IE not displaying my top menu

Hi Guys,

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

[Moderated] Please do not post such large sections of code. Use a code pastebin like https://wordpress.pastebin.ca/.

Please some one help me

Regards,
SV