font-system-font-stack
- https://systemfontstack.com/
- https://github.com/tmcw/systemfontstack
- https://bitsofco.de/the-new-system-font-stack/#thefontstack
- https://markdotto.com/2018/02/07/github-system-fonts/
- https://www.client9.com/css-system-font-stack-monospace-v1/
- https://booking.design/implementing-system-fonts-on-booking-com-a-lesson-learned-bdc984df627f
- https://css-tricks.com/snippets/css/system-font-stack/
- [Never, ever use system-ui as the value of font-family — Not ready yet](https://infinnie.github.io/blog/2017/systemui.html)
## 非衬线
```css font-family: -apple-system, BlinkMacSystemFont, avenir next, avenir, segoe ui, helvetica neue, helvetica, Cantarell, Ubuntu, roboto, noto, arial, sans-serif; ```
## 衬线
```css font-family: Iowan Old Style, Apple Garamond, Baskerville, Times New Roman, Droid Serif, Times, Source Serif Pro, serif, Apple Color Emoji, Segoe UI Emoji, Segoe UI Symbol; ```
## 等宽
```css font-family: Menlo, Consolas, Monaco, Liberation Mono, Lucida Console, monospace; ```
> Your website doesn't need to look the same everywhere. It just needs to work everywhere. > > https://twitter.com/mrmrs_/status/775837789619417088