diff --git a/app/Blog/Services/PostContentRenderer.php b/app/Blog/Services/PostContentRenderer.php
index c01a381..55479ba 100644
--- a/app/Blog/Services/PostContentRenderer.php
+++ b/app/Blog/Services/PostContentRenderer.php
@@ -137,7 +137,9 @@ class PostContentRenderer
                 continue;
             }
 
-            $replacement = $type === 'img'
+            // 老 sablog 的 [attach=xx] 对图片附件就是直接贴图，mime 是图片时用 <img>
+            $isImage = str_starts_with((string) $media->mime_type, 'image/');
+            $replacement = $type === 'img' || $isImage
                 ? sprintf('<img src="%s" alt="%s" loading="lazy" />', $media->getUrl(), e($media->name))
                 : sprintf('<a href="%s">%s</a>', $media->getUrl(), e($media->file_name));