:root {
            --primary: #2563eb;     /* 电光蓝 */
            --secondary: #facc15;   /* 柠檬黄 */
            --accent: #f97316;      /* 活力橙 */
            --dark: #0f172a;        /* 极客黛 */
            --light: #f8fafc;       /* 浅底色 */
            --border: #0f172a;      /* 粗边框色 */
            --bg-white: #ffffff;
            --shadow: 4px 4px 0px #0f172a;
            --shadow-hover: 8px 8px 0px #0f172a;
        }

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

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

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

        /* 统一粗野主义撞色卡片设计 */
        .brutal-card {
            background: var(--bg-white);
            border: 3px solid var(--border);
            box-shadow: var(--shadow);
            padding: 30px;
            border-radius: 4px;
            transition: all 0.2s ease-in-out;
            position: relative;
        }
        .brutal-card:hover {
            transform: translate(-4px, -4px);
            box-shadow: var(--shadow-hover);
        }

        .brutal-btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            background: var(--secondary);
            color: var(--dark);
            font-weight: 700;
            padding: 12px 28px;
            border: 3px solid var(--border);
            box-shadow: var(--shadow);
            border-radius: 4px;
            text-decoration: none;
            cursor: pointer;
            transition: all 0.1s ease-in-out;
            font-size: 1rem;
        }
        .brutal-btn:hover {
            transform: translate(-2px, -2px);
            box-shadow: var(--shadow-hover);
        }
        .brutal-btn:active {
            transform: translate(2px, 2px);
            box-shadow: 2px 2px 0px var(--border);
        }
        .brutal-btn.primary {
            background: var(--primary);
            color: white;
        }
        .brutal-btn.accent {
            background: var(--accent);
            color: white;
        }

        /* 顶部导航 */
        header {
            background: var(--bg-white);
            border-bottom: 3px solid var(--border);
            position: sticky;
            top: 0;
            z-index: 1000;
            padding: 15px 0;
        }
        .nav-wrapper {
            display: flex;
            justify-content: space-between;
            align-items: center;
        }
        .logo-area {
            display: flex;
            align-items: center;
            gap: 10px;
        }
        .ai-page-logo {
            height: 40px;
            width: auto;
        }
        .nav-menu {
            display: flex;
            gap: 20px;
            align-items: center;
        }
        .nav-menu a {
            color: var(--dark);
            text-decoration: none;
            font-weight: 700;
            font-size: 0.95rem;
            transition: color 0.2s;
        }
        .nav-menu a:hover {
            color: var(--primary);
        }
        .menu-toggle {
            display: none;
            flex-direction: column;
            gap: 5px;
            background: none;
            border: none;
            cursor: pointer;
        }
        .menu-toggle span {
            display: block;
            width: 25px;
            height: 3px;
            background: var(--dark);
        }

        /* Hero首屏 - 严禁出现图片 */
        .hero {
            background: linear-gradient(135deg, #eff6ff 0%, #fef08a 100%);
            border-bottom: 3px solid var(--border);
            padding: 80px 0 100px;
            text-align: center;
            position: relative;
        }
        .hero-badge {
            background: var(--primary);
            color: white;
            padding: 8px 16px;
            font-weight: 700;
            border: 2px solid var(--border);
            box-shadow: 2px 2px 0px var(--border);
            display: inline-block;
            margin-bottom: 25px;
            transform: rotate(-1.5deg);
        }
        .hero h1 {
            font-size: clamp(2rem, 5vw, 3.5rem);
            line-height: 1.2;
            color: var(--dark);
            margin-bottom: 25px;
            font-weight: 900;
        }
        .hero-desc {
            font-size: 1.25rem;
            max-width: 800px;
            margin: 0 auto 35px;
            color: #334155;
            font-weight: 500;
        }
        .hero-actions {
            display: flex;
            justify-content: center;
            gap: 15px;
            flex-wrap: wrap;
        }

        /* Section 通用标题 */
        section {
            padding: 80px 0;
            border-bottom: 3px solid var(--border);
        }
        section:nth-child(even) {
            background: #fff;
        }
        .section-header {
            text-align: center;
            margin-bottom: 50px;
        }
        .section-header h2 {
            font-size: 2.25rem;
            font-weight: 900;
            display: inline-block;
            position: relative;
            z-index: 1;
            padding: 0 10px;
        }
        .section-header h2::after {
            content: "";
            position: absolute;
            bottom: 4px;
            left: 0;
            right: 0;
            height: 12px;
            background: var(--secondary);
            z-index: -1;
            transform: rotate(-1deg);
        }
        .section-header p {
            color: #64748b;
            font-weight: 500;
            margin-top: 10px;
        }

        /* 核心卖点 & 数据指标 */
        .metrics-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
            gap: 25px;
        }
        .metric-card {
            text-align: center;
            background: #fef08a;
        }
        .metric-num {
            font-size: 3rem;
            font-weight: 900;
            color: var(--primary);
            line-height: 1;
            margin-bottom: 10px;
        }
        .metric-label {
            font-weight: 700;
            font-size: 1.1rem;
        }

        /* 关于我们 */
        .about-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 40px;
            align-items: center;
        }
        .about-text h3 {
            font-size: 1.75rem;
            margin-bottom: 20px;
            font-weight: 800;
        }
        .about-p {
            margin-bottom: 20px;
            font-size: 1.05rem;
            color: #475569;
        }
        .model-tags {
            display: flex;
            flex-wrap: wrap;
            gap: 8px;
            margin-top: 25px;
        }
        .model-tag {
            background: #f1f5f9;
            border: 2px solid var(--border);
            padding: 4px 10px;
            font-size: 0.85rem;
            font-weight: 600;
            border-radius: 4px;
        }

        /* 服务与解决方案 Grid */
        .services-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
            gap: 30px;
        }
        .service-card h3 {
            margin: 15px 0 10px;
            font-weight: 800;
            font-size: 1.35rem;
        }
        .service-icon {
            font-size: 2.5rem;
            background: var(--secondary);
            width: 60px;
            height: 60px;
            display: flex;
            align-items: center;
            justify-content: center;
            border: 3px solid var(--border);
            box-shadow: 2px 2px 0px var(--border);
            border-radius: 4px;
        }

        /* 流程步骤 */
        .flow-steps {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
            gap: 25px;
            position: relative;
        }
        .flow-step {
            position: relative;
        }
        .step-num {
            font-size: 3rem;
            font-weight: 900;
            color: rgba(37, 99, 235, 0.15);
            position: absolute;
            top: 10px;
            right: 15px;
            line-height: 1;
        }

        /* 案例中心 */
        .case-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
            gap: 30px;
        }
        .case-card {
            overflow: hidden;
            padding: 0;
        }
        .case-img-wrap {
            border-bottom: 3px solid var(--border);
            background: #e2e8f0;
            aspect-ratio: 16/9;
            overflow: hidden;
        }
        .case-img-wrap img {
            width: 100%;
            height: 100%;
            object-fit: cover;
        }
        .case-info {
            padding: 20px;
        }

        /* 对比评测表格 */
        .table-responsive {
            overflow-x: auto;
            border: 3px solid var(--border);
            box-shadow: var(--shadow);
            border-radius: 4px;
            background: white;
        }
        .comparison-table {
            width: 100%;
            border-collapse: collapse;
            text-align: left;
            min-width: 600px;
        }
        .comparison-table th, .comparison-table td {
            padding: 15px 20px;
            border: 1px solid #e2e8f0;
            font-weight: 700;
        }
        .comparison-table th {
            background: var(--dark);
            color: white;
            border-bottom: 3px solid var(--border);
        }
        .comparison-table tr:nth-child(even) td {
            background: #f8fafc;
        }
        .highlight-cell {
            background: #fef08a !important;
            color: var(--primary);
        }

        /* FAQ折叠面板 */
        .faq-list {
            max-width: 800px;
            margin: 0 auto;
            display: flex;
            flex-direction: column;
            gap: 15px;
        }
        .faq-item {
            border: 3px solid var(--border);
            background: var(--bg-white);
            box-shadow: 3px 3px 0 var(--border);
            border-radius: 4px;
        }
        .faq-q {
            padding: 20px;
            font-weight: 800;
            cursor: pointer;
            display: flex;
            justify-content: space-between;
            align-items: center;
            background: #f8fafc;
        }
        .faq-q::after {
            content: "+";
            font-size: 1.5rem;
            font-weight: 900;
            transition: transform 0.2s;
        }
        .faq-item.active .faq-q::after {
            transform: rotate(45deg);
        }
        .faq-a {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.2s ease-out;
            padding: 0 20px;
            font-weight: 500;
            color: #475569;
        }
        .faq-item.active .faq-a {
            max-height: 200px;
            padding: 20px;
            border-top: 2px solid var(--border);
        }

        /* 评论模块 */
        .comments-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
            gap: 25px;
        }
        .comment-user {
            display: flex;
            align-items: center;
            gap: 15px;
            margin-top: 20px;
            border-top: 1px solid #e2e8f0;
            padding-top: 15px;
        }
        .user-avatar {
            width: 45px;
            height: 45px;
            background: var(--primary);
            border: 2px solid var(--border);
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            color: white;
            font-weight: 900;
        }

        /* 表单模块 */
        .form-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 40px;
        }
        .contact-form {
            display: flex;
            flex-direction: column;
            gap: 15px;
        }
        .form-group {
            display: flex;
            flex-direction: column;
            gap: 5px;
        }
        .form-group label {
            font-weight: 800;
            font-size: 0.9rem;
        }
        .form-control {
            border: 3px solid var(--border);
            padding: 10px 15px;
            font-size: 1rem;
            font-weight: 600;
            border-radius: 4px;
            background: #fff;
        }
        .form-control:focus {
            outline: none;
            border-color: var(--primary);
            box-shadow: 2px 2px 0 var(--primary);
        }
        textarea.form-control {
            resize: vertical;
            min-height: 120px;
        }

        /* 资讯与百科 */
        .news-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
            gap: 30px;
        }

        /* 联络与加盟 */
        .agent-section {
            background: #eff6ff;
            text-align: center;
        }
        .contact-info-block {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
            gap: 20px;
            margin-top: 30px;
        }
        .qr-card {
            text-align: center;
            background: white;
            border: 3px solid var(--border);
            padding: 20px;
            box-shadow: var(--shadow);
        }
        .qr-card img {
            width: 150px;
            height: 150px;
            margin-bottom: 10px;
            border: 1px solid #e2e8f0;
        }

        /* 页脚 */
        footer {
            background: var(--dark);
            color: #94a3b8;
            padding: 60px 0 30px;
            border-top: 3px solid var(--border);
        }
        .footer-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
            gap: 40px;
            margin-bottom: 40px;
        }
        .footer-logo {
            
            max-width: 150px;
        }
        .footer-title {
            color: white;
            font-weight: 800;
            margin-bottom: 15px;
            font-size: 1.1rem;
        }
        .footer-links {
            list-style: none;
            display: flex;
            flex-direction: column;
            gap: 10px;
        }
        .footer-links a {
            color: #94a3b8;
            text-decoration: none;
            transition: color 0.2s;
        }
        .footer-links a:hover {
            color: var(--secondary);
        }
        .footer-bottom {
            border-top: 1px solid #334155;
            padding-top: 20px;
            display: flex;
            justify-content: space-between;
            flex-wrap: wrap;
            gap: 15px;
            font-size: 0.85rem;
        }
        .friend-links {
            display: flex;
            flex-wrap: wrap;
            gap: 10px;
            align-items: center;
        }
        .friend-links a {
            color: #cbd5e1;
            text-decoration: none;
            background: #334155;
            padding: 2px 8px;
            border-radius: 4px;
            font-size: 0.8rem;
        }
        .friend-links a:hover {
            background: var(--primary);
            color: white;
        }

        /* 浮动客服 */
        .float-service {
            position: fixed;
            bottom: 30px;
            right: 30px;
            z-index: 999;
            display: flex;
            flex-direction: column;
            gap: 10px;
        }
        .float-btn {
            width: 50px;
            height: 50px;
            border-radius: 50%;
            background: var(--secondary);
            border: 3px solid var(--border);
            box-shadow: 2px 2px 0 var(--border);
            display: flex;
            align-items: center;
            justify-content: center;
            cursor: pointer;
            font-weight: 900;
            text-decoration: none;
            color: var(--dark);
            position: relative;
        }
        .float-btn:hover {
            transform: scale(1.05);
        }
        .float-qr {
            position: absolute;
            bottom: 60px;
            right: 0;
            background: white;
            border: 3px solid var(--border);
            padding: 10px;
            display: none;
            box-shadow: var(--shadow);
            text-align: center;
        }
        .float-qr img {
            width: 120px;
            height: 120px;
        }
        .float-btn:hover .float-qr {
            display: block;
        }

        /* 响应式样式调整 */
        @media (max-width: 992px) {
            .about-grid, .form-grid {
                grid-template-columns: 1fr;
            }
            .menu-toggle {
                display: flex;
            }
            .nav-menu {
                display: none;
                position: absolute;
                top: 75px;
                left: 0;
                right: 0;
                background: white;
                border-bottom: 3px solid var(--border);
                flex-direction: column;
                padding: 20px;
                gap: 15px;
                box-shadow: var(--shadow);
            }
            .nav-menu.active {
                display: flex;
            }
        }