How to highlight the parameters of macro in elisp?

when configuring emacs, I found that the parameters of use-package were highlighted, as shown in the following figure, and "cc-mode" was highlighted blue by the editor.

macrouse-package

Why is this? How do you write a macro that highlights the parameters?

Mar.05,2021

this is the source code

(defgroup use-package nil
  "A use-package declaration for simplifying your `.emacs'."
  :group 'startup)

defgroup: https://www.gnu.org/software/.

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