@media (max-width:991px) {
  .two-h-mob img{
    width: 280px;
  }
}
@media (max-width: 767px) {
  .three-mob img{
    width: 200px;
  }
  .three-mob img.iphone-mid{
    width: 250px;
  }
  .two-h-mob img{
    width: 230px;
    padding: 50px 0;
  }
}

@media (max-width: 450px) {
  .three-mob img{
    width: 150px;
  }
  .three-mob img.iphone-mid{
    width: 200px;
  }
}