:root {
            --r50ey1-primary: #4285F4;
            --r50ey1-success: #34A853;
            --r50ey1-accent: #FBBC04;
            --r50ey1-error: #EA4335;
            --r50ey1-text: #202124;
            --r50ey1-text-light: #5f6368;
            --r50ey1-bg: #ffffff;
            --r50ey1-bg-alt: #f8f9fa;
            --r50ey1-container-width: 1300px;
            --r50ey1-transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
        }

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

        body {
            font-family: 'Segoe UI', Roboto, Helvetica, Arial, sans-serif;
            color: var(--r50ey1-text);
            line-height: 1.6;
            background-color: var(--r50ey1-bg);
            word-break: keep-all;
            overflow-x: hidden;
        }

        /* 布局基础 */
        .r50ey1-container {
            max-width: var(--r50ey1-container-width);
            margin: 0 auto;
            padding: 0 24px;
            width: 100%;
        }

        .r50ey1-flex {
            display: flex;
            flex-wrap: wrap;
        }

        .r50ey1-flex-item {
            min-width: 0;
        }

        .r50ey1-section {
            padding: 80px 0;
            word-break: break-word;
            overflow-wrap: break-word;
        }

        /* 导航栏 */
        .r50ey1-header {
            position: sticky;
            top: 0;
            z-index: 1000;
            background: rgba(255, 255, 255, 0.9);
            backdrop-filter: blur(10px);
            border-bottom: 1px solid #e0e0e0;
            padding: 12px 0;
        }

        .r50ey1-nav-wrapper {
            display: flex;
            flex-wrap: wrap;
            justify-content: space-between;
            align-items: center;
        }

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

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

        .r50ey1-nav {
            display: flex;
            flex-wrap: wrap;
            list-style: none;
            gap: 20px;
        }

        .r50ey1-nav-link {
            text-decoration: none;
            color: var(--r50ey1-text-light);
            font-size: 15px;
            font-weight: 500;
            padding: 8px 4px;
            transition: var(--r50ey1-transition);
            border-bottom: 2px solid transparent;
        }

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

        .r50ey1-nav-link.active {
            color: var(--r50ey1-primary);
            border-bottom-color: var(--r50ey1-primary);
        }

        /* Hero 区 - 独特对角线布局 */
        .r50ey1-hero {
            position: relative;
            background: linear-gradient(135deg, #f1f3f4 50%, #ffffff 50%);
            padding: 120px 0;
            overflow: hidden;
        }

        .r50ey1-hero-content {
            max-width: 700px;
        }

        .r50ey1-hero-title {
            font-size: clamp(2.5rem, 5vw + 1rem, 4.5rem);
            line-height: 1.1;
            font-weight: 800;
            color: var(--r50ey1-text);
            margin-bottom: 24px;
        }

        .r50ey1-hero-subtitle {
            font-size: clamp(1.1rem, 2vw + 0.5rem, 1.4rem);
            color: var(--r50ey1-text-light);
            margin-bottom: 40px;
            max-width: 600px;
        }

        .r50ey1-btn-group {
            display: flex;
            flex-wrap: wrap;
            gap: 16px;
        }

        .r50ey1-btn {
            display: inline-flex;
            align-items: center;
            padding: 16px 32px;
            border-radius: 50px;
            font-weight: 600;
            text-decoration: none;
            transition: var(--r50ey1-transition);
            cursor: pointer;
            border: none;
        }

        .r50ey1-btn-primary {
            background-color: var(--r50ey1-primary);
            color: white;
            box-shadow: 0 4px 14px rgba(66, 133, 244, 0.4);
        }

        .r50ey1-btn-primary:hover {
            transform: translateY(-2px);
            box-shadow: 0 6px 20px rgba(66, 133, 244, 0.6);
        }

        .r50ey1-btn-outline {
            background-color: transparent;
            border: 2px solid var(--r50ey1-text);
            color: var(--r50ey1-text);
        }

        .r50ey1-btn-outline:hover {
            background-color: var(--r50ey1-text);
            color: white;
        }

        /* 核心技术展示 - 3列网格 */
        .r50ey1-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
            gap: 32px;
            margin-top: 48px;
        }

        .r50ey1-card {
            background: var(--r50ey1-bg);
            padding: 40px;
            border-radius: 24px;
            border: 1px solid #f1f3f4;
            transition: var(--r50ey1-transition);
            display: flex;
            flex-direction: column;
        }

        .r50ey1-card:hover {
            box-shadow: 0 20px 40px rgba(0,0,0,0.08);
            transform: translateY(-8px);
        }

        .r50ey1-card-icon {
            width: 56px;
            height: 56px;
            border-radius: 12px;
            background: var(--r50ey1-bg-alt);
            margin-bottom: 24px;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 24px;
        }

        .r50ey1-card-title {
            font-size: 22px;
            margin-bottom: 16px;
            color: var(--r50ey1-text);
        }

        .r50ey1-card-desc {
            color: var(--r50ey1-text-light);
            font-size: 16px;
            line-height: 1.7;
        }

        /* 安装流程区块 - 左右分栏 */
        .r50ey1-split-section {
            background: #202124;
            color: white;
            border-radius: 40px;
            margin: 40px 24px;
            overflow: hidden;
        }

        .r50ey1-split-content {
            padding: 80px;
            flex: 1;
        }

        .r50ey1-split-visual {
            flex: 1;
            background: var(--r50ey1-accent);
            display: flex;
            align-items: center;
            justify-content: center;
            min-height: 400px;
            position: relative;
        }

        .r50ey1-install-step {
            margin-bottom: 32px;
            position: relative;
            padding-left: 48px;
        }

        .r50ey1-step-num {
            position: absolute;
            left: 0;
            top: 0;
            width: 32px;
            height: 32px;
            background: var(--r50ey1-primary);
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            font-weight: bold;
        }

        /* 生产力生态 */
        .r50ey1-feature-row {
            margin-top: 64px;
            gap: 48px;
            align-items: center;
        }

        .r50ey1-feature-text {
            flex: 1;
            min-width: 300px;
        }

        .r50ey1-feature-visual {
            flex: 1;
            min-width: 300px;
            background: var(--r50ey1-bg-alt);
            border-radius: 32px;
            padding: 40px;
        }

        .r50ey1-tag-list {
            display: flex;
            flex-wrap: wrap;
            gap: 12px;
            margin-top: 24px;
        }

        .r50ey1-tag {
            background: #e8f0fe;
            color: var(--r50ey1-primary);
            padding: 6px 16px;
            border-radius: 20px;
            font-size: 14px;
            font-weight: 500;
        }

        /* 未来愿景区块 */
        .r50ey1-vision-section {
            text-align: center;
            background: radial-gradient(circle at top right, #fffdf0, #ffffff);
        }

        .r50ey1-milestone-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 1px;
            background: #e0e0e0;
            margin-top: 64px;
            border-radius: 16px;
            overflow: hidden;
        }

        .r50ey1-milestone {
            background: white;
            padding: 48px 32px;
        }

        .r50ey1-milestone-period {
            font-weight: 800;
            color: var(--r50ey1-accent);
            text-transform: uppercase;
            letter-spacing: 2px;
            margin-bottom: 16px;
            display: block;
        }

        /* 页脚 */
        .r50ey1-footer {
            background: var(--r50ey1-bg-alt);
            padding: 80px 0 40px;
            border-top: 1px solid #e0e0e0;
        }

        .r50ey1-footer-grid {
            display: grid;
            grid-template-columns: 2fr repeat(3, 1fr);
            gap: 48px;
            margin-bottom: 64px;
        }

        .r50ey1-footer-brand {
            font-size: 24px;
            font-weight: 700;
            margin-bottom: 24px;
        }

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

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

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

        .r50ey1-footer-links a {
            text-decoration: none;
            color: var(--r50ey1-text-light);
            transition: var(--r50ey1-transition);
        }

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

        .r50ey1-copyright {
            text-align: center;
            padding-top: 40px;
            border-top: 1px solid #e0e0e0;
            color: var(--r50ey1-text-light);
            font-size: 14px;
        }

        /* 响应式适配 */
        @media (max-width: 992px) {
            .r50ey1-milestone-grid {
                grid-template-columns: 1fr;
            }
            .r50ey1-footer-grid {
                grid-template-columns: 1fr 1fr;
            }
        }

        @media (max-width: 768px) {
            .r50ey1-header {
                padding: 16px 0;
            }
            .r50ey1-nav {
                display: none; /* 简化移动端，实际项目中应有汉堡菜单 */
            }
            .r50ey1-split-section {
                flex-direction: column;
                margin: 20px 16px;
            }
            .r50ey1-split-content {
                padding: 40px 24px;
            }
            .r50ey1-hero {
                padding: 60px 0;
                text-align: center;
            }
            .r50ey1-btn-group {
                justify-content: center;
            }
            .r50ey1-footer-grid {
                grid-template-columns: 1fr;
            }
        }