.ngparasfxgallery {
    position: relative;
}

.ngparasfxgallery>div {
    position: sticky;
    height: 100vh;
    width: 100%;
    top: 0;
    left: 0;
    overflow: hidden;
}

.ngparasfxgallery>div>div {
    position: absolute;
    top:0;
    left:0;
    width:100%;
    height:100%;
    transition: opacity 1s;
    background-position: center center;
    background-size: cover;
    background-repeat: no-repeat;
}