//standard:标准24栅格5+无单数  full:24栅格全尺寸 tiny:12栅格5+无单数
$v='standard'
$max_row=24
$list = 1, 2, 3, 4, 5, 6, 8, 10, 12, 14, 16, 18, 20, 22, 24
if $v=='tiny'
  $max_row=12
  $list = 1, 2, 3, 4, 5, 6, 8, 10, 12
if $v=='full'
  $max_row=24
  $list = 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24

span(int, v)
  >.span-{int}
    if v=='vertical'
      height round((int / $max_row * 100)%)
      width auto
    else
      width round((int / $max_row * 100)%)
      height auto

offset(int, v)
  .offset-{int}
    margin-{v} round((int / $max_row * 100)%)

order(int)
  >.order-{int}
    order int

gutter(int, v)
  >.gutter-{int}
    if v=='vertical'
      padding-top (int/2)px
      padding-bottom (int/2)px
    else
      padding-left (int/2)px
      padding-right (int/2)px

gutter-child(int, v)
  &.gutters-{int}
    for num in $list
      >.span-{num}
        if v=='vertical'
          padding (int/2)px 0
        else
          padding 0 (int/2)px

.flex
  display flex
  flex-direction row
  height 100%
  width 100%
  for num in $list
    offset(num, 'left')
    gutter(num, 'horizontal')
    gutter-child(num, 'horizontal')
  &.wrap-reverse
    flex-wrap wrap-reverse
  &.wrap
    flex-wrap wrap
  &.start
    justify-content flex-start
  &.end
    justify-content flex-end
  &.center
    justify-content center
  &.between
    justify-content space-between
  &.around
    justify-content space-around
  &.top
    align-items flex-start
  &.bottom
    align-items flex-end
  &.middle
    align-items center
  &.baseline
    align-items baseline
  &.stretch
    align-items stretch
  &.vertical
    flex-direction column
    for num in $list
      offset(num, 'top')
      gutter(num, 'vertical')
      gutter-child(num, 'vertical')
    &
      for num in $list
        span(num, 'vertical')
  &
    for num in $list
      span($max_row, 'horizontal')
      span(num,'horizontal')
      order(num)
    .fill
      flex-grow 1
      overflow auto