:root {
            --r50ey1-primary: #4285F4;
            --r50ey1-accent: #FBBC04;
            --r50ey1-error: #EA4335;
            --r50ey1-success: #34A853;
            --r50ey1-text-main: #202124;
            --r50ey1-text-sub: #5f6368;
            --r50ey1-bg-light: #ffffff;
            --r50ey1-bg-soft: #f8f9fa;
            --r50ey1-radius: 16px;
            --r50ey1-spacing-unit: 8px;
            --r50ey1-max-width: 1400px;
        }

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

        body {
            font-family: "Segoe UI", Roboto, "Helvetica Neue", Arial, "Microsoft YaHei", sans-serif;
            color: var(--r50ey1-text-main);
            line-height: 1.6;
            background-color: var(--r50ey1-bg-light);
            word-break: break-word;
            overflow-wrap: break-word;
        }

        /* 导航系统 */
        .r50ey1-nav-wrapper {
            position: sticky;
            top: 0;
            z-index: 1000;
            background: rgba(255, 255, 255, 0.9);
            backdrop-filter: blur(10px);
            border-bottom: 1px solid rgba(0,0,0,0.05);
        }

        .r50ey1-nav-container {
            max-width: var(--r50ey1-max-width);
            margin: 0 auto;
            display: flex;
            flex-wrap: wrap;
            align-items: center;
            justify-content: space-between;
            padding: 16px 24px;
        }

        .r50ey1-logo {
            flex: 0 0 auto;
            min-width: 0;
            margin-right: 32px;
        }

        .r50ey1-logo img {
            height: 32px;
            display: block;
        }

        .r50ey1-menu {
            display: flex;
            flex-wrap: wrap;
            list-style: none;
            gap: 24px;
            min-width: 0;
        }

        .r50ey1-menu li {
            min-width: 0;
        }

        .r50ey1-menu a {
            text-decoration: none;
            color: var(--r50ey1-text-sub);
            font-size: 15px;
            font-weight: 500;
            transition: color 0.3s ease;
            white-space: nowrap;
        }

        .r50ey1-menu a:hover {
            color: var(--r50ey1-primary);
        }

        .r50ey1-menu a.active {
            color: var(--r50ey1-primary);
            position: relative;
        }

        .r50ey1-menu a.active::after {
            content: '';
            position: absolute;
            bottom: -4px;
            left: 0;
            width: 100%;
            height: 2px;
            background: var(--r50ey1-primary);
        }

        /* Hero 视觉区 - 采用对角线分割设计 */
        .r50ey1-hero {
            position: relative;
            padding: 96px 24px;
            background: linear-gradient(135deg, #f1f3f4 0%, #ffffff 100%);
            overflow: hidden;
        }

        .r50ey1-hero-content {
            max-width: 900px;
            margin: 0 auto;
            text-align: center;
            position: relative;
            z-index: 2;
        }

        .r50ey1-hero h1 {
            font-size: clamp(2.5rem, 5vw + 1rem, 4.5rem);
            line-height: 1.1;
            margin-bottom: 24px;
            font-weight: 700;
            letter-spacing: -1px;
        }

        .r50ey1-hero p {
            font-size: clamp(1.1rem, 1.5vw + 0.5rem, 1.5rem);
            color: var(--r50ey1-text-sub);
            max-width: 700px;
            margin: 0 auto 48px;
            word-break: keep-all;
        }

        .r50ey1-download-btn {
            display: inline-block;
            background: var(--r50ey1-primary);
            color: white;
            padding: 18px 48px;
            border-radius: 50px;
            font-size: 18px;
            font-weight: 600;
            text-decoration: none;
            box-shadow: 0 4px 15px rgba(66, 133, 244, 0.3);
            transition: transform 0.3s ease, box-shadow 0.3s ease;
        }

        .r50ey1-download-btn:hover {
            transform: translateY(-3px);
            box-shadow: 0 8px 25px rgba(66, 133, 244, 0.4);
            background: #1a73e8;
        }

        /* 核心特色区 - 多平台展示 */
        .r50ey1-section-multi {
            padding: 96px 24px;
            max-width: var(--r50ey1-max-width);
            margin: 0 auto;
        }

        .r50ey1-flex-row {
            display: flex;
            flex-wrap: wrap;
            align-items: center;
            gap: 64px;
        }

        .r50ey1-flex-col {
            flex: 1;
            min-width: 320px;
        }

        .r50ey1-img-card {
            border-radius: var(--r50ey1-radius);
            overflow: hidden;
            box-shadow: 0 20px 40px rgba(0,0,0,0.08);
        }

        .r50ey1-img-card img {
            width: 100%;
            height: auto;
            display: block;
            transition: transform 0.5s ease;
        }

        .r50ey1-img-card:hover img {
            transform: scale(1.02);
        }

        .r50ey1-badge {
            display: inline-block;
            padding: 4px 12px;
            background: var(--r50ey1-bg-soft);
            color: var(--r50ey1-primary);
            border-radius: 4px;
            font-size: 14px;
            font-weight: bold;
            margin-bottom: 16px;
        }

        /* 移动端下载区 */
        .r50ey1-section-mobile {
            background-color: var(--r50ey1-bg-soft);
            padding: 96px 24px;
        }

        .r50ey1-mobile-grid {
            max-width: var(--r50ey1-max-width);
            margin: 0 auto;
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
            gap: 48px;
            align-items: center;
        }

        .r50ey1-qr-area {
            display: flex;
            flex-wrap: wrap;
            gap: 24px;
            align-items: center;
            margin-top: 32px;
        }

        .r50ey1-qr-img {
            width: 160px;
            height: 160px;
            padding: 12px;
            background: white;
            border-radius: 12px;
            box-shadow: 0 4px 12px rgba(0,0,0,0.05);
        }

        /* 技术深度区块 */
        .r50ey1-tech-stack {
            padding: 96px 24px;
            max-width: var(--r50ey1-max-width);
            margin: 0 auto;
        }

        .r50ey1-tech-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
            gap: 32px;
        }

        .r50ey1-tech-card {
            padding: 40px;
            background: #ffffff;
            border: 1px solid #eee;
            border-radius: var(--r50ey1-radius);
            transition: all 0.3s ease;
        }

        .r50ey1-tech-card:hover {
            border-color: var(--r50ey1-primary);
            transform: translateY(-8px);
        }

        .r50ey1-tech-card h3 {
            margin-bottom: 16px;
            color: var(--r50ey1-primary);
            font-size: 24px;
        }

        /* 企业级区块 */
        .r50ey1-section-enterprise {
            padding: 96px 24px;
            background: var(--r50ey1-text-main);
            color: white;
        }

        .r50ey1-enterprise-container {
            max-width: var(--r50ey1-max-width);
            margin: 0 auto;
            display: flex;
            flex-wrap: wrap;
            flex-direction: row-reverse;
            align-items: center;
            gap: 64px;
        }

        .r50ey1-enterprise-text h2 {
            font-size: 40px;
            margin-bottom: 24px;
        }

        .r50ey1-enterprise-text p {
            color: #bdc1c6;
            margin-bottom: 32px;
        }

        /* 页脚 */
        .r50ey1-footer {
            padding: 64px 24px;
            background: #f8f9fa;
            border-top: 1px solid #eee;
        }

        .r50ey1-footer-content {
            max-width: var(--r50ey1-max-width);
            margin: 0 auto;
            display: flex;
            flex-wrap: wrap;
            justify-content: space-between;
            gap: 40px;
        }

        .r50ey1-footer-brand h2 {
            font-weight: 600;
            color: var(--r50ey1-text-sub);
            margin-bottom: 16px;
        }

        .r50ey1-footer-links {
            display: flex;
            flex-wrap: wrap;
            gap: 48px;
        }

        .r50ey1-footer-links-group h4 {
            margin-bottom: 20px;
            font-size: 14px;
            text-transform: uppercase;
            letter-spacing: 1px;
            color: var(--r50ey1-text-main);
        }

        .r50ey1-footer-links-group ul {
            list-style: none;
        }

        .r50ey1-footer-links-group li {
            margin-bottom: 12px;
        }

        .r50ey1-footer-links-group a {
            text-decoration: none;
            color: var(--r50ey1-text-sub);
            font-size: 14px;
            transition: color 0.2s ease;
        }

        .r50ey1-footer-links-group a:hover {
            color: var(--r50ey1-primary);
        }

        .r50ey1-copyright {
            max-width: var(--r50ey1-max-width);
            margin: 48px auto 0;
            padding-top: 24px;
            border-top: 1px solid #eee;
            color: #9aa0a6;
            font-size: 13px;
        }

        /* 响应式调整 */
        @media (max-width: 768px) {
            .r50ey1-nav-container {
                padding: 12px 16px;
            }
            .r50ey1-menu {
                display: none; /* 简化移动端，实际项目中会加汉堡菜单 */
            }
            .r50ey1-flex-col {
                min-width: 100%;
            }
            .r50ey1-hero h1 {
                font-size: 32px;
            }
            .r50ey1-enterprise-container {
                flex-direction: column;
            }
        }