/* 根变量及基础样式 */
        :root {
            --primary: #10b981; /* 荧光绿 */
            --secondary: #06b6d4; /* 荧光青 */
            --accent: #d946ef; /* 荧光紫 */
            --dark: #0f172a;
            --gray-dark: #1e293b;
            --gray-light: #f8fafc;
            --text-main: #334155;
            --text-heading: #0f172a;
            --border-color: #e2e8f0;
            --container-width: 1200px;
        }

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

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

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

        /* 通用容器与排版 */
        .container {
            width: 100%;
            max-width: var(--container-width);
            margin: 0 auto;
            padding: 0 20px;
        }

        section {
            padding: 80px 0;
            position: relative;
        }

        .section-title {
            text-align: center;
            margin-bottom: 50px;
        }

        .section-title h2 {
            font-size: 2.2rem;
            color: var(--text-heading);
            position: relative;
            display: inline-block;
            padding-bottom: 15px;
        }

        .section-title 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-title p {
            color: #64748b;
            margin-top: 15px;
            font-size: 1.1rem;
        }

        /* 炫彩荧光风按钮 */
        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            padding: 12px 30px;
            border-radius: 30px;
            font-weight: 600;
            text-decoration: none;
            transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
            cursor: pointer;
            border: none;
        }

        .btn-primary {
            background: linear-gradient(90deg, var(--primary), var(--secondary));
            color: #ffffff;
            box-shadow: 0 4px 15px rgba(16, 185, 129, 0.3);
        }

        .btn-primary:hover {
            transform: translateY(-2px);
            box-shadow: 0 6px 20px rgba(16, 185, 129, 0.5);
        }

        .btn-secondary {
            background: #ffffff;
            color: var(--text-heading);
            border: 2px solid var(--border-color);
        }

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

        /* 顶部导航 */
        header {
            background: rgba(255, 255, 255, 0.95);
            backdrop-filter: blur(10px);
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            z-index: 1000;
            box-shadow: 0 1px 10px rgba(0, 0, 0, 0.05);
            transition: all 0.3s ease;
        }

        .nav-container {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 80px;
        }

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

        .ai-page-logo {
            height: 45px;
            width: auto;
        }

        .logo-text {
            font-size: 1.4rem;
            font-weight: 800;
            background: linear-gradient(135deg, var(--primary), var(--secondary));
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
        }

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

        .nav-link {
            color: var(--text-main);
            text-decoration: none;
            font-size: 0.95rem;
            font-weight: 500;
            transition: color 0.3s;
        }

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

        .nav-btn-group {
            display: flex;
            align-items: center;
            gap: 15px;
        }

        .nav-toggle {
            display: none;
            background: none;
            border: none;
            font-size: 1.5rem;
            cursor: pointer;
            color: var(--text-heading);
        }

        /* Hero首屏 - 绝无图片 */
        .hero {
            background: radial-gradient(circle at 80% 20%, rgba(6, 182, 212, 0.08) 0%, transparent 50%),
                        radial-gradient(circle at 20% 80%, rgba(217, 70, 239, 0.05) 0%, transparent 50%),
                        #ffffff;
            padding: 160px 0 100px 0;
            text-align: center;
            position: relative;
            overflow: hidden;
        }

        .hero::before {
            content: '';
            position: absolute;
            width: 200px;
            height: 200px;
            background: var(--primary);
            filter: blur(150px);
            opacity: 0.15;
            top: 10%;
            left: 5%;
            pointer-events: none;
        }

        .hero-tag {
            display: inline-block;
            background: rgba(16, 185, 129, 0.1);
            color: var(--primary);
            padding: 6px 16px;
            border-radius: 20px;
            font-size: 0.9rem;
            font-weight: 600;
            margin-bottom: 25px;
            border: 1px solid rgba(16, 185, 129, 0.2);
        }

        .hero h1 {
            font-size: 3rem;
            line-height: 1.25;
            color: var(--text-heading);
            margin-bottom: 25px;
            font-weight: 800;
        }

        .hero h1 span {
            background: linear-gradient(135deg, var(--primary) 0%, var(--secondary) 50%, var(--accent) 100%);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
        }

        .hero p.lead {
            font-size: 1.25rem;
            color: #64748b;
            max-width: 800px;
            margin: 0 auto 40px auto;
        }

        .hero-btns {
            display: flex;
            justify-content: center;
            gap: 20px;
            margin-bottom: 60px;
        }

        /* 数据指标卡片 */
        .stats-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 20px;
            margin-top: 40px;
        }

        .stat-card {
            background: #ffffff;
            padding: 25px 20px;
            border-radius: 16px;
            border: 1px solid var(--border-color);
            box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.05);
            transition: all 0.3s;
            position: relative;
        }

        .stat-card::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 0;
            width: 100%;
            height: 3px;
            background: linear-gradient(90deg, var(--primary), var(--secondary));
            transform: scaleX(0);
            transition: transform 0.3s;
            border-radius: 0 0 16px 16px;
        }

        .stat-card:hover {
            transform: translateY(-5px);
            box-shadow: 0 10px 20px rgba(6, 182, 212, 0.1);
        }

        .stat-card:hover::after {
            transform: scaleX(1);
        }

        .stat-num {
            font-size: 2.2rem;
            font-weight: 800;
            color: var(--secondary);
            margin-bottom: 5px;
        }

        .stat-label {
            font-size: 0.95rem;
            color: #64748b;
            font-weight: 500;
        }

        /* 关于我们 */
        .about {
            background: #ffffff;
        }

        .about-wrapper {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 50px;
            align-items: center;
        }

        .about-content h3 {
            font-size: 1.8rem;
            color: var(--text-heading);
            margin-bottom: 20px;
        }

        .about-content p {
            margin-bottom: 20px;
            color: #475569;
        }

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

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

        .feature-bullets li::before {
            content: "✓";
            position: absolute;
            left: 0;
            color: var(--primary);
            font-weight: 900;
            font-size: 1.2rem;
        }

        /* 平台聚合能力 */
        .platform-cloud {
            background: var(--gray-light);
        }

        .cloud-container {
            background: #ffffff;
            border-radius: 24px;
            padding: 40px;
            border: 1px solid var(--border-color);
            box-shadow: 0 10px 30px rgba(0, 0, 0, 0.02);
        }

        .tag-cloud {
            display: flex;
            flex-wrap: wrap;
            justify-content: center;
            gap: 12px;
        }

        .tag-item {
            background: var(--gray-light);
            color: var(--text-main);
            padding: 8px 18px;
            border-radius: 20px;
            font-size: 0.95rem;
            font-weight: 500;
            border: 1px solid var(--border-color);
            transition: all 0.3s;
        }

        .tag-item:hover {
            background: linear-gradient(135deg, var(--primary), var(--secondary));
            color: #ffffff;
            border-color: transparent;
            transform: scale(1.05);
            box-shadow: 0 4px 12px rgba(16, 185, 129, 0.2);
        }

        .tag-highlight {
            border-color: var(--primary);
            color: var(--primary);
            background: rgba(16, 185, 129, 0.05);
        }

        /* AIGC服务体系 & 流程 */
        .service-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 30px;
        }

        .service-card {
            background: #ffffff;
            padding: 40px 30px;
            border-radius: 20px;
            border: 1px solid var(--border-color);
            transition: all 0.3s;
        }

        .service-card:hover {
            transform: translateY(-8px);
            box-shadow: 0 20px 40px rgba(0, 0, 0, 0.05), 0 1px 3px rgba(16, 185, 129, 0.1);
            border-color: var(--primary);
        }

        .service-icon {
            width: 60px;
            height: 60px;
            border-radius: 16px;
            background: rgba(6, 182, 212, 0.1);
            display: flex;
            align-items: center;
            justify-content: center;
            color: var(--secondary);
            font-size: 1.8rem;
            margin-bottom: 25px;
        }

        .service-card h3 {
            font-size: 1.4rem;
            margin-bottom: 15px;
            color: var(--text-heading);
        }

        .service-card p {
            color: #64748b;
            font-size: 0.95rem;
        }

        /* 流程步骤 */
        .steps {
            background: #ffffff;
        }

        .steps-timeline {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 20px;
            position: relative;
        }

        .step-node {
            text-align: center;
            position: relative;
        }

        .step-num {
            width: 50px;
            height: 50px;
            border-radius: 50%;
            background: linear-gradient(135deg, var(--primary), var(--secondary));
            color: #ffffff;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.25rem;
            font-weight: 800;
            margin: 0 auto 20px auto;
            position: relative;
            z-index: 2;
            box-shadow: 0 4px 10px rgba(16, 185, 129, 0.3);
        }

        .step-node h4 {
            font-size: 1.15rem;
            margin-bottom: 10px;
            color: var(--text-heading);
        }

        .step-node p {
            font-size: 0.9rem;
            color: #64748b;
            padding: 0 15px;
        }

        /* 服务网络 */
        .network {
            background: var(--gray-light);
            text-align: center;
        }

        .network-grid {
            display: grid;
            grid-template-columns: repeat(5, 1fr);
            gap: 20px;
            margin-top: 40px;
        }

        .network-card {
            background: #ffffff;
            padding: 20px;
            border-radius: 12px;
            border: 1px solid var(--border-color);
            font-weight: 600;
            transition: all 0.3s;
        }

        .network-card:hover {
            color: var(--secondary);
            border-color: var(--secondary);
            transform: scale(1.05);
        }

        /* 技术标准 */
        .standards-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 30px;
        }

        .standard-card {
            background: #ffffff;
            padding: 30px;
            border-radius: 16px;
            border-left: 5px solid var(--accent);
            box-shadow: 0 4px 6px rgba(0, 0, 0, 0.02);
        }

        .standard-card h4 {
            font-size: 1.2rem;
            margin-bottom: 10px;
            color: var(--text-heading);
        }

        /* 案例中心 - 含图 */
        .cases {
            background: #ffffff;
        }

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

        .case-card {
            background: var(--gray-light);
            border-radius: 16px;
            overflow: hidden;
            border: 1px solid var(--border-color);
            transition: all 0.3s;
        }

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

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

        .case-img-wrapper img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform 0.5s;
        }

        .case-card:hover .case-img-wrapper img {
            transform: scale(1.08);
        }

        .case-info {
            padding: 20px;
        }

        .case-tag {
            font-size: 0.8rem;
            color: var(--primary);
            font-weight: 700;
            text-transform: uppercase;
            margin-bottom: 10px;
            display: inline-block;
        }

        .case-info h4 {
            font-size: 1.15rem;
            color: var(--text-heading);
            margin-bottom: 10px;
        }

        /* 评测对比 & Token 比价 */
        .table-responsive {
            width: 100%;
            overflow-x: auto;
            border-radius: 16px;
            border: 1px solid var(--border-color);
            background: #ffffff;
            margin-top: 30px;
        }

        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: #f1f5f9;
            color: var(--text-heading);
            font-weight: 700;
        }

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

        .highlight-row {
            background-color: rgba(16, 185, 129, 0.05);
        }

        .badge-star {
            background: linear-gradient(90deg, #f59e0b, #fbbf24);
            color: #ffffff;
            padding: 4px 10px;
            border-radius: 12px;
            font-size: 0.85rem;
            font-weight: 700;
        }

        /* 人工智能培训 */
        .training {
            background: var(--gray-light);
        }

        .training-grid {
            display: grid;
            grid-template-columns: repeat(5, 1fr);
            gap: 20px;
        }

        .train-card {
            background: #ffffff;
            padding: 30px 20px;
            border-radius: 16px;
            border: 1px solid var(--border-color);
            text-align: center;
            transition: all 0.3s;
        }

        .train-card:hover {
            border-color: var(--accent);
            transform: translateY(-5px);
            box-shadow: 0 10px 25px rgba(217, 70, 239, 0.1);
        }

        .train-icon {
            font-size: 2rem;
            color: var(--accent);
            margin-bottom: 15px;
        }

        .train-card h4 {
            font-size: 1.05rem;
            margin-bottom: 10px;
            color: var(--text-heading);
        }

        .train-card p {
            font-size: 0.85rem;
            color: #64748b;
        }

        /* 客户评论 */
        .reviews {
            background: #ffffff;
        }

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

        .review-card {
            background: var(--gray-light);
            padding: 30px;
            border-radius: 20px;
            border: 1px solid var(--border-color);
            position: relative;
        }

        .review-text {
            font-style: italic;
            color: #475569;
            margin-bottom: 20px;
            font-size: 0.95rem;
        }

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

        .user-avatar {
            width: 45px;
            height: 45px;
            border-radius: 50%;
            background: linear-gradient(135deg, var(--secondary), var(--accent));
            color: #ffffff;
            display: flex;
            align-items: center;
            justify-content: center;
            font-weight: 700;
            font-size: 1.1rem;
        }

        .user-info h5 {
            color: var(--text-heading);
            font-size: 0.95rem;
        }

        .user-info span {
            font-size: 0.8rem;
            color: #64748b;
        }

        /* 资讯与百科 */
        .info-section {
            background: var(--gray-light);
        }

        .info-grid {
            display: grid;
            grid-template-columns: 2fr 1fr;
            gap: 40px;
        }

        .articles-list {
            background: #ffffff;
            padding: 30px;
            border-radius: 20px;
            border: 1px solid var(--border-color);
        }

        .article-item {
            padding: 15px 0;
            border-bottom: 1px solid var(--border-color);
            display: flex;
            justify-content: space-between;
            align-items: center;
        }

        .article-item:last-child {
            border-bottom: none;
        }

        .article-title {
            color: var(--text-heading);
            text-decoration: none;
            font-weight: 600;
            transition: color 0.3s;
        }

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

        .article-date {
            font-size: 0.85rem;
            color: #94a3b8;
        }

        .encyclopedia {
            background: #ffffff;
            padding: 30px;
            border-radius: 20px;
            border: 1px solid var(--border-color);
        }

        .encyclopedia h4 {
            margin-bottom: 20px;
            font-size: 1.2rem;
            color: var(--text-heading);
        }

        .wiki-tags {
            display: flex;
            flex-wrap: wrap;
            gap: 10px;
        }

        .wiki-tag {
            background: var(--gray-light);
            padding: 6px 12px;
            border-radius: 6px;
            font-size: 0.85rem;
            color: #475569;
            border: 1px solid var(--border-color);
        }

        /* 常见问题 FAQ & 诊断 */
        .faq {
            background: #ffffff;
        }

        .faq-accordion {
            max-width: 800px;
            margin: 0 auto;
        }

        .faq-item {
            background: var(--gray-light);
            border: 1px solid var(--border-color);
            border-radius: 12px;
            margin-bottom: 15px;
            overflow: hidden;
            transition: all 0.3s;
        }

        .faq-header {
            padding: 20px;
            cursor: pointer;
            display: flex;
            justify-content: space-between;
            align-items: center;
            font-weight: 600;
            color: var(--text-heading);
            user-select: none;
        }

        .faq-header::after {
            content: '+';
            font-size: 1.4rem;
            color: var(--primary);
            transition: transform 0.3s;
        }

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

        .faq-body {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.3s ease-out;
            background: #ffffff;
        }

        .faq-content {
            padding: 20px;
            border-top: 1px solid var(--border-color);
            color: #475569;
            font-size: 0.95rem;
        }

        /* 需求表单与联系我们 */
        .contact {
            background: var(--gray-light);
        }

        .contact-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 50px;
        }

        .form-card {
            background: #ffffff;
            padding: 40px;
            border-radius: 24px;
            border: 1px solid var(--border-color);
            box-shadow: 0 10px 35px rgba(0,0,0,0.03);
        }

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

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

        .form-control {
            width: 100%;
            padding: 12px 16px;
            border: 1px solid var(--border-color);
            border-radius: 10px;
            font-size: 0.95rem;
            outline: none;
            transition: border-color 0.3s;
        }

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

        .contact-info-card {
            background: #ffffff;
            padding: 40px;
            border-radius: 24px;
            border: 1px solid var(--border-color);
            display: flex;
            flex-direction: column;
            justify-content: space-between;
        }

        .qr-section {
            display: flex;
            align-items: center;
            gap: 20px;
            margin-top: 30px;
            padding-top: 30px;
            border-top: 1px solid var(--border-color);
        }

        .qr-code {
            width: 120px;
            height: 120px;
            border: 1px solid var(--border-color);
            border-radius: 12px;
            padding: 5px;
            background: #ffffff;
        }

        .qr-code img {
            width: 100%;
            height: 100%;
            object-fit: contain;
        }

        /* 浮动客服 */
        .sticky-kefu {
            position: fixed;
            right: 20px;
            bottom: 20px;
            z-index: 999;
            background: #ffffff;
            border: 1px solid var(--border-color);
            border-radius: 50%;
            width: 60px;
            height: 60px;
            display: flex;
            align-items: center;
            justify-content: center;
            box-shadow: 0 10px 25px rgba(0,0,0,0.1);
            cursor: pointer;
            transition: all 0.3s;
        }

        .sticky-kefu:hover {
            transform: scale(1.1);
        }

        .kefu-popover {
            position: absolute;
            bottom: 70px;
            right: 0;
            background: #ffffff;
            border: 1px solid var(--border-color);
            border-radius: 12px;
            padding: 15px;
            box-shadow: 0 10px 30px rgba(0,0,0,0.15);
            display: none;
            width: 220px;
            text-align: center;
        }

        .kefu-popover.active {
            display: block;
        }

        .kefu-popover img {
            width: 150px;
            height: 150px;
            margin-bottom: 10px;
        }

        /* 页脚 */
        footer {
            background: var(--dark);
            color: #94a3b8;
            padding: 60px 0 30px 0;
            font-size: 0.9rem;
        }

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

        .footer-logo {
            font-size: 1.5rem;
            font-weight: 800;
            color: #ffffff;
            margin-bottom: 20px;
        }

        .footer-links h5 {
            color: #ffffff;
            margin-bottom: 20px;
            font-size: 1rem;
        }

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

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

        .footer-links ul li a {
            color: #94a3b8;
            text-decoration: none;
            transition: color 0.3s;
        }

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

        .footer-bottom {
            border-top: 1px solid var(--gray-dark);
            padding-top: 30px;
            text-align: center;
            font-size: 0.85rem;
        }

        .footer-bottom a {
            color: #64748b;
            text-decoration: none;
        }

        .footer-bottom a:hover {
            color: #ffffff;
        }

        /* 响应式调整 */
        @media (max-width: 1024px) {
            .stats-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .service-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .steps-timeline {
                grid-template-columns: repeat(2, 1fr);
                gap: 40px;
            }
            .case-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .training-grid {
                grid-template-columns: repeat(3, 1fr);
            }
            .reviews-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .info-grid {
                grid-template-columns: 1fr;
            }
        }

        @media (max-width: 768px) {
            .nav-menu {
                display: none;
                flex-direction: column;
                position: absolute;
                top: 80px;
                left: 0;
                right: 0;
                background: #ffffff;
                padding: 20px;
                border-top: 1px solid var(--border-color);
                box-shadow: 0 10px 15px rgba(0,0,0,0.05);
            }
            .nav-menu.active {
                display: flex;
            }
            .nav-toggle {
                display: block;
            }
            .nav-btn-group {
                display: none;
            }
            .hero h1 {
                font-size: 2.2rem;
            }
            .about-wrapper {
                grid-template-columns: 1fr;
            }
            .network-grid {
                grid-template-columns: repeat(3, 1fr);
            }
            .standards-grid {
                grid-template-columns: 1fr;
            }
            .training-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .contact-grid {
                grid-template-columns: 1fr;
            }
            .footer-grid {
                grid-template-columns: 1fr;
            }
            .stats-grid {
                grid-template-columns: 1fr;
            }
            .service-grid {
                grid-template-columns: 1fr;
            }
            .case-grid {
                grid-template-columns: 1fr;
            }
            .reviews-grid {
                grid-template-columns: 1fr;
            }
        }