diff --git a/.memory/worklog.json b/.memory/worklog.json
index ea14199..08c5be8 100644
--- a/.memory/worklog.json
+++ b/.memory/worklog.json
@@ -1795,6 +1795,19 @@
       "message": "auto-save 2026-05-13 15:28 (~4)",
       "hash": "ad895f9",
       "files_changed": 4
+    },
+    {
+      "ts": "2026-05-13T15:33:53+08:00",
+      "type": "commit",
+      "message": "auto-save 2026-05-13 15:33 (~4)",
+      "hash": "944e7e5",
+      "files_changed": 4
+    },
+    {
+      "ts": "2026-05-13T07:37:40Z",
+      "type": "session-heartbeat",
+      "message": "Claude 会话活跃 · 最近命令：claude · 2 项未提交变更 · 最近提交：auto-save 2026-05-13 15:33 (~4)",
+      "files_changed": 2
     }
   ]
 }
diff --git a/web/components/nodes/index.tsx b/web/components/nodes/index.tsx
index 07d2e75..fcef279 100644
--- a/web/components/nodes/index.tsx
+++ b/web/components/nodes/index.tsx
@@ -347,9 +347,7 @@ export function KeyframeNode({ data, selected }: any) {
   const st = keyframeStatus(d.job)
   const frames = d.job?.frames ?? []
   const jobId = d.job?.id
-  const [hover, setHover] = useState<{ idx: number; rect: DOMRect } | null>(null)
-  const [mounted, setMounted] = useState(false)
-  useEffect(() => setMounted(true), [])
+  const aspectStr = d.job && d.job.height > 0 ? `${d.job.width}/${d.job.height}` : "9/16"
 
   return (
     <div className="relative" style={{ width: KEYFRAME_WIDTH }}>
@@ -377,8 +375,6 @@ export function KeyframeNode({ data, selected }: any) {
               >
               <button
                 onClick={(e) => { e.stopPropagation(); d.onExpandFrame(f.index) }}
-                onMouseEnter={(e) => setHover({ idx: f.index, rect: (e.currentTarget as HTMLElement).getBoundingClientRect() })}
-                onMouseLeave={() => setHover(null)}
                 title={`第 ${f.index + 1} 张 · ${f.timestamp.toFixed(1)}s · hover 看大图 · 点击精细调整`}
                 className="absolute inset-0 w-full h-full"
               >
@@ -441,6 +437,26 @@ export function KeyframeNode({ data, selected }: any) {
                   <X className="h-3 w-3" />
                 </button>
               )}
+              {/* hover 预览 — absolute 浮在缩略图上方，跟着 ReactFlow 画布缩放平移 */}
+              <div
+                className="pointer-events-none absolute opacity-0 group-hover:opacity-100 scale-95 group-hover:scale-100 transition-all duration-150 z-[60]"
+                style={{
+                  bottom: "calc(100% + 10px)",
+                  left: "50%",
+                  transform: "translateX(-50%)",
+                  transformOrigin: "bottom center",
+                }}
+              >
+                <div className="rounded-lg overflow-hidden border-2 border-orange-300/50 bg-black shadow-2xl" style={{ width: 280 }}>
+                  <div style={{ aspectRatio: aspectStr }}>
+                    <img src={effectiveFrameUrl(jobId, f)} alt="" className="w-full h-full object-cover" />
+                  </div>
+                  <div className="px-2 py-1 bg-black/80 text-white text-[10.5px] flex items-center justify-between">
+                    <span>分镜 {f.index + 1}</span>
+                    <span className="text-white/60 font-mono">{f.timestamp.toFixed(2)}s</span>
+                  </div>
+                </div>
+              </div>
               </div>
             )
           })}
@@ -479,43 +495,6 @@ export function KeyframeNode({ data, selected }: any) {
         )}
       </NodeShell>
 
-      {/* Portal hover 预览 — 缩略图正上方展开（DAG 画布上方空旷） */}
-      {mounted && hover && jobId && (() => {
-        const hf = frames.find((x) => x.index === hover.idx)
-        if (!hf) return null
-        const vidAspect = d.job && d.job.height > 0 ? d.job.height / d.job.width : 16 / 9
-        const gap = 12
-        // 高度优先：不超过缩略图上方可用空间，也不超过视口 80vh
-        const maxH = Math.max(160, Math.min(window.innerHeight * 0.8, hover.rect.top - gap - 12))
-        const maxW = Math.min(window.innerWidth * 0.45, 480)
-        let h = maxH, w = h / vidAspect
-        if (w > maxW) { w = maxW; h = w * vidAspect }
-        const centerX = hover.rect.left + hover.rect.width / 2
-        const left = Math.max(12, Math.min(window.innerWidth - w - 12, centerX - w / 2))
-        const top = hover.rect.top - h - gap
-        return createPortal(
-          <div
-            className="fixed z-[120] pointer-events-none"
-            style={{
-              left, top,
-              animation: "drawer-in 0.18s cubic-bezier(0.32, 0.72, 0, 1)",
-            }}
-          >
-            <div className="rounded-2xl overflow-hidden border border-orange-300/40 bg-black" style={{ boxShadow: "0 30px 80px -10px rgba(0,0,0,0.85), 0 0 0 1px rgba(255,255,255,0.06)" }}>
-              <img
-                src={effectiveFrameUrl(jobId, hf)}
-                alt={`preview ${hf.index}`}
-                className="block"
-                style={{ width: w, height: h, objectFit: "contain" }}
-              />
-              <div className="flex items-center justify-between px-3 py-1.5 bg-black/70 backdrop-blur-md">
-                <span className="text-white text-[12px] font-medium">分镜 {hf.index + 1} · {hf.timestamp.toFixed(2)}s</span>
-              </div>
-            </div>
-          </div>,
-          document.body,
-        )
-      })()}
     </div>
   )
 }
@@ -619,9 +598,6 @@ const IMAGEGEN_WIDTH = 360
 export function ImageGenNode({ data, selected }: any) {
   const d: NodeData = data
   const job = d?.job
-  const [hover, setHover] = useState<{ key: string; rect: DOMRect } | null>(null)
-  const [mounted, setMounted] = useState(false)
-  useEffect(() => setMounted(true), [])
 
   // 上方浮条 = 所有 frame 的 elements 已提取图（"分镜头编排"的输入素材）
   type ElPreview = { frameIdx: number; elementId: string; name: string; src: string; cid: string }
@@ -662,8 +638,6 @@ export function ImageGenNode({ data, selected }: any) {
               >
                 <button
                   onClick={(e) => { e.stopPropagation(); d.onOpenStoryboard?.(p.frameIdx) }}
-                  onMouseEnter={(e) => setHover({ key, rect: (e.currentTarget as HTMLElement).getBoundingClientRect() })}
-                  onMouseLeave={() => setHover(null)}
                   title={`${p.name} · 来自分镜 ${p.frameIdx + 1} · hover 看大图`}
                   className="absolute inset-0 w-full h-full"
                 >
@@ -692,6 +666,26 @@ export function ImageGenNode({ data, selected }: any) {
                     ⬆
                   </button>
                 )}
+                {/* hover 预览 — absolute 浮在缩略图上方 */}
+                <div
+                  className="pointer-events-none absolute opacity-0 group-hover:opacity-100 scale-95 group-hover:scale-100 transition-all duration-150 z-[60]"
+                  style={{
+                    bottom: "calc(100% + 10px)",
+                    left: "50%",
+                    transform: "translateX(-50%)",
+                    transformOrigin: "bottom center",
+                  }}
+                >
+                  <div className="rounded-lg overflow-hidden border-2 border-violet-300/50 bg-white shadow-2xl" style={{ width: 280 }}>
+                    <div style={{ aspectRatio: aspect }}>
+                      <img src={p.src} alt="" className="w-full h-full object-contain" />
+                    </div>
+                    <div className="px-2 py-1 bg-black/80 text-white text-[10.5px] flex items-center justify-between">
+                      <span className="truncate">{p.name}</span>
+                      <span className="text-white/60 font-mono shrink-0 ml-2">分镜 {p.frameIdx + 1}</span>
+                    </div>
+                  </div>
+                </div>
               </div>
             )
           })}
@@ -723,45 +717,6 @@ export function ImageGenNode({ data, selected }: any) {
         )}
       </NodeShell>
 
-      {/* Portal hover 预览 — 缩略图正上方展开 */}
-      {mounted && hover && job && (() => {
-        const [fi, ei] = hover.key.split("_")
-        const frameIdx = parseInt(fi, 10)
-        const p = elementCrops.find((x) => x.frameIdx === frameIdx && x.elementId === ei)
-        if (!p) return null
-        const vidAspect = job.height > 0 ? job.height / job.width : 16 / 9
-        const gap = 12
-        const maxH = Math.max(160, Math.min(window.innerHeight * 0.8, hover.rect.top - gap - 12))
-        const maxW = Math.min(window.innerWidth * 0.45, 480)
-        let h = maxH, w = h / vidAspect
-        if (w > maxW) { w = maxW; h = w * vidAspect }
-        const centerX = hover.rect.left + hover.rect.width / 2
-        const left = Math.max(12, Math.min(window.innerWidth - w - 12, centerX - w / 2))
-        const top = hover.rect.top - h - gap
-        return createPortal(
-          <div
-            className="fixed z-[120] pointer-events-none"
-            style={{
-              left, top,
-              animation: "drawer-in 0.18s cubic-bezier(0.32, 0.72, 0, 1)",
-            }}
-          >
-            <div className="rounded-2xl overflow-hidden border border-violet-300/40 bg-white" style={{ boxShadow: "0 30px 80px -10px rgba(0,0,0,0.85), 0 0 0 1px rgba(255,255,255,0.06)" }}>
-              <img
-                src={p.src}
-                alt={`preview ${p.elementId}`}
-                className="block"
-                style={{ width: w, height: h, objectFit: "contain" }}
-              />
-              <div className="flex items-center justify-between px-3 py-1.5 bg-black/70 backdrop-blur-md">
-                <span className="text-white text-[12px] font-medium">{p.name}</span>
-                <span className="text-white/60 text-[11px] font-mono">分镜 {p.frameIdx + 1}</span>
-              </div>
-            </div>
-          </div>,
-          document.body,
-        )
-      })()}
     </div>
   )
 }