.time-line-align(@align:left) {
  &-align-@{align} &-item-dot {
    @{align}: 0;
  }

  &-align-@{align} &-item-tail {
    @{align}: (@time-line-dot-side-length - @time-line-tail-width)/2;
  }

  &-align-@{align} &-item {
    padding-@{align}: @time-line-item-padding-left;
  }
}