/* roulang page: index */
:root {
            --primary: #0e3b5e;
            --secondary: #0ea5a4;
            --accent: #f59e0b;
            --deep: #0a2a44;
            --light: #f0f9f9;
            --bg-body: #f7fafc;
            --text-primary: #1a202c;
            --text-secondary: #4a5568;
            --text-muted: #718096;
            --border-color: #e2e8f0;
            --radius: 14px;
            --radius-sm: 8px;
            --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.06);
            --shadow-md: 0 4px 16px rgba(0, 0, 0, 0.08);
            --shadow-lg: 0 12px 32px rgba(0, 0, 0, 0.12);
            --transition: all 0.3s ease;
        }

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

        html {
            scroll-behavior: smooth;
        }

        body {
            font-family: "PingFang SC", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
            background-color: var(--bg-body);
            color: var(--text-primary);
            line-height: 1.7;
            -webkit-font-smoothing: antialiased;
        }

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

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

        button {
            cursor: pointer;
            border: none;
            font-family: inherit;
            transition: var(--transition);
        }

        input {
            font-family: inherit;
        }

        .container {
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 24px;
        }

        /* 顶部信息条 */
        .topbar {
            background: linear-gradient(135deg, #0a2a44 0%, #0e3b5e 60%, #0ea5a4 100%);
            padding: 6px 0;
            color: rgba(255, 255, 255, 0.85);
            font-size: 13px;
        }

        .topbar-inner {
            display: flex;
            justify-content: space-between;
            align-items: center;
        }

        .topbar-left {
            display: flex;
            align-items: center;
            gap: 20px;
        }

        .topbar-right {
            display: flex;
            align-items: center;
            gap: 16px;
        }

        .topbar a {
            color: rgba(255, 255, 255, 0.85);
            font-size: 13px;
        }

        .topbar a:hover {
            color: #fff;
        }

        /* 主导航 */
        .main-header {
            background: #ffffff;
            border-bottom: 1px solid var(--border-color);
            position: sticky;
            top: 0;
            z-index: 100;
            box-shadow: 0 2px 8px rgba(0, 0, 0, 0.04);
        }

        .nav-container {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 72px;
        }

        .brand {
            display: flex;
            align-items: center;
            gap: 10px;
            flex-shrink: 0;
        }

        .brand-logo {
            width: 38px;
            height: 38px;
            border-radius: 10px;
            background: linear-gradient(135deg, var(--primary), var(--secondary));
            display: flex;
            align-items: center;
            justify-content: center;
            font-weight: 700;
            color: #fff;
            font-size: 15px;
            box-shadow: 0 2px 8px rgba(14, 59, 94, 0.3);
        }

        .brand-text {
            font-size: 20px;
            font-weight: 800;
            color: var(--primary);
            letter-spacing: 0.5px;
        }

        .nav-links {
            display: flex;
            align-items: center;
            gap: 4px;
        }

        .nav-links a {
            padding: 8px 16px;
            border-radius: 8px;
            font-size: 15px;
            font-weight: 500;
            color: var(--text-secondary);
            display: flex;
            align-items: center;
            gap: 6px;
        }

        .nav-links a:hover {
            color: var(--primary);
            background: var(--light);
        }

        .nav-links a.active {
            color: var(--primary);
            background: var(--light);
            font-weight: 600;
        }

        .nav-cta {
            margin-left: 8px;
            background-color: var(--primary);
            color: #fff !important;
            border-radius: 8px;
            padding: 8px 18px !important;
            font-weight: 600;
            font-size: 14px;
            box-shadow: 0 2px 8px rgba(14, 59, 94, 0.25);
        }

        .nav-cta:hover {
            background-color: var(--deep);
            transform: translateY(-1px);
            box-shadow: 0 4px 12px rgba(14, 59, 94, 0.3);
        }

        /* 移动端菜单按钮 */
        .menu-toggle {
            display: none;
            background: none;
            border: none;
            font-size: 24px;
            color: var(--primary);
        }

        /* Hero */
        .hero {
            position: relative;
            background-image: url('/assets/images/backpic/back-1.png');
            background-size: cover;
            background-position: center;
            padding: 120px 0;
            overflow: hidden;
        }

        .hero-overlay {
            position: absolute;
            inset: 0;
            background: linear-gradient(100deg, rgba(10, 42, 68, 0.92) 0%, rgba(14, 59, 94, 0.82) 40%, rgba(14, 165, 164, 0.45) 100%);
        }

        .hero-content {
            position: relative;
            z-index: 10;
            max-width: 720px;
        }

        .hero-badge {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            background: rgba(255, 255, 255, 0.12);
            border: 1px solid rgba(255, 255, 255, 0.25);
            backdrop-filter: blur(8px);
            border-radius: 30px;
            padding: 6px 18px;
            color: #fff;
            font-size: 13px;
            font-weight: 500;
            margin-bottom: 24px;
        }

        .hero h1 {
            font-size: 52px;
            line-height: 1.2;
            font-weight: 800;
            color: #fff;
            margin-bottom: 20px;
            letter-spacing: 1px;
        }

        .hero h1 span {
            color: #67e3df;
        }

        .hero p {
            font-size: 17px;
            color: rgba(255, 255, 255, 0.9);
            line-height: 1.8;
            margin-bottom: 36px;
            max-width: 620px;
        }

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

        .btn {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 13px 28px;
            border-radius: 10px;
            font-size: 15px;
            font-weight: 600;
            transition: all 0.3s ease;
        }

        .btn-primary {
            background-color: var(--accent);
            color: #fff;
            box-shadow: 0 4px 14px rgba(245, 158, 11, 0.35);
        }

        .btn-primary:hover {
            background-color: #d97706;
            transform: translateY(-2px);
            box-shadow: 0 6px 20px rgba(245, 158, 11, 0.4);
        }

        .btn-outline {
            background: rgba(255, 255, 255, 0.1);
            color: #fff;
            border: 1.5px solid rgba(255, 255, 255, 0.4);
            backdrop-filter: blur(4px);
        }

        .btn-outline:hover {
            background: rgba(255, 255, 255, 0.2);
            border-color: #fff;
            transform: translateY(-2px);
        }

        .hero-stats {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 20px;
            margin-top: 60px;
            padding-top: 40px;
            border-top: 1px solid rgba(255, 255, 255, 0.15);
        }

        .hero-stat {
            text-align: left;
        }

        .hero-stat-value {
            font-size: 28px;
            font-weight: 700;
            color: #fff;
            line-height: 1.3;
        }

        .hero-stat-label {
            font-size: 13px;
            color: rgba(255, 255, 255, 0.7);
            margin-top: 4px;
        }

        /* 板块通用 */
        .section {
            padding: 80px 0;
        }

        .section-head {
            text-align: center;
            margin-bottom: 50px;
        }

        .section-tag {
            display: inline-block;
            font-size: 13px;
            font-weight: 600;
            color: var(--secondary);
            background: rgba(14, 165, 164, 0.1);
            border: 1px solid rgba(14, 165, 164, 0.2);
            padding: 4px 16px;
            border-radius: 20px;
            margin-bottom: 14px;
        }

        .section-head h2 {
            font-size: 34px;
            font-weight: 800;
            color: var(--primary);
            line-height: 1.35;
            margin-bottom: 12px;
        }

        .section-head p {
            color: var(--text-secondary);
            font-size: 16px;
            max-width: 620px;
            margin: 0 auto;
        }

        /* 核心特点 */
        .feature-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 24px;
        }

        .feature-card {
            background: #fff;
            border: 1px solid var(--border-color);
            border-radius: var(--radius);
            padding: 36px 24px;
            text-align: center;
            transition: all 0.3s ease;
            box-shadow: var(--shadow-sm);
        }

        .feature-card:hover {
            transform: translateY(-6px);
            box-shadow: var(--shadow-lg);
            border-color: rgba(14, 165, 164, 0.3);
        }

        .feature-icon {
            width: 58px;
            height: 58px;
            border-radius: 16px;
            background: linear-gradient(135deg, rgba(14, 59, 94, 0.08), rgba(14, 165, 164, 0.08));
            display: flex;
            align-items: center;
            justify-content: center;
            margin: 0 auto 18px;
            font-size: 24px;
            color: var(--secondary);
        }

        .feature-card h3 {
            font-size: 17px;
            font-weight: 700;
            color: var(--primary);
            margin-bottom: 10px;
        }

        .feature-card p {
            font-size: 14px;
            color: var(--text-muted);
            line-height: 1.7;
        }

        /* 分类入口 */
        .category-section {
            background: #fff;
        }

        .category-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 24px;
        }

        .category-card {
            border-radius: var(--radius);
            overflow: hidden;
            border: 1px solid var(--border-color);
            transition: all 0.3s ease;
            background: #fff;
        }

        .category-card:hover {
            box-shadow: var(--shadow-lg);
            transform: translateY(-6px);
            border-color: rgba(14, 165, 164, 0.3);
        }

        .category-card-img {
            width: 100%;
            height: 200px;
            object-fit: cover;
            position: relative;
            transition: transform 0.5s ease;
        }

        .category-card:hover .category-card-img {
            transform: scale(1.04);
        }

        .category-card-body {
            padding: 28px;
        }

        .category-card-tag {
            display: inline-block;
            font-size: 12px;
            font-weight: 600;
            color: var(--secondary);
            background: rgba(14, 165, 164, 0.08);
            padding: 4px 14px;
            border-radius: 4px;
            margin-bottom: 12px;
        }

        .category-card-body h3 {
            font-size: 19px;
            font-weight: 700;
            color: var(--primary);
            margin-bottom: 8px;
        }

        .category-card-body p {
            font-size: 14px;
            color: var(--text-secondary);
            line-height: 1.7;
            margin-bottom: 16px;
        }

        .category-link {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            font-size: 14px;
            font-weight: 600;
            color: var(--primary);
        }

        .category-link:hover {
            color: var(--secondary);
            gap: 10px;
        }

        /* 最新信息 */
        .news-card {
            background: #fff;
            border: 1px solid var(--border-color);
            border-radius: var(--radius);
            padding: 24px;
            display: flex;
            gap: 20px;
            align-items: flex-start;
            transition: all 0.3s ease;
            box-shadow: var(--shadow-sm);
        }

        .news-card:hover {
            box-shadow: var(--shadow-md);
            transform: translateY(-2px);
        }

        .news-content {
            flex: 1;
        }

        .news-title {
            font-size: 17px;
            font-weight: 600;
            color: var(--primary);
            margin-bottom: 6px;
            display: block;
        }

        .news-title:hover {
            color: var(--secondary);
        }

        .news-excerpt {
            font-size: 14px;
            color: var(--text-secondary);
            line-height: 1.7;
            margin-bottom: 10px;
        }

        .news-meta {
            display: flex;
            align-items: center;
            gap: 14px;
            font-size: 13px;
            color: var(--text-muted);
        }

        .news-meta i {
            margin-right: 4px;
            color: var(--secondary);
        }

        .news-list {
            display: grid;
            gap: 16px;
        }

        /* 流程 */
        .process-section {
            background: linear-gradient(180deg, #f0f9f9 0%, #ffffff 100%);
        }

        .process-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 24px;
            position: relative;
        }

        .process-grid::before {
            content: '';
            position: absolute;
            top: 30px;
            left: 12%;
            right: 12%;
            height: 2px;
            background: linear-gradient(90deg, var(--primary), var(--secondary));
            opacity: 0.3;
        }

        .process-step {
            text-align: center;
            position: relative;
            background: #fff;
            border-radius: var(--radius);
            padding: 30px 20px;
            border: 1px solid var(--border-color);
            box-shadow: var(--shadow-sm);
            transition: all 0.3s ease;
        }

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

        .process-step-num {
            width: 46px;
            height: 46px;
            border-radius: 50%;
            background: linear-gradient(135deg, var(--primary), var(--secondary));
            color: #fff;
            display: flex;
            align-items: center;
            justify-content: center;
            font-weight: 700;
            font-size: 18px;
            margin: 0 auto 16px;
            box-shadow: 0 4px 12px rgba(14, 165, 164, 0.3);
        }

        .process-step h3 {
            font-size: 16px;
            font-weight: 700;
            color: var(--primary);
            margin-bottom: 8px;
        }

        .process-step p {
            font-size: 13px;
            color: var(--text-muted);
            line-height: 1.6;
        }

        /* 图文区块 */
        .split-section {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 60px;
            align-items: center;
        }

        .split-img {
            border-radius: var(--radius);
            box-shadow: var(--shadow-lg);
            overflow: hidden;
        }

        .split-content .section-tag {
            margin-bottom: 16px;
        }

        .split-content h2 {
            font-size: 30px;
            font-weight: 800;
            color: var(--primary);
            line-height: 1.4;
            margin-bottom: 16px;
        }

        .split-content > p {
            color: var(--text-secondary);
            font-size: 15px;
            line-height: 1.85;
            margin-bottom: 24px;
        }

        .split-points {
            display: grid;
            gap: 12px;
            margin-bottom: 28px;
        }

        .split-point {
            display: flex;
            align-items: flex-start;
            gap: 12px;
            font-size: 14px;
            color: var(--text-secondary);
        }

        .split-point i {
            color: var(--secondary);
            margin-top: 4px;
        }

        /* FAQ */
        .faq-section {
            background: #fff;
        }

        .faq-list {
            max-width: 820px;
            margin: 0 auto;
            display: grid;
            gap: 12px;
        }

        .faq-item {
            border: 1px solid var(--border-color);
            border-radius: var(--radius);
            overflow: hidden;
            background: #fff;
            transition: all 0.3s ease;
        }

        .faq-item:hover {
            border-color: rgba(14, 165, 164, 0.3);
            box-shadow: var(--shadow-sm);
        }

        .faq-question {
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding: 18px 24px;
            font-size: 15px;
            font-weight: 600;
            color: var(--primary);
            cursor: pointer;
            user-select: none;
        }

        .faq-question span {
            flex: 1;
        }

        .faq-question i {
            color: var(--secondary);
            transition: transform 0.3s ease;
        }

        .faq-answer {
            padding: 0 24px;
            max-height: 0;
            overflow: hidden;
            transition: all 0.35s ease;
            color: var(--text-secondary);
            font-size: 14px;
            line-height: 1.8;
        }

        .faq-item.open .faq-answer {
            padding: 0 24px 20px;
            max-height: 500px;
        }

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

        /* CTA */
        .cta-section {
            background: linear-gradient(135deg, var(--deep) 0%, var(--primary) 50%, var(--secondary) 100%);
            padding: 80px 0;
            position: relative;
            overflow: hidden;
        }

        .cta-section::before {
            content: '';
            position: absolute;
            top: -40%;
            right: -20%;
            width: 500px;
            height: 500px;
            border-radius: 50%;
            background: rgba(255, 255, 255, 0.05);
        }

        .cta-box {
            position: relative;
            z-index: 2;
            text-align: center;
            max-width: 640px;
            margin: 0 auto;
        }

        .cta-box h2 {
            font-size: 32px;
            font-weight: 800;
            color: #fff;
            margin-bottom: 14px;
        }

        .cta-box p {
            color: rgba(255, 255, 255, 0.85);
            font-size: 15px;
            line-height: 1.8;
            margin-bottom: 30px;
        }

        /* 页脚 */
        .footer {
            background: var(--deep);
            color: rgba(255, 255, 255, 0.75);
            padding: 60px 0 0;
            font-size: 14px;
        }

        .footer-grid {
            display: grid;
            grid-template-columns: 1.5fr 1fr 1fr 1fr;
            gap: 40px;
            padding-bottom: 40px;
            border-bottom: 1px solid rgba(255, 255, 255, 0.08);
        }

        .footer-brand .brand-text {
            color: #fff;
            margin-bottom: 12px;
            display: block;
            font-size: 20px;
        }

        .footer-brand p {
            color: rgba(255, 255, 255, 0.6);
            line-height: 1.8;
            margin-top: 14px;
        }

        .footer-column h4 {
            color: #fff;
            font-size: 16px;
            margin-bottom: 16px;
            font-weight: 600;
        }

        .footer-column a {
            display: block;
            color: rgba(255, 255, 255, 0.6);
            padding: 4px 0;
            font-size: 14px;
        }

        .footer-column a:hover {
            color: #67e3df;
        }

        .footer-bottom {
            display: flex;
            justify-content: space-between;
            align-items: center;
            padding: 20px 0;
            color: rgba(255, 255, 255, 0.4);
            font-size: 13px;
            flex-wrap: wrap;
            gap: 8px;
        }

        .footer-bottom a {
            color: rgba(255, 255, 255, 0.4);
        }

        .footer-bottom a:hover {
            color: #67e3df;
        }

        /* 移动端响应式 */
        @media (max-width: 1024px) {
            .feature-grid {
                grid-template-columns: repeat(2, 1fr);
            }

            .category-grid {
                grid-template-columns: repeat(3, 1fr);
                gap: 16px;
            }

            .hero h1 {
                font-size: 40px;
            }

            .hero-stats {
                grid-template-columns: repeat(2, 1fr);
            }
        }

        @media (max-width: 768px) {
            .container {
                padding: 0 18px;
            }

            .section {
                padding: 50px 0;
            }

            .topbar-inner {
                flex-direction: column;
                gap: 4px;
                padding: 6px 0;
            }

            .topbar-right {
                display: none;
            }

            .menu-toggle {
                display: block;
                font-size: 26px;
                padding: 8px;
                color: var(--primary);
                background: none;
                border: none;
            }

            .menu-toggle:hover,
            .menu-toggle:focus {
                color: var(--secondary);
            }

            .nav-container {
                height: 60px;
            }

            .nav-links {
                display: none;
                position: absolute;
                top: 60px;
                left: 0;
                right: 0;
                background: #fff;
                flex-direction: column;
                padding: 12px;
                box-shadow: 0 8px 24px rgba(0, 0, 0, 0.08);
                border-bottom: 1px solid var(--border-color);
            }

            .nav-links.active {
                display: flex;
            }

            .nav-links a {
                padding: 12px 16px;
                width: 100%;
                border-radius: 8px;
            }

            .nav-cta {
                margin-left: 0;
                text-align: center;
            }

            .hero {
                padding: 80px 0;
            }

            .hero h1 {
                font-size: 32px;
            }

            .hero p {
                font-size: 15px;
            }

            .split-section {
                grid-template-columns: 1fr;
                gap: 30px;
            }

            .process-grid {
                grid-template-columns: 1fr 1fr;
                gap: 16px;
            }

            .process-grid::before {
                display: none;
            }

            .category-grid {
                grid-template-columns: 1fr;
                gap: 18px;
            }

            .feature-grid {
                grid-template-columns: 1fr;
                gap: 16px;
            }

            .footer-grid {
                grid-template-columns: 1fr 1fr;
                gap: 30px;
            }
        }

        @media (max-width: 520px) {
            .hero h1 {
                font-size: 28px;
            }

            .hero-stats {
                grid-template-columns: 1fr;
                gap: 12px;
            }

            .hero-stat {
                text-align: center;
            }

            .section-head h2 {
                font-size: 26px;
            }

            .process-grid {
                grid-template-columns: 1fr;
            }

            .footer-grid {
                grid-template-columns: 1fr;
            }

            .btn {
                padding: 11px 20px;
                font-size: 14px;
                width: 100%;
                justify-content: center;
            }

            .hero-actions {
                flex-direction: column;
            }
        }

        .badge {
            display: inline-flex;
            align-items: center;
            gap: 4px;
            font-size: 12px;
            font-weight: 500;
            background: rgba(14, 165, 164, 0.1);
            color: var(--secondary);
            padding: 3px 10px;
            border-radius: 4px;
        }

        .divider {
            width: 60px;
            height: 3px;
            background: linear-gradient(90deg, var(--primary), var(--secondary));
            border-radius: 3px;
            margin: 0 auto;
        }

        .text-gradient {
            background: linear-gradient(90deg, #67e3df, #ffffff);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
        }

        .focus-outline:focus-visible {
            outline: 2px solid var(--secondary);
            outline-offset: 2px;
        }

/* roulang page: category1 */
:root {
            --primary: #0B3B5A;
            --primary-light: #14557B;
            --secondary: #1BA4A1;
            --secondary-light: #5BC8C5;
            --bg: #F4F7FB;
            --card-bg: #ffffff;
            --text: #16242F;
            --text-muted: #5A6B7B;
            --border: #DFE6EE;
            --radius: 14px;
            --radius-lg: 20px;
            --shadow: 0 8px 30px rgba(11, 59, 90, .08);
            --shadow-hover: 0 14px 40px rgba(11, 59, 90, .14);
            --container: 1200px;
            --transition: .25s ease
        }
        *,
        *::before,
        *::after {
            box-sizing: border-box
        }
        html {
            scroll-behavior: smooth
        }
        body {
            margin: 0;
            font-family: -apple-system, BlinkMacSystemFont, "PingFang SC", "Microsoft YaHei", "Segoe UI", Roboto, sans-serif;
            background: var(--bg);
            color: var(--text);
            line-height: 1.6;
            -webkit-font-smoothing: antialiased
        }
        img {
            max-width: 100%;
            display: block
        }
        a {
            color: inherit;
            text-decoration: none
        }
        button,
        input {
            font-family: inherit;
            font-size: inherit
        }
        .no-underline {
            text-decoration: none !important
        }
        .container {
            max-width: var(--container);
            margin: 0 auto;
            padding: 0 24px
        }
        .mr-1 {
            margin-right: 4px
        }
        .mr-2 {
            margin-right: 8px
        }
        .text-secondary {
            color: var(--secondary) !important
        }
        .section-pad {
            padding: 84px 0
        }
        .section-head {
            text-align: center;
            max-width: 680px;
            margin: 0 auto 48px
        }
        .section-head h2 {
            font-size: clamp(28px, 4vw, 38px);
            font-weight: 800;
            color: var(--primary);
            letter-spacing: -0.02em;
            margin-bottom: 14px
        }
        .section-head p {
            color: var(--text-muted);
            font-size: 16px;
            line-height: 1.7
        }
        .section-tag {
            display: inline-block;
            background: rgba(27, 164, 161, .1);
            color: var(--secondary);
            font-size: 13px;
            font-weight: 600;
            padding: 5px 16px;
            border-radius: 999px;
            margin-bottom: 14px;
            letter-spacing: .02em
        }
        .btn-primary {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            background: var(--primary);
            color: #fff;
            font-weight: 600;
            font-size: 15px;
            padding: 13px 28px;
            border-radius: 999px;
            border: none;
            cursor: pointer;
            transition: all var(--transition);
            box-shadow: 0 6px 20px rgba(11, 59, 90, .2)
        }
        .btn-primary:hover {
            background: var(--primary-light);
            transform: translateY(-2px);
            box-shadow: 0 10px 28px rgba(11, 59, 90, .28)
        }
        .btn-primary:focus-visible {
            outline: 3px solid rgba(27, 164, 161, .5);
            outline-offset: 3px
        }
        .btn-ghost {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            background: transparent;
            color: var(--primary);
            font-weight: 600;
            font-size: 15px;
            padding: 12px 26px;
            border-radius: 999px;
            border: 1px solid rgba(255, 255, 255, .75);
            cursor: pointer;
            transition: all var(--transition)
        }
        .btn-ghost:hover {
            background: rgba(255, 255, 255, .14);
            border-color: #fff;
            transform: translateY(-2px)
        }
        .btn-ghost:focus-visible {
            outline: 3px solid rgba(255, 255, 255, .4);
            outline-offset: 2px
        }
        .btn-light {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            background: #fff;
            color: var(--primary);
            font-weight: 700;
            font-size: 15px;
            padding: 14px 32px;
            border-radius: 999px;
            border: none;
            cursor: pointer;
            transition: all var(--transition);
            box-shadow: 0 8px 24px rgba(0, 0, 0, .12)
        }
        .btn-light:hover {
            transform: translateY(-2px);
            box-shadow: 0 12px 32px rgba(0, 0, 0, .18)
        }
        .btn-light:focus-visible {
            outline: 3px solid rgba(255, 255, 255, .5);
            outline-offset: 3px
        }

        /* Topbar */
        .topbar {
            background: var(--primary);
            color: rgba(255, 255, 255, .82);
            font-size: 13px;
            padding: 8px 0;
            border-bottom: 1px solid rgba(255, 255, 255, .08)
        }
        .topbar-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 12px;
            flex-wrap: wrap
        }
        .topbar a {
            color: rgba(255, 255, 255, .9);
            transition: color var(--transition)
        }
        .topbar a:hover {
            color: var(--secondary-light)
        }
        .topbar-links {
            display: flex;
            align-items: center;
            gap: 20px
        }
        .topbar-links span {
            display: inline-flex;
            align-items: center;
            gap: 6px
        }

        /* Header */
        .site-header {
            background: #fff;
            border-bottom: 1px solid var(--border);
            position: sticky;
            top: 0;
            z-index: 100;
            box-shadow: 0 2px 12px rgba(11, 59, 90, .04)
        }
        .header-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 76px;
            gap: 20px
        }
        .site-logo {
            display: flex;
            align-items: center;
            gap: 10px;
            font-weight: 800;
            font-size: 20px;
            color: var(--primary);
            white-space: nowrap
        }
        .site-logo i {
            color: var(--secondary);
            font-size: 26px
        }
        .brand-text {
            color: var(--primary);
            letter-spacing: -0.01em
        }
        .nav-links {
            display: flex;
            align-items: center;
            gap: 6px;
            list-style: none;
            margin: 0;
            padding: 0
        }
        .nav-links a {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            padding: 10px 14px;
            border-radius: 10px;
            color: var(--text-muted);
            font-weight: 500;
            font-size: 15px;
            transition: all var(--transition)
        }
        .nav-links a:hover {
            background: rgba(27, 164, 161, .08);
            color: var(--primary)
        }
        .nav-links a.active {
            background: rgba(27, 164, 161, .12);
            color: var(--primary);
            font-weight: 600
        }
        .nav-links a.active::after {
            content: '';
            display: block;
            width: 18px;
            height: 3px;
            border-radius: 3px;
            background: var(--secondary);
            margin: 0 auto;
            position: absolute;
            bottom: -2px;
            left: 50%;
            transform: translateX(-50%)
        }
        .nav-links a.nav-cta {
            background: var(--secondary);
            color: #fff;
            font-weight: 600;
            padding: 10px 22px;
            border-radius: 999px;
            margin-left: 8px;
            box-shadow: 0 4px 14px rgba(27, 164, 161, .3);
            transition: all var(--transition)
        }
        .nav-links a.nav-cta:hover {
            background: var(--primary);
            transform: translateY(-1px);
            box-shadow: 0 8px 20px rgba(11, 59, 90, .25);
            color: #fff
        }
        .nav-toggle {
            display: none;
            background: transparent;
            border: none;
            font-size: 22px;
            color: var(--primary);
            cursor: pointer;
            padding: 8px;
            border-radius: 8px;
            transition: background var(--transition)
        }
        .nav-toggle:hover {
            background: rgba(11, 59, 90, .06)
        }
        .nav-toggle:focus-visible {
            outline: 2px solid var(--secondary);
            outline-offset: 2px
        }

        /* Hero */
        .hero {
            position: relative;
            background-size: cover;
            background-position: center;
            padding: 110px 0 130px;
            color: #fff;
            overflow: hidden
        }
        .hero::before {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(115deg, rgba(8, 32, 52, .92) 20%, rgba(11, 59, 90, .72) 55%, rgba(27, 164, 161, .3) 100%);
            z-index: 1
        }
        .hero-inner {
            position: relative;
            z-index: 2
        }
        .hero-badge {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            background: rgba(255, 255, 255, .14);
            border: 1px solid rgba(255, 255, 255, .2);
            backdrop-filter: blur(8px);
            padding: 7px 18px;
            border-radius: 999px;
            font-size: 14px;
            font-weight: 500;
            margin-bottom: 22px;
            letter-spacing: .02em
        }
        .hero-content h1 {
            font-size: clamp(32px, 6vw, 52px);
            font-weight: 800;
            line-height: 1.2;
            margin-bottom: 22px;
            letter-spacing: -0.02em;
            max-width: 620px
        }
        .hero-content h1 span {
            color: var(--secondary-light)
        }
        .hero-content p {
            font-size: 17px;
            line-height: 1.8;
            max-width: 540px;
            color: rgba(255, 255, 255, .88);
            margin-bottom: 34px
        }
        .hero-actions {
            display: flex;
            gap: 14px;
            flex-wrap: wrap
        }

        /* Stats */
        .stats {
            position: relative;
            z-index: 5;
            margin-top: -56px;
            padding-bottom: 20px
        }
        .stats-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 20px;
            background: #fff;
            border: 1px solid var(--border);
            border-radius: var(--radius-lg);
            padding: 34px 30px;
            box-shadow: var(--shadow)
        }
        .stat-card {
            text-align: center;
            padding: 10px 6px;
            border-right: 1px solid var(--border)
        }
        .stat-card:last-child {
            border-right: none
        }
        .stat-num {
            font-size: clamp(30px, 4vw, 44px);
            font-weight: 800;
            color: var(--primary);
            letter-spacing: -0.02em;
            line-height: 1.2;
            margin-bottom: 6px
        }
        .stat-num small {
            font-size: .55em;
            color: var(--secondary);
            font-weight: 700;
            margin-left: 2px
        }
        .stat-label {
            font-size: 14px;
            color: var(--text-muted);
            font-weight: 500
        }

        /* 下载前准备 */
        .prep-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 30px
        }
        .prep-card {
            background: #fff;
            border: 1px solid var(--border);
            border-radius: var(--radius-lg);
            overflow: hidden;
            transition: all var(--transition);
            box-shadow: 0 4px 16px rgba(11, 59, 90, .04)
        }
        .prep-card:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow-hover)
        }
        .prep-card img {
            width: 100%;
            height: 200px;
            object-fit: cover;
            border-bottom: 1px solid var(--border)
        }
        .prep-card-body {
            padding: 28px 28px 32px
        }
        .prep-card-body h3 {
            font-size: 20px;
            font-weight: 700;
            color: var(--primary);
            margin: 0 0 12px;
            display: flex;
            align-items: center;
            gap: 10px
        }
        .prep-card-body p {
            color: var(--text-muted);
            font-size: 15px;
            line-height: 1.75;
            margin: 0
        }
        .prep-icon {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 40px;
            height: 40px;
            border-radius: 12px;
            background: rgba(27, 164, 161, .1);
            color: var(--secondary);
            font-size: 18px;
            flex-shrink: 0
        }

        /* 下载流程 */
        .steps-section {
            background: #fff;
            border-top: 1px solid var(--border);
            border-bottom: 1px solid var(--border)
        }
        .steps-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 24px
        }
        .step-card {
            position: relative;
            background: var(--bg);
            border: 1px solid var(--border);
            border-radius: var(--radius);
            padding: 32px 24px 28px;
            transition: all var(--transition)
        }
        .step-card:hover {
            border-color: var(--secondary);
            box-shadow: var(--shadow);
            transform: translateY(-3px)
        }
        .step-num {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 44px;
            height: 44px;
            border-radius: 14px;
            background: var(--primary);
            color: #fff;
            font-size: 18px;
            font-weight: 800;
            margin-bottom: 18px;
            box-shadow: 0 6px 16px rgba(11, 59, 90, .2)
        }
        .step-card h3 {
            font-size: 18px;
            font-weight: 700;
            color: var(--text);
            margin-bottom: 10px
        }
        .step-card p {
            color: var(--text-muted);
            font-size: 14px;
            line-height: 1.7;
            margin: 0
        }
        .step-card::after {
            content: '\f105';
            font-family: 'Font Awesome 6 Free';
            font-weight: 900;
            position: absolute;
            top: 50%;
            right: -18px;
            color: var(--secondary);
            font-size: 18px;
            transform: translateY(-50%);
            z-index: 2;
            background: var(--bg);
            border-radius: 50%;
            width: 28px;
            height: 28px;
            display: flex;
            align-items: center;
            justify-content: center;
            border: 1px solid var(--border)
        }
        .step-card:last-child::after {
            display: none
        }

        /* 热门下载内容 */
        .download-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 28px
        }
        .download-card {
            background: #fff;
            border: 1px solid var(--border);
            border-radius: var(--radius-lg);
            overflow: hidden;
            transition: all var(--transition);
            display: flex;
            flex-direction: column
        }
        .download-card:hover {
            box-shadow: var(--shadow-hover);
            transform: translateY(-5px)
        }
        .download-cover {
            position: relative;
            height: 180px;
            overflow: hidden
        }
        .download-cover img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform .45s ease
        }
        .download-card:hover .download-cover img {
            transform: scale(1.06)
        }
        .download-cover::after {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(to top, rgba(11, 59, 90, .28), transparent 60%)
        }
        .download-body {
            padding: 24px 26px 28px;
            display: flex;
            flex-direction: column;
            flex: 1
        }
        .download-tag {
            display: inline-block;
            background: rgba(27, 164, 161, .1);
            color: var(--secondary);
            font-size: 12px;
            font-weight: 700;
            padding: 4px 12px;
            border-radius: 999px;
            margin-bottom: 12px;
            align-self: flex-start
        }
        .download-body h3 {
            font-size: 19px;
            font-weight: 700;
            color: var(--text);
            margin: 0 0 10px;
            line-height: 1.4
        }
        .download-body p {
            color: var(--text-muted);
            font-size: 14px;
            line-height: 1.7;
            margin-bottom: 20px;
            flex: 1
        }
        .download-meta {
            display: flex;
            align-items: center;
            gap: 16px;
            font-size: 13px;
            color: var(--text-muted);
            padding-top: 16px;
            border-top: 1px solid var(--border)
        }
        .download-meta i {
            color: var(--secondary);
            margin-right: 4px
        }
        .download-link {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            color: var(--primary);
            font-weight: 600;
            font-size: 14px;
            margin-top: 14px;
            transition: gap var(--transition), color var(--transition)
        }
        .download-link:hover {
            gap: 10px;
            color: var(--secondary)
        }

        /* FAQ */
        .faq-section {
            background: #fff;
            border-top: 1px solid var(--border)
        }
        .faq-list {
            max-width: 860px;
            margin: 0 auto
        }
        .faq-item {
            border: 1px solid var(--border);
            border-radius: var(--radius);
            margin-bottom: 14px;
            background: var(--bg);
            overflow: hidden;
            transition: all var(--transition)
        }
        .faq-item:hover {
            border-color: var(--secondary)
        }
        .faq-item summary {
            cursor: pointer;
            padding: 22px 28px;
            font-size: 16px;
            font-weight: 600;
            color: var(--text);
            list-style: none;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 16px;
            transition: color var(--transition)
        }
        .faq-item summary::-webkit-details-marker {
            display: none
        }
        .faq-item summary::after {
            content: '\f078';
            font-family: 'Font Awesome 6 Free';
            font-weight: 900;
            font-size: 14px;
            color: var(--secondary);
            transition: transform var(--transition)
        }
        .faq-item[open] summary::after {
            transform: rotate(180deg)
        }
        .faq-item[open] summary {
            color: var(--primary)
        }
        .faq-item .faq-answer {
            padding: 0 28px 24px;
            color: var(--text-muted);
            font-size: 15px;
            line-height: 1.8;
            border-top: 1px dashed var(--border);
            padding-top: 16px
        }

        /* CTA */
        .cta-section {
            position: relative;
            background-size: cover;
            background-position: center;
            background-attachment: fixed;
            padding: 90px 0;
            color: #fff;
            text-align: center;
            overflow: hidden
        }
        .cta-section::before {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(135deg, rgba(11, 59, 90, .94), rgba(27, 164, 161, .72))
        }
        .cta-inner {
            position: relative;
            z-index: 2;
            max-width: 660px;
            margin: 0 auto
        }
        .cta-inner h2 {
            font-size: clamp(26px, 4vw, 38px);
            font-weight: 800;
            margin-bottom: 16px
        }
        .cta-inner p {
            font-size: 16px;
            line-height: 1.8;
            color: rgba(255, 255, 255, .88);
            margin-bottom: 30px
        }
        .cta-actions {
            display: flex;
            justify-content: center;
            gap: 14px;
            flex-wrap: wrap
        }

        /* Footer */
        .footer {
            background: #0A1824;
            color: rgba(255, 255, 255, .75);
            padding: 70px 0 0;
            font-size: 15px
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 1.2fr 1fr 1fr 1fr;
            gap: 48px;
            padding-bottom: 48px;
            border-bottom: 1px solid rgba(255, 255, 255, .1)
        }
        .footer-brand p {
            color: rgba(255, 255, 255, .6);
            line-height: 1.75;
            margin: 18px 0 0;
            max-width: 320px
        }
        .footer-column h4 {
            color: #fff;
            font-size: 16px;
            font-weight: 700;
            margin-bottom: 20px
        }
        .footer-column a {
            display: block;
            color: rgba(255, 255, 255, .6);
            margin-bottom: 12px;
            transition: color var(--transition), padding-left var(--transition)
        }
        .footer-column a:hover {
            color: var(--secondary-light);
            padding-left: 6px
        }
        .footer-column a:focus-visible,
        .footer-brand a:focus-visible {
            outline: 2px solid var(--secondary-light);
            outline-offset: 4px;
            border-radius: 4px
        }
        .footer-bottom {
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 16px;
            flex-wrap: wrap;
            padding: 22px 0;
            color: rgba(255, 255, 255, .42);
            font-size: 13px
        }
        .footer-bottom a {
            color: rgba(255, 255, 255, .6);
            transition: color var(--transition)
        }
        .footer-bottom a:hover {
            color: var(--secondary-light)
        }

        /* Responsive */
        @media (max-width: 1024px) {
            .stats-grid {
                grid-template-columns: repeat(2, 1fr);
                gap: 24px
            }
            .stat-card {
                border-right: none;
                border-bottom: 1px solid var(--border);
                padding-bottom: 18px
            }
            .stat-card:nth-child(3),
            .stat-card:nth-child(4) {
                border-bottom: none;
                padding-bottom: 6px
            }
            .steps-grid {
                grid-template-columns: repeat(2, 1fr)
            }
            .step-card::after {
                display: none
            }
            .download-grid {
                grid-template-columns: repeat(2, 1fr)
            }
        }
        @media (max-width: 768px) {
            .container {
                padding: 0 18px
            }
            .section-pad {
                padding: 60px 0
            }
            .header-inner {
                height: 68px
            }
            .nav-toggle {
                display: inline-flex
            }
            .nav-links {
                position: absolute;
                top: 100%;
                left: 0;
                right: 0;
                background: #fff;
                flex-direction: column;
                align-items: stretch;
                padding: 14px 18px 20px;
                border-bottom: 1px solid var(--border);
                box-shadow: 0 16px 40px rgba(11, 59, 90, .1);
                gap: 4px;
                display: none;
                max-height: calc(100vh - 68px);
                overflow-y: auto
            }
            .nav-links.open {
                display: flex
            }
            .nav-links a {
                padding: 13px 14px;
                font-size: 16px;
                border-radius: 10px;
                justify-content: flex-start
            }
            .nav-links a.nav-cta {
                margin: 8px 0 0;
                justify-content: center;
                padding: 14px
            }
            .hero {
                padding: 70px 0 100px
            }
            .hero-content h1 {
                font-size: 32px
            }
            .hero-content p {
                font-size: 15px
            }
            .prep-grid {
                grid-template-columns: 1fr
            }
            .download-grid {
                grid-template-columns: 1fr
            }
            .footer-grid {
                grid-template-columns: 1fr 1fr;
                gap: 30px
            }
            .footer-brand {
                grid-column: 1 / -1
            }
        }
        @media (max-width: 520px) {
            .topbar-inner {
                flex-direction: column;
                text-align: center
            }
            .topbar-links {
                gap: 14px;
                flex-wrap: wrap;
                justify-content: center
            }
            .steps-grid {
                grid-template-columns: 1fr
            }
            .stats-grid {
                grid-template-columns: 1fr;
                padding: 24px 18px
            }
            .stat-card {
                border-bottom: 1px solid var(--border);
                padding: 14px 0;
                margin-bottom: 4px
            }
            .stat-card:last-child {
                border-bottom: none
            }
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 26px
            }
            .footer-column h4 {
                margin-bottom: 12px
            }
            .footer-bottom {
                flex-direction: column;
                text-align: center
            }
            .btn-primary,
            .btn-ghost,
            .btn-light {
                width: 100%;
                justify-content: center
            }
            .hero-actions,
            .cta-actions {
                flex-direction: column;
                width: 100%
            }
        }

/* roulang page: article */
:root {
            --primary: #0d9488;
            --primary-dark: #0f766e;
            --primary-light: #ccfbf1;
            --secondary: #3b82f6;
            --accent: #f59e0b;
            --bg: #f6faf9;
            --bg-deep: #0f3d3e;
            --text: #1e293b;
            --text-muted: #64748b;
            --border: #e2e8f0;
            --radius: 16px;
            --radius-sm: 10px;
            --shadow: 0 6px 28px rgba(2, 44, 34, 0.07);
            --shadow-lg: 0 16px 50px rgba(2, 44, 34, 0.13);
            --transition: all 0.25s ease;
        }
        *,
        *::before,
        *::after {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
        }
        html {
            scroll-behavior: smooth;
        }
        body {
            font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
            background: var(--bg);
            color: var(--text);
            line-height: 1.7;
            font-size: 15px;
            -webkit-font-smoothing: antialiased;
        }
        a {
            color: inherit;
            text-decoration: none;
            transition: var(--transition);
        }
        img {
            max-width: 100%;
            display: block;
        }
        .container {
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 24px;
        }
        .no-underline {
            text-decoration: none !important;
        }
        .text-secondary {
            color: var(--secondary);
        }
        .w-full {
            width: 100%;
        }
        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            padding: 12px 26px;
            border-radius: 12px;
            font-weight: 600;
            font-size: 15px;
            border: 2px solid transparent;
            cursor: pointer;
            transition: var(--transition);
            white-space: nowrap;
        }
        .btn-primary {
            background: var(--primary);
            color: #fff;
            box-shadow: 0 6px 18px rgba(13, 148, 136, 0.28);
        }
        .btn-primary:hover {
            background: var(--primary-dark);
            transform: translateY(-2px);
            box-shadow: 0 10px 24px rgba(13, 148, 136, 0.35);
        }
        .btn-outline {
            background: transparent;
            color: var(--primary);
            border-color: var(--primary);
        }
        .btn-outline:hover {
            background: var(--primary-light);
            border-color: var(--primary-dark);
            color: var(--primary-dark);
            transform: translateY(-2px);
        }
        .btn-light {
            background: #fff;
            color: var(--primary-dark);
            border: 2px solid rgba(255, 255, 255, 0.4);
        }
        .btn-light:hover {
            background: var(--primary-light);
            transform: translateY(-2px);
        }
        .badge {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            padding: 5px 14px;
            border-radius: 999px;
            background: rgba(13, 148, 136, 0.1);
            color: var(--primary-dark);
            font-weight: 600;
            font-size: 13px;
        }
        .section-header {
            text-align: center;
            max-width: 720px;
            margin: 0 auto 48px;
        }
        .section-tag {
            display: inline-block;
            padding: 6px 18px;
            border-radius: 999px;
            background: var(--primary-light);
            color: var(--primary-dark);
            font-size: 13px;
            font-weight: 700;
            letter-spacing: 0.5px;
            margin-bottom: 14px;
        }
        .section-header h2 {
            font-size: clamp(26px, 3.2vw, 38px);
            font-weight: 800;
            letter-spacing: -0.5px;
            color: var(--text);
            line-height: 1.25;
        }
        .section-header p {
            color: var(--text-muted);
            margin-top: 14px;
            font-size: 16px;
        }
        /* ===== Topbar ===== */
        .topbar {
            background: var(--bg-deep);
            color: rgba(255, 255, 255, 0.8);
            font-size: 13px;
            border-bottom: 1px solid rgba(255, 255, 255, 0.06);
        }
        .topbar-inner {
            display: flex;
            justify-content: space-between;
            align-items: center;
            min-height: 38px;
            gap: 12px;
        }
        .topbar i {
            color: #5eead4;
        }
        .topbar-right {
            display: flex;
            gap: 22px;
            align-items: center;
        }
        /* ===== Header ===== */
        .main-header {
            position: sticky;
            top: 0;
            z-index: 100;
            background: rgba(255, 255, 255, 0.92);
            backdrop-filter: blur(16px);
            border-bottom: 1px solid var(--border);
            box-shadow: 0 2px 20px rgba(0, 0, 0, 0.03);
        }
        .header-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            min-height: 74px;
            gap: 20px;
        }
        .logo {
            display: flex;
            align-items: center;
            gap: 10px;
            flex-shrink: 0;
        }
        .logo-icon {
            width: 40px;
            height: 40px;
            border-radius: 12px;
            background: linear-gradient(135deg, #0d9488, #0f766e);
            color: #fff;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 18px;
            box-shadow: 0 4px 14px rgba(13, 148, 136, 0.35);
        }
        .logo-text {
            font-size: 21px;
            font-weight: 800;
            color: var(--text);
            letter-spacing: -0.3px;
        }
        .logo-text span {
            color: var(--primary);
        }
        .nav-links {
            display: flex;
            align-items: center;
            gap: 6px;
        }
        .nav-links a {
            padding: 9px 15px;
            border-radius: 10px;
            font-weight: 600;
            font-size: 14px;
            color: var(--text-muted);
            display: flex;
            align-items: center;
            gap: 6px;
            transition: var(--transition);
        }
        .nav-links a:hover {
            color: var(--primary);
            background: rgba(13, 148, 136, 0.07);
        }
        .nav-links a.active {
            color: var(--primary-dark);
            background: var(--primary-light);
        }
        .nav-links a.nav-cta {
            background: var(--primary);
            color: #fff;
            border-radius: 10px;
            padding: 10px 20px;
            box-shadow: 0 4px 14px rgba(13, 148, 136, 0.25);
            margin-left: 6px;
        }
        .nav-links a.nav-cta:hover {
            background: var(--primary-dark);
            transform: translateY(-1px);
        }
        .nav-toggle {
            display: none;
            background: none;
            border: none;
            font-size: 24px;
            color: var(--text);
            cursor: pointer;
            padding: 8px;
            border-radius: 8px;
        }
        .nav-toggle:hover {
            background: rgba(0, 0, 0, 0.05);
        }
        /* ===== Hero ===== */
        .article-hero {
            background: linear-gradient(135deg, rgba(15, 61, 62, 0.94), rgba(13, 148, 136, 0.82)), url('/assets/images/backpic/back-1.png') center/cover no-repeat;
            padding: 76px 0 64px;
            color: #fff;
            position: relative;
        }
        .hero-tag {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            background: rgba(255, 255, 255, 0.15);
            border: 1px solid rgba(255, 255, 255, 0.2);
            padding: 6px 16px;
            border-radius: 999px;
            font-size: 13px;
            font-weight: 600;
            backdrop-filter: blur(4px);
            margin-bottom: 20px;
        }
        .article-hero h1 {
            font-size: clamp(28px, 4vw, 46px);
            font-weight: 800;
            line-height: 1.25;
            max-width: 820px;
            margin-bottom: 20px;
            letter-spacing: -0.5px;
        }
        .article-meta {
            display: flex;
            flex-wrap: wrap;
            gap: 18px;
            align-items: center;
            font-size: 14px;
            color: rgba(255, 255, 255, 0.85);
        }
        .article-meta .badge-light {
            background: rgba(255, 255, 255, 0.15);
            color: #fff;
            border: 1px solid rgba(255, 255, 255, 0.2);
        }
        .breadcrumb {
            display: flex;
            align-items: center;
            gap: 8px;
            font-size: 13px;
            color: rgba(255, 255, 255, 0.65);
            margin-bottom: 22px;
        }
        .breadcrumb a {
            color: rgba(255, 255, 255, 0.85);
            text-decoration: none;
        }
        .breadcrumb a:hover {
            color: #5eead4;
        }
        .breadcrumb-sep {
            opacity: 0.5;
        }
        /* ===== Article Main ===== */
        .article-section {
            padding: 60px 0 30px;
        }
        .article-layout {
            display: grid;
            grid-template-columns: minmax(0, 1fr) 360px;
            gap: 40px;
            align-items: start;
        }
        .article-main-content {
            background: #fff;
            border-radius: var(--radius);
            box-shadow: var(--shadow);
            border: 1px solid var(--border);
            overflow: hidden;
        }
        .article-cover {
            position: relative;
            height: 320px;
            overflow: hidden;
        }
        .article-cover img {
            width: 100%;
            height: 100%;
            object-fit: cover;
        }
        .article-cover::after {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(180deg, transparent 55%, rgba(0, 0, 0, 0.35));
        }
        .article-body {
            padding: 40px 44px 32px;
        }
        .article-body h2 {
            font-size: 24px;
            font-weight: 800;
            color: var(--text);
            margin: 32px 0 16px;
            padding-left: 16px;
            border-left: 4px solid var(--primary);
            line-height: 1.4;
        }
        .article-body h3 {
            font-size: 20px;
            font-weight: 700;
            color: var(--text);
            margin: 24px 0 12px;
        }
        .article-body p {
            margin: 16px 0;
            color: #334155;
            line-height: 1.9;
        }
        .article-body ul,
        .article-body ol {
            margin: 16px 0;
            padding-left: 24px;
            color: #334155;
        }
        .article-body li {
            margin: 8px 0;
        }
        .article-body blockquote {
            margin: 24px 0;
            padding: 18px 24px;
            background: var(--primary-light);
            border-radius: 12px;
            border-left: 4px solid var(--primary);
            color: #0f3d3e;
        }
        .article-body img {
            border-radius: 14px;
            margin: 24px 0;
            box-shadow: var(--shadow);
        }
        .article-body a {
            color: var(--primary);
            font-weight: 600;
        }
        .article-body a:hover {
            text-decoration: underline;
        }
        .article-tags {
            display: flex;
            flex-wrap: wrap;
            gap: 10px;
            align-items: center;
            padding: 20px 44px;
            border-top: 1px solid var(--border);
            background: #fafcfc;
        }
        .tag-link {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            padding: 5px 14px;
            border-radius: 999px;
            background: #fff;
            border: 1px solid var(--border);
            color: var(--text-muted);
            font-size: 13px;
            font-weight: 500;
            transition: var(--transition);
        }
        .tag-link:hover {
            border-color: var(--primary);
            color: var(--primary);
            background: var(--primary-light);
        }
        .article-actions {
            display: flex;
            flex-wrap: wrap;
            gap: 14px;
            padding: 24px 44px 36px;
            border-top: 1px dashed var(--border);
        }
        .article-actions .btn {
            flex: 1;
            min-width: 160px;
        }
        /* ===== Sidebar ===== */
        .article-sidebar {
            display: flex;
            flex-direction: column;
            gap: 24px;
            position: sticky;
            top: 94px;
        }
        .sidebar-card {
            background: #fff;
            border-radius: var(--radius);
            border: 1px solid var(--border);
            box-shadow: var(--shadow);
            padding: 24px;
        }
        .sidebar-card h3 {
            font-size: 17px;
            font-weight: 700;
            margin-bottom: 18px;
            display: flex;
            align-items: center;
            gap: 10px;
            color: var(--text);
        }
        .sidebar-card h3 i {
            color: var(--primary);
        }
        .sidebar-download {
            background: linear-gradient(145deg, #0f3d3e, #134e4a);
            color: #fff;
            border: none;
            position: relative;
            overflow: hidden;
        }
        .sidebar-download::before {
            content: '';
            position: absolute;
            top: -40px;
            right: -30px;
            width: 120px;
            height: 120px;
            border-radius: 50%;
            background: rgba(94, 234, 212, 0.15);
        }
        .sidebar-download .sidebar-icon {
            width: 52px;
            height: 52px;
            border-radius: 14px;
            background: rgba(255, 255, 255, 0.12);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 22px;
            color: #5eead4;
            margin-bottom: 16px;
        }
        .sidebar-download h3 {
            color: #fff;
            margin-bottom: 10px;
        }
        .sidebar-download p {
            color: rgba(255, 255, 255, 0.7);
            font-size: 14px;
            margin-bottom: 20px;
            line-height: 1.6;
        }
        .sidebar-download .btn {
            margin-bottom: 12px;
        }
        .sidebar-download .btn:last-child {
            margin-bottom: 0;
        }
        .sidebar-list {
            list-style: none;
        }
        .sidebar-list li {
            display: flex;
            align-items: flex-start;
            gap: 12px;
            padding: 12px 0;
            border-bottom: 1px solid var(--border);
        }
        .sidebar-list li:last-child {
            border-bottom: none;
        }
        .sidebar-thumb {
            width: 64px;
            height: 52px;
            border-radius: 10px;
            object-fit: cover;
            flex-shrink: 0;
            background: var(--primary-light);
        }
        .sidebar-list-info {
            flex: 1;
            min-width: 0;
        }
        .sidebar-list-info a {
            font-size: 14px;
            font-weight: 600;
            color: var(--text);
            line-height: 1.4;
            display: block;
            display: -webkit-box;
            overflow: hidden;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
        }
        .sidebar-list-info a:hover {
            color: var(--primary);
        }
        .sidebar-list-info time {
            font-size: 12px;
            color: var(--text-muted);
            margin-top: 4px;
        }
        .tags-cloud {
            display: flex;
            flex-wrap: wrap;
            gap: 8px;
        }
        .tag-item {
            padding: 5px 14px;
            background: #f3f8f7;
            border-radius: 999px;
            border: 1px solid var(--border);
            font-size: 13px;
            font-weight: 500;
            color: var(--text-muted);
            transition: var(--transition);
        }
        .tag-item:hover {
            background: var(--primary-light);
            border-color: var(--primary);
            color: var(--primary-dark);
        }
        /* ===== Related ===== */
        .related-section {
            padding: 60px 0 20px;
        }
        .related-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 28px;
        }
        .related-card {
            background: #fff;
            border-radius: var(--radius);
            border: 1px solid var(--border);
            box-shadow: var(--shadow);
            overflow: hidden;
            transition: var(--transition);
        }
        .related-card:hover {
            transform: translateY(-6px);
            box-shadow: var(--shadow-lg);
        }
        .related-cover {
            height: 170px;
            overflow: hidden;
            position: relative;
        }
        .related-cover img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform 0.4s ease;
        }
        .related-card:hover .related-cover img {
            transform: scale(1.05);
        }
        .related-body {
            padding: 20px;
        }
        .related-title {
            font-size: 15px;
            font-weight: 700;
            line-height: 1.5;
            margin-bottom: 10px;
        }
        .related-title a {
            color: var(--text);
        }
        .related-title a:hover {
            color: var(--primary);
        }
        .related-meta {
            display: flex;
            align-items: center;
            justify-content: space-between;
            font-size: 13px;
            color: var(--text-muted);
        }
        /* ===== CTA ===== */
        .cta-section {
            padding: 70px 0;
        }
        .cta-box {
            background: linear-gradient(135deg, #0f3d3e, #0d9488);
            border-radius: 24px;
            padding: 56px 48px;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 40px;
            position: relative;
            overflow: hidden;
            box-shadow: var(--shadow-lg);
        }
        .cta-box::before {
            content: '';
            position: absolute;
            width: 260px;
            height: 260px;
            border-radius: 50%;
            background: rgba(255, 255, 255, 0.06);
            top: -80px;
            right: -60px;
        }
        .cta-box::after {
            content: '';
            position: absolute;
            width: 140px;
            height: 140px;
            border-radius: 50%;
            background: rgba(94, 234, 212, 0.1);
            bottom: -40px;
            left: 30%;
        }
        .cta-content h2 {
            color: #fff;
            font-size: clamp(24px, 3vw, 32px);
            font-weight: 800;
            margin-bottom: 12px;
            letter-spacing: -0.4px;
        }
        .cta-content p {
            color: rgba(255, 255, 255, 0.75);
            font-size: 16px;
            max-width: 460px;
        }
        .cta-actions {
            display: flex;
            gap: 14px;
            flex-wrap: wrap;
            flex-shrink: 0;
        }
        .cta-stats {
            display: flex;
            gap: 36px;
            margin-top: 28px;
        }
        .cta-stat {
            text-align: center;
        }
        .cta-stat strong {
            display: block;
            font-size: 30px;
            font-weight: 800;
            color: #5eead4;
        }
        .cta-stat span {
            font-size: 13px;
            color: rgba(255, 255, 255, 0.6);
        }
        /* ===== FAQ ===== */
        .faq-section {
            padding: 30px 0 70px;
        }
        .faq-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 20px;
            max-width: 1000px;
            margin: 0 auto;
        }
        .faq-item {
            background: #fff;
            border-radius: var(--radius);
            border: 1px solid var(--border);
            padding: 26px 26px 22px;
            box-shadow: var(--shadow);
            transition: var(--transition);
        }
        .faq-item:hover {
            border-color: rgba(13, 148, 136, 0.3);
            box-shadow: var(--shadow-lg);
        }
        .faq-question {
            display: flex;
            align-items: flex-start;
            gap: 12px;
            font-weight: 700;
            font-size: 16px;
            color: var(--text);
            margin-bottom: 10px;
        }
        .faq-question i {
            color: var(--primary);
            margin-top: 3px;
            font-size: 14px;
        }
        .faq-answer {
            padding-left: 26px;
            color: var(--text-muted);
            font-size: 14px;
            line-height: 1.8;
        }
        .faq-answer strong {
            color: var(--primary-dark);
        }
        /* ===== Not Found ===== */
        .notfound-section {
            padding: 100px 0;
        }
        .notfound-box {
            max-width: 560px;
            margin: 0 auto;
            background: #fff;
            border-radius: 24px;
            border: 1px solid var(--border);
            box-shadow: var(--shadow);
            padding: 60px 40px;
            text-align: center;
        }
        .notfound-box .notfound-icon {
            width: 80px;
            height: 80px;
            border-radius: 50%;
            background: var(--primary-light);
            color: var(--primary);
            font-size: 36px;
            display: flex;
            align-items: center;
            justify-content: center;
            margin: 0 auto 20px;
        }
        .notfound-box h1 {
            font-size: 32px;
            font-weight: 800;
            margin-bottom: 12px;
        }
        .notfound-box p {
            color: var(--text-muted);
            margin-bottom: 28px;
        }
        /* ===== Footer ===== */
        .footer {
            background: #0b2f30;
            color: rgba(255, 255, 255, 0.65);
            padding: 70px 0 0;
            font-size: 14px;
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 1.4fr 1fr 1fr 1fr;
            gap: 40px;
            padding-bottom: 50px;
            border-bottom: 1px solid rgba(255, 255, 255, 0.08);
        }
        .footer-brand .brand-text {
            display: flex;
            align-items: center;
            gap: 8px;
            font-size: 22px;
            font-weight: 800;
            color: #fff;
            margin-bottom: 16px;
        }
        .footer-brand p {
            line-height: 1.8;
            max-width: 340px;
        }
        .footer-column h4 {
            color: #fff;
            font-size: 16px;
            font-weight: 700;
            margin-bottom: 20px;
        }
        .footer-column a {
            display: block;
            color: rgba(255, 255, 255, 0.55);
            margin-bottom: 12px;
            transition: var(--transition);
        }
        .footer-column a:hover {
            color: #5eead4;
            padding-left: 4px;
        }
        .footer-bottom {
            display: flex;
            justify-content: space-between;
            flex-wrap: wrap;
            gap: 10px;
            padding: 24px 0;
            color: rgba(255, 255, 255, 0.4);
            font-size: 13px;
        }
        .footer-bottom a {
            color: rgba(255, 255, 255, 0.6);
        }
        .footer-bottom a:hover {
            color: #5eead4;
        }
        /* ===== Responsive ===== */
        @media (max-width: 1024px) {
            .article-layout {
                grid-template-columns: 1fr;
            }
            .article-sidebar {
                position: static;
                display: grid;
                grid-template-columns: repeat(2, 1fr);
            }
            .footer-grid {
                grid-template-columns: 1fr 1fr;
            }
            .related-grid {
                grid-template-columns: repeat(2, 1fr);
            }
        }
        @media (max-width: 768px) {
            .header-inner {
                min-height: 64px;
            }
            .nav-toggle {
                display: flex;
                align-items: center;
                justify-content: center;
            }
            .nav-links {
                display: none;
                position: absolute;
                top: 100%;
                left: 0;
                right: 0;
                background: #fff;
                flex-direction: column;
                align-items: stretch;
                padding: 16px 24px;
                border-bottom: 1px solid var(--border);
                box-shadow: 0 16px 30px rgba(0, 0, 0, 0.08);
                gap: 8px;
            }
            .nav-links.open {
                display: flex;
            }
            .nav-links a {
                padding: 14px 18px;
                border-radius: 12px;
            }
            .nav-links a.nav-cta {
                margin-left: 0;
                text-align: center;
            }
            .topbar-right {
                display: none;
            }
            .cta-box {
                flex-direction: column;
                padding: 40px 28px;
                text-align: center;
            }
            .cta-actions {
                justify-content: center;
            }
            .faq-grid {
                grid-template-columns: 1fr;
            }
            .article-body {
                padding: 28px 22px;
            }
            .article-tags,
            .article-actions {
                padding-left: 22px;
                padding-right: 22px;
            }
            .article-cover {
                height: 220px;
            }
            .article-sidebar {
                grid-template-columns: 1fr;
            }
            .cta-stats {
                justify-content: center;
            }
        }
        @media (max-width: 520px) {
            .container {
                padding: 0 16px;
            }
            .logo-text {
                font-size: 18px;
            }
            .related-grid {
                grid-template-columns: 1fr;
            }
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 30px;
            }
            .footer-bottom {
                justify-content: center;
                text-align: center;
            }
            .article-hero {
                padding: 52px 0 44px;
            }
            .article-meta {
                gap: 12px;
            }
            .cta-box {
                padding: 32px 20px;
                border-radius: 18px;
            }
            .cta-stats {
                flex-wrap: wrap;
                gap: 20px;
            }
            .notfound-box {
                padding: 40px 24px;
            }
        }

/* roulang page: category2 */
:root {
            --primary: #0f766e;
            --primary-strong: #115e59;
            --primary-soft: #ccfbf1;
            --accent: #0ea5e9;
            --accent-soft: #e0f2fe;
            --bg: #f8fafc;
            --bg-deep: #0f172a;
            --text: #0f172a;
            --text-soft: #475569;
            --muted: #94a3b8;
            --border: #e2e8f0;
            --card-bg: #ffffff;
            --radius-lg: 20px;
            --radius-md: 14px;
            --radius-sm: 8px;
            --shadow-sm: 0 1px 3px rgba(15, 23, 42, .08);
            --shadow-md: 0 8px 24px rgba(15, 23, 42, .08);
            --shadow-lg: 0 20px 48px rgba(15, 23, 42, .12);
            --space-section: 88px;
            --font-sans: "PingFang SC", "Microsoft YaHei", "Helvetica Neue", system-ui, -apple-system, sans-serif;
        }

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

        html {
            scroll-behavior: smooth;
        }

        body {
            font-family: var(--font-sans);
            background: var(--bg);
            color: var(--text);
            line-height: 1.7;
            -webkit-font-smoothing: antialiased;
        }

        a {
            color: var(--primary);
            text-decoration: none;
            transition: color .25s ease;
        }

        a:hover {
            color: var(--primary-strong);
        }

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

        ul,
        ol {
            list-style: none;
        }

        .container {
            width: 100%;
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 24px;
        }

        .section {
            padding: var(--space-section) 0;
        }

        .section-label {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            background: var(--primary-soft);
            color: var(--primary);
            font-size: 13px;
            font-weight: 700;
            padding: 6px 16px;
            border-radius: 40px;
            letter-spacing: .5px;
        }

        .section-title {
            font-size: 34px;
            font-weight: 800;
            line-height: 1.25;
            margin: 14px 0 10px;
            letter-spacing: -1px;
        }

        .section-subtitle {
            font-size: 16px;
            color: var(--text-soft);
            max-width: 640px;
        }

        /* Header */
        .top-bar {
            background: var(--bg-deep);
            color: #cbd5e1;
            font-size: 13px;
            padding: 8px 0;
        }

        .top-bar-inner {
            display: flex;
            justify-content: space-between;
            align-items: center;
            gap: 12px;
            flex-wrap: wrap;
        }

        .top-bar-inner span {
            display: inline-flex;
            align-items: center;
            gap: 6px;
        }

        .top-bar-inner i {
            color: var(--secondary);
        }

        .main-nav {
            background: rgba(255, 255, 255, .92);
            backdrop-filter: blur(12px);
            border-bottom: 1px solid var(--border);
            position: sticky;
            top: 0;
            z-index: 100;
            box-shadow: var(--shadow-sm);
        }

        .nav-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            min-height: 72px;
            gap: 16px;
        }

        .brand-logo {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 20px;
            font-weight: 800;
            color: var(--text);
            white-space: nowrap;
            flex-shrink: 0;
        }

        .brand-logo i {
            font-size: 26px;
            color: var(--primary);
        }

        .nav-links {
            display: flex;
            align-items: center;
            gap: 4px;
            flex-wrap: wrap;
        }

        .nav-links a {
            display: inline-flex;
            align-items: center;
            gap: 7px;
            padding: 10px 16px;
            border-radius: 40px;
            font-size: 14px;
            font-weight: 600;
            color: var(--text-soft);
            transition: all .25s ease;
        }

        .nav-links a:hover {
            color: var(--primary);
            background: var(--primary-soft);
        }

        .nav-links a.active {
            color: #fff;
            background: var(--primary);
            box-shadow: var(--shadow-sm);
        }

        .nav-links .nav-cta {
            background: linear-gradient(135deg, var(--primary), var(--primary-strong));
            color: #fff;
            padding: 10px 24px;
            border-radius: 40px;
            margin-left: 6px;
            box-shadow: 0 4px 14px rgba(15, 118, 110, .35);
        }

        .nav-links .nav-cta:hover {
            transform: translateY(-2px);
            box-shadow: 0 8px 22px rgba(15, 118, 110, .4);
            color: #fff;
            background: linear-gradient(135deg, #0d9488, #0f766e);
        }

        .menu-toggle {
            display: none;
            background: none;
            border: none;
            font-size: 22px;
            color: var(--text);
            cursor: pointer;
            padding: 8px 12px;
            border-radius: var(--radius-sm);
            transition: background .2s;
        }

        .menu-toggle:hover {
            background: var(--primary-soft);
        }

        .menu-toggle:focus {
            outline: 2px solid var(--primary);
            outline-offset: 2px;
        }

        /* Page Banner */
        .page-banner {
            position: relative;
            background-image: url('/assets/images/backpic/back-2.png');
            background-size: cover;
            background-position: center;
            padding: 90px 0 80px;
            color: #fff;
            isolation: isolate;
        }

        .page-banner::before {
            content: "";
            position: absolute;
            inset: 0;
            background: linear-gradient(120deg, rgba(15, 23, 42, .88), rgba(15, 118, 110, .72));
            z-index: -1;
        }

        .page-banner .breadcrumb {
            display: flex;
            align-items: center;
            gap: 8px;
            font-size: 14px;
            color: rgba(255, 255, 255, .8);
            margin-bottom: 18px;
        }

        .page-banner .breadcrumb a {
            color: rgba(255, 255, 255, .9);
        }

        .page-banner .breadcrumb a:hover {
            color: #fff;
        }

        .page-banner .banner-title {
            font-size: 42px;
            font-weight: 900;
            line-height: 1.2;
            margin-bottom: 14px;
            letter-spacing: -1px;
        }

        .page-banner .banner-desc {
            font-size: 17px;
            max-width: 640px;
            color: rgba(255, 255, 255, .92);
        }

        .banner-tags {
            display: flex;
            gap: 10px;
            flex-wrap: wrap;
            margin-top: 24px;
        }

        .banner-tags span {
            background: rgba(255, 255, 255, .14);
            border: 1px solid rgba(255, 255, 255, .25);
            padding: 6px 14px;
            border-radius: 40px;
            font-size: 13px;
            font-weight: 600;
        }

        /* Latest Version */
        .latest-grid {
            display: grid;
            grid-template-columns: 1.1fr .9fr;
            gap: 48px;
            align-items: center;
        }

        .latest-card {
            background: var(--card-bg);
            border: 1px solid var(--border);
            border-radius: var(--radius-lg);
            padding: 36px;
            box-shadow: var(--shadow-md);
            transition: transform .3s ease, box-shadow .3s ease;
        }

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

        .version-tag {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            background: var(--primary-soft);
            color: var(--primary);
            font-weight: 700;
            font-size: 13px;
            padding: 6px 16px;
            border-radius: 40px;
        }

        .version-number {
            font-size: 36px;
            font-weight: 900;
            color: var(--text);
            margin: 18px 0 8px;
            letter-spacing: -1px;
        }

        .version-meta {
            display: flex;
            gap: 24px;
            flex-wrap: wrap;
            font-size: 14px;
            color: var(--text-soft);
            margin-bottom: 22px;
        }

        .version-meta span {
            display: inline-flex;
            align-items: center;
            gap: 6px;
        }

        .version-meta i {
            color: var(--primary);
        }

        .feature-list {
            margin: 20px 0 28px;
        }

        .feature-list li {
            display: flex;
            align-items: flex-start;
            gap: 10px;
            padding: 6px 0;
            color: var(--text);
            font-size: 15px;
        }

        .feature-list li i {
            color: var(--primary);
            margin-top: 5px;
            font-size: 14px;
        }

        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            padding: 12px 28px;
            border-radius: 40px;
            font-weight: 600;
            font-size: 14px;
            border: none;
            cursor: pointer;
            transition: all .28s ease;
            background: var(--primary);
            color: #fff;
            box-shadow: 0 4px 14px rgba(15, 118, 110, .3);
        }

        .btn:hover {
            transform: translateY(-2px);
            box-shadow: 0 8px 24px rgba(15, 118, 110, .36);
            color: #fff;
            background: var(--primary-strong);
        }

        .btn-outline {
            background: transparent;
            border: 1.5px solid var(--border);
            color: var(--text);
            box-shadow: none;
        }

        .btn-outline:hover {
            border-color: var(--primary);
            color: var(--primary);
            background: var(--primary-soft);
        }

        .btn-group {
            display: flex;
            gap: 12px;
            flex-wrap: wrap;
        }

        .latest-cover {
            border-radius: var(--radius-lg);
            overflow: hidden;
            box-shadow: var(--shadow-lg);
            position: relative;
        }

        .latest-cover img {
            width: 100%;
            height: 380px;
            object-fit: cover;
            transition: transform .5s ease;
        }

        .latest-cover:hover img {
            transform: scale(1.04);
        }

        .latest-cover::after {
            content: "";
            position: absolute;
            inset: 0;
            background: linear-gradient(180deg, transparent 60%, rgba(15, 23, 42, .5));
        }

        /* Timeline */
        .timeline-section {
            background: #fff;
            border-top: 1px solid var(--border);
            border-bottom: 1px solid var(--border);
        }

        .timeline {
            position: relative;
            max-width: 780px;
            margin: 40px auto 0;
            padding: 0 20px;
        }

        .timeline::before {
            content: "";
            position: absolute;
            left: 26px;
            top: 0;
            bottom: 0;
            width: 2px;
            background: linear-gradient(180deg, var(--primary), var(--secondary), transparent);
        }

        .timeline-item {
            position: relative;
            padding-left: 72px;
            margin-bottom: 36px;
        }

        .timeline-dot {
            position: absolute;
            left: 14px;
            top: 4px;
            width: 26px;
            height: 26px;
            border-radius: 50%;
            background: #fff;
            border: 3px solid var(--primary);
            box-shadow: 0 0 0 5px var(--primary-soft);
            z-index: 1;
            display: flex;
            align-items: center;
            justify-content: center;
        }

        .timeline-dot i {
            font-size: 11px;
            color: var(--primary);
        }

        .timeline-content {
            background: var(--bg);
            border: 1px solid var(--border);
            border-radius: var(--radius-md);
            padding: 22px 26px;
            transition: box-shadow .25s, transform .25s;
        }

        .timeline-content:hover {
            box-shadow: var(--shadow-md);
            transform: translateY(-2px);
        }

        .timeline-version {
            display: flex;
            align-items: center;
            gap: 12px;
            flex-wrap: wrap;
            margin-bottom: 8px;
        }

        .timeline-version strong {
            font-size: 19px;
            color: var(--text);
        }

        .timeline-version span {
            font-size: 13px;
            color: var(--muted);
            background: #f1f5f9;
            padding: 3px 12px;
            border-radius: 40px;
            border: 1px solid var(--border);
        }

        .timeline-content p {
            font-size: 15px;
            color: var(--text-soft);
            margin-top: 6px;
        }

        /* Update Categories */
        .cat-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 28px;
            margin-top: 38px;
        }

        .category-card {
            background: var(--card-bg);
            border: 1px solid var(--border);
            border-radius: var(--radius-lg);
            overflow: hidden;
            transition: all .3s ease;
            display: flex;
            flex-direction: column;
            box-shadow: var(--shadow-sm);
        }

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

        .category-card .cover-box {
            position: relative;
            height: 200px;
            overflow: hidden;
        }

        .category-card .cover-box img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform .5s ease;
        }

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

        .category-card .cover-box::after {
            content: "";
            position: absolute;
            inset: 0;
            background: linear-gradient(180deg, transparent 50%, rgba(15, 23, 42, .55));
        }

        .category-card .cover-tag {
            position: absolute;
            left: 16px;
            top: 16px;
            z-index: 2;
            background: rgba(255, 255, 255, .92);
            color: var(--primary);
            font-size: 13px;
            font-weight: 700;
            padding: 5px 14px;
            border-radius: 40px;
            backdrop-filter: blur(6px);
        }

        .category-card .card-body {
            padding: 26px;
            flex: 1;
            display: flex;
            flex-direction: column;
        }

        .category-card h3 {
            font-size: 20px;
            font-weight: 800;
            margin-bottom: 10px;
        }

        .category-card p {
            font-size: 14px;
            color: var(--text-soft);
            flex: 1;
        }

        .card-link {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            font-size: 14px;
            font-weight: 700;
            color: var(--primary);
            margin-top: 16px;
            transition: gap .25s;
        }

        .card-link:hover {
            gap: 10px;
            color: var(--primary-strong);
        }

        /* Stats */
        .stats-section {
            background: var(--bg-deep);
            background-image: linear-gradient(135deg, rgba(15, 118, 110, .25), rgba(2, 6, 23, .9)), url('/assets/images/backpic/back-1.png');
            background-size: cover;
            background-position: center;
            color: #fff;
            padding: 80px 0;
        }

        .stats-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 32px;
        }

        .stat-item {
            text-align: center;
            padding: 32px 16px;
            background: rgba(255, 255, 255, .08);
            border: 1px solid rgba(255, 255, 255, .14);
            border-radius: var(--radius-lg);
            backdrop-filter: blur(8px);
            transition: background .3s, transform .3s;
        }

        .stat-item:hover {
            background: rgba(255, 255, 255, .14);
            transform: translateY(-4px);
        }

        .stat-icon {
            font-size: 28px;
            color: var(--secondary);
            margin-bottom: 12px;
        }

        .stat-num {
            font-size: 38px;
            font-weight: 900;
            line-height: 1.1;
        }

        .stat-label {
            font-size: 14px;
            color: rgba(255, 255, 255, .8);
            margin-top: 8px;
        }

        /* Notice */
        .notice-grid {
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: 24px;
            margin-top: 32px;
        }

        .notice-card {
            background: #fff;
            border: 1px solid var(--border);
            border-radius: var(--radius-md);
            padding: 26px;
            display: flex;
            gap: 16px;
            align-items: flex-start;
            transition: box-shadow .25s;
        }

        .notice-card:hover {
            box-shadow: var(--shadow-md);
        }

        .notice-icon {
            width: 44px;
            height: 44px;
            border-radius: 12px;
            background: var(--primary-soft);
            color: var(--primary);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 18px;
            flex-shrink: 0;
        }

        .notice-card h4 {
            font-size: 16px;
            font-weight: 700;
            margin-bottom: 4px;
        }

        .notice-card p {
            font-size: 14px;
            color: var(--text-soft);
        }

        /* FAQ */
        .faq-section {
            background: #fff;
            border-top: 1px solid var(--border);
            border-bottom: 1px solid var(--border);
        }

        .faq-list {
            max-width: 800px;
            margin: 36px auto 0;
        }

        .faq-item {
            border: 1px solid var(--border);
            border-radius: var(--radius-md);
            margin-bottom: 14px;
            background: #fff;
            overflow: hidden;
            transition: box-shadow .25s;
        }

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

        .faq-header {
            display: flex;
            justify-content: space-between;
            align-items: center;
            padding: 20px 24px;
            cursor: pointer;
            font-weight: 700;
            font-size: 16px;
            color: var(--text);
            transition: background .2s;
        }

        .faq-header:hover {
            background: #f8fafc;
        }

        .faq-header i {
            color: var(--primary);
            font-size: 14px;
            transition: transform .3s;
        }

        .faq-item.open .faq-header i {
            transform: rotate(180deg);
        }

        .faq-body {
            padding: 0 24px;
            max-height: 0;
            overflow: hidden;
            transition: max-height .35s ease, padding .35s ease;
            font-size: 14px;
            color: var(--text-soft);
            border-top: 0 solid var(--border);
        }

        .faq-item.open .faq-body {
            max-height: 320px;
            padding: 0 24px 20px;
            border-top-width: 1px;
            padding-top: 16px;
        }

        /* CTA */
        .cta-section {
            padding: 70px 0;
        }

        .cta-box {
            background: linear-gradient(135deg, var(--primary-strong), #0d9488), url('/assets/images/backpic/back-3.png');
            background-blend-mode: overlay;
            background-size: cover;
            background-position: center;
            border-radius: 28px;
            padding: 48px 56px;
            color: #fff;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 32px;
            flex-wrap: wrap;
            box-shadow: var(--shadow-lg);
            position: relative;
            overflow: hidden;
        }

        .cta-box::after {
            content: "";
            position: absolute;
            right: -40px;
            top: -40px;
            width: 200px;
            height: 200px;
            background: rgba(255, 255, 255, .08);
            border-radius: 50%;
        }

        .cta-text h3 {
            font-size: 28px;
            font-weight: 800;
            margin-bottom: 8px;
        }

        .cta-text p {
            color: rgba(255, 255, 255, .88);
            font-size: 15px;
        }

        .cta-actions {
            display: flex;
            gap: 12px;
            flex-wrap: wrap;
            position: relative;
            z-index: 2;
        }

        .btn-white {
            background: #fff;
            color: var(--primary-strong);
            box-shadow: 0 4px 14px rgba(0, 0, 0, .18);
        }

        .btn-white:hover {
            background: #f1f5f9;
            color: var(--primary-strong);
        }

        .btn-ghost {
            background: transparent;
            border: 2px solid #fff;
            color: #fff;
            box-shadow: none;
        }

        .btn-ghost:hover {
            background: rgba(255, 255, 255, .14);
            color: #fff;
        }

        /* Footer */
        .footer {
            background: var(--bg-deep);
            color: #cbd5e1;
            padding: 56px 0 26px;
        }

        .footer-grid {
            display: grid;
            grid-template-columns: 1.4fr 1fr 1fr 1fr;
            gap: 40px;
            margin-bottom: 36px;
        }

        .footer-brand .brand-text {
            font-size: 20px;
            font-weight: 800;
            color: #fff;
            display: inline-flex;
            align-items: center;
            gap: 8px;
        }

        .footer-brand p {
            font-size: 14px;
            margin-top: 14px;
            color: #94a3b8;
            line-height: 1.8;
        }

        .footer-column h4 {
            color: #fff;
            font-size: 16px;
            font-weight: 700;
            margin-bottom: 16px;
        }

        .footer-column a {
            display: block;
            font-size: 14px;
            color: #94a3b8;
            padding: 5px 0;
            transition: color .2s, padding-left .2s;
        }

        .footer-column a:hover {
            color: var(--secondary);
            padding-left: 6px;
        }

        .footer-bottom {
            border-top: 1px solid rgba(255, 255, 255, .08);
            padding-top: 22px;
            display: flex;
            justify-content: space-between;
            align-items: center;
            flex-wrap: wrap;
            gap: 10px;
            font-size: 13px;
            color: #64748b;
        }

        .footer-bottom a {
            color: var(--secondary);
        }

        .footer-bottom a:hover {
            color: #fff;
        }

        /* Responsive */
        @media (max-width: 1024px) {
            :root {
                --space-section: 70px;
            }

            .latest-grid {
                grid-template-columns: 1fr;
                gap: 32px;
            }

            .latest-cover img {
                height: 300px;
            }

            .cat-grid {
                grid-template-columns: repeat(2, 1fr);
            }

            .stats-grid {
                grid-template-columns: repeat(2, 1fr);
            }
        }

        @media (max-width: 768px) {
            .container {
                padding: 0 20px;
            }

            .nav-links {
                display: none;
                width: 100%;
                flex-direction: column;
                align-items: stretch;
                background: #fff;
                padding: 16px;
                border-top: 1px solid var(--border);
                position: absolute;
                left: 0;
                top: 100%;
                box-shadow: var(--shadow-lg);
                border-radius: 0 0 16px 16px;
            }

            .nav-links.open {
                display: flex;
            }

            .nav-links a {
                padding: 12px 16px;
                font-size: 15px;
            }

            .nav-links .nav-cta {
                margin-left: 0;
                margin-top: 8px;
                text-align: center;
            }

            .menu-toggle {
                display: block;
            }

            .nav-inner {
                min-height: 64px;
                position: relative;
            }

            .page-banner {
                padding: 60px 0 50px;
            }

            .page-banner .banner-title {
                font-size: 30px;
            }

            .section-title {
                font-size: 27px;
            }

            .notice-grid {
                grid-template-columns: 1fr;
            }

            .cta-box {
                padding: 36px 28px;
                flex-direction: column;
                align-items: flex-start;
            }

            .footer-grid {
                grid-template-columns: repeat(2, 1fr);
                gap: 28px;
            }

            .footer-bottom {
                flex-direction: column;
                text-align: center;
            }
        }

        @media (max-width: 520px) {
            .top-bar-inner {
                justify-content: center;
                text-align: center;
                font-size: 12px;
            }

            .cat-grid {
                grid-template-columns: 1fr;
            }

            .stats-grid {
                grid-template-columns: 1fr 1fr;
                gap: 16px;
            }

            .stat-num {
                font-size: 28px;
            }

            .version-number {
                font-size: 28px;
            }

            .latest-card {
                padding: 26px 20px;
            }

            .timeline {
                padding: 0;
            }

            .timeline-content {
                padding: 18px;
            }

            .footer-grid {
                grid-template-columns: 1fr;
            }

            .btn-group {
                flex-direction: column;
                align-items: stretch;
            }

            .btn {
                width: 100%;
            }
        }

/* roulang page: category3 */
/* ============ 设计变量 ============ */
        :root {
            --primary: #0f172a;
            --primary-light: #1e293b;
            --secondary: #14b8a6;
            --secondary-dark: #0d9488;
            --accent: #f59e0b;
            --bg-soft: #f8fafc;
            --bg-muted: #f1f5f9;
            --text-main: #1e293b;
            --text-weak: #64748b;
            --text-faint: #94a3b8;
            --border: #e2e8f0;
            --radius: 1rem;
            --radius-sm: .65rem;
            --shadow-sm: 0 1px 3px rgba(0, 0, 0, .06);
            --shadow-md: 0 10px 30px rgba(0, 0, 0, .08);
            --shadow-lg: 0 20px 50px rgba(0, 0, 0, .12);
            --header-h: 76px;
        }

        /* ============ 基础 Reset ============ */
        * {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
        }
        html {
            scroll-behavior: smooth;
        }
        body {
            font-family: "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
            line-height: 1.7;
            background: #fff;
            color: var(--text-main);
            -webkit-font-smoothing: antialiased;
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
        }
        a {
            text-decoration: none;
            color: inherit;
            transition: all .25s ease;
        }
        button,
        input,
        select,
        textarea {
            font-family: inherit;
            font-size: inherit;
            outline: none;
        }
        ul,
        ol {
            list-style: none;
        }
        .no-underline {
            text-decoration: none !important;
        }

        /* ============ 容器 ============ */
        .container {
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 20px;
        }

        /* ============ 顶部信息条 ============ */
        .topbar {
            background: var(--primary);
            color: #94a3b8;
            font-size: 13px;
            padding: 8px 0;
            border-bottom: 1px solid rgba(255, 255, 255, .08);
        }
        .topbar-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            flex-wrap: wrap;
            gap: 4px 16px;
        }
        .topbar a {
            color: #e2e8f0;
            font-weight: 500;
            margin-left: 10px;
        }
        .topbar a:hover {
            color: #fff;
        }

        /* ============ 主导航 ============ */
        .site-header {
            background: rgba(255, 255, 255, .96);
            backdrop-filter: blur(8px);
            border-bottom: 1px solid var(--border);
            position: sticky;
            top: 0;
            z-index: 999;
            height: var(--header-h);
        }
        .header-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 16px;
            height: var(--header-h);
        }
        .logo {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 1.3rem;
            font-weight: 800;
            color: var(--primary);
            letter-spacing: .5px;
        }
        .logo i {
            font-size: 1.5rem;
            color: var(--secondary);
        }
        .nav-links {
            display: flex;
            align-items: center;
            gap: 4px;
        }
        .nav-links a {
            padding: 9px 16px;
            border-radius: 999px;
            font-weight: 500;
            color: var(--text-main);
            font-size: .95rem;
            white-space: nowrap;
            transition: all .25s ease;
        }
        .nav-links a:hover {
            background: var(--bg-muted);
            color: var(--secondary-dark);
        }
        .nav-links a.active {
            background: rgba(20, 184, 166, .12);
            color: var(--secondary-dark);
            font-weight: 600;
        }
        .nav-links a.nav-cta {
            background: var(--secondary);
            color: #fff !important;
            font-weight: 700;
            padding: 10px 22px;
            border-radius: 999px;
            box-shadow: 0 4px 14px rgba(20, 184, 166, .35);
        }
        .nav-links a.nav-cta:hover {
            background: var(--secondary-dark);
            transform: translateY(-2px);
            box-shadow: 0 8px 24px rgba(20, 184, 166, .4);
        }
        .nav-toggle {
            display: none;
            background: none;
            border: 1px solid var(--border);
            width: 42px;
            height: 42px;
            border-radius: 10px;
            align-items: center;
            justify-content: center;
            color: var(--text-main);
            cursor: pointer;
            font-size: 1.1rem;
        }
        .nav-toggle:focus-visible {
            outline: 2px solid var(--secondary);
            outline-offset: 2px;
        }

        /* ============ 页内 Hero ============ */
        .page-hero {
            background-size: cover;
            background-position: center;
            position: relative;
            padding: 90px 0 70px;
            color: #fff;
        }
        .page-hero::before {
            content: "";
            position: absolute;
            inset: 0;
            background: linear-gradient(180deg, rgba(15, 23, 42, .9) 0%, rgba(15, 23, 42, .72) 60%, rgba(15, 23, 42, .85) 100%);
        }
        .page-hero .container {
            position: relative;
            z-index: 2;
        }
        .hero-badge {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            background: rgba(255, 255, 255, .12);
            border: 1px solid rgba(255, 255, 255, .2);
            backdrop-filter: blur(6px);
            padding: 6px 18px;
            border-radius: 999px;
            font-size: .85rem;
            letter-spacing: 2px;
            color: #a5f3fc;
        }
        .page-hero h1 {
            font-size: clamp(1.8rem, 4vw, 3rem);
            font-weight: 800;
            line-height: 1.25;
            margin: 20px 0 12px;
            letter-spacing: .5px;
        }
        .page-hero p {
            font-size: clamp(.95rem, 1.5vw, 1.1rem);
            color: #cbd5e1;
            max-width: 640px;
            line-height: 1.8;
        }
        .breadcrumb {
            display: flex;
            align-items: center;
            gap: 8px;
            font-size: .85rem;
            color: #94a3b8;
            margin-top: 18px;
        }
        .breadcrumb a {
            color: #e2e8f0;
        }
        .breadcrumb a:hover {
            color: #fff;
        }
        .search-box {
            display: flex;
            align-items: center;
            background: #fff;
            border-radius: 999px;
            padding: 6px 8px 6px 22px;
            max-width: 560px;
            margin-top: 30px;
            box-shadow: 0 10px 40px rgba(0, 0, 0, .25);
        }
        .search-box i {
            color: var(--text-faint);
            font-size: 1rem;
            margin-right: 12px;
        }
        .search-box input {
            flex: 1;
            border: none;
            background: transparent;
            padding: 10px 0;
            font-size: .95rem;
            color: var(--text-main);
        }
        .search-box input::placeholder {
            color: var(--text-faint);
        }
        .search-box button {
            background: var(--secondary);
            border: none;
            color: #fff;
            font-weight: 600;
            padding: 10px 26px;
            border-radius: 999px;
            cursor: pointer;
            transition: all .25s;
        }
        .search-box button:hover {
            background: var(--secondary-dark);
        }
        .search-box button:focus-visible {
            outline: 2px solid #fff;
            outline-offset: 2px;
        }

        /* ============ 通用板块 ============ */
        .section {
            padding: 72px 0;
        }
        .section-head {
            display: flex;
            align-items: flex-end;
            justify-content: space-between;
            flex-wrap: wrap;
            gap: 12px;
            margin-bottom: 36px;
        }
        .section-eyebrow {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            font-size: .8rem;
            font-weight: 600;
            letter-spacing: 2px;
            color: var(--secondary-dark);
            text-transform: uppercase;
            margin-bottom: 8px;
        }
        .section-head h2 {
            font-size: clamp(1.4rem, 2.5vw, 2rem);
            font-weight: 800;
            color: var(--primary);
            line-height: 1.3;
        }
        .section-head p {
            color: var(--text-weak);
            max-width: 560px;
            font-size: .95rem;
        }

        /* ============ 状态卡 ============ */
        .status-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 20px;
        }
        .status-card {
            background: #fff;
            border: 1px solid var(--border);
            border-radius: var(--radius);
            padding: 28px 22px;
            text-align: center;
            box-shadow: var(--shadow-sm);
            transition: box-shadow .3s, transform .3s;
            position: relative;
            overflow: hidden;
        }
        .status-card::before {
            content: "";
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            height: 3px;
            background: linear-gradient(90deg, var(--secondary), #2dd4bf, var(--secondary));
        }
        .status-card:hover {
            box-shadow: var(--shadow-md);
            transform: translateY(-4px);
        }
        .status-card .status-icon {
            font-size: 1.6rem;
            color: var(--secondary);
            margin-bottom: 10px;
        }
        .status-card strong {
            font-size: 1.8rem;
            font-weight: 800;
            color: var(--primary);
            display: block;
            line-height: 1.2;
        }
        .status-card small {
            color: var(--text-weak);
            font-size: .85rem;
        }
        .status-dot {
            width: 10px;
            height: 10px;
            border-radius: 50%;
            display: inline-block;
            margin-right: 6px;
            background: #10b981;
            box-shadow: 0 0 0 4px rgba(16, 185, 129, .15);
        }

        /* ============ 分类卡片 ============ */
        .category-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 20px;
        }
        .category-card {
            background: #fff;
            border: 1px solid var(--border);
            border-radius: var(--radius);
            padding: 28px 22px;
            transition: all .3s ease;
            position: relative;
        }
        .category-card:hover {
            box-shadow: var(--shadow-md);
            transform: translateY(-5px);
        }
        .category-card .cat-icon {
            width: 54px;
            height: 54px;
            display: flex;
            align-items: center;
            justify-content: center;
            border-radius: 14px;
            font-size: 1.35rem;
            margin-bottom: 16px;
            background: rgba(20, 184, 166, .12);
            color: var(--secondary-dark);
        }
        .category-card h3 {
            font-size: 1.1rem;
            font-weight: 700;
            margin-bottom: 8px;
            color: var(--primary);
        }
        .category-card p {
            font-size: .88rem;
            color: var(--text-weak);
            line-height: 1.6;
            flex: 1;
        }
        .category-card .cat-tag {
            display: inline-block;
            margin-top: 12px;
            font-size: .78rem;
            color: var(--secondary-dark);
            font-weight: 600;
        }
        .category-card .cat-link {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            font-size: .85rem;
            font-weight: 600;
            color: var(--secondary-dark);
            margin-top: 14px;
        }
        .category-card .cat-link i {
            transition: transform .25s;
        }
        .category-card .cat-link:hover i {
            transform: translateX(4px);
        }

        /* ============ FAQ ============ */
        .faq-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 16px;
        }
        .faq-item {
            background: #fff;
            border: 1px solid var(--border);
            border-radius: var(--radius);
            overflow: hidden;
            transition: box-shadow .3s, border-color .3s;
        }
        .faq-item:hover {
            box-shadow: var(--shadow-sm);
        }
        .faq-item.open {
            border-color: rgba(20, 184, 166, .5);
            box-shadow: var(--shadow-md);
        }
        .faq-q {
            width: 100%;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 12px;
            padding: 18px 20px;
            background: none;
            border: none;
            font-size: .95rem;
            font-weight: 600;
            color: var(--text-main);
            text-align: left;
            cursor: pointer;
        }
        .faq-q i {
            font-size: .85rem;
            color: var(--text-faint);
            transition: transform .3s;
            flex-shrink: 0;
        }
        .faq-item.open .faq-q i {
            transform: rotate(180deg);
        }
        .faq-a {
            max-height: 0;
            overflow: hidden;
            transition: max-height .35s ease;
            font-size: .9rem;
            color: var(--text-weak);
            line-height: 1.8;
        }
        .faq-a-inner {
            padding: 0 20px 20px;
        }

        /* ============ 故障排查步骤 ============ */
        .steps-wrap {
            background: var(--primary);
            border-radius: calc(var(--radius) * 1.3);
            padding: 40px 36px;
            color: #fff;
            position: relative;
            overflow: hidden;
        }
        .steps-wrap::after {
            content: "";
            position: absolute;
            right: -120px;
            top: -120px;
            width: 280px;
            height: 280px;
            border-radius: 50%;
            background: radial-gradient(circle, rgba(20, 184, 166, .4), transparent 70%);
        }
        .steps-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 24px;
            position: relative;
            z-index: 1;
        }
        .step-item {
            background: rgba(255, 255, 255, .06);
            border: 1px solid rgba(255, 255, 255, .12);
            border-radius: var(--radius);
            padding: 24px 20px;
            backdrop-filter: blur(6px);
            transition: background .3s;
        }
        .step-item:hover {
            background: rgba(255, 255, 255, .12);
        }
        .step-num {
            font-size: .8rem;
            font-weight: 700;
            letter-spacing: 2px;
            color: #5eead4;
            text-transform: uppercase;
        }
        .step-item h3 {
            font-size: 1rem;
            font-weight: 700;
            margin: 10px 0 8px;
        }
        .step-item p {
            font-size: .85rem;
            color: #cbd5e1;
            line-height: 1.65;
        }

        /* ============ 文章卡片 ============ */
        .article-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 24px;
        }
        .article-card {
            display: flex;
            flex-direction: column;
            background: #fff;
            border: 1px solid var(--border);
            border-radius: var(--radius);
            overflow: hidden;
            transition: all .3s ease;
        }
        .article-card:hover {
            box-shadow: var(--shadow-lg);
            transform: translateY(-5px);
        }
        .article-card .thumb {
            height: 178px;
            overflow: hidden;
            position: relative;
            margin: 10px 10px 0;
            border-radius: calc(var(--radius) - 6px);
        }
        .article-card .thumb img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform .5s;
        }
        .article-card:hover .thumb img {
            transform: scale(1.05);
        }
        .article-card-body {
            padding: 20px;
            display: flex;
            flex-direction: column;
            flex: 1;
        }
        .article-card-body .art-tag {
            align-self: flex-start;
            background: rgba(20, 184, 166, .1);
            color: var(--secondary-dark);
            font-size: .75rem;
            font-weight: 600;
            padding: 3px 12px;
            border-radius: 999px;
            margin-bottom: 10px;
        }
        .article-card-body h3 {
            font-size: 1.05rem;
            font-weight: 700;
            line-height: 1.4;
            color: var(--primary);
            margin-bottom: 8px;
        }
        .article-card-body p {
            font-size: .88rem;
            color: var(--text-weak);
            line-height: 1.65;
            flex: 1;
        }
        .article-card-body .art-more {
            margin-top: 16px;
            font-size: .85rem;
            color: var(--secondary-dark);
            font-weight: 600;
            display: inline-flex;
            align-items: center;
            gap: 6px;
        }

        /* ============ CTA ============ */
        .cta-section {
            background: linear-gradient(135deg, #0f172a 0%, #134e4a 100%);
            border-radius: calc(var(--radius) * 1.4);
            padding: 56px 48px;
            color: #fff;
            display: flex;
            align-items: center;
            justify-content: space-between;
            flex-wrap: wrap;
            gap: 24px;
            position: relative;
            overflow: hidden;
        }
        .cta-section::before {
            content: "";
            position: absolute;
            left: 24px;
            top: 24px;
            width: 160px;
            height: 160px;
            border-radius: 50%;
            background: rgba(20, 184, 166, .22);
            filter: blur(60px);
        }
        .cta-section h2 {
            font-size: clamp(1.3rem, 2.5vw, 1.8rem);
            font-weight: 800;
            margin-bottom: 8px;
        }
        .cta-section p {
            color: #cbd5e1;
            font-size: .95rem;
            max-width: 480px;
        }
        .cta-buttons {
            display: flex;
            flex-wrap: wrap;
            gap: 12px;
            position: relative;
            z-index: 1;
        }
        .btn {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 12px 26px;
            border-radius: 999px;
            font-weight: 600;
            font-size: .95rem;
            border: none;
            cursor: pointer;
            transition: all .3s ease;
        }
        .btn-secondary {
            background: var(--secondary);
            color: #fff;
            box-shadow: 0 6px 20px rgba(20, 184, 166, .35);
        }
        .btn-secondary:hover {
            background: #0f766e;
            transform: translateY(-2px);
        }
        .btn-outline {
            background: transparent;
            color: #fff;
            border: 1px solid rgba(255, 255, 255, .35);
        }
        .btn-outline:hover {
            background: rgba(255, 255, 255, .1);
            border-color: #fff;
            transform: translateY(-2px);
        }

        /* ============ 页脚 ============ */
        .footer {
            background: var(--primary);
            color: #94a3b8;
            padding: 60px 0 0;
            margin-top: 72px;
            font-size: .9rem;
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 1.6fr 1fr 1fr 1fr;
            gap: 40px;
            padding-bottom: 40px;
            border-bottom: 1px solid rgba(255, 255, 255, .08);
        }
        .footer-brand .brand-text {
            font-size: 1.2rem;
            font-weight: 800;
            color: #fff;
        }
        .footer-brand p {
            margin-top: 14px;
            line-height: 1.8;
            max-width: 320px;
        }
        .footer-column h4 {
            color: #fff;
            font-size: .95rem;
            font-weight: 600;
            margin-bottom: 16px;
        }
        .footer-column a {
            display: block;
            padding: 4px 0;
            color: #94a3b8;
        }
        .footer-column a:hover {
            color: #fff;
            padding-left: 4px;
        }
        .footer-bottom {
            display: flex;
            justify-content: space-between;
            align-items: center;
            flex-wrap: wrap;
            gap: 8px;
            padding: 24px 0 32px;
            font-size: .82rem;
        }
        .footer-bottom a {
            color: #e2e8f0;
        }
        .footer-bottom a:hover {
            color: #fff;
        }

        /* ============ 响应式 ============ */
        @media (max-width: 1024px) {
            .category-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .steps-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .footer-grid {
                grid-template-columns: repeat(2, 1fr);
            }
        }

        @media (max-width: 768px) {
            :root {
                --header-h: 64px;
            }
            .topbar {
                display: none;
            }
            .nav-toggle {
                display: flex;
            }
            .nav-links {
                position: fixed;
                top: var(--header-h);
                left: 0;
                right: 0;
                background: #fff;
                flex-direction: column;
                align-items: stretch;
                padding: 12px 20px 20px;
                border-bottom: 1px solid var(--border);
                box-shadow: 0 20px 40px rgba(0, 0, 0, .08);
                transform: translateY(-130%);
                visibility: hidden;
                opacity: 0;
                transition: transform .35s ease, opacity .3s, visibility .3s;
                z-index: 998;
                gap: 6px;
            }
            .nav-links.open {
                transform: translateY(0);
                visibility: visible;
                opacity: 1;
            }
            .nav-links a {
                display: block;
                padding: 12px 18px;
                border-radius: 10px;
                text-align: center;
            }
            .nav-links a.nav-cta {
                margin-top: 10px;
            }
            .page-hero {
                padding: 60px 0 48px;
            }
            .search-box {
                flex-direction: column;
                border-radius: 16px;
                padding: 14px;
                gap: 10px;
                align-items: stretch;
            }
            .search-box input {
                padding: 10px 12px;
                background: var(--bg-muted);
                border-radius: 10px;
            }
            .search-box button {
                border-radius: 10px;
                text-align: center;
            }
            .status-grid {
                grid-template-columns: 1fr;
            }
            .faq-grid {
                grid-template-columns: 1fr;
            }
            .article-grid {
                grid-template-columns: 1fr;
            }
            .section {
                padding: 48px 0;
            }
            .cta-section {
                padding: 36px 24px;
                flex-direction: column;
                align-items: flex-start;
            }
            .steps-wrap {
                padding: 28px 20px;
            }
        }

        @media (max-width: 520px) {
            .container {
                padding: 0 16px;
            }
            .category-grid {
                grid-template-columns: 1fr;
            }
            .steps-grid {
                grid-template-columns: 1fr;
            }
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 28px;
            }
            .footer-bottom {
                flex-direction: column;
                align-items: flex-start;
            }
            .logo {
                font-size: 1.05rem;
            }
        }

        /* ============ 焦点状态 ============ */
        a:focus-visible,
        button:focus-visible,
        input:focus-visible {
            outline: 2px solid var(--secondary);
            outline-offset: 3px;
        }