.my-cover {
    border-radius: 50%;
    background-size: contain;
    box-shadow: inset 1px 1px 0 rgba(0,0,0,.05), inset -1px -1px 0 rgba(0,0,0,.05);
    line-height: 259px;
    font-weight: bold;
    color: white;
    text-align: center;
}
.backToTop {
     border: 1px dashed;
     display: none;
     width: 18px;
     line-height: 1.2;
     padding: 5px 0;
     background-color: #fff;
     color: #000;
     font-size: 12px;
     text-align: center;
     position: fixed;
     _position: absolute;
     right: 10px;
     bottom: 100px;
     _bottom: "auto";
     cursor: pointer;
     opacity: .6;
     filter: Alpha(opacity=60);
}