#ios-bg { display: none }
@supports (-webkit-overflow-scrolling: touch) {
    #ios-bg {
        display: block; position: fixed; top: 0; left; 0; width: 100%; height: 100vmax; z-index: -1;
        background: url(/fileadmin/alle/bilder/270626killig293.JPG) center no-repeat transparent; background-size: cover;
    }
}@supports not (-webkit-overflow-scrolling: touch) {
    body { background: url(/fileadmin/alle/bilder/270626killig293.JPG) center no-repeat transparent; background-size: cover; background-attachment: fixed; }
}