What is the common citation method of css?

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1. Internal reference

Internal references are css styles written in tags in html code, such as:

Bdoy {font-size:14px;}

two。 External reference

External references refer to external css files with tags, referencing styles into html code, for example:

3. Use in label

To use in a tag is to use the style attribute to change the current tag style, for example:

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