diff --git a/.memory/worklog.json b/.memory/worklog.json
index ab4c670..aa21d92 100644
--- a/.memory/worklog.json
+++ b/.memory/worklog.json
@@ -2202,6 +2202,19 @@
       "message": "auto-save 2026-05-13 19:23 (~4)",
       "hash": "1f9c094",
       "files_changed": 4
+    },
+    {
+      "ts": "2026-05-13T19:28:47+08:00",
+      "type": "commit",
+      "message": "auto-save 2026-05-13 19:28 (~4)",
+      "hash": "4da7fa8",
+      "files_changed": 4
+    },
+    {
+      "ts": "2026-05-13T11:29:29Z",
+      "type": "session-heartbeat",
+      "message": "Codex 会话活跃 · 最近命令：codex · 1 项未提交变更 · 最近提交：auto-save 2026-05-13 19:28 (~4)",
+      "files_changed": 1
     }
   ]
 }
diff --git a/docs/source-analysis.html b/docs/source-analysis.html
index dbf5e69..2502d62 100644
--- a/docs/source-analysis.html
+++ b/docs/source-analysis.html
@@ -830,6 +830,17 @@ api/main.py
         <h2>变更记录</h2>
         <p>这个记录不是 git log 的替代品。它记录“产品理解发生了什么变化、影响了哪些源码、你以后描述需求时该怎么说”。后续每次改功能都要补一条。</p>
         <div class="changelog">
+          <article class="change">
+            <header>
+              <h3>2026-05-13 · 关键帧详情支持右下角拖拽缩放和上层钉住</h3>
+              <span class="tag orange">KeyframePanelNode</span>
+            </header>
+            <div class="body">
+              <p><strong>问题：</strong>只有按钮缩放不够直观；钉住后仍作为画布节点，会继续随 ReactFlow 画布缩放。</p>
+              <p><strong>改动：</strong>增加右下角拖拽缩放手柄；钉住时通过 portal 固定到浏览器上层，脱离 ReactFlow 画布缩放和平移。</p>
+              <p><strong>影响：</strong><code>web/components/nodes/index.tsx</code>、<code>web/app/page.tsx</code>；未钉住时仍是画布节点，钉住后保持屏幕固定位置。</p>
+            </div>
+          </article>
           <article class="change">
             <header>
               <h3>2026-05-13 · 关键帧详情面板增加钉住按钮</h3>
diff --git a/web/app/page.tsx b/web/app/page.tsx
index 12dabd0..ac7b62a 100644
--- a/web/app/page.tsx
+++ b/web/app/page.tsx
@@ -174,7 +174,7 @@ export default function Home() {
   }, [])
 
   const handleFramePanelScaleChange = useCallback((scale: number) => {
-    setFramePanelScale(Math.max(0.75, Math.min(1.35, Number(scale.toFixed(2)))))
+    setFramePanelScale(Math.max(0.65, Math.min(1.6, Number(scale.toFixed(2)))))
   }, [])
 
   const handleDeleteFrame = useCallback(async (idx: number) => {
diff --git a/web/components/nodes/index.tsx b/web/components/nodes/index.tsx
index 29c267d..5b223cf 100644
--- a/web/components/nodes/index.tsx
+++ b/web/components/nodes/index.tsx
@@ -1,9 +1,10 @@
 "use client"
 import { useEffect, useRef, useState } from "react"
-import { type NodeProps } from "@xyflow/react"
+import { createPortal } from "react-dom"
+import { type NodeProps, useReactFlow } from "@xyflow/react"
 import {
   Link2, Upload, Download, Scissors, Image as ImageIcon,
-  Mic, Languages, FileEdit, Film, FileVideo, Loader2, Plus, X, LayoutGrid, Pin,
+  Mic, Languages, FileEdit, Film, FileVideo, Loader2, Plus, X, LayoutGrid, Pin, Maximize2,
 } from "lucide-react"
 import { NodeShell, type NodeStatus, type NodeKind } from "./node-shell"
 import { type Job, type ImageRef, effectiveFrameUrl, videoUrl, hasCutout, representativeCutoutUrl } from "@/lib/api"
@@ -513,6 +514,9 @@ export function KeyframeNode({ data, selected }: any) {
    ============================================================ */
 export function KeyframePanelNode({ data }: any) {
   const d: NodeData = data
+  const { getZoom } = useReactFlow()
+  const panelRef = useRef<HTMLDivElement>(null)
+  const [pinRect, setPinRect] = useState<{ left: number; top: number }>({ left: 24, top: 72 })
   if (!d.job || d.expandedFrame === null) return null
   const active = d.job.frames.find((f) => f.index === d.expandedFrame)
   const scale = d.framePanelScale ?? 1
@@ -521,12 +525,48 @@ export function KeyframePanelNode({ data }: any) {
   const panelHeight = Math.round(746 * scale)
   const bodyHeight = Math.max(520, panelHeight - 27)
   const setScale = (next: number) => {
-    const clamped = Math.max(0.75, Math.min(1.35, Number(next.toFixed(2))))
+    const clamped = Math.max(0.65, Math.min(1.6, Number(next.toFixed(2))))
     d.onFramePanelScaleChange?.(clamped)
   }
-  return (
+
+  const togglePinned = () => {
+    if (!pinned) {
+      const rect = panelRef.current?.getBoundingClientRect()
+      if (rect) {
+        setPinRect({
+          left: Math.max(12, Math.min(window.innerWidth - Math.min(rect.width, window.innerWidth - 24), rect.left)),
+          top: Math.max(12, Math.min(window.innerHeight - 80, rect.top)),
+        })
+      }
+    }
+    d.onFramePanelPinnedChange?.(!pinned)
+  }
+
+  const startResize = (e: React.PointerEvent) => {
+    e.preventDefault()
+    e.stopPropagation()
+    const startX = e.clientX
+    const startY = e.clientY
+    const startScale = scale
+    const zoom = pinned ? 1 : getZoom()
+    const onMove = (ev: PointerEvent) => {
+      const dx = (ev.clientX - startX) / zoom
+      const dy = (ev.clientY - startY) / zoom
+      const delta = Math.abs(dx) > Math.abs(dy) ? dx / 760 : dy / 746
+      setScale(startScale + delta)
+    }
+    const onUp = () => {
+      window.removeEventListener("pointermove", onMove)
+      window.removeEventListener("pointerup", onUp)
+    }
+    window.addEventListener("pointermove", onMove)
+    window.addEventListener("pointerup", onUp)
+  }
+
+  const panel = (
     <div
-      className="rounded-2xl border border-white/15 bg-black/70 shadow-2xl overflow-hidden"
+      ref={panelRef}
+      className="relative rounded-2xl border border-white/15 bg-black/70 shadow-2xl overflow-hidden"
       style={{ width: panelWidth, height: panelHeight, boxShadow: "0 30px 80px -20px rgba(0,0,0,0.75), 0 0 0 1px rgba(255,255,255,0.05)" }}
     >
       <div className={`keyframe-panel-drag flex h-7 items-center justify-between bg-gradient-to-r from-orange-500 to-red-500 px-3 text-white ${pinned ? "cursor-default" : "cursor-move"}`}>
@@ -543,7 +583,7 @@ export function KeyframePanelNode({ data }: any) {
           </span>
           <button
             type="button"
-            onClick={(e) => { e.stopPropagation(); d.onFramePanelPinnedChange?.(!pinned) }}
+            onClick={(e) => { e.stopPropagation(); togglePinned() }}
             className={`nodrag h-5 w-5 rounded inline-flex items-center justify-center transition ${
               pinned
                 ? "bg-white text-orange-600 shadow"
@@ -601,8 +641,30 @@ export function KeyframePanelNode({ data }: any) {
           onCopyImage={d.onCopyImage}
         />
       </div>
+      <button
+        type="button"
+        onPointerDown={startResize}
+        className="nodrag absolute bottom-0 right-0 z-[5] h-7 w-7 cursor-nwse-resize rounded-tl-md bg-white/10 text-white/65 hover:bg-orange-400/35 hover:text-white inline-flex items-center justify-center"
+        title="拖动右下角缩放面板"
+      >
+        <Maximize2 className="h-3.5 w-3.5" />
+      </button>
     </div>
   )
+
+  if (pinned && typeof document !== "undefined") {
+    return createPortal(
+      <div
+        className="fixed z-[240]"
+        style={{ left: pinRect.left, top: pinRect.top }}
+      >
+        {panel}
+      </div>,
+      document.body,
+    )
+  }
+
+  return panel
 }
 
 /* ============================================================