:root {
            --primary: #ff3131; /* 战术红 */
            --secondary: #ff9900; /* 警告橙 */
            --bg-body: #050505;
            --bg-card: #121212;
            --text-main: #ffffff;
            --text-dim: #a0a0a0;
            --accent: #00ff41; /* 黑客绿 */
        }

        * { margin: 0; padding: 0; box-sizing: border-box; font-family: 'Segoe UI', "Microsoft YaHei", sans-serif; }
        body { background-color: var(--bg-body); color: var(--text-main); line-height: 1.6; }
        a { text-decoration: none; transition: 0.3s; }
        li { list-style: none; }

        /* --- 导航栏 --- */
        header {
            position: fixed; top: 0; width: 100%; background: rgba(0,0,0,0.9);
            border-bottom: 1px solid #333; z-index: 1000; backdrop-filter: blur(5px);
        }
        nav {
            max-width: 1200px; margin: 0 auto; display: flex;
            justify-content: space-between; align-items: center; padding: 15px 20px;
        }
        .logo { font-size: 22px; font-weight: 900; color: var(--primary); letter-spacing: 1px; }
        .nav-menu { display: flex; gap: 20px; }
        .nav-menu a { color: #ccc; font-size: 14px; font-weight: bold; }
        .nav-menu a:hover { color: var(--primary); }

        /* --- 首页 Hero 区 --- */
        .hero {
            padding: 140px 20px 80px; max-width: 1200px; margin: 0 auto;
            display: flex; align-items: center; gap: 40px; min-height: 80vh;
        }
        .hero-content { flex: 1.2; }
        .hero-title { font-size: clamp(32px, 5vw, 56px); line-height: 1.1; margin-bottom: 20px; }
        .hero-title span { color: var(--primary); }
        .hero-desc { font-size: 18px; color: var(--text-dim); margin-bottom: 30px; }
        .hero-tags { font-size: 13px; color: #666; margin-bottom: 20px; }
        
        /* 核心按钮组 */
        .action-btns { display: flex; gap: 15px; margin-bottom: 25px; }
        .btn {
            flex: 1; padding: 18px 30px; border-radius: 8px; text-align: center;
            font-size: 18px; font-weight: bold; cursor: pointer; border: none;
        }
        .btn-buy { background: var(--primary); color: white; box-shadow: 0 5px 15px rgba(255, 49, 49, 0.4); }
        .btn-download { background: #333; color: white; border: 1px solid #555; }
        .btn:hover { transform: translateY(-3px); filter: brightness(1.1); }

        .hero-visual { flex: 0.8; background: #000; padding: 20px; border-radius: 12px; border: 1px solid #222; }
        .code-window { font-family: 'Courier New', Courier, monospace; color: var(--accent); font-size: 12px; }

        /* --- 核心功能区 --- */
        .section-box { padding: 80px 20px; max-width: 1200px; margin: 0 auto; border-bottom: 1px solid #222; }
        .section-header { text-align: center; margin-bottom: 60px; }
        .section-header h2 { font-size: 36px; color: var(--primary); margin-bottom: 15px; }
        
        .feature-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(350px, 1fr)); gap: 30px; }
        .feature-card { background: var(--bg-card); padding: 35px; border-radius: 15px; border: 1px solid #222; }
        .feature-card h3 { font-size: 22px; margin-bottom: 15px; color: var(--secondary); display: flex; align-items: center; }
        .feature-card h3::before { content: '◈'; margin-right: 10px; color: var(--primary); }
        .feature-card ul li { font-size: 14px; color: var(--text-dim); margin-bottom: 8px; position: relative; padding-left: 15px; }
        .feature-card ul li::after { content: ''; position: absolute; left: 0; top: 10px; width: 4px; height: 4px; background: var(--primary); }

        /* --- 运行效果区 (左文右图) --- */
        .effect-row { display: flex; align-items: center; gap: 50px; margin-bottom: 60px; }
        .effect-row:nth-child(even) { flex-direction: row-reverse; }
        .effect-text { flex: 1; }
        .effect-text h4 { font-size: 24px; color: var(--secondary); margin-bottom: 15px; }
        .effect-text p { font-size: 15px; color: var(--text-dim); margin-bottom: 15px; }
        .effect-media { flex: 1; background: #1a1a1a; border-radius: 12px; overflow: hidden; border: 3px solid #333; position: relative; }
        .effect-media img { width: 100%; display: block; filter: grayscale(0.3); }
        .img-label { position: absolute; bottom: 10px; right: 10px; background: rgba(0,0,0,0.8); padding: 5px 12px; font-size: 12px; color: var(--accent); }

        /* --- 兼容性表格 --- */
        .comp-container { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; }
        .comp-card { background: #111; padding: 25px; border-radius: 10px; text-align: center; border-top: 4px solid var(--primary); }
        .comp-card h4 { margin-bottom: 15px; font-size: 20px; }
        .comp-card p { font-size: 13px; color: #888; text-align: left; }

        /* --- 部署指引 --- */
        .guide-wrap { background: #0a0a0a; padding: 40px; border-radius: 15px; border: 1px dashed #444; }
        .step-item { margin-bottom: 30px; }
        .step-title { font-weight: bold; color: var(--primary); margin-bottom: 10px; display: block; border-bottom: 1px solid #222; padding-bottom: 5px; }

        /* --- 底部 --- */
        footer { background: #000; padding: 60px 20px; text-align: center; border-top: 1px solid #222; }
        .disclaimer { font-size: 12px; color: #555; max-width: 800px; margin: 0 auto; line-height: 1.8; }

        /* --- 移动端响应式 --- */
        @media (max-width: 768px) {
            .nav-menu { display: none; }
            .hero { flex-direction: column; padding-top: 100px; text-align: center; }
            .action-btns { flex-direction: column; } /* 重点：手机端按钮一排一组 */
            .effect-row, .effect-row:nth-child(even) { flex-direction: column; gap: 20px; }
            .comp-container { grid-template-columns: 1fr; }
            .feature-grid { grid-template-columns: 1fr; }
        }