:root {
            --r50ey1-primary-blue: #4285F4;
            --r50ey1-primary-red: #EA4335;
            --r50ey1-primary-green: #34A853;
            --r50ey1-primary-yellow: #FBBC04;
            --r50ey1-bg-light: #F8F9FA;
            --r50ey1-text-dark: #202124;
            --r50ey1-text-muted: #5F6368;
            --r50ey1-lab-accent: #FBBC04;
            --r50ey1-card-shadow: 0 4px 20px rgba(0,0,0,0.08);
            --r50ey1-border-radius: 16px;
        }

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

        body {
            font-family: "Segoe UI", Roboto, Helvetica, Arial, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
            background-color: var(--r50ey1-bg-light);
            color: var(--r50ey1-text-dark);
            line-height: 1.6;
            overflow-x: hidden;
        }

        /* 布局容器 */
        .r50ey1-container {
            max-width: 1100px;
            margin: 0 auto;
            padding: 0 24px;
            width: 100%;
        }

        /* 导航栏 */
        .r50ey1-nav-wrapper {
            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);
        }

        .r50ey1-nav-container {
            max-width: 1400px;
            margin: 0 auto;
            display: flex;
            justify-content: space-between;
            align-items: center;
            padding: 12px 24px;
            flex-wrap: wrap;
        }

        .r50ey1-logo {
            flex-shrink: 0;
            min-width: 0;
        }

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

        .r50ey1-menu {
            display: flex;
            list-style: none;
            flex-wrap: wrap;
            gap: 8px;
            min-width: 0;
        }

        .r50ey1-menu li a {
            text-decoration: none;
            color: var(--r50ey1-text-muted);
            font-size: 14px;
            font-weight: 500;
            padding: 8px 16px;
            border-radius: 20px;
            transition: all 0.3s ease;
            white-space: nowrap;
        }

        .r50ey1-menu li a:hover {
            background-color: rgba(0,0,0,0.04);
            color: var(--r50ey1-text-dark);
        }

        .r50ey1-menu li a.active {
            background-color: var(--r50ey1-primary-blue);
            color: #fff;
        }

        /* Hero 区块 - 独特对角线分割设计 */
        .r50ey1-hero {
            padding: 160px 0 100px;
            background: linear-gradient(135deg, #fff 0%, #f1f3f4 100%);
            position: relative;
            overflow: hidden;
            text-align: center;
        }

        .r50ey1-hero::before {
            content: "";
            position: absolute;
            top: -50%;
            right: -10%;
            width: 60%;
            height: 200%;
            background: rgba(251, 188, 4, 0.05);
            transform: rotate(15deg);
            z-index: 0;
        }

        .r50ey1-hero-content {
            position: relative;
            z-index: 1;
            max-width: 800px;
            margin: 0 auto;
            word-break: break-word;
        }

        .r50ey1-hero-tag {
            display: inline-block;
            background: var(--r50ey1-primary-yellow);
            color: var(--r50ey1-text-dark);
            padding: 4px 12px;
            border-radius: 4px;
            font-weight: bold;
            font-size: 12px;
            margin-bottom: 24px;
            letter-spacing: 1px;
        }

        .r50ey1-hero h1 {
            font-size: clamp(2rem, 5vw + 1rem, 3.5rem);
            font-weight: 800;
            line-height: 1.1;
            margin-bottom: 24px;
            color: var(--r50ey1-text-dark);
            word-break: keep-all;
        }

        .r50ey1-hero p {
            font-size: clamp(1rem, 2vw + 0.5rem, 1.25rem);
            color: var(--r50ey1-text-muted);
            max-width: 600px;
            margin: 0 auto 40px;
        }

        /* 实验功能列表 */
        .r50ey1-flags-section {
            padding: 80px 0;
        }

        .r50ey1-section-header {
            margin-bottom: 48px;
            display: flex;
            justify-content: space-between;
            align-items: flex-end;
            flex-wrap: wrap;
            gap: 24px;
        }

        .r50ey1-section-title h2 {
            font-size: 32px;
            margin-bottom: 8px;
        }

        .r50ey1-flag-grid {
            display: grid;
            grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
            gap: 24px;
        }

        .r50ey1-flag-card {
            background: #fff;
            border-radius: var(--r50ey1-border-radius);
            padding: 32px;
            border: 1px solid rgba(0,0,0,0.05);
            transition: transform 0.3s ease, box-shadow 0.3s ease;
            display: flex;
            flex-direction: column;
            min-width: 0;
            word-break: break-word;
        }

        .r50ey1-flag-card:hover {
            transform: translateY(-8px);
            box-shadow: var(--r50ey1-card-shadow);
        }

        .r50ey1-flag-status {
            font-size: 12px;
            font-weight: bold;
            color: var(--r50ey1-primary-blue);
            text-transform: uppercase;
            margin-bottom: 12px;
            display: flex;
            align-items: center;
            gap: 6px;
        }

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

        .r50ey1-flag-card ul {
            list-style: none;
            margin-bottom: 24px;
            flex-grow: 1;
        }

        .r50ey1-flag-card li {
            font-size: 14px;
            color: var(--r50ey1-text-muted);
            margin-bottom: 8px;
            padding-left: 18px;
            position: relative;
        }

        .r50ey1-flag-card li::before {
            content: "•";
            position: absolute;
            left: 0;
            color: var(--r50ey1-primary-yellow);
        }

        .r50ey1-btn-inline {
            align-self: flex-start;
            color: var(--r50ey1-primary-blue);
            text-decoration: none;
            font-weight: 600;
            font-size: 14px;
            border-bottom: 2px solid transparent;
            transition: border-color 0.3s;
        }

        .r50ey1-btn-inline:hover {
            border-color: var(--r50ey1-primary-blue);
        }

        /* 架构技术区块 */
        .r50ey1-tech-stack {
            background-color: var(--r50ey1-text-dark);
            color: #fff;
            padding: 96px 0;
            border-radius: 40px;
            margin: 40px 24px;
        }

        .r50ey1-tech-grid {
            display: flex;
            flex-wrap: wrap;
            gap: 48px;
            margin-top: 64px;
        }

        .r50ey1-tech-item {
            flex: 1;
            min-width: 280px;
        }

        .r50ey1-tech-item h4 {
            color: var(--r50ey1-primary-yellow);
            font-size: 14px;
            text-transform: uppercase;
            letter-spacing: 2px;
            margin-bottom: 16px;
        }

        .r50ey1-tech-item h3 {
            font-size: 24px;
            margin-bottom: 16px;
        }

        .r50ey1-tech-item p {
            color: #9aa0a6;
            font-size: 15px;
            line-height: 1.8;
        }

        .r50ey1-performance-tag {
            display: inline-block;
            margin-top: 16px;
            padding: 2px 10px;
            background: rgba(255,255,255,0.1);
            border-radius: 4px;
            font-size: 12px;
        }

        /* 路线图区块 */
        .r50ey1-roadmap {
            padding: 96px 0;
        }

        .r50ey1-timeline {
            display: flex;
            flex-wrap: wrap;
            gap: 0;
            margin-top: 48px;
            border-left: 2px solid #e8eaed;
            padding-left: 32px;
        }

        .r50ey1-timeline-step {
            width: 100%;
            margin-bottom: 48px;
            position: relative;
        }

        .r50ey1-timeline-step::before {
            content: "";
            position: absolute;
            left: -41px;
            top: 0;
            width: 16px;
            height: 16px;
            background: #fff;
            border: 4px solid var(--r50ey1-primary-blue);
            border-radius: 50%;
        }

        .r50ey1-timeline-period {
            font-weight: 700;
            color: var(--r50ey1-primary-blue);
            margin-bottom: 8px;
        }

        .r50ey1-timeline-content h3 {
            font-size: 22px;
            margin-bottom: 12px;
        }

        /* 动态内容区块 */
        .r50ey1-news-section {
            padding: 80px 0;
            background: #fff;
        }

        /* 页脚 */
        .r50ey1-footer {
            background: #f1f3f4;
            padding: 80px 0 40px;
            margin-top: 80px;
        }

        .r50ey1-footer-grid {
            display: flex;
            flex-wrap: wrap;
            justify-content: space-between;
            gap: 48px;
            margin-bottom: 64px;
        }

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

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

        .r50ey1-footer-links {
            display: flex;
            flex-wrap: wrap;
            gap: 64px;
        }

        .r50ey1-footer-col h4 {
            margin-bottom: 24px;
            font-size: 14px;
            color: var(--r50ey1-text-dark);
        }

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

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

        .r50ey1-footer-col ul li a {
            text-decoration: none;
            color: var(--r50ey1-text-muted);
            font-size: 14px;
            transition: color 0.3s;
        }

        .r50ey1-footer-col ul li a:hover {
            color: var(--r50ey1-primary-blue);
        }

        .r50ey1-footer-bottom {
            border-top: 1px solid #dadce0;
            padding-top: 32px;
            display: flex;
            justify-content: space-between;
            flex-wrap: wrap;
            gap: 24px;
            font-size: 12px;
            color: var(--r50ey1-text-muted);
        }

        /* 响应式调整 */
        @media (max-width: 768px) {
            .r50ey1-nav-container {
                padding: 12px 16px;
            }
            .r50ey1-menu {
                display: none; /* 简化移动端处理 */
            }
            .r50ey1-hero h1 {
                font-size: 32px;
            }
            .r50ey1-tech-stack {
                margin: 20px 12px;
                padding: 48px 24px;
            }
        }