HTML base ul-Li unordered list nesting

Li Wu:
Heng Learn to think together, honouring teachers save Thanksgiving. Leaf See root three return to one, rivers the same oneness.
Meekness Conscience Lord, willing to do without regrets to the most bitter. Reading exercises to keep the body and mind, sincere advice and the line and cherish.

Ide:visual Studio 2017
Browser:chrome/firefox
Os:win7

Code

<! DOCTYPE html>
　　
Effect
Extended
Instead focusing: When the unordered list is nested, it is a static effect that can be combined with JavaScript to achieve a dynamic effect similar to the File Manager in a Windows system. That is, the mouse point, nested list expansion, mouse a little bit, nested list retract. Waiting to learn ...
HTML5 + CSS3, excellent, worth learning.
Learning resources: www.w3cschool.cn + itcast and Itheima video library + Pure Heart.
If you have public resources, can share to me, with your resources to learn also can.
Blog post is to watch the video, into thinking written. It's good that the teacher speaks well. Blog bad, is to give the most bitter not serious.
HTML base ul-Li unordered list nesting