.box-categories-list ul .displayTree,.box-categories-list ul ul {
   background-color:rgba(0,0,0,0.1);
   border:1px solid rgba(0,0,0,0.3);
 }
 .box-categories-list a:hover  {
   text-decoration:underline;
 }
li.navbox-title {
  display:block!important;
  color:#000!important;
  font-weight:bold!important;
}
li.navbox-title:hover {
  background:transparent!important;
  background-color:transparent!important;
}