.top_li{
      width:80px;
	  height:50px;
	  line-height:50px;
	  margin-top:0px;
  	  margin-left:1px;
	  text-align:center;
	  cursor:pointer;
	  
   }
 .top_li:hover{
  color:#000000;
  font-weight:bold;
  }