.un-support {
    display: none;
    position: absolute;
    top: 0;
    right: 0;
    bottom: 0;
    left: 0;

    .back {
        position: absolute;
        top: 0;
        right: 0;
        bottom: 0;
        left: 0;
        background-color: #000;
        opacity: 0.7;
    }

    .tip {
        position: relative;
        margin-top: 10px;
        font-size: 15px;
        text-align: center;
        color: #fff;
    }
}