.scrollup {
    position: fixed;
    bottom: 50px;
    right: 50px;
    z-index: 999;
}
.scrollup .icon {
    width: 45px;
    height: 45px;
    border: 2px solid;
    text-align: center;
    line-height: 37px;
}
.osf-sticky-active.sticky-show {
    position: fixed;
    z-index: 9999;
}