.about_detail{width:325px;margin:80px auto}.about_detail .three{font-size:14px;color:#808080}.youcan{background-color:#fff;padding:80px;clear:both;margin-top:80px;overflow:hidden;margin-bottom:80px}.youcan ul li{float:left;margin-bottom:20px}.youcan ul li.two{margin-left:100px}.youcan ul p{font-size:14px}