:root {
            --rfq3-primary: #f26522;
            --rfq3-primary-dark: #d45418;
            --rfq3-bg: #ffffff;
            --rfq3-text: #2c3e50;
            --rfq3-text-light: #5d6d7e;
            --rfq3-accent: #e74c3c;
            --rfq3-surface: #f8f9fa;
            --rfq3-border: #e9ecef;
            --rfq3-shadow: 0 10px 30px rgba(0,0,0,0.08);
            --rfq3-container-width: 1140px;
        }

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

        body {
            font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
            line-height: 1.6;
            color: var(--rfq3-text);
            background-color: var(--rfq3-bg);
            word-break: keep-all;
            overflow-x: hidden;
        }

        /* 布局基础 */
        .rfq3-container {
            max-width: var(--rfq3-container-width);
            margin: 0 auto;
            padding: 0 24px;
            width: 100%;
        }

        .rfq3-flex {
            display: flex;
            flex-wrap: wrap;
        }

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

        /* 导航栏 */
        .rfq3-header {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            background: rgba(255, 255, 255, 0.95);
            backdrop-filter: blur(10px);
            z-index: 1000;
            border-bottom: 1px solid var(--rfq3-border);
            box-shadow: var(--rfq3-shadow);
        }

        .rfq3-nav-container {
            display: flex;
            justify-content: space-between;
            align-items: center;
            height: 80px;
            max-width: 1400px;
            margin: 0 auto;
            padding: 0 32px;
        }

        .rfq3-logo {
            flex-shrink: 0;
        }

        .rfq3-logo img {
            height: 40px;
            width: auto;
            display: block;
        }

        .rfq3-nav-menu {
            display: flex;
            flex-wrap: wrap;
            list-style: none;
            gap: 16px;
        }

        .rfq3-nav-menu li a {
            text-decoration: none;
            color: var(--rfq3-text);
            font-weight: 500;
            font-size: 14px;
            padding: 8px 12px;
            border-radius: 6px;
            transition: all 0.3s ease;
            word-break: break-word;
        }

        .rfq3-nav-menu li a:hover {
            color: var(--rfq3-primary);
            background: rgba(242, 101, 34, 0.05);
        }

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

        /* Hero 区域 - 独特垂直分割设计 */
        .rfq3-hero {
            padding-top: 160px;
            padding-bottom: 96px;
            background: linear-gradient(135deg, #fdfbfb 0%, #ebedee 100%);
            position: relative;
            overflow: hidden;
        }

        .rfq3-hero::before {
            content: "";
            position: absolute;
            top: 0;
            right: 0;
            width: 50%;
            height: 100%;
            background: rgba(242, 101, 34, 0.03);
            transform: skewX(-10deg) translateX(10%);
        }

        .rfq3-hero-content {
            position: relative;
            z-index: 2;
            text-align: center;
            max-width: 800px;
            margin: 0 auto;
        }

        .rfq3-hero-title {
            font-size: clamp(2rem, 4vw + 1rem, 3.5rem);
            line-height: 1.2;
            font-weight: 800;
            margin-bottom: 24px;
            color: #1a1a1a;
            word-break: break-word;
        }

        .rfq3-hero-subtitle {
            font-size: clamp(1rem, 2vw + 0.5rem, 1.25rem);
            color: var(--rfq3-text-light);
            margin-bottom: 48px;
            line-height: 1.8;
        }

        /* 下载卡片组件 */
        .rfq3-download-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
            gap: 32px;
            margin-top: 64px;
        }

        .rfq3-download-card {
            background: #fff;
            padding: 40px;
            border-radius: 20px;
            box-shadow: var(--rfq3-shadow);
            transition: transform 0.3s ease;
            border: 1px solid var(--rfq3-border);
            text-align: left;
            display: flex;
            flex-direction: column;
        }

        .rfq3-download-card:hover {
            transform: translateY(-8px);
        }

        .rfq3-card-tag {
            display: inline-block;
            padding: 4px 12px;
            background: rgba(242, 101, 34, 0.1);
            color: var(--rfq3-primary);
            font-size: 12px;
            font-weight: 700;
            border-radius: 4px;
            margin-bottom: 16px;
        }

        .rfq3-card-title {
            font-size: 24px;
            margin-bottom: 12px;
        }

        .rfq3-card-meta {
            font-size: 14px;
            color: var(--rfq3-text-light);
            margin-bottom: 24px;
        }

        .rfq3-btn {
            display: inline-block;
            padding: 16px 32px;
            background: var(--rfq3-primary);
            color: #fff;
            text-decoration: none;
            border-radius: 12px;
            font-weight: 600;
            text-align: center;
            transition: all 0.3s ease;
            margin-top: auto;
        }

        .rfq3-btn:hover {
            background: var(--rfq3-primary-dark);
            box-shadow: 0 8px 20px rgba(242, 101, 34, 0.3);
        }

        .rfq3-btn-outline {
            background: transparent;
            border: 2px solid var(--rfq3-primary);
            color: var(--rfq3-primary);
        }

        /* 技术规格区块 */
        .rfq3-section {
            padding: 96px 0;
            word-break: break-word;
        }

        .rfq3-section-dark {
            background: #1a1b1e;
            color: #fff;
        }

        .rfq3-section-title {
            font-size: clamp(1.5rem, 3vw, 2.5rem);
            margin-bottom: 48px;
            text-align: center;
        }

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

        .rfq3-spec-item {
            padding: 32px;
            border-radius: 16px;
            background: rgba(255, 255, 255, 0.03);
            border: 1px solid rgba(255, 255, 255, 0.1);
        }

        .rfq3-spec-header {
            font-size: 18px;
            font-weight: 700;
            margin-bottom: 16px;
            color: var(--rfq3-primary);
            display: flex;
            align-items: center;
            gap: 12px;
        }

        .rfq3-spec-desc {
            font-size: 15px;
            color: #bdc3c7;
            margin-bottom: 16px;
        }

        .rfq3-spec-tag {
            display: inline-block;
            font-size: 12px;
            background: rgba(255, 255, 255, 0.1);
            padding: 2px 8px;
            border-radius: 4px;
            margin-right: 8px;
            margin-top: 8px;
        }

        /* 二进制分析视觉模拟 (CSS Drawing) */
        .rfq3-binary-viz {
            height: 200px;
            background: #000;
            border-radius: 12px;
            margin-top: 24px;
            padding: 20px;
            font-family: monospace;
            font-size: 12px;
            color: #0f0;
            overflow: hidden;
            position: relative;
        }

        .rfq3-binary-viz::after {
            content: "0100 1101 0110 0101 0111 0010 0110 0111 0110 0101 \A 0101 0111 0110 1001 0110 1110 0100 1101 0110 0101 \A 0101 0011 0111 1001 0111 0011 0111 0100 0110 0101 \A 0110 1101 0010 0000 0101 0011 0111 1001 0110 1110";
            white-space: pre;
            opacity: 0.5;
        }

        .rfq3-binary-highlight {
            position: absolute;
            background: rgba(242, 101, 34, 0.3);
            width: 100%;
            height: 20px;
            top: 40px;
            left: 0;
            border-left: 4px solid var(--rfq3-primary);
        }

        /* 动态资讯样式 */
        .rfq3-news-list {
            list-style: none;
            max-width: 800px;
            margin: 0 auto;
        }

        .rfq3-news-item {
            padding: 24px;
            border-bottom: 1px solid var(--rfq3-border);
            display: flex;
            justify-content: space-between;
            align-items: center;
            transition: background 0.3s;
        }

        .rfq3-news-item:hover {
            background: var(--rfq3-surface);
        }

        .rfq3-news-link {
            text-decoration: none;
            color: var(--rfq3-text);
            font-weight: 600;
        }

        .rfq3-news-date {
            font-size: 14px;
            color: var(--rfq3-text-light);
        }

        /* 页脚 */
        .rfq3-footer {
            background: #f8f9fa;
            padding: 64px 0 32px;
            border-top: 1px solid var(--rfq3-border);
        }

        .rfq3-footer-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
            gap: 48px;
            margin-bottom: 48px;
        }

        .rfq3-footer-brand {
            font-size: 24px;
            font-weight: 800;
            color: var(--rfq3-primary);
            margin-bottom: 16px;
        }

        .rfq3-footer-text {
            font-size: 14px;
            color: var(--rfq3-text-light);
        }

        .rfq3-footer-links h4 {
            margin-bottom: 20px;
            font-size: 16px;
        }

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

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

        .rfq3-footer-links ul li a {
            text-decoration: none;
            color: var(--rfq3-text-light);
            font-size: 14px;
            transition: color 0.3s;
        }

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

        .rfq3-copyright {
            text-align: center;
            padding-top: 32px;
            border-top: 1px solid var(--rfq3-border);
            font-size: 13px;
            color: #999;
        }

        /* 响应式调整 */
        @media (max-width: 992px) {
            .rfq3-nav-container {
                flex-direction: column;
                height: auto;
                padding: 16px;
            }
            .rfq3-nav-menu {
                justify-content: center;
                margin-top: 16px;
                gap: 8px;
            }
            .rfq3-hero {
                padding-top: 180px;
            }
        }

        @media (max-width: 768px) {
            .rfq3-download-grid {
                grid-template-columns: 1fr;
            }
            .rfq3-spec-grid {
                grid-template-columns: 1fr;
            }
            .rfq3-hero-title {
                font-size: 28px;
            }
        }