:root {
            --primary: #0052d9;
            --primary-hover: #003eb3;
            --primary-light: #e3f2fd;
            --secondary: #00c2ff;
            --text-dark: #0f172a;
            --text-muted: #475569;
            --text-light: #64748b;
            --bg-light: #f8fafc;
            --bg-white: #ffffff;
            --border-color: #e2e8f0;
            --container-width: 1200px;
            --font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, "Noto Sans CJK SC", sans-serif;
        }

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

        html {
            scroll-behavior: smooth;
            font-family: var(--font-family);
            color: var(--text-dark);
            background-color: var(--bg-light);
        }

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

        a {
            color: var(--primary);
            text-decoration: none;
            transition: color 0.3s ease;
        }

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

        ul {
            list-style: none;
        }

        img {
            max-width: 100%;
            height: auto;
            display: block;
        }

        /* 统一容器类 */
        .container {
            width: 100%;
            max-width: var(--container-width);
            margin: 0 auto;
            padding: 0 24px;
        }

        /* 按钮样式 */
        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            padding: 12px 28px;
            border-radius: 8px;
            font-size: 16px;
            font-weight: 600;
            cursor: pointer;
            transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
            border: none;
        }

        .btn-primary {
            background-color: var(--primary);
            color: #ffffff;
        }

        .btn-primary:hover {
            background-color: var(--primary-hover);
            transform: translateY(-2px);
            box-shadow: 0 4px 12px rgba(0, 82, 217, 0.25);
            color: #ffffff;
        }

        .btn-secondary {
            background-color: var(--primary-light);
            color: var(--primary);
            border: 1px solid rgba(0, 82, 217, 0.15);
        }

        .btn-secondary:hover {
            background-color: #d0e7ff;
            transform: translateY(-2px);
        }

        /* 全局卡片悬停效果 */
        .hover-card {
            transition: transform 0.3s ease, box-shadow 0.3s ease;
        }

        .hover-card:hover {
            transform: translateY(-5px);
            box-shadow: 0 10px 30px rgba(0, 82, 217, 0.08);
        }

        /* 顶部导航 */
        header {
            background-color: rgba(255, 255, 255, 0.95);
            backdrop-filter: blur(10px);
            position: sticky;
            top: 0;
            z-index: 100;
            border-bottom: 1px solid var(--border-color);
            box-shadow: 0 2px 10px rgba(0, 0, 0, 0.02);
        }

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

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

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

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

        .nav-links a {
            color: var(--text-muted);
            font-weight: 500;
            font-size: 15px;
            padding: 8px 12px;
            border-radius: 6px;
            transition: all 0.2s ease;
        }

        .nav-links a:hover,
        .nav-links a.active {
            color: var(--primary);
            background-color: var(--primary-light);
        }

        .mobile-menu-btn {
            display: none;
            background: none;
            border: none;
            font-size: 24px;
            cursor: pointer;
            color: var(--text-dark);
        }

        /* 首屏 Hero (无图片) */
        .hero-section {
            background: linear-gradient(135deg, #f0f4ff 0%, #e0ebff 100%);
            padding: 100px 0 80px;
            position: relative;
            overflow: hidden;
        }

        .hero-section::before {
            content: '';
            position: absolute;
            top: -20%;
            left: -10%;
            width: 600px;
            height: 600px;
            background: radial-gradient(circle, rgba(0, 194, 255, 0.15) 0%, rgba(255,255,255,0) 70%);
            z-index: 1;
        }

        .hero-content {
            position: relative;
            z-index: 2;
            text-align: center;
            max-width: 800px;
            margin: 0 auto;
        }

        .h1-title {
            font-size: 40px;
            font-weight: 800;
            line-height: 1.3;
            color: var(--text-dark);
            margin-bottom: 24px;
            letter-spacing: -0.5px;
        }

        .h1-title span {
            color: var(--primary);
            background: linear-gradient(120deg, var(--primary) 0%, var(--secondary) 100%);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
        }

        .hero-desc {
            font-size: 18px;
            color: var(--text-muted);
            margin-bottom: 36px;
            line-height: 1.8;
        }

        .hero-cta {
            display: flex;
            justify-content: center;
            gap: 16px;
            margin-bottom: 40px;
        }

        /* 核心优势标签 */
        .hero-badges {
            display: flex;
            justify-content: center;
            flex-wrap: wrap;
            gap: 12px;
        }

        .badge-item {
            background-color: var(--bg-white);
            border: 1px solid var(--border-color);
            padding: 8px 16px;
            border-radius: 50px;
            font-size: 14px;
            font-weight: 500;
            color: var(--text-dark);
            box-shadow: 0 2px 6px rgba(0,0,0,0.02);
        }

        /* 通用区块样式 */
        .section-padding {
            padding: 80px 0;
            background-color: var(--bg-white);
        }

        .section-alt {
            background-color: var(--bg-light);
        }

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

        .section-title {
            font-size: 32px;
            font-weight: 700;
            color: var(--text-dark);
            margin-bottom: 16px;
            position: relative;
            display: inline-block;
        }

        .section-title::after {
            content: '';
            position: absolute;
            bottom: -8px;
            left: 50%;
            transform: translateX(-50%);
            width: 50px;
            height: 4px;
            background-color: var(--primary);
            border-radius: 2px;
        }

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

        /* 数据指标卡片 */
        .metrics-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 24px;
            margin-top: -40px;
            position: relative;
            z-index: 10;
        }

        .metric-card {
            background-color: var(--bg-white);
            border-radius: 12px;
            padding: 30px 20px;
            text-align: center;
            box-shadow: 0 10px 30px rgba(0, 0, 0, 0.05);
            border: 1px solid var(--border-color);
        }

        .metric-num {
            font-size: 36px;
            font-weight: 800;
            color: var(--primary);
            margin-bottom: 8px;
        }

        .metric-label {
            font-size: 14px;
            color: var(--text-muted);
            font-weight: 500;
        }

        /* 全平台AIGC服务与模型聚合 */
        .platform-grid {
            display: grid;
            grid-template-columns: repeat(auto-fill, minmax(130px, 1fr));
            gap: 16px;
            margin-top: 30px;
        }

        .platform-tag {
            background-color: var(--bg-white);
            border: 1px solid var(--border-color);
            padding: 12px 8px;
            border-radius: 8px;
            text-align: center;
            font-size: 14px;
            font-weight: 600;
            color: var(--text-dark);
            box-shadow: 0 2px 4px rgba(0,0,0,0.01);
        }

        .platform-tag:hover {
            border-color: var(--primary);
            color: var(--primary);
            background-color: var(--primary-light);
        }

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

        .service-card {
            background-color: var(--bg-white);
            border-radius: 12px;
            padding: 40px 30px;
            border: 1px solid var(--border-color);
        }

        .service-icon {
            width: 56px;
            height: 56px;
            background-color: var(--primary-light);
            border-radius: 10px;
            display: flex;
            align-items: center;
            justify-content: center;
            margin-bottom: 24px;
            color: var(--primary);
            font-size: 24px;
            font-weight: bold;
        }

        .service-card h3 {
            font-size: 20px;
            font-weight: 700;
            margin-bottom: 16px;
            color: var(--text-dark);
        }

        .service-card p {
            font-size: 15px;
            color: var(--text-muted);
            line-height: 1.6;
        }

        /* 流程步骤 */
        .process-steps {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 24px;
            position: relative;
        }

        .process-step {
            background-color: var(--bg-white);
            padding: 30px 24px;
            border-radius: 12px;
            border: 1px solid var(--border-color);
            position: relative;
        }

        .step-num {
            position: absolute;
            top: -20px;
            left: 24px;
            width: 40px;
            height: 40px;
            background-color: var(--primary);
            color: #ffffff;
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            font-weight: 700;
            font-size: 18px;
            box-shadow: 0 4px 10px rgba(0, 82, 217, 0.3);
        }

        .process-step h4 {
            font-size: 18px;
            font-weight: 700;
            margin: 15px 0 10px 0;
            color: var(--text-dark);
        }

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

        /* 对比评测表格 */
        .table-responsive {
            overflow-x: auto;
            border-radius: 12px;
            border: 1px solid var(--border-color);
            box-shadow: 0 4px 15px rgba(0,0,0,0.02);
            background-color: var(--bg-white);
        }

        .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(--border-color);
        }

        .compare-table th {
            background-color: #f1f5f9;
            color: var(--text-dark);
            font-weight: 700;
        }

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

        .compare-table tr.highlight-row {
            background-color: var(--primary-light);
        }

        .compare-table tr.highlight-row td {
            font-weight: 600;
        }

        .score-badge {
            display: inline-block;
            background-color: #e2fbe8;
            color: #0d8a2a;
            padding: 4px 10px;
            border-radius: 6px;
            font-weight: 700;
        }

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

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

        .case-img-container {
            position: relative;
            background-color: #e2e8f0;
            aspect-ratio: 16 / 9;
            overflow: hidden;
        }

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

        .case-card:hover img {
            transform: scale(1.05);
        }

        .case-body {
            padding: 24px;
        }

        .case-tag {
            display: inline-block;
            background-color: var(--primary-light);
            color: var(--primary);
            font-size: 12px;
            font-weight: 600;
            padding: 4px 8px;
            border-radius: 4px;
            margin-bottom: 12px;
        }

        .case-body h4 {
            font-size: 18px;
            font-weight: 700;
            margin-bottom: 10px;
            color: var(--text-dark);
        }

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

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

        .review-card {
            background-color: var(--bg-white);
            border-radius: 12px;
            padding: 30px;
            border: 1px solid var(--border-color);
            display: flex;
            flex-direction: column;
            justify-content: space-between;
        }

        .review-text {
            font-size: 14px;
            color: var(--text-muted);
            margin-bottom: 20px;
            line-height: 1.7;
            position: relative;
        }

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

        .review-avatar {
            width: 44px;
            height: 44px;
            border-radius: 50%;
            background-color: var(--primary-light);
            display: flex;
            align-items: center;
            justify-content: center;
            font-weight: 700;
            color: var(--primary);
        }

        .review-info h5 {
            font-size: 15px;
            font-weight: 700;
            color: var(--text-dark);
        }

        .review-info p {
            font-size: 12px;
            color: var(--text-light);
        }

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

        .faq-item {
            background-color: var(--bg-white);
            border-radius: 8px;
            border: 1px solid var(--border-color);
            overflow: hidden;
            transition: all 0.3s ease;
        }

        .faq-question {
            padding: 20px 24px;
            font-size: 16px;
            font-weight: 700;
            color: var(--text-dark);
            display: flex;
            justify-content: space-between;
            align-items: center;
            cursor: pointer;
            user-select: none;
        }

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

        .faq-item.active {
            border-color: var(--primary);
            box-shadow: 0 4px 12px rgba(0, 82, 217, 0.05);
        }

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

        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.3s cubic-bezier(0, 1, 0, 1);
            background-color: #fafbfc;
        }

        .faq-answer-inner {
            padding: 20px 24px;
            font-size: 15px;
            color: var(--text-muted);
            line-height: 1.7;
            border-top: 1px solid var(--border-color);
        }

        /* 排查与百科卡片 */
        .troubleshoot-grid {
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: 30px;
        }

        .wiki-card, .trouble-card {
            background-color: var(--bg-white);
            border-radius: 12px;
            padding: 30px;
            border: 1px solid var(--border-color);
        }

        .wiki-list li, .trouble-list li {
            margin-bottom: 16px;
            padding-bottom: 12px;
            border-bottom: 1px dashed var(--border-color);
        }

        .wiki-list li:last-child, .trouble-list li:last-child {
            border-bottom: none;
            margin-bottom: 0;
            padding-bottom: 0;
        }

        .wiki-title, .trouble-title {
            font-weight: 700;
            font-size: 16px;
            color: var(--text-dark);
            margin-bottom: 4px;
        }

        .wiki-desc, .trouble-desc {
            font-size: 14px;
            color: var(--text-muted);
        }

        /* 资讯/知识库列表 */
        .articles-box {
            background-color: var(--bg-white);
            border-radius: 12px;
            padding: 35px;
            border: 1px solid var(--border-color);
            margin-bottom: 30px;
        }

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

        .article-item {
            padding: 16px;
            border-radius: 8px;
            border: 1px solid var(--border-color);
            transition: all 0.3s ease;
        }

        .article-item:hover {
            border-color: var(--primary);
            background-color: var(--primary-light);
        }

        .article-item a {
            display: block;
            font-weight: 600;
            font-size: 15px;
            color: var(--text-dark);
            margin-bottom: 8px;
        }

        .article-item p {
            font-size: 13px;
            color: var(--text-light);
        }

        /* 需求匹配与联系我们表单 */
        .form-section-layout {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 50px;
            align-items: start;
        }

        .contact-info-panel {
            background: linear-gradient(135deg, var(--primary) 0%, #0033aa 100%);
            color: #ffffff;
            padding: 40px;
            border-radius: 12px;
        }

        .contact-info-panel h3 {
            font-size: 24px;
            margin-bottom: 24px;
        }

        .contact-meta-item {
            display: flex;
            align-items: flex-start;
            gap: 16px;
            margin-bottom: 24px;
        }

        .contact-meta-item h4 {
            font-size: 16px;
            margin-bottom: 4px;
            color: rgba(255,255,255,0.9);
        }

        .contact-meta-item p {
            font-size: 14px;
            color: rgba(255,255,255,0.7);
        }

        .qrcode-container {
            display: flex;
            gap: 20px;
            margin-top: 30px;
            background: rgba(255, 255, 255, 0.1);
            padding: 20px;
            border-radius: 8px;
            backdrop-filter: blur(5px);
        }

        .qrcode-box {
            text-align: center;
            flex: 1;
        }

        .qrcode-box img {
            width: 100px;
            height: 100px;
            margin: 0 auto 10px;
            border-radius: 6px;
            background-color: white;
            padding: 4px;
        }

        .qrcode-box p {
            font-size: 12px;
            color: rgba(255,255,255,0.8);
        }

        .form-panel {
            background-color: var(--bg-white);
            border-radius: 12px;
            padding: 40px;
            border: 1px solid var(--border-color);
            box-shadow: 0 4px 20px rgba(0,0,0,0.02);
        }

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

        .form-label {
            display: block;
            font-size: 14px;
            font-weight: 700;
            margin-bottom: 8px;
            color: var(--text-dark);
        }

        .form-control {
            width: 100%;
            padding: 12px 16px;
            border: 1px solid var(--border-color);
            border-radius: 8px;
            font-size: 15px;
            color: var(--text-dark);
            background-color: #fafbfc;
            transition: all 0.3s ease;
        }

        .form-control:focus {
            outline: none;
            border-color: var(--primary);
            background-color: #ffffff;
            box-shadow: 0 0 0 3px rgba(0, 82, 217, 0.15);
        }

        textarea.form-control {
            resize: vertical;
            min-height: 120px;
        }

        /* 页脚区域 */
        footer {
            background-color: #0f172a;
            color: #94a3b8;
            padding: 60px 0 30px;
            border-top: 1px solid #1e293b;
        }

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

        .footer-brand img {
            height: 40px;
            margin-bottom: 20px;
        }

        .footer-brand p {
            font-size: 14px;
            line-height: 1.7;
            margin-bottom: 16px;
        }

        .footer-col h4 {
            color: #ffffff;
            font-size: 16px;
            font-weight: 700;
            margin-bottom: 20px;
            position: relative;
        }

        .footer-col h4::after {
            content: '';
            position: absolute;
            bottom: -6px;
            left: 0;
            width: 24px;
            height: 2px;
            background-color: var(--primary);
        }

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

        .footer-links a {
            color: #94a3b8;
            font-size: 14px;
        }

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

        .friend-links {
            display: flex;
            flex-wrap: wrap;
            gap: 10px;
        }

        .friend-links a {
            background-color: #1e293b;
            color: #94a3b8;
            padding: 6px 12px;
            border-radius: 4px;
            font-size: 12px;
        }

        .friend-links a:hover {
            background-color: var(--primary);
            color: #ffffff;
        }

        .footer-bottom {
            border-top: 1px solid #1e293b;
            padding-top: 30px;
            text-align: center;
            font-size: 13px;
        }

        /* 侧边浮动客服 */
        .floating-service {
            position: fixed;
            bottom: 40px;
            right: 30px;
            display: flex;
            flex-direction: column;
            gap: 12px;
            z-index: 99;
        }

        .float-btn {
            width: 48px;
            height: 48px;
            border-radius: 50%;
            background-color: var(--bg-white);
            border: 1px solid var(--border-color);
            box-shadow: 0 4px 15px rgba(0,0,0,0.1);
            display: flex;
            align-items: center;
            justify-content: center;
            cursor: pointer;
            transition: all 0.3s ease;
            position: relative;
        }

        .float-btn:hover {
            background-color: var(--primary);
            color: #ffffff;
            transform: translateY(-3px);
        }

        .float-btn svg {
            width: 20px;
            height: 20px;
            fill: currentColor;
        }

        .float-btn .tooltip-qr {
            position: absolute;
            right: 60px;
            bottom: 0;
            background-color: var(--bg-white);
            border: 1px solid var(--border-color);
            padding: 16px;
            border-radius: 8px;
            box-shadow: 0 10px 30px rgba(0,0,0,0.15);
            display: none;
            text-align: center;
            width: 140px;
        }

        .float-btn .tooltip-qr img {
            width: 100px;
            height: 100px;
            margin: 0 auto 8px;
        }

        .float-btn .tooltip-qr p {
            color: var(--text-dark);
            font-size: 11px;
            font-weight: 600;
        }

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

        /* 响应式媒体查询 */
        @media (max-width: 1024px) {
            .service-grid, 
            .case-grid, 
            .review-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .metrics-grid {
                grid-template-columns: repeat(2, 1fr);
                margin-top: 20px;
            }
            .footer-grid {
                grid-template-columns: repeat(2, 1fr);
            }
        }

        @media (max-width: 768px) {
            .h1-title {
                font-size: 28px;
            }
            .nav-links {
                display: none;
                position: absolute;
                top: 72px;
                left: 0;
                width: 100%;
                background-color: var(--bg-white);
                flex-direction: column;
                padding: 20px;
                border-bottom: 1px solid var(--border-color);
                box-shadow: 0 10px 20px rgba(0,0,0,0.05);
            }
            .nav-links.active {
                display: flex;
            }
            .mobile-menu-btn {
                display: block;
            }
            .service-grid, 
            .case-grid, 
            .review-grid, 
            .process-steps, 
            .troubleshoot-grid, 
            .form-section-layout,
            .articles-list {
                grid-template-columns: 1fr;
            }
            .footer-grid {
                grid-template-columns: 1fr;
            }
            .metrics-grid {
                grid-template-columns: 1fr;
            }
            .hero-cta {
                flex-direction: column;
                align-items: stretch;
            }
        }