A.x         {color: black; text-decoration: none; }
A.x:visited {color: black; text-decoration: none; }
A.x:active  {color: black; text-decoration: none; }
A.x:hover   {color: black; text-decoration: none; }

A.y         {color: white; text-decoration: none; }
A.y:visited {color: white; text-decoration: none; }
A.y:active  {color: white; text-decoration: none; }
A.y:hover   {color: red; text-decoration: none; }

A         {color: red; text-decoration: none; }
A:visited {color: red; text-decoration: none; }
A:active  {color: red; text-decoration: none; }
A:hover   {color: red; text-decoration: underline; }