.seccion-galeria{
  position:relative;
  top:120px;
  margin-bottom: 220px;
}

.galeria{
  display: flex;
  flex-flow: wrap;
  justify-content: center;
}

.galeria img{
  max-width: 180px;
  margin: 4px;
  border-radius: 10px;
  border:1px solid gray;
}

@media (min-width: 320px) and (max-width: 768px){
  .galeria img{
    max-width: 140px;
    margin: 6px;
  }
}

  /********************************PDF*********************************************/
.seccion-catalogo{
  text-align: center;
  align-items: center; 
}
  .if_catalogo{
    position:relative;
    top:68px;
    margin-bottom:64px;
  }