Main Menu Navigation css Parsing Error

I’m trying to get rid of the first “About Us” in the main navigation bar at the top of my blog. Trying to make adjustments in the CSS I did something wrong and now get a parsing error in:

Parse error: syntax error, unexpected ‘;’, expecting ‘)’ in /home6/creatje6/public_html/Blog/wp-content/themes/suffusion/admin/theme-options-blog-features.php on line 164

I can’t get into the areas that control the menu without the parsing error popping up.

Can someone help me fix this?

Thanks
J-M