font-variant
font-variant 属性是 font-variant-caps, font-variant-numeric, font-variant-alternates, font-variant-ligatures, font-variant-east-asian (en-US)等属性的简写。你也可以使用简写 font 设定 font-variant 在 CSS Level 2 (Revision 1) 中的值（即 normal 或 small-caps）。
<https://developer.mozilla.org/zh-CN/docs/Web/CSS/font-variant>
Font Variant Numeric
<https://www.tailwindcss.cn/docs/font-variant-numeric>
用法
| Class | Properties |
|---|---|
| normal-nums | font-variant-numeric: normal; |
| ordinal | font-variant-numeric: ordinal; |
| slashed-zero | font-variant-numeric: slashed-zero; |
| lining-nums | font-variant-numeric: lining-nums; |
| oldstyle-nums | font-variant-numeric: oldstyle-nums; |
| proportional-nums | font-variant-numeric: proportional-nums; |
| tabular-nums | font-variant-numeric: tabular-nums; |
| diagonal-fractions | font-variant-numeric: diagonal-fractions; |
| stacked-fractions | font-variant-numeric: stacked-fractions; |
看文档吧，如果对英文、字母的一些渲染感兴趣可使用