分析CSS布局神器

只要在页面下加入如下css，整个css布局就清晰了

      * { background-color: rgba(255,0,0,.2); }
      * * { background-color: rgba(0,255,0,.2); }
      * * * { background-color: rgba(0,0,255,.2); }
      * * * * { background-color: rgba(255,0,255,.2); }
      * * * * * { background-color: rgba(0,255,255,.2); }
      * * * * * * { background-color: rgba(255,255,0,.2); }
      * * * * * * * { background-color: rgba(255,0,0,.2); }
      * * * * * * * * { background-color: rgba(0,255,0,.2); }
      * * * * * * * * * { background-color: rgba(0,0,255,.2); }

from：https://juejin.im/post/5d730220f265da03e4678453

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