Article From:https://www.cnblogs.com/xudong-bupt/p/9064988.html

To write web pages, we need to set the spacing between elements to make the layout more beautiful.

Record it.

 


 

Reference resources:

cssBox model, http://www.runoob.com/css/css-boxmodel.html

css3Tutorial, http://www.runoob.com/css3/css3-tutorial.html

 

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Link of this Article: HTML box model

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