.subslider-cont {
  width:100%;
  height:auto;
  position:relative;
  overflow:hidden;
  margin:0px 0px 0px 0px;

}
.subslider .img {
  height:0;
  padding-top:56.4%;
  width:calc(100% - 20px);
  margin:10px;
  background-size:cover;
  background-position:center;
    border-radius: 8px;
}