排版

src/components/PreviewGrid.tsx

@@ -699,7 +699,7 @@ export const LayoutPreview: React.FC<LayoutPreviewProps> = ({
       >
         {!previewReady ? (
           <div className="h-full flex flex-col items-center justify-center text-center px-6 gap-2">
-            <p className="text-sm text-[#aaa]">上传数据源并完成变量映射后</p>
+            <p className="text-sm text-[#aaa]">请先在右侧「数据源」中添加数据源后生成排版预览</p>
             <p className="text-xs text-[#666] max-w-[280px] leading-relaxed">
               {isMobileVariant
                 ? '在下方「数据源」中上传 Excel，预览将自动更新'