:root {
            --primary: #0066ff;
            --primary-light: #e6f0ff;
            --secondary: #00f2fe;
            --text-main: #0f172a;
            --text-muted: #475569;
            --bg-light: #f8fafc;
            --border-color: #e2e8f0;
            --white: #ffffff;
            --accent: #ff5a00;
        }

        * {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
            font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
            scroll-behavior: smooth;
        }

        body {
            background-color: var(--white);
            color: var(--text-main);
            line-height: 1.6;
        }

        .container {
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 20px;
        }

        section {
            padding: 80px 0;
            border-bottom: 1px solid var(--border-color);
        }

        .section-title {
            text-align: center;
            font-size: 2.2rem;
            margin-bottom: 15px;
            color: var(--text-main);
            font-weight: 700;
        }

        .section-subtitle {
            text-align: center;
            font-size: 1.1rem;
            color: var(--text-muted);
            margin-bottom: 50px;
            max-width: 700px;
            margin-left: auto;
            margin-right: auto;
        }

        /* 顶部导航 */
        header {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            height: 70px;
            background: rgba(255, 255, 255, 0.95);
            backdrop-filter: blur(10px);
            border-bottom: 1px solid var(--border-color);
            z-index: 1000;
            display: flex;
            align-items: center;
        }

        .nav-container {
            display: flex;
            justify-content: space-between;
            align-items: center;
            width: 100%;
        }

        .logo-area {
            display: flex;
            align-items: center;
            gap: 10px;
        }

        .logo-area img {
            height: 40px;
        }

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

        nav a {
            text-decoration: none;
            color: var(--text-main);
            font-size: 0.95rem;
            font-weight: 500;
            transition: color 0.3s;
        }

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

        .nav-btn {
            background: var(--primary);
            color: var(--white);
            padding: 8px 18px;
            border-radius: 6px;
            text-decoration: none;
            font-weight: 500;
            transition: background 0.3s;
        }

        .nav-btn:hover {
            background: #0052cc;
        }

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

        .menu-toggle span {
            width: 25px;
            height: 3px;
            background: var(--text-main);
            border-radius: 3px;
        }

        /* Hero 首屏 - 纯文字/渐变效果，无图片 */
        .hero {
            padding: 150px 0 100px;
            background: linear-gradient(135deg, #f0f4ff 0%, #e6f0ff 100%);
            text-align: center;
            position: relative;
            overflow: hidden;
        }

        .hero::before {
            content: '';
            position: absolute;
            top: -20%;
            left: -10%;
            width: 50%;
            height: 60%;
            background: radial-gradient(circle, rgba(0, 242, 254, 0.15) 0%, transparent 70%);
            z-index: 1;
        }

        .hero-content {
            position: relative;
            z-index: 2;
            max-width: 850px;
            margin: 0 auto;
        }

        .hero h1 {
            font-size: 2.8rem;
            line-height: 1.25;
            color: var(--text-main);
            margin-bottom: 20px;
            font-weight: 800;
        }

        .hero p {
            font-size: 1.25rem;
            color: var(--text-muted);
            margin-bottom: 35px;
        }

        .hero-btn-group {
            display: flex;
            justify-content: center;
            gap: 15px;
            margin-bottom: 50px;
        }

        .btn-main {
            background: linear-gradient(90deg, var(--primary), var(--secondary));
            color: var(--white);
            padding: 15px 30px;
            font-size: 1.1rem;
            border-radius: 8px;
            text-decoration: none;
            font-weight: 600;
            box-shadow: 0 4px 15px rgba(0, 102, 255, 0.3);
            transition: transform 0.2s, box-shadow 0.2s;
        }

        .btn-main:hover {
            transform: translateY(-2px);
            box-shadow: 0 6px 20px rgba(0, 102, 255, 0.4);
        }

        .btn-sub {
            background: var(--white);
            color: var(--primary);
            border: 1px solid var(--primary);
            padding: 15px 30px;
            font-size: 1.1rem;
            border-radius: 8px;
            text-decoration: none;
            font-weight: 600;
            transition: background 0.3s, color 0.3s;
        }

        .btn-sub:hover {
            background: var(--primary-light);
        }

        /* 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(--white);
            padding: 25px 20px;
            border-radius: 12px;
            box-shadow: 0 4px 12px rgba(15, 23, 42, 0.05);
            text-align: center;
            border: 1px solid var(--border-color);
        }

        .metric-value {
            font-size: 2.2rem;
            font-weight: 700;
            color: var(--primary);
            margin-bottom: 5px;
        }

        .metric-label {
            font-size: 0.9rem;
            color: var(--text-muted);
            font-weight: 500;
        }

        /* 关于我们 */
        .about-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 40px;
            align-items: center;
        }

        .about-text h3 {
            font-size: 1.8rem;
            margin-bottom: 20px;
            color: var(--text-main);
        }

        .about-text p {
            color: var(--text-muted);
            margin-bottom: 15px;
            font-size: 1.05rem;
        }

        .about-highlight {
            background: var(--bg-light);
            padding: 20px;
            border-left: 4px solid var(--primary);
            border-radius: 0 8px 8px 0;
            margin-top: 25px;
        }

        /* 全平台AIGC服务体系 & 主打场景 */
        .services-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 30px;
        }

        .service-card {
            background: var(--white);
            border: 1px solid var(--border-color);
            border-radius: 12px;
            padding: 30px;
            transition: transform 0.3s, box-shadow 0.3s;
        }

        .service-card:hover {
            transform: translateY(-5px);
            box-shadow: 0 10px 25px rgba(0, 0, 0, 0.08);
        }

        .service-icon {
            font-size: 2.5rem;
            color: var(--primary);
            margin-bottom: 20px;
        }

        .service-card h3 {
            font-size: 1.3rem;
            margin-bottom: 15px;
            color: var(--text-main);
        }

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

        .brand-tags-container {
            margin-top: 50px;
            text-align: center;
        }

        .brand-tags-title {
            font-size: 1.2rem;
            font-weight: 600;
            color: var(--text-main);
            margin-bottom: 20px;
        }

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

        .tag-item {
            background: var(--bg-light);
            border: 1px solid var(--border-color);
            padding: 6px 14px;
            border-radius: 20px;
            font-size: 0.85rem;
            color: var(--text-muted);
            transition: all 0.3s;
        }

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

        /* 制作流程与标准化流程 */
        .process-steps {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 20px;
            position: relative;
        }

        .step-card {
            background: var(--white);
            border: 1px solid var(--border-color);
            border-radius: 12px;
            padding: 25px;
            text-align: center;
            position: relative;
        }

        .step-num {
            width: 40px;
            height: 40px;
            background: var(--primary-light);
            color: var(--primary);
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            font-weight: 700;
            margin: 0 auto 20px;
        }

        .step-card h3 {
            font-size: 1.15rem;
            margin-bottom: 10px;
        }

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

        /* 全行业解决方案 */
        .solution-section {
            background: var(--bg-light);
        }

        .solutions-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 30px;
        }

        .solution-item {
            background: var(--white);
            border-radius: 12px;
            padding: 30px;
            box-shadow: 0 4px 12px rgba(0, 0, 0, 0.02);
        }

        .solution-item h3 {
            font-size: 1.25rem;
            margin-bottom: 15px;
            display: flex;
            align-items: center;
            gap: 10px;
            color: var(--primary);
        }

        .solution-item ul {
            list-style: none;
            padding-left: 0;
        }

        .solution-item li {
            font-size: 0.95rem;
            color: var(--text-muted);
            margin-bottom: 10px;
            position: relative;
            padding-left: 15px;
        }

        .solution-item li::before {
            content: "•";
            color: var(--primary);
            position: absolute;
            left: 0;
        }

        /* 服务网络 */
        .network-grid {
            display: grid;
            grid-template-columns: 1fr 2fr;
            gap: 40px;
            align-items: center;
        }

        .network-text h3 {
            font-size: 1.8rem;
            margin-bottom: 20px;
        }

        .network-text p {
            color: var(--text-muted);
            margin-bottom: 20px;
        }

        .network-cities {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 15px;
        }

        .city-box {
            background: var(--bg-light);
            border: 1px solid var(--border-color);
            padding: 15px;
            border-radius: 8px;
            text-align: center;
            font-weight: 500;
        }

        /* 客户案例中心 & 软件介绍 */
        .case-gallery {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 30px;
            margin-bottom: 50px;
        }

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

        .case-img-container {
            position: relative;
            background: #eee;
            aspect-ratio: 16/10;
            overflow: hidden;
            display: flex;
            align-items: center;
            justify-content: center;
        }

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

        .case-info {
            padding: 20px;
        }

        .case-info h4 {
            font-size: 1.1rem;
            margin-bottom: 8px;
        }

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

        /* 对比评测 */
        .comparison-table-wrapper {
            overflow-x: auto;
            border: 1px solid var(--border-color);
            border-radius: 12px;
            background: var(--white);
        }

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

        .comparison-table th, .comparison-table td {
            padding: 16px 20px;
            border-bottom: 1px solid var(--border-color);
        }

        .comparison-table th {
            background: var(--bg-light);
            font-weight: 600;
        }

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

        .comparison-table td.highlight {
            background: var(--primary-light);
            font-weight: 600;
            color: var(--primary);
        }

        .rating-badge {
            display: inline-block;
            background: var(--accent);
            color: var(--white);
            padding: 5px 12px;
            border-radius: 20px;
            font-weight: bold;
            font-size: 0.9rem;
            margin-top: 15px;
        }

        /* Token 比价参考 */
        .token-pricing {
            background: var(--bg-light);
        }

        .pricing-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 30px;
        }

        .pricing-card {
            background: var(--white);
            border: 1px solid var(--border-color);
            border-radius: 12px;
            padding: 30px;
            text-align: center;
            position: relative;
        }

        .pricing-card.featured {
            border-color: var(--primary);
            box-shadow: 0 8px 24px rgba(0, 102, 255, 0.1);
        }

        .pricing-card.featured::before {
            content: "推荐";
            position: absolute;
            top: 10px;
            right: 10px;
            background: var(--primary);
            color: var(--white);
            font-size: 0.75rem;
            padding: 3px 8px;
            border-radius: 4px;
        }

        .pricing-card h3 {
            font-size: 1.4rem;
            margin-bottom: 15px;
        }

        .price-num {
            font-size: 2.2rem;
            font-weight: 700;
            color: var(--text-main);
            margin-bottom: 15px;
        }

        .price-num span {
            font-size: 0.9rem;
            color: var(--text-muted);
            font-weight: normal;
        }

        .pricing-card ul {
            list-style: none;
            padding: 0;
            margin-bottom: 25px;
            text-align: left;
        }

        .pricing-card li {
            font-size: 0.9rem;
            color: var(--text-muted);
            margin-bottom: 10px;
            display: flex;
            align-items: center;
            gap: 8px;
        }

        /* 职业技术培训 & 人工智能培训 */
        .training-grid {
            display: grid;
            grid-template-columns: repeat(5, 1fr);
            gap: 15px;
        }

        .training-card {
            background: var(--white);
            border: 1px solid var(--border-color);
            border-radius: 8px;
            padding: 20px 15px;
            text-align: center;
            transition: all 0.3s;
        }

        .training-card:hover {
            border-color: var(--primary);
            background: var(--primary-light);
            transform: translateY(-3px);
        }

        .training-card h4 {
            font-size: 1rem;
            color: var(--text-main);
            margin-bottom: 10px;
        }

        .training-card p {
            font-size: 0.8rem;
            color: var(--text-muted);
        }

        /* 常见用户问题 FAQ & 自助排查 */
        .faq-accordion {
            max-width: 800px;
            margin: 0 auto;
        }

        .faq-item {
            border: 1px solid var(--border-color);
            border-radius: 8px;
            margin-bottom: 15px;
            overflow: hidden;
        }

        .faq-header {
            background: var(--bg-light);
            padding: 18px 20px;
            display: flex;
            justify-content: space-between;
            align-items: center;
            cursor: pointer;
            font-weight: 600;
            user-select: none;
            transition: background 0.3s;
        }

        .faq-header:hover {
            background: var(--primary-light);
        }

        .faq-icon {
            font-size: 1.2rem;
            transition: transform 0.3s;
        }

        .faq-body {
            padding: 0 20px;
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.3s ease-out, padding 0.3s ease-out;
            background: var(--white);
        }

        .faq-item.active .faq-body {
            padding: 20px;
            max-height: 250px;
            border-top: 1px solid var(--border-color);
        }

        .faq-item.active .faq-icon {
            transform: rotate(45deg);
        }

        /* 网站术语百科 */
        .glossary-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 20px;
        }

        .glossary-card {
            background: var(--white);
            border: 1px solid var(--border-color);
            padding: 20px;
            border-radius: 8px;
        }

        .glossary-card dt {
            font-weight: 700;
            color: var(--primary);
            margin-bottom: 8px;
        }

        .glossary-card dd {
            font-size: 0.85rem;
            color: var(--text-muted);
            margin-left: 0;
        }

        /* 客户评论卡片 */
        .reviews-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 30px;
        }

        .review-card {
            background: var(--white);
            border: 1px solid var(--border-color);
            padding: 25px;
            border-radius: 12px;
            box-shadow: 0 4px 10px rgba(0, 0, 0, 0.02);
        }

        .review-rating {
            color: #fbbf24;
            margin-bottom: 12px;
        }

        .review-text {
            color: var(--text-muted);
            font-size: 0.95rem;
            margin-bottom: 20px;
            font-style: italic;
        }

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

        .review-author-info h5 {
            font-size: 0.95rem;
            margin-bottom: 2px;
        }

        .review-author-info p {
            font-size: 0.8rem;
            color: var(--text-muted);
        }

        /* 行业资讯 / 知识库 */
        .news-section {
            background: var(--bg-light);
        }

        .news-grid {
            display: grid;
            grid-template-columns: repeat(5, 1fr);
            gap: 20px;
        }

        .news-card {
            background: var(--white);
            border: 1px solid var(--border-color);
            border-radius: 8px;
            padding: 20px;
            display: flex;
            flex-direction: column;
            justify-content: space-between;
            transition: border-color 0.3s;
        }

        .news-card:hover {
            border-color: var(--primary);
        }

        .news-card h4 {
            font-size: 0.95rem;
            line-height: 1.4;
            margin-bottom: 15px;
        }

        .news-link {
            text-decoration: none;
            color: var(--primary);
            font-size: 0.85rem;
            font-weight: 600;
            display: inline-flex;
            align-items: center;
            gap: 5px;
        }

        /* 智能需求匹配与联系我们 */
        .contact-layout {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 50px;
        }

        .form-wrapper {
            background: var(--white);
            border: 1px solid var(--border-color);
            padding: 30px;
            border-radius: 12px;
            box-shadow: 0 4px 15px rgba(0, 0, 0, 0.02);
        }

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

        .form-group label {
            display: block;
            margin-bottom: 8px;
            font-weight: 500;
            font-size: 0.9rem;
        }

        .form-control {
            width: 100%;
            padding: 10px 14px;
            border: 1px solid var(--border-color);
            border-radius: 6px;
            font-size: 0.95rem;
            transition: border-color 0.3s;
        }

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

        .form-row {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 15px;
        }

        .btn-submit {
            width: 100%;
            background: var(--primary);
            color: var(--white);
            border: none;
            padding: 12px;
            border-radius: 6px;
            font-size: 1rem;
            font-weight: 600;
            cursor: pointer;
            transition: background 0.3s;
        }

        .btn-submit:hover {
            background: #0052cc;
        }

        .contact-info-panel {
            display: flex;
            flex-direction: column;
            justify-content: space-between;
        }

        .contact-info-list {
            margin-bottom: 30px;
        }

        .contact-info-item {
            margin-bottom: 20px;
        }

        .contact-info-item strong {
            display: block;
            font-size: 0.9rem;
            color: var(--text-muted);
            margin-bottom: 5px;
        }

        .contact-info-item p {
            font-size: 1.1rem;
            font-weight: 600;
        }

        .qr-codes {
            display: flex;
            gap: 30px;
            align-items: center;
        }

        .qr-item {
            text-align: center;
            max-width: 120px;
        }

        .qr-item img {
            width: 100%;
            border-radius: 8px;
            border: 1px solid var(--border-color);
            padding: 5px;
            background: var(--white);
            margin-bottom: 8px;
        }

        .qr-item p {
            font-size: 0.8rem;
            color: var(--text-muted);
        }

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

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

        .footer-brand img {
            height: 35px;
            margin-bottom: 15px;
            filter: brightness(0) invert(1);
        }

        .footer-title {
            color: var(--white);
            font-weight: 600;
            margin-bottom: 20px;
            font-size: 1rem;
        }

        .footer-links {
            list-style: none;
            padding: 0;
        }

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

        .footer-links a {
            color: #94a3b8;
            text-decoration: none;
            transition: color 0.3s;
        }

        .footer-links a:hover {
            color: var(--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-bottom-links {
            display: flex;
            gap: 20px;
        }

        .footer-bottom-links a {
            color: #64748b;
            text-decoration: none;
            transition: color 0.3s;
        }

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

        /* 浮动侧边栏与微件 */
        .float-widget {
            position: fixed;
            right: 20px;
            bottom: 35px;
            z-index: 999;
            display: flex;
            flex-direction: column;
            gap: 10px;
        }

        .widget-btn {
            width: 50px;
            height: 50px;
            background: var(--white);
            border: 1px solid var(--border-color);
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            box-shadow: 0 4px 12px rgba(0,0,0,0.1);
            cursor: pointer;
            transition: all 0.3s;
            position: relative;
        }

        .widget-btn:hover {
            background: var(--primary);
            border-color: var(--primary);
        }

        .widget-btn:hover svg {
            fill: var(--white);
        }

        .widget-btn svg {
            width: 22px;
            height: 22px;
            fill: var(--text-main);
            transition: fill 0.3s;
        }

        .widget-qr-popover {
            position: absolute;
            right: 60px;
            bottom: 0;
            background: var(--white);
            border: 1px solid var(--border-color);
            padding: 15px;
            border-radius: 8px;
            box-shadow: 0 4px 15px rgba(0,0,0,0.15);
            display: none;
            text-align: center;
            width: 140px;
        }

        .widget-qr-popover img {
            width: 110px;
            height: 110px;
            margin-bottom: 5px;
        }

        .widget-qr-popover p {
            font-size: 0.75rem;
            color: var(--text-main);
            margin: 0;
        }

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

        /* 响应式调整 */
        @media (max-width: 1024px) {
            .metrics-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .services-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .process-steps {
                grid-template-columns: repeat(2, 1fr);
            }
            .solutions-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .reviews-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .news-grid {
                grid-template-columns: repeat(3, 1fr);
            }
            .glossary-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .training-grid {
                grid-template-columns: repeat(3, 1fr);
            }
            .footer-grid {
                grid-template-columns: 1fr 1fr;
            }
        }

        @media (max-width: 768px) {
            .menu-toggle {
                display: flex;
            }
            nav {
                display: none;
                position: absolute;
                top: 70px;
                left: 0;
                right: 0;
                background: var(--white);
                border-bottom: 1px solid var(--border-color);
                padding: 20px;
                box-shadow: 0 4px 10px rgba(0,0,0,0.05);
            }
            nav.active {
                display: block;
            }
            nav ul {
                flex-direction: column;
                gap: 15px;
            }
            .nav-btn {
                display: inline-block;
                margin-top: 10px;
                text-align: center;
            }
            .hero h1 {
                font-size: 2rem;
            }
            .about-grid, .network-grid, .contact-layout {
                grid-template-columns: 1fr;
            }
            .metrics-grid, .services-grid, .process-steps, .solutions-grid, .reviews-grid, .news-grid, .glossary-grid, .training-grid, .case-gallery, .pricing-grid {
                grid-template-columns: 1fr;
            }
            .footer-grid {
                grid-template-columns: 1fr;
            }
        }