issue about "Dolphin Demo"

When browse the web: http://demo.boonex.com/ with mobile browser, the title is like this:

The problem is: the words in the red box is too large.

How to make "Dophin Demo" smaller when using a mobile phone browser?

Try to add:

div.sys_main_logo .mainLogoText {
    font-size: 24px;
}

into templates/tmpl_evo/css/general_phone.css file.

Would you kindly tell me the detail location to insert?

thanks a lot.

into templates/tmpl_evo/css/general_phone.css file, at the end of file