:root {
            --r50ey1-primary: #FBBC04;
            --r50ey1-error: #EA4335;
            --r50ey1-bg: #0f1113;
            --r50ey1-surface: #1e2124;
            --r50ey1-text: #e8eaed;
            --r50ey1-text-dim: #9aa0a6;
            --r50ey1-accent-glow: rgba(251, 188, 4, 0.15);
            --r50ey1-max-width: 1100px;
        }

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

        body {
            font-family: 'Segoe UI', Roboto, Helvetica, Arial, sans-serif;
            background-color: var(--r50ey1-bg);
            color: var(--r50ey1-text);
            line-height: 1.7;
            word-break: keep-all;
            overflow-x: hidden;
        }

        /* 导航系统 */
        .r50ey1-header {
            position: fixed;
            top: 0;
            width: 100%;
            background: rgba(15, 17, 19, 0.9);
            backdrop-filter: blur(12px);
            z-index: 1000;
            border-bottom: 1px solid rgba(255, 255, 255, 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: 0 24px;
            min-height: 72px;
        }

        .r50ey1-logo {
            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: 16px;
            min-width: 0;
        }

        .r50ey1-nav-link {
            text-decoration: none;
            color: var(--r50ey1-text-dim);
            font-size: 0.95rem;
            font-weight: 500;
            transition: color 0.3s ease;
            padding: 8px 12px;
            border-radius: 6px;
        }

        .r50ey1-nav-link:hover {
            color: var(--r50ey1-primary);
            background: rgba(251, 188, 4, 0.05);
        }

        .r50ey1-nav-link.active {
            color: var(--r50ey1-primary);
            background: rgba(251, 188, 4, 0.1);
        }

        /* Hero 视觉区 */
        .r50ey1-hero {
            padding: 160px 24px 80px;
            text-align: center;
            background: radial-gradient(circle at center, var(--r50ey1-accent-glow) 0%, transparent 70%);
        }

        .r50ey1-hero-title {
            font-size: clamp(2.5rem, 5vw + 1rem, 4.5rem);
            line-height: 1.1;
            margin-bottom: 24px;
            color: #fff;
            word-break: break-word;
        }

        .r50ey1-hero-subtitle {
            font-size: clamp(1rem, 2vw + 0.5rem, 1.4rem);
            color: var(--r50ey1-text-dim);
            max-width: 800px;
            margin: 0 auto 48px;
            word-break: break-word;
        }

        /* 快捷键展示区 */
        .r50ey1-shortcut-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
            gap: 32px;
            max-width: var(--r50ey1-max-width);
            margin: 0 auto 80px;
            padding: 0 24px;
        }

        .r50ey1-key-card {
            background: var(--r50ey1-surface);
            padding: 48px 32px;
            border-radius: 24px;
            border: 1px solid rgba(255, 255, 255, 0.05);
            text-align: center;
            transition: transform 0.4s cubic-bezier(0.175, 0.885, 0.32, 1.275);
            min-width: 0;
        }

        .r50ey1-key-card:hover {
            transform: translateY(-10px);
            border-color: var(--r50ey1-primary);
        }

        .r50ey1-key-label {
            color: var(--r50ey1-primary);
            text-transform: uppercase;
            letter-spacing: 2px;
            font-size: 0.85rem;
            margin-bottom: 16px;
            display: block;
        }

        .r50ey1-key-combo {
            display: flex;
            flex-wrap: wrap;
            justify-content: center;
            align-items: center;
            gap: 12px;
            margin-bottom: 24px;
        }

        .r50ey1-kbd {
            background: #2d3135;
            padding: 12px 20px;
            border-radius: 12px;
            border-bottom: 4px solid #16181a;
            font-family: 'Courier New', monospace;
            font-weight: bold;
            font-size: 1.5rem;
            color: #fff;
            min-width: 60px;
        }

        /* 核心技术栈 */
        .r50ey1-tech-section {
            background: #080808;
            padding: 96px 24px;
        }

        .r50ey1-section-inner {
            max-width: var(--r50ey1-max-width);
            margin: 0 auto;
        }

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

        .r50ey1-tech-item {
            flex: 1;
            min-width: 300px;
            word-break: break-word;
        }

        .r50ey1-tech-tag {
            display: inline-block;
            background: rgba(251, 188, 4, 0.1);
            color: var(--r50ey1-primary);
            padding: 4px 12px;
            border-radius: 4px;
            font-size: 0.8rem;
            margin-bottom: 16px;
        }

        .r50ey1-tech-title {
            font-size: 1.8rem;
            margin-bottom: 16px;
            color: #fff;
        }

        /* 生产力生态 */
        .r50ey1-eco-section {
            padding: 96px 24px;
        }

        .r50ey1-eco-card {
            background: linear-gradient(145deg, #1e2124 0%, #151719 100%);
            padding: 40px;
            border-radius: 32px;
            margin-bottom: 32px;
            display: flex;
            flex-wrap: wrap;
            gap: 40px;
            align-items: center;
            border: 1px solid rgba(255, 255, 255, 0.03);
            min-width: 0;
        }

        .r50ey1-eco-content {
            flex: 1;
            min-width: 280px;
        }

        .r50ey1-capability-list {
            list-style: none;
            margin-top: 24px;
        }

        .r50ey1-capability-item {
            padding: 12px 0;
            border-top: 1px solid rgba(255, 255, 255, 0.05);
            display: flex;
            gap: 12px;
            color: var(--r50ey1-text-dim);
        }

        .r50ey1-capability-item::before {
            content: "•";
            color: var(--r50ey1-primary);
            font-weight: bold;
        }

        /* 未来愿景 */
        .r50ey1-vision-grid {
            display: flex;
            flex-wrap: wrap;
            gap: 24px;
            margin-top: 48px;
        }

        .r50ey1-vision-node {
            flex: 1;
            min-width: 260px;
            background: #1a1c1e;
            padding: 32px;
            border-radius: 16px;
            border-left: 4px solid var(--r50ey1-primary);
        }

        /* 页脚 */
        .r50ey1-footer {
            background: #050505;
            padding: 80px 24px 40px;
            margin-top: 96px;
            border-top: 1px solid rgba(255, 255, 255, 0.05);
        }

        .r50ey1-footer-grid {
            max-width: var(--r50ey1-max-width);
            margin: 0 auto;
            display: flex;
            flex-wrap: wrap;
            justify-content: space-between;
            gap: 48px;
        }

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

        .r50ey1-brand-name {
            font-size: 1.5rem;
            font-weight: bold;
            margin-bottom: 16px;
            color: #fff;
        }

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

        .r50ey1-link-group h4 {
            color: var(--r50ey1-primary);
            margin-bottom: 20px;
            font-size: 0.9rem;
            text-transform: uppercase;
        }

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

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

        .r50ey1-footer-list a {
            color: var(--r50ey1-text-dim);
            text-decoration: none;
            transition: color 0.3s;
        }

        .r50ey1-footer-list a:hover {
            color: #fff;
        }

        .r50ey1-copyright {
            text-align: center;
            margin-top: 64px;
            padding-top: 24px;
            border-top: 1px solid rgba(255, 255, 255, 0.05);
            color: var(--r50ey1-text-dim);
            font-size: 0.85rem;
        }

        /* 响应式调整 */
        @media (max-width: 768px) {
            .r50ey1-nav-menu {
                display: none; /* 简化移动端，实际项目中会加汉堡菜单 */
            }
            .r50ey1-hero {
                padding: 120px 24px 60px;
            }
            .r50ey1-tech-item, .r50ey1-eco-content, .r50ey1-vision-node {
                flex: 1 1 100%;
            }
        }