:root {
            --rfq3-primary: #e65100;
            --rfq3-primary-light: #ff833a;
            --rfq3-secondary: #263238;
            --rfq3-accent: #00acc1;
            --rfq3-bg: #fdfdfd;
            --rfq3-text: #333333;
            --rfq3-white: #ffffff;
            --rfq3-spacer: 8px;
            --rfq3-radius: 16px;
            --rfq3-shadow: 0 10px 30px rgba(0,0,0,0.08);
        }

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

        body {
            font-family: "PingFang SC", "Microsoft YaHei", -apple-system, sans-serif;
            background-color: var(--rfq3-bg);
            color: var(--rfq3-text);
            line-height: 1.7;
            overflow-x: hidden;
            word-break: keep-all;
        }

        /* Layout Helpers */
        .rfq3-container {
            max-width: 1300px;
            margin: 0 auto;
            padding: 0 calc(var(--rfq3-spacer) * 3);
        }

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

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

        /* Navigation */
        .rfq3-header {
            position: sticky;
            top: 0;
            z-index: 1000;
            background: rgba(255, 255, 255, 0.9);
            backdrop-filter: blur(12px);
            border-bottom: 1px solid rgba(0,0,0,0.05);
            padding: calc(var(--rfq3-spacer) * 2) 0;
        }

        .rfq3-nav-wrapper {
            display: flex;
            justify-content: space-between;
            align-items: center;
            flex-wrap: wrap;
        }

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

        .rfq3-nav-list {
            display: flex;
            flex-wrap: wrap;
            list-style: none;
            gap: calc(var(--rfq3-spacer) * 2);
        }

        .rfq3-nav-list a {
            text-decoration: none;
            color: var(--rfq3-secondary);
            font-weight: 500;
            font-size: 0.95rem;
            padding: 6px 12px;
            border-radius: 8px;
            transition: all 0.3s ease;
        }

        .rfq3-nav-list a:hover {
            color: var(--rfq3-primary);
            background: rgba(230, 81, 0, 0.05);
        }

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

        /* Hero Section */
        .rfq3-hero {
            padding: calc(var(--rfq3-spacer) * 12) 0;
            background: linear-gradient(135deg, #fff 0%, #fef3e2 100%);
            position: relative;
            overflow: hidden;
        }

        .rfq3-hero::before {
            content: "";
            position: absolute;
            top: -10%;
            right: -5%;
            width: 40%;
            height: 120%;
            background: rgba(230, 81, 0, 0.03);
            transform: skewX(-15deg);
            z-index: 0;
        }

        .rfq3-hero-content {
            position: relative;
            z-index: 1;
            max-width: 800px;
        }

        .rfq3-hero-title {
            font-size: clamp(2.2rem, 5vw + 1rem, 4rem);
            line-height: 1.1;
            color: var(--rfq3-secondary);
            margin-bottom: calc(var(--rfq3-spacer) * 4);
            font-weight: 800;
        }

        .rfq3-hero-subtitle {
            font-size: clamp(1.1rem, 2vw + 0.5rem, 1.4rem);
            color: #555;
            margin-bottom: calc(var(--rfq3-spacer) * 6);
            max-width: 650px;
        }

        .rfq3-btn-group {
            display: flex;
            flex-wrap: wrap;
            gap: calc(var(--rfq3-spacer) * 2);
        }

        .rfq3-btn {
            display: inline-block;
            padding: 16px 40px;
            border-radius: 50px;
            text-decoration: none;
            font-weight: 600;
            transition: transform 0.3s ease, box-shadow 0.3s ease;
            text-align: center;
        }

        .rfq3-btn-primary {
            background: var(--rfq3-primary);
            color: var(--rfq3-white);
            box-shadow: 0 10px 20px rgba(230, 81, 0, 0.2);
        }

        .rfq3-btn-primary:hover {
            transform: translateY(-3px);
            box-shadow: 0 15px 30px rgba(230, 81, 0, 0.3);
        }

        /* Feature Grid */
        .rfq3-section {
            padding: calc(var(--rfq3-spacer) * 10) 0;
        }

        .rfq3-section-title {
            text-align: center;
            font-size: clamp(1.8rem, 3vw, 2.5rem);
            margin-bottom: calc(var(--rfq3-spacer) * 8);
            color: var(--rfq3-secondary);
        }

        .rfq3-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
            gap: calc(var(--rfq3-spacer) * 4);
        }

        .rfq3-card {
            background: var(--rfq3-white);
            padding: calc(var(--rfq3-spacer) * 5);
            border-radius: var(--rfq3-radius);
            box-shadow: var(--rfq3-shadow);
            border: 1px solid rgba(0,0,0,0.03);
            transition: all 0.3s ease;
        }

        .rfq3-card:hover {
            transform: translateY(-8px);
            border-color: var(--rfq3-primary-light);
        }

        .rfq3-card h3 {
            margin-bottom: calc(var(--rfq3-spacer) * 2);
            color: var(--rfq3-primary);
            font-size: 1.4rem;
        }

        /* Comparison Specs - Blueprint Style */
        .rfq3-specs {
            background: var(--rfq3-secondary);
            color: #cfd8dc;
            padding: calc(var(--rfq3-spacer) * 12) 0;
            border-radius: 40px;
            margin: 0 calc(var(--rfq3-spacer) * 2);
        }

        .rfq3-spec-item {
            flex: 1;
            min-width: 280px;
            padding: calc(var(--rfq3-spacer) * 4);
            border-left: 1px solid rgba(255,255,255,0.1);
        }

        .rfq3-spec-item h4 {
            color: var(--rfq3-primary-light);
            text-transform: uppercase;
            letter-spacing: 1px;
            margin-bottom: var(--rfq3-spacer);
        }

        .rfq3-spec-tag {
            display: inline-block;
            padding: 4px 12px;
            background: rgba(255,255,255,0.05);
            border-radius: 4px;
            font-size: 0.8rem;
            margin: 4px;
        }

        /* News Section */
        .rfq3-news-list {
            list-style: none;
        }

        .rfq3-news-item {
            padding: calc(var(--rfq3-spacer) * 3) 0;
            border-bottom: 1px solid rgba(0,0,0,0.05);
            display: flex;
            justify-content: space-between;
            align-items: center;
        }

        /* Footer */
        .rfq3-footer {
            background: #f4f4f4;
            padding: calc(var(--rfq3-spacer) * 10) 0 calc(var(--rfq3-spacer) * 4);
            margin-top: calc(var(--rfq3-spacer) * 12);
        }

        .rfq3-footer-brand {
            font-size: 1.8rem;
            font-weight: 800;
            color: var(--rfq3-secondary);
            margin-bottom: var(--rfq3-spacer);
        }

        .rfq3-footer-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
            gap: calc(var(--rfq3-spacer) * 6);
            margin-bottom: calc(var(--rfq3-spacer) * 8);
        }

        .rfq3-footer-links h5 {
            margin-bottom: calc(var(--rfq3-spacer) * 3);
            font-size: 1.1rem;
        }

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

        .rfq3-footer-links a {
            text-decoration: none;
            color: #666;
            font-size: 0.9rem;
            display: block;
            margin-bottom: 8px;
        }

        .rfq3-copyright {
            text-align: center;
            padding-top: calc(var(--rfq3-spacer) * 4);
            border-top: 1px solid rgba(0,0,0,0.05);
            font-size: 0.85rem;
            color: #999;
        }

        /* Responsive */
        @media (max-width: 768px) {
            .rfq3-header { padding: var(--rfq3-spacer) 0; }
            .rfq3-nav-wrapper { justify-content: center; gap: var(--rfq3-spacer); }
            .rfq3-nav-list { justify-content: center; }
            .rfq3-hero { text-align: center; padding: calc(var(--rfq3-spacer) * 8) 0; }
            .rfq3-btn-group { justify-content: center; }
            .rfq3-specs { border-radius: 0; margin: 0; }
            .rfq3-spec-item { border-left: none; border-bottom: 1px solid rgba(255,255,255,0.1); }
        }