the content is not centered after the page uses flex layout to set justify-content:center;
there are also settings for flex-wrap:wrap; view and no line change. Do any bosses know why?
/ / Please paste the code text below (do not replace the code with pictures)
css layout must be written wrong. Check carefully, the relationship between parent and child elements, width and height of parent-child elements, etc.
recommend an online gadget
https://demo.agektmr.com/flex.
that's because you flex-direction: column;
when the justify-content:center; is vertically centered
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