diff --git a/app/aweme/[awemeId]/Client.tsx b/app/aweme/[awemeId]/Client.tsx
index 02e7a36..e7beea8 100644
--- a/app/aweme/[awemeId]/Client.tsx
+++ b/app/aweme/[awemeId]/Client.tsx
@@ -2,7 +2,13 @@
 
 import { Play } from "lucide-react";
 import { useRouter } from "next/navigation";
-import { useCallback, useEffect, useRef, useState } from "react";
+import {
+  type ReactElement,
+  useCallback,
+  useEffect,
+  useRef,
+  useState,
+} from "react";
 import { BackgroundCanvas } from "./components/BackgroundCanvas";
 import { CommentPanel } from "./components/CommentPanel";
 import { ImageCarousel } from "./components/ImageCarousel";
@@ -52,7 +58,7 @@ export default function AwemeDetailClient({
   data,
   neighbors,
   transcript,
-}: AwemeDetailClientProps) {
+}: AwemeDetailClientProps): ReactElement {
   const router = useRouter();
   const isVideo = data.type === "video";
 
@@ -64,24 +70,44 @@ export default function AwemeDetailClient({
     isVideo ? (data as VideoData).content_tags : [],
   );
 
+  // 同步跨作品状态重置
+  useEffect(() => {
+    setContentTags(isVideo ? (data as VideoData).content_tags : []);
+    setTranscriptOpen(false);
+    playerState.setProgress(0);
+    playerState.setProgressRestored(false);
+    playerState.setRotation(0);
+  }, [
+    data,
+    isVideo,
+    playerState.setProgress,
+    playerState.setProgressRestored,
+    playerState.setRotation,
+  ]);
+
   // 引用
   const mediaContainerRef = useRef<HTMLDivElement | null>(null);
   const videoRef = useRef<HTMLVideoElement | null>(null);
   const audioRef = useRef<HTMLAudioElement | null>(null);
   const scrollerRef = useRef<HTMLDivElement | null>(null);
   const backgroundCanvasRef = useRef<HTMLCanvasElement | null>(null);
+  const progressRef = useRef<number>(playerState.progress);
+  progressRef.current = playerState.progress;
 
-  const pauseImageMedia = useCallback((reset = false) => {
+  const pauseImageMedia = useCallback((reset = false): void => {
     const audioEl = audioRef.current;
     if (audioEl) {
       audioEl.pause();
       if (reset) audioEl.currentTime = 0;
     }
 
-    scrollerRef.current?.querySelectorAll("video").forEach((videoEl) => {
-      videoEl.pause();
-      if (reset) videoEl.currentTime = 0;
-    });
+    const videos = scrollerRef.current?.querySelectorAll("video");
+    if (videos) {
+      for (const videoEl of videos) {
+        videoEl.pause();
+        if (reset) videoEl.currentTime = 0;
+      }
+    }
   }, []);
 
   // 图文轮播状态
@@ -115,7 +141,7 @@ export default function AwemeDetailClient({
 
   // 媒体操作函数
   const seekTo = useCallback(
-    (ratio: number) => {
+    (ratio: number): void => {
       const clampedRatio = Math.min(1, Math.max(0, ratio));
       if (isVideo) {
         const v = videoRef.current;
@@ -129,70 +155,85 @@ export default function AwemeDetailClient({
     [imageCarouselState.seekTo, imageCount, isVideo],
   );
 
-  const seekImageByVisualRatio = (ratio: number) => {
-    if (!imageCount) return;
+  const seekImageByVisualRatio = useCallback(
+    (ratio: number): void => {
+      if (!imageCount) return;
 
-    const clampedRatio = Math.min(1, Math.max(0, ratio));
-    const rawSegment = clampedRatio * imageCount;
-    const targetIndex = Math.min(imageCount - 1, Math.floor(rawSegment));
-    const segmentProgress = Math.min(1, Math.max(0, rawSegment - targetIndex));
-    imageCarouselState.goToIndex(targetIndex, segmentProgress);
-  };
+      const clampedRatio = Math.min(1, Math.max(0, ratio));
+      const rawSegment = clampedRatio * imageCount;
+      const targetIndex = Math.min(imageCount - 1, Math.floor(rawSegment));
+      const segmentProgress = Math.min(
+        1,
+        Math.max(0, rawSegment - targetIndex),
+      );
+      imageCarouselState.goToIndex(targetIndex, segmentProgress);
+    },
+    [imageCarouselState.goToIndex, imageCount],
+  );
 
-  const handleControlSeek = (ratio: number) => {
-    if (isVideo) {
-      seekTo(ratio);
-      return;
-    }
-    seekImageByVisualRatio(ratio);
-  };
+  const handleControlSeek = useCallback(
+    (ratio: number): void => {
+      if (isVideo) {
+        seekTo(ratio);
+        return;
+      }
+      seekImageByVisualRatio(ratio);
+    },
+    [isVideo, seekImageByVisualRatio, seekTo],
+  );
 
-  const togglePlay = async () => {
+  const togglePlay = useCallback((): void => {
     if (isVideo) {
       const v = videoRef.current;
       if (!v) return;
-      if (v.paused) await v.play().catch(() => {});
-      else v.pause();
+      if (v.paused) {
+        void v.play().catch(() => {});
+      } else {
+        v.pause();
+      }
       return;
     }
     const el = audioRef.current;
     if (!playerState.isPlaying) {
       playerState.setIsPlaying(true);
-      try {
-        await el?.play().catch(() => {});
-      } catch {}
+      void el?.play().catch(() => {});
     } else {
       playerState.setIsPlaying(false);
       pauseImageMedia();
     }
-  };
+  }, [
+    isVideo,
+    pauseImageMedia,
+    playerState.isPlaying,
+    playerState.setIsPlaying,
+  ]);
 
-  const toggleFullscreen = () => {
+  const toggleFullscreen = useCallback((): void => {
     if (!document.fullscreenElement) {
       if (document.body.requestFullscreen) {
-        document.body.requestFullscreen().catch(() => {});
+        void document.body.requestFullscreen().catch(() => {});
         return;
       }
       const vRef = videoRef.current as WebkitVideoElement | null;
       if (vRef?.requestFullscreen) {
-        vRef.requestFullscreen().catch(() => {});
+        void vRef.requestFullscreen().catch(() => {});
         return;
       }
       if (vRef?.webkitEnterFullscreen) {
         vRef.webkitEnterFullscreen();
       }
     } else {
-      document.exitFullscreen().catch(() => {});
+      void document.exitFullscreen().catch(() => {});
     }
-  };
+  }, []);
 
-  const prevImg = useCallback(() => {
+  const prevImg = useCallback((): void => {
     if (!imageCount) return;
     const next = Math.max(0, imageCarouselState.idxRef.current - 1);
     imageCarouselState.goToIndex(next);
   }, [imageCarouselState.goToIndex, imageCarouselState.idxRef, imageCount]);
 
-  const nextImg = useCallback(() => {
+  const nextImg = useCallback((): void => {
     if (!imageCount) return;
     const next = Math.min(
       imageCount - 1,
@@ -201,7 +242,7 @@ export default function AwemeDetailClient({
     imageCarouselState.goToIndex(next);
   }, [imageCarouselState.goToIndex, imageCarouselState.idxRef, imageCount]);
 
-  const handleDownload = () => {
+  const handleDownload = useCallback((): void => {
     if (isVideo) {
       const videoUrl = (data as VideoData).video_url;
       const link = document.createElement("a");
@@ -212,15 +253,44 @@ export default function AwemeDetailClient({
       document.body.removeChild(link);
     } else {
       if (!images?.length) return;
-      const currentImage = images[imageCarouselState.idx];
+      const currentImage = images[imageCarouselState.idxRef.current];
+      if (!currentImage) return;
       const link = document.createElement("a");
       link.href = currentImage.url;
-      link.download = `image_${data.aweme_id}_${imageCarouselState.idx + 1}.jpg`;
+      link.download = `image_${data.aweme_id}_${imageCarouselState.idxRef.current + 1}.jpg`;
       document.body.appendChild(link);
       link.click();
       document.body.removeChild(link);
     }
-  };
+  }, [data, imageCarouselState.idxRef, images, isVideo]);
+
+  const handleShowTranscript = useCallback((): void => {
+    setTranscriptOpen(true);
+  }, []);
+
+  const handleCloseTranscript = useCallback((): void => {
+    setTranscriptOpen(false);
+  }, []);
+
+  const handleCloseComments = useCallback((): void => {
+    commentState.setOpen(false);
+  }, [commentState.setOpen]);
+
+  const handleToggleComments = useCallback((): void => {
+    commentState.setOpen((v) => !v);
+  }, [commentState.setOpen]);
+
+  const handleNavigatePrev = useCallback((): void => {
+    if (neighbors.prev) {
+      router.push(`/aweme/${neighbors.prev.aweme_id}`);
+    }
+  }, [neighbors.prev, router]);
+
+  const handleNavigateNext = useCallback((): void => {
+    if (neighbors.next) {
+      router.push(`/aweme/${neighbors.next.aweme_id}`);
+    }
+  }, [neighbors.next, router]);
 
   // 导航相关
   useNavigation({
@@ -233,23 +303,22 @@ export default function AwemeDetailClient({
     togglePlay,
   });
 
-  // 背景画布
+  // 背景画布（仅视频且播放时采样绘制）
   useBackgroundCanvas({
     isVideo,
-    idx: imageCarouselState.idx,
+    isPlaying: playerState.isPlaying,
     videoRef,
-    scrollerRef,
     backgroundCanvasRef,
   });
 
   useEffect(() => {
     if (isVideo) return;
 
-    const pauseForPageLifecycle = () => {
+    const pauseForPageLifecycle = (): void => {
       playerState.setIsPlaying(false);
       pauseImageMedia();
     };
-    const handleVisibilityChange = () => {
+    const handleVisibilityChange = (): void => {
       if (document.hidden) pauseForPageLifecycle();
     };
 
@@ -263,27 +332,22 @@ export default function AwemeDetailClient({
     };
   }, [isVideo, pauseImageMedia, playerState.setIsPlaying]);
 
-  // Media Session API 集成
+  // Media Session API：元信息仅在作品切换时设置一次，避免高频触发 iOS IPC 卡顿
   useEffect(() => {
     if (typeof window === "undefined") return;
     if (!("mediaSession" in navigator)) return;
 
-    const ms = navigator.mediaSession as MediaSessionWithPositionState;
-
-    // 元信息：标题、作者、专辑（使用创建时间），封面图（优先当前图片，其次作者头像）
+    const ms = navigator.mediaSession;
     const title = data.desc || `作品 ${data.aweme_id}`;
     const artist = data.author.nickname || "作者";
     const album = new Date(data.created_at).toLocaleString();
-    // 单一封面图：使用作品 cover_url
-    const coverUrl = (data as AwemeData).cover_url as string | undefined;
-    const coverSize = (data as AwemeData).cover_size as
-      | { w: number; h: number }
-      | undefined;
+    const coverUrl = data.cover_url;
+    const coverSize = data.cover_size;
     const artwork = coverUrl
       ? [
           {
             src: coverUrl,
-            size: `${coverSize?.w || 512}x${coverSize?.h || 512}`,
+            sizes: `${coverSize?.w || 512}x${coverSize?.h || 512}`,
           },
         ]
       : [];
@@ -291,15 +355,20 @@ export default function AwemeDetailClient({
     try {
       ms.metadata = new MediaMetadata({ title, artist, album, artwork });
     } catch {}
+  }, [data]);
+
+  // Media Session API：播放状态与低频位置同步（不依赖 progress state，消除 30fps 重绑开销）
+  useEffect(() => {
+    if (typeof window === "undefined") return;
+    if (!("mediaSession" in navigator)) return;
+
+    const ms = navigator.mediaSession as MediaSessionWithPositionState;
 
-    // 更新播放状态
     try {
       ms.playbackState = playerState.isPlaying ? "playing" : "paused";
     } catch {}
 
-    const getImagesTotalMs = () => imageCarouselState.totalDurationMs;
-
-    const updatePosition = () => {
+    const updatePosition = (): void => {
       try {
         if (!ms.setPositionState) return;
         if (isVideo) {
@@ -313,73 +382,67 @@ export default function AwemeDetailClient({
             playbackRate: playerState.rate ?? 1,
           });
         } else if (images?.length) {
-          const totalMs = getImagesTotalMs();
+          const totalMs = imageCarouselState.totalDurationMs;
           const duration = totalMs / 1000;
           const position = Math.max(
             0,
-            Math.min(duration, (playerState.progress * totalMs) / 1000),
+            Math.min(duration, (progressRef.current * totalMs) / 1000),
           );
           ms.setPositionState({ duration, position, playbackRate: 1 });
         }
       } catch {}
     };
 
-    // 绑定视频事件以同步状态
     const v = videoRef.current;
     if (isVideo && v) {
-      const onPlay = () => {
+      const onPlay = (): void => {
         try {
           ms.playbackState = "playing";
         } catch {}
         updatePosition();
       };
-      const onPause = () => {
+      const onPause = (): void => {
         try {
           ms.playbackState = "paused";
         } catch {}
         updatePosition();
       };
-      const onTimeUpdate = () => updatePosition();
+      const onSeeked = (): void => updatePosition();
 
       v.addEventListener("play", onPlay);
       v.addEventListener("pause", onPause);
-      v.addEventListener("timeupdate", onTimeUpdate);
-      // 初始同步
+      v.addEventListener("seeked", onSeeked);
+      const id = window.setInterval(updatePosition, 1000);
       updatePosition();
 
-      // 清理
       return () => {
+        window.clearInterval(id);
         v.removeEventListener("play", onPlay);
         v.removeEventListener("pause", onPause);
-        v.removeEventListener("timeupdate", onTimeUpdate);
+        v.removeEventListener("seeked", onSeeked);
       };
-    } else if (!isVideo && images?.length) {
-      // 图文用定时器定期同步位置
+    }
+
+    if (!isVideo && images?.length) {
       const id = window.setInterval(updatePosition, 1000);
-      // 初始同步
       updatePosition();
       return () => window.clearInterval(id);
     }
-    // 依赖：当这些变化时刷新元信息与位置状态
   }, [
-    data,
     imageCarouselState.totalDurationMs,
-    images,
+    images?.length,
     isVideo,
     playerState.isPlaying,
-    playerState.progress,
     playerState.rate,
   ]);
 
-  // 绑定系统媒体控件的操作处理程序
+  // 绑定系统媒体控件的操作处理程序（不依赖 progress state，仅在作品切换时注册一次）
   useEffect(() => {
     if (typeof window === "undefined") return;
     if (!("mediaSession" in navigator)) return;
     const ms = navigator.mediaSession;
 
-    const getImagesTotalMs = () => imageCarouselState.totalDurationMs;
-
-    const handlePlay = async () => {
+    const handlePlay = async (): Promise<void> => {
       if (isVideo) {
         const v = videoRef.current;
         try {
@@ -392,7 +455,7 @@ export default function AwemeDetailClient({
         } catch {}
       }
     };
-    const handlePause = () => {
+    const handlePause = (): void => {
       if (isVideo) {
         const v = videoRef.current;
         v?.pause();
@@ -401,7 +464,7 @@ export default function AwemeDetailClient({
         pauseImageMedia();
       }
     };
-    const handleStop = () => {
+    const handleStop = (): void => {
       if (isVideo) {
         const v = videoRef.current;
         if (v) {
@@ -414,30 +477,30 @@ export default function AwemeDetailClient({
         seekTo(0);
       }
     };
-    const handleSeekDelta = (deltaSec: number) => {
+    const handleSeekDelta = (deltaSec: number): void => {
       if (isVideo) {
         const v = videoRef.current;
-        if (v)
+        if (v) {
           v.currentTime = Math.max(
             0,
             Math.min(v.duration || Infinity, v.currentTime + deltaSec),
           );
+        }
       } else if (images?.length) {
-        const totalMs = getImagesTotalMs();
+        const totalMs = imageCarouselState.totalDurationMs;
         if (totalMs <= 0) return;
         const deltaRatio = (deltaSec * 1000) / totalMs;
-        seekTo(playerState.progress + deltaRatio);
+        seekTo(progressRef.current + deltaRatio);
       }
     };
-    const handleSeekTo = (seekTimeSec: number) => {
+    const handleSeekTo = (seekTimeSec: number): void => {
       if (isVideo) {
         const v = videoRef.current;
         if (v && Number.isFinite(v.duration)) {
           v.currentTime = Math.max(0, Math.min(v.duration, seekTimeSec));
         }
       } else if (images?.length) {
-        const totalMs = getImagesTotalMs();
-        const totalSec = totalMs / 1000;
+        const totalSec = imageCarouselState.totalDurationMs / 1000;
         if (totalSec > 0) seekTo(seekTimeSec / totalSec);
       }
     };
@@ -446,10 +509,10 @@ export default function AwemeDetailClient({
     ms.setActionHandler("pause", handlePause);
     ms.setActionHandler("stop", handleStop);
     ms.setActionHandler("seekbackward", (details: MediaSessionActionDetails) =>
-      handleSeekDelta(-((details?.seekOffset as number) || 10)),
+      handleSeekDelta(-(details?.seekOffset ?? 10)),
     );
     ms.setActionHandler("seekforward", (details: MediaSessionActionDetails) =>
-      handleSeekDelta((details?.seekOffset as number) || 10),
+      handleSeekDelta(details?.seekOffset ?? 10),
     );
     ms.setActionHandler("seekto", (details: MediaSessionActionDetails) => {
       if (typeof details?.seekTime === "number") handleSeekTo(details.seekTime);
@@ -483,11 +546,10 @@ export default function AwemeDetailClient({
     };
   }, [
     isVideo,
-    images,
+    images?.length,
     neighbors.prev,
     neighbors.next,
     router,
-    playerState.progress,
     playerState.setIsPlaying,
     pauseImageMedia,
     imageCarouselState.totalDurationMs,
@@ -498,7 +560,7 @@ export default function AwemeDetailClient({
 
   return (
     <div className="h-screen w-full">
-      <BackgroundCanvas ref={backgroundCanvasRef} />
+      {isVideo ? <BackgroundCanvas ref={backgroundCanvasRef} /> : null}
 
       <div className="relative h-full landscape:flex landscape:flex-row">
         {/* 主媒体区域 */}
@@ -510,6 +572,7 @@ export default function AwemeDetailClient({
             <div className="absolute inset-0 z-0">
               {isVideo ? (
                 <VideoPlayer
+                  key={data.aweme_id}
                   ref={videoRef}
                   videoUrl={(data as VideoData).video_url}
                   rotation={playerState.rotation}
@@ -519,15 +582,24 @@ export default function AwemeDetailClient({
                 />
               ) : (
                 <ImageCarousel
+                  key={data.aweme_id}
                   ref={scrollerRef}
                   images={images}
                   currentIndex={imageCarouselState.idx}
                   isPlaying={playerState.isPlaying}
-                  segmentProgress={imageCarouselState.segProgress}
+                  segmentProgressRef={imageCarouselState.segProgressRef}
                   mediaSyncToken={imageCarouselState.mediaSyncToken}
                   loopMode={playerState.loopMode}
+                  hasNextNeighbor={Boolean(neighbors.next)}
+                  rotation={playerState.rotation}
+                  objectFit={playerState.objectFit}
+                  failedAnimatedMap={imageCarouselState.failedAnimatedMap}
                   onTogglePlay={togglePlay}
                   onAnimatedDuration={imageCarouselState.setSegmentDuration}
+                  onMediaReady={imageCarouselState.markMediaReady}
+                  onAnimatedFailed={imageCarouselState.markAnimatedFailed}
+                  onAnimatedProgress={imageCarouselState.handleAnimatedProgress}
+                  onAnimatedEnded={imageCarouselState.handleAnimatedEnded}
                 />
               )}
             </div>
@@ -535,7 +607,7 @@ export default function AwemeDetailClient({
             {/* 暂停图标 */}
             {!playerState.isPlaying && (
               <div className="pointer-events-none absolute inset-0 z-30 grid place-items-center">
-                <div className="rounded-full bg-black/40 p-6 backdrop-blur-sm">
+                <div className="rounded-full bg-black/50 p-6">
                   <Play size={64} className="text-white" fill="white" />
                 </div>
               </div>
@@ -579,8 +651,8 @@ export default function AwemeDetailClient({
               segmentProgress={imageCarouselState.segProgress}
               musicUrl={isVideo ? undefined : (data as ImageData).music_url}
               audioRef={audioRef}
-              hasTranscript={isVideo && !!transcript}
-              onShowTranscript={() => setTranscriptOpen(true)}
+              hasTranscript={isVideo && Boolean(transcript)}
+              onShowTranscript={handleShowTranscript}
               onTogglePlay={togglePlay}
               onSeek={handleControlSeek}
               onVolumeChange={playerState.setVolume}
@@ -598,20 +670,16 @@ export default function AwemeDetailClient({
             neighbors={neighbors}
             commentsCount={data.commentsCount}
             likesCount={data.likesCount}
-            onNavigatePrev={() =>
-              neighbors.prev && router.push(`/aweme/${neighbors.prev.aweme_id}`)
-            }
-            onNavigateNext={() =>
-              neighbors.next && router.push(`/aweme/${neighbors.next.aweme_id}`)
-            }
-            onToggleComments={() => commentState.setOpen((v) => !v)}
+            onNavigatePrev={handleNavigatePrev}
+            onNavigateNext={handleNavigateNext}
+            onToggleComments={handleToggleComments}
           />
         </section>
 
         {/* 评论面板 */}
         <CommentPanel
           open={commentState.open}
-          onClose={() => commentState.setOpen(false)}
+          onClose={handleCloseComments}
           author={data.author}
           createdAt={data.created_at}
           awemeId={data.aweme_id}
@@ -621,7 +689,7 @@ export default function AwemeDetailClient({
         {/* 转录面板 */}
         <TranscriptPanel
           open={transcriptOpen}
-          onClose={() => setTranscriptOpen(false)}
+          onClose={handleCloseTranscript}
           transcript={transcript}
         />
       </div>
diff --git a/app/aweme/[awemeId]/components/BackgroundCanvas.tsx b/app/aweme/[awemeId]/components/BackgroundCanvas.tsx
index 8fcc2de..2d0f393 100644
--- a/app/aweme/[awemeId]/components/BackgroundCanvas.tsx
+++ b/app/aweme/[awemeId]/components/BackgroundCanvas.tsx
@@ -1,18 +1,15 @@
-import { forwardRef } from "react";
+import { forwardRef, memo } from "react";
 
-interface BackgroundCanvasProps {}
-
-export const BackgroundCanvas = forwardRef<
-  HTMLCanvasElement,
-  BackgroundCanvasProps
->((props, ref) => {
-  return (
-    <canvas
-      ref={ref}
-      className="fixed inset-0 w-full h-full -z-10 scale-110"
-      style={{ filter: "blur(40px)" }}
-    />
-  );
-});
+export const BackgroundCanvas = memo(
+  forwardRef<HTMLCanvasElement>((_props, ref) => {
+    return (
+      <canvas
+        ref={ref}
+        className="pointer-events-none fixed inset-0 w-full h-full -z-10 scale-110"
+        style={{ filter: "blur(40px)" }}
+      />
+    );
+  }),
+);
 
 BackgroundCanvas.displayName = "BackgroundCanvas";
diff --git a/app/aweme/[awemeId]/components/CommentList.tsx b/app/aweme/[awemeId]/components/CommentList.tsx
index 80ebc63..fa5c365 100644
--- a/app/aweme/[awemeId]/components/CommentList.tsx
+++ b/app/aweme/[awemeId]/components/CommentList.tsx
@@ -1,7 +1,7 @@
 import { ThumbsUp, X } from "lucide-react";
-import { useState } from "react";
+import { memo, useState } from "react";
 import type { Comment, User } from "../types.ts";
-import { formatRelativeTime, formatAbsoluteUTC } from "../utils";
+import { formatAbsoluteUTC, formatRelativeTime } from "../utils";
 import { CommentText } from "./CommentText";
 
 interface CommentListProps {
@@ -10,7 +10,11 @@ interface CommentListProps {
   comments: Comment[];
 }
 
-export function CommentList({ author, createdAt, comments }: CommentListProps) {
+export const CommentList = memo(function CommentList({
+  author,
+  createdAt,
+  comments,
+}: CommentListProps) {
   const [previewImage, setPreviewImage] = useState<string | null>(null);
 
   return (
@@ -21,6 +25,8 @@ export function CommentList({ author, createdAt, comments }: CommentListProps) {
             <img
               src={author.avatar_url}
               alt="avatar"
+              loading="lazy"
+              decoding="async"
               className="w-full h-full object-cover"
             />
           ) : null}
@@ -46,6 +52,8 @@ export function CommentList({ author, createdAt, comments }: CommentListProps) {
                 <img
                   src={c.user.avatar_url}
                   alt="avatar"
+                  loading="lazy"
+                  decoding="async"
                   className="w-full h-full object-cover"
                 />
               ) : null}
@@ -66,13 +74,12 @@ export function CommentList({ author, createdAt, comments }: CommentListProps) {
                 <div className="mt-2 grid grid-cols-3 gap-1.5 sm:gap-2">
                   {c.images.map((img, idx) => (
                     <button
-                      key={idx}
+                      key={`${c.cid}-img-${idx}`}
                       type="button"
                       onClick={() => setPreviewImage(img.url)}
                       className="block overflow-hidden rounded-md bg-zinc-800/60 cursor-pointer hover:opacity-80 transition-opacity"
                       title="点击预览大图"
                     >
-                      {/* 以真实比例显示：利用 width/height 属性提供固有尺寸，CSS 设定宽度 100% 高度自适应 */}
                       <img
                         src={img.url}
                         alt="comment-image"
@@ -80,6 +87,7 @@ export function CommentList({ author, createdAt, comments }: CommentListProps) {
                         height={img.height}
                         className="w-full h-auto"
                         loading="lazy"
+                        decoding="async"
                       />
                     </button>
                   ))}
@@ -100,10 +108,9 @@ export function CommentList({ author, createdAt, comments }: CommentListProps) {
       {/* 图片预览灯箱 */}
       {previewImage && (
         <div
-          className="fixed inset-0 z-[100] flex items-center justify-center bg-black/90 backdrop-blur-sm"
+          className="fixed inset-0 z-[100] flex items-center justify-center bg-black/90"
           onClick={() => setPreviewImage(null)}
         >
-          {/* 关闭按钮 */}
           <button
             type="button"
             className="absolute top-4 right-4 w-10 h-10 rounded-full bg-white/15 text-white border border-white/20 hover:bg-white/25 transition-colors flex items-center justify-center"
@@ -113,7 +120,6 @@ export function CommentList({ author, createdAt, comments }: CommentListProps) {
             <X size={20} />
           </button>
 
-          {/* 大图 */}
           <img
             src={previewImage}
             alt="preview"
@@ -124,4 +130,4 @@ export function CommentList({ author, createdAt, comments }: CommentListProps) {
       )}
     </>
   );
-}
+});
diff --git a/app/aweme/[awemeId]/components/CommentPanel.tsx b/app/aweme/[awemeId]/components/CommentPanel.tsx
index 2e5ff7c..63f8a4c 100644
--- a/app/aweme/[awemeId]/components/CommentPanel.tsx
+++ b/app/aweme/[awemeId]/components/CommentPanel.tsx
@@ -1,5 +1,5 @@
 import { X } from "lucide-react";
-import { useState, useEffect, useRef, useCallback } from "react";
+import { memo, useCallback, useEffect, useRef, useState } from "react";
 import type { Comment, User } from "../types.ts";
 import { CommentList } from "./CommentList";
 
@@ -12,7 +12,16 @@ interface CommentPanelProps {
   mounted: boolean;
 }
 
-export function CommentPanel({
+interface CommentsApiResponse {
+  comments?: Comment[];
+  total?: number;
+  hasMore?: boolean;
+  mode?: string;
+  seed?: string | number;
+  snapshot?: string | number;
+}
+
+export const CommentPanel = memo(function CommentPanel({
   open,
   onClose,
   author,
@@ -24,264 +33,198 @@ export function CommentPanel({
   const [total, setTotal] = useState(0);
   const [loading, setLoading] = useState(false);
   const [hasMore, setHasMore] = useState(true);
-  // ranked 排序的稳定参数（由后端返回，前端透传保证会话内稳定）
-  const [rankParams, setRankParams] = useState<null | {
-    seed: string;
-    snapshot: string;
-  }>(null);
-  // 两套滚动容器与哨兵，分别对应横屏与竖屏面板
-  const scrollRefLandscape = useRef<HTMLDivElement>(null);
-  const sentinelRefLandscape = useRef<HTMLDivElement>(null);
-  const scrollRefPortrait = useRef<HTMLDivElement>(null);
-  const sentinelRefPortrait = useRef<HTMLDivElement>(null);
+  const [hasOpened, setHasOpened] = useState(open);
+
+  const scrollRef = useRef<HTMLDivElement>(null);
+  const sentinelRef = useRef<HTMLDivElement>(null);
   const loadingRef = useRef(false);
+  const abortControllerRef = useRef<AbortController | null>(null);
+  const commentsCountRef = useRef(0);
+  const hasMoreRef = useRef(true);
+  const rankParamsRef = useRef<{ seed: string; snapshot: string } | null>(null);
+
+  useEffect(() => {
+    if (open) setHasOpened(true);
+  }, [open]);
 
-  // 加载评论
   const loadComments = useCallback(
-    async (reset = false) => {
-      if (loadingRef.current || (!reset && !hasMore)) return;
+    async (reset = false): Promise<void> => {
+      if (loadingRef.current && !reset) return;
+      if (!reset && !hasMoreRef.current) return;
+
+      abortControllerRef.current?.abort();
+      const controller = new AbortController();
+      abortControllerRef.current = controller;
 
       loadingRef.current = true;
       setLoading(true);
 
       try {
-        const skip = reset ? 0 : comments.length;
+        const skip = reset ? 0 : commentsCountRef.current;
         const query = new URLSearchParams({
           skip: String(skip),
           take: String(20),
           mode: "ranked",
         });
-        if (rankParams) {
-          query.set("seed", rankParams.seed);
-          query.set("snapshot", rankParams.snapshot);
+        const currentRank = reset ? null : rankParamsRef.current;
+        if (currentRank) {
+          query.set("seed", currentRank.seed);
+          query.set("snapshot", currentRank.snapshot);
         }
+
         const response = await fetch(
           `/api/comments/${awemeId}?${query.toString()}`,
+          { signal: controller.signal },
         );
-        const data = await response.json();
+        const data = (await response.json()) as CommentsApiResponse;
+        if (controller.signal.aborted) return;
 
-        // 统一做一次基于 cid 的去重，避免分页偶发重复
-        if (reset) {
-          setComments(() => {
-            const seen = new Set<string>();
-            return (data.comments as Comment[]).filter((c) => {
-              if (seen.has(c.cid)) return false;
-              seen.add(c.cid);
-              return true;
-            });
+        const incoming = Array.isArray(data.comments) ? data.comments : [];
+
+        setComments((prev) => {
+          const source = reset ? incoming : [...prev, ...incoming];
+          const seen = new Set<string>();
+          const deduped = source.filter((c) => {
+            if (seen.has(c.cid)) return false;
+            seen.add(c.cid);
+            return true;
           });
-        } else {
-          setComments((prev) => {
-            const merged = [...prev, ...(data.comments as Comment[])];
-            const seen = new Set<string>();
-            // 保留首次出现的项，既保证顺序也避免重复
-            return merged.filter((c) => {
-              if (seen.has(c.cid)) return false;
-              seen.add(c.cid);
-              return true;
-            });
-          });
-        }
+          commentsCountRef.current = deduped.length;
+          return deduped;
+        });
+
+        setTotal(typeof data.total === "number" ? data.total : 0);
+        const nextHasMore = Boolean(data.hasMore);
+        hasMoreRef.current = nextHasMore;
+        setHasMore(nextHasMore);
 
-        setTotal(data.total);
-        setHasMore(data.hasMore);
         if (data.mode === "ranked" && data.seed && data.snapshot) {
-          // 初始化或重置时更新稳定参数
-          setRankParams((prev) => {
-            if (reset)
-              return {
-                seed: String(data.seed),
-                snapshot: String(data.snapshot),
-              };
-            return (
-              prev ?? {
-                seed: String(data.seed),
-                snapshot: String(data.snapshot),
-              }
-            );
-          });
+          if (reset || !rankParamsRef.current) {
+            rankParamsRef.current = {
+              seed: String(data.seed),
+              snapshot: String(data.snapshot),
+            };
+          }
         } else if (reset) {
-          setRankParams(null);
+          rankParamsRef.current = null;
         }
       } catch (error) {
+        if (error instanceof DOMException && error.name === "AbortError") {
+          return;
+        }
         console.error("加载评论失败:", error);
       } finally {
-        setLoading(false);
-        loadingRef.current = false;
+        if (abortControllerRef.current === controller) {
+          setLoading(false);
+          loadingRef.current = false;
+        }
       }
     },
-    [awemeId, comments.length, hasMore],
+    [awemeId],
   );
 
-  // 面板打开时加载初始评论
+  // 切换作品时清理旧评论状态与未完成请求
   useEffect(() => {
-    if (open && comments.length === 0) {
-      loadComments(true);
+    abortControllerRef.current?.abort();
+    loadingRef.current = false;
+    commentsCountRef.current = 0;
+    hasMoreRef.current = true;
+    rankParamsRef.current = null;
+    setComments([]);
+    setTotal(0);
+    setHasMore(true);
+    setLoading(false);
+
+    if (open) {
+      void loadComments(true);
     }
-  }, [open]);
-
-  // Intersection Observer 监听底部触发加载（针对横屏与竖屏两个容器分别监听）
-  useEffect(() => {
-    if (!open) return;
-
-    const observers: IntersectionObserver[] = [];
-
-    const setup = (
-      rootEl: HTMLDivElement | null,
-      targetEl: HTMLDivElement | null,
-    ) => {
-      if (!rootEl || !targetEl) return;
-      const io = new IntersectionObserver(
-        (entries) => {
-          const entry = entries[0];
-          if (entry.isIntersecting && !loadingRef.current && hasMore) {
-            loadComments();
-          }
-        },
-        {
-          root: rootEl,
-          rootMargin: "0px 0px 200px 0px", // 距底部 200px 触发
-          threshold: 0,
-        },
-      );
-      io.observe(targetEl);
-      observers.push(io);
-    };
-
-    setup(scrollRefLandscape.current, sentinelRefLandscape.current);
-    setup(scrollRefPortrait.current, sentinelRefPortrait.current);
 
     return () => {
-      for (const io of observers) io.disconnect();
+      abortControllerRef.current?.abort();
     };
+  }, [awemeId, open, loadComments]);
+
+  // Intersection Observer 监听底部触发分页加载（单容器）
+  useEffect(() => {
+    if (!open) return;
+    const rootEl = scrollRef.current;
+    const targetEl = sentinelRef.current;
+    if (!rootEl || !targetEl) return;
+
+    const io = new IntersectionObserver(
+      (entries) => {
+        const entry = entries[0];
+        if (
+          entry?.isIntersecting &&
+          !loadingRef.current &&
+          hasMoreRef.current
+        ) {
+          void loadComments(false);
+        }
+      },
+      {
+        root: rootEl,
+        rootMargin: "0px 0px 200px 0px",
+        threshold: 0,
+      },
+    );
+
+    io.observe(targetEl);
+    return () => io.disconnect();
   }, [open, hasMore, loadComments]);
+
   return (
-    <>
-      <style jsx global>{`
-        /* 自定义滚动条样式 */
-        .comment-scroll::-webkit-scrollbar {
-          width: 6px;
+    <aside
+      className={`
+        z-30 flex flex-col bg-[rgba(22,22,22,0.92)] text-white overflow-hidden
+        fixed inset-x-0 bottom-0 w-full h-[min(80vh,88dvh)] border-t border-white/10
+        landscape:relative landscape:inset-auto landscape:h-full landscape:translate-y-0 landscape:border-t-0
+        ${mounted ? "transition-transform landscape:transition-[width] duration-200 ease-out" : ""}
+        ${
+          open
+            ? "translate-y-0 pointer-events-auto landscape:w-[min(420px,36vw)] landscape:border-l landscape:border-white/10"
+            : "translate-y-full pointer-events-none landscape:w-0 landscape:border-l-0"
         }
-        
-        .comment-scroll::-webkit-scrollbar-track {
-          background: transparent;
-        }
-        
-        .comment-scroll::-webkit-scrollbar-thumb {
-          background: rgba(255, 255, 255, 0.2);
-          border-radius: 3px;
-          transition: background 0.2s;
-        }
-        
-        .comment-scroll::-webkit-scrollbar-thumb:hover {
-          background: rgba(255, 255, 255, 0.3);
-        }
-
-        /* Firefox */
-        .comment-scroll {
-          scrollbar-width: thin;
-          scrollbar-color: rgba(255, 255, 255, 0.2) transparent;
-        }
-      `}</style>
-
-      {/* 横屏评论面板：并排分栏 */}
-      <aside
-        className={`
-          hidden landscape:flex
-          z-30 flex-col bg-[rgba(22,22,22,0.92)] text-white
-          relative h-full overflow-hidden
-          ${mounted ? "transition-[width] duration-200 ease-out" : ""}
-          ${open ? "w-[min(420px,36vw)] border-l border-white/10" : "w-0"}
-        `}
-      >
-        <div className="flex items-center justify-between px-3 py-3 border-b border-white/10">
-          <button
-            className="w-8 h-8 inline-flex items-center justify-center rounded-full bg-white/15 text-white/90 border border-white/20 hover:bg-white/25 transition-colors"
-            onClick={onClose}
-            aria-label="关闭评论"
-          >
-            <X size={18} />
-          </button>
-          <div className="text-white font-semibold">
-            评论 {total > 0 ? `(${total})` : ""}
-          </div>
+      `}
+    >
+      <div className="flex items-center justify-between landscape:flex-row-reverse px-3 py-3 border-b border-white/10 shrink-0">
+        <div className="text-white font-semibold">
+          评论 {total > 0 ? `(${total})` : ""}
         </div>
-
-        <div
-          ref={scrollRefLandscape}
-          className="p-3 overflow-auto comment-scroll"
+        <button
+          type="button"
+          className="w-8 h-8 inline-flex items-center justify-center rounded-full bg-white/15 text-white/90 border border-white/20 hover:bg-white/25 transition-colors cursor-pointer"
+          onClick={onClose}
+          aria-label="关闭评论"
         >
-          <CommentList
-            author={author}
-            createdAt={createdAt}
-            comments={comments}
-          />
+          <X size={18} />
+        </button>
+      </div>
 
-          {/* 底部加载触发区 */}
-          {hasMore && <div ref={sentinelRefLandscape} className="h-1 w-full" />}
+      <div ref={scrollRef} className="p-3 overflow-auto comment-scroll flex-1">
+        {(open || hasOpened) && (
+          <>
+            <CommentList
+              author={author}
+              createdAt={createdAt}
+              comments={comments}
+            />
 
-          {loading && (
-            <div className="py-4 text-center text-white/60 text-sm">
-              加载中...
-            </div>
-          )}
-          {!hasMore && comments.length > 0 && (
-            <div className="py-4 text-center text-white/40 text-sm">
-              没有更多评论了
-            </div>
-          )}
-        </div>
-      </aside>
+            {hasMore && <div ref={sentinelRef} className="h-1 w-full" />}
 
-      {/* 竖屏评论面板：bottom sheet */}
-      <aside
-        className={`
-          landscape:hidden
-          z-30 flex flex-col bg-[rgba(22,22,22,0.92)] text-white
-          fixed inset-x-0 bottom-0 w-full h-[min(80vh,88dvh)]
-          ${mounted ? "transition-transform duration-200 ease-out" : ""}
-          border-t border-white/10
-          ${open ? "translate-y-0" : "translate-y-full"}
-        `}
-      >
-        <div className="flex items-center justify-between px-3 py-3 border-b border-white/10">
-          <div className="text-white font-semibold">
-            评论 {total > 0 ? `(${total})` : ""}
-          </div>
-          <button
-            className="w-8 h-8 inline-flex items-center justify-center rounded-full bg-white/15 text-white/90 border border-white/20 hover:bg-white/25 transition-colors"
-            onClick={onClose}
-            aria-label="关闭评论"
-          >
-            <X size={18} />
-          </button>
-        </div>
-
-        <div
-          ref={scrollRefPortrait}
-          className="p-3 overflow-auto comment-scroll"
-        >
-          <CommentList
-            author={author}
-            createdAt={createdAt}
-            comments={comments}
-          />
-
-          {/* 底部加载触发区 */}
-          {hasMore && <div ref={sentinelRefPortrait} className="h-1 w-full" />}
-
-          {loading && (
-            <div className="py-4 text-center text-white/60 text-sm">
-              加载中...
-            </div>
-          )}
-          {!hasMore && comments.length > 0 && (
-            <div className="py-4 text-center text-white/40 text-sm">
-              没有更多评论了
-            </div>
-          )}
-        </div>
-      </aside>
-    </>
+            {loading && (
+              <div className="py-4 text-center text-white/60 text-sm">
+                加载中...
+              </div>
+            )}
+            {!hasMore && comments.length > 0 && (
+              <div className="py-4 text-center text-white/40 text-sm">
+                没有更多评论了
+              </div>
+            )}
+          </>
+        )}
+      </div>
+    </aside>
   );
-}
+});
diff --git a/app/aweme/[awemeId]/components/ImageCarousel.tsx b/app/aweme/[awemeId]/components/ImageCarousel.tsx
index de54fc4..82f7b03 100644
--- a/app/aweme/[awemeId]/components/ImageCarousel.tsx
+++ b/app/aweme/[awemeId]/components/ImageCarousel.tsx
@@ -1,233 +1,482 @@
 import {
   forwardRef,
+  memo,
+  type RefObject,
   useCallback,
   useEffect,
   useMemo,
   useRef,
   useState,
 } from "react";
-import type { ImageData, LoopMode } from "../types.ts";
+import type { ImageData, LoopMode, ObjectFit } from "../types.ts";
+import { releaseMediaElement } from "../utils";
 
 interface ImageCarouselProps {
   images: ImageData["images"];
   currentIndex: number;
   isPlaying: boolean;
-  segmentProgress: number;
+  segmentProgressRef: RefObject<number>;
   mediaSyncToken: number;
   loopMode: LoopMode;
+  hasNextNeighbor: boolean;
+  rotation: number;
+  objectFit: ObjectFit;
+  failedAnimatedMap: Record<string, boolean>;
   onTogglePlay: () => void;
-  onAnimatedDuration?: (imageId: string, durationMs: number) => void;
+  onAnimatedDuration: (imageId: string, durationMs: number) => void;
+  onMediaReady: (imageId: string) => void;
+  onAnimatedFailed: (imageId: string) => void;
+  onAnimatedProgress: (imageId: string, progress: number) => void;
+  onAnimatedEnded: (imageId: string) => void;
 }
 
-export const ImageCarousel = forwardRef<HTMLDivElement, ImageCarouselProps>(
-  (
-    {
-      images,
-      currentIndex,
-      isPlaying,
-      segmentProgress,
-      mediaSyncToken,
-      loopMode,
-      onTogglePlay,
-      onAnimatedDuration,
-    },
-    ref,
-  ) => {
-    const videoRefs = useRef<Map<string, HTMLVideoElement>>(new Map());
-    const activeVideoIdRef = useRef<string | null>(null);
-    const segmentProgressRef = useRef(segmentProgress);
-    const [useLightweightMode, setUseLightweightMode] = useState(false);
-
-    useEffect(() => {
-      segmentProgressRef.current = segmentProgress;
-    }, [segmentProgress]);
-
-    const syncVideoToSegmentProgress = useCallback(
-      (videoEl: HTMLVideoElement, progress: number, force = false) => {
-        const duration = videoEl.duration;
-        if (!Number.isFinite(duration) || duration <= 0) return;
-
-        const clampedProgress = Math.max(0, Math.min(1, progress));
-        const maxTime = Math.max(0, duration - 0.05);
-        const targetTime = Math.min(maxTime, duration * clampedProgress);
-
-        if (force || Math.abs(videoEl.currentTime - targetTime) > 0.12) {
-          try {
-            videoEl.currentTime = targetTime;
-          } catch {}
-        }
+export const ImageCarousel = memo(
+  forwardRef<HTMLDivElement, ImageCarouselProps>(
+    (
+      {
+        images,
+        currentIndex,
+        isPlaying,
+        segmentProgressRef,
+        mediaSyncToken,
+        loopMode,
+        hasNextNeighbor,
+        rotation,
+        objectFit,
+        failedAnimatedMap,
+        onTogglePlay,
+        onAnimatedDuration,
+        onMediaReady,
+        onAnimatedFailed,
+        onAnimatedProgress,
+        onAnimatedEnded,
       },
-      [],
-    );
+      ref,
+    ) => {
+      const videoRefs = useRef<Map<string, HTMLVideoElement>>(new Map());
+      const activeVideoIdRef = useRef<string | null>(null);
+      const lastMediaSyncTokenRef = useRef(mediaSyncToken);
+      const pendingSeekRef = useRef<{
+        imageId: string;
+        progress: number;
+      } | null>(null);
+      const [readyVideoId, setReadyVideoId] = useState<string | null>(null);
 
-    useEffect(() => {
-      const userAgent = navigator.userAgent;
-      const isIOS =
-        /iPad|iPhone|iPod/.test(userAgent) ||
-        (navigator.platform === "MacIntel" && navigator.maxTouchPoints > 1);
-      const isSafari =
-        /Safari/.test(userAgent) && !/CriOS|FxiOS|EdgiOS/.test(userAgent);
-      setUseLightweightMode(isIOS && isSafari);
-    }, []);
+      const shouldLoopCurrentVideo =
+        loopMode === "single" ||
+        (images.length === 1 &&
+          (loopMode !== "sequential" || !hasNextNeighbor));
 
-    // 虚拟滚动：只渲染当前图片和前后各一张
-    const visibleIndices = useMemo(() => {
-      if (useLightweightMode) return [currentIndex];
+      const seekVideoToProgress = useCallback(
+        (videoEl: HTMLVideoElement, progress: number): boolean => {
+          const duration = videoEl.duration;
+          if (!Number.isFinite(duration) || duration <= 0) return false;
 
-      const indices: number[] = [];
-      if (currentIndex > 0) indices.push(currentIndex - 1);
-      indices.push(currentIndex);
-      if (currentIndex < images.length - 1) indices.push(currentIndex + 1);
-      return indices;
-    }, [currentIndex, images.length, useLightweightMode]);
+          const clampedProgress = Math.max(0, Math.min(1, progress));
+          const maxTime = Math.max(0, duration - 0.05);
+          const targetTime = Math.min(maxTime, duration * clampedProgress);
 
-    // iOS Safari 对多个同屏 video 很敏感，这里只让当前动图持有 video 元素并跟随全局播放状态。
-    useEffect(() => {
-      const currentImage = images[currentIndex];
-      if (!currentImage?.animated) {
-        activeVideoIdRef.current = null;
-        videoRefs.current.forEach((videoEl) => videoEl.pause());
-        return;
-      }
+          if (Math.abs(videoEl.currentTime - targetTime) > 0.08) {
+            try {
+              videoEl.currentTime = targetTime;
+            } catch {
+              return false;
+            }
+          }
+          return true;
+        },
+        [],
+      );
 
-      const videoEl = videoRefs.current.get(currentImage.id);
+      const tryPlayVideo = useCallback(
+        (videoEl: HTMLVideoElement, imageId: string): void => {
+          videoEl.play().catch((err: unknown) => {
+            const errorName = err instanceof DOMException ? err.name : "";
+            if (
+              errorName === "NotAllowedError" ||
+              errorName === "NotSupportedError"
+            ) {
+              onAnimatedFailed(imageId);
+            }
+          });
+        },
+        [onAnimatedFailed],
+      );
 
-      videoRefs.current.forEach((itemVideoEl, imageId) => {
-        if (imageId !== currentImage.id || !isPlaying) {
-          itemVideoEl.pause();
+      // 虚拟窗口：同时渲染前一张、当前张、后一张静态图以保证切页无白屏，同时仅当前张挂载单个 <video>
+      const visibleIndices = useMemo((): number[] => {
+        const indices: number[] = [];
+        if (currentIndex > 0) indices.push(currentIndex - 1);
+        if (currentIndex >= 0 && currentIndex < images.length) {
+          indices.push(currentIndex);
         }
-      });
+        if (currentIndex < images.length - 1) indices.push(currentIndex + 1);
+        return indices;
+      }, [currentIndex, images.length]);
+
+      // 组件卸载时释放所有残留的 <video> 硬件解码缓冲
+      useEffect(() => {
+        const map = videoRefs.current;
+        return () => {
+          map.forEach((videoEl) => {
+            releaseMediaElement(videoEl);
+          });
+          map.clear();
+        };
+      }, []);
+
+      // 管理当前动图的播放、暂停与切换
+      useEffect(() => {
+        const currentImage = images[currentIndex];
+        const isAnimated =
+          Boolean(currentImage?.animated) &&
+          !failedAnimatedMap[currentImage?.id ?? ""];
+
+        if (!currentImage || !isAnimated) {
+          activeVideoIdRef.current = null;
+          videoRefs.current.forEach((videoEl) => {
+            videoEl.pause();
+          });
+          return;
+        }
+
+        const videoEl = videoRefs.current.get(currentImage.id);
+
+        videoRefs.current.forEach((itemVideoEl, imageId) => {
+          if (imageId !== currentImage.id || !isPlaying) {
+            itemVideoEl.pause();
+          }
+        });
+
+        if (!videoEl) return;
+
+        videoEl.loop = shouldLoopCurrentVideo;
 
-      if (videoEl) {
         if (activeVideoIdRef.current !== currentImage.id) {
           activeVideoIdRef.current = currentImage.id;
-          syncVideoToSegmentProgress(videoEl, segmentProgressRef.current, true);
+          const initialProgress = segmentProgressRef.current;
+          if (initialProgress > 0.01) {
+            const applied = seekVideoToProgress(videoEl, initialProgress);
+            if (!applied) {
+              pendingSeekRef.current = {
+                imageId: currentImage.id,
+                progress: initialProgress,
+              };
+            }
+          } else {
+            pendingSeekRef.current = null;
+            if (videoEl.currentTime > 0.05) {
+              try {
+                videoEl.currentTime = 0;
+              } catch {}
+            }
+          }
+        } else if (
+          isPlaying &&
+          (videoEl.ended ||
+            (Number.isFinite(videoEl.duration) &&
+              videoEl.duration > 0 &&
+              videoEl.currentTime >= videoEl.duration - 0.05))
+        ) {
+          try {
+            videoEl.currentTime = 0;
+          } catch {}
         }
 
         if (isPlaying) {
-          videoEl.play().catch(() => {});
+          tryPlayVideo(videoEl, currentImage.id);
         } else {
           videoEl.pause();
         }
-      }
-    }, [currentIndex, images, isPlaying, loopMode, syncVideoToSegmentProgress]);
+      }, [
+        currentIndex,
+        failedAnimatedMap,
+        images,
+        isPlaying,
+        seekVideoToProgress,
+        segmentProgressRef,
+        shouldLoopCurrentVideo,
+        tryPlayVideo,
+      ]);
 
-    useEffect(() => {
-      const currentImage = images[currentIndex];
-      if (!currentImage?.animated) return;
+      // 响应用户主动 Seek 或外部强制同步
+      useEffect(() => {
+        if (lastMediaSyncTokenRef.current === mediaSyncToken) return;
+        lastMediaSyncTokenRef.current = mediaSyncToken;
 
-      const videoEl = videoRefs.current.get(currentImage.id);
-      if (!videoEl) return;
+        const currentImage = images[currentIndex];
+        if (!currentImage?.animated || failedAnimatedMap[currentImage.id]) {
+          return;
+        }
 
-      syncVideoToSegmentProgress(videoEl, segmentProgressRef.current, true);
-      if (isPlaying) videoEl.play().catch(() => {});
-    }, [
-      currentIndex,
-      images,
-      isPlaying,
-      loopMode,
-      mediaSyncToken,
-      syncVideoToSegmentProgress,
-    ]);
+        const targetProgress = segmentProgressRef.current;
+        const videoEl = videoRefs.current.get(currentImage.id);
+        if (!videoEl) {
+          pendingSeekRef.current = {
+            imageId: currentImage.id,
+            progress: targetProgress,
+          };
+          return;
+        }
 
-    const handleVideoRef = (el: HTMLVideoElement | null, imageId: string) => {
-      if (el) {
-        videoRefs.current.set(imageId, el);
-      } else {
-        videoRefs.current.delete(imageId);
-      }
-    };
+        const applied = seekVideoToProgress(videoEl, targetProgress);
+        if (applied) {
+          pendingSeekRef.current = null;
+        } else {
+          pendingSeekRef.current = {
+            imageId: currentImage.id,
+            progress: targetProgress,
+          };
+        }
 
-    return (
-      <div ref={ref} className="relative h-full w-full overflow-hidden">
-        <div className="relative h-full w-full">
-          {visibleIndices.map((i) => {
-            const img = images[i];
-            const isCurrent = i === currentIndex;
-            const animatedSrc = isCurrent ? img.animated : null;
-            return (
-              <div
-                key={img.id}
-                data-active={isCurrent ? "true" : undefined}
-                className="absolute inset-0 h-full w-full flex items-center justify-center bg-black/70 cursor-pointer"
-                style={{
-                  transform: useLightweightMode
-                    ? "translateX(0)"
-                    : `translateX(${(i - currentIndex) * 100}%)`,
-                  transition: useLightweightMode
-                    ? "none"
-                    : "transform 240ms ease-out",
-                  zIndex: isCurrent ? 1 : 0,
-                }}
-                onClick={onTogglePlay}
-              >
-                {animatedSrc ? (
-                  <video
-                    ref={(el) => handleVideoRef(el, img.id)}
-                    src={animatedSrc}
-                    poster={img.url}
-                    muted
-                    playsInline
-                    loop={loopMode === "single"}
-                    preload={useLightweightMode ? "none" : "metadata"}
-                    controls={false}
-                    disablePictureInPicture
-                    className="max-w-full max-h-full object-contain"
-                    style={{
-                      width: img.width ? `${img.width}px` : undefined,
-                      height: img.height ? `${img.height}px` : undefined,
-                    }}
-                    onLoadedMetadata={(e) => {
-                      const duration = e.currentTarget.duration;
-                      if (Number.isFinite(duration) && duration > 0) {
-                        onAnimatedDuration?.(
-                          img.id,
-                          Math.round(duration * 1000),
-                        );
-                        if (isCurrent) {
-                          syncVideoToSegmentProgress(
-                            e.currentTarget,
-                            segmentProgressRef.current,
-                            true,
-                          );
-                        }
-                      }
-                    }}
-                    onCanPlay={(e) => {
-                      if (isCurrent) {
-                        syncVideoToSegmentProgress(
-                          e.currentTarget,
-                          segmentProgressRef.current,
-                        );
-                      }
-                      if (isCurrent && isPlaying)
-                        e.currentTarget.play().catch(() => {});
-                    }}
-                    onEnded={(e) => {
-                      // 播放结束后停留在最后一帧
-                      if (loopMode !== "single") e.currentTarget.pause();
-                    }}
-                  />
-                ) : (
+        if (isPlaying) {
+          tryPlayVideo(videoEl, currentImage.id);
+        }
+      }, [
+        currentIndex,
+        failedAnimatedMap,
+        images,
+        isPlaying,
+        mediaSyncToken,
+        seekVideoToProgress,
+        segmentProgressRef,
+        tryPlayVideo,
+      ]);
+
+      // 使用 rAF 跟踪当前动图真实播放进度，只有动图实际走帧时进度条才前进
+      useEffect(() => {
+        if (!isPlaying) return;
+        const currentImage = images[currentIndex];
+        if (!currentImage?.animated || failedAnimatedMap[currentImage.id]) {
+          return;
+        }
+
+        let rafId: number | null = null;
+        const imageId = currentImage.id;
+
+        const updateLoop = (): void => {
+          const videoEl = videoRefs.current.get(imageId);
+          if (videoEl) {
+            const duration = videoEl.duration;
+            if (Number.isFinite(duration) && duration > 0 && !videoEl.paused) {
+              const progress = Math.max(
+                0,
+                Math.min(1, videoEl.currentTime / duration),
+              );
+              onAnimatedProgress(imageId, progress);
+            }
+          }
+          rafId = window.requestAnimationFrame(updateLoop);
+        };
+
+        rafId = window.requestAnimationFrame(updateLoop);
+        return () => {
+          if (rafId !== null) {
+            window.cancelAnimationFrame(rafId);
+          }
+        };
+      }, [
+        currentIndex,
+        failedAnimatedMap,
+        images,
+        isPlaying,
+        onAnimatedProgress,
+      ]);
+
+      const handleVideoRef = useCallback(
+        (el: HTMLVideoElement | null, imageId: string): void => {
+          if (el) {
+            videoRefs.current.set(imageId, el);
+            if (Number.isFinite(el.duration) && el.duration > 0) {
+              onAnimatedDuration(imageId, Math.round(el.duration * 1000));
+            }
+            if (el.readyState >= 2) {
+              setReadyVideoId(imageId);
+            }
+          } else {
+            const prevEl = videoRefs.current.get(imageId);
+            if (prevEl) {
+              releaseMediaElement(prevEl);
+              videoRefs.current.delete(imageId);
+            }
+            setReadyVideoId((current) =>
+              current === imageId ? null : current,
+            );
+          }
+        },
+        [onAnimatedDuration],
+      );
+
+      const handleImgRef = useCallback(
+        (el: HTMLImageElement | null, imageId: string): void => {
+          if (el?.complete) {
+            onMediaReady(imageId);
+          }
+        },
+        [onMediaReady],
+      );
+
+      const mediaStyle = useMemo(
+        () => ({
+          transform:
+            rotation % 180 === 0
+              ? `rotate(${rotation}deg)`
+              : `rotate(${rotation}deg) scale(0.85)`,
+          objectFit,
+        }),
+        [objectFit, rotation],
+      );
+
+      return (
+        <div ref={ref} className="relative h-full w-full overflow-hidden">
+          <div className="relative h-full w-full">
+            {visibleIndices.map((i) => {
+              const img = images[i];
+              if (!img) return null;
+              const isCurrent = i === currentIndex;
+              const canShowAnimated =
+                isCurrent &&
+                Boolean(img.animated) &&
+                !failedAnimatedMap[img.id];
+              const animatedSrc = canShowAnimated ? img.animated : null;
+              const isVideoVisible = canShowAnimated && readyVideoId === img.id;
+
+              return (
+                <div
+                  key={img.id}
+                  data-active={isCurrent ? "true" : undefined}
+                  className="absolute inset-0 h-full w-full flex items-center justify-center bg-black/70 cursor-pointer"
+                  style={{
+                    transform: `translateX(${(i - currentIndex) * 100}%)`,
+                    transition: "transform 240ms ease-out",
+                    zIndex: isCurrent ? 1 : 0,
+                  }}
+                  onClick={onTogglePlay}
+                >
+                  {/* 底层静态图：作为静态页本体及动图首帧就绪前的无缝封面 */}
                   <img
+                    ref={(el) => handleImgRef(el, img.id)}
                     src={img.url}
                     alt={`image-${i + 1}`}
-                    loading={isCurrent ? "eager" : "lazy"}
+                    loading="eager"
                     decoding="async"
-                    className="max-w-full max-h-full object-contain"
+                    onLoad={() => onMediaReady(img.id)}
+                    onError={() => onMediaReady(img.id)}
+                    className={`max-w-full max-h-full transition-opacity duration-150 ${
+                      isVideoVisible ? "opacity-0" : "opacity-100"
+                    }`}
                     style={{
                       width: img.width ? `${img.width}px` : undefined,
                       height: img.height ? `${img.height}px` : undefined,
+                      ...mediaStyle,
                     }}
                   />
-                )}
-              </div>
-            );
-          })}
+
+                  {/* 仅当前激活页挂载单个 <video>，避免 iOS 多解码器并发卡死 */}
+                  {animatedSrc ? (
+                    <video
+                      ref={(el) => handleVideoRef(el, img.id)}
+                      src={animatedSrc}
+                      muted
+                      playsInline
+                      loop={shouldLoopCurrentVideo}
+                      preload="auto"
+                      controls={false}
+                      disablePictureInPicture
+                      className={`absolute max-w-full max-h-full transition-opacity duration-150 ${
+                        isVideoVisible ? "opacity-100" : "opacity-0"
+                      }`}
+                      style={{
+                        width: img.width ? `${img.width}px` : undefined,
+                        height: img.height ? `${img.height}px` : undefined,
+                        ...mediaStyle,
+                      }}
+                      onLoadedMetadata={(e) => {
+                        const duration = e.currentTarget.duration;
+                        if (Number.isFinite(duration) && duration > 0) {
+                          onAnimatedDuration(
+                            img.id,
+                            Math.round(duration * 1000),
+                          );
+                          if (
+                            pendingSeekRef.current &&
+                            pendingSeekRef.current.imageId === img.id
+                          ) {
+                            const applied = seekVideoToProgress(
+                              e.currentTarget,
+                              pendingSeekRef.current.progress,
+                            );
+                            if (applied) {
+                              pendingSeekRef.current = null;
+                            }
+                          }
+                        }
+                      }}
+                      onLoadedData={() => {
+                        setReadyVideoId(img.id);
+                        onMediaReady(img.id);
+                      }}
+                      onCanPlay={(e) => {
+                        setReadyVideoId(img.id);
+                        onMediaReady(img.id);
+                        if (
+                          pendingSeekRef.current &&
+                          pendingSeekRef.current.imageId === img.id
+                        ) {
+                          const applied = seekVideoToProgress(
+                            e.currentTarget,
+                            pendingSeekRef.current.progress,
+                          );
+                          if (applied) {
+                            pendingSeekRef.current = null;
+                          }
+                        }
+                        if (isCurrent && isPlaying && e.currentTarget.paused) {
+                          tryPlayVideo(e.currentTarget, img.id);
+                        }
+                      }}
+                      onTimeUpdate={(e) => {
+                        const duration = e.currentTarget.duration;
+                        if (Number.isFinite(duration) && duration > 0) {
+                          onAnimatedProgress(
+                            img.id,
+                            Math.max(
+                              0,
+                              Math.min(
+                                1,
+                                e.currentTarget.currentTime / duration,
+                              ),
+                            ),
+                          );
+                        }
+                      }}
+                      onEnded={(e) => {
+                        if (shouldLoopCurrentVideo) {
+                          try {
+                            e.currentTarget.currentTime = 0;
+                          } catch {}
+                          if (isPlaying) {
+                            tryPlayVideo(e.currentTarget, img.id);
+                          }
+                          onAnimatedEnded(img.id);
+                          return;
+                        }
+                        e.currentTarget.pause();
+                        onAnimatedEnded(img.id);
+                      }}
+                      onError={() => {
+                        onAnimatedFailed(img.id);
+                      }}
+                    />
+                  ) : null}
+                </div>
+              );
+            })}
+          </div>
         </div>
-      </div>
-    );
-  },
+      );
+    },
+  ),
 );
 
 ImageCarousel.displayName = "ImageCarousel";
diff --git a/app/aweme/[awemeId]/components/ImageNavigationButtons.tsx b/app/aweme/[awemeId]/components/ImageNavigationButtons.tsx
index 9826c39..15a2e0c 100644
--- a/app/aweme/[awemeId]/components/ImageNavigationButtons.tsx
+++ b/app/aweme/[awemeId]/components/ImageNavigationButtons.tsx
@@ -1,4 +1,5 @@
 import { ChevronLeft, ChevronRight } from "lucide-react";
+import { memo } from "react";
 
 interface ImageNavigationButtonsProps {
   onPrev: () => void;
@@ -7,7 +8,7 @@ interface ImageNavigationButtonsProps {
   totalImages: number;
 }
 
-export function ImageNavigationButtons({
+export const ImageNavigationButtons = memo(function ImageNavigationButtons({
   onPrev,
   onNext,
   currentIndex,
@@ -20,13 +21,14 @@ export function ImageNavigationButtons({
     <>
       {/* 左侧按钮 */}
       <button
+        type="button"
         className={`
           absolute left-4 top-6/17 -translate-y-1/2 z-20
           w-12 h-12 rounded-full
-          bg-black/40 backdrop-blur-sm border border-white/20
+          bg-black/55 border border-white/20
           flex items-center justify-center
-          text-white transition-all
-          ${hasPrev ? "opacity-100 hover:bg-black/60 cursor-pointer" : "opacity-30 cursor-not-allowed"}
+          text-white transition-opacity
+          ${hasPrev ? "opacity-100 hover:bg-black/70 cursor-pointer" : "opacity-30 cursor-not-allowed"}
         `}
         onClick={onPrev}
         disabled={!hasPrev}
@@ -37,13 +39,14 @@ export function ImageNavigationButtons({
 
       {/* 右侧按钮 */}
       <button
+        type="button"
         className={`
           absolute right-4 top-6/17 -translate-y-1/2 z-20
           w-12 h-12 rounded-full
-          bg-black/40 backdrop-blur-sm border border-white/20
+          bg-black/55 border border-white/20
           flex items-center justify-center
-          text-white transition-all
-          ${hasNext ? "opacity-100 hover:bg-black/60 cursor-pointer" : "opacity-30 cursor-not-allowed"}
+          text-white transition-opacity
+          ${hasNext ? "opacity-100 hover:bg-black/70 cursor-pointer" : "opacity-30 cursor-not-allowed"}
         `}
         onClick={onNext}
         disabled={!hasNext}
@@ -53,4 +56,4 @@ export function ImageNavigationButtons({
       </button>
     </>
   );
-}
+});
diff --git a/app/aweme/[awemeId]/components/MediaControls.tsx b/app/aweme/[awemeId]/components/MediaControls.tsx
index 6a51884..339d683 100644
--- a/app/aweme/[awemeId]/components/MediaControls.tsx
+++ b/app/aweme/[awemeId]/components/MediaControls.tsx
@@ -1,7 +1,7 @@
-import Link from "next/link";
 import {
   ArrowDownUp,
   Download,
+  FileText,
   Maximize,
   Maximize2,
   Minimize,
@@ -14,14 +14,14 @@ import {
   RotateCw,
   Volume2,
   VolumeX,
-  FileText,
 } from "lucide-react";
-import type { RefObject } from "react";
+import Link from "next/link";
+import { memo, type ReactNode, type RefObject } from "react";
 import type { LoopMode, ObjectFit, User } from "../types.ts";
-import { formatRelativeTime, formatTime, formatAbsoluteUTC } from "../utils";
+import { formatAbsoluteUTC, formatRelativeTime, formatTime } from "../utils";
+import { MoreMenu, MoreMenuItem } from "./MoreMenu";
 import { ProgressBar } from "./ProgressBar";
 import { SegmentedProgressBar } from "./SegmentedProgressBar";
-import { MoreMenu, MoreMenuItem } from "./MoreMenu";
 
 interface MediaControlsProps {
   isVideo: boolean;
@@ -59,7 +59,10 @@ interface MediaControlsProps {
   onToggleFullscreen: () => void;
 }
 
-export function MediaControls({
+const CONTROL_BTN_CLASS =
+  "w-[34px] h-[34px] inline-flex items-center justify-center rounded-full bg-white/15 text-white border border-white/20 cursor-pointer hover:bg-white/25 transition-colors";
+
+export const MediaControls = memo(function MediaControls({
   isVideo,
   isPlaying,
   progress,
@@ -101,7 +104,7 @@ export function MediaControls({
       : loopMode === "loop"
         ? "图文循环"
         : "顺序播放";
-  const handleLoopModeToggle = () => {
+  const handleLoopModeToggle = (): void => {
     if (isVideo) {
       onLoopModeChange(normalizedLoopMode === "loop" ? "sequential" : "loop");
       return;
@@ -115,7 +118,7 @@ export function MediaControls({
           : "loop",
     );
   };
-  const renderLoopIcon = () => {
+  const renderLoopIcon = (): ReactNode => {
     if (!isVideo && loopMode === "single") return <Repeat1 size={18} />;
     if (normalizedLoopMode === "loop") return <Repeat size={18} />;
     return <ArrowDownUp size={18} />;
@@ -131,7 +134,7 @@ export function MediaControls({
             className="flex items-center gap-2.5 pointer-events-auto hover:opacity-80 transition-opacity"
           >
             <img
-              src={author.avatar_url!}
+              src={author.avatar_url ?? ""}
               alt=""
               className="w-8 h-8 rounded-full"
             />
@@ -142,7 +145,7 @@ export function MediaControls({
         ) : (
           <div className="flex items-center gap-2.5">
             <img
-              src={author.avatar_url!}
+              src={author.avatar_url ?? ""}
               alt=""
               className="w-8 h-8 rounded-full"
             />
@@ -187,7 +190,8 @@ export function MediaControls({
         {/* 左侧：播放控制 + 时间/进度 */}
         <div className="inline-flex items-center gap-1.5 sm:gap-2 min-w-0">
           <button
-            className="w-[34px] h-[34px] shrink-0 inline-flex items-center justify-center rounded-full bg-white/15 text-white border border-white/20 backdrop-blur-sm cursor-pointer"
+            type="button"
+            className={`${CONTROL_BTN_CLASS} shrink-0`}
             onClick={onTogglePlay}
             aria-label={isPlaying ? "暂停" : "播放"}
           >
@@ -211,7 +215,8 @@ export function MediaControls({
           {/* 倍速 - 中等屏幕以上显示，仅视频 */}
           {isVideo && (
             <button
-              className="hidden md:block h-[30px] px-[10px] rounded-full text-[12px] bg-white/15 text-white border border-white/20 backdrop-blur-sm cursor-pointer shrink-0"
+              type="button"
+              className="hidden md:block h-[30px] px-[10px] rounded-full text-[12px] bg-white/15 text-white border border-white/20 cursor-pointer shrink-0 hover:bg-white/25 transition-colors"
               onClick={() => {
                 const steps = [1, 1.25, 1.5, 2, 0.75, 0.5];
                 const i = steps.indexOf(rate);
@@ -229,7 +234,8 @@ export function MediaControls({
         <div className="hidden md:inline-flex items-center gap-2 shrink-0">
           {/* 旋转按钮 - 小屏幕以上显示 */}
           <button
-            className="hidden sm:inline-flex w-[34px] h-[34px] items-center justify-center rounded-full bg-white/15 text-white border border-white/20 backdrop-blur-sm cursor-pointer"
+            type="button"
+            className={`hidden sm:inline-flex ${CONTROL_BTN_CLASS}`}
             onClick={() => onRotationChange((rotation + 270) % 360)}
             aria-label="向左旋转 90 度"
             title="向左旋转 90 度"
@@ -237,7 +243,8 @@ export function MediaControls({
             <RotateCcw size={18} />
           </button>
           <button
-            className="w-[34px] h-[34px] inline-flex items-center justify-center rounded-full bg-white/15 text-white border border-white/20 backdrop-blur-sm cursor-pointer"
+            type="button"
+            className={CONTROL_BTN_CLASS}
             onClick={() => onVolumeChange(volume > 0 ? 0 : 1)}
             aria-label={volume > 0 ? "静音" : "取消静音"}
           >
@@ -254,7 +261,8 @@ export function MediaControls({
             aria-label="音量"
           />
           <button
-            className="hidden sm:inline-flex w-[34px] h-[34px] items-center justify-center rounded-full bg-white/15 text-white border border-white/20 backdrop-blur-sm cursor-pointer"
+            type="button"
+            className={`hidden sm:inline-flex ${CONTROL_BTN_CLASS}`}
             onClick={() => onRotationChange((rotation + 90) % 360)}
             aria-label="向右旋转 90 度"
             title="向右旋转 90 度"
@@ -267,7 +275,8 @@ export function MediaControls({
         <div className="inline-flex items-center gap-1 sm:gap-1.5 lg:gap-2 shrink-0">
           {/* 音量按钮 - 仅在小屏幕显示（中等屏幕以上有滑块） */}
           <button
-            className="md:hidden w-[34px] h-[34px] inline-flex items-center justify-center rounded-full bg-white/15 text-white border border-white/20 backdrop-blur-sm cursor-pointer"
+            type="button"
+            className={`md:hidden ${CONTROL_BTN_CLASS}`}
             onClick={() => onVolumeChange(volume > 0 ? 0 : 1)}
             aria-label={volume > 0 ? "静音" : "取消静音"}
           >
@@ -276,7 +285,8 @@ export function MediaControls({
 
           {/* 循环模式 - 中等屏幕以上显示 */}
           <button
-            className="hidden md:inline-flex w-[34px] h-[34px] items-center justify-center rounded-full bg-white/15 text-white border border-white/20 backdrop-blur-sm cursor-pointer"
+            type="button"
+            className={`hidden md:inline-flex ${CONTROL_BTN_CLASS}`}
             onClick={handleLoopModeToggle}
             aria-label={loopLabel}
             title={loopLabel}
@@ -286,7 +296,8 @@ export function MediaControls({
 
           {/* 适配模式 - 小屏幕以上显示 */}
           <button
-            className="hidden sm:inline-flex w-[34px] h-[34px] items-center justify-center rounded-full bg-white/15 text-white border border-white/20 backdrop-blur-sm cursor-pointer"
+            type="button"
+            className={`hidden sm:inline-flex ${CONTROL_BTN_CLASS}`}
             onClick={() =>
               onObjectFitChange(objectFit === "contain" ? "cover" : "contain")
             }
@@ -307,7 +318,8 @@ export function MediaControls({
           {/* 转录文本 - 仅视频且有转录时显示，中等屏幕以上 */}
           {isVideo && hasTranscript && onShowTranscript && (
             <button
-              className="hidden md:inline-flex w-[34px] h-[34px] items-center justify-center rounded-full bg-white/15 text-white border border-white/20 backdrop-blur-sm cursor-pointer"
+              type="button"
+              className={`hidden md:inline-flex ${CONTROL_BTN_CLASS}`}
               onClick={onShowTranscript}
               aria-label="显示转录文本"
               title="显示转录文本"
@@ -318,7 +330,8 @@ export function MediaControls({
 
           {/* 下载 - 中等屏幕以上显示 */}
           <button
-            className="hidden md:inline-flex w-[34px] h-[34px] items-center justify-center rounded-full bg-white/15 text-white border border-white/20 backdrop-blur-sm cursor-pointer"
+            type="button"
+            className={`hidden md:inline-flex ${CONTROL_BTN_CLASS}`}
             onClick={onDownload}
             aria-label={isVideo ? "下载视频" : "下载当前图片"}
             title={isVideo ? "下载视频" : "下载当前图片"}
@@ -327,10 +340,8 @@ export function MediaControls({
           </button>
 
           {/* 更多菜单 - 只在有按钮被折叠时显示 */}
-          {/* sm屏幕以下会隐藏适配模式，md屏幕以下会隐藏循环、转录、下载、倍速 */}
           <div className="sm:block md:hidden">
             <MoreMenu>
-              {/* 小屏幕隐藏的适配模式 */}
               <div className="sm:hidden">
                 <MoreMenuItem
                   icon={
@@ -349,7 +360,6 @@ export function MediaControls({
                 />
               </div>
 
-              {/* 中等屏幕以下隐藏的循环模式 */}
               <div className="md:hidden">
                 <MoreMenuItem
                   icon={renderLoopIcon()}
@@ -358,7 +368,6 @@ export function MediaControls({
                 />
               </div>
 
-              {/* 中等屏幕以下隐藏的转录按钮 */}
               {isVideo && hasTranscript && onShowTranscript && (
                 <div className="md:hidden">
                   <MoreMenuItem
@@ -369,7 +378,6 @@ export function MediaControls({
                 </div>
               )}
 
-              {/* 中等屏幕以下隐藏的下载 */}
               <div className="md:hidden">
                 <MoreMenuItem
                   icon={<Download size={18} />}
@@ -378,7 +386,6 @@ export function MediaControls({
                 />
               </div>
 
-              {/* 仅在视频模式下显示的倍速（中等屏幕以下） */}
               {isVideo && (
                 <div className="md:hidden">
                   <MoreMenuItem
@@ -398,7 +405,8 @@ export function MediaControls({
 
           {/* 全屏 - 所有设备都显示 */}
           <button
-            className="w-[34px] h-[34px] inline-flex items-center justify-center rounded-full bg-white/15 text-white border border-white/20 backdrop-blur-sm cursor-pointer"
+            type="button"
+            className={CONTROL_BTN_CLASS}
             onClick={onToggleFullscreen}
             aria-label="切换全屏"
           >
@@ -413,4 +421,4 @@ export function MediaControls({
       ) : null}
     </div>
   );
-}
+});
diff --git a/app/aweme/[awemeId]/components/NavigationButtons.tsx b/app/aweme/[awemeId]/components/NavigationButtons.tsx
index a838eff..7c68444 100644
--- a/app/aweme/[awemeId]/components/NavigationButtons.tsx
+++ b/app/aweme/[awemeId]/components/NavigationButtons.tsx
@@ -4,6 +4,7 @@ import {
   MessageSquareText,
   ThumbsUp,
 } from "lucide-react";
+import { memo } from "react";
 import type { Neighbors } from "../types.ts";
 
 interface NavigationButtonsProps {
@@ -15,7 +16,7 @@ interface NavigationButtonsProps {
   onToggleComments: () => void;
 }
 
-export function NavigationButtons({
+export const NavigationButtons = memo(function NavigationButtons({
   neighbors,
   commentsCount,
   likesCount,
@@ -26,7 +27,10 @@ export function NavigationButtons({
   return (
     <>
       <div className="absolute right-4 top-8/14 flex flex-col items-center gap-8 z-10">
-        <button className="grid place-items-center w-[54px] h-[54px] rounded-full -translate-y-1/2">
+        <button
+          type="button"
+          className="grid place-items-center w-[54px] h-[54px] rounded-full -translate-y-1/2"
+        >
           <div className="grid place-items-center gap-1 drop-shadow-lg">
             <ThumbsUp size={40} className="" />
 
@@ -37,6 +41,7 @@ export function NavigationButtons({
         </button>
         {/* 评论开关（右侧中部） */}
         <button
+          type="button"
           className="grid place-items-center w-[54px] h-[54px] rounded-full -translate-y-1/2 cursor-pointer"
           onClick={onToggleComments}
           aria-label="切换评论"
@@ -59,8 +64,9 @@ export function NavigationButtons({
 
       {/* 上下切换按钮（右侧胶囊形状） */}
       <div className="absolute right-4 top-5/11 -translate-y-1/2 z-10">
-        <div className="flex flex-col rounded-full bg-black/40 backdrop-blur-sm border border-white/20 overflow-hidden">
+        <div className="flex flex-col rounded-full bg-black/55 border border-white/20 overflow-hidden">
           <button
+            type="button"
             className="w-[44px] h-[44px] inline-flex items-center justify-center text-white disabled:opacity-40 cursor-pointer disabled:cursor-not-allowed hover:bg-white/10 transition-colors"
             onClick={onNavigatePrev}
             disabled={!neighbors.prev}
@@ -69,6 +75,7 @@ export function NavigationButtons({
             <ChevronUp size={24} />
           </button>
           <button
+            type="button"
             className="w-[44px] h-[44px] inline-flex items-center justify-center text-white disabled:opacity-40 cursor-pointer disabled:cursor-not-allowed hover:bg-white/10 transition-colors border-t border-white/20"
             onClick={onNavigateNext}
             disabled={!neighbors.next}
@@ -80,4 +87,4 @@ export function NavigationButtons({
       </div>
     </>
   );
-}
+});
diff --git a/app/aweme/[awemeId]/components/ProgressBar.tsx b/app/aweme/[awemeId]/components/ProgressBar.tsx
index e20ff56..2dc38e4 100644
--- a/app/aweme/[awemeId]/components/ProgressBar.tsx
+++ b/app/aweme/[awemeId]/components/ProgressBar.tsx
@@ -1,11 +1,17 @@
+import { memo } from "react";
+
 interface ProgressBarProps {
   progress: number;
   onSeek: (ratio: number) => void;
 }
 
-export function ProgressBar({ progress, onSeek }: ProgressBarProps) {
-  const seekFromClientX = (clientX: number, element: HTMLElement) => {
+export const ProgressBar = memo(function ProgressBar({
+  progress,
+  onSeek,
+}: ProgressBarProps) {
+  const seekFromClientX = (clientX: number, element: HTMLElement): void => {
     const rect = element.getBoundingClientRect();
+    if (rect.width <= 0) return;
     onSeek((clientX - rect.left) / rect.width);
   };
 
@@ -36,9 +42,9 @@ export function ProgressBar({ progress, onSeek }: ProgressBarProps) {
       }}
     >
       <div
-        className="origin-left h-full bg-white"
+        className="origin-left h-full bg-white will-change-transform"
         style={{ transform: `scaleX(${progress || 0})` }}
       />
     </div>
   );
-}
+});
diff --git a/app/aweme/[awemeId]/components/SegmentedProgressBar.tsx b/app/aweme/[awemeId]/components/SegmentedProgressBar.tsx
index c3e131d..8f2502b 100644
--- a/app/aweme/[awemeId]/components/SegmentedProgressBar.tsx
+++ b/app/aweme/[awemeId]/components/SegmentedProgressBar.tsx
@@ -1,3 +1,5 @@
+import { memo } from "react";
+
 interface SegmentedProgressBarProps {
   totalSegments: number;
   currentIndex: number;
@@ -5,14 +7,37 @@ interface SegmentedProgressBarProps {
   onSeek: (ratio: number) => void;
 }
 
-export function SegmentedProgressBar({
+const SegmentBarItem = memo(function SegmentBarItem({
+  index,
+  fill,
+}: {
+  index: number;
+  fill: number;
+}) {
+  return (
+    <div
+      aria-label={`第 ${index + 1} 段`}
+      className="relative flex-1 h-full rounded-full bg-white/25 overflow-hidden"
+    >
+      <div
+        className="h-full origin-left bg-white will-change-transform"
+        style={{
+          transform: `scaleX(${Math.max(0, Math.min(1, fill))})`,
+        }}
+      />
+    </div>
+  );
+});
+
+export const SegmentedProgressBar = memo(function SegmentedProgressBar({
   totalSegments,
   currentIndex,
   segmentProgress,
   onSeek,
 }: SegmentedProgressBarProps) {
-  const seekFromClientX = (clientX: number, element: HTMLElement) => {
+  const seekFromClientX = (clientX: number, element: HTMLElement): void => {
     const rect = element.getBoundingClientRect();
+    if (rect.width <= 0) return;
     onSeek((clientX - rect.left) / rect.width);
   };
 
@@ -47,22 +72,9 @@ export function SegmentedProgressBar({
           let fill = 0;
           if (i < currentIndex) fill = 1;
           else if (i === currentIndex) fill = segmentProgress;
-          return (
-            <div
-              key={i}
-              aria-label={`第 ${i + 1} 段`}
-              className="relative flex-1 h-full rounded-full bg-white/25 overflow-hidden"
-            >
-              <div
-                className="h-full origin-left bg-white"
-                style={{
-                  transform: `scaleX(${Math.max(0, Math.min(1, fill))})`,
-                }}
-              />
-            </div>
-          );
+          return <SegmentBarItem key={`seg-${i}`} index={i} fill={fill} />;
         })}
       </div>
     </div>
   );
-}
+});
diff --git a/app/aweme/[awemeId]/components/TranscriptPanel.tsx b/app/aweme/[awemeId]/components/TranscriptPanel.tsx
index bdd30b9..06afe78 100644
--- a/app/aweme/[awemeId]/components/TranscriptPanel.tsx
+++ b/app/aweme/[awemeId]/components/TranscriptPanel.tsx
@@ -1,7 +1,7 @@
 "use client";
 
-import { X, Copy, CheckCheck, Check } from "lucide-react";
-import { useState } from "react";
+import { Check, CheckCheck, Copy, X } from "lucide-react";
+import { memo, useEffect, useRef, useState } from "react";
 import type { VideoTranscript } from "../types";
 
 interface TranscriptPanelProps {
@@ -10,46 +10,59 @@ interface TranscriptPanelProps {
   transcript: VideoTranscript | null;
 }
 
-export function TranscriptPanel({
+export const TranscriptPanel = memo(function TranscriptPanel({
   open,
   onClose,
   transcript,
 }: TranscriptPanelProps) {
   const [copiedIndex, setCopiedIndex] = useState<number | null>(null);
   const [copiedAll, setCopiedAll] = useState(false);
+  const copyTimerRef = useRef<ReturnType<typeof setTimeout> | null>(null);
+  const copyAllTimerRef = useRef<ReturnType<typeof setTimeout> | null>(null);
+
+  useEffect(() => {
+    return () => {
+      if (copyTimerRef.current !== null) clearTimeout(copyTimerRef.current);
+      if (copyAllTimerRef.current !== null)
+        clearTimeout(copyAllTimerRef.current);
+    };
+  }, []);
 
   if (!open) return null;
 
-  const handleCopy = (text: string, index: number) => {
-    navigator.clipboard.writeText(text).then(() => {
+  const handleCopy = (text: string, index: number): void => {
+    void navigator.clipboard.writeText(text).then(() => {
       setCopiedIndex(index);
-      setTimeout(() => setCopiedIndex(null), 2000);
+      if (copyTimerRef.current !== null) clearTimeout(copyTimerRef.current);
+      copyTimerRef.current = setTimeout(() => setCopiedIndex(null), 2000);
     });
   };
 
-  const handleCopyAll = () => {
+  const handleCopyAll = (): void => {
     if (!transcript?.transcript) return;
     const allText = transcript.transcript.join("\n");
-    navigator.clipboard.writeText(allText).then(() => {
+    void navigator.clipboard.writeText(allText).then(() => {
       setCopiedAll(true);
-      setTimeout(() => setCopiedAll(false), 2000);
+      if (copyAllTimerRef.current !== null)
+        clearTimeout(copyAllTimerRef.current);
+      copyAllTimerRef.current = setTimeout(() => setCopiedAll(false), 2000);
     });
   };
 
   if (!transcript?.transcript?.length) {
     return (
       <div
-        className="fixed inset-0 z-50 flex items-center justify-center bg-black/60 backdrop-blur-sm"
+        className="fixed inset-0 z-50 flex items-center justify-center bg-black/70"
         onClick={onClose}
       >
         <div
-          className="relative w-full max-w-2xl max-h-[80vh] m-4 bg-zinc-900/95 backdrop-blur-xl border border-white/10 rounded-2xl shadow-2xl"
+          className="relative w-full max-w-2xl max-h-[80vh] m-4 bg-zinc-900/95 border border-white/10 rounded-2xl shadow-2xl"
           onClick={(e) => e.stopPropagation()}
         >
-          {/* 头部 */}
           <div className="flex items-center justify-between p-4 border-b border-white/10">
             <h2 className="text-lg font-semibold text-white">语音转录</h2>
             <button
+              type="button"
               onClick={onClose}
               className="p-2 rounded-full hover:bg-white/10 transition-colors"
               aria-label="关闭"
@@ -58,7 +71,6 @@ export function TranscriptPanel({
             </button>
           </div>
 
-          {/* 内容 */}
           <div className="p-8 text-center text-white/60">
             <p>{transcript ? "未识别到文字" : "该视频尚未转写"}</p>
           </div>
@@ -69,21 +81,20 @@ export function TranscriptPanel({
 
   return (
     <div
-      className="fixed inset-0 z-50 flex items-center justify-center bg-black/60 backdrop-blur-sm"
+      className="fixed inset-0 z-50 flex items-center justify-center bg-black/70"
       onClick={onClose}
     >
       <div
-        className="relative w-full max-w-2xl max-h-[80vh] m-4 bg-zinc-900/95 backdrop-blur-xl border border-white/10 rounded-2xl shadow-2xl flex flex-col"
+        className="relative w-full max-w-2xl max-h-[80vh] m-4 bg-zinc-900/95 border border-white/10 rounded-2xl shadow-2xl flex flex-col"
         onClick={(e) => e.stopPropagation()}
       >
-        {/* 头部 */}
         <div className="flex items-center justify-between p-4 border-b border-white/10 flex-shrink-0">
           <div>
             <h2 className="text-lg font-semibold text-white">语音转录</h2>
-
           </div>
           <div className="flex items-center gap-2">
             <button
+              type="button"
               onClick={handleCopyAll}
               className="flex items-center gap-2 px-3 py-2 text-sm bg-blue-600/20 text-blue-300 rounded-lg hover:bg-blue-600/30 transition-colors"
             >
@@ -100,6 +111,7 @@ export function TranscriptPanel({
               )}
             </button>
             <button
+              type="button"
               onClick={onClose}
               className="p-2 rounded-full hover:bg-white/10 transition-colors"
               aria-label="关闭"
@@ -109,11 +121,10 @@ export function TranscriptPanel({
           </div>
         </div>
 
-        {/* 转录列表 */}
         <div className="flex-1 overflow-y-auto p-4 space-y-2">
           {transcript.transcript.map((text, index) => (
             <div
-              key={index}
+              key={`transcript-${index}`}
               className="group bg-white/5 rounded-lg p-3 hover:bg-white/10 transition-colors cursor-pointer"
               onClick={() => handleCopy(text, index)}
             >
@@ -129,7 +140,11 @@ export function TranscriptPanel({
                   </p>
                 </div>
                 <button
-                  onClick={() => handleCopy(text, index)}
+                  type="button"
+                  onClick={(e) => {
+                    e.stopPropagation();
+                    handleCopy(text, index);
+                  }}
                   className="flex-shrink-0 p-2 rounded-lg opacity-0 group-hover:opacity-100 hover:bg-white/10 transition-all"
                   aria-label="复制"
                 >
@@ -144,11 +159,10 @@ export function TranscriptPanel({
           ))}
         </div>
 
-        {/* 底部统计 */}
         <div className="flex-shrink-0 p-3 border-t border-white/10 text-center text-xs text-white/50">
           共 {transcript.transcript.length} 段转录内容
         </div>
       </div>
     </div>
   );
-}
+});
diff --git a/app/aweme/[awemeId]/components/VideoPlayer.tsx b/app/aweme/[awemeId]/components/VideoPlayer.tsx
index 1abce9f..7f943bd 100644
--- a/app/aweme/[awemeId]/components/VideoPlayer.tsx
+++ b/app/aweme/[awemeId]/components/VideoPlayer.tsx
@@ -1,4 +1,4 @@
-import { forwardRef } from "react";
+import { forwardRef, memo } from "react";
 import type { ObjectFit } from "../types.ts";
 
 interface VideoPlayerProps {
@@ -9,33 +9,33 @@ interface VideoPlayerProps {
   onTogglePlay: () => void;
 }
 
-export const VideoPlayer = forwardRef<HTMLVideoElement, VideoPlayerProps>(
-  ({ videoUrl, rotation, objectFit, loop, onTogglePlay }, ref) => {
-    return (
-      <video
-        ref={ref}
-        src={videoUrl}
-        className={[
-          // 旋转 0/180：充满容器盒子；
-          // 旋转 90/270：用中心定位 + 100vh/100vw，保证铺满全屏
-          rotation % 180 === 0
-            ? "absolute inset-0 h-full w-full bg-black/70 cursor-pointer"
-            : "absolute top-1/2 left-1/2 h-[100vw] w-[100vh] bg-black/70 cursor-pointer",
-        ].join(" ")}
-        style={{
-          transform:
+export const VideoPlayer = memo(
+  forwardRef<HTMLVideoElement, VideoPlayerProps>(
+    ({ videoUrl, rotation, objectFit, loop, onTogglePlay }, ref) => {
+      return (
+        <video
+          ref={ref}
+          src={videoUrl}
+          className={
             rotation % 180 === 0
-              ? `rotate(${rotation}deg)`
-              : `translate(-50%, -50%) rotate(${rotation}deg)`,
-          transformOrigin: "center center",
-          objectFit,
-        }}
-        playsInline
-        loop={loop}
-        onClick={onTogglePlay}
-      />
-    );
-  },
+              ? "absolute inset-0 h-full w-full bg-black/70 cursor-pointer"
+              : "absolute top-1/2 left-1/2 h-[100vw] w-[100vh] bg-black/70 cursor-pointer"
+          }
+          style={{
+            transform:
+              rotation % 180 === 0
+                ? `rotate(${rotation}deg)`
+                : `translate(-50%, -50%) rotate(${rotation}deg)`,
+            transformOrigin: "center center",
+            objectFit,
+          }}
+          playsInline
+          loop={loop}
+          onClick={onTogglePlay}
+        />
+      );
+    },
+  ),
 );
 
 VideoPlayer.displayName = "VideoPlayer";
diff --git a/app/aweme/[awemeId]/components/VideoTagEditor.tsx b/app/aweme/[awemeId]/components/VideoTagEditor.tsx
index 40e5b7a..4f9e00f 100644
--- a/app/aweme/[awemeId]/components/VideoTagEditor.tsx
+++ b/app/aweme/[awemeId]/components/VideoTagEditor.tsx
@@ -1,7 +1,7 @@
 "use client";
 
 import { Check, Tag, X } from "lucide-react";
-import { useEffect, useState } from "react";
+import { memo, useEffect, useState } from "react";
 import { VIDEO_CONTENT_TAGS } from "@/lib/video-tags";
 
 type TagUpdateResponse = {
@@ -18,7 +18,7 @@ type VideoTagEditorProps = {
   onTagsChange: (tags: string[]) => void;
 };
 
-export function VideoTagEditor({
+export const VideoTagEditor = memo(function VideoTagEditor({
   awemeId,
   tags,
   onTagsChange,
@@ -32,7 +32,7 @@ export function VideoTagEditor({
     if (!open) setDraftTags(tags);
   }, [open, tags]);
 
-  const toggleTag = (tag: string) => {
+  const toggleTag = (tag: string): void => {
     setDraftTags((current) =>
       current.includes(tag)
         ? current.filter((item) => item !== tag)
@@ -40,7 +40,7 @@ export function VideoTagEditor({
     );
   };
 
-  const saveTags = async () => {
+  const saveTags = async (): Promise<void> => {
     setSaving(true);
     setError(null);
     try {
@@ -70,7 +70,7 @@ export function VideoTagEditor({
       <button
         type="button"
         onClick={() => setOpen((value) => !value)}
-        className="inline-flex h-9 items-center gap-2 rounded-full border border-white/20 bg-black/35 px-3 text-sm font-medium text-white shadow-lg backdrop-blur transition-colors hover:bg-black/50"
+        className="inline-flex h-9 items-center gap-2 rounded-full border border-white/20 bg-black/55 px-3 text-sm font-medium text-white shadow-lg transition-colors hover:bg-black/70"
         aria-expanded={open}
       >
         <Tag size={16} />
@@ -78,7 +78,7 @@ export function VideoTagEditor({
       </button>
 
       {open && (
-        <div className="w-[min(92vw,24rem)] rounded-xl border border-white/15 bg-zinc-950/92 p-3 text-white shadow-2xl backdrop-blur-xl">
+        <div className="w-[min(92vw,24rem)] rounded-xl border border-white/15 bg-zinc-950/95 p-3 text-white shadow-2xl">
           <div className="mb-3 flex items-center justify-between gap-3">
             <div className="text-sm font-medium">手动标签</div>
             <button
@@ -135,4 +135,4 @@ export function VideoTagEditor({
       )}
     </div>
   );
-}
+});
diff --git a/app/aweme/[awemeId]/hooks/useBackgroundCanvas.ts b/app/aweme/[awemeId]/hooks/useBackgroundCanvas.ts
index 9593e8c..45eb541 100644
--- a/app/aweme/[awemeId]/hooks/useBackgroundCanvas.ts
+++ b/app/aweme/[awemeId]/hooks/useBackgroundCanvas.ts
@@ -1,74 +1,90 @@
-import { useEffect } from "react";
 import type { RefObject } from "react";
+import { useEffect } from "react";
 
 interface UseBackgroundCanvasProps {
   isVideo: boolean;
-  idx: number;
+  isPlaying: boolean;
   videoRef: RefObject<HTMLVideoElement | null>;
-  scrollerRef: RefObject<HTMLDivElement | null>;
   backgroundCanvasRef: RefObject<HTMLCanvasElement | null>;
 }
 
+const CANVAS_DRAW_INTERVAL_MS = 100; // 10fps 对 1/10 分辨率 + blur(40px) 已完全平滑，大幅降低 GPU 负载
+
 export function useBackgroundCanvas({
   isVideo,
-  idx,
+  isPlaying,
   videoRef,
-  scrollerRef,
   backgroundCanvasRef,
-}: UseBackgroundCanvasProps) {
+}: UseBackgroundCanvasProps): void {
+  // 初始化尺寸与卸载清理
   useEffect(() => {
     const canvas = backgroundCanvasRef.current;
     if (!canvas) return;
 
     const ctx = canvas.getContext("2d");
-    if (!ctx) return;
-
-    if (!isVideo) {
-      canvas.width = 1;
-      canvas.height = 1;
-      ctx.clearRect(0, 0, 1, 1);
+    if (!ctx || !isVideo) {
+      canvas.width = 0;
+      canvas.height = 0;
       return;
     }
 
-    const updateCanvasSize = () => {
-      canvas.width = Math.floor(window.innerWidth / 10);
-      canvas.height = Math.floor(window.innerHeight / 10);
+    const updateCanvasSize = (): void => {
+      canvas.width = Math.max(1, Math.floor(window.innerWidth / 10));
+      canvas.height = Math.max(1, Math.floor(window.innerHeight / 10));
     };
     updateCanvasSize();
 
-    let resizeTimeout: NodeJS.Timeout;
-    const debouncedResize = () => {
-      clearTimeout(resizeTimeout);
+    let resizeTimeout: ReturnType<typeof setTimeout> | null = null;
+    const debouncedResize = (): void => {
+      if (resizeTimeout !== null) clearTimeout(resizeTimeout);
       resizeTimeout = setTimeout(updateCanvasSize, 300);
     };
     window.addEventListener("resize", debouncedResize);
 
-    const drawMediaToCanvas = () => {
-      if (!ctx) return;
+    return () => {
+      window.removeEventListener("resize", debouncedResize);
+      if (resizeTimeout !== null) clearTimeout(resizeTimeout);
+      ctx.clearRect(0, 0, canvas.width, canvas.height);
+      canvas.width = 0;
+      canvas.height = 0;
+    };
+  }, [isVideo, backgroundCanvasRef]);
 
+  // 仅在视频实际播放时进行低频采样绘制，暂停时不占 CPU/GPU
+  useEffect(() => {
+    if (!isVideo || !isPlaying) return;
+    const canvas = backgroundCanvasRef.current;
+    if (!canvas) return;
+    const ctx = canvas.getContext("2d");
+    if (!ctx) return;
+
+    const drawMediaToCanvas = (): void => {
+      if (document.hidden) return;
       const sourceElement = videoRef.current;
-
       if (
         !sourceElement ||
-        (sourceElement instanceof HTMLVideoElement &&
-          sourceElement.readyState < 2)
-      )
+        sourceElement.readyState < 2 ||
+        sourceElement.paused
+      ) {
         return;
+      }
 
       const canvasWidth = canvas.width;
       const canvasHeight = canvas.height;
       const sourceWidth = sourceElement.videoWidth;
       const sourceHeight = sourceElement.videoHeight;
 
-      if (!sourceWidth || !sourceHeight) return;
+      if (!canvasWidth || !canvasHeight || !sourceWidth || !sourceHeight) {
+        return;
+      }
 
       const canvasRatio = canvasWidth / canvasHeight;
       const sourceRatio = sourceWidth / sourceHeight;
 
-      let drawWidth: number,
-        drawHeight: number,
-        offsetX: number,
-        offsetY: number;
+      let drawWidth: number;
+      let drawHeight: number;
+      let offsetX: number;
+      let offsetY: number;
 
       if (canvasRatio > sourceRatio) {
         drawWidth = canvasWidth;
@@ -85,12 +101,14 @@ export function useBackgroundCanvas({
       ctx.drawImage(sourceElement, offsetX, offsetY, drawWidth, drawHeight);
     };
 
-    const intervalId = setInterval(drawMediaToCanvas, 34);
+    drawMediaToCanvas();
+    const intervalId = window.setInterval(
+      drawMediaToCanvas,
+      CANVAS_DRAW_INTERVAL_MS,
+    );
 
     return () => {
-      clearInterval(intervalId);
-      window.removeEventListener("resize", debouncedResize);
-      clearTimeout(resizeTimeout);
+      window.clearInterval(intervalId);
     };
-  }, [isVideo, idx, videoRef, scrollerRef, backgroundCanvasRef]);
+  }, [isVideo, isPlaying, videoRef, backgroundCanvasRef]);
 }
diff --git a/app/aweme/[awemeId]/hooks/useImageCarousel.ts b/app/aweme/[awemeId]/hooks/useImageCarousel.ts
index 3ffcba6..e42408a 100644
--- a/app/aweme/[awemeId]/hooks/useImageCarousel.ts
+++ b/app/aweme/[awemeId]/hooks/useImageCarousel.ts
@@ -1,16 +1,17 @@
-import { useCallback, useEffect, useMemo, useRef, useState } from "react";
-import type { RefObject } from "react";
 import { useRouter } from "next/navigation";
+import type { RefObject } from "react";
+import { useCallback, useEffect, useMemo, useRef, useState } from "react";
 import type { ImageData, LoopMode, Neighbors } from "../types.ts";
+import { releaseMediaElement } from "../utils";
 
 const MIN_SEGMENT_MS = 250;
 const UI_UPDATE_INTERVAL_MS = 33;
-const PROGRESS_EPSILON = 0.0001;
+const PROGRESS_EPSILON = 0.001;
 
 function normalizeDuration(
   duration: number | null | undefined,
   fallback: number,
-) {
+): number {
   if (
     typeof duration !== "number" ||
     !Number.isFinite(duration) ||
@@ -21,7 +22,7 @@ function normalizeDuration(
   return Math.max(MIN_SEGMENT_MS, Math.round(duration));
 }
 
-function sumDurations(durations: number[], end: number) {
+function sumDurations(durations: number[], end: number): number {
   let total = 0;
   for (let i = 0; i < end; i++) total += durations[i] ?? 0;
   return total;
@@ -39,6 +40,26 @@ interface UseImageCarouselProps {
   segmentMs?: number;
 }
 
+export interface UseImageCarouselReturn {
+  idx: number;
+  setIdx: (idx: number) => void;
+  segProgress: number;
+  segProgressRef: RefObject<number>;
+  segmentDurations: number[];
+  totalDurationMs: number;
+  mediaSyncToken: number;
+  segStartRef: RefObject<number | null>;
+  idxRef: RefObject<number>;
+  failedAnimatedMap: Record<string, boolean>;
+  setSegmentDuration: (imageId: string, durationMs: number) => void;
+  markMediaReady: (imageId: string) => void;
+  markAnimatedFailed: (imageId: string) => void;
+  handleAnimatedProgress: (imageId: string, progress: number) => void;
+  handleAnimatedEnded: (imageId: string) => void;
+  goToIndex: (index: number, segmentProgress?: number) => void;
+  seekTo: (ratio: number) => void;
+}
+
 export function useImageCarousel({
   images,
   isPlaying,
@@ -48,13 +69,19 @@ export function useImageCarousel({
   audioRef,
   setProgress,
   segmentMs = 5000,
-}: UseImageCarouselProps) {
+}: UseImageCarouselProps): UseImageCarouselReturn {
   const router = useRouter();
   const [idx, setIdx] = useState(0);
   const [segProgress, setSegProgress] = useState(0);
   const [durationOverrides, setDurationOverrides] = useState<
     Record<string, number>
   >({});
+  const [readyMediaMap, setReadyMediaMap] = useState<Record<string, boolean>>(
+    {},
+  );
+  const [failedAnimatedMap, setFailedAnimatedMap] = useState<
+    Record<string, boolean>
+  >({});
   const [mediaSyncToken, setMediaSyncToken] = useState(0);
 
   const segStartRef = useRef<number | null>(null);
@@ -85,7 +112,7 @@ export function useImageCarousel({
   );
 
   const syncProgress = useCallback(
-    (index: number, segmentProgress: number, force = false) => {
+    (index: number, segmentProgress: number, force = false): void => {
       const segmentDuration = segmentDurations[index] ?? fallbackDuration;
       const completedMs = sumDurations(segmentDurations, index);
       const totalProgress =
@@ -116,7 +143,7 @@ export function useImageCarousel({
   );
 
   const setSegmentDuration = useCallback(
-    (imageId: string, durationMs: number) => {
+    (imageId: string, durationMs: number): void => {
       if (!Number.isFinite(durationMs) || durationMs <= 0) return;
       const normalizedDuration = normalizeDuration(
         durationMs,
@@ -131,8 +158,95 @@ export function useImageCarousel({
     [fallbackDuration],
   );
 
+  const markMediaReady = useCallback((imageId: string): void => {
+    setReadyMediaMap((current) => {
+      if (current[imageId]) return current;
+      return { ...current, [imageId]: true };
+    });
+  }, []);
+
+  const markAnimatedFailed = useCallback((imageId: string): void => {
+    setFailedAnimatedMap((current) => {
+      if (current[imageId]) return current;
+      return { ...current, [imageId]: true };
+    });
+    setReadyMediaMap((current) => {
+      if (current[imageId]) return current;
+      return { ...current, [imageId]: true };
+    });
+  }, []);
+
+  const advanceSegment = useCallback(
+    (fromIndex: number): void => {
+      if (!images.length || idxRef.current !== fromIndex) return;
+
+      const now = performance.now();
+
+      if (loopMode === "single") {
+        segStartRef.current = now;
+        lastUiUpdateRef.current = now;
+        syncProgress(fromIndex, 0, true);
+        return;
+      }
+
+      if (fromIndex >= images.length - 1) {
+        if (loopMode === "sequential" && neighbors?.next) {
+          router.push(`/aweme/${neighbors.next.aweme_id}`);
+          return;
+        }
+        idxRef.current = 0;
+        setIdx(0);
+        segStartRef.current = now;
+        lastUiUpdateRef.current = now;
+        syncProgress(0, 0, true);
+        if (images.length === 1) {
+          setMediaSyncToken((token) => token + 1);
+        }
+        return;
+      }
+
+      const nextIndex = fromIndex + 1;
+      idxRef.current = nextIndex;
+      setIdx(nextIndex);
+      segStartRef.current = now;
+      lastUiUpdateRef.current = now;
+      syncProgress(nextIndex, 0, true);
+    },
+    [images.length, loopMode, neighbors?.next, router, syncProgress],
+  );
+
+  const handleAnimatedProgress = useCallback(
+    (imageId: string, progress: number): void => {
+      const currentImage = images[idxRef.current];
+      if (!currentImage || currentImage.id !== imageId) return;
+
+      const now = performance.now();
+      const clamped = Math.max(0, Math.min(1, progress));
+      const wrapped = clamped < segProgressRef.current - 0.2;
+
+      if (
+        wrapped ||
+        clamped >= 0.995 ||
+        now - lastUiUpdateRef.current >= UI_UPDATE_INTERVAL_MS
+      ) {
+        lastUiUpdateRef.current = now;
+        syncProgress(idxRef.current, clamped, wrapped);
+      }
+    },
+    [images, syncProgress],
+  );
+
+  const handleAnimatedEnded = useCallback(
+    (imageId: string): void => {
+      const currentImage = images[idxRef.current];
+      if (!currentImage || currentImage.id !== imageId) return;
+      advanceSegment(idxRef.current);
+    },
+    [advanceSegment, images],
+  );
+
   const goToIndex = useCallback(
-    (index: number, segmentProgress = 0) => {
+    (index: number, segmentProgress = 0): void => {
       if (!images.length) return;
 
       const nextIndex = Math.max(0, Math.min(images.length - 1, index));
@@ -151,7 +265,7 @@ export function useImageCarousel({
   );
 
   const seekTo = useCallback(
-    (ratio: number) => {
+    (ratio: number): void => {
       if (!images.length || totalDurationMs <= 0) return;
 
       const clampedRatio = Math.max(0, Math.min(1, ratio));
@@ -197,25 +311,9 @@ export function useImageCarousel({
     idxRef.current = idx;
   }, [idx]);
 
+  // 切换作品或图片集合变化时重置所有轮播状态
   useEffect(() => {
-    const validIds = new Set(images.map((img) => img.id));
-    setDurationOverrides((current) => {
-      let changed = false;
-      const next: Record<string, number> = {};
-
-      for (const [id, duration] of Object.entries(current)) {
-        if (validIds.has(id)) {
-          next[id] = duration;
-        } else {
-          changed = true;
-        }
-      }
-
-      return changed ? next : current;
-    });
-  }, [images]);
-
-  useEffect(() => {
+    if (!imageKey) return;
     idxRef.current = 0;
     setIdx(0);
     segStartRef.current = null;
@@ -223,6 +321,9 @@ export function useImageCarousel({
     totalProgressRef.current = 0;
     setSegProgress(0);
     setProgress(0);
+    setDurationOverrides({});
+    setReadyMediaMap({});
+    setFailedAnimatedMap({});
     setMediaSyncToken((token) => token + 1);
   }, [imageKey, setProgress]);
 
@@ -239,90 +340,77 @@ export function useImageCarousel({
   }, [audioRef, isPlaying, volume]);
 
   useEffect(() => {
+    const el = audioRef.current;
     return () => {
-      audioRef.current?.pause();
+      releaseMediaElement(el);
     };
   }, [audioRef]);
 
-  // 自动切页
+  // 静态图自动切页（仅在当前静态图已加载完成后开始计时；动图由 <video> 自身进度与 onEnded 驱动）
+  const currentImage = images[idx];
+  const isCurrentAnimated =
+    Boolean(currentImage?.animated) &&
+    !failedAnimatedMap[currentImage?.id ?? ""];
+  const isCurrentStaticReady = currentImage
+    ? Boolean(readyMediaMap[currentImage.id])
+    : false;
+
   useEffect(() => {
-    if (!images?.length || !segmentDurations.length || totalDurationMs <= 0)
+    if (!images?.length || !segmentDurations.length || totalDurationMs <= 0) {
       return;
+    }
+
+    // 当前页为正常动图时，交由 ImageCarousel 内 <video> 的真实播放进度和 ended 事件推进
+    if (isCurrentAnimated) {
+      return;
+    }
+
+    // 静态图尚未加载完成或处于暂停态时，冻结分段进度，避免未加载完就偷跑进度裁切展示时长
+    if (!isPlaying || !isCurrentStaticReady) {
+      return;
+    }
 
     const now = performance.now();
-    const currentSegmentDuration =
-      segmentDurations[idxRef.current] ?? fallbackDuration;
+    const currentSegmentDuration = segmentDurations[idx] ?? fallbackDuration;
     segStartRef.current = now - segProgressRef.current * currentSegmentDuration;
+    lastUiUpdateRef.current = now;
 
-    if (!isPlaying) return;
-
-    const tick = () => {
+    const tick = (): void => {
       if (!images?.length) return;
 
       const ts = performance.now();
+      const start = segStartRef.current ?? ts;
+      const activeIdx = idxRef.current;
+      const duration = segmentDurations[activeIdx] ?? fallbackDuration;
+      const elapsed = ts - start;
 
-      let start = segStartRef.current!;
-      let localIdx = idxRef.current;
-
-      let elapsed = ts - start;
-      let currentSegmentDuration =
-        segmentDurations[localIdx] ?? fallbackDuration;
-
-      while (elapsed >= currentSegmentDuration) {
-        if (loopMode === "single") {
-          elapsed %= currentSegmentDuration;
-          break;
-        }
-
-        elapsed -= currentSegmentDuration;
-
-        if (localIdx >= images.length - 1) {
-          if (loopMode === "sequential" && neighbors?.next) {
-            router.push(`/aweme/${neighbors.next.aweme_id}`);
-            return;
-          }
-          localIdx = 0;
-        } else {
-          localIdx = localIdx + 1;
-        }
-
-        currentSegmentDuration = segmentDurations[localIdx] ?? fallbackDuration;
-      }
-      segStartRef.current = ts - elapsed;
-
-      const indexChanged = localIdx !== idxRef.current;
-      if (indexChanged) {
-        idxRef.current = localIdx;
-        setIdx(localIdx);
+      if (elapsed >= duration) {
+        advanceSegment(activeIdx);
+        return;
       }
 
-      const localSeg = Math.max(
-        0,
-        Math.min(1, elapsed / currentSegmentDuration),
-      );
-
-      if (
-        indexChanged ||
-        ts - lastUiUpdateRef.current >= UI_UPDATE_INTERVAL_MS
-      ) {
+      const localSeg = Math.max(0, Math.min(1, elapsed / duration));
+      if (ts - lastUiUpdateRef.current >= UI_UPDATE_INTERVAL_MS) {
         lastUiUpdateRef.current = ts;
-        syncProgress(localIdx, localSeg, indexChanged);
+        syncProgress(activeIdx, localSeg, false);
       }
     };
 
-    tick();
     timerRef.current = window.setInterval(tick, UI_UPDATE_INTERVAL_MS);
     return () => {
-      if (timerRef.current) window.clearInterval(timerRef.current);
-      timerRef.current = null;
+      if (timerRef.current !== null) {
+        window.clearInterval(timerRef.current);
+        timerRef.current = null;
+      }
     };
   }, [
+    advanceSegment,
     fallbackDuration,
+    idx,
     images,
+    isCurrentAnimated,
+    isCurrentStaticReady,
     isPlaying,
-    loopMode,
-    neighbors?.next,
-    router,
     segmentDurations,
     syncProgress,
     totalDurationMs,
@@ -332,12 +420,18 @@ export function useImageCarousel({
     idx,
     setIdx,
     segProgress,
+    segProgressRef,
     segmentDurations,
     totalDurationMs,
     mediaSyncToken,
     segStartRef,
     idxRef,
+    failedAnimatedMap,
     setSegmentDuration,
+    markMediaReady,
+    markAnimatedFailed,
+    handleAnimatedProgress,
+    handleAnimatedEnded,
     goToIndex,
     seekTo,
   };
diff --git a/app/aweme/[awemeId]/hooks/useNavigation.ts b/app/aweme/[awemeId]/hooks/useNavigation.ts
index 25ae50d..4552367 100644
--- a/app/aweme/[awemeId]/hooks/useNavigation.ts
+++ b/app/aweme/[awemeId]/hooks/useNavigation.ts
@@ -1,6 +1,6 @@
-import { useEffect, useRef } from "react";
-import type { RefObject } from "react";
 import { useRouter } from "next/navigation";
+import type { RefObject } from "react";
+import { useEffect, useRef } from "react";
 import type { Neighbors } from "../types.ts";
 
 interface UseNavigationProps {
@@ -21,7 +21,7 @@ export function useNavigation({
   prevImg,
   nextImg,
   togglePlay,
-}: UseNavigationProps) {
+}: UseNavigationProps): void {
   const router = useRouter();
   const wheelCooldownRef = useRef<number>(0);
 
@@ -37,7 +37,7 @@ export function useNavigation({
     const el = mediaContainerRef.current;
     if (!el) return;
 
-    const onWheel = (e: WheelEvent) => {
+    const onWheel = (e: WheelEvent): void => {
       if (e.ctrlKey) return;
       const now = performance.now();
       if (now - wheelCooldownRef.current < 700) return;
@@ -58,17 +58,18 @@ export function useNavigation({
     };
 
     el.addEventListener("wheel", onWheel, { passive: false });
-    return () => el.removeEventListener("wheel", onWheel as any);
+    return () => el.removeEventListener("wheel", onWheel);
   }, [neighbors, mediaContainerRef, router]);
 
   // 键盘快捷键
   useEffect(() => {
-    const onKeyDown = (e: KeyboardEvent) => {
-      const target = e.target as HTMLElement;
+    const onKeyDown = (e: KeyboardEvent): void => {
+      const target = e.target as HTMLElement | null;
       if (
-        target.tagName === "INPUT" ||
-        target.tagName === "TEXTAREA" ||
-        target.isContentEditable
+        target &&
+        (target.tagName === "INPUT" ||
+          target.tagName === "TEXTAREA" ||
+          target.isContentEditable)
       ) {
         return;
       }
@@ -121,17 +122,25 @@ export function useNavigation({
     return () => window.removeEventListener("keydown", onKeyDown);
   }, [isVideo, neighbors, router, videoRef, prevImg, nextImg, togglePlay]);
 
-  // 浏览器返回事件
+  // 仅在无历史记录的独立新标签页首次进入时注入一次返回兜底，避免连续刷视频时无限叠加 history 栈
   useEffect(() => {
-    window.history.pushState({ interceptBack: true }, "");
+    const currentState = window.history.state as
+      | { interceptBack?: boolean }
+      | null
+      | undefined;
+    if (window.history.length <= 1 && !currentState?.interceptBack) {
+      window.history.pushState({ ...currentState, interceptBack: true }, "");
+    }
 
-    const handlePopState = () => {
-      window.close();
-      setTimeout(() => {
-        if (!document.hidden) {
-          router.push("/");
-        }
-      }, 100);
+    const handlePopState = (): void => {
+      if (window.history.length <= 1) {
+        window.close();
+        setTimeout(() => {
+          if (!document.hidden) {
+            router.push("/");
+          }
+        }, 100);
+      }
     };
 
     window.addEventListener("popstate", handlePopState);
diff --git a/app/aweme/[awemeId]/hooks/useVideoPlayer.ts b/app/aweme/[awemeId]/hooks/useVideoPlayer.ts
index 719869c..3aa9544 100644
--- a/app/aweme/[awemeId]/hooks/useVideoPlayer.ts
+++ b/app/aweme/[awemeId]/hooks/useVideoPlayer.ts
@@ -1,7 +1,8 @@
 import { useRouter } from "next/navigation";
 import type { RefObject } from "react";
-import { useEffect } from "react";
+import { useEffect, useRef } from "react";
 import type { LoopMode, Neighbors } from "../types.ts";
+import { cleanupExpiredProgressStorage, releaseMediaElement } from "../utils";
 
 interface UseVideoPlayerProps {
   enabled?: boolean;
@@ -29,18 +30,27 @@ export function useVideoPlayer({
   setIsPlaying,
   setProgress,
   setProgressRestored,
-}: UseVideoPlayerProps) {
+}: UseVideoPlayerProps): void {
   const router = useRouter();
+  const restoredAwemeIdRef = useRef<string | null>(null);
+  const lastProgressRef = useRef(0);
+
+  // 挂载时清理过期的播放进度缓存
+  useEffect(() => {
+    if (!enabled) return;
+    cleanupExpiredProgressStorage();
+  }, [enabled]);
 
   // 恢复播放进度
   useEffect(() => {
     if (!enabled) return;
-    if (progressRestored) return;
+    if (progressRestored && restoredAwemeIdRef.current === awemeId) return;
     const v = videoRef.current;
     if (!v) return;
 
-    const onLoadedMetadata = () => {
-      if (progressRestored) return;
+    const onLoadedMetadata = (): void => {
+      if (restoredAwemeIdRef.current === awemeId) return;
+      restoredAwemeIdRef.current = awemeId;
 
       try {
         const key = `aweme_progress_${awemeId}`;
@@ -50,7 +60,13 @@ export function useVideoPlayer({
           return;
         }
 
-        const { time, timestamp } = JSON.parse(saved);
+        const parsed = JSON.parse(saved) as {
+          time?: unknown;
+          timestamp?: unknown;
+        };
+        const time = typeof parsed.time === "number" ? parsed.time : 0;
+        const timestamp =
+          typeof parsed.timestamp === "number" ? parsed.timestamp : 0;
         const now = Date.now();
         const fiveMinutes = 5 * 60 * 1000;
 
@@ -60,7 +76,6 @@ export function useVideoPlayer({
           time < v.duration - 1
         ) {
           v.currentTime = time;
-          console.log(`恢复播放进度: ${Math.round(time)}s`);
         } else if (now - timestamp >= fiveMinutes) {
           localStorage.removeItem(key);
         }
@@ -73,19 +88,20 @@ export function useVideoPlayer({
 
     if (v.readyState >= 1) {
       onLoadedMetadata();
-    } else {
-      v.addEventListener("loadedmetadata", onLoadedMetadata, { once: true });
-      return () => v.removeEventListener("loadedmetadata", onLoadedMetadata);
+      return;
     }
+
+    v.addEventListener("loadedmetadata", onLoadedMetadata, { once: true });
+    return () => v.removeEventListener("loadedmetadata", onLoadedMetadata);
   }, [awemeId, enabled, progressRestored, videoRef, setProgressRestored]);
 
-  // 保存播放进度
+  // 保存播放进度并在卸载/切页时主动释放媒体解码缓冲区
   useEffect(() => {
     if (!enabled) return;
     const v = videoRef.current;
     if (!v) return;
 
-    const saveProgress = () => {
+    const saveProgress = (): void => {
       if (!v.duration || Number.isNaN(v.duration) || v.currentTime < 1) return;
 
       try {
@@ -100,14 +116,15 @@ export function useVideoPlayer({
       }
     };
 
-    const interval = setInterval(saveProgress, 2000);
-    const onBeforeUnload = () => saveProgress();
+    const interval = window.setInterval(saveProgress, 2000);
+    const onBeforeUnload = (): void => saveProgress();
     window.addEventListener("beforeunload", onBeforeUnload);
 
     return () => {
-      clearInterval(interval);
+      window.clearInterval(interval);
       window.removeEventListener("beforeunload", onBeforeUnload);
       saveProgress();
+      releaseMediaElement(v);
     };
   }, [awemeId, enabled, videoRef]);
 
@@ -117,13 +134,17 @@ export function useVideoPlayer({
     const v = videoRef.current;
     if (!v) return;
 
-    const onTime = () => {
+    const onTime = (): void => {
       if (!v.duration || Number.isNaN(v.duration)) return;
-      setProgress(v.currentTime / v.duration);
+      const nextProgress = Math.max(0, Math.min(1, v.currentTime / v.duration));
+      if (Math.abs(nextProgress - lastProgressRef.current) >= 0.001) {
+        lastProgressRef.current = nextProgress;
+        setProgress(nextProgress);
+      }
     };
-    const onPlay = () => setIsPlaying(true);
-    const onPause = () => setIsPlaying(false);
-    const onEnded = () => {
+    const onPlay = (): void => setIsPlaying(true);
+    const onPause = (): void => setIsPlaying(false);
+    const onEnded = (): void => {
       if (loopMode === "sequential" && neighbors?.next) {
         router.push(`/aweme/${neighbors.next.aweme_id}`);
       }
@@ -158,23 +179,26 @@ export function useVideoPlayer({
     const v = videoRef.current;
     if (!v) return;
 
-    const checkAutoplay = async () => {
+    const checkAutoplay = async (): Promise<void> => {
       try {
         await v.play();
         setIsPlaying(true);
       } catch {
-        console.log("自动播放被阻止，需要用户交互");
         setIsPlaying(false);
       }
     };
 
     if (v.readyState >= 1) {
-      checkAutoplay();
-    } else {
-      v.addEventListener("loadedmetadata", checkAutoplay, { once: true });
-      return () => v.removeEventListener("loadedmetadata", checkAutoplay);
+      void checkAutoplay();
+      return;
     }
-  }, [enabled, videoRef, setIsPlaying]);
+
+    const onLoaded = (): void => {
+      void checkAutoplay();
+    };
+    v.addEventListener("loadedmetadata", onLoaded, { once: true });
+    return () => v.removeEventListener("loadedmetadata", onLoaded);
+  }, [awemeId, enabled, videoRef, setIsPlaying]);
 
   // 更新音量和倍速
   useEffect(() => {
diff --git a/app/aweme/[awemeId]/utils.ts b/app/aweme/[awemeId]/utils.ts
index 23c0b83..312eeda 100644
--- a/app/aweme/[awemeId]/utils.ts
+++ b/app/aweme/[awemeId]/utils.ts
@@ -91,3 +91,59 @@ export function formatAbsoluteUTC(date: string | Date): string {
   const s = String(d.getUTCSeconds()).padStart(2, "0");
   return `${Y}-${M}-${D} ${h}:${m}:${s} UTC`;
 }
+
+// 主动释放 HTMLMediaElement 解码缓冲与网络流，防止 SPA 连续切页导致内存/硬件解码器泄漏
+export function releaseMediaElement(
+  el: HTMLMediaElement | null | undefined,
+): void {
+  if (!el) return;
+  try {
+    el.pause();
+    el.removeAttribute("src");
+    el.load();
+  } catch {}
+}
+
+const PROGRESS_STORAGE_PREFIX = "aweme_progress_";
+const PROGRESS_TTL_MS = 5 * 60 * 1000;
+const MAX_PROGRESS_ENTRIES = 30;
+
+// 清理过期或超量的视频播放进度缓存，避免长期浏览堆积 localStorage
+export function cleanupExpiredProgressStorage(): void {
+  if (typeof window === "undefined") return;
+  try {
+    const now = Date.now();
+    const validEntries: { key: string; timestamp: number }[] = [];
+
+    for (let i = localStorage.length - 1; i >= 0; i--) {
+      const key = localStorage.key(i);
+      if (!key || !key.startsWith(PROGRESS_STORAGE_PREFIX)) continue;
+
+      const raw = localStorage.getItem(key);
+      if (!raw) {
+        localStorage.removeItem(key);
+        continue;
+      }
+
+      try {
+        const parsed = JSON.parse(raw) as { timestamp?: unknown };
+        const timestamp =
+          typeof parsed.timestamp === "number" ? parsed.timestamp : 0;
+        if (now - timestamp >= PROGRESS_TTL_MS) {
+          localStorage.removeItem(key);
+        } else {
+          validEntries.push({ key, timestamp });
+        }
+      } catch {
+        localStorage.removeItem(key);
+      }
+    }
+
+    if (validEntries.length > MAX_PROGRESS_ENTRIES) {
+      validEntries.sort((a, b) => b.timestamp - a.timestamp);
+      for (let i = MAX_PROGRESS_ENTRIES; i < validEntries.length; i++) {
+        localStorage.removeItem(validEntries[i].key);
+      }
+    }
+  } catch {}
+}
diff --git a/app/globals.css b/app/globals.css
index f51cba7..944388f 100644
--- a/app/globals.css
+++ b/app/globals.css
@@ -56,3 +56,27 @@ mark {
 .min-h-screen {
   min-height: 100dvh;
 }
+
+/* 评论面板自定义滚动条样式 */
+.comment-scroll::-webkit-scrollbar {
+  width: 6px;
+}
+
+.comment-scroll::-webkit-scrollbar-track {
+  background: transparent;
+}
+
+.comment-scroll::-webkit-scrollbar-thumb {
+  background: rgba(255, 255, 255, 0.2);
+  border-radius: 3px;
+  transition: background 0.2s;
+}
+
+.comment-scroll::-webkit-scrollbar-thumb:hover {
+  background: rgba(255, 255, 255, 0.3);
+}
+
+.comment-scroll {
+  scrollbar-width: thin;
+  scrollbar-color: rgba(255, 255, 255, 0.2) transparent;
+}