The project in idea imports the css file and reports red, ignores the css file and reports an error

Question: As shown in the figure: the imported css file keeps reporting red, how to ignore it?

 Solution :

1. Click the file --> right click --> Analyze --> Configure Current File Analysis  --> None (or directly ctrl+Alt+Shift+H after selecting the file)

2. Select None , and then wait for a while, the red mark disappears.

 

3. The red mark problem has disappeared.

 

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