A part of the work has been completed, the remaining work content is:
Refactor the CSS breakpoints that do not belong to the currently defined four breakpoint values into one of the four.
If there are special requirements, you need to write comments explaining the reason, or add a new breakpoint variable, but this requires a lot of consideration.
Refs: https://getbootstrap.com/docs/5.0/layout/breakpoints/
A part of the work has been completed, the remaining work content is: