:root {
            --primary: #00E676;
            --primary-dark: #00C853;
            --primary-light: #E8F5E9;
            --dark: #121A16;
            --text-main: #2C3E35;
            --text-muted: #607D8B;
            --bg-light: #F4F9F6;
            --bg-white: #FFFFFF;
            --border-color: #E0EBE5;
            --shadow: 0 10px 30px rgba(0, 230, 118, 0.08);
            --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
        }

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

        html {
            scroll-behavior: smooth;
            font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
            color: var(--text-main);
            background-color: var(--bg-light);
        }

        body {
            line-height: 1.6;
            overflow-x: hidden;
        }

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

        /* 顶部导航 */
        header {
            background: rgba(255, 255, 255, 0.95);
            backdrop-filter: blur(10px);
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            z-index: 1000;
            border-bottom: 1px solid var(--border-color);
            box-shadow: 0 2px 20px rgba(0,0,0,0.02);
        }

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

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

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

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

        .nav-menu a {
            text-decoration: none;
            color: var(--text-main);
            font-size: 14px;
            font-weight: 500;
            transition: var(--transition);
        }

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

        .nav-btn {
            background: var(--primary);
            color: var(--dark) !important;
            padding: 8px 16px;
            border-radius: 6px;
            font-weight: 600 !important;
            transition: var(--transition);
        }

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

        .menu-toggle {
            display: none;
            flex-direction: column;
            gap: 6px;
            cursor: pointer;
        }

        .menu-toggle span {
            width: 24px;
            height: 2px;
            background: var(--dark);
            transition: var(--transition);
        }

        /* Hero 首屏 (无图片) */
        .hero {
            padding: 160px 0 100px;
            background: linear-gradient(135deg, var(--bg-white) 0%, var(--primary-light) 100%);
            position: relative;
            overflow: hidden;
            text-align: center;
        }

        .hero::before {
            content: '';
            position: absolute;
            top: -10%;
            left: -10%;
            width: 40%;
            height: 40%;
            background: radial-gradient(circle, rgba(0,230,118,0.15) 0%, transparent 80%);
            pointer-events: none;
        }

        .hero-tag {
            display: inline-block;
            padding: 6px 16px;
            background: var(--bg-white);
            border: 1px solid var(--primary);
            color: var(--primary-dark);
            border-radius: 50px;
            font-size: 14px;
            font-weight: 600;
            margin-bottom: 24px;
            box-shadow: var(--shadow);
        }

        .hero h1 {
            font-size: 44px;
            line-height: 1.25;
            color: var(--dark);
            margin-bottom: 24px;
            font-weight: 800;
        }

        .hero p {
            font-size: 18px;
            color: var(--text-muted);
            max-width: 800px;
            margin: 0 auto 40px;
        }

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

        .btn-primary {
            background: var(--primary);
            color: var(--dark);
            text-decoration: none;
            padding: 14px 32px;
            border-radius: 8px;
            font-weight: 600;
            font-size: 16px;
            box-shadow: 0 4px 15px rgba(0, 230, 118, 0.3);
            transition: var(--transition);
        }

        .btn-primary:hover {
            background: var(--primary-dark);
            transform: translateY(-2px);
            box-shadow: 0 6px 20px rgba(0, 230, 118, 0.4);
        }

        .btn-secondary {
            background: var(--bg-white);
            color: var(--text-main);
            text-decoration: none;
            padding: 14px 32px;
            border-radius: 8px;
            font-weight: 600;
            font-size: 16px;
            border: 1px solid var(--border-color);
            transition: var(--transition);
        }

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

        /* 标签云 */
        .tags-cloud {
            margin-top: 50px;
            display: flex;
            justify-content: center;
            gap: 10px;
            flex-wrap: wrap;
            max-width: 900px;
            margin-left: auto;
            margin-right: auto;
        }

        .tag-item {
            background: rgba(255,255,255,0.7);
            border: 1px solid var(--border-color);
            padding: 4px 12px;
            border-radius: 4px;
            font-size: 12px;
            color: var(--text-main);
        }

        /* 通用 Section 样式 */
        section {
            padding: 90px 0;
            border-bottom: 1px solid var(--border-color);
        }

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

        .section-title {
            text-align: center;
            margin-bottom: 60px;
        }

        .section-title h2 {
            font-size: 32px;
            color: var(--dark);
            margin-bottom: 16px;
            position: relative;
            display: inline-block;
        }

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

        .section-title p {
            color: var(--text-muted);
            font-size: 16px;
        }

        /* 数据指标卡片 */
        .stats-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 24px;
        }

        .stat-card {
            background: var(--bg-light);
            padding: 30px 24px;
            border-radius: 12px;
            text-align: center;
            border: 1px solid var(--border-color);
            transition: var(--transition);
        }

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

        .stat-num {
            font-size: 40px;
            font-weight: 800;
            color: var(--primary-dark);
            margin-bottom: 8px;
        }

        .stat-label {
            font-size: 16px;
            color: var(--text-main);
            font-weight: 600;
        }

        .stat-desc {
            font-size: 13px;
            color: var(--text-muted);
            margin-top: 4px;
        }

        /* 关于我们 & 平台介绍 */
        .about-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 50px;
            align-items: center;
        }

        .about-content h3 {
            font-size: 24px;
            margin-bottom: 16px;
            color: var(--dark);
        }

        .about-content p {
            margin-bottom: 20px;
            color: var(--text-main);
            font-size: 15px;
        }

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

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

        .feature-list li::before {
            content: '✓';
            position: absolute;
            left: 0;
            color: var(--primary-dark);
            font-weight: bold;
            font-size: 18px;
        }

        /* 统一卡片容器 */
        .cards-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 30px;
        }

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

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

        .card-icon {
            font-size: 32px;
            margin-bottom: 20px;
            color: var(--primary-dark);
        }

        .card h3 {
            font-size: 20px;
            margin-bottom: 12px;
            color: var(--dark);
        }

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

        /* 对比评测板块 */
        .evaluation-box {
            background: var(--bg-white);
            border: 2px solid var(--primary);
            border-radius: 16px;
            padding: 40px;
            box-shadow: var(--shadow);
        }

        .eval-header {
            display: flex;
            justify-content: space-between;
            align-items: center;
            border-bottom: 1px solid var(--border-color);
            padding-bottom: 24px;
            margin-bottom: 30px;
            flex-wrap: wrap;
            gap: 20px;
        }

        .eval-rating {
            display: flex;
            align-items: center;
            gap: 15px;
        }

        .rating-stars {
            color: #FFB300;
            font-size: 24px;
        }

        .rating-score {
            font-size: 28px;
            font-weight: 800;
            color: var(--dark);
        }

        .rating-score span {
            color: var(--text-muted);
            font-size: 16px;
        }

        .table-responsive {
            width: 100%;
            overflow-x: auto;
        }

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

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

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

        .compare-table td strong {
            color: var(--primary-dark);
        }

        /* 案例展示 */
        .case-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 30px;
        }

        .case-card {
            background: var(--bg-white);
            border-radius: 12px;
            overflow: hidden;
            border: 1px solid var(--border-color);
        }

        .case-img-container {
            width: 100%;
            aspect-ratio: 4/3;
            background: #EAEAEA;
            overflow: hidden;
            display: flex;
            align-items: center;
            justify-content: center;
        }

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

        .case-card:hover .case-img-container img {
            transform: scale(1.05);
        }

        .case-info {
            padding: 24px;
        }

        .case-info h3 {
            font-size: 18px;
            margin-bottom: 8px;
            color: var(--dark);
        }

        .case-info p {
            font-size: 14px;
            color: var(--text-muted);
        }

        /* 步骤流程 */
        .steps-container {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 24px;
            position: relative;
        }

        .step-item {
            background: var(--bg-white);
            padding: 30px 20px;
            border-radius: 12px;
            border: 1px solid var(--border-color);
            text-align: center;
            position: relative;
        }

        .step-num {
            width: 40px;
            height: 40px;
            background: var(--primary);
            color: var(--dark);
            display: flex;
            align-items: center;
            justify-content: center;
            border-radius: 50%;
            margin: 0 auto 20px;
            font-weight: 700;
        }

        /* 服务网络 & 代理加盟 */
        .network-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 50px;
            align-items: center;
        }

        /* 价格参考表格 */
        .price-table-container {
            background: var(--bg-white);
            border-radius: 12px;
            padding: 30px;
            border: 1px solid var(--border-color);
        }

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

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

        .faq-quest {
            padding: 20px;
            font-weight: 600;
            color: var(--dark);
            cursor: pointer;
            display: flex;
            justify-content: space-between;
            align-items: center;
            transition: var(--transition);
        }

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

        .faq-ans {
            padding: 0 20px;
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.3s ease-out, padding 0.3s ease-out;
            color: var(--text-muted);
            font-size: 14px;
            border-top: 0 solid var(--border-color);
        }

        .faq-item.active .faq-ans {
            padding: 20px;
            max-height: 300px;
            border-top: 1px solid var(--border-color);
        }

        .faq-quest::after {
            content: '+';
            font-size: 20px;
            transition: var(--transition);
        }

        .faq-item.active .faq-quest::after {
            transform: rotate(45deg);
        }

        /* 用户评论 */
        .reviews-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 30px;
        }

        .review-card {
            background: var(--bg-white);
            border: 1px solid var(--border-color);
            border-radius: 12px;
            padding: 24px;
            position: relative;
        }

        .review-text {
            font-style: italic;
            font-size: 14px;
            color: var(--text-main);
            margin-bottom: 20px;
        }

        .review-author {
            display: flex;
            align-items: center;
            gap: 12px;
        }

        .author-info h4 {
            font-size: 15px;
            color: var(--dark);
        }

        .author-info span {
            font-size: 12px;
            color: var(--text-muted);
        }

        /* 需求匹配表单 & 联系我们 */
        .contact-grid {
            display: grid;
            grid-template-columns: 1.2fr 0.8fr;
            gap: 40px;
        }

        .form-container {
            background: var(--bg-white);
            border-radius: 12px;
            padding: 40px;
            border: 1px solid var(--border-color);
            box-shadow: var(--shadow);
        }

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

        .form-group label {
            display: block;
            margin-bottom: 8px;
            font-weight: 600;
            font-size: 14px;
            color: var(--dark);
        }

        .form-control {
            width: 100%;
            padding: 12px;
            border: 1px solid var(--border-color);
            border-radius: 6px;
            font-size: 14px;
            transition: var(--transition);
        }

        .form-control:focus {
            outline: none;
            border-color: var(--primary);
            box-shadow: 0 0 0 3px rgba(0, 230, 118, 0.15);
        }

        .contact-info-box {
            background: var(--dark);
            color: var(--bg-white);
            border-radius: 12px;
            padding: 40px;
            display: flex;
            flex-direction: column;
            justify-content: space-between;
        }

        .contact-info-box h3 {
            font-size: 22px;
            color: var(--primary);
            margin-bottom: 24px;
        }

        .info-item {
            margin-bottom: 20px;
            display: flex;
            align-items: flex-start;
            gap: 12px;
            font-size: 14px;
        }

        .info-item strong {
            color: var(--primary);
        }

        .qr-code {
            margin-top: 20px;
            text-align: center;
            background: rgba(255,255,255,0.05);
            padding: 20px;
            border-radius: 8px;
        }

        .qr-code img {
            max-width: 120px;
            height: auto;
            border-radius: 4px;
        }

        /* 资讯 & 知识库 */
        .news-list {
            display: flex;
            flex-direction: column;
            gap: 16px;
            max-width: 800px;
            margin: 0 auto;
        }

        .news-item {
            background: var(--bg-white);
            padding: 20px;
            border-radius: 8px;
            border: 1px solid var(--border-color);
            display: flex;
            justify-content: space-between;
            align-items: center;
            text-decoration: none;
            color: var(--text-main);
            transition: var(--transition);
        }

        .news-item:hover {
            border-color: var(--primary);
            transform: translateX(5px);
        }

        .news-item span {
            font-size: 12px;
            color: var(--text-muted);
        }

        /* 底部与友情链接 */
        footer {
            background: var(--dark);
            color: rgba(255, 255, 255, 0.7);
            padding: 60px 0 30px;
            font-size: 14px;
        }

        .footer-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 40px;
            margin-bottom: 40px;
            border-bottom: 1px solid rgba(255,255,255,0.1);
            padding-bottom: 40px;
        }

        .footer-logo {
            
        }

        .footer-col h4 {
            color: var(--bg-white);
            font-size: 16px;
            margin-bottom: 20px;
            position: relative;
        }

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

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

        .footer-col ul li a {
            color: rgba(255,255,255,0.7);
            text-decoration: none;
            transition: var(--transition);
        }

        .footer-col ul li a:hover {
            color: var(--primary);
        }

        .friend-links {
            margin-top: 20px;
            line-height: 2;
        }

        .friend-links a {
            color: rgba(255,255,255,0.7);
            text-decoration: none;
            margin-right: 15px;
            font-size: 13px;
            display: inline-block;
            transition: var(--transition);
        }

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

        .footer-bottom {
            display: flex;
            justify-content: space-between;
            align-items: center;
            flex-wrap: wrap;
            gap: 15px;
            padding-top: 20px;
        }

        /* 浮动客服 */
        .float-service {
            position: fixed;
            right: 24px;
            bottom: 24px;
            z-index: 999;
            background: var(--primary);
            color: var(--dark);
            width: 56px;
            height: 56px;
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            box-shadow: 0 4px 20px rgba(0,230,118,0.4);
            cursor: pointer;
            transition: var(--transition);
        }

        .float-service:hover {
            transform: scale(1.1);
        }

        .float-panel {
            position: fixed;
            right: 24px;
            bottom: 90px;
            background: var(--bg-white);
            border: 1px solid var(--border-color);
            border-radius: 12px;
            padding: 20px;
            box-shadow: var(--shadow);
            display: none;
            width: 240px;
            z-index: 999;
            text-align: center;
        }

        .float-panel.active {
            display: block;
        }

        .float-panel img {
            width: 140px;
            height: auto;
            margin-bottom: 10px;
        }

        /* 响应式媒体查询 */
        @media (max-width: 992px) {
            .cards-grid, .stats-grid, .case-grid, .steps-container, .reviews-grid, .footer-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .about-grid, .network-grid, .contact-grid {
                grid-template-columns: 1fr;
                gap: 30px;
            }
        }

        @media (max-width: 768px) {
            .nav-menu {
                display: none;
                flex-direction: column;
                position: absolute;
                top: 72px;
                left: 0;
                right: 0;
                background: var(--bg-white);
                padding: 20px;
                border-bottom: 1px solid var(--border-color);
                box-shadow: 0 10px 20px rgba(0,0,0,0.05);
            }
            .nav-menu.active {
                display: flex;
            }
            .menu-toggle {
                display: flex;
            }
            .hero h1 {
                font-size: 32px;
            }
            .cards-grid, .stats-grid, .case-grid, .steps-container, .reviews-grid, .footer-grid {
                grid-template-columns: 1fr;
            }
        }