.about_top{width:1200px;height:75px;background:#fff;margin:0 auto;}
.about_top img{float:left;margin:5px 0 0 57px;}
.about_top .about_menu{ width:840px;height:75px;float:right;}
.about_top .about_menu li{float:left;font-size:16px;font-family:"微软雅黑";line-height:75px;width:93px;height:75px;text-align:center;background:url(../images/top_li_bg.png) no-repeat left center;}
.about_top li a{width:93px;height:75px;display:block;color:#333;}
.about_top li a:hover,.about_top .cur a{background:#30993a;color:#fff;}