常用有继承性的样式定义：
- text-indent
- text-align
- layout-flow
- writing-mode
- line-break
- white-space
- word-wrap
- list-style
- list-style-image
- list-style-position
- list-style-type
- font
- font-style
- font-variant
- font-weight
- font-size
- line-height
- font-family
- color
- text-transform
- letter-spacing
- word-spacing
