.to-top-panel {
    position: fixed;
    bottom: -17px;
    right: 40px;
    opacity: 0;
    -webkit-transition: width 0.4s,height 0.4s,right 0.4s,opacity 0.4s,bottom 0.4s;
    -moz-transition: width 0.4s,height 0.4s,right 0.4s,opacity 0.4s,bottom 0.4s;
    -ms-transition: width 0.4s,height 0.4s,right 0.4s,opacity 0.4s,bottom 0.4s;
    -o-transition: width 0.4s,height 0.4s,right 0.4s,opacity 0.4s,bottom 0.4s;
    transition: width 0.4s,height 0.4s,right 0.4s,opacity 0.4s,bottom 0.4s;
    width: 10px;
    height: 10px;
    cursor: pointer;
    overflow: hidden;
    background: rgba(49, 49, 49, 0.8);
    color: #fff;
    font-size: 18px;
    text-align: center;
    line-height: 40px;
}
.to-top-panel.show {
    opacity: 1;
    display: block;
    width: 40px;
    height: 40px;
    bottom: 24px;/*4 17*/
    right: 17px;/*5*/
    z-index: 1000;
    border-radius: 0px;
}
.to-top-panel:hover {
    /*background: #67aedc;*/
    background: rgba(103, 174, 220, 0.8);
}

.to-top-panel > span {
    line-height: 36px;
}