div#phistory-bar {
    display: none;
}
.fixed-item {
    width: 60px;
    height: 60px;
    background: #fff;
    display: flex;
    justify-content: center;
    align-items: center;
    border-radius: 50%;
    position: fixed;
    z-index: 9999;
    cursor: pointer;
    right: 50px;
    bottom: 150px;
}

.fixed-item.btn-face-fixed {
    bottom: 30px;
}

.fixed-item.btn-zalo-fixed {
    bottom: 90px;
}