: var(--transition);
            align-items: flex-start;
        }
        .guide-card:hover { transform: translateY(-3px); box-shadow: var(--shadow-lg); }
        .guide-num {
            width: 48px;
            height: 48px;
            flex-shrink: 0;
            background: var(--primary);
            color: #fff;
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            font-weight: 800;
            font-size: 1.1rem;
        }
        .guide-text h4 { font-size: 1.1rem; font-weight: 700; margin-bottom: 6px; }
        .guide-text p { font-size: 0.95rem; color: var(--text-secondary); margin-bottom: 0; }
        @media (max-width: 520px) { .guide-card { flex-direction: column; } }

        /* ===== Misc ===== */
        .text-center { text-align: center; }
        .mt-1 { margin-top: 1rem; }
        .mt-2 { margin-top: 2rem; }
        .mb-1 { margin-bottom: 1rem; }
        .mb-2 { margin-bottom: 2rem; }
        .gap-1 { gap: 1rem; }
        .flex-center { display: flex; align-items: center; justify-content: center; }
        .tag {
            display: inline-block;
            background: rgba(13,59,111,0.06);
            color: var(--primary);
            padding: 4px 16px;
            border-radius: 50px;
            font-size: 0.8rem;
            font-weight: 500;
        }
        .divider { height: 1px; background: var(--border-light); margin: 40px 0; }

        /* Foundation overrides */
        .grid-container { max-width: var(--max-width); padding-left: 24px; padding-right: 24px; }
        .grid-x { margin-left: 0; margin-right: 0; }
        .cell { padding: 0; }

/* roulang page: category1 */
/* ===== Design Variables ===== */
        :root {
            --primary: #1a3a5c;
            --primary-light: #2a5a8c;
            --primary-dark: #0f2440;
            --accent: #e8a838;
            --accent-hover: #d4942e;
            --accent-light: #f5d48a;
            --bg-light: #f6f8fb;
            --bg-white: #ffffff;
            --bg-dark: #0f1a2e;
            --text-dark: #1a2a3a;
            --text-body: #3a4a5a;
            --text-muted: #7a8a9a;
            --text-light: #f0f4f8;
            --border: #dce4ec;
            --border-light: #eaf0f6;
            --radius: 12px;
            --radius-sm: 8px;
            --radius-lg: 20px;
            --shadow-sm: 0 2px 8px rgba(0,0,0,0.04);
            --shadow-md: 0 6px 24px rgba(0,0,0,0.06);
            --shadow-lg: 0 16px 48px rgba(0,0,0,0.08);
            --shadow-xl: 0 24px 64px rgba(0,0,0,0.10);
            --font-sans: 'Segoe UI', 'PingFang SC', 'Microsoft YaHei', system-ui, -apple-system, sans-serif;
            --transition: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
            --spacing-section: 5rem;
        }

        /* ===== Reset & Base ===== */
        *, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
        html { scroll-behavior: smooth; font-size: 16px; }
        body {
            font-family: var(--font-sans);
            color: var(--text-body);
            background: var(--bg-light);
            line-height: 1.7;
            -webkit-font-smoothing: antialiased;
        }
        a { color: var(--primary-light); text-decoration: none; transition: var(--transition); }
        a:hover { color: var(--accent); }
        img { max-width: 100%; height: auto; display: block; border-radius: var(--radius-sm); }
        ul { list-style: none; }
        .container { max-width: 1200px; margin: 0 auto; padding: 0 1.5rem; }

        /* ===== Typography ===== */
        h1, h2, h3, h4, h5 { color: var(--text-dark); font-weight: 700; line-height: 1.3; }
        .section-title { font-size: 2.2rem; margin-bottom: 0.75rem; letter-spacing: -0.02em; }
        .section-subtitle { font-size: 1.15rem; color: var(--text-muted); max-width: 640px; margin: 0 auto 2.5rem; }
        .text-center { text-align: center; }

        /* ===== Header & Navigation ===== */
        .site-header {
            background: var(--bg-white);
            box-shadow: 0 2px 16px rgba(0,0,0,0.04);
            position: sticky;
            top: 0;
            z-index: 100;
            border-bottom: 1px solid var(--border-light);
        }
        .header-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding: 0.8rem 1.5rem;
            max-width: 1200px;
            margin: 0 auto;
        }
        .logo {
            display: flex;
            align-items: center;
            gap: 0.5rem;
            font-size: 1.4rem;
            font-weight: 700;
            color: var(--primary);
            text-decoration: none;
        }
        .logo i { color: var(--accent); font-size: 1.6rem; }
        .logo span { background: linear-gradient(135deg, var(--primary), var(--primary-light)); -webkit-background-clip: text; -webkit-text-fill-color: transparent; }
        .logo:hover { opacity: 0.9; }

        .nav-links {
            display: flex;
            align-items: center;
            gap: 0.25rem;
        }
        .nav-links a {
            padding: 0.5rem 1.1rem;
            border-radius: var(--radius-sm);
            font-weight: 500;
            color: var(--text-body);
            font-size: 0.95rem;
            transition: var(--transition);
            position: relative;
        }
        .nav-links a:hover { background: var(--bg-light); color: var(--primary); }
        .nav-links a.active { color: var(--primary); background: rgba(26,58,92,0.06); font-weight: 600; }
        .nav-links a.active::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 50%;
            transform: translateX(-50%);
            width: 24px;
            height: 3px;
            background: var(--accent);
            border-radius: 4px;
        }
        .nav-links a.nav-cta {
            background: linear-gradient(135deg, var(--accent), #d4942e);
            color: #fff;
            padding: 0.6rem 1.6rem;
            border-radius: 50px;
            font-weight: 600;
            box-shadow: 0 4px 14px rgba(232,168,56,0.35);
            display: flex;
            align-items: center;
            gap: 0.4rem;
            margin-left: 0.75rem;
        }
        .nav-links a.nav-cta:hover { transform: translateY(-2px); box-shadow: 0 8px 24px rgba(232,168,56,0.45); color: #fff; }
        .nav-links a.nav-cta i { font-size: 0.85rem; }

        .hamburger { display: none; flex-direction: column; gap: 5px; cursor: pointer; background: none; border: none; padding: 4px; }
        .hamburger span { width: 26px; height: 3px; background: var(--primary); border-radius: 4px; transition: var(--transition); }

        /* ===== Hero / Banner ===== */
        .category-banner {
            position: relative;
            background: linear-gradient(135deg, var(--primary-dark) 0%, var(--primary) 60%, var(--primary-light) 100%);
            padding: 5rem 0 4rem;
            overflow: hidden;
            min-height: 340px;
            display: flex;
            align-items: center;
        }
        .category-banner::before {
            content: '';
            position: absolute;
            inset: 0;
            background: url('/assets/images/backpic/back-2.png') center center / cover no-repeat;
            opacity: 0.12;
            mix-blend-mode: overlay;
        }
        .category-banner .container { position: relative; z-index: 2; }
        .category-banner h1 { font-size: 3rem; color: #fff; margin-bottom: 0.75rem; letter-spacing: -0.02em; }
        .category-banner p { font-size: 1.2rem; color: rgba(255,255,255,0.8); max-width: 640px; line-height: 1.7; }
        .category-banner .banner-tag {
            display: inline-block;
            background: rgba(232,168,56,0.2);
            color: var(--accent-light);
            padding: 0.3rem 1.2rem;
            border-radius: 50px;
            font-size: 0.85rem;
            font-weight: 600;
            margin-bottom: 1.25rem;
            border: 1px solid rgba(232,168,56,0.25);
        }

        /* ===== Breadcrumb ===== */
        .breadcrumb {
            background: transparent;
            padding: 1rem 0 0;
            margin-bottom: 0;
            font-size: 0.9rem;
            color: var(--text-muted);
        }
        .breadcrumb a { color: rgba(255,255,255,0.7); }
        .breadcrumb a:hover { color: var(--accent); }
        .breadcrumb span { color: rgba(255,255,255,0.5); }
        .breadcrumb .current { color: var(--accent-light); font-weight: 500; }

        /* ===== Section Common ===== */
        .section-block { padding: var(--spacing-section) 0; }
        .section-block.alt-bg { background: var(--bg-white); }
        .section-block.dark-bg { background: var(--bg-dark); color: var(--text-light); }
        .section-block.dark-bg h2,
        .section-block.dark-bg h3 { color: #fff; }
        .section-block.dark-bg .section-subtitle { color: rgba(255,255,255,0.65); }

        /* ===== Cards ===== */
        .card {
            background: var(--bg-white);
            border-radius: var(--radius);
            box-shadow: var(--shadow-sm);
            padding: 2rem;
            transition: var(--transition);
            border: 1px solid var(--border-light);
            height: 100%;
        }
        .card:hover { box-shadow: var(--shadow-lg); transform: translateY(-4px); border-color: transparent; }
        .card-icon { font-size: 2.2rem; color: var(--accent); margin-bottom: 1.2rem; }
        .card h3 { font-size: 1.25rem; margin-bottom: 0.6rem; }
        .card p { color: var(--text-muted); font-size: 0.95rem; line-height: 1.6; }
        .card .tag {
            display: inline-block;
            background: var(--bg-light);
            color: var(--primary-light);
            font-size: 0.75rem;
            padding: 0.2rem 0.8rem;
            border-radius: 50px;
            font-weight: 500;
            margin-bottom: 0.75rem;
        }

        /* ===== Grid Helpers ===== */
        .grid-2 { display: grid; grid-template-columns: repeat(2, 1fr); gap: 2rem; }
        .grid-3 { display: grid; grid-template-columns: repeat(3, 1fr); gap: 2rem; }
        .grid-4 { display: grid; grid-template-columns: repeat(4, 1fr); gap: 2rem; }

        /* ===== Steps ===== */
        .step-list { display: grid; grid-template-columns: repeat(auto-fit, minmax(240px, 1fr)); gap: 2rem; counter-reset: step; }
        .step-item {
            background: var(--bg-white);
            border-radius: var(--radius);
            padding: 2rem 2rem 2.2rem;
            box-shadow: var(--shadow-sm);
            border: 1px solid var(--border-light);
            position: relative;
            transition: var(--transition);
        }
        .step-item:hover { box-shadow: var(--shadow-md); transform: translateY(-3px); }
        .step-item::before {
            counter-increment: step;
            content: counter(step);
            position: absolute;
            top: 1.2rem;
            right: 1.5rem;
            font-size: 2.8rem;
            font-weight: 800;
            color: rgba(26,58,92,0.05);
            line-height: 1;
        }
        .step-item .step-num {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 44px;
            height: 44px;
            background: linear-gradient(135deg, var(--accent), #d4942e);
            color: #fff;
            border-radius: 50%;
            font-weight: 700;
            font-size: 1.1rem;
            margin-bottom: 1.25rem;
        }
        .step-item h4 { font-size: 1.15rem; margin-bottom: 0.4rem; }
        .step-item p { color: var(--text-muted); font-size: 0.92rem; }

        /* ===== FAQ ===== */
        .faq-list { max-width: 800px; margin: 0 auto; }
        .faq-item {
            background: var(--bg-white);
            border-radius: var(--radius-sm);
            margin-bottom: 1rem;
            padding: 1.25rem 1.8rem;
            border: 1px solid var(--border-light);
            transition: var(--transition);
            cursor: pointer;
        }
        .faq-item:hover { border-color: var(--accent-light); box-shadow: var(--shadow-sm); }
        .faq-item .faq-q { font-weight: 600; color: var(--text-dark); font-size: 1.05rem; display: flex; justify-content: space-between; align-items: center; }
        .faq-item .faq-q i { color: var(--accent); transition: var(--transition); font-size: 0.9rem; }
        .faq-item .faq-a { margin-top: 0.75rem; color: var(--text-muted); font-size: 0.95rem; line-height: 1.7; display: none; }
        .faq-item.active .faq-a { display: block; }
        .faq-item.active .faq-q i { transform: rotate(180deg); }

        /* ===== CTA ===== */
        .cta-section {
            background: linear-gradient(135deg, var(--primary-dark), var(--primary));
            padding: 4rem 0;
            text-align: center;
            position: relative;
            overflow: hidden;
        }
        .cta-section::before {
            content: '';
            position: absolute;
            inset: 0;
            background: url('/assets/images/backpic/back-3.png') center center / cover no-repeat;
            opacity: 0.08;
            mix-blend-mode: overlay;
        }
        .cta-section .container { position: relative; z-index: 2; }
        .cta-section h2 { color: #fff; font-size: 2.2rem; margin-bottom: 0.75rem; }
        .cta-section p { color: rgba(255,255,255,0.75); font-size: 1.1rem; max-width: 560px; margin: 0 auto 2rem; }
        .cta-btn {
            display: inline-flex;
            align-items: center;
            gap: 0.5rem;
            background: var(--accent);
            color: #fff;
            padding: 0.9rem 2.8rem;
            border-radius: 50px;
            font-weight: 700;
            font-size: 1.1rem;
            box-shadow: 0 8px 28px rgba(232,168,56,0.35);
            transition: var(--transition);
        }
        .cta-btn:hover { background: var(--accent-hover); transform: translateY(-3px); box-shadow: 0 12px 36px rgba(232,168,56,0.45); color: #fff; }

        /* ===== Stats ===== */
        .stats-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 2rem; }
        .stat-item { text-align: center; padding: 1.5rem; }
        .stat-item .stat-num { font-size: 2.8rem; font-weight: 800; color: var(--primary); line-height: 1.2; }
        .stat-item .stat-label { color: var(--text-muted); font-size: 0.95rem; margin-top: 0.3rem; }

        /* ===== Footer ===== */
        .site-footer {
            background: var(--bg-dark);
            color: rgba(255,255,255,0.7);
            padding: 3.5rem 0 0;
        }
        .footer-grid { display: grid; grid-template-columns: 2fr 1fr 1fr 1fr; gap: 2.5rem; padding-bottom: 2.5rem; border-bottom: 1px solid rgba(255,255,255,0.06); }
        .footer-brand .logo { color: #fff; font-size: 1.3rem; margin-bottom: 0.8rem; }
        .footer-brand .logo span { -webkit-text-fill-color: #fff; }
        .footer-brand p { font-size: 0.92rem; color: rgba(255,255,255,0.55); max-width: 320px; }
        .footer-col h4 { color: #fff; font-size: 1rem; margin-bottom: 1rem; font-weight: 600; }
        .footer-col a { display: block; color: rgba(255,255,255,0.55); font-size: 0.9rem; padding: 0.3rem 0; transition: var(--transition); }
        .footer-col a:hover { color: var(--accent); padding-left: 4px; }
        .footer-bottom { padding: 1.8rem 0; display: flex; justify-content: space-between; align-items: center; font-size: 0.85rem; color: rgba(255,255,255,0.4); flex-wrap: wrap; gap: 0.5rem; }
        .footer-bottom span { color: rgba(255,255,255,0.35); }

        /* ===== Buttons & Tags ===== */
        .btn-outline {
            display: inline-block;
            padding: 0.6rem 1.8rem;
            border: 2px solid var(--primary);
            color: var(--primary);
            border-radius: 50px;
            font-weight: 600;
            font-size: 0.9rem;
            transition: var(--transition);
        }
        .btn-outline:hover { background: var(--primary); color: #fff; }

        /* ===== Features strip ===== */
        .feature-strip {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
            gap: 1.5rem;
            margin-top: 2rem;
        }
        .feature-item {
            display: flex;
            align-items: center;
            gap: 1rem;
            background: var(--bg-white);
            padding: 1rem 1.4rem;
            border-radius: var(--radius-sm);
            border: 1px solid var(--border-light);
            transition: var(--transition);
        }
        .feature-item:hover { box-shadow: var(--shadow-sm); border-color: var(--accent-light); }
        .feature-item i { color: var(--accent); font-size: 1.3rem; width: 2rem; text-align: center; }
        .feature-item span { font-weight: 500; color: var(--text-dark); font-size: 0.95rem; }

        /* ===== Responsive ===== */
        @media (max-width: 1024px) {
            .grid-4 { grid-template-columns: repeat(2, 1fr); }
            .footer-grid { grid-template-columns: 1fr 1fr; }
        }
        @media (max-width: 768px) {
            .hamburger { display: flex; }
            .nav-links {
                position: absolute;
                top: 100%;
                left: 0;
                right: 0;
                background: var(--bg-white);
                flex-direction: column;
                padding: 1.2rem 1.5rem;
                box-shadow: 0 12px 32px rgba(0,0,0,0.08);
                border-top: 1px solid var(--border-light);
                display: none;
                gap: 0.4rem;
            }
            .nav-links.open { display: flex; }
            .nav-links a { width: 100%; padding: 0.7rem 1rem; }
            .nav-links a.nav-cta { margin-left: 0; justify-content: center; margin-top: 0.3rem; }
            .nav-links a.active::after { display: none; }

            .category-banner h1 { font-size: 2.2rem; }
            .category-banner p { font-size: 1rem; }
            .section-title { font-size: 1.8rem; }
            .grid-2, .grid-3, .grid-4 { grid-template-columns: 1fr; }
            .stats-grid { grid-template-columns: repeat(2, 1fr); gap: 1.2rem; }
            .footer-grid { grid-template-columns: 1fr; gap: 1.8rem; }
            .footer-bottom { flex-direction: column; text-align: center; }
            .step-list { grid-template-columns: 1fr; }
            .feature-strip { grid-template-columns: 1fr 1fr; }
        }
        @media (max-width: 520px) {
            .header-inner { padding: 0.6rem 1rem; }
            .logo { font-size: 1.15rem; }
            .category-banner { padding: 3rem 0 2.5rem; min-height: auto; }
            .category-banner h1 { font-size: 1.7rem; }
            .stats-grid { grid-template-columns: 1fr 1fr; gap: 0.8rem; }
            .stat-item .stat-num { font-size: 2rem; }
            .feature-strip { grid-template-columns: 1fr; }
            .cta-section h2 { font-size: 1.6rem; }
            .cta-btn { padding: 0.7rem 2rem; font-size: 1rem; }
        }

        /* ===== Utilities ===== */
        .mt-1 { margin-top: 1rem; }
        .mt-2 { margin-top: 2rem; }
        .mb-1 { margin-bottom: 1rem; }
        .mb-2 { margin-bottom: 2rem; }
        .gap-1 { gap: 1rem; }
        .flex-center { display: flex; align-items: center; justify-content: center; }
        .rounded-full { border-radius: 50px; }
        .shadow-hover { transition: var(--transition); }
        .shadow-hover:hover { box-shadow: var(--shadow-lg); transform: translateY(-3px); }

/* roulang page: article */
/* ===== Design Variables ===== */
        :root {
            --color-primary: #1e3a5f;
            --color-primary-light: #2a5298;
            --color-accent: #f5b342;
            --color-accent-hover: #e0a032;
            --color-bg: #ffffff;
            --color-bg-alt: #f5f8fc;
            --color-bg-dark: #0f1b2d;
            --color-text: #1e293b;
            --color-text-soft: #475569;
            --color-text-muted: #94a3b8;
            --color-border: #e2e8f0;
            --color-border-light: #f1f5f9;
            --color-white: #ffffff;
            --color-success: #10b981;
            --color-error: #ef4444;
            --radius-sm: 6px;
            --radius-md: 12px;
            --radius-lg: 20px;
            --radius-xl: 28px;
            --shadow-sm: 0 1px 3px rgba(0,0,0,0.06), 0 1px 2px rgba(0,0,0,0.04);
            --shadow-md: 0 4px 16px rgba(0,0,0,0.07), 0 2px 8px rgba(0,0,0,0.04);
            --shadow-lg: 0 12px 40px rgba(0,0,0,0.10), 0 4px 16px rgba(0,0,0,0.06);
            --shadow-xl: 0 24px 60px rgba(0,0,0,0.14);
            --transition: 0.25s cubic-bezier(0.4,0,0.2,1);
            --font-sans: 'Segoe UI', system-ui, -apple-system, 'PingFang SC', 'Microsoft YaHei', sans-serif;
            --container-max: 1200px;
            --header-height: 70px;
        }

        /* ===== 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-sans);
            font-size: 16px;
            line-height: 1.7;
            color: var(--color-text);
            background: var(--color-bg);
        }
        a { color: var(--color-primary-light); text-decoration: none; transition: color var(--transition); }
        a:hover { color: var(--color-accent); }
        img { max-width: 100%; height: auto; display: block; border-radius: var(--radius-sm); }
        ul, ol { list-style: none; }
        button, input, textarea { font-family: inherit; font-size: inherit; border: none; outline: none; }
        button { cursor: pointer; background: none; }
        h1, h2, h3, h4, h5, h6 { line-height: 1.3; color: var(--color-text); font-weight: 700; }
        h1 { font-size: 2.4rem; }
        h2 { font-size: 2rem; }
        h3 { font-size: 1.4rem; }
        h4 { font-size: 1.15rem; }
        p { margin-bottom: 1rem; color: var(--color-text-soft); }
        .container { max-width: var(--container-max); margin: 0 auto; padding: 0 20px; }
        .row { max-width: var(--container-max); margin: 0 auto; }
        .section { padding: 70px 0; }
        .section-alt { background: var(--color-bg-alt); }
        .section-dark { background: var(--color-bg-dark); color: var(--color-white); }
        .section-dark h2, .section-dark h3, .section-dark p { color: var(--color-white); }
        .section-title {
            font-size: 2rem;
            margin-bottom: 0.5rem;
            text-align: center;
            font-weight: 800;
        }
        .section-subtitle {
            text-align: center;
            color: var(--color-text-muted);
            font-size: 1.1rem;
            max-width: 640px;
            margin: 0 auto 48px auto;
        }
        .section-dark .section-subtitle { color: rgba(255,255,255,0.7); }
        .text-center { text-align: center; }

        /* ===== Buttons ===== */
        .btn {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 12px 30px;
            border-radius: 50px;
            font-weight: 600;
            font-size: 0.95rem;
            transition: all var(--transition);
            border: 2px solid transparent;
            background: var(--color-primary);
            color: var(--color-white);
            box-shadow: var(--shadow-sm);
        }
        .btn:hover {
            transform: translateY(-2px);
            box-shadow: var(--shadow-md);
            background: var(--color-primary-light);
            color: var(--color-white);
        }
        .btn:focus-visible { outline: 3px solid var(--color-accent); outline-offset: 2px; }
        .btn-accent { background: var(--color-accent); color: var(--color-bg-dark); border-color: var(--color-accent); }
        .btn-accent:hover { background: var(--color-accent-hover); color: var(--color-bg-dark); }
        .btn-outline { background: transparent; border-color: var(--color-primary); color: var(--color-primary); }
        .btn-outline:hover { background: var(--color-primary); color: var(--color-white); }
        .btn-white { background: var(--color-white); color: var(--color-primary); }
        .btn-white:hover { background: var(--color-bg-alt); color: var(--color-primary); }
        .btn-sm { padding: 8px 20px; font-size: 0.85rem; }

        /* ===== Header & Navigation ===== */
        .site-header {
            background: var(--color-white);
            border-bottom: 1px solid var(--color-border);
            height: var(--header-height);
            display: flex;
            align-items: center;
            position: sticky;
            top: 0;
            z-index: 100;
            box-shadow: 0 1px 4px rgba(0,0,0,0.03);
        }
        .header-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 100%;
            width: 100%;
        }
        .logo {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 1.4rem;
            font-weight: 800;
            color: var(--color-primary);
            letter-spacing: -0.3px;
        }
        .logo i { color: var(--color-accent); font-size: 1.6rem; }
        .logo:hover { color: var(--color-primary); opacity: 0.9; }
        .nav-links { display: flex; align-items: center; gap: 6px; }
        .nav-links a {
            padding: 8px 18px;
            border-radius: 50px;
            font-weight: 500;
            font-size: 0.92rem;
            color: var(--color-text-soft);
            transition: all var(--transition);
            position: relative;
        }
        .nav-links a:hover { color: var(--color-primary); background: var(--color-bg-alt); }
        .nav-links a.active { color: var(--color-primary); background: rgba(30,58,95,0.08); font-weight: 600; }
        .nav-links a.nav-cta {
            background: var(--color-accent);
            color: var(--color-bg-dark);
            font-weight: 700;
            padding: 10px 26px;
            box-shadow: var(--shadow-sm);
            border: 2px solid var(--color-accent);
        }
        .nav-links a.nav-cta:hover {
            background: var(--color-accent-hover);
            transform: translateY(-1px);
            box-shadow: var(--shadow-md);
            color: var(--color-bg-dark);
        }
        .menu-toggle { display: none; font-size: 1.6rem; color: var(--color-primary); padding: 6px 10px; border-radius: var(--radius-sm); }

        /* ===== Article Banner ===== */
        .article-banner {
            position: relative;
            min-height: 360px;
            display: flex;
            align-items: center;
            justify-content: center;
            background-size: cover;
            background-position: center;
            background-repeat: no-repeat;
        }
        .article-banner .overlay {
            position: absolute;
            inset: 0;
            background: linear-gradient(135deg, rgba(15,27,45,0.82) 0%, rgba(30,58,95,0.70) 100%);
            z-index: 1;
        }
        .article-banner .banner-content {
            position: relative;
            z-index: 2;
            text-align: center;
            padding: 60px 20px;
            max-width: 800px;
            margin: 0 auto;
        }
        .article-banner h1 {
            color: var(--color-white);
            font-size: 2.6rem;
            font-weight: 800;
            margin-bottom: 16px;
            text-shadow: 0 2px 12px rgba(0,0,0,0.2);
            line-height: 1.25;
        }
        .article-banner .article-meta {
            display: flex;
            justify-content: center;
            flex-wrap: wrap;
            gap: 20px;
            color: rgba(255,255,255,0.85);
            font-size: 0.95rem;
        }
        .article-banner .article-meta span { display: inline-flex; align-items: center; gap: 6px; }
        .article-banner .article-meta i { color: var(--color-accent); }
        .article-banner .category-tag {
            display: inline-block;
            background: var(--color-accent);
            color: var(--color-bg-dark);
            padding: 4px 16px;
            border-radius: 50px;
            font-size: 0.8rem;
            font-weight: 700;
            margin-bottom: 14px;
            text-transform: uppercase;
            letter-spacing: 0.5px;
        }

        /* ===== Breadcrumb ===== */
        .breadcrumb-wrap {
            padding: 18px 0 6px 0;
            font-size: 0.88rem;
            color: var(--color-text-muted);
        }
        .breadcrumb-wrap a { color: var(--color-text-soft); }
        .breadcrumb-wrap a:hover { color: var(--color-primary); }
        .breadcrumb-wrap span { color: var(--color-text); font-weight: 500; }

        /* ===== Article Content ===== */
        .article-main { padding: 40px 0 60px 0; }
        .content-body {
            font-size: 1.05rem;
            line-height: 1.9;
            color: var(--color-text);
            background: var(--color-white);
            border-radius: var(--radius-md);
            padding: 40px;
            box-shadow: var(--shadow-sm);
            border: 1px solid var(--color-border-light);
        }
        .content-body h2, .content-body h3, .content-body h4 {
            margin-top: 1.8em;
            margin-bottom: 0.6em;
            color: var(--color-primary);
        }
        .content-body h2 { font-size: 1.6rem; }
        .content-body h3 { font-size: 1.3rem; }
        .content-body p { margin-bottom: 1.2em; color: var(--color-text-soft); }
        .content-body ul, .content-body ol { margin-bottom: 1.2em; padding-left: 1.6em; list-style: disc; }
        .content-body ol { list-style: decimal; }
        .content-body li { margin-bottom: 0.4em; color: var(--color-text-soft); }
        .content-body img { border-radius: var(--radius-md); margin: 1.5em 0; box-shadow: var(--shadow-sm); }
        .content-body blockquote {
            border-left: 4px solid var(--color-accent);
            background: var(--color-bg-alt);
            padding: 16px 24px;
            margin: 1.5em 0;
            border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
            color: var(--color-text-soft);
            font-style: italic;
        }
        .content-body a { color: var(--color-primary-light); text-decoration: underline; text-underline-offset: 2px; }
        .content-body a:hover { color: var(--color-accent); }
        .content-body code {
            background: var(--color-bg-alt);
            padding: 2px 8px;
            border-radius: 4px;
            font-size: 0.9em;
            color: var(--color-primary);
        }
        .content-not-found {
            text-align: center;
            padding: 80px 20px;
        }
        .content-not-found i { font-size: 4rem; color: var(--color-text-muted); margin-bottom: 24px; }
        .content-not-found h2 { font-size: 2rem; margin-bottom: 12px; }
        .content-not-found p { color: var(--color-text-muted); margin-bottom: 28px; }
        .content-not-found .btn { margin: 0 auto; }

        /* ===== Related Posts ===== */
        .related-posts { background: var(--color-bg-alt); }
        .related-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 28px;
        }
        .related-card {
            background: var(--color-white);
            border-radius: var(--radius-md);
            overflow: hidden;
            box-shadow: var(--shadow-sm);
            transition: all var(--transition);
            border: 1px solid var(--color-border-light);
            display: flex;
            flex-direction: column;
        }
        .related-card:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow-lg);
        }
        .related-card .card-img {
            height: 200px;
            background-size: cover;
            background-position: center;
            position: relative;
        }
        .related-card .card-img .card-cat {
            position: absolute;
            top: 14px;
            left: 14px;
            background: var(--color-accent);
            color: var(--color-bg-dark);
            padding: 3px 14px;
            border-radius: 50px;
            font-size: 0.75rem;
            font-weight: 700;
        }
        .related-card .card-body { padding: 22px; flex: 1; display: flex; flex-direction: column; }
        .related-card .card-body h3 { font-size: 1.1rem; margin-bottom: 8px; font-weight: 700; }
        .related-card .card-body h3 a { color: var(--color-text); }
        .related-card .card-body h3 a:hover { color: var(--color-primary); }
        .related-card .card-body p { font-size: 0.9rem; color: var(--color-text-muted); margin-bottom: 16px; flex: 1; }
        .related-card .card-body .card-meta { font-size: 0.8rem; color: var(--color-text-muted); display: flex; align-items: center; gap: 12px; }
        .related-card .card-body .card-meta i { color: var(--color-accent); }
        .related-card .card-body .read-more {
            font-weight: 600;
            font-size: 0.85rem;
            color: var(--color-primary);
            display: inline-flex;
            align-items: center;
            gap: 4px;
            margin-top: 8px;
        }
        .related-card .card-body .read-more:hover { color: var(--color-accent); gap: 8px; }

        /* ===== CTA Section ===== */
        .cta-section {
            background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-light) 100%);
            padding: 70px 0;
            text-align: center;
        }
        .cta-section h2 { color: var(--color-white); font-size: 2rem; margin-bottom: 12px; }
        .cta-section p { color: rgba(255,255,255,0.85); font-size: 1.1rem; max-width: 600px; margin: 0 auto 32px auto; }
        .cta-section .btn { background: var(--color-accent); color: var(--color-bg-dark); font-weight: 700; }
        .cta-section .btn:hover { background: var(--color-accent-hover); transform: translateY(-2px); box-shadow: 0 8px 30px rgba(0,0,0,0.25); }

        /* ===== Footer ===== */
        .site-footer {
            background: var(--color-bg-dark);
            color: rgba(255,255,255,0.75);
            padding: 60px 0 0 0;
            font-size: 0.92rem;
        }
        .site-footer .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr 1fr;
            gap: 40px;
            margin-bottom: 40px;
        }
        .site-footer .footer-brand .logo { color: var(--color-white); font-size: 1.3rem; margin-bottom: 14px; display: inline-flex; }
        .site-footer .footer-brand .logo i { color: var(--color-accent); }
        .site-footer .footer-brand p { color: rgba(255,255,255,0.6); font-size: 0.9rem; max-width: 320px; }
        .site-footer .footer-col h4 { color: var(--color-white); font-size: 1rem; margin-bottom: 18px; font-weight: 700; }
        .site-footer .footer-col a {
            display: block;
            color: rgba(255,255,255,0.6);
            margin-bottom: 10px;
            transition: color var(--transition);
            font-size: 0.9rem;
        }
        .site-footer .footer-col a:hover { color: var(--color-accent); }
        .site-footer .footer-col a i { width: 20px; margin-right: 6px; color: var(--color-accent); }
        .site-footer .footer-bottom {
            border-top: 1px solid rgba(255,255,255,0.08);
            padding: 24px 0;
            display: flex;
            justify-content: space-between;
            flex-wrap: wrap;
            gap: 12px;
            font-size: 0.82rem;
            color: rgba(255,255,255,0.4);
        }

        /* ===== Back to Top ===== */
        .back-top {
            position: fixed;
            bottom: 30px;
            right: 30px;
            width: 48px;
            height: 48px;
            border-radius: 50%;
            background: var(--color-primary);
            color: var(--color-white);
            font-size: 1.2rem;
            display: flex;
            align-items: center;
            justify-content: center;
            box-shadow: var(--shadow-md);
            z-index: 99;
            transition: all var(--transition);
            opacity: 0;
            pointer-events: none;
        }
        .back-top.visible { opacity: 1; pointer-events: auto; }
        .back-top:hover { background: var(--color-accent); color: var(--color-bg-dark); transform: translateY(-4px); }

        /* ===== Responsive ===== */
        @media (max-width: 1024px) {
            .site-footer .footer-grid { grid-template-columns: 1fr 1fr; gap: 30px; }
            .related-grid { grid-template-columns: repeat(2, 1fr); }
        }
        @media (max-width: 768px) {
            .site-header { height: 62px; }
            .nav-links { display: none; flex-direction: column; position: absolute; top: 62px; left: 0; right: 0; background: var(--color-white); border-bottom: 1px solid var(--color-border); box-shadow: var(--shadow-md); padding: 16px 20px; gap: 4px; border-radius: 0 0 var(--radius-md) var(--radius-md); }
            .nav-links.open { display: flex; }
            .nav-links a { padding: 12px 16px; width: 100%; border-radius: var(--radius-sm); }
            .nav-links a.nav-cta { text-align: center; margin-top: 6px; }
            .menu-toggle { display: block; }
            .article-banner { min-height: 280px; }
            .article-banner h1 { font-size: 1.8rem; }
            .article-banner .article-meta { gap: 12px; font-size: 0.85rem; }
            .content-body { padding: 24px; font-size: 0.98rem; }
            .section { padding: 50px 0; }
            .section-title { font-size: 1.5rem; }
            .related-grid { grid-template-columns: 1fr; gap: 20px; }
            .site-footer .footer-grid { grid-template-columns: 1fr; gap: 24px; }
            .site-footer .footer-bottom { flex-direction: column; align-items: center; text-align: center; }
            .cta-section h2 { font-size: 1.5rem; }
            .article-banner h1 { font-size: 1.6rem; }
            .back-top { bottom: 20px; right: 20px; width: 42px; height: 42px; font-size: 1rem; }
        }
        @media (max-width: 520px) {
            .container { padding: 0 14px; }
            .article-banner { min-height: 220px; }
            .article-banner h1 { font-size: 1.3rem; }
            .content-body { padding: 16px; font-size: 0.92rem; border-radius: var(--radius-sm); }
            .section { padding: 36px 0; }
            .section-title { font-size: 1.25rem; }
            .btn { padding: 10px 22px; font-size: 0.85rem; }
            .breadcrumb-wrap { font-size: 0.8rem; }
            .related-card .card-img { height: 160px; }
            .site-footer { padding: 40px 0 0 0; }
        }

        /* ===== Utility ===== */
        .mt-1 { margin-top: 1rem; }
        .mt-2 { margin-top: 2rem; }
        .mb-1 { margin-bottom: 1rem; }
        .mb-2 { margin-bottom: 2rem; }
        .gap-1 { gap: 1rem; }
        .flex-center { display: flex; align-items: center; justify-content: center; }
        .text-muted { color: var(--color-text-muted); }
        .text-accent { color: var(--color-accent); }