It is not recommended to use @import for the following two reasons:
Reason 1. Using @import to introduce CSS will affect the browser’s parallel download
The CSS file referenced using @import will only know that there is another css that needs to be downloaded after the css file that references it is downloaded and parsed. Then it will be downloaded, and then after downloading Start a series of operations such as parsing and building render tree. This results in the browser being unable to download the required style files in parallel.
Reason 2: Multiple @imports will cause the download order to be disordered.
In IE, @import will cause the download order of resource files to be disrupted, that is, the js files listed behind @import are downloaded before @import, and disrupt or even destroy @import itself. Parallel downloads.
We can use the link tag to introduce css.
Recommended tutorial: css quick start
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