dedeCMS列表页中如何给前几条文章加单独样式？

<ul class="new33"><p>推荐内容</p></ul>
<ul class="new44">
{dede:arclist flag='c' titlelen=42 row=6}
<li class="nrn">[field:global runphp='yes' name=autoindex]
$a="<p class='nx01'>";
$b="</p>";
$c="<p class='nx02'>";
if (@me > 3) @me = $c.@me.$b;
else @me = $a.@me.$b;
[/field:global] <p class="nrz"> <a href="[field:arcurl/]" title="[field:fulltitle/]">[field:title/]</a> </p></li>
    {/dede:arclist}
</ul></div>