Hello, I really like this template, there are a few problems don't know how to solve, the hope can get the help.
Question: how to modify the blog title and the post title, the contents of the article, all blog content of text font and font size. I'd like to revise the blog title text size and font style, font, use the "Microsoft Yahei" font, excuse me this how to modify, thank you.

I have his modified the CSS. PHP file, but through the FTP upload, found no change.

You shouldn't touch the theme files, look thru the theme options like ato->Style POSTS & PAGES