:root {
            --r50ey1-primary: #4285F4;
            --r50ey1-success: #34A853;
            --r50ey1-accent: #FBBC04;
            --r50ey1-error: #EA4335;
            --r50ey1-text-main: #202124;
            --r50ey1-text-sub: #5f6368;
            --r50ey1-bg-light: #f8f9fa;
            --r50ey1-white: #ffffff;
            --r50ey1-spacing-unit: 8px;
            --r50ey1-radius: 16px;
            --r50ey1-shadow: 0 4px 20px rgba(0, 0, 0, 0.05);
        }

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

        body {
            font-family: "Segoe UI", Roboto, Helvetica, Arial, sans-serif, "Apple Color Emoji", "Segoe UI Emoji";
            background-color: var(--r50ey1-white);
            color: var(--r50ey1-text-main);
            line-height: 1.6;
            overflow-x: hidden;
        }

        /* 布局容器 */
        .r50ey1-container {
            max-width: 1100px;
            margin: 0 auto;
            padding: 0 calc(var(--r50ey1-spacing-unit) * 3);
            width: 100%;
        }

        /* 导航栏 */
        .r50ey1-header {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            background: rgba(255, 255, 255, 0.9);
            backdrop-filter: blur(10px);
            z-index: 1000;
            border-bottom: 1px solid rgba(0, 0, 0, 0.05);
            transition: all 0.3s ease;
        }

        .r50ey1-nav-wrapper {
            display: flex;
            flex-wrap: wrap;
            align-items: center;
            justify-content: space-between;
            height: 72px;
            min-width: 0;
        }

        .r50ey1-logo {
            flex-shrink: 0;
            display: flex;
            align-items: center;
            min-width: 0;
        }

        .r50ey1-logo img {
            height: 32px;
            width: auto;
        }

        .r50ey1-nav-menu {
            display: flex;
            flex-wrap: wrap;
            list-style: none;
            gap: calc(var(--r50ey1-spacing-unit) * 3);
            min-width: 0;
        }

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

        .r50ey1-nav-menu a {
            text-decoration: none;
            color: var(--r50ey1-text-sub);
            font-size: 14px;
            font-weight: 500;
            transition: color 0.3s ease;
            white-space: nowrap;
        }

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

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

        .r50ey1-nav-menu a.active::after {
            content: '';
            position: absolute;
            bottom: -8px;
            left: 0;
            width: 100%;
            height: 2px;
            background: var(--r50ey1-primary);
        }

        /* Hero 区块 - 独特非对称布局 */
        .r50ey1-hero {
            padding-top: 160px;
            padding-bottom: 96px;
            background: radial-gradient(circle at 90% 10%, rgba(66, 133, 244, 0.05) 0%, transparent 40%);
        }

        .r50ey1-hero-grid {
            display: flex;
            flex-wrap: wrap;
            align-items: center;
            gap: 48px;
            min-width: 0;
        }

        .r50ey1-hero-content {
            flex: 1;
            min-width: 320px;
            word-break: break-word;
            overflow-wrap: break-word;
        }

        .r50ey1-hero-tag {
            display: inline-block;
            padding: 4px 12px;
            background: rgba(251, 188, 4, 0.15);
            color: #b08100;
            border-radius: 20px;
            font-size: 14px;
            font-weight: 600;
            margin-bottom: 24px;
        }

        .r50ey1-hero-title {
            font-size: clamp(2.5rem, 5vw + 1rem, 4rem);
            line-height: 1.1;
            font-weight: 800;
            margin-bottom: 24px;
            color: var(--r50ey1-text-main);
            letter-spacing: -1px;
        }

        .r50ey1-hero-subtitle {
            font-size: clamp(1.1rem, 1vw + 0.8rem, 1.3rem);
            color: var(--r50ey1-text-sub);
            margin-bottom: 40px;
            max-width: 600px;
            line-height: 1.7;
        }

        .r50ey1-hero-visual {
            flex: 1;
            min-width: 320px;
            position: relative;
            display: flex;
            justify-content: center;
        }

        /* 纯CSS设计的同步动效图 */
        .r50ey1-sync-orbit {
            width: 300px;
            height: 300px;
            border: 2px dashed rgba(66, 133, 244, 0.2);
            border-radius: 50%;
            position: relative;
            animation: r50ey1-rotate 20s linear infinite;
        }

        @keyframes r50ey1-rotate {
            from { transform: rotate(0deg); }
            to { transform: rotate(360deg); }
        }

        .r50ey1-sync-node {
            position: absolute;
            width: 60px;
            height: 60px;
            background: var(--r50ey1-white);
            border-radius: 12px;
            box-shadow: var(--r50ey1-shadow);
            display: flex;
            align-items: center;
            justify-content: center;
            font-weight: bold;
            color: var(--r50ey1-primary);
        }

        .r50ey1-node-1 { top: -30px; left: 120px; }
        .r50ey1-node-2 { bottom: -30px; left: 120px; }
        .r50ey1-node-3 { left: -30px; top: 120px; }
        .r50ey1-node-4 { right: -30px; top: 120px; }

        /* 功能卡片区 */
        .r50ey1-section {
            padding: 96px 0;
            min-width: 0;
        }

        .r50ey1-section-title {
            text-align: center;
            font-size: clamp(1.8rem, 3vw + 0.5rem, 2.5rem);
            margin-bottom: 64px;
            word-break: keep-all;
        }

        .r50ey1-features-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
            gap: 32px;
            min-width: 0;
        }

        .r50ey1-card {
            background: var(--r50ey1-bg-light);
            padding: 40px;
            border-radius: var(--r50ey1-radius);
            transition: transform 0.3s ease, box-shadow 0.3s ease;
            border: 1px solid transparent;
            min-width: 0;
            word-break: break-word;
        }

        .r50ey1-card:hover {
            transform: translateY(-8px);
            background: var(--r50ey1-white);
            box-shadow: 0 20px 40px rgba(0,0,0,0.08);
            border-color: rgba(66, 133, 244, 0.1);
        }

        .r50ey1-card-icon {
            width: 48px;
            height: 48px;
            background: var(--r50ey1-white);
            border-radius: 12px;
            display: flex;
            align-items: center;
            justify-content: center;
            margin-bottom: 24px;
            font-size: 24px;
            box-shadow: 0 4px 10px rgba(0,0,0,0.05);
        }

        .r50ey1-card h3 {
            font-size: 20px;
            margin-bottom: 16px;
            color: var(--r50ey1-text-main);
        }

        .r50ey1-card p {
            color: var(--r50ey1-text-sub);
            font-size: 16px;
            line-height: 1.8;
        }

        /* 架构深度展示区 */
        .r50ey1-tech-stack {
            background: var(--r50ey1-text-main);
            color: var(--r50ey1-white);
            border-radius: 32px;
            padding: 64px;
            margin: 48px 0;
            min-width: 0;
        }

        .r50ey1-tech-item {
            display: flex;
            flex-wrap: wrap;
            gap: 24px;
            margin-bottom: 48px;
            padding-bottom: 32px;
            border-bottom: 1px solid rgba(255, 255, 255, 0.1);
            min-width: 0;
        }

        .r50ey1-tech-item:last-child {
            border-bottom: none;
            margin-bottom: 0;
        }

        .r50ey1-tech-label {
            flex: 0 0 200px;
            font-weight: 700;
            color: var(--r50ey1-accent);
            font-size: 18px;
            min-width: 0;
        }

        .r50ey1-tech-desc {
            flex: 1;
            min-width: 280px;
            word-break: break-word;
        }

        /* 未来展望 - 独特时间轴布局 */
        .r50ey1-timeline {
            display: flex;
            flex-wrap: wrap;
            gap: 24px;
            justify-content: center;
            min-width: 0;
        }

        .r50ey1-timeline-node {
            flex: 1;
            min-width: 260px;
            padding: 32px;
            background: var(--r50ey1-bg-light);
            border-radius: var(--r50ey1-radius);
            position: relative;
            text-align: center;
        }

        .r50ey1-timeline-node::before {
            content: '';
            width: 40px;
            height: 4px;
            background: var(--r50ey1-primary);
            display: block;
            margin: 0 auto 16px;
            border-radius: 2px;
        }

        .r50ey1-timeline-period {
            font-weight: 800;
            color: var(--r50ey1-primary);
            margin-bottom: 8px;
            display: block;
        }

        /* 页脚 */
        .r50ey1-footer {
            background: var(--r50ey1-bg-light);
            padding: 80px 0 40px;
            margin-top: 96px;
            border-top: 1px solid rgba(0,0,0,0.05);
        }

        .r50ey1-footer-content {
            display: flex;
            flex-wrap: wrap;
            justify-content: space-between;
            gap: 48px;
            min-width: 0;
        }

        .r50ey1-footer-brand {
            flex: 1;
            min-width: 240px;
        }

        .r50ey1-footer-brand h2 {
            font-size: 24px;
            margin-bottom: 16px;
            color: var(--r50ey1-text-main);
        }

        .r50ey1-footer-links {
            display: flex;
            flex-wrap: wrap;
            gap: 48px;
            min-width: 0;
        }

        .r50ey1-footer-group h4 {
            margin-bottom: 24px;
            font-size: 16px;
        }

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

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

        .r50ey1-footer-group a {
            text-decoration: none;
            color: var(--r50ey1-text-sub);
            font-size: 14px;
            transition: color 0.3s;
        }

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

        .r50ey1-footer-bottom {
            margin-top: 64px;
            padding-top: 32px;
            border-top: 1px solid rgba(0,0,0,0.05);
            text-align: center;
            font-size: 13px;
            color: var(--r50ey1-text-sub);
        }

        /* 移动端适配 */
        @media (max-width: 768px) {
            .r50ey1-nav-menu {
                display: none; /* 简化演示，实际可做汉堡菜单 */
            }
            .r50ey1-hero {
                padding-top: 120px;
                text-align: center;
            }
            .r50ey1-hero-grid {
                flex-direction: column;
            }
            .r50ey1-tech-stack {
                padding: 32px;
            }
            .r50ey1-tech-label {
                flex: 1 0 100%;
            }
        }

        /* 交互增强 */
        .r50ey1-btn {
            display: inline-block;
            padding: 16px 32px;
            background: var(--r50ey1-primary);
            color: var(--r50ey1-white);
            text-decoration: none;
            border-radius: 30px;
            font-weight: 600;
            transition: all 0.3s ease;
            box-shadow: 0 8px 15px rgba(66, 133, 244, 0.25);
        }

        .r50ey1-btn:hover {
            transform: translateY(-3px);
            box-shadow: 0 12px 20px rgba(66, 133, 244, 0.35);
            background: #3367d6;
        }