:root {
            --rfq3-primary: #e65100;
            --rfq3-primary-light: #ffb74d;
            --rfq3-dark: #1a1a1a;
            --rfq3-gray: #f4f4f7;
            --rfq3-text-main: #2d3436;
            --rfq3-text-muted: #636e72;
            --rfq3-accent: #00b894;
            --rfq3-border: #dfe6e9;
            --rfq3-container-width: 1100px;
        }

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

        body {
            font-family: "Inter", "Segoe UI", "Microsoft YaHei", sans-serif;
            color: var(--rfq3-text-main);
            line-height: 1.7;
            background-color: #fff;
            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 4px 20px rgba(0,0,0,0.05);
        }

        .rfq3-nav-container {
            max-width: var(--rfq3-container-width);
            margin: 0 auto;
            display: flex;
            flex-wrap: wrap;
            align-items: center;
            justify-content: space-between;
            padding: 0 24px;
        }

        .rfq3-logo {
            display: flex;
            align-items: center;
            height: 70px;
            min-width: 0;
        }

        .rfq3-logo img {
            height: 45px;
            width: auto;
            object-fit: contain;
        }

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

        .rfq3-nav-item a {
            display: block;
            padding: 24px 12px;
            text-decoration: none;
            color: var(--rfq3-text-main);
            font-weight: 500;
            font-size: 0.95rem;
            transition: all 0.3s ease;
            word-break: keep-all;
        }

        .rfq3-nav-item a:hover {
            color: var(--rfq3-primary);
        }

        .rfq3-nav-item a.active {
            color: var(--rfq3-primary);
            position: relative;
        }

        .rfq3-nav-item a.active::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 50%;
            transform: translateX(-50%);
            width: 20px;
            height: 3px;
            background: var(--rfq3-primary);
            border-radius: 2px 2px 0 0;
        }

        /* Hero 区域 - 独特对角线分割设计 */
        .rfq3-hero {
            position: relative;
            background: linear-gradient(135deg, #1a1a1a 0%, #2d3436 100%);
            color: #fff;
            padding: 96px 24px;
            overflow: hidden;
        }

        .rfq3-hero::before {
            content: '';
            position: absolute;
            top: 0;
            right: 0;
            width: 50%;
            height: 100%;
            background: rgba(230, 81, 0, 0.05);
            transform: skewX(-15deg) translateX(20%);
        }

        .rfq3-hero-content {
            max-width: var(--rfq3-container-width);
            margin: 0 auto;
            position: relative;
            z-index: 2;
            text-align: center;
        }

        .rfq3-hero-tag {
            display: inline-block;
            background: var(--rfq3-primary);
            padding: 4px 16px;
            border-radius: 20px;
            font-size: 0.85rem;
            text-transform: uppercase;
            letter-spacing: 1px;
            margin-bottom: 24px;
        }

        .rfq3-hero-title {
            font-size: clamp(2rem, 5vw, 3.5rem);
            line-height: 1.2;
            font-weight: 800;
            margin-bottom: 24px;
            word-break: keep-all;
        }

        .rfq3-hero-subtitle {
            font-size: clamp(1rem, 2vw + 0.5rem, 1.4rem);
            color: rgba(255,255,255,0.8);
            max-width: 800px;
            margin: 0 auto 40px;
            word-break: break-word;
        }

        /* 特色规格 - 网格布局 */
        .rfq3-spec-section {
            padding: 96px 24px;
            background: var(--rfq3-gray);
        }

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

        .rfq3-section-title h2 {
            font-size: clamp(1.5rem, 3vw, 2.5rem);
            color: var(--rfq3-dark);
            margin-bottom: 16px;
        }

        .rfq3-spec-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
            gap: 32px;
            max-width: var(--rfq3-container-width);
            margin: 0 auto;
        }

        .rfq3-spec-card {
            background: #fff;
            padding: 40px;
            border-radius: 16px;
            box-shadow: 0 10px 30px rgba(0,0,0,0.03);
            transition: transform 0.3s ease, box-shadow 0.3s ease;
            border: 1px solid var(--rfq3-border);
            display: flex;
            flex-direction: column;
            min-width: 0;
        }

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

        .rfq3-spec-icon {
            width: 60px;
            height: 60px;
            background: rgba(230, 81, 0, 0.1);
            border-radius: 12px;
            display: flex;
            align-items: center;
            justify-content: center;
            margin-bottom: 24px;
            color: var(--rfq3-primary);
            font-size: 1.5rem;
            font-weight: bold;
        }

        .rfq3-spec-card h3 {
            font-size: 1.5rem;
            margin-bottom: 16px;
            color: var(--rfq3-dark);
        }

        .rfq3-spec-card p {
            color: var(--rfq3-text-muted);
            margin-bottom: 20px;
            flex-grow: 1;
            word-break: break-word;
        }

        .rfq3-spec-detail {
            font-size: 0.9rem;
            padding: 12px;
            background: var(--rfq3-gray);
            border-radius: 8px;
            border-left: 4px solid var(--rfq3-primary);
        }

        /* 核心合并技巧区块 - 错位排版 */
        .rfq3-tips-section {
            padding: 96px 24px;
            max-width: var(--rfq3-container-width);
            margin: 0 auto;
        }

        .rfq3-flex-container {
            display: flex;
            flex-wrap: wrap;
            align-items: center;
            gap: 64px;
            margin-bottom: 96px;
        }

        .rfq3-flex-content {
            flex: 1;
            min-width: 320px;
            word-break: break-word;
        }

        .rfq3-flex-visual {
            flex: 1;
            min-width: 320px;
            background: linear-gradient(45deg, var(--rfq3-primary), var(--rfq3-primary-light));
            height: 400px;
            border-radius: 30% 70% 70% 30% / 30% 30% 70% 70%;
            display: flex;
            align-items: center;
            justify-content: center;
            color: #fff;
            position: relative;
        }

        .rfq3-visual-inner {
            background: rgba(255, 255, 255, 0.1);
            padding: 32px;
            border-radius: 16px;
            backdrop-filter: blur(5px);
            border: 1px solid rgba(255,255,255,0.2);
            text-align: center;
        }

        .rfq3-tip-item {
            margin-bottom: 32px;
            padding-left: 24px;
            border-left: 2px solid var(--rfq3-primary);
        }

        .rfq3-tip-item h4 {
            font-size: 1.25rem;
            margin-bottom: 8px;
            color: var(--rfq3-primary);
        }

        /* 动态内容区块 */
        .rfq3-dynamic-section {
            padding: 80px 24px;
            background: #fff;
            border-top: 1px solid var(--rfq3-border);
        }

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

        .rfq3-footer-grid {
            max-width: var(--rfq3-container-width);
            margin: 0 auto;
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
            gap: 48px;
            margin-bottom: 64px;
        }

        .rfq3-footer-brand h2 {
            color: #fff;
            font-size: 1.8rem;
            margin-bottom: 24px;
        }

        .rfq3-footer-links h3 {
            color: #fff;
            font-size: 1.1rem;
            margin-bottom: 24px;
        }

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

        .rfq3-footer-links li {
            margin-bottom: 12px;
        }

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

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

        .rfq3-copyright {
            max-width: var(--rfq3-container-width);
            margin: 0 auto;
            padding-top: 40px;
            border-top: 1px solid rgba(255,255,255,0.1);
            text-align: center;
            font-size: 0.9rem;
        }

        /* 响应式调整 */
        @media (max-width: 768px) {
            .rfq3-nav-container {
                justify-content: center;
                padding: 16px;
            }
            .rfq3-nav-menu {
                justify-content: center;
                margin-top: 10px;
            }
            .rfq3-nav-item a {
                padding: 10px 8px;
                font-size: 0.85rem;
            }
            .rfq3-flex-visual {
                height: 300px;
                border-radius: 16px;
            }
            .rfq3-hero {
                padding: 64px 24px;
            }
        }