diff --git a/lib/pages/player/comments_auth.dart b/lib/pages/player/comments_auth.dart
new file mode 100644
index 0000000..c1178bc
--- /dev/null
+++ b/lib/pages/player/comments_auth.dart
@@ -0,0 +1,24 @@
+// Author: fruit.com.cn
+
+import 'package:flutter/material.dart';
+import 'package:provider/provider.dart';
+
+import '../../core/data/models/drama.dart';
+import '../../core/data/services/auth_controller.dart';
+import '../../core/widgets/auth_gate.dart';
+
+/// 评论入口统一登录闸：登录成功且页面仍存在时再打开评论面板。
+Future<void> openCommentsWithAuth(
+  BuildContext context,
+  Drama drama, {
+  required Future<void> Function(BuildContext context, Drama drama) show,
+}) async {
+  final auth = context.read<AuthController>();
+  if (auth.isSignedIn) {
+    await show(context, drama);
+    return;
+  }
+  await ensureSignedIn(context);
+  if (!context.mounted || !auth.isSignedIn) return;
+  await show(context, drama);
+}
diff --git a/lib/pages/player/player_view.dart b/lib/pages/player/player_view.dart
index c08ab0a..b03546d 100644
--- a/lib/pages/player/player_view.dart
+++ b/lib/pages/player/player_view.dart
@@ -22,6 +22,7 @@ import '../../core/widgets/auth_gate.dart';
 import '../../core/widgets/download_action.dart';
 import '../../core/widgets/remote_image.dart';
 import '../../l10n/app_localizations.dart';
+import 'comments_auth.dart';
 import 'player_binding.dart';
 import 'player_logic.dart';
 import 'widgets/home_feed_header.dart';
@@ -454,7 +455,9 @@ class _PlayerPageState extends State<PlayerPage> with WidgetsBindingObserver {
                 );
               }
             },
-            onComments: () => logic.showComments(context, drama),
+            onComments: () => unawaited(
+              openCommentsWithAuth(context, drama, show: logic.showComments),
+            ),
             onShare: () => logic.shareDrama(context, drama),
             onDetail: () => unawaited(logic.openDetail(context)),
             onOpenFullPlayer: () async {
@@ -498,7 +501,9 @@ class _PlayerPageState extends State<PlayerPage> with WidgetsBindingObserver {
               onDetail: () => unawaited(logic.openDetail(context)),
               onSpeed: () => unawaited(_openSpeedSheet(context)),
               onEpisodes: () => logic.showEpisodes(context),
-              onComments: () => logic.showComments(context, drama),
+              onComments: () => unawaited(
+                openCommentsWithAuth(context, drama, show: logic.showComments),
+              ),
               onLike: () =>
                   unawaited(_toggleLike(context, interactions, drama)),
               onSave: () => unawaited(_toggleSave(context, drama)),
diff --git a/test/player/player_fullscreen_test.dart b/test/player/player_fullscreen_test.dart
index 92896d9..2e17534 100644
--- a/test/player/player_fullscreen_test.dart
+++ b/test/player/player_fullscreen_test.dart
@@ -69,6 +69,34 @@ void main() {
     );
   });
 
+  testWidgets('should_gate_comments_before_opening_sheet_when_signed_out', (
+    tester,
+  ) async {
+    await _pumpApp(tester);
+    await _openSeriesPlayer(tester);
+
+    await tester.tap(find.byKey(const Key('player-rail-comments')));
+    await tester.pumpAndSettle();
+
+    expect(find.text('Sign in to continue'), findsOneWidget);
+    expect(find.byKey(const Key('player-comments-sheet')), findsNothing);
+  });
+
+  testWidgets('should_open_feed_comments_when_signed_in', (tester) async {
+    SharedPreferencesAsyncPlatform.instance =
+        InMemorySharedPreferencesAsync.withData({
+          'auth.accessToken': 'access',
+          'auth.refreshToken': 'refresh',
+          'auth.user': '{"uid":"9","nickname":"Viewer","avatarUrl":""}',
+        });
+    await _pumpApp(tester);
+
+    await tester.tap(find.byKey(const Key('rail-comments')));
+    await tester.pumpAndSettle();
+
+    expect(find.byKey(const Key('player-comments-sheet')), findsOneWidget);
+  });
+
   testWidgets('should_show_center_toggle_only_when_paused', (tester) async {
     await _pumpApp(tester);
     await _openSeriesPlayer(tester);