## Typography We create a font convention to ensure the best presentation across different platforms. ### Font

### Font Convention

Level	Font Size	Demo
Supplementary text	{{font_size_extra_small}} Extra Small	Build with Element
Body (small)	{{font_size_small}} Small	Build with Element
Body	{{font_size_base}} Base	Build with Element
Small Title	{{font_size_medium}} Medium	Build with Element
Title	{{font_size_large}} large	Build with Element
Main Title	{{font_size_extra_large}} Extra large	Build with Element

### Font Line Height

### Font-family ```css font-family: "Helvetica Neue",Helvetica,"PingFang SC","Hiragino Sans GB","Microsoft YaHei","微软雅黑",Arial,sans-serif; ```