:root {
            --primary: #7000ff; /* 霓虹紫 */
            --accent-orange: #ff4500; /* 撞色橙 */
            --accent-cyan: #00f5ff; /* 极光青 */
            --bg-light: #f8fafc;
            --bg-card: #ffffff;
            --text-dark: #0f172a;
            --text-muted: #475569;
            --border-color: #e2e8f0;
            --border-bold: #0f172a;
        }

        * {
            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-light);
            color: var(--text-dark);
            line-height: 1.6;
            overflow-x: hidden;
        }

        /* 统一容器 */
        .container {
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 24px;
            width: 100%;
        }

        section {
            padding: 80px 0;
            border-bottom: 2px solid var(--border-bold);
        }

        h2 {
            font-size: 2.25rem;
            font-weight: 800;
            text-align: center;
            margin-bottom: 16px;
            text-transform: uppercase;
            letter-spacing: -0.05em;
        }

        .section-desc {
            text-align: center;
            color: var(--text-muted);
            max-width: 600px;
            margin: 0 auto 48px;
            font-size: 1.1rem;
        }

        /* 撞色艳色按钮 */
        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            padding: 12px 28px;
            font-weight: 700;
            text-decoration: none;
            border: 3px solid var(--border-bold);
            border-radius: 0;
            transition: all 0.2s ease;
            cursor: pointer;
            text-transform: uppercase;
        }

        .btn-primary {
            background-color: var(--accent-orange);
            color: #ffffff;
            box-shadow: 4px 4px 0px var(--border-bold);
        }

        .btn-primary:hover {
            transform: translate(-2px, -2px);
            box-shadow: 6px 6px 0px var(--border-bold);
        }

        .btn-secondary {
            background-color: var(--accent-cyan);
            color: var(--text-dark);
            box-shadow: 4px 4px 0px var(--border-bold);
        }

        .btn-secondary:hover {
            transform: translate(-2px, -2px);
            box-shadow: 6px 6px 0px var(--border-bold);
        }

        /* 导航栏 */
        header {
            background-color: #ffffff;
            border-bottom: 3px solid var(--border-bold);
            position: sticky;
            top: 0;
            z-index: 1000;
        }

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

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

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

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

        .nav-menu a {
            color: var(--text-dark);
            text-decoration: none;
            font-weight: 600;
            font-size: 0.95rem;
            transition: color 0.2s;
        }

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

        .nav-actions {
            display: flex;
            align-items: center;
            gap: 16px;
        }

        /* 手机端菜单按钮 */
        .menu-toggle {
            display: none;
            background: none;
            border: none;
            font-size: 1.5rem;
            cursor: pointer;
        }

        /* 首屏 Hero (无图，纯撞色与版式) */
        .hero {
            background: linear-gradient(135deg, #fef08a 0%, #fed7aa 100%);
            border-bottom: 4px solid var(--border-bold);
            padding: 100px 0;
            text-align: center;
        }

        .hero-tag {
            display: inline-block;
            background-color: var(--primary);
            color: #ffffff;
            padding: 6px 16px;
            font-weight: 700;
            margin-bottom: 24px;
            border: 2px solid var(--border-bold);
            transform: rotate(-1deg);
        }

        .hero h1 {
            font-size: 3.5rem;
            font-weight: 900;
            line-height: 1.1;
            margin-bottom: 24px;
            color: var(--text-dark);
        }

        .hero p {
            font-size: 1.25rem;
            color: var(--text-dark);
            max-width: 800px;
            margin: 0 auto 36px;
            font-weight: 500;
        }

        .hero-buttons {
            display: flex;
            justify-content: center;
            gap: 20px;
        }

        /* 数据指标卡片 */
        .stats-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 24px;
            margin-top: -40px;
            position: relative;
            z-index: 10;
        }

        .stat-card {
            background-color: var(--bg-card);
            border: 3px solid var(--border-bold);
            padding: 24px;
            text-align: center;
            box-shadow: 6px 6px 0px var(--border-bold);
        }

        .stat-card h3 {
            font-size: 2.5rem;
            font-weight: 800;
            color: var(--primary);
            margin-bottom: 8px;
        }

        .stat-card p {
            font-weight: 600;
            color: var(--text-dark);
        }

        /* 关于我们 */
        .about-wrap {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 48px;
            align-items: center;
        }

        .about-content h3 {
            font-size: 1.8rem;
            margin-bottom: 20px;
        }

        .about-content p {
            margin-bottom: 16px;
            color: var(--text-muted);
        }

        /* AIGC 服务体系 */
        .service-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 24px;
        }

        .service-card {
            background: #ffffff;
            border: 3px solid var(--border-bold);
            padding: 32px;
            box-shadow: 6px 6px 0px var(--border-bold);
            transition: transform 0.2s;
        }

        .service-card:hover {
            transform: translate(-4px, -4px);
            box-shadow: 10px 10px 0px var(--border-bold);
        }

        .service-card .icon {
            width: 48px;
            height: 48px;
            background-color: var(--accent-cyan);
            border: 2px solid var(--border-bold);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 24px;
            margin-bottom: 20px;
        }

        .service-card h3 {
            font-size: 1.4rem;
            margin-bottom: 12px;
        }

        /* 流程步骤 */
        .step-flow {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 24px;
            position: relative;
        }

        .step-item {
            background: #ffffff;
            border: 3px solid var(--border-bold);
            padding: 24px;
            position: relative;
        }

        .step-num {
            position: absolute;
            top: -20px;
            left: 20px;
            background: var(--accent-orange);
            color: #ffffff;
            font-weight: 800;
            padding: 4px 12px;
            border: 2px solid var(--border-bold);
        }

        /* 解决方案 */
        .solution-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 32px;
        }

        .solution-card {
            background-color: #ffffff;
            border: 3px solid var(--border-bold);
            padding: 32px;
            display: flex;
            flex-direction: column;
            justify-content: space-between;
        }

        .solution-tags {
            display: flex;
            flex-wrap: wrap;
            gap: 8px;
            margin-top: 16px;
        }

        .solution-tag {
            background: var(--bg-light);
            border: 1px solid var(--border-bold);
            padding: 4px 10px;
            font-size: 0.85rem;
            font-weight: 600;
        }

        /* 案例中心 */
        .case-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 24px;
        }

        .case-card {
            background: #ffffff;
            border: 3px solid var(--border-bold);
            overflow: hidden;
            display: flex;
            flex-direction: column;
        }

        .case-img-wrap {
            border-bottom: 3px solid var(--border-bold);
            background: #e2e8f0;
            aspect-ratio: 16/9;
            overflow: hidden;
        }

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

        .case-body {
            padding: 20px;
        }

        /* 评测与比价 */
        .comparison-table-wrap {
            overflow-x: auto;
            border: 3px solid var(--border-bold);
            background: #ffffff;
        }

        table {
            width: 100%;
            border-collapse: collapse;
            text-align: left;
        }

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

        th {
            background-color: var(--primary);
            color: #ffffff;
            font-weight: 800;
        }

        tr:nth-child(even) {
            background-color: var(--bg-light);
        }

        /* 评测得分卡 */
        .rating-box {
            background: var(--accent-cyan);
            border: 3px solid var(--border-bold);
            padding: 32px;
            margin-bottom: 40px;
            display: flex;
            align-items: center;
            justify-content: space-between;
        }

        .rating-num {
            font-size: 4rem;
            font-weight: 900;
            color: var(--text-dark);
            line-height: 1;
        }

        /* 培训 */
        .training-grid {
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: 32px;
        }

        .training-card {
            background: #ffffff;
            border: 3px solid var(--border-bold);
            padding: 32px;
            box-shadow: 6px 6px 0px var(--border-bold);
        }

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

        .comment-card {
            background: #ffffff;
            border: 3px solid var(--border-bold);
            padding: 24px;
            position: relative;
        }

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

        .comment-avatar {
            width: 48px;
            height: 48px;
            border-radius: 50%;
            background: var(--primary);
            color: #ffffff;
            display: flex;
            align-items: center;
            justify-content: center;
            font-weight: 700;
        }

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

        .faq-item {
            border: 3px solid var(--border-bold);
            background: #ffffff;
            margin-bottom: 16px;
        }

        .faq-quest {
            padding: 20px;
            font-weight: 700;
            cursor: pointer;
            display: flex;
            justify-content: space-between;
            align-items: center;
            user-select: none;
        }

        .faq-ans {
            padding: 0 20px;
            max-height: 0;
            overflow: hidden;
            transition: all 0.3s ease;
            color: var(--text-muted);
            border-top: 0 solid var(--border-bold);
        }

        .faq-item.active .faq-ans {
            padding: 20px;
            max-height: 500px;
            border-top: 2px solid var(--border-bold);
        }

        /* 术语与知识库 */
        .info-split {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 48px;
        }

        .article-list {
            display: flex;
            flex-direction: column;
            gap: 16px;
        }

        .article-link {
            display: block;
            background: #ffffff;
            border: 2px solid var(--border-bold);
            padding: 16px;
            text-decoration: none;
            color: var(--text-dark);
            font-weight: 700;
            transition: transform 0.2s;
        }

        .article-link:hover {
            transform: translateX(6px);
            background: var(--accent-cyan);
        }

        /* 需求匹配与表单 */
        .contact-section {
            background-color: #fef08a;
        }

        .form-wrap {
            background: #ffffff;
            border: 4px solid var(--border-bold);
            padding: 40px;
            box-shadow: 8px 8px 0px var(--border-bold);
            max-width: 800px;
            margin: 0 auto;
        }

        .form-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 20px;
            margin-bottom: 20px;
        }

        .form-group {
            display: flex;
            flex-direction: column;
        }

        .form-group-full {
            grid-column: span 2;
        }

        label {
            font-weight: 700;
            margin-bottom: 8px;
        }

        input, select, textarea {
            padding: 12px;
            border: 2px solid var(--border-bold);
            font-size: 1rem;
            outline: none;
        }

        input:focus, select:focus, textarea:focus {
            border-color: var(--primary);
        }

        .contact-info-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 32px;
            margin-top: 60px;
        }

        .qr-card {
            background: #ffffff;
            border: 3px solid var(--border-bold);
            padding: 24px;
            display: flex;
            align-items: center;
            gap: 20px;
        }

        .qr-card img {
            width: 120px;
            height: 120px;
            border: 2px solid var(--border-bold);
        }

        /* 浮动工具栏 */
        .float-toolbar {
            position: fixed;
            right: 24px;
            bottom: 24px;
            display: flex;
            flex-direction: column;
            gap: 12px;
            z-index: 999;
        }

        .float-btn {
            width: 50px;
            height: 50px;
            background: var(--accent-orange);
            border: 2px solid var(--border-bold);
            display: flex;
            align-items: center;
            justify-content: center;
            cursor: pointer;
            box-shadow: 3px 3px 0px var(--border-bold);
            position: relative;
        }

        .float-btn:hover {
            transform: translate(-2px, -2px);
            box-shadow: 5px 5px 0px var(--border-bold);
        }

        .float-btn .tooltip {
            position: absolute;
            right: 60px;
            background: #ffffff;
            border: 2px solid var(--border-bold);
            padding: 8px 12px;
            font-weight: 700;
            white-space: nowrap;
            display: none;
        }

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

        /* 底部 */
        footer {
            background-color: var(--text-dark);
            color: #ffffff;
            padding: 60px 0 30px;
            border-top: 4px solid var(--border-bold);
        }

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

        .footer-col h4 {
            font-size: 1.2rem;
            margin-bottom: 20px;
            color: var(--accent-cyan);
        }

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

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

        .footer-col ul li a {
            color: #cbd5e1;
            text-decoration: none;
            transition: color 0.2s;
        }

        .footer-col ul li a:hover {
            color: var(--accent-cyan);
        }

        .friendly-links {
            border-top: 1px solid #334155;
            padding-top: 20px;
            margin-top: 20px;
            font-size: 0.9rem;
        }

        .friendly-links a {
            color: #94a3b8;
            margin-right: 15px;
            text-decoration: none;
        }

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

        .copyright-bar {
            border-top: 1px solid #334155;
            padding-top: 20px;
            text-align: center;
            font-size: 0.85rem;
            color: #94a3b8;
        }

        /* 响应式媒体查询 */
        @media (max-width: 1024px) {
            .stats-grid, .service-grid, .step-flow, .case-grid, .comment-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .about-wrap, .solution-grid, .training-grid, .info-split, .contact-info-grid {
                grid-template-columns: 1fr;
            }
            .footer-grid {
                grid-template-columns: repeat(2, 1fr);
            }
        }

        @media (max-width: 768px) {
            .hero h1 {
                font-size: 2.2rem;
            }
            .stats-grid {
                grid-template-columns: 1fr;
                margin-top: 20px;
            }
            .service-grid, .step-flow, .case-grid, .comment-grid {
                grid-template-columns: 1fr;
            }
            .nav-menu {
                display: none;
                flex-direction: column;
                position: absolute;
                top: 70px;
                left: 0;
                width: 100%;
                background: #ffffff;
                border-bottom: 3px solid var(--border-bold);
                padding: 20px;
            }
            .nav-menu.active {
                display: flex;
            }
            .menu-toggle {
                display: block;
            }
            .form-grid {
                grid-template-columns: 1fr;
            }
            .form-group-full {
                grid-column: span 1;
            }
        }