el código ahora es:
<div class="apartado">
<a href="wolf.html">
<img class="estilo1" src="images/wolf.jpg" width="274" height="202" />
<h1 class="estilo1">
THE IBERIAN WOLF
</h1>
<hr class="estilo1" size=1 width=12px align="left" color="#000000"/>
<p class="estilo1">
Interactive infographic about the Iberian wolf.
</p>
<hr class="estilo2" size=1 width=274px align="left" color="#000000"/>
</a>
</div>
A:link {text-decoration:none;color:#000;}
A:visited {text-decoration:none;color:#000;}
A:active {text-decoration:none;color:#000;}
A:hover {
text-decoration:none;
color:#999;
border-color:#999999;
}
A {outline:none;}
.apartado {
width:274;
height:auto;
margin: 0px 0px 0px 0px;
}