:root {
            --rfq3-primary: #0052cc;
            --rfq3-secondary: #0747a6;
            --rfq3-accent: #00b8d9;
            --rfq3-diff-add: #e6ffed;
            --rfq3-diff-remove: #ffeef0;
            --rfq3-text-dark: #172b4d;
            --rfq3-text-light: #6b778c;
            --rfq3-bg-soft: #f4f5f7;
            --rfq3-white: #ffffff;
            --rfq3-radius: 12px;
            --rfq3-container-width: 1100px;
            --rfq3-transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
        }

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

        body {
            font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, "Noto Sans", sans-serif;
            line-height: 1.7;
            color: var(--rfq3-text-dark);
            background-color: var(--rfq3-white);
            overflow-x: hidden;
            word-break: keep-all;
        }

        /* 导航系统 - 悬浮岛屿设计 */
        .rfq3-nav-wrapper {
            position: fixed;
            top: 20px;
            left: 50%;
            transform: translateX(-50%);
            width: 95%;
            max-width: 1300px;
            z-index: 1000;
        }

        .rfq3-navbar {
            display: flex;
            flex-wrap: wrap;
            align-items: center;
            justify-content: space-between;
            background: rgba(255, 255, 255, 0.85);
            backdrop-filter: blur(12px);
            padding: 10px 24px;
            border-radius: 50px;
            border: 1px solid rgba(0, 82, 204, 0.1);
            box-shadow: 0 10px 30px rgba(0, 0, 0, 0.05);
        }

        .rfq3-logo {
            flex-shrink: 0;
            min-width: 0;
            display: flex;
            align-items: center;
        }

        .rfq3-logo img {
            height: 36px;
            width: auto;
            border-radius: 6px;
        }

        .rfq3-nav-menu {
            display: flex;
            flex-wrap: wrap;
            list-style: none;
            gap: 4px;
        }

        .rfq3-nav-item {
            min-width: 0;
        }

        .rfq3-nav-link {
            text-decoration: none;
            color: var(--rfq3-text-dark);
            padding: 8px 14px;
            border-radius: 20px;
            font-size: 0.95rem;
            font-weight: 500;
            transition: var(--rfq3-transition);
            display: block;
        }

        .rfq3-nav-link:hover {
            background: rgba(0, 82, 204, 0.05);
            color: var(--rfq3-primary);
        }

        .rfq3-nav-link.active {
            background: var(--rfq3-primary);
            color: var(--rfq3-white);
        }

        /* Hero 区 - 抽象合并视觉 */
        .rfq3-hero {
            padding: 180px 24px 100px;
            background: radial-gradient(circle at top right, #e6f0ff 0%, #ffffff 60%);
            text-align: center;
            position: relative;
            overflow: hidden;
        }

        .rfq3-hero::before {
            content: "";
            position: absolute;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            background-image: linear-gradient(90deg, transparent 49%, rgba(0,82,204,0.03) 50%, transparent 51%);
            background-size: 40px 40px;
            pointer-events: none;
        }

        .rfq3-container {
            max-width: var(--rfq3-container-width);
            margin: 0 auto;
            width: 100%;
            padding: 0 24px;
            word-break: break-word;
        }

        .rfq3-hero-title {
            font-size: clamp(2rem, 5vw, 3.5rem);
            line-height: 1.2;
            font-weight: 800;
            color: var(--rfq3-text-dark);
            margin-bottom: 24px;
            letter-spacing: -1px;
        }

        .rfq3-hero-subtitle {
            font-size: clamp(1rem, 2vw + 0.5rem, 1.4rem);
            color: var(--rfq3-text-light);
            max-width: 800px;
            margin: 0 auto 40px;
        }

        /* 功能卡片 - 动态网格 */
        .rfq3-section {
            padding: 80px 0;
        }

        .rfq3-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
            gap: 32px;
            margin-top: 48px;
        }

        .rfq3-card {
            background: var(--rfq3-white);
            border: 1px solid #ebeef5;
            padding: 40px;
            border-radius: var(--rfq3-radius);
            transition: var(--rfq3-transition);
            display: flex;
            flex-direction: column;
            position: relative;
            min-width: 0;
        }

        .rfq3-card:hover {
            transform: translateY(-8px);
            box-shadow: 0 20px 40px rgba(0, 0, 0, 0.08);
            border-color: var(--rfq3-primary);
        }

        .rfq3-card-tag {
            display: inline-block;
            background: var(--rfq3-diff-add);
            color: #24b47e;
            padding: 4px 12px;
            border-radius: 4px;
            font-size: 0.8rem;
            font-weight: bold;
            margin-bottom: 16px;
            align-self: flex-start;
        }

        .rfq3-card-title {
            font-size: 1.5rem;
            font-weight: 700;
            margin-bottom: 16px;
            color: var(--rfq3-text-dark);
        }

        .rfq3-card-desc {
            color: var(--rfq3-text-light);
            font-size: 1rem;
            line-height: 1.6;
        }

        /* 核心技术展示 - 蓝图风格 */
        .rfq3-tech-blueprint {
            background: #001a41;
            color: #fff;
            padding: 80px 24px;
            border-radius: 24px;
            margin: 40px 0;
            position: relative;
            overflow: hidden;
        }

        .rfq3-tech-header {
            margin-bottom: 48px;
            border-left: 4px solid var(--rfq3-accent);
            padding-left: 24px;
        }

        .rfq3-tech-list {
            display: flex;
            flex-wrap: wrap;
            gap: 24px;
        }

        .rfq3-tech-item {
            flex: 1;
            min-width: 300px;
            background: rgba(255, 255, 255, 0.05);
            padding: 30px;
            border-radius: 16px;
            border: 1px solid rgba(255, 255, 255, 0.1);
        }

        .rfq3-tech-label {
            color: var(--rfq3-accent);
            text-transform: uppercase;
            font-size: 0.8rem;
            font-weight: 800;
            letter-spacing: 2px;
            margin-bottom: 12px;
            display: block;
        }

        /* 动态内容区块 */
        .rfq3-news-section {
            background: var(--rfq3-bg-soft);
            border-radius: 32px;
            padding: 64px;
        }

        .rfq3-news-header {
            display: flex;
            flex-wrap: wrap;
            justify-content: space-between;
            align-items: flex-end;
            margin-bottom: 40px;
            gap: 20px;
        }

        /* 按钮设计 */
        .rfq3-btn {
            display: inline-block;
            padding: 14px 32px;
            border-radius: 30px;
            font-weight: 600;
            text-decoration: none;
            transition: var(--rfq3-transition);
            cursor: pointer;
            border: none;
            text-align: center;
        }

        .rfq3-btn-primary {
            background: var(--rfq3-primary);
            color: var(--rfq3-white);
            box-shadow: 0 4px 15px rgba(0, 82, 204, 0.3);
        }

        .rfq3-btn-primary:hover {
            background: var(--rfq3-secondary);
            transform: scale(1.05);
        }

        /* 响应式调整 */
        @media (max-width: 768px) {
            .rfq3-nav-menu {
                display: none; /* 简化移动端，实际可加汉堡菜单 */
            }
            .rfq3-hero {
                padding-top: 140px;
            }
            .rfq3-news-section {
                padding: 32px 20px;
            }
            .rfq3-tech-blueprint {
                padding: 40px 20px;
            }
        }

        /* Footer */
        .rfq3-footer {
            background: var(--rfq3-text-dark);
            color: rgba(255, 255, 255, 0.7);
            padding: 80px 24px 40px;
            margin-top: 80px;
        }

        .rfq3-footer-content {
            display: flex;
            flex-wrap: wrap;
            justify-content: space-between;
            gap: 48px;
            border-bottom: 1px solid rgba(255, 255, 255, 0.1);
            padding-bottom: 40px;
        }

        .rfq3-footer-brand {
            flex: 1;
            min-width: 250px;
        }

        .rfq3-footer-title {
            color: #fff;
            font-size: 1.8rem;
            font-weight: 800;
            margin-bottom: 20px;
        }

        .rfq3-footer-links {
            display: flex;
            flex-wrap: wrap;
            gap: 64px;
        }

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

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

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

        .rfq3-footer-group a {
            color: inherit;
            text-decoration: none;
            transition: color 0.2s;
        }

        .rfq3-footer-group a:hover {
            color: var(--rfq3-accent);
        }

        .rfq3-copyright {
            text-align: center;
            padding-top: 40px;
            font-size: 0.9rem;
        }