Hallo,
probiers mal so:
1.class:
a.standart { font-family: Arial, Helvetica, sans-serif; font-size: 11px; font-style: normal; font-weight: normal; color: #990505; text-decoration : none; }
a.standart:hover { font-family: Arial, Helvetica, sans-serif; font-size: 11px; font-style: normal; font-weight: normal; color: #990505; text-decoration : underline; }
2.class
a.standartzwei { font-family: Arial, Helvetica, sans-serif; font-size: 15px; font-style: normal; font-weight: normal; color: #990505; text-decoration : none; }
a.standartzwei:hover { font-family: Arial, Helvetica, sans-serif; font-size: 15px; font-style: normal; font-weight: normal; color: #990505; text-decoration : underline; }
3.class
a.standartdrei { font-family: Arial, Helvetica, sans-serif; font-size: 15px; font-style: normal; font-weight: normal; color: #990505; text-decoration : none; }
a.standartdrei:hover { font-family: Arial, Helvetica, sans-serif; font-size: 15px; font-style: normal; font-weight: normal; color: #990505; text-decoration : underline; }
<a href="#" class="standart">
oder
<a href="#" class="standartzwei">
oder
<a href="#" class="standartdrei">