.top { background: #245399;height: 40px; width: 100%;line-height:40px;font-size:16px; color:#fff;}
.top a{color:#fff;}
.header{height:135px;width:100%; background:url(../images/diwen.jpg);}
.sousuo{width:345px;height:40px;border-radius:50px;border:solid 1px #83b3ff;float:right;margin-top:45px;padding-left:45px;background:url(../images/sousuo.jpg) no-repeat 15px 10px;}
.nav{width:100%;height:58px;background-color:#317ac9;}
.nav_item{width:150px;height:100%;text-align:center;line-height:55px;font-size:18px;color:#ffffff;float:left;}
.nav_item:hover{background-color:#2c6eb4;cursor:pointer;}
.nav_item i{font-size:26px;margin-right:12px;}
.nav_on{background-color:#2c6eb4;}