diff --git a/admin/src/api/videos.js b/admin/src/api/videos.js
index a33a63e..4be4ddf 100644
--- a/admin/src/api/videos.js
+++ b/admin/src/api/videos.js
@@ -25,3 +25,8 @@ export function offlineVideo(videoId, data) {
 export function updateVideo(videoId, data) {
   return request.put(`/admin/videos/${videoId}`, data)
 }
+
+/** 删除视频（级联删除所有关联数据：标签/点赞/收藏/评论/观看记录/收益/举报） */
+export function deleteVideo(videoId) {
+  return request.delete(`/admin/videos/${videoId}`)
+}
diff --git a/admin/src/views/VideoList.vue b/admin/src/views/VideoList.vue
index 7ddddc7..62560fc 100644
--- a/admin/src/views/VideoList.vue
+++ b/admin/src/views/VideoList.vue
@@ -43,6 +43,7 @@
           <el-button v-if="row.status === 2" link type="danger" :icon="Delete" @click="offline(row)">
             下架
           </el-button>
+          <el-button link type="danger" :icon="Delete" @click="deleteVideoRow(row)">删除</el-button>
         </template>
       </el-table-column>
       <template #empty><el-empty description="暂无视频" /></template>
@@ -108,11 +109,11 @@
 
 <script setup>
 import { Delete, Edit, Refresh, Search, View } from '@element-plus/icons-vue'
-import { ElMessage } from 'element-plus'
+import { ElMessage, ElMessageBox } from 'element-plus'
 import { onMounted, reactive, ref } from 'vue'
 
 import request from '@/api/request'
-import { listVideos, offlineVideo, updateVideo } from '@/api/videos'
+import { listVideos, offlineVideo, updateVideo, deleteVideo } from '@/api/videos'
 import VideoPreview from '@/components/VideoPreview.vue'
 import { askReason } from '@/utils/reason'
 
@@ -199,6 +200,19 @@ async function offline(row) {
   load()
 }
 
+async function deleteVideoRow(row) {
+  try {
+    await ElMessageBox.confirm(
+      `确定删除《${row.title}》？\n\n将级联删除：标签、点赞、收藏、评论、观看记录、收益、举报等所有关联数据。此操作不可恢复！`,
+      '删除视频',
+      { confirmButtonText: '确定删除', cancelButtonText: '取消', type: 'error' }
+    )
+  } catch { return }
+  await deleteVideo(row.video_id)
+  ElMessage.success('已删除')
+  load()
+}
+
 // ---------- 编辑弹窗 ----------
 function openEdit(row) {
   editingVideoId.value = row.video_id
diff --git a/app/lib/core/config/app_config.dart b/app/lib/core/config/app_config.dart
index 7bccfca..7832b92 100644
--- a/app/lib/core/config/app_config.dart
+++ b/app/lib/core/config/app_config.dart
@@ -3,8 +3,9 @@ class AppConfig {
   AppConfig._();
 
   /// App 版本（对应 pubspec version 的 name 部分；version_code 对应 build 号）
-  static const String appVersion = '1.1.0';
-  static const int appVersionCode = 2;
+  /// ⚠️ 每次发版必须与 pubspec.yaml 的 version 同步递增，否则老用户会一直提示更新
+  static const String appVersion = '1.1.7';
+  static const int appVersionCode = 9;
 
   /// 平台标识（运行时按 iOS/Android 判定，见 platformName）
   static const String platformNameIOS = 'ios';
diff --git a/app/lib/core/player/feed_player_pool.dart b/app/lib/core/player/feed_player_pool.dart
index 9446115..7092802 100644
--- a/app/lib/core/player/feed_player_pool.dart
+++ b/app/lib/core/player/feed_player_pool.dart
@@ -66,25 +66,33 @@ class FeedPlayerPool {
 
   /// 绑定窗口：index 为当前页；items 为已解析好播放地址的窗口数据源
   Future<void> bindWindow(int index, List<({int videoId, String url})> items) async {
-    // 1. 先把**所有**出窗/旧槽位强制停掉（不保留任何正在播放的声音）
-    //    只允许窗口内 [index-1, index, index+1] 这 3 个槽位持有资源
+    // 1. 先切换当前页指针（currentSlot / isCurrentPlaying / 完成回调都依赖它）
+    _currentIndex = index;
+
+    // 窗口内应保留的槽位集合 [index-1, index, index+1]
     final activeSet = <int>{};
     for (var offset = -1; offset <= 1; offset++) {
       final i = index + offset;
       if (i >= 0 && i < items.length) activeSet.add(slotOf(i));
     }
+
+    // 2. 立即静音（同步执行，不等后续网络 open）：
+    //    - 出窗槽位：stop（断音 + 清缓存），并复位
+    //    - 窗口内槽位：全部 pause（含刚划走的上一页，防止切页期间串音）
+    //    这一步必须早于任何 await，否则 open 新视频期间旧视频仍在出声
     for (var s = 0; s < slotCount; s++) {
-      if (activeSet.contains(s)) continue;
       final slot = _slots[s];
-      if (slot.videoId >= 0) {
-        // 确保旧视频彻底静音 + 停止解码（libmpv stop 不会立即断音 + 清缓存）
-        try { await slot.player.stop(); } catch (_) {}
+      if (slot.videoId < 0) continue;
+      if (activeSet.contains(s)) {
+        try { slot.player.pause(); } catch (_) {}
+      } else {
+        unawaited(slot.player.stop());
         slot.videoId = -1;
         slot.completeNotified = false;
       }
     }
 
-    // 2. 窗口内槽位按需加载（open 完才 play）
+    // 3. 窗口内槽位按需加载（open 完才 play）
     for (var offset = -1; offset <= 1; offset++) {
       final i = index + offset;
       if (i < 0 || i >= items.length) continue;
@@ -98,17 +106,6 @@ class FeedPlayerPool {
       }
     }
 
-    // 3. 窗口内非当前：pause 预缓冲（但确保不出声）
-    for (var offset = -1; offset <= 1; offset++) {
-      final i = index + offset;
-      if (i < 0 || i >= items.length) continue;
-      final slot = _slots[slotOf(i)];
-      if (i == index) continue; // 当前页留到最后统一 play
-      try {
-        slot.player.pause();
-      } catch (_) {}
-    }
-
     // 4. 当前槽：播放
     currentSlot.player.play();
   }
@@ -150,6 +147,14 @@ class FeedPlayerPool {
   void playCurrent() => currentSlot.player.play();
   void toggleCurrent() => currentSlot.player.playOrPause();
 
+  /// 翻页瞬间静音：暂停除目标槽位外的所有槽位，防止多个视频同时出声
+  void pauseExcept({required int slotIndex}) {
+    for (var i = 0; i < slotCount; i++) {
+      if (i == slotIndex) continue;
+      try { _slots[i].player.pause(); } catch (_) {}
+    }
+  }
+
   /// 释放全部资源（Feed 页 dispose 时调用）
   Future<void> dispose() async {
     for (final sub in _subs) {
diff --git a/app/lib/providers/feed_provider.dart b/app/lib/providers/feed_provider.dart
index 58fe4fc..bfec70a 100644
--- a/app/lib/providers/feed_provider.dart
+++ b/app/lib/providers/feed_provider.dart
@@ -150,6 +150,8 @@ class FeedNotifier extends StateNotifier<FeedState> {
 
   /// 翻页：滑出即暂停、滑入自动播放并上报观看计费（《01-开发文档》5.3）
   void onPageChanged(int index) {
+    // 立即静音全部非目标槽位，防止翻页动画期间多个视频同时出声
+    pool.pauseExcept(slotIndex: pool.slotOf(index));
     state = state.copyWith(currentIndex: index);
     // fire-and-forget：Future 内部会完整 await bindWindow 再 play，调用方不等
     _bindAndReport(index);
diff --git a/app/lib/router.dart b/app/lib/router.dart
index d12692b..4eaf6d4 100644
--- a/app/lib/router.dart
+++ b/app/lib/router.dart
@@ -69,6 +69,12 @@ final routerProvider = Provider<GoRouter>((ref) {
         builder: (_, state) =>
             SimplePlayerScreen(item: state.extra! as VideoItem),
       ),
+      // 通用单视频播放（extra 传 VideoItem）— 系列切换/Feed 点击等场景
+      GoRoute(
+        path: '/player',
+        builder: (_, state) =>
+            SimplePlayerScreen(item: state.extra! as VideoItem),
+      ),
       // 他人公开主页（游客可）
       GoRoute(
         path: '/user/:id',
diff --git a/app/lib/screens/feed/feed_screen.dart b/app/lib/screens/feed/feed_screen.dart
index f734ffb..2386d36 100644
--- a/app/lib/screens/feed/feed_screen.dart
+++ b/app/lib/screens/feed/feed_screen.dart
@@ -118,24 +118,33 @@ class _FeedScreenState extends ConsumerState<FeedScreen>
               child: Text('暂无视频', style: TextStyle(color: AppColors.textSecondary)),
             )
           else
-            PageView.builder(
-              controller: _pageController,
-              scrollDirection: Axis.vertical,
-              itemCount: state.items.length,
-              onPageChanged: notifier.onPageChanged,
-              itemBuilder: (context, index) {
-                final item = state.items[index];
-                return FeedVideoPage(
-                  key: ValueKey(item.videoId),
-                  item: item,
-                  slotIndex: notifier.pool.slotOf(index),
-                  pool: notifier.pool,
-                  isCurrent: index == state.currentIndex,
-                  onLike: notifier.toggleLike,
-                  onFavorite: notifier.toggleFavorite,
-                  onComment: _openComments,
-                );
+            NotificationListener<ScrollNotification>(
+              onNotification: (n) {
+                // 手指开始拖动即静音，避免划动过程中上一个视频仍在出声
+                if (n is ScrollStartNotification && n.dragDetails != null) {
+                  notifier.pool.pauseCurrent();
+                }
+                return false;
               },
+              child: PageView.builder(
+                controller: _pageController,
+                scrollDirection: Axis.vertical,
+                itemCount: state.items.length,
+                onPageChanged: notifier.onPageChanged,
+                itemBuilder: (context, index) {
+                  final item = state.items[index];
+                  return FeedVideoPage(
+                    key: ValueKey(item.videoId),
+                    item: item,
+                    slotIndex: notifier.pool.slotOf(index),
+                    pool: notifier.pool,
+                    isCurrent: index == state.currentIndex,
+                    onLike: notifier.toggleLike,
+                    onFavorite: notifier.toggleFavorite,
+                    onComment: _openComments,
+                  );
+                },
+              ),
             ),
 
           // 顶部：策略 Tab + 搜索入口
diff --git a/app/lib/screens/feed/widgets/feed_video_page.dart b/app/lib/screens/feed/widgets/feed_video_page.dart
index 4568e1c..6554c9f 100644
--- a/app/lib/screens/feed/widgets/feed_video_page.dart
+++ b/app/lib/screens/feed/widgets/feed_video_page.dart
@@ -7,6 +7,7 @@ import '../../../core/player/feed_player_pool.dart';
 import '../../../core/theme/app_theme.dart';
 import '../../../models/video_item.dart';
 import '../../../providers/auth_provider.dart';
+import '../../../services/video_service.dart';
 import 'feed_overlays.dart';
 import 'interaction_bar.dart';
 import 'video_info_section.dart';
@@ -40,8 +41,28 @@ class FeedVideoPage extends ConsumerStatefulWidget {
 
 class _FeedVideoPageState extends ConsumerState<FeedVideoPage> {
   int _likeBurstTrigger = 0;
+  Map<String, dynamic>? _seriesData;
 
-  static const _rates = [1.0, 1.25, 1.5, 2.0];
+  static const _rates = [1.0, 1.5, 2.0, 3.0];
+
+  @override
+  void initState() {
+    super.initState();
+    _loadSeries();
+  }
+
+  Future<void> _loadSeries() async {
+    final data = await VideoService.fetchVideoSeries(widget.item.videoId);
+    if (!mounted) return;
+    setState(() => _seriesData = data);
+  }
+
+  bool get _hasSeries =>
+      _seriesData != null && (_seriesData!['has_series'] as bool? ?? false);
+
+  String get _seriesTitle => _seriesData?['series']?['title'] as String? ?? '';
+
+  List<dynamic> get _episodes => (_seriesData?['episodes'] as List?) ?? const [];
 
   void _onDoubleTap() {
     if (!ref.read(authProvider).isLoggedIn) {
@@ -52,69 +73,98 @@ class _FeedVideoPageState extends ConsumerState<FeedVideoPage> {
     if (!widget.item.isLiked) widget.onLike(widget.item.videoId);
   }
 
+  /// 倍速标签：1.0→1X，1.5→1.5X
+  String _rateLabel(double r) =>
+      r == r.roundToDouble() ? '${r.toInt()}X' : '${r}X';
+
   void _onLongPress() {
-    showModalBottomSheet<void>(
-      context: context,
-      backgroundColor: Colors.white,
-      shape: const RoundedRectangleBorder(
-        borderRadius: BorderRadius.vertical(top: Radius.circular(16)),
-      ),
-      builder: (_) {
-        final currentRate = widget.pool.slotAt(widget.slotIndex).player.state.rate;
-        return SafeArea(
-          child: Column(
-            mainAxisSize: MainAxisSize.min,
-            children: [
-              ListTile(
-                leading: const Icon(Icons.speed, color: AppColors.primary),
-                title: const Text('倍速播放'),
-                subtitle: Text('当前 ${currentRate.toStringAsFixed(2)}x'),
-                onTap: () {
-                  Navigator.of(context).pop();
-                  _showRateSheet();
-                },
-              ),
-              const Divider(height: 1),
-              ListTile(
-                leading: const Icon(Icons.share_outlined),
-                title: const Text('分享'),
-                onTap: () {
-                  Navigator.of(context).pop();
-                  _share();
-                },
-              ),
-              const SizedBox(height: 8),
-            ],
-          ),
-        );
-      },
-    );
-  }
+    final player = widget.pool.slotAt(widget.slotIndex).player;
+    final currentRate = player.state.rate;
 
-  void _showRateSheet() {
-    final currentRate = widget.pool.slotAt(widget.slotIndex).player.state.rate;
     showModalBottomSheet<void>(
       context: context,
       backgroundColor: Colors.white,
+      isScrollControlled: true,
+      useSafeArea: true,
       shape: const RoundedRectangleBorder(
         borderRadius: BorderRadius.vertical(top: Radius.circular(16)),
       ),
-      builder: (_) => SafeArea(
+      builder: (sheetContext) => Padding(
+        padding: const EdgeInsets.fromLTRB(20, 20, 20, 12),
         child: Column(
           mainAxisSize: MainAxisSize.min,
+          crossAxisAlignment: CrossAxisAlignment.start,
           children: [
-            for (final r in _rates)
-              ListTile(
-                title: Center(child: Text('${r}x')),
-                trailing: (currentRate - r).abs() < 0.01
-                    ? const Icon(Icons.check, color: AppColors.primary)
-                    : null,
-                onTap: () {
-                  widget.pool.slotAt(widget.slotIndex).player.setRate(r);
-                  Navigator.of(context).pop();
-                },
-              ),
-            const SizedBox(height: 8),
+            // 标题 + 当前倍速
+            Row(
+              children: [
+                const Icon(Icons.speed, color: AppColors.primary, size: 20),
+                const SizedBox(width: 6),
+                const Text('倍速播放',
+                    style: TextStyle(
+                        fontSize: 15, fontWeight: FontWeight.w600)),
+                const Spacer(),
+                Text('当前 ${_rateLabel(currentRate)}',
+                    style: TextStyle(fontSize: 12, color: Colors.grey[600])),
+              ],
+            ),
+            const SizedBox(height: 14),
+
+            // 四档倍速：1X / 1.5X / 2X / 3X
+            Row(
+              children: [
+                for (final r in _rates) ...[
+                  Expanded(
+                    child: GestureDetector(
+                      onTap: () {
+                        player.setRate(r);
+                        Navigator.of(sheetContext).pop();
+                      },
+                      child: Container(
+                        height: 46,
+                        alignment: Alignment.center,
+                        decoration: BoxDecoration(
+                          color: (currentRate - r).abs() < 0.01
+                              ? AppColors.primary.withValues(alpha: 0.15)
+                              : Colors.grey[100],
+                          border: Border.all(
+                            color: (currentRate - r).abs() < 0.01
+                                ? AppColors.primary
+                                : Colors.transparent,
+                          ),
+                          borderRadius: BorderRadius.circular(8),
+                        ),
+                        child: Text(
+                          _rateLabel(r),
+                          style: TextStyle(
+                            fontSize: 16,
+                            fontWeight: FontWeight.w600,
+                            color: (currentRate - r).abs() < 0.01
+                                ? AppColors.primary
+                                : Colors.black87,
+                          ),
+                        ),
+                      ),
+                    ),
+                  ),
+                  if (r != _rates.last) const SizedBox(width: 10),
+                ],
+              ],
+            ),
+
+            const SizedBox(height: 16),
+            const Divider(height: 1),
+
+            // 分享
+            ListTile(
+              contentPadding: EdgeInsets.zero,
+              leading: const Icon(Icons.share_outlined),
+              title: const Text('分享'),
+              onTap: () {
+                Navigator.of(sheetContext).pop();
+                _share();
+              },
+            ),
           ],
         ),
       ),
@@ -126,6 +176,121 @@ class _FeedVideoPageState extends ConsumerState<FeedVideoPage> {
     await Share.share(text, subject: widget.item.title);
   }
 
+  void _showSeriesSheet() {
+    showModalBottomSheet<void>(
+      context: context,
+      backgroundColor: Colors.white,
+      isScrollControlled: true,
+      useSafeArea: true,
+      shape: const RoundedRectangleBorder(
+        borderRadius: BorderRadius.vertical(top: Radius.circular(16)),
+      ),
+      builder: (_) => DraggableScrollableSheet(
+        initialChildSize: 0.6,
+        minChildSize: 0.4,
+        maxChildSize: 0.9,
+        expand: false,
+        builder: (_, controller) => Column(
+          children: [
+            Container(
+              margin: const EdgeInsets.only(top: 12),
+              width: 40, height: 4,
+              decoration: BoxDecoration(
+                color: Colors.grey[300],
+                borderRadius: BorderRadius.circular(2),
+              ),
+            ),
+            Padding(
+              padding: const EdgeInsets.all(16),
+              child: Row(
+                children: [
+                  Expanded(
+                    child: Column(
+                      crossAxisAlignment: CrossAxisAlignment.start,
+                      children: [
+                        Text(
+                          _seriesTitle,
+                          style: const TextStyle(
+                              fontSize: 16, fontWeight: FontWeight.w600),
+                          maxLines: 1, overflow: TextOverflow.ellipsis,
+                        ),
+                        const SizedBox(height: 2),
+                        Text(
+                          '共 ${_episodes.length} 集',
+                          style: TextStyle(
+                              fontSize: 12, color: Colors.grey[600]),
+                        ),
+                      ],
+                    ),
+                  ),
+                ],
+              ),
+            ),
+            const Divider(height: 1),
+            Expanded(
+              child: ListView.builder(
+                controller: controller,
+                itemCount: _episodes.length,
+                itemBuilder: (_, i) {
+                  final ep = _episodes[i] as Map<String, dynamic>;
+                  final isCurrent = ep['video_id'] == widget.item.videoId;
+                  return ListTile(
+                    leading: Container(
+                      width: 40, height: 40,
+                      alignment: Alignment.center,
+                      decoration: BoxDecoration(
+                        color: isCurrent
+                            ? AppColors.primary.withValues(alpha: 0.15)
+                            : Colors.grey[100],
+                        borderRadius: BorderRadius.circular(8),
+                      ),
+                      child: Text(
+                        '${ep['episode_no'] ?? i + 1}',
+                        style: TextStyle(
+                          fontWeight: FontWeight.w700,
+                          color: isCurrent ? AppColors.primary : Colors.black87,
+                        ),
+                      ),
+                    ),
+                    title: Text(
+                      ep['title'] as String? ?? '',
+                      maxLines: 1, overflow: TextOverflow.ellipsis,
+                      style: TextStyle(
+                        fontSize: 14,
+                        fontWeight:
+                            isCurrent ? FontWeight.w600 : FontWeight.normal,
+                        color: isCurrent ? AppColors.primary : Colors.black87,
+                      ),
+                    ),
+                    trailing: isCurrent
+                        ? const Icon(Icons.play_circle_filled,
+                            color: AppColors.primary, size: 20)
+                        : null,
+                    onTap: () => _switchToEpisode(ep),
+                  );
+                },
+              ),
+            ),
+          ],
+        ),
+      ),
+    );
+  }
+
+  void _switchToEpisode(Map<String, dynamic> ep) {
+    Navigator.of(context).pop();
+    final newItem = VideoItem(
+      videoId: ep['video_id'] as int,
+      title: ep['title'] as String? ?? '',
+      coverUrl: ep['cover_url'] as String? ?? '',
+      videoUrl: ep['video_url'] as String? ?? '',
+      duration: (ep['duration'] as num?)?.toInt() ?? 0,
+      author: widget.item.author,
+    );
+    // 打开 SimplePlayerScreen 播放该集
+    context.push('/player', extra: newItem);
+  }
+
   @override
   Widget build(BuildContext context) {
     return GestureDetector(
@@ -159,7 +324,7 @@ class _FeedVideoPageState extends ConsumerState<FeedVideoPage> {
               pool: widget.pool,
               slotIndex: widget.slotIndex,
               coverUrl: widget.item.coverUrl,
-              playing: widget.isCurrent && widget.pool.isCurrentPlaying,
+              isCurrent: widget.isCurrent,
             ),
 
             // 双击爱心动画
@@ -176,10 +341,47 @@ class _FeedVideoPageState extends ConsumerState<FeedVideoPage> {
               ),
             ),
 
-            // 左下信息区
+            // 左下信息区 + 系列标题（系列标题在信息区上方，不重叠）
             Positioned(
               left: 12, right: 88, bottom: 24,
-              child: VideoInfoSection(item: widget.item),
+              child: Column(
+                crossAxisAlignment: CrossAxisAlignment.start,
+                mainAxisSize: MainAxisSize.min,
+                children: [
+                  // 系列标题（当前视频属于系列时显示，点击弹出系列列表）
+                  if (_hasSeries)
+                    GestureDetector(
+                      onTap: _showSeriesSheet,
+                      child: Container(
+                        margin: const EdgeInsets.only(bottom: 8),
+                        padding: const EdgeInsets.symmetric(horizontal: 10, vertical: 6),
+                        decoration: BoxDecoration(
+                          color: Colors.black54,
+                          borderRadius: BorderRadius.circular(8),
+                        ),
+                        child: Row(
+                          mainAxisSize: MainAxisSize.min,
+                          children: [
+                            const Icon(Icons.playlist_play, color: Colors.white, size: 16),
+                            const SizedBox(width: 4),
+                            Text(
+                              _seriesTitle,
+                              style: const TextStyle(
+                                color: Colors.white,
+                                fontSize: 13,
+                                fontWeight: FontWeight.w600,
+                              ),
+                            ),
+                            const SizedBox(width: 2),
+                            const Icon(Icons.chevron_right, color: Colors.white, size: 14),
+                          ],
+                        ),
+                      ),
+                    ),
+                  // 视频信息（昵称/标题/描述）
+                  VideoInfoSection(item: widget.item),
+                ],
+              ),
             ),
           ],
         ),
diff --git a/app/lib/screens/feed/widgets/video_player_view.dart b/app/lib/screens/feed/widgets/video_player_view.dart
index 20a8938..98b48ba 100644
--- a/app/lib/screens/feed/widgets/video_player_view.dart
+++ b/app/lib/screens/feed/widgets/video_player_view.dart
@@ -13,13 +13,15 @@ class VideoPlayerView extends StatefulWidget {
     required this.pool,
     required this.slotIndex,
     required this.coverUrl,
-    required this.playing,
+    required this.isCurrent,
   });
 
   final FeedPlayerPool pool;
   final int slotIndex;
   final String coverUrl;
-  final bool playing;
+
+  /// 该页是否为当前页（暂停图标只在当前页显示，避免划走后旧页残留大图标）
+  final bool isCurrent;
 
   @override
   State<VideoPlayerView> createState() => _VideoPlayerViewState();
@@ -30,6 +32,7 @@ class _VideoPlayerViewState extends State<VideoPlayerView> {
   Duration _position = Duration.zero;
   Duration _duration = Duration.zero;
   bool _seeking = false;
+  double _seekValue = 0;   // 拖动中的视觉值（0~1），拖动期间直接控制 painter
 
   @override
   void initState() {
@@ -43,16 +46,26 @@ class _VideoPlayerViewState extends State<VideoPlayerView> {
   }
 
   double get _value {
+    if (_seeking) return _seekValue;
     final total = _duration.inMilliseconds;
     if (total <= 0) return 0;
     final cur = _position.inMilliseconds.clamp(0, total);
     return cur / total;
   }
 
-  void _onSeekStart(double v) => setState(() => _seeking = true);
-  void _onSeek(double v) => setState(() {});
+  void _onSeekStart(double v) {
+    setState(() {
+      _seeking = true;
+      _seekValue = v;
+    });
+  }
+
+  void _onSeek(double v) {
+    setState(() => _seekValue = v);
+  }
+
   void _onSeekEnd(double v) {
-    _seeking = false;
+    setState(() => _seeking = false);
     final totalMs = _duration.inMilliseconds;
     if (totalMs > 0) {
       _slot.player.seek(Duration(milliseconds: (v * totalMs).round()));
@@ -88,14 +101,22 @@ class _VideoPlayerViewState extends State<VideoPlayerView> {
           },
         ),
 
-        // 暂停态大播放图标
-        if (!widget.playing)
-          const IgnorePointer(
-            child: Center(
-              child: Icon(
-                Icons.play_arrow_rounded,
-                size: 88, color: Colors.white70,
-              ),
+        // 暂停态大播放图标：只在当前页、且该槽位确实处于暂停态时显示
+        if (widget.isCurrent)
+          IgnorePointer(
+            child: StreamBuilder<bool>(
+              stream: _slot.player.stream.playing,
+              initialData: _slot.player.state.playing,
+              builder: (_, snapshot) {
+                final playing = snapshot.data ?? false;
+                if (playing) return const SizedBox.shrink();
+                return const Center(
+                  child: Icon(
+                    Icons.play_arrow_rounded,
+                    size: 88, color: Colors.white70,
+                  ),
+                );
+              },
             ),
           ),
 
diff --git a/app/lib/screens/player/simple_player_screen.dart b/app/lib/screens/player/simple_player_screen.dart
index 264fbf2..64ef662 100644
--- a/app/lib/screens/player/simple_player_screen.dart
+++ b/app/lib/screens/player/simple_player_screen.dart
@@ -12,10 +12,11 @@ import '../../models/video_item.dart';
 import '../../services/video_service.dart';
 import '../feed/widgets/feed_overlays.dart';
 
-/// 单视频播放页（搜索/用户主页/作品/收藏/历史共用）：
+/// 单视频播放页（搜索/用户主页/作品/收藏/历史/系列共用）：
 /// - 一条极薄进度条贴视频底部，可点击跳转 / 可拖动 seek
 /// - 顶部返回 + 倍速 + 系列
 /// - 点屏幕中央切换播放/暂停（图标短暂淡出）
+/// - 系列视频支持上下划切换上一集/下一集
 class SimplePlayerScreen extends StatefulWidget {
   const SimplePlayerScreen({super.key, required this.item});
 
@@ -44,6 +45,11 @@ class _SimplePlayerScreenState extends State<SimplePlayerScreen> {
   StreamSubscription<Duration>? _posSub;
   StreamSubscription<Duration>? _durSub;
 
+  // 系列切换（上下划）
+  late PageController _pageController;
+  int _currentPage = 0;
+  List<VideoItem> _episodeItems = [];
+
   @override
   void initState() {
     super.initState();
@@ -72,6 +78,32 @@ class _SimplePlayerScreenState extends State<SimplePlayerScreen> {
     final data = await VideoService.fetchVideoSeries(widget.item.videoId);
     if (!mounted) return;
     setState(() => _seriesData = data);
+    _initEpisodePage();
+  }
+
+  void _initEpisodePage() {
+    if (!_hasSeries) return;
+    final episodes = _episodes;
+    if (episodes.isEmpty) return;
+
+    _episodeItems = episodes.map((ep) {
+      final m = ep as Map<String, dynamic>;
+      return VideoItem(
+        videoId: m['video_id'],
+        title: m['title'] ?? '',
+        coverUrl: m['cover_url'] ?? '',
+        videoUrl: m['video_url'] ?? '',
+        duration: (m['duration'] as num?)?.toInt() ?? 0,
+        author: widget.item.author,
+      );
+    }).toList();
+
+    _currentPage = _episodeItems.indexWhere(
+      (e) => e.videoId == widget.item.videoId,
+    );
+    if (_currentPage < 0) _currentPage = 0;
+
+    _pageController = PageController(initialPage: _currentPage);
   }
 
   @override
@@ -80,6 +112,7 @@ class _SimplePlayerScreenState extends State<SimplePlayerScreen> {
     _posSub?.cancel();
     _durSub?.cancel();
     _player.dispose();
+    if (_hasSeries) _pageController.dispose();
     super.dispose();
   }
 
@@ -88,7 +121,6 @@ class _SimplePlayerScreenState extends State<SimplePlayerScreen> {
   void _toggle() {
     setState(() => _playing = !_playing);
     _playing ? _player.play() : _player.pause();
-    // 短暂显示暂停/播放图标
     setState(() => _showPauseIcon = true);
     _pauseIconTimer?.cancel();
     _pauseIconTimer = Timer(const Duration(milliseconds: 600), () {
@@ -260,28 +292,55 @@ class _SimplePlayerScreenState extends State<SimplePlayerScreen> {
 
   void _switchToEpisode(Map<String, dynamic> ep) {
     Navigator.of(context).pop();
+    _switchToEpisodeById(ep['video_id'] as int);
+  }
+
+  void _switchToEpisodeById(int videoId) {
+    if (videoId == widget.item.videoId) return;
+
+    // 从 episodes 里找到目标集，构造新的 VideoItem
+    final epData = _episodes.firstWhere(
+      (e) => (e as Map)['video_id'] == videoId,
+      orElse: () => null,
+    ) as Map<String, dynamic>?;
+    if (epData == null) return;
+
     final newItem = VideoItem(
-      videoId: ep['video_id'],
-      title: ep['title'] ?? '',
-      coverUrl: ep['cover_url'] ?? '',
-      videoUrl: ep['video_url'] ?? '',
-      duration: (ep['duration'] as num?)?.toInt() ?? 0,
+      videoId: videoId,
+      title: epData['title'] ?? '',
+      coverUrl: epData['cover_url'] ?? '',
+      videoUrl: epData['video_url'] ?? '',
+      duration: (epData['duration'] as num?)?.toInt() ?? 0,
       author: widget.item.author,
     );
+
+    // 彻底销毁旧 Player，创建新 Player
+    _posSub?.cancel();
+    _durSub?.cancel();
+    _player.dispose();
+
     setState(() {
-      _player.dispose();
       _player = Player();
       _controller = VideoController(_player);
       _position = Duration.zero;
       _duration = Duration.zero;
+      _playing = true;
       _open(newItem);
-      _seriesData = null;
     });
+
     _subscribePlayer();
     _reportWatch();
     _loadSeries();
   }
 
+  // ---------- 上下划切换（系列） ----------
+
+  void _onPageChanged(int index) {
+    if (index == _currentPage) return;
+    _currentPage = index;
+    _switchToEpisodeById(_episodeItems[index].videoId);
+  }
+
   // ---------- Watch ----------
 
   Future<void> _reportWatch() async {
@@ -312,120 +371,150 @@ class _SimplePlayerScreenState extends State<SimplePlayerScreen> {
 
   @override
   Widget build(BuildContext context) {
-    return Scaffold(
-      backgroundColor: Colors.black,
-      body: GestureDetector(
-        behavior: HitTestBehavior.opaque,
-        onTap: _toggle,
-        child: Stack(
-          fit: StackFit.expand,
-          children: [
-            // 视频画面
-            Center(
-              child: Video(
-                controller: _controller,
-                controls: NoVideoControls,
-                fit: BoxFit.contain,
+    final content = GestureDetector(
+      behavior: HitTestBehavior.opaque,
+      onTap: _toggle,
+      child: Stack(
+        fit: StackFit.expand,
+        children: [
+          // 视频画面
+          Center(
+            child: Video(
+              controller: _controller,
+              controls: NoVideoControls,
+              fit: BoxFit.contain,
+            ),
+          ),
+
+          // 中央播放/暂停图标（短暂显示）
+          if (_showPauseIcon)
+            const IgnorePointer(
+              child: Center(
+                child: Icon(
+                  Icons.play_circle_outline,
+                  size: 72,
+                  color: Colors.white70,
+                ),
               ),
             ),
 
-            // 中央播放/暂停图标（短暂显示）
-            if (_showPauseIcon)
-              const IgnorePointer(
-                child: Center(
-                  child: Icon(
-                    Icons.play_circle_outline,
-                    size: 72,
-                    color: Colors.white70,
-                  ),
-                ),
-              ),
-
-            // ---------- 顶部：返回 + 倍速 + 系列 ----------
-            SafeArea(
-              child: Row(
-                mainAxisAlignment: MainAxisAlignment.spaceBetween,
-                children: [
-                  const BackButton(color: Colors.white),
-                  Row(
-                    mainAxisSize: MainAxisSize.min,
-                    children: [
-                      // 倍速
-                      PopupMenuButton<double>(
-                        initialValue: _rate,
-                        icon: const Icon(Icons.speed, color: Colors.white),
-                        tooltip: '倍速',
-                        onSelected: _setRate,
-                        itemBuilder: (_) => _rates
-                            .map((r) => PopupMenuItem(
-                                  value: r,
-                                  child: Text('${r}x'),
-                                ))
-                            .toList(),
+          // ---------- 顶部：返回 + 倍速 + 系列 ----------
+          SafeArea(
+            child: Row(
+              mainAxisAlignment: MainAxisAlignment.spaceBetween,
+              children: [
+                const BackButton(color: Colors.white),
+                Row(
+                  mainAxisSize: MainAxisSize.min,
+                  children: [
+                    // 倍速
+                    PopupMenuButton<double>(
+                      initialValue: _rate,
+                      icon: const Icon(Icons.speed, color: Colors.white),
+                      tooltip: '倍速',
+                      onSelected: _setRate,
+                      itemBuilder: (_) => _rates
+                          .map((r) => PopupMenuItem(
+                                value: r,
+                                child: Text('${r}x'),
+                              ))
+                          .toList(),
+                    ),
+                    if (_hasSeries)
+                      IconButton(
+                        icon: const Icon(Icons.menu_book, color: Colors.white),
+                        tooltip: '查看系列',
+                        onPressed: _showSeriesSheet,
                       ),
-                      if (_hasSeries)
-                        IconButton(
-                          icon: const Icon(Icons.menu_book, color: Colors.white),
-                          tooltip: '查看系列',
-                          onPressed: _showSeriesSheet,
+                  ],
+                ),
+              ],
+            ),
+          ),
+
+          // ---------- 底部：标题 + 抖音风格细进度条 ----------
+          Positioned(
+            left: 0, right: 0, bottom: 0,
+            child: IgnorePointer(
+              child: Column(
+                mainAxisSize: MainAxisSize.min,
+                crossAxisAlignment: CrossAxisAlignment.start,
+                children: [
+                  Padding(
+                    padding: const EdgeInsets.fromLTRB(16, 0, 16, 4),
+                    child: Column(
+                      crossAxisAlignment: CrossAxisAlignment.start,
+                      mainAxisSize: MainAxisSize.min,
+                      children: [
+                        Text(
+                          '@${widget.item.author.nickname}',
+                          style: const TextStyle(
+                              fontSize: 13,
+                              fontWeight: FontWeight.w600,
+                              color: Colors.white),
                         ),
-                    ],
+                        const SizedBox(height: 2),
+                        Text(
+                          widget.item.title,
+                          style: const TextStyle(
+                              fontSize: 12, color: Colors.white70),
+                          maxLines: 1,
+                          overflow: TextOverflow.ellipsis,
+                        ),
+                      ],
+                    ),
                   ),
                 ],
               ),
             ),
+          ),
 
-            // ---------- 底部：标题 + 抖音风格细进度条 ----------
-            Positioned(
-              left: 0, right: 0, bottom: 0,
-              child: IgnorePointer(
-                child: Column(
-                  mainAxisSize: MainAxisSize.min,
-                  crossAxisAlignment: CrossAxisAlignment.start,
-                  children: [
-                    // 标题信息（贴底，不占用视频观看空间）
-                    Padding(
-                      padding: const EdgeInsets.fromLTRB(16, 0, 16, 4),
-                      child: Column(
-                        crossAxisAlignment: CrossAxisAlignment.start,
-                        mainAxisSize: MainAxisSize.min,
-                        children: [
-                          Text(
-                            '@${widget.item.author.nickname}',
-                            style: const TextStyle(
-                                fontSize: 13,
-                                fontWeight: FontWeight.w600,
-                                color: Colors.white),
-                          ),
-                          const SizedBox(height: 2),
-                          Text(
-                            widget.item.title,
-                            style: const TextStyle(
-                                fontSize: 12, color: Colors.white70),
-                            maxLines: 1,
-                            overflow: TextOverflow.ellipsis,
-                          ),
-                        ],
-                      ),
-                    ),
-                  ],
+          // 进度条：抖音风格一条细线，覆盖视频底部
+          Positioned(
+            left: 0, right: 0, bottom: 0,
+            child: _ThinProgressBar(
+              value: _sliderValue,
+              onChanged: _onSeek,
+              onChangeStart: _onSeekStart,
+              onChangeEnd: _onSeekEnd,
+            ),
+          ),
+        ],
+      ),
+    );
+
+    // 系列视频：用 PageView 支持上下划切换集数
+    if (_hasSeries && _episodeItems.isNotEmpty) {
+      return Scaffold(
+        backgroundColor: Colors.black,
+        body: PageView.builder(
+          controller: _pageController,
+          scrollDirection: Axis.vertical,
+          itemCount: _episodeItems.length,
+          onPageChanged: _onPageChanged,
+          itemBuilder: (_, index) {
+            // 只有当前页才渲染完整播放器（其他页只放占位）
+            if (index == _currentPage) {
+              return content;
+            }
+            return Container(
+              color: Colors.black,
+              child: Center(
+                child: Text(
+                  _episodeItems[index].title,
+                  style: const TextStyle(color: Colors.white38),
                 ),
               ),
-            ),
-
-            // 进度条：抖音风格一条细线，覆盖视频底部
-            Positioned(
-              left: 0, right: 0, bottom: 0,
-              child: _ThinProgressBar(
-                value: _sliderValue,
-                onChanged: _onSeek,
-                onChangeStart: _onSeekStart,
-                onChangeEnd: _onSeekEnd,
-              ),
-            ),
-          ],
+            );
+          },
         ),
-      ),
+      );
+    }
+
+    // 非系列视频：直接渲染
+    return Scaffold(
+      backgroundColor: Colors.black,
+      body: content,
     );
   }
 }
@@ -528,39 +617,29 @@ class _ProgressPainter extends CustomPainter {
       ..color = Colors.white.withValues(alpha: dragging ? 0.35 : 0.22)
       ..strokeCap = StrokeCap.round
       ..strokeWidth = h;
-    canvas.drawLine(
-      Offset(0, size.height / 2),
-      Offset(w, size.height / 2),
-      trackPaint,
-    );
+    canvas.drawLine(Offset(0, y), Offset(w, y), trackPaint);
 
-    // 已播放部分（纯白）
+    // 已播放部分（白色）
     if (value > 0) {
       final playedPaint = Paint()
         ..color = Colors.white
         ..strokeCap = StrokeCap.round
         ..strokeWidth = h;
-      canvas.drawLine(
-        Offset(0, size.height / 2),
-        Offset(value * w, size.height / 2),
-        playedPaint,
-      );
+      canvas.drawLine(Offset(0, y), Offset(value * w, y), playedPaint);
     }
 
-    // 拖动时显示 thumb（小圆点）
+    // 拖动时的 thumb
     if (dragging) {
-      final thumbPaint = Paint()
-        ..color = Colors.white
-        ..style = PaintingStyle.fill;
       canvas.drawCircle(
-        Offset(value * w, size.height / 2),
-        6,
-        thumbPaint,
+        Offset(value * w, y), 6,
+        Paint()
+          ..color = Colors.white
+          ..style = PaintingStyle.fill,
       );
     }
   }
 
   @override
-  bool shouldRepaint(covariant _ProgressPainter oldDelegate) =>
-      value != oldDelegate.value || dragging != oldDelegate.dragging;
+  bool shouldRepaint(covariant _ProgressPainter old) =>
+      value != old.value || dragging != old.dragging;
 }
diff --git a/app/pubspec.yaml b/app/pubspec.yaml
index 844f40e..6c3e8c4 100644
--- a/app/pubspec.yaml
+++ b/app/pubspec.yaml
@@ -2,7 +2,7 @@ name: video_app
 description: "短视频应用（Flutter，iOS/Android 双端）"
 publish_to: 'none'
 
-version: 1.1.0+2
+version: 1.1.7+9
 
 environment:
   sdk: ^3.9.2
diff --git a/server/app/__pycache__/config.cpython-311.pyc b/server/app/__pycache__/config.cpython-311.pyc
index 0201174..579e4a4 100644
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diff --git a/server/app/api/v1/__pycache__/admin.cpython-311.pyc b/server/app/api/v1/__pycache__/admin.cpython-311.pyc
index 85264d3..a9a3195 100644
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diff --git a/server/app/api/v1/__pycache__/videos.cpython-311.pyc b/server/app/api/v1/__pycache__/videos.cpython-311.pyc
index 913bb2f..29ea0ca 100644
Binary files a/server/app/api/v1/__pycache__/videos.cpython-311.pyc and b/server/app/api/v1/__pycache__/videos.cpython-311.pyc differ
diff --git a/server/app/api/v1/admin.py b/server/app/api/v1/admin.py
index 5c38b96..e443fa2 100644
--- a/server/app/api/v1/admin.py
+++ b/server/app/api/v1/admin.py
@@ -101,7 +101,7 @@ async def update_video(video_id: int, req: _VideoUpdateReq,
                        db: AsyncSession = Depends(get_db),
                        admin: AdminIdentity = Depends(require_super)):
     from app.models.video import Video, Series
-    from sqlalchemy import select
+    from sqlalchemy import select, func
 
     v = await db.get(Video, video_id)
     if not v:
@@ -147,6 +147,44 @@ async def update_video(video_id: int, req: _VideoUpdateReq,
     return ok({"video_id": v.id})
 
 
+@router.delete("/videos/{video_id}")
+async def delete_video(video_id: int,
+                       db: AsyncSession = Depends(get_db),
+                       admin: AdminIdentity = Depends(require_super)):
+    """删除视频（级联删除所有关联数据：标签/点赞/收藏/评论/观看记录/收益/举报）"""
+    from app.models.video import Video, VideoTag, Series
+    from app.models.interaction import Like, Favorite, Comment
+    from app.models.billing import WatchRecord
+    from app.models.incentive import VideoEarning
+    from app.models.common import Report
+    from sqlalchemy import select, delete
+
+    v = await db.get(Video, video_id)
+    if not v:
+        raise BizException(errors.NOT_FOUND, "视频不存在")
+
+    # 如果属于系列，先解绑（保持系列数据干净）
+    if v.series_id:
+        v.series_id = None
+        v.episode_no = None
+        await db.flush()
+
+    # 级联删除所有关联表
+    await db.execute(delete(VideoTag).where(VideoTag.video_id == video_id))
+    await db.execute(delete(Like).where(Like.video_id == video_id))
+    await db.execute(delete(Favorite).where(Favorite.video_id == video_id))
+    await db.execute(delete(Comment).where(Comment.video_id == video_id))
+    await db.execute(delete(WatchRecord).where(WatchRecord.video_id == video_id))
+    await db.execute(delete(VideoEarning).where(VideoEarning.video_id == video_id))
+    # 举报（target_type=1 表示视频）
+    await db.execute(delete(Report).where(Report.target_type == 1, Report.target_id == video_id))
+
+    # 删除视频本身
+    await db.delete(v)
+    await db.commit()
+    return ok({"video_id": video_id, "deleted": True})
+
+
 @router.post("/videos")
 async def create_video(req: schema.AdminVideoCreateReq, request: Request,
                        db: AsyncSession = Depends(get_db),
diff --git a/server/app/models/__pycache__/video.cpython-311.pyc b/server/app/models/__pycache__/video.cpython-311.pyc
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index 12c155a..ded2f8f 100644
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