.menu li{width:200px;list-style:none;height:50px;margin-top:5px;margin-bottom:2px;background-color:#fff;line-height:50px;cursor:pointer}*{padding:0;margin:0}.left{width:200px;float:left;margin-right:10px;background-color:#f0f8ff}.right{width:850px;float:right;margin-left:10px}.main{width:1100px;margin:20px auto}