can not get css file when unicorn running in production mode

Dear all

I’m newbie to unicorn server.

recently I got a problem when I was trying to run unicorn in production model.

like command unicorn -E production. then I lost all my css styles in the browser.

But everything works fine when I just type unicorn

when unicorn running in the production environment, I was trying to access my css file in the browser by the url ‘’, I got 'No route matches “/stylesheets/scaffold.css”

but it worked fine when unicorn running in the development environment.

Please help me, it’ll be very appreciated.

Best Regards,