关于盒子模型还是有点没明白,求指教？

Answer 1

I still don’t understand a bit about the box model. Could you please give me some advice? -PHP Chinese website Q&A-I still don’t understand a bit about the box model. Could you please give me some advice? -PHP Chinese website Q&A

Please watch and learn.

Answer 2

这样讲吧，我们来看一个例子  <div id="nav">

nav相当于这个盒子的身份证号码，只是一个名称；给nav设置css样式，就是给名称叫nav的盒子设置样式。