.n-mask
  position fixed
  top 0
  left @top
  height @top
  width 100%
  z-index 1000
  display flex
  flex-direction column
  align-items center
  &-main
    position fixed
    top 0
    left @top
    height 100%
    width @height
    background-color rgba(0,0,0,.4)
  &-close
    position absolute
    right 20px
    top 20px
    width 32px
    font-size @width
    line-height @width
    // cursor pointer
    // color #BFBFBF