Fragmentation history of CSS-yuzhihui

Fragmentation history of CSS-yuzhihui 1. The position of the parent DIV block is affected when margin-top is set in the sub-DIV block.

Solution 1: If the sub-DIV block uses margin-top, add overflow: hidden to the parent DIV block;
Solution 2: Use padding-top in the sub-DIV block to replace margin-top.

2. The p element block in IE browser cannot block the ActiveX Control Interface

Solution: add the sub-element iframe to the p element block and set the corresponding style and attribute, for example:

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