@media only screen and (min-width: 750px) {
  .custom-related-products {
    margin-top:60px !important;
    margin-bottom:60px !important;
  }
}

@media only screen and (max-width: 749px) {
  .custom-related-products {
    margin-top:40px !important;
    margin-bottom:40px !important;
  }
}