/* roulang page: index */
:root {
            --primary: #4361ee;
            --primary-dark: #3a56d4;
            --primary-deep: #1e3a8a;
            --primary-soft: #eef2ff;
            --accent: #f72585;
            --accent-soft: #fde8f0;
            --dark: #0f172a;
            --dark-2: #1e293b;
            --bg-body: #f8fafc;
            --text-main: #1e293b;
            --text-muted: #64748b;
            --border: #e2e8f0;
            --white: #ffffff;
            --radius: 20px;
            --radius-sm: 12px;
            --radius-xs: 8px;
            --shadow: 0 4px 24px rgba(15, 23, 42, 0.08);
            --shadow-lg: 0 16px 48px rgba(15, 23, 42, 0.14);
            --shadow-primary: 0 8px 32px rgba(67, 97, 238, 0.28);
            --transition: all 0.3s ease;
            --sidebar-w: 262px;
            --font-base: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Noto Sans SC", sans-serif;
        }

        *,
        *::before,
        *::after {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
        }

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

        body {
            font-family: var(--font-base);
            background-color: var(--bg-body);
            color: var(--text-main);
            line-height: 1.75;
            font-size: 16px;
            overflow-x: hidden;
        }

        a {
            text-decoration: none;
            color: inherit;
            transition: var(--transition);
        }

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

        ul {
            list-style: none;
            padding: 0;
            margin: 0;
        }

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

        button:focus-visible,
        a:focus-visible,
        input:focus-visible {
            outline: 3px solid rgba(67, 97, 238, 0.4);
            outline-offset: 2px;
        }

        .container {
            max-width: 1180px;
            padding-left: 24px;
            padding-right: 24px;
        }

        .section-pad {
            padding: 90px 0;
        }

        @media (max-width: 768px) {
            .section-pad {
                padding: 60px 0;
            }
        }

        /* ==== 左侧导航 ==== */
        .sidebar {
            position: fixed;
            top: 0;
            left: 0;
            width: var(--sidebar-w);
            height: 100vh;
            background: var(--dark);
            z-index: 1045;
            display: flex;
            flex-direction: column;
            padding: 32px 24px;
            overflow-y: auto;
            transition: transform 0.35s ease;
        }

        .sidebar::before {
            content: "";
            position: absolute;
            top: 0;
            right: 0;
            width: 1px;
            height: 100%;
            background: linear-gradient(180deg, rgba(255, 255, 255, 0.08), rgba(255, 255, 255, 0.02));
        }

        .sidebar-inner {
            display: flex;
            flex-direction: column;
            height: 100%;
        }

        .brand-logo {
            display: flex;
            align-items: center;
            gap: 14px;
            padding: 6px 0 28px;
            border-bottom: 1px solid rgba(255, 255, 255, 0.08);
        }

        .brand-icon {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 48px;
            height: 48px;
            background: linear-gradient(135deg, var(--primary), var(--accent));
            border-radius: 14px;
            font-weight: 800;
            font-size: 18px;
            color: #fff;
            letter-spacing: -0.5px;
            flex-shrink: 0;
            box-shadow: 0 6px 20px rgba(67, 97, 238, 0.35);
        }

        .brand-name {
            font-size: 16px;
            font-weight: 700;
            line-height: 1.4;
            color: #fff;
            letter-spacing: 0.5px;
        }

        .brand-sub {
            display: block;
            font-size: 11px;
            font-weight: 400;
            color: rgba(255, 255, 255, 0.45);
            letter-spacing: 2px;
            margin-top: 2px;
        }

        .sidebar-nav {
            margin-top: 28px;
            flex: 1;
        }

        .sidebar-nav ul {
            display: flex;
            flex-direction: column;
            gap: 6px;
        }

        .sidebar-nav li a {
            display: flex;
            align-items: center;
            gap: 14px;
            padding: 13px 16px;
            border-radius: var(--radius-sm);
            color: rgba(255, 255, 255, 0.65);
            font-size: 15px;
            font-weight: 500;
            transition: var(--transition);
            border: 1px solid transparent;
        }

        .sidebar-nav li a i {
            width: 20px;
            text-align: center;
            font-size: 17px;
            opacity: 0.75;
        }

        .sidebar-nav li a:hover {
            background: rgba(255, 255, 255, 0.06);
            color: #fff;
            transform: translateX(4px);
        }

        .sidebar-nav li a.active {
            background: linear-gradient(135deg, rgba(67, 97, 238, 0.22), rgba(247, 37, 133, 0.12));
            color: #fff;
            border-color: rgba(67, 97, 238, 0.4);
            box-shadow: 0 4px 18px rgba(67, 97, 238, 0.15);
        }

        .sidebar-nav li a.active i {
            color: var(--accent);
            opacity: 1;
        }

        .sidebar-nav-label {
            font-size: 11px;
            text-transform: uppercase;
            letter-spacing: 2px;
            color: rgba(255, 255, 255, 0.3);
            padding: 12px 16px 8px;
            font-weight: 600;
        }

        .sidebar-card {
            background: rgba(255, 255, 255, 0.04);
            border: 1px solid rgba(255, 255, 255, 0.08);
            border-radius: 14px;
            padding: 18px 16px;
            display: flex;
            align-items: flex-start;
            gap: 12px;
        }

        .sidebar-card i {
            font-size: 20px;
            color: var(--primary);
            background: rgba(67, 97, 238, 0.18);
            width: 36px;
            height: 36px;
            display: inline-flex;
            align-items: center;
            justify-content: center;
            border-radius: 10px;
            flex-shrink: 0;
        }

        .sidebar-card p {
            color: rgba(255, 255, 255, 0.8);
            font-size: 13px;
            font-weight: 600;
            margin: 0;
            line-height: 1.4;
        }

        .sidebar-card span {
            color: rgba(255, 255, 255, 0.4);
            font-size: 12px;
        }

        /* ==== 主内容区 ==== */
        .main-wrapper {
            margin-left: var(--sidebar-w);
            min-height: 100vh;
            display: flex;
            flex-direction: column;
        }

        .main-content {
            flex: 1;
        }

        /* ==== 移动端导航 ==== */
        .mobile-topbar {
            display: none;
            position: sticky;
            top: 0;
            z-index: 1030;
            background: rgba(15, 23, 42, 0.95);
            backdrop-filter: blur(20px);
            padding: 14px 20px;
            align-items: center;
            justify-content: space-between;
        }

        .mobile-topbar .brand-logo {
            border-bottom: none;
            padding: 0;
        }

        .mobile-topbar .brand-icon {
            width: 38px;
            height: 38px;
            font-size: 14px;
            border-radius: 10px;
        }

        .mobile-topbar .brand-name {
            font-size: 15px;
        }

        .menu-toggle {
            width: 42px;
            height: 42px;
            display: inline-flex;
            align-items: center;
            justify-content: center;
            background: rgba(255, 255, 255, 0.12);
            border-radius: 12px;
            color: #fff;
            font-size: 18px;
            transition: var(--transition);
            cursor: pointer;
        }

        .menu-toggle:hover {
            background: rgba(255, 255, 255, 0.2);
        }

        .mobile-nav-menu {
            background: var(--dark);
            padding: 0 20px 20px;
            border-bottom: 1px solid rgba(255, 255, 255, 0.06);
        }

        .mobile-nav-list {
            display: flex;
            flex-direction: column;
            gap: 4px;
        }

        .mobile-nav-list li a {
            display: flex;
            align-items: center;
            gap: 12px;
            padding: 13px 14px;
            border-radius: var(--radius-sm);
            color: rgba(255, 255, 255, 0.7);
            font-size: 15px;
            font-weight: 500;
        }

        .mobile-nav-list li a i {
            width: 20px;
            text-align: center;
        }

        .mobile-nav-list li a.active {
            background: rgba(67, 97, 238, 0.18);
            color: #fff;
        }

        @media (max-width: 991.98px) {
            .sidebar {
                display: none;
            }
            .main-wrapper {
                margin-left: 0;
            }
            .mobile-topbar {
                display: flex;
            }
        }

        /* ==== Hero ==== */
        .hero {
            position: relative;
            min-height: 620px;
            display: flex;
            align-items: center;
            background-size: cover;
            background-position: center;
            padding: 80px 0;
            overflow: hidden;
        }

        .hero::before {
            content: "";
            position: absolute;
            inset: 0;
            background: linear-gradient(100deg, rgba(15, 23, 42, 0.94) 0%, rgba(15, 23, 42, 0.78) 45%, rgba(15, 23, 42, 0.55) 100%);
        }

        .hero::after {
            content: "";
            position: absolute;
            right: -80px;
            bottom: -80px;
            width: 420px;
            height: 420px;
            background: radial-gradient(circle, rgba(67, 97, 238, 0.4), transparent 70%);
            border-radius: 50%;
        }

        .hero .container {
            position: relative;
            z-index: 2;
        }

        .hero-tag {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            background: rgba(255, 255, 255, 0.1);
            backdrop-filter: blur(8px);
            border: 1px solid rgba(255, 255, 255, 0.18);
            color: rgba(255, 255, 255, 0.85);
            padding: 8px 18px;
            border-radius: 50px;
            font-size: 13px;
            letter-spacing: 1px;
            margin-bottom: 26px;
        }

        .hero-tag i {
            color: var(--accent);
        }

        .hero-title {
            font-size: 52px;
            font-weight: 800;
            color: #fff;
            line-height: 1.2;
            letter-spacing: -0.5px;
            margin-bottom: 18px;
        }

        .hero-title span {
            background: linear-gradient(120deg, #a5b4fc, #f0abfc);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }

        .hero-subtitle {
            font-size: 18px;
            color: rgba(255, 255, 255, 0.7);
            line-height: 1.8;
            max-width: 560px;
            margin-bottom: 36px;
        }

        .hero-btns {
            display: flex;
            gap: 16px;
            flex-wrap: wrap;
        }

        .btn-hero-primary {
            display: inline-flex;
            align-items: center;
            gap: 10px;
            background: linear-gradient(135deg, var(--primary), var(--primary-deep));
            color: #fff;
            padding: 16px 32px;
            border-radius: 50px;
            font-weight: 600;
            font-size: 16px;
            box-shadow: 0 10px 36px rgba(67, 97, 238, 0.4);
            transition: var(--transition);
            border: none;
        }

        .btn-hero-primary:hover {
            transform: translateY(-3px);
            box-shadow: 0 16px 44px rgba(67, 97, 238, 0.5);
            color: #fff;
        }

        .btn-hero-ghost {
            display: inline-flex;
            align-items: center;
            gap: 10px;
            background: rgba(255, 255, 255, 0.08);
            backdrop-filter: blur(8px);
            border: 1px solid rgba(255, 255, 255, 0.3);
            color: rgba(255, 255, 255, 0.9);
            padding: 16px 30px;
            border-radius: 50px;
            font-weight: 600;
            font-size: 16px;
            transition: var(--transition);
        }

        .btn-hero-ghost:hover {
            background: rgba(255, 255, 255, 0.16);
            border-color: rgba(255, 255, 255, 0.5);
            transform: translateY(-3px);
            color: #fff;
        }

        .hero-metrics {
            display: flex;
            gap: 32px;
            margin-top: 52px;
            padding-top: 32px;
            border-top: 1px solid rgba(255, 255, 255, 0.12);
            flex-wrap: wrap;
        }

        .hero-metric {
            display: flex;
            align-items: center;
            gap: 10px;
            color: rgba(255, 255, 255, 0.65);
            font-size: 13px;
        }

        .hero-metric i {
            color: var(--accent);
            font-size: 16px;
        }

        @media (max-width: 768px) {
            .hero {
                min-height: 540px;
                padding: 60px 0;
            }
            .hero-title {
                font-size: 34px;
            }
            .hero-subtitle {
                font-size: 15px;
            }
            .hero-btns {
                flex-direction: column;
                align-items: flex-start;
            }
            .hero-metrics {
                gap: 16px;
            }
        }

        /* ==== 通用板块 ==== */
        .section-head {
            text-align: center;
            max-width: 640px;
            margin: 0 auto 56px;
        }

        .section-tag {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            background: var(--primary-soft);
            color: var(--primary);
            font-size: 13px;
            font-weight: 600;
            padding: 6px 18px;
            border-radius: 50px;
            letter-spacing: 0.5px;
            margin-bottom: 16px;
        }

        .section-tag i {
            font-size: 12px;
        }

        .section-head h2 {
            font-size: 36px;
            font-weight: 800;
            color: var(--text-main);
            line-height: 1.25;
            margin-bottom: 12px;
        }

        .section-head p {
            color: var(--text-muted);
            font-size: 16px;
            line-height: 1.7;
        }

        @media (max-width: 768px) {
            .section-head h2 {
                font-size: 28px;
            }
        }

        /* ==== 平台简介 ==== */
        .about-section {
            background: var(--white);
            border-bottom: 1px solid var(--border);
        }

        .about-card {
            background: var(--white);
            border: 1px solid var(--border);
            border-radius: var(--radius);
            padding: 36px;
            box-shadow: var(--shadow);
            height: 100%;
            transition: var(--transition);
        }

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

        .about-card-icon {
            width: 60px;
            height: 60px;
            border-radius: 16px;
            display: inline-flex;
            align-items: center;
            justify-content: center;
            font-size: 22px;
            margin-bottom: 20px;
        }

        .about-card-icon.blue {
            background: var(--primary-soft);
            color: var(--primary);
        }

        .about-card-icon.pink {
            background: var(--accent-soft);
            color: var(--accent);
        }

        .about-card-icon.green {
            background: #ecfdf5;
            color: #10b981;
        }

        .about-card-icon.orange {
            background: #fff7ed;
            color: #f97316;
        }

        .about-card h3 {
            font-size: 18px;
            font-weight: 700;
            margin-bottom: 10px;
        }

        .about-card p {
            color: var(--text-muted);
            font-size: 14px;
            line-height: 1.75;
            margin: 0;
        }

        /* ==== 分类入口 ==== */
        .category-section {
            background: var(--bg-body);
        }

        .category-card {
            position: relative;
            border-radius: var(--radius);
            overflow: hidden;
            min-height: 280px;
            display: flex;
            align-items: flex-end;
            box-shadow: var(--shadow);
            transition: var(--transition);
            border: 1px solid var(--border);
        }

        .category-card:hover {
            transform: translateY(-6px);
            box-shadow: var(--shadow-lg);
        }

        .category-card img {
            position: absolute;
            inset: 0;
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform 0.5s ease;
        }

        .category-card:hover img {
            transform: scale(1.06);
        }

        .category-card-overlay {
            position: absolute;
            inset: 0;
            background: linear-gradient(180deg, rgba(15, 23, 42, 0.3) 0%, rgba(15, 23, 42, 0.88) 100%);
        }

        .category-card-body {
            position: relative;
            z-index: 2;
            padding: 30px;
            color: #fff;
            width: 100%;
        }

        .category-card-body .cat-label {
            display: inline-block;
            font-size: 12px;
            font-weight: 600;
            background: var(--accent);
            color: #fff;
            padding: 4px 14px;
            border-radius: 50px;
            margin-bottom: 12px;
            letter-spacing: 0.5px;
        }

        .category-card-body h3 {
            font-size: 22px;
            font-weight: 700;
            margin-bottom: 8px;
        }

        .category-card-body p {
            font-size: 14px;
            color: rgba(255, 255, 255, 0.75);
            margin-bottom: 18px;
            line-height: 1.7;
        }

        .category-card-link {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            font-size: 14px;
            font-weight: 600;
            color: #fff;
            background: rgba(255, 255, 255, 0.16);
            padding: 9px 22px;
            border-radius: 50px;
            backdrop-filter: blur(6px);
            border: 1px solid rgba(255, 255, 255, 0.2);
            transition: var(--transition);
        }

        .category-card-link:hover {
            background: var(--primary);
            border-color: var(--primary);
            color: #fff;
            transform: translateX(4px);
        }

        /* ==== 文章卡片 ==== */
        .latest-section {
            background: var(--white);
            border-top: 1px solid var(--border);
        }

        .article-card {
            display: block;
            background: var(--white);
            border: 1px solid var(--border);
            border-radius: var(--radius-sm);
            padding: 28px 26px;
            height: 100%;
            transition: var(--transition);
            position: relative;
            overflow: hidden;
        }

        .article-card::before {
            content: "";
            position: absolute;
            top: 0;
            left: 0;
            width: 4px;
            height: 0;
            background: linear-gradient(180deg, var(--primary), var(--accent));
            transition: height 0.35s ease;
        }

        .article-card:hover {
            box-shadow: var(--shadow-lg);
            transform: translateY(-5px);
            border-color: rgba(67, 97, 238, 0.3);
        }

        .article-card:hover::before {
            height: 100%;
        }

        .article-card-cat {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            background: var(--primary-soft);
            color: var(--primary);
            font-size: 12px;
            font-weight: 600;
            padding: 4px 14px;
            border-radius: 50px;
            margin-bottom: 14px;
        }

        .article-card h3 {
            font-size: 18px;
            font-weight: 700;
            line-height: 1.45;
            margin-bottom: 10px;
            color: var(--text-main);
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }

        .article-card p {
            font-size: 14px;
            color: var(--text-muted);
            line-height: 1.7;
            margin-bottom: 18px;
            display: -webkit-box;
            -webkit-line-clamp: 3;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }

        .article-card-date {
            font-size: 13px;
            color: #94a3b8;
            display: flex;
            align-items: center;
            gap: 8px;
        }

        .empty-state {
            text-align: center;
            padding: 60px 20px;
            background: var(--bg-body);
            border-radius: var(--radius);
            border: 1px dashed var(--border);
        }

        .empty-state i {
            font-size: 40px;
            color: #cbd5e1;
            margin-bottom: 16px;
        }

        .empty-state p {
            color: var(--text-muted);
            font-size: 15px;
            margin: 0;
        }

        /* ==== 数据统计 ==== */
        .stats-section {
            background: var(--dark);
            position: relative;
            overflow: hidden;
            padding: 70px 0;
        }

        .stats-section::before {
            content: "";
            position: absolute;
            top: -120px;
            right: -80px;
            width: 360px;
            height: 360px;
            background: radial-gradient(circle, rgba(67, 97, 238, 0.35), transparent);
        }

        .stats-section::after {
            content: "";
            position: absolute;
            bottom: -100px;
            left: -60px;
            width: 300px;
            height: 300px;
            background: radial-gradient(circle, rgba(247, 37, 133, 0.25), transparent);
        }

        .stats-section .container {
            position: relative;
            z-index: 2;
        }

        .stat-item {
            text-align: center;
            padding: 30px 20px;
            border-radius: var(--radius);
            background: rgba(255, 255, 255, 0.04);
            border: 1px solid rgba(255, 255, 255, 0.08);
            backdrop-filter: blur(8px);
            transition: var(--transition);
        }

        .stat-item:hover {
            transform: translateY(-4px);
            background: rgba(255, 255, 255, 0.07);
        }

        .stat-icon {
            font-size: 26px;
            color: var(--accent);
            margin-bottom: 16px;
        }

        .stat-number {
            font-size: 42px;
            font-weight: 800;
            color: #fff;
            line-height: 1.1;
            margin-bottom: 6px;
            letter-spacing: -1px;
        }

        .stat-label {
            font-size: 14px;
            color: rgba(255, 255, 255, 0.6);
            letter-spacing: 1px;
        }

        /* ==== 流程步骤 ==== */
        .steps-section {
            background: var(--bg-body);
        }

        .step-item {
            text-align: center;
            padding: 40px 28px;
            background: var(--white);
            border-radius: var(--radius);
            border: 1px solid var(--border);
            box-shadow: var(--shadow);
            height: 100%;
            position: relative;
            transition: var(--transition);
        }

        .step-item:hover {
            box-shadow: var(--shadow-lg);
            transform: translateY(-4px);
        }

        .step-number {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 68px;
            height: 68px;
            border-radius: 20px;
            background: linear-gradient(135deg, var(--primary), var(--primary-deep));
            color: #fff;
            font-size: 24px;
            font-weight: 800;
            margin-bottom: 20px;
            box-shadow: 0 8px 24px rgba(67, 97, 238, 0.3);
        }

        .step-item h3 {
            font-size: 18px;
            font-weight: 700;
            margin-bottom: 10px;
        }

        .step-item p {
            color: var(--text-muted);
            font-size: 14px;
            line-height: 1.7;
            margin: 0;
        }

        .step-arrow {
            position: absolute;
            top: 50%;
            right: -22px;
            transform: translateY(-50%);
            color: var(--primary);
            font-size: 20px;
            z-index: 3;
            opacity: 0.4;
        }

        @media (max-width: 768px) {
            .step-arrow {
                display: none;
            }
        }

        /* ==== FAQ ==== */
        .faq-section {
            background: var(--white);
        }

        .faq-item {
            background: var(--bg-body);
            border: 1px solid var(--border);
            border-radius: var(--radius-sm);
            padding: 22px 26px;
            margin-bottom: 16px;
            transition: var(--transition);
        }

        .faq-item:hover {
            border-color: rgba(67, 97, 238, 0.3);
            box-shadow: var(--shadow);
        }

        .faq-question {
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 16px;
            cursor: pointer;
            font-weight: 600;
            font-size: 16px;
            color: var(--text-main);
            margin: 0;
        }

        .faq-question i {
            color: var(--primary);
            font-size: 18px;
            flex-shrink: 0;
            transition: var(--transition);
        }

        .faq-item.open .faq-question i {
            transform: rotate(180deg);
            color: var(--accent);
        }

        .faq-answer {
            display: none;
            padding-top: 14px;
            color: var(--text-muted);
            font-size: 14px;
            line-height: 1.75;
            border-top: 1px dashed var(--border);
            margin-top: 14px;
        }

        .faq-item.open .faq-answer {
            display: block;
            animation: fadeIn 0.3s ease;
        }

        @keyframes fadeIn {
            from {
                opacity: 0;
                transform: translateY(-6px);
            }
            to {
                opacity: 1;
                transform: translateY(0);
            }
        }

        /* ==== CTA ==== */
        .cta-section {
            position: relative;
            padding: 80px 0;
            background-size: cover;
            background-position: center;
            background-color: var(--dark);
        }

        .cta-section::before {
            content: "";
            position: absolute;
            inset: 0;
            background: linear-gradient(120deg, rgba(15, 23, 42, 0.95), rgba(67, 97, 238, 0.75));
        }

        .cta-section .container {
            position: relative;
            z-index: 2;
            text-align: center;
            max-width: 760px;
        }

        .cta-title {
            font-size: 34px;
            font-weight: 800;
            color: #fff;
            margin-bottom: 16px;
        }

        .cta-text {
            color: rgba(255, 255, 255, 0.75);
            font-size: 16px;
            line-height: 1.8;
            margin-bottom: 32px;
        }

        .btn-cta {
            display: inline-flex;
            align-items: center;
            gap: 10px;
            background: #fff;
            color: var(--primary-dark);
            padding: 16px 36px;
            border-radius: 50px;
            font-weight: 700;
            font-size: 16px;
            transition: var(--transition);
            box-shadow: 0 10px 30px rgba(0, 0, 0, 0.2);
        }

        .btn-cta:hover {
            transform: translateY(-3px) scale(1.02);
            box-shadow: 0 16px 40px rgba(0, 0, 0, 0.28);
            color: var(--primary);
        }

        @media (max-width: 768px) {
            .cta-title {
                font-size: 26px;
            }
        }

        /* ==== Footer ==== */
        .site-footer {
            background: var(--dark-2);
            padding: 60px 0 30px;
            color: rgba(255, 255, 255, 0.6);
        }

        .footer-brand .brand-logo {
            border-bottom: 1px solid rgba(255, 255, 255, 0.1);
            margin-bottom: 18px;
            padding-bottom: 18px;
        }

        .footer-desc {
            font-size: 14px;
            line-height: 1.75;
            color: rgba(255, 255, 255, 0.5);
            margin-bottom: 20px;
        }

        .footer-title {
            font-size: 15px;
            font-weight: 700;
            color: #fff;
            margin-bottom: 16px;
            letter-spacing: 0.5px;
        }

        .footer-links {
            display: flex;
            flex-direction: column;
            gap: 8px;
        }

        .footer-links a {
            font-size: 14px;
            color: rgba(255, 255, 255, 0.55);
            transition: var(--transition);
            display: inline-flex;
            align-items: center;
            gap: 8px;
        }

        .footer-links a i {
            font-size: 11px;
            opacity: 0.6;
        }

        .footer-links a:hover {
            color: #fff;
            transform: translateX(4px);
        }

        .footer-divider {
            border-top: 1px solid rgba(255, 255, 255, 0.08);
            margin: 36px 0 20px;
        }

        .footer-bottom {
            display: flex;
            align-items: center;
            justify-content: space-between;
            flex-wrap: wrap;
            gap: 12px;
            font-size: 13px;
            color: rgba(255, 255, 255, 0.35);
        }

        .footer-bottom .footer-domain {
            font-size: 12px;
            opacity: 0.6;
            word-break: break-all;
        }

        @media (max-width: 768px) {
            .site-footer {
                padding: 40px 0 20px;
            }
            .footer-bottom {
                flex-direction: column;
                text-align: center;
            }
        }

        /* ==== 按钮通用 ==== */
        .btn-primary-custom {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            background: var(--primary);
            color: #fff;
            padding: 12px 28px;
            border-radius: 50px;
            font-weight: 600;
            font-size: 15px;
            border: 2px solid var(--primary);
            transition: var(--transition);
            cursor: pointer;
        }

        .btn-primary-custom:hover {
            background: var(--primary-dark);
            border-color: var(--primary-dark);
            transform: translateY(-2px);
            box-shadow: 0 8px 24px rgba(67, 97, 238, 0.35);
            color: #fff;
        }

        .btn-outline-custom {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            background: transparent;
            color: var(--primary);
            padding: 12px 28px;
            border-radius: 50px;
            font-weight: 600;
            font-size: 15px;
            border: 2px solid var(--primary);
            transition: var(--transition);
            cursor: pointer;
        }

        .btn-outline-custom:hover {
            background: var(--primary-soft);
            transform: translateY(-2px);
            color: var(--primary-dark);
        }

        /* ==== 响应式 ==== */
        @media (max-width: 991.98px) {
            .section-head {
                margin-bottom: 40px;
            }
        }

        @media (max-width: 768px) {
            body {
                font-size: 15px;
            }
            .container {
                padding-left: 18px;
                padding-right: 18px;
            }
            .section-head h2 {
                font-size: 26px;
            }
            .hero-title {
                font-size: 32px;
            }
            .hero-subtitle {
                font-size: 15px;
            }
            .stat-number {
                font-size: 32px;
            }
            .category-card {
                min-height: 220px;
            }
            .article-card {
                padding: 22px 20px;
            }
        }

        @media (max-width: 520px) {
            .hero-metrics {
                flex-direction: column;
                gap: 10px;
            }
            .hero-btns .btn-hero-primary,
            .hero-btns .btn-hero-ghost {
                width: 100%;
                justify-content: center;
            }
            .stat-item {
                padding: 20px 14px;
            }
            .footer-bottom {
                flex-direction: column;
            }
        }

/* roulang page: category1 */
:root {
            --c-primary: #4F46E5;
            --c-primary-600: #4338CA;
            --c-primary-50: #EEF2FF;
            --c-accent: #0EA5E9;
            --c-dark: #0B1120;
            --c-dark-800: #111827;
            --c-dark-700: #1F2937;
            --c-bg: #F8FAFC;
            --c-surface: #FFFFFF;
            --c-border: #E2E8F0;
            --c-text: #1E293B;
            --c-text-light: #64748B;
            --c-text-mute: #94A3B8;
            --c-success: #10B981;
            --c-warning: #F59E0B;
            --c-danger: #EF4444;
            --radius-lg: 16px;
            --radius-md: 12px;
            --radius-sm: 8px;
            --shadow-sm: 0 1px 3px rgba(0, 0, 0, .05);
            --shadow-md: 0 8px 24px rgba(0, 0, 0, .06);
            --shadow-lg: 0 20px 40px rgba(79, 70, 229, .12);
            --transition-base: all .3s ease;
            --font-base: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Noto Sans SC", "Microsoft YaHei", sans-serif;
        }
        *,
        *::before,
        *::after {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
        }
        html {
            scroll-behavior: smooth;
            -webkit-text-size-adjust: 100%;
        }
        body {
            font-family: var(--font-base);
            background: var(--c-bg);
            color: var(--c-text);
            line-height: 1.7;
            font-size: 16px;
            min-height: 100vh;
            display: flex;
            flex-direction: column;
        }
        a {
            color: var(--c-primary);
            text-decoration: none;
            transition: var(--transition-base);
        }
        a:hover {
            color: var(--c-primary-600);
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
        }
        .container {
            max-width: 1320px;
            padding-left: 24px;
            padding-right: 24px;
        }

        /* ===== 侧边导航布局 ===== */
        .app-shell {
            display: flex;
            min-height: 100vh;
            background: var(--c-bg);
        }
        .sidebar {
            width: 280px;
            background: var(--c-dark);
            background-image: linear-gradient(160deg, #0B1120 0%, #111827 60%, #1a1f2e 100%);
            padding: 32px 20px;
            position: fixed;
            top: 0;
            bottom: 0;
            left: 0;
            z-index: 1050;
            display: flex;
            flex-direction: column;
            border-right: 1px solid rgba(255, 255, 255, .06);
            overflow-y: auto;
            transition: var(--transition-base);
        }
        .sidebar::-webkit-scrollbar {
            width: 4px;
        }
        .sidebar::-webkit-scrollbar-thumb {
            background: rgba(255, 255, 255, .15);
            border-radius: 4px;
        }
        .sidebar-brand {
            padding: 8px 12px 28px;
            border-bottom: 1px solid rgba(255, 255, 255, .08);
            margin-bottom: 20px;
        }
        .brand-logo {
            display: flex;
            align-items: center;
            gap: 12px;
            color: #fff;
        }
        .brand-logo:hover {
            color: #fff;
            opacity: .9;
        }
        .brand-icon {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 42px;
            height: 42px;
            background: linear-gradient(135deg, #4F46E5, #0EA5E9);
            border-radius: 12px;
            font-size: 15px;
            font-weight: 800;
            color: #fff;
            letter-spacing: .5px;
            box-shadow: 0 4px 16px rgba(79, 70, 229, .35);
            flex-shrink: 0;
        }
        .brand-name {
            font-size: 17px;
            font-weight: 700;
            line-height: 1.3;
            color: #fff;
            display: flex;
            flex-direction: column;
            gap: 2px;
        }
        .brand-sub {
            font-size: 12px;
            font-weight: 400;
            color: rgba(255, 255, 255, .55);
            letter-spacing: 1px;
        }
        .sidebar-nav {
            padding: 0;
            flex: 1;
        }
        .sidebar-nav-label {
            font-size: 12px;
            text-transform: uppercase;
            letter-spacing: 2px;
            color: rgba(255, 255, 255, .30);
            font-weight: 600;
            padding: 0 12px;
            margin-bottom: 12px;
        }
        .sidebar-nav ul {
            list-style: none;
            margin: 0;
            padding: 0;
            display: flex;
            flex-direction: column;
            gap: 4px;
        }
        .sidebar-nav ul li a {
            display: flex;
            align-items: center;
            gap: 12px;
            padding: 12px 16px;
            border-radius: 10px;
            color: rgba(255, 255, 255, .75);
            font-size: 15px;
            font-weight: 500;
            transition: var(--transition-base);
            border: 1px solid transparent;
        }
        .sidebar-nav ul li a i {
            width: 20px;
            text-align: center;
            font-size: 15px;
            opacity: .8;
            transition: var(--transition-base);
        }
        .sidebar-nav ul li a:hover {
            background: rgba(255, 255, 255, .07);
            color: #fff;
            transform: translateX(4px);
        }
        .sidebar-nav ul li a:hover i {
            opacity: 1;
            transform: scale(1.1);
        }
        .sidebar-nav ul li a.active {
            background: linear-gradient(135deg, rgba(79, 70, 229, .25), rgba(14, 165, 233, .15));
            border-color: rgba(99, 102, 241, .3);
            color: #fff;
            font-weight: 600;
        }
        .sidebar-nav ul li a.active i {
            color: #A5B4FC;
            opacity: 1;
        }
        .sidebar-nav ul li a.active::before {
            content: "";
            width: 6px;
            height: 6px;
            background: #4F46E5;
            border-radius: 50%;
            position: absolute;
            left: -18px;
        }
        .sidebar-meta {
            padding: 16px 12px 8px;
            border-top: 1px solid rgba(255, 255, 255, .08);
            margin-top: 12px;
        }
        .sidebar-meta p {
            font-size: 12px;
            color: rgba(255, 255, 255, .35);
            margin: 0;
            line-height: 1.6;
        }
        .main-wrapper {
            flex: 1;
            margin-left: 280px;
            display: flex;
            flex-direction: column;
            min-height: 100vh;
            background: var(--c-bg);
        }
        .main-content {
            flex: 1;
            padding: 0 32px 48px;
        }

        /* ===== 页面横幅 (Banner) ===== */
        .page-banner {
            position: relative;
            padding: 72px 0 72px;
            overflow: hidden;
            border-radius: 0 0 24px 24px;
            background: linear-gradient(135deg, #0B1120 0%, #111827 50%, #1e1b4b 100%);
            margin-bottom: 48px;
        }
        .page-banner::before {
            content: "";
            position: absolute;
            inset: 0;
            background-image: url('/assets/images/backpic/back-1.png');
            background-size: cover;
            background-position: center;
            opacity: .18;
            z-index: 0;
        }
        .page-banner::after {
            content: "";
            position: absolute;
            top: -60%;
            right: -20%;
            width: 480px;
            height: 480px;
            background: radial-gradient(circle, rgba(79, 70, 229, .25), transparent 60%);
            z-index: 0;
        }
        .page-banner .banner-inner {
            position: relative;
            z-index: 1;
            padding: 40px 64px;
        }
        .banner-tag {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            background: rgba(79, 70, 229, .2);
            border: 1px solid rgba(99, 102, 241, .3);
            color: #A5B4FC;
            padding: 6px 16px;
            border-radius: 999px;
            font-size: 13px;
            font-weight: 600;
            letter-spacing: .5px;
            margin-bottom: 20px;
        }
        .banner-title {
            color: #fff;
            font-size: 42px;
            font-weight: 800;
            line-height: 1.2;
            margin-bottom: 16px;
            letter-spacing: -0.5px;
        }
        .banner-title span {
            background: linear-gradient(135deg, #A5B4FC, #67E8F9);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }
        .banner-desc {
            color: rgba(255, 255, 255, .75);
            font-size: 16px;
            max-width: 620px;
            margin-bottom: 0;
            line-height: 1.8;
        }
        .banner-stats {
            display: flex;
            gap: 32px;
            margin-top: 32px;
            padding-top: 28px;
            border-top: 1px solid rgba(255, 255, 255, .1);
        }
        .banner-stats .stat-item {
            display: flex;
            flex-direction: column;
            gap: 4px;
        }
        .banner-stats .stat-num {
            font-size: 28px;
            font-weight: 800;
            color: #fff;
            line-height: 1.2;
        }
        .banner-stats .stat-label {
            font-size: 13px;
            color: rgba(255, 255, 255, .55);
        }

        /* ===== 版块通用 ===== */
        .section-block {
            padding: 48px 0;
        }
        .section-header {
            margin-bottom: 36px;
        }
        .section-tag {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            background: var(--c-primary-50);
            color: var(--c-primary);
            font-size: 13px;
            font-weight: 600;
            padding: 6px 16px;
            border-radius: 999px;
            margin-bottom: 14px;
            border: 1px solid rgba(79, 70, 229, .1);
        }
        .section-title {
            font-size: 32px;
            font-weight: 800;
            color: var(--c-dark);
            letter-spacing: -0.3px;
            margin-bottom: 12px;
            line-height: 1.3;
        }
        .section-subtitle {
            font-size: 16px;
            color: var(--c-text-light);
            max-width: 680px;
            line-height: 1.8;
        }

        /* ===== 封面卡片 ===== */
        .cover-card {
            background: var(--c-surface);
            border-radius: var(--radius-lg);
            overflow: hidden;
            border: 1px solid var(--c-border);
            box-shadow: var(--shadow-sm);
            transition: var(--transition-base);
            height: 100%;
            display: flex;
            flex-direction: column;
        }
        .cover-card:hover {
            transform: translateY(-6px);
            box-shadow: var(--shadow-md);
            border-color: rgba(79, 70, 229, .2);
        }
        .cover-card .card-img-wrap {
            position: relative;
            overflow: hidden;
            aspect-ratio: 16/9;
            background: var(--c-dark-700);
        }
        .cover-card .card-img-wrap img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform .5s ease;
        }
        .cover-card:hover .card-img-wrap img {
            transform: scale(1.05);
        }
        .cover-card .card-img-wrap::after {
            content: "";
            position: absolute;
            inset: 0;
            background: linear-gradient(to top, rgba(11, 17, 32, .6), transparent 50%);
            opacity: .7;
            transition: var(--transition-base);
        }
        .cover-card:hover .card-img-wrap::after {
            opacity: .5;
        }
        .cover-card .card-img-wrap .card-badge {
            position: absolute;
            top: 16px;
            left: 16px;
            z-index: 2;
            background: rgba(255, 255, 255, .92);
            color: var(--c-dark);
            padding: 4px 12px;
            border-radius: 999px;
            font-size: 12px;
            font-weight: 600;
            backdrop-filter: blur(8px);
        }
        .cover-card .card-body {
            padding: 24px;
            flex: 1;
        }
        .cover-card .card-title {
            font-size: 18px;
            font-weight: 700;
            color: var(--c-dark);
            margin-bottom: 10px;
            line-height: 1.4;
        }
        .cover-card .card-text {
            font-size: 14px;
            color: var(--c-text-light);
            line-height: 1.7;
            margin-bottom: 16px;
            display: -webkit-box;
            -webkit-line-clamp: 3;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }
        .cover-card .card-link {
            font-size: 14px;
            font-weight: 600;
            color: var(--c-primary);
            display: inline-flex;
            align-items: center;
            gap: 6px;
            transition: var(--transition-base);
        }
        .cover-card .card-link:hover {
            gap: 10px;
            color: var(--c-primary-600);
        }
        .card-meta-list {
            display: flex;
            flex-wrap: wrap;
            gap: 12px;
            margin-bottom: 12px;
        }
        .card-meta-list .meta-item {
            display: flex;
            align-items: center;
            gap: 6px;
            font-size: 12px;
            color: var(--c-text-mute);
        }
        .card-meta-list .meta-item i {
            color: var(--c-primary);
            font-size: 12px;
            opacity: .7;
        }

        /* ===== 入口指引列表 ===== */
        .guide-item {
            display: flex;
            gap: 20px;
            padding: 28px;
            background: var(--c-surface);
            border-radius: var(--radius-lg);
            border: 1px solid var(--c-border);
            box-shadow: var(--shadow-sm);
            transition: var(--transition-base);
            margin-bottom: 16px;
        }
        .guide-item:hover {
            box-shadow: var(--shadow-md);
            border-color: rgba(79, 70, 229, .15);
            transform: translateX(4px);
        }
        .guide-item .step-num {
            flex-shrink: 0;
            width: 48px;
            height: 48px;
            display: flex;
            align-items: center;
            justify-content: center;
            background: linear-gradient(135deg, var(--c-primary), var(--c-accent));
            color: #fff;
            border-radius: 12px;
            font-size: 18px;
            font-weight: 800;
            box-shadow: 0 4px 12px rgba(79, 70, 229, .25);
        }
        .guide-item .step-body {
            flex: 1;
        }
        .guide-item .step-body h3 {
            font-size: 18px;
            font-weight: 700;
            margin-bottom: 6px;
            color: var(--c-dark);
        }
        .guide-item .step-body p {
            font-size: 14px;
            color: var(--c-text-light);
            line-height: 1.7;
            margin-bottom: 8px;
        }
        .guide-item .step-body .step-tag {
            display: inline-block;
            background: var(--c-primary-50);
            color: var(--c-primary);
            font-size: 12px;
            font-weight: 600;
            padding: 3px 10px;
            border-radius: 999px;
            margin-right: 8px;
            margin-bottom: 4px;
            border: 1px solid rgba(79, 70, 229, .1);
        }

        /* ===== 安全提示卡片 ===== */
        .tip-card {
            background: var(--c-surface);
            border-radius: var(--radius-md);
            padding: 24px;
            border: 1px solid var(--c-border);
            height: 100%;
            transition: var(--transition-base);
            position: relative;
            overflow: hidden;
        }
        .tip-card::before {
            content: "";
            position: absolute;
            top: 0;
            left: 0;
            width: 100%;
            height: 3px;
            background: linear-gradient(90deg, var(--c-primary), var(--c-accent));
            opacity: 0;
            transition: var(--transition-base);
        }
        .tip-card:hover::before {
            opacity: 1;
        }
        .tip-card:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow-md);
        }
        .tip-card .tip-icon {
            width: 48px;
            height: 48px;
            display: flex;
            align-items: center;
            justify-content: center;
            border-radius: 12px;
            font-size: 20px;
            margin-bottom: 16px;
            background: var(--c-primary-50);
            color: var(--c-primary);
        }
        .tip-card h4 {
            font-size: 16px;
            font-weight: 700;
            color: var(--c-dark);
            margin-bottom: 8px;
        }
        .tip-card p {
            font-size: 14px;
            color: var(--c-text-light);
            line-height: 1.7;
            margin-bottom: 0;
        }

        /* ===== FAQ ===== */
        .faq-item {
            background: var(--c-surface);
            border: 1px solid var(--c-border);
            border-radius: var(--radius-md);
            padding: 24px 28px;
            margin-bottom: 12px;
            transition: var(--transition-base);
        }
        .faq-item:hover {
            border-color: rgba(79, 70, 229, .25);
            box-shadow: var(--shadow-sm);
        }
        .faq-item .faq-q {
            display: flex;
            align-items: center;
            justify-content: space-between;
            cursor: pointer;
            font-size: 16px;
            font-weight: 700;
            color: var(--c-dark);
            margin-bottom: 0;
        }
        .faq-item .faq-q i {
            color: var(--c-primary);
            font-size: 14px;
            transition: var(--transition-base);
            flex-shrink: 0;
        }
        .faq-item:hover .faq-q i {
            transform: rotate(45deg);
        }
        .faq-item .faq-a {
            font-size: 15px;
            color: var(--c-text-light);
            line-height: 1.8;
            margin-top: 12px;
            padding-left: 20px;
            border-left: 2px solid var(--c-primary-50);
        }

        /* ===== CTA 区块 ===== */
        .cta-block {
            background: linear-gradient(135deg, #111827, #1e1b4b);
            border-radius: 24px;
            padding: 48px 56px;
            position: relative;
            overflow: hidden;
        }
        .cta-block::before {
            content: "";
            position: absolute;
            top: -40%;
            right: -10%;
            width: 400px;
            height: 400px;
            background: radial-gradient(circle, rgba(79, 70, 229, .3), transparent 60%);
            border-radius: 50%;
        }
        .cta-block::after {
            content: "";
            position: absolute;
            bottom: -50%;
            left: -5%;
            width: 300px;
            height: 300px;
            background: radial-gradient(circle, rgba(14, 165, 233, .2), transparent 60%);
            border-radius: 50%;
        }
        .cta-block .cta-inner {
            position: relative;
            z-index: 1;
        }
        .cta-block h3 {
            color: #fff;
            font-size: 30px;
            font-weight: 800;
            margin-bottom: 12px;
            letter-spacing: -0.3px;
        }
        .cta-block p {
            color: rgba(255, 255, 255, .7);
            font-size: 16px;
            max-width: 600px;
            margin-bottom: 28px;
        }
        .btn-custom-primary {
            background: linear-gradient(135deg, #4F46E5, #0EA5E9);
            color: #fff;
            border: none;
            padding: 12px 28px;
            border-radius: 10px;
            font-size: 15px;
            font-weight: 600;
            display: inline-flex;
            align-items: center;
            gap: 8px;
            transition: var(--transition-base);
            box-shadow: 0 4px 16px rgba(79, 70, 229, .3);
        }
        .btn-custom-primary:hover {
            transform: translateY(-2px);
            box-shadow: 0 8px 24px rgba(79, 70, 229, .4);
            color: #fff;
        }
        .btn-custom-primary:focus {
            outline: 3px solid rgba(79, 70, 229, .3);
            outline-offset: 2px;
        }
        .btn-custom-ghost {
            background: transparent;
            color: rgba(255, 255, 255, .9);
            border: 1px solid rgba(255, 255, 255, .3);
            padding: 12px 28px;
            border-radius: 10px;
            font-size: 15px;
            font-weight: 500;
            display: inline-flex;
            align-items: center;
            gap: 8px;
            transition: var(--transition-base);
        }
        .btn-custom-ghost:hover {
            background: rgba(255, 255, 255, .1);
            border-color: rgba(255, 255, 255, .5);
            color: #fff;
            transform: translateY(-2px);
        }

        /* ===== 页脚 ===== */
        .site-footer {
            background: var(--c-dark);
            color: rgba(255, 255, 255, .7);
            padding: 56px 0 28px;
            margin-left: 280px;
            border-top: 1px solid rgba(255, 255, 255, .05);
        }
        .site-footer .brand-logo {
            margin-bottom: 16px;
        }
        .footer-desc {
            font-size: 14px;
            line-height: 1.8;
            color: rgba(255, 255, 255, .55);
            max-width: 380px;
            margin-bottom: 0;
        }
        .footer-title {
            font-size: 14px;
            font-weight: 700;
            color: #fff;
            margin-bottom: 16px;
            letter-spacing: .5px;
        }
        .footer-links {
            display: flex;
            flex-direction: column;
            gap: 10px;
        }
        .footer-links a {
            color: rgba(255, 255, 255, .6);
            font-size: 14px;
            transition: var(--transition-base);
            display: inline-flex;
            align-items: center;
            gap: 8px;
        }
        .footer-links a:hover {
            color: #fff;
            padding-left: 4px;
        }
        .footer-links a i {
            font-size: 12px;
            color: var(--c-primary);
            opacity: .8;
        }
        .footer-divider {
            border-top: 1px solid rgba(255, 255, 255, .1);
            margin: 32px 0 20px;
        }
        .footer-bottom {
            display: flex;
            justify-content: space-between;
            align-items: center;
            font-size: 13px;
            color: rgba(255, 255, 255, .4);
            flex-wrap: wrap;
            gap: 8px;
        }
        .footer-domain {
            font-family: monospace;
            font-size: 12px;
            letter-spacing: .5px;
            background: rgba(255, 255, 255, .06);
            padding: 4px 12px;
            border-radius: 6px;
            border: 1px solid rgba(255, 255, 255, .08);
        }

        /* ===== 响应式 ===== */
        @media (max-width: 1199.98px) {
            .sub-menu-wrap {
                margin-left: 0 !important;
                margin-top: 26px;
            }
        }
        @media (max-width: 991.98px) {
            .sidebar {
                width: 240px;
                padding: 20px 14px;
            }
            .main-wrapper {
                margin-left: 240px;
            }
            .site-footer {
                margin-left: 240px;
            }
            .page-banner .banner-inner {
                padding: 28px 36px;
            }
            .banner-title {
                font-size: 34px;
            }
            .cta-block {
                padding: 36px 28px;
            }
            .section-title {
                font-size: 26px;
            }
        }
        @media (max-width: 767.98px) {
            body {
                padding-top: 60px;
            }
            .sidebar {
                width: 100%;
                height: auto;
                position: fixed;
                top: 0;
                bottom: auto;
                left: 0;
                padding: 10px 16px;
                flex-direction: row;
                justify-content: space-between;
                align-items: center;
                z-index: 1100;
                background: rgba(11, 17, 32, .95);
                backdrop-filter: blur(12px);
                border-bottom: 1px solid rgba(255, 255, 255, .08);
                border-right: none;
                overflow: visible;
            }
            .sidebar-brand {
                padding: 0;
                border-bottom: none;
                margin-bottom: 0;
            }
            .brand-logo {
                gap: 8px;
            }
            .brand-icon {
                width: 32px;
                height: 32px;
                font-size: 13px;
                border-radius: 8px;
            }
            .brand-name {
                font-size: 15px;
            }
            .brand-sub {
                font-size: 11px;
            }
            .sidebar-nav {
                position: fixed;
                top: 60px;
                left: 0;
                right: 0;
                background: var(--c-dark);
                padding: 16px;
                border-bottom: 1px solid rgba(255, 255, 255, .1);
                display: none;
            }
            .sidebar-nav.open {
                display: block;
            }
            .sidebar-nav-label {
                padding: 0 12px;
            }
            .sidebar-nav ul li a {
                padding: 12px 16px;
            }
            .sidebar-meta {
                display: none;
            }
            .navbar-toggler-custom {
                display: inline-flex !important;
                width: 40px;
                height: 40px;
                align-items: center;
                justify-content: center;
                background: rgba(255, 255, 255, .1);
                border: 1px solid rgba(255, 255, 255, .2);
                border-radius: 8px;
                color: #fff;
                font-size: 18px;
                cursor: pointer;
                transition: var(--transition-base);
            }
            .navbar-toggler-custom:hover {
                background: rgba(255, 255, 255, .2);
            }
            .main-wrapper {
                margin-left: 0;
                width: 100%;
            }
            .site-footer {
                margin-left: 0;
                width: 100%;
                padding: 40px 0 24px;
            }
            .page-banner {
                padding: 48px 0;
                border-radius: 0;
                margin-bottom: 32px;
            }
            .page-banner .banner-inner {
                padding: 20px 24px;
            }
            .banner-title {
                font-size: 28px;
            }
            .banner-desc {
                font-size: 15px;
            }
            .banner-stats {
                flex-wrap: wrap;
                gap: 20px;
            }
            .main-content {
                padding: 0 16px 32px;
            }
            .section-block {
                padding: 32px 0;
            }
            .section-title {
                font-size: 24px;
            }
            .guide-item {
                flex-direction: column;
                gap: 12px;
                padding: 20px;
            }
            .cta-block {
                padding: 28px 24px;
                border-radius: 16px;
            }
            .cta-block h3 {
                font-size: 24px;
            }
            .faq-item {
                padding: 20px;
            }
        }
        @media (max-width: 575.98px) {
            .main-content {
                padding: 0 12px 24px;
            }
            .page-banner .banner-inner {
                padding: 16px;
            }
            .banner-title {
                font-size: 24px;
            }
            .banner-stats .stat-num {
                font-size: 22px;
            }
            .section-header {
                margin-bottom: 24px;
            }
            .section-title {
                font-size: 20px;
            }
            .cta-block h3 {
                font-size: 20px;
            }
            .footer-bottom {
                flex-direction: column;
                text-align: center;
            }
        }

        /* ===== 移动端汉堡按钮 ===== */
        .navbar-toggler-custom {
            display: none;
        }

/* roulang page: article */
:root {
            --primary: #1668e3;
            --primary-600: #0e56c4;
            --primary-700: #0b3d8f;
            --accent: #06b6d4;
            --accent-2: #10b981;
            --bg: #f4f7fc;
            --surface: #ffffff;
            --text: #1f2937;
            --text-weak: #64748b;
            --border: #e2e8f0;
            --radius-sm: 8px;
            --radius: 16px;
            --radius-lg: 24px;
            --shadow-sm: 0 2px 8px rgba(15, 23, 42, .06);
            --shadow: 0 12px 32px rgba(15, 23, 42, .08);
            --shadow-lg: 0 20px 48px rgba(15, 23, 42, .12);
            --sidebar-width: 280px;
            --transition: all .25s ease;
        }

        * {
            box-sizing: border-box;
        }

        body {
            font-family: system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", "Noto Sans SC", "Microsoft YaHei", sans-serif;
            background: var(--bg);
            color: var(--text);
            line-height: 1.6;
            margin: 0;
            -webkit-font-smoothing: antialiased;
        }

        a {
            color: inherit;
            text-decoration: none;
        }

        img {
            max-width: 100%;
        }

        .site-wrapper {
            display: flex;
            align-items: stretch;
            min-height: 100vh;
        }

        .site-sidebar {
            width: var(--sidebar-width);
            flex: 0 0 var(--sidebar-width);
            position: fixed;
            top: 0;
            left: 0;
            bottom: 0;
            z-index: 1040;
            background: linear-gradient(180deg, #0e1a3a 0%, #0a1024 100%);
            padding: 30px 20px 20px;
            display: flex;
            flex-direction: column;
            box-shadow: 4px 0 24px rgba(2, 12, 27, .18);
        }

        .brand-logo {
            display: flex;
            align-items: center;
            gap: 12px;
        }

        .brand-icon {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 46px;
            height: 46px;
            border-radius: 14px;
            background: linear-gradient(135deg, var(--accent), var(--primary));
            color: #fff;
            font-weight: 800;
            font-size: 1.2rem;
            letter-spacing: .5px;
            box-shadow: 0 6px 18px rgba(6, 182, 212, .35);
            flex-shrink: 0;
        }

        .brand-name {
            font-weight: 700;
            font-size: 1.12rem;
            color: #fff;
            line-height: 1.25;
            white-space: nowrap;
        }

        .brand-sub {
            display: block;
            font-size: .75rem;
            font-weight: 400;
            color: rgba(255, 255, 255, .6);
            letter-spacing: 1px;
        }

        .sidebar-nav {
            margin-top: 38px;
        }

        .sidebar-nav-label {
            font-size: .75rem;
            color: rgba(255, 255, 255, .45);
            letter-spacing: .16em;
            text-transform: uppercase;
            padding-left: 16px;
            margin-bottom: 12px;
        }

        .sidebar-nav ul {
            list-style: none;
            padding: 0;
            margin: 0;
            display: flex;
            flex-direction: column;
            gap: 6px;
        }

        .sidebar-nav a {
            display: flex;
            align-items: center;
            gap: 12px;
            padding: 12px 16px;
            border-radius: 12px;
            color: rgba(255, 255, 255, .82);
            font-weight: 500;
            transition: var(--transition);
        }

        .sidebar-nav a i {
            width: 20px;
            text-align: center;
            font-size: 1rem;
        }

        .sidebar-nav a:hover {
            background: rgba(255, 255, 255, .08);
            color: #fff;
            transform: translateX(4px);
        }

        .sidebar-nav a.active {
            background: rgba(6, 182, 212, .18);
            color: #fff;
            border: 1px solid rgba(6, 182, 212, .25);
        }

        .sidebar-footer {
            margin-top: auto;
            padding: 16px;
            border-radius: 16px;
            background: rgba(255, 255, 255, .06);
            border: 1px solid rgba(255, 255, 255, .08);
        }

        .sidebar-safe {
            color: #fff;
            font-weight: 600;
            margin-bottom: 4px;
        }

        .sidebar-footer p {
            margin: 0;
            font-size: .8rem;
            color: rgba(255, 255, 255, .55);
        }

        .site-main {
            flex: 1;
            min-width: 0;
            margin-left: var(--sidebar-width);
            display: flex;
            flex-direction: column;
        }

        .page-banner {
            position: relative;
            padding: 62px 0;
            background-size: cover;
            background-position: center;
            color: #fff;
            isolation: isolate;
        }

        .page-banner::before {
            content: "";
            position: absolute;
            inset: 0;
            background: rgba(10, 20, 45, .74);
            z-index: -1;
        }

        .banner-breadcrumb .breadcrumb {
            margin-bottom: 16px;
            --bs-breadcrumb-divider-color: rgba(255, 255, 255, .4);
        }

        .banner-breadcrumb .breadcrumb-item,
        .banner-breadcrumb .breadcrumb-item a {
            color: rgba(255, 255, 255, .75);
            font-size: .9rem;
        }

        .banner-breadcrumb .breadcrumb-item.active {
            color: rgba(255, 255, 255, .92);
        }

        .banner-title {
            font-size: 2.2rem;
            font-weight: 800;
            margin-bottom: 8px;
            color: #fff;
        }

        .banner-subtitle {
            color: rgba(255, 255, 255, .78);
            font-size: 1.05rem;
            margin: 0;
        }

        .article-card {
            background: var(--surface);
            border-radius: var(--radius-lg);
            box-shadow: var(--shadow);
            padding: 38px;
            border: 1px solid rgba(226, 232, 240, .6);
        }

        .article-header {
            margin-bottom: 22px;
        }

        .article-badge {
            display: inline-block;
            background: rgba(22, 104, 227, .1);
            color: var(--primary);
            font-weight: 600;
            font-size: .8rem;
            padding: 5px 14px;
            border-radius: 999px;
            margin-bottom: 14px;
        }

        .article-title {
            font-size: 1.9rem;
            font-weight: 800;
            color: var(--text);
            line-height: 1.35;
            margin: 0;
        }

        .article-meta {
            display: flex;
            flex-wrap: wrap;
            gap: 16px;
            color: var(--text-weak);
            font-size: .88rem;
            margin-top: 14px;
        }

        .article-meta i {
            margin-right: 5px;
            color: var(--primary);
        }

        .article-cover {
            width: 100%;
            border-radius: var(--radius);
            margin: 24px 0;
            object-fit: cover;
            max-height: 420px;
            box-shadow: var(--shadow-sm);
        }

        .article-content {
            color: #334155;
            font-size: 1.05rem;
            line-height: 1.9;
        }

        .article-content p {
            margin-bottom: 1.5rem;
        }

        .article-content h2,
        .article-content h3 {
            color: var(--text);
            font-weight: 700;
            margin-top: 2rem;
            margin-bottom: 1rem;
        }

        .article-content img {
            max-width: 100%;
            border-radius: 12px;
        }

        .article-content a {
            color: var(--primary);
        }

        .article-content ul,
        .article-content ol {
            padding-left: 1.25rem;
            margin-bottom: 1.5rem;
        }

        .article-content blockquote {
            background: #f8fafc;
            border-left: 4px solid var(--accent);
            padding: 16px 20px;
            border-radius: 0 12px 12px 0;
            color: var(--text-weak);
            margin: 1.5rem 0;
        }

        .article-guide {
            background: #f8fafc;
            border: 1px dashed var(--border);
            border-radius: var(--radius);
            padding: 18px 24px;
            font-size: .95rem;
            color: var(--text-weak);
        }

        .info-side-card {
            background: var(--surface);
            border-radius: var(--radius);
            box-shadow: var(--shadow-sm);
            border: 1px solid var(--border);
            padding: 24px;
        }

        .info-side-card h3 {
            font-size: 1.05rem;
            font-weight: 700;
            margin-bottom: 16px;
            color: var(--text);
        }

        .info-side-card ul {
            list-style: none;
            padding: 0;
            margin: 0 0 18px;
        }

        .info-side-card li {
            font-size: .92rem;
            color: var(--text-weak);
            margin-bottom: 10px;
        }

        .info-side-card li i {
            color: var(--accent);
            margin-right: 8px;
        }

        .latest-list {
            list-style: none;
            padding: 0;
            margin: 0;
        }

        .latest-list li {
            border-bottom: 1px dashed var(--border);
            padding: 10px 0;
        }

        .latest-list li:last-child {
            border-bottom: 0;
        }

        .latest-list a {
            color: var(--text);
            font-size: .9rem;
            transition: var(--transition);
        }

        .latest-list a:hover {
            color: var(--primary);
            padding-left: 4px;
        }

        .text-weak-muted {
            color: var(--text-weak);
            font-size: .88rem;
        }

        .btn-brand {
            --bs-btn-color: #fff;
            --bs-btn-bg: var(--primary);
            --bs-btn-border-color: var(--primary);
            --bs-btn-hover-color: #fff;
            --bs-btn-hover-bg: var(--primary-600);
            --bs-btn-hover-border-color: var(--primary-600);
            --bs-btn-active-color: #fff;
            --bs-btn-active-bg: var(--primary-700);
            --bs-btn-active-border-color: var(--primary-700);
            border-radius: 12px;
            padding: 12px 24px;
            font-weight: 600;
            transition: var(--transition);
            box-shadow: 0 8px 20px rgba(22, 104, 227, .2);
        }

        .btn-brand:hover {
            transform: translateY(-2px);
            box-shadow: 0 12px 28px rgba(22, 104, 227, .28);
        }

        .btn-outline-brand {
            --bs-btn-color: var(--primary);
            --bs-btn-border-color: var(--primary);
            --bs-btn-hover-color: #fff;
            --bs-btn-hover-bg: var(--primary);
            --bs-btn-hover-border-color: var(--primary);
            --bs-btn-active-color: #fff;
            --bs-btn-active-bg: var(--primary);
            --bs-btn-active-border-color: var(--primary);
            border-radius: 12px;
            padding: 10px 20px;
            font-weight: 600;
            transition: var(--transition);
        }

        .not-found-card {
            max-width: 640px;
            margin: 48px auto;
            text-align: center;
            background: var(--surface);
            border-radius: var(--radius-lg);
            padding: 56px 32px;
            box-shadow: var(--shadow);
            border: 1px solid var(--border);
        }

        .not-found-icon {
            font-size: 3.4rem;
            color: var(--accent);
            margin-bottom: 16px;
        }

        .not-found-card h2 {
            font-size: 1.5rem;
            font-weight: 700;
            color: var(--text);
            margin-bottom: 12px;
        }

        .not-found-card p {
            color: var(--text-weak);
            margin-bottom: 8px;
        }

        .article-faq {
            background: var(--surface);
            border-radius: var(--radius-lg);
            box-shadow: var(--shadow-sm);
            border: 1px solid var(--border);
        }

        .section-title {
            font-size: 1.7rem;
            font-weight: 800;
            color: var(--text);
            margin-bottom: 8px;
            position: relative;
            padding-bottom: 12px;
        }

        .section-title::after {
            content: "";
            position: absolute;
            left: 0;
            bottom: 0;
            width: 48px;
            height: 4px;
            border-radius: 2px;
            background: linear-gradient(90deg, var(--primary), var(--accent));
        }

        .section-subtitle {
            color: var(--text-weak);
            font-size: .95rem;
            margin-bottom: 32px;
        }

        .faq-item {
            border: 1px solid var(--border);
            border-radius: var(--radius);
            padding: 20px 24px;
            margin-bottom: 12px;
            background: #fff;
            transition: var(--transition);
        }

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

        .faq-question {
            font-weight: 700;
            color: var(--text);
            margin-bottom: 8px;
            display: flex;
            gap: 10px;
        }

        .faq-question i {
            color: var(--accent);
        }

        .faq-answer {
            color: var(--text-weak);
            font-size: .95rem;
            margin: 0;
            padding-left: 28px;
        }

        .cta-banner {
            background: linear-gradient(135deg, #0e1b3d, #103a6b);
            border-radius: var(--radius-lg);
            padding: 48px 40px;
            color: #fff;
            box-shadow: var(--shadow-lg);
        }

        .cta-banner h2 {
            font-weight: 800;
            margin-bottom: 10px;
            color: #fff;
        }

        .cta-banner p {
            color: rgba(255, 255, 255, .75);
        }

        .site-footer {
            background: #0b1120;
            color: rgba(255, 255, 255, .7);
            padding: 56px 0 24px;
            margin-top: auto;
        }

        .footer-brand .brand-name {
            color: #fff;
        }

        .footer-desc {
            color: rgba(255, 255, 255, .55);
            font-size: .92rem;
            line-height: 1.8;
            max-width: 380px;
            margin: 16px 0 0;
        }

        .footer-title {
            color: #fff;
            font-weight: 600;
            margin-bottom: 16px;
        }

        .footer-links {
            display: flex;
            flex-direction: column;
            gap: 10px;
        }

        .footer-links a {
            color: rgba(255, 255, 255, .6);
            transition: var(--transition);
        }

        .footer-links a:hover {
            color: var(--accent);
            padding-left: 4px;
        }

        .footer-divider {
            border-top: 1px solid rgba(255, 255, 255, .1);
            margin: 36px 0 20px;
        }

        .footer-bottom {
            display: flex;
            justify-content: space-between;
            flex-wrap: wrap;
            gap: 10px;
            color: rgba(255, 255, 255, .4);
            font-size: .82rem;
        }

        .footer-domain {
            letter-spacing: .5px;
        }

        @media (max-width: 991.98px) {
            .site-wrapper {
                flex-direction: column;
            }

            .site-sidebar {
                position: static;
                width: 100%;
                flex: 0 0 auto;
                flex-direction: row;
                align-items: center;
                gap: 16px;
                padding: 14px 20px;
                box-shadow: 0 4px 16px rgba(2, 12, 27, .08);
            }

            .sidebar-nav {
                margin-top: 0;
                flex: 1;
            }

            .sidebar-nav-label {
                display: none;
            }

            .sidebar-nav ul {
                flex-direction: row;
                gap: 10px;
                overflow-x: auto;
                scrollbar-width: none;
            }

            .sidebar-nav ul::-webkit-scrollbar {
                display: none;
            }

            .sidebar-nav a {
                padding: 9px 14px;
                white-space: nowrap;
            }

            .sidebar-nav a:hover {
                transform: none;
            }

            .sidebar-footer {
                display: none;
            }

            .site-main {
                margin-left: 0;
            }

            .page-banner {
                padding: 42px 0;
            }

            .article-title {
                font-size: 1.55rem;
            }

            .article-card {
                padding: 26px;
            }
        }

        @media (max-width: 767.98px) {
            .banner-title {
                font-size: 1.6rem;
            }

            .article-card {
                padding: 18px;
            }

            .article-meta {
                gap: 10px;
            }

            .info-side-card {
                margin-top: 16px;
            }

            .cta-banner {
                padding: 32px 24px;
            }

            .footer-bottom {
                justify-content: center;
                text-align: center;
            }
        }

        @media (max-width: 575.98px) {
            .site-sidebar {
                flex-wrap: wrap;
                gap: 10px;
            }

            .sidebar-nav {
                min-width: 0;
                flex-basis: 100%;
            }

            .page-banner {
                padding: 30px 0;
            }

            .banner-title {
                font-size: 1.35rem;
            }

            .article-content {
                font-size: 1rem;
            }
        }