diff --git a/public/assets/js/backend/oa/doc.js b/public/assets/js/backend/oa/doc.js
index 609c08a..d28accd 100644
--- a/public/assets/js/backend/oa/doc.js
+++ b/public/assets/js/backend/oa/doc.js
@@ -86,6 +86,40 @@ define(['jquery', 'bootstrap', 'backend', 'table', 'form'], function ($, undefin
             Controller.api.bindevent();
         },
         edit: function () {
+
+            $(document).on('click', '.btn-preview', function (e) {
+                e.preventDefault();
+                var fileType = $(this).data('filetype'); // 自动从 data-type 获取，比如 pdf, jpg, doc
+                var fileUrl = $(this).data('fileurl');
+
+                if (fileType === 'pdf') {
+                    Layer.open({
+                        type: 2,
+                        title: '预览PDF文件',
+                        area: ['80%', '80%'],
+                        content: fileUrl
+                    });
+                } else if (['jpg', 'jpeg', 'png', 'gif', 'webp'].includes(fileType)) {
+                    Layer.photos({
+                        photos: {
+                            "title": "图片预览",
+                            "data": [{"src": fileUrl}]
+                        },
+                        anim: 5
+                    });
+                } else if (['mp4', 'webm', 'ogg'].includes(fileType)) {
+                    Layer.open({
+                        type: 1,
+                        title: '视频预览',
+                        area: ['800px', '500px'],
+                        content: `<video src="${fileUrl}" width="100%" height="100%" controls autoplay></video>`
+                    });
+                } else {
+                    window.open(fileUrl, '_blank');
+                }
+            });
+
+
             Controller.api.bindevent();
         },
         api: {