/* 撞色艳色风 - 浅色基调配置 */
        :root {
            --bg-main: #f8fafc;
            --bg-card: #ffffff;
            --text-dark: #0f172a;
            --text-muted: #475569;
            --primary: #6366f1; /* 科技靛蓝 */
            --accent-orange: #ff4500; /* 强撞色活力橙红 */
            --accent-cyan: #00d2ff; /* 霓虹青 */
            --border-color: #e2e8f0;
            --container-width: 1200px;
            --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-main);
            color: var(--text-dark);
            line-height: 1.6;
            overflow-x: hidden;
        }

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

        a:hover {
            color: var(--accent-orange);
        }

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

        .container {
            width: 100%;
            max-width: var(--container-width);
            margin: 0 auto;
            padding: 0 24px;
        }

        /* 导航栏 */
        header {
            background-color: rgba(255, 255, 255, 0.95);
            backdrop-filter: blur(8px);
            border-bottom: 3px solid var(--primary);
            position: sticky;
            top: 0;
            z-index: 1000;
        }

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

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

        .ai-page-logo {
            height: 40px;
            width: auto;
        }

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

        .nav-menu a {
            font-weight: 600;
            color: var(--text-dark);
            font-size: 14px;
            padding: 8px 12px;
            border-radius: 4px;
        }

        .nav-menu a:hover {
            background-color: #f1f5f9;
            color: var(--primary);
        }

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

        /* 首屏 Hero 区 (绝对无图，CSS渐变与撞色块) */
        .hero {
            position: relative;
            background: radial-gradient(circle at 80% 20%, rgba(0, 210, 255, 0.15) 0%, transparent 50%),
                        radial-gradient(circle at 10% 80%, rgba(255, 69, 0, 0.1) 0%, transparent 50%),
                        linear-gradient(135deg, #ffffff 0%, #f1f5f9 100%);
            padding: 120px 0 100px 0;
            border-bottom: 1px solid var(--border-color);
            overflow: hidden;
        }

        .hero::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            width: 100%;
            height: 8px;
            background: linear-gradient(90deg, var(--primary), var(--accent-orange), var(--accent-cyan));
        }

        .hero-content {
            text-align: center;
            max-width: 800px;
            margin: 0 auto;
        }

        .hero-tag {
            display: inline-block;
            background: linear-gradient(90deg, var(--primary), var(--accent-orange));
            color: #ffffff;
            font-size: 12px;
            font-weight: 700;
            padding: 6px 16px;
            border-radius: 50px;
            margin-bottom: 24px;
            text-transform: uppercase;
            letter-spacing: 1px;
            box-shadow: 0 4px 10px rgba(255, 69, 0, 0.2);
        }

        .hero h1 {
            font-size: 44px;
            font-weight: 800;
            line-height: 1.25;
            color: var(--text-dark);
            margin-bottom: 24px;
            letter-spacing: -1px;
        }

        .hero h1 span {
            background: linear-gradient(90deg, var(--primary), var(--accent-orange));
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
        }

        .hero p {
            font-size: 18px;
            color: var(--text-muted);
            margin-bottom: 40px;
        }

        .hero-btns {
            display: flex;
            justify-content: center;
            gap: 16px;
            flex-wrap: wrap;
        }

        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            padding: 14px 28px;
            font-size: 15px;
            font-weight: 700;
            border-radius: 8px;
            transition: var(--transition);
            cursor: pointer;
        }

        .btn-primary {
            background-color: var(--accent-orange);
            color: #ffffff;
            border: 2px solid var(--accent-orange);
            box-shadow: 0 4px 14px rgba(255, 69, 0, 0.3);
        }

        .btn-primary:hover {
            background-color: #d03500;
            border-color: #d03500;
            transform: translateY(-2px);
        }

        .btn-secondary {
            background-color: transparent;
            color: var(--text-dark);
            border: 2px solid var(--text-dark);
        }

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

        /* 通用区块样式 */
        section {
            padding: 90px 0;
            border-bottom: 1px solid var(--border-color);
        }

        .section-header {
            text-align: center;
            margin-bottom: 60px;
        }

        .section-header h2 {
            font-size: 32px;
            font-weight: 800;
            color: var(--text-dark);
            margin-bottom: 16px;
            position: relative;
            display: inline-block;
        }

        .section-header h2::after {
            content: '';
            position: absolute;
            bottom: -8px;
            left: 50%;
            transform: translateX(-50%);
            width: 60px;
            height: 4px;
            background-color: var(--accent-orange);
        }

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

        /* 数据指标卡片 */
        .stats-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 24px;
        }

        .stat-card {
            background-color: var(--bg-card);
            border: 1px solid var(--border-color);
            padding: 30px 24px;
            border-radius: 12px;
            text-align: center;
            box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.05);
            transition: var(--transition);
        }

        .stat-card:hover {
            transform: translateY(-6px);
            border-color: var(--primary);
            box-shadow: 0 20px 25px -5px rgba(99, 102, 241, 0.1), 0 10px 10px -5px rgba(99, 102, 241, 0.04);
        }

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

        .stat-label {
            font-size: 14px;
            color: var(--text-muted);
            font-weight: 600;
        }

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

        .service-card {
            background-color: var(--bg-card);
            border: 1px solid var(--border-color);
            border-top: 4px solid var(--primary);
            padding: 40px 30px;
            border-radius: 12px;
            transition: var(--transition);
        }

        .service-card:hover {
            transform: translateY(-8px);
            border-top-color: var(--accent-orange);
            box-shadow: 0 20px 25px -5px rgba(0, 0, 0, 0.1);
        }

        .service-card h3 {
            font-size: 20px;
            font-weight: 700;
            margin-bottom: 16px;
        }

        .service-card p {
            color: var(--text-muted);
            font-size: 14px;
            margin-bottom: 20px;
        }

        .model-tags {
            display: flex;
            flex-wrap: wrap;
            gap: 8px;
        }

        .model-tag {
            background-color: #f1f5f9;
            color: var(--text-dark);
            font-size: 11px;
            padding: 4px 10px;
            border-radius: 4px;
            font-weight: 600;
        }

        /* 制作流程 & 时间线 */
        .process-timeline {
            position: relative;
            max-width: 900px;
            margin: 0 auto;
        }

        .process-step {
            display: flex;
            margin-bottom: 50px;
            position: relative;
        }

        .process-step::before {
            content: '';
            position: absolute;
            left: 28px;
            top: 60px;
            bottom: -60px;
            width: 2px;
            background-color: var(--border-color);
        }

        .process-step:last-child::before {
            display: none;
        }

        .process-icon {
            width: 58px;
            height: 58px;
            border-radius: 50px;
            background-color: var(--primary);
            color: #ffffff;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 22px;
            font-weight: 800;
            z-index: 2;
            flex-shrink: 0;
            box-shadow: 0 4px 10px rgba(99, 102, 241, 0.4);
        }

        .process-step:nth-child(even) .process-icon {
            background-color: var(--accent-orange);
            box-shadow: 0 4px 10px rgba(255, 69, 0, 0.4);
        }

        .process-body {
            padding-left: 30px;
            padding-top: 10px;
        }

        .process-body h3 {
            font-size: 20px;
            font-weight: 700;
            margin-bottom: 8px;
        }

        .process-body p {
            color: var(--text-muted);
            font-size: 15px;
        }

        /* 对比评测表格 */
        .table-responsive {
            overflow-x: auto;
            margin: 0 auto;
            max-width: 1000px;
        }

        table {
            width: 100%;
            border-collapse: collapse;
            background-color: var(--bg-card);
            border-radius: 8px;
            overflow: hidden;
            box-shadow: 0 4px 10px rgba(0,0,0,0.05);
            border: 1px solid var(--border-color);
        }

        th, td {
            padding: 18px 24px;
            text-align: left;
            border-bottom: 1px solid var(--border-color);
        }

        th {
            background-color: #f1f5f9;
            font-weight: 700;
        }

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

        .rating-box {
            display: flex;
            align-items: center;
            gap: 12px;
            background-color: #fffbeb;
            border: 1.5px solid #fef3c7;
            padding: 20px;
            border-radius: 8px;
            max-width: 1000px;
            margin: 0 auto 30px auto;
        }

        .rating-num {
            font-size: 32px;
            font-weight: 800;
            color: #d97706;
        }

        .rating-stars {
            color: #fbbf24;
            font-size: 20px;
        }

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

        .training-card {
            background-color: var(--bg-card);
            border: 1px solid var(--border-color);
            padding: 24px;
            border-radius: 8px;
            text-align: center;
            transition: var(--transition);
        }

        .training-card:hover {
            border-color: var(--accent-cyan);
            box-shadow: 0 10px 20px rgba(0, 210, 255, 0.1);
            transform: translateY(-4px);
        }

        .training-card h3 {
            font-size: 16px;
            font-weight: 700;
            color: var(--text-dark);
            margin-bottom: 10px;
        }

        /* 案例展示区 */
        .case-grid {
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: 30px;
        }

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

        .case-card:hover {
            box-shadow: 0 20px 25px -5px rgba(0,0,0,0.1);
        }

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

        .case-img-wrap img {
            width: 100%;
            height: 100%;
            object-fit: cover;
        }

        .case-content {
            padding: 24px;
        }

        .case-content h3 {
            font-size: 18px;
            font-weight: 700;
            margin-bottom: 10px;
        }

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

        /* 需求匹配表单 */
        .form-section {
            background-color: #f1f5f9;
        }

        .form-container {
            max-width: 700px;
            margin: 0 auto;
            background-color: var(--bg-card);
            padding: 40px;
            border-radius: 12px;
            box-shadow: 0 10px 30px rgba(0, 0, 0, 0.05);
            border-top: 5px solid var(--accent-orange);
        }

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

        .form-group 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: 6px;
            font-size: 15px;
            background-color: #f8fafc;
            color: var(--text-dark);
            transition: var(--transition);
        }

        .form-control:focus {
            outline: none;
            border-color: var(--primary);
            background-color: #ffffff;
            box-shadow: 0 0 0 3px rgba(99, 102, 241, 0.15);
        }

        select.form-control {
            appearance: none;
            background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' fill='none' viewBox='0 0 24 24' stroke='%23475569'%3E%3Cpath stroke-linecap='round' stroke-linejoin='round' stroke-width='2' d='M19 9l-7 7-7-7'/%3E%3C/svg%3E");
            background-repeat: no-repeat;
            background-position: right 16px center;
            background-size: 16px;
            padding-right: 40px;
        }

        /* FAQ折叠面板 */
        .faq-wrapper {
            max-width: 900px;
            margin: 0 auto;
        }

        .faq-item {
            background-color: var(--bg-card);
            border: 1px solid var(--border-color);
            border-radius: 8px;
            margin-bottom: 12px;
            overflow: hidden;
            transition: var(--transition);
        }

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

        .faq-header:hover {
            background-color: #f8fafc;
        }

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

        .faq-item.active .faq-header::after {
            content: '-';
            transform: rotate(180deg);
        }

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

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

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

        .review-card {
            background-color: var(--bg-card);
            border: 1px solid var(--border-color);
            padding: 24px;
            border-radius: 12px;
            position: relative;
        }

        .review-card::before {
            content: '“';
            position: absolute;
            top: 10px;
            right: 20px;
            font-size: 60px;
            color: #e2e8f0;
            font-family: Georgia, serif;
            line-height: 1;
        }

        .review-text {
            font-size: 14px;
            color: var(--text-muted);
            margin-bottom: 20px;
            position: relative;
            z-index: 1;
        }

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

        .user-avatar {
            width: 44px;
            height: 44px;
            border-radius: 50%;
            background-color: var(--primary);
            color: #ffffff;
            display: flex;
            align-items: center;
            justify-content: center;
            font-weight: 700;
            font-size: 14px;
        }

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

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

        /* 术语百科与排查指南 */
        .meta-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 30px;
        }

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

        .meta-box h3 {
            font-size: 20px;
            margin-bottom: 20px;
            border-bottom: 2px solid var(--primary);
            padding-bottom: 8px;
        }

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

        .meta-list li {
            margin-bottom: 12px;
            font-size: 14px;
        }

        .meta-list strong {
            color: var(--accent-orange);
        }

        /* 资讯 / 知识库 */
        .news-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 24px;
        }

        .news-card {
            background-color: var(--bg-card);
            border: 1px solid var(--border-color);
            padding: 24px;
            border-radius: 8px;
            transition: var(--transition);
        }

        .news-card:hover {
            border-color: var(--primary);
            box-shadow: 0 10px 15px -3px rgba(0,0,0,0.05);
        }

        .news-date {
            font-size: 12px;
            color: var(--text-muted);
            margin-bottom: 8px;
        }

        .news-card h3 {
            font-size: 16px;
            margin-bottom: 12px;
        }

        /* 友情链接 */
        .friendship-links {
            padding: 30px 0;
            background-color: #f1f5f9;
            border-bottom: 1px solid var(--border-color);
            text-align: center;
        }

        .friendship-links span {
            font-weight: 700;
            margin-right: 15px;
            color: var(--text-dark);
        }

        .friendship-links a {
            margin: 0 10px;
            font-size: 14px;
            color: var(--text-muted);
        }

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

        /* 页脚 */
        footer {
            background-color: #0f172a;
            color: #94a3b8;
            padding: 60px 0 30px 0;
            font-size: 14px;
        }

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

        .footer-logo img {
            height: 40px;
            margin-bottom: 15px;
        }

        .footer-title {
            color: #ffffff;
            font-size: 16px;
            font-weight: 700;
            margin-bottom: 20px;
        }

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

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

        .footer-links a {
            color: #94a3b8;
        }

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

        .footer-qrcode {
            display: flex;
            align-items: center;
            gap: 15px;
        }

        .footer-qrcode img {
            width: 90px;
            height: 90px;
            border-radius: 6px;
            background-color: #fff;
            padding: 4px;
        }

        .footer-bottom {
            border-top: 1px solid #334155;
            padding-top: 30px;
            text-align: center;
            font-size: 13px;
        }

        /* 悬浮客服面板 */
        .float-panel {
            position: fixed;
            right: 20px;
            bottom: 80px;
            z-index: 999;
            display: flex;
            flex-direction: column;
            gap: 10px;
        }

        .float-btn {
            width: 50px;
            height: 50px;
            border-radius: 50%;
            background-color: var(--primary);
            color: #ffffff;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 20px;
            box-shadow: 0 4px 10px rgba(0,0,0,0.15);
            cursor: pointer;
            position: relative;
            transition: var(--transition);
        }

        .float-btn:hover {
            background-color: var(--accent-orange);
            transform: scale(1.05);
        }

        .float-btn .qrcode-pop {
            display: none;
            position: absolute;
            right: 60px;
            bottom: 0;
            background: #fff;
            border: 1px solid var(--border-color);
            padding: 12px;
            border-radius: 8px;
            box-shadow: 0 10px 25px rgba(0,0,0,0.15);
            text-align: center;
            width: 140px;
        }

        .float-btn:hover .qrcode-pop {
            display: block;
        }

        .qrcode-pop img {
            width: 100%;
            margin-bottom: 8px;
        }

        .qrcode-pop p {
            color: var(--text-dark);
            font-size: 12px;
            font-weight: 700;
        }

        /* 响应式适配 */
        @media (max-width: 1024px) {
            .stats-grid { grid-template-columns: repeat(2, 1fr); }
            .services-grid { grid-template-columns: repeat(2, 1fr); }
            .training-grid { grid-template-columns: repeat(3, 1fr); }
            .reviews-grid { grid-template-columns: repeat(2, 1fr); }
        }

        @media (max-width: 768px) {
            .nav-menu {
                display: none;
                flex-direction: column;
                position: absolute;
                top: 70px;
                left: 0;
                width: 100%;
                background-color: #ffffff;
                border-bottom: 2px solid var(--primary);
                padding: 20px;
                box-shadow: 0 10px 15px rgba(0,0,0,0.05);
            }
            .nav-menu.active {
                display: flex;
            }
            .nav-toggle {
                display: block;
            }
            .hero h1 { font-size: 32px; }
            .stats-grid { grid-template-columns: 1fr; }
            .services-grid { grid-template-columns: 1fr; }
            .case-grid { grid-template-columns: 1fr; }
            .training-grid { grid-template-columns: repeat(2, 1fr); }
            .reviews-grid { grid-template-columns: 1fr; }
            .meta-grid { grid-template-columns: 1fr; }
            .news-grid { grid-template-columns: 1fr; }
            .footer-grid { grid-template-columns: 1fr; }
        }