diff --git a/Assets/Scripts/Interaction/TouchPositionHandler.cs b/Assets/Scripts/Interaction/TouchPositionHandler.cs
index ea838f5..5bb9c76 100644
--- a/Assets/Scripts/Interaction/TouchPositionHandler.cs
+++ b/Assets/Scripts/Interaction/TouchPositionHandler.cs
@@ -49,7 +49,7 @@ public class TouchPositionHandler : MonoBehaviour
 
         if (voiceClip != null)
         {
-            AudioSource.PlayClipAtPoint(voiceClip, transform.position);
+            PlaySharedVoice();
             Debug.Log($"[TouchPosition] 播放语音: {voiceClip.name}");
         }
 
@@ -67,4 +67,20 @@ public class TouchPositionHandler : MonoBehaviour
             Debug.Log($"[TouchPosition] {name} → {nextTouchObject.name} 显示");
         }
     }
+
+    private static AudioSource _sharedVoice;
+
+    private void PlaySharedVoice()
+    {
+        if (voiceClip == null) return;
+        if (_sharedVoice == null)
+        {
+            var go = GameObject.Find("[Managers]");
+            if (go != null) _sharedVoice = go.AddComponent<AudioSource>();
+            else { var g = new GameObject("SharedVoice"); _sharedVoice = g.AddComponent<AudioSource>(); }
+        }
+        _sharedVoice.Stop();
+        _sharedVoice.clip = voiceClip;
+        _sharedVoice.Play();
+    }
 }
diff --git a/Assets/Scripts/UI/PageController.cs b/Assets/Scripts/UI/PageController.cs
index 297b699..b5339d7 100644
--- a/Assets/Scripts/UI/PageController.cs
+++ b/Assets/Scripts/UI/PageController.cs
@@ -122,7 +122,7 @@ public class PageController : MonoBehaviour
 
         if (_uiManager != null)
             _uiManager.enabled = (page == Page.Experiment);
-        // 背景音乐: 首页播 homeBg, 选固定方式时停, 实验启动时播 experimentBg
+        if (page == Page.Home) PlayHomeBg();        // 背景音乐: 首页播 homeBg, 选固定方式时停, 实验启动时播 experimentBg
         if (page == Page.Home) PlayHomeBg();
         Debug.Log($"PageController（编辑器预览）: 切换到 [{page}]");
     }
@@ -140,38 +140,6 @@ public class PageController : MonoBehaviour
         if (_fixationPanel != null) _fixationPanel.SetActive(page == Page.Fixation);
         if (_experimentPanel != null) _experimentPanel.SetActive(page == Page.Experiment);
 
-        if (_uiManager != null) _uiManager.enabled = (page == Page.Experiment);
-        // 背景音乐: 首页播 homeBg, 选固定方式时停, 实验启动时播 experimentBg
-    }
-
-    private void PlayHomeBg()
-    {
-        if (_homeBgClip != null && _bgAudioSource != null)
-        {
-            _bgAudioSource.clip = _homeBgClip;
-            _bgAudioSource.Play();
-            Debug.Log("PageController: 播放首页背景音乐");
-        }
-    }
-
-    private void StopBgMusic()
-    {
-        if (_bgAudioSource != null && _bgAudioSource.isPlaying)
-        {
-            _bgAudioSource.Stop();
-            Debug.Log("PageController: 停止背景音乐");
-        }
-    }
-
-    private void PlayExperimentBg()
-    {
-        StopBgMusic();
-        if (_experimentBgClip != null && _bgAudioSource != null)
-        {
-            _bgAudioSource.clip = _experimentBgClip;
-            _bgAudioSource.Play();
-            Debug.Log("PageController: 播放实验背景音乐");
-        }
     }
 
     /// <summary>
@@ -351,4 +319,49 @@ public class PageController : MonoBehaviour
     [SerializeField] private AudioClip _experimentBgClip;
     [SerializeField] private AudioClip[] _womanClips;
     private AudioSource _bgAudioSource;
+
+    private void PlayHomeBg()
+    {
+        if (_homeBgClip == null) return;
+        if (_bgAudioSource == null) { _bgAudioSource = gameObject.AddComponent<AudioSource>(); _bgAudioSource.loop = true; _bgAudioSource.playOnAwake = false; }
+        _bgAudioSource.clip = _homeBgClip;
+        _bgAudioSource.Play();
+        StartCoroutine(FadeInBg());
+        Debug.Log("PageController: 播放首页背景音乐");
+    }
+
+    private void StopBgMusic()
+    {
+        if (_bgAudioSource != null && _bgAudioSource.isPlaying)
+        {
+            _bgAudioSource.Stop();
+            Debug.Log("PageController: 停止背景音乐");
+        }
+    }
+
+    private void PlayExperimentBg()
+    {
+        StopBgMusic();
+        if (_experimentBgClip == null) return;
+        if (_bgAudioSource == null) { _bgAudioSource = gameObject.AddComponent<AudioSource>(); _bgAudioSource.loop = true; _bgAudioSource.playOnAwake = false; }
+        _bgAudioSource.clip = _experimentBgClip;
+        _bgAudioSource.Play();
+        StartCoroutine(FadeInBg());
+        Debug.Log("PageController: 播放实验背景音乐");
+    }
+
+    private System.Collections.IEnumerator FadeInBg(float duration = 1.5f)
+    {
+        if (_bgAudioSource == null) yield break;
+        float targetVolume = _bgAudioSource.volume > 0.01f ? _bgAudioSource.volume : 0.5f;
+        _bgAudioSource.volume = 0f;
+        float elapsed = 0f;
+        while (elapsed < duration)
+        {
+            elapsed += Time.deltaTime;
+            if (_bgAudioSource != null) _bgAudioSource.volume = Mathf.Lerp(0f, targetVolume, elapsed / duration);
+            yield return null;
+        }
+        if (_bgAudioSource != null) _bgAudioSource.volume = targetVolume;
+    }
 }