/* 基础变量定义 - 撞色艳色风（浅底高饱和碰撞） */
        :root {
            --primary: #6366f1; /* 极光紫蓝 */
            --secondary: #ff007f; /* 艳丽霓虹粉 */
            --accent: #00f0ff; /* 荧光青 */
            --dark: #0f172a; /* 深蓝灰正文 */
            --light: #f8fafc; /* 干净底色 */
            --white: #ffffff;
            --gray-100: #f1f5f9;
            --gray-200: #e2e8f0;
            --gray-600: #475569;
            --shadow-accent: 0 8px 30px rgba(99, 102, 241, 0.15);
            --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
        }

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

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

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

        /* 统一布局容器 */
        .container {
            width: 100%;
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 24px;
        }

        /* 顶部导航 */
        header {
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            background: rgba(255, 255, 255, 0.9);
            backdrop-filter: blur(10px);
            z-index: 1000;
            border-bottom: 2px solid var(--primary);
            box-shadow: 0 4px 20px rgba(0,0,0,0.05);
        }

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

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

        .ai-page-logo {
            height: 40px;
            object-fit: contain;
        }

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

        .nav-menu a {
            text-decoration: none;
            color: var(--dark);
            font-weight: 600;
            font-size: 14px;
            transition: var(--transition);
            padding: 6px 12px;
            border-radius: 4px;
        }

        .nav-menu a:hover {
            color: var(--secondary);
            background: var(--gray-100);
        }

        .nav-btn {
            background: linear-gradient(135deg, var(--primary), var(--secondary));
            color: var(--white) !important;
            border-radius: 30px !important;
            padding: 8px 20px !important;
            box-shadow: 0 4px 15px rgba(255, 0, 127, 0.2);
        }

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

        .nav-toggle span {
            width: 25px;
            height: 3px;
            background: var(--primary);
            border-radius: 2px;
            transition: var(--transition);
        }

        /* 英雄首屏 (纯代码无图设计，炫彩碰撞) */
        .hero-section {
            padding: 160px 0 100px 0;
            background: radial-gradient(circle at 80% 20%, rgba(0, 240, 255, 0.15) 0%, transparent 50%),
                        radial-gradient(circle at 10% 80%, rgba(255, 0, 127, 0.1) 0%, transparent 50%),
                        var(--white);
            position: relative;
            overflow: hidden;
            text-align: center;
        }

        .hero-badge {
            display: inline-block;
            padding: 6px 16px;
            background: linear-gradient(90deg, rgba(99, 102, 241, 0.1), rgba(255, 0, 127, 0.1));
            border-left: 4px solid var(--secondary);
            color: var(--primary);
            font-weight: 700;
            font-size: 14px;
            border-radius: 4px;
            margin-bottom: 24px;
            text-transform: uppercase;
            letter-spacing: 1px;
        }

        .hero-title {
            font-size: 42px;
            font-weight: 900;
            line-height: 1.2;
            margin-bottom: 24px;
            color: var(--dark);
        }

        .hero-title span {
            background: linear-gradient(95deg, var(--primary), var(--secondary));
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
        }

        .hero-desc {
            font-size: 18px;
            color: var(--gray-600);
            max-width: 800px;
            margin: 0 auto 36px auto;
        }

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

        .btn {
            display: inline-block;
            text-decoration: none;
            padding: 14px 32px;
            border-radius: 30px;
            font-weight: 700;
            font-size: 16px;
            transition: var(--transition);
            border: 2px solid transparent;
            cursor: pointer;
        }

        .btn-primary {
            background: linear-gradient(135deg, var(--primary), var(--secondary));
            color: var(--white);
            box-shadow: 0 6px 20px rgba(99, 102, 241, 0.3);
        }

        .btn-primary:hover {
            transform: translateY(-3px);
            box-shadow: 0 8px 25px rgba(255, 0, 127, 0.4);
        }

        .btn-outline {
            border-color: var(--primary);
            color: var(--primary);
            background: transparent;
        }

        .btn-outline:hover {
            background: rgba(99, 102, 241, 0.05);
            transform: translateY(-3px);
        }

        /* 数据指标 */
        .stats-section {
            background: var(--white);
            padding: 40px 0;
            border-top: 1px solid var(--gray-200);
            border-bottom: 1px solid var(--gray-200);
        }

        .stats-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 24px;
            text-align: center;
        }

        .stat-card h3 {
            font-size: 36px;
            font-weight: 900;
            color: var(--secondary);
            margin-bottom: 8px;
        }

        .stat-card p {
            font-size: 14px;
            color: var(--gray-600);
            font-weight: 600;
        }

        /* 板块公共头部 */
        .section-header {
            text-align: center;
            margin-bottom: 50px;
        }

        .section-header h2 {
            font-size: 32px;
            font-weight: 800;
            position: relative;
            display: inline-block;
            padding-bottom: 12px;
            color: var(--dark);
        }

        .section-header h2::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 50%;
            transform: translateX(-50%);
            width: 60px;
            height: 4px;
            background: linear-gradient(90deg, var(--primary), var(--secondary));
            border-radius: 2px;
        }

        .section-header p {
            color: var(--gray-600);
            margin-top: 12px;
            font-size: 16px;
        }

        /* 关于我们与平台介绍 */
        .section-padding {
            padding: 80px 0;
        }

        .about-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 48px;
            align-items: center;
        }

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

        .about-text p {
            margin-bottom: 20px;
            color: var(--gray-600);
        }

        .tag-cloud {
            display: flex;
            flex-wrap: wrap;
            gap: 10px;
            margin-top: 24px;
        }

        .tag-cloud span {
            background: var(--white);
            border: 1px solid var(--gray-200);
            color: var(--dark);
            padding: 6px 12px;
            border-radius: 20px;
            font-size: 13px;
            font-weight: 600;
            transition: var(--transition);
        }

        .tag-cloud span:hover {
            border-color: var(--secondary);
            color: var(--secondary);
            background: rgba(255, 0, 127, 0.05);
        }

        /* 模型聚合展示 */
        .model-marquee {
            background: linear-gradient(90deg, var(--primary), var(--secondary));
            padding: 20px 0;
            overflow: hidden;
            white-space: nowrap;
            position: relative;
        }

        .model-track {
            display: inline-flex;
            gap: 40px;
            animation: marquee 30s linear infinite;
        }

        .model-item {
            color: var(--white);
            font-weight: 900;
            font-size: 20px;
            letter-spacing: 1px;
        }

        @keyframes marquee {
            0% { transform: translateX(0); }
            100% { transform: translateX(-50%); }
        }

        /* 服务能力卡片 */
        .card-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
            gap: 30px;
        }

        .service-card {
            background: var(--white);
            border: 1px solid var(--gray-200);
            border-radius: 16px;
            padding: 30px;
            transition: var(--transition);
            position: relative;
            overflow: hidden;
        }

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

        .service-card:hover {
            transform: translateY(-8px);
            box-shadow: var(--shadow-accent);
            border-color: var(--primary);
        }

        .service-card:hover::before {
            background: var(--secondary);
            width: 6px;
        }

        .icon-box {
            width: 50px;
            height: 50px;
            border-radius: 12px;
            background: rgba(99, 102, 241, 0.1);
            color: var(--primary);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 24px;
            margin-bottom: 20px;
            font-weight: bold;
        }

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

        .service-card p {
            color: var(--gray-600);
            font-size: 14px;
        }

        /* 标准化流程 & 时间线 */
        .timeline {
            position: relative;
            max-width: 800px;
            margin: 0 auto;
            padding: 40px 0;
        }

        .timeline::before {
            content: '';
            position: absolute;
            left: 50%;
            top: 0;
            width: 4px;
            height: 100%;
            background: var(--gray-200);
            transform: translateX(-50%);
        }

        .timeline-item {
            margin-bottom: 40px;
            position: relative;
            width: 50%;
            padding: 0 40px;
        }

        .timeline-item:nth-child(odd) {
            left: 0;
            text-align: right;
        }

        .timeline-item:nth-child(even) {
            left: 50%;
            text-align: left;
        }

        .timeline-badge {
            position: absolute;
            top: 0;
            width: 24px;
            height: 24px;
            background: var(--secondary);
            border: 4px solid var(--white);
            border-radius: 50%;
            z-index: 10;
        }

        .timeline-item:nth-child(odd) .timeline-badge {
            right: -12px;
        }

        .timeline-item:nth-child(even) .timeline-badge {
            left: -12px;
        }

        .timeline-content {
            background: var(--white);
            padding: 20px;
            border-radius: 12px;
            border: 1px solid var(--gray-200);
            box-shadow: 0 4px 10px rgba(0,0,0,0.02);
        }

        .timeline-content h4 {
            color: var(--primary);
            margin-bottom: 8px;
            font-size: 18px;
        }

        /* 对比评测表格 */
        .table-responsive {
            width: 100%;
            overflow-x: auto;
            background: var(--white);
            border-radius: 16px;
            border: 1px solid var(--gray-200);
            box-shadow: var(--shadow-accent);
        }

        .compare-table {
            width: 100%;
            border-collapse: collapse;
            text-align: left;
            min-width: 800px;
        }

        .compare-table th, .compare-table td {
            padding: 16px 24px;
            border-bottom: 1px solid var(--gray-200);
        }

        .compare-table th {
            background: var(--gray-100);
            color: var(--dark);
            font-weight: 800;
        }

        .compare-table tr:hover {
            background: rgba(99, 102, 241, 0.02);
        }

        .highlight-col {
            background: rgba(99, 102, 241, 0.05);
            font-weight: 700;
        }

        .score-badge {
            display: inline-block;
            padding: 4px 12px;
            background: linear-gradient(90deg, var(--secondary), var(--primary));
            color: var(--white);
            font-weight: 900;
            border-radius: 20px;
        }

        /* 案例展示区 */
        .case-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 24px;
        }

        .case-card {
            background: var(--white);
            border-radius: 12px;
            overflow: hidden;
            border: 1px solid var(--gray-200);
            transition: var(--transition);
        }

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

        .case-img-container {
            position: relative;
            background: var(--gray-100);
            overflow: hidden;
            display: flex;
            align-items: center;
            justify-content: center;
        }

        .ai-page-image {
            width: 100%;
            height: 220px;
            object-fit: cover;
            transition: var(--transition);
        }

        .case-card:hover .ai-page-image {
            transform: scale(1.05);
        }

        .case-info {
            padding: 20px;
        }

        .case-tag {
            display: inline-block;
            padding: 2px 8px;
            background: rgba(255, 0, 127, 0.1);
            color: var(--secondary);
            font-size: 12px;
            border-radius: 4px;
            margin-bottom: 10px;
            font-weight: 700;
        }

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

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

        .course-card {
            background: var(--white);
            border: 1px solid var(--gray-200);
            border-top: 4px solid var(--accent);
            border-radius: 8px;
            padding: 24px;
            text-align: center;
            transition: var(--transition);
        }

        .course-card:hover {
            border-top-color: var(--secondary);
            box-shadow: var(--shadow-accent);
            transform: translateY(-3px);
        }

        .course-card h4 {
            margin-bottom: 12px;
            color: var(--dark);
        }

        .course-card p {
            font-size: 13px;
            color: var(--gray-600);
        }

        /* 价格卡片 */
        .price-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 30px;
        }

        .price-card {
            background: var(--white);
            border-radius: 16px;
            border: 1px solid var(--gray-200);
            padding: 40px 30px;
            text-align: center;
            transition: var(--transition);
            position: relative;
        }

        .price-card.popular {
            border: 2px solid var(--primary);
            transform: scale(1.05);
        }

        .price-card.popular::before {
            content: '推荐合作伙伴';
            position: absolute;
            top: -12px;
            left: 50%;
            transform: translateX(-50%);
            background: var(--secondary);
            color: var(--white);
            padding: 4px 16px;
            border-radius: 20px;
            font-size: 12px;
            font-weight: bold;
        }

        .price-card h4 {
            font-size: 20px;
            margin-bottom: 15px;
        }

        .price-num {
            font-size: 36px;
            font-weight: 900;
            color: var(--primary);
            margin-bottom: 20px;
        }

        .price-num span {
            font-size: 14px;
            color: var(--gray-600);
            font-weight: normal;
        }

        .price-list {
            list-style: none;
            margin-bottom: 30px;
            text-align: left;
        }

        .price-list li {
            padding: 8px 0;
            border-bottom: 1px solid var(--gray-100);
            font-size: 14px;
            color: var(--gray-600);
        }

        /* 用户评论 */
        .review-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 24px;
        }

        .review-card {
            background: var(--white);
            border: 1px solid var(--gray-200);
            border-radius: 12px;
            padding: 24px;
            position: relative;
        }

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

        .review-avatar {
            width: 44px;
            height: 44px;
            border-radius: 50%;
            background: linear-gradient(135deg, var(--primary), var(--secondary));
            display: flex;
            align-items: center;
            justify-content: center;
            color: var(--white);
            font-weight: bold;
        }

        .review-user h5 {
            font-size: 15px;
            margin-bottom: 2px;
        }

        .review-user span {
            font-size: 12px;
            color: var(--gray-600);
        }

        .review-text {
            font-size: 14px;
            color: var(--gray-600);
            font-style: italic;
        }

        /* FAQ折叠面板 */
        .faq-container {
            max-width: 800px;
            margin: 0 auto;
        }

        .faq-item {
            background: var(--white);
            border: 1px solid var(--gray-200);
            border-radius: 8px;
            margin-bottom: 12px;
            overflow: hidden;
        }

        .faq-btn {
            width: 100%;
            padding: 18px 24px;
            background: none;
            border: none;
            text-align: left;
            font-size: 16px;
            font-weight: 700;
            color: var(--dark);
            cursor: pointer;
            display: flex;
            justify-content: space-between;
            align-items: center;
            transition: var(--transition);
        }

        .faq-btn:hover {
            color: var(--primary);
        }

        .faq-btn::after {
            content: '+';
            font-size: 20px;
            color: var(--secondary);
            font-weight: bold;
        }

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

        .faq-content {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.3s ease-out;
            padding: 0 24px;
            color: var(--gray-600);
            font-size: 14px;
        }

        .faq-item.active .faq-content {
            padding: 0 24px 18px 24px;
            max-height: 200px;
        }

        /* 文章列表与百科 */
        .news-grid {
            display: grid;
            grid-template-columns: 2fr 1fr;
            gap: 30px;
        }

        .news-list {
            display: flex;
            flex-direction: column;
            gap: 16px;
        }

        .news-item {
            background: var(--white);
            border: 1px solid var(--gray-200);
            border-radius: 8px;
            padding: 20px;
            display: flex;
            justify-content: space-between;
            align-items: center;
            text-decoration: none;
            color: var(--dark);
            transition: var(--transition);
        }

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

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

        .news-date {
            font-size: 12px;
            color: var(--gray-600);
        }

        .wiki-card {
            background: var(--white);
            border: 1px solid var(--gray-200);
            border-radius: 8px;
            padding: 24px;
        }

        .wiki-card h4 {
            margin-bottom: 16px;
            color: var(--primary);
            border-bottom: 2px solid var(--gray-100);
            padding-bottom: 8px;
        }

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

        .wiki-list li {
            font-size: 14px;
            margin-bottom: 12px;
            color: var(--gray-600);
        }

        .wiki-list strong {
            color: var(--dark);
            display: block;
        }

        /* 表单与需求匹配 */
        .form-section {
            background: var(--white);
            border-radius: 20px;
            border: 1px solid var(--gray-200);
            padding: 50px;
            box-shadow: var(--shadow-accent);
        }

        .form-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 40px;
        }

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

        .form-input-group label {
            display: block;
            font-weight: 700;
            margin-bottom: 8px;
            font-size: 14px;
        }

        .form-control {
            width: 100%;
            padding: 12px 16px;
            border: 2px solid var(--gray-200);
            border-radius: 8px;
            font-size: 14px;
            outline: none;
            transition: var(--transition);
        }

        .form-control:focus {
            border-color: var(--primary);
        }

        /* 页脚 */
        footer {
            background: var(--dark);
            color: rgba(255, 255, 255, 0.8);
            padding: 60px 0 30px 0;
            border-top: 4px solid var(--secondary);
        }

        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr 1.5fr;
            gap: 40px;
            margin-bottom: 40px;
        }

        .footer-title {
            color: var(--white);
            font-size: 16px;
            font-weight: 700;
            margin-bottom: 20px;
        }

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

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

        .footer-links a {
            color: rgba(255, 255, 255, 0.6);
            text-decoration: none;
            transition: var(--transition);
        }

        .footer-links a:hover {
            color: var(--accent);
        }

        .footer-contact p {
            margin-bottom: 10px;
            font-size: 14px;
        }

        .footer-qrcode {
            display: flex;
            align-items: center;
            gap: 15px;
        }

        .footer-qrcode img {
            width: 90px;
            height: 90px;
            border-radius: 8px;
            background: white;
            padding: 4px;
        }

        .footer-bottom {
            border-top: 1px solid rgba(255, 255, 255, 0.1);
            padding-top: 30px;
            display: flex;
            justify-content: space-between;
            align-items: center;
            flex-wrap: wrap;
            gap: 20px;
            font-size: 13px;
        }

        .footer-bottom-links a {
            color: rgba(255, 255, 255, 0.5);
            text-decoration: none;
            margin-left: 15px;
        }

        /* 悬浮客服面板 */
        .floating-kefu {
            position: fixed;
            right: 20px;
            bottom: 20px;
            z-index: 999;
            background: var(--white);
            border: 2px solid var(--secondary);
            border-radius: 12px;
            padding: 16px;
            box-shadow: 0 10px 30px rgba(0,0,0,0.15);
            width: 160px;
            text-align: center;
            display: flex;
            flex-direction: column;
            align-items: center;
            gap: 8px;
        }

        .floating-kefu img {
            width: 100px;
            height: 100px;
            border-radius: 4px;
        }

        .floating-kefu p {
            font-size: 12px;
            font-weight: bold;
            color: var(--dark);
        }

        .floating-kefu-close {
            position: absolute;
            top: 4px;
            right: 4px;
            background: none;
            border: none;
            cursor: pointer;
            font-size: 14px;
            color: var(--gray-600);
        }

        /* 响应式调整 */
        @media (max-width: 992px) {
            .stats-grid, .case-grid, .price-grid, .review-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .about-grid, .form-grid, .news-grid {
                grid-template-columns: 1fr;
            }
            .footer-grid {
                grid-template-columns: repeat(2, 1fr);
            }
        }

        @media (max-width: 768px) {
            .nav-menu {
                display: none;
                flex-direction: column;
                position: absolute;
                top: 70px;
                left: 0;
                width: 100%;
                background: var(--white);
                padding: 20px;
                border-bottom: 2px solid var(--primary);
                box-shadow: 0 10px 15px rgba(0,0,0,0.1);
            }
            .nav-menu.active {
                display: flex;
            }
            .nav-toggle {
                display: flex;
            }
            .hero-title {
                font-size: 28px;
            }
            .stats-grid, .case-grid, .price-grid, .review-grid {
                grid-template-columns: 1fr;
            }
            .timeline::before {
                left: 20px;
            }
            .timeline-item {
                width: 100%;
                padding-left: 50px;
                padding-right: 0;
                text-align: left !important;
            }
            .timeline-item:nth-child(even) {
                left: 0;
            }
            .timeline-badge {
                left: 8px !important;
            }
            .form-section {
                padding: 24px;
            }
            .footer-grid {
                grid-template-columns: 1fr;
            }
        }