@media screen and (min-width: 960px){
.ycwb{display:none;} 
.ycwb{height: auto;position: absolute;overflow: hidden;z-index: 99999;left: 90px;}
#div3{width: 140px;line-height: 40px;float: left;}
#div3 li{float:left;line-height: 30px;height: 30px;margin-right:5px;margin-bottom: 5px;}
#div3 li a{float:left;line-height: 30px;height: 30px;background: #1f8fdb;}
#btn{float:left;width: 42px;height: 42px;}
}
@media screen and (max-width:780px){
 .ycwb{display:block;} 
}
.ycwb{height: auto;position: absolute;overflow: hidden;z-index: 99999;left: 20px;}
.ycwb img{width:40px;height:40px;}
#div3{width: 140px;line-height: 40px;float: left;display:none;}
#div3 li{float:left;line-height: 30px;height: 30px;margin-right:5px;margin-bottom: 5px;}
#div3 li a{float:left;line-height: 30px;height: 30px;background: #1f8fdb;color: #fff;}
#btn{float:left;width: 42px;height: 42px;}
}