diff --git a/src/features/ecommerce/EcommerceVideoWorkspace.tsx b/src/features/ecommerce/EcommerceVideoWorkspace.tsx
index 79c8a92..897a37c 100644
--- a/src/features/ecommerce/EcommerceVideoWorkspace.tsx
+++ b/src/features/ecommerce/EcommerceVideoWorkspace.tsx
@@ -1,5 +1,6 @@
-import { useCallback, useEffect, useMemo, useRef, useState } from "react";
+import { Fragment, useCallback, useEffect, useMemo, useRef, useState } from "react";
 import {
+  CloseOutlined,
   CopyOutlined,
   DownloadOutlined,
   FolderAddOutlined,
@@ -111,6 +112,7 @@ export default function EcommerceVideoWorkspace({
   const [failedStep, setFailedStep] = useState<PlanStep | null>(null);
   const [error, setError] = useState<string | null>(null);
   const [actionNotice, setActionNotice] = useState<string | null>(null);
+  const [previewMedia, setPreviewMedia] = useState<{ url: string; type: "image" | "video" } | null>(null);
   const abortControllerRef = useRef<AbortController | null>(null);
   const renderAbortRef = useRef({ current: false });
   const setView = useAppStore((s) => s.setView);
@@ -145,24 +147,17 @@ export default function EcommerceVideoWorkspace({
     saveEcommerceVideoState({ inputFingerprint, stage, completedSteps, planResult, planProgress, scenes, sourceImageUrls });
   }, [inputFingerprint, stage, completedSteps, planResult, planProgress, scenes, sourceImageUrls]);
 
-  // ── Auto-advance: skip manual "next step" clicks ─────────
-  const autoAdvanceTriggeredRef = useRef(false);
+  // ── Auto-advance: automatically run the full pipeline ─────────
   useEffect(() => {
-    if (autoAdvanceTriggeredRef.current) return;
     const delay = 600;
     if (stage === "planned" && planResult && scenes.length > 0) {
-      autoAdvanceTriggeredRef.current = true;
       const timer = setTimeout(() => { void handleGenerateImages(); }, delay);
       return () => clearTimeout(timer);
     }
     if (stage === "imaged" && scenes.every((s) => s.imageUrl)) {
-      autoAdvanceTriggeredRef.current = true;
       const timer = setTimeout(() => { void handleRenderVideos(); }, delay);
       return () => clearTimeout(timer);
     }
-    if (stage === "idle" || stage === "cancelled") {
-      autoAdvanceTriggeredRef.current = false;
-    }
   }, [stage, scenes, planResult]);
 
   // ── Keep-alive: resume polling for running tasks ──────────
@@ -638,11 +633,7 @@ export default function EcommerceVideoWorkspace({
                 {scenes.length > 0 ? scenes.map((s) => (
                   <div key={`trunk-${s.sceneId}`} className="ecom-video-tree__branch-tap" />
                 )) : (
-                  <>
-                    <div className="ecom-video-tree__branch-tap" />
-                    <div className="ecom-video-tree__branch-tap" />
-                    <div className="ecom-video-tree__branch-tap" />
-                  </>
+                  <div className="ecom-video-tree__branch-tap" />
                 )}
               </div>
             </div>
@@ -672,7 +663,7 @@ export default function EcommerceVideoWorkspace({
                       <svg viewBox="0 0 40 20" fill="none"><path d="M0 10 H28 M22 4 L30 10 L22 16" stroke="currentColor" strokeWidth="2" strokeLinecap="round" strokeLinejoin="round"/></svg>
                     </div>
       
-                    <article className={`ecom-video-tree-node ecom-video-tree-node--image${imgReady ? " is-completed" : imgRunning ? " is-active" : ""}`}>
+                    <article className={`ecom-video-tree-node ecom-video-tree-node--image${imgReady ? " is-completed" : imgRunning ? " is-active" : ""}`} onClick={imgReady ? () => setPreviewMedia({ url: scene.imageUrl!, type: "image" }) : undefined} style={imgReady ? { cursor: "pointer" } : undefined}>
                       {imgReady ? (
                         <img src={scene.imageUrl!} alt={`分镜${scene.sceneId}`} />
                       ) : (
@@ -688,7 +679,7 @@ export default function EcommerceVideoWorkspace({
                       <svg viewBox="0 0 40 20" fill="none"><path d="M0 10 H28 M22 4 L30 10 L22 16" stroke="currentColor" strokeWidth="2" strokeLinecap="round" strokeLinejoin="round"/></svg>
                     </div>
       
-                    <article className={`ecom-video-tree-node ecom-video-tree-node--video${vidReady ? " is-completed" : vidRunning ? " is-active" : vidFailed ? " is-failed" : ""}`}>
+                    <article className={`ecom-video-tree-node ecom-video-tree-node--video${vidReady ? " is-completed" : vidRunning ? " is-active" : vidFailed ? " is-failed" : ""}`} onClick={vidReady ? () => setPreviewMedia({ url: scene.resultUrl!, type: "video" }) : undefined} style={vidReady ? { cursor: "pointer" } : undefined}>
                       {vidReady ? (
                         <video src={scene.resultUrl!} muted playsInline loop autoPlay />
                       ) : (
@@ -709,34 +700,32 @@ export default function EcommerceVideoWorkspace({
                   </div>
                 );
               }) : (
-                [1, 2, 3].map((n) => (
-                  <div key={n} className={`ecom-video-tree__row ecom-video-tree__row--empty${stage === "planning" ? " is-planning" : ""}`} style={{ animationDelay: `${n * 120}ms` }}>
-                    <article className="ecom-video-tree-node ecom-video-tree-node--text">
-                      <div className="ecom-video-tree-node__inner">
-                        <span className="ecom-video-tree-node__title">分镜文本{n}</span>
-                        <span className="ecom-video-tree-node__desc">{stage === "planning" ? "策划中..." : "等待策划"}</span>
-                      </div>
-                    </article>
-                    <div className="ecom-video-tree__arrow" aria-hidden="true">
-                      <svg viewBox="0 0 40 20" fill="none"><path d="M0 10 H28 M22 4 L30 10 L22 16" stroke="currentColor" strokeWidth="2" strokeLinecap="round" strokeLinejoin="round"/></svg>
+                <div className={`ecom-video-tree__row ecom-video-tree__row--empty${stage === "planning" ? " is-planning" : ""}`}>
+                  <article className="ecom-video-tree-node ecom-video-tree-node--text">
+                    <div className="ecom-video-tree-node__inner">
+                      <span className="ecom-video-tree-node__title">分镜策划</span>
+                      <span className="ecom-video-tree-node__desc">{stage === "planning" ? "策划中..." : "点击一键策划开始"}</span>
                     </div>
-                    <article className="ecom-video-tree-node ecom-video-tree-node--image">
-                      <div className="ecom-video-tree-node__placeholder">
-                        {stage === "planning" ? <LoadingOutlined /> : <span>待生成</span>}
-                      </div>
-                      <span className="ecom-video-tree-node__tag">分镜图{n}</span>
-                    </article>
-                    <div className="ecom-video-tree__arrow" aria-hidden="true">
-                      <svg viewBox="0 0 40 20" fill="none"><path d="M0 10 H28 M22 4 L30 10 L22 16" stroke="currentColor" strokeWidth="2" strokeLinecap="round" strokeLinejoin="round"/></svg>
-                    </div>
-                    <article className="ecom-video-tree-node ecom-video-tree-node--video">
-                      <div className="ecom-video-tree-node__placeholder">
-                        {stage === "planning" ? <LoadingOutlined /> : <span>待生成</span>}
-                      </div>
-                      <span className="ecom-video-tree-node__tag">分镜视频{n}</span>
-                    </article>
+                  </article>
+                  <div className="ecom-video-tree__arrow" aria-hidden="true">
+                    <svg viewBox="0 0 40 20" fill="none"><path d="M0 10 H28 M22 4 L30 10 L22 16" stroke="currentColor" strokeWidth="2" strokeLinecap="round" strokeLinejoin="round"/></svg>
                   </div>
-                ))
+                  <article className="ecom-video-tree-node ecom-video-tree-node--image">
+                    <div className="ecom-video-tree-node__placeholder">
+                      {stage === "planning" ? <LoadingOutlined /> : <span>待生成</span>}
+                    </div>
+                    <span className="ecom-video-tree-node__tag">分镜图</span>
+                  </article>
+                  <div className="ecom-video-tree__arrow" aria-hidden="true">
+                    <svg viewBox="0 0 40 20" fill="none"><path d="M0 10 H28 M22 4 L30 10 L22 16" stroke="currentColor" strokeWidth="2" strokeLinecap="round" strokeLinejoin="round"/></svg>
+                  </div>
+                  <article className="ecom-video-tree-node ecom-video-tree-node--video">
+                    <div className="ecom-video-tree-node__placeholder">
+                      {stage === "planning" ? <LoadingOutlined /> : <span>待生成</span>}
+                    </div>
+                    <span className="ecom-video-tree-node__tag">分镜视频</span>
+                  </article>
+                </div>
               )}
             </div>
           </div>
@@ -753,6 +742,19 @@ export default function EcommerceVideoWorkspace({
         ) : null}
         {actionNotice ? <div className="ecom-video-flow-notice">{actionNotice}</div> : null}
       </section>
+
+      {previewMedia ? (
+        <div className="ecom-video-preview-overlay" onClick={() => setPreviewMedia(null)}>
+          <button type="button" className="ecom-video-preview-overlay__close" onClick={() => setPreviewMedia(null)}>
+            <CloseOutlined />
+          </button>
+          {previewMedia.type === "image" ? (
+            <img src={previewMedia.url} alt="预览" onClick={(e) => e.stopPropagation()} />
+          ) : (
+            <video src={previewMedia.url} controls autoPlay onClick={(e) => e.stopPropagation()} />
+          )}
+        </div>
+      ) : null}
     </div>
   );
 }
diff --git a/src/styles/pages/ecommerce-video.css b/src/styles/pages/ecommerce-video.css
index 2230115..7355f58 100644
--- a/src/styles/pages/ecommerce-video.css
+++ b/src/styles/pages/ecommerce-video.css
@@ -1101,3 +1101,47 @@
   70% { opacity: 0.5; }
   100% { opacity: 0; transform: translateX(100%); }
 }
+
+/* ── Preview lightbox overlay ────────────────────── */
+.ecom-video-preview-overlay {
+  position: fixed;
+  inset: 0;
+  z-index: 9999;
+  display: grid;
+  place-items: center;
+  background: rgba(0, 0, 0, 0.85);
+  backdrop-filter: blur(8px);
+  cursor: zoom-out;
+  animation: ecom-preview-fade-in 200ms ease;
+}
+
+.ecom-video-preview-overlay__close {
+  position: absolute;
+  top: 24px;
+  right: 24px;
+  z-index: 10;
+  display: grid;
+  width: 40px;
+  height: 40px;
+  place-items: center;
+  border: 1px solid rgba(255, 255, 255, 0.2);
+  border-radius: 999px;
+  background: rgba(0, 0, 0, 0.6);
+  color: #fff;
+  font-size: 18px;
+  cursor: pointer;
+}
+
+.ecom-video-preview-overlay img,
+.ecom-video-preview-overlay video {
+  max-width: 90vw;
+  max-height: 85vh;
+  border-radius: 8px;
+  object-fit: contain;
+  cursor: default;
+}
+
+@keyframes ecom-preview-fade-in {
+  from { opacity: 0; }
+  to { opacity: 1; }
+}