body{
    background-color: #000;
    height: 1920px;
    margin: 0;
    overflow: hidden;
    padding: 0;
    position: relative;
    width: 1080px;
}
.background-image{
    height: 1920px;
    overflow: hidden;
    position: relative;
    width:1080px;
}
.kb-slide{
    position: absolute;
    z-index: 1;
    opacity: 0;
}

.kb-slide img{
    position: relative;
    -webkit-transform: translate3d(0,0,0)
    -moz-transform: translate3d(0,0,0);
    -webkit-backface-visibility: hidden;
    -moz-backface-visibility: hidden;
}