:root {
            --primary: #0052d9;
            --primary-light: #e3ecff;
            --accent: #ff9900;
            --accent-glow: rgba(255, 153, 0, 0.15);
            --bg-base: #f8fafc;
            --bg-card: #ffffff;
            --text-title: #0f172a;
            --text-body: #334155;
            --text-muted: #64748b;
            --border-color: #e2e8f0;
            --max-width: 1200px;
            --shadow-sm: 0 2px 8px rgba(0,0,0,0.04);
            --shadow-md: 0 8px 24px rgba(0,0,0,0.06);
            --shadow-lg: 0 16px 40px rgba(0,0,0,0.08);
            --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-base);
            color: var(--text-body);
            line-height: 1.6;
            overflow-x: hidden;
        }

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

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

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

        /* 顶部导航 */
        header {
            background-color: rgba(255, 255, 255, 0.95);
            backdrop-filter: blur(8px);
            border-bottom: 1px solid var(--border-color);
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            z-index: 1000;
        }

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

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

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

        .brand-name {
            font-size: 1.25rem;
            font-weight: 800;
            color: var(--primary);
            letter-spacing: 1px;
        }

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

        .nav-links {
            display: flex;
            gap: 24px;
            list-style: none;
        }

        .nav-links a {
            color: var(--text-title);
            font-weight: 500;
            font-size: 0.95rem;
        }

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

        .nav-btn {
            background-color: var(--primary);
            color: white !important;
            padding: 8px 20px;
            border-radius: 6px;
            font-weight: 600;
            font-size: 0.9rem;
            box-shadow: 0 4px 12px rgba(0, 82, 217, 0.2);
        }

        .nav-btn:hover {
            background-color: var(--accent);
            box-shadow: 0 4px 12px var(--accent-glow);
        }

        .menu-toggle {
            display: none;
            background: none;
            border: none;
            font-size: 1.5rem;
            color: var(--text-title);
            cursor: pointer;
        }

        /* Hero首屏 - 极致鲜亮, 严禁图片 */
        .hero {
            padding: 160px 0 100px 0;
            background: linear-gradient(135deg, #e0f2fe 0%, #dbeafe 50%, #eff6ff 100%);
            position: relative;
            overflow: hidden;
            text-align: center;
        }

        .hero::before {
            content: '';
            position: absolute;
            width: 300px;
            height: 300px;
            background: radial-gradient(circle, rgba(0, 82, 217, 0.1) 0%, transparent 70%);
            top: -50px;
            left: -50px;
        }

        .hero::after {
            content: '';
            position: absolute;
            width: 400px;
            height: 400px;
            background: radial-gradient(circle, rgba(255, 153, 0, 0.08) 0%, transparent 70%);
            bottom: -100px;
            right: -50px;
        }

        .hero-tag {
            display: inline-block;
            background-color: var(--primary-light);
            color: var(--primary);
            font-size: 0.9rem;
            font-weight: 700;
            padding: 6px 16px;
            border-radius: 20px;
            margin-bottom: 20px;
        }

        .hero h1 {
            font-size: 2.8rem;
            font-weight: 800;
            color: var(--text-title);
            line-height: 1.3;
            margin-bottom: 24px;
            letter-spacing: -0.5px;
        }

        .hero p {
            font-size: 1.2rem;
            color: var(--text-body);
            max-width: 800px;
            margin: 0 auto 36px auto;
        }

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

        .btn-main {
            background-color: var(--primary);
            color: white;
            padding: 14px 32px;
            border-radius: 8px;
            font-weight: 700;
            font-size: 1.05rem;
            box-shadow: 0 8px 20px rgba(0, 82, 217, 0.25);
            display: inline-flex;
            align-items: center;
            gap: 8px;
        }

        .btn-main:hover {
            background-color: var(--accent);
            color: white;
            box-shadow: 0 8px 20px var(--accent-glow);
            transform: translateY(-2px);
        }

        .btn-sub {
            background-color: white;
            color: var(--text-title);
            border: 1px solid var(--border-color);
            padding: 14px 32px;
            border-radius: 8px;
            font-weight: 700;
            font-size: 1.05rem;
            box-shadow: var(--shadow-sm);
        }

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

        /* 数据指标卡片 */
        .stats-section {
            margin-top: -40px;
            position: relative;
            z-index: 10;
        }

        .stats-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 20px;
        }

        .stat-card {
            background-color: var(--bg-card);
            border-radius: 12px;
            padding: 24px;
            box-shadow: var(--shadow-md);
            text-align: center;
            border: 1px solid var(--border-color);
            transition: var(--transition);
        }

        .stat-card:hover {
            transform: translateY(-5px);
            box-shadow: var(--shadow-lg);
            border-color: var(--primary);
        }

        .stat-num {
            font-size: 2.2rem;
            font-weight: 800;
            color: var(--primary);
            margin-bottom: 6px;
        }

        .stat-label {
            font-size: 0.95rem;
            color: var(--text-muted);
            font-weight: 600;
        }

        /* 通用区块设置 */
        section {
            padding: 90px 0;
        }

        .section-header {
            text-align: center;
            max-width: 700px;
            margin: 0 auto 50px auto;
        }

        .section-header h2 {
            font-size: 2.2rem;
            font-weight: 800;
            color: var(--text-title);
            margin-bottom: 16px;
            position: relative;
            display: inline-block;
        }

        .section-header h2::after {
            content: '';
            position: absolute;
            bottom: -6px;
            left: 50%;
            transform: translateX(-50%);
            width: 60px;
            height: 4px;
            background-color: var(--accent);
            border-radius: 2px;
        }

        .section-header p {
            font-size: 1.05rem;
            color: var(--text-muted);
        }

        /* 关于我们与软件介绍 */
        .about-grid {
            display: grid;
            grid-template-columns: 1.1fr 0.9fr;
            gap: 40px;
            align-items: center;
        }

        .about-info h3 {
            font-size: 1.6rem;
            color: var(--text-title);
            margin-bottom: 20px;
        }

        .about-info p {
            color: var(--text-body);
            margin-bottom: 20px;
            font-size: 1.05rem;
        }

        .feature-bullets {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 16px;
            margin-top: 30px;
        }

        .bullet-item {
            display: flex;
            align-items: center;
            gap: 10px;
            font-weight: 600;
        }

        .bullet-icon {
            width: 20px;
            height: 20px;
            background-color: var(--primary-light);
            color: var(--primary);
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 0.8rem;
        }

        .about-card-box {
            background-color: white;
            border-radius: 16px;
            padding: 36px;
            border: 1px solid var(--border-color);
            box-shadow: var(--shadow-md);
        }

        .about-card-box h4 {
            font-size: 1.3rem;
            color: var(--text-title);
            margin-bottom: 24px;
            border-left: 4px solid var(--primary);
            padding-left: 12px;
        }

        /* AIGC 服务体系 */
        .service-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 30px;
        }

        .service-card {
            background-color: white;
            border-radius: 12px;
            padding: 30px;
            border: 1px solid var(--border-color);
            box-shadow: var(--shadow-sm);
            transition: var(--transition);
        }

        .service-card:hover {
            transform: translateY(-8px);
            box-shadow: var(--shadow-lg);
            border-color: var(--primary);
        }

        .service-icon {
            width: 50px;
            height: 50px;
            background-color: var(--primary-light);
            border-radius: 10px;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.5rem;
            color: var(--primary);
            margin-bottom: 20px;
        }

        .service-card h3 {
            font-size: 1.25rem;
            margin-bottom: 12px;
            color: var(--text-title);
        }

        .service-card p {
            color: var(--text-muted);
            font-size: 0.95rem;
        }

        /* 模型云集标签 */
        .tag-cloud-wrapper {
            margin-top: 50px;
            background-color: white;
            padding: 30px;
            border-radius: 16px;
            border: 1px solid var(--border-color);
        }

        .tag-cloud-title {
            text-align: center;
            font-weight: 700;
            color: var(--text-title);
            margin-bottom: 20px;
        }

        .tag-cloud {
            display: flex;
            flex-wrap: wrap;
            justify-content: center;
            gap: 10px;
        }

        .tag-item {
            background-color: var(--bg-base);
            color: var(--text-body);
            padding: 6px 14px;
            border-radius: 20px;
            font-size: 0.85rem;
            font-weight: 600;
            border: 1px solid var(--border-color);
            transition: var(--transition);
        }

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

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

        .timeline::before {
            content: '';
            position: absolute;
            top: 0;
            bottom: 0;
            left: 50%;
            width: 4px;
            background-color: var(--primary-light);
            transform: translateX(-50%);
        }

        .timeline-item {
            position: relative;
            margin-bottom: 50px;
            width: 50%;
            padding-right: 40px;
            text-align: right;
        }

        .timeline-item:nth-child(even) {
            left: 50%;
            padding-right: 0;
            padding-left: 40px;
            text-align: left;
        }

        .timeline-badge {
            position: absolute;
            top: 0;
            right: -16px;
            width: 32px;
            height: 32px;
            border-radius: 50%;
            background-color: var(--primary);
            color: white;
            display: flex;
            align-items: center;
            justify-content: center;
            font-weight: 700;
            z-index: 5;
            box-shadow: 0 0 0 4px white;
        }

        .timeline-item:nth-child(even) .timeline-badge {
            left: -16px;
            right: auto;
        }

        .timeline-panel {
            background-color: white;
            border-radius: 12px;
            padding: 24px;
            box-shadow: var(--shadow-sm);
            border: 1px solid var(--border-color);
        }

        .timeline-panel h3 {
            font-size: 1.15rem;
            margin-bottom: 8px;
            color: var(--text-title);
        }

        .timeline-panel p {
            font-size: 0.9rem;
            color: var(--text-muted);
        }

        /* 对比评测 */
        .review-panel {
            background-color: white;
            border-radius: 16px;
            padding: 40px;
            border: 1px solid var(--border-color);
            box-shadow: var(--shadow-md);
            margin-bottom: 40px;
            display: flex;
            align-items: center;
            justify-content: space-between;
            flex-wrap: wrap;
            gap: 30px;
        }

        .review-score-box {
            text-align: center;
            flex: 1;
            min-width: 200px;
        }

        .score-big {
            font-size: 4rem;
            font-weight: 900;
            color: var(--accent);
            line-height: 1;
        }

        .stars {
            color: var(--accent);
            font-size: 1.5rem;
            margin: 10px 0;
        }

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

        table {
            width: 100%;
            border-collapse: collapse;
            text-align: left;
            margin-top: 20px;
        }

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

        th {
            background-color: var(--bg-base);
            font-weight: 700;
            color: var(--text-title);
        }

        td strong {
            color: var(--primary);
        }

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

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

        .case-img-box {
            position: relative;
            overflow: hidden;
            aspect-ratio: 16/10;
            background-color: var(--bg-base);
        }

        .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: 20px;
        }

        .case-tag {
            font-size: 0.75rem;
            background-color: var(--primary-light);
            color: var(--primary);
            padding: 3px 8px;
            border-radius: 4px;
            font-weight: 600;
            display: inline-block;
            margin-bottom: 10px;
        }

        .case-body h3 {
            font-size: 1.1rem;
            margin-bottom: 8px;
            color: var(--text-title);
        }

        .case-body p {
            font-size: 0.85rem;
            color: var(--text-muted);
        }

        /* 全国服务网络 */
        .network-section {
            background-color: white;
        }

        .network-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 40px;
            align-items: center;
        }

        .network-map {
            background: radial-gradient(circle, #e0f2fe 10%, transparent 70%);
            border-radius: 16px;
            padding: 40px;
            display: flex;
            align-items: center;
            justify-content: center;
            border: 1px dashed var(--primary);
            min-height: 300px;
        }

        .map-placeholder {
            text-align: center;
        }

        .map-placeholder svg {
            width: 60px;
            height: 60px;
            fill: var(--primary);
            margin-bottom: 15px;
        }

        /* 培训版块 */
        .training-grid {
            display: grid;
            grid-template-columns: repeat(5, 1fr);
            gap: 16px;
        }

        .training-card {
            background-color: white;
            border-radius: 10px;
            padding: 20px;
            text-align: center;
            border: 1px solid var(--border-color);
            transition: var(--transition);
        }

        .training-card:hover {
            border-color: var(--primary);
            box-shadow: var(--shadow-md);
            transform: translateY(-4px);
        }

        .training-card h3 {
            font-size: 1rem;
            color: var(--text-title);
            margin-bottom: 10px;
        }

        /* 术语百科 & 自助排查 */
        .meta-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 30px;
        }

        .meta-box {
            background-color: white;
            border-radius: 14px;
            padding: 30px;
            border: 1px solid var(--border-color);
        }

        .meta-box h3 {
            font-size: 1.3rem;
            margin-bottom: 20px;
            color: var(--text-title);
            display: flex;
            align-items: center;
            gap: 10px;
        }

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

        .meta-list li {
            padding: 12px 0;
            border-bottom: 1px solid var(--border-color);
        }

        .meta-list li:last-child {
            border-bottom: none;
        }

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

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

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

        .faq-trigger {
            width: 100%;
            padding: 18px 24px;
            text-align: left;
            background: none;
            border: none;
            font-size: 1.05rem;
            font-weight: 700;
            color: var(--text-title);
            cursor: pointer;
            display: flex;
            justify-content: space-between;
            align-items: center;
        }

        .faq-trigger::after {
            content: '+';
            font-size: 1.4rem;
            color: var(--primary);
            transition: var(--transition);
        }

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

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

        .faq-content-inner {
            padding: 20px 24px;
            color: var(--text-body);
            border-top: 1px solid var(--border-color);
            font-size: 0.95rem;
        }

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

        .comment-card {
            background-color: white;
            border-radius: 12px;
            padding: 24px;
            border: 1px solid var(--border-color);
            box-shadow: var(--shadow-sm);
        }

        .comment-header {
            display: flex;
            align-items: center;
            gap: 12px;
            margin-bottom: 16px;
        }

        .avatar-placeholder {
            width: 40px;
            height: 40px;
            border-radius: 50%;
            background-color: var(--primary-light);
            color: var(--primary);
            font-weight: 700;
            display: flex;
            align-items: center;
            justify-content: center;
        }

        .commenter-info h4 {
            font-size: 0.95rem;
            color: var(--text-title);
        }

        .commenter-info p {
            font-size: 0.75rem;
            color: var(--text-muted);
        }

        .comment-text {
            font-size: 0.9rem;
            color: var(--text-body);
        }

        /* 资讯知识库 */
        .news-grid {
            display: grid;
            grid-template-columns: repeat(5, 1fr);
            gap: 16px;
        }

        .news-card {
            background-color: white;
            border-radius: 8px;
            padding: 16px;
            border: 1px solid var(--border-color);
            display: flex;
            flex-direction: column;
            justify-content: space-between;
            min-height: 150px;
        }

        .news-card h3 {
            font-size: 0.9rem;
            color: var(--text-title);
            margin-bottom: 12px;
            display: -webkit-box;
            -webkit-line-clamp: 3;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }

        .news-card a {
            font-size: 0.8rem;
            font-weight: 700;
        }

        /* 联系我们与表单 */
        .contact-grid {
            display: grid;
            grid-template-columns: 1.2fr 0.8fr;
            gap: 40px;
        }

        .form-box {
            background-color: white;
            border-radius: 16px;
            padding: 40px;
            border: 1px solid var(--border-color);
            box-shadow: var(--shadow-md);
        }

        .form-group-row {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 16px;
        }

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

        .form-group label {
            display: block;
            font-weight: 600;
            margin-bottom: 8px;
            color: var(--text-title);
            font-size: 0.9rem;
        }

        .form-control {
            width: 100%;
            padding: 12px 16px;
            border: 1px solid var(--border-color);
            border-radius: 6px;
            font-size: 0.95rem;
            background-color: var(--bg-base);
        }

        .form-control:focus {
            outline: none;
            border-color: var(--primary);
            background-color: white;
        }

        .form-submit-btn {
            width: 100%;
            background-color: var(--primary);
            color: white;
            padding: 14px;
            border: none;
            border-radius: 6px;
            font-weight: 700;
            font-size: 1rem;
            cursor: pointer;
            transition: var(--transition);
        }

        .form-submit-btn:hover {
            background-color: var(--accent);
        }

        .contact-info-box {
            background-color: white;
            border-radius: 16px;
            padding: 40px;
            border: 1px solid var(--border-color);
            display: flex;
            flex-direction: column;
            justify-content: space-between;
        }

        .contact-item {
            margin-bottom: 24px;
        }

        .contact-item h4 {
            font-size: 1rem;
            color: var(--text-title);
            margin-bottom: 6px;
        }

        .contact-item p {
            font-size: 0.95rem;
            color: var(--text-muted);
        }

        .kefu-qrcode {
            text-align: center;
            padding: 15px;
            background-color: var(--bg-base);
            border-radius: 8px;
            border: 1px dashed var(--border-color);
        }

        .kefu-qrcode img {
            width: 120px;
            height: 120px;
            margin-bottom: 8px;
        }

        /* 友情链接与页脚 */
        footer {
            background-color: #0f172a;
            color: #94a3b8;
            padding: 60px 0 30px 0;
            font-size: 0.9rem;
        }

        .footer-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 40px;
            margin-bottom: 40px;
        }

        .footer-col h4 {
            color: white;
            font-size: 1rem;
            margin-bottom: 20px;
            position: relative;
        }

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

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

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

        .footer-links a:hover {
            color: white;
        }

        .footer-bottom {
            border-top: 1px solid #1e293b;
            padding-top: 30px;
            display: flex;
            justify-content: space-between;
            align-items: center;
            flex-wrap: wrap;
            gap: 20px;
        }

        .footer-links-inline {
            display: flex;
            gap: 16px;
            flex-wrap: wrap;
        }

        .footer-links-inline a {
            color: #94a3b8;
            font-size: 0.85rem;
        }

        .footer-links-inline a:hover {
            color: white;
        }

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

        .float-btn {
            width: 50px;
            height: 50px;
            background-color: var(--primary);
            color: white;
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            box-shadow: 0 4px 12px rgba(0,0,0,0.15);
            cursor: pointer;
            position: relative;
        }

        .float-btn:hover {
            background-color: var(--accent);
        }

        .float-qrcode-hover {
            position: absolute;
            right: 60px;
            bottom: 0;
            background-color: white;
            padding: 10px;
            border-radius: 8px;
            box-shadow: var(--shadow-lg);
            border: 1px solid var(--border-color);
            display: none;
            text-align: center;
        }

        .float-qrcode-hover img {
            width: 100px;
            height: 100px;
        }

        .float-qrcode-hover p {
            color: var(--text-title);
            font-size: 0.75rem;
            margin-top: 5px;
            white-space: nowrap;
        }

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

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

        @media (max-width: 768px) {
            .nav-links, .nav-btn {
                display: none;
            }
            .menu-toggle {
                display: block;
            }
            .nav-container.active .nav-links {
                display: flex;
                flex-direction: column;
                position: absolute;
                top: 70px;
                left: 0;
                right: 0;
                background-color: white;
                padding: 20px;
                border-bottom: 1px solid var(--border-color);
                box-shadow: var(--shadow-md);
            }
            .hero h1 {
                font-size: 2rem;
            }
            .about-grid, .network-grid, .meta-grid, .contact-grid {
                grid-template-columns: 1fr;
            }
            .timeline::before {
                left: 20px;
            }
            .timeline-item {
                width: 100%;
                padding-left: 50px;
                padding-right: 0;
                text-align: left;
            }
            .timeline-item:nth-child(even) {
                left: 0;
                padding-left: 50px;
            }
            .timeline-badge {
                left: 4px !important;
                right: auto;
            }
            .training-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .news-grid {
                grid-template-columns: repeat(2, 1fr);
            }
        }

        @media (max-width: 480px) {
            .stats-grid, .service-grid, .cases-grid, .comments-grid, .training-grid, .news-grid, .footer-grid {
                grid-template-columns: 1fr;
            }
            .form-group-row {
                grid-template-columns: 1fr;
            }
        }