There are more than one CSS file in many topics, mainly to accommodate different browsers, because they are somewhat different in interpreting CSS.
But have you ever thought of using a CSS style sheet for a single page?
First open the header.php file and locate the following code:
<link rel= "stylesheet" href= "<?php bloginfo (' Stylesheet_url ');?>"
Type= "Text/css" media= "screen"/>
For example, to use a separate style sheet on a category page, make the following modifications:
<?php if (is_category (' 1 ')) {
<link rel= "stylesheet" href= <?php bloginfo (' Template_url ');? >/cat-1.css "
Type= "Text/css" media= "screen"/>;
<?php} else {?>
<link rel= "stylesheet" href= "<?php bloginfo (' Stylesheet_url ');?>"
Type= "Text/css" media= "screen"/>
<?php}?>
The code above lets the category 1 page cat-1 with the stylesheet, while the other pages use a generic style sheet.