/* ///////////////////////////// */
.topBtn {
    font-family: sans-serif;
    display: block;
    position: fixed;
    right: 2vw;
    bottom: 2vw;
    box-sizing: border-box;
    padding-top: 30px;
    width: 70px;
    height: 70px;
    border-radius: 40px;
    background-color: #000000;
    color: #ffffff;
    text-align: center;
    text-decoration: none;
    font-weight: bold;
    font-size: 19px;
    line-height: 22px;
}

.topBtn:before {
    position: absolute;
    top: 10px;
    left: 0;
    width: 100%;
    content: "\25B2";
    text-align: center;
    font-size: 20px;
}