/* roulang page: index */
/* ===== Design Variables ===== */
        :root {
            --primary: #1a3a5c;
            --primary-light: #2a5a8c;
            --primary-dark: #0f2440;
            --accent: #e8a838;
            --accent-light: #f0c060;
            --accent-dark: #c88a20;
            --bg-light: #f8f9fb;
            --bg-white: #ffffff;
            --bg-dark: #0f2440;
            --text-dark: #1a1a2e;
            --text-body: #3d4a5c;
            --text-light: #7a8a9e;
            --text-white: #f0f4fa;
            --border: #e2e8f0;
            --border-light: #f0f2f5;
            --radius: 12px;
            --radius-sm: 8px;
            --radius-lg: 20px;
            --shadow-sm: 0 2px 8px rgba(26, 58, 92, 0.06);
            --shadow-md: 0 8px 30px rgba(26, 58, 92, 0.10);
            --shadow-lg: 0 16px 48px rgba(26, 58, 92, 0.14);
            --shadow-hover: 0 12px 40px rgba(26, 58, 92, 0.16);
            --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
            --font-sans: 'Segoe UI', 'PingFang SC', 'Microsoft YaHei', system-ui, -apple-system, sans-serif;
            --container-max: 1200px;
            --nav-height: 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-body);
            background: var(--bg-light);
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
        }
        a { color: var(--primary-light); text-decoration: none; transition: var(--transition); }
        a:hover, a:focus { color: var(--primary); text-decoration: none; }
        a:focus-visible { outline: 3px solid var(--accent); outline-offset: 2px; }
        img { max-width: 100%; height: auto; display: block; }
        button, .button { cursor: pointer; font-family: inherit; }
        ul, ol { list-style: none; }
        h1, h2, h3, h4, h5, h6 { font-weight: 700; line-height: 1.25; color: var(--text-dark); }
        h1 { font-size: 2.6rem; }
        h2 { font-size: 2.0rem; }
        h3 { font-size: 1.5rem; }
        h4 { font-size: 1.2rem; }
        p { margin-bottom: 1rem; }
        .container { max-width: var(--container-max); margin: 0 auto; padding: 0 20px; }

        /* ===== Skip Link ===== */
        .skip-link { position: absolute; top: -100px; left: 20px; background: var(--primary); color: #fff; padding: 12px 24px; border-radius: 0 0 var(--radius-sm) var(--radius-sm); z-index: 10000; transition: top 0.3s; }
        .skip-link:focus { top: 0; }

        /* ===== Header / Nav ===== */
        .site-header {
            position: fixed; top: 0; left: 0; right: 0; z-index: 1000;
            height: var(--nav-height);
            background: rgba(255,255,255,0.96);
            backdrop-filter: blur(12px);
            -webkit-backdrop-filter: blur(12px);
            border-bottom: 1px solid var(--border);
            box-shadow: 0 1px 4px rgba(26,58,92,0.04);
            transition: var(--transition);
        }
        .site-header.scrolled { box-shadow: 0 2px 16px rgba(26,58,92,0.08); }
        .header-inner {
            max-width: var(--container-max);
            margin: 0 auto;
            padding: 0 20px;
            height: 100%;
            display: flex;
            align-items: center;
            justify-content: space-between;
            position: relative;
        }
        .logo-wrap {
            position: absolute;
            left: 50%;
            transform: translateX(-50%);
            text-align: center;
        }
        .logo-link {
            font-size: 1.5rem;
            font-weight: 800;
            color: var(--primary-dark);
            letter-spacing: 1px;
            display: inline-flex;
            align-items: center;
            gap: 8px;
            transition: var(--transition);
        }
        .logo-link:hover { color: var(--primary-light); }
        .logo-link .logo-icon {
            display: inline-block;
            width: 32px; height: 32px;
            background: var(--accent);
            border-radius: 8px;
            color: var(--primary-dark);
            font-size: 1.1rem;
            font-weight: 900;
            line-height: 32px;
            text-align: center;
        }
        .nav-left, .nav-right { display: flex; align-items: center; gap: 6px; }
        .nav-left .nav-link, .nav-right .nav-link {
            padding: 8px 18px;
            font-size: 0.95rem;
            font-weight: 500;
            color: var(--text-body);
            border-radius: var(--radius-sm);
            transition: var(--transition);
            white-space: nowrap;
        }
        .nav-left .nav-link:hover, .nav-right .nav-link:hover,
        .nav-left .nav-link:focus, .nav-right .nav-link:focus { color: var(--primary); background: rgba(26,58,92,0.06); }
        .nav-left .nav-link.active, .nav-right .nav-link.active {
            color: var(--primary-dark);
            background: rgba(232,168,56,0.12);
            font-weight: 600;
        }
        .nav-toggle { display: none; background: none; border: none; font-size: 1.6rem; color: var(--text-dark); padding: 6px 10px; border-radius: 6px; transition: var(--transition); }
        .nav-toggle:hover { background: rgba(26,58,92,0.06); }

        /* Mobile Nav Drawer */
        .mobile-drawer {
            display: none;
            position: fixed; top: var(--nav-height); left: 0; right: 0; bottom: 0;
            background: rgba(255,255,255,0.98);
            backdrop-filter: blur(16px);
            -webkit-backdrop-filter: blur(16px);
            z-index: 999;
            padding: 32px 24px;
            overflow-y: auto;
            opacity: 0;
            transform: translateY(-12px);
            transition: opacity 0.35s ease, transform 0.35s ease;
        }
        .mobile-drawer.open { display: block; opacity: 1; transform: translateY(0); }
        .mobile-drawer .nav-link {
            display: block;
            padding: 16px 20px;
            font-size: 1.15rem;
            font-weight: 500;
            color: var(--text-body);
            border-radius: var(--radius-sm);
            border-bottom: 1px solid var(--border-light);
            transition: var(--transition);
        }
        .mobile-drawer .nav-link:hover { background: rgba(26,58,92,0.04); color: var(--primary); }
        .mobile-drawer .nav-link.active { color: var(--primary-dark); font-weight: 700; background: rgba(232,168,56,0.10); }

        /* ===== Hero ===== */
        .hero-section {
            padding: 140px 0 80px;
            position: relative;
            background: var(--primary-dark);
            background-image: url('/assets/images/backpic/back-1.png');
            background-size: cover;
            background-position: center center;
            background-repeat: no-repeat;
            min-height: 560px;
            display: flex;
            align-items: center;
            overflow: hidden;
        }
        .hero-section::before {
            content: '';
            position: absolute; inset: 0;
            background: linear-gradient(135deg, rgba(15,36,64,0.88) 0%, rgba(26,58,92,0.72) 60%, rgba(15,36,64,0.60) 100%);
            z-index: 1;
        }
        .hero-section .container { position: relative; z-index: 2; width: 100%; }
        .hero-content { max-width: 720px; }
        .hero-badge {
            display: inline-block;
            padding: 6px 18px;
            background: rgba(232,168,56,0.20);
            color: var(--accent-light);
            border-radius: 40px;
            font-size: 0.85rem;
            font-weight: 600;
            letter-spacing: 0.5px;
            margin-bottom: 20px;
            border: 1px solid rgba(232,168,56,0.25);
        }
        .hero-title {
            font-size: 3.0rem;
            font-weight: 800;
            color: var(--text-white);
            line-height: 1.15;
            margin-bottom: 16px;
        }
        .hero-title span { color: var(--accent); }
        .hero-desc {
            font-size: 1.2rem;
            color: rgba(240,244,250,0.85);
            line-height: 1.7;
            margin-bottom: 32px;
            max-width: 600px;
        }
        .hero-actions { display: flex; flex-wrap: wrap; gap: 16px; align-items: center; }
        .btn-primary {
            display: inline-flex; align-items: center; gap: 10px;
            padding: 14px 36px;
            background: var(--accent);
            color: var(--primary-dark);
            font-weight: 700;
            font-size: 1.05rem;
            border-radius: 50px;
            border: none;
            box-shadow: 0 4px 16px rgba(232,168,56,0.35);
            transition: var(--transition);
        }
        .btn-primary:hover, .btn-primary:focus {
            background: var(--accent-light);
            color: var(--primary-dark);
            box-shadow: 0 8px 28px rgba(232,168,56,0.45);
            transform: translateY(-2px);
        }
        .btn-outline-light {
            display: inline-flex; align-items: center; gap: 10px;
            padding: 14px 32px;
            background: transparent;
            color: var(--text-white);
            font-weight: 600;
            font-size: 1.0rem;
            border-radius: 50px;
            border: 2px solid rgba(240,244,250,0.4);
            transition: var(--transition);
        }
        .btn-outline-light:hover, .btn-outline-light:focus {
            background: rgba(240,244,250,0.10);
            border-color: var(--accent);
            color: var(--accent);
            transform: translateY(-2px);
        }
        .hero-stats {
            display: flex; gap: 40px; margin-top: 48px;
            padding-top: 32px;
            border-top: 1px solid rgba(240,244,250,0.15);
        }
        .hero-stat-item { text-align: left; }
        .hero-stat-num {
            font-size: 2.0rem;
            font-weight: 800;
            color: var(--accent);
            line-height: 1.2;
        }
        .hero-stat-label {
            font-size: 0.9rem;
            color: rgba(240,244,250,0.7);
        }

        /* ===== Section Common ===== */
        .section { padding: 80px 0; }
        .section-alt { background: var(--bg-white); }
        .section-dark { background: var(--bg-dark); color: var(--text-white); }
        .section-header { text-align: center; max-width: 680px; margin: 0 auto 48px; }
        .section-header h2 { margin-bottom: 12px; }
        .section-header p { color: var(--text-light); font-size: 1.1rem; }
        .section-dark .section-header h2 { color: var(--text-white); }
        .section-dark .section-header p { color: rgba(240,244,250,0.7); }
        .section-tag {
            display: inline-block;
            padding: 4px 14px;
            background: rgba(232,168,56,0.12);
            color: var(--accent-dark);
            border-radius: 40px;
            font-size: 0.8rem;
            font-weight: 600;
            letter-spacing: 0.4px;
            margin-bottom: 12px;
        }
        .section-dark .section-tag { background: rgba(232,168,56,0.18); color: var(--accent-light); }

        /* ===== Cards Grid ===== */
        .card-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 28px; }
        .card-item {
            background: var(--bg-white);
            border-radius: var(--radius);
            box-shadow: var(--shadow-sm);
            border: 1px solid var(--border-light);
            overflow: hidden;
            transition: var(--transition);
        }
        .card-item:hover { box-shadow: var(--shadow-hover); transform: translateY(-4px); }
        .card-img { width: 100%; height: 200px; object-fit: cover; display: block; background: #eef2f7; }
        .card-body { padding: 24px; }
        .card-body h3 { font-size: 1.2rem; margin-bottom: 8px; }
        .card-body p { font-size: 0.95rem; color: var(--text-light); margin-bottom: 16px; }
        .card-meta { display: flex; align-items: center; gap: 12px; font-size: 0.85rem; color: var(--text-light); }
        .card-meta .badge {
            display: inline-block;
            padding: 2px 12px;
            background: rgba(26,58,92,0.06);
            border-radius: 40px;
            font-size: 0.75rem;
            font-weight: 600;
            color: var(--primary);
        }
        .card-link { font-weight: 600; color: var(--primary); display: inline-flex; align-items: center; gap: 6px; }
        .card-link:hover { color: var(--accent-dark); gap: 10px; }

        /* ===== Feature / Service ===== */
        .feature-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 28px; }
        .feature-card {
            background: var(--bg-white);
            border-radius: var(--radius);
            padding: 32px 24px;
            text-align: center;
            box-shadow: var(--shadow-sm);
            border: 1px solid var(--border-light);
            transition: var(--transition);
        }
        .feature-card:hover { box-shadow: var(--shadow-hover); transform: translateY(-3px); }
        .feature-icon {
            width: 60px; height: 60px;
            margin: 0 auto 18px;
            background: rgba(232,168,56,0.10);
            border-radius: 16px;
            display: flex; align-items: center; justify-content: center;
            font-size: 1.6rem; color: var(--accent-dark);
            transition: var(--transition);
        }
        .feature-card:hover .feature-icon { background: rgba(232,168,56,0.18); }
        .feature-card h3 { font-size: 1.1rem; margin-bottom: 8px; }
        .feature-card p { font-size: 0.9rem; color: var(--text-light); margin-bottom: 0; }

        /* ===== Guide Steps ===== */
        .steps-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 24px; }
        .step-card {
            background: var(--bg-white);
            border-radius: var(--radius);
            padding: 32px 20px;
            text-align: center;
            box-shadow: var(--shadow-sm);
            border: 1px solid var(--border-light);
            position: relative;
            transition: var(--transition);
        }
        .step-card:hover { box-shadow: var(--shadow-hover); transform: translateY(-3px); }
        .step-num {
            width: 44px; height: 44px;
            margin: 0 auto 16px;
            background: var(--primary);
            color: #fff;
            border-radius: 50%;
            display: flex; align-items: center; justify-content: center;
            font-weight: 800; font-size: 1.2rem;
        }
        .step-card h3 { font-size: 1.05rem; margin-bottom: 8px; }
        .step-card p { font-size: 0.9rem; color: var(--text-light); margin-bottom: 0; }

        /* ===== Category Cards ===== */
        .cat-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 28px; }
        .cat-card {
            background: var(--bg-white);
            border-radius: var(--radius);
            overflow: hidden;
            box-shadow: var(--shadow-sm);
            border: 1px solid var(--border-light);
            display: flex; flex-direction: row;
            transition: var(--transition);
        }
        .cat-card:hover { box-shadow: var(--shadow-hover); transform: translateY(-3px); }
        .cat-card-img {
            width: 200px; min-height: 180px;
            object-fit: cover;
            flex-shrink: 0;
            background: #eef2f7;
        }
        .cat-card-body { padding: 24px; display: flex; flex-direction: column; justify-content: center; }
        .cat-card-body h3 { font-size: 1.15rem; margin-bottom: 8px; }
        .cat-card-body p { font-size: 0.9rem; color: var(--text-light); margin-bottom: 16px; flex-grow: 1; }
        .cat-card-body .btn-small {
            align-self: flex-start;
            padding: 8px 20px;
            background: var(--primary);
            color: #fff;
            border-radius: 50px;
            font-size: 0.85rem;
            font-weight: 600;
            border: none;
            transition: var(--transition);
        }
        .cat-card-body .btn-small:hover { background: var(--primary-light); }

        /* ===== Latest Posts (CMS) ===== */
        .post-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 28px; }
        .post-card { background: var(--bg-white); border-radius: var(--radius); box-shadow: var(--shadow-sm); border: 1px solid var(--border-light); overflow: hidden; transition: var(--transition); }
        .post-card:hover { box-shadow: var(--shadow-hover); transform: translateY(-4px); }
        .post-card-img { width: 100%; height: 180px; object-fit: cover; background: #eef2f7; }
        .post-card-body { padding: 20px 24px 24px; }
        .post-card-body h3 { font-size: 1.05rem; margin-bottom: 8px; }
        .post-card-body h3 a { color: var(--text-dark); }
        .post-card-body h3 a:hover { color: var(--primary); }
        .post-card-body p { font-size: 0.9rem; color: var(--text-light); margin-bottom: 12px; }
        .post-meta { display: flex; align-items: center; gap: 14px; font-size: 0.8rem; color: var(--text-light); }
        .post-meta .badge-cat {
            padding: 2px 12px;
            background: rgba(232,168,56,0.10);
            color: var(--accent-dark);
            border-radius: 40px;
            font-weight: 600;
            font-size: 0.7rem;
        }

        /* ===== FAQ ===== */
        .faq-list { max-width: 800px; margin: 0 auto; }
        .faq-item {
            background: var(--bg-white);
            border-radius: var(--radius-sm);
            margin-bottom: 12px;
            border: 1px solid var(--border);
            overflow: hidden;
            transition: var(--transition);
        }
        .faq-item:hover { border-color: var(--accent); }
        .faq-question {
            padding: 18px 24px;
            font-weight: 600;
            font-size: 1.0rem;
            color: var(--text-dark);
            cursor: pointer;
            display: flex;
            justify-content: space-between;
            align-items: center;
            background: none;
            border: none;
            width: 100%;
            text-align: left;
            font-family: inherit;
            transition: var(--transition);
        }
        .faq-question:hover { color: var(--primary); }
        .faq-question .faq-icon { font-size: 1.2rem; color: var(--accent); transition: var(--transition); }
        .faq-item.open .faq-question .faq-icon { transform: rotate(180deg); }
        .faq-answer {
            padding: 0 24px 18px;
            font-size: 0.95rem;
            color: var(--text-body);
            line-height: 1.7;
            display: none;
        }
        .faq-item.open .faq-answer { display: block; }

        /* ===== CTA ===== */
        .cta-section {
            padding: 80px 0;
            background: var(--primary-dark);
            background-image: url('/assets/images/backpic/back-2.png');
            background-size: cover;
            background-position: center;
            position: relative;
        }
        .cta-section::before {
            content: '';
            position: absolute; inset: 0;
            background: linear-gradient(135deg, rgba(15,36,64,0.90) 0%, rgba(26,58,92,0.75) 100%);
            z-index: 1;
        }
        .cta-section .container { position: relative; z-index: 2; }
        .cta-content { text-align: center; max-width: 640px; margin: 0 auto; }
        .cta-content h2 { font-size: 2.2rem; color: var(--text-white); margin-bottom: 12px; }
        .cta-content p { font-size: 1.1rem; color: rgba(240,244,250,0.8); margin-bottom: 32px; }
        .cta-actions { display: flex; flex-wrap: wrap; gap: 16px; justify-content: center; }

        /* ===== Footer ===== */
        .site-footer {
            background: var(--bg-dark);
            padding: 60px 0 0;
            color: rgba(240,244,250,0.7);
        }
        .footer-grid { display: grid; grid-template-columns: 2fr 1fr 1fr 1fr; gap: 40px; padding-bottom: 40px; border-bottom: 1px solid rgba(240,244,250,0.10); }
        .footer-brand .logo-link { color: var(--text-white); font-size: 1.4rem; margin-bottom: 12px; display: inline-block; }
        .footer-brand p { font-size: 0.9rem; max-width: 300px; margin-top: 12px; }
        .footer-col h4 { color: var(--text-white); font-size: 1.0rem; margin-bottom: 16px; font-weight: 600; }
        .footer-col ul li { margin-bottom: 10px; }
        .footer-col ul li a { color: rgba(240,244,250,0.6); font-size: 0.9rem; transition: var(--transition); }
        .footer-col ul li a:hover { color: var(--accent); }
        .footer-bottom {
            padding: 24px 0;
            display: flex;
            justify-content: space-between;
            align-items: center;
            font-size: 0.85rem;
            color: rgba(240,244,250,0.5);
            flex-wrap: wrap;
            gap: 12px;
        }
        .footer-bottom a { color: rgba(240,244,250,0.5); }
        .footer-bottom a:hover { color: var(--accent); }
        .footer-social { display: flex; gap: 16px; }
        .footer-social a { font-size: 1.2rem; color: rgba(240,244,250,0.5); transition: var(--transition); }
        .footer-social a:hover { color: var(--accent); }

        /* ===== Responsive ===== */
        @media screen and (max-width: 1024px) {
            .card-grid { grid-template-columns: repeat(2, 1fr); }
            .post-grid { grid-template-columns: repeat(2, 1fr); }
            .feature-grid { grid-template-columns: repeat(2, 1fr); }
            .steps-grid { grid-template-columns: repeat(2, 1fr); }
            .cat-grid { grid-template-columns: 1fr; }
            .cat-card { flex-direction: column; }
            .cat-card-img { width: 100%; height: 200px; }
            .footer-grid { grid-template-columns: 1fr 1fr; }
            .hero-title { font-size: 2.4rem; }
        }

        @media screen and (max-width: 768px) {
            .nav-left, .nav-right { display: none; }
            .nav-toggle { display: block; }
            .logo-wrap { position: static; transform: none; }
            .header-inner { justify-content: space-between; }
            .hero-section { padding: 120px 0 60px; min-height: auto; }
            .hero-title { font-size: 2.0rem; }
            .hero-desc { font-size: 1.0rem; }
            .hero-stats { gap: 24px; flex-wrap: wrap; }
            .hero-stat-num { font-size: 1.5rem; }
            .section { padding: 56px 0; }
            .card-grid { grid-template-columns: 1fr; }
            .post-grid { grid-template-columns: 1fr; }
            .feature-grid { grid-template-columns: 1fr; }
            .steps-grid { grid-template-columns: 1fr; }
            .footer-grid { grid-template-columns: 1fr; }
            .footer-bottom { flex-direction: column; text-align: center; }
            .cta-content h2 { font-size: 1.7rem; }
        }

        @media screen and (max-width: 520px) {
            .hero-title { font-size: 1.7rem; }
            .hero-actions { flex-direction: column; align-items: stretch; }
            .btn-primary, .btn-outline-light { justify-content: center; }
            .hero-stats { flex-direction: column; gap: 16px; }
            .container { padding: 0 16px; }
            .section-header h2 { font-size: 1.5rem; }
        }

        /* ===== Utility ===== */
        .text-center { text-align: center; }
        .mt-12 { margin-top: 12px; }
        .mb-12 { margin-bottom: 12px; }
        .gap-8 { gap: 8px; }
        .flex-center { display: flex; align-items: center; justify-content: center; }

        /* ===== Skeleton / 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); }

        /* ===== Foundation Overrides ===== */
        .grid-container { max-width: var(--container-max); padding-left: 20px; padding-right: 20px; }
        .cell { margin-bottom: 0; }

/* roulang page: category1 */
/* ===== Design Variables ===== */
        :root {
            --primary: #1a3a5c;
            --primary-dark: #0f2440;
            --primary-light: #2a5a8a;
            --accent: #e8b84b;
            --accent-light: #f0d080;
            --accent-dark: #c9a030;
            --bg-light: #f8f9fb;
            --bg-white: #ffffff;
            --bg-dark: #0f1a2e;
            --text-primary: #1a2a3a;
            --text-secondary: #4a5a6a;
            --text-light: #8a9aaa;
            --text-white: #f0f2f5;
            --border-color: #e2e6ed;
            --radius-sm: 8px;
            --radius-md: 14px;
            --radius-lg: 24px;
            --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.06);
            --shadow-md: 0 8px 30px rgba(0, 0, 0, 0.08);
            --shadow-lg: 0 20px 60px rgba(0, 0, 0, 0.12);
            --transition: 0.35s cubic-bezier(0.25, 0.46, 0.45, 0.94);
            --font-body: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'PingFang SC', 'Hiragino Sans GB', 'Microsoft YaHei', sans-serif;
        }

        /* ===== 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-body);
            color: var(--text-primary);
            background: var(--bg-light);
            line-height: 1.7;
            font-size: 16px;
        }

        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);
        }

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

        ul,
        ol {
            list-style: none;
        }

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

        @media (max-width: 768px) {
            .container {
                padding: 0 18px;
            }
        }

        /* ===== Header / Nav (shared) ===== */
        .site-header {
            background: var(--bg-white);
            box-shadow: 0 2px 20px rgba(0, 0, 0, 0.06);
            position: sticky;
            top: 0;
            z-index: 1000;
            backdrop-filter: blur(12px);
            background: rgba(255, 255, 255, 0.96);
            border-bottom: 1px solid var(--border-color);
        }

        .header-inner {
            max-width: 1280px;
            margin: 0 auto;
            padding: 0 28px;
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 72px;
            position: relative;
        }

        .nav-left,
        .nav-right {
            display: flex;
            align-items: center;
            gap: 6px;
        }

        .nav-link {
            padding: 8px 18px;
            font-size: 0.92rem;
            font-weight: 500;
            color: var(--text-secondary);
            border-radius: var(--radius-sm);
            transition: var(--transition);
            position: relative;
        }

        .nav-link:hover {
            color: var(--primary);
            background: rgba(26, 58, 92, 0.06);
        }

        .nav-link.active {
            color: var(--primary);
            background: rgba(26, 58, 92, 0.08);
            font-weight: 600;
        }

        .nav-link.active::after {
            content: '';
            position: absolute;
            bottom: 2px;
            left: 50%;
            transform: translateX(-50%);
            width: 24px;
            height: 3px;
            background: var(--accent);
            border-radius: 4px;
        }

        .nav-link.btn-primary {
            background: var(--accent);
            color: var(--primary-dark);
            font-weight: 600;
            border-radius: 30px;
            padding: 8px 26px !important;
            box-shadow: 0 4px 14px rgba(232, 184, 75, 0.35);
        }

        .nav-link.btn-primary:hover {
            background: var(--accent-light);
            transform: translateY(-2px);
            box-shadow: 0 8px 24px rgba(232, 184, 75, 0.45);
        }

        .logo-wrap {
            position: absolute;
            left: 50%;
            top: 50%;
            transform: translate(-50%, -50%);
        }

        .logo-link {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 1.5rem;
            font-weight: 800;
            color: var(--primary-dark);
            letter-spacing: -0.5px;
        }

        .logo-link:hover {
            color: var(--primary-dark);
        }

        .logo-icon {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 40px;
            height: 40px;
            background: var(--primary-dark);
            color: var(--accent);
            border-radius: 12px;
            font-size: 1.3rem;
            font-weight: 800;
            box-shadow: 0 4px 12px rgba(26, 58, 92, 0.2);
        }

        .nav-toggle {
            display: none;
            background: none;
            font-size: 1.5rem;
            color: var(--primary);
            cursor: pointer;
            padding: 6px 10px;
            border-radius: var(--radius-sm);
            transition: var(--transition);
        }

        .nav-toggle:hover {
            background: rgba(26, 58, 92, 0.06);
        }

        /* Mobile Nav */
        @media (max-width: 1024px) {
            .nav-left,
            .nav-right {
                display: none;
            }

            .nav-toggle {
                display: block;
                position: relative;
                z-index: 1001;
            }

            .logo-wrap {
                position: static;
                transform: none;
            }

            .header-inner {
                justify-content: space-between;
            }

            .mobile-nav-open .nav-left,
            .mobile-nav-open .nav-right {
                display: flex;
                flex-direction: column;
                position: fixed;
                top: 0;
                left: 0;
                width: 100%;
                height: 100vh;
                background: rgba(255, 255, 255, 0.98);
                backdrop-filter: blur(16px);
                justify-content: center;
                align-items: center;
                gap: 18px;
                z-index: 999;
                padding: 80px 24px 40px;
            }

            .mobile-nav-open .nav-left {
                top: 0;
            }

            .mobile-nav-open .nav-right {
                top: 220px;
                left: 0;
                height: auto;
                padding-top: 0;
            }

            .mobile-nav-open .nav-link {
                font-size: 1.2rem;
                padding: 14px 30px;
            }

            .mobile-nav-open .nav-link.btn-primary {
                font-size: 1.1rem;
                padding: 16px 40px !important;
            }

            .mobile-nav-open .nav-toggle {
                position: fixed;
                top: 18px;
                right: 24px;
                background: var(--bg-white);
                box-shadow: var(--shadow-sm);
                border-radius: 50%;
                width: 44px;
                height: 44px;
                display: flex;
                align-items: center;
                justify-content: center;
            }
        }

        @media (max-width: 520px) {
            .header-inner {
                padding: 0 14px;
                height: 64px;
            }
            .logo-link {
                font-size: 1.2rem;
            }
            .logo-icon {
                width: 34px;
                height: 34px;
                font-size: 1.1rem;
            }
        }

        /* ===== Page Banner ===== */
        .page-banner {
            background: linear-gradient(135deg, var(--primary-dark) 0%, var(--primary) 60%, var(--primary-light) 100%);
            padding: 80px 0 60px;
            position: relative;
            overflow: hidden;
            min-height: 280px;
            display: flex;
            align-items: center;
        }

        .page-banner::before {
            content: '';
            position: absolute;
            inset: 0;
            background: url('/assets/images/backpic/back-1.png') center/cover no-repeat;
            opacity: 0.15;
            mix-blend-mode: overlay;
        }

        .page-banner .container {
            position: relative;
            z-index: 2;
            text-align: center;
        }

        .page-banner h1 {
            color: #fff;
            font-size: 2.8rem;
            font-weight: 800;
            letter-spacing: -0.5px;
            margin-bottom: 16px;
            text-shadow: 0 2px 20px rgba(0, 0, 0, 0.2);
        }

        .page-banner p {
            color: rgba(255, 255, 255, 0.85);
            font-size: 1.15rem;
            max-width: 680px;
            margin: 0 auto;
            line-height: 1.8;
        }

        .page-banner .breadcrumb {
            display: flex;
            justify-content: center;
            gap: 10px;
            margin-bottom: 20px;
            font-size: 0.9rem;
            color: rgba(255, 255, 255, 0.7);
        }

        .page-banner .breadcrumb a {
            color: rgba(255, 255, 255, 0.85);
        }
        .page-banner .breadcrumb a:hover {
            color: var(--accent);
        }
        .page-banner .breadcrumb span {
            color: var(--accent);
        }

        @media (max-width: 768px) {
            .page-banner {
                padding: 60px 0 40px;
                min-height: 200px;
            }
            .page-banner h1 {
                font-size: 1.8rem;
            }
            .page-banner p {
                font-size: 0.95rem;
            }
        }

        @media (max-width: 520px) {
            .page-banner h1 {
                font-size: 1.4rem;
            }
            .page-banner p {
                font-size: 0.85rem;
            }
        }

        /* ===== Sections ===== */
        .section {
            padding: 72px 0;
        }

        .section-title {
            font-size: 2rem;
            font-weight: 700;
            color: var(--primary-dark);
            margin-bottom: 12px;
            letter-spacing: -0.3px;
        }

        .section-subtitle {
            font-size: 1rem;
            color: var(--text-secondary);
            max-width: 600px;
            margin-bottom: 40px;
            line-height: 1.7;
        }

        .section-divider {
            width: 50px;
            height: 4px;
            background: var(--accent);
            border-radius: 4px;
            margin-bottom: 20px;
        }

        @media (max-width: 768px) {
            .section {
                padding: 48px 0;
            }
            .section-title {
                font-size: 1.5rem;
            }
            .section-subtitle {
                font-size: 0.9rem;
                margin-bottom: 28px;
            }
        }

        /* ===== Cards ===== */
        .card {
            background: var(--bg-white);
            border-radius: var(--radius-md);
            box-shadow: var(--shadow-sm);
            overflow: hidden;
            transition: var(--transition);
            border: 1px solid var(--border-color);
            height: 100%;
            display: flex;
            flex-direction: column;
        }

        .card:hover {
            box-shadow: var(--shadow-md);
            transform: translateY(-4px);
        }

        .card-image {
            width: 100%;
            aspect-ratio: 16/10;
            object-fit: cover;
            transition: var(--transition);
        }

        .card:hover .card-image {
            transform: scale(1.02);
        }

        .card-body {
            padding: 22px 24px 26px;
            flex: 1;
            display: flex;
            flex-direction: column;
        }

        .card-body h3 {
            font-size: 1.15rem;
            font-weight: 700;
            color: var(--primary-dark);
            margin-bottom: 10px;
            line-height: 1.4;
        }

        .card-body p {
            color: var(--text-secondary);
            font-size: 0.92rem;
            line-height: 1.7;
            flex: 1;
            margin-bottom: 16px;
        }

        .card-body .card-tag {
            display: inline-block;
            background: rgba(232, 184, 75, 0.15);
            color: var(--primary-dark);
            font-size: 0.75rem;
            font-weight: 600;
            padding: 4px 14px;
            border-radius: 20px;
            margin-bottom: 12px;
            align-self: flex-start;
        }

        .card-body .card-link {
            font-weight: 600;
            color: var(--primary-light);
            font-size: 0.9rem;
            display: inline-flex;
            align-items: center;
            gap: 6px;
        }
        .card-body .card-link:hover {
            color: var(--accent-dark);
            gap: 10px;
        }

        /* ===== Guide Steps ===== */
        .step-list {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
            gap: 28px;
            margin-top: 20px;
        }

        .step-item {
            background: var(--bg-white);
            border-radius: var(--radius-md);
            padding: 32px 28px;
            box-shadow: var(--shadow-sm);
            border: 1px solid var(--border-color);
            transition: var(--transition);
            text-align: center;
            position: relative;
        }

        .step-item:hover {
            box-shadow: var(--shadow-md);
            transform: translateY(-3px);
        }

        .step-number {
            width: 52px;
            height: 52px;
            border-radius: 50%;
            background: var(--primary-dark);
            color: var(--accent);
            font-size: 1.3rem;
            font-weight: 800;
            display: flex;
            align-items: center;
            justify-content: center;
            margin: 0 auto 18px;
            box-shadow: 0 6px 20px rgba(26, 58, 92, 0.2);
        }

        .step-item h4 {
            font-size: 1.1rem;
            font-weight: 700;
            color: var(--primary-dark);
            margin-bottom: 10px;
        }

        .step-item p {
            color: var(--text-secondary);
            font-size: 0.9rem;
            line-height: 1.7;
        }

        /* ===== FAQ ===== */
        .faq-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 20px;
        }

        .faq-item {
            background: var(--bg-white);
            border-radius: var(--radius-md);
            padding: 24px 28px;
            box-shadow: var(--shadow-sm);
            border: 1px solid var(--border-color);
            transition: var(--transition);
        }

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

        .faq-item h4 {
            font-size: 1rem;
            font-weight: 700;
            color: var(--primary-dark);
            margin-bottom: 8px;
            display: flex;
            align-items: center;
            gap: 10px;
        }

        .faq-item h4 i {
            color: var(--accent);
            font-size: 1.1rem;
        }

        .faq-item p {
            color: var(--text-secondary);
            font-size: 0.9rem;
            line-height: 1.7;
            padding-left: 28px;
        }

        @media (max-width: 768px) {
            .faq-grid {
                grid-template-columns: 1fr;
            }
            .faq-item {
                padding: 18px 20px;
            }
        }

        /* ===== CTA ===== */
        .cta-section {
            background: linear-gradient(135deg, var(--primary-dark) 0%, var(--primary) 80%);
            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/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;
            font-weight: 800;
            margin-bottom: 16px;
        }

        .cta-section p {
            color: rgba(255, 255, 255, 0.8);
            font-size: 1.05rem;
            max-width: 560px;
            margin: 0 auto 32px;
        }

        .cta-section .cta-btn {
            display: inline-block;
            background: var(--accent);
            color: var(--primary-dark);
            font-weight: 700;
            font-size: 1.05rem;
            padding: 16px 48px;
            border-radius: 40px;
            box-shadow: 0 8px 30px rgba(232, 184, 75, 0.4);
            transition: var(--transition);
        }

        .cta-section .cta-btn:hover {
            background: var(--accent-light);
            transform: translateY(-3px);
            box-shadow: 0 12px 40px rgba(232, 184, 75, 0.55);
        }

        @media (max-width: 768px) {
            .cta-section {
                padding: 48px 0;
            }
            .cta-section h2 {
                font-size: 1.5rem;
            }
            .cta-section p {
                font-size: 0.9rem;
            }
            .cta-section .cta-btn {
                padding: 14px 34px;
                font-size: 0.95rem;
            }
        }

        /* ===== Resources / Content List ===== */
        .resource-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
            gap: 28px;
        }

        .resource-card {
            background: var(--bg-white);
            border-radius: var(--radius-md);
            overflow: hidden;
            box-shadow: var(--shadow-sm);
            border: 1px solid var(--border-color);
            transition: var(--transition);
            display: flex;
            flex-direction: column;
        }

        .resource-card:hover {
            box-shadow: var(--shadow-md);
            transform: translateY(-4px);
        }

        .resource-card .rc-image {
            width: 100%;
            aspect-ratio: 16/9;
            object-fit: cover;
        }

        .resource-card .rc-body {
            padding: 20px 22px 24px;
            flex: 1;
            display: flex;
            flex-direction: column;
        }

        .resource-card .rc-body h3 {
            font-size: 1.05rem;
            font-weight: 700;
            color: var(--primary-dark);
            margin-bottom: 8px;
            line-height: 1.4;
        }

        .resource-card .rc-body p {
            color: var(--text-secondary);
            font-size: 0.88rem;
            line-height: 1.7;
            flex: 1;
            margin-bottom: 12px;
        }

        .resource-card .rc-meta {
            display: flex;
            align-items: center;
            gap: 16px;
            font-size: 0.8rem;
            color: var(--text-light);
            border-top: 1px solid var(--border-color);
            padding-top: 12px;
            margin-top: auto;
        }

        .resource-card .rc-meta i {
            margin-right: 4px;
        }

        /* ===== Tags ===== */
        .tag-list {
            display: flex;
            flex-wrap: wrap;
            gap: 10px;
            margin-top: 16px;
        }

        .tag {
            display: inline-block;
            background: var(--bg-white);
            border: 1px solid var(--border-color);
            color: var(--text-secondary);
            font-size: 0.8rem;
            padding: 6px 18px;
            border-radius: 30px;
            transition: var(--transition);
            font-weight: 500;
        }

        .tag:hover {
            background: var(--primary-dark);
            color: #fff;
            border-color: var(--primary-dark);
            transform: translateY(-2px);
        }

        /* ===== Stats ===== */
        .stats-row {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(160px, 1fr));
            gap: 24px;
            text-align: center;
            margin-top: 20px;
        }

        .stat-item {
            background: var(--bg-white);
            border-radius: var(--radius-md);
            padding: 28px 20px;
            box-shadow: var(--shadow-sm);
            border: 1px solid var(--border-color);
        }

        .stat-item .number {
            font-size: 2.2rem;
            font-weight: 800;
            color: var(--primary-dark);
            line-height: 1.2;
        }

        .stat-item .label {
            font-size: 0.85rem;
            color: var(--text-secondary);
            margin-top: 6px;
        }

        /* ===== Footer (shared) ===== */
        .site-footer {
            background: var(--bg-dark);
            color: rgba(255, 255, 255, 0.8);
            padding: 60px 0 0;
        }

        .site-footer .footer-grid {
            display: grid;
            grid-template-columns: 1.8fr 1fr 1fr 1fr;
            gap: 40px;
            margin-bottom: 32px;
        }

        .site-footer .footer-brand .logo-link {
            font-size: 1.4rem;
            color: #fff;
            margin-bottom: 14px;
            display: inline-flex;
        }

        .site-footer .footer-brand p {
            font-size: 0.88rem;
            line-height: 1.8;
            color: rgba(255, 255, 255, 0.6);
            max-width: 320px;
        }

        .site-footer .footer-social a {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 40px;
            height: 40px;
            border-radius: 50%;
            background: rgba(255, 255, 255, 0.08);
            color: rgba(255, 255, 255, 0.7);
            font-size: 1.1rem;
            margin-right: 10px;
            transition: var(--transition);
        }

        .site-footer .footer-social a:hover {
            background: var(--accent);
            color: var(--primary-dark);
            transform: translateY(-3px);
        }

        .site-footer .footer-col h4 {
            color: #fff;
            font-size: 1rem;
            font-weight: 700;
            margin-bottom: 18px;
            position: relative;
            padding-bottom: 10px;
        }

        .site-footer .footer-col h4::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 0;
            width: 30px;
            height: 3px;
            background: var(--accent);
            border-radius: 4px;
        }

        .site-footer .footer-col ul li {
            margin-bottom: 10px;
            font-size: 0.88rem;
        }

        .site-footer .footer-col ul li a {
            color: rgba(255, 255, 255, 0.6);
            transition: var(--transition);
        }
        .site-footer .footer-col ul li a:hover {
            color: var(--accent);
            padding-left: 4px;
        }

        .site-footer .footer-bottom {
            border-top: 1px solid rgba(255, 255, 255, 0.08);
            padding: 22px 0;
            display: flex;
            justify-content: space-between;
            align-items: center;
            font-size: 0.82rem;
            color: rgba(255, 255, 255, 0.5);
            flex-wrap: wrap;
            gap: 8px;
        }

        .site-footer .footer-bottom a {
            color: rgba(255, 255, 255, 0.6);
        }
        .site-footer .footer-bottom a:hover {
            color: var(--accent);
        }

        @media (max-width: 1024px) {
            .site-footer .footer-grid {
                grid-template-columns: 1fr 1fr;
                gap: 30px;
            }
        }

        @media (max-width: 768px) {
            .site-footer {
                padding: 40px 0 0;
            }
            .site-footer .footer-grid {
                grid-template-columns: 1fr;
                gap: 24px;
            }
            .site-footer .footer-bottom {
                flex-direction: column;
                text-align: center;
                gap: 6px;
            }
        }

        /* ===== Utility ===== */
        .text-center {
            text-align: center;
        }
        .mt-20 {
            margin-top: 20px;
        }
        .mb-20 {
            margin-bottom: 20px;
        }
        .gap-16 {
            gap: 16px;
        }

        /* ===== Responsive fine-tune ===== */
        @media (max-width: 1024px) {
            .resource-grid {
                grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
            }
            .step-list {
                grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
            }
        }

        @media (max-width: 520px) {
            .section-title {
                font-size: 1.3rem;
            }
            .resource-grid {
                grid-template-columns: 1fr;
            }
            .step-list {
                grid-template-columns: 1fr;
            }
            .stats-row {
                grid-template-columns: 1fr 1fr;
            }
            .stat-item .number {
                font-size: 1.6rem;
            }
            .card-body {
                padding: 16px 18px 20px;
            }
        }

/* roulang page: article */
/* ===== Design Variables ===== */
        :root {
            --primary: #1a3a5c;
            --primary-light: #2a5a8c;
            --primary-dark: #0f2440;
            --secondary: #e8a838;
            --secondary-light: #f0c060;
            --secondary-dark: #c88a20;
            --accent: #3bb5a0;
            --accent-light: #5ed0b8;
            --bg-body: #f5f7fa;
            --bg-card: #ffffff;
            --bg-dark: #132030;
            --text-primary: #1a2a3a;
            --text-secondary: #4a5a6a;
            --text-light: #7a8a9a;
            --text-white: #f0f4f8;
            --border-color: #e2e8f0;
            --radius-sm: 8px;
            --radius-md: 14px;
            --radius-lg: 22px;
            --shadow-sm: 0 2px 8px rgba(0,0,0,0.05);
            --shadow-md: 0 6px 24px rgba(0,0,0,0.08);
            --shadow-lg: 0 14px 40px rgba(0,0,0,0.10);
            --spacing-xs: 6px;
            --spacing-sm: 12px;
            --spacing-md: 24px;
            --spacing-lg: 48px;
            --spacing-xl: 80px;
            --font-base: 'PingFang SC','Microsoft YaHei','Helvetica Neue',Arial,sans-serif;
            --transition: 0.25s cubic-bezier(0.4,0,0.2,1);
        }

        /* ===== 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-base);
            background: var(--bg-body);
            color: var(--text-primary);
            line-height: 1.7;
            font-size: 16px;
        }
        a { color: var(--primary-light); text-decoration: none; transition: var(--transition); }
        a:hover { color: var(--secondary); }
        a:focus-visible { outline: 3px solid var(--secondary); outline-offset: 3px; border-radius: 4px; }
        img { max-width: 100%; height: auto; display: block; }
        button, input, textarea { font-family: inherit; font-size: 1rem; }
        ul, ol { list-style: none; }
        h1, h2, h3, h4, h5, h6 { line-height: 1.3; color: var(--text-primary); font-weight: 700; }
        h1 { font-size: 2.2rem; }
        h2 { font-size: 1.8rem; }
        h3 { font-size: 1.4rem; }
        h4 { font-size: 1.15rem; }
        p { margin-bottom: 1rem; }
        .container { max-width: 1280px; margin: 0 auto; padding: 0 24px; }
        .container-narrow { max-width: 860px; margin: 0 auto; padding: 0 24px; }

        /* ===== Header & Navigation ===== */
        .site-header {
            background: var(--bg-card);
            box-shadow: 0 2px 20px rgba(0,0,0,0.04);
            position: sticky;
            top: 0;
            z-index: 100;
            border-bottom: 1px solid var(--border-color);
            backdrop-filter: blur(10px);
            -webkit-backdrop-filter: blur(10px);
        }
        .header-inner {
            max-width: 1280px;
            margin: 0 auto;
            padding: 0 24px;
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 68px;
            position: relative;
        }
        .nav-left, .nav-right {
            display: flex;
            align-items: center;
            gap: 6px;
        }
        .nav-left .nav-link, .nav-right .nav-link {
            padding: 8px 16px;
            border-radius: var(--radius-sm);
            font-size: 0.92rem;
            font-weight: 500;
            color: var(--text-secondary);
            transition: var(--transition);
            white-space: nowrap;
        }
        .nav-left .nav-link:hover, .nav-right .nav-link:hover {
            color: var(--primary);
            background: rgba(26,58,92,0.05);
        }
        .nav-left .nav-link.active, .nav-right .nav-link.active {
            color: var(--primary);
            background: rgba(26,58,92,0.08);
            font-weight: 600;
        }
        .logo-wrap {
            position: absolute;
            left: 50%;
            transform: translateX(-50%);
        }
        .logo-link {
            display: flex;
            align-items: center;
            gap: 6px;
            font-size: 1.35rem;
            font-weight: 800;
            color: var(--primary);
            letter-spacing: -0.3px;
        }
        .logo-link:hover { color: var(--primary); opacity: 0.85; }
        .logo-icon {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 38px;
            height: 38px;
            background: var(--secondary);
            color: var(--primary-dark);
            border-radius: 10px;
            font-weight: 700;
            font-size: 1.2rem;
        }
        .nav-right .btn-primary {
            background: var(--secondary);
            color: var(--primary-dark) !important;
            border-radius: 30px;
            padding: 8px 24px !important;
            font-weight: 600;
            font-size: 0.88rem !important;
            transition: var(--transition);
            box-shadow: 0 4px 12px rgba(232,168,56,0.25);
        }
        .nav-right .btn-primary:hover {
            background: var(--secondary-light);
            transform: translateY(-1px);
            box-shadow: 0 6px 20px rgba(232,168,56,0.35);
        }
        .nav-toggle {
            display: none;
            background: none;
            border: 2px solid var(--border-color);
            border-radius: var(--radius-sm);
            padding: 8px 12px;
            font-size: 1.3rem;
            color: var(--text-primary);
            cursor: pointer;
            transition: var(--transition);
        }
        .nav-toggle:hover { border-color: var(--primary); color: var(--primary); }
        .nav-toggle:focus-visible { outline: 3px solid var(--secondary); outline-offset: 3px; }

        /* Mobile Nav */
        .mobile-nav {
            display: none;
            position: fixed;
            top: 68px;
            left: 0;
            right: 0;
            bottom: 0;
            background: var(--bg-card);
            z-index: 99;
            padding: 24px;
            overflow-y: auto;
            flex-direction: column;
            gap: 8px;
            border-top: 1px solid var(--border-color);
            box-shadow: 0 20px 60px rgba(0,0,0,0.1);
        }
        .mobile-nav.open { display: flex; }
        .mobile-nav .nav-link {
            display: block;
            padding: 14px 18px;
            border-radius: var(--radius-sm);
            font-size: 1.05rem;
            font-weight: 500;
            color: var(--text-secondary);
            transition: var(--transition);
        }
        .mobile-nav .nav-link:hover { background: rgba(26,58,92,0.05); color: var(--primary); }
        .mobile-nav .nav-link.active { background: rgba(26,58,92,0.08); color: var(--primary); font-weight: 600; }
        .mobile-nav .btn-primary {
            background: var(--secondary);
            color: var(--primary-dark) !important;
            text-align: center;
            border-radius: 30px;
            margin-top: 8px;
        }

        /* ===== Hero Banner (Article) ===== */
        .article-hero {
            position: relative;
            padding: 80px 0 60px;
            background: linear-gradient(135deg, var(--primary-dark) 0%, var(--primary) 60%, var(--primary-light) 100%);
            overflow: hidden;
            min-height: 280px;
            display: flex;
            align-items: center;
        }
        .article-hero::before {
            content: '';
            position: absolute;
            inset: 0;
            background: url('/assets/images/backpic/back-2.png') center/cover no-repeat;
            opacity: 0.12;
            mix-blend-mode: overlay;
        }
        .article-hero::after {
            content: '';
            position: absolute;
            bottom: -2px;
            left: 0;
            right: 0;
            height: 60px;
            background: var(--bg-body);
            clip-path: ellipse(70% 100% at 50% 100%);
        }
        .article-hero .hero-content {
            position: relative;
            z-index: 2;
            text-align: center;
            color: var(--text-white);
        }
        .article-hero h1 {
            font-size: 2.4rem;
            color: #fff;
            margin-bottom: 16px;
            max-width: 800px;
            margin-left: auto;
            margin-right: auto;
            line-height: 1.35;
        }
        .article-hero .meta-line {
            display: flex;
            justify-content: center;
            align-items: center;
            gap: 20px;
            flex-wrap: wrap;
            font-size: 0.95rem;
            color: rgba(255,255,255,0.7);
        }
        .article-hero .meta-line span { display: flex; align-items: center; gap: 6px; }
        .article-hero .meta-line i { color: var(--secondary); }
        .article-hero .category-badge {
            display: inline-block;
            background: var(--secondary);
            color: var(--primary-dark);
            padding: 4px 16px;
            border-radius: 30px;
            font-size: 0.82rem;
            font-weight: 600;
            letter-spacing: 0.5px;
        }

        /* ===== Article Main ===== */
        .article-main {
            padding: 50px 0 70px;
            position: relative;
            z-index: 2;
        }
        .article-body {
            background: var(--bg-card);
            border-radius: var(--radius-lg);
            box-shadow: var(--shadow-md);
            padding: 48px 52px;
            font-size: 1.04rem;
            line-height: 1.85;
            color: var(--text-primary);
        }
        .article-body p { margin-bottom: 1.2rem; }
        .article-body h2, .article-body h3 { margin-top: 2rem; margin-bottom: 1rem; }
        .article-body h2 { font-size: 1.7rem; border-bottom: 2px solid var(--border-color); padding-bottom: 10px; }
        .article-body h3 { font-size: 1.35rem; }
        .article-body ul, .article-body ol { margin-bottom: 1.2rem; padding-left: 1.6rem; }
        .article-body ul { list-style: disc; }
        .article-body ol { list-style: decimal; }
        .article-body li { margin-bottom: 0.5rem; }
        .article-body img { border-radius: var(--radius-md); margin: 1.5rem 0; box-shadow: var(--shadow-sm); }
        .article-body blockquote {
            border-left: 4px solid var(--secondary);
            background: rgba(232,168,56,0.08);
            padding: 18px 24px;
            border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
            margin: 1.5rem 0;
            color: var(--text-secondary);
            font-style: italic;
        }
        .article-body a { color: var(--primary-light); text-decoration: underline; text-underline-offset: 3px; }
        .article-body a:hover { color: var(--secondary); }

        .article-meta-footer {
            display: flex;
            justify-content: space-between;
            align-items: center;
            flex-wrap: wrap;
            gap: 16px;
            margin-top: 40px;
            padding-top: 24px;
            border-top: 1px solid var(--border-color);
        }
        .article-tags {
            display: flex;
            gap: 8px;
            flex-wrap: wrap;
        }
        .article-tags .tag {
            display: inline-block;
            background: rgba(26,58,92,0.06);
            color: var(--text-secondary);
            padding: 5px 16px;
            border-radius: 30px;
            font-size: 0.82rem;
            font-weight: 500;
            transition: var(--transition);
        }
        .article-tags .tag:hover { background: var(--primary); color: #fff; }
        .article-share {
            display: flex;
            align-items: center;
            gap: 10px;
        }
        .article-share span { font-size: 0.88rem; color: var(--text-light); }
        .article-share a {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 36px;
            height: 36px;
            border-radius: 50%;
            background: rgba(26,58,92,0.06);
            color: var(--text-secondary);
            transition: var(--transition);
        }
        .article-share a:hover { background: var(--primary); color: #fff; }

        /* ===== Not Found ===== */
        .not-found-block {
            text-align: center;
            padding: 80px 24px;
            background: var(--bg-card);
            border-radius: var(--radius-lg);
            box-shadow: var(--shadow-md);
        }
        .not-found-block i { font-size: 3.5rem; color: var(--text-light); margin-bottom: 20px; }
        .not-found-block h2 { font-size: 1.8rem; margin-bottom: 12px; }
        .not-found-block p { color: var(--text-secondary); margin-bottom: 24px; }
        .not-found-block .btn-back {
            display: inline-block;
            padding: 12px 36px;
            background: var(--primary);
            color: #fff;
            border-radius: 30px;
            font-weight: 600;
            transition: var(--transition);
        }
        .not-found-block .btn-back:hover { background: var(--primary-light); transform: translateY(-2px); }

        /* ===== Related Section ===== */
        .related-section {
            margin-top: 48px;
            padding-top: 40px;
            border-top: 1px solid var(--border-color);
        }
        .related-section h3 {
            font-size: 1.4rem;
            margin-bottom: 24px;
            display: flex;
            align-items: center;
            gap: 10px;
        }
        .related-section h3 i { color: var(--secondary); }
        .related-grid {
            display: grid;
            grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
            gap: 20px;
        }
        .related-card {
            background: var(--bg-card);
            border-radius: var(--radius-md);
            box-shadow: var(--shadow-sm);
            padding: 20px 22px;
            transition: var(--transition);
            border: 1px solid var(--border-color);
        }
        .related-card:hover {
            box-shadow: var(--shadow-md);
            transform: translateY(-3px);
            border-color: var(--secondary);
        }
        .related-card .rc-title {
            font-size: 1rem;
            font-weight: 600;
            color: var(--text-primary);
            margin-bottom: 8px;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }
        .related-card .rc-meta {
            font-size: 0.82rem;
            color: var(--text-light);
        }

        /* ===== Footer ===== */
        .site-footer {
            background: var(--bg-dark);
            color: rgba(255,255,255,0.7);
            padding: 60px 0 30px;
            margin-top: 20px;
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 1.8fr 1fr 1fr 1.2fr;
            gap: 40px;
            margin-bottom: 40px;
        }
        .footer-brand .logo-link { color: #fff; font-size: 1.3rem; margin-bottom: 12px; display: inline-block; }
        .footer-brand p { font-size: 0.92rem; line-height: 1.7; color: rgba(255,255,255,0.55); max-width: 320px; }
        .footer-social a {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 38px;
            height: 38px;
            border-radius: 50%;
            background: rgba(255,255,255,0.06);
            color: rgba(255,255,255,0.5);
            margin-right: 8px;
            transition: var(--transition);
        }
        .footer-social a:hover { background: var(--secondary); color: var(--primary-dark); }
        .footer-col h4 { color: #fff; font-size: 1rem; margin-bottom: 16px; font-weight: 600; }
        .footer-col ul li { margin-bottom: 10px; }
        .footer-col ul li a { color: rgba(255,255,255,0.5); font-size: 0.9rem; transition: var(--transition); }
        .footer-col ul li a:hover { color: var(--secondary); padding-left: 4px; }
        .footer-col ul li i { color: var(--secondary); width: 18px; }
        .footer-bottom {
            border-top: 1px solid rgba(255,255,255,0.06);
            padding-top: 24px;
            display: flex;
            justify-content: space-between;
            align-items: center;
            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(--secondary); }

        /* ===== Responsive ===== */
        @media (max-width: 1024px) {
            .footer-grid { grid-template-columns: 1fr 1fr; gap: 30px; }
            .article-body { padding: 36px 32px; }
        }
        @media (max-width: 768px) {
            .nav-left, .nav-right { display: none; }
            .nav-toggle { display: block; }
            .logo-wrap { position: static; transform: none; }
            .header-inner { justify-content: space-between; }
            .article-hero { padding: 60px 0 50px; min-height: 220px; }
            .article-hero h1 { font-size: 1.6rem; }
            .article-hero .meta-line { gap: 12px; font-size: 0.85rem; }
            .article-body { padding: 28px 20px; border-radius: var(--radius-md); }
            .article-body h2 { font-size: 1.4rem; }
            .article-body h3 { font-size: 1.2rem; }
            .article-meta-footer { flex-direction: column; align-items: flex-start; }
            .footer-grid { grid-template-columns: 1fr; gap: 24px; }
            .footer-bottom { flex-direction: column; text-align: center; }
            .related-grid { grid-template-columns: 1fr; }
        }
        @media (max-width: 520px) {
            .container { padding: 0 16px; }
            .article-hero h1 { font-size: 1.3rem; }
            .article-body { padding: 20px 16px; font-size: 0.95rem; }
            .article-body h2 { font-size: 1.25rem; }
            .related-grid { grid-template-columns: 1fr; }
        }

        /* ===== Skeleton / Loading fade ===== */
        .fade-in { animation: fadeIn 0.5s ease forwards; }
        @keyframes fadeIn { from { opacity: 0; transform: translateY(12px); } to { opacity: 1; transform: translateY(0); } }

        /* ===== Print ===== */
        @media print {
            .site-header, .site-footer, .related-section, .article-share { display: none !important; }
            .article-body { box-shadow: none; padding: 0; }
            .article-hero { padding: 30px 0; background: #fff !important; color: #000 !important; }
            .article-hero h1 { color: #000 !important; }
            .article-hero .meta-line { color: #666 !important; }
        }

/* roulang page: category2 */
/* ===== 设计变量 ===== */
        :root {
            --primary: #0b2b5c;
            --primary-light: #1a4a7a;
            --primary-dark: #071e40;
            --accent: #f0b429;
            --accent-light: #f7d06a;
            --accent-dark: #d49a1a;
            --bg-body: #f5f7fa;
            --bg-card: #ffffff;
            --bg-dark: #0a1a2f;
            --text-primary: #1a1a2e;
            --text-secondary: #4a4a6a;
            --text-light: #8a8aaa;
            --text-white: #f0f2f5;
            --border-color: #e2e6ef;
            --radius-sm: 6px;
            --radius-md: 12px;
            --radius-lg: 20px;
            --radius-xl: 28px;
            --shadow-sm: 0 2px 8px rgba(10, 20, 40, 0.06);
            --shadow-md: 0 6px 24px rgba(10, 20, 40, 0.08);
            --shadow-lg: 0 16px 48px rgba(10, 20, 40, 0.12);
            --transition: 0.25s cubic-bezier(0.4, 0, 0.2, 1);
            --font-body: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, 'PingFang SC', 'Microsoft YaHei', sans-serif;
            --max-width: 1200px;
            --header-height: 76px;
        }

        /* ===== 基础 Reset ===== */
        *,
        *::before,
        *::after {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
        }
        html {
            scroll-behavior: smooth;
            -webkit-text-size-adjust: 100%;
        }
        body {
            font-family: var(--font-body);
            background: var(--bg-body);
            color: var(--text-primary);
            line-height: 1.6;
            font-size: 16px;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
            padding-top: var(--header-height);
        }
        a {
            color: var(--primary-light);
            text-decoration: none;
            transition: color var(--transition);
        }
        a:hover,
        a:focus-visible {
            color: var(--accent-dark);
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
            border-radius: var(--radius-sm);
        }
        button,
        input,
        select,
        textarea {
            font-family: inherit;
            font-size: inherit;
            line-height: inherit;
        }
        ul,
        ol {
            list-style: none;
            padding: 0;
            margin: 0;
        }
        h1,
        h2,
        h3,
        h4,
        h5,
        h6 {
            font-weight: 700;
            line-height: 1.3;
            color: var(--text-primary);
        }
        p {
            margin-bottom: 0.8rem;
            color: var(--text-secondary);
        }

        /* ===== 容器 ===== */
        .container {
            max-width: var(--max-width);
            margin: 0 auto;
            padding: 0 24px;
            width: 100%;
        }
        @media screen and (max-width: 768px) {
            .container {
                padding: 0 16px;
            }
        }

        /* ===== 头部 & 导航 ===== */
        .site-header {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            z-index: 1000;
            height: var(--header-height);
            background: rgba(255, 255, 255, 0.92);
            backdrop-filter: blur(20px);
            -webkit-backdrop-filter: blur(20px);
            border-bottom: 1px solid rgba(226, 230, 239, 0.6);
            box-shadow: 0 1px 12px rgba(10, 20, 40, 0.04);
            transition: background var(--transition), box-shadow var(--transition);
        }
        .site-header.scrolled {
            background: rgba(255, 255, 255, 0.98);
            box-shadow: 0 4px 20px rgba(10, 20, 40, 0.08);
        }
        .header-inner {
            max-width: var(--max-width);
            margin: 0 auto;
            padding: 0 24px;
            display: flex;
            align-items: center;
            justify-content: center;
            height: 100%;
            position: relative;
        }
        /* 左导航 */
        .nav-left {
            display: flex;
            align-items: center;
            gap: 8px;
            flex: 1;
            justify-content: flex-start;
        }
        .nav-left .nav-link:last-child {
            margin-right: 0;
        }
        /* 右导航 */
        .nav-right {
            display: flex;
            align-items: center;
            gap: 8px;
            flex: 1;
            justify-content: flex-end;
        }
        .nav-link {
            display: inline-block;
            padding: 6px 18px;
            font-size: 0.92rem;
            font-weight: 500;
            color: var(--text-secondary);
            border-radius: var(--radius-sm);
            transition: color var(--transition), background var(--transition), box-shadow var(--transition);
            white-space: nowrap;
            position: relative;
        }
        .nav-link:hover {
            color: var(--primary);
            background: rgba(11, 43, 92, 0.04);
        }
        .nav-link.active {
            color: var(--primary);
            font-weight: 600;
        }
        .nav-link.active::after {
            content: '';
            position: absolute;
            bottom: 2px;
            left: 50%;
            transform: translateX(-50%);
            width: 60%;
            height: 3px;
            background: var(--accent);
            border-radius: 4px;
        }
        .nav-link.btn-primary {
            background: var(--accent);
            color: var(--primary-dark);
            border-radius: var(--radius-md);
            padding: 8px 24px !important;
            font-weight: 600;
            box-shadow: 0 4px 12px rgba(240, 180, 41, 0.3);
            transition: background var(--transition), transform var(--transition), box-shadow var(--transition);
        }
        .nav-link.btn-primary:hover {
            background: var(--accent-light);
            transform: translateY(-1px);
            box-shadow: 0 6px 20px rgba(240, 180, 41, 0.4);
            color: var(--primary-dark);
        }
        /* Logo 居中 */
        .logo-wrap {
            position: absolute;
            left: 50%;
            top: 50%;
            transform: translate(-50%, -50%);
            z-index: 2;
        }
        .logo-link {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 1.5rem;
            font-weight: 800;
            color: var(--primary);
            letter-spacing: -0.5px;
            transition: opacity var(--transition);
        }
        .logo-link:hover {
            opacity: 0.85;
            color: var(--primary);
        }
        .logo-icon {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 38px;
            height: 38px;
            background: var(--accent);
            color: var(--primary-dark);
            border-radius: var(--radius-md);
            font-size: 1.3rem;
            font-weight: 800;
            box-shadow: 0 2px 8px rgba(240, 180, 41, 0.3);
        }
        /* 移动端 toggle */
        .nav-toggle {
            display: none;
            background: none;
            border: none;
            font-size: 1.5rem;
            color: var(--primary);
            cursor: pointer;
            padding: 8px;
            border-radius: var(--radius-sm);
            transition: background var(--transition);
            z-index: 10;
            margin-left: auto;
        }
        .nav-toggle:hover {
            background: rgba(11, 43, 92, 0.06);
        }
        .nav-toggle:focus-visible {
            outline: 2px solid var(--accent);
            outline-offset: 2px;
        }

        /* ===== 移动端导航抽屉 ===== */
        .mobile-drawer {
            display: none;
            position: fixed;
            top: var(--header-height);
            left: 0;
            right: 0;
            bottom: 0;
            background: rgba(255, 255, 255, 0.98);
            backdrop-filter: blur(12px);
            -webkit-backdrop-filter: blur(12px);
            padding: 24px 20px 40px;
            flex-direction: column;
            gap: 12px;
            overflow-y: auto;
            z-index: 999;
            box-shadow: inset 0 12px 24px rgba(10, 20, 40, 0.04);
            transition: opacity 0.3s ease, transform 0.3s ease;
            opacity: 0;
            transform: translateY(-8px);
            pointer-events: none;
        }
        .mobile-drawer.open {
            opacity: 1;
            transform: translateY(0);
            pointer-events: auto;
        }
        .mobile-drawer .nav-link {
            display: block;
            padding: 14px 20px;
            font-size: 1.05rem;
            border-radius: var(--radius-md);
            border-bottom: 1px solid var(--border-color);
        }
        .mobile-drawer .nav-link.active {
            background: rgba(11, 43, 92, 0.06);
        }
        .mobile-drawer .nav-link.btn-primary {
            text-align: center;
            margin-top: 8px;
        }

        /* ===== Hero Banner ===== */
        .category-hero {
            position: relative;
            padding: 100px 0 80px;
            background: var(--bg-dark);
            background-image: linear-gradient(135deg, rgba(10, 26, 47, 0.92) 0%, rgba(11, 43, 92, 0.88) 100%), url('/assets/images/backpic/back-2.png');
            background-size: cover;
            background-position: center;
            background-blend-mode: overlay;
            color: var(--text-white);
            overflow: hidden;
        }
        .category-hero::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 0;
            right: 0;
            height: 120px;
            background: linear-gradient(to top, var(--bg-body), transparent);
            pointer-events: none;
        }
        .category-hero .hero-content {
            position: relative;
            z-index: 2;
            max-width: 800px;
            margin: 0 auto;
            text-align: center;
        }
        .category-hero .hero-badge {
            display: inline-block;
            background: rgba(240, 180, 41, 0.18);
            color: var(--accent-light);
            padding: 6px 20px;
            border-radius: 100px;
            font-size: 0.85rem;
            font-weight: 600;
            letter-spacing: 1px;
            margin-bottom: 20px;
            backdrop-filter: blur(4px);
            border: 1px solid rgba(240, 180, 41, 0.2);
        }
        .category-hero h1 {
            font-size: 3rem;
            font-weight: 800;
            color: #fff;
            margin-bottom: 16px;
            letter-spacing: -0.5px;
        }
        .category-hero h1 span {
            color: var(--accent);
        }
        .category-hero .hero-desc {
            font-size: 1.15rem;
            color: rgba(255, 255, 255, 0.8);
            max-width: 640px;
            margin: 0 auto 28px;
            line-height: 1.7;
        }
        .category-hero .hero-stats {
            display: flex;
            justify-content: center;
            gap: 40px;
            flex-wrap: wrap;
            margin-top: 16px;
        }
        .category-hero .hero-stats .stat-item {
            text-align: center;
        }
        .category-hero .hero-stats .stat-number {
            font-size: 2rem;
            font-weight: 800;
            color: var(--accent);
            display: block;
        }
        .category-hero .hero-stats .stat-label {
            font-size: 0.9rem;
            color: rgba(255, 255, 255, 0.7);
        }

        /* ===== 板块通用 ===== */
        .section {
            padding: 80px 0;
        }
        .section-alt {
            background: #ffffff;
        }
        .section-dark {
            background: var(--bg-dark);
            color: var(--text-white);
        }
        .section-dark h2,
        .section-dark h3,
        .section-dark p {
            color: #fff;
        }
        .section-title {
            font-size: 2rem;
            font-weight: 800;
            margin-bottom: 12px;
            letter-spacing: -0.3px;
        }
        .section-subtitle {
            font-size: 1.05rem;
            color: var(--text-secondary);
            max-width: 600px;
            margin: 0 auto 40px;
            text-align: center;
        }
        .section-dark .section-subtitle {
            color: rgba(255, 255, 255, 0.7);
        }
        .text-center {
            text-align: center;
        }

        /* ===== 卡片网格 ===== */
        .card-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
            gap: 28px;
        }
        .card-grid-3 {
            grid-template-columns: repeat(3, 1fr);
        }
        .card-grid-4 {
            grid-template-columns: repeat(4, 1fr);
        }
        .card {
            background: var(--bg-card);
            border-radius: var(--radius-md);
            box-shadow: var(--shadow-sm);
            overflow: hidden;
            transition: transform var(--transition), box-shadow var(--transition);
            border: 1px solid var(--border-color);
        }
        .card:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow-md);
        }
        .card-image {
            width: 100%;
            aspect-ratio: 16 / 9;
            object-fit: cover;
            display: block;
        }
        .card-body {
            padding: 22px 24px 26px;
        }
        .card-body h3 {
            font-size: 1.15rem;
            font-weight: 700;
            margin-bottom: 8px;
        }
        .card-body p {
            font-size: 0.92rem;
            color: var(--text-secondary);
            margin-bottom: 12px;
        }
        .card-body .card-tag {
            display: inline-block;
            background: rgba(11, 43, 92, 0.06);
            color: var(--primary-light);
            padding: 2px 14px;
            border-radius: 100px;
            font-size: 0.78rem;
            font-weight: 500;
        }
        .card-footer {
            padding: 12px 24px 16px;
            border-top: 1px solid var(--border-color);
            display: flex;
            justify-content: space-between;
            align-items: center;
            font-size: 0.85rem;
            color: var(--text-light);
        }

        /* ===== 按钮 ===== */
        .btn {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 12px 30px;
            font-size: 0.95rem;
            font-weight: 600;
            border-radius: var(--radius-md);
            border: none;
            cursor: pointer;
            transition: background var(--transition), transform var(--transition), box-shadow var(--transition);
            text-decoration: none;
            line-height: 1.4;
        }
        .btn:focus-visible {
            outline: 3px solid var(--accent);
            outline-offset: 2px;
        }
        .btn-primary {
            background: var(--accent);
            color: var(--primary-dark);
            box-shadow: 0 4px 14px rgba(240, 180, 41, 0.3);
        }
        .btn-primary:hover {
            background: var(--accent-light);
            transform: translateY(-2px);
            box-shadow: 0 8px 28px rgba(240, 180, 41, 0.4);
            color: var(--primary-dark);
        }
        .btn-outline {
            background: transparent;
            color: var(--primary);
            border: 2px solid var(--primary);
        }
        .btn-outline:hover {
            background: var(--primary);
            color: #fff;
            transform: translateY(-2px);
        }
        .btn-white {
            background: #fff;
            color: var(--primary-dark);
            box-shadow: 0 4px 14px rgba(0, 0, 0, 0.08);
        }
        .btn-white:hover {
            background: var(--accent-light);
            transform: translateY(-2px);
            box-shadow: 0 8px 28px rgba(0, 0, 0, 0.12);
            color: var(--primary-dark);
        }
        .btn-lg {
            padding: 16px 40px;
            font-size: 1.05rem;
            border-radius: var(--radius-lg);
        }

        /* ===== 标签 / 徽章 ===== */
        .badge {
            display: inline-block;
            padding: 4px 16px;
            border-radius: 100px;
            font-size: 0.78rem;
            font-weight: 600;
            background: rgba(11, 43, 92, 0.06);
            color: var(--primary-light);
        }
        .badge-accent {
            background: rgba(240, 180, 41, 0.18);
            color: var(--accent-dark);
        }
        .badge-green {
            background: rgba(72, 187, 120, 0.15);
            color: #2f855a;
        }

        /* ===== 安全特性列表 ===== */
        .feature-list {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
            gap: 24px;
        }
        .feature-item {
            display: flex;
            gap: 18px;
            background: var(--bg-card);
            padding: 24px 28px;
            border-radius: var(--radius-md);
            box-shadow: var(--shadow-sm);
            border: 1px solid var(--border-color);
            transition: transform var(--transition), box-shadow var(--transition);
        }
        .feature-item:hover {
            transform: translateY(-2px);
            box-shadow: var(--shadow-md);
        }
        .feature-icon {
            flex-shrink: 0;
            width: 52px;
            height: 52px;
            border-radius: var(--radius-md);
            background: rgba(11, 43, 92, 0.06);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.5rem;
            color: var(--primary);
        }
        .feature-item h4 {
            font-size: 1.05rem;
            font-weight: 700;
            margin-bottom: 4px;
        }
        .feature-item p {
            font-size: 0.9rem;
            color: var(--text-secondary);
            margin-bottom: 0;
        }

        /* ===== 安全认证徽标行 ===== */
        .cert-grid {
            display: flex;
            flex-wrap: wrap;
            gap: 32px;
            justify-content: center;
            align-items: center;
            padding: 20px 0;
        }
        .cert-item {
            display: flex;
            flex-direction: column;
            align-items: center;
            gap: 8px;
            padding: 16px 24px;
            background: rgba(255, 255, 255, 0.05);
            border-radius: var(--radius-md);
            border: 1px solid rgba(255, 255, 255, 0.08);
            min-width: 120px;
            transition: background var(--transition), border-color var(--transition);
        }
        .cert-item:hover {
            background: rgba(255, 255, 255, 0.08);
            border-color: rgba(240, 180, 41, 0.3);
        }
        .cert-item i {
            font-size: 2.2rem;
            color: var(--accent);
        }
        .cert-item span {
            font-size: 0.85rem;
            color: rgba(255, 255, 255, 0.8);
            font-weight: 500;
        }

        /* ===== 时间线 ===== */
        .timeline {
            position: relative;
            max-width: 800px;
            margin: 0 auto;
            padding: 20px 0;
        }
        .timeline::before {
            content: '';
            position: absolute;
            top: 0;
            bottom: 0;
            left: 28px;
            width: 3px;
            background: var(--border-color);
            border-radius: 4px;
        }
        .timeline-item {
            position: relative;
            padding-left: 72px;
            padding-bottom: 36px;
        }
        .timeline-item:last-child {
            padding-bottom: 0;
        }
        .timeline-item .tl-icon {
            position: absolute;
            left: 12px;
            top: 2px;
            width: 34px;
            height: 34px;
            background: var(--accent);
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            color: var(--primary-dark);
            font-size: 0.9rem;
            font-weight: 700;
            box-shadow: 0 2px 8px rgba(240, 180, 41, 0.3);
            z-index: 2;
        }
        .timeline-item h4 {
            font-size: 1.05rem;
            font-weight: 700;
            margin-bottom: 4px;
        }
        .timeline-item p {
            font-size: 0.9rem;
            color: var(--text-secondary);
            margin-bottom: 0;
        }

        /* ===== FAQ ===== */
        .faq-grid {
            max-width: 800px;
            margin: 0 auto;
            display: flex;
            flex-direction: column;
            gap: 12px;
        }
        .faq-item {
            background: var(--bg-card);
            border-radius: var(--radius-md);
            box-shadow: var(--shadow-sm);
            border: 1px solid var(--border-color);
            overflow: hidden;
            transition: box-shadow var(--transition);
        }
        .faq-item:hover {
            box-shadow: var(--shadow-md);
        }
        .faq-question {
            padding: 20px 28px;
            font-weight: 600;
            font-size: 1.02rem;
            cursor: pointer;
            display: flex;
            justify-content: space-between;
            align-items: center;
            background: none;
            border: none;
            width: 100%;
            text-align: left;
            color: var(--text-primary);
            transition: background var(--transition);
        }
        .faq-question:hover {
            background: rgba(11, 43, 92, 0.02);
        }
        .faq-question i {
            transition: transform var(--transition);
            color: var(--text-light);
            font-size: 0.9rem;
        }
        .faq-item.open .faq-question i {
            transform: rotate(180deg);
        }
        .faq-answer {
            padding: 0 28px 20px;
            display: none;
            font-size: 0.95rem;
            color: var(--text-secondary);
            line-height: 1.7;
        }
        .faq-item.open .faq-answer {
            display: block;
        }

        /* ===== CTA ===== */
        .cta-section {
            background: var(--primary);
            background-image: linear-gradient(135deg, var(--primary-dark) 0%, var(--primary-light) 100%);
            padding: 80px 0;
            text-align: center;
            color: #fff;
        }
        .cta-section h2 {
            font-size: 2rem;
            font-weight: 800;
            color: #fff;
            margin-bottom: 16px;
        }
        .cta-section p {
            color: rgba(255, 255, 255, 0.8);
            max-width: 560px;
            margin: 0 auto 28px;
            font-size: 1.05rem;
        }
        .cta-section .btn-wrap {
            display: flex;
            justify-content: center;
            gap: 16px;
            flex-wrap: wrap;
        }

        /* ===== 页脚 ===== */
        .site-footer {
            background: var(--bg-dark);
            color: rgba(255, 255, 255, 0.8);
            padding: 60px 0 28px;
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 1.5fr 1fr 1fr 1fr;
            gap: 40px;
            margin-bottom: 36px;
        }
        .footer-brand .logo-link {
            font-size: 1.4rem;
            color: #fff;
            margin-bottom: 12px;
            display: inline-flex;
        }
        .footer-brand p {
            color: rgba(255, 255, 255, 0.6);
            font-size: 0.9rem;
            max-width: 320px;
            line-height: 1.7;
        }
        .footer-social a {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 38px;
            height: 38px;
            border-radius: 50%;
            background: rgba(255, 255, 255, 0.08);
            color: rgba(255, 255, 255, 0.7);
            font-size: 1.1rem;
            transition: background var(--transition), color var(--transition), transform var(--transition);
            margin-right: 8px;
        }
        .footer-social a:hover {
            background: var(--accent);
            color: var(--primary-dark);
            transform: translateY(-2px);
        }
        .footer-col h4 {
            font-size: 1rem;
            font-weight: 700;
            color: #fff;
            margin-bottom: 16px;
        }
        .footer-col ul li {
            margin-bottom: 10px;
            font-size: 0.9rem;
            color: rgba(255, 255, 255, 0.6);
        }
        .footer-col ul li a {
            color: rgba(255, 255, 255, 0.6);
            transition: color var(--transition);
        }
        .footer-col ul li a:hover {
            color: var(--accent);
        }
        .footer-bottom {
            border-top: 1px solid rgba(255, 255, 255, 0.08);
            padding-top: 24px;
            display: flex;
            justify-content: space-between;
            align-items: center;
            font-size: 0.85rem;
            color: rgba(255, 255, 255, 0.5);
            flex-wrap: wrap;
            gap: 12px;
        }
        .footer-bottom a {
            color: rgba(255, 255, 255, 0.6);
        }
        .footer-bottom a:hover {
            color: var(--accent);
        }

        /* ===== 响应式断点 ===== */
        @media screen and (max-width: 1024px) {
            .card-grid-4 {
                grid-template-columns: repeat(2, 1fr);
            }
            .footer-grid {
                grid-template-columns: 1fr 1fr;
                gap: 32px;
            }
            .category-hero h1 {
                font-size: 2.4rem;
            }
        }

        @media screen and (max-width: 768px) {
            .nav-left,
            .nav-right {
                display: none !important;
            }
            .nav-toggle {
                display: block;
            }
            .mobile-drawer {
                display: flex;
            }
            .header-inner {
                justify-content: space-between;
            }
            .logo-wrap {
                position: static;
                transform: none;
            }
            .logo-link {
                font-size: 1.25rem;
            }
            .logo-icon {
                width: 32px;
                height: 32px;
                font-size: 1.1rem;
            }
            .category-hero {
                padding: 70px 0 60px;
            }
            .category-hero h1 {
                font-size: 1.8rem;
            }
            .category-hero .hero-stats {
                gap: 20px;
            }
            .category-hero .hero-stats .stat-number {
                font-size: 1.5rem;
            }
            .section {
                padding: 50px 0;
            }
            .section-title {
                font-size: 1.6rem;
            }
            .card-grid-3,
            .card-grid-4 {
                grid-template-columns: 1fr;
            }
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 28px;
            }
            .footer-bottom {
                flex-direction: column;
                text-align: center;
            }
            .feature-item {
                flex-direction: column;
                align-items: flex-start;
                padding: 20px;
            }
            .cert-grid {
                gap: 16px;
            }
            .cert-item {
                min-width: 100px;
                padding: 12px 16px;
            }
            .timeline::before {
                left: 18px;
            }
            .timeline-item {
                padding-left: 54px;
            }
            .timeline-item .tl-icon {
                left: 4px;
                width: 28px;
                height: 28px;
                font-size: 0.75rem;
            }
            .cta-section h2 {
                font-size: 1.5rem;
            }
            .btn-lg {
                padding: 14px 28px;
                font-size: 0.95rem;
            }
        }

        @media screen and (max-width: 520px) {
            .category-hero h1 {
                font-size: 1.5rem;
            }
            .category-hero .hero-desc {
                font-size: 0.95rem;
            }
            .card-body {
                padding: 16px 18px 20px;
            }
            .faq-question {
                padding: 16px 18px;
                font-size: 0.92rem;
            }
            .faq-answer {
                padding: 0 18px 16px;
                font-size: 0.88rem;
            }
            .cert-item {
                min-width: 80px;
                padding: 10px 12px;
            }
            .cert-item i {
                font-size: 1.6rem;
            }
        }

        /* ===== 辅助 ===== */
        .flex-center {
            display: flex;
            align-items: center;
            justify-content: center;
        }
        .gap-8 {
            gap: 8px;
        }
        .gap-16 {
            gap: 16px;
        }
        .mt-16 {
            margin-top: 16px;
        }
        .mt-24 {
            margin-top: 24px;
        }
        .mt-40 {
            margin-top: 40px;
        }
        .mb-0 {
            margin-bottom: 0;
        }
        .w-full {
            width: 100%;
        }
        .sr-only {
            position: absolute;
            width: 1px;
            height: 1px;
            padding: 0;
            margin: -1px;
            overflow: hidden;
            clip: rect(0, 0, 0, 0);
            border: 0;
        }