diff --git a/index.html b/index.html
index 21c01f8..d1ab187 100644
--- a/index.html
+++ b/index.html
@@ -1152,14 +1152,20 @@
                 if (typeof navigator.mediaSession.setPositionState !== 'function') return;
                 const audio = audioRef.current;
                 if (!audio) return;
+                
                 const duration = resolveDurationSeconds(audio, currentSongRef.current);
+                
+                // 兼容性修复：duration 必须为正有限数，否则某些浏览器（如 Firefox）会隐藏通知栏或报错
+                if (!Number.isFinite(duration) || duration <= 0) return;
+
                 const position = Number.isFinite(audio.currentTime) ? audio.currentTime : 0;
                 const playbackRate = Number.isFinite(audio.playbackRate) ? audio.playbackRate : 1;
+                
                 try {
                     navigator.mediaSession.setPositionState({
                         duration: duration,
                         playbackRate: playbackRate,
-                        position: duration > 0 ? Math.min(position, duration) : position
+                        position: Math.min(position, duration)
                     });
                 } catch (e) {}
             };
@@ -1245,10 +1251,10 @@
                         ]
                     });
                     // Reset position state when song changes
-                    try { navigator.mediaSession.setPositionState({ duration: 0, playbackRate: 1, position: 0 }); } catch(e) {}
+                    // 注意：不要调用 setPositionState({ duration: 0 })，因为规范要求 duration 必须为正数
+                    // 错误的调用可能导致 Firefox 等浏览器隐藏播放控件
                 } else {
                     navigator.mediaSession.metadata = null;
-                    try { navigator.mediaSession.setPositionState({ duration: 0, playbackRate: 1, position: 0 }); } catch(e) {}
                 }
             }, [currentSong]);