原子化 CSS
常用 CSS 类
定位：absolute relative fixed sticky top right bottom left
尺寸：w h w-full h-full w-auto h-auto min-w max-w min-h max-h
边距：
- 外边距：m mx my mt mr mb ml
- 内边距：p px py pt pr pb pl
边框：border-solid border-b-1 border-gray-2
圆角：rounded rounded-sm rounded-md rounded-lg rounded-xl
字体：
- 字号：text-30 text-32
- 字重：font-medium font-bold
- 颜色：text-font-color-primary text-font-color-normal text-font-color-secondary text-font-color-placeholder
flex 布局
flex flex-row flex-col flex-wrap flex-nowrap justify-start justify-end justify-center justify-between justify-around items-start items-end items-center items-stretch