diff --git a/Assets/Scenes/main.unity b/Assets/Scenes/main.unity
index 62e3d42..9cfa803 100644
--- a/Assets/Scenes/main.unity
+++ b/Assets/Scenes/main.unity
@@ -3054,6 +3054,7 @@ GameObject:
   - component: {fileID: 441640512}
   - component: {fileID: 441640511}
   - component: {fileID: 441640516}
+  - component: {fileID: 441640517}
   m_Layer: 0
   m_Name: '[Managers]'
   m_TagString: GameController
@@ -3275,6 +3276,20 @@ MonoBehaviour:
   _enableOpeningFlow: 1
   _basketballClip: {fileID: 8300000, guid: 25ff553be9c84452ab0a39fbfd06be77, type: 3}
   _manCallClip: {fileID: 8300000, guid: bc5816d37e79f4461a243f63cd20c925, type: 3}
+--- !u!114 &441640517
+MonoBehaviour:
+  m_ObjectHideFlags: 0
+  m_CorrespondingSourceObject: {fileID: 0}
+  m_PrefabInstance: {fileID: 0}
+  m_PrefabAsset: {fileID: 0}
+  m_GameObject: {fileID: 441640509}
+  m_Enabled: 1
+  m_EditorHideFlags: 0
+  m_Script: {fileID: 11500000, guid: d5a0e43c7217447f9b4be5e2434520e4, type: 3}
+  m_Name: 
+  m_EditorClassIdentifier: 
+  _homeBgClip: {fileID: 0}
+  _experimentBgClip: {fileID: 0}
 --- !u!1 &458363765
 GameObject:
   m_ObjectHideFlags: 0
diff --git a/Assets/Scripts/Audio/BGMController.cs b/Assets/Scripts/Audio/BGMController.cs
new file mode 100644
index 0000000..30c1b8e
--- /dev/null
+++ b/Assets/Scripts/Audio/BGMController.cs
@@ -0,0 +1,54 @@
+using UnityEngine;
+
+/// <summary>
+/// 背景音乐控制器——挂在 [Managers] 上，独立于 PageController。
+/// 静态方法供外部调用。
+/// </summary>
+public class BGMController : MonoBehaviour
+{
+    [SerializeField] private AudioClip _homeBgClip;
+    [SerializeField] private AudioClip _experimentBgClip;
+    private AudioSource _bgSource;
+
+    private static BGMController _instance;
+
+    void Awake()
+    {
+        _instance = this;
+        _bgSource = gameObject.AddComponent<AudioSource>();
+        _bgSource.loop = true;
+        _bgSource.playOnAwake = false;
+        _bgSource.spatialBlend = 0f;
+        _bgSource.volume = 0.5f;
+
+#if UNITY_EDITOR
+        if (_homeBgClip == null) _homeBgClip = UnityEditor.AssetDatabase.LoadAssetAtPath<AudioClip>("Assets/Audio/homeBackgroundMusic.mp3");
+        if (_experimentBgClip == null) _experimentBgClip = UnityEditor.AssetDatabase.LoadAssetAtPath<AudioClip>("Assets/Audio/backgroundMusic.mp3");
+#endif
+        Debug.Log($"[BGMController] 就绪 homeBg={(_homeBgClip!=null)} expBg={(_experimentBgClip!=null)}");
+    }
+
+    public static void PlayHomeBg()
+    {
+        if (_instance == null || _instance._homeBgClip == null) { Debug.LogWarning("[BGMController] PlayHomeBg 失败"); return; }
+        _instance._bgSource.clip = _instance._homeBgClip;
+        _instance._bgSource.volume = 0.5f;
+        _instance._bgSource.Play();
+        Debug.Log($"[BGMController] 播放首页bg isPlaying={_instance._bgSource.isPlaying}");
+    }
+
+    public static void PlayExperimentBg()
+    {
+        if (_instance == null || _instance._experimentBgClip == null) { Debug.LogWarning("[BGMController] PlayExperimentBg 失败"); return; }
+        _instance._bgSource.clip = _instance._experimentBgClip;
+        _instance._bgSource.volume = 0.5f;
+        _instance._bgSource.Play();
+        Debug.Log($"[BGMController] 播放实验bg isPlaying={_instance._bgSource.isPlaying}");
+    }
+
+    public static void StopBgMusic()
+    {
+        if (_instance != null) _instance._bgSource.Stop();
+        Debug.Log("[BGMController] 停止bg");
+    }
+}
diff --git a/Assets/Scripts/Audio/BGMController.cs.meta b/Assets/Scripts/Audio/BGMController.cs.meta
new file mode 100644
index 0000000..5b1007b
--- /dev/null
+++ b/Assets/Scripts/Audio/BGMController.cs.meta
@@ -0,0 +1,11 @@
+fileFormatVersion: 2
+guid: d5a0e43c7217447f9b4be5e2434520e4
+MonoImporter:
+  externalObjects: {}
+  serializedVersion: 2
+  defaultReferences: []
+  executionOrder: 0
+  icon: {instanceID: 0}
+  userData: 
+  assetBundleName: 
+  assetBundleVariant: 
diff --git a/Assets/Scripts/UI/PageController.cs b/Assets/Scripts/UI/PageController.cs
index 2f9363c..e193840 100644
--- a/Assets/Scripts/UI/PageController.cs
+++ b/Assets/Scripts/UI/PageController.cs
@@ -128,8 +128,8 @@ public class PageController : MonoBehaviour
 
         if (_uiManager != null)
             _uiManager.enabled = (page == Page.Experiment);
-        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();
+        if (page == Page.Home) BGMController.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) BGMController.PlayHomeBg();
         Debug.Log($"PageController（编辑器预览）: 切换到 [{page}]");
     }
 #endif
@@ -231,7 +231,7 @@ public class PageController : MonoBehaviour
         Debug.Log($"PageController: GameManager 已设置 Mode=[{gm.CurrentMode}] Fixation=[{gm.CurrentFixationMethod}]");
 
         // 隐藏所有UI面板，准备播放片头动画
-        StopBgMusic();
+        BGMController.StopBgMusic();
         HideAllPages();
 
         // 找到 OpeningFlowController 播放片头动画