diff --git a/src/main/capabilities/vision.ts b/src/main/capabilities/vision.ts
index ba4ee00..a8e893b 100644
--- a/src/main/capabilities/vision.ts
+++ b/src/main/capabilities/vision.ts
@@ -407,6 +407,10 @@ async function locate(args: Record<string, unknown>, evidenceDir: string, nodeId
     offsetY = phys.y;
   } else {
     await fs.writeFile(screenshot, PNG.sync.write(shot.png));
+    // 拼接画布坐标 → 屏幕物理坐标必须加回画布原点(副屏在主屏左侧/上方时原点为负);
+    // 漏加会导致点击偏移(实测副屏上移 177px 时点击正好偏下 177px)
+    offsetX = shot.originX;
+    offsetY = shot.originY;
   }
 
   // accuracy 字段语义为「相似度」(0~1, 越大越严格, 0.9=至少90%像素一致)——与界面文案一致。