diff --git a/src/app/aggregate/page.tsx b/src/app/aggregate/page.tsx
index 7a8cf1f..67275b4 100644
--- a/src/app/aggregate/page.tsx
+++ b/src/app/aggregate/page.tsx
@@ -251,28 +251,6 @@ function AggregatePageClient() {
           <div className='max-w-[95%] mx-auto'>
             {/* 主信息区：左图右文 */}
             <div className='relative flex flex-col md:flex-row gap-8 mb-0 sm:mb-8 bg-transparent rounded-xl p-2 sm:p-6 md:items-start'>
-              {/* 返回按钮 */}
-              <button
-                onClick={() => {
-                  window.history.back();
-                }}
-                className='absolute top-0 left-0 -translate-x-[40%] -translate-y-[30%] sm:-translate-x-[180%] sm:-translate-y-1/2 p-2 rounded transition-colors'
-              >
-                <svg
-                  className='h-5 w-5 text-gray-500 hover:text-green-600 dark:text-gray-400 dark:hover:text-green-500 transition-colors'
-                  viewBox='0 0 24 24'
-                  fill='none'
-                  xmlns='http://www.w3.org/2000/svg'
-                >
-                  <path
-                    d='M15 19l-7-7 7-7'
-                    stroke='currentColor'
-                    strokeWidth='2'
-                    strokeLinecap='round'
-                    strokeLinejoin='round'
-                  />
-                </svg>
-              </button>
               {/* 封面 */}
               <div className='flex-shrink-0 w-full max-w-[200px] sm:max-w-none md:w-72 mx-auto'>
                 <Image
diff --git a/src/app/detail/page.tsx b/src/app/detail/page.tsx
deleted file mode 100644
index 4b856ee..0000000
--- a/src/app/detail/page.tsx
+++ /dev/null
@@ -1,383 +0,0 @@
-/* eslint-disable react-hooks/exhaustive-deps, no-console */
-
-'use client';
-
-import { Heart, LinkIcon } from 'lucide-react';
-import Image from 'next/image';
-import { useSearchParams } from 'next/navigation';
-import { Suspense, useEffect, useState } from 'react';
-
-import type { PlayRecord } from '@/lib/db.client';
-import {
-  generateStorageKey,
-  getAllPlayRecords,
-  isFavorited,
-  toggleFavorite,
-} from '@/lib/db.client';
-import {
-  type VideoDetail,
-  fetchVideoDetail,
-} from '@/lib/fetchVideoDetail.client';
-
-import PageLayout from '@/components/PageLayout';
-
-function DetailPageClient() {
-  const searchParams = useSearchParams();
-  const [detail, setDetail] = useState<VideoDetail | null>(null);
-  const [loading, setLoading] = useState(true);
-  const [error, setError] = useState<string | null>(null);
-  const [playRecord, setPlayRecord] = useState<PlayRecord | null>(null);
-  const [favorited, setFavorited] = useState(false);
-  // 是否倒序显示选集
-  const [reverseEpisodeOrder, setReverseEpisodeOrder] = useState(false);
-
-  const fallbackTitle = searchParams.get('title') || '';
-  const fallbackYear = searchParams.get('year') || '';
-
-  // 格式化剩余时间（如 1h 50m）
-  const formatDuration = (seconds: number) => {
-    const h = Math.floor(seconds / 3600);
-    const m = Math.floor((seconds % 3600) / 60);
-    const parts: string[] = [];
-    if (h) parts.push(`${h}h`);
-    if (m) parts.push(`${m}m`);
-    if (parts.length === 0) parts.push('0m');
-    return parts.join(' ');
-  };
-
-  useEffect(() => {
-    const source = searchParams.get('source');
-    const id = searchParams.get('id');
-
-    if (!source || !id) {
-      setError('缺少必要参数');
-      setLoading(false);
-      return;
-    }
-
-    const fetchData = async () => {
-      try {
-        // 获取视频详情
-        const detailData = await fetchVideoDetail({
-          source,
-          id,
-          fallbackTitle: fallbackTitle.trim(),
-          fallbackYear,
-        });
-        setDetail(detailData);
-
-        // 获取播放记录
-        const allRecords = await getAllPlayRecords();
-        const key = generateStorageKey(source, id);
-        setPlayRecord(allRecords[key] || null);
-
-        // 检查收藏状态
-        try {
-          const fav = await isFavorited(source, id);
-          setFavorited(fav);
-        } catch (checkErr) {
-          console.error('检查收藏状态失败:', checkErr);
-        }
-      } catch (err) {
-        setError(err instanceof Error ? err.message : '获取详情失败');
-      } finally {
-        setLoading(false);
-      }
-    };
-
-    fetchData();
-  }, [searchParams]);
-
-  // 切换收藏状态
-  const handleToggleFavorite = async () => {
-    const source = searchParams.get('source');
-    const id = searchParams.get('id');
-    if (!source || !id || !detail) return;
-
-    try {
-      const newState = await toggleFavorite(source, id, {
-        title: detail.title,
-        source_name: detail.source_name,
-        year: detail.year || fallbackYear || '',
-        cover: detail.poster || '',
-        total_episodes: detail.episodes.length || 1,
-        save_time: Date.now(),
-      });
-      setFavorited(newState);
-    } catch (err) {
-      console.error('切换收藏失败:', err);
-    }
-  };
-
-  return (
-    <PageLayout activePath='/detail'>
-      <div className='flex flex-col min-h-full px-2 sm:px-10 pt-4 sm:pt-8 pb-[calc(3.5rem+env(safe-area-inset-bottom))] overflow-visible'>
-        {/* 顶部返回按钮已移入右侧信息容器 */}
-        {loading ? (
-          <div className='flex items-center justify-center min-h-[60vh]'>
-            <div className='animate-spin rounded-full h-12 w-12 border-t-2 border-b-2 border-blue-500'></div>
-          </div>
-        ) : error ? (
-          <div className='flex items-center justify-center min-h-[60vh]'>
-            <div className='text-red-500 text-center'>
-              <div className='text-lg font-semibold mb-2'>加载失败</div>
-              <div className='text-sm'>{error}</div>
-            </div>
-          </div>
-        ) : !detail ? (
-          <div className='flex items-center justify-center min-h-[60vh]'>
-            <div className='text-gray-500 text-center'>
-              <div className='text-lg font-semibold mb-2'>未找到视频详情</div>
-            </div>
-          </div>
-        ) : (
-          <div className='max-w-[95%] mx-auto'>
-            {/* 主信息区：左图右文 */}
-            <div className='relative flex flex-col md:flex-row gap-8 mb-0 sm:mb-8 bg-transparent rounded-xl p-2 sm:p-6 md:items-start'>
-              {/* 返回按钮放置在主信息区左上角 */}
-              <button
-                onClick={() => {
-                  window.history.back();
-                }}
-                className='absolute top-0 left-0 -translate-x-[40%] -translate-y-[30%] sm:-translate-x-[180%] sm:-translate-y-1/2 p-2 rounded transition-colors'
-              >
-                <svg
-                  className='h-5 w-5 text-gray-500 hover:text-green-600 dark:text-gray-400 dark:hover:text-green-500 transition-colors'
-                  viewBox='0 0 24 24'
-                  fill='none'
-                  xmlns='http://www.w3.org/2000/svg'
-                >
-                  <path
-                    d='M15 19l-7-7 7-7'
-                    stroke='currentColor'
-                    strokeWidth='2'
-                    strokeLinecap='round'
-                    strokeLinejoin='round'
-                  />
-                </svg>
-              </button>
-              {/* 封面 */}
-              <div className='flex-shrink-0 w-full max-w-[200px] sm:max-w-none md:w-72 mx-auto'>
-                <Image
-                  src={detail.poster || '/images/placeholder.png'}
-                  alt={detail.title || fallbackTitle}
-                  width={288}
-                  height={432}
-                  className='w-full rounded-xl object-cover'
-                  style={{ aspectRatio: '2/3' }}
-                  priority
-                  unoptimized
-                />
-              </div>
-              {/* 右侧信息 */}
-              <div
-                className='flex-1 flex flex-col min-h-0'
-                style={{ height: '430px' }}
-              >
-                <h1 className='text-3xl font-bold mb-2 tracking-wide flex items-center flex-shrink-0 text-center md:text-left w-full'>
-                  {detail.title || fallbackTitle}
-                  {detail.douban_id && (
-                    <a
-                      href={`https://movie.douban.com/subject/${detail.douban_id}/`}
-                      target='_blank'
-                      rel='noopener noreferrer'
-                      onClick={(e) => e.stopPropagation()}
-                      className='ml-2'
-                    >
-                      <LinkIcon className='w-4 h-4' strokeWidth={2} />
-                    </a>
-                  )}
-                </h1>
-                <div className='flex flex-wrap items-center gap-3 text-base mb-4 opacity-80 flex-shrink-0'>
-                  {detail.class && (
-                    <span className='text-green-600 font-semibold'>
-                      {detail.class}
-                    </span>
-                  )}
-                  {(detail.year || fallbackYear) && (
-                    <span>{detail.year || fallbackYear}</span>
-                  )}
-                  {detail.source_name && (
-                    <span className='border border-gray-500/60 px-2 py-[1px] rounded'>
-                      {detail.source_name}
-                    </span>
-                  )}
-                  {detail.type_name && <span>{detail.type_name}</span>}
-                </div>
-                {/* 按钮区域 */}
-                <div className='flex items-center gap-4 mb-4 flex-shrink-0'>
-                  {playRecord ? (
-                    <>
-                      {/* 恢复播放 */}
-                      <a
-                        href={`/play?source=${searchParams.get(
-                          'source'
-                        )}&id=${searchParams.get(
-                          'id'
-                        )}&title=${encodeURIComponent(detail.title)}${
-                          detail.year || fallbackYear
-                            ? `&year=${detail.year || fallbackYear}`
-                            : ''
-                        }`}
-                        className='flex items-center justify-center gap-2 px-6 py-2 bg-green-500 hover:bg-green-600 rounded-lg transition-colors text-white'
-                      >
-                        <div className='w-0 h-0 border-t-[6px] border-t-transparent border-l-[10px] border-l-white border-b-[6px] border-b-transparent'></div>
-                        <span>恢复播放</span>
-                      </a>
-                      {/* 从头开始 */}
-                      <a
-                        href={`/play?source=${searchParams.get(
-                          'source'
-                        )}&id=${searchParams.get(
-                          'id'
-                        )}&index=1&position=0&title=${encodeURIComponent(
-                          detail.title
-                        )}${
-                          detail.year || fallbackYear
-                            ? `&year=${detail.year || fallbackYear}`
-                            : ''
-                        }`}
-                        className='hidden sm:flex items-center justify-center gap-2 px-6 py-2 bg-gray-500 hover:bg-gray-600 dark:bg-gray-700 dark:hover:bg-gray-600 rounded-lg transition-colors text-white'
-                      >
-                        <div className='w-0 h-0 border-t-[6px] border-t-transparent border-l-[10px] border-l-white border-b-[6px] border-b-transparent'></div>
-                        <span>从头开始</span>
-                      </a>
-                    </>
-                  ) : (
-                    <>
-                      {/* 播放 */}
-                      <a
-                        href={`/play?source=${searchParams.get(
-                          'source'
-                        )}&id=${searchParams.get(
-                          'id'
-                        )}&index=1&position=0&title=${encodeURIComponent(
-                          detail.title
-                        )}${
-                          detail.year || fallbackYear
-                            ? `&year=${detail.year || fallbackYear}`
-                            : ''
-                        }`}
-                        className='flex items-center justify-center gap-2 px-6 py-2 bg-green-500 hover:bg-green-600 rounded-lg transition-colors text-white'
-                      >
-                        <div className='w-0 h-0 border-t-[6px] border-t-transparent border-l-[10px] border-l-white border-b-[6px] border-b-transparent'></div>
-                        <span>播放</span>
-                      </a>
-                    </>
-                  )}
-                  {/* 爱心按钮 */}
-                  <button
-                    onClick={handleToggleFavorite}
-                    className={`flex items-center justify-center w-10 h-10 rounded-full transition-colors ${
-                      favorited
-                        ? 'bg-gray-300 hover:bg-gray-400 dark:bg-gray-600 dark:hover:bg-gray-500'
-                        : 'bg-gray-400 hover:bg-gray-500 dark:bg-gray-700 dark:hover:bg-gray-600'
-                    }`}
-                  >
-                    <Heart
-                      className={`h-5 w-5 stroke-[2] ${
-                        favorited ? 'text-red-500' : 'text-white'
-                      }`}
-                      fill={favorited ? 'currentColor' : 'none'}
-                    />
-                  </button>
-                </div>
-                {/* 播放记录进度条 */}
-                {playRecord && (
-                  <div className='mb-4 flex items-center gap-3 w-full max-w-sm'>
-                    {/* 进度条 */}
-                    <div className='flex-1 h-1 bg-gray-600 rounded-sm overflow-hidden'>
-                      <div
-                        className='h-full bg-green-500'
-                        style={{
-                          width: `${
-                            (playRecord.play_time / playRecord.total_time) * 100
-                          }%`,
-                        }}
-                      ></div>
-                    </div>
-                    {/* 剩余时间 */}
-                    <span className='text-gray-600/60 dark:text-gray-400/60 text-xs whitespace-nowrap'>
-                      {playRecord.total_episodes > 1
-                        ? `第${playRecord.index}集 剩余 `
-                        : '剩余 '}
-                      {formatDuration(
-                        playRecord.total_time - playRecord.play_time
-                      )}
-                    </span>
-                  </div>
-                )}
-                {detail.desc && (
-                  <div
-                    className='mt-0 text-base leading-relaxed opacity-90 overflow-y-auto pr-2 flex-1 min-h-0 scrollbar-hide'
-                    style={{ whiteSpace: 'pre-line' }}
-                  >
-                    {detail.desc}
-                  </div>
-                )}
-              </div>
-            </div>
-            {/* 选集按钮区 */}
-            {detail.episodes && detail.episodes.length > 0 && (
-              <div className='mt-0 sm:mt-8 bg-transparent rounded-xl p-2 sm:p-6'>
-                <div className='flex items-center gap-2 mb-4'>
-                  <div className='text-xl font-semibold'>选集</div>
-                  <div className='text-gray-400 ml-2'>
-                    共 {detail.episodes.length} 集
-                  </div>
-                  {/* 倒序切换 */}
-                  <span
-                    onClick={() => setReverseEpisodeOrder((prev) => !prev)}
-                    className={`ml-4 text-sm cursor-pointer select-none transition-colors ${
-                      reverseEpisodeOrder
-                        ? 'text-green-500'
-                        : 'text-gray-400 hover:text-gray-500'
-                    }`}
-                  >
-                    倒序
-                  </span>
-                </div>
-                <div className='grid grid-cols-3 gap-2 sm:grid-cols-[repeat(auto-fill,_minmax(6rem,_6rem))] sm:gap-4 justify-start'>
-                  {(reverseEpisodeOrder
-                    ? Array.from(
-                        { length: detail.episodes.length },
-                        (_, i) => i
-                      ).reverse()
-                    : Array.from(
-                        { length: detail.episodes.length },
-                        (_, i) => i
-                      )
-                  ).map((idx) => (
-                    <a
-                      key={idx}
-                      href={`/play?source=${searchParams.get(
-                        'source'
-                      )}&id=${searchParams.get('id')}&index=${
-                        idx + 1
-                      }&position=0&title=${encodeURIComponent(detail.title)}${
-                        detail.year || fallbackYear
-                          ? `&year=${detail.year || fallbackYear}`
-                          : ''
-                      }`}
-                      className='bg-gray-500/80 hover:bg-green-500 dark:bg-gray-700/80 dark:hover:bg-green-600 text-white px-5 py-2 rounded-lg transition-colors text-base font-medium w-24 text-center'
-                    >
-                      {idx + 1}
-                    </a>
-                  ))}
-                </div>
-              </div>
-            )}
-          </div>
-        )}
-      </div>
-    </PageLayout>
-  );
-}
-
-export default function DetailPage() {
-  return (
-    <Suspense>
-      <DetailPageClient />
-    </Suspense>
-  );
-}
diff --git a/src/components/EpisodeSelector.tsx b/src/components/EpisodeSelector.tsx
index 073856a..9e4bb44 100644
--- a/src/components/EpisodeSelector.tsx
+++ b/src/components/EpisodeSelector.tsx
@@ -53,8 +53,9 @@ const EpisodeSelector: React.FC<EpisodeSelectorProps> = ({
   const pageCount = Math.ceil(totalEpisodes / episodesPerPage);
 
   // 主要的 tab 状态：'episodes' 或 'sources'
+  // 当只有一集时默认展示 "换源"，并隐藏 "选集" 标签
   const [activeTab, setActiveTab] = useState<'episodes' | 'sources'>(
-    'episodes'
+    totalEpisodes > 1 ? 'episodes' : 'sources'
   );
 
   // 当前分页索引（0 开始）
@@ -118,6 +119,20 @@ const EpisodeSelector: React.FC<EpisodeSelectorProps> = ({
     [onSourceChange]
   );
 
+  // 如果组件初始即显示 "换源"，自动触发搜索一次
+  useEffect(() => {
+    if (
+      activeTab === 'sources' &&
+      availableSources.length === 0 &&
+      videoTitle &&
+      onSearchSources
+    ) {
+      onSearchSources(videoTitle);
+    }
+    // 只在依赖变化时尝试，availableSources 长度变化可阻止重复搜索
+    // eslint-disable-next-line react-hooks/exhaustive-deps
+  }, [activeTab, availableSources.length, videoTitle]);
+
   const currentStart = currentPage * episodesPerPage + 1;
   const currentEnd = Math.min(
     currentStart + episodesPerPage - 1,
@@ -128,18 +143,20 @@ const EpisodeSelector: React.FC<EpisodeSelectorProps> = ({
     <div className='md:ml-2 px-4 py-0 h-full rounded-xl bg-black/10 dark:bg-white/5 flex flex-col border border-white/0 dark:border-white/30 overflow-hidden'>
       {/* 主要的 Tab 切换 - 无缝融入设计 */}
       <div className='flex mb-1 -mx-6 flex-shrink-0'>
-        <div
-          onClick={() => setActiveTab('episodes')}
-          className={`flex-1 py-3 px-6 text-center cursor-pointer transition-all duration-200 font-medium
-            ${
-              activeTab === 'episodes'
-                ? 'text-green-500 dark:text-green-400'
-                : 'text-gray-700 hover:text-green-600 bg-black/5 dark:bg-white/5 dark:text-gray-300 dark:hover:text-green-400 hover:bg-black/3 dark:hover:bg-white/3'
-            }
-          `.trim()}
-        >
-          选集
-        </div>
+        {totalEpisodes > 1 && (
+          <div
+            onClick={() => setActiveTab('episodes')}
+            className={`flex-1 py-3 px-6 text-center cursor-pointer transition-all duration-200 font-medium
+              ${
+                activeTab === 'episodes'
+                  ? 'text-green-500 dark:text-green-400'
+                  : 'text-gray-700 hover:text-green-600 bg-black/5 dark:bg-white/5 dark:text-gray-300 dark:hover:text-green-400 hover:bg-black/3 dark:hover:bg-white/3'
+              }
+            `.trim()}
+          >
+            选集
+          </div>
+        )}
         <div
           onClick={handleSourceTabClick}
           className={`flex-1 py-3 px-6 text-center cursor-pointer transition-all duration-200 font-medium
diff --git a/src/components/PageLayout.tsx b/src/components/PageLayout.tsx
index c9f2d3b..4c8ce49 100644
--- a/src/components/PageLayout.tsx
+++ b/src/components/PageLayout.tsx
@@ -14,7 +14,9 @@ const PageLayout = ({ children, activePath = '/' }: PageLayoutProps) => {
   return (
     <div className='w-full min-h-screen'>
       {/* 移动端头部 */}
-      <MobileHeader showBackButton={activePath === '/play'} />
+      <MobileHeader
+        showBackButton={['/play', '/aggregate'].includes(activePath)}
+      />
 
       {/* 主要布局容器 */}
       <div className='flex md:grid md:grid-cols-[auto_1fr] w-full min-h-screen md:min-h-auto'>
@@ -26,9 +28,11 @@ const PageLayout = ({ children, activePath = '/' }: PageLayoutProps) => {
         {/* 主内容区域 */}
         <div className='relative min-w-0 flex-1 transition-all duration-300'>
           {/* 桌面端左上角返回按钮 */}
-          <div className='absolute top-3 left-1 z-20 hidden md:flex'>
-            <BackButton />
-          </div>
+          {['/play', '/aggregate'].includes(activePath) && (
+            <div className='absolute top-3 left-1 z-20 hidden md:flex'>
+              <BackButton />
+            </div>
+          )}
 
           {/* 桌面端顶部按钮 */}
           <div className='absolute top-2 right-4 z-20 hidden md:flex items-center gap-2'>
diff --git a/src/components/VideoCard.tsx b/src/components/VideoCard.tsx
index 4c92e56..3b114f0 100644
--- a/src/components/VideoCard.tsx
+++ b/src/components/VideoCard.tsx
@@ -153,7 +153,7 @@ export default function VideoCard({
 
   return (
     <Link
-      href={`/detail?source=${source}&id=${id}&title=${encodeURIComponent(
+      href={`/play?source=${source}&id=${id}&title=${encodeURIComponent(
         title.trim()
       )}${year ? `&year=${year}` : ''}${from ? `&from=${from}` : ''}`}
     >