#pagetop {
    position: fixed;
    right: 10px;
    bottom: 70px;
    margin: 0;
    z-index: 9999;
    
}
#pagetop a{
    position: relative;
    display: flex;
    width: 60px;
    height: 60px;
    justify-content: center;
    background: rgba(0,0,0,0.80);
    transition: opacity .6s ease;
    color: #FFF;
    align-items: center;
    text-decoration: none;
    font-size: 14px;
}
#pagetop a:hover {
    opacity: .3;
}
@media screen and (max-width:767px) {
#pagetop a {
    width: 50px;
    height: 50px;

}
}