diff --git a/src/app/(main)/report/page.tsx b/src/app/(main)/report/page.tsx
index 5c01e36..95540de 100644
--- a/src/app/(main)/report/page.tsx
+++ b/src/app/(main)/report/page.tsx
@@ -143,7 +143,16 @@ export default function ReportPage() {
     setDynamicOptions({});
   }, [selectedReportId]);
 
+  // React 18 Strict Mode (dev) mounts → unmounts → remounts, so effects with [] run twice.
+  // Dedupe PAGE_VIEW within a short window so 進入頁面次數 is +1 per real visit.
   useEffect(() => {
+    if (typeof window === "undefined") return;
+    const w = window as Window & { __fpsmsReportPageViewLoggedAt?: number };
+    const now = Date.now();
+    if (w.__fpsmsReportPageViewLoggedAt != null && now - w.__fpsmsReportPageViewLoggedAt < 2000) {
+      return;
+    }
+    w.__fpsmsReportPageViewLoggedAt = now;
     logFeatureUsage(FEATURE_USAGE.REPORT_MANAGEMENT, FEATURE_USAGE_ACTION.PAGE_VIEW);
   }, []);