.gallery-thumb{
width:264px;
float:left;
clear:none;
}
.gallery-thumb {float:left;width: 185px;height: 185px;margin:0 28px 28px 0;padding:0;overflow:hidden;}

.gallery-thumb:nth-child(4n) {
margin:0 0px 0 0;
}
.gallery-thumb img {
  height: 100%;
  min-width: 100%;
  left: 50%;
  position: relative;
  transform: translateX(-50%);
  -webkit-transform: translateX(-50%);
  -ms-transform: translateX(-50%);
}