IE not displaying my menu (top)

I am facing a tough time with IE.

My site is not showing the top menu in IE for the first time, But when i refresh it surprisingly it shows up. The problem snot there in Firefox.

https://www.brandbayconsultants.com/blog/

and the css is below, Any help will be highly appreciated

[Mod Note: Chunk of code removed. If you want to post large blocks of code, please use a pastebin.]

Please some one help me

Regards,
SV