CSS properties are not applied when compiling a .SASS file via the @import command, why is that?

Question

css

Hello, tell me why the import command does not work, while changes occur.
The bottom line is, there is a stuly.sass file where css commands are written:
Code example in "stuly.sass":
.body
font-size: 15px
font-family: 'Roboto Condensed Bold'
img
max-width: 100%
display: inline- block
stuly.sass = stuly.css the changes go through, but as soon as I add the "import" command to the "stuly.sass" file, the properties in "stuly.css" are shown but not applied in "index.html". It only works if I write to the "stuly.sass" file itself, then everything is ok. Why can this happen?
I 'll attach an example screenshot
...