.chat-button{
    position: fixed;
    bottom: 20px;
    z-index: 999999;
    right: 90px;
}
.chat-button a{
    background: #fff;
    width: 70px;
    height: 70px;
    text-align: center;
    border-radius: 50%;
    font-size: 15px;
    line-height: 1;
    padding: 14px;
    color: #000;
    display: flex;
    align-items: center;
    box-shadow: 0px -1px 20px 0px #00000045;
}
.chat-button a:before {

}