h2, .h2 {
    font-size: 1.5em;
    line-height: 1.08333;
 color:white;
}



h2.section-header {}

/*----------------------------------------------------*/
/*Definition der H2
/*----------------------------------------------------*/

<div id="teaser" class="site-main">
<div class="row">
<h2 class="section-header">unseretopten</h2>