.sidebar{
    position: absolute;
    top: 650px;
    right: 20px;
}
.sidebar a{
    display: block;
    width: 49px;
    margin-bottom: 23px;
    font-size: 12px;
    color: #000;
}
.sidebar a>div{
    width: 49px;
    height: 40px;
    background: rgba(240,243,246,0.8);
    margin-bottom: 5px;
    overflow: hidden;
}
.sidebar a>div img{
    display: block;
    width: 22px;
    height: 22px;
    margin: 10px auto 0;
}
.sidebar a:hover div{
    background: rgba(212,226,255,0.6);
}