Como deixar o fundo dos tópicos transparente?

• Descrição:

Pessoal eu queria saber como deixar o fundo dos meus tópicos transparente, mas não estou falando do tópico em si, estou falando dos sub-foruns, aqueles que tem o titulo e a pequena descrição, no fundo deles sempre tem um fundo, eu queria saber como deixar esse fundo transparente.

• Informações:

Código:

.pun .main-content {background-color: rgba(151, 197, 232, 0.61)!important;border: 1px solid #000;}.pun table.table td {background-color: rgba(151, 197, 232, 0.44)!important;}

Código:

.pun .main-foot .h2, .pun .main-head .h2 {
color: black !important;
}
.pun {width: 94%;}

#content-container div#container {
    float: left;
    margin-right: -6px;
    width: 98%!important;
}
div.topic-title-container {
  display: inline;
  font-size: 12px;
  text-align: center;
  }
#page-header #search-box {
display: none;
}
em{
font-style: normal;
}


.module .postbody .postbody-head {
background-color: #e5e6e7;
}

.post-footer {
background-color: #CCCCCC;
}

.post .post-header {
background-color: #CCCCCC;
}

#submenu ul li a img {
margin-left: -1px;
margin-right: -1px;
}

.headerbar {margin-bottom:0;}

blockquote {
background-color:#CCCCCC;
}

ul.linklist li a img {
filter:alpha(opacity=30);
-moz-opacity: 0.3;
opacity: 0.3;
}
ul.linklist li a img:hover {
filter:alpha(opacity=100);
-moz-opacity: 1.0;
opacity: 1.0;
cursor:allowed;
}

a {

outline: none;

}
.postbody table {
z-index: 999;
min-width: 1px;
max-height: 1500px;
position: \'\';
max-width: 1500px;
}
.sig-content table{
z-index: 999;
min-width: 1px;
max-height: 1500px;
position: \'\';
max-width: 1500px;
}
.postbody table {
z-index: 999;
min-width: 0px;
max-height: 0px;
position: \'\';
max-width: 0px;
}
.sig-content table{
z-index: 999;
min-width: 0px;
max-height: 0px;
position: \'\';
max-width: 0px;
}

.fontbutton, .fontbutton_normal {
border-radius: 5px 0099FF;
}


body.chatbox #chatbox p.clearfix{margin-top:5px;margin-bottom:5px}
#chatbox, .chatbox_row_1, .chatbox_row_2 {
background-color: transparent;
}

#chatbox,#chatbox_members,#chatbox_members .member-title{background:white!important}#chatbox_members{border-right: none}

#chatbox_footer{background:#73CFE6!important}

.spoiler_content.hidden{background:white!important}

.spoiler_content.hidden{background:white!important}


#myfooter img{
border: 0px;
margin-top: -12px;
padding-right: 20px;
}
a[href="/u4"] {
background: url("http://i46.servimg.com/u/f46/17/36/33/20/pxg8710.gif");
}
#pun-navlinks ul li a{margin:0px}
.mainmenu {padding: 0px !important;margin: 0px !important}

.mainmenu img {
margin-left: -2px;
margin-right: -2px;
}

body{background-image:url(http://i55.servimg.com/u/f55/17/45/31/00/fundo11.jpg);background-repeat:no-repeat;background-size:100% 100%!important;background-attachment:fixed!important}
.pun {
-moz-border-radius: 20px;
-webkit-border-radius: 20px;
border: 1px solid #000000;
}
.pun {
border: 1px solid transparent;
}
#pun-intro {
background: rgba(142,35,35);
border: 1px solid #000000;
border-radius: 20px;
}
#pun-intro {
background: rgba(103, 80, 186, 0.59);
-moz-border-radius: 20px;
-webkit-border-radius: 20px;
border-radius: 20px;
margin-bottom: 20px;
}
.pun .topic {
background: transparent;
border: 1px solid transparent;
}
#content-container div#container{background:rgba(153, 80, 186, 0.59);padding:12px;-moz-border-radius:12px;-webkit-border-radius:12px;border-radius:12px}

.main {
border-radius: 15px !important;
}

.main-content {
border-radius: 5px !important;
}

.module-main {
border-radius: 15px !important;
}

#pun-head #pun-navlinks, .main-box, #frame_chatbox{-moz-border-radius:10px;-webkit-border-radius: 10px}.main .main-head{border-top-left-radius:10px;border-top-right-radius:10px}

#onlinelist {
border-radius: 12px !important;
}

.main-content {
  margin-bottom: 10px !important;
}

.h3{
color:#000000!important;
}

h2 {
  color: #000000 !important;
}

#pun-visit {display: none;}

.pun table td.tcl {
height: 55px!important;
}
.hierarchy {
    margin-left: -40px;
}

.status > img {
    margin-top: 15px;
}
.main-content .tcl.tdtopics {
  color: rgba(0, 0, 0, 0);
}
.pagination:after {
    color: #000000;
    content: " ]";
}
.pagination:before {
    color: #000000;
    content: "[ ";
}
.tcl.tdtopics > a:last-child:before {
    color: #000000;
    content: "Por ";
}
.tcl.tdtopics > a:last-child {
display: block;
margin-left: 10px !important;
margin-top: 10px !important;
text-decoration: none !important;
}
.tcl.tdtopics strong {
  color: #000000 !important;
}
.tcl p, .tcl span:nth-of-type(2) {
  margin-left: -40px !important;
}

div#main-content div div table tbody tr td span a {
font-family: Arial;
}
div#main-content div div table tbody tr td span a br {font-family: Arial !important;}

Cógidos do Ness, extras, não altere.
.postbody a, .postbody .content div a, .postbody .post-entry div a {
  display: inline-block;
  max-width: 300px;
  overflow: hidden;
  white-space: nowrap;
  text-overflow: ellipsis;
}

ness {
color: blue;
text-shadow: 0 0 5px blue;
}

.main .main-head {
background-color: #1d1d1d;
background-image: url(http://i39.servimg.com/u/f39/17/45/31/00/fundo_13.jpg);
background-repeat: no-repeat;background-size:100% 100%!important
color: #f5f5f5;
padding: 8px 8px 8px 15px;
vertical-align: middle;
zoom: 1;
}



Códigos do Ness:

#chatbox_members {
background:  url(http://i25.servimg.com/u/f25/14/45/99/41/50347510.png);
margin-bottom: -30px;
  border-right: 1px solid #c9c9c9;
background-color: #ffffff;
}
h4.member-title{
background: url(http://i25.servimg.com/u/f25/14/45/99/41/untitl23.jpg) repeat-x !important;
font-family: Arial;
text-transform: uppercase;
color: #ffffff !important;
text-shadow: 0px 0px 3px black;
margin-top: 0px;
cursor: default;
letter-spacing: 0.5em;
}

#chatbox_members ul li {
padding-left: 10px;
}

#chatbox_members ul li:hover {
background-color: #f4f4f4;
background-image:url('');
background-repeat: no-repeat;
background-position: center left;
}
#chatbox_members ul li:active {
background-image:url('https://imagizer.imageshack.us/v2/16x16q90/824/midn.png');
}
#chatbox_members ul li a {
text-shadow: 1px 1px 1px #ffffff;
font-size: 13px;
color: #909090 !important;
text-decoration: none;
}
#chatbox_members ul li a:hover {
  color: #393939} !important;
  text-decoration: none !important;

#chatbox_header {
    background: url(https://imagizer.imageshack.us/v2/44x54q90/c/823/3you.jpg);
    }
    #chatbox_footer {
    background: url(https://imagizer.imageshack.us/v2/44x54q90/c/823/3you.jpg) !important;
    }

    #chatbox_members {
    background: #BFEFFF;
    }
    #chatbox {
    bottom: 30px;
    left: 181px;
    line-height: 10px;
    overflow: auto;
    position: absolute;
    right: 0;
    top: 30px;
    box-shadow: white 1px 1px 30px 1px;
    }
    #frame_chatbox {
    border-radius: 30px;
    box-shadow: 0 0 30px 3px black;
    }
    #chatbox_main_options {
    z-index: 50;
    position: relative;
    color: white;
    }
    .cattitle strong {
        color: white;
        font-size: 20px;
        padding-left: 15px;
    }
    #chatbox_main_options a {
        color: white;
        text-decoration: none;
        font-size: 15px;
    }
    #chatbox_members a {
    }
.chatbox_row_2 {
    background-color: white;
    padding: 4px;
    }
    .chatbox_row_1 {
    background-color: white;
    padding: 4px;
    }
#chatbox_header {
  background-image: url(https://imagizer.imageshack.us/v2/44x54q90/c/823/3you.jpg);
} 

#chatbox_members ul {
list-style: none;
margin: 0px;
}
#chatbox_members:hover {
border-right: 1px solid #b7b7b7;
background-color: #fcfcfc;
}
Escreva o novo CSS apartir da linha de baixo.