:root {
            --rfq3-primary: #f39c12;
            --rfq3-primary-dark: #d35400;
            --rfq3-secondary: #2c3e50;
            --rfq3-accent: #3498db;
            --rfq3-bg-light: #f8f9fa;
            --rfq3-bg-white: #ffffff;
            --rfq3-text-main: #2d3436;
            --rfq3-text-muted: #636e72;
            --rfq3-border: #dfe6e9;
            --rfq3-success: #27ae60;
            --rfq3-container-width: 1320px;
            --rfq3-spacing: 8px;
        }

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

        body {
            font-family: "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
            line-height: 1.7;
            color: var(--rfq3-text-main);
            background-color: var(--rfq3-bg-light);
            overflow-x: hidden;
        }

        /* 导航系统 */
        .rfq3-header {
            position: sticky;
            top: 0;
            z-index: 1000;
            background: rgba(255, 255, 255, 0.95);
            backdrop-filter: blur(10px);
            border-bottom: 1px solid var(--rfq3-border);
            box-shadow: 0 2px 15px rgba(0,0,0,0.05);
        }

        .rfq3-nav-container {
            max-width: var(--rfq3-container-width);
            margin: 0 auto;
            padding: 0 calc(var(--rfq3-spacing) * 3);
            display: flex;
            flex-wrap: wrap;
            align-items: center;
            justify-content: space-between;
            min-height: 80px;
        }

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

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

        .rfq3-nav-menu {
            display: flex;
            flex-wrap: wrap;
            list-style: none;
            gap: calc(var(--rfq3-spacing) * 2);
            min-width: 0;
        }

        .rfq3-nav-item a {
            text-decoration: none;
            color: var(--rfq3-secondary);
            font-weight: 500;
            font-size: 0.95rem;
            padding: calc(var(--rfq3-spacing) * 1) calc(var(--rfq3-spacing) * 1.5);
            border-radius: 6px;
            transition: all 0.3s ease;
            white-space: nowrap;
        }

        .rfq3-nav-item a:hover {
            color: var(--rfq3-primary);
            background: rgba(243, 156, 18, 0.08);
        }

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

        /* Hero 区域 - 独特非对称布局 */
        .rfq3-hero {
            padding: calc(var(--rfq3-spacing) * 12) 0;
            background: linear-gradient(135deg, #2c3e50 0%, #000000 100%);
            color: var(--rfq3-bg-white);
            position: relative;
            overflow: hidden;
        }

        .rfq3-hero::before {
            content: "";
            position: absolute;
            top: -10%;
            right: -10%;
            width: 50%;
            height: 120%;
            background: radial-gradient(circle, rgba(243, 156, 18, 0.15) 0%, transparent 70%);
            transform: rotate(-15deg);
        }

        .rfq3-hero-wrapper {
            max-width: var(--rfq3-container-width);
            margin: 0 auto;
            padding: 0 calc(var(--rfq3-spacing) * 3);
            display: flex;
            flex-wrap: wrap;
            align-items: center;
            gap: calc(var(--rfq3-spacing) * 6);
        }

        .rfq3-hero-content {
            flex: 1 1 500px;
            min-width: 0;
            z-index: 2;
        }

        .rfq3-hero-title {
            font-size: clamp(2rem, 4vw + 1rem, 3.5rem);
            line-height: 1.2;
            margin-bottom: calc(var(--rfq3-spacing) * 3);
            font-weight: 800;
            word-break: keep-all;
        }

        .rfq3-hero-subtitle {
            font-size: clamp(1.1rem, 2vw + 0.5rem, 1.4rem);
            color: rgba(255, 255, 255, 0.85);
            margin-bottom: calc(var(--rfq3-spacing) * 4);
            max-width: 600px;
            word-break: break-word;
        }

        /* 模拟三路合并视觉组件 */
        .rfq3-hero-visual {
            flex: 1 1 400px;
            min-width: 0;
            display: flex;
            justify-content: center;
            perspective: 1000px;
        }

        .rfq3-merge-preview {
            width: 100%;
            max-width: 500px;
            background: #1e1e1e;
            border-radius: 12px;
            padding: calc(var(--rfq3-spacing) * 2);
            box-shadow: 0 30px 60px rgba(0,0,0,0.5);
            border: 1px solid rgba(255,255,255,0.1);
            transform: rotateY(-10deg) rotateX(5deg);
        }

        .rfq3-merge-line {
            height: 12px;
            margin-bottom: 8px;
            border-radius: 4px;
            background: #333;
        }

        .rfq3-merge-line.conflict {
            background: linear-gradient(90deg, #e74c3c 30%, #f39c12 70%);
            width: 80%;
        }

        /* 内容板块样式 */
        .rfq3-section {
            padding: calc(var(--rfq3-spacing) * 10) calc(var(--rfq3-spacing) * 3);
            max-width: var(--rfq3-container-width);
            margin: 0 auto;
        }

        .rfq3-section-head {
            text-align: center;
            margin-bottom: calc(var(--rfq3-spacing) * 8);
        }

        .rfq3-section-title {
            font-size: clamp(1.8rem, 3vw, 2.5rem);
            color: var(--rfq3-secondary);
            margin-bottom: calc(var(--rfq3-spacing) * 2);
            position: relative;
            display: inline-block;
        }

        .rfq3-section-title::after {
            content: "";
            position: absolute;
            bottom: -10px;
            left: 50%;
            transform: translateX(-50%);
            width: 60px;
            height: 4px;
            background: var(--rfq3-primary);
            border-radius: 2px;
        }

        /* 规格卡片网格 */
        .rfq3-spec-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
            gap: calc(var(--rfq3-spacing) * 4);
        }

        .rfq3-spec-card {
            background: var(--rfq3-bg-white);
            padding: calc(var(--rfq3-spacing) * 5);
            border-radius: 16px;
            box-shadow: 0 10px 30px rgba(0,0,0,0.03);
            border: 1px solid var(--rfq3-border);
            transition: transform 0.3s ease, box-shadow 0.3s ease;
            display: flex;
            flex-direction: column;
        }

        .rfq3-spec-card:hover {
            transform: translateY(-10px);
            box-shadow: 0 20px 40px rgba(0,0,0,0.08);
            border-color: var(--rfq3-primary);
        }

        .rfq3-spec-tag {
            display: inline-block;
            padding: 4px 12px;
            background: rgba(243, 156, 18, 0.1);
            color: var(--rfq3-primary-dark);
            border-radius: 20px;
            font-size: 0.8rem;
            font-weight: 700;
            margin-bottom: calc(var(--rfq3-spacing) * 2);
            text-transform: uppercase;
        }

        .rfq3-spec-name {
            font-size: 1.4rem;
            margin-bottom: calc(var(--rfq3-spacing) * 2);
            color: var(--rfq3-secondary);
        }

        .rfq3-spec-desc {
            font-size: 1rem;
            color: var(--rfq3-text-muted);
            margin-bottom: calc(var(--rfq3-spacing) * 3);
            flex-grow: 1;
        }

        .rfq3-spec-meta {
            background: var(--rfq3-bg-light);
            padding: calc(var(--rfq3-spacing) * 2);
            border-radius: 8px;
            font-size: 0.9rem;
        }

        /* 详情列表 */
        .rfq3-detail-box {
            background: var(--rfq3-bg-white);
            border-radius: 20px;
            overflow: hidden;
            display: flex;
            flex-wrap: wrap;
            box-shadow: 0 20px 50px rgba(0,0,0,0.05);
            margin-top: calc(var(--rfq3-spacing) * 6);
        }

        .rfq3-detail-content {
            flex: 1 1 500px;
            padding: calc(var(--rfq3-spacing) * 6);
            min-width: 0;
        }

        .rfq3-detail-sidebar {
            flex: 1 1 300px;
            background: var(--rfq3-secondary);
            color: var(--rfq3-bg-white);
            padding: calc(var(--rfq3-spacing) * 6);
            min-width: 0;
        }

        .rfq3-list {
            list-style: none;
        }

        .rfq3-list-item {
            padding: calc(var(--rfq3-spacing) * 1.5) 0;
            border-bottom: 1px solid rgba(255,255,255,0.1);
            display: flex;
            align-items: center;
        }

        /* 文章动态区块 */
        .rfq3-dynamic-section {
            background: #f1f3f5;
            padding: calc(var(--rfq3-spacing) * 10) 0;
        }

        /* 页脚 */
        .rfq3-footer {
            background: var(--rfq3-secondary);
            color: #bdc3c7;
            padding: calc(var(--rfq3-spacing) * 8) calc(var(--rfq3-spacing) * 3);
        }

        .rfq3-footer-grid {
            max-width: var(--rfq3-container-width);
            margin: 0 auto;
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
            gap: calc(var(--rfq3-spacing) * 6);
        }

        .rfq3-footer-brand {
            font-size: 1.8rem;
            font-weight: 800;
            color: var(--rfq3-bg-white);
            margin-bottom: calc(var(--rfq3-spacing) * 2);
        }

        .rfq3-footer-bottom {
            margin-top: calc(var(--rfq3-spacing) * 6);
            padding-top: calc(var(--rfq3-spacing) * 4);
            border-top: 1px solid rgba(255,255,255,0.1);
            text-align: center;
            font-size: 0.85rem;
        }

        /* 响应式适配 */
        @media (max-width: 768px) {
            .rfq3-nav-container {
                padding: var(--rfq3-spacing);
            }
            .rfq3-nav-menu {
                display: none; /* 简化演示：移动端隐藏菜单，实际开发应使用汉堡菜单 */
            }
            .rfq3-hero {
                padding: calc(var(--rfq3-spacing) * 6) 0;
                text-align: center;
            }
            .rfq3-hero-visual {
                display: none;
            }
        }