/* 基础变量 - 高饱和艳彩科技风 */
        :root {
            --primary-gradient: linear-gradient(135deg, #7c3aed 0%, #ec4899 50%, #f43f5e 100%);
            --secondary-gradient: linear-gradient(135deg, #06b6d4 0%, #3b82f6 100%);
            --accent-color: #ec4899;
            --text-dark: #0f172a;
            --text-muted: #64748b;
            --bg-light: #f8fafc;
            --bg-white: #ffffff;
            --border-color: #e2e8f0;
            --box-shadow: 0 10px 30px -10px rgba(124, 58, 237, 0.15);
            --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
        }

        /* 重置样式 */
        * {
            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-dark);
            background-color: var(--bg-light);
        }
        body {
            overflow-x: hidden;
            line-height: 1.6;
        }
        a {
            text-decoration: none;
            color: inherit;
            transition: var(--transition);
        }

        /* 统一页面容器 */
        .container {
            width: 100%;
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 20px;
        }

        /* 导航栏 */
        header {
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            background-color: rgba(255, 255, 255, 0.9);
            backdrop-filter: blur(10px);
            border-bottom: 1px solid var(--border-color);
            z-index: 1000;
            transition: var(--transition);
        }
        .nav-wrapper {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 70px;
        }
        .logo-area {
            display: flex;
            align-items: center;
            gap: 10px;
        }
        .ai-page-logo {
            height: 40px;
            width: auto;
        }
        .brand-name {
            font-size: 1.25rem;
            font-weight: 800;
            background: var(--primary-gradient);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
        }
        nav {
            display: flex;
            gap: 20px;
        }
        nav a {
            font-size: 0.9rem;
            font-weight: 500;
            color: var(--text-dark);
        }
        nav a:hover {
            color: var(--accent-color);
        }
        .nav-btn {
            background: var(--primary-gradient);
            color: #fff;
            padding: 8px 20px;
            border-radius: 50px;
            font-size: 0.9rem;
            font-weight: 600;
            box-shadow: var(--box-shadow);
        }
        .nav-btn:hover {
            transform: translateY(-2px);
            box-shadow: 0 15px 30px -5px rgba(236, 72, 153, 0.3);
        }
        .menu-toggle {
            display: none;
            flex-direction: column;
            gap: 6px;
            cursor: pointer;
        }
        .menu-toggle span {
            width: 25px;
            height: 3px;
            background-color: var(--text-dark);
            border-radius: 2px;
            transition: var(--transition);
        }

        /* 移动端菜单激活状态 */
        @media (max-width: 992px) {
            nav {
                display: none;
                position: absolute;
                top: 70px;
                left: 0;
                width: 100%;
                background-color: var(--bg-white);
                flex-direction: column;
                padding: 20px;
                border-bottom: 1px solid var(--border-color);
                box-shadow: var(--box-shadow);
            }
            nav.active {
                display: flex;
            }
            .menu-toggle {
                display: flex;
            }
            .nav-btn {
                text-align: center;
                margin-top: 10px;
            }
        }

        /* 主体内容布局 */
        main {
            margin-top: 70px;
        }

        /* 首屏 Hero 区 (严格不包含图片) */
        .hero-section {
            padding: 100px 0 120px 0;
            background: radial-gradient(circle at 80% 20%, rgba(236, 72, 153, 0.08) 0%, transparent 50%),
                        radial-gradient(circle at 20% 80%, rgba(124, 58, 237, 0.08) 0%, transparent 50%),
                        var(--bg-white);
            position: relative;
            overflow: hidden;
            text-align: center;
        }
        .hero-section::before {
            content: '';
            position: absolute;
            top: -50%;
            left: -50%;
            width: 200%;
            height: 200%;
            background: linear-gradient(45deg, rgba(124, 58, 237, 0.03) 0%, rgba(236, 72, 153, 0.03) 100%);
            animation: rotateBg 20s linear infinite;
            z-index: 1;
            pointer-events: none;
        }
        @keyframes rotateBg {
            0% { transform: rotate(0deg); }
            100% { transform: rotate(360deg); }
        }
        .hero-content {
            position: relative;
            z-index: 2;
            max-width: 800px;
            margin: 0 auto;
        }
        .hero-tag {
            display: inline-block;
            padding: 6px 16px;
            background: rgba(124, 58, 237, 0.1);
            color: #7c3aed;
            font-size: 0.85rem;
            font-weight: 700;
            border-radius: 50px;
            margin-bottom: 24px;
            text-transform: uppercase;
            letter-spacing: 1px;
        }
        h1.hero-title {
            font-size: 2.8rem;
            font-weight: 950;
            line-height: 1.2;
            color: var(--text-dark);
            margin-bottom: 24px;
            letter-spacing: -1px;
        }
        h1.hero-title span {
            background: var(--primary-gradient);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
        }
        .hero-desc {
            font-size: 1.15rem;
            color: var(--text-muted);
            margin-bottom: 40px;
            line-height: 1.8;
        }
        .hero-actions {
            display: flex;
            justify-content: center;
            gap: 20px;
            margin-bottom: 50px;
        }
        .btn-primary {
            background: var(--primary-gradient);
            color: #fff;
            padding: 15px 35px;
            border-radius: 50px;
            font-size: 1rem;
            font-weight: 700;
            box-shadow: 0 10px 25px rgba(236, 72, 153, 0.4);
            border: none;
            cursor: pointer;
            transition: var(--transition);
        }
        .btn-primary:hover {
            transform: translateY(-3px) scale(1.02);
            box-shadow: 0 15px 35px rgba(236, 72, 153, 0.6);
        }
        .btn-secondary {
            background: var(--bg-white);
            color: var(--text-dark);
            padding: 15px 35px;
            border-radius: 50px;
            font-size: 1rem;
            font-weight: 700;
            border: 2px solid var(--border-color);
            cursor: pointer;
            transition: var(--transition);
        }
        .btn-secondary:hover {
            border-color: #7c3aed;
            color: #7c3aed;
            transform: translateY(-3px);
        }

        /* 核心特色卡片(首屏区域下方，不含图片) */
        .hero-stats {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
            gap: 25px;
            margin-top: 50px;
        }
        .stat-card {
            background: rgba(255, 255, 255, 0.8);
            border: 1px solid var(--border-color);
            border-radius: 20px;
            padding: 30px 20px;
            box-shadow: var(--box-shadow);
            transition: var(--transition);
        }
        .stat-card:hover {
            transform: translateY(-5px);
            border-color: rgba(124, 58, 237, 0.3);
        }
        .stat-number {
            font-size: 2.2rem;
            font-weight: 850;
            background: var(--primary-gradient);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            margin-bottom: 8px;
        }
        .stat-label {
            font-size: 0.95rem;
            color: var(--text-dark);
            font-weight: 600;
            margin-bottom: 4px;
        }
        .stat-subtext {
            font-size: 0.8rem;
            color: var(--text-muted);
        }

        /* 通用区块样式 */
        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: 2.2rem;
            font-weight: 900;
            margin-bottom: 15px;
            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(--primary-gradient);
            border-radius: 2px;
        }
        .section-header p {
            font-size: 1rem;
            color: var(--text-muted);
            margin-top: 15px;
        }

        /* 平台聚合与多模型 */
        .platform-logos {
            display: flex;
            flex-wrap: wrap;
            justify-content: center;
            gap: 15px;
            margin-top: 30px;
        }
        .platform-tag {
            background: var(--bg-white);
            border: 1px solid var(--border-color);
            padding: 8px 18px;
            border-radius: 50px;
            font-size: 0.85rem;
            font-weight: 600;
            color: var(--text-dark);
            box-shadow: 0 4px 6px -1px rgba(0,0,0,0.05);
            transition: var(--transition);
        }
        .platform-tag:hover {
            background: var(--primary-gradient);
            color: #fff;
            border-color: transparent;
            transform: scale(1.05);
        }

        /* 服务能力卡片 */
        .services-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
            gap: 30px;
        }
        .service-card {
            background: var(--bg-white);
            border: 1px solid var(--border-color);
            border-radius: 24px;
            padding: 40px 30px;
            box-shadow: var(--box-shadow);
            transition: var(--transition);
            position: relative;
            overflow: hidden;
        }
        .service-card::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            width: 100%;
            height: 5px;
            background: var(--primary-gradient);
            opacity: 0;
            transition: var(--transition);
        }
        .service-card:hover {
            transform: translateY(-8px);
            box-shadow: 0 20px 40px -10px rgba(124, 58, 237, 0.2);
        }
        .service-card:hover::before {
            opacity: 1;
        }
        .service-icon {
            width: 60px;
            height: 60px;
            background: linear-gradient(135deg, rgba(124, 58, 237, 0.1) 0%, rgba(236, 72, 153, 0.1) 100%);
            border-radius: 16px;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.5rem;
            margin-bottom: 25px;
        }
        .service-card h3 {
            font-size: 1.3rem;
            font-weight: 800;
            margin-bottom: 12px;
        }
        .service-card p {
            color: var(--text-muted);
            font-size: 0.95rem;
            line-height: 1.6;
        }

        /* 对比评测表格 */
        .compare-table-wrapper {
            overflow-x: auto;
            border-radius: 20px;
            border: 1px solid var(--border-color);
            box-shadow: var(--box-shadow);
            background: var(--bg-white);
        }
        .compare-table {
            width: 100%;
            border-collapse: collapse;
            text-align: left;
            min-width: 700px;
        }
        .compare-table th, .compare-table td {
            padding: 20px 25px;
            border-bottom: 1px solid var(--border-color);
        }
        .compare-table th {
            background-color: #f1f5f9;
            font-weight: 700;
            color: var(--text-dark);
        }
        .compare-table tr:last-child td {
            border-bottom: none;
        }
        .compare-table .highlight-row {
            background-color: rgba(124, 58, 237, 0.03);
        }
        .compare-table .highlight-cell {
            font-weight: 700;
            color: #7c3aed;
        }
        .rating-badge {
            display: inline-block;
            padding: 4px 10px;
            background: var(--primary-gradient);
            color: #fff;
            font-weight: 800;
            border-radius: 5px;
            font-size: 0.9rem;
        }

        /* 流程步骤与时间线 */
        .process-flow {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
            gap: 25px;
            position: relative;
        }
        .process-step {
            background: var(--bg-white);
            border: 1px solid var(--border-color);
            border-radius: 20px;
            padding: 30px 25px;
            text-align: center;
            box-shadow: 0 4px 6px -1px rgba(0,0,0,0.05);
            transition: var(--transition);
            position: relative;
        }
        .process-step:hover {
            transform: translateY(-5px);
            border-color: var(--accent-color);
        }
        .step-number {
            width: 40px;
            height: 40px;
            background: var(--primary-gradient);
            color: #fff;
            font-weight: 800;
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            margin: 0 auto 20px auto;
        }
        .process-step h4 {
            font-size: 1.1rem;
            font-weight: 700;
            margin-bottom: 10px;
        }
        .process-step p {
            font-size: 0.85rem;
            color: var(--text-muted);
        }

        /* 案例展示 (精美图文混排) */
        .case-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
            gap: 30px;
        }
        .case-card {
            background: var(--bg-white);
            border-radius: 20px;
            overflow: hidden;
            border: 1px solid var(--border-color);
            box-shadow: var(--box-shadow);
            transition: var(--transition);
        }
        .case-card:hover {
            transform: translateY(-8px);
            box-shadow: 0 20px 45px -10px rgba(0, 0, 0, 0.15);
        }
        .case-img-wrapper {
            position: relative;
            width: 100%;
            height: 200px;
            overflow: hidden;
            background-color: #f1f5f9;
        }
        .case-img-wrapper img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: var(--transition);
        }
        .case-card:hover .case-img-wrapper img {
            transform: scale(1.05);
        }
        .case-tag {
            position: absolute;
            top: 15px;
            left: 15px;
            background: var(--secondary-gradient);
            color: #fff;
            font-size: 0.75rem;
            font-weight: 700;
            padding: 4px 12px;
            border-radius: 50px;
        }
        .case-body {
            padding: 25px;
        }
        .case-body h3 {
            font-size: 1.2rem;
            font-weight: 800;
            margin-bottom: 10px;
        }
        .case-body p {
            color: var(--text-muted);
            font-size: 0.9rem;
            line-height: 1.5;
        }

        /* 培训介绍与服务网络 */
        .info-split {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(450px, 1fr));
            gap: 40px;
        }
        @media (max-width: 576px) {
            .info-split {
                grid-template-columns: 1fr;
            }
        }
        .info-box {
            background: var(--bg-white);
            border-radius: 24px;
            padding: 40px;
            border: 1px solid var(--border-color);
            box-shadow: var(--box-shadow);
        }
        .info-box h3 {
            font-size: 1.5rem;
            font-weight: 800;
            margin-bottom: 20px;
        }
        .course-list {
            list-style: none;
            display: flex;
            flex-direction: column;
            gap: 15px;
        }
        .course-item {
            display: flex;
            align-items: center;
            gap: 15px;
            padding: 12px;
            background: var(--bg-light);
            border-radius: 12px;
            border-left: 4px solid #7c3aed;
        }
        .course-title {
            font-weight: 700;
            font-size: 0.95rem;
        }
        .course-badge {
            background: #fff;
            border: 1px solid #7c3aed;
            color: #7c3aed;
            font-size: 0.75rem;
            padding: 2px 8px;
            border-radius: 4px;
            margin-left: auto;
        }

        /* 智能需求匹配与表单 */
        .form-section {
            background: linear-gradient(135deg, rgba(124, 58, 237, 0.05) 0%, rgba(236, 72, 153, 0.05) 100%);
        }
        .form-wrapper {
            max-width: 700px;
            margin: 0 auto;
            background: var(--bg-white);
            padding: 45px;
            border-radius: 24px;
            border: 1px solid var(--border-color);
            box-shadow: 0 20px 40px -15px rgba(0,0,0,0.08);
        }
        .form-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 20px;
        }
        @media (max-width: 576px) {
            .form-grid {
                grid-template-columns: 1fr;
            }
        }
        .form-group {
            display: flex;
            flex-direction: column;
            gap: 8px;
            margin-bottom: 20px;
        }
        .form-group.full-width {
            grid-column: span 2;
        }
        @media (max-width: 576px) {
            .form-group.full-width {
                grid-column: span 1;
            }
        }
        .form-group label {
            font-size: 0.9rem;
            font-weight: 700;
            color: var(--text-dark);
        }
        .form-group input, .form-group select, .form-group textarea {
            padding: 12px 16px;
            border: 1px solid var(--border-color);
            border-radius: 8px;
            font-size: 0.95rem;
            outline: none;
            transition: var(--transition);
        }
        .form-group input:focus, .form-group select:focus, .form-group textarea:focus {
            border-color: #7c3aed;
            box-shadow: 0 0 0 3px rgba(124, 58, 237, 0.15);
        }
        .submit-btn {
            width: 100%;
            background: var(--primary-gradient);
            color: #fff;
            border: none;
            padding: 15px;
            border-radius: 8px;
            font-size: 1rem;
            font-weight: 700;
            cursor: pointer;
            box-shadow: 0 10px 20px rgba(236, 72, 153, 0.3);
            transition: var(--transition);
        }
        .submit-btn:hover {
            transform: translateY(-2px);
            box-shadow: 0 15px 25px rgba(236, 72, 153, 0.4);
        }

        /* 客户评论区 */
        .comments-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
            gap: 30px;
        }
        .comment-card {
            background: var(--bg-white);
            border: 1px solid var(--border-color);
            border-radius: 20px;
            padding: 30px;
            box-shadow: var(--box-shadow);
            display: flex;
            flex-direction: column;
            justify-content: space-between;
        }
        .comment-text {
            font-size: 0.95rem;
            color: var(--text-dark);
            font-style: italic;
            margin-bottom: 20px;
            line-height: 1.7;
        }
        .comment-user {
            display: flex;
            align-items: center;
            gap: 15px;
        }
        .user-avatar {
            width: 45px;
            height: 45px;
            border-radius: 50%;
            background: var(--primary-gradient);
            color: #fff;
            display: flex;
            align-items: center;
            justify-content: center;
            font-weight: 700;
            font-size: 0.95rem;
        }
        .user-info h5 {
            font-size: 0.9rem;
            font-weight: 700;
        }
        .user-info span {
            font-size: 0.75rem;
            color: var(--text-muted);
        }

        /* FAQ 折叠面板 */
        .faq-wrapper {
            max-width: 800px;
            margin: 0 auto;
            display: flex;
            flex-direction: column;
            gap: 15px;
        }
        .faq-item {
            background: var(--bg-white);
            border: 1px solid var(--border-color);
            border-radius: 12px;
            overflow: hidden;
            transition: var(--transition);
        }
        .faq-question {
            padding: 20px;
            font-weight: 700;
            cursor: pointer;
            display: flex;
            justify-content: space-between;
            align-items: center;
            background-color: var(--bg-white);
            user-select: none;
        }
        .faq-question::after {
            content: '+';
            font-size: 1.2rem;
            color: #7c3aed;
            transition: var(--transition);
        }
        .faq-item.active .faq-question::after {
            content: '−';
            transform: rotate(180deg);
        }
        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.3s ease-out;
            background: #fafafa;
        }
        .faq-answer-content {
            padding: 20px;
            font-size: 0.95rem;
            color: var(--text-muted);
            border-top: 1px solid var(--border-color);
            line-height: 1.7;
        }

        /* 百科、排查与资讯 */
        .knowledge-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
            gap: 30px;
        }
        .knowledge-card {
            background: var(--bg-white);
            border-radius: 20px;
            padding: 30px;
            border: 1px solid var(--border-color);
            box-shadow: 0 4px 6px -1px rgba(0,0,0,0.05);
        }
        .knowledge-card h3 {
            font-size: 1.25rem;
            font-weight: 800;
            margin-bottom: 20px;
            border-bottom: 2px solid #f1f5f9;
            padding-bottom: 10px;
        }
        .knowledge-list {
            list-style: none;
            display: flex;
            flex-direction: column;
            gap: 12px;
        }
        .knowledge-list li {
            font-size: 0.9rem;
        }
        .knowledge-list li a {
            color: #7c3aed;
            font-weight: 600;
        }
        .knowledge-list li a:hover {
            text-decoration: underline;
        }

        /* 联系我们 & 二维码 */
        .contact-box {
            display: flex;
            align-items: center;
            justify-content: space-around;
            flex-wrap: wrap;
            gap: 30px;
        }
        .contact-info {
            flex: 1;
            min-width: 300px;
        }
        .contact-item {
            margin-bottom: 18px;
            font-size: 1rem;
        }
        .contact-item strong {
            color: var(--text-dark);
        }
        .qr-area {
            text-align: center;
            background: var(--bg-white);
            padding: 25px;
            border-radius: 20px;
            box-shadow: var(--box-shadow);
            border: 1px solid var(--border-color);
        }
        .qr-area img {
            width: 150px;
            height: 150px;
            margin-bottom: 10px;
            display: block;
        }
        .qr-area span {
            font-size: 0.85rem;
            font-weight: 700;
            color: var(--text-dark);
        }

        /* 页脚 & 友情链接 */
        footer {
            background-color: #0f172a;
            color: #94a3b8;
            padding: 50px 0 20px 0;
            font-size: 0.9rem;
        }
        .footer-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
            gap: 40px;
            margin-bottom: 40px;
        }
        .footer-logo {
            margin-bottom: 15px;
            filter: brightness(0) invert(1);
        }
        .footer-col h4 {
            color: #fff;
            font-size: 1rem;
            font-weight: 700;
            margin-bottom: 20px;
        }
        .footer-links {
            list-style: none;
            display: flex;
            flex-direction: column;
            gap: 10px;
        }
        .footer-links a:hover {
            color: #fff;
        }
        .friendship-links {
            border-top: 1px solid #334155;
            padding-top: 25px;
            margin-top: 25px;
            font-size: 0.8rem;
        }
        .friendship-links p {
            margin-bottom: 10px;
            font-weight: 700;
            color: #cbd5e1;
        }
        .friendship-links-list {
            display: flex;
            flex-wrap: wrap;
            gap: 15px;
        }
        .friendship-links-list a {
            color: #94a3b8;
        }
        .friendship-links-list a:hover {
            color: #fff;
        }
        .copyright {
            border-top: 1px solid #334155;
            padding-top: 20px;
            text-align: center;
            font-size: 0.8rem;
        }

        /* 浮动客服栏 */
        .float-widget {
            position: fixed;
            bottom: 30px;
            right: 30px;
            z-index: 999;
            display: flex;
            flex-direction: column;
            gap: 15px;
        }
        .float-btn {
            width: 50px;
            height: 50px;
            border-radius: 50%;
            background: var(--primary-gradient);
            color: #fff;
            display: flex;
            align-items: center;
            justify-content: center;
            box-shadow: 0 10px 20px rgba(0,0,0,0.2);
            cursor: pointer;
            position: relative;
            transition: var(--transition);
        }
        .float-btn:hover {
            transform: translateY(-3px);
        }
        .float-btn .qr-popup {
            position: absolute;
            bottom: 60px;
            right: 0;
            background: #fff;
            padding: 15px;
            border-radius: 12px;
            box-shadow: var(--box-shadow);
            border: 1px solid var(--border-color);
            display: none;
            text-align: center;
        }
        .float-btn .qr-popup img {
            width: 120px;
            height: 120px;
            margin-bottom: 8px;
        }
        .float-btn .qr-popup span {
            color: var(--text-dark);
            font-size: 0.75rem;
            white-space: nowrap;
        }
        .float-btn:hover .qr-popup {
            display: block;
        }
        .scroll-top-btn {
            background: #0f172a;
        }