/* roulang page: index */
/* ===== Design Variables ===== */
        :root {
            --primary: #1a2a4a;
            --primary-light: #2c4a7a;
            --primary-dark: #0f1a2e;
            --accent: #c8a45c;
            --accent-light: #e0c078;
            --accent-dark: #a88844;
            --bg: #f8f7f4;
            --bg-alt: #efede8;
            --bg-card: #ffffff;
            --bg-dark: #1a2a4a;
            --text: #1e1e1e;
            --text-light: #5a5a5a;
            --text-muted: #8a8a8a;
            --text-on-dark: #f0ede8;
            --text-on-accent: #1a1a1a;
            --border: #e0ddd6;
            --border-light: #f0eee8;
            --radius-sm: 4px;
            --radius-md: 10px;
            --radius-lg: 18px;
            --radius-xl: 26px;
            --shadow-sm: 0 2px 8px rgba(26,42,74,0.04);
            --shadow-md: 0 6px 24px rgba(26,42,74,0.08);
            --shadow-lg: 0 16px 48px rgba(26,42,74,0.12);
            --shadow-xl: 0 24px 64px rgba(26,42,74,0.16);
            --spacing-xs: 0.375rem;
            --spacing-sm: 0.75rem;
            --spacing-md: 1.5rem;
            --spacing-lg: 3rem;
            --spacing-xl: 5rem;
            --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
            --font-serif: 'Noto Serif SC', Georgia, 'Times New Roman', 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-sans);
            font-size: 1rem;
            line-height: 1.7;
            color: var(--text);
            background: var(--bg);
            min-height: 100vh;
        }
        img { max-width: 100%; height: auto; display: block; }
        a { color: var(--primary-light); text-decoration: none; transition: color var(--transition); }
        a:hover { color: var(--accent); }
        a:focus-visible { outline: 2px solid var(--accent); outline-offset: 2px; border-radius: var(--radius-sm); }
        button, input, select, textarea { font-family: inherit; font-size: inherit; }
        button { cursor: pointer; border: none; background: none; }
        ul, ol { list-style: none; }
        h1, h2, h3, h4, h5, h6 { line-height: 1.25; font-weight: 600; color: var(--primary); }

        /* ===== Utility ===== */
        .container { max-width: 1200px; margin: 0 auto; padding: 0 var(--spacing-md); }
        .text-center { text-align: center; }
        .text-accent { color: var(--accent); }
        .text-muted { color: var(--text-muted); }
        .section-padding { padding: var(--spacing-xl) 0; }
        .section-padding-sm { padding: var(--spacing-lg) 0; }
        .section-title {
            font-size: 2.25rem;
            font-weight: 700;
            color: var(--primary);
            margin-bottom: 0.5rem;
            letter-spacing: -0.02em;
        }
        .section-subtitle {
            font-size: 1.1rem;
            color: var(--text-light);
            max-width: 640px;
            margin: 0 auto var(--spacing-lg);
            line-height: 1.7;
        }
        .divider {
            width: 54px;
            height: 3px;
            background: var(--accent);
            border-radius: 4px;
            margin: 1rem auto 1.5rem;
        }
        .divider-left { margin: 1rem 0 1.5rem; }

        /* ===== Buttons ===== */
        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 0.5rem;
            padding: 0.75rem 2rem;
            font-weight: 500;
            font-size: 0.95rem;
            border-radius: 50px;
            transition: all var(--transition);
            border: 2px solid transparent;
            letter-spacing: 0.01em;
            line-height: 1.4;
        }
        .btn:focus-visible { outline: 2px solid var(--accent); outline-offset: 3px; }
        .btn-primary {
            background: var(--accent);
            color: var(--text-on-accent);
            border-color: var(--accent);
        }
        .btn-primary:hover {
            background: var(--accent-dark);
            border-color: var(--accent-dark);
            color: var(--text-on-accent);
            transform: translateY(-2px);
            box-shadow: 0 8px 24px rgba(200,164,92,0.35);
        }
        .btn-primary:active {
            transform: translateY(0);
            box-shadow: 0 2px 8px rgba(200,164,92,0.25);
        }
        .btn-outline {
            background: transparent;
            color: var(--primary);
            border-color: var(--primary);
        }
        .btn-outline:hover {
            background: var(--primary);
            color: #fff;
            transform: translateY(-2px);
            box-shadow: 0 8px 24px rgba(26,42,74,0.2);
        }
        .btn-outline:active {
            transform: translateY(0);
            box-shadow: 0 2px 8px rgba(26,42,74,0.1);
        }
        .btn-light {
            background: rgba(255,255,255,0.15);
            color: #fff;
            border-color: rgba(255,255,255,0.3);
            backdrop-filter: blur(4px);
        }
        .btn-light:hover {
            background: rgba(255,255,255,0.25);
            border-color: rgba(255,255,255,0.5);
            color: #fff;
            transform: translateY(-2px);
        }
        .btn-sm { padding: 0.5rem 1.25rem; font-size: 0.85rem; }

        /* ===== Navigation — 极简高端文字导航 ===== */
        .site-header {
            position: sticky;
            top: 0;
            z-index: 100;
            background: rgba(255,255,255,0.92);
            backdrop-filter: blur(12px);
            border-bottom: 1px solid var(--border-light);
            transition: box-shadow var(--transition);
        }
        .site-header.scrolled { box-shadow: var(--shadow-sm); }
        .header-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 68px;
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 var(--spacing-md);
        }
        .logo {
            font-size: 1.3rem;
            font-weight: 700;
            color: var(--primary);
            letter-spacing: 0.02em;
            transition: opacity var(--transition);
            display: flex;
            align-items: center;
            gap: 0.4rem;
        }
        .logo:hover { opacity: 0.8; color: var(--primary); }
        .logo-dot {
            display: inline-block;
            width: 8px;
            height: 8px;
            background: var(--accent);
            border-radius: 50%;
            margin-right: 0.15rem;
        }
        .nav-links {
            display: flex;
            align-items: center;
            gap: 2rem;
        }
        .nav-links a {
            font-size: 0.9rem;
            font-weight: 450;
            color: var(--text-light);
            padding: 0.25rem 0;
            position: relative;
            transition: color var(--transition);
            letter-spacing: 0.01em;
        }
        .nav-links a::after {
            content: '';
            position: absolute;
            bottom: -2px;
            left: 50%;
            transform: translateX(-50%) scaleX(0);
            width: 70%;
            height: 2px;
            background: var(--accent);
            border-radius: 4px;
            transition: transform var(--transition);
        }
        .nav-links a:hover { color: var(--primary); }
        .nav-links a:hover::after { transform: translateX(-50%) scaleX(1); }
        .nav-links a.active {
            color: var(--primary);
            font-weight: 600;
        }
        .nav-links a.active::after {
            transform: translateX(-50%) scaleX(1);
            background: var(--accent);
        }
        .nav-cta {
            background: var(--accent);
            color: var(--text-on-accent) !important;
            padding: 0.45rem 1.4rem !important;
            border-radius: 50px;
            font-weight: 500 !important;
            transition: all var(--transition) !important;
        }
        .nav-cta::after { display: none !important; }
        .nav-cta:hover {
            background: var(--accent-dark) !important;
            color: var(--text-on-accent) !important;
            transform: translateY(-1px);
            box-shadow: 0 4px 16px rgba(200,164,92,0.3);
        }
        .nav-toggle { display: none; flex-direction: column; gap: 5px; cursor: pointer; padding: 4px; }
        .nav-toggle span {
            width: 26px; height: 2px; background: var(--primary);
            border-radius: 4px; transition: all var(--transition);
        }
        .nav-toggle.active span:nth-child(1) { transform: rotate(45deg) translate(5px,5px); }
        .nav-toggle.active span:nth-child(2) { opacity: 0; }
        .nav-toggle.active span:nth-child(3) { transform: rotate(-45deg) translate(5px,-5px); }

        /* ===== Hero ===== */
        .hero {
            background: linear-gradient(135deg, var(--primary-dark) 0%, var(--primary) 50%, var(--primary-light) 100%);
            color: var(--text-on-dark);
            padding: 6rem 0 5rem;
            position: relative;
            overflow: hidden;
            min-height: 70vh;
            display: flex;
            align-items: center;
        }
        .hero::before {
            content: '';
            position: absolute;
            top: -30%;
            right: -15%;
            width: 600px;
            height: 600px;
            background: radial-gradient(circle, rgba(200,164,92,0.15) 0%, transparent 70%);
            border-radius: 50%;
            pointer-events: none;
        }
        .hero::after {
            content: '';
            position: absolute;
            bottom: -20%;
            left: -10%;
            width: 400px;
            height: 400px;
            background: radial-gradient(circle, rgba(200,164,92,0.08) 0%, transparent 70%);
            border-radius: 50%;
            pointer-events: none;
        }
        .hero .container { position: relative; z-index: 1; width: 100%; }
        .hero-badge {
            display: inline-flex;
            align-items: center;
            gap: 0.5rem;
            background: rgba(200,164,92,0.15);
            border: 1px solid rgba(200,164,92,0.25);
            padding: 0.35rem 1.2rem;
            border-radius: 50px;
            font-size: 0.8rem;
            color: var(--accent-light);
            margin-bottom: 1.5rem;
            letter-spacing: 0.04em;
        }
        .hero h1 {
            font-size: 3.5rem;
            font-weight: 700;
            color: #fff;
            line-height: 1.15;
            margin-bottom: 1.25rem;
            letter-spacing: -0.02em;
        }
        .hero h1 span { color: var(--accent); }
        .hero p {
            font-size: 1.15rem;
            color: rgba(240,237,232,0.8);
            max-width: 560px;
            line-height: 1.8;
            margin-bottom: 2.25rem;
        }
        .hero-actions { display: flex; gap: 1rem; flex-wrap: wrap; }
        .hero-stats {
            display: flex;
            gap: 2.5rem;
            margin-top: 3.5rem;
            padding-top: 2.5rem;
            border-top: 1px solid rgba(255,255,255,0.08);
        }
        .hero-stat h3 { font-size: 2rem; color: #fff; font-weight: 700; letter-spacing: -0.01em; }
        .hero-stat h3 small { font-size: 1rem; color: var(--accent-light); font-weight: 400; }
        .hero-stat p { font-size: 0.85rem; color: rgba(240,237,232,0.6); margin-bottom: 0; }

        /* ===== Cards & Grids ===== */
        .card {
            background: var(--bg-card);
            border-radius: var(--radius-md);
            padding: 2rem;
            box-shadow: var(--shadow-sm);
            border: 1px solid var(--border-light);
            transition: all var(--transition);
        }
        .card:hover {
            box-shadow: var(--shadow-md);
            transform: translateY(-4px);
            border-color: var(--border);
        }
        .card-icon {
            width: 52px;
            height: 52px;
            border-radius: var(--radius-sm);
            background: rgba(200,164,92,0.1);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.5rem;
            color: var(--accent);
            margin-bottom: 1.25rem;
            transition: background var(--transition);
        }
        .card:hover .card-icon { background: rgba(200,164,92,0.18); }
        .card h3 { font-size: 1.2rem; font-weight: 600; margin-bottom: 0.5rem; }
        .card p { font-size: 0.92rem; color: var(--text-light); line-height: 1.65; }
        .card-link { margin-top: 1rem; display: inline-flex; align-items: center; gap: 0.35rem; font-weight: 500; font-size: 0.9rem; color: var(--primary-light); transition: gap var(--transition); }
        .card-link:hover { gap: 0.65rem; color: var(--accent); }

        /* ===== Category Cards (special) ===== */
        .category-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: var(--spacing-md);
        }
        .category-card {
            background: var(--bg-card);
            border-radius: var(--radius-md);
            padding: 2.25rem 2rem;
            border: 1px solid var(--border-light);
            box-shadow: var(--shadow-sm);
            transition: all var(--transition);
            position: relative;
            overflow: hidden;
        }
        .category-card::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            height: 3px;
            background: var(--accent);
            transform: scaleX(0);
            transform-origin: left;
            transition: transform var(--transition);
        }
        .category-card:hover::before { transform: scaleX(1); }
        .category-card:hover {
            box-shadow: var(--shadow-md);
            transform: translateY(-4px);
            border-color: var(--border);
        }
        .category-card .cat-icon {
            width: 44px;
            height: 44px;
            border-radius: var(--radius-sm);
            background: rgba(200,164,92,0.08);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.25rem;
            color: var(--accent);
            margin-bottom: 1rem;
        }
        .category-card h3 { font-size: 1.15rem; font-weight: 600; margin-bottom: 0.35rem; }
        .category-card p { font-size: 0.88rem; color: var(--text-light); line-height: 1.6; margin-bottom: 1rem; }
        .category-card .btn { width: 100%; }
        .cat-tag {
            display: inline-block;
            padding: 0.15rem 0.7rem;
            border-radius: 50px;
            font-size: 0.7rem;
            font-weight: 500;
            background: rgba(200,164,92,0.1);
            color: var(--accent-dark);
            margin-bottom: 0.75rem;
            letter-spacing: 0.03em;
        }

        /* ===== Content List ===== */
        .content-list { display: flex; flex-direction: column; gap: 1.25rem; }
        .content-item {
            display: flex;
            align-items: flex-start;
            gap: 1.5rem;
            padding: 1.5rem 1.75rem;
            background: var(--bg-card);
            border-radius: var(--radius-md);
            border: 1px solid var(--border-light);
            transition: all var(--transition);
            box-shadow: var(--shadow-sm);
        }
        .content-item:hover {
            box-shadow: var(--shadow-md);
            border-color: var(--border);
            transform: translateX(4px);
        }
        .content-item .item-index {
            width: 36px;
            height: 36px;
            border-radius: 50%;
            background: rgba(200,164,92,0.1);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 0.85rem;
            font-weight: 600;
            color: var(--accent-dark);
            flex-shrink: 0;
        }
        .content-item .item-body { flex: 1; min-width: 0; }
        .content-item .item-body h4 { font-size: 1.05rem; font-weight: 600; margin-bottom: 0.25rem; }
        .content-item .item-body h4 a { color: var(--primary); }
        .content-item .item-body h4 a:hover { color: var(--accent); }
        .content-item .item-body p { font-size: 0.88rem; color: var(--text-light); line-height: 1.6; margin-bottom: 0.35rem; }
        .content-item .item-meta {
            display: flex;
            gap: 1rem;
            font-size: 0.78rem;
            color: var(--text-muted);
        }
        .content-item .item-meta .cat-badge {
            background: rgba(200,164,92,0.08);
            color: var(--accent-dark);
            padding: 0.1rem 0.6rem;
            border-radius: 50px;
            font-weight: 500;
        }

        /* ===== Features / 流程 ===== */
        .features-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: var(--spacing-md);
        }
        .feature-step {
            text-align: center;
            padding: 2rem 1.25rem;
            background: var(--bg-card);
            border-radius: var(--radius-md);
            border: 1px solid var(--border-light);
            box-shadow: var(--shadow-sm);
            transition: all var(--transition);
            position: relative;
        }
        .feature-step:hover {
            box-shadow: var(--shadow-md);
            transform: translateY(-3px);
        }
        .feature-step .step-num {
            width: 48px;
            height: 48px;
            border-radius: 50%;
            background: var(--primary);
            color: #fff;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.1rem;
            font-weight: 700;
            margin: 0 auto 1rem;
            transition: background var(--transition);
        }
        .feature-step:hover .step-num { background: var(--accent); }
        .feature-step h4 { font-size: 1.05rem; font-weight: 600; margin-bottom: 0.35rem; }
        .feature-step p { font-size: 0.85rem; color: var(--text-light); line-height: 1.6; margin-bottom: 0; }

        /* ===== FAQ ===== */
        .faq-list { max-width: 800px; margin: 0 auto; display: flex; flex-direction: column; gap: 0.75rem; }
        .faq-item {
            background: var(--bg-card);
            border-radius: var(--radius-md);
            border: 1px solid var(--border-light);
            overflow: hidden;
            transition: box-shadow var(--transition);
        }
        .faq-item:hover { box-shadow: var(--shadow-sm); }
        .faq-question {
            width: 100%;
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding: 1.25rem 1.75rem;
            font-size: 1rem;
            font-weight: 500;
            color: var(--primary);
            text-align: left;
            background: none;
            transition: background var(--transition);
            gap: 1rem;
        }
        .faq-question:hover { background: rgba(200,164,92,0.04); }
        .faq-question .faq-icon {
            font-size: 1rem;
            color: var(--accent);
            transition: transform var(--transition);
            flex-shrink: 0;
        }
        .faq-item.open .faq-question .faq-icon { transform: rotate(180deg); }
        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.35s ease, padding 0.35s ease;
            padding: 0 1.75rem;
            color: var(--text-light);
            font-size: 0.92rem;
            line-height: 1.7;
        }
        .faq-item.open .faq-answer {
            max-height: 300px;
            padding: 0 1.75rem 1.25rem;
        }

        /* ===== CTA ===== */
        .cta-section {
            background: var(--primary);
            color: var(--text-on-dark);
            padding: 4.5rem 0;
            position: relative;
            overflow: hidden;
        }
        .cta-section::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            bottom: 0;
            background: radial-gradient(ellipse at 30% 50%, rgba(200,164,92,0.1) 0%, transparent 60%);
            pointer-events: none;
        }
        .cta-section .container { position: relative; z-index: 1; }
        .cta-section h2 { font-size: 2.25rem; font-weight: 700; color: #fff; margin-bottom: 0.75rem; }
        .cta-section p { font-size: 1.05rem; color: rgba(240,237,232,0.7); max-width: 560px; margin: 0 auto 2rem; }
        .cta-actions { display: flex; gap: 1rem; justify-content: center; flex-wrap: wrap; }

        /* ===== Footer ===== */
        .site-footer {
            background: var(--bg-alt);
            border-top: 1px solid var(--border-light);
            padding: 3.5rem 0 2rem;
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr 1fr;
            gap: var(--spacing-lg);
        }
        .footer-brand .logo { font-size: 1.2rem; margin-bottom: 0.75rem; display: inline-flex; }
        .footer-brand p { font-size: 0.88rem; color: var(--text-light); max-width: 320px; line-height: 1.7; }
        .footer-col h4 { font-size: 0.9rem; font-weight: 600; color: var(--primary); margin-bottom: 1rem; text-transform: uppercase; letter-spacing: 0.04em; }
        .footer-col ul { display: flex; flex-direction: column; gap: 0.5rem; }
        .footer-col a { font-size: 0.88rem; color: var(--text-light); transition: color var(--transition); }
        .footer-col a:hover { color: var(--accent); }
        .footer-bottom {
            margin-top: 2.5rem;
            padding-top: 1.5rem;
            border-top: 1px solid var(--border-light);
            display: flex;
            justify-content: space-between;
            align-items: center;
            flex-wrap: wrap;
            gap: 0.75rem;
            font-size: 0.82rem;
            color: var(--text-muted);
        }

        /* ===== Responsive ===== */
        @media (max-width: 1024px) {
            .hero h1 { font-size: 2.75rem; }
            .features-grid { grid-template-columns: repeat(2, 1fr); }
            .footer-grid { grid-template-columns: 1fr 1fr; }
        }
        @media (max-width: 768px) {
            .nav-toggle { display: flex; }
            .nav-links {
                position: absolute;
                top: 68px;
                left: 0;
                right: 0;
                background: rgba(255,255,255,0.98);
                backdrop-filter: blur(12px);
                flex-direction: column;
                padding: 1.5rem 2rem;
                gap: 1.25rem;
                border-bottom: 1px solid var(--border-light);
                box-shadow: var(--shadow-md);
                transform: translateY(-110%);
                opacity: 0;
                transition: all var(--transition);
                pointer-events: none;
            }
            .nav-links.open {
                transform: translateY(0);
                opacity: 1;
                pointer-events: auto;
            }
            .nav-links a { font-size: 1rem; padding: 0.4rem 0; }
            .nav-links a::after { width: 40px; }
            .nav-cta { padding: 0.5rem 1.5rem !important; width: fit-content; }
            .hero { min-height: auto; padding: 4rem 0 3.5rem; }
            .hero h1 { font-size: 2.1rem; }
            .hero p { font-size: 1rem; }
            .hero-stats { gap: 1.5rem; flex-wrap: wrap; }
            .hero-stat h3 { font-size: 1.5rem; }
            .section-title { font-size: 1.75rem; }
            .category-grid { grid-template-columns: 1fr; }
            .features-grid { grid-template-columns: 1fr; }
            .footer-grid { grid-template-columns: 1fr; gap: var(--spacing-md); }
            .content-item { flex-direction: column; gap: 0.75rem; padding: 1.25rem; }
            .content-item .item-index { width: 30px; height: 30px; font-size: 0.75rem; }
            .cta-section h2 { font-size: 1.7rem; }
            .footer-bottom { flex-direction: column; text-align: center; }
        }
        @media (max-width: 520px) {
            .hero h1 { font-size: 1.7rem; }
            .hero-actions { flex-direction: column; width: 100%; }
            .hero-actions .btn { width: 100%; }
            .section-title { font-size: 1.45rem; }
            .card { padding: 1.5rem; }
            .container { padding: 0 1rem; }
            .faq-question { padding: 1rem 1.25rem; font-size: 0.95rem; }
            .faq-answer { padding: 0 1.25rem; font-size: 0.88rem; }
            .faq-item.open .faq-answer { padding: 0 1.25rem 1rem; }
        }

        /* ===== Animations ===== */
        @keyframes fadeInUp { from { opacity: 0; transform: translateY(24px); } to { opacity: 1; transform: translateY(0); } }
        .animate-up { animation: fadeInUp 0.6s ease forwards; }
        .animate-up-delay-1 { animation-delay: 0.15s; }
        .animate-up-delay-2 { animation-delay: 0.3s; }
        .animate-up-delay-3 { animation-delay: 0.45s; }

        /* ===== Misc ===== */
        .badge {
            display: inline-block;
            padding: 0.2rem 0.8rem;
            border-radius: 50px;
            font-size: 0.72rem;
            font-weight: 500;
            background: rgba(200,164,92,0.1);
            color: var(--accent-dark);
        }
        .badge-primary { background: var(--primary); color: #fff; }
        .gap-sm { gap: 0.75rem; }
        .mt-1 { margin-top: 1rem; }
        .mb-0 { margin-bottom: 0; }
        .empty-state {
            text-align: center;
            padding: 2.5rem 1.5rem;
            color: var(--text-muted);
            font-size: 0.95rem;
            background: var(--bg-alt);
            border-radius: var(--radius-md);
        }

/* roulang page: article */
:root {
            --primary: #1a2a6c;
            --primary-light: #2d4a9e;
            --primary-dark: #0f1a3d;
            --secondary: #e8c84a;
            --secondary-light: #f0d86a;
            --accent: #c0392b;
            --bg: #f8f9fc;
            --bg-alt: #eef0f5;
            --bg-card: #ffffff;
            --text: #1a1a2e;
            --text-light: #4a4a6a;
            --text-muted: #8888a0;
            --border: #e2e4ea;
            --border-light: #f0f1f5;
            --radius: 12px;
            --radius-sm: 8px;
            --radius-lg: 20px;
            --shadow: 0 4px 24px rgba(26,42,108,0.08);
            --shadow-hover: 0 12px 40px rgba(26,42,108,0.15);
            --shadow-sm: 0 2px 12px rgba(0,0,0,0.06);
            --transition: 0.3s cubic-bezier(0.4,0,0.2,1);
            --font: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, 'Noto Sans SC', sans-serif;
            --nav-height: 72px;
            --max-width: 1200px;
        }
        *,*::before,*::after{box-sizing:border-box;margin:0;padding:0;}
        html{scroll-behavior:smooth;}
        body{font-family:var(--font);background:var(--bg);color:var(--text);line-height:1.7;font-size:16px;-webkit-font-smoothing:antialiased;}
        a{color:var(--primary);text-decoration:none;transition:color var(--transition);}
        a:hover{color:var(--primary-light);}
        img{max-width:100%;height:auto;display:block;border-radius:var(--radius-sm);}
        .container{max-width:var(--max-width);margin:0 auto;padding:0 24px;}
        @media(max-width:640px){.container{padding:0 16px;}}

        .site-header{background:rgba(255,255,255,0.92);backdrop-filter:blur(20px);-webkit-backdrop-filter:blur(20px);border-bottom:1px solid var(--border-light);position:sticky;top:0;z-index:100;height:var(--nav-height);}
        .header-inner{max-width:var(--max-width);margin:0 auto;padding:0 24px;height:100%;display:flex;align-items:center;justify-content:space-between;}
        .logo{display:flex;align-items:center;gap:10px;font-size:1.35rem;font-weight:700;color:var(--primary);letter-spacing:-0.5px;}
        .logo:hover{color:var(--primary);}
        .logo-dot{display:inline-block;width:10px;height:10px;background:var(--secondary);border-radius:50%;flex-shrink:0;}
        .nav-links{display:flex;align-items:center;gap:28px;}
        .nav-links a{font-size:0.95rem;font-weight:500;color:var(--text-light);position:relative;padding:4px 0;transition:color var(--transition);}
        .nav-links a::after{content:'';position:absolute;bottom:-2px;left:0;width:0;height:2px;background:var(--primary);border-radius:2px;transition:width var(--transition);}
        .nav-links a:hover{color:var(--primary);}
        .nav-links a:hover::after{width:100%;}
        .nav-links a.active{color:var(--primary);}
        .nav-links a.active::after{width:100%;}
        .nav-cta{background:var(--primary);color:#fff!important;padding:8px 22px!important;border-radius:50px;font-weight:600!important;transition:background var(--transition),transform var(--transition)!important;}
        .nav-cta::after{display:none!important;}
        .nav-cta:hover{background:var(--primary-light);color:#fff!important;transform:translateY(-1px);}
        .nav-toggle{display:none;flex-direction:column;gap:5px;cursor:pointer;padding:8px;border-radius:var(--radius-sm);transition:background var(--transition);}
        .nav-toggle:hover{background:var(--bg-alt);}
        .nav-toggle span{display:block;width:24px;height:2px;background:var(--text);border-radius:2px;transition:var(--transition);}
        @media(max-width:860px){
            .nav-links{position:fixed;top:var(--nav-height);left:0;right:0;background:rgba(255,255,255,0.98);backdrop-filter:blur(20px);flex-direction:column;padding:24px 32px;gap:20px;border-bottom:1px solid var(--border);transform:translateY(-120%);opacity:0;pointer-events:none;transition:transform 0.4s ease,opacity 0.4s ease;box-shadow:var(--shadow);}
            .nav-links.open{transform:translateY(0);opacity:1;pointer-events:auto;}
            .nav-toggle{display:flex;}
            .nav-links a{font-size:1.1rem;padding:8px 0;}
            .nav-cta{margin-top:8px;text-align:center;}
        }

        .page-banner{background:linear-gradient(135deg,var(--primary-dark) 0%,var(--primary) 50%,var(--primary-light) 100%);padding:60px 0 50px;position:relative;overflow:hidden;}
        .page-banner::before{content:'';position:absolute;inset:0;background:radial-gradient(circle at 20% 40%,rgba(232,200,74,0.12) 0%,transparent 60%);}
        .page-banner .container{position:relative;z-index:1;}
        .page-banner h1{font-size:2.4rem;font-weight:800;color:#fff;line-height:1.3;margin-bottom:10px;letter-spacing:-0.5px;}
        .page-banner .meta{display:flex;flex-wrap:wrap;gap:16px;color:rgba(255,255,255,0.75);font-size:0.95rem;align-items:center;}
        .page-banner .meta span{display:flex;align-items:center;gap:6px;}
        .page-banner .meta i{font-size:0.85rem;}
        .page-banner .category-badge{background:var(--secondary);color:var(--primary-dark);padding:4px 16px;border-radius:50px;font-size:0.85rem;font-weight:600;display:inline-block;}
        @media(max-width:768px){
            .page-banner{padding:40px 0 32px;}
            .page-banner h1{font-size:1.6rem;}
        }

        .article-section{padding:60px 0 80px;}
        .article-grid{display:grid;grid-template-columns:1fr 320px;gap:48px;}
        .article-main{background:var(--bg-card);border-radius:var(--radius-lg);padding:48px;box-shadow:var(--shadow-sm);border:1px solid var(--border-light);}
        .article-body{font-size:1.05rem;line-height:1.9;color:var(--text);}
        .article-body p{margin-bottom:1.4em;}
        .article-body h2{font-size:1.5rem;font-weight:700;color:var(--primary);margin-top:2em;margin-bottom:0.8em;padding-bottom:8px;border-bottom:2px solid var(--border-light);}
        .article-body h3{font-size:1.2rem;font-weight:700;color:var(--text);margin-top:1.6em;margin-bottom:0.6em;}
        .article-body ul,.article-body ol{padding-left:1.5em;margin-bottom:1.4em;}
        .article-body li{margin-bottom:0.5em;}
        .article-body img{border-radius:var(--radius);margin:1.6em 0;box-shadow:var(--shadow-sm);}
        .article-body blockquote{border-left:4px solid var(--secondary);padding:16px 24px;margin:1.6em 0;background:var(--bg-alt);border-radius:0 var(--radius-sm) var(--radius-sm) 0;color:var(--text-light);font-style:italic;}
        .article-body a{color:var(--primary);text-decoration:underline;text-underline-offset:3px;}
        .article-body a:hover{color:var(--primary-light);}
        .article-footer-bar{display:flex;flex-wrap:wrap;justify-content:space-between;align-items:center;margin-top:48px;padding-top:24px;border-top:1px solid var(--border);}
        .article-tags{display:flex;flex-wrap:wrap;gap:8px;}
        .article-tags .tag{background:var(--bg-alt);color:var(--text-light);padding:4px 14px;border-radius:50px;font-size:0.85rem;font-weight:500;transition:background var(--transition),color var(--transition);}
        .article-tags .tag:hover{background:var(--primary);color:#fff;}
        .article-share{display:flex;gap:10px;align-items:center;}
        .article-share span{font-size:0.9rem;color:var(--text-muted);}
        .article-share a{display:flex;align-items:center;justify-content:center;width:36px;height:36px;border-radius:50%;background:var(--bg-alt);color:var(--text-light);transition:background var(--transition),color var(--transition),transform var(--transition);}
        .article-share a:hover{background:var(--primary);color:#fff;transform:translateY(-2px);}

        .article-sidebar{display:flex;flex-direction:column;gap:32px;}
        .sidebar-card{background:var(--bg-card);border-radius:var(--radius-lg);padding:28px;box-shadow:var(--shadow-sm);border:1px solid var(--border-light);}
        .sidebar-card h3{font-size:1.1rem;font-weight:700;color:var(--primary);margin-bottom:16px;padding-bottom:10px;border-bottom:2px solid var(--border-light);display:flex;align-items:center;gap:8px;}
        .sidebar-card h3 i{color:var(--secondary);}
        .sidebar-list{list-style:none;}
        .sidebar-list li{margin-bottom:12px;}
        .sidebar-list a{display:flex;gap:12px;align-items:flex-start;padding:10px;border-radius:var(--radius-sm);transition:background var(--transition);}
        .sidebar-list a:hover{background:var(--bg-alt);}
        .sidebar-list .s-title{font-size:0.95rem;font-weight:600;color:var(--text);line-height:1.4;}
        .sidebar-list .s-meta{font-size:0.8rem;color:var(--text-muted);margin-top:4px;}
        .sidebar-cta{text-align:center;}
        .sidebar-cta p{font-size:0.95rem;color:var(--text-light);margin-bottom:16px;}
        .sidebar-cta .btn{display:inline-flex;align-items:center;gap:8px;}

        .not-found-card{background:var(--bg-card);border-radius:var(--radius-lg);padding:80px 48px;text-align:center;box-shadow:var(--shadow-sm);border:1px solid var(--border-light);}
        .not-found-card i{font-size:3.6rem;color:var(--text-muted);margin-bottom:20px;}
        .not-found-card h2{font-size:1.8rem;color:var(--text);margin-bottom:12px;}
        .not-found-card p{color:var(--text-light);margin-bottom:24px;}
        .not-found-card .btn{display:inline-flex;align-items:center;gap:8px;}

        .btn{display:inline-flex;align-items:center;gap:8px;padding:12px 28px;border-radius:50px;font-weight:600;font-size:0.95rem;border:none;cursor:pointer;transition:background var(--transition),transform var(--transition),box-shadow var(--transition);}
        .btn-primary{background:var(--primary);color:#fff;}
        .btn-primary:hover{background:var(--primary-light);color:#fff;transform:translateY(-2px);box-shadow:0 8px 24px rgba(26,42,108,0.25);}
        .btn-outline{background:transparent;color:var(--primary);border:2px solid var(--primary);}
        .btn-outline:hover{background:var(--primary);color:#fff;transform:translateY(-2px);}
        .btn-sm{padding:8px 20px;font-size:0.85rem;}

        .site-footer{background:var(--primary-dark);color:rgba(255,255,255,0.8);padding:60px 0 0;}
        .site-footer .container{padding-bottom:0;}
        .footer-grid{display:grid;grid-template-columns:2fr 1fr 1fr 1fr;gap:40px;padding-bottom:40px;border-bottom:1px solid rgba(255,255,255,0.1);}
        .footer-brand p{font-size:0.9rem;line-height:1.7;margin-top:12px;color:rgba(255,255,255,0.6);max-width:360px;}
        .footer-col h4{font-size:1rem;font-weight:700;color:#fff;margin-bottom:18px;letter-spacing:0.5px;}
        .footer-col ul{list-style:none;}
        .footer-col ul li{margin-bottom:10px;}
        .footer-col ul a{color:rgba(255,255,255,0.6);font-size:0.9rem;transition:color var(--transition);}
        .footer-col ul a:hover{color:var(--secondary);}
        .footer-bottom{display:flex;flex-wrap:wrap;justify-content:space-between;padding:24px 0;font-size:0.85rem;color:rgba(255,255,255,0.4);gap:12px;}
        .footer-bottom a{color:rgba(255,255,255,0.5);}
        .footer-bottom a:hover{color:var(--secondary);}
        @media(max-width:860px){
            .footer-grid{grid-template-columns:1fr 1fr;gap:32px;}
            .footer-brand{grid-column:1/-1;}
        }
        @media(max-width:640px){
            .footer-grid{grid-template-columns:1fr;gap:28px;}
            .footer-bottom{flex-direction:column;text-align:center;}
        }

        .breadcrumb{display:flex;flex-wrap:wrap;gap:8px;align-items:center;font-size:0.9rem;color:var(--text-muted);margin-bottom:12px;}
        .breadcrumb a{color:rgba(255,255,255,0.7);}
        .breadcrumb a:hover{color:#fff;}
        .breadcrumb span{color:rgba(255,255,255,0.5);}

        @media(max-width:1024px){
            .article-grid{grid-template-columns:1fr;}
            .article-sidebar{display:grid;grid-template-columns:1fr 1fr;gap:24px;}
        }
        @media(max-width:768px){
            .article-main{padding:24px 20px;}
            .article-sidebar{grid-template-columns:1fr;}
            .article-footer-bar{flex-direction:column;align-items:flex-start;gap:16px;}
        }
        @media(max-width:520px){
            .page-banner h1{font-size:1.3rem;}
            .article-body{font-size:0.98rem;}
        }

        .related-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px;margin-top:60px;}
        .related-card{background:var(--bg-card);border-radius:var(--radius);padding:24px;box-shadow:var(--shadow-sm);border:1px solid var(--border-light);transition:transform var(--transition),box-shadow var(--transition);}
        .related-card:hover{transform:translateY(-4px);box-shadow:var(--shadow-hover);}
        .related-card .rc-cat{font-size:0.8rem;color:var(--primary);font-weight:600;margin-bottom:6px;}
        .related-card h4{font-size:1.05rem;font-weight:700;color:var(--text);margin-bottom:8px;line-height:1.4;}
        .related-card p{font-size:0.9rem;color:var(--text-light);margin-bottom:12px;}
        .related-card .rc-date{font-size:0.8rem;color:var(--text-muted);}
        @media(max-width:860px){
            .related-grid{grid-template-columns:1fr 1fr;}
        }
        @media(max-width:520px){
            .related-grid{grid-template-columns:1fr;}
        }

/* roulang page: category1 */
/* ===== 设计变量 ===== */
:root {
    --primary: #1a2a4a;
    --primary-light: #2c4a7a;
    --accent: #d4a853;
    --accent-hover: #c49a3f;
    --accent-light: #f5e8c8;
    --bg-body: #f8f7f4;
    --bg-card: #ffffff;
    --bg-alt: #f0eee9;
    --bg-dark: #0f1a2e;
    --text-primary: #1e293b;
    --text-secondary: #475569;
    --text-muted: #94a3b8;
    --text-inverse: #f1f5f9;
    --border-light: #e2e0db;
    --border-focus: #d4a853;
    --radius-sm: 6px;
    --radius-md: 12px;
    --radius-lg: 20px;
    --shadow-sm: 0 1px 3px rgba(0,0,0,0.06);
    --shadow-md: 0 4px 16px rgba(0,0,0,0.07);
    --shadow-lg: 0 12px 40px rgba(0,0,0,0.08);
    --shadow-xl: 0 20px 60px rgba(0,0,0,0.10);
    --transition: 0.25s cubic-bezier(0.4, 0, 0.2, 1);
    --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    --max-width: 1200px;
    --header-h: 72px;
}

/* ===== 基础 Reset ===== */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; -webkit-font-smoothing: antialiased; }
body {
    font-family: var(--font-sans);
    background: var(--bg-body);
    color: var(--text-primary);
    line-height: 1.7;
    font-size: 16px;
}
a { color: var(--primary-light); text-decoration: none; transition: color var(--transition); }
a:hover { color: var(--accent); }
a:focus-visible { outline: 2px solid var(--accent); outline-offset: 2px; }
img { max-width: 100%; height: auto; display: block; }
button, input, textarea { font-family: inherit; font-size: 1rem; }
ul, ol { list-style: none; }

/* ===== 工具类 ===== */
.container { max-width: var(--max-width); margin: 0 auto; padding: 0 24px; width: 100%; }
.section { padding: 80px 0; }
.section-alt { background: var(--bg-alt); }
.section-dark { background: var(--bg-dark); color: var(--text-inverse); }
.section-title {
    font-size: 2.2rem;
    font-weight: 700;
    letter-spacing: -0.02em;
    line-height: 1.25;
    margin-bottom: 0.5rem;
    color: var(--text-primary);
}
.section-dark .section-title { color: #ffffff; }
.section-subtitle {
    font-size: 1.1rem;
    color: var(--text-secondary);
    max-width: 640px;
    line-height: 1.6;
    margin-bottom: 2.5rem;
}
.section-dark .section-subtitle { color: #cbd5e1; }
.text-center { text-align: center; }
.mx-auto { margin-left: auto; margin-right: auto; }
.mb-1 { margin-bottom: 1rem; }
.mb-2 { margin-bottom: 2rem; }
.mb-3 { margin-bottom: 3rem; }

/* ===== 徽章 / 标签 ===== */
.badge {
    display: inline-block;
    padding: 0.2rem 0.75rem;
    border-radius: 20px;
    font-size: 0.75rem;
    font-weight: 600;
    letter-spacing: 0.02em;
    background: var(--accent-light);
    color: var(--primary);
    border: 1px solid rgba(212,168,83,0.3);
}
.badge-primary { background: var(--primary); color: #fff; border: none; }
.badge-accent { background: var(--accent); color: #fff; border: none; }

/* ===== 按钮 ===== */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    padding: 0.7rem 1.8rem;
    border-radius: var(--radius-sm);
    font-weight: 600;
    font-size: 0.95rem;
    line-height: 1.4;
    border: none;
    cursor: pointer;
    transition: all var(--transition);
    text-decoration: none;
    white-space: nowrap;
}
.btn:focus-visible { outline: 2px solid var(--accent); outline-offset: 2px; }
.btn-accent { background: var(--accent); color: #fff; }
.btn-accent:hover { background: var(--accent-hover); color: #fff; transform: translateY(-1px); box-shadow: 0 6px 20px rgba(212,168,83,0.35); }
.btn-outline { background: transparent; color: var(--primary); border: 1.5px solid var(--primary); }
.btn-outline:hover { background: var(--primary); color: #fff; transform: translateY(-1px); box-shadow: var(--shadow-md); }
.btn-primary { background: var(--primary); color: #fff; }
.btn-primary:hover { background: var(--primary-light); color: #fff; transform: translateY(-1px); box-shadow: var(--shadow-md); }
.btn-lg { padding: 0.9rem 2.4rem; font-size: 1.05rem; border-radius: var(--radius-md); }
.btn-sm { padding: 0.45rem 1.2rem; font-size: 0.85rem; }

/* ===== 导航 ===== */
.site-header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    background: rgba(255,255,255,0.92);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border-bottom: 1px solid var(--border-light);
    height: var(--header-h);
    transition: box-shadow 0.3s;
}
.site-header.scrolled { box-shadow: 0 2px 20px rgba(0,0,0,0.06); }
.header-inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 100%;
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 0 24px;
}
.logo {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 1.35rem;
    font-weight: 700;
    color: var(--primary);
    letter-spacing: -0.02em;
    text-decoration: none;
}
.logo:hover { color: var(--primary); }
.logo-dot {
    display: inline-block;
    width: 10px;
    height: 10px;
    border-radius: 50%;
    background: var(--accent);
    flex-shrink: 0;
}
.nav-links {
    display: flex;
    align-items: center;
    gap: 0.25rem;
}
.nav-links a {
    padding: 0.5rem 1rem;
    font-size: 0.9rem;
    font-weight: 500;
    color: var(--text-secondary);
    border-radius: var(--radius-sm);
    transition: all var(--transition);
    position: relative;
    text-decoration: none;
}
.nav-links a::after {
    content: '';
    position: absolute;
    bottom: 2px;
    left: 50%;
    transform: translateX(-50%);
    width: 0;
    height: 2px;
    background: var(--accent);
    border-radius: 2px;
    transition: width var(--transition);
}
.nav-links a:hover { color: var(--primary); background: rgba(26,42,74,0.04); }
.nav-links a:hover::after { width: 60%; }
.nav-links a.active { color: var(--primary); font-weight: 600; }
.nav-links a.active::after { width: 60%; }
.nav-links a.nav-cta {
    background: var(--accent);
    color: #fff;
    padding: 0.5rem 1.4rem;
    border-radius: var(--radius-sm);
    font-weight: 600;
    margin-left: 0.75rem;
}
.nav-links a.nav-cta::after { display: none; }
.nav-links a.nav-cta:hover { background: var(--accent-hover); color: #fff; transform: translateY(-1px); box-shadow: 0 4px 14px rgba(212,168,83,0.3); }

/* 移动端汉堡 */
.nav-toggle {
    display: none;
    flex-direction: column;
    gap: 5px;
    cursor: pointer;
    padding: 4px;
    border-radius: 4px;
    border: none;
    background: transparent;
    transition: background 0.2s;
}
.nav-toggle:hover { background: rgba(0,0,0,0.04); }
.nav-toggle span {
    display: block;
    width: 26px;
    height: 2px;
    background: var(--text-primary);
    border-radius: 2px;
    transition: all 0.3s;
}

/* ===== Hero 内页 ===== */
.page-hero {
    background: var(--primary);
    padding: 120px 0 60px;
    margin-top: var(--header-h);
    position: relative;
    overflow: hidden;
}
.page-hero::after {
    content: '';
    position: absolute;
    right: -10%;
    top: -30%;
    width: 500px;
    height: 500px;
    border-radius: 50%;
    background: radial-gradient(circle, rgba(212,168,83,0.10) 0%, transparent 70%);
    pointer-events: none;
}
.page-hero h1 {
    font-size: 2.8rem;
    font-weight: 700;
    color: #ffffff;
    letter-spacing: -0.02em;
    line-height: 1.2;
    margin-bottom: 0.75rem;
}
.page-hero p {
    font-size: 1.1rem;
    color: #cbd5e1;
    max-width: 640px;
    line-height: 1.7;
}
.page-hero .badge { margin-bottom: 1rem; }

/* ===== 卡片 ===== */
.card {
    background: var(--bg-card);
    border-radius: var(--radius-md);
    padding: 28px 24px;
    box-shadow: var(--shadow-sm);
    border: 1px solid var(--border-light);
    transition: all var(--transition);
}
.card:hover { box-shadow: var(--shadow-lg); transform: translateY(-2px); }
.card-icon {
    font-size: 2rem;
    color: var(--accent);
    margin-bottom: 1rem;
    display: inline-block;
}
.card h3 { font-size: 1.15rem; font-weight: 600; margin-bottom: 0.4rem; color: var(--text-primary); }
.card p { font-size: 0.92rem; color: var(--text-secondary); line-height: 1.6; }
.card .badge { margin-bottom: 0.75rem; }

/* ===== 列表 / 步骤 ===== */
.step-list {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 24px;
    counter-reset: step;
}
.step-item {
    background: var(--bg-card);
    border-radius: var(--radius-md);
    padding: 28px 24px;
    box-shadow: var(--shadow-sm);
    border: 1px solid var(--border-light);
    position: relative;
    transition: all var(--transition);
    counter-increment: step;
}
.step-item:hover { box-shadow: var(--shadow-md); transform: translateY(-2px); }
.step-num {
    font-size: 2.6rem;
    font-weight: 700;
    color: var(--accent);
    opacity: 0.25;
    line-height: 1;
    margin-bottom: 0.25rem;
    font-feature-settings: "tnum";
}
.step-item h4 { font-size: 1.05rem; font-weight: 600; margin-bottom: 0.3rem; }
.step-item p { font-size: 0.9rem; color: var(--text-secondary); line-height: 1.5; }

/* ===== FAQ ===== */
.faq-list { max-width: 800px; margin: 0 auto; }
.faq-item {
    border-bottom: 1px solid var(--border-light);
    padding: 1.2rem 0;
}
.faq-question {
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-weight: 600;
    font-size: 1.05rem;
    cursor: pointer;
    color: var(--text-primary);
    background: none;
    border: none;
    width: 100%;
    text-align: left;
    padding: 0.2rem 0;
    transition: color 0.2s;
}
.faq-question:hover { color: var(--accent); }
.faq-question::after {
    content: '\f107';
    font-family: 'Font Awesome 6 Free';
    font-weight: 900;
    font-size: 1.1rem;
    transition: transform 0.3s;
    color: var(--text-muted);
}
.faq-question.open::after { transform: rotate(180deg); }
.faq-answer {
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.4s ease, padding 0.3s ease;
    padding-top: 0;
    color: var(--text-secondary);
    font-size: 0.95rem;
    line-height: 1.7;
}
.faq-answer.open { max-height: 300px; padding-top: 0.75rem; }

/* ===== 资源列表 ===== */
.resource-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
    gap: 20px;
}
.resource-card {
    display: flex;
    align-items: flex-start;
    gap: 1rem;
    background: var(--bg-card);
    border-radius: var(--radius-md);
    padding: 20px;
    border: 1px solid var(--border-light);
    box-shadow: var(--shadow-sm);
    transition: all var(--transition);
    cursor: default;
}
.resource-card:hover { box-shadow: var(--shadow-md); transform: translateY(-1px); }
.resource-icon {
    flex-shrink: 0;
    width: 44px;
    height: 44px;
    border-radius: var(--radius-sm);
    background: var(--accent-light);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--accent);
    font-size: 1.2rem;
}
.resource-body h4 { font-size: 1rem; font-weight: 600; margin-bottom: 0.2rem; }
.resource-body p { font-size: 0.85rem; color: var(--text-muted); line-height: 1.5; }
.resource-body .btn { margin-top: 0.5rem; }

/* ===== CTA ===== */
.cta-box {
    background: var(--primary);
    border-radius: var(--radius-lg);
    padding: 60px 48px;
    text-align: center;
    position: relative;
    overflow: hidden;
}
.cta-box::before {
    content: '';
    position: absolute;
    top: -60%;
    right: -20%;
    width: 400px;
    height: 400px;
    border-radius: 50%;
    background: radial-gradient(circle, rgba(212,168,83,0.10) 0%, transparent 70%);
}
.cta-box h2 { font-size: 2rem; font-weight: 700; color: #fff; margin-bottom: 0.75rem; }
.cta-box p { font-size: 1.05rem; color: #cbd5e1; max-width: 560px; margin: 0 auto 1.8rem; }
.cta-box .btn { background: var(--accent); color: #fff; }
.cta-box .btn:hover { background: var(--accent-hover); box-shadow: 0 8px 28px rgba(212,168,83,0.35); }

/* ===== 页脚 ===== */
.site-footer {
    background: var(--bg-dark);
    color: #cbd5e1;
    padding: 56px 0 32px;
}
.footer-grid {
    display: grid;
    grid-template-columns: 1.8fr 1fr 1fr 1fr;
    gap: 40px;
    margin-bottom: 40px;
}
.footer-brand .logo { color: #ffffff; margin-bottom: 0.75rem; }
.footer-brand p { font-size: 0.88rem; line-height: 1.7; color: #94a3b8; max-width: 360px; margin-top: 0.5rem; }
.footer-col h4 { font-size: 0.95rem; font-weight: 600; color: #ffffff; margin-bottom: 0.75rem; }
.footer-col ul { display: flex; flex-direction: column; gap: 0.5rem; }
.footer-col ul a {
    font-size: 0.88rem;
    color: #94a3b8;
    text-decoration: none;
    transition: color 0.2s;
}
.footer-col ul a:hover { color: var(--accent); }
.footer-bottom {
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 12px;
    padding-top: 24px;
    border-top: 1px solid rgba(255,255,255,0.06);
    font-size: 0.82rem;
    color: #64748b;
}
.footer-bottom a { color: #94a3b8; text-decoration: none; }
.footer-bottom a:hover { color: var(--accent); }

/* ===== 响应式 ===== */
@media (max-width: 1024px) {
    .footer-grid { grid-template-columns: 1fr 1fr; gap: 32px; }
    .page-hero h1 { font-size: 2.4rem; }
    .section-title { font-size: 1.9rem; }
}

@media (max-width: 768px) {
    .nav-links {
        position: fixed;
        top: var(--header-h);
        left: 0;
        right: 0;
        background: rgba(255,255,255,0.98);
        backdrop-filter: blur(12px);
        -webkit-backdrop-filter: blur(12px);
        flex-direction: column;
        padding: 20px 24px;
        gap: 0.5rem;
        box-shadow: 0 20px 40px rgba(0,0,0,0.08);
        transform: translateY(-120%);
        opacity: 0;
        transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
        border-bottom: 1px solid var(--border-light);
        align-items: stretch;
    }
    .nav-links.open { transform: translateY(0); opacity: 1; }
    .nav-links a { padding: 0.7rem 1rem; font-size: 1rem; border-radius: var(--radius-sm); }
    .nav-links a::after { display: none; }
    .nav-links a.active { background: rgba(26,42,74,0.05); }
    .nav-links a.nav-cta { margin-left: 0; margin-top: 0.5rem; text-align: center; }
    .nav-toggle { display: flex; }
    .header-inner { padding: 0 16px; }
    .page-hero { padding: 100px 0 40px; }
    .page-hero h1 { font-size: 1.9rem; }
    .page-hero p { font-size: 1rem; }
    .section { padding: 56px 0; }
    .section-title { font-size: 1.6rem; }
    .section-subtitle { font-size: 1rem; }
    .cta-box { padding: 40px 24px; }
    .cta-box h2 { font-size: 1.5rem; }
    .footer-grid { grid-template-columns: 1fr; gap: 28px; }
    .footer-bottom { flex-direction: column; text-align: center; }
    .step-list { grid-template-columns: 1fr 1fr; }
    .resource-grid { grid-template-columns: 1fr; }
}

@media (max-width: 520px) {
    .step-list { grid-template-columns: 1fr; }
    .page-hero h1 { font-size: 1.6rem; }
    .card { padding: 20px 16px; }
    .container { padding: 0 16px; }
    .footer-grid { gap: 24px; }
}

/* ===== 面包屑 ===== */
.breadcrumb {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: 0.4rem;
    font-size: 0.85rem;
    color: var(--text-muted);
    margin-bottom: 1.5rem;
    padding-top: 0.5rem;
}
.breadcrumb a { color: #94a3b8; text-decoration: none; }
.breadcrumb a:hover { color: var(--accent); }
.breadcrumb span { color: #64748b; }
.breadcrumb .sep { color: #475569; }

/* roulang page: category2 */
/* ===== 设计变量 ===== */
    :root {
        --primary: #1a2a6c;
        --primary-light: #3a4a8c;
        --secondary: #e94560;
        --secondary-light: #ff6b7a;
        --accent: #f5a623;
        --bg-main: #f8f9fc;
        --bg-card: #ffffff;
        --bg-dark: #0f1a3a;
        --bg-section-alt: #f0f2f8;
        --text-primary: #1a1a2e;
        --text-secondary: #4a4a6a;
        --text-muted: #8a8aaa;
        --text-light: #f8f9fc;
        --border-color: #e8eaf0;
        --radius-sm: 8px;
        --radius-md: 14px;
        --radius-lg: 24px;
        --radius-xl: 32px;
        --shadow-sm: 0 2px 12px rgba(26,42,108,0.06);
        --shadow-md: 0 8px 32px rgba(26,42,108,0.10);
        --shadow-lg: 0 20px 60px rgba(26,42,108,0.14);
        --transition: 0.30s cubic-bezier(0.4, 0, 0.2, 1);
        --font-sans: 'Segoe UI', 'PingFang SC', 'Microsoft YaHei', system-ui, sans-serif;
        --max-width: 1200px;
        --header-h: 72px;
    }

    /* ===== 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-sans);
        font-size: 16px;
        line-height: 1.7;
        color: var(--text-primary);
        background: var(--bg-main);
        -webkit-font-smoothing: antialiased;
    }
    a { color: var(--primary); text-decoration: none; transition: var(--transition); }
    a:hover { color: var(--secondary); }
    a:focus-visible { outline: 3px solid var(--secondary); outline-offset: 2px; border-radius: 4px; }
    img { max-width: 100%; height: auto; display: block; }
    ul, ol { list-style: none; }
    h1, h2, h3, h4, h5, h6 { font-weight: 700; line-height: 1.3; color: var(--text-primary); }
    h1 { font-size: 2.6rem; letter-spacing: -0.02em; }
    h2 { font-size: 2.0rem; letter-spacing: -0.01em; }
    h3 { font-size: 1.4rem; }
    h4 { font-size: 1.15rem; }
    p { margin-bottom: 1rem; color: var(--text-secondary); }
    .container { max-width: var(--max-width); margin: 0 auto; padding: 0 24px; width: 100%; }

    /* ===== Header / 导航 ===== */
    .site-header {
        position: fixed; top: 0; left: 0; right: 0;
        height: var(--header-h);
        background: rgba(255,255,255,0.92);
        backdrop-filter: blur(20px);
        -webkit-backdrop-filter: blur(20px);
        border-bottom: 1px solid var(--border-color);
        z-index: 1000;
        transition: var(--transition);
    }
    .site-header.scrolled { box-shadow: var(--shadow-sm); }
    .header-inner {
        max-width: var(--max-width);
        margin: 0 auto;
        padding: 0 24px;
        height: 100%;
        display: flex;
        align-items: center;
        justify-content: space-between;
    }
    .logo {
        display: inline-flex;
        align-items: center;
        gap: 10px;
        font-size: 1.5rem;
        font-weight: 800;
        color: var(--primary);
        letter-spacing: -0.02em;
    }
    .logo:hover { color: var(--primary); opacity: 0.85; }
    .logo-dot {
        display: inline-block;
        width: 10px; height: 10px;
        border-radius: 50%;
        background: var(--secondary);
        flex-shrink: 0;
    }
    .nav-links {
        display: flex;
        align-items: center;
        gap: 8px;
    }
    .nav-links a {
        padding: 8px 18px;
        font-size: 0.95rem;
        font-weight: 500;
        color: var(--text-secondary);
        border-radius: var(--radius-sm);
        transition: var(--transition);
        position: relative;
    }
    .nav-links a::after {
        content: '';
        position: absolute;
        bottom: 2px; left: 50%;
        width: 0; height: 3px;
        background: var(--secondary);
        border-radius: 4px;
        transform: translateX(-50%);
        transition: var(--transition);
    }
    .nav-links a:hover { color: var(--primary); background: rgba(26,42,108,0.04); }
    .nav-links a:hover::after { width: 40%; }
    .nav-links a.active { color: var(--primary); background: rgba(26,42,108,0.06); }
    .nav-links a.active::after { width: 60%; }
    .nav-links a.nav-cta {
        background: var(--secondary);
        color: #fff;
        border-radius: 50px;
        padding: 10px 28px;
        font-weight: 600;
        box-shadow: 0 4px 16px rgba(233,69,96,0.28);
    }
    .nav-links a.nav-cta::after { display: none; }
    .nav-links a.nav-cta:hover { background: #d63850; transform: translateY(-1px); box-shadow: 0 6px 24px rgba(233,69,96,0.35); }
    .nav-toggle {
        display: none;
        flex-direction: column;
        gap: 5px;
        cursor: pointer;
        padding: 8px;
        border: none; background: none;
    }
    .nav-toggle span {
        display: block;
        width: 28px; height: 3px;
        background: var(--primary);
        border-radius: 4px;
        transition: var(--transition);
    }
    .nav-toggle[aria-expanded="true"] span:nth-child(1) { transform: rotate(45deg) translate(6px,6px); }
    .nav-toggle[aria-expanded="true"] span:nth-child(2) { opacity: 0; }
    .nav-toggle[aria-expanded="true"] span:nth-child(3) { transform: rotate(-45deg) translate(6px,-6px); }

    /* ===== 移动端导航 ===== */
    @media (max-width: 768px) {
        .nav-links {
            position: fixed;
            top: var(--header-h); left: 0; right: 0;
            background: rgba(255,255,255,0.98);
            backdrop-filter: blur(20px);
            flex-direction: column;
            padding: 20px 24px 32px;
            gap: 4px;
            border-bottom: 1px solid var(--border-color);
            transform: translateY(-120%);
            opacity: 0;
            pointer-events: none;
            transition: var(--transition);
            box-shadow: var(--shadow-md);
        }
        .nav-links.open {
            transform: translateY(0);
            opacity: 1;
            pointer-events: auto;
        }
        .nav-links a { width: 100%; padding: 14px 18px; font-size: 1.1rem; }
        .nav-links a.nav-cta { text-align: center; margin-top: 8px; }
        .nav-toggle { display: flex; }
        .header-inner { padding: 0 16px; }
    }

    /* ===== 分类 Hero ===== */
    .category-hero {
        padding: 140px 0 72px;
        background: linear-gradient(135deg, var(--bg-dark) 0%, #1a2a6c 60%, #2a3a7c 100%);
        position: relative;
        overflow: hidden;
    }
    .category-hero::before {
        content: '';
        position: absolute;
        top: -30%; right: -10%;
        width: 500px; height: 500px;
        background: radial-gradient(circle, rgba(233,69,96,0.15) 0%, transparent 70%);
        border-radius: 50%;
        pointer-events: none;
    }
    .category-hero::after {
        content: '';
        position: absolute;
        bottom: -20%; left: -5%;
        width: 400px; height: 400px;
        background: radial-gradient(circle, rgba(245,166,35,0.10) 0%, transparent 70%);
        border-radius: 50%;
        pointer-events: none;
    }
    .category-hero .container { position: relative; z-index: 2; }
    .category-hero h1 {
        color: var(--text-light);
        font-size: 2.8rem;
        margin-bottom: 16px;
    }
    .category-hero h1 i { color: var(--secondary); margin-right: 12px; }
    .category-hero p {
        color: rgba(255,255,255,0.75);
        font-size: 1.2rem;
        max-width: 680px;
        margin-bottom: 28px;
    }
    .hero-badges {
        display: flex;
        flex-wrap: wrap;
        gap: 12px;
    }
    .hero-badges .badge {
        background: rgba(255,255,255,0.10);
        backdrop-filter: blur(6px);
        border: 1px solid rgba(255,255,255,0.12);
        color: var(--text-light);
        padding: 6px 18px;
        border-radius: 50px;
        font-size: 0.85rem;
        font-weight: 500;
        display: inline-flex;
        align-items: center;
        gap: 6px;
    }
    .hero-badges .badge i { color: var(--accent); }

    /* ===== 通用板块 ===== */
    .section { padding: 80px 0; }
    .section-alt { background: var(--bg-section-alt); }
    .section-title {
        text-align: center;
        margin-bottom: 48px;
    }
    .section-title h2 { margin-bottom: 12px; }
    .section-title p {
        color: var(--text-muted);
        max-width: 600px;
        margin: 0 auto;
        font-size: 1.1rem;
    }
    .section-title .title-accent {
        display: inline-block;
        width: 50px; height: 4px;
        background: var(--secondary);
        border-radius: 4px;
        margin-bottom: 16px;
    }

    /* ===== 攻略分类标签 ===== */
    .guide-tags {
        display: flex;
        flex-wrap: wrap;
        justify-content: center;
        gap: 10px;
        margin-bottom: 40px;
    }
    .guide-tag {
        padding: 8px 24px;
        border-radius: 50px;
        background: var(--bg-card);
        border: 1px solid var(--border-color);
        font-size: 0.9rem;
        font-weight: 500;
        color: var(--text-secondary);
        cursor: pointer;
        transition: var(--transition);
    }
    .guide-tag:hover, .guide-tag.active {
        background: var(--primary);
        color: #fff;
        border-color: var(--primary);
        box-shadow: 0 4px 16px rgba(26,42,108,0.20);
    }
    .guide-tag i { margin-right: 6px; }

    /* ===== 卡片网格 ===== */
    .card-grid {
        display: grid;
        grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
        gap: 28px;
    }
    .card {
        background: var(--bg-card);
        border-radius: var(--radius-md);
        overflow: hidden;
        box-shadow: var(--shadow-sm);
        transition: var(--transition);
        border: 1px solid var(--border-color);
        display: flex;
        flex-direction: column;
    }
    .card:hover {
        transform: translateY(-6px);
        box-shadow: var(--shadow-md);
        border-color: transparent;
    }
    .card-image {
        height: 180px;
        background: linear-gradient(135deg, var(--primary-light) 0%, var(--bg-dark) 100%);
        display: flex;
        align-items: center;
        justify-content: center;
        font-size: 3rem;
        color: rgba(255,255,255,0.25);
        position: relative;
    }
    .card-image .card-badge {
        position: absolute;
        top: 12px; left: 12px;
        background: var(--secondary);
        color: #fff;
        padding: 4px 14px;
        border-radius: 50px;
        font-size: 0.75rem;
        font-weight: 600;
    }
    .card-body { padding: 24px; flex: 1; display: flex; flex-direction: column; }
    .card-body h3 { font-size: 1.2rem; margin-bottom: 10px; }
    .card-body h3 a { color: var(--text-primary); }
    .card-body h3 a:hover { color: var(--secondary); }
    .card-body p { font-size: 0.95rem; color: var(--text-muted); margin-bottom: 16px; flex: 1; }
    .card-meta {
        display: flex;
        align-items: center;
        gap: 16px;
        font-size: 0.85rem;
        color: var(--text-muted);
        padding-top: 14px;
        border-top: 1px solid var(--border-color);
    }
    .card-meta i { margin-right: 4px; }

    /* ===== 图文列表 ===== */
    .guide-list { display: flex; flex-direction: column; gap: 20px; }
    .guide-list-item {
        display: flex;
        align-items: flex-start;
        gap: 20px;
        background: var(--bg-card);
        border-radius: var(--radius-md);
        padding: 24px;
        box-shadow: var(--shadow-sm);
        border: 1px solid var(--border-color);
        transition: var(--transition);
        cursor: pointer;
    }
    .guide-list-item:hover {
        box-shadow: var(--shadow-md);
        transform: translateX(4px);
        border-color: transparent;
    }
    .guide-list-item .item-index {
        flex-shrink: 0;
        width: 48px; height: 48px;
        border-radius: 50%;
        background: var(--primary);
        color: #fff;
        display: flex;
        align-items: center;
        justify-content: center;
        font-weight: 700;
        font-size: 1.2rem;
    }
    .guide-list-item:nth-child(2) .item-index { background: var(--secondary); }
    .guide-list-item:nth-child(3) .item-index { background: var(--accent); }
    .guide-list-item .item-content { flex: 1; }
    .guide-list-item .item-content h4 { font-size: 1.1rem; margin-bottom: 6px; }
    .guide-list-item .item-content p { font-size: 0.9rem; color: var(--text-muted); margin-bottom: 0; }
    .guide-list-item .item-tag {
        flex-shrink: 0;
        padding: 4px 16px;
        border-radius: 50px;
        background: var(--bg-section-alt);
        color: var(--text-secondary);
        font-size: 0.8rem;
        font-weight: 500;
    }

    /* ===== 专题深挖 ===== */
    .topic-grid {
        display: grid;
        grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
        gap: 24px;
    }
    .topic-card {
        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);
        text-align: center;
    }
    .topic-card:hover {
        transform: translateY(-4px);
        box-shadow: var(--shadow-md);
        border-color: var(--primary);
    }
    .topic-card .topic-icon {
        width: 60px; height: 60px;
        border-radius: 50%;
        background: var(--bg-section-alt);
        display: flex;
        align-items: center;
        justify-content: center;
        font-size: 1.6rem;
        color: var(--primary);
        margin: 0 auto 16px;
        transition: var(--transition);
    }
    .topic-card:hover .topic-icon { background: var(--primary); color: #fff; }
    .topic-card h4 { margin-bottom: 8px; }
    .topic-card p { font-size: 0.9rem; color: var(--text-muted); margin-bottom: 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-sm);
        border: 1px solid var(--border-color);
        overflow: hidden;
        transition: var(--transition);
    }
    .faq-item:hover { border-color: var(--primary-light); }
    .faq-question {
        padding: 18px 24px;
        font-weight: 600;
        font-size: 1.05rem;
        cursor: pointer;
        display: flex;
        justify-content: space-between;
        align-items: center;
        gap: 16px;
        color: var(--text-primary);
        background: none;
        border: none;
        width: 100%;
        text-align: left;
        font-family: var(--font-sans);
        transition: var(--transition);
    }
    .faq-question:hover { color: var(--primary); }
    .faq-question i { color: var(--secondary); transition: var(--transition); font-size: 0.9rem; }
    .faq-item.open .faq-question i { transform: rotate(180deg); }
    .faq-answer {
        padding: 0 24px 18px;
        color: var(--text-secondary);
        font-size: 0.95rem;
        line-height: 1.7;
        display: none;
    }
    .faq-item.open .faq-answer { display: block; }

    /* ===== CTA ===== */
    .cta-section {
        background: linear-gradient(135deg, var(--bg-dark) 0%, var(--primary) 100%);
        padding: 80px 0;
        text-align: center;
        position: relative;
        overflow: hidden;
    }
    .cta-section::before {
        content: '';
        position: absolute;
        top: -40%; left: -20%;
        width: 600px; height: 600px;
        background: radial-gradient(circle, rgba(233,69,96,0.12) 0%, transparent 70%);
        border-radius: 50%;
        pointer-events: none;
    }
    .cta-section h2 { color: var(--text-light); font-size: 2rem; margin-bottom: 16px; }
    .cta-section p { color: rgba(255,255,255,0.7); max-width: 560px; margin: 0 auto 32px; font-size: 1.1rem; }
    .cta-btn {
        display: inline-flex;
        align-items: center;
        gap: 10px;
        padding: 16px 44px;
        background: var(--secondary);
        color: #fff;
        font-size: 1.1rem;
        font-weight: 600;
        border-radius: 50px;
        box-shadow: 0 8px 32px rgba(233,69,96,0.35);
        transition: var(--transition);
        border: none; cursor: pointer;
    }
    .cta-btn:hover { background: #d63850; transform: translateY(-2px); box-shadow: 0 12px 40px rgba(233,69,96,0.45); color: #fff; }

    /* ===== 页脚 ===== */
    .site-footer {
        background: var(--bg-dark);
        color: rgba(255,255,255,0.7);
        padding: 60px 0 32px;
    }
    .site-footer .logo { color: var(--text-light); margin-bottom: 0.75rem; }
    .site-footer .logo:hover { opacity: 0.85; }
    .site-footer p { color: rgba(255,255,255,0.55); font-size: 0.95rem; max-width: 360px; }
    .footer-grid {
        display: grid;
        grid-template-columns: 2fr 1fr 1fr 1fr;
        gap: 40px;
        margin-bottom: 40px;
    }
    .footer-col h4 { color: var(--text-light); font-size: 1rem; margin-bottom: 18px; font-weight: 600; }
    .footer-col ul { display: flex; flex-direction: column; gap: 10px; }
    .footer-col ul a { color: rgba(255,255,255,0.55); font-size: 0.9rem; transition: var(--transition); }
    .footer-col ul a:hover { color: var(--secondary); padding-left: 4px; }
    .footer-bottom {
        padding-top: 28px;
        border-top: 1px solid rgba(255,255,255,0.08);
        display: flex;
        justify-content: space-between;
        align-items: center;
        flex-wrap: wrap;
        gap: 12px;
        font-size: 0.85rem;
        color: rgba(255,255,255,0.4);
    }
    .footer-bottom a { color: rgba(255,255,255,0.4); }
    .footer-bottom a:hover { color: var(--secondary); }

    /* ===== 响应式 ===== */
    @media (max-width: 1024px) {
        .footer-grid { grid-template-columns: 1fr 1fr; }
        .category-hero h1 { font-size: 2.2rem; }
    }
    @media (max-width: 768px) {
        .category-hero { padding: 120px 0 52px; }
        .category-hero h1 { font-size: 1.8rem; }
        .category-hero p { font-size: 1rem; }
        .section { padding: 56px 0; }
        .section-title h2 { font-size: 1.6rem; }
        .card-grid { grid-template-columns: 1fr; }
        .topic-grid { grid-template-columns: 1fr 1fr; }
        .guide-list-item { flex-wrap: wrap; }
        .guide-list-item .item-tag { width: 100%; text-align: left; padding-left: 68px; }
        .footer-grid { grid-template-columns: 1fr; gap: 28px; }
        .footer-bottom { flex-direction: column; text-align: center; }
    }
    @media (max-width: 520px) {
        .category-hero h1 { font-size: 1.5rem; }
        .hero-badges .badge { font-size: 0.75rem; padding: 4px 14px; }
        .topic-grid { grid-template-columns: 1fr; }
        .card-body { padding: 18px; }
        .faq-question { padding: 14px 18px; font-size: 0.95rem; }
    }

    /* ===== 辅助 ===== */
    .text-center { text-align: center; }
    .mt-1 { margin-top: 1rem; }
    .mt-2 { margin-top: 2rem; }
    .mb-1 { margin-bottom: 1rem; }
    .mb-2 { margin-bottom: 2rem; }
    .gap-sm { gap: 12px; }
    .flex-center { display: flex; align-items: center; justify-content: center; }
    .sr-only { position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px; overflow: hidden; clip: rect(0,0,0,0); border: 0; }

/* roulang page: category3 */
/* ===== 设计变量 ===== */
        :root {
            --color-primary: #1a2a4a;
            --color-primary-light: #2d4a7a;
            --color-primary-dark: #0f1a30;
            --color-accent: #f0b429;
            --color-accent-hover: #d9a120;
            --color-safe: #10b981;
            --color-safe-light: #d1fae5;
            --color-bg: #f8fafc;
            --color-bg-alt: #eef2f7;
            --color-bg-card: #ffffff;
            --color-text: #1a1a2e;
            --color-text-light: #4a5568;
            --color-text-muted: #8899aa;
            --color-border: #e2e8f0;
            --color-border-light: #f0f2f5;
            --color-footer-bg: #0f1a30;
            --color-footer-text: #cbd5e1;
            --radius-sm: 6px;
            --radius-md: 12px;
            --radius-lg: 20px;
            --radius-xl: 28px;
            --shadow-sm: 0 2px 8px rgba(26,42,74,0.06);
            --shadow-md: 0 6px 24px rgba(26,42,74,0.08);
            --shadow-lg: 0 16px 48px rgba(26,42,74,0.12);
            --shadow-xl: 0 24px 64px rgba(26,42,74,0.16);
            --transition: 0.25s cubic-bezier(0.4, 0, 0.2, 1);
            --font-sans: 'Segoe UI', 'PingFang SC', 'Microsoft YaHei', 'Helvetica Neue', Arial, sans-serif;
            --container-max: 1200px;
            --nav-height: 72px;
        }

        /* ===== 基础 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(--color-text);
            background: var(--color-bg);
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
        }
        a {
            color: var(--color-primary-light);
            text-decoration: none;
            transition: color var(--transition);
        }
        a:hover, a:focus {
            color: var(--color-primary);
            text-decoration: none;
        }
        a:focus-visible {
            outline: 2px solid var(--color-accent);
            outline-offset: 2px;
            border-radius: 4px;
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
        }
        button, input, select, textarea {
            font-family: inherit;
            font-size: inherit;
            line-height: inherit;
        }
        button {
            cursor: pointer;
            border: none;
            background: none;
        }
        ul, ol {
            list-style: none;
        }
        h1, h2, h3, h4, h5, h6 {
            line-height: 1.3;
            font-weight: 700;
            color: var(--color-primary);
        }
        p {
            margin-bottom: 1rem;
            color: var(--color-text-light);
        }
        .container {
            max-width: var(--container-max);
            margin: 0 auto;
            padding: 0 24px;
        }
        @media screen and (max-width: 639px) {
            .container {
                padding: 0 16px;
            }
        }

        /* ===== 导航 Header ===== */
        .site-header {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            z-index: 1000;
            height: var(--nav-height);
            background: rgba(255,255,255,0.92);
            backdrop-filter: blur(16px);
            -webkit-backdrop-filter: blur(16px);
            border-bottom: 1px solid var(--color-border-light);
            transition: box-shadow var(--transition);
        }
        .site-header.scrolled {
            box-shadow: 0 2px 20px rgba(26,42,74,0.08);
        }
        .header-inner {
            max-width: var(--container-max);
            margin: 0 auto;
            padding: 0 24px;
            height: 100%;
            display: flex;
            align-items: center;
            justify-content: space-between;
        }
        .logo {
            display: inline-flex;
            align-items: center;
            gap: 10px;
            font-size: 1.35rem;
            font-weight: 700;
            color: var(--color-primary);
            letter-spacing: -0.01em;
            transition: opacity var(--transition);
        }
        .logo:hover {
            opacity: 0.85;
            color: var(--color-primary);
        }
        .logo-dot {
            display: inline-block;
            width: 10px;
            height: 10px;
            border-radius: 50%;
            background: var(--color-accent);
            flex-shrink: 0;
        }
        .nav-links {
            display: flex;
            align-items: center;
            gap: 2rem;
        }
        .nav-links a {
            font-size: 0.92rem;
            font-weight: 500;
            color: var(--color-text-light);
            padding: 6px 0;
            position: relative;
            transition: color var(--transition);
            letter-spacing: 0.01em;
        }
        .nav-links a::after {
            content: '';
            position: absolute;
            bottom: -2px;
            left: 0;
            width: 0;
            height: 2px;
            background: var(--color-accent);
            transition: width var(--transition);
            border-radius: 2px;
        }
        .nav-links a:hover {
            color: var(--color-primary);
        }
        .nav-links a:hover::after {
            width: 100%;
        }
        .nav-links a.active {
            color: var(--color-primary);
            font-weight: 600;
        }
        .nav-links a.active::after {
            width: 100%;
            background: var(--color-accent);
        }
        .nav-links a.nav-cta {
            background: var(--color-accent);
            color: #fff;
            padding: 8px 20px;
            border-radius: 30px;
            font-weight: 600;
            font-size: 0.88rem;
            transition: background var(--transition), transform var(--transition), box-shadow var(--transition);
            box-shadow: 0 4px 12px rgba(240,180,41,0.30);
        }
        .nav-links a.nav-cta::after {
            display: none;
        }
        .nav-links a.nav-cta:hover {
            background: var(--color-accent-hover);
            transform: translateY(-1px);
            box-shadow: 0 6px 20px rgba(240,180,41,0.40);
            color: #fff;
        }
        .nav-toggle {
            display: none;
            flex-direction: column;
            gap: 6px;
            padding: 8px 4px;
            cursor: pointer;
            user-select: none;
        }
        .nav-toggle span {
            display: block;
            width: 26px;
            height: 2px;
            background: var(--color-primary);
            border-radius: 2px;
            transition: transform var(--transition), opacity var(--transition);
        }
        .nav-toggle.active span:nth-child(1) {
            transform: translateY(8px) rotate(45deg);
        }
        .nav-toggle.active span:nth-child(2) {
            opacity: 0;
        }
        .nav-toggle.active span:nth-child(3) {
            transform: translateY(-8px) rotate(-45deg);
        }

        @media screen and (max-width: 768px) {
            .nav-links {
                position: fixed;
                top: var(--nav-height);
                left: 0;
                right: 0;
                background: rgba(255,255,255,0.98);
                backdrop-filter: blur(16px);
                -webkit-backdrop-filter: blur(16px);
                flex-direction: column;
                gap: 0.25rem;
                padding: 1.5rem 2rem 2rem;
                border-bottom: 1px solid var(--color-border);
                transform: translateY(-110%);
                opacity: 0;
                pointer-events: none;
                transition: transform 0.35s ease, opacity 0.3s ease;
                box-shadow: 0 20px 40px rgba(26,42,74,0.10);
                border-radius: 0 0 var(--radius-lg) var(--radius-lg);
            }
            .nav-links.open {
                transform: translateY(0);
                opacity: 1;
                pointer-events: auto;
            }
            .nav-links a {
                font-size: 1.1rem;
                padding: 12px 8px;
                width: 100%;
                text-align: center;
                border-bottom: 1px solid var(--color-border-light);
            }
            .nav-links a:last-of-type {
                border-bottom: none;
            }
            .nav-links a.nav-cta {
                width: auto;
                margin-top: 0.5rem;
                padding: 10px 32px;
            }
            .nav-toggle {
                display: flex;
            }
        }
        @media screen and (max-width: 520px) {
            .header-inner {
                padding: 0 16px;
            }
            .logo {
                font-size: 1.15rem;
            }
            .nav-links {
                padding: 1.2rem 1.2rem 1.8rem;
            }
        }

        /* ===== 页面主体 ===== */
        .page-main {
            padding-top: var(--nav-height);
        }

        /* ===== Hero 板块 ===== */
        .hero-section {
            position: relative;
            background: linear-gradient(135deg, var(--color-primary-dark) 0%, var(--color-primary) 50%, var(--color-primary-light) 100%);
            padding: 100px 0 90px;
            overflow: hidden;
            isolation: isolate;
        }
        .hero-section::before {
            content: '';
            position: absolute;
            inset: 0;
            background: radial-gradient(ellipse at 30% 50%, rgba(240,180,41,0.10) 0%, transparent 60%),
                        radial-gradient(ellipse at 70% 30%, rgba(16,185,129,0.08) 0%, transparent 50%);
            z-index: 0;
            pointer-events: none;
        }
        .hero-section .container {
            position: relative;
            z-index: 1;
        }
        .hero-badge {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            background: rgba(255,255,255,0.08);
            backdrop-filter: blur(4px);
            border: 1px solid rgba(255,255,255,0.12);
            padding: 6px 18px;
            border-radius: 30px;
            font-size: 0.82rem;
            color: rgba(255,255,255,0.85);
            letter-spacing: 0.03em;
            margin-bottom: 24px;
        }
        .hero-badge i {
            color: var(--color-safe);
            font-size: 0.7rem;
        }
        .hero-title {
            font-size: clamp(2.2rem, 5.5vw, 3.6rem);
            font-weight: 800;
            color: #fff;
            line-height: 1.15;
            max-width: 800px;
            margin-bottom: 20px;
            letter-spacing: -0.02em;
        }
        .hero-title span {
            color: var(--color-accent);
        }
        .hero-desc {
            font-size: clamp(1rem, 2vw, 1.2rem);
            color: rgba(255,255,255,0.75);
            max-width: 620px;
            line-height: 1.7;
            margin-bottom: 32px;
        }
        .hero-actions {
            display: flex;
            flex-wrap: wrap;
            gap: 16px;
            align-items: center;
        }
        .btn-primary {
            display: inline-flex;
            align-items: center;
            gap: 10px;
            background: var(--color-accent);
            color: #fff;
            font-weight: 600;
            font-size: 1rem;
            padding: 14px 32px;
            border-radius: 40px;
            box-shadow: 0 4px 16px rgba(240,180,41,0.35);
            transition: background var(--transition), transform var(--transition), box-shadow var(--transition);
            border: none;
            cursor: pointer;
        }
        .btn-primary:hover {
            background: var(--color-accent-hover);
            transform: translateY(-2px);
            box-shadow: 0 8px 28px rgba(240,180,41,0.45);
            color: #fff;
        }
        .btn-primary:focus-visible {
            outline: 2px solid #fff;
            outline-offset: 3px;
        }
        .btn-outline-light {
            display: inline-flex;
            align-items: center;
            gap: 10px;
            background: transparent;
            color: #fff;
            font-weight: 500;
            font-size: 1rem;
            padding: 13px 28px;
            border-radius: 40px;
            border: 1.5px solid rgba(255,255,255,0.30);
            transition: border-color var(--transition), background var(--transition), transform var(--transition);
            cursor: pointer;
        }
        .btn-outline-light:hover {
            border-color: rgba(255,255,255,0.7);
            background: rgba(255,255,255,0.06);
            transform: translateY(-2px);
            color: #fff;
        }
        .hero-stats {
            display: flex;
            flex-wrap: wrap;
            gap: 40px;
            margin-top: 48px;
            padding-top: 32px;
            border-top: 1px solid rgba(255,255,255,0.10);
        }
        .hero-stat-item {
            text-align: left;
        }
        .hero-stat-item .num {
            font-size: 1.8rem;
            font-weight: 800;
            color: #fff;
            line-height: 1.2;
            letter-spacing: -0.01em;
        }
        .hero-stat-item .num span {
            color: var(--color-accent);
        }
        .hero-stat-item .label {
            font-size: 0.85rem;
            color: rgba(255,255,255,0.6);
            margin-top: 2px;
        }
        @media screen and (max-width: 639px) {
            .hero-section {
                padding: 80px 0 60px;
            }
            .hero-stats {
                gap: 24px;
                flex-direction: column;
            }
            .hero-actions {
                flex-direction: column;
                align-items: stretch;
            }
            .btn-primary, .btn-outline-light {
                justify-content: center;
                text-align: center;
            }
        }

        /* ===== 板块通用 ===== */
        .section {
            padding: 80px 0;
        }
        .section-alt {
            background: var(--color-bg-alt);
        }
        .section-dark {
            background: var(--color-primary);
            color: #fff;
        }
        .section-title {
            font-size: clamp(1.6rem, 3vw, 2.4rem);
            font-weight: 800;
            text-align: center;
            margin-bottom: 12px;
            color: var(--color-primary);
            letter-spacing: -0.01em;
        }
        .section-dark .section-title {
            color: #fff;
        }
        .section-subtitle {
            font-size: 1.05rem;
            color: var(--color-text-muted);
            text-align: center;
            max-width: 640px;
            margin: 0 auto 48px;
            line-height: 1.6;
        }
        .section-dark .section-subtitle {
            color: rgba(255,255,255,0.65);
        }
        @media screen and (max-width: 639px) {
            .section {
                padding: 56px 0;
            }
            .section-subtitle {
                margin-bottom: 32px;
            }
        }

        /* ===== 卡片系统 ===== */
        .card {
            background: var(--color-bg-card);
            border-radius: var(--radius-md);
            box-shadow: var(--shadow-sm);
            padding: 28px 24px;
            transition: transform var(--transition), box-shadow var(--transition);
            border: 1px solid var(--color-border-light);
            height: 100%;
        }
        .card:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow-md);
        }
        .card-icon {
            width: 52px;
            height: 52px;
            border-radius: var(--radius-sm);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.4rem;
            color: #fff;
            margin-bottom: 18px;
            background: var(--color-primary-light);
        }
        .card-icon.green {
            background: var(--color-safe);
        }
        .card-icon.gold {
            background: var(--color-accent);
        }
        .card-icon.blue {
            background: var(--color-primary-light);
        }
        .card h3 {
            font-size: 1.2rem;
            font-weight: 700;
            margin-bottom: 10px;
            color: var(--color-primary);
        }
        .card p {
            font-size: 0.95rem;
            color: var(--color-text-light);
            margin-bottom: 0;
            line-height: 1.65;
        }
        .card .tag {
            display: inline-block;
            background: var(--color-safe-light);
            color: var(--color-safe);
            font-size: 0.72rem;
            font-weight: 600;
            padding: 2px 12px;
            border-radius: 20px;
            margin-top: 14px;
            letter-spacing: 0.02em;
        }

        /* ===== 网格 / Foundation 覆盖 ===== */
        .grid-x {
            margin: 0 -12px;
        }
        .grid-x > .cell {
            padding: 12px;
        }
        .grid-x.grid-margin-x {
            margin: 0 -12px;
        }
        .grid-x.grid-margin-x > .cell {
            padding: 12px;
        }

        /* ===== 数据展示 ===== */
        .stats-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
            gap: 24px;
            text-align: center;
        }
        .stat-card {
            background: var(--color-bg-card);
            border-radius: var(--radius-md);
            padding: 32px 16px;
            box-shadow: var(--shadow-sm);
            border: 1px solid var(--color-border-light);
            transition: transform var(--transition), box-shadow var(--transition);
        }
        .stat-card:hover {
            transform: translateY(-3px);
            box-shadow: var(--shadow-md);
        }
        .stat-card .num {
            font-size: 2.4rem;
            font-weight: 800;
            color: var(--color-primary);
            line-height: 1.2;
        }
        .stat-card .num span {
            color: var(--color-accent);
        }
        .stat-card .label {
            font-size: 0.9rem;
            color: var(--color-text-muted);
            margin-top: 6px;
        }
        .stat-card .sublabel {
            font-size: 0.78rem;
            color: var(--color-text-muted);
            opacity: 0.7;
        }
        @media screen and (max-width: 520px) {
            .stats-grid {
                grid-template-columns: 1fr 1fr;
                gap: 16px;
            }
            .stat-card .num {
                font-size: 1.8rem;
            }
        }

        /* ===== 认证展示 ===== */
        .cert-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(160px, 1fr));
            gap: 20px;
        }
        .cert-card {
            background: var(--color-bg-card);
            border-radius: var(--radius-md);
            padding: 24px 16px;
            text-align: center;
            border: 1px solid var(--color-border-light);
            box-shadow: var(--shadow-sm);
            transition: transform var(--transition), box-shadow var(--transition);
        }
        .cert-card:hover {
            transform: translateY(-2px);
            box-shadow: var(--shadow-md);
        }
        .cert-card i {
            font-size: 2.2rem;
            color: var(--color-primary-light);
            margin-bottom: 12px;
        }
        .cert-card h4 {
            font-size: 0.95rem;
            font-weight: 600;
            color: var(--color-primary);
            margin-bottom: 4px;
        }
        .cert-card p {
            font-size: 0.78rem;
            color: var(--color-text-muted);
            margin-bottom: 0;
        }
        .cert-card .badge-safe {
            display: inline-block;
            background: var(--color-safe-light);
            color: var(--color-safe);
            font-size: 0.68rem;
            font-weight: 600;
            padding: 2px 10px;
            border-radius: 16px;
            margin-top: 8px;
        }

        /* ===== 流程步骤 ===== */
        .steps-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
            gap: 24px;
        }
        .step-card {
            background: var(--color-bg-card);
            border-radius: var(--radius-md);
            padding: 28px 20px;
            text-align: center;
            box-shadow: var(--shadow-sm);
            border: 1px solid var(--color-border-light);
            transition: transform var(--transition), box-shadow var(--transition);
            position: relative;
        }
        .step-card:hover {
            transform: translateY(-3px);
            box-shadow: var(--shadow-md);
        }
        .step-number {
            width: 44px;
            height: 44px;
            border-radius: 50%;
            background: var(--color-accent);
            color: #fff;
            font-weight: 700;
            font-size: 1.1rem;
            display: flex;
            align-items: center;
            justify-content: center;
            margin: 0 auto 16px;
        }
        .step-card h4 {
            font-size: 1.05rem;
            font-weight: 700;
            margin-bottom: 8px;
            color: var(--color-primary);
        }
        .step-card p {
            font-size: 0.9rem;
            color: var(--color-text-light);
            margin-bottom: 0;
        }

        /* ===== 安全提示列表 ===== */
        .tips-list {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 16px;
        }
        .tip-item {
            display: flex;
            align-items: flex-start;
            gap: 14px;
            background: var(--color-bg-card);
            padding: 20px 20px;
            border-radius: var(--radius-sm);
            border: 1px solid var(--color-border-light);
            box-shadow: var(--shadow-sm);
            transition: transform var(--transition), box-shadow var(--transition);
        }
        .tip-item:hover {
            transform: translateY(-2px);
            box-shadow: var(--shadow-md);
        }
        .tip-item i {
            font-size: 1.2rem;
            color: var(--color-safe);
            margin-top: 2px;
            flex-shrink: 0;
        }
        .tip-item .tip-content h4 {
            font-size: 0.95rem;
            font-weight: 600;
            color: var(--color-primary);
            margin-bottom: 4px;
        }
        .tip-item .tip-content p {
            font-size: 0.85rem;
            color: var(--color-text-light);
            margin-bottom: 0;
        }
        @media screen and (max-width: 768px) {
            .tips-list {
                grid-template-columns: 1fr;
            }
        }

        /* ===== FAQ ===== */
        .faq-list {
            max-width: 720px;
            margin: 0 auto;
            display: flex;
            flex-direction: column;
            gap: 12px;
        }
        .faq-item {
            background: var(--color-bg-card);
            border-radius: var(--radius-sm);
            border: 1px solid var(--color-border-light);
            box-shadow: var(--shadow-sm);
            overflow: hidden;
            transition: box-shadow var(--transition);
        }
        .faq-item:hover {
            box-shadow: var(--shadow-md);
        }
        .faq-question {
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding: 18px 20px;
            font-weight: 600;
            font-size: 0.98rem;
            color: var(--color-primary);
            cursor: pointer;
            user-select: none;
            transition: background var(--transition);
            gap: 12px;
        }
        .faq-question:hover {
            background: rgba(26,42,74,0.02);
        }
        .faq-question i {
            font-size: 0.85rem;
            color: var(--color-text-muted);
            transition: transform var(--transition);
            flex-shrink: 0;
        }
        .faq-item.open .faq-question i {
            transform: rotate(180deg);
        }
        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.35s ease, padding 0.3s ease;
            padding: 0 20px;
            font-size: 0.92rem;
            color: var(--color-text-light);
            line-height: 1.7;
        }
        .faq-item.open .faq-answer {
            max-height: 300px;
            padding: 0 20px 20px;
        }

        /* ===== CTA 区块 ===== */
        .cta-section {
            background: linear-gradient(135deg, var(--color-primary-dark), var(--color-primary));
            padding: 80px 0;
            text-align: center;
        }
        .cta-section h2 {
            font-size: clamp(1.6rem, 3vw, 2.4rem);
            font-weight: 800;
            color: #fff;
            margin-bottom: 16px;
        }
        .cta-section p {
            font-size: 1.05rem;
            color: rgba(255,255,255,0.7);
            max-width: 560px;
            margin: 0 auto 32px;
            line-height: 1.6;
        }
        .cta-section .btn-primary {
            font-size: 1.05rem;
            padding: 16px 40px;
        }

        /* ===== 页脚 (复用首页结构) ===== */
        .site-footer {
            background: var(--color-footer-bg);
            color: var(--color-footer-text);
            padding: 56px 0 28px;
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 1.6fr 1fr 1fr 1fr;
            gap: 32px;
            margin-bottom: 40px;
        }
        .footer-brand p {
            font-size: 0.88rem;
            color: var(--color-footer-text);
            opacity: 0.8;
            line-height: 1.7;
            margin-top: 12px;
            margin-bottom: 0;
        }
        .footer-col h4 {
            font-size: 0.95rem;
            font-weight: 700;
            color: #fff;
            margin-bottom: 16px;
            letter-spacing: 0.02em;
        }
        .footer-col ul li {
            margin-bottom: 10px;
        }
        .footer-col ul li a {
            font-size: 0.88rem;
            color: var(--color-footer-text);
            opacity: 0.75;
            transition: opacity var(--transition), color var(--transition);
        }
        .footer-col ul li a:hover {
            opacity: 1;
            color: var(--color-accent);
        }
        .footer-bottom {
            border-top: 1px solid rgba(255,255,255,0.06);
            padding-top: 20px;
            display: flex;
            justify-content: space-between;
            align-items: center;
            flex-wrap: wrap;
            gap: 12px;
            font-size: 0.8rem;
            color: var(--color-footer-text);
            opacity: 0.6;
        }
        .footer-bottom a {
            color: var(--color-footer-text);
            opacity: 0.7;
        }
        .footer-bottom a:hover {
            opacity: 1;
            color: var(--color-accent);
        }
        .footer-brand .logo {
            color: #fff;
        }
        @media screen and (max-width: 768px) {
            .footer-grid {
                grid-template-columns: 1fr 1fr;
                gap: 24px;
            }
            .footer-brand {
                grid-column: 1 / -1;
            }
        }
        @media screen and (max-width: 520px) {
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 20px;
            }
            .footer-bottom {
                flex-direction: column;
                text-align: center;
            }
            .site-footer {
                padding: 40px 0 20px;
            }
        }

        /* ===== 辅助 ===== */
        .text-center {
            text-align: center;
        }
        .mt-1 { margin-top: 0.5rem; }
        .mt-2 { margin-top: 1rem; }
        .mt-3 { margin-top: 1.5rem; }
        .mb-1 { margin-bottom: 0.5rem; }
        .mb-2 { margin-bottom: 1rem; }
        .mb-3 { margin-bottom: 1.5rem; }
        .gap-1 { gap: 0.5rem; }
        .gap-2 { gap: 1rem; }

        /* ===== 滚动条美化 ===== */
        ::-webkit-scrollbar {
            width: 6px;
            height: 6px;
        }
        ::-webkit-scrollbar-track {
            background: var(--color-bg);
        }
        ::-webkit-scrollbar-thumb {
            background: var(--color-border);
            border-radius: 3px;
        }
        ::-webkit-scrollbar-thumb:hover {
            background: var(--color-text-muted);
        }

        /* ===== 打印 ===== */
        @media print {
            .site-header {
                position: relative;
                box-shadow: none;
            }
            .nav-toggle { display: none; }
            .nav-links { display: flex; }
            .hero-section { padding: 40px 0; }
            .section { padding: 40px 0; }
            .card, .stat-card, .cert-card, .step-card, .tip-item, .faq-item {
                box-shadow: none;
                border: 1px solid #ddd;
            }
            .btn-primary, .btn-outline-light, .nav-cta {
                box-shadow: none;
            }
            .cta-section { padding: 40px 0; }
            .site-footer { padding: 30px 0 15px; }
        }