:root {
            --primary: #10b981;
            --primary-hover: #059669;
            --primary-light: #ecfdf5;
            --primary-dark: #064e3b;
            --text-main: #1f2937;
            --text-muted: #4b5563;
            --bg-light: #f9fafb;
            --bg-white: #ffffff;
            --border-color: #e5e7eb;
            --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
            --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
            --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
            --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
        }

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

        body {
            font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, "Noto Sans CJK SC", sans-serif;
            color: var(--text-main);
            background-color: var(--bg-light);
            line-height: 1.6;
            overflow-x: hidden;
        }

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

        /* 布局容器 */
        .container {
            width: 100%;
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 20px;
        }

        section {
            padding: 80px 0;
            background-color: var(--bg-white);
            border-bottom: 1px solid var(--border-color);
        }

        .section-alt {
            background-color: var(--bg-light);
        }

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

        .section-title h2 {
            font-size: 2.25rem;
            color: var(--primary-dark);
            margin-bottom: 15px;
            position: relative;
            display: inline-block;
        }

        .section-title h2::after {
            content: '';
            position: absolute;
            bottom: -8px;
            left: 50%;
            transform: translateX(-50%);
            width: 60px;
            height: 4px;
            background-color: var(--primary);
            border-radius: 2px;
        }

        .section-title p {
            font-size: 1.1rem;
            color: var(--text-muted);
            max-width: 700px;
            margin: 0 auto;
        }

        /* 顶部导航 */
        .header-nav {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            height: 70px;
            background-color: rgba(255, 255, 255, 0.95);
            backdrop-filter: blur(10px);
            border-bottom: 1px solid var(--border-color);
            z-index: 1000;
            box-shadow: var(--shadow-sm);
        }

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

        .logo-wrap {
            display: flex;
            align-items: center;
        }

        .ai-page-logo {
            height: 40px;
            width: auto;
        }

        .nav-links {
            display: flex;
            gap: 20px;
            list-style: none;
            align-items: center;
        }

        .nav-links a {
            font-size: 0.95rem;
            font-weight: 500;
            color: var(--text-main);
        }

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

        .nav-btn {
            background-color: var(--primary);
            color: #fff !important;
            padding: 8px 18px;
            border-radius: 20px;
            font-weight: bold;
            box-shadow: 0 4px 10px rgba(16, 185, 129, 0.2);
        }

        .nav-btn:hover {
            background-color: var(--primary-hover);
            transform: translateY(-1px);
        }

        .menu-toggle {
            display: none;
            background: none;
            border: none;
            font-size: 1.5rem;
            color: var(--text-main);
            cursor: pointer;
        }

        /* Hero 首屏 (无图片) */
        .hero {
            padding-top: 150px;
            padding-bottom: 100px;
            background: linear-gradient(135deg, #f0fdf4 0%, #ecfdf5 50%, #f9fafb 100%);
            text-align: center;
            border-bottom: 1px solid var(--border-color);
        }

        .hero-badge {
            display: inline-block;
            background-color: var(--primary-light);
            color: var(--primary-dark);
            padding: 6px 16px;
            border-radius: 50px;
            font-size: 0.9rem;
            font-weight: 600;
            margin-bottom: 24px;
            border: 1px solid rgba(16, 185, 129, 0.2);
        }

        .hero-title {
            font-size: 3rem;
            line-height: 1.25;
            color: var(--primary-dark);
            margin-bottom: 24px;
            font-weight: 800;
        }

        .hero-desc {
            font-size: 1.25rem;
            color: var(--text-muted);
            max-width: 800px;
            margin: 0 auto 40px;
        }

        .hero-actions {
            display: flex;
            justify-content: center;
            gap: 20px;
            flex-wrap: wrap;
        }

        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            padding: 14px 28px;
            font-size: 1rem;
            font-weight: 600;
            border-radius: 8px;
            transition: var(--transition);
            cursor: pointer;
        }

        .btn-primary {
            background-color: var(--primary);
            color: #fff;
            box-shadow: 0 4px 14px rgba(16, 185, 129, 0.3);
        }

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

        .btn-secondary {
            background-color: #fff;
            color: var(--text-main);
            border: 1px solid var(--border-color);
            box-shadow: var(--shadow-sm);
        }

        .btn-secondary:hover {
            background-color: var(--bg-light);
            transform: translateY(-2px);
        }

        /* 首页特色统计与徽章数据 */
        .hero-stats {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
            gap: 30px;
            margin-top: 60px;
            background: #fff;
            padding: 30px;
            border-radius: 16px;
            box-shadow: var(--shadow-md);
            border: 1px solid var(--border-color);
        }

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

        .stat-val {
            font-size: 2.2rem;
            font-weight: 800;
            color: var(--primary);
            margin-bottom: 5px;
        }

        .stat-lbl {
            font-size: 0.95rem;
            color: var(--text-muted);
        }

        /* 关于我们与软件介绍 */
        .intro-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 50px;
            align-items: center;
        }

        .intro-content h3 {
            font-size: 1.8rem;
            color: var(--primary-dark);
            margin-bottom: 20px;
        }

        .intro-content p {
            margin-bottom: 20px;
            color: var(--text-muted);
        }

        .feature-bullets {
            list-style: none;
        }

        .feature-bullets li {
            position: relative;
            padding-left: 28px;
            margin-bottom: 12px;
            font-weight: 500;
        }

        .feature-bullets li::before {
            content: "✓";
            position: absolute;
            left: 0;
            color: var(--primary);
            font-weight: bold;
            font-size: 1.1rem;
        }

        /* 服务体系与流程 */
        .services-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
            gap: 30px;
        }

        .service-card {
            background-color: var(--bg-white);
            border: 1px solid var(--border-color);
            padding: 30px;
            border-radius: 12px;
            transition: var(--transition);
        }

        .service-card:hover {
            transform: translateY(-5px);
            box-shadow: var(--shadow-lg);
            border-color: var(--primary);
        }

        .service-icon {
            font-size: 2.5rem;
            margin-bottom: 20px;
            display: inline-block;
        }

        .service-card h4 {
            font-size: 1.25rem;
            color: var(--primary-dark);
            margin-bottom: 12px;
        }

        .service-card p {
            color: var(--text-muted);
            font-size: 0.95rem;
        }

        /* 工作流时间线 */
        .timeline {
            position: relative;
            max-width: 800px;
            margin: 0 auto;
            padding: 20px 0;
        }

        .timeline-item {
            position: relative;
            padding-left: 40px;
            margin-bottom: 40px;
        }

        .timeline-item::before {
            content: '';
            position: absolute;
            left: 15px;
            top: 5px;
            bottom: -45px;
            width: 2px;
            background-color: var(--border-color);
        }

        .timeline-item:last-child::before {
            display: none;
        }

        .timeline-badge {
            position: absolute;
            left: 0;
            top: 0;
            width: 32px;
            height: 32px;
            border-radius: 50%;
            background-color: var(--primary-light);
            color: var(--primary);
            border: 2px solid var(--primary);
            display: flex;
            align-items: center;
            justify-content: center;
            font-weight: bold;
            font-size: 0.9rem;
        }

        .timeline-content h4 {
            font-size: 1.15rem;
            color: var(--primary-dark);
            margin-bottom: 8px;
        }

        .timeline-content p {
            color: var(--text-muted);
            font-size: 0.95rem;
        }

        /* 全行业解决方案与服务网络 */
        .solutions-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(230px, 1fr));
            gap: 24px;
        }

        .solution-card {
            background-color: var(--bg-white);
            border: 1px solid var(--border-color);
            padding: 24px;
            border-radius: 8px;
            text-align: center;
        }

        .solution-card h4 {
            color: var(--primary-dark);
            margin-bottom: 10px;
        }

        .network-section {
            background: linear-gradient(to right, #ecfdf5, #f0fdf4);
            border-radius: 16px;
            padding: 40px;
            margin-top: 50px;
            border: 1px solid rgba(16, 185, 129, 0.1);
        }

        .network-grid {
            display: grid;
            grid-template-columns: 1fr 1.5fr;
            gap: 40px;
            align-items: center;
        }

        .network-list {
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: 15px;
        }

        .network-list-item {
            background-color: #fff;
            padding: 12px;
            border-radius: 6px;
            border: 1px solid var(--border-color);
            font-weight: 500;
            display: flex;
            align-items: center;
            gap: 10px;
        }

        .network-list-item::before {
            content: "●";
            color: var(--primary);
        }

        /* 对比评测表格与技术标准 */
        .comparison-table-wrapper {
            overflow-x: auto;
            background: #fff;
            border-radius: 12px;
            border: 1px solid var(--border-color);
            box-shadow: var(--shadow-md);
            margin-bottom: 40px;
        }

        .comparison-table {
            width: 100%;
            border-collapse: collapse;
            text-align: left;
            min-width: 600px;
        }

        .comparison-table th, .comparison-table td {
            padding: 16px 20px;
            border-bottom: 1px solid var(--border-color);
        }

        .comparison-table th {
            background-color: var(--primary-light);
            color: var(--primary-dark);
            font-weight: 700;
        }

        .comparison-table tr:last-child td {
            border-bottom: none;
        }

        .comparison-table tr.highlight {
            background-color: rgba(16, 185, 129, 0.03);
        }

        .badge-star {
            display: inline-block;
            background-color: #fffbeb;
            color: #d97706;
            padding: 2px 8px;
            border-radius: 4px;
            font-size: 0.85rem;
            font-weight: bold;
            border: 1px solid #fde68a;
        }

        /* 案例展示区与素材应用 */
        .case-gallery {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
            gap: 30px;
        }

        .case-item {
            background: #fff;
            border-radius: 12px;
            overflow: hidden;
            border: 1px solid var(--border-color);
            transition: var(--transition);
        }

        .case-item:hover {
            transform: translateY(-5px);
            box-shadow: var(--shadow-lg);
        }

        .case-img-container {
            width: 100%;
            height: 200px;
            overflow: hidden;
            background-color: #f3f4f6;
            display: flex;
            align-items: center;
            justify-content: center;
        }

        .case-img-container img {
            width: 100%;
            height: 100%;
            object-fit: cover;
        }

        .case-info {
            padding: 20px;
        }

        .case-info h4 {
            font-size: 1.15rem;
            margin-bottom: 8px;
            color: var(--primary-dark);
        }

        .case-info p {
            font-size: 0.9rem;
            color: var(--text-muted);
        }

        /* Token 比价 */
        .token-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
            gap: 20px;
        }

        .token-card {
            background: #fff;
            border: 1px solid var(--border-color);
            border-radius: 12px;
            padding: 24px;
            text-align: center;
            position: relative;
            overflow: hidden;
        }

        .token-card.best::before {
            content: "全网最低";
            position: absolute;
            top: 15px;
            right: -30px;
            background-color: #f59e0b;
            color: #fff;
            font-size: 0.75rem;
            padding: 4px 30px;
            transform: rotate(45deg);
            font-weight: bold;
        }

        .token-price {
            font-size: 1.8rem;
            font-weight: 800;
            color: var(--primary);
            margin: 15px 0;
        }

        /* 培训板块 */
        .training-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
            gap: 20px;
        }

        .training-card {
            background: #fff;
            border: 1px solid var(--border-color);
            border-radius: 8px;
            padding: 24px;
            text-align: center;
            border-top: 4px solid var(--primary);
        }

        .training-card h4 {
            color: var(--primary-dark);
            margin-bottom: 12px;
            font-size: 1.1rem;
        }

        /* 用户评论区 */
        .comments-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
            gap: 24px;
        }

        .comment-card {
            background: #fff;
            border: 1px solid var(--border-color);
            border-radius: 12px;
            padding: 24px;
            position: relative;
            box-shadow: var(--shadow-sm);
        }

        .comment-rating {
            color: #f59e0b;
            margin-bottom: 10px;
        }

        .comment-text {
            font-style: italic;
            color: var(--text-muted);
            margin-bottom: 15px;
            font-size: 0.95rem;
        }

        .comment-user {
            font-weight: bold;
            color: var(--primary-dark);
        }

        .comment-role {
            font-size: 0.85rem;
            color: var(--text-muted);
        }

        /* FAQ 折叠面板 */
        .faq-accordion {
            max-width: 900px;
            margin: 0 auto;
        }

        .faq-item {
            background: #fff;
            border: 1px solid var(--border-color);
            border-radius: 8px;
            margin-bottom: 12px;
            overflow: hidden;
        }

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

        .faq-question:hover {
            background-color: var(--primary-light);
        }

        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.3s cubic-bezier(0, 1, 0, 1);
            background-color: var(--bg-light);
        }

        .faq-answer p {
            padding: 18px 24px;
            color: var(--text-muted);
            font-size: 0.95rem;
            border-top: 1px solid var(--border-color);
        }

        .faq-item.active .faq-answer {
            max-height: 1000px;
            transition: max-height 0.3s cubic-bezier(1, 0, 1, 0);
        }

        .faq-icon::after {
            content: "+";
            font-size: 1.25rem;
            font-weight: bold;
        }

        .faq-item.active .faq-icon::after {
            content: "−";
        }

        /* 自助排查与术语百科 */
        .wiki-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 40px;
        }

        .wiki-card {
            background: #fff;
            padding: 30px;
            border-radius: 12px;
            border: 1px solid var(--border-color);
        }

        .wiki-card h3 {
            margin-bottom: 20px;
            color: var(--primary-dark);
            border-bottom: 2px solid var(--primary-light);
            padding-bottom: 10px;
        }

        .wiki-list {
            list-style: none;
        }

        .wiki-list li {
            margin-bottom: 15px;
        }

        .wiki-list strong {
            color: var(--text-main);
            display: block;
            margin-bottom: 4px;
        }

        .wiki-list span {
            color: var(--text-muted);
            font-size: 0.9rem;
        }

        /* 文章资讯列表 */
        .news-list {
            list-style: none;
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
            gap: 20px;
        }

        .news-card {
            background: #fff;
            border: 1px solid var(--border-color);
            border-radius: 8px;
            padding: 20px;
            transition: var(--transition);
        }

        .news-card:hover {
            border-color: var(--primary);
            box-shadow: var(--shadow-sm);
        }

        .news-card a {
            font-weight: 600;
            color: var(--primary-dark);
            display: block;
            margin-bottom: 10px;
            line-height: 1.4;
        }

        .news-card a:hover {
            color: var(--primary);
        }

        .news-meta {
            font-size: 0.85rem;
            color: var(--text-muted);
        }

        /* 需求匹配与联系我们表单 */
        .contact-layout {
            display: grid;
            grid-template-columns: 1fr 1.2fr;
            gap: 50px;
        }

        .contact-info-panel {
            padding: 30px;
            background-color: var(--primary-light);
            border-radius: 12px;
            border: 1px solid rgba(16, 185, 129, 0.1);
        }

        .contact-info-panel h3 {
            color: var(--primary-dark);
            margin-bottom: 20px;
            font-size: 1.5rem;
        }

        .contact-details {
            margin-bottom: 30px;
        }

        .contact-details p {
            margin-bottom: 12px;
            font-size: 0.95rem;
            display: flex;
            align-items: center;
            gap: 10px;
        }

        .qr-codes {
            display: flex;
            gap: 20px;
            flex-wrap: wrap;
            margin-top: 20px;
        }

        .qr-item {
            text-align: center;
            background: #fff;
            padding: 10px;
            border-radius: 8px;
            border: 1px solid var(--border-color);
        }

        .qr-item img {
            width: 120px;
            height: 120px;
            object-fit: cover;
            display: block;
            margin-bottom: 8px;
        }

        .qr-item span {
            font-size: 0.8rem;
            font-weight: 600;
            color: var(--text-muted);
        }

        .form-card {
            background: #fff;
            padding: 40px;
            border-radius: 12px;
            border: 1px solid var(--border-color);
            box-shadow: var(--shadow-md);
        }

        .form-group {
            margin-bottom: 20px;
        }

        .form-group label {
            display: block;
            margin-bottom: 6px;
            font-weight: 600;
            font-size: 0.9rem;
            color: var(--text-main);
        }

        .form-control {
            width: 100%;
            padding: 12px;
            border: 1px solid var(--border-color);
            border-radius: 6px;
            font-size: 0.95rem;
            outline: none;
            transition: var(--transition);
        }

        .form-control:focus {
            border-color: var(--primary);
            box-shadow: 0 0 0 3px rgba(16, 185, 129, 0.1);
        }

        /* 友情链接与标签云 */
        .footer-links-cloud {
            padding: 30px 0;
            background-color: var(--bg-light);
            border-top: 1px solid var(--border-color);
            text-align: center;
        }

        .footer-links-cloud h4 {
            margin-bottom: 15px;
            font-size: 0.95rem;
            color: var(--text-muted);
        }

        .links-wrap {
            display: flex;
            justify-content: center;
            gap: 15px;
            flex-wrap: wrap;
        }

        .links-wrap a {
            font-size: 0.9rem;
            color: var(--text-muted);
            background: #fff;
            padding: 6px 12px;
            border-radius: 4px;
            border: 1px solid var(--border-color);
        }

        .links-wrap a:hover {
            color: var(--primary);
            border-color: var(--primary);
        }

        /* 页脚 */
        .site-footer {
            background-color: var(--primary-dark);
            color: #fff;
            padding: 50px 0 20px;
            border-top: 1px solid var(--border-color);
        }

        .footer-grid {
            display: grid;
            grid-template-columns: 2fr repeat(2, 1fr);
            gap: 40px;
            margin-bottom: 40px;
        }

        .footer-brand h3 {
            font-size: 1.5rem;
            margin-bottom: 15px;
            color: #fff;
        }

        .footer-brand p {
            color: #a7f3d0;
            font-size: 0.9rem;
            max-width: 400px;
        }

        .footer-menu h4 {
            font-size: 1rem;
            margin-bottom: 15px;
            color: #fff;
            border-left: 3px solid var(--primary);
            padding-left: 10px;
        }

        .footer-menu ul {
            list-style: none;
        }

        .footer-menu ul li {
            margin-bottom: 10px;
        }

        .footer-menu ul a {
            color: #a7f3d0;
            font-size: 0.9rem;
        }

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

        .footer-bottom {
            border-top: 1px solid rgba(255, 255, 255, 0.1);
            padding-top: 20px;
            display: flex;
            justify-content: space-between;
            align-items: center;
            font-size: 0.85rem;
            color: #a7f3d0;
            flex-wrap: wrap;
            gap: 15px;
        }

        /* 浮动客服 */
        .floating-service {
            position: fixed;
            bottom: 30px;
            right: 30px;
            z-index: 999;
            display: flex;
            flex-direction: column;
            gap: 10px;
        }

        .float-btn {
            width: 50px;
            height: 50px;
            border-radius: 50%;
            background-color: var(--primary);
            color: #fff;
            display: flex;
            align-items: center;
            justify-content: center;
            box-shadow: var(--shadow-lg);
            cursor: pointer;
            font-size: 1.25rem;
            position: relative;
            transition: var(--transition);
        }

        .float-btn:hover {
            background-color: var(--primary-hover);
            transform: translateY(-3px);
        }

        .qr-popover {
            position: absolute;
            bottom: 60px;
            right: 0;
            background: #fff;
            padding: 15px;
            border-radius: 8px;
            box-shadow: var(--shadow-lg);
            border: 1px solid var(--border-color);
            display: none;
            text-align: center;
            width: 160px;
        }

        .qr-popover img {
            width: 130px;
            height: 130px;
            object-fit: cover;
        }

        .qr-popover span {
            color: var(--text-main);
            font-size: 0.8rem;
            margin-top: 5px;
            display: block;
        }

        .float-btn:hover .qr-popover {
            display: block;
        }

        /* 响应式调整 */
        @media (max-width: 992px) {
            .intro-grid, .contact-layout, .wiki-grid {
                grid-template-columns: 1fr;
                gap: 30px;
            }
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 30px;
            }
            .nav-links {
                display: none;
                flex-direction: column;
                position: absolute;
                top: 70px;
                left: 0;
                right: 0;
                background-color: #fff;
                border-bottom: 1px solid var(--border-color);
                padding: 20px;
                box-shadow: var(--shadow-md);
            }
            .nav-links.active {
                display: flex;
            }
            .menu-toggle {
                display: block;
            }
            .hero-title {
                font-size: 2.2rem;
            }
        }