#scrollTop {
    background-color: rgba(000,000,000,.5);
    color: #fff;
    outline: 0;
    bottom: 24px;
    right: 24px;
    -webkit-transition: all 100ms linear;
    -moz-transition: all 100ms linear;
    -o-transition: all 100ms linear;
    -ms-transition: all 100ms linear;
    transition: all 100ms linear;
    -webkit-border-radius: 100%;
    border-radius: 100%;
}

#scrollTop:hover {
    background-color: #696767;
    -webkit-transition: all 100ms linear;
    -moz-transition: all 100ms linear;
    -o-transition: all 100ms linear;
    -ms-transition: all 100ms linear;
    transition: all 100ms linear;
}

#scrollTop i {
    line-height: 46px;
    width: 48px;
    height: 48px;
    text-align: center;
    font-size: 30px;
    color: #fff;
}