#fondo:before {
  content:'';
  position: absolute;
  background:rgba(0,0,0,0.6) !important; 
  margin-top: -70px;
  width: 100%;
  min-height: 200px;
}
@media (max-width: 1280px){
  #fondo:before {
    margin-top: -70px;
  }
}
@media (max-width: 991px){
  #fondo:before {
    margin-top: -70px;
  }
}
@media (max-width: 767px){
  #fondo:before {
    min-height: 166px;
    margin-top: -55px;
  }
}
@media (max-width: 600px){
  #fondo:before {
    min-height: 143px;
    margin-top: -55px;
  }
}
@media (max-width: 480px){
  #fondo:before {
    min-height: 100px;
    margin-top: -33px;
  }
}


.desktop {
  display: block;
}
.movil {
  display: none;
}
@media (max-width: 767px) {
  .desktop {
    display: none;
  }
  .movil {
    display: block;
  }
}