diff --git a/App/main.cpp b/App/main.cpp
index b221b4e..a159d8c 100644
--- a/App/main.cpp
+++ b/App/main.cpp
@@ -101,7 +101,12 @@ protected:
 
     void OnUpdate(f32 deltaTime) override
     {
-        m_Time += deltaTime;
+        // 暂停时冻结动画时钟（帧历史验证：暂停后 Temporal Diff
+        // 视图应在 2 帧内整屏变黑；相机移动同样会被 diff 捕捉到）
+        if (!m_PauseAnim)
+        {
+            m_Time += deltaTime;
+        }
 
         // 相机（WASD/Space/Shift 移动）
         m_Camera.GetComponent<CameraComponent>()
@@ -172,6 +177,7 @@ protected:
         {
             renderer.SetShowTemporalDiff(temporalDiff);
         }
+        ImGui::Checkbox("Pause Animation", &m_PauseAnim);
 
         // Pass 级 GPU 耗时（RG timestamp）
         ImGui::Separator();
@@ -286,6 +292,7 @@ private:
     EntityHandle m_KeyLight{};
     std::vector<EntityHandle> m_Spinners;
     f32 m_Time = 0.0f;
+    bool m_PauseAnim = false;   // 冻结动画时钟（帧历史 diff 验证用）
 };
 
 int main()