Detailed explanation of the effect of margin negative (graphic tutorial)

We use the margin in CSS, but the margin is set to negative, that may not be good to handle, margin negative value is not hack,margin negative values follow the flow of the document, if the use of margin negative to force an element upward displacement, then the relevant elements will also occur with the displacement , margin negative can be well compatible with each browser.

1. There are two borders, there are different background colors, regardless of the height of the increase, the other side also become high

2. Realizing self-adapting

The above is I arrange for everyone, hope in the future will be helpful to everyone.

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