该项目是一个纯静态页面项目，仿照旧版腾讯课堂的布局尺寸，自己纯手工仿写，里面包含部分就是动画效果，有自己的代码实现逻辑。(This project is a pure static page project. It imitates the layout size of the old Tencent class, and imitates it purely by hand. It contains animation effect and has its own code to achiev