.nav{
padding:0px 80px;
line-height:50px;}
.liebiao{
float:left;
width:1340px;
height:40px;
line-height:40px;
border-bottom:dashed 1px #999
;}
.liebiao:hover{
background-color:#99CCff;}
.liebiao a{
float:left;
width:1230px;
padding-left:10px;}