#page_top {
    position: fixed;
    bottom: 30px;
    right: 20px;
    z-index: 100;
}
/* #page_top a {
    background-color: #999;
    color: #fff;
    text-align: center;
    text-decoration: none;
    padding: 20px 20px;
} */
#page_top a:hover {
    /* background-color: #666; */
    text-decoration: none;
}

.fas {
    font-size: 38px;
}