[Theme] WP Zoom Venture – CTA Top Button

I need to change the CSS for the top button that’s call to action. Below is the code that I’ve have. When I tried to do the background-color: #FFFFFF !important; it will just make it white and the text is white as well. I need a white box with blue text. I want the mouse over to be teal. Can somebody help me?

.wpzoom-calltoaction .cta-btn, #heading #top_button
{
a:link {color:#FFFFFF !important;}
a:hover {color:#10A4DD !important;}
/* background-color: #FFFFFF !important; */
}