How do I change the Font Size for Body Title on Single Pages?

Kindly have a look at http://computerguru-online.com. I need to reduce the font size of "Computer Repair & SEO Resources" body title.

That is the page title and is a H1. If you want to change THIS title only you can use a css insert

#post-3 .post-headline h1 {
    font-size:40px;
    }

Thanks.

Worked like a charm.