1. list-style: none;
Set list labeled default is set to none solid dot is not marked list format
2. box-sizing: border-box;
CSS3 box model, using the box Save mode
3.text-decoration: none
Cancel underlined text
4.vartical-align：middle、baseline、top、bottom
The block control lines and text alignment, line elements in the block write
5.opacity、rgba（）
Transparency control element, opacity are inherited, rgba () no inheritance