:root {
            --primary-grad: linear-gradient(135deg, #4f46e5 0%, #7c3aed 50%, #06b6d4 100%);
            --btn-grad: linear-gradient(135deg, #6366f1 0%, #a855f7 100%);
            --primary: #4f46e5;
            --secondary: #06b6d4;
            --text-main: #0f172a;
            --text-muted: #475569;
            --bg-light: #f8fafc;
            --bg-card: #ffffff;
            --border-color: #e2e8f0;
            --radius-lg: 16px;
            --radius-md: 8px;
            --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
        }

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

        body {
            font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
            background-color: var(--bg-light);
            color: var(--text-main);
            line-height: 1.6;
            overflow-x: hidden;
        }

        a {
            text-decoration: none;
            color: inherit;
            transition: var(--transition);
        }

        /* 统一容器 */
        .container {
            width: 100%;
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 24px;
        }

        /* 导航栏 */
        header {
            position: sticky;
            top: 0;
            z-index: 1000;
            background: rgba(255, 255, 255, 0.85);
            backdrop-filter: blur(12px);
            border-bottom: 1px solid var(--border-color);
            transition: var(--transition);
        }

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

        .logo-box {
            display: flex;
            align-items: center;
            height: 40px;
        }

        .logo-box img {
            max-height: 100%;
            width: auto;
        }

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

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

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

        .nav-btn {
            background: var(--btn-grad);
            color: #ffffff;
            padding: 8px 18px;
            border-radius: 30px;
            font-size: 14px;
            font-weight: 600;
            box-shadow: 0 4px 10px rgba(99, 102, 241, 0.2);
        }

        .nav-btn:hover {
            transform: translateY(-2px);
            box-shadow: 0 6px 15px rgba(99, 102, 241, 0.35);
        }

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

        .mobile-toggle span {
            width: 25px;
            height: 2px;
            background-color: var(--text-main);
            transition: var(--transition);
        }

        /* Hero 首屏 - 禁止任何图片 */
        .hero-section {
            padding: 100px 0 80px 0;
            background: radial-gradient(circle at 80% 20%, rgba(99, 102, 241, 0.08) 0%, transparent 50%),
                        radial-gradient(circle at 10% 80%, rgba(6, 182, 212, 0.08) 0%, transparent 50%);
            text-align: center;
            position: relative;
        }

        .badge {
            display: inline-flex;
            align-items: center;
            padding: 6px 16px;
            background: rgba(99, 102, 241, 0.1);
            color: var(--primary);
            border-radius: 100px;
            font-size: 13px;
            font-weight: 600;
            margin-bottom: 24px;
            letter-spacing: 0.5px;
            border: 1px solid rgba(99, 102, 241, 0.15);
        }

        h1.hero-title {
            font-size: 44px;
            font-weight: 800;
            line-height: 1.25;
            letter-spacing: -0.5px;
            margin-bottom: 20px;
            background: var(--primary-grad);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
        }

        .hero-desc {
            font-size: 18px;
            color: var(--text-muted);
            max-width: 760px;
            margin: 0 auto 36px auto;
        }

        .hero-actions {
            display: flex;
            justify-content: center;
            align-items: center;
            gap: 16px;
            margin-bottom: 50px;
        }

        .btn-primary {
            background: var(--btn-grad);
            color: #ffffff !important;
            padding: 14px 32px;
            border-radius: 30px;
            font-size: 16px;
            font-weight: 600;
            box-shadow: 0 8px 20px rgba(99, 102, 241, 0.25);
        }

        .btn-primary:hover {
            transform: translateY(-2px);
            box-shadow: 0 12px 25px rgba(99, 102, 241, 0.4);
        }

        .btn-secondary {
            background: #ffffff;
            color: var(--text-main);
            border: 1px solid var(--border-color);
            padding: 14px 32px;
            border-radius: 30px;
            font-size: 16px;
            font-weight: 600;
        }

        .btn-secondary:hover {
            background: var(--bg-light);
            border-color: #cbd5e1;
        }

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

        .metric-card {
            background: var(--bg-card);
            border: 1px solid var(--border-color);
            border-radius: var(--radius-lg);
            padding: 24px;
            box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.05);
            transition: var(--transition);
        }

        .metric-card:hover {
            transform: translateY(-4px);
            box-shadow: 0 12px 20px -5px rgba(0, 0, 0, 0.1);
        }

        .metric-num {
            font-size: 32px;
            font-weight: 700;
            color: var(--primary);
            margin-bottom: 6px;
        }

        .metric-label {
            font-size: 13px;
            color: var(--text-muted);
            font-weight: 500;
        }

        /* 统一分块容器 */
        section {
            padding: 80px 0;
            border-bottom: 1px solid var(--border-color);
        }

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

        .section-title {
            font-size: 30px;
            font-weight: 700;
            color: var(--text-main);
            margin-bottom: 12px;
        }

        .section-subtitle {
            font-size: 15px;
            color: var(--text-muted);
            max-width: 600px;
            margin: 0 auto;
        }

        /* 模型聚合展示 */
        .model-tags {
            display: flex;
            flex-wrap: wrap;
            justify-content: center;
            gap: 10px;
            margin-top: 24px;
        }

        .model-tag {
            background: #ffffff;
            border: 1px solid var(--border-color);
            padding: 6px 14px;
            border-radius: 30px;
            font-size: 13px;
            font-weight: 500;
            color: var(--text-muted);
            transition: var(--transition);
        }

        .model-tag:hover {
            border-color: var(--primary);
            color: var(--primary);
            background: rgba(99, 102, 241, 0.02);
        }

        /* 场景卡片 */
        .card-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 24px;
        }

        .service-card {
            background: var(--bg-card);
            border: 1px solid var(--border-color);
            border-radius: var(--radius-lg);
            padding: 32px;
            transition: var(--transition);
        }

        .service-card:hover {
            transform: translateY(-5px);
            box-shadow: 0 20px 25px -5px rgba(0, 0, 0, 0.08);
            border-color: rgba(99, 102, 241, 0.3);
        }

        .card-icon {
            width: 48px;
            height: 48px;
            border-radius: 12px;
            background: rgba(99, 102, 241, 0.1);
            color: var(--primary);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 20px;
            font-weight: bold;
            margin-bottom: 20px;
        }

        .card-title {
            font-size: 18px;
            font-weight: 700;
            margin-bottom: 12px;
        }

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

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

        .step-item {
            background: var(--bg-card);
            border: 1px solid var(--border-color);
            border-radius: var(--radius-lg);
            padding: 24px;
            position: relative;
            z-index: 2;
        }

        .step-num {
            position: absolute;
            top: 20px;
            right: 20px;
            font-size: 36px;
            font-weight: 800;
            color: rgba(99, 102, 241, 0.1);
            line-height: 1;
        }

        .step-title {
            font-size: 16px;
            font-weight: 700;
            margin-bottom: 8px;
            margin-top: 12px;
        }

        .step-desc {
            font-size: 13px;
            color: var(--text-muted);
        }

        /* 对比评测表格 */
        .table-container {
            width: 100%;
            overflow-x: auto;
            background: var(--bg-card);
            border: 1px solid var(--border-color);
            border-radius: var(--radius-lg);
            box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.05);
        }

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

        th, td {
            padding: 16px 24px;
            border-bottom: 1px solid var(--border-color);
            font-size: 14px;
        }

        th {
            background-color: #f8fafc;
            font-weight: 600;
            color: var(--text-main);
        }

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

        .highlight-col {
            background: rgba(99, 102, 241, 0.02);
            font-weight: 600;
        }

        .star-rating {
            color: #fbbf24;
            font-size: 16px;
        }

        /* 案例展示区 */
        .cases-grid {
            display: grid;
            grid-template-columns: 2fr 1fr;
            gap: 24px;
        }

        .case-left {
            display: flex;
            flex-direction: column;
            gap: 24px;
        }

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

        .case-card:hover {
            transform: translateY(-4px);
            box-shadow: 0 12px 20px rgba(0, 0, 0, 0.08);
        }

        .case-img-box {
            width: 100%;
            height: 240px;
            overflow: hidden;
            background: #f1f5f9;
        }

        .case-img-box img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: var(--transition);
        }

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

        .case-body {
            padding: 24px;
        }

        .case-tag {
            font-size: 11px;
            text-transform: uppercase;
            font-weight: 700;
            color: var(--primary);
            letter-spacing: 0.5px;
            margin-bottom: 8px;
            display: inline-block;
        }

        .case-title {
            font-size: 18px;
            font-weight: 700;
            margin-bottom: 8px;
        }

        .case-text {
            font-size: 13px;
            color: var(--text-muted);
        }

        .square-case {
            height: 100%;
        }

        .square-case .case-img-box {
            height: 380px;
        }

        /* FAQ 折叠面板 */
        .faq-list {
            max-width: 800px;
            margin: 0 auto;
            display: flex;
            flex-direction: column;
            gap: 12px;
        }

        .faq-item {
            background: var(--bg-card);
            border: 1px solid var(--border-color);
            border-radius: var(--radius-md);
            overflow: hidden;
            transition: var(--transition);
        }

        .faq-question {
            padding: 18px 24px;
            font-size: 15px;
            font-weight: 600;
            display: flex;
            justify-content: space-between;
            align-items: center;
            cursor: pointer;
            user-select: none;
        }

        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.3s ease-out;
            background-color: #fafafa;
        }

        .faq-answer-content {
            padding: 20px 24px;
            font-size: 14px;
            color: var(--text-muted);
            border-top: 1px solid var(--border-color);
        }

        .faq-toggle-icon {
            transition: transform 0.3s ease;
            width: 14px;
            height: 14px;
        }

        .faq-item.active .faq-toggle-icon {
            transform: rotate(180deg);
        }

        .faq-item.active .faq-answer {
            max-height: 200px;
        }

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

        .comment-card {
            background: var(--bg-card);
            border: 1px solid var(--border-color);
            border-radius: var(--radius-lg);
            padding: 24px;
            display: flex;
            flex-direction: column;
            justify-content: space-between;
            box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.03);
        }

        .comment-content {
            font-size: 14px;
            color: var(--text-muted);
            margin-bottom: 20px;
            font-style: italic;
        }

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

        .user-avatar {
            width: 40px;
            height: 40px;
            border-radius: 50%;
            background: #cbd5e1;
            display: flex;
            align-items: center;
            justify-content: center;
            font-weight: 700;
            color: #ffffff;
            font-size: 14px;
        }

        .user-info h4 {
            font-size: 14px;
            font-weight: 700;
        }

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

        /* 文章列表与资讯 */
        .article-section {
            background-color: #ffffff;
        }

        .articles-list {
            display: flex;
            flex-direction: column;
            gap: 16px;
            max-width: 800px;
            margin: 0 auto;
        }

        .article-item {
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding: 16px;
            border: 1px solid var(--border-color);
            border-radius: var(--radius-md);
            transition: var(--transition);
        }

        .article-item:hover {
            border-color: var(--primary);
            background: rgba(99, 102, 241, 0.01);
            transform: translateX(4px);
        }

        .article-title {
            font-size: 15px;
            font-weight: 600;
            color: var(--text-main);
        }

        .article-meta {
            font-size: 12px;
            color: var(--text-muted);
        }

        /* 表单与联系我们 */
        .contact-layout {
            display: grid;
            grid-template-columns: 1fr 1.2fr;
            gap: 40px;
            align-items: start;
        }

        .contact-info {
            display: flex;
            flex-direction: column;
            gap: 24px;
        }

        .info-card {
            background: var(--bg-card);
            border: 1px solid var(--border-color);
            border-radius: var(--radius-lg);
            padding: 24px;
            display: flex;
            align-items: flex-start;
            gap: 16px;
        }

        .info-icon {
            font-size: 24px;
            color: var(--primary);
        }

        .info-text h4 {
            font-size: 16px;
            font-weight: 700;
            margin-bottom: 6px;
        }

        .info-text p, .info-text a {
            font-size: 14px;
            color: var(--text-muted);
        }

        .qr-codes {
            display: flex;
            gap: 20px;
            margin-top: 10px;
        }

        .qr-item {
            text-align: center;
            font-size: 12px;
            color: var(--text-muted);
        }

        .qr-item img {
            width: 100px;
            height: 100px;
            border-radius: var(--radius-md);
            margin-bottom: 8px;
            border: 1px solid var(--border-color);
        }

        .form-card {
            background: var(--bg-card);
            border: 1px solid var(--border-color);
            border-radius: var(--radius-lg);
            padding: 40px;
            box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.05);
        }

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

        .form-label {
            display: block;
            font-size: 13px;
            font-weight: 600;
            margin-bottom: 8px;
            color: var(--text-main);
        }

        .form-control {
            width: 100%;
            padding: 12px 16px;
            border: 1px solid var(--border-color);
            border-radius: var(--radius-md);
            font-size: 14px;
            outline: none;
            transition: var(--transition);
        }

        .form-control:focus {
            border-color: var(--primary);
            box-shadow: 0 0 0 3px rgba(99, 102, 241, 0.15);
        }

        textarea.form-control {
            resize: vertical;
            min-height: 100px;
        }

        .btn-submit {
            width: 100%;
            background: var(--btn-grad);
            color: #ffffff;
            border: none;
            padding: 14px;
            border-radius: var(--radius-md);
            font-size: 16px;
            font-weight: 600;
            cursor: pointer;
            transition: var(--transition);
        }

        .btn-submit:hover {
            opacity: 0.95;
            transform: translateY(-1px);
        }

        /* 标签云、时间线、服务网络等 */
        .timeline {
            position: relative;
            max-width: 800px;
            margin: 0 auto;
            padding-left: 30px;
        }

        .timeline::before {
            content: '';
            position: absolute;
            left: 5px;
            top: 0;
            bottom: 0;
            width: 2px;
            background: var(--border-color);
        }

        .timeline-item {
            position: relative;
            margin-bottom: 40px;
        }

        .timeline-item::before {
            content: '';
            position: absolute;
            left: -30px;
            top: 6px;
            width: 12px;
            height: 12px;
            border-radius: 50%;
            background: var(--primary);
            border: 2px solid #ffffff;
        }

        .timeline-date {
            font-size: 13px;
            font-weight: 700;
            color: var(--primary);
            margin-bottom: 4px;
        }

        .timeline-content h4 {
            font-size: 16px;
            font-weight: 700;
            margin-bottom: 6px;
        }

        .timeline-content p {
            font-size: 13px;
            color: var(--text-muted);
        }

        .service-map {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 16px;
            text-align: center;
        }

        .map-item {
            background: #ffffff;
            border: 1px solid var(--border-color);
            border-radius: var(--radius-md);
            padding: 16px;
        }

        .map-city {
            font-size: 15px;
            font-weight: 700;
            margin-bottom: 4px;
        }

        .map-desc {
            font-size: 12px;
            color: var(--text-muted);
        }

        /* 术语百科与排查 */
        .wiki-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 16px;
        }

        .wiki-card {
            background: var(--bg-card);
            border: 1px solid var(--border-color);
            border-radius: var(--radius-md);
            padding: 20px;
        }

        .wiki-word {
            font-size: 15px;
            font-weight: 700;
            color: var(--primary);
            margin-bottom: 8px;
        }

        .wiki-def {
            font-size: 13px;
            color: var(--text-muted);
        }

        /* 底部友情链接与版权 */
        footer {
            background-color: #0f172a;
            color: #94a3b8;
            padding: 60px 0 30px 0;
            font-size: 13px;
        }

        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1.2fr;
            gap: 40px;
            margin-bottom: 40px;
        }

        .footer-logo img {
            max-height: 40px;
            width: auto;
            margin-bottom: 16px;
            
        }

        .footer-logo p {
            max-width: 320px;
            margin-bottom: 16px;
        }

        .footer-links h4 {
            color: #ffffff;
            font-size: 14px;
            margin-bottom: 16px;
        }

        .footer-links-list {
            list-style: none;
            display: flex;
            flex-direction: column;
            gap: 8px;
        }

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

        .friend-links {
            border-top: 1px solid #1e293b;
            padding-top: 20px;
            margin-bottom: 20px;
            display: flex;
            flex-wrap: wrap;
            gap: 16px;
        }

        .friend-links a {
            color: #64748b;
        }

        .friend-links a:hover {
            color: #ffffff;
        }

        .footer-bottom {
            border-top: 1px solid #1e293b;
            padding-top: 20px;
            display: flex;
            justify-content: space-between;
            align-items: center;
        }

        /* 浮动组件与返回顶部 */
        .floating-contact {
            position: fixed;
            right: 20px;
            bottom: 20px;
            z-index: 999;
            display: flex;
            flex-direction: column;
            gap: 10px;
        }

        .float-btn {
            width: 50px;
            height: 50px;
            border-radius: 50%;
            background: #ffffff;
            box-shadow: 0 4px 15px rgba(0, 0, 0, 0.15);
            display: flex;
            align-items: center;
            justify-content: center;
            cursor: pointer;
            transition: var(--transition);
            position: relative;
        }

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

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

        .qr-popover {
            position: absolute;
            bottom: 60px;
            right: 0;
            background: #ffffff;
            padding: 12px;
            border-radius: var(--radius-lg);
            box-shadow: 0 10px 25px rgba(0,0,0,0.15);
            display: none;
            text-align: center;
            width: 140px;
        }

        .qr-popover img {
            width: 100%;
            border-radius: var(--radius-md);
        }

        .qr-popover p {
            color: var(--text-main);
            font-size: 11px;
            margin-top: 6px;
            font-weight: bold;
        }

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

        /* 移动端响应式 */
        @media (max-width: 992px) {
            .nav-menu {
                display: none;
                position: absolute;
                top: 72px;
                left: 0;
                right: 0;
                background: #ffffff;
                flex-direction: column;
                padding: 20px;
                border-bottom: 1px solid var(--border-color);
                box-shadow: 0 10px 15px rgba(0,0,0,0.05);
            }
            .nav-menu.active {
                display: flex;
            }
            .mobile-toggle {
                display: flex;
            }
            .hero-title {
                font-size: 32px;
            }
            .metrics-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .card-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .cases-grid {
                grid-template-columns: 1fr;
            }
            .contact-layout {
                grid-template-columns: 1fr;
            }
            .footer-grid {
                grid-template-columns: 1fr;
            }
            .process-steps {
                grid-template-columns: repeat(2, 1fr);
            }
        }

        @media (max-width: 576px) {
            .hero-title {
                font-size: 28px;
            }
            .metrics-grid {
                grid-template-columns: 1fr;
            }
            .card-grid {
                grid-template-columns: 1fr;
            }
            .process-steps {
                grid-template-columns: 1fr;
            }
            .wiki-grid {
                grid-template-columns: 1fr;
            }
            .service-map {
                grid-template-columns: repeat(2, 1fr);
            }
            .comments-grid {
                grid-template-columns: 1fr;
            }
            .footer-bottom {
                flex-direction: column;
                gap: 10px;
                text-align: center;
            }
        }