:root { --main: #ff4500; --bg: #050505; --card: #121212; --text: #d1d1d1; }
        * { margin: 0; padding: 0; box-sizing: border-box; }
        body { font-family: "PingFang SC", "Microsoft YaHei", sans-serif; background: var(--bg); color: var(--text); line-height: 1.8; scroll-behavior: smooth; }
        .container { max-width: 1200px; margin: 0 auto; padding: 0 20px; }

        /* 顶部导航 */
        header { position: fixed; top: 0; width: 100%; height: 70px; background: rgba(0,0,0,0.9); border-bottom: 1px solid #333; z-index: 1000; display: flex; align-items: center; justify-content: center; }
        nav a { color: #fff; text-decoration: none; margin: 0 20px; font-weight: bold; font-size: 0.95rem; transition: 0.3s; }
        nav a:hover { color: var(--main); }

        /* 首页核心区布局 */
        .hero { min-height: 100vh; display: flex; align-items: center; justify-content: space-between; padding-top: 80px; gap: 40px; }
        .hero-left { flex: 1.2; }
        .hero-left h1 { font-size: 3.2rem; color: var(--main); margin-bottom: 10px; }
        .hero-left h2 { font-size: 1.8rem; color: #fff; margin-bottom: 25px; }
        
        /* 下载区域容器 */
        .dl-group { margin-top: 30px; max-width: 600px; }
        .btn-wrapper { display: flex; gap: 20px; margin-bottom: 15px; }
        .btn { flex: 1; padding: 16px 0; text-align: center; border-radius: 4px; font-weight: bold; font-size: 1.1rem; transition: all 0.3s ease; text-decoration: none; display: inline-block; }
        .btn-pc { background-color: var(--main); color: #fff; }
        .btn-mobile { border: 1px solid var(--main); color: var(--main); }
        .btn:hover { transform: translateY(-3px); box-shadow: 0 5px 15px rgba(255, 69, 0, 0.3); }

        .backup-links { color: #666; font-size: 0.9rem; text-align: center; }
        .backup-links a { color: #888; text-decoration: none; margin: 0 5px; }

        /* 滚动代码区 */
        .hero-right { flex: 0.8; }
        .code-box { background: #000; border: 1px solid #333; border-radius: 8px; padding: 20px; font-family: 'Courier New', monospace; height: 380px; overflow: hidden; color: var(--main); font-size: 0.85rem; }
        .code-anim { animation: scroll 20s linear infinite; }
        @keyframes scroll { 0% { transform: translateY(0); } 100% { transform: translateY(-60%); } }

        /* 通用样式 */
        section { padding: 90px 0; border-bottom: 1px solid #1a1a1a; }
        .title { text-align: center; margin-bottom: 60px; }
        .title h2 { font-size: 2.5rem; color: var(--main); }

        /* 核心功能区 - 三排一组 */
        .f-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; }
        .f-item { background: var(--card); padding: 30px; border-radius: 10px; border-top: 2px solid var(--main); }
        .f-item h3 { margin-bottom: 15px; color: #fff; }

        /* 运行效果区 */
        .e-row { display: flex; align-items: center; gap: 40px; margin-bottom: 60px; background: #0a0a0a; padding: 25px; border-radius: 15px; }
        .e-text { flex: 1; }
        .e-img { flex: 1.2; background: #1a1a1a; height: 300px; border-radius: 8px; display: flex; align-items: center; justify-content: center; border: 1px solid #333; }

        /* 版本对比区 */
        .v-table { width: 100%; border-collapse: collapse; background: var(--card); border-radius: 10px; overflow: hidden; }
        .v-table th, .v-table td { padding: 20px; text-align: center; border: 1px solid #222; }
        .v-table th { background: #1a1a1a; color: var(--main); }

        /* 部署指引 */
        .g-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; }
        .step { background: #111; padding: 25px; border-radius: 8px; text-align: center; }

        /* 手机端适配 */
        @media (max-width: 768px) {
            header { display: none; }
            .hero { flex-direction: column; text-align: center; padding-top: 40px; }
            .btn-wrapper { flex-direction: column; gap: 12px; }
            .f-grid, .g-grid { grid-template-columns: 1fr; }
            .e-row { flex-direction: column; }
            .e-img { width: 100%; height: 200px; }
            .v-table { font-size: 0.8rem; }
        }