diff --git a/apps/desktop/src/pages/tools/BatchThumbnailGenerator.tsx b/apps/desktop/src/pages/tools/BatchThumbnailGenerator.tsx
index 8f7ec29..1fdf40a 100644
--- a/apps/desktop/src/pages/tools/BatchThumbnailGenerator.tsx
+++ b/apps/desktop/src/pages/tools/BatchThumbnailGenerator.tsx
@@ -318,9 +318,9 @@ const BatchThumbnailGenerator: React.FC = () => {
                     <button
                       onClick={handleSelectFolder}
                       disabled={isScanning}
-                      className="btn-primary flex items-center gap-2"
+                      className="btn btn-primary"
                     >
-                      <FolderOpen className="w-4 h-4" />
+                      <FolderOpen className="w-4 h-4 flex-shrink-0" />
                       {isScanning ? '扫描中...' : '选择文件夹'}
                     </button>
                     
@@ -377,7 +377,7 @@ const BatchThumbnailGenerator: React.FC = () => {
                 <button
                   onClick={handleStartGeneration}
                   disabled={isGenerating || selectedVideos.length === 0}
-                  className="btn-primary flex items-center gap-2"
+                  className="btn btn-primary"
                 >
                   <Play className="w-4 h-4" />
                   {isGenerating ? '生成中...' : '开始生成'}
@@ -386,7 +386,7 @@ const BatchThumbnailGenerator: React.FC = () => {
                 <button
                   onClick={handleScanAndGenerate}
                   disabled={isGenerating || !selectedFolder}
-                  className="btn-secondary flex items-center gap-2"
+                  className="btn btn-secondary"
                 >
                   <RefreshCw className="w-4 h-4" />
                   扫描并生成