/* @import url('http://example.com/example_style.css'); */

/***********************************************/
/* CSS @imports must be at the top of the file */
/* Add them above this section                 */
/***********************************************/

/*****************************************/
/* Start your style declarations here    */
<style> 
h1 { font-family: 'HTU25 Headers Font'!important; }   
h2 { font-family: 'HTU25 Headers Font'!important; } 
h3 { font-family: 'HTU Headers Font'!important; } 
subheadline { font-family: 'HTU Headers Font'!important; } 
</style>