:root {
            --rfq3-primary: #0066cc;
            --rfq3-secondary: #f39c12;
            --rfq3-dark: #2c3e50;
            --rfq3-light: #f8f9fa;
            --rfq3-accent: #3498db;
            --rfq3-text: #333333;
            --rfq3-spacing-unit: 8px;
            --rfq3-container-width: 1300px;
            --rfq3-transition: all 0.3s cubic-bezier(0.25, 0.8, 0.25, 1);
        }

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

        body {
            font-family: 'PingFang SC', 'Microsoft YaHei', sans-serif;
            color: var(--rfq3-text);
            line-height: 1.7;
            background-color: #ffffff;
            overflow-x: hidden;
        }

        /* 排版系统 */
        h1, h2, h3 {
            line-height: 1.3;
            word-break: keep-all;
            white-space: normal;
        }

        p {
            word-break: break-word;
            overflow-wrap: break-word;
            margin-bottom: 1.5rem;
        }

        /* 导航栏 */
        .rfq3-header {
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            z-index: 1000;
            background: rgba(255, 255, 255, 0.95);
            backdrop-filter: blur(10px);
            box-shadow: 0 2px 20px rgba(0,0,0,0.05);
            padding: 15px 0;
        }

        .rfq3-nav-container {
            max-width: var(--rfq3-container-width);
            margin: 0 auto;
            padding: 0 5%;
            display: flex;
            flex-wrap: wrap;
            justify-content: space-between;
            align-items: center;
        }

        .rfq3-logo {
            flex: 0 0 auto;
            min-width: 0;
        }

        .rfq3-logo img {
            height: 45px;
            width: auto;
            display: block;
        }

        .rfq3-menu {
            display: flex;
            flex-wrap: wrap;
            list-style: none;
            gap: 15px;
            min-width: 0;
        }

        .rfq3-menu li a {
            text-decoration: none;
            color: var(--rfq3-dark);
            font-size: 0.95rem;
            font-weight: 500;
            padding: 8px 12px;
            border-radius: 4px;
            transition: var(--rfq3-transition);
        }

        .rfq3-menu li a:hover {
            color: var(--rfq3-primary);
            background: rgba(0,102,204,0.05);
        }

        .rfq3-menu li a.rfq3-active {
            color: #fff;
            background: var(--rfq3-primary);
        }

        /* 英雄区 - 独特布局 */
        .rfq3-hero {
            padding: 160px 0 100px;
            background: linear-gradient(135deg, #f5f7fa 0%, #c3cfe2 100%);
            position: relative;
            clip-path: polygon(0 0, 100% 0, 100% 90%, 0 100%);
        }

        .rfq3-hero-content {
            max-width: var(--rfq3-container-width);
            margin: 0 auto;
            padding: 0 5%;
            display: flex;
            flex-wrap: wrap;
            align-items: center;
            gap: 48px;
        }

        .rfq3-hero-text {
            flex: 1 1 500px;
            min-width: 0;
        }

        .rfq3-hero-title {
            font-size: clamp(2rem, 4vw + 1rem, 3.5rem);
            font-weight: 800;
            color: var(--rfq3-dark);
            margin-bottom: 24px;
        }

        .rfq3-hero-subtitle {
            font-size: clamp(1.1rem, 1.5vw + 0.5rem, 1.4rem);
            color: #555;
            margin-bottom: 40px;
            border-left: 5px solid var(--rfq3-secondary);
            padding-left: 20px;
        }

        .rfq3-hero-cta {
            display: inline-block;
            padding: 16px 40px;
            background: var(--rfq3-primary);
            color: #fff;
            text-decoration: none;
            border-radius: 50px;
            font-weight: 600;
            box-shadow: 0 10px 20px rgba(0,102,204,0.2);
            transition: var(--rfq3-transition);
        }

        .rfq3-hero-cta:hover {
            transform: translateY(-3px);
            box-shadow: 0 15px 30px rgba(0,102,204,0.3);
        }

        /* 诊断卡片区 */
        .rfq3-diagnosis {
            padding: 80px 0;
            max-width: var(--rfq3-container-width);
            margin: 0 auto;
            padding: 80px 5%;
        }

        .rfq3-section-head {
            text-align: center;
            margin-bottom: 64px;
        }

        .rfq3-section-title {
            font-size: clamp(1.8rem, 3vw, 2.5rem);
            color: var(--rfq3-dark);
            margin-bottom: 16px;
        }

        .rfq3-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
            gap: 32px;
        }

        .rfq3-card {
            background: #fff;
            padding: 40px;
            border-radius: 16px;
            box-shadow: 0 10px 40px rgba(0,0,0,0.05);
            transition: var(--rfq3-transition);
            border: 1px solid #eee;
        }

        .rfq3-card:hover {
            transform: translateY(-10px);
            border-color: var(--rfq3-primary);
        }

        .rfq3-card h3 {
            margin-bottom: 20px;
            color: var(--rfq3-primary);
        }

        /* 技术规格区 (使用数据内容) */
        .rfq3-tech-specs {
            background: var(--rfq3-dark);
            color: #fff;
            padding: 96px 5%;
        }

        .rfq3-tech-wrapper {
            max-width: var(--rfq3-container-width);
            margin: 0 auto;
            display: flex;
            flex-wrap: wrap;
            gap: 48px;
        }

        .rfq3-tech-item {
            flex: 1 1 300px;
            min-width: 0;
            padding: 32px;
            background: rgba(255,255,255,0.05);
            border-radius: 12px;
        }

        .rfq3-tech-item h4 {
            color: var(--rfq3-secondary);
            margin-bottom: 15px;
            font-size: 1.2rem;
            text-transform: uppercase;
            letter-spacing: 1px;
        }

        .rfq3-tech-tag {
            display: inline-block;
            background: var(--rfq3-accent);
            padding: 4px 12px;
            border-radius: 20px;
            font-size: 0.8rem;
            margin-bottom: 15px;
        }

        /* 解决方案步骤 */
        .rfq3-solutions {
            padding: 96px 5%;
            max-width: var(--rfq3-container-width);
            margin: 0 auto;
        }

        .rfq3-step-row {
            display: flex;
            flex-wrap: wrap;
            align-items: center;
            gap: 64px;
            margin-bottom: 80px;
        }

        .rfq3-step-row:nth-child(even) {
            flex-direction: row-reverse;
        }

        .rfq3-step-content {
            flex: 1 1 450px;
            min-width: 0;
        }

        .rfq3-step-num {
            font-size: 4rem;
            font-weight: 900;
            color: rgba(0,102,204,0.1);
            line-height: 1;
        }

        /* 动态内容区 */
        .rfq3-latest {
            background: #fdfdfd;
            padding: 80px 5%;
            border-top: 1px solid #eee;
        }

        .rfq3-article-list {
            max-width: var(--rfq3-container-width);
            margin: 0 auto;
            display: grid;
            grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
            gap: 24px;
        }

        /* 页脚 */
        .rfq3-footer {
            background: #1a1a1a;
            color: #ccc;
            padding: 80px 5% 40px;
        }

        .rfq3-footer-grid {
            max-width: var(--rfq3-container-width);
            margin: 0 auto;
            display: flex;
            flex-wrap: wrap;
            justify-content: space-between;
            gap: 40px;
            border-bottom: 1px solid #333;
            padding-bottom: 40px;
        }

        .rfq3-footer-brand {
            flex: 1 1 300px;
            min-width: 0;
        }

        .rfq3-footer-brand h2 {
            color: #fff;
            margin-bottom: 20px;
        }

        .rfq3-footer-links {
            flex: 1 1 200px;
            min-width: 0;
        }

        .rfq3-footer-links h4 {
            color: #fff;
            margin-bottom: 20px;
        }

        .rfq3-footer-links ul {
            list-style: none;
        }

        .rfq3-footer-links li {
            margin-bottom: 10px;
        }

        .rfq3-footer-links a {
            color: #aaa;
            text-decoration: none;
            transition: 0.3s;
        }

        .rfq3-footer-links a:hover {
            color: var(--rfq3-primary);
        }

        .rfq3-copyright {
            text-align: center;
            padding-top: 30px;
            font-size: 0.9rem;
        }

        /* 响应式调整 */
        @media (max-width: 768px) {
            .rfq3-menu {
                display: none; /* 简化演示：移动端隐藏菜单或使用汉堡菜单 */
            }
            .rfq3-hero {
                clip-path: none;
                padding-top: 120px;
            }
            .rfq3-step-row {
                text-align: center;
            }
            .rfq3-step-row:nth-child(even) {
                flex-direction: row;
            }
        }