first commit 2

rb/rb.mod/banner/skin/image_only/banner.skin.php

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+<?php
+if (!defined('_GNUBOARD_')) exit;
+/**
+ * rb.mod.banner :: image_only/banner.skin.php
+ * 배너 그룹 스킨 (래퍼)
+ */
+
+// CSS 로드
+
+
+// 배너 목록이 있으면 루프를 돌며 skin.php를 include
+if (isset($banners) && is_array($banners)) {
+    foreach ($banners as $banner) {
+        include(dirname(__FILE__).'/skin.php');
+    }
+} else if (isset($banner)) {
+    // 단일 배너인 경우
+    include(dirname(__FILE__).'/skin.php');
+}
+?>

rb/rb.mod/banner/skin/image_only/skin.php

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+<?php
+if (!defined('_GNUBOARD_')) exit;
+/**
+ * rb.mod.banner :: image_only/skin.php
+ * 단일 배너 아이템 스킨 (이미지만 출력)
+ */
+
+// 💡 [핵심 수정] 이 스킨의 CSS 파일을 불러옵니다.
+//add_stylesheet('<link rel="stylesheet" href="'.G5_URL.'/rb/rb.mod/banner/skin/image_only/style.css?ver='.G5_SERVER_TIME.'">', 0);
+
+?>
+
+<link rel="stylesheet" href="<?php echo G5_URL; ?>/rb/rb.mod/banner/skin/image_only/style.css?ver=<?php echo G5_SERVER_TIME; ?>">
+<div class="rb-banner-image-only">
+    <a href="<?php echo $banner['bn_url']; ?>" 
+       target="_<?php echo $banner['bn_new_win'] ? 'blank' : 'self'; ?>"
+       onclick="banner_click_count(this); return true;"
+       data-banner-id="<?php echo $banner['bn_id']; ?>">
+        <div class="banner-image">
+            <?php echo $banner['bn_img']; ?>
+        </div>
+    </a>
+</div>

rb/rb.mod/banner/skin/image_only/style.css

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+/* Image Only Banner Skin - Final Fix */
+
+/* 💡 [핵심] 부모(.banner-unit-wrapper)의 공간을 100% 채우도록 강제 */
+.rb-banner-image-only {
+    position: absolute;
+    top: 0;
+    left: 0;
+    width: 100%;
+    height: 100%;
+}
+
+.rb-banner-image-only a,
+.rb-banner-image-only .banner-image {
+    display: flex;
+    justify-content: center;
+    align-items: center;
+    width: 100%;
+    height: 100%;
+}
+
+.rb-banner-image-only img {
+    width: 100%;
+    height: 100%;
+    object-fit: fill;
+    max-height: 85px;
+}