diff --git a/frontend-web/src/pages/deep-research/WorkflowConfigDialog.tsx b/frontend-web/src/pages/deep-research/WorkflowConfigDialog.tsx
index 6af9c7bb..33cc7d4a 100644
--- a/frontend-web/src/pages/deep-research/WorkflowConfigDialog.tsx
+++ b/frontend-web/src/pages/deep-research/WorkflowConfigDialog.tsx
@@ -77,6 +77,7 @@ import {
 } from "@/strategy-components/api/report-structures";
 import { useSkills } from "@/core/skills/hooks";
 import { desensitize } from "@/lib/desensitize";
+import { cn } from "@/lib/utils";
 
 // ── shared helpers ───────────────────────────────────────────────────────────
 
@@ -1213,12 +1214,16 @@ export function WorkflowConfigButton({
     return structuresQuery.data?.find((structure) => structure.content.trim() === content)?.title ?? null;
   }, [appliedContent, structuresQuery.data]);
   const buttonLabel = selectedWorkflowTitle || "工作流配置";
+  const isSelected = Boolean(selectedWorkflowTitle);
 
   return (
     <>
       <Button
         aria-label={selectedWorkflowTitle ? `已选择工作流：${selectedWorkflowTitle}` : "工作流配置"}
-        className={className}
+        className={cn(
+          className,
+          isSelected && "bg-accent text-accent-foreground dark:bg-accent/50",
+        )}
         disabled={disabled}
         onClick={() => setOpen(true)}
         size={size}