How to change the appearance of less mixins in PyCharm?

Question

Less

Hello, when working with a less file in PyCharm, I often use Reformat Code in this program. Everything was fine until I started using less mixins. Pycharm formats them the way I don't want.
For example, I wrote the following less code.

And when I press Reformat code (ctrl + alt + L), it becomes like this.

How can I make it not fold into one line, thanks!