:root {
            --bg-primary: #f8fafc;
            --bg-secondary: #ffffff;
            --text-primary: #0f172a;
            --text-secondary: #475569;
            --color-primary: #0052ff; /* 撞色电光蓝 */
            --color-accent: #ff5a00; /* 撞色活力橙 */
            --border-color: #e2e8f0;
            --card-shadow: 0 10px 30px rgba(0, 82, 255, 0.05);
            --transition-speed: 0.3s;
        }

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

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

        .container {
            width: 100%;
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 20px;
        }

        /* 顶部导航 */
        header {
            position: sticky;
            top: 0;
            z-index: 100;
            background-color: rgba(255, 255, 255, 0.95);
            backdrop-filter: blur(8px);
            border-bottom: 1px solid var(--border-color);
            box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.05);
        }

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

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

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

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

        .nav-link {
            text-decoration: none;
            color: var(--text-secondary);
            font-size: 14px;
            font-weight: 500;
            transition: color var(--transition-speed);
        }

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

        .btn-nav-action {
            background-color: var(--color-primary);
            color: #fff;
            padding: 8px 16px;
            border-radius: 6px;
            font-size: 14px;
            font-weight: 600;
            text-decoration: none;
            transition: background var(--transition-speed);
        }

        .btn-nav-action:hover {
            background-color: #0042cc;
        }

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

        .menu-toggle span {
            width: 25px;
            height: 3px;
            background-color: var(--text-primary);
            border-radius: 2px;
        }

        /* Hero首屏 - 严禁图片，纯撞色与几何感 */
        .hero {
            background: linear-gradient(135deg, #e0f2fe 0%, #ede9fe 100%);
            padding: 100px 0 80px;
            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(0,82,255,0.15) 0%, transparent 70%);
            z-index: 1;
        }

        .hero-content {
            position: relative;
            z-index: 2;
            max-width: 800px;
            margin: 0 auto;
        }

        .badge-hero {
            display: inline-block;
            background-color: var(--color-accent);
            color: #fff;
            font-size: 12px;
            font-weight: 700;
            padding: 6px 12px;
            border-radius: 20px;
            margin-bottom: 20px;
            text-transform: uppercase;
            letter-spacing: 1px;
        }

        .hero h1 {
            font-size: 40px;
            line-height: 1.25;
            color: var(--text-primary);
            font-weight: 800;
            margin-bottom: 24px;
        }

        .hero h1 span {
            color: var(--color-primary);
        }

        .hero-desc {
            font-size: 18px;
            color: var(--text-secondary);
            margin-bottom: 35px;
        }

        .hero-btns {
            display: flex;
            justify-content: center;
            gap: 15px;
            flex-wrap: wrap;
        }

        .btn-primary {
            background-color: var(--color-primary);
            color: #fff;
            padding: 14px 28px;
            border-radius: 8px;
            font-weight: 700;
            text-decoration: none;
            transition: transform 0.2s, box-shadow 0.2s;
            box-shadow: 0 4px 14px rgba(0, 82, 255, 0.4);
        }

        .btn-primary:hover {
            transform: translateY(-2px);
            box-shadow: 0 6px 20px rgba(0, 82, 255, 0.6);
        }

        .btn-secondary {
            background-color: #fff;
            color: var(--text-primary);
            border: 2px solid var(--text-primary);
            padding: 12px 26px;
            border-radius: 8px;
            font-weight: 700;
            text-decoration: none;
            transition: background 0.2s, color 0.2s;
        }

        .btn-secondary:hover {
            background-color: var(--text-primary);
            color: #fff;
        }

        /* 核心板块公共标题 */
        section {
            padding: 80px 0;
            border-bottom: 1px solid var(--border-color);
        }

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

        .section-header h2 {
            font-size: 32px;
            font-weight: 700;
            color: var(--text-primary);
            margin-bottom: 15px;
        }

        .section-header p {
            color: var(--text-secondary);
            font-size: 16px;
        }

        /* 数据指标 */
        .stats-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 20px;
            margin-top: -40px;
            position: relative;
            z-index: 10;
        }

        .stat-card {
            background: #fff;
            padding: 24px;
            border-radius: 12px;
            border: 2px solid var(--text-primary);
            box-shadow: 4px 4px 0 var(--text-primary);
            text-align: center;
        }

        .stat-number {
            font-size: 32px;
            font-weight: 800;
            color: var(--color-primary);
            margin-bottom: 8px;
        }

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

        /* 平台介绍 & 关于我们 */
        .grid-half {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 40px;
            align-items: center;
        }

        .intro-text p {
            margin-bottom: 20px;
            color: var(--text-secondary);
            font-size: 16px;
        }

        .intro-features {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 15px;
        }

        .intro-feat-item {
            background-color: #fff;
            padding: 15px;
            border-left: 4px solid var(--color-accent);
            border-radius: 0 8px 8px 0;
            box-shadow: var(--card-shadow);
        }

        .intro-feat-item h4 {
            font-size: 16px;
            color: var(--text-primary);
            margin-bottom: 5px;
        }

        .intro-feat-item p {
            font-size: 12px;
            color: var(--text-secondary);
            margin: 0;
        }

        /* 标签云支持平台 */
        .platforms-cloud {
            display: flex;
            flex-wrap: wrap;
            gap: 10px;
            margin-top: 20px;
        }

        .platform-tag {
            background-color: #f1f5f9;
            color: var(--text-primary);
            padding: 6px 12px;
            border-radius: 20px;
            font-size: 13px;
            font-weight: 500;
            border: 1px solid var(--border-color);
        }

        .platform-tag.highlight {
            background-color: var(--color-primary);
            color: #fff;
            border-color: var(--color-primary);
        }

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

        .service-card {
            background-color: #fff;
            padding: 30px;
            border-radius: 12px;
            border: 1px solid var(--border-color);
            transition: all var(--transition-speed);
            position: relative;
        }

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

        .service-icon {
            width: 50px;
            height: 50px;
            background-color: rgba(0, 82, 255, 0.1);
            color: var(--color-primary);
            display: flex;
            align-items: center;
            justify-content: center;
            border-radius: 8px;
            font-size: 24px;
            font-weight: 700;
            margin-bottom: 20px;
        }

        .service-card h3 {
            font-size: 20px;
            margin-bottom: 12px;
        }

        .service-card p {
            color: var(--text-secondary);
            font-size: 14px;
        }

        /* 案例展示 - 方版素材图 */
        .case-showcase {
            background-color: #fff;
            padding: 40px;
            border-radius: 16px;
            border: 2px solid var(--text-primary);
            box-shadow: 6px 6px 0 var(--text-primary);
        }

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

        .case-media {
            border-radius: 8px;
            overflow: hidden;
            border: 1px solid var(--border-color);
        }

        .case-media img {
            width: 100%;
            display: block;
            object-fit: cover;
            aspect-ratio: 1;
        }

        .case-info h3 {
            font-size: 24px;
            margin-bottom: 15px;
        }

        .case-info ul {
            list-style: none;
            margin-bottom: 20px;
        }

        .case-info ul li {
            position: relative;
            padding-left: 20px;
            margin-bottom: 8px;
            color: var(--text-secondary);
            font-size: 14px;
        }

        .case-info ul li::before {
            content: "✓";
            position: absolute;
            left: 0;
            color: var(--color-accent);
            font-weight: bold;
        }

        /* 标准化流程 / 时间线 */
        .timeline {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 20px;
            position: relative;
        }

        .timeline-step {
            background: #fff;
            padding: 24px;
            border-radius: 8px;
            border-top: 4px solid var(--color-primary);
            box-shadow: var(--card-shadow);
        }

        .step-num {
            font-size: 12px;
            color: var(--color-accent);
            font-weight: 700;
            text-transform: uppercase;
            margin-bottom: 10px;
        }

        .timeline-step h4 {
            font-size: 18px;
            margin-bottom: 10px;
        }

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

        /* 对比评测 */
        .rating-box {
            text-align: center;
            background-color: #fff;
            padding: 30px;
            border-radius: 12px;
            margin-bottom: 40px;
            border: 1px solid var(--border-color);
        }

        .rating-stars {
            font-size: 32px;
            color: #f59e0b;
            margin-bottom: 10px;
        }

        .rating-score {
            font-size: 48px;
            font-weight: 900;
            color: var(--text-primary);
        }

        .rating-score span {
            font-size: 20px;
            color: var(--text-secondary);
        }

        .rating-label {
            font-size: 16px;
            color: var(--text-secondary);
            font-weight: bold;
        }

        .compare-table-wrapper {
            overflow-x: auto;
        }

        .compare-table {
            width: 100%;
            border-collapse: collapse;
            background-color: #fff;
            min-width: 600px;
        }

        .compare-table th, .compare-table td {
            padding: 16px;
            border: 1px solid var(--border-color);
            text-align: left;
            font-size: 14px;
        }

        .compare-table th {
            background-color: var(--text-primary);
            color: #fff;
        }

        .compare-table tr:nth-child(even) {
            background-color: #f8fafc;
        }

        .compare-table td.highlight {
            font-weight: bold;
            color: var(--color-primary);
            background-color: rgba(0, 82, 255, 0.02);
        }

        /* 培训模块 */
        .training-grid {
            display: grid;
            grid-template-columns: repeat(5, 1fr);
            gap: 15px;
        }

        .training-card {
            background-color: #fff;
            padding: 20px;
            border-radius: 8px;
            border: 1px solid var(--border-color);
            text-align: center;
            transition: all var(--transition-speed);
        }

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

        .training-card h4 {
            font-size: 15px;
            color: var(--text-primary);
            margin-bottom: 8px;
        }

        .training-card p {
            font-size: 12px;
            color: var(--text-secondary);
        }

        /* 客户案例图展示（banner/33.jpg & banner/12.jpg） */
        .banner-media-box {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 20px;
            margin-top: 40px;
        }

        .banner-media-box img {
            width: 100%;
            height: auto;
            border-radius: 12px;
            box-shadow: var(--card-shadow);
        }

        /* Token比价 */
        .pricing-list {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 20px;
        }

        .pricing-card {
            background-color: #fff;
            padding: 24px;
            border-radius: 8px;
            border: 2px solid var(--border-color);
            position: relative;
        }

        .pricing-card.hot {
            border-color: var(--color-accent);
        }

        .pricing-card.hot::after {
            content: "🔥 热门";
            position: absolute;
            top: -12px;
            right: 20px;
            background-color: var(--color-accent);
            color: #fff;
            padding: 2px 10px;
            font-size: 12px;
            border-radius: 10px;
            font-weight: bold;
        }

        .pricing-card h4 {
            font-size: 18px;
            margin-bottom: 15px;
        }

        .price-val {
            font-size: 28px;
            font-weight: 800;
            color: var(--color-primary);
            margin-bottom: 10px;
        }

        .price-val span {
            font-size: 14px;
            color: var(--text-secondary);
            font-weight: normal;
        }

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

        .review-card {
            background-color: #fff;
            padding: 24px;
            border-radius: 12px;
            box-shadow: var(--card-shadow);
            border: 1px solid var(--border-color);
        }

        .review-text {
            font-size: 14px;
            color: var(--text-secondary);
            margin-bottom: 15px;
            position: relative;
        }

        .review-text::before {
            content: "“";
            font-size: 40px;
            color: rgba(0, 82, 255, 0.1);
            position: absolute;
            top: -20px;
            left: -10px;
        }

        .review-user {
            display: flex;
            align-items: center;
            gap: 10px;
        }

        .review-user-info h5 {
            font-size: 14px;
            color: var(--text-primary);
        }

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

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

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

        .faq-question {
            width: 100%;
            background: none;
            border: none;
            padding: 18px 24px;
            text-align: left;
            font-size: 16px;
            font-weight: 600;
            color: var(--text-primary);
            cursor: pointer;
            display: flex;
            justify-content: space-between;
            align-items: center;
        }

        .faq-question::after {
            content: "+";
            font-size: 20px;
            color: var(--color-primary);
            transition: transform var(--transition-speed);
        }

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

        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height var(--transition-speed) ease-out;
            background-color: #fafbfc;
        }

        .faq-answer p {
            padding: 18px 24px;
            font-size: 14px;
            color: var(--text-secondary);
            margin: 0;
        }

        /* 百科 / 知识库 / 文章 */
        .wiki-grid {
            display: grid;
            grid-template-columns: 2fr 1fr;
            gap: 40px;
        }

        .article-list {
            display: flex;
            flex-direction: column;
            gap: 15px;
        }

        .article-card {
            background: #fff;
            padding: 15px;
            border-radius: 8px;
            border: 1px solid var(--border-color);
            display: flex;
            justify-content: space-between;
            align-items: center;
        }

        .article-card a {
            text-decoration: none;
            color: var(--text-primary);
            font-weight: 600;
            font-size: 15px;
        }

        .article-card a:hover {
            color: var(--color-primary);
        }

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

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

        .term-card {
            background-color: #fff;
            padding: 15px;
            border-radius: 8px;
            border-left: 4px solid var(--color-primary);
        }

        .term-card h5 {
            font-size: 14px;
            margin-bottom: 5px;
        }

        .term-card p {
            font-size: 12px;
            color: var(--text-secondary);
            margin: 0;
        }

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

        .form-card {
            background-color: #fff;
            padding: 30px;
            border-radius: 12px;
            border: 2px solid var(--text-primary);
            box-shadow: 6px 6px 0 var(--text-primary);
        }

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

        .form-group label {
            display: block;
            font-size: 14px;
            font-weight: 600;
            margin-bottom: 6px;
        }

        .form-group input, .form-group select, .form-group textarea {
            width: 100%;
            padding: 10px 14px;
            border: 1px solid var(--border-color);
            border-radius: 6px;
            font-size: 14px;
            background-color: #f8fafc;
        }

        .form-group input:focus, .form-group select:focus, .form-group textarea:focus {
            outline: none;
            border-color: var(--color-primary);
            background-color: #fff;
        }

        .btn-submit {
            width: 100%;
            background-color: var(--color-primary);
            color: #fff;
            border: none;
            padding: 12px;
            border-radius: 6px;
            font-size: 16px;
            font-weight: 700;
            cursor: pointer;
            transition: background var(--transition-speed);
        }

        .btn-submit:hover {
            background-color: #0042cc;
        }

        .contact-info {
            background-color: #fff;
            padding: 30px;
            border-radius: 12px;
            border: 1px solid var(--border-color);
        }

        .contact-info h3 {
            font-size: 22px;
            margin-bottom: 20px;
        }

        .contact-info p {
            margin-bottom: 15px;
            font-size: 14px;
            color: var(--text-secondary);
        }

        .qr-code {
            width: 120px;
            height: 120px;
            margin-top: 15px;
            border: 1px solid var(--border-color);
            padding: 5px;
            border-radius: 6px;
        }

        .qr-code img {
            width: 100%;
            height: auto;
        }

        /* 浮动客服 */
        .floating-service {
            position: fixed;
            bottom: 30px;
            right: 30px;
            z-index: 99;
            background-color: var(--color-accent);
            color: #fff;
            width: 50px;
            height: 50px;
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            font-weight: bold;
            box-shadow: 0 4px 10px rgba(0,0,0,0.2);
            cursor: pointer;
            transition: transform 0.2s;
        }

        .floating-service:hover {
            transform: scale(1.1);
        }

        .floating-service-panel {
            position: fixed;
            bottom: 90px;
            right: 30px;
            width: 260px;
            background: #fff;
            border: 2px solid var(--text-primary);
            border-radius: 12px;
            box-shadow: 0 10px 25px rgba(0,0,0,0.15);
            padding: 20px;
            display: none;
            z-index: 100;
        }

        .floating-service-panel.active {
            display: block;
        }

        .floating-service-panel h4 {
            font-size: 16px;
            margin-bottom: 10px;
        }

        .floating-service-panel p {
            font-size: 13px;
            color: var(--text-secondary);
            margin-bottom: 10px;
        }

        /* 页脚 */
        footer {
            background-color: var(--text-primary);
            color: #94a3b8;
            padding: 50px 0 30px;
            font-size: 13px;
            border-top: 4px solid var(--color-primary);
        }

        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr;
            gap: 40px;
            margin-bottom: 30px;
        }

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

        .footer-logo img {
            max-height: 40px;
            
        }

        .footer-links h4 {
            color: #fff;
            font-size: 15px;
            margin-bottom: 15px;
        }

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

        .footer-links ul li {
            margin-bottom: 8px;
        }

        .footer-links ul li a {
            color: #94a3b8;
            text-decoration: none;
            transition: color var(--transition-speed);
        }

        .footer-links ul li a:hover {
            color: #fff;
        }

        .footer-bottom {
            border-top: 1px solid #334155;
            padding-top: 20px;
            display: flex;
            justify-content: space-between;
            align-items: center;
            flex-wrap: wrap;
            gap: 15px;
        }

        .footer-bottom p {
            margin: 0;
        }

        .friend-links {
            display: flex;
            flex-wrap: wrap;
            gap: 15px;
        }

        .friend-links a {
            color: #94a3b8;
            text-decoration: none;
        }

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

        .ai-page-home-link {
            color: var(--color-accent);
            text-decoration: none;
            font-weight: bold;
        }

        /* 响应式媒体查询 */
        @media (max-width: 1024px) {
            .services-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .training-grid {
                grid-template-columns: repeat(3, 1fr);
            }
        }

        @media (max-width: 768px) {
            .menu-toggle {
                display: flex;
            }

            nav {
                display: none;
                flex-direction: column;
                position: absolute;
                top: 70px;
                left: 0;
                width: 100%;
                background-color: #fff;
                border-bottom: 1px solid var(--border-color);
                padding: 20px;
                box-shadow: 0 4px 6px rgba(0,0,0,0.05);
            }

            nav.active {
                display: flex;
            }

            .stats-grid {
                grid-template-columns: repeat(2, 1fr);
            }

            .grid-half {
                grid-template-columns: 1fr;
            }

            .services-grid {
                grid-template-columns: 1fr;
            }

            .case-wrapper {
                grid-template-columns: 1fr;
            }

            .timeline {
                grid-template-columns: repeat(2, 1fr);
            }

            .pricing-list {
                grid-template-columns: 1fr;
            }

            .reviews-grid {
                grid-template-columns: 1fr;
            }

            .training-grid {
                grid-template-columns: repeat(2, 1fr);
            }

            .wiki-grid {
                grid-template-columns: 1fr;
            }

            .contact-box {
                grid-template-columns: 1fr;
            }

            .footer-grid {
                grid-template-columns: 1fr;
            }

            .banner-media-box {
                grid-template-columns: 1fr;
            }
        }