.qr-cover{
    position: fixed;
    background: rgba(0, 0, 0, 0.5);
    width: 100%;
    height: 100%;
    left: 0;
    top: 0;
    z-index: 999;
    display: none;
}
.qr-cover dl{
    position: absolute;
    width: 170px;
    height: 170px;
    padding: 15px;
    background: #FFFFFF;
    border-radius: 20px;
    left: 50%;
    top: 50%;
    margin: -100px 0 0 -100px;
}
.qr-cover dl dt{
    position: relative;
    width: 170px;
    height: 170px;
}
.qr-cover dl dt p{
    width: 170px;
    height: 170px;
    overflow: hidden;
}
.qr-cover dl dt span{
    position: absolute;
    display: block;
    width: 52px;
    height: 52px;
    right: -36px;
    top:-42px;
    background: url('./img/icon-close.png') 0 0 no-repeat;
    background-size: 100% 100%;
    cursor: pointer;
}