.desk{
  
}

@media screen and (max-width : 19420px){
  .div-only-mobile{
  visibility:hidden; 
  display: none;
  }
}
@media screen and (max-width : 906px){
 .desk{
  visibility:hidden;
  display: none;
  }
 .div-only-mobile{
  visibility:visible;
  display: block;
  }
}