diff --git a/components/pages/work-flow/media-viewer.tsx b/components/pages/work-flow/media-viewer.tsx
index 7a143ed..b6c30e1 100644
--- a/components/pages/work-flow/media-viewer.tsx
+++ b/components/pages/work-flow/media-viewer.tsx
@@ -2,7 +2,7 @@
 
 import React, { useRef, useEffect, useState, SetStateAction, useMemo } from 'react';
 import { motion, AnimatePresence } from 'framer-motion';
-import { Edit3, Play, Pause, Volume2, VolumeX, Maximize, Minimize, Loader2, X, Scissors, RotateCcw, MessageCircleMore, Download, ArrowDownWideNarrow, CircleAlert, PenTool } from 'lucide-react';
+import { Edit3, Play, Pause, Volume2, VolumeX, Maximize, Minimize, Loader2, X, Scissors, RotateCcw, MessageCircleMore, Download, ArrowDownWideNarrow, PictureInPicture2, PenTool } from 'lucide-react';
 import { ProgressiveReveal, presets } from '@/components/ui/progressive-reveal';
 import { GlassIconButton } from '@/components/ui/glass-icon-button';
 import { ScriptRenderer } from '@/components/script-renderer/ScriptRenderer';
@@ -69,6 +69,8 @@ export const MediaViewer = React.memo(function MediaViewer({
   // 音量控制状态
   const [isMuted, setIsMuted] = useState(false);
   const [volume, setVolume] = useState(0.8);
+  const [duration, setDuration] = useState(0);
+  const [currentTime, setCurrentTime] = useState(0);
 
   // 最终视频控制状态
   const [isFinalVideoPlaying, setIsFinalVideoPlaying] = useState(true);
@@ -175,6 +177,9 @@ export const MediaViewer = React.memo(function MediaViewer({
     if (finalVideoRef.current) {
       setFinalVideoReady(true);
       applyVolumeSettings(finalVideoRef.current);
+      try {
+        setDuration(Number.isFinite(finalVideoRef.current.duration) ? finalVideoRef.current.duration : 0);
+      } catch {}
 
       // 如果当前状态是应该播放的，尝试播放
       if (isFinalVideoPlaying) {
@@ -235,16 +240,15 @@ export const MediaViewer = React.memo(function MediaViewer({
   // 全屏控制
   const toggleFullscreen = () => {
     setUserHasInteracted(true);
+    const target = activeVideoRef().current;
     if (!document.fullscreenElement) {
-      // 进入全屏
-      if (finalVideoRef.current) {
-        finalVideoRef.current.requestFullscreen?.() ||
-        (finalVideoRef.current as any).webkitRequestFullscreen?.() ||
-        (finalVideoRef.current as any).msRequestFullscreen?.();
+      if (target) {
+        target.requestFullscreen?.() ||
+        (target as any).webkitRequestFullscreen?.() ||
+        (target as any).msRequestFullscreen?.();
         setIsFullscreen(true);
       }
     } else {
-      // 退出全屏
       document.exitFullscreen?.() ||
       (document as any).webkitExitFullscreen?.() ||
       (document as any).msExitFullscreen?.();
@@ -263,6 +267,9 @@ export const MediaViewer = React.memo(function MediaViewer({
       } else {
         mainVideoRef.current.pause();
       }
+      try {
+        setDuration(Number.isFinite(mainVideoRef.current.duration) ? mainVideoRef.current.duration : 0);
+      } catch {}
     }
   }, [isVideoPlaying]);
 
@@ -289,6 +296,61 @@ export const MediaViewer = React.memo(function MediaViewer({
     }
   }, [volume, isMuted]);
 
+  // 绑定时间更新（同时监听两个 video）
+  useEffect(() => {
+    const mv = mainVideoRef.current;
+    const fv = finalVideoRef.current;
+    const onTimeUpdate = (e: Event) => {
+      const el = e.currentTarget as HTMLVideoElement;
+      setCurrentTime(el.currentTime || 0);
+      if (Number.isFinite(el.duration)) setDuration(el.duration);
+    };
+    mv?.addEventListener('timeupdate', onTimeUpdate);
+    fv?.addEventListener('timeupdate', onTimeUpdate);
+    mv?.addEventListener('loadedmetadata', onTimeUpdate);
+    fv?.addEventListener('loadedmetadata', onTimeUpdate);
+    return () => {
+      mv?.removeEventListener('timeupdate', onTimeUpdate);
+      fv?.removeEventListener('timeupdate', onTimeUpdate);
+      mv?.removeEventListener('loadedmetadata', onTimeUpdate);
+      fv?.removeEventListener('loadedmetadata', onTimeUpdate);
+    };
+  }, []);
+
+  const activeVideoRef = () => {
+    // 根据当前阶段选择活跃的 video 引用
+    const effectiveStage = (selectedView === 'final' && taskObject.final?.url)
+      ? 'final_video'
+      : (!['script', 'character', 'scene'].includes(taskObject.currentStage) ? 'video' : taskObject.currentStage);
+    return effectiveStage === 'final_video' ? finalVideoRef : mainVideoRef;
+  };
+
+  const progressPercent = duration > 0 ? Math.min(100, Math.max(0, (currentTime / duration) * 100)) : 0;
+
+  const formatRemaining = (dur: number, cur: number) => {
+    const remain = Math.max(0, Math.round(dur - cur));
+    const m = Math.floor(remain / 60);
+    const s = remain % 60;
+    return `-${m}:${s.toString().padStart(2, '0')}`;
+  };
+
+  const seekTo = (pct: number) => {
+    const ref = activeVideoRef().current;
+    if (!ref || !Number.isFinite(ref.duration)) return;
+    const t = (pct / 100) * ref.duration;
+    ref.currentTime = t;
+    setCurrentTime(t);
+  };
+
+  const requestPip = async () => {
+    try {
+      const ref = activeVideoRef().current as any;
+      if (ref && typeof ref.requestPictureInPicture === 'function') {
+        await ref.requestPictureInPicture();
+      }
+    } catch {}
+  };
+
   // 监听全屏状态变化
   useEffect(() => {
     const handleFullscreenChange = () => {
@@ -317,41 +379,54 @@ export const MediaViewer = React.memo(function MediaViewer({
     };
   }, []);
 
-  // 渲染音量控制组件
-  const renderVolumeControls = () => (
-    <div className="flex items-center gap-2">
-      {/* 静音按钮 */}
-      <GlassIconButton
-        icon={isMuted ? VolumeX : Volume2}
-        onClick={toggleMute}
-        size="sm"
-      />
+  // 渲染底部通栏控制条（与图2一致）
+  const renderBottomControls = (
+    isFinal: boolean,
+    onPlayToggle: () => void,
+    playing: boolean
+  ) => (
+    <div
+      className="absolute left-0 right-0 bottom-2 z-[21] px-6"
+      data-alt={isFinal ? 'final-controls' : 'video-controls'}
+    >
+      <div className="flex items-center gap-3">
+        {/* 播放/暂停 */}
+        <GlassIconButton icon={playing ? Pause : Play} onClick={onPlayToggle} size="sm" />
 
-      {/* 音量滑块 - 一直显示 */}
-      <div className="flex items-center gap-2">
-        <div className="relative">
+        {/* 静音，仅图标 */}
+        <GlassIconButton icon={isMuted ? VolumeX : Volume2} onClick={toggleMute} size="sm" />
+
+        {/* 进度条 */}
+        <div className="flex-1 flex items-center">
           <input
             type="range"
             min="0"
-            max="1"
+            max="100"
             step="0.1"
-            value={volume}
-            onChange={(e) => handleVolumeChange(parseFloat(e.target.value))}
-            className="w-16 h-1 bg-white/20 rounded-lg appearance-none cursor-pointer
+            value={progressPercent}
+            onChange={(e) => seekTo(parseFloat(e.target.value))}
+            className="w-full h-1 bg-white/20 rounded-lg appearance-none cursor-pointer
               [&::-webkit-slider-thumb]:appearance-none [&::-webkit-slider-thumb]:w-3 [&::-webkit-slider-thumb]:h-3
               [&::-webkit-slider-thumb]:rounded-full [&::-webkit-slider-thumb]:bg-white
-              [&::-webkit-slider-thumb]:cursor-pointer [&::-webkit-slider-thumb]:shadow-lg
-              [&::-moz-range-thumb]:w-3 [&::-moz-range-thumb]:h-3 [&::-moz-range-thumb]:rounded-full
-              [&::-moz-range-thumb]:bg-white [&::-moz-range-thumb]:cursor-pointer
-              [&::-moz-range-thumb]:border-none [&::-moz-range-thumb]:shadow-lg"
+              [&::-webkit-slider-thumb]:cursor-pointer
+              [&::-moz-range-thumb]:w-3 [&::-moz-range-thumb]:h-3 [&::-moz-range-thumb]:rounded-full 
+              [&::-moz-range-thumb]:bg-white [&::-moz-range-thumb]:cursor-pointer [&::-moz-range-thumb]:border-none"
             style={{
-              background: `linear-gradient(to right, white 0%, white ${volume * 100}%, rgba(255,255,255,0.2) ${volume * 100}%, rgba(255,255,255,0.2) 100%)`
+              background: `linear-gradient(to right, white 0%, white ${progressPercent}%, rgba(255,255,255,0.2) ${progressPercent}%, rgba(255,255,255,0.2) 100%)`
             }}
           />
         </div>
-        <span className="text-xs text-white/70 w-8 text-center">
-          {Math.round(volume * 100)}%
-        </span>
+
+        {/* 剩余时间 */}
+        <div className="text-white/80 text-sm w-14 text-right select-none" data-alt="time-remaining">
+          {formatRemaining(duration, currentTime)}
+        </div>
+
+        {/* 画中画 */}
+        <GlassIconButton icon={PictureInPicture2} onClick={requestPip} size="sm" />
+
+        {/* 全屏 */}
+        <GlassIconButton icon={isFullscreen ? Minimize : Maximize} onClick={toggleFullscreen} size="sm" />
       </div>
     </div>
   );
@@ -432,35 +507,9 @@ export const MediaViewer = React.memo(function MediaViewer({
             )}
           </div>
 
-          {/* 底部控制区域 */}
-          <motion.div
-            className="absolute bottom-16 left-4 z-10 flex items-center gap-3"
-            initial={{ opacity: 0, scale: 0.8 }}
-            animate={{ opacity: 1, scale: 1 }}
-            transition={{ delay: 1, duration: 0.6 }}
-          >
-            {/* 播放/暂停按钮 */}
-            <motion.div
-              whileHover={{ scale: 1.1 }}
-              whileTap={{ scale: 0.9 }}
-              className="relative"
-            >
-              <GlassIconButton
-                icon={isFinalVideoPlaying ? Pause : Play}
-                onClick={toggleFinalVideoPlay}
-                size="sm"
-              />
-            </motion.div>
-
-            {/* 音量控制 */}
-            {renderVolumeControls()}
-
-            {/* 全屏按钮 */}
-            <GlassIconButton
-              icon={isFullscreen ? Minimize : Maximize}
-              onClick={toggleFullscreen}
-              size="sm"
-            />
+          {/* 底部通栏控制区域 */}
+          <motion.div initial={{ opacity: 0 }} animate={{ opacity: 1 }} transition={{ delay: 0.6 }}>
+            {renderBottomControls(true, toggleFinalVideoPlay, isFinalVideoPlaying)}
           </motion.div>
         </div>
       </div>
@@ -625,31 +674,11 @@ export const MediaViewer = React.memo(function MediaViewer({
           </motion.div>
         </AnimatePresence> */}
 
-        {/* 底部控制区域 */}
+        {/* 底部通栏控制区域（仅生成成功时显示） */}
         { taskObject.videos.data[currentSketchIndex].video_status === 1 && (
           <AnimatePresence>
-            <motion.div
-              className="absolute bottom-4 left-4 z-[21] flex items-center gap-3"
-              initial={{ opacity: 0, scale: 0.8 }}
-              animate={{ opacity: 1, scale: 1 }}
-              exit={{ opacity: 0, scale: 0.8 }}
-              transition={{ duration: 0.2 }}
-            >
-              {/* 播放按钮 */}
-              <motion.div
-                whileHover={{ scale: 1.1 }}
-                whileTap={{ scale: 0.9 }}
-                className="relative"
-              >
-                <GlassIconButton
-                  icon={isVideoPlaying ? Pause : Play}
-                  onClick={onToggleVideoPlay}
-                  size="sm"
-                />
-              </motion.div>
-
-              {/* 音量控制 */}
-              {renderVolumeControls()}
+            <motion.div initial={{ opacity: 0 }} animate={{ opacity: 1 }} exit={{ opacity: 0 }} transition={{ duration: 0.2 }}>
+              {renderBottomControls(false, onToggleVideoPlay, isVideoPlaying)}
             </motion.div>
           </AnimatePresence>
         )}