.back-to-top {
    z-index: 10;
    width: 64px;
    height: 64px;
    border-radius: 8px;
    background-color:rgba(23,101,178,0.2);
    text-align: center;
    line-height: 64px;
    color: #fff;
    position: fixed;
    bottom: 0;
    right: 90px;
    display: flex;
    justify-content: center;
    align-items: center;
}
.back-to-top:hover {
    background-color:rgba(23,101,178,0.4);
}
.back-to-top img {
    width: 20px;
}
/*PC*/
@media screen and (max-width: 1024px) {
    .back-to-top {
        display: none;
    }
}