.img_plus_bg_style_3 .bg_con{position: absolute; top: 0; left: 0; width: 100%; height: 100%; z-index: -1;}

@media all and (min-width: 992px) {

    .img_plus_bg_style_3 .bg_con{top: 50%; transform: translateY(-50%); height: 50%;}

}