.nav{position:relative; width:1100px;height:41px;left:180px;}
.nav-item{ position:relative; float:left; width:150px; height:41px; line-height:46px; text-align:center; font-size:14px; z-index:300}
.nav-item a{ display:block; height:41px; color:#000; font-weight:bold; font-size:16px;}
.nav-item a:hover{ color:#fff}
.move-bg{ display:none;position:absolute;left:0;top:0px; width:150px; height:41px; background:url(../images/navhk.png) center center no-repeat; z-index:260}