Code, without a doubt, is better when it is more concise. In programming, relying on algorithms to simplify code and improve execution efficiency is absolutely the pursuit of perfection for every programmer. The same applies to CSS. Even comments in CSS, while they don't affect execution and make the code easier to read and modify, can still make the overall code appear redundant. Therefore, optimizing CSS and using CSS shorthand can help us break free from complex CSS code. However, syntactic shorthand cannot fundamentally solve the issue of unnecessary and junk code caused by developers' own writing habits during development. In many cases, it is necessary to re-examine completed webpage style sheets, identify unnecessary and junk code, and optimize them accordingly.