.xm-mask {
    position: fixed;
    z-index: $zindex-modal-bg;
    width: 100%;
    height: 100%;
    top: 0;
    left: 0;
    background: rgba(0, 0, 0, .8);
}

.xm-mask-transparent {
    position: fixed;
    z-index: $zindex-modal-bg;
    width: 100%;
    height: 100%;
    top: 0;
    left: 0;
}

.xm-mask-transition{
    display: none;
    position: fixed;
    z-index: $zindex-modal-bg;
    width: 100%;
    height: 100%;
    top: 0;
    left: 0;
    background: rgba(0,0,0,0);
    transition:background .3s;
}
.xm-fade-toggle{
    background: rgba(0,0,0,.6);
}