메인에 최근 게시물 갤러리 노출시에 여백을 없앨려면?

어떻게 해야하나요?

<?php
if (!defined('_GNUBOARD_')) exit; // 개별 페이지 접근 불가
include_once(G5_LIB_PATH.'/thumbnail.lib.php');

$imgwidth = 320; //표시할 이미지의 가로사이즈
$imgheight = 300; //표시할 이미지의 세로사이즈
?>

<style>
#oneshot { position:relative;background-color: transparent;margin:0px;}
#oneshot .la_title{position:absolute; left:0; top:0; z-index:100; background:#000; padding:5px; font-size:1em; color:#fff;margin:0 0 0 5px;filter:alpha(opacity=50);opacity:.5;}
#oneshot .img_set{width:<?php echo $imgwidth ?>px;  padding:0px;margin:5px;padding-top:10px; }
#oneshot .subject_set{width:<?php echo $imgwidth - 13 ?>px; height:0px; padding:0px; z-index:1; bottom:0; left:0;;}
#oneshot .subject_set .sub_title{color:#333;line-height:10px;overflow:hidden;padding:5px 0 0 0;margin:0px;font-size:1.2em;font-family:NanumBarunGothic,dotum;}

#oneshot ul {list-style:none;clear:both;margin:0;padding:0;}
#oneshot li{float:left;list-style:none;text-decoration:none;padding:23px 0px 0px 0px;}
.subject_set  a:link, a:visited {color:#333;text-decoration:none;}
.subject_set  a:hover, a:focus, a:active {color:#e60012;text-decoration:none}

</style>
<div id="oneshot">
 <ul>
 <?php for ($i=0; $i<count($list); $i++) { ?> 
  <li>
   <div class="img_set">
    <a href="<?php echo $list[$i]['href'] ?>">
     <?php               
     $thumb = get_list_thumbnail($bo_table, $list[$i]['wr_id'], $imgwidth, $imgheight);                    
     if($thumb['src']) {
     $img_content = '<img class="img_left" src="'.$thumb['src'].'" alt="'.$list[$i]['subject'].'" width="'.$imgwidth.'" height="'.$imgheight.'">';
     } else {
     $img_content = 'NO IMAGE';
     }               
     echo $img_content;                          
     ?>
    </a>
   </div>
   <div >
    <div class="sub_title"  style="text-align:center;"><a href="<?php echo $list[$i]['href'] ?>"><?php echo cut_str($list[$i]['subject'], 23, "..") ?></a></div>
    <!--<div class="sub_content"><?php echo get_text(cut_str(strip_tags($list[$i][wr_content]), 65, '...' )) ?></div>-->
   </div>
  </li>
 <?php } ?>
 </ul>
</div>