/* 基础重置与斑斓彩调风定义 */
        :root {
            --primary: #4F46E5;
            --primary-light: #818CF8;
            --accent-1: #FF8A00;
            --accent-2: #E52E71;
            --accent-3: #00F2FE;
            --bg-base: #F8FAFC;
            --bg-card: rgba(255, 255, 255, 0.85);
            --text-main: #0F172A;
            --text-muted: #475569;
            --border-color: #E2E8F0;
            --rainbow-gradient: linear-gradient(135deg, #FF8A00, #E52E71, #4F46E5, #00F2FE);
        }

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

        body {
            font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
            background-color: var(--bg-base);
            color: var(--text-main);
            line-height: 1.6;
            overflow-x: hidden;
            /* 斑斓背景光圈装饰 */
            background-image: 
                radial-gradient(circle at 10% 20%, rgba(129, 140, 248, 0.08) 0%, transparent 40%),
                radial-gradient(circle at 90% 80%, rgba(229, 46, 113, 0.06) 0%, transparent 40%),
                radial-gradient(circle at 50% 50%, rgba(0, 242, 254, 0.05) 0%, transparent 50%);
            background-attachment: fixed;
        }

        /* 统一容器规范 */
        .container {
            width: 100%;
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 20px;
        }

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

        /* 斑斓彩调风卡片与通用样式 */
        .card {
            background: var(--bg-card);
            backdrop-filter: blur(12px);
            -webkit-backdrop-filter: blur(12px);
            border: 1px solid rgba(255, 255, 255, 0.5);
            border-radius: 16px;
            padding: 30px;
            box-shadow: 0 10px 30px -10px rgba(0, 0, 0, 0.05);
            transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
            position: relative;
            overflow: hidden;
        }
        .card::before {
            content: '';
            position: absolute;
            top: 0; left: 0; right: 0; height: 4px;
            background: var(--rainbow-gradient);
            opacity: 0;
            transition: opacity 0.3s ease;
        }
        .card:hover {
            transform: translateY(-5px);
            box-shadow: 0 20px 40px -15px rgba(79, 70, 229, 0.15);
        }
        .card:hover::before {
            opacity: 1;
        }

        /* 按钮样式 */
        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            padding: 12px 28px;
            border-radius: 50px;
            font-weight: 600;
            text-decoration: none;
            transition: all 0.3s ease;
            cursor: pointer;
            border: none;
        }
        .btn-gradient {
            background: var(--rainbow-gradient);
            color: #ffffff !important;
            box-shadow: 0 4px 15px rgba(229, 46, 113, 0.2);
        }
        .btn-gradient:hover {
            transform: scale(1.05);
            box-shadow: 0 6px 20px rgba(229, 46, 113, 0.3);
        }
        .btn-outline {
            background: transparent;
            color: var(--primary);
            border: 2px solid var(--primary);
        }
        .btn-outline:hover {
            background: var(--primary);
            color: #ffffff;
        }

        /* 标题设计 */
        .section-title {
            text-align: center;
            margin-bottom: 50px;
        }
        .section-title h2 {
            font-size: 2.2rem;
            margin-bottom: 15px;
            background: var(--rainbow-gradient);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            display: inline-block;
        }
        .section-title p {
            color: var(--text-muted);
            font-size: 1.1rem;
            max-width: 600px;
            margin: 0 auto;
        }

        /* 顶部导航 */
        header {
            position: sticky;
            top: 0;
            z-index: 100;
            background: rgba(255, 255, 255, 0.8);
            backdrop-filter: blur(10px);
            border-bottom: 1px solid var(--border-color);
        }
        .nav-container {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 70px;
        }
        .logo-wrap {
            display: flex;
            align-items: center;
        }
        .ai-page-logo {
            max-height: 40px;
        }
        .nav-links {
            display: flex;
            gap: 20px;
            align-items: center;
        }
        .nav-links a {
            text-decoration: none;
            color: var(--text-main);
            font-weight: 500;
            font-size: 0.95rem;
            transition: color 0.3s;
        }
        .nav-links a:hover {
            color: var(--primary);
        }
        .menu-toggle {
            display: none;
            background: none;
            border: none;
            font-size: 1.5rem;
            color: var(--text-main);
            cursor: pointer;
        }

        /* 首屏 (Hero) - 严禁使用图片 */
        #hero {
            padding: 100px 0 80px 0;
            background: radial-gradient(circle at center, rgba(129, 140, 248, 0.1) 0%, transparent 70%);
            text-align: center;
        }
        .hero-badge {
            background: rgba(79, 70, 229, 0.1);
            color: var(--primary);
            padding: 8px 16px;
            border-radius: 30px;
            display: inline-block;
            font-size: 0.9rem;
            font-weight: 600;
            margin-bottom: 20px;
        }
        .hero-title {
            font-size: 3rem;
            line-height: 1.2;
            margin-bottom: 20px;
            background: var(--rainbow-gradient);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
        }
        .hero-desc {
            color: var(--text-muted);
            font-size: 1.25rem;
            max-width: 800px;
            margin: 0 auto 40px auto;
        }
        .hero-btns {
            display: flex;
            justify-content: center;
            gap: 20px;
            margin-bottom: 60px;
        }
        .stats-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
            gap: 20px;
        }
        .stat-card {
            background: var(--bg-card);
            border: 1px solid var(--border-color);
            border-radius: 12px;
            padding: 20px;
        }
        .stat-num {
            font-size: 2.2rem;
            font-weight: 800;
            background: var(--rainbow-gradient);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            margin-bottom: 5px;
        }
        .stat-label {
            color: var(--text-muted);
            font-size: 0.9rem;
        }

        /* 关于我们 */
        .about-wrap {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 50px;
            align-items: center;
        }
        .about-info h3 {
            font-size: 1.8rem;
            margin-bottom: 20px;
            color: var(--text-main);
        }
        .about-info p {
            color: var(--text-muted);
            margin-bottom: 15px;
        }
        .about-features {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 20px;
        }
        .about-feat-item {
            background: white;
            padding: 20px;
            border-radius: 12px;
            box-shadow: 0 4px 10px rgba(0,0,0,0.02);
            border-left: 4px solid var(--accent-2);
        }

        /* 服务与制作 */
        .grid-3 {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
            gap: 30px;
        }
        .service-card h3 {
            font-size: 1.3rem;
            margin: 15px 0 10px 0;
        }
        .service-card p {
            color: var(--text-muted);
            font-size: 0.95rem;
        }
        .service-tags {
            display: flex;
            flex-wrap: wrap;
            gap: 8px;
            margin-top: 15px;
        }
        .tag-pill {
            background: rgba(79, 70, 229, 0.05);
            color: var(--primary);
            font-size: 0.8rem;
            padding: 3px 8px;
            border-radius: 4px;
        }

        /* 解决方案与服务网络 */
        .solution-tab-wrap {
            display: grid;
            grid-template-columns: 250px 1fr;
            gap: 40px;
        }
        .tab-menu {
            display: flex;
            flex-direction: column;
            gap: 10px;
        }
        .tab-btn {
            background: white;
            border: 1px solid var(--border-color);
            padding: 15px 20px;
            text-align: left;
            border-radius: 8px;
            cursor: pointer;
            font-weight: 600;
            color: var(--text-main);
            transition: all 0.3s;
        }
        .tab-btn.active, .tab-btn:hover {
            background: var(--rainbow-gradient);
            color: white;
            border-color: transparent;
        }
        .tab-pane {
            display: none;
        }
        .tab-pane.active {
            display: block;
        }

        /* 标准化流程 & 技术标准 */
        .timeline {
            position: relative;
            max-width: 800px;
            margin: 0 auto;
        }
        .timeline::before {
            content: '';
            position: absolute;
            width: 4px;
            background: var(--border-color);
            top: 0; bottom: 0; left: 50%;
            margin-left: -2px;
        }
        .timeline-item {
            padding: 10px 40px;
            position: relative;
            width: 50%;
        }
        .timeline-item:nth-child(odd) {
            left: 0;
            text-align: right;
        }
        .timeline-item:nth-child(even) {
            left: 50%;
            text-align: left;
        }
        .timeline-dot {
            width: 16px;
            height: 16px;
            border-radius: 50%;
            background: var(--accent-1);
            position: absolute;
            top: 20px;
            z-index: 1;
        }
        .timeline-item:nth-child(odd) .timeline-dot {
            right: -8px;
        }
        .timeline-item:nth-child(even) .timeline-dot {
            left: -8px;
        }

        /* 案例中心 */
        .case-media-container {
            margin-top: 40px;
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 20px;
        }
        .case-img-wrap {
            overflow: hidden;
            border-radius: 12px;
            position: relative;
            box-shadow: 0 10px 20px rgba(0,0,0,0.05);
        }
        .case-img-wrap img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            display: block;
            transition: transform 0.5s ease;
        }
        .case-img-wrap:hover img {
            transform: scale(1.05);
        }
        .case-img-overlay {
            position: absolute;
            bottom: 0; left: 0; right: 0;
            background: linear-gradient(transparent, rgba(0,0,0,0.8));
            padding: 20px;
            color: white;
        }

        /* 对比评测表格 */
        .table-responsive {
            overflow-x: auto;
            background: white;
            border-radius: 16px;
            box-shadow: 0 10px 30px rgba(0,0,0,0.05);
            border: 1px solid var(--border-color);
        }
        table {
            width: 100%;
            border-collapse: collapse;
            text-align: left;
        }
        th, td {
            padding: 16px 20px;
            border-bottom: 1px solid var(--border-color);
        }
        th {
            background-color: #F1F5F9;
            color: var(--text-main);
            font-weight: 600;
        }
        tr:last-child td {
            border-bottom: none;
        }
        .score-highlight {
            font-weight: 800;
            color: var(--accent-2);
            font-size: 1.2rem;
        }

        /* 智能匹配与比价 */
        .match-box {
            max-width: 700px;
            margin: 0 auto;
        }
        .form-group {
            margin-bottom: 20px;
        }
        .form-group label {
            display: block;
            margin-bottom: 8px;
            font-weight: 600;
        }
        .form-control {
            width: 100%;
            padding: 12px;
            border: 1.5px solid var(--border-color);
            border-radius: 8px;
            background-color: white;
            color: var(--text-main);
            outline: none;
            transition: border-color 0.3s;
        }
        .form-control:focus {
            border-color: var(--primary);
        }

        /* 培训版块 */
        .training-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
            gap: 20px;
        }
        .train-card {
            background: white;
            padding: 25px;
            border-radius: 12px;
            border: 1px solid var(--border-color);
            text-align: center;
        }
        .train-icon {
            font-size: 2rem;
            margin-bottom: 15px;
            color: var(--primary);
        }

        /* FAQ折叠面板 */
        .faq-list {
            max-width: 800px;
            margin: 0 auto;
        }
        .faq-item {
            background: white;
            border: 1px solid var(--border-color);
            border-radius: 12px;
            margin-bottom: 15px;
            overflow: hidden;
            transition: border-color 0.3s;
        }
        .faq-header {
            padding: 20px;
            cursor: pointer;
            display: flex;
            justify-content: space-between;
            align-items: center;
            font-weight: 600;
            user-select: none;
        }
        .faq-header::after {
            content: '+';
            font-size: 1.2rem;
            color: var(--primary);
            transition: transform 0.3s;
        }
        .faq-item.active {
            border-color: var(--primary-light);
        }
        .faq-item.active .faq-header::after {
            transform: rotate(45deg);
        }
        .faq-body {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.3s cubic-bezier(0.4, 0, 0.2, 1);
            background-color: #fafbfc;
        }
        .faq-content {
            padding: 20px;
            color: var(--text-muted);
            border-top: 1px solid var(--border-color);
        }

        /* 评论区 */
        .reviews-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
            gap: 25px;
        }
        .review-card {
            background: white;
            padding: 25px;
            border-radius: 12px;
            box-shadow: 0 4px 15px rgba(0,0,0,0.02);
            border-top: 4px solid var(--accent-3);
        }
        .review-user {
            display: flex;
            align-items: center;
            gap: 12px;
            margin-bottom: 15px;
        }
        .avatar-placeholder {
            width: 45px;
            height: 45px;
            border-radius: 50%;
            background: var(--rainbow-gradient);
            color: white;
            display: flex;
            align-items: center;
            justify-content: center;
            font-weight: bold;
        }
        .review-info h4 {
            font-size: 0.95rem;
            color: var(--text-main);
        }
        .review-info span {
            font-size: 0.8rem;
            color: var(--text-muted);
        }

        /* 底部与友情链接 */
        footer {
            background: #0F172A;
            color: #E2E8F0;
            padding: 60px 0 40px 0;
            border-top: 1px solid rgba(255,255,255,0.1);
        }
        .footer-cols {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr 1.5fr;
            gap: 40px;
            margin-bottom: 40px;
        }
        .footer-col h4 {
            color: #ffffff;
            margin-bottom: 20px;
            font-size: 1.1rem;
        }
        .footer-col ul {
            list-style: none;
        }
        .footer-col ul li {
            margin-bottom: 10px;
        }
        .footer-col ul li a {
            color: #94A3B8;
            text-decoration: none;
            transition: color 0.3s;
        }
        .footer-col ul li a:hover {
            color: #ffffff;
        }
        .friend-links {
            display: flex;
            flex-wrap: wrap;
            gap: 12px;
            margin-top: 10px;
        }
        .friend-links a {
            color: #94A3B8;
            text-decoration: none;
            background: rgba(255,255,255,0.05);
            padding: 4px 10px;
            border-radius: 4px;
            font-size: 0.85rem;
            transition: all 0.3s;
        }
        .friend-links a:hover {
            color: #ffffff;
            background: rgba(255,255,255,0.1);
        }
        .copyright-bar {
            border-top: 1px solid rgba(255,255,255,0.1);
            padding-top: 25px;
            display: flex;
            justify-content: space-between;
            align-items: center;
            flex-wrap: wrap;
            gap: 20px;
            font-size: 0.85rem;
            color: #64748B;
        }
        .copyright-bar a {
            color: #64748B;
            text-decoration: none;
        }
        .copyright-bar a:hover {
            color: #ffffff;
        }

        /* 浮动组件 */
        .floating-kefu {
            position: fixed;
            bottom: 30px;
            right: 30px;
            z-index: 99;
            background: white;
            border: 1px solid var(--border-color);
            border-radius: 12px;
            box-shadow: 0 10px 25px rgba(0,0,0,0.1);
            width: 140px;
            padding: 15px;
            text-align: center;
            transition: transform 0.3s;
        }
        .floating-kefu:hover {
            transform: translateY(-5px);
        }
        .floating-kefu img {
            width: 100%;
            height: auto;
            border-radius: 6px;
            margin-bottom: 8px;
        }
        .floating-kefu p {
            font-size: 0.8rem;
            font-weight: 600;
            color: var(--text-main);
        }

        /* 术语百科 & 自助排查样式 */
        .term-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
            gap: 20px;
        }
        .term-card {
            background: white;
            border-left: 4px solid var(--primary);
            padding: 20px;
            border-radius: 0 12px 12px 0;
            box-shadow: 0 2px 10px rgba(0,0,0,0.02);
        }
        .troubleshoot-box {
            background: #FEF2F2;
            border: 1px solid #FEE2E2;
            border-radius: 12px;
            padding: 25px;
            margin-bottom: 30px;
        }
        .troubleshoot-title {
            color: #991B1B;
            font-weight: 700;
            margin-bottom: 15px;
            font-size: 1.1rem;
        }
        .troubleshoot-list {
            list-style-type: decimal;
            padding-left: 20px;
            color: #7F1D1D;
        }
        .troubleshoot-list li {
            margin-bottom: 8px;
        }

        /* 响应式调整 */
        @media(max-width: 992px) {
            .about-wrap {
                grid-template-columns: 1fr;
            }
            .solution-tab-wrap {
                grid-template-columns: 1fr;
            }
            .footer-cols {
                grid-template-columns: 1fr 1fr;
            }
        }
        @media(max-width: 768px) {
            .nav-links {
                display: none;
                flex-direction: column;
                position: absolute;
                top: 70px;
                left: 0;
                right: 0;
                background: white;
                border-bottom: 1px solid var(--border-color);
                padding: 20px;
                box-shadow: 0 10px 15px rgba(0,0,0,0.05);
            }
            .nav-links.active {
                display: flex;
            }
            .menu-toggle {
                display: block;
            }
            .timeline::before {
                left: 20px;
            }
            .timeline-item {
                width: 100%;
                padding-left: 40px;
                padding-right: 0;
            }
            .timeline-item:nth-child(odd), .timeline-item:nth-child(even) {
                left: 0;
                text-align: left;
            }
            .timeline-item:nth-child(odd) .timeline-dot, .timeline-item:nth-child(even) .timeline-dot {
                left: 12px;
            }
            .footer-cols {
                grid-template-columns: 1fr;
            }
            .case-media-container {
                grid-template-columns: 1fr;
            }
        }