.qr_code {
    margin-top: -7px;
    margin-bottom: 30px;
    text-align: center;
}

.qr_btn_top {
    width: 250px;
    height: 47px;
    background-color: yellowgreen;
    background-size: cover;
    background-position: center;
    background-repeat: no-repeat;
    border: none;
    border-radius: 6px;
    color: #fff;
    position: relative;
}