[2.1 产品概述](2.1%E4%BA%A7%E5%93%81%E6%A6%82%E8%BF%B0.md) [2.2 功能特点](2.2%E5%8A%9F%E8%83%BD%E7%89%B9%E7%82%B9.md) [2.3 系统主界面组成](2.3%E7%B3%BB%E7%BB%9F%E4%B8%BB%E7%95%8C%E9%9D%A2%E7%BB%84%E6%88%90.md)