.weixin{ width:55px; height:30px;z-index:999; float:left; position:relative;   margin:0px 10px;   font-size:12px; text-align:center;}
.weixin a{width:55px; height:30px; display:block; position:absolute; left:0; top:0;}
.weixin .weixin_nr{width:80px; z-index:999; overflow:hidden; height:80px; padding:5px; background:#fff; text-align:center; position:absolute; top:15px;  left:-10px;  display:none;}
.weixin .weixin_nr img{ margin-bottom:5px;}
.weixin .weixin_nr .arrow{ width:0; height:0; border-top:10px solid #fff;border-left:10px solid transparent;border-right:10px solid transparent; position:absolute; left:50px; top:120px;}
.weixin.on .weixin_nr{ display:block;}
.weixin.on a{}