CSS content of Counter-reset, content-increment

Never thought, wrote a quick three-year front end, there is no use of CSS, incredibly still have not heard, have seen the CSS properties, but also the content of CSS2!

About Counter-reset, content-increment two properties of the details can see Zhang Xin Xu's blog: "CSS counter (serial numeric character auto-increment) detailed", here to make a record, write a demo

<! DOCTYPE html>
Compatibility is good:
CSS content of Counter-reset, content-increment