Scroll Down Arrow Animation

The following code works to stop the blinking animation when entered in the quick css styles box on the theme but not in my external css file. I’d like to keep my custom styles together for future projects with Enfold. Any reason it does not work in my styles.css file?

#top .scroll-down-link {animation: none !important;}

Thank you.

http://www.albertinecouturehairsalon.com/home/