.nav{ width:1157px; height:70px; margin:0 auto; overflow:hidden;}
.menubg{ width:100%; height:70px; margin:0 auto;background:#006DBC; overflow:hidden;}
.menu {font-family:"微软雅黑";  width:1157px; height:70px; position:absolute; z-index:123123; margin:0 auto;   }
.menu ul li a, .menu ul li a:visited {display:block; text-decoration:none; width:231px;; height:70px; text-align:center; color:#fff;   line-height:70px;  overflow:hidden;  font-size:18px; font-weight:bold;}

.menu ul {padding:0; margin:0;list-style: none;}
.menu ul li {float:left; position:relative;line-height:70px; padding:0 ;}
.menu ul li ul {display: none;}
/* specific to non IE browsers */
.menu ul li:hover a {color:#ff6; background:url(../images/dh.jpg) ; width:231px;; height:70px;}/********导航背景变色 ******/
.menu ul li:hover ul {display:block; position:absolute;  left:0; width:231px;;}
.menu ul li:hover ul li {}
.jg{ width:0px !important; background:url(../images/x.jpg) no-repeat; height:70px; padding:0px !important;}
.menu ul li:hover ul li a {display:block; background:#0052A8; color:#fff;line-height:24px; height:24px;border-top:#024B9A 1px solid; font-size:12px; font-weight:normal; }/******子栏目 背景*********/
.menu ul li:hover ul li a:hover { color:#ff6;line-height:24px; }/******子栏目 背景变色*********/
.menu img{ display:block;}
#bt{background:url(../images/dh.jpg) no-repeat; width:231px;; height:70px;}
/*导航结束*/