/* 斑斓彩调风设计变量 - 高对比浅色底，渐变彩调点缀 */
        :root {
            --bg-color: #f7fafc;
            --container-bg: #ffffff;
            --text-main: #1a202c;
            --text-muted: #4a5568;
            --primary-grad: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
            --rainbow-grad: linear-gradient(90deg, #ff007f, #7f00ff, #00bfff, #00ff7f, #ffdd00, #ff007f);
            --accent-pink: #ff007f;
            --accent-purple: #7f00ff;
            --accent-blue: #00bfff;
            --border-color: #e2e8f0;
            --max-width: 1200px;
            --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
        }

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

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

        /* 统一外层居中容器 */
        .container {
            width: 100%;
            max-width: var(--max-width);
            margin: 0 auto;
            padding: 0 20px;
        }

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

        a:hover {
            color: var(--accent-pink);
        }

        /* 顶部导航 */
        header {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            background: rgba(255, 255, 255, 0.9);
            backdrop-filter: blur(10px);
            border-bottom: 1px solid var(--border-color);
            z-index: 1000;
            box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.05);
        }

        .nav-wrapper {
            display: flex;
            justify-content: space-between;
            align-items: center;
            height: 70px;
        }

        .logo-area {
            display: flex;
            align-items: center;
            gap: 10px;
        }

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

        .brand-name {
            font-size: 20px;
            font-weight: 800;
            background: var(--primary-grad);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
        }

        nav {
            display: flex;
            gap: 20px;
        }

        nav a {
            color: var(--text-muted);
            font-weight: 500;
            font-size: 14px;
        }

        nav a:hover, nav a.active {
            color: var(--accent-purple);
        }

        .menu-toggle {
            display: none;
            background: none;
            border: none;
            font-size: 24px;
            cursor: pointer;
            color: var(--text-main);
        }

        /* 首屏 Hero 区域 - 无背景图、无插图、纯CSS渐变彩调与文字排版 */
        .hero {
            padding: 160px 0 100px 0;
            background: radial-gradient(circle at 10% 20%, rgba(255, 182, 193, 0.15) 0%, rgba(176, 224, 230, 0.15) 90%);
            text-align: center;
            position: relative;
            overflow: hidden;
        }

        .hero::before {
            content: '';
            position: absolute;
            top: -50%;
            left: -50%;
            width: 200%;
            height: 200%;
            background: conic-gradient(from 180deg at 50% 50%, #ff007f 0deg, #7f00ff 120deg, #00bfff 240deg, #ff007f 360deg);
            opacity: 0.05;
            animation: rotateBg 20s linear infinite;
            z-index: 1;
        }

        @keyframes rotateBg {
            100% { transform: rotate(360deg); }
        }

        .hero-content {
            position: relative;
            z-index: 2;
            max-width: 800px;
            margin: 0 auto;
        }

        .badge {
            display: inline-block;
            padding: 6px 16px;
            background: linear-gradient(90deg, rgba(255,0,127,0.1), rgba(127,0,255,0.1));
            border: 1px solid rgba(127,0,255,0.2);
            color: var(--accent-purple);
            border-radius: 50px;
            font-size: 14px;
            font-weight: 600;
            margin-bottom: 20px;
        }

        /* H1 字数在20字内 */
        h1 {
            font-size: 42px;
            line-height: 1.2;
            margin-bottom: 24px;
            font-weight: 800;
            background: linear-gradient(45deg, var(--accent-pink), var(--accent-purple), var(--accent-blue));
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
        }

        .hero-desc {
            font-size: 18px;
            color: var(--text-muted);
            margin-bottom: 40px;
            line-height: 1.6;
        }

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

        /* 醒目访问官网按钮 */
        .btn-primary {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            padding: 14px 32px;
            background: var(--primary-grad);
            color: #fff !important;
            font-weight: 600;
            border-radius: 50px;
            box-shadow: 0 10px 20px rgba(118, 75, 162, 0.3);
            transition: var(--transition);
        }

        .btn-primary:hover {
            transform: translateY(-3px);
            box-shadow: 0 15px 30px rgba(118, 75, 162, 0.4);
        }

        .btn-secondary {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            padding: 14px 32px;
            background: #fff;
            color: var(--text-main);
            border: 2px solid var(--border-color);
            font-weight: 600;
            border-radius: 50px;
            transition: var(--transition);
        }

        .btn-secondary:hover {
            border-color: var(--accent-purple);
            color: var(--accent-purple);
        }

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

        .section-header {
            text-align: center;
            max-width: 700px;
            margin: 0 auto 60px auto;
        }

        .section-header h2 {
            font-size: 32px;
            font-weight: 800;
            margin-bottom: 15px;
            color: var(--text-main);
            position: relative;
            display: inline-block;
        }

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

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

        /* 数据指标卡片 */
        .stats-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
            gap: 25px;
            margin-top: 40px;
        }

        .stat-card {
            background: var(--container-bg);
            border: 1px solid var(--border-color);
            border-radius: 16px;
            padding: 30px;
            text-align: center;
            box-shadow: 0 4px 6px rgba(0,0,0,0.02);
            transition: var(--transition);
            position: relative;
            overflow: hidden;
        }

        .stat-card::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            width: 100%;
            height: 4px;
            background: var(--rainbow-grad);
            opacity: 0;
            transition: var(--transition);
        }

        .stat-card:hover {
            transform: translateY(-5px);
            box-shadow: 0 20px 25px -5px rgba(0, 0, 0, 0.05);
        }

        .stat-card:hover::before {
            opacity: 1;
        }

        .stat-num {
            font-size: 40px;
            font-weight: 800;
            color: var(--accent-purple);
            margin-bottom: 10px;
        }

        .stat-title {
            font-size: 16px;
            color: var(--text-main);
            font-weight: 600;
            margin-bottom: 5px;
        }

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

        /* 服务能力卡片 */
        .grid-3 {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
            gap: 30px;
        }

        .service-card {
            background: var(--container-bg);
            border: 1px solid var(--border-color);
            border-radius: 20px;
            padding: 35px;
            transition: var(--transition);
        }

        .service-card:hover {
            border-color: var(--accent-blue);
            box-shadow: 0 10px 30px rgba(0, 191, 255, 0.15);
            transform: scale(1.02);
        }

        .service-icon {
            width: 60px;
            height: 60px;
            border-radius: 12px;
            background: linear-gradient(135deg, rgba(127,0,255,0.1) 0%, rgba(0,191,255,0.1) 100%);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 28px;
            color: var(--accent-purple);
            margin-bottom: 25px;
        }

        .service-card h3 {
            font-size: 20px;
            margin-bottom: 15px;
            color: var(--text-main);
        }

        .service-list {
            list-style: none;
            margin-top: 15px;
        }

        .service-list li {
            position: relative;
            padding-left: 20px;
            font-size: 14px;
            color: var(--text-muted);
            margin-bottom: 8px;
        }

        .service-list li::before {
            content: '✓';
            position: absolute;
            left: 0;
            color: var(--accent-pink);
            font-weight: bold;
        }

        /* 全行业解决方案 & 服务网络 */
        .solution-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
            gap: 25px;
        }

        .sol-card {
            background: var(--container-bg);
            border: 1px solid var(--border-color);
            border-radius: 16px;
            padding: 25px;
            transition: var(--transition);
        }

        .sol-card:hover {
            box-shadow: 0 10px 20px rgba(0,0,0,0.05);
            border-color: var(--accent-pink);
        }

        .sol-card h4 {
            font-size: 18px;
            margin-bottom: 10px;
            color: var(--text-main);
            display: flex;
            align-items: center;
            gap: 8px;
        }

        .sol-card h4::before {
            content: '';
            width: 6px;
            height: 18px;
            background: var(--accent-pink);
            border-radius: 2px;
            display: inline-block;
        }

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

        /* 流程步骤 */
        .process-flow {
            display: flex;
            justify-content: space-between;
            align-items: flex-start;
            flex-wrap: wrap;
            gap: 20px;
            position: relative;
            margin-top: 40px;
        }

        .process-step {
            flex: 1;
            min-width: 200px;
            text-align: center;
            position: relative;
            padding: 20px;
        }

        .step-num {
            width: 50px;
            height: 50px;
            border-radius: 50%;
            background: var(--primary-grad);
            color: white;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 20px;
            font-weight: 700;
            margin: 0 auto 20px auto;
            box-shadow: 0 4px 10px rgba(118, 75, 162, 0.3);
        }

        .process-step h4 {
            font-size: 18px;
            margin-bottom: 10px;
        }

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

        /* 对比评测板块 */
        .rating-box {
            background: linear-gradient(135deg, rgba(127,0,255,0.05) 0%, rgba(255,0,127,0.05) 100%);
            border: 1px dashed var(--accent-purple);
            border-radius: 16px;
            padding: 30px;
            text-align: center;
            margin-bottom: 40px;
        }

        .rating-stars {
            font-size: 32px;
            color: #ffb800;
            margin-bottom: 10px;
        }

        .rating-score {
            font-size: 48px;
            font-weight: 800;
            color: var(--accent-purple);
        }

        .rating-score span {
            font-size: 20px;
            color: var(--text-muted);
        }

        .compare-table-wrapper {
            overflow-x: auto;
            border: 1px solid var(--border-color);
            border-radius: 12px;
            background: #fff;
        }

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

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

        th {
            background-color: #f8fafc;
            font-weight: 700;
            color: var(--text-main);
        }

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

        .highlight-col {
            background-color: rgba(127,0,255,0.02);
            font-weight: 600;
        }

        /* 案例展示区 */
        .case-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
            gap: 30px;
        }

        .case-card {
            background: #fff;
            border-radius: 16px;
            border: 1px solid var(--border-color);
            overflow: hidden;
            transition: var(--transition);
        }

        .case-card:hover {
            transform: translateY(-5px);
            box-shadow: 0 15px 30px rgba(0,0,0,0.08);
        }

        .case-img-box {
            position: relative;
            aspect-ratio: 16 / 9;
            overflow: hidden;
            background: #e2e8f0;
        }

        .case-img-box.square {
            aspect-ratio: 1 / 1;
        }

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

        .case-info {
            padding: 20px;
        }

        .case-tag {
            display: inline-block;
            padding: 4px 10px;
            background: #edf2f7;
            font-size: 12px;
            color: var(--text-muted);
            border-radius: 4px;
            margin-bottom: 10px;
        }

        .case-info h4 {
            font-size: 18px;
            margin-bottom: 8px;
        }

        /* Token 比价参考云标签 */
        .tags-cloud {
            display: flex;
            flex-wrap: wrap;
            gap: 12px;
            justify-content: center;
            margin-bottom: 40px;
        }

        .tag-item {
            padding: 8px 16px;
            background: #fff;
            border: 1px solid var(--border-color);
            border-radius: 50px;
            font-size: 14px;
            font-weight: 500;
            color: var(--text-muted);
            transition: var(--transition);
            cursor: default;
        }

        .tag-item:hover {
            border-color: var(--accent-purple);
            color: var(--accent-purple);
            transform: translateY(-2px);
        }

        .tag-item.hot {
            background: linear-gradient(90deg, rgba(255,0,127,0.05), rgba(127,0,255,0.05));
            border-color: rgba(127,0,255,0.3);
            color: var(--accent-purple);
            font-weight: bold;
        }

        /* 职业技术培训 & 人工智能培训 */
        .course-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
            gap: 30px;
        }

        .course-card {
            background: #fff;
            border: 1px solid var(--border-color);
            border-radius: 16px;
            padding: 30px;
            position: relative;
            transition: var(--transition);
        }

        .course-card:hover {
            border-color: var(--accent-purple);
            box-shadow: 0 10px 25px rgba(127,0,255,0.08);
        }

        .course-badge {
            position: absolute;
            top: 20px;
            right: 20px;
            background: #e2e8f0;
            font-size: 12px;
            padding: 4px 8px;
            border-radius: 4px;
        }

        .course-card h4 {
            font-size: 20px;
            margin-bottom: 15px;
            color: var(--text-main);
        }

        .course-meta {
            font-size: 14px;
            color: var(--text-muted);
            margin-bottom: 20px;
        }

        /* 常见用户问题 FAQ 折叠面板 */
        .faq-list {
            max-width: 800px;
            margin: 0 auto;
        }

        .faq-item {
            background: #fff;
            border: 1px solid var(--border-color);
            border-radius: 8px;
            margin-bottom: 15px;
            overflow: hidden;
            transition: var(--transition);
        }

        .faq-question {
            padding: 20px;
            width: 100%;
            text-align: left;
            background: none;
            border: none;
            font-size: 16px;
            font-weight: 600;
            color: var(--text-main);
            cursor: pointer;
            display: flex;
            justify-content: space-between;
            align-items: center;
        }

        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.3s ease;
            padding: 0 20px;
            color: var(--text-muted);
            font-size: 15px;
            line-height: 1.6;
        }

        .faq-item.active .faq-answer {
            padding-bottom: 20px;
        }

        .faq-question::after {
            content: '+';
            font-size: 20px;
            color: var(--accent-purple);
            transition: transform 0.3s;
        }

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

        /* 客户评论卡片 */
        .review-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
            gap: 30px;
        }

        .review-card {
            background: #fff;
            border: 1px solid var(--border-color);
            border-radius: 16px;
            padding: 30px;
            box-shadow: 0 4px 6px rgba(0,0,0,0.01);
        }

        .review-text {
            font-size: 15px;
            color: var(--text-muted);
            font-style: italic;
            margin-bottom: 20px;
        }

        .review-user {
            display: flex;
            align-items: center;
            gap: 15px;
        }

        .user-avatar {
            width: 45px;
            height: 45px;
            border-radius: 50%;
            background: var(--rainbow-grad);
            display: flex;
            align-items: center;
            justify-content: center;
            color: #fff;
            font-weight: bold;
        }

        .user-info h5 {
            font-size: 15px;
            font-weight: 600;
        }

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

        /* 表单区域 */
        .form-section {
            background: linear-gradient(135deg, #fdfbfb 0%, #ebedee 100%);
        }

        .form-box {
            max-width: 650px;
            margin: 0 auto;
            background: #fff;
            padding: 40px;
            border-radius: 20px;
            border: 1px solid var(--border-color);
            box-shadow: 0 20px 40px rgba(0,0,0,0.05);
        }

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

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

        .form-control {
            width: 100%;
            padding: 12px 16px;
            border: 1px solid var(--border-color);
            border-radius: 8px;
            font-size: 15px;
            outline: none;
            transition: var(--transition);
        }

        .form-control:focus {
            border-color: var(--accent-purple);
            box-shadow: 0 0 0 3px rgba(127,0,255,0.1);
        }

        /* 行业资讯最新文章 */
        .article-list {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
            gap: 25px;
        }

        .article-card {
            background: #fff;
            border: 1px solid var(--border-color);
            border-radius: 12px;
            padding: 24px;
            transition: var(--transition);
        }

        .article-card:hover {
            transform: translateY(-3px);
            border-color: var(--accent-purple);
        }

        .article-date {
            font-size: 12px;
            color: var(--text-muted);
            margin-bottom: 10px;
        }

        .article-card h4 {
            font-size: 16px;
            margin-bottom: 15px;
            line-height: 1.4;
        }

        /* 联系方式模块 */
        .contact-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
            gap: 40px;
            align-items: center;
        }

        .contact-info-list {
            list-style: none;
        }

        .contact-info-list li {
            margin-bottom: 20px;
            font-size: 16px;
        }

        .contact-info-list strong {
            display: block;
            font-size: 14px;
            color: var(--text-muted);
            margin-bottom: 5px;
        }

        .qr-area {
            text-align: center;
            background: #fff;
            border: 1px solid var(--border-color);
            padding: 30px;
            border-radius: 16px;
            max-width: 250px;
            margin: 0 auto;
        }

        .qr-area img {
            width: 150px;
            height: 150px;
            margin-bottom: 15px;
        }

        /* 浮动客服入口 */
        .floating-kefu {
            position: fixed;
            bottom: 30px;
            right: 30px;
            z-index: 999;
            background: var(--primary-grad);
            color: white;
            padding: 15px 20px;
            border-radius: 50px;
            box-shadow: 0 10px 25px rgba(118, 75, 162, 0.4);
            font-weight: 600;
            display: flex;
            align-items: center;
            gap: 10px;
            cursor: pointer;
            transition: var(--transition);
        }

        .floating-kefu:hover {
            transform: translateY(-5px);
            box-shadow: 0 15px 30px rgba(118, 75, 162, 0.5);
        }

        .kefu-qr-popup {
            display: none;
            position: absolute;
            bottom: 60px;
            right: 0;
            background: #fff;
            border: 1px solid var(--border-color);
            padding: 20px;
            border-radius: 12px;
            box-shadow: 0 10px 30px rgba(0,0,0,0.15);
            text-align: center;
            width: 200px;
            color: var(--text-main);
        }

        .kefu-qr-popup img {
            width: 140px;
            height: 140px;
            margin-bottom: 10px;
        }

        .floating-kefu:hover .kefu-qr-popup {
            display: block;
        }

        /* 友情链接与底部 */
        footer {
            background-color: #1a202c;
            color: #a0aec0;
            padding: 60px 0 30px 0;
            border-top: 1px solid #2d3748;
        }

        .footer-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
            gap: 40px;
            margin-bottom: 40px;
        }

        .footer-col h5 {
            color: #fff;
            font-size: 16px;
            margin-bottom: 20px;
        }

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

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

        .footer-col ul li a {
            color: #a0aec0;
        }

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

        .friend-links {
            border-top: 1px solid #2d3748;
            padding-top: 25px;
            margin-bottom: 25px;
            display: flex;
            flex-wrap: wrap;
            gap: 15px;
            font-size: 14px;
        }

        .friend-links a {
            color: #a0aec0;
        }

        .friend-links a:hover {
            color: #fff;
        }

        .copyright-area {
            border-top: 1px solid #2d3748;
            padding-top: 20px;
            text-align: center;
            font-size: 14px;
        }

        /* 移动端响应式兼容 */
        @media (max-width: 992px) {
            nav {
                display: none;
                position: absolute;
                top: 70px;
                left: 0;
                right: 0;
                background: #fff;
                flex-direction: column;
                padding: 20px;
                border-bottom: 1px solid var(--border-color);
                box-shadow: 0 10px 15px rgba(0,0,0,0.05);
            }
            nav.open {
                display: flex;
            }
            .menu-toggle {
                display: block;
            }
            h1 {
                font-size: 32px;
            }
            .process-flow {
                flex-direction: column;
                align-items: center;
            }
            .process-step {
                width: 100%;
            }
        }