@media (max-width: 849px){
  .collectionbanner {
    height: 250px !important;
}
}
@media (max-width: 639px){
  .collectionbanner {
    height: 315px !important;
  }
}
@media (max-width: 466px){
  .collectionbanner {
    height: 380px !important;
  }
}