/* roulang page: index */
/* ===== 设计变量 ===== */
        :root {
            --primary: #1e3a5f;
            --primary-light: #2d6da8;
            --primary-dark: #0f2440;
            --accent: #c9a84c;
            --accent-light: #dfc26e;
            --accent-dark: #a88a2e;
            --bg-body: #f5f7fa;
            --bg-white: #ffffff;
            --bg-light: #f0f2f5;
            --bg-dark: #1a1e2c;
            --text-primary: #1e293b;
            --text-secondary: #475569;
            --text-muted: #94a3b8;
            --text-white: #ffffff;
            --border-color: #e2e8f0;
            --radius-sm: 6px;
            --radius-md: 12px;
            --radius-lg: 20px;
            --radius-xl: 28px;
            --shadow-sm: 0 1px 3px rgba(0,0,0,0.06), 0 1px 2px rgba(0,0,0,0.04);
            --shadow-md: 0 4px 16px rgba(0,0,0,0.08), 0 2px 4px rgba(0,0,0,0.04);
            --shadow-lg: 0 12px 40px rgba(0,0,0,0.10), 0 4px 12px rgba(0,0,0,0.06);
            --shadow-xl: 0 24px 60px rgba(0,0,0,0.14);
            --transition: all 0.3s cubic-bezier(0.4,0,0.2,1);
            --font-sans: 'Inter', system-ui, -apple-system, 'Segoe UI', Roboto, 'Helvetica Neue', sans-serif;
        }

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

        /* ===== 容器 ===== */
        .container { max-width: 1200px; padding-left: 20px; padding-right: 20px; }
        .section { padding: 80px 0; }
        .section-sm { padding: 56px 0; }
        .section-title {
            font-size: 2.25rem;
            font-weight: 700;
            color: var(--text-primary);
            line-height: 1.25;
            margin-bottom: 0.5rem;
            letter-spacing: -0.02em;
        }
        .section-subtitle {
            font-size: 1.1rem;
            color: var(--text-secondary);
            max-width: 640px;
            margin: 0 auto 48px auto;
            text-align: center;
        }
        .section-header { text-align: center; margin-bottom: 48px; }
        /* 分隔装饰 */
        .section-divider {
            width: 60px;
            height: 4px;
            background: linear-gradient(90deg, var(--accent), var(--accent-light));
            border-radius: 4px;
            margin: 12px auto 16px auto;
        }

        /* ===== 导航 ===== */
        .site-header {
            background: var(--bg-white);
            box-shadow: 0 1px 4px rgba(0,0,0,0.04);
            position: sticky;
            top: 0;
            z-index: 1050;
            border-bottom: 1px solid var(--border-color);
        }
        /* 品牌行 */
        .brand-bar {
            background: var(--bg-white);
            padding: 12px 0;
            border-bottom: 1px solid var(--border-color);
        }
        .brand-bar .logo {
            font-size: 1.5rem;
            font-weight: 700;
            color: var(--primary);
            letter-spacing: -0.02em;
            display: flex;
            align-items: center;
            gap: 10px;
        }
        .brand-bar .logo i {
            color: var(--accent);
            font-size: 1.75rem;
        }
        .brand-bar .logo:hover { color: var(--primary); }
        .brand-bar .brand-cta {
            background: var(--accent);
            color: var(--primary-dark);
            padding: 6px 20px;
            border-radius: 50px;
            font-weight: 600;
            font-size: 0.9rem;
            transition: var(--transition);
            border: none;
        }
        .brand-bar .brand-cta:hover {
            background: var(--accent-light);
            color: var(--primary-dark);
            transform: translateY(-1px);
            box-shadow: var(--shadow-sm);
        }
        .navbar-toggler {
            border: none;
            padding: 6px 10px;
            font-size: 1.3rem;
            color: var(--primary);
            background: transparent;
            border-radius: var(--radius-sm);
        }
        .navbar-toggler:focus {
            box-shadow: 0 0 0 3px rgba(30,58,95,0.15);
            outline: none;
        }
        /* 频道行 */
        .channel-bar {
            background: var(--bg-white);
        }
        .channel-bar .navbar-nav {
            display: flex;
            flex-direction: row;
            gap: 4px;
            padding: 0;
            margin: 0;
        }
        .channel-bar .nav-link {
            padding: 12px 24px;
            font-weight: 500;
            color: var(--text-secondary);
            font-size: 1rem;
            border-radius: var(--radius-sm) var(--radius-sm) 0 0;
            transition: var(--transition);
            position: relative;
            white-space: nowrap;
        }
        .channel-bar .nav-link::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 50%;
            transform: translateX(-50%);
            width: 0;
            height: 3px;
            background: var(--accent);
            border-radius: 3px 3px 0 0;
            transition: var(--transition);
        }
        .channel-bar .nav-link:hover {
            color: var(--primary);
            background: var(--bg-light);
        }
        .channel-bar .nav-link:hover::after { width: 60%; }
        .channel-bar .nav-link.active {
            color: var(--primary);
            font-weight: 600;
            background: var(--bg-body);
        }
        .channel-bar .nav-link.active::after { width: 70%; }
        .channel-bar .collapse { flex-grow: 0; }

        /* 移动端导航 */
        @media (max-width: 767px) {
            .brand-bar { padding: 10px 0; }
            .brand-bar .logo { font-size: 1.25rem; }
            .channel-bar .navbar-nav {
                flex-direction: column;
                gap: 0;
                padding: 8px 0;
            }
            .channel-bar .nav-link {
                padding: 12px 20px;
                border-radius: var(--radius-sm);
            }
            .channel-bar .nav-link::after { display: none; }
            .channel-bar .nav-link.active {
                background: var(--bg-light);
                border-left: 3px solid var(--accent);
            }
            .section { padding: 48px 0; }
            .section-title { font-size: 1.75rem; }
        }

        /* ===== Hero ===== */
        .hero {
            position: relative;
            min-height: 620px;
            display: flex;
            align-items: center;
            background: var(--primary-dark);
            overflow: hidden;
        }
        .hero-bg {
            position: absolute;
            inset: 0;
            background: url('/assets/images/backpic/back-2.webp') center center / cover no-repeat;
            opacity: 0.35;
            transform: scale(1.02);
            transition: transform 8s ease;
        }
        .hero:hover .hero-bg { transform: scale(1.06); }
        .hero-overlay {
            position: absolute;
            inset: 0;
            background: linear-gradient(135deg, rgba(15,36,64,0.92) 0%, rgba(30,58,95,0.78) 50%, rgba(15,36,64,0.88) 100%);
        }
        .hero-content {
            position: relative;
            z-index: 2;
            padding: 100px 0 80px;
            text-align: center;
        }
        .hero-badge {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            background: rgba(201,168,76,0.18);
            color: var(--accent-light);
            padding: 6px 20px;
            border-radius: 50px;
            font-size: 0.85rem;
            font-weight: 500;
            border: 1px solid rgba(201,168,76,0.25);
            margin-bottom: 24px;
            backdrop-filter: blur(4px);
        }
        .hero h1 {
            font-size: 3.2rem;
            font-weight: 800;
            color: var(--text-white);
            line-height: 1.15;
            letter-spacing: -0.03em;
            margin-bottom: 20px;
            text-shadow: 0 2px 20px rgba(0,0,0,0.25);
        }
        .hero h1 span { color: var(--accent); }
        .hero p {
            font-size: 1.2rem;
            color: rgba(255,255,255,0.85);
            max-width: 680px;
            margin: 0 auto 36px auto;
            line-height: 1.7;
        }
        .hero-actions {
            display: flex;
            flex-wrap: wrap;
            gap: 16px;
            justify-content: center;
        }
        .hero .btn-primary {
            background: var(--accent);
            border: none;
            color: var(--primary-dark);
            padding: 14px 40px;
            font-weight: 700;
            font-size: 1.05rem;
            border-radius: 50px;
            transition: var(--transition);
            box-shadow: 0 4px 20px rgba(201,168,76,0.35);
        }
        .hero .btn-primary:hover {
            background: var(--accent-light);
            transform: translateY(-3px);
            box-shadow: 0 8px 32px rgba(201,168,76,0.45);
        }
        .hero .btn-outline-light {
            border: 2px solid rgba(255,255,255,0.4);
            color: var(--text-white);
            padding: 14px 36px;
            font-weight: 600;
            border-radius: 50px;
            backdrop-filter: blur(4px);
            transition: var(--transition);
        }
        .hero .btn-outline-light:hover {
            background: rgba(255,255,255,0.12);
            border-color: rgba(255,255,255,0.7);
            transform: translateY(-3px);
        }
        .hero-stats {
            display: flex;
            flex-wrap: wrap;
            gap: 40px;
            justify-content: center;
            margin-top: 48px;
            padding-top: 36px;
            border-top: 1px solid rgba(255,255,255,0.12);
        }
        .hero-stat-item { text-align: center; }
        .hero-stat-item .number {
            font-size: 2rem;
            font-weight: 800;
            color: var(--accent);
            line-height: 1.2;
        }
        .hero-stat-item .label {
            font-size: 0.9rem;
            color: rgba(255,255,255,0.65);
            margin-top: 4px;
        }

        @media (max-width: 767px) {
            .hero { min-height: 480px; }
            .hero h1 { font-size: 2rem; }
            .hero p { font-size: 1rem; }
            .hero-content { padding: 60px 0 48px; }
            .hero-stats { gap: 24px; }
            .hero-stat-item .number { font-size: 1.6rem; }
        }
        @media (max-width: 520px) {
            .hero h1 { font-size: 1.7rem; }
            .hero .btn-primary, .hero .btn-outline-light { padding: 12px 28px; font-size: 0.95rem; }
            .hero-stats { flex-direction: column; gap: 16px; }
        }

        /* ===== 核心优势 ===== */
        .features-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 24px; }
        .feature-card {
            background: var(--bg-white);
            border-radius: var(--radius-md);
            padding: 36px 28px;
            text-align: center;
            border: 1px solid var(--border-color);
            transition: var(--transition);
            box-shadow: var(--shadow-sm);
        }
        .feature-card:hover {
            transform: translateY(-6px);
            box-shadow: var(--shadow-lg);
            border-color: transparent;
        }
        .feature-icon {
            width: 64px;
            height: 64px;
            background: linear-gradient(135deg, var(--primary-light), var(--primary));
            border-radius: var(--radius-md);
            display: flex;
            align-items: center;
            justify-content: center;
            margin: 0 auto 20px auto;
            color: #fff;
            font-size: 1.6rem;
            transition: var(--transition);
        }
        .feature-card:hover .feature-icon { transform: scale(1.05); background: linear-gradient(135deg, var(--accent), var(--accent-dark)); }
        .feature-card h3 { font-size: 1.2rem; font-weight: 700; color: var(--text-primary); margin-bottom: 10px; }
        .feature-card p { font-size: 0.95rem; color: var(--text-secondary); line-height: 1.6; margin: 0; }

        @media (max-width: 991px) { .features-grid { grid-template-columns: repeat(2, 1fr); } }
        @media (max-width: 520px) { .features-grid { grid-template-columns: 1fr; } }

        /* ===== 平台服务 ===== */
        .service-section { background: var(--bg-white); }
        .service-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 48px; align-items: center; }
        .service-image {
            border-radius: var(--radius-lg);
            overflow: hidden;
            box-shadow: var(--shadow-lg);
            position: relative;
        }
        .service-image img { width: 100%; height: auto; transition: transform 0.6s ease; }
        .service-image:hover img { transform: scale(1.03); }
        .service-image .img-badge {
            position: absolute;
            top: 16px;
            left: 16px;
            background: var(--accent);
            color: var(--primary-dark);
            padding: 4px 16px;
            border-radius: 50px;
            font-size: 0.8rem;
            font-weight: 600;
        }
        .service-info h2 { font-size: 2rem; font-weight: 700; margin-bottom: 16px; line-height: 1.25; }
        .service-info p { color: var(--text-secondary); font-size: 1.05rem; line-height: 1.7; margin-bottom: 24px; }
        .service-list { display: flex; flex-direction: column; gap: 14px; }
        .service-list-item { display: flex; align-items: flex-start; gap: 14px; }
        .service-list-item i { color: var(--accent); font-size: 1.1rem; margin-top: 4px; flex-shrink: 0; }
        .service-list-item span { color: var(--text-primary); font-weight: 500; }

        @media (max-width: 991px) {
            .service-grid { grid-template-columns: 1fr; gap: 32px; }
            .service-info h2 { font-size: 1.6rem; }
        }

        /* ===== 最新资讯 CMS 列表 ===== */
        .news-section { background: var(--bg-light); }
        .news-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
        .news-card {
            background: var(--bg-white);
            border-radius: var(--radius-md);
            overflow: hidden;
            border: 1px solid var(--border-color);
            transition: var(--transition);
            box-shadow: var(--shadow-sm);
            display: flex;
            flex-direction: column;
        }
        .news-card:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow-md);
            border-color: transparent;
        }
        .news-card .card-img {
            height: 180px;
            background: var(--primary-light);
            position: relative;
            overflow: hidden;
        }
        .news-card .card-img img { width: 100%; height: 100%; object-fit: cover; transition: transform 0.5s ease; }
        .news-card:hover .card-img img { transform: scale(1.05); }
        .news-card .card-img .cat-tag {
            position: absolute;
            top: 12px;
            left: 12px;
            background: var(--accent);
            color: var(--primary-dark);
            padding: 2px 14px;
            border-radius: 50px;
            font-size: 0.75rem;
            font-weight: 600;
        }
        .news-card .card-body { padding: 20px 22px 24px; flex: 1; display: flex; flex-direction: column; }
        .news-card .card-body .date {
            font-size: 0.8rem;
            color: var(--text-muted);
            margin-bottom: 8px;
            display: flex;
            align-items: center;
            gap: 6px;
        }
        .news-card .card-body h3 { font-size: 1.05rem; font-weight: 700; color: var(--text-primary); margin-bottom: 10px; line-height: 1.4; }
        .news-card .card-body h3 a { color: inherit; }
        .news-card .card-body h3 a:hover { color: var(--primary-light); }
        .news-card .card-body p {
            font-size: 0.9rem;
            color: var(--text-secondary);
            line-height: 1.6;
            margin-bottom: 16px;
            flex: 1;
        }
        .news-card .card-body .read-more {
            font-size: 0.85rem;
            font-weight: 600;
            color: var(--primary-light);
            display: inline-flex;
            align-items: center;
            gap: 6px;
            align-self: flex-start;
        }
        .news-card .card-body .read-more:hover { color: var(--primary); gap: 10px; }
        .news-empty {
            grid-column: 1 / -1;
            text-align: center;
            padding: 48px 20px;
            background: var(--bg-white);
            border-radius: var(--radius-md);
            color: var(--text-muted);
            font-size: 1rem;
            border: 1px dashed var(--border-color);
        }

        @media (max-width: 991px) { .news-grid { grid-template-columns: repeat(2, 1fr); } }
        @media (max-width: 520px) { .news-grid { grid-template-columns: 1fr; } }

        /* ===== 使用流程 ===== */
        .steps-section { background: var(--bg-white); }
        .steps-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 24px; position: relative; }
        .steps-grid::before {
            content: '';
            position: absolute;
            top: 40px;
            left: 12%;
            right: 12%;
            height: 2px;
            background: linear-gradient(90deg, var(--accent), var(--primary-light), var(--accent));
            opacity: 0.25;
            z-index: 0;
        }
        .step-card {
            text-align: center;
            position: relative;
            z-index: 1;
            background: var(--bg-white);
            padding: 24px 16px;
            border-radius: var(--radius-md);
            transition: var(--transition);
        }
        .step-card:hover { transform: translateY(-4px); }
        .step-number {
            width: 48px;
            height: 48px;
            background: linear-gradient(135deg, var(--primary), var(--primary-light));
            color: #fff;
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            font-weight: 800;
            font-size: 1.2rem;
            margin: 0 auto 16px auto;
            box-shadow: 0 4px 14px rgba(30,58,95,0.25);
            transition: var(--transition);
        }
        .step-card:hover .step-number { background: linear-gradient(135deg, var(--accent), var(--accent-dark)); box-shadow: 0 4px 20px rgba(201,168,76,0.35); }
        .step-card h4 { font-size: 1.05rem; font-weight: 700; color: var(--text-primary); margin-bottom: 8px; }
        .step-card p { font-size: 0.9rem; color: var(--text-secondary); margin: 0; line-height: 1.6; }

        @media (max-width: 991px) {
            .steps-grid { grid-template-columns: repeat(2, 1fr); }
            .steps-grid::before { display: none; }
        }
        @media (max-width: 520px) { .steps-grid { grid-template-columns: 1fr; } }

        /* ===== 信任数据 ===== */
        .trust-section {
            background: var(--primary-dark);
            position: relative;
            overflow: hidden;
        }
        .trust-section::before {
            content: '';
            position: absolute;
            inset: 0;
            background: url('/assets/images/backpic/back-1.png') center center / cover no-repeat;
            opacity: 0.08;
        }
        .trust-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 32px; position: relative; z-index: 1; }
        .trust-item { text-align: center; padding: 24px 16px; }
        .trust-item .icon { font-size: 2.2rem; color: var(--accent); margin-bottom: 12px; }
        .trust-item .number { font-size: 2.6rem; font-weight: 800; color: var(--text-white); line-height: 1.1; }
        .trust-item .label { font-size: 0.95rem; color: rgba(255,255,255,0.65); margin-top: 6px; }

        @media (max-width: 767px) {
            .trust-grid { grid-template-columns: repeat(2, 1fr); gap: 20px; }
            .trust-item .number { font-size: 2rem; }
        }
        @media (max-width: 520px) { .trust-grid { grid-template-columns: 1fr; gap: 16px; } }

        /* ===== FAQ ===== */
        .faq-section { background: var(--bg-light); }
        .faq-list { max-width: 800px; margin: 0 auto; display: flex; flex-direction: column; gap: 12px; }
        .faq-item {
            background: var(--bg-white);
            border-radius: var(--radius-md);
            border: 1px solid var(--border-color);
            overflow: hidden;
            transition: var(--transition);
        }
        .faq-item:hover { border-color: transparent; box-shadow: var(--shadow-sm); }
        .faq-question {
            padding: 18px 24px;
            display: flex;
            justify-content: space-between;
            align-items: center;
            cursor: pointer;
            font-weight: 600;
            color: var(--text-primary);
            font-size: 1rem;
            gap: 16px;
            background: transparent;
            border: none;
            width: 100%;
            text-align: left;
            transition: var(--transition);
        }
        .faq-question:hover { color: var(--primary-light); }
        .faq-question i { color: var(--accent); font-size: 1.1rem; transition: var(--transition); flex-shrink: 0; }
        .faq-item.active .faq-question i { transform: rotate(180deg); }
        .faq-answer {
            padding: 0 24px 18px 24px;
            color: var(--text-secondary);
            font-size: 0.95rem;
            line-height: 1.7;
            display: none;
        }
        .faq-item.active .faq-answer { display: block; }

        /* ===== CTA ===== */
        .cta-section {
            background: linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 100%);
            padding: 80px 0;
            text-align: center;
            position: relative;
            overflow: hidden;
        }
        .cta-section::before {
            content: '';
            position: absolute;
            inset: 0;
            background: url('/assets/images/backpic/back-3.webp') center center / cover no-repeat;
            opacity: 0.06;
        }
        .cta-content { position: relative; z-index: 1; }
        .cta-content h2 { font-size: 2.4rem; font-weight: 800; color: var(--text-white); margin-bottom: 16px; }
        .cta-content p { font-size: 1.1rem; color: rgba(255,255,255,0.8); max-width: 560px; margin: 0 auto 32px auto; }
        .cta-content .btn-cta {
            background: var(--accent);
            border: none;
            color: var(--primary-dark);
            padding: 16px 48px;
            font-weight: 700;
            font-size: 1.1rem;
            border-radius: 50px;
            transition: var(--transition);
            box-shadow: 0 4px 24px rgba(201,168,76,0.4);
        }
        .cta-content .btn-cta:hover {
            background: var(--accent-light);
            transform: translateY(-3px);
            box-shadow: 0 8px 36px rgba(201,168,76,0.5);
        }

        @media (max-width: 767px) {
            .cta-content h2 { font-size: 1.8rem; }
            .cta-content p { font-size: 1rem; }
        }

        /* ===== 页脚 ===== */
        .site-footer {
            background: var(--bg-dark);
            color: rgba(255,255,255,0.7);
            padding: 56px 0 0;
        }
        .footer-grid { display: grid; grid-template-columns: 2fr 1fr 1fr 1fr; gap: 40px; }
        .footer-brand .logo { font-size: 1.4rem; font-weight: 700; color: var(--text-white); margin-bottom: 12px; display: flex; align-items: center; gap: 10px; }
        .footer-brand .logo i { color: var(--accent); }
        .footer-brand p { font-size: 0.9rem; line-height: 1.7; max-width: 320px; }
        .footer-col h5 { font-size: 1rem; font-weight: 700; color: var(--text-white); margin-bottom: 16px; }
        .footer-col ul li { margin-bottom: 8px; }
        .footer-col ul li a { color: rgba(255,255,255,0.6); font-size: 0.9rem; transition: var(--transition); }
        .footer-col ul li a:hover { color: var(--accent); padding-left: 4px; }
        .footer-bottom {
            margin-top: 40px;
            padding: 20px 0;
            border-top: 1px solid rgba(255,255,255,0.08);
            text-align: center;
            font-size: 0.85rem;
            color: rgba(255,255,255,0.4);
        }
        .footer-bottom a { color: rgba(255,255,255,0.5); }
        .footer-bottom a:hover { color: var(--accent); }

        @media (max-width: 991px) {
            .footer-grid { grid-template-columns: 1fr 1fr; gap: 32px; }
        }
        @media (max-width: 520px) {
            .footer-grid { grid-template-columns: 1fr; gap: 24px; }
        }

        /* ===== 通用工具 ===== */
        .text-accent { color: var(--accent); }
        .bg-accent { background: var(--accent); }
        .rounded-xl { border-radius: var(--radius-xl); }
        .shadow-hover { transition: var(--transition); }
        .shadow-hover:hover { box-shadow: var(--shadow-lg); transform: translateY(-4px); }

        /* ===== 响应式微调 ===== */
        @media (max-width: 576px) {
            .container { padding-left: 16px; padding-right: 16px; }
            .section { padding: 40px 0; }
            .section-title { font-size: 1.5rem; }
            .section-subtitle { font-size: 0.95rem; margin-bottom: 32px; }
            .brand-bar .logo { font-size: 1.1rem; }
            .brand-bar .brand-cta { padding: 4px 14px; font-size: 0.8rem; }
        }

        /* ===== 按钮通用 ===== */
        .btn { border-radius: 50px; font-weight: 600; padding: 10px 28px; transition: var(--transition); }
        .btn-primary-custom {
            background: var(--primary);
            border: none;
            color: #fff;
        }
        .btn-primary-custom:hover { background: var(--primary-light); transform: translateY(-2px); box-shadow: var(--shadow-md); }

        /* ===== 滚动动画 ===== */
        .fade-up { opacity: 0; transform: translateY(30px); transition: opacity 0.6s ease, transform 0.6s ease; }
        .fade-up.visible { opacity: 1; transform: translateY(0); }

/* roulang page: category1 */
/* ===== 设计变量 ===== */
        :root {
            --primary: #0d6efd;
            --primary-dark: #0a58ca;
            --primary-light: #6ea8fe;
            --accent: #f97316;
            --accent-dark: #ea580c;
            --bg-body: #f8fafc;
            --bg-card: #ffffff;
            --bg-dark: #0b1a33;
            --bg-section-alt: #f1f5f9;
            --text-primary: #0f172a;
            --text-secondary: #475569;
            --text-muted: #94a3b8;
            --text-light: #f1f5f9;
            --border-color: #e2e8f0;
            --radius: 1rem;
            --radius-sm: 0.5rem;
            --radius-lg: 1.5rem;
            --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.06), 0 1px 2px rgba(0, 0, 0, 0.04);
            --shadow: 0 4px 16px rgba(0, 0, 0, 0.07), 0 2px 6px rgba(0, 0, 0, 0.04);
            --shadow-lg: 0 12px 40px rgba(0, 0, 0, 0.10), 0 4px 12px rgba(0, 0, 0, 0.06);
            --shadow-hover: 0 20px 50px rgba(0, 0, 0, 0.12), 0 8px 20px rgba(0, 0, 0, 0.06);
            --transition: 0.25s cubic-bezier(0.4, 0, 0.2, 1);
            --font-sans: 'Inter', system-ui, -apple-system, 'Segoe UI', Roboto, 'Helvetica Neue', sans-serif;
        }

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

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

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

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

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

        /* ===== 容器 ===== */
        .container {
            max-width: 1200px;
            padding-left: 1.25rem;
            padding-right: 1.25rem;
        }

        /* ===== 导航 Header ===== */
        .site-header {
            background: #ffffff;
            border-bottom: 1px solid var(--border-color);
            box-shadow: var(--shadow-sm);
            position: sticky;
            top: 0;
            z-index: 1050;
            backdrop-filter: blur(10px);
            -webkit-backdrop-filter: blur(10px);
        }

        .site-header .navbar {
            padding-top: 0.6rem;
            padding-bottom: 0.6rem;
        }

        .site-header .logo {
            font-size: 1.45rem;
            font-weight: 700;
            color: var(--text-primary);
            letter-spacing: -0.02em;
            display: flex;
            align-items: center;
            gap: 0.4rem;
        }
        .site-header .logo i {
            color: var(--primary);
            font-size: 1.6rem;
        }
        .site-header .logo:hover {
            color: var(--primary);
        }

        .channel-bar {
            background: #ffffff;
            border-top: 1px solid var(--border-color);
            padding: 0.3rem 0;
        }

        .channel-bar .navbar-nav {
            display: flex;
            flex-wrap: nowrap;
            gap: 0.25rem;
            overflow-x: auto;
            -webkit-overflow-scrolling: touch;
            scrollbar-width: none;
        }
        .channel-bar .navbar-nav::-webkit-scrollbar {
            display: none;
        }

        .channel-bar .nav-link {
            padding: 0.45rem 1.1rem;
            border-radius: var(--radius-sm);
            font-size: 0.9rem;
            font-weight: 500;
            color: var(--text-secondary);
            white-space: nowrap;
            transition: all var(--transition);
            border: 1px solid transparent;
        }
        .channel-bar .nav-link i {
            font-size: 0.8rem;
            opacity: 0.7;
        }
        .channel-bar .nav-link:hover {
            color: var(--primary);
            background: rgba(13, 110, 253, 0.06);
            border-color: rgba(13, 110, 253, 0.12);
        }
        .channel-bar .nav-link.active {
            color: #ffffff;
            background: var(--primary);
            border-color: var(--primary);
            box-shadow: 0 2px 10px rgba(13, 110, 253, 0.25);
        }
        .channel-bar .nav-link.active i {
            opacity: 1;
        }

        /* ===== Hero ===== */
        .hero-section {
            position: relative;
            min-height: 76vh;
            display: flex;
            align-items: center;
            justify-content: center;
            text-align: center;
            background: linear-gradient(145deg, #0b1a33 0%, #132b4a 40%, #1a3a5c 100%);
            overflow: hidden;
            padding: 4rem 0;
        }
        .hero-section::before {
            content: '';
            position: absolute;
            inset: 0;
            background-image: url('/assets/images/backpic/back-1.png');
            background-size: cover;
            background-position: center center;
            opacity: 0.20;
            mix-blend-mode: overlay;
        }
        .hero-section::after {
            content: '';
            position: absolute;
            inset: 0;
            background: radial-gradient(ellipse at 30% 40%, rgba(13, 110, 253, 0.15) 0%, transparent 70%),
                radial-gradient(ellipse at 70% 60%, rgba(249, 115, 22, 0.08) 0%, transparent 60%);
            pointer-events: none;
        }
        .hero-section .container {
            position: relative;
            z-index: 2;
        }
        .hero-section .hero-badge {
            display: inline-block;
            background: rgba(255, 255, 255, 0.08);
            backdrop-filter: blur(8px);
            -webkit-backdrop-filter: blur(8px);
            border: 1px solid rgba(255, 255, 255, 0.12);
            padding: 0.4rem 1.4rem;
            border-radius: 50px;
            font-size: 0.85rem;
            color: var(--primary-light);
            letter-spacing: 0.04em;
            margin-bottom: 1.5rem;
        }
        .hero-section h1 {
            font-size: 3.2rem;
            font-weight: 800;
            color: #ffffff;
            letter-spacing: -0.025em;
            line-height: 1.2;
            margin-bottom: 1rem;
            text-shadow: 0 2px 20px rgba(0, 0, 0, 0.3);
        }
        .hero-section h1 .highlight {
            background: linear-gradient(135deg, var(--primary-light), var(--accent));
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }
        .hero-section .lead {
            font-size: 1.2rem;
            color: rgba(255, 255, 255, 0.78);
            max-width: 700px;
            margin: 0 auto 2rem;
            line-height: 1.7;
        }
        .hero-section .hero-actions {
            display: flex;
            flex-wrap: wrap;
            gap: 1rem;
            justify-content: center;
        }
        .hero-section .btn-hero-primary {
            background: var(--accent);
            border: none;
            color: #fff;
            padding: 0.85rem 2.4rem;
            border-radius: 50px;
            font-weight: 600;
            font-size: 1.05rem;
            box-shadow: 0 8px 28px rgba(249, 115, 22, 0.35);
            transition: all var(--transition);
        }
        .hero-section .btn-hero-primary:hover {
            background: var(--accent-dark);
            transform: translateY(-3px);
            box-shadow: 0 12px 36px rgba(249, 115, 22, 0.45);
        }
        .hero-section .btn-hero-outline {
            background: transparent;
            border: 1.5px solid rgba(255, 255, 255, 0.30);
            color: #fff;
            padding: 0.85rem 2.4rem;
            border-radius: 50px;
            font-weight: 600;
            font-size: 1.05rem;
            backdrop-filter: blur(4px);
            transition: all var(--transition);
        }
        .hero-section .btn-hero-outline:hover {
            background: rgba(255, 255, 255, 0.10);
            border-color: rgba(255, 255, 255, 0.55);
            transform: translateY(-3px);
        }

        .hero-stats {
            display: flex;
            flex-wrap: wrap;
            gap: 2.5rem 3.5rem;
            justify-content: center;
            margin-top: 3rem;
            padding-top: 2.2rem;
            border-top: 1px solid rgba(255, 255, 255, 0.08);
        }
        .hero-stats .stat-item {
            text-align: center;
        }
        .hero-stats .stat-number {
            font-size: 2rem;
            font-weight: 800;
            color: #fff;
            letter-spacing: -0.02em;
        }
        .hero-stats .stat-number i {
            color: var(--accent);
            font-size: 1.6rem;
            margin-right: 0.3rem;
        }
        .hero-stats .stat-label {
            font-size: 0.85rem;
            color: rgba(255, 255, 255, 0.55);
            margin-top: 0.2rem;
        }

        /* ===== 通用板块 ===== */
        .section-padding {
            padding: 5rem 0;
        }
        .section-alt {
            background-color: var(--bg-section-alt);
        }
        .section-title {
            font-size: 2.2rem;
            font-weight: 700;
            letter-spacing: -0.02em;
            margin-bottom: 0.75rem;
            color: var(--text-primary);
        }
        .section-subtitle {
            font-size: 1.05rem;
            color: var(--text-secondary);
            max-width: 640px;
            margin: 0 auto 2.5rem;
            line-height: 1.7;
        }
        .section-header {
            text-align: center;
            margin-bottom: 3.5rem;
        }

        /* ===== 卡片 ===== */
        .card-custom {
            background: var(--bg-card);
            border: 1px solid var(--border-color);
            border-radius: var(--radius);
            box-shadow: var(--shadow-sm);
            transition: all var(--transition);
            overflow: hidden;
            height: 100%;
        }
        .card-custom:hover {
            box-shadow: var(--shadow-hover);
            transform: translateY(-6px);
            border-color: transparent;
        }
        .card-custom .card-body {
            padding: 1.75rem;
        }
        .card-custom .card-icon {
            font-size: 2.2rem;
            color: var(--primary);
            margin-bottom: 1rem;
            display: inline-block;
            background: rgba(13, 110, 253, 0.08);
            width: 3.6rem;
            height: 3.6rem;
            line-height: 3.6rem;
            text-align: center;
            border-radius: var(--radius-sm);
        }
        .card-custom .card-title {
            font-size: 1.2rem;
            font-weight: 600;
            margin-bottom: 0.6rem;
            color: var(--text-primary);
        }
        .card-custom .card-text {
            color: var(--text-secondary);
            font-size: 0.95rem;
            line-height: 1.65;
        }

        .card-cover .card-img-top {
            height: 200px;
            object-fit: cover;
            border-bottom: 1px solid var(--border-color);
        }
        .card-cover .card-body {
            padding: 1.5rem;
        }

        /* ===== 场景卡片 ===== */
        .scene-card {
            background: var(--bg-card);
            border-radius: var(--radius);
            padding: 2rem 1.8rem;
            text-align: center;
            border: 1px solid var(--border-color);
            box-shadow: var(--shadow-sm);
            transition: all var(--transition);
            height: 100%;
        }
        .scene-card:hover {
            box-shadow: var(--shadow-hover);
            transform: translateY(-6px);
            border-color: transparent;
        }
        .scene-card .scene-icon {
            font-size: 2.6rem;
            color: var(--accent);
            margin-bottom: 1.2rem;
            background: rgba(249, 115, 22, 0.10);
            width: 4.4rem;
            height: 4.4rem;
            line-height: 4.4rem;
            border-radius: 50%;
            display: inline-block;
        }
        .scene-card h4 {
            font-size: 1.15rem;
            font-weight: 600;
            margin-bottom: 0.5rem;
        }
        .scene-card p {
            color: var(--text-secondary);
            font-size: 0.92rem;
            line-height: 1.6;
            margin-bottom: 0;
        }

        /* ===== 流程步骤 ===== */
        .steps-row {
            display: flex;
            flex-wrap: wrap;
            gap: 1.5rem;
            justify-content: center;
            counter-reset: step;
        }
        .step-item {
            flex: 1 1 200px;
            max-width: 260px;
            text-align: center;
            position: relative;
            padding: 2rem 1.2rem;
            background: var(--bg-card);
            border-radius: var(--radius);
            border: 1px solid var(--border-color);
            box-shadow: var(--shadow-sm);
            transition: all var(--transition);
            counter-increment: step;
        }
        .step-item:hover {
            box-shadow: var(--shadow);
            transform: translateY(-4px);
        }
        .step-item .step-number {
            font-size: 2.6rem;
            font-weight: 800;
            color: var(--primary);
            opacity: 0.15;
            line-height: 1;
            margin-bottom: 0.2rem;
        }
        .step-item .step-icon {
            font-size: 2rem;
            color: var(--primary);
            margin-bottom: 0.8rem;
            display: block;
        }
        .step-item h5 {
            font-size: 1.05rem;
            font-weight: 600;
            margin-bottom: 0.4rem;
        }
        .step-item p {
            font-size: 0.9rem;
            color: var(--text-secondary);
            margin-bottom: 0;
            line-height: 1.6;
        }
        .step-item::after {
            content: '';
            position: absolute;
            top: 40%;
            right: -1.2rem;
            width: 1.2rem;
            height: 2px;
            background: var(--primary-light);
            opacity: 0.3;
        }
        .step-item:last-child::after {
            display: none;
        }

        /* ===== 信任/数据区块 ===== */
        .trust-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
            gap: 1.5rem;
            text-align: center;
        }
        .trust-item {
            background: var(--bg-card);
            border-radius: var(--radius);
            padding: 2rem 1.2rem;
            border: 1px solid var(--border-color);
            box-shadow: var(--shadow-sm);
            transition: all var(--transition);
        }
        .trust-item:hover {
            box-shadow: var(--shadow);
            transform: translateY(-3px);
        }
        .trust-item .trust-number {
            font-size: 2.4rem;
            font-weight: 800;
            color: var(--primary);
            letter-spacing: -0.02em;
            line-height: 1.2;
        }
        .trust-item .trust-label {
            font-size: 0.9rem;
            color: var(--text-secondary);
            margin-top: 0.3rem;
        }
        .trust-item .trust-icon {
            font-size: 2rem;
            color: var(--accent);
            margin-bottom: 0.5rem;
            display: block;
        }

        /* ===== FAQ ===== */
        .faq-list {
            max-width: 820px;
            margin: 0 auto;
        }
        .faq-item {
            background: var(--bg-card);
            border: 1px solid var(--border-color);
            border-radius: var(--radius-sm);
            margin-bottom: 0.75rem;
            overflow: hidden;
            transition: all var(--transition);
        }
        .faq-item:hover {
            border-color: var(--primary-light);
            box-shadow: var(--shadow-sm);
        }
        .faq-question {
            padding: 1.1rem 1.5rem;
            font-weight: 600;
            font-size: 1rem;
            color: var(--text-primary);
            cursor: pointer;
            display: flex;
            justify-content: space-between;
            align-items: center;
            background: transparent;
            border: none;
            width: 100%;
            text-align: left;
            transition: background var(--transition);
        }
        .faq-question:hover {
            background: rgba(13, 110, 253, 0.03);
        }
        .faq-question i {
            color: var(--primary);
            transition: transform var(--transition);
            font-size: 0.9rem;
        }
        .faq-question[aria-expanded="true"] i {
            transform: rotate(180deg);
        }
        .faq-answer {
            padding: 0 1.5rem 1.1rem;
            color: var(--text-secondary);
            line-height: 1.7;
            font-size: 0.95rem;
        }

        /* ===== CTA ===== */
        .cta-section {
            background: linear-gradient(135deg, #0b1a33 0%, #132b4a 60%, #1a3a5c 100%);
            padding: 4.5rem 0;
            text-align: center;
            position: relative;
            overflow: hidden;
        }
        .cta-section::before {
            content: '';
            position: absolute;
            inset: 0;
            background-image: url('/assets/images/backpic/back-2.webp');
            background-size: cover;
            background-position: center;
            opacity: 0.08;
            mix-blend-mode: overlay;
        }
        .cta-section .container {
            position: relative;
            z-index: 2;
        }
        .cta-section h2 {
            font-size: 2.2rem;
            font-weight: 700;
            color: #fff;
            margin-bottom: 0.8rem;
        }
        .cta-section p {
            font-size: 1.1rem;
            color: rgba(255, 255, 255, 0.7);
            max-width: 600px;
            margin: 0 auto 2rem;
        }
        .cta-section .btn-cta {
            background: var(--accent);
            border: none;
            color: #fff;
            padding: 0.9rem 2.8rem;
            border-radius: 50px;
            font-weight: 600;
            font-size: 1.1rem;
            box-shadow: 0 8px 28px rgba(249, 115, 22, 0.35);
            transition: all var(--transition);
        }
        .cta-section .btn-cta:hover {
            background: var(--accent-dark);
            transform: translateY(-3px);
            box-shadow: 0 12px 36px rgba(249, 115, 22, 0.5);
            color: #fff;
        }
        .cta-section .btn-cta-outline {
            background: transparent;
            border: 1.5px solid rgba(255, 255, 255, 0.25);
            color: #fff;
            padding: 0.9rem 2.4rem;
            border-radius: 50px;
            font-weight: 600;
            font-size: 1.1rem;
            margin-left: 1rem;
            transition: all var(--transition);
        }
        .cta-section .btn-cta-outline:hover {
            background: rgba(255, 255, 255, 0.08);
            border-color: rgba(255, 255, 255, 0.5);
            transform: translateY(-3px);
            color: #fff;
        }

        /* ===== 页脚 ===== */
        .site-footer {
            background: var(--bg-dark);
            color: rgba(255, 255, 255, 0.7);
            padding: 3.5rem 0 1.5rem;
        }
        .site-footer .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr 1.2fr;
            gap: 2.5rem;
            margin-bottom: 2.5rem;
        }
        .site-footer .logo {
            font-size: 1.4rem;
            font-weight: 700;
            color: #fff;
            display: flex;
            align-items: center;
            gap: 0.4rem;
            margin-bottom: 0.8rem;
        }
        .site-footer .logo i {
            color: var(--primary-light);
        }
        .site-footer p {
            font-size: 0.9rem;
            line-height: 1.7;
            color: rgba(255, 255, 255, 0.55);
            max-width: 340px;
        }
        .site-footer h5 {
            font-size: 1rem;
            font-weight: 600;
            color: #fff;
            margin-bottom: 1rem;
        }
        .site-footer ul li {
            margin-bottom: 0.5rem;
        }
        .site-footer ul li a {
            color: rgba(255, 255, 255, 0.55);
            font-size: 0.9rem;
            transition: color var(--transition);
        }
        .site-footer ul li a:hover {
            color: var(--primary-light);
        }
        .site-footer ul li i {
            color: rgba(255, 255, 255, 0.35);
            width: 1.2rem;
        }
        .site-footer .footer-bottom {
            border-top: 1px solid rgba(255, 255, 255, 0.06);
            padding-top: 1.5rem;
            text-align: center;
            font-size: 0.85rem;
            color: rgba(255, 255, 255, 0.4);
        }
        .site-footer .footer-bottom a {
            color: rgba(255, 255, 255, 0.5);
        }
        .site-footer .footer-bottom a:hover {
            color: var(--primary-light);
        }

        /* ===== 响应式 ===== */
        @media (max-width: 1024px) {
            .site-footer .footer-grid {
                grid-template-columns: 1fr 1fr;
                gap: 2rem;
            }
            .hero-section h1 {
                font-size: 2.6rem;
            }
            .hero-stats {
                gap: 1.5rem 2.5rem;
            }
            .step-item::after {
                display: none;
            }
        }

        @media (max-width: 768px) {
            .section-padding {
                padding: 3.5rem 0;
            }
            .hero-section {
                min-height: 60vh;
                padding: 3rem 0;
            }
            .hero-section h1 {
                font-size: 2rem;
            }
            .hero-section .lead {
                font-size: 1rem;
            }
            .hero-stats {
                gap: 1.2rem 1.8rem;
                margin-top: 2rem;
                padding-top: 1.5rem;
            }
            .hero-stats .stat-number {
                font-size: 1.5rem;
            }
            .section-title {
                font-size: 1.7rem;
            }
            .section-subtitle {
                font-size: 0.95rem;
            }
            .steps-row {
                gap: 1rem;
            }
            .step-item {
                flex: 1 1 160px;
                max-width: 100%;
                padding: 1.5rem 1rem;
            }
            .trust-grid {
                grid-template-columns: repeat(2, 1fr);
                gap: 1rem;
            }
            .cta-section h2 {
                font-size: 1.7rem;
            }
            .cta-section .btn-cta-outline {
                margin-left: 0;
                margin-top: 0.8rem;
                display: inline-block;
            }
            .site-footer .footer-grid {
                grid-template-columns: 1fr;
                gap: 1.8rem;
            }
            .site-footer .footer-brand p {
                max-width: 100%;
            }
            .hero-section .hero-actions {
                flex-direction: column;
                align-items: center;
            }
            .hero-section .btn-hero-primary,
            .hero-section .btn-hero-outline {
                width: 100%;
                max-width: 280px;
                text-align: center;
            }
            .channel-bar .nav-link {
                padding: 0.4rem 0.9rem;
                font-size: 0.82rem;
            }
            .site-header .logo {
                font-size: 1.2rem;
            }
        }

        @media (max-width: 520px) {
            .hero-section h1 {
                font-size: 1.6rem;
            }
            .hero-section .lead {
                font-size: 0.92rem;
            }
            .hero-stats {
                flex-direction: column;
                gap: 0.8rem;
            }
            .hero-stats .stat-item {
                display: flex;
                align-items: center;
                justify-content: center;
                gap: 0.6rem;
            }
            .hero-stats .stat-number {
                font-size: 1.3rem;
            }
            .hero-stats .stat-label {
                margin-top: 0;
                font-size: 0.8rem;
            }
            .section-title {
                font-size: 1.4rem;
            }
            .trust-grid {
                grid-template-columns: 1fr 1fr;
                gap: 0.8rem;
            }
            .trust-item .trust-number {
                font-size: 1.8rem;
            }
            .faq-question {
                font-size: 0.92rem;
                padding: 0.9rem 1.2rem;
            }
            .faq-answer {
                padding: 0 1.2rem 0.9rem;
                font-size: 0.88rem;
            }
            .card-custom .card-body {
                padding: 1.2rem;
            }
            .scene-card {
                padding: 1.5rem 1.2rem;
            }
            .cta-section h2 {
                font-size: 1.4rem;
            }
            .cta-section p {
                font-size: 0.95rem;
            }
            .site-header .navbar {
                padding-top: 0.4rem;
                padding-bottom: 0.4rem;
            }
            .channel-bar .nav-link {
                padding: 0.3rem 0.7rem;
                font-size: 0.75rem;
            }
            .channel-bar .nav-link i {
                display: none;
            }
        }

        /* ===== 辅助 ===== */
        .mt-2 {
            margin-top: 0.5rem;
        }
        .mb-2 {
            margin-bottom: 0.5rem;
        }
        .gap-1 {
            gap: 0.5rem;
        }
        .gap-2 {
            gap: 1rem;
        }
        .fw-600 {
            font-weight: 600;
        }
        .text-center {
            text-align: center;
        }
        .rounded-pill {
            border-radius: 50px;
        }

        /* 图片圆角 */
        .img-radius {
            border-radius: var(--radius-sm);
        }

        /* 分割线装饰 */
        .divider {
            width: 60px;
            height: 4px;
            background: linear-gradient(90deg, var(--primary), var(--accent));
            border-radius: 4px;
            margin: 0.6rem auto 1.2rem;
        }
        .divider-left {
            margin: 0.6rem 0 1.2rem;
        }

/* roulang page: article */
/* ===== 设计变量 ===== */
        :root {
            --primary: #0f2b4a;
            --primary-light: #1a3f66;
            --primary-dark: #091b30;
            --accent: #d4a843;
            --accent-light: #e8c46a;
            --accent-dark: #b88e2e;
            --bg-light: #f4f6f9;
            --bg-white: #ffffff;
            --bg-dark: #0a1628;
            --text-dark: #1a1a2e;
            --text-body: #2d2d3f;
            --text-muted: #6b7280;
            --text-light: #f0f2f5;
            --border-color: #e2e6ed;
            --radius-sm: 8px;
            --radius-md: 14px;
            --radius-lg: 24px;
            --shadow-sm: 0 2px 8px rgba(0,0,0,0.05);
            --shadow-md: 0 8px 28px rgba(0,0,0,0.08);
            --shadow-lg: 0 20px 56px rgba(0,0,0,0.12);
            --font-base: 'Inter', system-ui, -apple-system, 'Segoe UI', Roboto, sans-serif;
            --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
        }

        /* ===== Reset & Base ===== */
        *, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
        html { scroll-behavior: smooth; -webkit-font-smoothing: antialiased; }
        body {
            font-family: var(--font-base);
            color: var(--text-body);
            background: var(--bg-light);
            line-height: 1.7;
            font-size: 1rem;
        }
        img { max-width: 100%; height: auto; display: block; }
        a { color: var(--primary); text-decoration: none; transition: var(--transition); }
        a:hover { color: var(--accent); }
        ul, ol { list-style: none; padding: 0; margin: 0; }
        h1, h2, h3, h4, h5, h6 { font-weight: 700; line-height: 1.25; color: var(--text-dark); margin-bottom: 0.5rem; }
        .container { max-width: 1200px; padding-left: 20px; padding-right: 20px; }

        /* ===== 导航 ===== */
        .site-header {
            background: var(--bg-white);
            box-shadow: 0 2px 20px rgba(0,0,0,0.04);
            position: sticky;
            top: 0;
            z-index: 1050;
            border-bottom: 1px solid var(--border-color);
        }
        .top-bar {
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding: 14px 0;
            flex-wrap: wrap;
            gap: 10px;
        }
        .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: 1.6rem; }
        .logo span { background: linear-gradient(135deg, var(--primary), var(--accent)); -webkit-background-clip: text; -webkit-text-fill-color: transparent; background-clip: text; }
        .logo a { color: inherit; text-decoration: none; }

        .channel-bar {
            background: var(--bg-white);
            border-top: 1px solid var(--border-color);
            padding: 6px 0;
        }
        .channel-bar .navbar-nav {
            display: flex;
            flex-direction: row;
            gap: 2px;
            overflow-x: auto;
            flex-wrap: nowrap;
            -webkit-overflow-scrolling: touch;
        }
        .channel-bar .nav-item { flex-shrink: 0; }
        .channel-bar .nav-link {
            padding: 8px 20px;
            font-size: 0.95rem;
            font-weight: 500;
            color: var(--text-muted);
            border-radius: var(--radius-sm);
            transition: var(--transition);
            white-space: nowrap;
            border: 1px solid transparent;
        }
        .channel-bar .nav-link i { color: var(--accent); font-size: 0.85rem; }
        .channel-bar .nav-link:hover {
            color: var(--primary);
            background: var(--bg-light);
            border-color: var(--border-color);
        }
        .channel-bar .nav-link.active {
            color: var(--primary);
            background: rgba(212, 168, 67, 0.08);
            border-color: var(--accent);
            font-weight: 600;
        }
        .channel-bar .nav-link.active i { color: var(--primary); }

        /* ===== 文章 Banner ===== */
        .article-banner {
            position: relative;
            padding: 80px 0 60px;
            background: linear-gradient(135deg, var(--primary-dark) 0%, var(--primary) 60%, var(--primary-light) 100%);
            overflow: hidden;
            min-height: 320px;
            display: flex;
            align-items: center;
        }
        .article-banner::before {
            content: '';
            position: absolute;
            inset: 0;
            background: url('/assets/images/backpic/back-1.png') center center / cover no-repeat;
            opacity: 0.15;
            mix-blend-mode: overlay;
        }
        .article-banner::after {
            content: '';
            position: absolute;
            bottom: 0; left: 0; right: 0;
            height: 80px;
            background: linear-gradient(to top, var(--bg-light), transparent);
        }
        .article-banner .container { position: relative; z-index: 2; }
        .article-banner h1 {
            font-size: 2.4rem;
            font-weight: 800;
            color: var(--text-light);
            max-width: 900px;
            margin-bottom: 16px;
            text-shadow: 0 2px 20px rgba(0,0,0,0.3);
            line-height: 1.2;
        }
        .article-meta {
            display: flex;
            flex-wrap: wrap;
            gap: 20px;
            align-items: center;
            color: rgba(255,255,255,0.75);
            font-size: 0.95rem;
        }
        .article-meta i { color: var(--accent); margin-right: 6px; }
        .article-meta .badge-cat {
            background: var(--accent);
            color: var(--primary-dark);
            padding: 4px 16px;
            border-radius: 30px;
            font-size: 0.8rem;
            font-weight: 600;
            text-transform: uppercase;
            letter-spacing: 0.5px;
        }

        /* ===== 文章正文区 ===== */
        .article-main {
            padding: 50px 0 70px;
            background: var(--bg-light);
        }
        .article-body {
            background: var(--bg-white);
            border-radius: var(--radius-lg);
            padding: 40px 48px;
            box-shadow: var(--shadow-md);
            border: 1px solid var(--border-color);
        }
        .article-body h2, .article-body h3 {
            margin-top: 2rem;
            color: var(--primary);
        }
        .article-body p {
            margin-bottom: 1.2rem;
            font-size: 1.05rem;
            line-height: 1.8;
        }
        .article-body ul, .article-body ol {
            padding-left: 1.8rem;
            margin-bottom: 1.2rem;
        }
        .article-body li { list-style: disc; margin-bottom: 0.4rem; }
        .article-body img { border-radius: var(--radius-md); margin: 1.5rem 0; }
        .article-body blockquote {
            border-left: 4px solid var(--accent);
            padding: 16px 24px;
            background: var(--bg-light);
            border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
            margin: 1.5rem 0;
            font-style: italic;
            color: var(--text-muted);
        }
        .article-not-found {
            text-align: center;
            padding: 60px 20px;
        }
        .article-not-found i { font-size: 4rem; color: var(--accent); margin-bottom: 20px; }
        .article-not-found h3 { font-size: 1.8rem; color: var(--primary); }
        .article-not-found p { color: var(--text-muted); max-width: 480px; margin: 12px auto 24px; }
        .btn-back-home {
            display: inline-flex;
            align-items: center;
            gap: 10px;
            padding: 12px 32px;
            background: var(--primary);
            color: #fff;
            border-radius: 30px;
            font-weight: 600;
            transition: var(--transition);
            border: none;
        }
        .btn-back-home:hover { background: var(--accent); color: var(--primary-dark); transform: translateY(-2px); box-shadow: var(--shadow-md); }

        /* ===== 侧边栏 ===== */
        .sidebar-widget {
            background: var(--bg-white);
            border-radius: var(--radius-md);
            padding: 28px 24px;
            box-shadow: var(--shadow-sm);
            border: 1px solid var(--border-color);
            margin-bottom: 24px;
        }
        .sidebar-widget h5 {
            font-size: 1.1rem;
            font-weight: 700;
            color: var(--primary);
            margin-bottom: 16px;
            padding-bottom: 12px;
            border-bottom: 2px solid var(--accent);
            display: flex;
            align-items: center;
            gap: 8px;
        }
        .sidebar-widget h5 i { color: var(--accent); }
        .sidebar-widget ul li { padding: 8px 0; border-bottom: 1px solid var(--border-color); }
        .sidebar-widget ul li:last-child { border-bottom: none; }
        .sidebar-widget ul li a {
            display: flex;
            align-items: center;
            gap: 8px;
            color: var(--text-body);
            font-size: 0.95rem;
            transition: var(--transition);
        }
        .sidebar-widget ul li a:hover { color: var(--accent); padding-left: 6px; }
        .sidebar-widget ul li a i { color: var(--accent); font-size: 0.8rem; }

        /* ===== 相关推荐 ===== */
        .related-section {
            padding: 60px 0;
            background: var(--bg-white);
        }
        .related-section .section-title {
            font-size: 1.8rem;
            font-weight: 800;
            color: var(--primary);
            margin-bottom: 40px;
            text-align: center;
        }
        .related-section .section-title span { color: var(--accent); }
        .related-card {
            background: var(--bg-light);
            border-radius: var(--radius-md);
            overflow: hidden;
            transition: var(--transition);
            height: 100%;
            border: 1px solid var(--border-color);
        }
        .related-card:hover {
            transform: translateY(-6px);
            box-shadow: var(--shadow-md);
            border-color: var(--accent);
        }
        .related-card .card-img {
            height: 200px;
            background-size: cover;
            background-position: center;
            position: relative;
        }
        .related-card .card-img .tag {
            position: absolute;
            top: 12px;
            left: 12px;
            background: var(--accent);
            color: var(--primary-dark);
            padding: 4px 14px;
            border-radius: 20px;
            font-size: 0.75rem;
            font-weight: 600;
        }
        .related-card .card-body {
            padding: 22px 20px 24px;
        }
        .related-card .card-body h4 {
            font-size: 1.1rem;
            font-weight: 700;
            margin-bottom: 8px;
            color: var(--text-dark);
        }
        .related-card .card-body p {
            font-size: 0.92rem;
            color: var(--text-muted);
            margin-bottom: 14px;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }
        .related-card .card-body .meta-sm {
            font-size: 0.82rem;
            color: var(--text-muted);
            display: flex;
            align-items: center;
            gap: 12px;
        }
        .related-card .card-body .meta-sm i { color: var(--accent); }

        /* ===== 核心优势 ===== */
        .features-section {
            padding: 70px 0;
            background: var(--bg-light);
        }
        .features-section .section-title {
            font-size: 1.8rem;
            font-weight: 800;
            color: var(--primary);
            text-align: center;
            margin-bottom: 12px;
        }
        .features-section .section-sub {
            text-align: center;
            color: var(--text-muted);
            max-width: 600px;
            margin: 0 auto 44px;
            font-size: 1.05rem;
        }
        .feature-item {
            background: var(--bg-white);
            border-radius: var(--radius-md);
            padding: 32px 24px 28px;
            text-align: center;
            transition: var(--transition);
            border: 1px solid var(--border-color);
            height: 100%;
        }
        .feature-item:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow-md);
            border-color: var(--accent);
        }
        .feature-item .icon-wrap {
            width: 64px;
            height: 64px;
            background: linear-gradient(135deg, var(--primary), var(--primary-light));
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            margin: 0 auto 16px;
            font-size: 1.6rem;
            color: var(--accent);
        }
        .feature-item h4 { font-size: 1.15rem; font-weight: 700; margin-bottom: 8px; color: var(--text-dark); }
        .feature-item p { font-size: 0.92rem; color: var(--text-muted); margin-bottom: 0; }

        /* ===== FAQ ===== */
        .faq-section {
            padding: 70px 0;
            background: var(--bg-white);
        }
        .faq-section .section-title {
            font-size: 1.8rem;
            font-weight: 800;
            color: var(--primary);
            text-align: center;
            margin-bottom: 44px;
        }
        .faq-section .section-title span { color: var(--accent); }
        .faq-item {
            background: var(--bg-light);
            border-radius: var(--radius-md);
            padding: 20px 28px;
            margin-bottom: 14px;
            border: 1px solid var(--border-color);
            transition: var(--transition);
            cursor: pointer;
        }
        .faq-item:hover { border-color: var(--accent); box-shadow: var(--shadow-sm); }
        .faq-item .faq-q {
            display: flex;
            justify-content: space-between;
            align-items: center;
            font-weight: 600;
            font-size: 1.05rem;
            color: var(--text-dark);
        }
        .faq-item .faq-q i { color: var(--accent); transition: var(--transition); font-size: 1.1rem; }
        .faq-item.open .faq-q i { transform: rotate(180deg); }
        .faq-item .faq-a {
            padding-top: 14px;
            color: var(--text-muted);
            font-size: 0.95rem;
            line-height: 1.7;
            display: none;
            border-top: 1px solid var(--border-color);
            margin-top: 14px;
        }
        .faq-item.open .faq-a { display: block; }

        /* ===== CTA ===== */
        .cta-section {
            padding: 70px 0;
            background: linear-gradient(135deg, var(--primary-dark), var(--primary), var(--primary-light));
            position: relative;
            overflow: hidden;
        }
        .cta-section::before {
            content: '';
            position: absolute;
            inset: 0;
            background: url('/assets/images/backpic/back-2.webp') center center / cover no-repeat;
            opacity: 0.08;
            mix-blend-mode: overlay;
        }
        .cta-section .container { position: relative; z-index: 2; text-align: center; }
        .cta-section h2 {
            font-size: 2rem;
            font-weight: 800;
            color: var(--text-light);
            margin-bottom: 16px;
        }
        .cta-section p {
            color: rgba(255,255,255,0.8);
            max-width: 600px;
            margin: 0 auto 30px;
            font-size: 1.1rem;
        }
        .cta-btn {
            display: inline-flex;
            align-items: center;
            gap: 12px;
            padding: 16px 44px;
            background: var(--accent);
            color: var(--primary-dark);
            font-weight: 700;
            font-size: 1.05rem;
            border-radius: 50px;
            transition: var(--transition);
            border: 2px solid transparent;
        }
        .cta-btn:hover {
            background: transparent;
            color: var(--accent);
            border-color: var(--accent);
            transform: translateY(-3px);
            box-shadow: 0 12px 40px rgba(212, 168, 67, 0.25);
        }

        /* ===== 页脚 ===== */
        .site-footer {
            background: var(--bg-dark);
            color: rgba(255,255,255,0.7);
            padding: 60px 0 0;
        }
        .site-footer .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr 1.2fr;
            gap: 40px;
            margin-bottom: 40px;
        }
        .site-footer .footer-brand .logo {
            color: var(--text-light);
            font-size: 1.4rem;
            margin-bottom: 16px;
        }
        .site-footer .footer-brand .logo i { color: var(--accent); }
        .site-footer .footer-brand p { font-size: 0.92rem; line-height: 1.7; color: rgba(255,255,255,0.55); max-width: 360px; }
        .site-footer h5 {
            color: var(--text-light);
            font-size: 1rem;
            font-weight: 700;
            margin-bottom: 18px;
            letter-spacing: 0.5px;
        }
        .site-footer ul li { margin-bottom: 10px; }
        .site-footer ul li a {
            color: rgba(255,255,255,0.55);
            font-size: 0.92rem;
            transition: var(--transition);
            display: flex;
            align-items: center;
            gap: 6px;
        }
        .site-footer ul li a:hover { color: var(--accent); padding-left: 4px; }
        .site-footer ul li i { color: var(--accent); width: 18px; font-size: 0.85rem; }
        .site-footer .footer-bottom {
            border-top: 1px solid rgba(255,255,255,0.08);
            padding: 20px 0;
            text-align: center;
            font-size: 0.85rem;
            color: rgba(255,255,255,0.35);
        }
        .site-footer .footer-bottom a {
            color: var(--accent);
            font-weight: 500;
        }
        .site-footer .footer-bottom a:hover { text-decoration: underline; }

        /* ===== 响应式 ===== */
        @media (max-width: 1024px) {
            .site-footer .footer-grid { grid-template-columns: 1fr 1fr; gap: 30px; }
            .article-banner h1 { font-size: 2rem; }
        }
        @media (max-width: 768px) {
            .top-bar { padding: 10px 0; }
            .logo { font-size: 1.25rem; }
            .channel-bar .nav-link { padding: 6px 14px; font-size: 0.85rem; }
            .article-banner { padding: 50px 0 40px; min-height: 240px; }
            .article-banner h1 { font-size: 1.5rem; }
            .article-meta { gap: 12px; font-size: 0.85rem; flex-wrap: wrap; }
            .article-body { padding: 24px 20px; }
            .article-body p { font-size: 0.98rem; }
            .sidebar-widget { margin-top: 30px; }
            .related-section .section-title { font-size: 1.4rem; }
            .features-section .section-title { font-size: 1.4rem; }
            .faq-section .section-title { font-size: 1.4rem; }
            .cta-section h2 { font-size: 1.5rem; }
            .cta-section p { font-size: 0.98rem; }
            .cta-btn { padding: 14px 32px; font-size: 0.95rem; }
            .site-footer .footer-grid { grid-template-columns: 1fr; gap: 24px; }
            .site-footer .footer-brand p { max-width: 100%; }
            .feature-item { padding: 24px 16px 20px; }
            .faq-item { padding: 16px 20px; }
            .related-card .card-img { height: 160px; }
        }
        @media (max-width: 520px) {
            .article-banner h1 { font-size: 1.25rem; }
            .article-body { padding: 18px 14px; }
            .article-body p { font-size: 0.92rem; }
            .channel-bar .nav-link { padding: 4px 10px; font-size: 0.78rem; }
            .logo { font-size: 1.1rem; }
            .top-bar { padding: 8px 0; }
            .feature-item .icon-wrap { width: 52px; height: 52px; font-size: 1.3rem; }
            .cta-section { padding: 50px 0; }
            .cta-btn { padding: 12px 24px; font-size: 0.9rem; width: 100%; justify-content: center; }
        }

        /* ===== 额外辅助 ===== */
        .gap-2 { gap: 8px; }
        .gap-3 { gap: 16px; }
        .gap-4 { gap: 24px; }
        .mt-2 { margin-top: 12px; }
        .mb-2 { margin-bottom: 12px; }
        .mb-3 { margin-bottom: 20px; }
        .mb-4 { margin-bottom: 32px; }
        .text-center { text-align: center; }
        .fw-600 { font-weight: 600; }
        .fw-700 { font-weight: 700; }

        /* 自定义手风琴/FAQ 交互 (纯CSS, 无JS依赖) */
        .faq-item .faq-a { display: none; }
        .faq-item.open .faq-a { display: block; }