.column4 .image-holder{float:left;margin-right:20px;width:calc(25% - 15px)}.column4 .image-holder:last-child{margin-right:0}@media only screen and (max-width:991px){.column4 .image-holder{margin-bottom:15px;margin-right:30px;width:calc(50% - 15px)}.column4 .image-holder:nth-child(2){margin-right:0!important}}