.yl  option{
  font-weight:normal;
  display:block;
  white-space:pre;
  min-height:1.2em;
  padding:0px 2px 1px;
}
 .yl li{
  float:left;    list-style: none;
}
  .yl  select#select{
  height:31px;
}
@media only screen and (max-width: 768px){
  
 .yl li {
    float: left;
    width: 100% !important;    list-style: none;
  }
}