nutui/src/packages/col/index.scss

.nut-col {
  float: left;
  box-sizing: border-box;
  word-break: break-all;
}

@for $i from 1 through 24 {
  .nut-col-offset-#{$i} {
    margin-left: 100/24 * $i * 1%;
  }

  .nut-col-#{$i} {
    width: 100/24 * $i * 1%;
  }
}