电商产品功能亮点提取

{
  "features_and_benefits": [
    "<ul>",
    "  <li>✅ Ergonomic design ensures maximum lumbar support for improved posture and comfort.</li>",
    "  <li>✅ 360-degree rotation allows full mobility and flexibility in any workspace.</li>",
    "  <li>✅ Adjustable height feature provides customization for optimal seating position.</li>",
    "  <li>✅ Designed for ultimate comfort during long hours of sitting.</li>",
    "</ul>"
  ],
  "total_count": 4
}

{
    "features_and_benefits": [
        "支持随时预约清洁路径，自动规划高效清洁。",
        "具备多楼层地图智能记忆功能，适应多样家庭环境。",
        "清洁效率高，提升生活便利性。"
    ],
    "total_count": 3
}