.page-support .topvis {
  background-image: url('/style/images/vis-xs.jpg');
}
@media screen and (min-width: 768px) {
  .page-support .topvis {
    background-image: url('/style/images/vis-sm.jpg');
  }
}
@media screen and (min-width: 992px) {
  .page-support .topvis {
    background-image: url('/style/images/vis-md.jpg');
  }
}
@media screen and (min-width: 1200px) {
  .page-support .topvis {
    background-image: url('/style/images/vis-lg.jpg');
  }
}
@media screen and (min-width: 1440px) {
  .page-support .topvis {
    background-image: url('/style/images/vis-hg.jpg');
  }
}