:root {
            --primary: #6366f1;
            --primary-hover: #4f46e5;
            --accent-pink: #ec4899;
            --accent-cyan: #06b6d4;
            --text-main: #0f172a;
            --text-muted: #475569;
            --bg-base: linear-gradient(135deg, #f5f7ff 0%, #faf5ff 50%, #fff5f8 100%);
            --glass-bg: rgba(255, 255, 255, 0.75);
            --glass-border: rgba(255, 255, 255, 0.5);
            --radius-lg: 16px;
            --radius-md: 8px;
            --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
        }

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

        html {
            scroll-behavior: smooth;
        }

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

        /* 居中容器 */
        .ai-container {
            width: 100%;
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 24px;
        }

        /* 头部导航 */
        header {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            z-index: 1000;
            background: rgba(255, 255, 255, 0.8);
            backdrop-filter: blur(12px);
            border-bottom: 1px solid var(--glass-border);
        }

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

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

        .logo-box img {
            height: 40px;
            width: auto;
        }

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

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

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

        .nav-btn {
            background: linear-gradient(90deg, var(--primary), var(--accent-pink));
            color: #fff !important;
            padding: 8px 16px;
            border-radius: 20px;
            box-shadow: 0 4px 15px rgba(99, 102, 241, 0.2);
        }

        .nav-btn:hover {
            transform: translateY(-2px);
            box-shadow: 0 6px 20px rgba(99, 102, 241, 0.3);
        }

        .menu-toggle {
            display: none;
            flex-direction: column;
            gap: 5px;
            cursor: pointer;
            border: none;
            background: transparent;
        }

        .menu-toggle span {
            width: 25px;
            height: 3px;
            background-color: var(--text-main);
            border-radius: 2px;
            transition: var(--transition);
        }

        /* 主体布局 */
        main {
            padding-top: 72px;
        }

        /* 首屏 Hero - 无图片，镭射幻彩背景动效 */
        .hero-section {
            padding: 100px 0 80px 0;
            text-align: center;
            position: relative;
            overflow: hidden;
        }

        .hero-section::before {
            content: '';
            position: absolute;
            top: -20%;
            left: -10%;
            width: 120%;
            height: 140%;
            background: radial-gradient(circle, rgba(236, 72, 153, 0.1) 0%, rgba(6, 182, 212, 0.1) 50%, rgba(99, 102, 241, 0.1) 100%);
            z-index: -1;
            filter: blur(80px);
            animation: pulseBg 12s infinite alternate;
        }

        @keyframes pulseBg {
            0% { transform: scale(1) translate(0, 0); }
            100% { transform: scale(1.1) translate(2%, 2%); }
        }

        .hero-h1 {
            font-size: 38px;
            font-weight: 800;
            line-height: 1.25;
            margin-bottom: 20px;
            letter-spacing: -0.5px;
        }

        .gradient-text {
            background: linear-gradient(90deg, var(--primary), var(--accent-pink), var(--accent-cyan));
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
        }

        .hero-subtitle {
            font-size: 18px;
            color: var(--text-muted);
            max-width: 800px;
            margin: 0 auto 32px auto;
        }

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

        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            padding: 12px 28px;
            border-radius: var(--radius-lg);
            font-size: 16px;
            font-weight: 600;
            text-decoration: none;
            transition: var(--transition);
            cursor: pointer;
        }

        .btn-primary {
            background: linear-gradient(90deg, var(--primary), var(--accent-pink));
            color: #fff;
            box-shadow: 0 4px 20px rgba(99, 102, 241, 0.3);
            border: none;
        }

        .btn-primary:hover {
            transform: translateY(-2px);
            box-shadow: 0 6px 24px rgba(99, 102, 241, 0.4);
        }

        .btn-secondary {
            background: var(--glass-bg);
            color: var(--text-main);
            border: 1px solid var(--glass-border);
        }

        .btn-secondary:hover {
            background: #fff;
            transform: translateY(-2px);
            box-shadow: 0 4px 15px rgba(0, 0, 0, 0.05);
        }

        /* 基础通用Section样式 */
        section {
            padding: 80px 0;
            border-bottom: 1px solid rgba(0, 0, 0, 0.03);
        }

        .section-header {
            text-align: center;
            margin-bottom: 48px;
        }

        .section-header h2 {
            font-size: 28px;
            font-weight: 700;
            margin-bottom: 12px;
            position: relative;
            display: inline-block;
        }

        .section-header p {
            color: var(--text-muted);
            font-size: 16px;
            max-width: 600px;
            margin: 0 auto;
        }

        /* 数据指标卡片 */
        .stats-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
            gap: 20px;
        }

        .stat-card {
            background: var(--glass-bg);
            border: 1px solid var(--glass-border);
            border-radius: var(--radius-lg);
            padding: 30px 20px;
            text-align: center;
            box-shadow: 0 8px 32px rgba(31, 38, 135, 0.04);
            transition: var(--transition);
        }

        .stat-card:hover {
            transform: translateY(-5px);
            box-shadow: 0 12px 40px rgba(99, 102, 241, 0.1);
        }

        .stat-number {
            font-size: 36px;
            font-weight: 800;
            margin-bottom: 8px;
        }

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

        /* 关于我们与平台介绍 */
        .about-layout {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 40px;
            align-items: center;
        }

        .about-text h3 {
            font-size: 22px;
            margin-bottom: 16px;
        }

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

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

        .about-feature-list li {
            margin-bottom: 12px;
            display: flex;
            align-items: center;
            gap: 10px;
            font-weight: 500;
        }

        .about-feature-list li::before {
            content: "✓";
            color: var(--accent-cyan);
            font-weight: 900;
        }

        .about-visual {
            background: linear-gradient(135deg, rgba(99, 102, 241, 0.1), rgba(236, 72, 153, 0.1));
            border-radius: var(--radius-lg);
            padding: 40px;
            border: 1px solid var(--glass-border);
            display: flex;
            flex-direction: column;
            gap: 20px;
        }

        .info-bar {
            background: #fff;
            padding: 16px;
            border-radius: var(--radius-md);
            box-shadow: 0 4px 12px rgba(0, 0, 0, 0.02);
            border-left: 4px solid var(--primary);
        }

        /* 服务能力与AIGC流程 */
        .service-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
            gap: 24px;
        }

        .service-card {
            background: var(--glass-bg);
            border: 1px solid var(--glass-border);
            border-radius: var(--radius-lg);
            padding: 30px;
            transition: var(--transition);
            box-shadow: 0 4px 20px rgba(0,0,0,0.02);
        }

        .service-card:hover {
            transform: translateY(-4px);
            border-color: rgba(99, 102, 241, 0.3);
            box-shadow: 0 8px 30px rgba(99, 102, 241, 0.08);
        }

        .service-icon {
            font-size: 32px;
            margin-bottom: 20px;
        }

        .service-card h3 {
            font-size: 18px;
            margin-bottom: 12px;
        }

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

        /* 模型聚合标签云 */
        .tag-cloud-wrapper {
            margin-top: 40px;
            background: rgba(255, 255, 255, 0.5);
            padding: 30px;
            border-radius: var(--radius-lg);
            border: 1px solid var(--glass-border);
        }

        .tag-cloud-title {
            text-align: center;
            font-size: 16px;
            font-weight: 600;
            margin-bottom: 20px;
            color: var(--text-muted);
        }

        .tag-cloud {
            display: flex;
            flex-wrap: wrap;
            justify-content: center;
            gap: 10px;
        }

        .tag-cloud span {
            background: #fff;
            padding: 6px 12px;
            border-radius: 20px;
            font-size: 13px;
            font-weight: 500;
            border: 1px solid var(--glass-border);
            transition: var(--transition);
            color: var(--text-muted);
        }

        .tag-cloud span:hover {
            background: var(--primary);
            color: #fff;
            transform: scale(1.05);
        }

        /* 步骤流程 */
        .step-timeline {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
            gap: 24px;
            position: relative;
        }

        .step-card {
            position: relative;
            background: var(--glass-bg);
            border: 1px solid var(--glass-border);
            padding: 30px 24px;
            border-radius: var(--radius-lg);
            text-align: center;
        }

        .step-num {
            width: 40px;
            height: 40px;
            background: linear-gradient(135deg, var(--primary), var(--accent-pink));
            color: #fff;
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            font-weight: 700;
            margin: 0 auto 20px auto;
        }

        /* 评测与比价 */
        .compare-layout {
            display: grid;
            grid-template-columns: 1fr;
            gap: 30px;
        }

        .rating-box {
            background: linear-gradient(135deg, #e0f2fe 0%, #f3e8ff 100%);
            border: 1px solid var(--glass-border);
            border-radius: var(--radius-lg);
            padding: 40px;
            text-align: center;
            margin-bottom: 30px;
        }

        .score {
            font-size: 64px;
            font-weight: 900;
            color: var(--primary);
            line-height: 1;
            margin-bottom: 10px;
        }

        .table-responsive {
            width: 100%;
            overflow-x: auto;
            background: var(--glass-bg);
            border: 1px solid var(--glass-border);
            border-radius: var(--radius-lg);
            box-shadow: 0 4px 20px rgba(0,0,0,0.02);
        }

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

        th, td {
            padding: 16px 24px;
            border-bottom: 1px solid rgba(0,0,0,0.05);
        }

        th {
            background: rgba(99, 102, 241, 0.05);
            font-weight: 600;
        }

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

        /* 案例中心 */
        .case-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
            gap: 24px;
        }

        .case-card {
            background: var(--glass-bg);
            border: 1px solid var(--glass-border);
            border-radius: var(--radius-lg);
            overflow: hidden;
            box-shadow: 0 4px 20px rgba(0,0,0,0.02);
            transition: var(--transition);
        }

        .case-card:hover {
            transform: translateY(-5px);
            box-shadow: 0 10px 30px rgba(0,0,0,0.06);
        }

        .case-img-container {
            width: 100%;
            height: 200px;
            overflow: hidden;
            background: #e2e8f0;
        }

        .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-tag {
            display: inline-block;
            background: rgba(99, 102, 241, 0.1);
            color: var(--primary);
            padding: 4px 10px;
            border-radius: 4px;
            font-size: 12px;
            font-weight: 600;
            margin-bottom: 12px;
        }

        /* 人工智能培训 */
        .training-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
            gap: 24px;
        }

        .training-card {
            background: var(--glass-bg);
            border: 1px solid var(--glass-border);
            border-radius: var(--radius-lg);
            padding: 30px;
            position: relative;
            overflow: hidden;
        }

        .training-card::after {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            width: 4px;
            height: 100%;
            background: linear-gradient(to bottom, var(--primary), var(--accent-pink));
        }

        /* 客户评论 */
        .reviews-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
            gap: 24px;
        }

        .review-card {
            background: var(--glass-bg);
            border: 1px solid var(--glass-border);
            border-radius: var(--radius-lg);
            padding: 30px;
            box-shadow: 0 4px 20px rgba(0,0,0,0.02);
        }

        .review-user {
            display: flex;
            align-items: center;
            gap: 12px;
            margin-bottom: 16px;
        }

        .user-avatar-placeholder {
            width: 48px;
            height: 48px;
            background: linear-gradient(135deg, var(--accent-cyan), var(--primary));
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            color: #fff;
            font-weight: 700;
        }

        .user-info h4 {
            font-size: 15px;
            margin-bottom: 2px;
        }

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

        .review-content {
            font-size: 14px;
            color: var(--text-muted);
            font-style: italic;
        }

        /* FAQ折叠面板 */
        .faq-list {
            display: flex;
            flex-direction: column;
            gap: 16px;
            max-width: 800px;
            margin: 0 auto;
        }

        .faq-item {
            background: var(--glass-bg);
            border: 1px solid var(--glass-border);
            border-radius: var(--radius-lg);
            overflow: hidden;
            transition: var(--transition);
        }

        .faq-question {
            padding: 20px 24px;
            display: flex;
            justify-content: space-between;
            align-items: center;
            cursor: pointer;
            font-weight: 600;
            user-select: none;
        }

        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.3s ease;
            padding: 0 24px;
            color: var(--text-muted);
            font-size: 15px;
        }

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

        .faq-icon::after {
            content: '+';
            font-size: 20px;
            font-weight: 300;
        }

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

        /* 需求表单与联系我们 */
        .contact-layout {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 40px;
            align-items: flex-start;
        }

        .contact-info {
            background: var(--glass-bg);
            border: 1px solid var(--glass-border);
            border-radius: var(--radius-lg);
            padding: 40px;
        }

        .info-item {
            display: flex;
            align-items: center;
            gap: 16px;
            margin-bottom: 24px;
        }

        .info-icon {
            font-size: 24px;
            color: var(--primary);
        }

        .form-box {
            background: var(--glass-bg);
            border: 1px solid var(--glass-border);
            border-radius: var(--radius-lg);
            padding: 40px;
            box-shadow: 0 8px 32px rgba(31, 38, 135, 0.05);
        }

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

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

        .form-control {
            width: 100%;
            padding: 12px 16px;
            border: 1px solid var(--glass-border);
            border-radius: var(--radius-md);
            background: #fff;
            color: var(--text-main);
            font-size: 15px;
            transition: var(--transition);
        }

        .form-control:focus {
            outline: none;
            border-color: var(--primary);
            box-shadow: 0 0 0 3px rgba(99, 102, 241, 0.1);
        }

        /* 资讯 / 知识库 */
        .news-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
            gap: 24px;
        }

        .news-card {
            background: var(--glass-bg);
            border: 1px solid var(--glass-border);
            border-radius: var(--radius-lg);
            padding: 24px;
            transition: var(--transition);
        }

        .news-card:hover {
            transform: translateY(-4px);
        }

        .news-title {
            font-size: 16px;
            font-weight: 700;
            margin-bottom: 12px;
        }

        .news-title a {
            color: var(--text-main);
            text-decoration: none;
        }

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

        /* 页脚 */
        footer {
            background: #0f172a;
            color: #94a3b8;
            padding: 60px 0 30px 0;
            font-size: 14px;
            border-top: 1px solid rgba(255, 255, 255, 0.05);
        }

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

        .footer-col h4 {
            color: #f8fafc;
            font-size: 16px;
            margin-bottom: 20px;
        }

        .footer-links {
            list-style: none;
        }

        .footer-links li {
            margin-bottom: 12px;
        }

        .footer-links a {
            color: #94a3b8;
            text-decoration: none;
            transition: var(--transition);
        }

        .footer-links a:hover {
            color: #f8fafc;
        }

        .footer-qr img {
            width: 100px;
            height: 100px;
            border-radius: 8px;
            background: #fff;
            padding: 5px;
        }

        .footer-bottom {
            border-top: 1px solid rgba(255, 255, 255, 0.05);
            padding-top: 30px;
            display: flex;
            justify-content: space-between;
            align-items: center;
            flex-wrap: wrap;
            gap: 20px;
        }

        .friend-links a {
            color: #94a3b8;
            text-decoration: none;
            margin-right: 15px;
            font-size: 13px;
        }

        .friend-links a:hover {
            color: #f8fafc;
        }

        /* 悬浮客服 */
        .floating-service {
            position: fixed;
            bottom: 30px;
            right: 30px;
            z-index: 999;
            display: flex;
            flex-direction: column;
            gap: 12px;
        }

        .float-btn {
            width: 50px;
            height: 50px;
            border-radius: 50%;
            background: #fff;
            box-shadow: 0 4px 20px rgba(0,0,0,0.1);
            display: flex;
            align-items: center;
            justify-content: center;
            cursor: pointer;
            position: relative;
            transition: var(--transition);
        }

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

        .float-qr-box {
            position: absolute;
            bottom: 60px;
            right: 0;
            background: #fff;
            padding: 15px;
            border-radius: 12px;
            box-shadow: 0 10px 30px rgba(0,0,0,0.15);
            display: none;
            width: 150px;
            text-align: center;
        }

        .float-qr-box img {
            width: 120px;
            height: 120px;
            margin-bottom: 8px;
        }

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

        /* 响应式适配 */
        @media (max-width: 992px) {
            .about-layout, .contact-layout {
                grid-template-columns: 1fr;
            }
        }

        @media (max-width: 768px) {
            .nav-menu {
                display: none;
                flex-direction: column;
                position: absolute;
                top: 72px;
                left: 0;
                right: 0;
                background: rgba(255, 255, 255, 0.95);
                backdrop-filter: blur(12px);
                border-bottom: 1px solid var(--glass-border);
                padding: 20px;
                gap: 15px;
            }

            .nav-menu.show {
                display: flex;
            }

            .menu-toggle {
                display: flex;
            }

            .hero-h1 {
                font-size: 28px;
            }

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