SassError 90var--num is not a number ╷81 │ for $val from 1 to $num 中文

There seems to be a syntax error in the code. The error message indicates that the variable $num is being used in a loop, but it is not being recognized as a number.

One possible solution is to check the value of $num and ensure that it is a number. It is also possible that the variable is not being declared or assigned a value before it is being used in the loop.

Without more context or code, it is difficult to provide a more specific solution.