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How to change the mobile drop down menu without affecting the web version?

For the drop-down menu currently, I have a trigger to change the text color for the Nav text in the web version but in the mobile version for the drop-down nav text once I scroll out of the trigger zone the text will turn black is there a way to fix it without affecting the web version? Please help~

https://preview.webflow.com/preview/demis-amazing-project?utm_medium=preview_link&utm_source=designer&utm_content=demis-amazing-project&preview=22df79de03de2c93c82ac1e9b7dad5fb&mode=preview