.menu { position:relative; z-index:9999; float:right; width:766px; padding-top:30px;}.menu ul{margin-left:40px;}.menu li { position:relative; z-index:999; }.menu .back { width:10px; height:5px; z-index:1; position:absolute; left:0; top:79px; background:#ec3f03; overflow:hidden;}#nav .item {position:relative; float:left; font-size:14px; padding:0 14.5px; display:inline; height:48px; cursor:pointer;}#nav .item a.link{ display:block; text-align:center; line-height:24px; color:#00739c;}#nav .dropdown{display:none; position:absolute; top:55px; left:0; width:280px; padding:24px 12px 18px 18px; background:url(../../../../Images/home/medicalsystem/zh-cn/bj_drop.png) repeat; font-size:12px;}#nav .dropdown .l_dor { float:left; width:60px;}#nav .dropdown .r_dor { float:right; width:220px; }#nav .dropdown .r_dor p { padding:0 10px; float:left; display:inline-block; line-height:22px; height:22px; color:#656565;}#nav .dropdown .r_dor .case_li a { display:block; height:22px; width:134px; float:left; }