:root {
            --primary-color: #E60012;
            --primary-hover: #C5000F;
            --secondary-color: #990011;
            --dark-color: #1A1A1A;
            --light-color: #FFF8F8;
            --gray-color: #F5F5F7;
            --text-color: #333333;
            --border-color: #EAEAEA;
            --max-width: 1200px;
        }

        * {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
            font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, "Noto Sans CJK SC", sans-serif;
            scroll-behavior: smooth;
        }

        body {
            background-color: var(--light-color);
            color: var(--text-color);
            line-height: 1.6;
        }

        /* 统一容器 */
        .container {
            width: 100%;
            max-width: var(--max-width);
            margin: 0 auto;
            padding: 0 20px;
        }

        /* 导航栏 */
        header {
            background: rgba(255, 255, 255, 0.95);
            border-bottom: 2px solid var(--primary-color);
            position: sticky;
            top: 0;
            z-index: 1000;
            box-shadow: 0 2px 10px rgba(0, 0, 0, 0.05);
        }

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

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

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

        nav {
            display: flex;
            align-items: center;
            gap: 20px;
        }

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

        .nav-menu a {
            text-decoration: none;
            color: var(--dark-color);
            font-weight: 500;
            font-size: 14px;
            transition: color 0.3s;
        }

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

        .nav-btn {
            background: var(--primary-color);
            color: white !important;
            padding: 8px 16px;
            border-radius: 4px;
            font-weight: bold;
            transition: background 0.3s;
        }

        .nav-btn:hover {
            background: var(--primary-hover);
        }

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

        .menu-toggle span {
            width: 25px;
            height: 3px;
            background: var(--dark-color);
            border-radius: 2px;
            transition: 0.3s;
        }

        /* Hero首屏 (禁止包含图片) */
        .hero {
            background: linear-gradient(135deg, #1A1A1A 0%, #3A0004 50%, #1A1A1A 100%);
            color: white;
            padding: 100px 0 80px 0;
            text-align: center;
            border-bottom: 8px solid var(--primary-color);
            position: relative;
            overflow: hidden;
        }

        .hero::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            bottom: 0;
            background: radial-gradient(circle, rgba(230,0,18,0.15) 0%, transparent 70%);
            pointer-events: none;
        }

        .hero-badge {
            background: var(--primary-color);
            color: white;
            padding: 6px 16px;
            border-radius: 50px;
            font-size: 14px;
            display: inline-block;
            margin-bottom: 20px;
            font-weight: bold;
            letter-spacing: 1px;
            box-shadow: 0 4px 15px rgba(230, 0, 18, 0.4);
        }

        .hero h1 {
            font-size: 2.5rem;
            margin-bottom: 20px;
            line-height: 1.3;
            color: #FFFFFF;
            text-shadow: 0 2px 10px rgba(0,0,0,0.5);
        }

        .hero-desc {
            font-size: 1.2rem;
            color: #CCCCCC;
            max-width: 800px;
            margin: 0 auto 40px auto;
        }

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

        .btn {
            display: inline-block;
            padding: 12px 30px;
            border-radius: 4px;
            text-decoration: none;
            font-weight: bold;
            font-size: 16px;
            transition: all 0.3s ease;
            cursor: pointer;
        }

        .btn-primary {
            background: var(--primary-color);
            color: white;
            box-shadow: 0 4px 15px rgba(230, 0, 18, 0.3);
        }

        .btn-primary:hover {
            background: var(--primary-hover);
            transform: translateY(-2px);
        }

        .btn-secondary {
            background: transparent;
            color: white;
            border: 2px solid white;
        }

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

        /* 基础公用版块样式 */
        section {
            padding: 80px 0;
            border-bottom: 1px solid var(--border-color);
        }

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

        .section-title h2 {
            font-size: 2rem;
            color: var(--dark-color);
            position: relative;
            display: inline-block;
            padding-bottom: 15px;
        }

        .section-title h2::after {
            content: '';
            width: 60px;
            height: 4px;
            background: var(--primary-color);
            position: absolute;
            bottom: 0;
            left: 50%;
            transform: translateX(-50%);
        }

        .section-title p {
            color: #666;
            margin-top: 15px;
            font-size: 16px;
        }

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

        .stat-card {
            background: white;
            padding: 30px;
            border-radius: 8px;
            text-align: center;
            box-shadow: 0 5px 15px rgba(0,0,0,0.03);
            border-top: 4px solid var(--primary-color);
            transition: transform 0.3s;
        }

        .stat-card:hover {
            transform: translateY(-5px);
        }

        .stat-num {
            font-size: 2.5rem;
            font-weight: bold;
            color: var(--primary-color);
            margin-bottom: 10px;
        }

        .stat-label {
            font-size: 14px;
            color: #666;
            font-weight: bold;
        }

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

        .about-text h3 {
            font-size: 1.5rem;
            color: var(--primary-color);
            margin-bottom: 20px;
        }

        .about-text p {
            margin-bottom: 15px;
            color: #444;
        }

        .about-list {
            list-style: none;
            margin-top: 20px;
        }

        .about-list li {
            margin-bottom: 10px;
            padding-left: 20px;
            position: relative;
        }

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

        .about-image {
            background: white;
            border: 2px solid var(--primary-color);
            border-radius: 8px;
            padding: 10px;
            box-shadow: 0 10px 30px rgba(0,0,0,0.05);
        }

        .about-image img {
            width: 100%;
            height: auto;
            border-radius: 4px;
            display: block;
        }

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

        .service-card {
            background: white;
            padding: 30px;
            border-radius: 8px;
            box-shadow: 0 5px 15px rgba(0,0,0,0.03);
            border: 1px solid var(--border-color);
            transition: all 0.3s;
        }

        .service-card:hover {
            border-color: var(--primary-color);
            transform: translateY(-5px);
            box-shadow: 0 10px 25px rgba(230,0,18,0.05);
        }

        .service-icon {
            font-size: 2rem;
            color: var(--primary-color);
            margin-bottom: 20px;
        }

        .service-card h3 {
            margin-bottom: 15px;
            color: var(--dark-color);
        }

        .service-card p {
            color: #666;
            font-size: 14px;
        }

        /* 标签云 */
        .tag-cloud {
            margin-top: 40px;
            text-align: center;
            background: white;
            padding: 30px;
            border-radius: 8px;
            border: 1px solid var(--border-color);
        }

        .tag-cloud h4 {
            margin-bottom: 20px;
            color: var(--dark-color);
        }

        .tags-wrapper {
            display: flex;
            flex-wrap: wrap;
            justify-content: center;
            gap: 10px;
        }

        .tag-item {
            background: var(--light-color);
            color: var(--secondary-color);
            border: 1px solid rgba(230, 0, 18, 0.2);
            padding: 6px 14px;
            border-radius: 20px;
            font-size: 13px;
            font-weight: 500;
            transition: all 0.3s;
        }

        .tag-item:hover {
            background: var(--primary-color);
            color: white;
            transform: scale(1.05);
        }

        /* 流程步骤 */
        .workflow-timeline {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 20px;
            position: relative;
        }

        .flow-step {
            background: white;
            padding: 30px 20px;
            border-radius: 8px;
            text-align: center;
            box-shadow: 0 5px 15px rgba(0,0,0,0.03);
            border: 1px solid var(--border-color);
            position: relative;
        }

        .flow-step::after {
            content: '→';
            position: absolute;
            right: -15px;
            top: 50%;
            transform: translateY(-50%);
            font-size: 24px;
            color: var(--primary-color);
            z-index: 10;
        }

        .flow-step:last-child::after {
            display: none;
        }

        .step-num {
            width: 40px;
            height: 40px;
            background: var(--primary-color);
            color: white;
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            margin: 0 auto 20px auto;
            font-weight: bold;
        }

        .flow-step h3 {
            font-size: 16px;
            margin-bottom: 10px;
            color: var(--dark-color);
        }

        .flow-step p {
            font-size: 13px;
            color: #666;
        }

        /* 解决方案及网络 */
        .sol-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 40px;
        }

        .sol-card {
            background: white;
            padding: 35px;
            border-radius: 8px;
            border-left: 5px solid var(--primary-color);
            box-shadow: 0 5px 15px rgba(0,0,0,0.03);
        }

        .sol-card h3 {
            margin-bottom: 20px;
            color: var(--dark-color);
        }

        .sol-list {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 15px;
        }

        .sol-list-item {
            padding: 10px;
            background: var(--light-color);
            border-radius: 4px;
            font-size: 14px;
            border: 1px dashed rgba(230,0,18,0.2);
        }

        /* 对比评测 */
        .comparison-wrapper {
            background: white;
            border-radius: 8px;
            padding: 40px;
            box-shadow: 0 5px 20px rgba(0,0,0,0.03);
            border: 1px solid var(--border-color);
        }

        .rating-box {
            display: flex;
            align-items: center;
            justify-content: space-around;
            padding: 20px;
            background: var(--light-color);
            border-radius: 8px;
            margin-bottom: 30px;
            border: 1px solid rgba(230,0,18,0.1);
        }

        .rating-score {
            text-align: center;
        }

        .rating-score .score {
            font-size: 3rem;
            font-weight: bold;
            color: var(--primary-color);
        }

        .rating-stars {
            color: #FFB800;
            font-size: 1.5rem;
            margin-top: 5px;
        }

        .table-responsive {
            width: 100%;
            overflow-x: auto;
        }

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

        th, td {
            padding: 15px;
            border-bottom: 1px solid var(--border-color);
        }

        th {
            background-color: var(--gray-color);
            color: var(--dark-color);
            font-weight: bold;
        }

        tr.highlight-row {
            background-color: rgba(230, 0, 18, 0.03);
        }

        .badge-pro {
            background: var(--primary-color);
            color: white;
            padding: 2px 8px;
            border-radius: 4px;
            font-size: 11px;
        }

        /* Token 比价 */
        .price-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 20px;
        }

        .price-card {
            background: white;
            border-radius: 8px;
            padding: 30px;
            text-align: center;
            border: 1px solid var(--border-color);
            transition: all 0.3s;
        }

        .price-card.featured {
            border: 2px solid var(--primary-color);
            position: relative;
        }

        .price-card.featured::before {
            content: '推荐';
            position: absolute;
            top: 0;
            left: 50%;
            transform: translate(-50%, -50%);
            background: var(--primary-color);
            color: white;
            padding: 2px 12px;
            border-radius: 20px;
            font-size: 12px;
            font-weight: bold;
        }

        .price-value {
            font-size: 2rem;
            font-weight: bold;
            color: var(--primary-color);
            margin: 20px 0;
        }

        .price-features {
            list-style: none;
            padding: 0;
            margin-bottom: 20px;
            font-size: 14px;
            color: #666;
        }

        .price-features li {
            margin-bottom: 10px;
        }

        /* 案例中心 */
        .cases-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 30px;
        }

        .case-card {
            background: white;
            border-radius: 8px;
            overflow: hidden;
            box-shadow: 0 5px 15px rgba(0,0,0,0.03);
            border: 1px solid var(--border-color);
        }

        .case-img {
            width: 100%;
            height: 200px;
            object-fit: cover;
            border-bottom: 1px solid var(--border-color);
        }

        .case-info {
            padding: 20px;
        }

        .case-tag {
            color: var(--primary-color);
            font-size: 12px;
            font-weight: bold;
        }

        .case-title {
            font-size: 16px;
            margin: 10px 0;
            color: var(--dark-color);
        }

        /* 培训版块 */
        .training-grid {
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: 30px;
        }

        .training-card {
            background: white;
            padding: 30px;
            border-radius: 8px;
            border-top: 4px solid var(--primary-color);
            box-shadow: 0 5px 15px rgba(0,0,0,0.03);
        }

        .training-card h3 {
            margin-bottom: 20px;
            color: var(--dark-color);
        }

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

        .course-item {
            padding: 12px;
            border-bottom: 1px dashed var(--border-color);
            display: flex;
            justify-content: space-between;
            align-items: center;
        }

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

        .course-name {
            font-weight: 500;
            font-size: 14px;
        }

        .course-badge {
            background: rgba(230, 0, 18, 0.1);
            color: var(--primary-color);
            padding: 2px 8px;
            border-radius: 4px;
            font-size: 12px;
        }

        /* 用户评论 */
        .testimonials-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 20px;
        }

        .testimonial-card {
            background: white;
            padding: 25px;
            border-radius: 8px;
            box-shadow: 0 5px 15px rgba(0,0,0,0.03);
            border: 1px solid var(--border-color);
            position: relative;
        }

        .testimonial-quote {
            font-size: 14px;
            color: #555;
            margin-bottom: 20px;
            font-style: italic;
        }

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

        .user-avatar {
            width: 40px;
            height: 40px;
            border-radius: 50%;
            background: var(--primary-color);
            color: white;
            display: flex;
            align-items: center;
            justify-content: center;
            font-weight: bold;
            font-size: 14px;
        }

        .user-info h4 {
            font-size: 14px;
            color: var(--dark-color);
        }

        .user-info p {
            font-size: 12px;
            color: #888;
        }

        /* 表单区域 */
        .form-section-wrapper {
            background: white;
            border-radius: 8px;
            padding: 40px;
            max-width: 800px;
            margin: 0 auto;
            box-shadow: 0 5px 20px rgba(0,0,0,0.03);
            border: 2px solid var(--primary-color);
        }

        .lead-form {
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: 20px;
        }

        .form-group {
            display: flex;
            flex-direction: column;
            gap: 8px;
        }

        .form-group.full-width {
            grid-column: span 2;
        }

        .form-group label {
            font-size: 14px;
            font-weight: 500;
            color: var(--dark-color);
        }

        .form-group input, 
        .form-group select, 
        .form-group textarea {
            padding: 10px 15px;
            border: 1px solid var(--border-color);
            border-radius: 4px;
            background: var(--light-color);
            font-size: 14px;
        }

        .form-group input:focus, 
        .form-group select:focus, 
        .form-group textarea:focus {
            outline: none;
            border-color: var(--primary-color);
        }

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

        .faq-item {
            background: white;
            border: 1px solid var(--border-color);
            border-radius: 4px;
            margin-bottom: 15px;
            overflow: hidden;
            transition: all 0.3s;
        }

        .faq-header {
            padding: 15px 20px;
            background: white;
            cursor: pointer;
            display: flex;
            justify-content: space-between;
            align-items: center;
            font-weight: 500;
            color: var(--dark-color);
        }

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

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

        .faq-body {
            padding: 0 20px;
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.3s ease-out, padding 0.3s ease-out;
            color: #666;
            font-size: 14px;
            border-top: 0 solid var(--border-color);
        }

        .faq-item.active .faq-body {
            padding: 15px 20px;
            max-height: 200px;
            border-top: 1px solid var(--border-color);
        }

        /* 自助排查与术语 */
        .help-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 40px;
        }

        .help-box {
            background: white;
            padding: 30px;
            border-radius: 8px;
            box-shadow: 0 5px 15px rgba(0,0,0,0.03);
            border: 1px solid var(--border-color);
        }

        .help-box h3 {
            margin-bottom: 20px;
            color: var(--dark-color);
        }

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

        .help-list li {
            padding: 10px 0;
            border-bottom: 1px solid var(--border-color);
            font-size: 14px;
        }

        .help-list li strong {
            color: var(--primary-color);
        }

        /* 资讯与知识库 */
        .news-list {
            list-style: none;
            max-width: 800px;
            margin: 0 auto;
        }

        .news-item {
            background: white;
            padding: 20px;
            border-radius: 8px;
            margin-bottom: 15px;
            border: 1px solid var(--border-color);
            display: flex;
            justify-content: space-between;
            align-items: center;
            transition: border-color 0.3s;
        }

        .news-item:hover {
            border-color: var(--primary-color);
        }

        .news-title {
            font-weight: 500;
            color: var(--dark-color);
            text-decoration: none;
            font-size: 15px;
        }

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

        .news-date {
            font-size: 13px;
            color: #888;
        }

        /* 联系我们 */
        .contact-content {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 40px;
            align-items: center;
        }

        .contact-info {
            background: white;
            padding: 40px;
            border-radius: 8px;
            box-shadow: 0 5px 15px rgba(0,0,0,0.03);
            border-top: 4px solid var(--primary-color);
        }

        .contact-info h3 {
            margin-bottom: 25px;
            color: var(--dark-color);
        }

        .contact-detail-item {
            margin-bottom: 20px;
            display: flex;
            flex-direction: column;
            gap: 5px;
            font-size: 14px;
        }

        .contact-detail-item strong {
            color: var(--primary-color);
        }

        .contact-qr-wrapper {
            background: white;
            padding: 40px;
            border-radius: 8px;
            box-shadow: 0 5px 15px rgba(0,0,0,0.03);
            text-align: center;
            border: 1px solid var(--border-color);
        }

        .contact-qr-wrapper img {
            max-width: 180px;
            height: auto;
            margin-bottom: 15px;
            border: 1px solid var(--border-color);
            padding: 10px;
            background: white;
        }

        /* 页脚 */
        footer {
            background: var(--dark-color);
            color: #999;
            padding: 60px 0 20px 0;
            font-size: 13px;
            border-top: 5px solid var(--primary-color);
        }

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

        .footer-info h4 {
            color: white;
            margin-bottom: 20px;
            font-size: 16px;
        }

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

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

        .footer-links a {
            color: #999;
            text-decoration: none;
            transition: color 0.3s;
        }

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

        .friendly-links {
            margin-top: 30px;
            padding-top: 20px;
            border-top: 1px solid #333;
            text-align: center;
        }

        .friendly-links h5 {
            color: white;
            margin-bottom: 15px;
            font-size: 14px;
        }

        .friendly-links a {
            color: #999;
            text-decoration: none;
            margin: 0 10px;
            display: inline-block;
            transition: color 0.3s;
        }

        .friendly-links a:hover {
            color: var(--primary-color);
        }

        .copyright-bar {
            text-align: center;
            padding-top: 20px;
            border-top: 1px solid #333;
            font-size: 12px;
            color: #666;
        }

        .ai-page-home-link {
            color: var(--primary-color);
            font-weight: bold;
            text-decoration: none;
        }

        /* 浮动客服 */
        .float-kefu {
            position: fixed;
            right: 20px;
            bottom: 20px;
            z-index: 1000;
            background: var(--primary-color);
            color: white;
            width: 50px;
            height: 50px;
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            cursor: pointer;
            box-shadow: 0 4px 15px rgba(230,0,18,0.4);
            font-weight: bold;
            font-size: 12px;
            text-align: center;
            line-height: 1.2;
            transition: transform 0.3s;
        }

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

        .float-kefu-panel {
            position: fixed;
            right: 80px;
            bottom: 20px;
            z-index: 1000;
            background: white;
            border: 2px solid var(--primary-color);
            border-radius: 8px;
            padding: 15px;
            box-shadow: 0 5px 20px rgba(0,0,0,0.15);
            display: none;
            text-align: center;
            width: 160px;
        }

        .float-kefu-panel img {
            width: 100%;
            height: auto;
            margin-bottom: 8px;
        }

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

        /* 响应式媒体查询 */
        @media (max-width: 992px) {
            .stats-grid, .services-grid, .cases-grid, .testimonials-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .workflow-timeline {
                grid-template-columns: repeat(2, 1fr);
            }
            .flow-step::after {
                display: none;
            }
            .about-content, .sol-grid, .training-grid, .help-grid, .contact-content {
                grid-template-columns: 1fr;
            }
            .footer-grid {
                grid-template-columns: 1fr;
            }
        }

        @media (max-width: 768px) {
            .menu-toggle {
                display: flex;
            }
            .nav-menu {
                display: none;
                flex-direction: column;
                position: absolute;
                top: 70px;
                left: 0;
                width: 100%;
                background: white;
                border-bottom: 2px solid var(--primary-color);
                padding: 20px;
                box-shadow: 0 10px 15px rgba(0,0,0,0.1);
                gap: 15px;
            }
            .nav-menu.active {
                display: flex;
            }
            .hero h1 {
                font-size: 1.8rem;
            }
            .stats-grid, .services-grid, .cases-grid, .testimonials-grid {
                grid-template-columns: 1fr;
            }
            .workflow-timeline {
                grid-template-columns: 1fr;
            }
            .lead-form {
                grid-template-columns: 1fr;
            }
            .form-group.full-width {
                grid-column: span 1;
            }
            .price-grid {
                grid-template-columns: 1fr;
                gap: 30px;
            }
        }