Стиль для части заголовка - Вопросы по CSS

<?php
function zagalovka($anytext, $count)
{
	$title = "<h1 itemprop=\"name\">";
	$anytext = trim($anytext);
	if(stripos($anytext,' ')) {
		$title .= "<span class=\"chast1\">";
		$titles = explode(' ', $anytext);
			for($i=1;$i<=$count;$i++){
				$title .= $titles[$i-1]." ";
			}
		$title .= "</span>";
		$title .= "<span class=\"chast2\">";
			for($i;$i<=count($titles);$i++){
				$title .= $titles[$i-1]." ";
			}
		$title .= "</span>";

		} else {
		$title = "<span class=\"title1\">".$anytext."</span></h1>";
	}
	echo $title;
}
?>

	
<style>
	.chast1{
		color: red;
	}
	.chast2{
		color: blue;
	}
</style>

<?php
zagalovka("Слово 1 слово 2 слово 3", 4)
?>