/* roulang page: index */
/* ===== 设计变量 ===== */
        :root {
            --primary: #0f1b3d;
            --primary-light: #1a2d5e;
            --primary-dark: #080e22;
            --accent: #c9a84c;
            --accent-light: #e0c56a;
            --accent-dark: #a88830;
            --bg: #ffffff;
            --bg-alt: #f5f7fb;
            --bg-dark: #0a1128;
            --text: #1a1a2e;
            --text-light: #5a6070;
            --text-lighter: #8a90a0;
            --border: #e4e8ee;
            --border-light: #f0f2f6;
            --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.06);
            --shadow-md: 0 4px 16px rgba(0, 0, 0, 0.08);
            --shadow-lg: 0 8px 32px rgba(0, 0, 0, 0.12);
            --radius-sm: 6px;
            --radius-md: 12px;
            --radius-lg: 20px;
            --radius-xl: 28px;
            --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', sans-serif;
            --transition: 0.25s cubic-bezier(0.4, 0, 0.2, 1);
            --max-width: 1200px;
            --header-h: 80px;
            --topbar-h: 36px;
        }

        /* ===== Reset & Base ===== */
        *,
        *::before,
        *::after {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
        }
        html {
            scroll-behavior: smooth;
            -webkit-font-smoothing: antialiased;
        }
        body {
            font-family: var(--font-sans);
            font-size: 16px;
            line-height: 1.7;
            color: var(--text);
            background: var(--bg);
        }
        a {
            color: var(--primary);
            text-decoration: none;
            transition: color var(--transition);
        }
        a:hover {
            color: var(--accent-dark);
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
        }
        button,
        input,
        textarea {
            font-family: inherit;
            font-size: inherit;
            outline: none;
            border: none;
        }
        button {
            cursor: pointer;
            background: none;
        }
        ul,
        ol {
            list-style: none;
        }
        h1,
        h2,
        h3,
        h4,
        h5,
        h6 {
            line-height: 1.3;
            font-weight: 700;
            color: var(--primary);
        }
        h1 {
            font-size: clamp(2rem, 5vw, 3.6rem);
        }
        h2 {
            font-size: clamp(1.5rem, 3.5vw, 2.4rem);
            margin-bottom: 1.2rem;
        }
        h3 {
            font-size: clamp(1.15rem, 2vw, 1.5rem);
        }
        p {
            margin-bottom: 1rem;
            color: var(--text-light);
        }
        .container {
            width: 100%;
            max-width: var(--max-width);
            margin: 0 auto;
            padding: 0 24px;
        }

        /* ===== Top Bar ===== */
        .topbar {
            background: var(--primary-dark);
            color: rgba(255, 255, 255, 0.8);
            font-size: 0.8rem;
            height: var(--topbar-h);
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding: 0 24px;
            max-width: 100%;
        }
        .topbar .container {
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding: 0;
        }
        .topbar-left {
            display: flex;
            align-items: center;
            gap: 20px;
        }
        .topbar-left span {
            display: flex;
            align-items: center;
            gap: 6px;
        }
        .topbar-left i {
            color: var(--accent);
            font-size: 0.75rem;
        }
        .topbar-right {
            display: flex;
            align-items: center;
            gap: 16px;
        }
        .topbar-right a {
            color: rgba(255, 255, 255, 0.8);
            font-size: 0.8rem;
            transition: color var(--transition);
        }
        .topbar-right a:hover {
            color: var(--accent-light);
        }
        .topbar-domain {
            font-weight: 600;
            color: var(--accent-light) !important;
            letter-spacing: 0.3px;
        }

        /* ===== Header / Nav ===== */
        .header {
            position: sticky;
            top: 0;
            z-index: 1000;
            background: rgba(255, 255, 255, 0.97);
            backdrop-filter: blur(12px);
            border-bottom: 1px solid var(--border-light);
            height: var(--header-h);
            display: flex;
            align-items: center;
            transition: box-shadow var(--transition);
        }
        .header.scrolled {
            box-shadow: var(--shadow-md);
        }
        .header .container {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 100%;
        }
        .logo {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 1.5rem;
            font-weight: 800;
            color: var(--primary);
            letter-spacing: -0.5px;
        }
        .logo i {
            color: var(--accent);
            font-size: 1.8rem;
        }
        .logo span {
            background: linear-gradient(135deg, var(--primary), var(--accent-dark));
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }
        .nav {
            display: flex;
            align-items: center;
            gap: 8px;
        }
        .nav a {
            padding: 8px 18px;
            border-radius: var(--radius-sm);
            font-weight: 500;
            font-size: 0.95rem;
            color: var(--text-light);
            transition: all var(--transition);
            position: relative;
        }
        .nav a:hover {
            color: var(--primary);
            background: var(--bg-alt);
        }
        .nav a.active {
            color: var(--primary);
            background: rgba(15, 27, 61, 0.06);
            font-weight: 600;
        }
        .nav a.active::after {
            content: '';
            position: absolute;
            bottom: 2px;
            left: 50%;
            transform: translateX(-50%);
            width: 20px;
            height: 3px;
            background: var(--accent);
            border-radius: 4px;
        }
        .nav-cta {
            background: var(--primary) !important;
            color: #fff !important;
            padding: 8px 22px !important;
            border-radius: var(--radius-sm) !important;
            font-weight: 600 !important;
            margin-left: 12px;
        }
        .nav-cta:hover {
            background: var(--primary-light) !important;
            transform: translateY(-1px);
            box-shadow: var(--shadow-sm);
        }

        /* Mobile nav toggle */
        .nav-toggle {
            display: none;
            font-size: 1.5rem;
            color: var(--primary);
            padding: 6px 10px;
            border-radius: var(--radius-sm);
            transition: background var(--transition);
        }
        .nav-toggle:hover {
            background: var(--bg-alt);
        }
        .mobile-nav {
            display: none;
            position: fixed;
            top: calc(var(--topbar-h) + var(--header-h));
            left: 0;
            right: 0;
            background: rgba(255, 255, 255, 0.99);
            backdrop-filter: blur(12px);
            padding: 20px 24px;
            border-bottom: 1px solid var(--border);
            box-shadow: var(--shadow-lg);
            z-index: 999;
            flex-direction: column;
            gap: 4px;
        }
        .mobile-nav.open {
            display: flex;
        }
        .mobile-nav a {
            padding: 12px 16px;
            border-radius: var(--radius-sm);
            font-weight: 500;
            color: var(--text-light);
            transition: all var(--transition);
        }
        .mobile-nav a:hover,
        .mobile-nav a.active {
            color: var(--primary);
            background: var(--bg-alt);
        }
        .mobile-nav a.nav-cta {
            text-align: center;
            margin-top: 8px;
        }

        /* ===== Hero ===== */
        .hero {
            padding: 80px 0 100px;
            background: linear-gradient(165deg, var(--bg) 0%, var(--bg-alt) 60%, rgba(201, 168, 76, 0.08) 100%);
            position: relative;
            overflow: hidden;
        }
        .hero::before {
            content: '';
            position: absolute;
            top: -30%;
            right: -10%;
            width: 500px;
            height: 500px;
            background: radial-gradient(circle, rgba(201, 168, 76, 0.12) 0%, transparent 70%);
            border-radius: 50%;
            pointer-events: none;
        }
        .hero::after {
            content: '';
            position: absolute;
            bottom: -20%;
            left: -10%;
            width: 400px;
            height: 400px;
            background: radial-gradient(circle, rgba(15, 27, 61, 0.06) 0%, transparent 70%);
            border-radius: 50%;
            pointer-events: none;
        }
        .hero .container {
            position: relative;
            z-index: 1;
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 60px;
            align-items: center;
        }
        .hero-content h1 {
            margin-bottom: 20px;
            line-height: 1.15;
        }
        .hero-content h1 .highlight {
            color: var(--accent-dark);
            background: linear-gradient(135deg, var(--accent-dark), var(--accent));
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }
        .hero-content p {
            font-size: 1.15rem;
            color: var(--text-light);
            max-width: 520px;
            margin-bottom: 32px;
            line-height: 1.8;
        }
        .hero-buttons {
            display: flex;
            gap: 16px;
            flex-wrap: wrap;
        }
        .btn {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 14px 32px;
            border-radius: var(--radius-sm);
            font-weight: 600;
            font-size: 1rem;
            transition: all var(--transition);
            border: 2px solid transparent;
        }
        .btn-primary {
            background: var(--primary);
            color: #fff;
            border-color: var(--primary);
        }
        .btn-primary:hover {
            background: var(--primary-light);
            border-color: var(--primary-light);
            transform: translateY(-2px);
            box-shadow: var(--shadow-md);
            color: #fff;
        }
        .btn-secondary {
            background: transparent;
            color: var(--primary);
            border-color: var(--primary);
        }
        .btn-secondary:hover {
            background: var(--primary);
            color: #fff;
            transform: translateY(-2px);
            box-shadow: var(--shadow-md);
        }
        .btn-accent {
            background: var(--accent);
            color: var(--primary-dark);
            border-color: var(--accent);
        }
        .btn-accent:hover {
            background: var(--accent-light);
            border-color: var(--accent-light);
            transform: translateY(-2px);
            box-shadow: var(--shadow-md);
            color: var(--primary-dark);
        }
        .btn-sm {
            padding: 10px 22px;
            font-size: 0.9rem;
        }
        .hero-visual {
            display: flex;
            justify-content: center;
            align-items: center;
            position: relative;
        }
        .hero-card {
            background: var(--bg);
            border-radius: var(--radius-lg);
            box-shadow: var(--shadow-lg);
            padding: 40px 36px;
            width: 100%;
            max-width: 440px;
            border: 1px solid var(--border-light);
            transition: transform var(--transition);
        }
        .hero-card:hover {
            transform: translateY(-4px);
        }
        .hero-card-stats {
            display: grid;
            grid-template-columns: 1fr 1fr 1fr;
            gap: 16px;
            margin-bottom: 24px;
            text-align: center;
        }
        .hero-card-stat .num {
            font-size: 2rem;
            font-weight: 800;
            color: var(--primary);
            line-height: 1.2;
        }
        .hero-card-stat .label {
            font-size: 0.8rem;
            color: var(--text-lighter);
            font-weight: 500;
        }
        .hero-card-divider {
            height: 1px;
            background: var(--border-light);
            margin: 20px 0;
        }
        .hero-card-features {
            display: flex;
            flex-direction: column;
            gap: 12px;
        }
        .hero-card-feat {
            display: flex;
            align-items: center;
            gap: 12px;
            font-size: 0.95rem;
            color: var(--text-light);
        }
        .hero-card-feat i {
            color: var(--accent-dark);
            width: 20px;
            font-size: 1rem;
        }

        /* ===== Section通用 ===== */
        .section {
            padding: 80px 0;
        }
        .section-alt {
            background: var(--bg-alt);
        }
        .section-dark {
            background: var(--bg-dark);
            color: rgba(255, 255, 255, 0.9);
        }
        .section-dark h2,
        .section-dark h3 {
            color: #fff;
        }
        .section-dark p {
            color: rgba(255, 255, 255, 0.7);
        }
        .section-header {
            text-align: center;
            max-width: 720px;
            margin: 0 auto 48px;
        }
        .section-header p {
            font-size: 1.05rem;
            color: var(--text-lighter);
        }
        .section-header .badge {
            display: inline-block;
            padding: 4px 16px;
            border-radius: 50px;
            background: rgba(201, 168, 76, 0.15);
            color: var(--accent-dark);
            font-size: 0.8rem;
            font-weight: 600;
            margin-bottom: 12px;
            letter-spacing: 0.5px;
        }

        /* ===== About / 核心说明 ===== */
        .about-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 60px;
            align-items: center;
        }
        .about-text p {
            font-size: 1.05rem;
        }
        .about-list {
            display: flex;
            flex-direction: column;
            gap: 16px;
            margin-top: 24px;
        }
        .about-list li {
            display: flex;
            align-items: flex-start;
            gap: 14px;
            font-size: 1rem;
            color: var(--text-light);
        }
        .about-list li i {
            color: var(--accent-dark);
            font-size: 1.15rem;
            margin-top: 2px;
            flex-shrink: 0;
        }
        .about-visual {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 16px;
        }
        .about-card {
            background: var(--bg);
            border-radius: var(--radius-md);
            padding: 28px 24px;
            box-shadow: var(--shadow-sm);
            border: 1px solid var(--border-light);
            text-align: center;
            transition: all var(--transition);
        }
        .about-card:hover {
            transform: translateY(-3px);
            box-shadow: var(--shadow-md);
        }
        .about-card .icon {
            font-size: 2rem;
            color: var(--accent-dark);
            margin-bottom: 12px;
        }
        .about-card h4 {
            font-size: 1.1rem;
            margin-bottom: 6px;
        }
        .about-card p {
            font-size: 0.9rem;
            color: var(--text-lighter);
            margin-bottom: 0;
        }

        /* ===== 分类入口 ===== */
        .category-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
            gap: 24px;
        }
        .category-card {
            background: var(--bg);
            border-radius: var(--radius-md);
            padding: 32px 28px;
            box-shadow: var(--shadow-sm);
            border: 1px solid var(--border-light);
            transition: all var(--transition);
            position: relative;
            overflow: hidden;
            display: flex;
            flex-direction: column;
        }
        .category-card:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow-lg);
            border-color: var(--accent);
        }
        .category-card .icon {
            font-size: 2.2rem;
            color: var(--accent-dark);
            margin-bottom: 16px;
        }
        .category-card h3 {
            margin-bottom: 8px;
        }
        .category-card p {
            font-size: 0.95rem;
            color: var(--text-lighter);
            margin-bottom: 20px;
            flex: 1;
        }
        .category-card .tag {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            font-size: 0.85rem;
            font-weight: 600;
            color: var(--accent-dark);
            transition: gap var(--transition);
        }
        .category-card .tag i {
            font-size: 0.75rem;
            transition: transform var(--transition);
        }
        .category-card:hover .tag i {
            transform: translateX(4px);
        }
        .category-card .badge-count {
            position: absolute;
            top: 16px;
            right: 16px;
            background: rgba(201, 168, 76, 0.12);
            color: var(--accent-dark);
            padding: 2px 12px;
            border-radius: 50px;
            font-size: 0.75rem;
            font-weight: 600;
        }

        /* ===== 资讯列表 (CMS) ===== */
        .news-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
            gap: 24px;
        }
        .news-card {
            background: var(--bg);
            border-radius: var(--radius-md);
            overflow: hidden;
            box-shadow: var(--shadow-sm);
            border: 1px solid var(--border-light);
            transition: all var(--transition);
            display: flex;
            flex-direction: column;
        }
        .news-card:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow-lg);
        }
        .news-card-body {
            padding: 24px 24px 20px;
            flex: 1;
            display: flex;
            flex-direction: column;
        }
        .news-card .meta {
            display: flex;
            align-items: center;
            gap: 12px;
            font-size: 0.8rem;
            color: var(--text-lighter);
            margin-bottom: 12px;
        }
        .news-card .meta .cat {
            background: rgba(15, 27, 61, 0.06);
            padding: 2px 12px;
            border-radius: 50px;
            color: var(--primary);
            font-weight: 500;
        }
        .news-card h3 {
            font-size: 1.1rem;
            margin-bottom: 8px;
            line-height: 1.4;
        }
        .news-card h3 a {
            color: var(--primary);
        }
        .news-card h3 a:hover {
            color: var(--accent-dark);
        }
        .news-card p {
            font-size: 0.92rem;
            color: var(--text-lighter);
            margin-bottom: 16px;
            flex: 1;
        }
        .news-card .read-more {
            font-size: 0.85rem;
            font-weight: 600;
            color: var(--accent-dark);
            display: flex;
            align-items: center;
            gap: 6px;
            margin-top: auto;
        }
        .news-card .read-more i {
            font-size: 0.75rem;
            transition: transform var(--transition);
        }
        .news-card:hover .read-more i {
            transform: translateX(4px);
        }
        .news-empty {
            grid-column: 1 / -1;
            text-align: center;
            padding: 48px 24px;
            color: var(--text-lighter);
            background: var(--bg);
            border-radius: var(--radius-md);
            border: 1px dashed var(--border);
        }
        .news-empty i {
            font-size: 2.4rem;
            color: var(--border);
            margin-bottom: 16px;
        }
        .news-empty p {
            font-size: 1rem;
        }

        /* ===== 数据/流程板块 ===== */
        .stats-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 24px;
            text-align: center;
        }
        .stat-item {
            padding: 32px 20px;
            background: rgba(255, 255, 255, 0.04);
            border-radius: var(--radius-md);
            border: 1px solid rgba(255, 255, 255, 0.06);
            transition: all var(--transition);
        }
        .stat-item:hover {
            background: rgba(255, 255, 255, 0.08);
            transform: translateY(-2px);
        }
        .stat-item .num {
            font-size: 2.6rem;
            font-weight: 800;
            color: var(--accent);
            line-height: 1.2;
            margin-bottom: 4px;
        }
        .stat-item .label {
            font-size: 0.95rem;
            color: rgba(255, 255, 255, 0.7);
            font-weight: 500;
        }

        /* ===== 特色功能 ===== */
        .features-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
            gap: 24px;
        }
        .feature-card {
            background: var(--bg);
            border-radius: var(--radius-md);
            padding: 32px 28px;
            box-shadow: var(--shadow-sm);
            border: 1px solid var(--border-light);
            transition: all var(--transition);
            text-align: center;
        }
        .feature-card:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow-lg);
        }
        .feature-card .icon {
            font-size: 2.4rem;
            color: var(--accent-dark);
            margin-bottom: 16px;
        }
        .feature-card h3 {
            margin-bottom: 8px;
        }
        .feature-card p {
            font-size: 0.95rem;
            color: var(--text-lighter);
            margin-bottom: 0;
        }

        /* ===== 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-md);
            border: 1px solid var(--border-light);
            overflow: hidden;
            transition: all var(--transition);
        }
        .faq-item:hover {
            border-color: var(--accent);
            box-shadow: var(--shadow-sm);
        }
        .faq-question {
            padding: 20px 24px;
            font-weight: 600;
            font-size: 1.05rem;
            color: var(--primary);
            display: flex;
            justify-content: space-between;
            align-items: center;
            cursor: pointer;
            transition: background var(--transition);
            user-select: none;
        }
        .faq-question:hover {
            background: rgba(15, 27, 61, 0.02);
        }
        .faq-question i {
            color: var(--accent-dark);
            font-size: 0.9rem;
            transition: transform var(--transition);
        }
        .faq-item.open .faq-question i {
            transform: rotate(180deg);
        }
        .faq-answer {
            padding: 0 24px 20px;
            color: var(--text-light);
            font-size: 0.95rem;
            line-height: 1.8;
            display: none;
        }
        .faq-item.open .faq-answer {
            display: block;
        }

        /* ===== CTA ===== */
        .cta-section {
            padding: 80px 0;
            background: linear-gradient(135deg, var(--primary) 0%, var(--primary-light) 100%);
            color: #fff;
            text-align: center;
        }
        .cta-section h2 {
            color: #fff;
            margin-bottom: 16px;
        }
        .cta-section p {
            color: rgba(255, 255, 255, 0.8);
            font-size: 1.1rem;
            max-width: 600px;
            margin: 0 auto 32px;
        }
        .cta-section .btn {
            border-color: #fff;
        }
        .cta-section .btn-primary {
            background: #fff;
            color: var(--primary);
            border-color: #fff;
        }
        .cta-section .btn-primary:hover {
            background: var(--accent-light);
            border-color: var(--accent-light);
            color: var(--primary-dark);
        }
        .cta-section .btn-secondary {
            color: #fff;
            border-color: rgba(255, 255, 255, 0.5);
        }
        .cta-section .btn-secondary:hover {
            background: rgba(255, 255, 255, 0.12);
            border-color: #fff;
            color: #fff;
        }

        /* ===== Footer ===== */
        .footer {
            background: var(--primary-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: #fff;
            margin-bottom: 12px;
        }
        .footer-brand .logo i {
            color: var(--accent);
        }
        .footer-brand .logo span {
            background: linear-gradient(135deg, #fff, var(--accent-light));
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }
        .footer-brand p {
            font-size: 0.9rem;
            color: rgba(255, 255, 255, 0.6);
            max-width: 300px;
            margin-bottom: 16px;
        }
        .footer-social {
            display: flex;
            gap: 12px;
        }
        .footer-social a {
            display: flex;
            align-items: center;
            justify-content: center;
            width: 36px;
            height: 36px;
            border-radius: 50%;
            background: rgba(255, 255, 255, 0.08);
            color: rgba(255, 255, 255, 0.7);
            transition: all var(--transition);
        }
        .footer-social a:hover {
            background: var(--accent);
            color: var(--primary-dark);
            transform: translateY(-2px);
        }
        .footer-col h4 {
            color: #fff;
            font-size: 1rem;
            margin-bottom: 16px;
        }
        .footer-col ul {
            display: flex;
            flex-direction: column;
            gap: 8px;
        }
        .footer-col ul a {
            color: rgba(255, 255, 255, 0.6);
            font-size: 0.9rem;
            transition: color var(--transition);
        }
        .footer-col ul a:hover {
            color: var(--accent-light);
        }
        .footer-bottom {
            border-top: 1px solid rgba(255, 255, 255, 0.08);
            padding-top: 20px;
            display: flex;
            justify-content: space-between;
            align-items: center;
            flex-wrap: wrap;
            gap: 12px;
            font-size: 0.85rem;
            color: rgba(255, 255, 255, 0.5);
        }
        .footer-bottom a {
            color: rgba(255, 255, 255, 0.5);
        }
        .footer-bottom a:hover {
            color: var(--accent-light);
        }

        /* ===== 响应式 ===== */
        @media (max-width: 1024px) {
            .hero .container {
                grid-template-columns: 1fr;
                gap: 40px;
                text-align: center;
            }
            .hero-content p {
                max-width: 100%;
                margin-left: auto;
                margin-right: auto;
            }
            .hero-buttons {
                justify-content: center;
            }
            .hero-card {
                max-width: 100%;
            }
            .about-grid {
                grid-template-columns: 1fr;
                gap: 40px;
            }
            .stats-grid {
                grid-template-columns: repeat(2, 1fr);
                gap: 16px;
            }
            .footer-grid {
                grid-template-columns: 1fr 1fr;
                gap: 32px;
            }
        }
        @media (max-width: 768px) {
            :root {
                --header-h: 64px;
                --topbar-h: 32px;
            }
            .topbar {
                font-size: 0.7rem;
                padding: 0 16px;
            }
            .topbar-left span:not(:first-child) {
                display: none;
            }
            .topbar-right a:not(.topbar-domain) {
                display: none;
            }
            .nav {
                display: none;
            }
            .nav-toggle {
                display: block;
            }
            .header .container {
                padding: 0 16px;
            }
            .hero {
                padding: 48px 0 60px;
            }
            .hero-card {
                padding: 28px 20px;
            }
            .hero-card-stats {
                grid-template-columns: 1fr 1fr 1fr;
                gap: 8px;
            }
            .hero-card-stat .num {
                font-size: 1.5rem;
            }
            .section {
                padding: 48px 0;
            }
            .section-header {
                margin-bottom: 32px;
            }
            .about-visual {
                grid-template-columns: 1fr;
            }
            .category-grid {
                grid-template-columns: 1fr;
            }
            .news-grid {
                grid-template-columns: 1fr;
            }
            .features-grid {
                grid-template-columns: 1fr;
            }
            .stats-grid {
                grid-template-columns: repeat(2, 1fr);
                gap: 12px;
            }
            .stat-item {
                padding: 20px 16px;
            }
            .stat-item .num {
                font-size: 2rem;
            }
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 24px;
            }
            .footer-bottom {
                flex-direction: column;
                text-align: center;
            }
            .cta-section {
                padding: 48px 0;
            }
            .faq-question {
                padding: 16px 18px;
                font-size: 0.95rem;
            }
            .faq-answer {
                padding: 0 18px 16px;
            }
        }
        @media (max-width: 520px) {
            .container {
                padding: 0 16px;
            }
            .hero-buttons .btn {
                width: 100%;
                justify-content: center;
            }
            .stats-grid {
                grid-template-columns: 1fr 1fr;
                gap: 8px;
            }
            .stat-item .num {
                font-size: 1.6rem;
            }
            .stat-item .label {
                font-size: 0.8rem;
            }
            .news-card-body {
                padding: 18px 18px 16px;
            }
            .category-card {
                padding: 24px 20px;
            }
            .feature-card {
                padding: 24px 20px;
            }
        }

        /* ===== 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;
        }
        .sr-only {
            position: absolute;
            width: 1px;
            height: 1px;
            padding: 0;
            margin: -1px;
            overflow: hidden;
            clip: rect(0, 0, 0, 0);
            border: 0;
        }

/* roulang page: article */
/* ===== 设计变量 ===== */
        :root {
            --primary: #2563eb;
            --primary-dark: #1d4ed8;
            --primary-light: #3b82f6;
            --primary-bg: #eff6ff;
            --secondary: #f59e0b;
            --secondary-dark: #d97706;
            --accent: #10b981;
            --accent-dark: #059669;
            --bg: #ffffff;
            --bg-alt: #f8fafc;
            --bg-card: #ffffff;
            --text: #0f172a;
            --text-light: #475569;
            --text-muted: #94a3b8;
            --border: #e2e8f0;
            --border-light: #f1f5f9;
            --radius: 12px;
            --radius-sm: 8px;
            --radius-lg: 16px;
            --shadow: 0 1px 3px rgba(0,0,0,0.06), 0 1px 2px rgba(0,0,0,0.04);
            --shadow-md: 0 4px 12px rgba(0,0,0,0.08);
            --shadow-lg: 0 12px 32px rgba(0,0,0,0.10);
            --transition: 0.25s cubic-bezier(0.4, 0, 0.2, 1);
            --font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
            --max-width: 1200px;
            --header-h: 72px;
            --topbar-h: 40px;
        }

        /* ===== 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: 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: 2px; }
        button { cursor: pointer; font-family: inherit; font-size: inherit; border: none; background: none; }
        input, textarea { font-family: inherit; font-size: inherit; }
        ul { list-style: none; }
        h1, h2, h3, h4, h5, h6 { line-height: 1.3; font-weight: 700; color: var(--text); }
        h1 { font-size: 2.25rem; }
        h2 { font-size: 1.75rem; }
        h3 { font-size: 1.25rem; }
        h4 { font-size: 1.1rem; }

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

        /* ===== 顶部信息条 ===== */
        .topbar {
            background: var(--text);
            color: var(--text-muted);
            font-size: 0.8rem;
            line-height: var(--topbar-h);
            height: var(--topbar-h);
            overflow: hidden;
        }
        .topbar .container {
            display: flex;
            justify-content: space-between;
            align-items: center;
            height: 100%;
        }
        .topbar-left span { color: #cbd5e1; }
        .topbar-left i { color: var(--secondary); margin-right: 6px; }
        .topbar-right a { color: #94a3b8; margin-left: 16px; transition: color var(--transition); }
        .topbar-right a:hover { color: #fff; }
        .topbar-right i { margin-right: 4px; }

        /* ===== Header / 导航 ===== */
        .header {
            position: sticky;
            top: 0;
            z-index: 100;
            background: rgba(255,255,255,0.96);
            backdrop-filter: blur(12px);
            -webkit-backdrop-filter: blur(12px);
            border-bottom: 1px solid var(--border);
            height: var(--header-h);
            display: flex;
            align-items: center;
            transition: box-shadow var(--transition);
        }
        .header.scrolled { box-shadow: var(--shadow-md); }
        .header .container {
            display: flex;
            align-items: center;
            justify-content: space-between;
            width: 100%;
        }
        .logo {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 1.35rem;
            font-weight: 800;
            color: var(--text);
        }
        .logo i { color: var(--primary); font-size: 1.5rem; }
        .logo span { background: linear-gradient(135deg, var(--primary), var(--primary-dark)); -webkit-background-clip: text; -webkit-text-fill-color: transparent; background-clip: text; }
        .logo:hover span { -webkit-text-fill-color: var(--primary); }
        .nav { display: flex; align-items: center; gap: 6px; }
        .nav a {
            padding: 8px 18px;
            border-radius: var(--radius-sm);
            color: var(--text-light);
            font-weight: 500;
            font-size: 0.95rem;
            transition: all var(--transition);
            position: relative;
        }
        .nav a:hover { color: var(--primary); background: var(--primary-bg); }
        .nav a.active { color: var(--primary); background: var(--primary-bg); font-weight: 600; }
        .nav a.active::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 50%;
            transform: translateX(-50%);
            width: 20px;
            height: 3px;
            background: var(--primary);
            border-radius: 2px;
        }
        .nav a.nav-cta {
            background: var(--primary);
            color: #fff;
            padding: 8px 22px;
            border-radius: 50px;
            font-weight: 600;
            box-shadow: 0 4px 12px rgba(37,99,235,0.3);
            margin-left: 8px;
        }
        .nav a.nav-cta:hover { background: var(--primary-dark); box-shadow: 0 6px 18px rgba(37,99,235,0.4); transform: translateY(-1px); color: #fff; }
        .nav a.nav-cta i { margin-right: 6px; }

        .nav-toggle {
            display: none;
            font-size: 1.5rem;
            color: var(--text);
            padding: 8px;
            border-radius: var(--radius-sm);
            transition: background var(--transition);
        }
        .nav-toggle:hover { background: var(--bg-alt); }

        /* ===== 文章页主区域 ===== */
        .article-wrapper {
            padding: 48px 0 64px;
            background: var(--bg-alt);
        }
        .article-container {
            display: grid;
            grid-template-columns: 1fr 320px;
            gap: 40px;
        }
        .article-main {
            background: var(--bg-card);
            border-radius: var(--radius-lg);
            box-shadow: var(--shadow);
            padding: 40px 48px;
            border: 1px solid var(--border);
        }
        .article-header {
            margin-bottom: 32px;
            padding-bottom: 24px;
            border-bottom: 1px solid var(--border);
        }
        .article-category {
            display: inline-block;
            background: var(--primary-bg);
            color: var(--primary);
            font-size: 0.8rem;
            font-weight: 600;
            padding: 4px 14px;
            border-radius: 50px;
            margin-bottom: 16px;
            letter-spacing: 0.3px;
        }
        .article-title {
            font-size: 2rem;
            font-weight: 800;
            line-height: 1.3;
            margin-bottom: 16px;
            color: var(--text);
        }
        .article-meta {
            display: flex;
            flex-wrap: wrap;
            gap: 20px;
            color: var(--text-muted);
            font-size: 0.9rem;
        }
        .article-meta i { margin-right: 6px; color: var(--primary-light); }
        .article-body {
            font-size: 1.05rem;
            line-height: 1.85;
            color: var(--text-light);
        }
        .article-body p {
            margin-bottom: 1.2em;
        }
        .article-body h2, .article-body h3, .article-body h4 {
            margin-top: 1.6em;
            margin-bottom: 0.6em;
            color: var(--text);
        }
        .article-body ul, .article-body ol {
            margin-bottom: 1.2em;
            padding-left: 1.6em;
        }
        .article-body li {
            margin-bottom: 0.4em;
        }
        .article-body blockquote {
            border-left: 4px solid var(--primary);
            background: var(--primary-bg);
            padding: 16px 24px;
            margin: 1.2em 0;
            border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
            color: var(--text-light);
            font-style: italic;
        }
        .article-body img {
            border-radius: var(--radius);
            margin: 1.5em 0;
            box-shadow: var(--shadow);
        }
        .article-body a {
            color: var(--primary);
            text-decoration: underline;
            text-underline-offset: 2px;
        }
        .article-body a:hover { color: var(--primary-dark); }

        .article-not-found {
            text-align: center;
            padding: 60px 20px;
        }
        .article-not-found i {
            font-size: 4rem;
            color: var(--text-muted);
            margin-bottom: 20px;
            display: block;
        }
        .article-not-found h2 {
            font-size: 1.6rem;
            margin-bottom: 12px;
        }
        .article-not-found p {
            color: var(--text-light);
            margin-bottom: 24px;
        }
        .article-not-found .btn {
            display: inline-block;
            padding: 12px 32px;
            background: var(--primary);
            color: #fff;
            border-radius: 50px;
            font-weight: 600;
            transition: all var(--transition);
        }
        .article-not-found .btn:hover { background: var(--primary-dark); transform: translateY(-2px); box-shadow: var(--shadow-md); }

        /* ===== 侧边栏 ===== */
        .article-sidebar {
            display: flex;
            flex-direction: column;
            gap: 28px;
        }
        .sidebar-card {
            background: var(--bg-card);
            border-radius: var(--radius);
            box-shadow: var(--shadow);
            padding: 24px;
            border: 1px solid var(--border);
        }
        .sidebar-card h3 {
            font-size: 1.05rem;
            font-weight: 700;
            margin-bottom: 16px;
            padding-bottom: 12px;
            border-bottom: 2px solid var(--primary-bg);
            display: flex;
            align-items: center;
            gap: 8px;
        }
        .sidebar-card h3 i { color: var(--primary); }
        .sidebar-list li {
            padding: 10px 0;
            border-bottom: 1px solid var(--border-light);
        }
        .sidebar-list li:last-child { border-bottom: none; }
        .sidebar-list a {
            display: flex;
            justify-content: space-between;
            align-items: center;
            color: var(--text-light);
            font-size: 0.92rem;
            transition: color var(--transition);
        }
        .sidebar-list a:hover { color: var(--primary); }
        .sidebar-list a span { color: var(--text-muted); font-size: 0.8rem; }
        .sidebar-cta {
            text-align: center;
        }
        .sidebar-cta p {
            color: var(--text-light);
            font-size: 0.95rem;
            margin-bottom: 16px;
        }
        .sidebar-cta .btn {
            display: block;
            padding: 12px;
            background: var(--primary);
            color: #fff;
            border-radius: var(--radius-sm);
            font-weight: 600;
            transition: all var(--transition);
        }
        .sidebar-cta .btn:hover { background: var(--primary-dark); transform: translateY(-1px); box-shadow: var(--shadow-md); }

        /* ===== 相关推荐 ===== */
        .related-section {
            margin-top: 48px;
            padding-top: 40px;
            border-top: 1px solid var(--border);
        }
        .related-section h2 {
            font-size: 1.4rem;
            margin-bottom: 24px;
            display: flex;
            align-items: center;
            gap: 10px;
        }
        .related-section h2 i { color: var(--primary); }
        .related-grid {
            display: grid;
            grid-template-columns: repeat(auto-fill, minmax(240px, 1fr));
            gap: 20px;
        }
        .related-card {
            background: var(--bg-alt);
            border-radius: var(--radius);
            padding: 20px;
            border: 1px solid var(--border);
            transition: all var(--transition);
        }
        .related-card:hover { border-color: var(--primary-light); box-shadow: var(--shadow-md); transform: translateY(-2px); }
        .related-card .tag { font-size: 0.75rem; color: var(--primary); font-weight: 600; margin-bottom: 8px; display: block; }
        .related-card h4 { font-size: 1rem; margin-bottom: 8px; }
        .related-card h4 a { color: var(--text); }
        .related-card h4 a:hover { color: var(--primary); }
        .related-card p { font-size: 0.88rem; color: var(--text-light); line-height: 1.5; }
        .related-card .date { font-size: 0.8rem; color: var(--text-muted); margin-top: 12px; display: block; }

        /* ===== 页脚 ===== */
        .footer {
            background: var(--text);
            color: #cbd5e1;
            padding: 48px 0 0;
        }
        .footer .logo span { -webkit-text-fill-color: #fff; }
        .footer .logo i { color: var(--primary-light); }
        .footer-grid {
            display: grid;
            grid-template-columns: 1.8fr 1fr 1fr 1fr;
            gap: 40px;
            padding-bottom: 32px;
            border-bottom: 1px solid #1e293b;
        }
        .footer-brand p { font-size: 0.9rem; line-height: 1.7; margin: 16px 0; color: #94a3b8; }
        .footer-social { display: flex; gap: 12px; margin-top: 12px; }
        .footer-social a {
            display: flex; align-items: center; justify-content: center;
            width: 40px; height: 40px; border-radius: 50%;
            background: #1e293b; color: #94a3b8;
            transition: all var(--transition);
        }
        .footer-social a:hover { background: var(--primary); color: #fff; transform: translateY(-2px); }
        .footer-col h4 { color: #fff; font-size: 1rem; font-weight: 600; margin-bottom: 16px; }
        .footer-col ul li { margin-bottom: 10px; }
        .footer-col ul a { color: #94a3b8; font-size: 0.9rem; transition: color var(--transition); }
        .footer-col ul a:hover { color: #fff; }
        .footer-bottom {
            display: flex; justify-content: space-between; align-items: center;
            padding: 20px 0; font-size: 0.85rem; color: #64748b;
            flex-wrap: wrap; gap: 12px;
        }
        .footer-bottom a { color: #94a3b8; }
        .footer-bottom a:hover { color: #fff; }

        /* ===== 响应式 ===== */
        @media (max-width: 1024px) {
            .article-container { grid-template-columns: 1fr; }
            .article-sidebar { display: grid; grid-template-columns: 1fr 1fr; gap: 20px; }
            .footer-grid { grid-template-columns: 1fr 1fr; }
        }
        @media (max-width: 768px) {
            :root { --header-h: 64px; --topbar-h: 36px; }
            h1 { font-size: 1.75rem; }
            h2 { font-size: 1.4rem; }
            .container { padding: 0 16px; }
            .topbar { font-size: 0.75rem; }
            .topbar-right a { margin-left: 10px; }
            .nav { display: none; position: absolute; top: var(--header-h); left: 0; right: 0; background: rgba(255,255,255,0.98); backdrop-filter: blur(12px); flex-direction: column; padding: 16px; border-bottom: 1px solid var(--border); box-shadow: var(--shadow-lg); gap: 4px; }
            .nav.open { display: flex; }
            .nav a { padding: 12px 16px; width: 100%; border-radius: var(--radius-sm); }
            .nav a.active::after { display: none; }
            .nav a.nav-cta { margin-left: 0; text-align: center; }
            .nav-toggle { display: block; }
            .article-main { padding: 24px 20px; }
            .article-title { font-size: 1.5rem; }
            .article-sidebar { grid-template-columns: 1fr; }
            .related-grid { grid-template-columns: 1fr; }
            .footer-grid { grid-template-columns: 1fr; gap: 28px; }
            .footer-bottom { flex-direction: column; text-align: center; }
        }
        @media (max-width: 520px) {
            .article-meta { flex-direction: column; gap: 8px; }
            .article-body { font-size: 0.98rem; }
            .sidebar-card { padding: 16px; }
        }

        /* ===== 工具类 ===== */
        .text-center { text-align: center; }
        .mt-16 { margin-top: 16px; }
        .mb-16 { margin-bottom: 16px; }
        .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: category1 */
/* ===== 设计变量 ===== */
        :root {
            --primary: #2563eb;
            --primary-dark: #1d4ed8;
            --primary-light: #3b82f6;
            --primary-bg: #eff6ff;
            --secondary: #0f172a;
            --accent: #f59e0b;
            --accent-light: #fbbf24;
            --bg: #ffffff;
            --bg-alt: #f8fafc;
            --bg-card: #ffffff;
            --text: #1e293b;
            --text-light: #64748b;
            --text-lighter: #94a3b8;
            --border: #e2e8f0;
            --border-light: #f1f5f9;
            --radius: 12px;
            --radius-sm: 8px;
            --radius-lg: 20px;
            --shadow: 0 4px 24px rgba(0, 0, 0, 0.06);
            --shadow-lg: 0 12px 48px rgba(0, 0, 0, 0.08);
            --shadow-hover: 0 12px 40px rgba(37, 99, 235, 0.12);
            --transition: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
            --font: 'PingFang SC', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
            --max-width: 1200px;
            --header-h: 76px;
            --topbar-h: 40px;
        }

        /* ===== Reset & Base ===== */
        *,
        *::before,
        *::after {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
        }
        html {
            scroll-behavior: smooth;
            -webkit-text-size-adjust: 100%;
        }
        body {
            font-family: var(--font);
            font-size: 16px;
            line-height: 1.7;
            color: var(--text);
            background: var(--bg);
            -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,
        select {
            font-family: inherit;
            font-size: inherit;
            outline: none;
            border: none;
        }
        button {
            cursor: pointer;
            background: none;
        }
        ul,
        ol {
            list-style: none;
        }
        h1,
        h2,
        h3,
        h4,
        h5,
        h6 {
            line-height: 1.3;
            color: var(--secondary);
            font-weight: 700;
        }
        h1 {
            font-size: 2.5rem;
        }
        h2 {
            font-size: 2rem;
        }
        h3 {
            font-size: 1.35rem;
        }
        h4 {
            font-size: 1.1rem;
        }
        p {
            margin-bottom: 1rem;
        }
        p:last-child {
            margin-bottom: 0;
        }
        .container {
            max-width: var(--max-width);
            margin: 0 auto;
            padding: 0 24px;
        }
        section {
            padding: 80px 0;
        }
        .section-title {
            text-align: center;
            margin-bottom: 16px;
            font-size: 2rem;
            color: var(--secondary);
        }
        .section-subtitle {
            text-align: center;
            color: var(--text-light);
            font-size: 1.1rem;
            max-width: 640px;
            margin: 0 auto 48px;
            line-height: 1.7;
        }
        .section-divider {
            width: 60px;
            height: 4px;
            background: var(--primary);
            border-radius: 2px;
            margin: 16px auto 48px;
        }

        /* ===== Header & Topbar ===== */
        .topbar {
            background: var(--secondary);
            color: var(--text-lighter);
            font-size: 0.8rem;
            height: var(--topbar-h);
            display: flex;
            align-items: center;
        }
        .topbar .container {
            display: flex;
            justify-content: space-between;
            align-items: center;
            width: 100%;
        }
        .topbar-left span {
            color: var(--text-lighter);
        }
        .topbar-left i {
            margin-right: 6px;
            color: var(--accent);
        }
        .topbar-right a {
            color: var(--text-lighter);
            margin-left: 20px;
            font-size: 0.8rem;
            transition: color var(--transition);
        }
        .topbar-right a:hover {
            color: #fff;
        }
        .topbar-right a i {
            margin-right: 4px;
        }

        .header {
            position: sticky;
            top: 0;
            z-index: 1000;
            background: rgba(255, 255, 255, 0.97);
            backdrop-filter: blur(12px);
            -webkit-backdrop-filter: blur(12px);
            border-bottom: 1px solid var(--border-light);
            height: var(--header-h);
            display: flex;
            align-items: center;
            transition: box-shadow var(--transition);
        }
        .header.scrolled {
            box-shadow: 0 4px 20px 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: 1.35rem;
            font-weight: 800;
            color: var(--secondary);
            letter-spacing: -0.5px;
        }
        .logo i {
            color: var(--primary);
            font-size: 1.6rem;
        }
        .logo span {
            background: linear-gradient(135deg, var(--primary), var(--primary-dark));
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }
        .logo:hover {
            color: var(--secondary);
        }

        .nav {
            display: flex;
            align-items: center;
            gap: 8px;
        }
        .nav a {
            padding: 8px 18px;
            border-radius: var(--radius-sm);
            font-size: 0.95rem;
            font-weight: 500;
            color: var(--text);
            transition: all var(--transition);
            position: relative;
        }
        .nav a:hover {
            color: var(--primary);
            background: var(--primary-bg);
        }
        .nav a.active {
            color: var(--primary);
            background: var(--primary-bg);
            font-weight: 600;
        }
        .nav a.active::after {
            content: '';
            position: absolute;
            bottom: 2px;
            left: 50%;
            transform: translateX(-50%);
            width: 20px;
            height: 3px;
            background: var(--primary);
            border-radius: 2px;
        }
        .nav .nav-cta {
            background: linear-gradient(135deg, var(--primary), var(--primary-dark));
            color: #fff !important;
            padding: 10px 24px;
            border-radius: var(--radius-sm);
            font-weight: 600;
            display: flex;
            align-items: center;
            gap: 8px;
            box-shadow: 0 4px 14px rgba(37, 99, 235, 0.3);
            transition: all var(--transition);
        }
        .nav .nav-cta:hover {
            transform: translateY(-2px);
            box-shadow: 0 8px 28px rgba(37, 99, 235, 0.35);
            background: linear-gradient(135deg, var(--primary-dark), #1a3f8a);
            color: #fff !important;
        }
        .nav .nav-cta i {
            font-size: 0.9rem;
        }

        .nav-toggle {
            display: none;
            font-size: 1.5rem;
            color: var(--secondary);
            padding: 6px 10px;
            border-radius: var(--radius-sm);
            transition: background var(--transition);
        }
        .nav-toggle:hover {
            background: var(--bg-alt);
        }

        /* ===== Page Hero ===== */
        .page-hero {
            background: linear-gradient(135deg, var(--secondary) 0%, #1a2a4a 100%);
            padding: 80px 0 72px;
            position: relative;
            overflow: hidden;
        }
        .page-hero::before {
            content: '';
            position: absolute;
            top: -40%;
            right: -20%;
            width: 600px;
            height: 600px;
            background: radial-gradient(circle, rgba(37, 99, 235, 0.15) 0%, transparent 70%);
            border-radius: 50%;
            pointer-events: none;
        }
        .page-hero::after {
            content: '';
            position: absolute;
            bottom: -30%;
            left: -10%;
            width: 400px;
            height: 400px;
            background: radial-gradient(circle, rgba(245, 158, 11, 0.08) 0%, transparent 70%);
            border-radius: 50%;
            pointer-events: none;
        }
        .page-hero .container {
            position: relative;
            z-index: 2;
        }
        .page-hero .breadcrumb {
            display: flex;
            align-items: center;
            gap: 8px;
            font-size: 0.85rem;
            color: var(--text-lighter);
            margin-bottom: 28px;
        }
        .page-hero .breadcrumb a {
            color: var(--text-lighter);
            transition: color var(--transition);
        }
        .page-hero .breadcrumb a:hover {
            color: #fff;
        }
        .page-hero .breadcrumb i {
            font-size: 0.6rem;
            color: var(--text-lighter);
        }
        .page-hero h1 {
            color: #fff;
            font-size: 2.6rem;
            font-weight: 800;
            margin-bottom: 16px;
            letter-spacing: -0.5px;
        }
        .page-hero p {
            color: rgba(255, 255, 255, 0.75);
            font-size: 1.15rem;
            max-width: 680px;
            line-height: 1.8;
            margin-bottom: 0;
        }
        .page-hero .hero-badges {
            display: flex;
            flex-wrap: wrap;
            gap: 12px;
            margin-top: 28px;
        }
        .page-hero .hero-badge {
            background: rgba(255, 255, 255, 0.1);
            backdrop-filter: blur(4px);
            border: 1px solid rgba(255, 255, 255, 0.12);
            color: rgba(255, 255, 255, 0.85);
            padding: 6px 18px;
            border-radius: 50px;
            font-size: 0.85rem;
            font-weight: 500;
            display: flex;
            align-items: center;
            gap: 6px;
        }
        .page-hero .hero-badge i {
            color: var(--accent-light);
        }

        /* ===== Guide Intro ===== */
        .guide-intro {
            background: var(--bg);
            padding: 80px 0;
        }
        .guide-intro .intro-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 64px;
            align-items: center;
        }
        .guide-intro .intro-text h2 {
            font-size: 1.8rem;
            margin-bottom: 20px;
            color: var(--secondary);
        }
        .guide-intro .intro-text p {
            color: var(--text-light);
            font-size: 1.05rem;
            line-height: 1.8;
            margin-bottom: 16px;
        }
        .guide-intro .intro-text .intro-list {
            margin-top: 24px;
        }
        .guide-intro .intro-text .intro-list li {
            display: flex;
            align-items: flex-start;
            gap: 14px;
            padding: 12px 0;
            border-bottom: 1px solid var(--border-light);
            font-size: 1rem;
            color: var(--text);
        }
        .guide-intro .intro-text .intro-list li:last-child {
            border-bottom: none;
        }
        .guide-intro .intro-text .intro-list li i {
            color: var(--primary);
            font-size: 1.1rem;
            margin-top: 2px;
            flex-shrink: 0;
        }
        .guide-intro .intro-visual {
            background: var(--bg-alt);
            border-radius: var(--radius-lg);
            padding: 32px;
            display: flex;
            flex-direction: column;
            gap: 20px;
            border: 1px solid var(--border-light);
        }
        .guide-intro .intro-visual .stat-row {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 16px;
        }
        .guide-intro .intro-visual .stat-card {
            background: var(--bg-card);
            border-radius: var(--radius);
            padding: 24px 20px;
            text-align: center;
            box-shadow: var(--shadow);
            border: 1px solid var(--border-light);
            transition: transform var(--transition), box-shadow var(--transition);
        }
        .guide-intro .intro-visual .stat-card:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow-hover);
        }
        .guide-intro .intro-visual .stat-card .num {
            font-size: 2rem;
            font-weight: 800;
            color: var(--primary);
            line-height: 1.2;
        }
        .guide-intro .intro-visual .stat-card .label {
            font-size: 0.9rem;
            color: var(--text-light);
            margin-top: 6px;
        }
        .guide-intro .intro-visual .stat-card .num .small {
            font-size: 1rem;
            font-weight: 600;
        }
        .guide-intro .intro-visual .stat-card.featured {
            background: var(--primary);
            color: #fff;
        }
        .guide-intro .intro-visual .stat-card.featured .num {
            color: #fff;
        }
        .guide-intro .intro-visual .stat-card.featured .label {
            color: rgba(255, 255, 255, 0.8);
        }

        /* ===== Guide Steps ===== */
        .guide-steps {
            background: var(--bg-alt);
            padding: 80px 0;
        }
        .guide-steps .steps-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 32px;
            margin-top: 16px;
        }
        .guide-steps .step-card {
            background: var(--bg-card);
            border-radius: var(--radius);
            padding: 36px 28px;
            box-shadow: var(--shadow);
            border: 1px solid var(--border-light);
            transition: all var(--transition);
            position: relative;
        }
        .guide-steps .step-card:hover {
            transform: translateY(-6px);
            box-shadow: var(--shadow-hover);
            border-color: var(--primary-bg);
        }
        .guide-steps .step-card .step-num {
            font-size: 2.8rem;
            font-weight: 800;
            color: var(--primary-bg);
            line-height: 1;
            margin-bottom: 12px;
            letter-spacing: -2px;
        }
        .guide-steps .step-card h3 {
            font-size: 1.2rem;
            margin-bottom: 12px;
            color: var(--secondary);
        }
        .guide-steps .step-card p {
            color: var(--text-light);
            font-size: 0.95rem;
            line-height: 1.7;
            margin-bottom: 0;
        }
        .guide-steps .step-card .step-icon {
            width: 48px;
            height: 48px;
            border-radius: 50%;
            background: var(--primary-bg);
            display: flex;
            align-items: center;
            justify-content: center;
            margin-bottom: 16px;
            color: var(--primary);
            font-size: 1.3rem;
        }

        /* ===== Feature Cards ===== */
        .guide-features {
            background: var(--bg);
            padding: 80px 0;
        }
        .guide-features .features-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 28px;
        }
        .guide-features .feature-item {
            background: var(--bg-card);
            border-radius: var(--radius);
            padding: 32px 24px;
            border: 1px solid var(--border-light);
            box-shadow: var(--shadow);
            transition: all var(--transition);
        }
        .guide-features .feature-item:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow-hover);
            border-color: var(--primary-bg);
        }
        .guide-features .feature-item .f-icon {
            width: 52px;
            height: 52px;
            border-radius: var(--radius-sm);
            background: var(--primary-bg);
            display: flex;
            align-items: center;
            justify-content: center;
            color: var(--primary);
            font-size: 1.4rem;
            margin-bottom: 18px;
            transition: background var(--transition), color var(--transition);
        }
        .guide-features .feature-item:hover .f-icon {
            background: var(--primary);
            color: #fff;
        }
        .guide-features .feature-item h3 {
            font-size: 1.1rem;
            margin-bottom: 10px;
            color: var(--secondary);
        }
        .guide-features .feature-item p {
            color: var(--text-light);
            font-size: 0.92rem;
            line-height: 1.7;
            margin-bottom: 0;
        }
        .guide-features .feature-item .f-tag {
            display: inline-block;
            padding: 2px 12px;
            border-radius: 50px;
            font-size: 0.75rem;
            font-weight: 600;
            background: var(--primary-bg);
            color: var(--primary);
            margin-top: 14px;
        }

        /* ===== Comparison ===== */
        .guide-compare {
            background: var(--bg-alt);
            padding: 80px 0;
        }
        .guide-compare .compare-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 32px;
        }
        .guide-compare .compare-card {
            background: var(--bg-card);
            border-radius: var(--radius-lg);
            padding: 36px 32px;
            box-shadow: var(--shadow);
            border: 1px solid var(--border-light);
            transition: all var(--transition);
        }
        .guide-compare .compare-card:hover {
            box-shadow: var(--shadow-hover);
            transform: translateY(-2px);
        }
        .guide-compare .compare-card .c-head {
            display: flex;
            align-items: center;
            gap: 14px;
            margin-bottom: 20px;
            padding-bottom: 16px;
            border-bottom: 2px solid var(--border-light);
        }
        .guide-compare .compare-card .c-head i {
            font-size: 1.8rem;
            width: 48px;
            height: 48px;
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            flex-shrink: 0;
        }
        .guide-compare .compare-card .c-head i.good {
            background: #dbeafe;
            color: var(--primary);
        }
        .guide-compare .compare-card .c-head i.bad {
            background: #fee2e2;
            color: #ef4444;
        }
        .guide-compare .compare-card .c-head h3 {
            font-size: 1.2rem;
            margin-bottom: 2px;
        }
        .guide-compare .compare-card .c-head .sub {
            font-size: 0.85rem;
            color: var(--text-light);
        }
        .guide-compare .compare-card ul li {
            display: flex;
            align-items: flex-start;
            gap: 12px;
            padding: 10px 0;
            font-size: 0.95rem;
            color: var(--text);
            border-bottom: 1px solid var(--border-light);
        }
        .guide-compare .compare-card ul li:last-child {
            border-bottom: none;
        }
        .guide-compare .compare-card ul li i {
            margin-top: 3px;
            flex-shrink: 0;
            font-size: 0.9rem;
        }
        .guide-compare .compare-card ul li i.good {
            color: #22c55e;
        }
        .guide-compare .compare-card ul li i.bad {
            color: #ef4444;
        }

        /* ===== FAQ ===== */
        .guide-faq {
            background: var(--bg);
            padding: 80px 0;
        }
        .guide-faq .faq-list {
            max-width: 800px;
            margin: 0 auto;
            display: flex;
            flex-direction: column;
            gap: 12px;
        }
        .guide-faq .faq-item {
            background: var(--bg-card);
            border: 1px solid var(--border-light);
            border-radius: var(--radius);
            overflow: hidden;
            transition: box-shadow var(--transition);
        }
        .guide-faq .faq-item:hover {
            box-shadow: var(--shadow);
        }
        .guide-faq .faq-item .faq-q {
            padding: 20px 24px;
            display: flex;
            justify-content: space-between;
            align-items: center;
            cursor: pointer;
            font-weight: 600;
            font-size: 1.02rem;
            color: var(--secondary);
            transition: background var(--transition);
            user-select: none;
        }
        .guide-faq .faq-item .faq-q:hover {
            background: var(--bg-alt);
        }
        .guide-faq .faq-item .faq-q i {
            color: var(--text-lighter);
            transition: transform var(--transition);
            font-size: 0.9rem;
        }
        .guide-faq .faq-item.open .faq-q i {
            transform: rotate(180deg);
            color: var(--primary);
        }
        .guide-faq .faq-item .faq-a {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.45s ease, padding 0.3s ease;
            padding: 0 24px;
            color: var(--text-light);
            font-size: 0.95rem;
            line-height: 1.8;
        }
        .guide-faq .faq-item.open .faq-a {
            max-height: 300px;
            padding: 0 24px 20px;
        }

        /* ===== CTA ===== */
        .guide-cta {
            background: linear-gradient(135deg, var(--secondary) 0%, #1a2a4a 100%);
            padding: 80px 0;
            text-align: center;
            position: relative;
            overflow: hidden;
        }
        .guide-cta::before {
            content: '';
            position: absolute;
            top: -30%;
            left: -10%;
            width: 500px;
            height: 500px;
            background: radial-gradient(circle, rgba(37, 99, 235, 0.12) 0%, transparent 70%);
            border-radius: 50%;
            pointer-events: none;
        }
        .guide-cta::after {
            content: '';
            position: absolute;
            bottom: -20%;
            right: -5%;
            width: 400px;
            height: 400px;
            background: radial-gradient(circle, rgba(245, 158, 11, 0.08) 0%, transparent 70%);
            border-radius: 50%;
            pointer-events: none;
        }
        .guide-cta .container {
            position: relative;
            z-index: 2;
        }
        .guide-cta h2 {
            color: #fff;
            font-size: 2rem;
            margin-bottom: 16px;
        }
        .guide-cta p {
            color: rgba(255, 255, 255, 0.7);
            font-size: 1.1rem;
            max-width: 560px;
            margin: 0 auto 32px;
            line-height: 1.8;
        }
        .guide-cta .cta-buttons {
            display: flex;
            justify-content: center;
            gap: 16px;
            flex-wrap: wrap;
        }
        .guide-cta .btn-primary {
            background: linear-gradient(135deg, var(--primary), var(--primary-dark));
            color: #fff;
            padding: 14px 40px;
            border-radius: var(--radius-sm);
            font-size: 1.05rem;
            font-weight: 700;
            display: inline-flex;
            align-items: center;
            gap: 10px;
            box-shadow: 0 6px 24px rgba(37, 99, 235, 0.35);
            transition: all var(--transition);
        }
        .guide-cta .btn-primary:hover {
            transform: translateY(-3px);
            box-shadow: 0 12px 36px rgba(37, 99, 235, 0.45);
            color: #fff;
        }
        .guide-cta .btn-outline {
            background: transparent;
            color: #fff;
            padding: 14px 36px;
            border-radius: var(--radius-sm);
            font-size: 1.05rem;
            font-weight: 600;
            border: 2px solid rgba(255, 255, 255, 0.25);
            display: inline-flex;
            align-items: center;
            gap: 10px;
            transition: all var(--transition);
        }
        .guide-cta .btn-outline:hover {
            border-color: #fff;
            background: rgba(255, 255, 255, 0.06);
            color: #fff;
            transform: translateY(-3px);
        }

        /* ===== Footer ===== */
        .footer {
            background: var(--secondary);
            color: rgba(255, 255, 255, 0.7);
            padding: 64px 0 0;
        }
        .footer .footer-grid {
            display: grid;
            grid-template-columns: 1.6fr 1fr 1fr 1fr;
            gap: 48px;
            padding-bottom: 40px;
            border-bottom: 1px solid rgba(255, 255, 255, 0.08);
        }
        .footer .footer-brand .logo {
            color: #fff;
            font-size: 1.3rem;
            margin-bottom: 16px;
            display: inline-flex;
        }
        .footer .footer-brand .logo span {
            background: linear-gradient(135deg, #60a5fa, #93c5fd);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }
        .footer .footer-brand .logo i {
            color: #60a5fa;
        }
        .footer .footer-brand p {
            font-size: 0.92rem;
            line-height: 1.7;
            margin-bottom: 20px;
            color: rgba(255, 255, 255, 0.6);
            max-width: 320px;
        }
        .footer .footer-social {
            display: flex;
            gap: 12px;
        }
        .footer .footer-social a {
            width: 40px;
            height: 40px;
            border-radius: 50%;
            background: rgba(255, 255, 255, 0.08);
            display: flex;
            align-items: center;
            justify-content: center;
            color: rgba(255, 255, 255, 0.6);
            font-size: 1.1rem;
            transition: all var(--transition);
        }
        .footer .footer-social a:hover {
            background: var(--primary);
            color: #fff;
            transform: translateY(-3px);
        }
        .footer .footer-col h4 {
            color: #fff;
            font-size: 1rem;
            font-weight: 700;
            margin-bottom: 20px;
            letter-spacing: 0.5px;
        }
        .footer .footer-col ul li {
            margin-bottom: 12px;
        }
        .footer .footer-col ul li a {
            color: rgba(255, 255, 255, 0.55);
            font-size: 0.9rem;
            transition: color var(--transition);
        }
        .footer .footer-col ul li a:hover {
            color: #fff;
        }
        .footer .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 .footer-bottom a {
            color: rgba(255, 255, 255, 0.5);
            transition: color var(--transition);
        }
        .footer .footer-bottom a:hover {
            color: #fff;
        }

        /* ===== Responsive ===== */
        @media (max-width: 1024px) {
            .guide-intro .intro-grid {
                gap: 40px;
            }
            .guide-steps .steps-grid,
            .guide-features .features-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .footer .footer-grid {
                grid-template-columns: 1.2fr 1fr 1fr;
                gap: 32px;
            }
        }

        @media (max-width: 768px) {
            :root {
                --header-h: 64px;
                --topbar-h: 36px;
            }
            h1 {
                font-size: 1.8rem;
            }
            h2 {
                font-size: 1.5rem;
            }
            h3 {
                font-size: 1.15rem;
            }
            section {
                padding: 56px 0;
            }
            .section-title {
                font-size: 1.5rem;
            }
            .section-subtitle {
                font-size: 0.95rem;
                margin-bottom: 32px;
            }
            .section-divider {
                margin-bottom: 32px;
            }

            .topbar-left span {
                font-size: 0.7rem;
            }
            .topbar-right a {
                font-size: 0.7rem;
                margin-left: 12px;
            }
            .topbar-right a span {
                display: none;
            }

            .nav {
                position: fixed;
                top: calc(var(--header-h) + var(--topbar-h));
                left: 0;
                right: 0;
                background: rgba(255, 255, 255, 0.98);
                backdrop-filter: blur(12px);
                -webkit-backdrop-filter: blur(12px);
                flex-direction: column;
                padding: 20px 24px;
                gap: 6px;
                border-bottom: 1px solid var(--border-light);
                box-shadow: 0 12px 40px rgba(0, 0, 0, 0.1);
                transform: translateY(-120%);
                opacity: 0;
                visibility: hidden;
                transition: all 0.4s ease;
                z-index: 999;
            }
            .nav.open {
                transform: translateY(0);
                opacity: 1;
                visibility: visible;
            }
            .nav a {
                padding: 12px 16px;
                width: 100%;
                border-radius: var(--radius-sm);
                font-size: 1rem;
            }
            .nav a.active::after {
                display: none;
            }
            .nav a.active {
                background: var(--primary-bg);
            }
            .nav .nav-cta {
                justify-content: center;
                margin-top: 8px;
                padding: 12px 24px;
            }
            .nav-toggle {
                display: block;
            }

            .page-hero {
                padding: 48px 0 52px;
            }
            .page-hero h1 {
                font-size: 1.8rem;
            }
            .page-hero p {
                font-size: 1rem;
            }
            .page-hero .hero-badges {
                gap: 8px;
            }
            .page-hero .hero-badge {
                font-size: 0.78rem;
                padding: 4px 14px;
            }

            .guide-intro .intro-grid {
                grid-template-columns: 1fr;
                gap: 32px;
            }
            .guide-intro .intro-visual .stat-row {
                grid-template-columns: 1fr 1fr;
            }

            .guide-steps .steps-grid {
                grid-template-columns: 1fr;
                gap: 20px;
            }
            .guide-features .features-grid {
                grid-template-columns: 1fr;
                gap: 20px;
            }
            .guide-compare .compare-grid {
                grid-template-columns: 1fr;
                gap: 20px;
            }
            .guide-compare .compare-card {
                padding: 28px 24px;
            }

            .guide-cta h2 {
                font-size: 1.5rem;
            }
            .guide-cta p {
                font-size: 0.95rem;
            }
            .guide-cta .btn-primary,
            .guide-cta .btn-outline {
                padding: 12px 28px;
                font-size: 0.95rem;
                width: 100%;
                justify-content: center;
            }

            .footer .footer-grid {
                grid-template-columns: 1fr 1fr;
                gap: 32px;
            }
            .footer .footer-brand {
                grid-column: 1 / -1;
            }
            .footer .footer-bottom {
                flex-direction: column;
                text-align: center;
            }
        }

        @media (max-width: 520px) {
            .container {
                padding: 0 16px;
            }
            .page-hero h1 {
                font-size: 1.5rem;
            }
            .guide-intro .intro-visual .stat-row {
                grid-template-columns: 1fr;
            }
            .footer .footer-grid {
                grid-template-columns: 1fr;
                gap: 24px;
            }
            .footer .footer-bottom {
                font-size: 0.78rem;
            }
        }

        /* ===== Accessibility ===== */
        a:focus-visible,
        button:focus-visible,
        input:focus-visible {
            outline: 2px solid var(--primary);
            outline-offset: 2px;
        }

        /* ===== Animations ===== */
        @keyframes fadeUp {
            from {
                opacity: 0;
                transform: translateY(24px);
            }
            to {
                opacity: 1;
                transform: translateY(0);
            }
        }
        .fade-up {
            animation: fadeUp 0.6s ease forwards;
        }
        .fade-up-delay-1 {
            animation-delay: 0.1s;
        }
        .fade-up-delay-2 {
            animation-delay: 0.2s;
        }
        .fade-up-delay-3 {
            animation-delay: 0.3s;
        }