<style>
.punbb .post-content .quote-box:not(.spoiler-box) {
background:none;
border:0!important;
position:relative;
overflow:hidden;
min-height:35px!important;
margin:10px 0;
padding:10px 0 10px 5px;
}
.punbb .quote-box:not(.spoiler-box) > blockquote > p {
font-size:14px; /*размер шрифта*/
line-height:18px;
color:#504536; /*цвет шрифта */
font-family:Georgia; /*шрифт*/
font-style:italic;
}
.punbb .quote-box:not(.spoiler-box) > blockquote {
margin-top:7px;
margin-left:6px;
-moz-border-radius:8px;
-khtml-border-radius:8px;
-webkit-border-radius:8px;
border-radius:8px;
border:solid 1px #B38000; /*стиль. толщина и цвет рамки блока цитаты*/
background:linear-gradient(180deg, rgba(255, 254, 249, 1) 0%, rgba(253, 252, 206, 1) 100%); /*Фон блока цитаты*/
max-width:91%;
position:relative;
padding:11px 20px 0 17px;
}
.punbb .quote-box:not(.spoiler-box) > blockquote:before {
content:'';
background:url(https://forumstatic.ru/files/0013/61/d9/45308.png) top left no-repeat transparent; /*открывающая кавычка*/
position:absolute;
width:10px;
height:10px;
top:13px;
left:3px;
}
.punbb .quote-box:not(.spoiler-box) > blockquote:after {
content:'';
position:absolute;
z-index:100;
background:url(https://forumstatic.ru/files/0013/61/d9/83565.png) top left no-repeat transparent; /*закрывающая кавычка*/
width:10px;
height:10px;
right:4px;
bottom:4px;
}
.punbb .quote-box:not(.spoiler-box) > cite {
font-style:normal;
font-weight:700;
display:block;
font-size:13px; /*размер шрифта заголовка*/
color:#000; /*цвет шрифта заголовка*/
background:url(https://forumstatic.ru/files/0013/61/d9/36828.png) top left repeat-x transparent;/*средняя часть фона заголовка*/
height:32px;
line-height:24px;
position:absolute;
z-index:100;
top:0;
text-shadow:#fff 1px 1px; /*тень шрифта заголовка*/
left:13px;
}
.punbb .quote-box:not(.spoiler-box) > cite:before {
content:'';
position:absolute;
z-index:-1;
background:url(https://forumstatic.ru/files/0013/61/d9/51191.png) no-repeat 0 0 transparent; /*левая часть фона заголовка*/
width:31px;
height:38px!important;
left:-13px;
top:0;
}
.punbb .quote-box:not(.spoiler-box) > cite:after {
content:'';
background:url(https://forumstatic.ru/files/0013/61/d9/31895.png) no-repeat 0 0 transparent; /*правая часть фона заголовка*/

position:absolute;
right:-10px;
width:10px;
height:32px;
}
</style>

как у Кёрти

#pun-category2 h2 {height: 80px; background-image: url(https://pp.userapi.com/c836431/v836431840/4fbdd/10u6yaxAuEg.jpg); background-repeat: no-repeat; overflow-x: hidden; background-position: top center; color: transparent;}
#pun-category3 h2 {height: 80px; background-image: url(https://pp.userapi.com/c836431/v836431840/4fbe6/05aR2BeKHVg.jpg); background-repeat: no-repeat; overflow-x: hidden; background-position: top center; color: transparent;}
#pun-category4 h2 {height: 80px; background-image: url(https://pp.userapi.com/c836431/v836431840/4fbef/e9gMui_TrVY.jpg); background-repeat: no-repeat; overflow-x: hidden; background-position: top center; color: transparent;}
#pun-category5 h2 {height: 80px; background-image: url(https://pp.userapi.com/c836431/v836431840/4fbf8/dHq6uRW98_c.jpg); background-repeat: no-repeat; overflow-x: hidden; background-position: top center; color: transparent;}
#pun-category6 h2 {height: 80px; background-image: url(https://pp.userapi.com/c836431/v836431840/4fc0a/GEA9302BsjA.jpg); background-repeat: no-repeat; overflow-x: hidden; background-position: top center; color: transparent;}
#pun-category7 h2 {height: 80px; background-image: url(https://pp.userapi.com/c836431/v836431840/4fc13/XCDgPIKCBBc.jpg); background-repeat: no-repeat; overflow-x: hidden; background-position: top center; color: transparent;}
#pun-category8 h2 {height: 80px; background-image: url(http://s9.uploads.ru/2QoCY.png); background-repeat: no-repeat; overflow-x: hidden; background-position: top center; color: transparent;}