Coffe
Попробуйте в HTML верх(Но я бы рекомендовал поставить стиль с очищенным фоном
<style type="text/css">.punbb .post,.punbb .post *,
#pun-crumbs1,#pun-status,#pun-break1,#pun-ulinks,.section.Fs,
#pun-announcement,#pun,#pun-stats,#pun-stats *,#pun-stats .statscon *,#html-footer,#pun-about,#pun-break4,#tieser-bottom,#pun-main,.punbb .category,
.punbb td.tc3, #tieser-bottom.container, .punbb .main .container, .punbb .post-links,
.punbb .section .container,punbb td.tc2,.punbb td.tcr, #pun .tc2, #pun .tcl, #pun .tcr, #pun-main h1,#pun-main h2,#pun-stats h2, .punbb .quote-box, .punbb .code-box,
#pun th, #pun-main .post h3 span, #pun-main .post h3, #pun-navlinks .container, #pun-ulinks .container,
#pun-main .post-links ul, #pun-main fieldset, #pun-main .formal textarea{
background-color: transparent !important; background-image: none !important;
border:none 0 transparent;
}
</style>#tieser-bottom::parent,
<script>$(document).ready(function(){$("#tieser-bottom").parent('.section').addClass('Fs')});</script>