Oops, try again. It looks like your header's font-size is 32px instead of 16px

16px is one unit, i can’t contain any spaces or enters. Can i see a updated version of your code?

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It was exactly the same as before with the colon instead of ‘=’. I think it’s just the Chrome issue, it worked on Safari just now. Thanks!

Appreciate for your response
After I read all the comments , I find that it works better on Safari. haha :grin: