/* roulang page: index */
/* ===== 设计变量 ===== */
        :root {
            --primary: #1a56db;
            --primary-dark: #143fa8;
            --primary-light: #e8effd;
            --secondary: #7c3aed;
            --secondary-light: #f0eaff;
            --accent: #f59e0b;
            --accent-light: #fef3c7;
            --bg: #ffffff;
            --bg-alt: #f6f9fc;
            --bg-dark: #0f172a;
            --text: #0f172a;
            --text-light: #64748b;
            --text-white: #ffffff;
            --border: #e2e8f0;
            --radius-sm: 8px;
            --radius: 12px;
            --radius-lg: 20px;
            --shadow-sm: 0 1px 3px rgba(0,0,0,0.06);
            --shadow: 0 4px 20px rgba(0,0,0,0.07);
            --shadow-lg: 0 12px 40px rgba(0,0,0,0.10);
            --transition: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
            --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', sans-serif;
            --container: 1200px;
            --header-h: 72px;
        }

        /* ===== Reset & Base ===== */
        *, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
        html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }
        body {
            font-family: var(--font-sans);
            font-size: 16px;
            line-height: 1.7;
            color: var(--text);
            background: var(--bg);
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
        }
        img { max-width: 100%; height: auto; display: block; }
        a { color: inherit; text-decoration: none; transition: var(--transition); }
        button, input, textarea { font-family: inherit; font-size: inherit; }
        ul { list-style: none; }
        h1, h2, h3, h4, h5, h6 { line-height: 1.25; font-weight: 700; }
        h2 { font-size: 2rem; margin-bottom: 0.5rem; }
        h3 { font-size: 1.35rem; }
        p { margin-bottom: 0.75rem; color: var(--text-light); }
        .container {
            width: 100%;
            max-width: var(--container);
            margin: 0 auto;
            padding: 0 24px;
        }
        .section { padding: 80px 0; }
        .section-alt { background: var(--bg-alt); }
        .section-dark { background: var(--bg-dark); color: var(--text-white); }
        .section-dark p { color: rgba(255,255,255,0.75); }
        .text-center { text-align: center; }
        .section-label {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            background: var(--primary-light);
            color: var(--primary);
            font-size: 0.85rem;
            font-weight: 600;
            padding: 4px 16px;
            border-radius: 50px;
            margin-bottom: 12px;
            letter-spacing: 0.3px;
        }
        .section-label i { font-size: 0.75rem; }
        .section-title {
            font-size: 2.25rem;
            font-weight: 800;
            margin-bottom: 16px;
            letter-spacing: -0.5px;
        }
        .section-subtitle {
            font-size: 1.1rem;
            color: var(--text-light);
            max-width: 640px;
            margin: 0 auto 48px;
            line-height: 1.7;
        }
        .section-dark .section-subtitle { color: rgba(255,255,255,0.7); }
        .section-dark .section-label { background: rgba(255,255,255,0.12); color: var(--text-white); }

        /* ===== Buttons ===== */
        .btn {
            display: inline-flex;
            align-items: center;
            gap: 10px;
            font-weight: 600;
            font-size: 1rem;
            padding: 14px 32px;
            border-radius: 50px;
            border: none;
            cursor: pointer;
            transition: var(--transition);
            line-height: 1.2;
            text-align: center;
            justify-content: center;
        }
        .btn-primary {
            background: var(--primary);
            color: var(--text-white);
            box-shadow: 0 4px 14px rgba(26,86,219,0.30);
        }
        .btn-primary:hover {
            background: var(--primary-dark);
            box-shadow: 0 8px 28px rgba(26,86,219,0.40);
            transform: translateY(-2px);
        }
        .btn-primary:focus-visible {
            outline: 3px solid var(--primary);
            outline-offset: 2px;
        }
        .btn-secondary {
            background: var(--text-white);
            color: var(--primary);
            border: 2px solid var(--border);
        }
        .btn-secondary:hover {
            border-color: var(--primary);
            background: var(--primary-light);
            transform: translateY(-2px);
            box-shadow: var(--shadow-sm);
        }
        .btn-ghost {
            background: transparent;
            color: var(--text-white);
            border: 2px solid rgba(255,255,255,0.3);
        }
        .btn-ghost:hover {
            border-color: var(--text-white);
            background: rgba(255,255,255,0.08);
            transform: translateY(-2px);
        }
        .btn-accent {
            background: var(--accent);
            color: #1e293b;
            box-shadow: 0 4px 14px rgba(245,158,11,0.35);
        }
        .btn-accent:hover {
            background: #d97706;
            box-shadow: 0 8px 28px rgba(245,158,11,0.45);
            transform: translateY(-2px);
        }
        .btn-sm { padding: 10px 20px; font-size: 0.9rem; }

        /* ===== Header & Nav ===== */
        .header {
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            height: var(--header-h);
            background: rgba(255,255,255,0.92);
            backdrop-filter: blur(16px);
            -webkit-backdrop-filter: blur(16px);
            border-bottom: 1px solid rgba(226,232,240,0.5);
            z-index: 1000;
            transition: var(--transition);
        }
        .header .container {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 100%;
        }
        .logo {
            font-size: 1.35rem;
            font-weight: 800;
            color: var(--text);
            letter-spacing: -0.3px;
            display: flex;
            align-items: center;
            gap: 8px;
        }
        .logo i {
            color: var(--primary);
            font-size: 1.5rem;
        }
        .logo span { background: linear-gradient(135deg, var(--primary), var(--secondary)); -webkit-background-clip: text; -webkit-text-fill-color: transparent; background-clip: text; }
        .nav-list {
            display: flex;
            align-items: center;
            gap: 4px;
        }
        .nav-list a {
            padding: 8px 18px;
            border-radius: 50px;
            font-size: 0.95rem;
            font-weight: 500;
            color: var(--text-light);
            transition: var(--transition);
            position: relative;
        }
        .nav-list a:hover { color: var(--primary); background: var(--primary-light); }
        .nav-list a.active {
            color: var(--primary);
            background: var(--primary-light);
            font-weight: 600;
        }
        .nav-list a.active::after {
            content: '';
            position: absolute;
            bottom: 2px;
            left: 50%;
            transform: translateX(-50%);
            width: 20px;
            height: 3px;
            background: var(--primary);
            border-radius: 4px;
        }
        .nav-toggle {
            display: none;
            background: none;
            border: none;
            font-size: 1.5rem;
            color: var(--text);
            cursor: pointer;
            padding: 8px;
        }
        .mobile-menu {
            display: none;
            position: fixed;
            top: var(--header-h);
            left: 0;
            width: 100%;
            background: var(--bg);
            border-bottom: 1px solid var(--border);
            box-shadow: var(--shadow-lg);
            padding: 20px 24px;
            z-index: 999;
            flex-direction: column;
            gap: 8px;
        }
        .mobile-menu.open { display: flex; }
        .mobile-menu a {
            padding: 12px 16px;
            border-radius: var(--radius-sm);
            font-size: 1.05rem;
            font-weight: 500;
            color: var(--text-light);
        }
        .mobile-menu a:hover { background: var(--primary-light); color: var(--primary); }
        .mobile-menu a.active { background: var(--primary-light); color: var(--primary); font-weight: 600; }

        /* ===== Hero ===== */
        .hero {
            padding: 140px 0 80px;
            background: linear-gradient(135deg, #0f172a 0%, #1e293b 50%, #1a2a4a 100%);
            color: var(--text-white);
            position: relative;
            overflow: hidden;
        }
        .hero::before {
            content: '';
            position: absolute;
            top: -40%;
            right: -20%;
            width: 600px;
            height: 600px;
            background: radial-gradient(circle, rgba(26,86,219,0.20) 0%, transparent 70%);
            border-radius: 50%;
            pointer-events: none;
        }
        .hero::after {
            content: '';
            position: absolute;
            bottom: -30%;
            left: -10%;
            width: 500px;
            height: 500px;
            background: radial-gradient(circle, rgba(124,58,237,0.15) 0%, transparent 70%);
            border-radius: 50%;
            pointer-events: none;
        }
        .hero .container { position: relative; z-index: 1; }
        .hero-content {
            max-width: 720px;
            margin: 0 auto;
            text-align: center;
        }
        .hero-badge {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            background: rgba(255,255,255,0.10);
            border: 1px solid rgba(255,255,255,0.15);
            padding: 6px 18px;
            border-radius: 50px;
            font-size: 0.85rem;
            font-weight: 500;
            color: rgba(255,255,255,0.85);
            margin-bottom: 24px;
            backdrop-filter: blur(4px);
        }
        .hero-badge i { color: var(--accent); }
        .hero h1 {
            font-size: 3.5rem;
            font-weight: 900;
            letter-spacing: -1px;
            line-height: 1.1;
            margin-bottom: 20px;
        }
        .hero h1 span {
            background: linear-gradient(135deg, #60a5fa, #a78bfa, #fbbf24);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }
        .hero p {
            font-size: 1.2rem;
            color: rgba(255,255,255,0.7);
            max-width: 560px;
            margin: 0 auto 36px;
            line-height: 1.8;
        }
        .hero-actions {
            display: flex;
            justify-content: center;
            gap: 16px;
            flex-wrap: wrap;
        }
        .hero-stats {
            display: flex;
            justify-content: center;
            gap: 40px;
            margin-top: 60px;
            flex-wrap: wrap;
        }
        .hero-stat { text-align: center; }
        .hero-stat .num {
            font-size: 2rem;
            font-weight: 800;
            color: var(--text-white);
        }
        .hero-stat .label {
            font-size: 0.9rem;
            color: rgba(255,255,255,0.6);
            margin-top: 2px;
        }

        /* ===== Intro ===== */
        .intro-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 48px;
            align-items: center;
        }
        .intro-text h2 { font-size: 2rem; margin-bottom: 16px; }
        .intro-text p { font-size: 1.05rem; line-height: 1.8; margin-bottom: 20px; }
        .intro-features {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 16px;
            margin-top: 28px;
        }
        .intro-feature {
            display: flex;
            align-items: center;
            gap: 12px;
            background: var(--bg-alt);
            padding: 14px 18px;
            border-radius: var(--radius-sm);
            font-weight: 500;
            font-size: 0.95rem;
        }
        .intro-feature i { color: var(--primary); font-size: 1.1rem; }
        .intro-image {
            background: linear-gradient(135deg, var(--primary-light), var(--secondary-light));
            border-radius: var(--radius-lg);
            padding: 40px;
            display: flex;
            align-items: center;
            justify-content: center;
            min-height: 340px;
            position: relative;
            overflow: hidden;
        }
        .intro-image i {
            font-size: 5rem;
            color: var(--primary);
            opacity: 0.3;
        }
        .intro-image::after {
            content: '';
            position: absolute;
            width: 200px;
            height: 200px;
            border-radius: 50%;
            background: rgba(26,86,219,0.08);
            top: -40px;
            right: -40px;
        }

        /* ===== Advantages ===== */
        .advantages-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 24px;
        }
        .advantage-card {
            background: var(--bg);
            border-radius: var(--radius);
            padding: 32px 24px;
            box-shadow: var(--shadow);
            border: 1px solid var(--border);
            transition: var(--transition);
            text-align: center;
        }
        .advantage-card:hover {
            transform: translateY(-6px);
            box-shadow: var(--shadow-lg);
            border-color: var(--primary-light);
        }
        .advantage-card .icon {
            width: 60px;
            height: 60px;
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            margin: 0 auto 18px;
            font-size: 1.5rem;
            color: var(--primary);
            background: var(--primary-light);
        }
        .advantage-card:nth-child(2) .icon { background: var(--secondary-light); color: var(--secondary); }
        .advantage-card:nth-child(3) .icon { background: var(--accent-light); color: var(--accent); }
        .advantage-card:nth-child(4) .icon { background: #dbeafe; color: #1e40af; }
        .advantage-card h3 { font-size: 1.15rem; margin-bottom: 8px; }
        .advantage-card p { font-size: 0.95rem; margin-bottom: 0; }

        /* ===== Categories ===== */
        .categories-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 28px;
        }
        .category-card {
            border-radius: var(--radius-lg);
            padding: 40px 36px;
            transition: var(--transition);
            position: relative;
            overflow: hidden;
            min-height: 260px;
            display: flex;
            flex-direction: column;
            justify-content: center;
        }
        .category-card::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            opacity: 0.06;
            background-image: radial-gradient(circle at 20% 50%, currentColor 1px, transparent 1px);
            background-size: 24px 24px;
            pointer-events: none;
        }
        .category-card.cat-guide {
            background: linear-gradient(135deg, #1a56db, #3b82f6);
            color: var(--text-white);
        }
        .category-card.cat-review {
            background: linear-gradient(135deg, #7c3aed, #a78bfa);
            color: var(--text-white);
        }
        .category-card .cat-icon {
            font-size: 2.5rem;
            margin-bottom: 16px;
            opacity: 0.9;
        }
        .category-card h3 { font-size: 1.65rem; margin-bottom: 8px; }
        .category-card p { font-size: 1rem; opacity: 0.85; margin-bottom: 20px; color: inherit; }
        .category-card .cat-link {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            font-weight: 600;
            color: inherit;
            border-bottom: 2px solid rgba(255,255,255,0.4);
            padding-bottom: 4px;
            align-self: flex-start;
        }
        .category-card .cat-link:hover { border-bottom-color: var(--text-white); gap: 12px; }

        /* ===== Latest Posts ===== */
        .posts-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 24px;
        }
        .post-card {
            background: var(--bg);
            border-radius: var(--radius);
            overflow: hidden;
            box-shadow: var(--shadow);
            border: 1px solid var(--border);
            transition: var(--transition);
            display: flex;
            flex-direction: column;
        }
        .post-card:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow-lg);
        }
        .post-card .thumb {
            height: 180px;
            background: linear-gradient(135deg, var(--primary-light), var(--secondary-light));
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 2.5rem;
            color: var(--primary);
            opacity: 0.5;
        }
        .post-card .body {
            padding: 20px 24px 24px;
            flex: 1;
            display: flex;
            flex-direction: column;
        }
        .post-card .cat-tag {
            display: inline-block;
            font-size: 0.75rem;
            font-weight: 600;
            color: var(--primary);
            background: var(--primary-light);
            padding: 2px 12px;
            border-radius: 50px;
            margin-bottom: 10px;
            align-self: flex-start;
        }
        .post-card h3 {
            font-size: 1.1rem;
            font-weight: 700;
            margin-bottom: 8px;
            line-height: 1.4;
        }
        .post-card h3 a { color: var(--text); }
        .post-card h3 a:hover { color: var(--primary); }
        .post-card .excerpt {
            font-size: 0.9rem;
            color: var(--text-light);
            flex: 1;
            margin-bottom: 12px;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }
        .post-card .meta {
            font-size: 0.8rem;
            color: var(--text-light);
            display: flex;
            align-items: center;
            gap: 16px;
            border-top: 1px solid var(--border);
            padding-top: 12px;
        }
        .post-card .meta i { margin-right: 4px; font-size: 0.75rem; }
        .posts-empty {
            grid-column: 1 / -1;
            text-align: center;
            padding: 60px 20px;
            color: var(--text-light);
            font-size: 1.05rem;
        }
        .posts-empty i { font-size: 2.5rem; display: block; margin-bottom: 16px; opacity: 0.4; }

        /* ===== Stats ===== */
        .stats-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 28px;
        }
        .stat-item {
            text-align: center;
            padding: 32px 16px;
            background: rgba(255,255,255,0.05);
            border-radius: var(--radius);
            border: 1px solid rgba(255,255,255,0.08);
        }
        .stat-item .num {
            font-size: 2.5rem;
            font-weight: 800;
            color: var(--text-white);
            line-height: 1.2;
        }
        .stat-item .num span { color: var(--accent); }
        .stat-item .label {
            font-size: 0.95rem;
            color: rgba(255,255,255,0.65);
            margin-top: 6px;
        }

        /* ===== Steps ===== */
        .steps-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 24px;
            counter-reset: step;
        }
        .step-card {
            background: var(--bg);
            border-radius: var(--radius);
            padding: 32px 24px;
            box-shadow: var(--shadow);
            border: 1px solid var(--border);
            text-align: center;
            position: relative;
            transition: var(--transition);
        }
        .step-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-lg); }
        .step-card .step-num {
            width: 48px;
            height: 48px;
            border-radius: 50%;
            background: var(--primary);
            color: var(--text-white);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.2rem;
            font-weight: 700;
            margin: 0 auto 16px;
        }
        .step-card h3 { font-size: 1.1rem; margin-bottom: 8px; }
        .step-card p { font-size: 0.9rem; margin-bottom: 0; }

        /* ===== FAQ ===== */
        .faq-list {
            max-width: 800px;
            margin: 0 auto;
            display: flex;
            flex-direction: column;
            gap: 12px;
        }
        .faq-item {
            border: 1px solid var(--border);
            border-radius: var(--radius);
            overflow: hidden;
            transition: var(--transition);
            background: var(--bg);
        }
        .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;
            user-select: none;
            transition: var(--transition);
        }
        .faq-question:hover { background: var(--bg-alt); }
        .faq-question i {
            transition: var(--transition);
            color: var(--text-light);
            font-size: 0.9rem;
            flex-shrink: 0;
        }
        .faq-item.active .faq-question i { transform: rotate(180deg); color: var(--primary); }
        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.4s ease, padding 0.3s ease;
            padding: 0 24px;
            color: var(--text-light);
            line-height: 1.7;
        }
        .faq-item.active .faq-answer {
            max-height: 300px;
            padding: 0 24px 20px;
        }

        /* ===== CTA ===== */
        .cta-box {
            background: linear-gradient(135deg, var(--primary), var(--secondary));
            border-radius: var(--radius-lg);
            padding: 60px 48px;
            text-align: center;
            color: var(--text-white);
            position: relative;
            overflow: hidden;
        }
        .cta-box::before {
            content: '';
            position: absolute;
            top: -60%;
            right: -30%;
            width: 400px;
            height: 400px;
            border-radius: 50%;
            background: rgba(255,255,255,0.05);
            pointer-events: none;
        }
        .cta-box h2 { font-size: 2rem; margin-bottom: 12px; color: var(--text-white); }
        .cta-box p { color: rgba(255,255,255,0.8); font-size: 1.05rem; max-width: 560px; margin: 0 auto 28px; }
        .cta-box .btn { background: var(--text-white); color: var(--primary); box-shadow: 0 4px 20px rgba(0,0,0,0.15); }
        .cta-box .btn:hover { background: #f1f5f9; transform: translateY(-2px); }

        /* ===== Footer ===== */
        .footer {
            background: var(--bg-dark);
            color: rgba(255,255,255,0.7);
            padding: 48px 0 32px;
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr 1fr;
            gap: 40px;
            margin-bottom: 32px;
        }
        .footer-brand .logo { color: var(--text-white); margin-bottom: 12px; }
        .footer-brand .logo span { -webkit-text-fill-color: var(--text-white); }
        .footer-brand p { font-size: 0.9rem; color: rgba(255,255,255,0.55); max-width: 320px; }
        .footer-col h4 { color: var(--text-white); font-size: 1rem; margin-bottom: 16px; font-weight: 600; }
        .footer-col a {
            display: block;
            padding: 4px 0;
            font-size: 0.9rem;
            color: rgba(255,255,255,0.55);
        }
        .footer-col a:hover { color: var(--text-white); }
        .footer-bottom {
            border-top: 1px solid rgba(255,255,255,0.08);
            padding-top: 24px;
            display: flex;
            justify-content: space-between;
            align-items: center;
            flex-wrap: wrap;
            gap: 12px;
            font-size: 0.85rem;
            color: rgba(255,255,255,0.4);
        }
        .footer-bottom a { color: rgba(255,255,255,0.5); }
        .footer-bottom a:hover { color: var(--text-white); }

        /* ===== Responsive ===== */
        @media (max-width: 1024px) {
            .advantages-grid { grid-template-columns: repeat(2, 1fr); }
            .stats-grid { grid-template-columns: repeat(2, 1fr); }
            .steps-grid { grid-template-columns: repeat(2, 1fr); }
            .posts-grid { grid-template-columns: repeat(2, 1fr); }
            .footer-grid { grid-template-columns: 1fr 1fr; }
        }
        @media (max-width: 768px) {
            .nav-list { display: none; }
            .nav-toggle { display: block; }
            .hero { padding: 120px 0 60px; }
            .hero h1 { font-size: 2.5rem; }
            .hero p { font-size: 1rem; }
            .hero-stats { gap: 24px; margin-top: 40px; }
            .hero-stat .num { font-size: 1.6rem; }
            .intro-grid { grid-template-columns: 1fr; gap: 32px; }
            .intro-features { grid-template-columns: 1fr; }
            .categories-grid { grid-template-columns: 1fr; }
            .posts-grid { grid-template-columns: 1fr; }
            .section { padding: 56px 0; }
            .section-title { font-size: 1.75rem; }
            .stats-grid { grid-template-columns: 1fr 1fr; gap: 16px; }
            .steps-grid { grid-template-columns: 1fr 1fr; gap: 16px; }
            .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; }
            .advantages-grid { grid-template-columns: 1fr; }
            .hero-actions .btn { width: 100%; }
        }
        @media (max-width: 520px) {
            .container { padding: 0 16px; }
            .hero h1 { font-size: 1.9rem; }
            .hero-stats { flex-direction: column; gap: 16px; }
            .stats-grid { grid-template-columns: 1fr; }
            .steps-grid { grid-template-columns: 1fr; }
            .section-title { font-size: 1.5rem; }
            .category-card { padding: 28px 20px; min-height: 200px; }
            .category-card h3 { font-size: 1.3rem; }
            .logo { font-size: 1.15rem; }
        }

        /* ===== Accessibility ===== */
        :focus-visible { outline: 3px solid var(--primary); outline-offset: 2px; }
        .sr-only { position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px; overflow: hidden; clip: rect(0,0,0,0); white-space: nowrap; border-width: 0; }

/* roulang page: article */
/* ===== Design Variables ===== */
    :root {
        --primary: #2563eb;
        --primary-light: #3b82f6;
        --primary-dark: #1d4ed8;
        --primary-bg: #eff6ff;
        --secondary: #0f172a;
        --secondary-light: #1e293b;
        --accent: #f59e0b;
        --accent-light: #fbbf24;
        --success: #10b981;
        --text: #1e293b;
        --text-light: #64748b;
        --text-white: #f8fafc;
        --bg: #ffffff;
        --bg-alt: #f8fafc;
        --bg-card: #ffffff;
        --border: #e2e8f0;
        --border-light: #f1f5f9;
        --radius: 16px;
        --radius-sm: 8px;
        --radius-lg: 24px;
        --shadow: 0 4px 24px rgba(0,0,0,0.06);
        --shadow-lg: 0 12px 48px rgba(0,0,0,0.10);
        --shadow-hover: 0 16px 48px rgba(37,99,235,0.12);
        --transition: 0.3s cubic-bezier(0.4,0,0.2,1);
        --font: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Helvetica, Arial, sans-serif;
        --max-width: 1200px;
        --header-height: 72px;
    }

    /* ===== Reset & Base ===== */
    *, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
    html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }
    body {
        font-family: var(--font);
        color: var(--text);
        background: var(--bg);
        line-height: 1.7;
        font-size: 16px;
        -webkit-font-smoothing: antialiased;
        -moz-osx-font-smoothing: grayscale;
    }
    a { color: var(--primary); text-decoration: none; transition: color var(--transition); }
    a:hover { color: var(--primary-dark); }
    img { max-width: 100%; height: auto; display: block; }
    button, input, textarea { font-family: inherit; font-size: inherit; }
    ul, ol { list-style: none; }
    h1, h2, h3, h4, h5, h6 { line-height: 1.3; font-weight: 700; color: var(--secondary); }
    .container {
        max-width: var(--max-width);
        margin: 0 auto;
        padding: 0 24px;
    }

    /* ===== Header & Nav ===== */
    .header {
        position: sticky;
        top: 0;
        z-index: 1000;
        background: rgba(255,255,255,0.92);
        backdrop-filter: blur(20px);
        -webkit-backdrop-filter: blur(20px);
        border-bottom: 1px solid var(--border-light);
        height: var(--header-height);
        display: flex;
        align-items: center;
        transition: box-shadow var(--transition);
    }
    .header.scrolled { box-shadow: 0 4px 32px rgba(0,0,0,0.06); }
    .header .container {
        display: flex;
        align-items: center;
        justify-content: space-between;
        width: 100%;
    }
    .logo {
        display: flex;
        align-items: center;
        gap: 10px;
        font-size: 22px;
        font-weight: 800;
        color: var(--secondary);
        letter-spacing: -0.5px;
    }
    .logo i { color: var(--primary); font-size: 26px; }
    .logo span { background: linear-gradient(135deg, var(--secondary), var(--primary)); -webkit-background-clip: text; -webkit-text-fill-color: transparent; background-clip: text; }
    .nav-list {
        display: flex;
        align-items: center;
        gap: 4px;
    }
    .nav-list a {
        padding: 8px 20px;
        border-radius: 100px;
        font-weight: 500;
        font-size: 15px;
        color: var(--text-light);
        transition: all var(--transition);
        position: relative;
    }
    .nav-list a:hover { color: var(--primary); background: var(--primary-bg); }
    .nav-list a.active {
        color: var(--primary);
        background: var(--primary-bg);
        font-weight: 600;
    }
    .nav-toggle {
        display: none;
        background: none;
        border: none;
        font-size: 26px;
        color: var(--secondary);
        cursor: pointer;
        padding: 8px;
        border-radius: var(--radius-sm);
        transition: background var(--transition);
    }
    .nav-toggle:hover { background: var(--bg-alt); }

    /* ===== Article Hero ===== */
    .article-hero {
        background: linear-gradient(135deg, var(--primary-bg) 0%, #dbeafe 100%);
        padding: 60px 0 40px;
        border-bottom: 1px solid var(--border-light);
    }
    .article-hero .container { max-width: 800px; }
    .article-breadcrumb {
        display: flex;
        align-items: center;
        gap: 8px;
        font-size: 14px;
        color: var(--text-light);
        margin-bottom: 20px;
        flex-wrap: wrap;
    }
    .article-breadcrumb a { color: var(--text-light); }
    .article-breadcrumb a:hover { color: var(--primary); }
    .article-breadcrumb .sep { color: var(--border); }
    .article-breadcrumb .current { color: var(--primary); font-weight: 500; }
    .article-category-badge {
        display: inline-block;
        padding: 4px 16px;
        border-radius: 100px;
        background: var(--primary);
        color: #fff;
        font-size: 13px;
        font-weight: 600;
        letter-spacing: 0.3px;
        margin-bottom: 16px;
    }
    .article-hero h1 {
        font-size: 36px;
        font-weight: 800;
        line-height: 1.25;
        color: var(--secondary);
        margin-bottom: 16px;
        letter-spacing: -1px;
    }
    .article-meta {
        display: flex;
        align-items: center;
        gap: 20px;
        font-size: 14px;
        color: var(--text-light);
        flex-wrap: wrap;
    }
    .article-meta i { margin-right: 6px; color: var(--primary); }
    .article-meta span { display: inline-flex; align-items: center; }

    /* ===== Article Content ===== */
    .article-main {
        padding: 48px 0 64px;
    }
    .article-main .container { max-width: 800px; }
    .article-body {
        background: var(--bg);
        border-radius: var(--radius);
        padding: 40px 48px;
        box-shadow: var(--shadow);
        border: 1px solid var(--border-light);
    }
    .article-body h2 {
        font-size: 26px;
        margin-top: 40px;
        margin-bottom: 16px;
        color: var(--secondary);
        border-bottom: 2px solid var(--primary-bg);
        padding-bottom: 10px;
    }
    .article-body h3 {
        font-size: 22px;
        margin-top: 32px;
        margin-bottom: 12px;
        color: var(--secondary-light);
    }
    .article-body p {
        margin-bottom: 18px;
        color: var(--text);
        font-size: 16.5px;
        line-height: 1.85;
    }
    .article-body ul, .article-body ol {
        margin-bottom: 18px;
        padding-left: 24px;
    }
    .article-body li {
        margin-bottom: 8px;
        font-size: 16.5px;
        line-height: 1.75;
        color: var(--text);
        list-style: disc;
    }
    .article-body ol li { list-style: decimal; }
    .article-body blockquote {
        border-left: 4px solid var(--primary);
        background: var(--primary-bg);
        padding: 16px 24px;
        margin: 24px 0;
        border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
        font-style: italic;
        color: var(--secondary-light);
    }
    .article-body code {
        background: var(--bg-alt);
        padding: 2px 10px;
        border-radius: 4px;
        font-size: 14px;
        color: var(--primary-dark);
        border: 1px solid var(--border-light);
    }
    .article-body pre {
        background: var(--secondary);
        color: var(--text-white);
        padding: 24px;
        border-radius: var(--radius-sm);
        overflow-x: auto;
        margin: 24px 0;
        font-size: 14px;
        line-height: 1.6;
    }
    .article-body pre code {
        background: none;
        color: inherit;
        border: none;
        padding: 0;
    }
    .article-body img {
        border-radius: var(--radius-sm);
        margin: 24px auto;
        box-shadow: var(--shadow);
    }
    .article-body a { text-decoration: underline; text-underline-offset: 3px; }
    .article-tags {
        display: flex;
        flex-wrap: wrap;
        gap: 10px;
        margin-top: 32px;
        padding-top: 24px;
        border-top: 1px solid var(--border-light);
    }
    .article-tags .tag {
        padding: 4px 16px;
        border-radius: 100px;
        background: var(--bg-alt);
        color: var(--text-light);
        font-size: 13px;
        font-weight: 500;
        border: 1px solid var(--border);
        transition: all var(--transition);
    }
    .article-tags .tag:hover { background: var(--primary-bg); color: var(--primary); border-color: var(--primary-light); }
    .article-nav {
        display: flex;
        justify-content: space-between;
        margin-top: 40px;
        padding-top: 24px;
        border-top: 1px solid var(--border-light);
        gap: 16px;
        flex-wrap: wrap;
    }
    .article-nav a {
        display: inline-flex;
        align-items: center;
        gap: 8px;
        padding: 10px 24px;
        border-radius: 100px;
        background: var(--bg-alt);
        color: var(--text);
        font-weight: 500;
        font-size: 14px;
        border: 1px solid var(--border);
        transition: all var(--transition);
    }
    .article-nav a:hover { background: var(--primary-bg); color: var(--primary); border-color: var(--primary-light); transform: translateY(-2px); }

    /* ===== Related Posts ===== */
    .related-section {
        padding: 48px 0 64px;
        background: var(--bg-alt);
    }
    .related-section .section-title {
        text-align: center;
        margin-bottom: 40px;
    }
    .related-section .section-title h2 {
        font-size: 30px;
        font-weight: 800;
        color: var(--secondary);
        letter-spacing: -0.5px;
    }
    .related-section .section-title p {
        color: var(--text-light);
        font-size: 16px;
        margin-top: 8px;
    }
    .related-grid {
        display: grid;
        grid-template-columns: repeat(3, 1fr);
        gap: 28px;
    }
    .related-card {
        background: var(--bg-card);
        border-radius: var(--radius);
        border: 1px solid var(--border-light);
        padding: 28px;
        transition: all var(--transition);
        box-shadow: var(--shadow);
    }
    .related-card:hover {
        transform: translateY(-4px);
        box-shadow: var(--shadow-hover);
        border-color: var(--primary-bg);
    }
    .related-card .card-category {
        display: inline-block;
        padding: 2px 12px;
        border-radius: 100px;
        background: var(--primary-bg);
        color: var(--primary);
        font-size: 12px;
        font-weight: 600;
        margin-bottom: 12px;
    }
    .related-card h3 {
        font-size: 18px;
        font-weight: 700;
        margin-bottom: 10px;
        line-height: 1.4;
    }
    .related-card h3 a { color: var(--secondary); }
    .related-card h3 a:hover { color: var(--primary); }
    .related-card p {
        font-size: 14px;
        color: var(--text-light);
        line-height: 1.6;
        margin-bottom: 14px;
    }
    .related-card .card-meta {
        display: flex;
        align-items: center;
        gap: 12px;
        font-size: 12px;
        color: var(--text-light);
    }
    .related-card .card-meta i { margin-right: 4px; color: var(--primary); }

    /* ===== CTA Section ===== */
    .cta-section {
        padding: 64px 0;
        background: linear-gradient(135deg, var(--secondary) 0%, var(--primary-dark) 100%);
        text-align: center;
        color: #fff;
    }
    .cta-section h2 {
        font-size: 32px;
        font-weight: 800;
        color: #fff;
        margin-bottom: 12px;
        letter-spacing: -0.5px;
    }
    .cta-section p {
        font-size: 17px;
        color: rgba(255,255,255,0.85);
        max-width: 600px;
        margin: 0 auto 28px;
    }
    .cta-btn {
        display: inline-flex;
        align-items: center;
        gap: 10px;
        padding: 14px 40px;
        border-radius: 100px;
        background: var(--accent);
        color: var(--secondary);
        font-weight: 700;
        font-size: 16px;
        border: none;
        cursor: pointer;
        transition: all var(--transition);
        box-shadow: 0 8px 32px rgba(245,158,11,0.30);
    }
    .cta-btn:hover { background: var(--accent-light); transform: translateY(-2px); box-shadow: 0 12px 40px rgba(245,158,11,0.40); color: var(--secondary); }

    /* ===== Footer ===== */
    .footer {
        background: var(--secondary);
        color: rgba(255,255,255,0.75);
        padding: 56px 0 0;
    }
    .footer-grid {
        display: grid;
        grid-template-columns: 2fr 1fr 1fr 1fr;
        gap: 40px;
        padding-bottom: 40px;
        border-bottom: 1px solid rgba(255,255,255,0.08);
    }
    .footer-brand .logo { color: #fff; margin-bottom: 16px; }
    .footer-brand .logo span { -webkit-text-fill-color: #fff; background: none; }
    .footer-brand .logo i { color: var(--accent); }
    .footer-brand p { font-size: 14px; line-height: 1.7; color: rgba(255,255,255,0.6); max-width: 320px; }
    .footer-col h4 {
        color: #fff;
        font-size: 15px;
        font-weight: 700;
        margin-bottom: 18px;
        letter-spacing: 0.5px;
    }
    .footer-col a {
        display: block;
        color: rgba(255,255,255,0.6);
        font-size: 14px;
        padding: 5px 0;
        transition: all var(--transition);
    }
    .footer-col a:hover { color: var(--accent); padding-left: 4px; }
    .footer-bottom {
        display: flex;
        justify-content: space-between;
        align-items: center;
        padding: 24px 0;
        font-size: 13px;
        color: rgba(255,255,255,0.4);
        flex-wrap: wrap;
        gap: 12px;
    }
    .footer-bottom a { color: rgba(255,255,255,0.5); }
    .footer-bottom a:hover { color: var(--accent); }

    /* ===== Not Found ===== */
    .not-found {
        text-align: center;
        padding: 80px 20px;
    }
    .not-found i { font-size: 64px; color: var(--border); margin-bottom: 24px; }
    .not-found h2 { font-size: 28px; color: var(--secondary); margin-bottom: 12px; }
    .not-found p { color: var(--text-light); margin-bottom: 24px; }
    .not-found .btn-back {
        display: inline-flex;
        align-items: center;
        gap: 8px;
        padding: 12px 32px;
        border-radius: 100px;
        background: var(--primary);
        color: #fff;
        font-weight: 600;
        transition: all var(--transition);
    }
    .not-found .btn-back:hover { background: var(--primary-dark); transform: translateY(-2px); color: #fff; }

    /* ===== Responsive ===== */
    @media (max-width: 1024px) {
        .related-grid { grid-template-columns: repeat(2, 1fr); }
        .footer-grid { grid-template-columns: 1fr 1fr; }
        .article-hero h1 { font-size: 30px; }
        .article-body { padding: 32px 28px; }
    }
    @media (max-width: 768px) {
        .nav-list { display: none; }
        .nav-toggle { display: block; }
        .nav-list.open {
            display: flex;
            flex-direction: column;
            position: absolute;
            top: var(--header-height);
            left: 0;
            right: 0;
            background: rgba(255,255,255,0.98);
            backdrop-filter: blur(20px);
            -webkit-backdrop-filter: blur(20px);
            padding: 16px 24px;
            border-bottom: 1px solid var(--border-light);
            box-shadow: var(--shadow-lg);
            gap: 6px;
        }
        .nav-list.open a { padding: 12px 20px; border-radius: var(--radius-sm); }
        .article-hero { padding: 40px 0 28px; }
        .article-hero h1 { font-size: 26px; }
        .article-meta { gap: 12px; font-size: 13px; }
        .article-body { padding: 24px 20px; }
        .article-body h2 { font-size: 22px; }
        .article-body h3 { font-size: 18px; }
        .article-body p, .article-body li { font-size: 15px; }
        .related-grid { grid-template-columns: 1fr; gap: 20px; }
        .cta-section h2 { font-size: 26px; }
        .cta-section p { font-size: 15px; }
        .footer-grid { grid-template-columns: 1fr; gap: 28px; }
        .footer-bottom { flex-direction: column; text-align: center; }
        .article-nav { flex-direction: column; align-items: stretch; }
        .article-nav a { justify-content: center; }
    }
    @media (max-width: 520px) {
        .container { padding: 0 16px; }
        .article-hero h1 { font-size: 22px; }
        .article-body { padding: 16px 16px; border-radius: var(--radius-sm); }
        .related-card { padding: 20px; }
        .cta-btn { padding: 12px 28px; font-size: 15px; }
        .logo { font-size: 18px; }
        .logo i { font-size: 22px; }
    }

/* roulang page: category1 */
/* ===== 设计变量 ===== */
        :root {
            --primary: #2563eb;
            --primary-dark: #1d4ed8;
            --primary-light: #dbeafe;
            --secondary: #f59e0b;
            --secondary-light: #fef3c7;
            --accent: #10b981;
            --bg: #ffffff;
            --bg-alt: #f8fafc;
            --bg-dark: #0f172a;
            --text: #1e293b;
            --text-light: #64748b;
            --text-white: #ffffff;
            --border: #e2e8f0;
            --radius: 12px;
            --radius-sm: 8px;
            --radius-lg: 20px;
            --shadow: 0 4px 20px rgba(0, 0, 0, 0.06);
            --shadow-md: 0 8px 32px rgba(0, 0, 0, 0.10);
            --shadow-lg: 0 16px 48px rgba(0, 0, 0, 0.14);
            --transition: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
            --font: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
            --max-width: 1200px;
            --header-h: 72px;
        }

        /* ===== 基础重置 ===== */
        *,
        *::before,
        *::after {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
        }

        html {
            scroll-behavior: smooth;
            -webkit-text-size-adjust: 100%;
        }

        body {
            font-family: var(--font);
            font-size: 1rem;
            line-height: 1.7;
            color: var(--text);
            background: var(--bg);
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
        }

        img {
            max-width: 100%;
            height: auto;
            display: block;
        }

        a {
            color: var(--primary);
            text-decoration: none;
            transition: color var(--transition);
        }
        a:hover {
            color: var(--primary-dark);
        }

        button,
        input,
        textarea {
            font-family: inherit;
            font-size: inherit;
            line-height: inherit;
        }

        ul,
        ol {
            list-style: none;
        }

        h1,
        h2,
        h3,
        h4,
        h5,
        h6 {
            line-height: 1.3;
            font-weight: 700;
            color: var(--text);
        }

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

        /* ===== 导航 ===== */
        .header {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            z-index: 1000;
            height: var(--header-h);
            background: rgba(255, 255, 255, 0.95);
            backdrop-filter: blur(16px);
            -webkit-backdrop-filter: blur(16px);
            border-bottom: 1px solid var(--border);
            transition: background var(--transition), box-shadow var(--transition);
        }

        .header.scrolled {
            background: rgba(255, 255, 255, 0.98);
            box-shadow: 0 2px 24px rgba(0, 0, 0, 0.06);
        }

        .header .container {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 100%;
        }

        .logo {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 1.35rem;
            font-weight: 700;
            color: var(--text);
        }
        .logo i {
            font-size: 1.5rem;
            color: var(--primary);
        }
        .logo span {
            background: linear-gradient(135deg, var(--primary), var(--accent));
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }

        .nav-list {
            display: flex;
            align-items: center;
            gap: 4px;
        }
        .nav-list a {
            position: relative;
            display: block;
            padding: 8px 20px;
            font-size: 0.95rem;
            font-weight: 500;
            color: var(--text-light);
            border-radius: var(--radius-sm);
            transition: all var(--transition);
        }
        .nav-list a:hover {
            color: var(--primary);
            background: var(--primary-light);
        }
        .nav-list a.active,
        .nav-list a[aria-current="page"] {
            color: var(--primary);
            background: var(--primary-light);
            font-weight: 600;
        }
        .nav-list a.active::after {
            content: '';
            position: absolute;
            bottom: 2px;
            left: 50%;
            transform: translateX(-50%);
            width: 20px;
            height: 3px;
            border-radius: 2px;
            background: var(--primary);
        }

        .hamburger {
            display: none;
            flex-direction: column;
            justify-content: center;
            align-items: center;
            width: 44px;
            height: 44px;
            background: transparent;
            border: none;
            cursor: pointer;
            border-radius: var(--radius-sm);
            transition: background var(--transition);
            padding: 0;
        }
        .hamburger:hover {
            background: var(--bg-alt);
        }
        .hamburger span {
            display: block;
            width: 22px;
            height: 2.5px;
            background: var(--text);
            border-radius: 2px;
            transition: all var(--transition);
        }
        .hamburger span+span {
            margin-top: 5px;
        }
        .hamburger.active span:nth-child(1) {
            transform: rotate(45deg) translate(5px, 5px);
        }
        .hamburger.active span:nth-child(2) {
            opacity: 0;
            transform: scaleX(0);
        }
        .hamburger.active span:nth-child(3) {
            transform: rotate(-45deg) translate(5px, -5px);
        }

        /* ===== 移动端导航 ===== */
        .mobile-nav {
            display: none;
            position: fixed;
            top: var(--header-h);
            left: 0;
            right: 0;
            background: rgba(255, 255, 255, 0.98);
            backdrop-filter: blur(16px);
            -webkit-backdrop-filter: blur(16px);
            border-bottom: 1px solid var(--border);
            padding: 16px 24px 24px;
            box-shadow: var(--shadow-md);
            z-index: 999;
            transform: translateY(-10px);
            opacity: 0;
            transition: all var(--transition);
            pointer-events: none;
        }
        .mobile-nav.open {
            transform: translateY(0);
            opacity: 1;
            pointer-events: auto;
        }
        .mobile-nav a {
            display: block;
            padding: 12px 16px;
            font-size: 1.05rem;
            font-weight: 500;
            color: var(--text-light);
            border-radius: var(--radius-sm);
            transition: all var(--transition);
        }
        .mobile-nav a:hover {
            background: var(--primary-light);
            color: var(--primary);
        }
        .mobile-nav a.active {
            color: var(--primary);
            background: var(--primary-light);
            font-weight: 600;
        }

        /* ===== Hero 区 ===== */
        .category-hero {
            padding: 120px 0 72px;
            background: linear-gradient(135deg, #eff6ff 0%, #f0fdf4 50%, #fefce8 100%);
            position: relative;
            overflow: hidden;
        }
        .category-hero::before {
            content: '';
            position: absolute;
            top: -40%;
            right: -20%;
            width: 500px;
            height: 500px;
            border-radius: 50%;
            background: radial-gradient(circle, rgba(37, 99, 235, 0.08), transparent 70%);
            pointer-events: none;
        }
        .category-hero::after {
            content: '';
            position: absolute;
            bottom: -30%;
            left: -10%;
            width: 400px;
            height: 400px;
            border-radius: 50%;
            background: radial-gradient(circle, rgba(16, 185, 129, 0.06), transparent 70%);
            pointer-events: none;
        }
        .category-hero .container {
            position: relative;
            z-index: 1;
            text-align: center;
        }
        .category-hero .hero-badge {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            padding: 6px 18px;
            border-radius: 50px;
            background: var(--primary-light);
            color: var(--primary);
            font-size: 0.85rem;
            font-weight: 600;
            margin-bottom: 20px;
        }
        .category-hero h1 {
            font-size: 3rem;
            font-weight: 800;
            color: var(--text);
            margin-bottom: 16px;
            letter-spacing: -0.02em;
        }
        .category-hero h1 span {
            background: linear-gradient(135deg, var(--primary), var(--accent));
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }
        .category-hero p {
            font-size: 1.2rem;
            color: var(--text-light);
            max-width: 680px;
            margin: 0 auto 28px;
            line-height: 1.8;
        }
        .hero-stats {
            display: flex;
            justify-content: center;
            gap: 48px;
            flex-wrap: wrap;
            margin-top: 8px;
        }
        .hero-stats .stat-item {
            text-align: center;
        }
        .hero-stats .stat-number {
            font-size: 2rem;
            font-weight: 800;
            color: var(--primary);
            line-height: 1.2;
        }
        .hero-stats .stat-label {
            font-size: 0.9rem;
            color: var(--text-light);
            margin-top: 2px;
        }

        /* ===== 板块通用 ===== */
        .section {
            padding: 80px 0;
        }
        .section-alt {
            background: var(--bg-alt);
        }
        .section-title {
            font-size: 2rem;
            font-weight: 800;
            color: var(--text);
            text-align: center;
            margin-bottom: 12px;
            letter-spacing: -0.01em;
        }
        .section-subtitle {
            font-size: 1.05rem;
            color: var(--text-light);
            text-align: center;
            max-width: 600px;
            margin: 0 auto 48px;
            line-height: 1.7;
        }
        .section-title-left {
            text-align: left;
        }
        .section-subtitle-left {
            text-align: left;
            margin-left: 0;
        }

        /* ===== 特色卡片 ===== */
        .features-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 28px;
        }
        .feature-card {
            background: var(--bg);
            border-radius: var(--radius);
            padding: 36px 28px 32px;
            box-shadow: var(--shadow);
            border: 1px solid var(--border);
            transition: all var(--transition);
            text-align: center;
        }
        .feature-card:hover {
            transform: translateY(-6px);
            box-shadow: var(--shadow-md);
            border-color: var(--primary-light);
        }
        .feature-card .icon-circle {
            width: 64px;
            height: 64px;
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            margin: 0 auto 18px;
            font-size: 1.6rem;
            color: #fff;
            background: var(--primary);
        }
        .feature-card:nth-child(2) .icon-circle {
            background: var(--secondary);
        }
        .feature-card:nth-child(3) .icon-circle {
            background: var(--accent);
        }
        .feature-card h3 {
            font-size: 1.2rem;
            font-weight: 700;
            margin-bottom: 10px;
        }
        .feature-card p {
            font-size: 0.95rem;
            color: var(--text-light);
            line-height: 1.7;
        }

        /* ===== 文章卡片列表 ===== */
        .article-grid {
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: 28px;
        }
        .article-card {
            background: var(--bg);
            border-radius: var(--radius);
            overflow: hidden;
            box-shadow: var(--shadow);
            border: 1px solid var(--border);
            transition: all var(--transition);
            display: flex;
            flex-direction: column;
        }
        .article-card:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow-md);
            border-color: var(--primary-light);
        }
        .article-card .card-top {
            padding: 24px 24px 0;
            display: flex;
            align-items: flex-start;
            gap: 16px;
        }
        .article-card .card-icon {
            flex-shrink: 0;
            width: 48px;
            height: 48px;
            border-radius: var(--radius-sm);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.3rem;
            color: var(--primary);
            background: var(--primary-light);
        }
        .article-card:nth-child(2) .card-icon {
            color: var(--secondary);
            background: var(--secondary-light);
        }
        .article-card:nth-child(3) .card-icon {
            color: var(--accent);
            background: #d1fae5;
        }
        .article-card:nth-child(4) .card-icon {
            color: #8b5cf6;
            background: #ede9fe;
        }
        .article-card .card-body {
            padding: 16px 24px 20px;
            flex: 1;
        }
        .article-card .card-body h3 {
            font-size: 1.1rem;
            font-weight: 700;
            margin-bottom: 8px;
            line-height: 1.4;
        }
        .article-card .card-body p {
            font-size: 0.92rem;
            color: var(--text-light);
            line-height: 1.7;
            margin-bottom: 12px;
        }
        .article-card .card-meta {
            display: flex;
            align-items: center;
            gap: 16px;
            font-size: 0.82rem;
            color: var(--text-light);
        }
        .article-card .card-meta .badge-tag {
            display: inline-block;
            padding: 2px 12px;
            border-radius: 50px;
            font-size: 0.75rem;
            font-weight: 600;
            background: var(--primary-light);
            color: var(--primary);
        }
        .article-card:nth-child(2) .badge-tag {
            background: var(--secondary-light);
            color: #b45309;
        }
        .article-card:nth-child(3) .badge-tag {
            background: #d1fae5;
            color: #047857;
        }
        .article-card:nth-child(4) .badge-tag {
            background: #ede9fe;
            color: #6d28d9;
        }
        .article-card .card-footer-link {
            padding: 12px 24px 16px;
            border-top: 1px solid var(--border);
        }
        .article-card .card-footer-link a {
            font-size: 0.9rem;
            font-weight: 600;
            color: var(--primary);
            display: inline-flex;
            align-items: center;
            gap: 6px;
            transition: gap var(--transition);
        }
        .article-card .card-footer-link a:hover {
            gap: 10px;
            color: var(--primary-dark);
        }

        /* ===== 流程步骤 ===== */
        .steps-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 24px;
            counter-reset: step;
        }
        .step-item {
            text-align: center;
            position: relative;
            padding: 32px 20px 28px;
            background: var(--bg);
            border-radius: var(--radius);
            box-shadow: var(--shadow);
            border: 1px solid var(--border);
            transition: all var(--transition);
        }
        .step-item:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow-md);
        }
        .step-item::before {
            counter-increment: step;
            content: counter(step);
            position: absolute;
            top: -14px;
            left: 50%;
            transform: translateX(-50%);
            width: 32px;
            height: 32px;
            border-radius: 50%;
            background: var(--primary);
            color: #fff;
            font-size: 0.9rem;
            font-weight: 700;
            display: flex;
            align-items: center;
            justify-content: center;
            box-shadow: 0 4px 12px rgba(37, 99, 235, 0.3);
        }
        .step-item:nth-child(2)::before {
            background: var(--secondary);
            box-shadow: 0 4px 12px rgba(245, 158, 11, 0.3);
        }
        .step-item:nth-child(3)::before {
            background: var(--accent);
            box-shadow: 0 4px 12px rgba(16, 185, 129, 0.3);
        }
        .step-item:nth-child(4)::before {
            background: #8b5cf6;
            box-shadow: 0 4px 12px rgba(139, 92, 246, 0.3);
        }
        .step-item .step-icon {
            font-size: 2rem;
            color: var(--primary);
            margin-bottom: 12px;
            margin-top: 8px;
        }
        .step-item:nth-child(2) .step-icon {
            color: var(--secondary);
        }
        .step-item:nth-child(3) .step-icon {
            color: var(--accent);
        }
        .step-item:nth-child(4) .step-icon {
            color: #8b5cf6;
        }
        .step-item h4 {
            font-size: 1.05rem;
            font-weight: 700;
            margin-bottom: 8px;
        }
        .step-item p {
            font-size: 0.9rem;
            color: var(--text-light);
            line-height: 1.7;
        }

        /* ===== FAQ ===== */
        .faq-list {
            max-width: 800px;
            margin: 0 auto;
            display: flex;
            flex-direction: column;
            gap: 12px;
        }
        .faq-item {
            background: var(--bg);
            border-radius: var(--radius-sm);
            border: 1px solid var(--border);
            overflow: hidden;
            transition: all var(--transition);
        }
        .faq-item:hover {
            border-color: var(--primary-light);
        }
        .faq-question {
            display: flex;
            justify-content: space-between;
            align-items: center;
            width: 100%;
            padding: 18px 24px;
            background: none;
            border: none;
            font-size: 1rem;
            font-weight: 600;
            color: var(--text);
            cursor: pointer;
            text-align: left;
            transition: background var(--transition);
            gap: 16px;
        }
        .faq-question:hover {
            background: var(--bg-alt);
        }
        .faq-question i {
            font-size: 1.1rem;
            color: var(--primary);
            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 0.4s ease, padding 0.4s ease;
            padding: 0 24px;
        }
        .faq-item.open .faq-answer {
            max-height: 300px;
            padding: 0 24px 20px;
        }
        .faq-answer p {
            font-size: 0.95rem;
            color: var(--text-light);
            line-height: 1.8;
            margin: 0;
        }

        /* ===== CTA ===== */
        .cta-section {
            padding: 80px 0;
            background: linear-gradient(135deg, var(--primary) 0%, #1e40af 100%);
            position: relative;
            overflow: hidden;
        }
        .cta-section::before {
            content: '';
            position: absolute;
            top: -50%;
            right: -20%;
            width: 600px;
            height: 600px;
            border-radius: 50%;
            background: radial-gradient(circle, rgba(255, 255, 255, 0.08), transparent 70%);
            pointer-events: none;
        }
        .cta-section .container {
            position: relative;
            z-index: 1;
            text-align: center;
        }
        .cta-section h2 {
            font-size: 2rem;
            font-weight: 800;
            color: #fff;
            margin-bottom: 12px;
        }
        .cta-section p {
            font-size: 1.1rem;
            color: rgba(255, 255, 255, 0.85);
            max-width: 600px;
            margin: 0 auto 32px;
            line-height: 1.7;
        }
        .cta-buttons {
            display: flex;
            justify-content: center;
            gap: 16px;
            flex-wrap: wrap;
        }
        .btn-cta-primary {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 14px 36px;
            border-radius: 50px;
            font-size: 1rem;
            font-weight: 700;
            color: var(--primary);
            background: #fff;
            border: none;
            cursor: pointer;
            transition: all var(--transition);
            box-shadow: 0 4px 16px rgba(0, 0, 0, 0.15);
        }
        .btn-cta-primary:hover {
            transform: translateY(-2px);
            box-shadow: 0 8px 28px rgba(0, 0, 0, 0.2);
            color: var(--primary-dark);
        }
        .btn-cta-secondary {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 14px 36px;
            border-radius: 50px;
            font-size: 1rem;
            font-weight: 600;
            color: #fff;
            background: transparent;
            border: 2px solid rgba(255, 255, 255, 0.6);
            cursor: pointer;
            transition: all var(--transition);
        }
        .btn-cta-secondary:hover {
            border-color: #fff;
            background: rgba(255, 255, 255, 0.1);
            transform: translateY(-2px);
        }

        /* ===== 页脚 ===== */
        .footer {
            background: var(--bg-dark);
            color: rgba(255, 255, 255, 0.8);
            padding: 60px 0 0;
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr 1.5fr;
            gap: 40px;
            padding-bottom: 40px;
            border-bottom: 1px solid rgba(255, 255, 255, 0.08);
        }
        .footer-brand .logo {
            color: #fff;
            margin-bottom: 16px;
        }
        .footer-brand .logo i {
            color: var(--secondary);
        }
        .footer-brand p {
            font-size: 0.92rem;
            line-height: 1.8;
            color: rgba(255, 255, 255, 0.6);
            max-width: 320px;
        }
        .footer-col h4 {
            font-size: 1rem;
            font-weight: 700;
            color: #fff;
            margin-bottom: 16px;
        }
        .footer-col a {
            display: block;
            padding: 6px 0;
            font-size: 0.92rem;
            color: rgba(255, 255, 255, 0.6);
            transition: all var(--transition);
        }
        .footer-col a:hover {
            color: #fff;
            padding-left: 4px;
        }
        .footer-bottom {
            display: flex;
            justify-content: space-between;
            align-items: center;
            padding: 24px 0;
            font-size: 0.85rem;
            color: rgba(255, 255, 255, 0.4);
            flex-wrap: wrap;
            gap: 12px;
        }
        .footer-bottom a {
            color: rgba(255, 255, 255, 0.6);
        }
        .footer-bottom a:hover {
            color: #fff;
        }

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

        @media (max-width: 768px) {
            .nav-list {
                display: none;
            }
            .hamburger {
                display: flex;
            }
            .mobile-nav {
                display: block;
            }

            .category-hero {
                padding: 100px 0 56px;
            }
            .category-hero h1 {
                font-size: 2rem;
            }
            .category-hero p {
                font-size: 1.05rem;
            }
            .hero-stats {
                gap: 28px;
            }
            .hero-stats .stat-number {
                font-size: 1.6rem;
            }

            .section {
                padding: 56px 0;
            }
            .section-title {
                font-size: 1.6rem;
            }
            .section-subtitle {
                font-size: 0.95rem;
                margin-bottom: 32px;
            }

            .features-grid {
                grid-template-columns: 1fr;
                gap: 20px;
            }
            .article-grid {
                grid-template-columns: 1fr;
                gap: 20px;
            }
            .steps-grid {
                grid-template-columns: 1fr;
                gap: 20px;
            }

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

            .cta-section h2 {
                font-size: 1.6rem;
            }
            .cta-section p {
                font-size: 1rem;
            }
            .btn-cta-primary,
            .btn-cta-secondary {
                padding: 12px 28px;
                font-size: 0.95rem;
                width: 100%;
                justify-content: center;
            }
            .cta-buttons {
                flex-direction: column;
                align-items: stretch;
                max-width: 320px;
                margin: 0 auto;
            }

            .faq-question {
                padding: 14px 18px;
                font-size: 0.95rem;
            }
            .faq-answer {
                padding: 0 18px;
            }
            .faq-item.open .faq-answer {
                padding: 0 18px 16px;
            }
        }

        @media (max-width: 520px) {
            .container {
                padding: 0 16px;
            }
            .category-hero h1 {
                font-size: 1.7rem;
            }
            .category-hero p {
                font-size: 0.95rem;
            }
            .section-title {
                font-size: 1.35rem;
            }
            .feature-card {
                padding: 28px 20px 24px;
            }
            .article-card .card-top {
                padding: 18px 18px 0;
                flex-direction: column;
                gap: 12px;
            }
            .article-card .card-body {
                padding: 12px 18px 16px;
            }
            .article-card .card-footer-link {
                padding: 10px 18px 14px;
            }
            .step-item {
                padding: 28px 16px 24px;
            }
            .hero-stats .stat-item {
                flex: 1;
                min-width: 80px;
            }
        }

        /* ===== 工具类 ===== */
        .text-center {
            text-align: center;
        }
        .mt-16 {
            margin-top: 16px;
        }
        .mt-24 {
            margin-top: 24px;
        }
        .mt-32 {
            margin-top: 32px;
        }
        .gap-8 {
            gap: 8px;
        }
        .flex-center {
            display: flex;
            align-items: center;
            justify-content: center;
        }

        /* ===== 滚动条美化 ===== */
        ::-webkit-scrollbar {
            width: 8px;
            height: 8px;
        }
        ::-webkit-scrollbar-track {
            background: var(--bg-alt);
        }
        ::-webkit-scrollbar-thumb {
            background: var(--border);
            border-radius: 4px;
        }
        ::-webkit-scrollbar-thumb:hover {
            background: var(--text-light);
        }

        /* ===== 选中颜色 ===== */
        ::selection {
            background: var(--primary);
            color: #fff;
        }

/* roulang page: category2 */
/* ===== 设计变量 ===== */
        :root {
            --primary: #4F46E5;
            --primary-light: #6366F1;
            --primary-dark: #3730A3;
            --secondary: #F59E0B;
            --secondary-light: #FBBF24;
            --bg: #F8FAFC;
            --bg-card: #FFFFFF;
            --bg-dark: #1E293B;
            --bg-soft: #EFF6FF;
            --text: #1E293B;
            --text-light: #64748B;
            --text-white: #F8FAFC;
            --border: #E2E8F0;
            --radius: 16px;
            --radius-sm: 8px;
            --radius-lg: 24px;
            --shadow: 0 4px 24px rgba(79, 70, 229, 0.08);
            --shadow-hover: 0 12px 40px rgba(79, 70, 229, 0.14);
            --transition: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
            --font: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Helvetica, Arial, sans-serif;
            --max-width: 1200px;
            --header-height: 72px;
        }

        /* ===== 基础 Reset ===== */
        *,
        *::before,
        *::after {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
        }
        html {
            scroll-behavior: smooth;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
        }
        body {
            font-family: var(--font);
            font-size: 16px;
            line-height: 1.6;
            color: var(--text);
            background: var(--bg);
            padding-top: var(--header-height);
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
        }
        a {
            color: var(--primary);
            text-decoration: none;
            transition: color var(--transition);
        }
        a:hover {
            color: var(--primary-dark);
        }
        a:focus-visible {
            outline: 2px solid var(--primary);
            outline-offset: 2px;
            border-radius: 4px;
        }
        button,
        .btn {
            cursor: pointer;
            font-family: var(--font);
            border: none;
            transition: all var(--transition);
        }
        button:focus-visible,
        .btn:focus-visible {
            outline: 2px solid var(--primary);
            outline-offset: 2px;
        }
        ul,
        ol {
            list-style: none;
        }

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

        /* ===== 通用板块间距 ===== */
        .section {
            padding: 80px 0;
        }
        .section-title {
            font-size: 2rem;
            font-weight: 700;
            color: var(--text);
            margin-bottom: 12px;
            letter-spacing: -0.01em;
            line-height: 1.3;
        }
        .section-subtitle {
            font-size: 1.05rem;
            color: var(--text-light);
            max-width: 640px;
            margin-bottom: 48px;
            line-height: 1.7;
        }
        .section-title-center {
            text-align: center;
        }
        .section-subtitle-center {
            text-align: center;
            margin-left: auto;
            margin-right: auto;
        }
        @media (max-width: 768px) {
            .section {
                padding: 48px 0;
            }
            .section-title {
                font-size: 1.5rem;
            }
            .section-subtitle {
                font-size: 0.95rem;
                margin-bottom: 32px;
            }
        }

        /* ===== 导航 ===== */
        .header {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            z-index: 1000;
            height: var(--header-height);
            background: rgba(255, 255, 255, 0.92);
            backdrop-filter: blur(20px);
            -webkit-backdrop-filter: blur(20px);
            border-bottom: 1px solid rgba(226, 232, 240, 0.6);
            transition: box-shadow var(--transition);
        }
        .header.scrolled {
            box-shadow: 0 4px 30px rgba(0, 0, 0, 0.06);
        }
        .header .container {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 100%;
        }
        .logo {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 1.3rem;
            font-weight: 700;
            color: var(--text);
            letter-spacing: -0.02em;
        }
        .logo i {
            color: var(--primary);
            font-size: 1.5rem;
        }
        .logo span {
            background: linear-gradient(135deg, var(--primary), var(--primary-light));
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }
        .nav-list {
            display: flex;
            align-items: center;
            gap: 8px;
        }
        .nav-list a {
            padding: 8px 20px;
            border-radius: var(--radius-sm);
            font-size: 0.95rem;
            font-weight: 500;
            color: var(--text-light);
            transition: all var(--transition);
            position: relative;
        }
        .nav-list a:hover {
            color: var(--primary);
            background: var(--bg-soft);
        }
        .nav-list a.active {
            color: var(--primary);
            background: var(--bg-soft);
            font-weight: 600;
        }
        .nav-list a.active::after {
            content: '';
            position: absolute;
            bottom: 4px;
            left: 50%;
            transform: translateX(-50%);
            width: 20px;
            height: 3px;
            border-radius: 2px;
            background: var(--primary);
        }
        .nav-toggle {
            display: none;
            background: none;
            border: none;
            font-size: 1.5rem;
            color: var(--text);
            padding: 8px;
            border-radius: var(--radius-sm);
            cursor: pointer;
        }
        .nav-toggle:focus-visible {
            outline: 2px solid var(--primary);
            outline-offset: 2px;
        }
        @media (max-width: 768px) {
            .nav-toggle {
                display: block;
            }
            .nav-list {
                position: fixed;
                top: var(--header-height);
                left: 0;
                right: 0;
                background: rgba(255, 255, 255, 0.98);
                backdrop-filter: blur(20px);
                flex-direction: column;
                padding: 16px 24px 24px;
                gap: 4px;
                border-bottom: 1px solid var(--border);
                transform: translateY(-120%);
                opacity: 0;
                pointer-events: none;
                transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
                box-shadow: 0 20px 40px rgba(0, 0, 0, 0.06);
            }
            .nav-list.open {
                transform: translateY(0);
                opacity: 1;
                pointer-events: auto;
            }
            .nav-list a {
                width: 100%;
                padding: 12px 16px;
                font-size: 1.05rem;
            }
            .nav-list a.active::after {
                display: none;
            }
            .nav-list a.active {
                background: var(--bg-soft);
                border-left: 3px solid var(--primary);
            }
        }

        /* ===== Hero 分类页头 ===== */
        .category-hero {
            padding: 64px 0 56px;
            background: linear-gradient(135deg, var(--bg-soft) 0%, #F0F4FF 50%, #FDF2F8 100%);
            position: relative;
            overflow: hidden;
        }
        .category-hero::before {
            content: '';
            position: absolute;
            top: -120px;
            right: -120px;
            width: 400px;
            height: 400px;
            border-radius: 50%;
            background: radial-gradient(circle, rgba(79, 70, 229, 0.06), transparent 70%);
            pointer-events: none;
        }
        .category-hero::after {
            content: '';
            position: absolute;
            bottom: -80px;
            left: -80px;
            width: 300px;
            height: 300px;
            border-radius: 50%;
            background: radial-gradient(circle, rgba(245, 158, 11, 0.05), transparent 70%);
            pointer-events: none;
        }
        .category-hero .container {
            position: relative;
            z-index: 1;
            display: flex;
            flex-direction: column;
            align-items: center;
            text-align: center;
        }
        .category-hero .badge {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            padding: 6px 16px;
            border-radius: 100px;
            font-size: 0.85rem;
            font-weight: 500;
            background: rgba(79, 70, 229, 0.1);
            color: var(--primary);
            margin-bottom: 20px;
        }
        .category-hero .badge i {
            font-size: 0.75rem;
        }
        .category-hero h1 {
            font-size: 2.6rem;
            font-weight: 800;
            color: var(--text);
            letter-spacing: -0.02em;
            line-height: 1.2;
            margin-bottom: 16px;
            max-width: 700px;
        }
        .category-hero h1 span {
            background: linear-gradient(135deg, var(--primary), var(--secondary));
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }
        .category-hero p {
            font-size: 1.1rem;
            color: var(--text-light);
            max-width: 600px;
            line-height: 1.7;
            margin-bottom: 28px;
        }
        .category-hero .hero-stats {
            display: flex;
            gap: 32px;
            flex-wrap: wrap;
            justify-content: center;
        }
        .category-hero .hero-stats .stat-item {
            text-align: center;
        }
        .category-hero .hero-stats .stat-number {
            font-size: 1.8rem;
            font-weight: 700;
            color: var(--primary);
            line-height: 1.2;
        }
        .category-hero .hero-stats .stat-label {
            font-size: 0.85rem;
            color: var(--text-light);
        }
        @media (max-width: 768px) {
            .category-hero {
                padding: 40px 0 36px;
            }
            .category-hero h1 {
                font-size: 1.8rem;
            }
            .category-hero p {
                font-size: 0.95rem;
            }
            .category-hero .hero-stats {
                gap: 20px;
            }
            .category-hero .hero-stats .stat-number {
                font-size: 1.4rem;
            }
        }
        @media (max-width: 520px) {
            .category-hero h1 {
                font-size: 1.5rem;
            }
            .category-hero .hero-stats {
                flex-direction: column;
                gap: 12px;
            }
        }

        /* ===== 卡片通用 ===== */
        .card {
            background: var(--bg-card);
            border-radius: var(--radius);
            box-shadow: var(--shadow);
            padding: 32px;
            transition: all var(--transition);
            border: 1px solid var(--border);
        }
        .card:hover {
            box-shadow: var(--shadow-hover);
            transform: translateY(-2px);
        }
        .card .card-icon {
            width: 52px;
            height: 52px;
            border-radius: 12px;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.4rem;
            color: var(--primary);
            background: var(--bg-soft);
            margin-bottom: 16px;
        }
        .card h3 {
            font-size: 1.15rem;
            font-weight: 600;
            margin-bottom: 8px;
            color: var(--text);
        }
        .card p {
            font-size: 0.9rem;
            color: var(--text-light);
            line-height: 1.7;
        }
        @media (max-width: 768px) {
            .card {
                padding: 24px;
            }
        }

        /* ===== 评测维度网格 ===== */
        .dimension-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 24px;
        }
        .dimension-card {
            background: var(--bg-card);
            border-radius: var(--radius);
            padding: 28px 24px;
            text-align: center;
            border: 1px solid var(--border);
            transition: all var(--transition);
            box-shadow: var(--shadow);
        }
        .dimension-card:hover {
            box-shadow: var(--shadow-hover);
            transform: translateY(-3px);
        }
        .dimension-card .dim-icon {
            width: 56px;
            height: 56px;
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            margin: 0 auto 14px;
            font-size: 1.4rem;
            color: var(--primary);
            background: var(--bg-soft);
        }
        .dimension-card h4 {
            font-size: 1rem;
            font-weight: 600;
            margin-bottom: 6px;
            color: var(--text);
        }
        .dimension-card .dim-score {
            font-size: 0.85rem;
            color: var(--secondary);
            font-weight: 500;
        }
        .dimension-card .dim-score i {
            margin-right: 4px;
        }
        @media (max-width: 1024px) {
            .dimension-grid {
                grid-template-columns: repeat(2, 1fr);
            }
        }
        @media (max-width: 520px) {
            .dimension-grid {
                grid-template-columns: 1fr;
            }
        }

        /* ===== 精选评测卡片 ===== */
        .review-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 24px;
        }
        .review-card {
            background: var(--bg-card);
            border-radius: var(--radius);
            border: 1px solid var(--border);
            box-shadow: var(--shadow);
            overflow: hidden;
            transition: all var(--transition);
        }
        .review-card:hover {
            box-shadow: var(--shadow-hover);
            transform: translateY(-3px);
        }
        .review-card .review-header {
            padding: 24px 24px 0;
            display: flex;
            align-items: flex-start;
            gap: 14px;
        }
        .review-card .review-avatar {
            width: 44px;
            height: 44px;
            border-radius: 50%;
            background: var(--bg-soft);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.1rem;
            color: var(--primary);
            flex-shrink: 0;
        }
        .review-card .review-meta {
            flex: 1;
        }
        .review-card .review-meta h4 {
            font-size: 1rem;
            font-weight: 600;
            color: var(--text);
            margin-bottom: 2px;
        }
        .review-card .review-meta .review-date {
            font-size: 0.8rem;
            color: var(--text-light);
        }
        .review-card .review-stars {
            color: var(--secondary);
            font-size: 0.85rem;
            letter-spacing: 1px;
            margin-top: 2px;
        }
        .review-card .review-body {
            padding: 16px 24px 24px;
        }
        .review-card .review-body p {
            font-size: 0.9rem;
            color: var(--text-light);
            line-height: 1.7;
            display: -webkit-box;
            -webkit-line-clamp: 3;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }
        .review-card .review-tags {
            padding: 0 24px 20px;
            display: flex;
            gap: 8px;
            flex-wrap: wrap;
        }
        .review-card .review-tags .tag {
            padding: 4px 12px;
            border-radius: 100px;
            font-size: 0.75rem;
            font-weight: 500;
            background: var(--bg-soft);
            color: var(--primary);
        }
        .review-card .review-footer {
            padding: 14px 24px;
            border-top: 1px solid var(--border);
            display: flex;
            justify-content: space-between;
            align-items: center;
            font-size: 0.85rem;
            color: var(--text-light);
        }
        .review-card .review-footer a {
            font-weight: 500;
            color: var(--primary);
            font-size: 0.85rem;
        }
        .review-card .review-footer a:hover {
            color: var(--primary-dark);
        }
        @media (max-width: 1024px) {
            .review-grid {
                grid-template-columns: repeat(2, 1fr);
            }
        }
        @media (max-width: 640px) {
            .review-grid {
                grid-template-columns: 1fr;
            }
        }

        /* ===== 对比评测 ===== */
        .compare-section {
            background: var(--bg-dark);
            color: var(--text-white);
        }
        .compare-section .section-title {
            color: var(--text-white);
        }
        .compare-section .section-subtitle {
            color: rgba(248, 250, 252, 0.7);
        }
        .compare-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 24px;
        }
        .compare-card {
            background: rgba(255, 255, 255, 0.06);
            border-radius: var(--radius);
            padding: 32px 24px;
            border: 1px solid rgba(255, 255, 255, 0.08);
            transition: all var(--transition);
            backdrop-filter: blur(4px);
        }
        .compare-card:hover {
            background: rgba(255, 255, 255, 0.10);
            transform: translateY(-2px);
        }
        .compare-card .compare-icon {
            font-size: 2rem;
            color: var(--secondary);
            margin-bottom: 14px;
        }
        .compare-card h4 {
            font-size: 1.1rem;
            font-weight: 600;
            margin-bottom: 10px;
            color: var(--text-white);
        }
        .compare-card p {
            font-size: 0.9rem;
            color: rgba(248, 250, 252, 0.7);
            line-height: 1.7;
        }
        .compare-card .compare-badge {
            display: inline-block;
            margin-top: 12px;
            padding: 4px 14px;
            border-radius: 100px;
            font-size: 0.8rem;
            font-weight: 500;
            background: rgba(245, 158, 11, 0.15);
            color: var(--secondary-light);
        }
        @media (max-width: 1024px) {
            .compare-grid {
                grid-template-columns: repeat(2, 1fr);
            }
        }
        @media (max-width: 640px) {
            .compare-grid {
                grid-template-columns: 1fr;
            }
        }

        /* ===== 评分条 ===== */
        .rating-list {
            max-width: 600px;
            margin: 0 auto;
        }
        .rating-item {
            display: flex;
            align-items: center;
            gap: 16px;
            margin-bottom: 18px;
        }
        .rating-item .rating-label {
            width: 100px;
            font-size: 0.9rem;
            font-weight: 500;
            color: var(--text);
            flex-shrink: 0;
        }
        .rating-item .rating-bar {
            flex: 1;
            height: 10px;
            background: var(--border);
            border-radius: 10px;
            overflow: hidden;
            position: relative;
        }
        .rating-item .rating-bar .fill {
            height: 100%;
            border-radius: 10px;
            background: linear-gradient(90deg, var(--primary), var(--primary-light));
            transition: width 0.8s ease;
        }
        .rating-item .rating-score {
            width: 36px;
            font-size: 0.9rem;
            font-weight: 600;
            color: var(--text);
            text-align: right;
            flex-shrink: 0;
        }
        @media (max-width: 520px) {
            .rating-item {
                flex-wrap: wrap;
                gap: 8px;
            }
            .rating-item .rating-label {
                width: 100%;
                font-size: 0.85rem;
            }
            .rating-item .rating-score {
                width: auto;
            }
        }

        /* ===== 用户反馈摘录 ===== */
        .feedback-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 24px;
        }
        .feedback-card {
            background: var(--bg-card);
            border-radius: var(--radius);
            padding: 28px 24px;
            border: 1px solid var(--border);
            box-shadow: var(--shadow);
            transition: all var(--transition);
        }
        .feedback-card:hover {
            box-shadow: var(--shadow-hover);
            transform: translateY(-2px);
        }
        .feedback-card .feedback-quote {
            font-size: 0.9rem;
            color: var(--text-light);
            line-height: 1.8;
            font-style: italic;
            margin-bottom: 16px;
            position: relative;
            padding-left: 16px;
            border-left: 3px solid var(--primary-light);
        }
        .feedback-card .feedback-author {
            display: flex;
            align-items: center;
            gap: 12px;
        }
        .feedback-card .feedback-author .fa-circle-user {
            font-size: 2rem;
            color: var(--primary-light);
        }
        .feedback-card .feedback-author .author-name {
            font-size: 0.9rem;
            font-weight: 600;
            color: var(--text);
        }
        .feedback-card .feedback-author .author-role {
            font-size: 0.8rem;
            color: var(--text-light);
        }
        @media (max-width: 1024px) {
            .feedback-grid {
                grid-template-columns: repeat(2, 1fr);
            }
        }
        @media (max-width: 640px) {
            .feedback-grid {
                grid-template-columns: 1fr;
            }
        }

        /* ===== FAQ ===== */
        .faq-list {
            max-width: 760px;
            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);
            overflow: hidden;
            transition: all var(--transition);
        }
        .faq-item:hover {
            border-color: var(--primary-light);
        }
        .faq-item .faq-question {
            padding: 18px 24px;
            font-size: 0.95rem;
            font-weight: 500;
            color: var(--text);
            cursor: pointer;
            display: flex;
            justify-content: space-between;
            align-items: center;
            background: none;
            width: 100%;
            text-align: left;
            border: none;
            font-family: var(--font);
        }
        .faq-item .faq-question i {
            transition: transform var(--transition);
            color: var(--text-light);
            font-size: 0.85rem;
        }
        .faq-item.active .faq-question i {
            transform: rotate(180deg);
        }
        .faq-item .faq-answer {
            padding: 0 24px 18px;
            font-size: 0.9rem;
            color: var(--text-light);
            line-height: 1.7;
            display: none;
        }
        .faq-item.active .faq-answer {
            display: block;
        }
        @media (max-width: 768px) {
            .faq-item .faq-question {
                padding: 14px 16px;
                font-size: 0.9rem;
            }
            .faq-item .faq-answer {
                padding: 0 16px 14px;
                font-size: 0.85rem;
            }
        }

        /* ===== CTA ===== */
        .cta-section {
            background: linear-gradient(135deg, var(--primary-dark), var(--primary));
            padding: 64px 0;
            text-align: center;
            color: var(--text-white);
        }
        .cta-section h2 {
            font-size: 2rem;
            font-weight: 700;
            margin-bottom: 12px;
            letter-spacing: -0.01em;
        }
        .cta-section p {
            font-size: 1.05rem;
            color: rgba(248, 250, 252, 0.8);
            max-width: 560px;
            margin: 0 auto 28px;
            line-height: 1.7;
        }
        .cta-section .btn-cta {
            display: inline-flex;
            align-items: center;
            gap: 10px;
            padding: 14px 36px;
            border-radius: 100px;
            font-size: 1rem;
            font-weight: 600;
            background: var(--text-white);
            color: var(--primary-dark);
            border: none;
            transition: all var(--transition);
        }
        .cta-section .btn-cta:hover {
            background: var(--secondary-light);
            color: var(--text);
            transform: translateY(-2px);
            box-shadow: 0 8px 30px rgba(0, 0, 0, 0.15);
        }
        .cta-section .btn-cta i {
            font-size: 0.9rem;
        }
        @media (max-width: 768px) {
            .cta-section {
                padding: 48px 0;
            }
            .cta-section h2 {
                font-size: 1.5rem;
            }
            .cta-section p {
                font-size: 0.95rem;
            }
            .cta-section .btn-cta {
                padding: 12px 28px;
                font-size: 0.95rem;
            }
        }

        /* ===== 按钮通用 ===== */
        .btn-outline-primary {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 10px 24px;
            border-radius: 100px;
            font-size: 0.9rem;
            font-weight: 500;
            color: var(--primary);
            border: 1.5px solid var(--primary);
            background: transparent;
            transition: all var(--transition);
        }
        .btn-outline-primary:hover {
            background: var(--primary);
            color: #fff;
            transform: translateY(-1px);
            box-shadow: 0 4px 16px rgba(79, 70, 229, 0.2);
        }

        /* ===== 页脚 ===== */
        .footer {
            background: var(--bg-dark);
            color: rgba(248, 250, 252, 0.8);
            padding: 56px 0 32px;
            font-size: 0.9rem;
        }
        .footer .footer-grid {
            display: grid;
            grid-template-columns: 1.6fr 1fr 1fr 1.2fr;
            gap: 40px;
            margin-bottom: 36px;
        }
        .footer .footer-brand .logo {
            color: var(--text-white);
            margin-bottom: 12px;
        }
        .footer .footer-brand .logo span {
            background: linear-gradient(135deg, #A5B4FC, #C7D2FE);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }
        .footer .footer-brand p {
            font-size: 0.88rem;
            color: rgba(248, 250, 252, 0.6);
            line-height: 1.7;
            max-width: 280px;
        }
        .footer .footer-col h4 {
            font-size: 0.95rem;
            font-weight: 600;
            color: var(--text-white);
            margin-bottom: 16px;
        }
        .footer .footer-col a {
            display: block;
            font-size: 0.88rem;
            color: rgba(248, 250, 252, 0.6);
            padding: 4px 0;
            transition: color var(--transition);
        }
        .footer .footer-col a:hover {
            color: var(--text-white);
        }
        .footer .footer-bottom {
            border-top: 1px solid rgba(248, 250, 252, 0.08);
            padding-top: 24px;
            display: flex;
            justify-content: space-between;
            align-items: center;
            flex-wrap: wrap;
            gap: 12px;
            font-size: 0.82rem;
            color: rgba(248, 250, 252, 0.5);
        }
        .footer .footer-bottom a {
            color: rgba(248, 250, 252, 0.6);
        }
        .footer .footer-bottom a:hover {
            color: var(--text-white);
        }
        @media (max-width: 1024px) {
            .footer .footer-grid {
                grid-template-columns: 1fr 1fr;
                gap: 32px;
            }
            .footer .footer-brand {
                grid-column: 1 / -1;
            }
            .footer .footer-brand p {
                max-width: 100%;
            }
        }
        @media (max-width: 640px) {
            .footer .footer-grid {
                grid-template-columns: 1fr;
                gap: 24px;
            }
            .footer .footer-bottom {
                flex-direction: column;
                text-align: center;
            }
            .footer {
                padding: 40px 0 24px;
            }
        }

        /* ===== 分隔线 ===== */
        .divider {
            width: 60px;
            height: 4px;
            border-radius: 4px;
            background: linear-gradient(90deg, var(--primary), var(--primary-light));
            margin: 0 auto 16px;
        }
        .divider-left {
            margin: 0 0 16px;
        }

        /* ===== 移动端导航覆盖 ===== */
        @media (max-width: 768px) {
            body {
                padding-top: 60px;
            }
            :root {
                --header-height: 60px;
            }
            .logo {
                font-size: 1.1rem;
            }
            .logo i {
                font-size: 1.2rem;
            }
        }

        /* ===== 滚动动画 ===== */
        .fade-up {
            opacity: 0;
            transform: translateY(20px);
            transition: opacity 0.6s ease, transform 0.6s ease;
        }
        .fade-up.visible {
            opacity: 1;
            transform: translateY(0);
        }