.header-banner .isbanner{margin-right: -12%; margin-left: -15%;}
.header-banner .isbanner img{min-height: 420px;}	
@media (max-width:992px) {
  .header-banner .isbanner{margin-right: -15%; margin-left: -15%;}
  .header-banner .isbanner img{min-height: 228px;}	
}