vant/src/row/index.less

.van-row {
  display: flex;
  flex-wrap: wrap;

  &--nowrap {
    flex-wrap: nowrap;
  }

  &--justify-center {
    justify-content: center;
  }

  &--justify-end {
    justify-content: flex-end;
  }

  &--justify-space-between {
    justify-content: space-between;
  }

  &--justify-space-around {
    justify-content: space-around;
  }

  &--align-center {
    align-items: center;
  }

  &--align-bottom {
    align-items: flex-end;
  }
}