.widgets_gallery_s1_list{display: flex}
.widgets_gallery_s1_list .item_box{width: 48%;padding: 10px;}
.widgets_gallery_s1_list .item_box a div{min-height: 150px;width: 100%;background-repeat: no-repeat;background-size: cover;background-position: center;}

@media screen and (min-width:640px){
    .widgets_gallery_s1_list{display: block}
    .widgets_gallery_s1_list .item_box{width: 48%;display: inline-block;}
}