최신글 부분 질문좀드리겠습니다.

<?php
if (!defined('_GNUBOARD_')) exit; // 개별 페이지 접근 불가

// add_stylesheet('css 구문', 출력순서); 숫자가 작을 수록 먼저 출력됨
include_once(G5_LIB_PATH.'/thumbnail.lib.php');
add_stylesheet('<link rel="stylesheet" href="'.$latest_skin_url.'/style.css">', 0);
?>
<style>


/* 최근게시물 스킨 (latest) */
.lt1 {position:relative;width: 850px;
    margin: auto;}
.lt1 #gall_ul {margin:10px 0 0;padding:0;list-style:none;padding-top:20px; border-bottom: 2px solid #df2867; border-top: 2px solid #df2867;}
.lt1 #gall_ul:after {display:block;visibility:hidden;clear:both;content:""}
.lt1 .gall_li {float: left;
    width: 25%;
    position: relative;
    min-height: 1px;
    padding-left: 5px;
    *padding-left: 0;
    padding-right: 5px;
    *padding-right: 0;
    float: left;
    -webkit-box-sizing: border-box;
    -moz-box-sizing: border-box;
    box-sizing: border-box;
    margin-left: 0; }

 .lt1 .gall_li_wr{background:#fff;position:relative; margin: 0 0 10px 0; text-align: center;}
.lt1 .gall_li_chk{display:inline-block;padding:5px;position:absolute;top:0;left:0}
 .lt1 .gall_li .gall_img img{width:100%;height:auto}
.lt1 .gall_li .gall_img .no-img{display:block;background:#ddd;text-align:center;padding:30% 0}
.lt1 .gall_li_wr{background:#fff;position:relative;}
.lt1 .gall_text_href {padding:10px;display:block}
.lt1 .gall_info{padding:5px 0 0;margin:10px 0 0 ;color: #666;border-top:1px solid #eee;}
.lt1 .gall_info:after {display:block;visibility:hidden;clear:both;content:""} 
.lt1 .gall_info strong{display:inline-block;margin-right:3px}
.lt1 .gall_li_tit{font-family: "Noto Sans KR",sans-serif;
    font-weight: bold;
    font-size: 18px;}
.lt .date{float:right;color:#666;font-style:italic}

.tx_box {margin: auto;width:100%;}

@media screen and (max-width:1200px) {
    .gall_img img { width: 100% !important; }
      
}
@media screen and (max-width:1000px) {
.lt1 {position:relative;width:100%}
 }


@media screen and (max-width:700px) {
.lt1 .gall_li {float:left;;width:33.3%;padding:5px}


}

@media screen and (max-width:600px) {
.lt1 .gall_li {float:left;;width:50%;padding:5px}

 .lt1 .gall_li_tit{font-family: "Noto Sans KR",sans-serif;
    font-weight: bold;
    font-size: 14px;}
}

</style>
<div class="lt1">
 
 <div class="tx_box">
 <img src="http://poniya.speedgabia.com/lglg.PNG" style="width:100%;">
     </div>
     <ul id="gall_ul">
    <?php for ($i=0; $i<count($list); $i++) { ?>
        <li class="gall_li ">
            <div class="gall_li_wr">

            <?php
            echo "<a href=\"".$list[$i]['href']."\" class='gall_img'>";
                            $thumb = get_list_thumbnail($board['bo_table'], $list[$i]['wr_id'], $board['height:250px;'], $board['bo_gallery_height'], false, true);

            if($thumb['src']) {
                $img_content = '<img src="'.$thumb['src'].'">';
            } else {
                $img_content = '<img src="'.G5_URL.'/img/no_img.png">';
            }
                echo $img_content;
                echo "</a>";
            ?>
            
                <div class="gall_text_href">

                    <a href="<?php echo $list[$i]['href'] ?>" class="gall_li_tit">
                        <?php echo $list[$i]['subject'] ?>
                    </a>
                     
                     
                </div>
            </div>
        </li>
    <?php } ?>
    <?php if (count($list) == 0) { //게시물이 없을 때 ?>
    <li class="empty_li">게시물이 없습니다.</li>
    <?php } ?>
    </ul>
</div>