How to Navigation Bar needs improvement

i have received message by CodeCanyon team. they have gave 4 point suggestion improvement. i have already resolve all point and was submitted. but again same message received. can you help? how to imporve four point give below.

Unfortunately not all changes were addressed. Please carefully examine the previous review and resubmit.

Previous review:

  1. Please improve the formatting of your HTML demo files.

  2. Please move all CSS to external stylesheets and keep all plugin CSS/JS separate from demo CSS/JS

  3. This category is reserved for 100% pure CSS items. Please indicate if this item requires JS.

  4. Please avoid generic CSS styles/rules that will cause collision issues in buyer templates.

our item link here.