.banner-wrapper{width:1210px ;margin: 0px auto;background-color: #ddd;}
.banner-wrapper .banner{background-color: aqua;}
.banner-wrapper .banner{background-size: auto 100%;}
@media (min-width: 1024px) {

}

@media (max-width: 900px) {
  .banner-wrapper{width:100% ;margin: 0px auto;background-color: #ddd;}
}