At the moment you have a link to a styleheet called style.css
<LINK HREF="style.css" TYPE="text/css" REL="stylesheet"> and also a lot of styles inside <style type="text/css">......</style> tags in the head section of the page.
If you want to use the stylesheet style_import.css instead, delete most or all of the styles inside the style tags and insert this:-
<link rel="stylesheet" href="style_import.css" type="text/css" media="screen,tv">
If this stylesheet is part of the template and you cannot get it, then create your own stylesheet by using Notepad and putting all the styles that are inside the style tags into a separate stylesheet called style_import.css
It can be in addition to your existing stylesheet style.css like this:-
<LINK HREF="style.css" TYPE="text/css" REL="stylesheet">
<link rel="stylesheet" href="style_import.css" type="text/css" media="screen,tv">
but you should then check that there are no duplications in both stylesheets.
Code downloaded to my PC will be deleted in due course.
WIN7; IE9, Firefox, Opera, Chrome and Safari for Windows; screen resolution usually 1366*768.
Also IE6 on W98 with 800*600 and IE8 on Vista 1440*900.