:root {
            --primary: #00e5ff; /* 荧光青 */
            --secondary: #ff007f; /* 极光粉 */
            --dark: #0f172a; /* 深蓝黑 */
            --light: #f8fafc; /* 浅灰白 */
            --card-bg: #ffffff;
            --accent: #7c3aed; /* 炫目紫 */
            --text-main: #1e293b;
            --text-muted: #64748b;
        }

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

        html {
            scroll-behavior: smooth;
            font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
            color: var(--text-main);
            background-color: var(--light);
        }

        body {
            line-height: 1.6;
            overflow-x: hidden;
        }

        /* 统一容器 */
        .container {
            width: 100%;
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 20px;
        }

        /* 头部与导航 */
        header {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            background: rgba(255, 255, 255, 0.9);
            backdrop-filter: blur(10px);
            z-index: 1000;
            border-bottom: 3px solid var(--dark);
            box-shadow: 0 4px 0 rgba(15, 23, 42, 0.1);
        }

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

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

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

        .logo-text {
            font-size: 20px;
            font-weight: 900;
            color: var(--dark);
            text-transform: uppercase;
            letter-spacing: 1px;
        }

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

        .nav-menu a {
            text-decoration: none;
            color: var(--dark);
            font-weight: 700;
            font-size: 14px;
            transition: all 0.2s ease;
            padding: 5px 10px;
            border: 2px solid transparent;
        }

        .nav-menu a:hover {
            background-color: var(--primary);
            border: 2px solid var(--dark);
            box-shadow: 2px 2px 0 var(--dark);
            color: var(--dark);
        }

        .nav-btn {
            background: var(--secondary);
            color: #fff !important;
            border: 2px solid var(--dark) !important;
            box-shadow: 3px 3px 0 var(--dark);
            padding: 8px 16px !important;
            border-radius: 4px;
        }

        .nav-btn:hover {
            transform: translate(-2px, -2px);
            box-shadow: 5px 5px 0 var(--dark);
            background: var(--primary) !important;
            color: var(--dark) !important;
        }

        /* 移动端菜单按钮 */
        .menu-toggle {
            display: none;
            background: none;
            border: 2px solid var(--dark);
            font-size: 20px;
            cursor: pointer;
            padding: 5px 10px;
            font-weight: bold;
        }

        /* 首屏 Hero - 无图片，明艳撞色风 */
        .hero {
            padding: 160px 0 100px;
            background: linear-gradient(135deg, #fff 0%, #e0f2fe 50%, #fae8ff 100%);
            border-bottom: 4px solid var(--dark);
            position: relative;
            overflow: hidden;
        }

        .hero::before {
            content: '';
            position: absolute;
            width: 200px;
            height: 200px;
            background: var(--primary);
            border: 4px solid var(--dark);
            top: -50px;
            right: -50px;
            transform: rotate(45deg);
            z-index: 1;
        }

        .hero::after {
            content: '';
            position: absolute;
            width: 150px;
            height: 150px;
            background: var(--secondary);
            border: 4px solid var(--dark);
            bottom: -30px;
            left: -30px;
            transform: rotate(15deg);
            z-index: 1;
        }

        .hero-content {
            position: relative;
            z-index: 2;
            text-align: center;
            max-width: 900px;
            margin: 0 auto;
        }

        .hero-badge {
            display: inline-block;
            background: var(--primary);
            color: var(--dark);
            border: 2px solid var(--dark);
            padding: 6px 16px;
            font-weight: 800;
            font-size: 14px;
            text-transform: uppercase;
            box-shadow: 3px 3px 0 var(--dark);
            margin-bottom: 25px;
            transform: rotate(-1deg);
        }

        h1.hero-title {
            font-size: 42px;
            font-weight: 900;
            line-height: 1.2;
            color: var(--dark);
            margin-bottom: 25px;
        }

        .hero-desc {
            font-size: 18px;
            color: var(--text-muted);
            margin-bottom: 40px;
            font-weight: 500;
        }

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

        .btn-main {
            background: var(--primary);
            color: var(--dark);
            border: 3px solid var(--dark);
            padding: 16px 36px;
            font-size: 18px;
            font-weight: 900;
            text-decoration: none;
            box-shadow: 5px 5px 0 var(--dark);
            transition: all 0.15s ease-in-out;
            border-radius: 4px;
        }

        .btn-main:hover {
            transform: translate(-3px, -3px);
            box-shadow: 8px 8px 0 var(--dark);
            background: #00f0ff;
        }

        .btn-sub {
            background: #fff;
            color: var(--dark);
            border: 3px solid var(--dark);
            padding: 16px 36px;
            font-size: 18px;
            font-weight: 900;
            text-decoration: none;
            box-shadow: 5px 5px 0 var(--dark);
            transition: all 0.15s ease-in-out;
            border-radius: 4px;
        }

        .btn-sub:hover {
            transform: translate(-3px, -3px);
            box-shadow: 8px 8px 0 var(--dark);
            background: var(--secondary);
            color: #fff;
        }

        /* 核心特性数据卡片 */
        .features-summary {
            margin-top: -50px;
            position: relative;
            z-index: 10;
        }

        .feature-grid-3 {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
            gap: 20px;
        }

        .summary-card {
            background: #fff;
            border: 3px solid var(--dark);
            padding: 30px;
            box-shadow: 6px 6px 0 var(--dark);
            transition: transform 0.2s;
        }

        .summary-card:hover {
            transform: translateY(-5px);
        }

        .summary-card h3 {
            font-size: 22px;
            font-weight: 800;
            margin-bottom: 12px;
            color: var(--dark);
            display: flex;
            align-items: center;
            gap: 10px;
        }

        .summary-card h3::before {
            content: '●';
            color: var(--secondary);
        }

        /* 通用区块排版 */
        section {
            padding: 80px 0;
            border-bottom: 3px solid var(--dark);
        }

        .section-title {
            text-align: center;
            font-size: 32px;
            font-weight: 900;
            margin-bottom: 15px;
            color: var(--dark);
            position: relative;
        }

        .section-title span {
            background: var(--primary);
            padding: 2px 10px;
            border: 2px solid var(--dark);
            display: inline-block;
            transform: rotate(-1deg);
        }

        .section-subtitle {
            text-align: center;
            color: var(--text-muted);
            font-size: 16px;
            margin-bottom: 50px;
            max-width: 700px;
            margin-left: auto;
            margin-right: auto;
        }

        /* 卡片网格 */
        .card-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
            gap: 30px;
        }

        .info-card {
            background: #fff;
            border: 3px solid var(--dark);
            padding: 30px;
            box-shadow: 6px 6px 0 var(--dark);
            position: relative;
            overflow: hidden;
            transition: all 0.2s ease;
        }

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

        .info-card .tag {
            position: absolute;
            top: 10px;
            right: 10px;
            background: var(--accent);
            color: #fff;
            font-size: 12px;
            font-weight: 700;
            padding: 2px 8px;
            border: 1px solid var(--dark);
        }

        .info-card h4 {
            font-size: 20px;
            font-weight: 800;
            margin-bottom: 15px;
            color: var(--dark);
        }

        /* 全平台模型展示 */
        .model-cloud-box {
            background: #fff;
            border: 3px solid var(--dark);
            padding: 40px;
            box-shadow: 8px 8px 0 var(--dark);
        }

        .model-list-wrapper {
            display: flex;
            flex-wrap: wrap;
            gap: 12px;
            justify-content: center;
        }

        .model-tag {
            background: #f1f5f9;
            color: var(--dark);
            border: 2px solid var(--dark);
            padding: 8px 16px;
            font-weight: 700;
            font-size: 14px;
            border-radius: 4px;
            transition: all 0.15s;
        }

        .model-tag:hover {
            background: var(--secondary);
            color: #fff;
            transform: scale(1.05) rotate(1deg);
        }

        /* 对比评测表格 */
        .table-responsive {
            width: 100%;
            overflow-x: auto;
            border: 3px solid var(--dark);
            box-shadow: 8px 8px 0 var(--dark);
            margin-bottom: 30px;
            background: #fff;
        }

        table {
            width: 100%;
            border-collapse: collapse;
            text-align: left;
            min-width: 600px;
        }

        th, td {
            padding: 15px 20px;
            border: 2px solid var(--dark);
            font-weight: 700;
        }

        th {
            background: var(--dark);
            color: #fff;
        }

        tr:nth-child(even) {
            background: #f8fafc;
        }

        .highlight-col {
            background: rgba(0, 229, 255, 0.1);
        }

        /* 评测分数卡片 */
        .rating-box {
            display: flex;
            align-items: center;
            justify-content: space-around;
            background: var(--accent);
            color: #fff;
            border: 3px solid var(--dark);
            padding: 30px;
            box-shadow: 8px 8px 0 var(--dark);
            margin-bottom: 40px;
            flex-wrap: wrap;
            gap: 20px;
        }

        .rating-score {
            font-size: 60px;
            font-weight: 900;
            color: var(--primary);
            text-shadow: 3px 3px 0 var(--dark);
        }

        /* 对比星级展示 */
        .stars {
            color: #f59e0b;
            font-size: 24px;
        }

        /* 流程步骤 */
        .step-container {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
            gap: 20px;
            position: relative;
        }

        .step-item {
            background: #fff;
            border: 3px solid var(--dark);
            padding: 25px;
            box-shadow: 5px 5px 0 var(--dark);
            position: relative;
        }

        .step-num {
            position: absolute;
            top: -15px;
            left: 20px;
            background: var(--secondary);
            color: #fff;
            border: 2px solid var(--dark);
            width: 36px;
            height: 36px;
            display: flex;
            align-items: center;
            justify-content: center;
            font-weight: 900;
            font-size: 18px;
            transform: rotate(-5deg);
        }

        /* 案例图片展示区 */
        .portfolio-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
            gap: 30px;
        }

        .portfolio-card {
            background: #fff;
            border: 3px solid var(--dark);
            box-shadow: 6px 6px 0 var(--dark);
            overflow: hidden;
        }

        .portfolio-img-box {
            border-bottom: 3px solid var(--dark);
            height: 200px;
            overflow: hidden;
            position: relative;
        }

        .portfolio-img-box img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform 0.3s;
        }

        .portfolio-card:hover .portfolio-img-box img {
            transform: scale(1.05);
        }

        .portfolio-info {
            padding: 20px;
        }

        /* 评论区域 */
        .reviews-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
            gap: 25px;
        }

        .review-card {
            background: #fff;
            border: 3px solid var(--dark);
            padding: 25px;
            box-shadow: 5px 5px 0 var(--dark);
        }

        .reviewer-meta {
            display: flex;
            justify-content: space-between;
            align-items: center;
            margin-bottom: 15px;
            border-bottom: 2px dashed #cbd5e1;
            padding-bottom: 10px;
        }

        .reviewer-info h5 {
            font-weight: 800;
            font-size: 16px;
        }

        .reviewer-info span {
            font-size: 12px;
            color: var(--text-muted);
        }

        /* 需求匹配表单与联系板块 */
        .contact-section-wrapper {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 40px;
            align-items: start;
        }

        @media (max-width: 900px) {
            .contact-section-wrapper {
                grid-template-columns: 1fr;
            }
        }

        .form-box {
            background: #fff;
            border: 3px solid var(--dark);
            padding: 40px;
            box-shadow: 8px 8px 0 var(--dark);
        }

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

        .form-group label {
            display: block;
            font-weight: 800;
            margin-bottom: 8px;
            color: var(--dark);
        }

        .form-control {
            width: 100%;
            padding: 12px;
            border: 2px solid var(--dark);
            font-size: 15px;
            font-weight: 600;
            background: #f8fafc;
        }

        .form-control:focus {
            outline: none;
            background: #fff;
            border-color: var(--primary);
            box-shadow: 2px 2px 0 var(--dark);
        }

        .contact-info-box {
            background: #fff;
            border: 3px solid var(--dark);
            padding: 40px;
            box-shadow: 8px 8px 0 var(--dark);
        }

        .qr-code-area {
            display: flex;
            gap: 20px;
            align-items: center;
            margin-top: 30px;
            flex-wrap: wrap;
        }

        .qr-code-area img {
            width: 120px;
            height: 120px;
            border: 2px solid var(--dark);
            padding: 5px;
            background: #fff;
        }

        .contact-list {
            list-style: none;
            margin-top: 20px;
        }

        .contact-list li {
            margin-bottom: 12px;
            font-weight: 700;
        }

        /* 帮助中心与FAQ */
        .faq-accordion {
            max-width: 900px;
            margin: 0 auto;
        }

        .faq-item {
            border: 3px solid var(--dark);
            margin-bottom: 15px;
            background: #fff;
            box-shadow: 4px 4px 0 var(--dark);
        }

        .faq-question {
            padding: 20px;
            background: #fff;
            font-weight: 800;
            cursor: pointer;
            display: flex;
            justify-content: space-between;
            align-items: center;
            border-bottom: 3px solid transparent;
            transition: all 0.2s;
        }

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

        .faq-question.active {
            border-bottom-color: var(--dark);
            background: var(--primary);
        }

        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.3s ease-out;
            padding: 0 20px;
            background: #fafafa;
        }

        .faq-answer-content {
            padding: 20px 0;
            font-size: 15px;
            font-weight: 500;
            color: var(--text-main);
        }

        /* 页脚与友情链接 */
        footer {
            background: var(--dark);
            color: #fff;
            padding: 60px 0 30px;
            border-top: 5px solid var(--secondary);
        }

        .footer-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
            gap: 40px;
            margin-bottom: 40px;
        }

        .footer-col h4 {
            font-size: 18px;
            font-weight: 900;
            margin-bottom: 20px;
            color: var(--primary);
            border-bottom: 2px solid var(--primary);
            padding-bottom: 8px;
            display: inline-block;
        }

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

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

        .footer-col a {
            color: #94a3b8;
            text-decoration: none;
            font-weight: 600;
            transition: color 0.2s;
        }

        .footer-col a:hover {
            color: var(--primary);
        }

        /* 友情链接区 */
        .friend-links-box {
            border-top: 1px solid #334155;
            padding-top: 30px;
            margin-top: 30px;
        }

        .friend-links-title {
            font-size: 16px;
            font-weight: 800;
            color: #94a3b8;
            margin-bottom: 15px;
        }

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

        .friend-links-list a {
            color: #cbd5e1;
            text-decoration: none;
            font-size: 14px;
            font-weight: 700;
            background: #1e293b;
            padding: 5px 12px;
            border: 1px solid #475569;
        }

        .friend-links-list a:hover {
            background: var(--secondary);
            color: #fff;
            border-color: var(--dark);
        }

        .footer-bottom {
            text-align: center;
            border-top: 1px solid #334155;
            padding-top: 30px;
            color: #64748b;
            font-size: 14px;
            font-weight: 700;
        }

        /* 浮动客服 */
        .floating-kefu {
            position: fixed;
            bottom: 30px;
            right: 30px;
            z-index: 999;
        }

        .kefu-btn {
            background: var(--secondary);
            border: 3px solid var(--dark);
            color: #fff;
            width: 60px;
            height: 60px;
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 24px;
            font-weight: 900;
            cursor: pointer;
            box-shadow: 4px 4px 0 var(--dark);
            transition: all 0.2s;
        }

        .kefu-btn:hover {
            transform: scale(1.1);
        }

        .kefu-panel {
            position: absolute;
            bottom: 75px;
            right: 0;
            background: #fff;
            border: 3px solid var(--dark);
            padding: 20px;
            box-shadow: 6px 6px 0 var(--dark);
            width: 220px;
            display: none;
            text-align: center;
        }

        .kefu-panel.active {
            display: block;
        }

        .kefu-panel img {
            width: 150px;
            height: 150px;
            border: 2px solid var(--dark);
            margin-bottom: 10px;
        }

        .kefu-panel p {
            font-size: 14px;
            font-weight: 800;
            color: var(--dark);
        }

        /* 移动端响应式 */
        @media (max-width: 768px) {
            .menu-toggle {
                display: block;
            }

            .nav-menu {
                position: fixed;
                top: 70px;
                left: -100%;
                width: 100%;
                height: calc(100vh - 70px);
                background: #fff;
                flex-direction: column;
                padding: 40px 20px;
                transition: left 0.3s ease;
                border-top: 3px solid var(--dark);
                overflow-y: auto;
            }

            .nav-menu.active {
                left: 0;
            }

            h1.hero-title {
                font-size: 28px;
            }

            .hero {
                padding: 120px 0 60px;
            }

            section {
                padding: 50px 0;
            }
        }