调整

app/views/admins/carousels/shared/_add_carousel_modal.html.erb

@@ -14,7 +14,7 @@
               <div class="input-group-prepend">
                 <span class="input-group-text">图片</span>
               </div>
-              <div class="custom-file flex-row-reverse">
+              <div class="custom-file flex-row-reverse" style="overflow: hidden">
                 <input type="file" name="portal_image[image]" class="img-file-input" id="img-file-input" accept="image/*">
                 <label class="custom-file-label file-names" for="img-file-input">选择文件</label>
               </div>