#ios-bg { display: none }
@supports (-webkit-overflow-scrolling: touch) {
    #ios-bg {
        display: block; position: fixed; top: 0; left; 0; width: 100%; height: 100%; z-index: -1;
        background: url(//fileadmin/media/titel/vita.svg) top center no-repeat transparent; background-size: cover;
    }
}@supports not (-webkit-overflow-scrolling: touch) {
    body { background: url(//fileadmin/media/titel/vita.svg) top center no-repeat transparent; background-size: cover; background-attachment: fixed; }
}