/* roulang page: index */
:root {
        --primary: #1a2a6c;
        --primary-light: #2d4a9e;
        --primary-dark: #0d1b3e;
        --accent: #c9a84c;
        --accent-light: #dfc06a;
        --accent-dark: #a8882e;
        --bg: #f8f9fc;
        --bg-white: #ffffff;
        --bg-dark: #0d1b3e;
        --text: #1a1a2e;
        --text-light: #6b7280;
        --text-white: #ffffff;
        --border: #e5e7eb;
        --radius: 12px;
        --radius-sm: 8px;
        --radius-lg: 20px;
        --shadow: 0 4px 24px rgba(26,42,108,0.08);
        --shadow-lg: 0 12px 48px rgba(26,42,108,0.15);
        --shadow-accent: 0 4px 20px rgba(201,168,76,0.3);
        --transition: all 0.3s cubic-bezier(0.4,0,0.2,1);
        --max-width: 1200px;
        --header-height: 72px;
        --font-sans: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    }
    *, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
    html { scroll-behavior: smooth; }
    body { font-family: var(--font-sans); color: var(--text); background: var(--bg); line-height: 1.6; -webkit-font-smoothing: antialiased; }
    a { color: var(--primary); text-decoration: none; transition: var(--transition); }
    a:hover { color: var(--accent); }
    img { max-width: 100%; height: auto; display: block; }
    button, input, select, textarea { font-family: inherit; font-size: inherit; outline: none; }
    .container { width: 100%; max-width: var(--max-width); margin: 0 auto; padding: 0 24px; }
    .section { padding: 80px 0; }
    .section-title { font-size: 2.2rem; font-weight: 800; color: var(--primary-dark); text-align: center; margin-bottom: 16px; line-height: 1.25; }
    .section-subtitle { font-size: 1.1rem; color: var(--text-light); text-align: center; max-width: 640px; margin: 0 auto 48px; line-height: 1.7; }
    .text-center { text-align: center; }
    .badge { display: inline-block; background: rgba(201,168,76,0.12); color: var(--accent-dark); font-size: 0.8rem; font-weight: 600; padding: 4px 14px; border-radius: 20px; letter-spacing: 0.3px; }
    .badge-primary { background: rgba(26,42,108,0.08); color: var(--primary); }
    .btn { display: inline-flex; align-items: center; gap: 8px; padding: 12px 28px; border-radius: var(--radius-sm); font-weight: 600; font-size: 1rem; border: none; cursor: pointer; transition: var(--transition); text-decoration: none; }
    .btn-primary { background: var(--accent); color: var(--primary-dark); box-shadow: var(--shadow-accent); }
    .btn-primary:hover { background: var(--accent-light); transform: translateY(-2px); box-shadow: 0 8px 30px rgba(201,168,76,0.4); color: var(--primary-dark); }
    .btn-outline { background: transparent; color: var(--text-white); border: 2px solid rgba(255,255,255,0.3); }
    .btn-outline:hover { background: rgba(255,255,255,0.1); border-color: var(--accent); color: var(--accent); transform: translateY(-2px); }
    .btn-lg { padding: 16px 36px; font-size: 1.1rem; border-radius: var(--radius); }
    .card { background: var(--bg-white); border-radius: var(--radius); box-shadow: var(--shadow); padding: 32px; transition: var(--transition); border: 1px solid var(--border); }
    .card:hover { transform: translateY(-4px); box-shadow: var(--shadow-lg); }

    /* ===== Header & Nav ===== */
    .site-header { position: fixed; top: 0; left: 0; right: 0; z-index: 1000; background: rgba(255,255,255,0.92); backdrop-filter: blur(16px); -webkit-backdrop-filter: blur(16px); border-bottom: 1px solid rgba(229,231,235,0.5); height: var(--header-height); }
    .header-inner { display: flex; align-items: center; justify-content: space-between; height: var(--header-height); }
    .logo { font-size: 1.4rem; font-weight: 800; color: var(--primary-dark); display: flex; align-items: center; gap: 10px; text-decoration: none; }
    .logo-icon { width: 36px; height: 36px; background: var(--primary); border-radius: var(--radius-sm); display: flex; align-items: center; justify-content: center; color: var(--accent); font-size: 1.1rem; }
    .logo span { color: var(--accent); }
    .nav-main { display: flex; align-items: center; gap: 32px; }
    .nav-main a { font-size: 0.95rem; font-weight: 500; color: var(--text); padding: 6px 0; position: relative; text-decoration: none; }
    .nav-main a::after { content: ''; position: absolute; bottom: -2px; left: 0; width: 0; height: 2px; background: var(--accent); transition: var(--transition); border-radius: 2px; }
    .nav-main a:hover { color: var(--primary); }
    .nav-main a:hover::after { width: 100%; }
    .nav-main a.active { color: var(--primary); font-weight: 600; }
    .nav-main a.active::after { width: 100%; background: var(--primary); }
    .header-actions { display: flex; align-items: center; gap: 16px; }
    .search-toggle { width: 40px; height: 40px; border-radius: 50%; border: 1px solid var(--border); background: transparent; display: flex; align-items: center; justify-content: center; cursor: pointer; color: var(--text-light); transition: var(--transition); font-size: 1rem; }
    .search-toggle:hover { background: var(--bg); color: var(--primary); border-color: var(--primary); }
    .header-cta { padding: 10px 22px; border-radius: var(--radius-sm); background: var(--accent); color: var(--primary-dark); font-weight: 600; font-size: 0.9rem; border: none; cursor: pointer; transition: var(--transition); text-decoration: none; }
    .header-cta:hover { background: var(--accent-light); transform: translateY(-1px); color: var(--primary-dark); }
    .mobile-toggle { display: none; width: 40px; height: 40px; border: none; background: transparent; cursor: pointer; flex-direction: column; align-items: center; justify-content: center; gap: 5px; }
    .mobile-toggle span { display: block; width: 22px; height: 2px; background: var(--text); border-radius: 2px; transition: var(--transition); }

    /* ===== Hero ===== */
    .hero { padding: 140px 0 100px; background: var(--primary-dark); position: relative; overflow: hidden; min-height: 600px; display: flex; align-items: center; }
    .hero-bg { position: absolute; inset: 0; background: url('/assets/images/backpic/back-1.png') center center / cover no-repeat; opacity: 0.2; }
    .hero-overlay { position: absolute; inset: 0; background: linear-gradient(135deg, rgba(13,27,62,0.92) 0%, rgba(26,42,108,0.7) 100%); }
    .hero-content { position: relative; z-index: 2; max-width: 720px; }
    .hero-badge { display: inline-block; background: rgba(201,168,76,0.15); color: var(--accent); font-size: 0.85rem; font-weight: 600; padding: 6px 18px; border-radius: 20px; margin-bottom: 24px; border: 1px solid rgba(201,168,76,0.2); }
    .hero-title { font-size: 3.2rem; font-weight: 800; color: var(--text-white); line-height: 1.15; margin-bottom: 20px; }
    .hero-title span { color: var(--accent); }
    .hero-desc { font-size: 1.15rem; color: rgba(255,255,255,0.75); line-height: 1.8; margin-bottom: 36px; max-width: 580px; }
    .hero-actions { display: flex; gap: 16px; flex-wrap: wrap; }
    .hero-stats { display: flex; gap: 48px; margin-top: 56px; padding-top: 32px; border-top: 1px solid rgba(255,255,255,0.08); }
    .hero-stat { text-align: left; }
    .hero-stat-num { font-size: 2rem; font-weight: 800; color: var(--accent); }
    .hero-stat-label { font-size: 0.85rem; color: rgba(255,255,255,0.5); margin-top: 4px; }

    /* ===== Features ===== */
    .features-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 28px; }
    .feature-card { text-align: center; padding: 40px 28px; }
    .feature-icon { width: 64px; height: 64px; border-radius: 16px; background: rgba(26,42,108,0.06); display: flex; align-items: center; justify-content: center; margin: 0 auto 20px; font-size: 1.6rem; color: var(--primary); transition: var(--transition); }
    .feature-card:hover .feature-icon { background: var(--primary); color: var(--accent); transform: scale(1.05); }
    .feature-title { font-size: 1.2rem; font-weight: 700; color: var(--primary-dark); margin-bottom: 10px; }
    .feature-desc { font-size: 0.95rem; color: var(--text-light); line-height: 1.65; }

    /* ===== Categories ===== */
    .categories { background: var(--bg-white); }
    .category-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 28px; }
    .category-card { display: flex; align-items: center; gap: 24px; padding: 28px; border-radius: var(--radius); background: var(--bg); border: 1px solid var(--border); transition: var(--transition); text-decoration: none; }
    .category-card:hover { transform: translateY(-2px); box-shadow: var(--shadow); border-color: var(--accent); }
    .category-img { width: 100px; height: 100px; border-radius: var(--radius-sm); object-fit: cover; flex-shrink: 0; }
    .category-info h3 { font-size: 1.1rem; font-weight: 700; color: var(--primary-dark); margin-bottom: 6px; }
    .category-info p { font-size: 0.9rem; color: var(--text-light); line-height: 1.5; }
    .category-tag { display: inline-block; margin-top: 10px; font-size: 0.8rem; font-weight: 600; color: var(--accent-dark); background: rgba(201,168,76,0.1); padding: 2px 12px; border-radius: 12px; }

    /* ===== Latest Posts ===== */
    .posts-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 28px; }
    .post-card { overflow: hidden; padding: 0; }
    .post-img { width: 100%; height: 200px; object-fit: cover; }
    .post-body { padding: 24px; }
    .post-cat { display: inline-block; font-size: 0.75rem; font-weight: 600; color: var(--accent-dark); background: rgba(201,168,76,0.1); padding: 3px 12px; border-radius: 12px; margin-bottom: 10px; }
    .post-title { font-size: 1.1rem; font-weight: 700; color: var(--primary-dark); margin-bottom: 8px; line-height: 1.4; display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden; }
    .post-title a { color: inherit; text-decoration: none; }
    .post-title a:hover { color: var(--accent); }
    .post-excerpt { font-size: 0.9rem; color: var(--text-light); line-height: 1.6; display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden; margin-bottom: 12px; }
    .post-meta { font-size: 0.8rem; color: var(--text-light); display: flex; align-items: center; gap: 12px; }
    .post-meta i { color: var(--accent); width: 14px; }
    .empty-posts { grid-column: 1 / -1; text-align: center; padding: 48px; color: var(--text-light); font-size: 1.05rem; background: var(--bg); border-radius: var(--radius); border: 1px dashed var(--border); }

    /* ===== How It Works ===== */
    .how-works { background: var(--bg-white); }
    .steps-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 28px; position: relative; }
    .step-card { text-align: center; position: relative; }
    .step-num { width: 56px; height: 56px; border-radius: 50%; background: var(--primary); color: var(--accent); display: flex; align-items: center; justify-content: center; font-size: 1.4rem; font-weight: 800; margin: 0 auto 20px; position: relative; z-index: 2; }
    .step-card::after { content: ''; position: absolute; top: 28px; left: 60%; width: 80%; height: 2px; background: var(--border); z-index: 1; }
    .step-card:last-child::after { display: none; }
    .step-title { font-size: 1.1rem; font-weight: 700; color: var(--primary-dark); margin-bottom: 8px; }
    .step-desc { font-size: 0.9rem; color: var(--text-light); line-height: 1.6; }

    /* ===== FAQ ===== */
    .faq-list { max-width: 760px; margin: 0 auto; display: flex; flex-direction: column; gap: 12px; }
    .faq-item { border: 1px solid var(--border); border-radius: var(--radius); overflow: hidden; background: var(--bg-white); transition: var(--transition); }
    .faq-item:hover { border-color: var(--accent); }
    .faq-question { width: 100%; padding: 20px 28px; background: none; border: none; text-align: left; font-size: 1.05rem; font-weight: 600; color: var(--primary-dark); cursor: pointer; display: flex; justify-content: space-between; align-items: center; gap: 16px; }
    .faq-question i { color: var(--accent); transition: var(--transition); font-size: 0.9rem; }
    .faq-item.active .faq-question i { transform: rotate(180deg); }
    .faq-answer { max-height: 0; overflow: hidden; transition: max-height 0.3s ease; padding: 0 28px; }
    .faq-item.active .faq-answer { max-height: 300px; padding: 0 28px 20px; }
    .faq-answer p { font-size: 0.95rem; color: var(--text-light); line-height: 1.7; }

    /* ===== CTA ===== */
    .cta-section { background: var(--primary-dark); position: relative; overflow: hidden; }
    .cta-bg { position: absolute; inset: 0; background: url('/assets/images/backpic/back-2.png') center center / cover no-repeat; opacity: 0.1; }
    .cta-content { position: relative; z-index: 2; text-align: center; max-width: 600px; margin: 0 auto; }
    .cta-title { font-size: 2.2rem; font-weight: 800; color: var(--text-white); margin-bottom: 16px; }
    .cta-desc { font-size: 1.05rem; color: rgba(255,255,255,0.7); margin-bottom: 32px; line-height: 1.7; }
    .cta-actions { display: flex; gap: 16px; justify-content: center; flex-wrap: wrap; }

    /* ===== Footer ===== */
    .site-footer { background: var(--bg-dark); padding: 60px 0 0; color: rgba(255,255,255,0.6); }
    .footer-grid { display: grid; grid-template-columns: 2fr 1fr 1fr 1fr; gap: 40px; padding-bottom: 40px; border-bottom: 1px solid rgba(255,255,255,0.06); }
    .footer-brand .logo { color: var(--text-white); margin-bottom: 16px; }
    .footer-brand .logo span { color: var(--accent); }
    .footer-desc { font-size: 0.9rem; line-height: 1.7; max-width: 320px; }
    .footer-col h4 { font-size: 1rem; font-weight: 700; color: var(--text-white); margin-bottom: 16px; }
    .footer-col a { display: block; font-size: 0.9rem; color: rgba(255,255,255,0.5); padding: 4px 0; text-decoration: none; transition: var(--transition); }
    .footer-col a:hover { color: var(--accent); padding-left: 4px; }
    .footer-bottom { padding: 20px 0; text-align: center; font-size: 0.85rem; color: rgba(255,255,255,0.35); }
    .footer-bottom a { color: rgba(255,255,255,0.5); text-decoration: none; }
    .footer-bottom a:hover { color: var(--accent); }

    /* ===== Responsive ===== */
    @media (max-width: 1024px) {
        .features-grid { grid-template-columns: repeat(2, 1fr); }
        .posts-grid { grid-template-columns: repeat(2, 1fr); }
        .steps-grid { grid-template-columns: repeat(2, 1fr); }
        .step-card::after { display: none; }
        .footer-grid { grid-template-columns: repeat(2, 1fr); }
        .hero-title { font-size: 2.6rem; }
    }
    @media (max-width: 768px) {
        .nav-main { display: none; }
        .mobile-toggle { display: flex; }
        .header-actions .search-toggle { display: none; }
        .hero { padding: 120px 0 60px; min-height: auto; }
        .hero-title { font-size: 2rem; }
        .hero-desc { font-size: 1rem; }
        .hero-stats { gap: 24px; flex-wrap: wrap; }
        .hero-stat-num { font-size: 1.5rem; }
        .section { padding: 56px 0; }
        .section-title { font-size: 1.6rem; }
        .features-grid { grid-template-columns: 1fr; }
        .category-grid { grid-template-columns: 1fr; }
        .posts-grid { grid-template-columns: 1fr; }
        .steps-grid { grid-template-columns: 1fr; gap: 32px; }
        .footer-grid { grid-template-columns: 1fr; gap: 32px; }
        .cta-title { font-size: 1.6rem; }
        .hero-actions { flex-direction: column; align-items: flex-start; }
        .cta-actions { flex-direction: column; align-items: center; }
        .header-cta { display: none; }
    }
    @media (max-width: 520px) {
        .container { padding: 0 16px; }
        .hero-title { font-size: 1.6rem; }
        .section-title { font-size: 1.4rem; }
        .card { padding: 20px; }
        .category-card { flex-direction: column; text-align: center; }
        .category-img { width: 80px; height: 80px; }
        .logo { font-size: 1.1rem; }
        .logo-icon { width: 30px; height: 30px; font-size: 0.9rem; }
    }

    /* Mobile nav overlay */
    .mobile-nav-overlay { position: fixed; inset: 0; background: rgba(0,0,0,0.5); z-index: 999; display: none; opacity: 0; transition: opacity 0.3s; }
    .mobile-nav-overlay.show { display: block; opacity: 1; }
    .mobile-nav-panel { position: fixed; top: 0; right: -280px; width: 280px; height: 100%; background: var(--bg-white); z-index: 1001; padding: 24px; transition: right 0.3s; box-shadow: -4px 0 24px rgba(0,0,0,0.1); }
    .mobile-nav-panel.open { right: 0; }
    .mobile-nav-panel .mobile-nav-close { width: 36px; height: 36px; border: none; background: var(--bg); border-radius: 50%; font-size: 1.2rem; cursor: pointer; margin-bottom: 24px; display: flex; align-items: center; justify-content: center; }
    .mobile-nav-panel a { display: block; padding: 12px 0; font-size: 1rem; font-weight: 500; color: var(--text); border-bottom: 1px solid var(--border); text-decoration: none; }
    .mobile-nav-panel a.active { color: var(--primary); font-weight: 700; }
    .mobile-nav-panel .mobile-cta { margin-top: 24px; display: block; text-align: center; padding: 14px; background: var(--accent); color: var(--primary-dark); border-radius: var(--radius-sm); font-weight: 600; border: none; }

/* roulang page: article */
/* ===== Design Variables ===== */
        :root {
            --primary: #1a3a5c;
            --primary-light: #2a5a8c;
            --primary-dark: #0f2440;
            --accent: #d4a843;
            --accent-light: #e8c56d;
            --accent-dark: #b88d2e;
            --bg-body: #f7f5f2;
            --bg-white: #ffffff;
            --bg-card: #ffffff;
            --bg-light: #f0ede8;
            --bg-dark: #1a1a2e;
            --text: #1e1e2a;
            --text-light: #5a5a6a;
            --text-muted: #8a8a9a;
            --border: #e0dcd6;
            --border-light: #f0ece6;
            --radius: 12px;
            --radius-sm: 8px;
            --radius-lg: 20px;
            --shadow-sm: 0 2px 8px rgba(0,0,0,0.04);
            --shadow: 0 8px 30px rgba(0,0,0,0.06);
            --shadow-lg: 0 20px 60px rgba(0,0,0,0.08);
            --shadow-accent: 0 8px 30px rgba(212,168,67,0.2);
            --transition: 0.25s cubic-bezier(0.4,0,0.2,1);
            --font: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
            --container: 1200px;
            --header-h: 72px;
        }

        /* ===== Reset & Base ===== */
        *, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
        html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }
        body {
            font-family: var(--font);
            font-size: 16px;
            line-height: 1.7;
            color: var(--text);
            background: var(--bg-body);
            -webkit-font-smoothing: antialiased;
        }
        a { color: var(--primary-light); text-decoration: none; transition: var(--transition); }
        a:hover { color: var(--accent); }
        img { max-width: 100%; height: auto; display: block; border-radius: var(--radius-sm); }
        button, input, textarea, select { font-family: inherit; font-size: 1rem; outline: none; }
        ul, ol { list-style: none; }
        h1, h2, h3, h4, h5, h6 { line-height: 1.25; font-weight: 600; color: var(--primary-dark); }
        h1 { font-size: 2.4rem; }
        h2 { font-size: 1.8rem; }
        h3 { font-size: 1.4rem; }
        h4 { font-size: 1.15rem; }

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

        /* ===== Header / Nav ===== */
        .site-header {
            position: sticky;
            top: 0;
            z-index: 100;
            background: rgba(255,255,255,0.92);
            backdrop-filter: blur(16px);
            -webkit-backdrop-filter: blur(16px);
            border-bottom: 1px solid var(--border-light);
            height: var(--header-h);
            display: flex;
            align-items: center;
        }
        .site-header .container {
            display: flex;
            align-items: center;
            justify-content: space-between;
            width: 100%;
        }
        .logo {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 1.5rem;
            font-weight: 700;
            color: var(--primary-dark);
            letter-spacing: -0.3px;
        }
        .logo .logo-icon {
            color: var(--accent);
            font-size: 1.6rem;
        }
        .logo span { color: var(--accent); font-weight: 400; }
        .logo:hover { color: var(--primary-dark); }

        .nav-main {
            display: flex;
            align-items: center;
            gap: 32px;
        }
        .nav-main a {
            font-size: 0.95rem;
            font-weight: 500;
            color: var(--text-light);
            padding: 6px 0;
            position: relative;
            transition: var(--transition);
        }
        .nav-main a::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 0;
            width: 0;
            height: 2px;
            background: var(--accent);
            transition: var(--transition);
            border-radius: 2px;
        }
        .nav-main a:hover { color: var(--primary); }
        .nav-main a:hover::after { width: 100%; }
        .nav-main a.active { color: var(--primary); font-weight: 600; }
        .nav-main a.active::after { width: 100%; }

        .nav-actions {
            display: flex;
            align-items: center;
            gap: 16px;
        }
        .search-box {
            display: flex;
            align-items: center;
            background: var(--bg-light);
            border-radius: 40px;
            padding: 0 16px;
            height: 40px;
            border: 1px solid transparent;
            transition: var(--transition);
            min-width: 200px;
        }
        .search-box:focus-within {
            border-color: var(--accent);
            background: var(--bg-white);
            box-shadow: 0 0 0 4px rgba(212,168,67,0.1);
        }
        .search-box i { color: var(--text-muted); font-size: 0.9rem; margin-right: 8px; }
        .search-box input {
            border: none;
            background: transparent;
            color: var(--text);
            height: 100%;
            width: 100%;
            font-size: 0.9rem;
        }
        .search-box input::placeholder { color: var(--text-muted); }

        .btn-cta {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            background: linear-gradient(135deg, var(--accent), var(--accent-dark));
            color: #fff !important;
            padding: 10px 24px;
            border-radius: 40px;
            font-weight: 600;
            font-size: 0.9rem;
            border: none;
            cursor: pointer;
            transition: var(--transition);
            box-shadow: var(--shadow-accent);
            text-decoration: none !important;
        }
        .btn-cta:hover {
            transform: translateY(-2px);
            box-shadow: 0 12px 40px rgba(212,168,67,0.35);
            color: #fff !important;
        }
        .btn-cta i { font-size: 0.85rem; }

        .menu-toggle {
            display: none;
            background: none;
            border: none;
            font-size: 1.6rem;
            color: var(--text);
            cursor: pointer;
            padding: 4px;
        }

        /* ===== Mobile Nav ===== */
        .mobile-nav {
            display: none;
            position: fixed;
            top: var(--header-h);
            left: 0;
            right: 0;
            background: rgba(255,255,255,0.98);
            backdrop-filter: blur(16px);
            -webkit-backdrop-filter: blur(16px);
            border-bottom: 1px solid var(--border);
            padding: 20px 24px;
            flex-direction: column;
            gap: 16px;
            box-shadow: var(--shadow-lg);
            z-index: 99;
        }
        .mobile-nav.open { display: flex; }
        .mobile-nav a {
            font-size: 1.05rem;
            font-weight: 500;
            color: var(--text);
            padding: 8px 0;
            border-bottom: 1px solid var(--border-light);
        }
        .mobile-nav a.active { color: var(--accent); font-weight: 600; }
        .mobile-nav a:last-child { border-bottom: none; }

        /* ===== Article Hero ===== */
        .article-hero {
            background: linear-gradient(135deg, var(--primary-dark) 0%, var(--primary) 60%, var(--primary-light) 100%);
            padding: 60px 0 50px;
            position: relative;
            overflow: hidden;
        }
        .article-hero::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;
        }
        .article-hero .container {
            position: relative;
            z-index: 2;
        }
        .article-hero .breadcrumb {
            display: flex;
            align-items: center;
            gap: 8px;
            font-size: 0.85rem;
            color: rgba(255,255,255,0.6);
            margin-bottom: 20px;
        }
        .article-hero .breadcrumb a { color: rgba(255,255,255,0.7); }
        .article-hero .breadcrumb a:hover { color: var(--accent-light); }
        .article-hero .breadcrumb i { font-size: 0.7rem; color: rgba(255,255,255,0.4); }
        .article-hero h1 {
            font-size: 2.2rem;
            font-weight: 700;
            color: #fff;
            max-width: 800px;
            line-height: 1.3;
            margin-bottom: 16px;
        }
        .article-meta {
            display: flex;
            flex-wrap: wrap;
            gap: 20px;
            align-items: center;
            color: rgba(255,255,255,0.75);
            font-size: 0.9rem;
        }
        .article-meta .meta-item {
            display: flex;
            align-items: center;
            gap: 6px;
        }
        .article-meta .meta-item i { font-size: 0.8rem; }
        .article-meta .tag {
            background: rgba(212,168,67,0.2);
            color: var(--accent-light);
            padding: 2px 14px;
            border-radius: 20px;
            font-size: 0.8rem;
            font-weight: 500;
        }

        /* ===== Article Content ===== */
        .article-section {
            padding: 50px 0 60px;
        }
        .article-layout {
            display: grid;
            grid-template-columns: 1fr 300px;
            gap: 48px;
            align-items: start;
        }
        .article-body {
            background: var(--bg-white);
            border-radius: var(--radius);
            padding: 40px 44px;
            box-shadow: var(--shadow);
            border: 1px solid var(--border-light);
        }
        .article-body .content {
            font-size: 1.05rem;
            line-height: 1.85;
            color: var(--text);
        }
        .article-body .content p {
            margin-bottom: 1.2em;
        }
        .article-body .content h2 {
            font-size: 1.5rem;
            margin-top: 1.8em;
            margin-bottom: 0.6em;
            color: var(--primary);
        }
        .article-body .content h3 {
            font-size: 1.2rem;
            margin-top: 1.4em;
            margin-bottom: 0.5em;
            color: var(--primary-light);
        }
        .article-body .content ul, .article-body .content ol {
            padding-left: 1.6em;
            margin-bottom: 1.2em;
        }
        .article-body .content li {
            margin-bottom: 0.4em;
            list-style: disc;
        }
        .article-body .content a {
            color: var(--accent-dark);
            text-decoration: underline;
            text-underline-offset: 2px;
        }
        .article-body .content a:hover { color: var(--primary); }
        .article-body .content img {
            border-radius: var(--radius-sm);
            margin: 1.5em 0;
            box-shadow: var(--shadow-sm);
        }
        .article-body .content blockquote {
            border-left: 4px solid var(--accent);
            padding: 12px 20px;
            margin: 1.2em 0;
            background: var(--bg-light);
            border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
            color: var(--text-light);
            font-style: italic;
        }
        .article-footer-nav {
            display: flex;
            justify-content: space-between;
            align-items: center;
            margin-top: 40px;
            padding-top: 24px;
            border-top: 1px solid var(--border-light);
        }
        .article-footer-nav a {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            font-weight: 500;
            color: var(--primary);
        }
        .article-footer-nav a:hover { color: var(--accent); }

        /* ===== Sidebar ===== */
        .article-sidebar {
            display: flex;
            flex-direction: column;
            gap: 28px;
        }
        .sidebar-card {
            background: var(--bg-white);
            border-radius: var(--radius);
            padding: 28px;
            box-shadow: var(--shadow);
            border: 1px solid var(--border-light);
        }
        .sidebar-card h3 {
            font-size: 1.1rem;
            margin-bottom: 16px;
            color: var(--primary);
            display: flex;
            align-items: center;
            gap: 8px;
        }
        .sidebar-card h3 i { color: var(--accent); }
        .sidebar-card .side-list {
            display: flex;
            flex-direction: column;
            gap: 12px;
        }
        .sidebar-card .side-list a {
            display: flex;
            align-items: flex-start;
            gap: 10px;
            font-size: 0.92rem;
            color: var(--text);
            padding: 8px 0;
            border-bottom: 1px solid var(--border-light);
            transition: var(--transition);
        }
        .sidebar-card .side-list a:last-child { border-bottom: none; }
        .sidebar-card .side-list a:hover { color: var(--accent); padding-left: 4px; }
        .sidebar-card .side-list a i { color: var(--accent); font-size: 0.75rem; margin-top: 4px; flex-shrink: 0; }
        .sidebar-cta {
            background: linear-gradient(135deg, var(--primary-dark), var(--primary));
            color: #fff;
            border: none;
        }
        .sidebar-cta h3 { color: #fff; }
        .sidebar-cta h3 i { color: var(--accent-light); }
        .sidebar-cta p { color: rgba(255,255,255,0.8); font-size: 0.92rem; margin-bottom: 18px; }
        .sidebar-cta .btn-cta { width: 100%; justify-content: center; }

        /* ===== Not Found ===== */
        .not-found-block {
            text-align: center;
            padding: 60px 20px;
        }
        .not-found-block i { font-size: 3.5rem; color: var(--text-muted); margin-bottom: 20px; display: block; }
        .not-found-block h2 { font-size: 1.6rem; margin-bottom: 12px; }
        .not-found-block p { color: var(--text-light); margin-bottom: 24px; }
        .not-found-block .btn-cta { display: inline-flex; }

        /* ===== Footer ===== */
        .site-footer {
            background: var(--primary-dark);
            color: rgba(255,255,255,0.75);
            padding: 48px 0 28px;
        }
        .site-footer a { color: rgba(255,255,255,0.7); }
        .site-footer a:hover { color: var(--accent-light); }
        .footer-grid {
            display: grid;
            grid-template-columns: 1.8fr 1fr 1fr 1fr;
            gap: 40px;
            margin-bottom: 36px;
        }
        .footer-brand .logo { color: #fff; margin-bottom: 14px; }
        .footer-brand .logo span { color: var(--accent-light); }
        .footer-desc { font-size: 0.9rem; line-height: 1.7; color: rgba(255,255,255,0.6); max-width: 320px; }
        .footer-col h4 {
            font-size: 0.95rem;
            font-weight: 600;
            color: #fff;
            margin-bottom: 16px;
        }
        .footer-col a {
            display: block;
            font-size: 0.88rem;
            padding: 5px 0;
            transition: var(--transition);
        }
        .footer-col a:hover { padding-left: 4px; }
        .footer-bottom {
            border-top: 1px solid rgba(255,255,255,0.08);
            padding-top: 22px;
            font-size: 0.84rem;
            color: rgba(255,255,255,0.45);
            display: flex;
            flex-wrap: wrap;
            justify-content: space-between;
            gap: 12px;
        }
        .footer-bottom a { color: rgba(255,255,255,0.5); }
        .footer-bottom a:hover { color: var(--accent-light); }

        /* ===== Responsive ===== */
        @media (max-width: 1024px) {
            .article-layout { grid-template-columns: 1fr; }
            .article-sidebar { display: grid; grid-template-columns: 1fr 1fr; gap: 20px; }
            .footer-grid { grid-template-columns: 1fr 1fr; }
        }
        @media (max-width: 768px) {
            .nav-main { display: none; }
            .nav-actions .search-box { display: none; }
            .menu-toggle { display: block; }
            .article-hero h1 { font-size: 1.6rem; }
            .article-body { padding: 24px 20px; }
            .article-sidebar { grid-template-columns: 1fr; }
            .footer-grid { grid-template-columns: 1fr; gap: 28px; }
            .article-hero { padding: 40px 0 36px; }
        }
        @media (max-width: 520px) {
            .container { padding: 0 16px; }
            .article-hero h1 { font-size: 1.35rem; }
            .article-meta { font-size: 0.8rem; gap: 12px; }
            .article-body { padding: 18px 14px; }
            .btn-cta { padding: 8px 18px; font-size: 0.85rem; }
            .logo { font-size: 1.2rem; }
        }

        /* ===== Utility ===== */
        .text-accent { color: var(--accent); }
        .mt-2 { margin-top: 8px; }
        .mb-2 { margin-bottom: 8px; }
        .gap-4 { gap: 16px; }

/* roulang page: category1 */
/* ===== 设计变量 ===== */
        :root {
            --primary: #1a3a5c;
            --primary-light: #2a5a8c;
            --primary-dark: #0f2440;
            --accent: #d4a843;
            --accent-light: #e8c86a;
            --accent-dark: #b8892e;
            --bg-body: #f8f9fc;
            --bg-white: #ffffff;
            --bg-card: #ffffff;
            --bg-dark: #0f2440;
            --bg-soft: #eef2f7;
            --text-primary: #1a2a3a;
            --text-secondary: #4a5a6a;
            --text-muted: #7a8a9a;
            --text-white: #ffffff;
            --text-accent: #d4a843;
            --border-color: #e2e8f0;
            --border-light: #f0f2f5;
            --shadow-sm: 0 2px 8px rgba(0,0,0,0.06);
            --shadow-md: 0 6px 24px rgba(0,0,0,0.08);
            --shadow-lg: 0 12px 40px rgba(0,0,0,0.12);
            --shadow-xl: 0 20px 60px rgba(0,0,0,0.15);
            --radius-sm: 8px;
            --radius-md: 12px;
            --radius-lg: 16px;
            --radius-xl: 20px;
            --radius-full: 50%;
            --max-width: 1200px;
            --header-height: 72px;
            --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, 'Noto Sans SC', sans-serif;
            --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
            --transition-slow: all 0.5s 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-text-size-adjust: 100%; }
        body {
            font-family: var(--font-sans);
            font-size: 16px;
            line-height: 1.7;
            color: var(--text-primary);
            background: var(--bg-body);
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
        }
        img { max-width: 100%; height: auto; display: block; border-radius: var(--radius-sm); }
        a { color: var(--primary-light); text-decoration: none; transition: var(--transition); }
        a:hover { color: var(--accent); }
        button { cursor: pointer; font-family: inherit; border: none; background: none; transition: var(--transition); }
        input, textarea, select { font-family: inherit; font-size: 1rem; border: 1px solid var(--border-color); border-radius: var(--radius-sm); padding: 10px 16px; outline: none; transition: var(--transition); background: var(--bg-white); color: var(--text-primary); }
        input:focus, textarea:focus { border-color: var(--accent); box-shadow: 0 0 0 3px rgba(212,168,67,0.15); }
        ul, ol { list-style: none; }
        h1, h2, h3, h4, h5, h6 { line-height: 1.3; font-weight: 700; color: var(--text-primary); }
        h1 { font-size: 2.75rem; letter-spacing: -0.02em; }
        h2 { font-size: 2rem; letter-spacing: -0.01em; }
        h3 { font-size: 1.35rem; }
        h4 { font-size: 1.1rem; }
        p { margin-bottom: 1rem; color: var(--text-secondary); }
        .container { max-width: var(--max-width); margin: 0 auto; padding: 0 24px; }
        .section { padding: 80px 0; }
        .section-title { text-align: center; margin-bottom: 16px; }
        .section-subtitle { text-align: center; font-size: 1.1rem; color: var(--text-muted); max-width: 640px; margin: 0 auto 48px; }
        .text-center { text-align: center; }
        .badge {
            display: inline-block; padding: 4px 14px; border-radius: 20px; font-size: 0.8rem;
            font-weight: 600; letter-spacing: 0.3px; text-transform: uppercase;
            background: var(--bg-soft); color: var(--primary);
        }
        .badge-accent { background: rgba(212,168,67,0.15); color: var(--accent-dark); }
        .badge-primary { background: rgba(26,58,92,0.1); color: var(--primary); }
        .divider { width: 60px; height: 3px; background: var(--accent); border-radius: 3px; margin: 16px auto 24px; }

        /* ===== Header & Nav ===== */
        .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 var(--border-light); transition: var(--transition);
        }
        .site-header .container {
            display: flex; align-items: center; justify-content: space-between;
            height: 100%; max-width: var(--max-width);
        }
        .logo {
            display: flex; align-items: center; gap: 6px;
            font-size: 1.35rem; font-weight: 800; color: var(--primary); white-space: nowrap;
        }
        .logo .logo-icon { color: var(--accent); font-size: 1.5rem; }
        .logo span { color: var(--accent); font-weight: 700; }
        .logo:hover { color: var(--primary); opacity: 0.9; }
        .nav-main { display: flex; align-items: center; gap: 8px; }
        .nav-main a {
            padding: 8px 18px; border-radius: var(--radius-sm);
            font-size: 0.92rem; font-weight: 600; color: var(--text-secondary);
            transition: var(--transition); position: relative; white-space: nowrap;
        }
        .nav-main a:hover { color: var(--primary); background: var(--bg-soft); }
        .nav-main a.active { color: var(--primary); background: rgba(26,58,92,0.08); }
        .nav-main a.active::after {
            content: ''; position: absolute; bottom: 2px; left: 50%; transform: translateX(-50%);
            width: 20px; height: 2px; background: var(--accent); border-radius: 2px;
        }
        .header-actions { display: flex; align-items: center; gap: 12px; }
        .search-box {
            display: flex; align-items: center; background: var(--bg-soft);
            border-radius: var(--radius-full); padding: 0 16px; gap: 8px;
            border: 1px solid transparent; transition: var(--transition);
        }
        .search-box:focus-within { border-color: var(--accent); background: var(--bg-white); box-shadow: 0 0 0 3px rgba(212,168,67,0.1); }
        .search-box input { border: none; background: transparent; padding: 8px 0; width: 160px; font-size: 0.88rem; color: var(--text-primary); }
        .search-box input::placeholder { color: var(--text-muted); }
        .search-box i { color: var(--text-muted); font-size: 0.9rem; }
        .btn {
            display: inline-flex; align-items: center; justify-content: center; gap: 8px;
            padding: 10px 24px; border-radius: var(--radius-sm); font-weight: 600;
            font-size: 0.92rem; transition: var(--transition); white-space: nowrap;
            border: 2px solid transparent;
        }
        .btn-primary { background: var(--accent); color: var(--primary-dark); border-color: var(--accent); }
        .btn-primary:hover { background: var(--accent-light); color: var(--primary-dark); transform: translateY(-2px); box-shadow: 0 8px 24px rgba(212,168,67,0.35); }
        .btn-outline { background: transparent; color: var(--primary); border-color: var(--primary); }
        .btn-outline:hover { background: var(--primary); color: var(--text-white); transform: translateY(-2px); }
        .btn-white { background: var(--text-white); color: var(--primary); border-color: var(--text-white); }
        .btn-white:hover { background: var(--bg-soft); transform: translateY(-2px); box-shadow: 0 8px 24px rgba(255,255,255,0.3); }
        .btn-lg { padding: 14px 36px; font-size: 1.05rem; border-radius: var(--radius-md); }
        .menu-toggle { display: none; font-size: 1.5rem; color: var(--primary); padding: 8px; }

        /* ===== Hero / Banner ===== */
        .page-banner {
            position: relative; padding: 120px 0 80px; margin-top: var(--header-height);
            background: linear-gradient(135deg, var(--primary-dark) 0%, var(--primary) 60%, var(--primary-light) 100%);
            overflow: hidden; min-height: 320px; display: flex; align-items: center;
        }
        .page-banner::before {
            content: ''; position: absolute; inset: 0;
            background: url('/assets/images/backpic/back-1.png') center center / cover no-repeat;
            opacity: 0.15; mix-blend-mode: overlay;
        }
        .page-banner::after {
            content: ''; position: absolute; bottom: -2px; left: 0; right: 0;
            height: 80px; background: linear-gradient(to top, var(--bg-body), transparent);
        }
        .page-banner .container { position: relative; z-index: 2; text-align: center; }
        .page-banner .badge { background: rgba(212,168,67,0.2); color: var(--accent-light); }
        .page-banner h1 { color: var(--text-white); font-size: 2.8rem; margin-bottom: 16px; }
        .page-banner p { color: rgba(255,255,255,0.8); font-size: 1.1rem; max-width: 640px; margin: 0 auto; }
        .breadcrumb {
            display: flex; align-items: center; justify-content: center; gap: 8px;
            margin-bottom: 20px; font-size: 0.88rem; color: rgba(255,255,255,0.6);
        }
        .breadcrumb a { color: rgba(255,255,255,0.7); }
        .breadcrumb a:hover { color: var(--accent-light); }
        .breadcrumb i { font-size: 0.7rem; }

        /* ===== 登录方式卡片 ===== */
        .methods-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 28px; }
        .method-card {
            background: var(--bg-card); border-radius: var(--radius-lg);
            padding: 36px 28px; box-shadow: var(--shadow-sm);
            border: 1px solid var(--border-color); transition: var(--transition);
            text-align: center; position: relative; overflow: hidden;
        }
        .method-card:hover { transform: translateY(-6px); box-shadow: var(--shadow-lg); border-color: var(--accent); }
        .method-card .icon-wrap {
            width: 64px; height: 64px; border-radius: var(--radius-md);
            background: rgba(212,168,67,0.12); display: flex; align-items: center; justify-content: center;
            margin: 0 auto 20px; font-size: 1.8rem; color: var(--accent-dark); transition: var(--transition);
        }
        .method-card:hover .icon-wrap { background: var(--accent); color: var(--text-white); }
        .method-card h3 { font-size: 1.2rem; margin-bottom: 10px; }
        .method-card p { font-size: 0.92rem; color: var(--text-muted); margin-bottom: 16px; }
        .method-card .tag {
            display: inline-block; padding: 2px 12px; border-radius: 20px;
            font-size: 0.78rem; font-weight: 600; background: var(--bg-soft); color: var(--text-secondary);
        }
        .method-card .tag.hot { background: rgba(212,168,67,0.15); color: var(--accent-dark); }

        /* ===== 流程步骤 ===== */
        .process-steps { display: grid; grid-template-columns: repeat(4, 1fr); gap: 20px; position: relative; }
        .process-steps::before {
            content: ''; position: absolute; top: 40px; left: 10%; right: 10%;
            height: 2px; background: linear-gradient(to right, var(--accent), var(--border-color));
            z-index: 0;
        }
        .step-item { text-align: center; position: relative; z-index: 1; }
        .step-number {
            width: 56px; height: 56px; border-radius: var(--radius-full);
            background: var(--bg-white); border: 3px solid var(--accent);
            display: flex; align-items: center; justify-content: center;
            margin: 0 auto 16px; font-size: 1.3rem; font-weight: 800; color: var(--accent-dark);
            transition: var(--transition); box-shadow: 0 0 0 4px var(--bg-body);
        }
        .step-item:hover .step-number { background: var(--accent); color: var(--text-white); transform: scale(1.1); }
        .step-item h4 { font-size: 1rem; margin-bottom: 6px; }
        .step-item p { font-size: 0.88rem; color: var(--text-muted); margin: 0; }

        /* ===== 安全建议卡片 ===== */
        .safety-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 24px; }
        .safety-card {
            display: flex; gap: 20px; background: var(--bg-card);
            border-radius: var(--radius-md); padding: 28px 24px;
            box-shadow: var(--shadow-sm); border: 1px solid var(--border-color);
            transition: var(--transition);
        }
        .safety-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-md); }
        .safety-card .icon-box {
            width: 48px; height: 48px; min-width: 48px; border-radius: var(--radius-sm);
            background: rgba(212,168,67,0.1); display: flex; align-items: center; justify-content: center;
            font-size: 1.3rem; color: var(--accent-dark);
        }
        .safety-card h4 { font-size: 1rem; margin-bottom: 6px; }
        .safety-card p { font-size: 0.9rem; color: var(--text-muted); margin: 0; }

        /* ===== FAQ ===== */
        .faq-list { max-width: 780px; margin: 0 auto; display: flex; flex-direction: column; gap: 12px; }
        .faq-item {
            background: var(--bg-card); border-radius: var(--radius-md);
            border: 1px solid var(--border-color); overflow: hidden;
            transition: var(--transition);
        }
        .faq-item:hover { border-color: var(--accent); box-shadow: var(--shadow-sm); }
        .faq-question {
            display: flex; align-items: center; justify-content: space-between;
            padding: 20px 24px; font-weight: 600; font-size: 1rem;
            color: var(--text-primary); cursor: pointer; gap: 12px;
        }
        .faq-question i { color: var(--accent); font-size: 0.85rem; transition: var(--transition); }
        .faq-item.active .faq-question i { transform: rotate(180deg); }
        .faq-answer {
            padding: 0 24px 20px; font-size: 0.92rem; color: var(--text-secondary);
            line-height: 1.7; display: none;
        }
        .faq-item.active .faq-answer { display: block; }

        /* ===== CTA ===== */
        .cta-section {
            background: linear-gradient(135deg, var(--primary-dark), var(--primary));
            position: relative; overflow: hidden;
        }
        .cta-section::before {
            content: ''; position: absolute; inset: 0;
            background: url('/assets/images/backpic/back-2.png') center center / cover no-repeat;
            opacity: 0.08; mix-blend-mode: overlay;
        }
        .cta-section .container { position: relative; z-index: 2; text-align: center; padding: 80px 24px; }
        .cta-section h2 { color: var(--text-white); font-size: 2.2rem; margin-bottom: 16px; }
        .cta-section p { color: rgba(255,255,255,0.75); font-size: 1.05rem; max-width: 560px; margin: 0 auto 32px; }

        /* ===== Footer ===== */
        .site-footer {
            background: var(--primary-dark); color: rgba(255,255,255,0.7);
            padding: 60px 0 0; border-top: 3px solid var(--accent);
        }
        .footer-grid { display: grid; grid-template-columns: 2fr 1fr 1fr 1fr; gap: 40px; margin-bottom: 40px; }
        .footer-brand .logo { color: var(--text-white); font-size: 1.25rem; margin-bottom: 12px; }
        .footer-brand .logo span { color: var(--accent); }
        .footer-desc { font-size: 0.9rem; color: rgba(255,255,255,0.55); line-height: 1.7; margin-top: 12px; max-width: 320px; }
        .footer-col h4 { color: var(--text-white); font-size: 1rem; margin-bottom: 16px; font-weight: 700; }
        .footer-col a {
            display: block; color: rgba(255,255,255,0.55); font-size: 0.9rem;
            padding: 5px 0; transition: var(--transition);
        }
        .footer-col a:hover { color: var(--accent); padding-left: 4px; }
        .footer-bottom {
            border-top: 1px solid rgba(255,255,255,0.08);
            padding: 20px 0; text-align: center;
            font-size: 0.85rem; color: rgba(255,255,255,0.4);
        }
        .footer-bottom a { color: rgba(255,255,255,0.5); }
        .footer-bottom a:hover { color: var(--accent); }

        /* ===== 响应式 ===== */
        @media (max-width: 1024px) {
            .methods-grid { grid-template-columns: repeat(2, 1fr); }
            .process-steps { grid-template-columns: repeat(2, 1fr); }
            .process-steps::before { display: none; }
            .footer-grid { grid-template-columns: 1fr 1fr; }
            .search-box input { width: 120px; }
            h1 { font-size: 2.2rem; }
            h2 { font-size: 1.7rem; }
            .page-banner h1 { font-size: 2.2rem; }
        }
        @media (max-width: 768px) {
            :root { --header-height: 64px; }
            .nav-main { display: none; }
            .menu-toggle { display: block; }
            .header-actions .search-box { display: none; }
            .header-actions .btn { padding: 8px 16px; font-size: 0.85rem; }
            .site-header .container { padding: 0 16px; }
            .section { padding: 56px 0; }
            .page-banner { padding: 100px 0 60px; min-height: 260px; }
            .page-banner h1 { font-size: 1.8rem; }
            .methods-grid { grid-template-columns: 1fr; }
            .safety-grid { grid-template-columns: 1fr; }
            .process-steps { grid-template-columns: 1fr 1fr; gap: 24px; }
            .footer-grid { grid-template-columns: 1fr; gap: 24px; }
            .cta-section .container { padding: 56px 16px; }
            .cta-section h2 { font-size: 1.6rem; }
            .footer-brand .footer-desc { max-width: 100%; }
            .faq-question { font-size: 0.92rem; padding: 16px 18px; }
            .faq-answer { padding: 0 18px 16px; }
        }
        @media (max-width: 520px) {
            .page-banner h1 { font-size: 1.5rem; }
            .process-steps { grid-template-columns: 1fr; }
            .section-title { font-size: 1.4rem; }
            .logo { font-size: 1.1rem; }
            .btn-lg { padding: 12px 28px; font-size: 0.95rem; }
            .method-card { padding: 24px 18px; }
            .safety-card { flex-direction: column; text-align: center; align-items: center; }
        }

        /* ===== 移动端下拉菜单 ===== */
        .mobile-menu {
            display: none; position: fixed; top: var(--header-height); left: 0; right: 0;
            background: rgba(255,255,255,0.98); backdrop-filter: blur(20px);
            border-bottom: 1px solid var(--border-color); z-index: 999;
            padding: 16px 24px; box-shadow: var(--shadow-md);
        }
        .mobile-menu.open { display: block; }
        .mobile-menu a {
            display: block; padding: 12px 0; font-size: 1rem; font-weight: 600;
            color: var(--text-secondary); border-bottom: 1px solid var(--border-light);
        }
        .mobile-menu a:last-child { border-bottom: none; }
        .mobile-menu a.active { color: var(--primary); }
        .mobile-menu a:hover { color: var(--accent); }

        /* ===== 动画 ===== */
        .fade-up { opacity: 0; transform: translateY(30px); transition: var(--transition-slow); }
        .fade-up.visible { opacity: 1; transform: translateY(0); }
        @keyframes pulse { 0%, 100% { transform: scale(1); } 50% { transform: scale(1.05); } }
        .pulse { animation: pulse 2s ease-in-out infinite; }