diff --git a/Assets/Scripts/UI/PageController.cs b/Assets/Scripts/UI/PageController.cs
index c161f7c..625ecb9 100644
--- a/Assets/Scripts/UI/PageController.cs
+++ b/Assets/Scripts/UI/PageController.cs
@@ -53,6 +53,7 @@ public class PageController : MonoBehaviour
         _bgAudioSource = gameObject.AddComponent<AudioSource>();
         _bgAudioSource.loop = true;
         _bgAudioSource.playOnAwake = false;
+        _bgAudioSource.spatialBlend = 0f;
 
         // 绑定首页按钮
         if (_btnStart != null) { _btnStart.onClick.AddListener(OnStartClicked); Debug.Log("PageController: _btnStart 绑定成功"); }
@@ -328,7 +329,8 @@ public class PageController : MonoBehaviour
             _homeBgClip = UnityEditor.AssetDatabase.LoadAssetAtPath<AudioClip>("Assets/Audio/homeBackgroundMusic.mp3");
 #endif
             if (_homeBgClip == null) return; }
-        if (_bgAudioSource == null) { _bgAudioSource = gameObject.AddComponent<AudioSource>(); _bgAudioSource.loop = true; _bgAudioSource.playOnAwake = false; }
+        if (_bgAudioSource == null) { _bgAudioSource = gameObject.AddComponent<AudioSource>(); _bgAudioSource.loop = true; _bgAudioSource.playOnAwake = false;
+        _bgAudioSource.spatialBlend = 0f; }
         _bgAudioSource.enabled = true;
         _bgAudioSource.clip = _homeBgClip;
         _bgAudioSource.volume = 0f;
@@ -360,7 +362,8 @@ public class PageController : MonoBehaviour
             _experimentBgClip = UnityEditor.AssetDatabase.LoadAssetAtPath<AudioClip>("Assets/Audio/backgroundMusic.mp3");
 #endif
             if (_experimentBgClip == null) return; }
-        if (_bgAudioSource == null) { _bgAudioSource = gameObject.AddComponent<AudioSource>(); _bgAudioSource.loop = true; _bgAudioSource.playOnAwake = false; }
+        if (_bgAudioSource == null) { _bgAudioSource = gameObject.AddComponent<AudioSource>(); _bgAudioSource.loop = true; _bgAudioSource.playOnAwake = false;
+        _bgAudioSource.spatialBlend = 0f; }
         _bgAudioSource.enabled = true;
         _bgAudioSource.clip = _experimentBgClip;
         _bgAudioSource.volume = 0f;
@@ -374,6 +377,7 @@ public class PageController : MonoBehaviour
     {
         if (_bgAudioSource == null) yield break;
         float targetVolume = _bgAudioSource.volume > 0.01f ? _bgAudioSource.volume : 0.5f;
+        Debug.Log("PageController: FadeInBg 目标音量=" + targetVolume + " spatialBlend=" + _bgAudioSource.spatialBlend);
         _bgAudioSource.volume = 0f;
         float elapsed = 0f;
         while (elapsed < duration)