diff --git a/cankaoyangshi/.env.example b/cankaoyangshi/.env.example
new file mode 100644
index 00000000..7a550fe7
--- /dev/null
+++ b/cankaoyangshi/.env.example
@@ -0,0 +1,9 @@
+# GEMINI_API_KEY: Required for Gemini AI API calls.
+# AI Studio automatically injects this at runtime from user secrets.
+# Users configure this via the Secrets panel in the AI Studio UI.
+GEMINI_API_KEY="MY_GEMINI_API_KEY"
+
+# APP_URL: The URL where this applet is hosted.
+# AI Studio automatically injects this at runtime with the Cloud Run service URL.
+# Used for self-referential links, OAuth callbacks, and API endpoints.
+APP_URL="MY_APP_URL"
diff --git a/cankaoyangshi/README.md b/cankaoyangshi/README.md
new file mode 100644
index 00000000..34585da4
--- /dev/null
+++ b/cankaoyangshi/README.md
@@ -0,0 +1,20 @@
+<div align="center">
+<img width="1200" height="475" alt="GHBanner" src="https://ai.google.dev/static/site-assets/images/share-ais-513315318.png" />
+</div>
+
+# Run and deploy your AI Studio app
+
+This contains everything you need to run your app locally.
+
+View your app in AI Studio: https://ai.studio/apps/75261c35-a558-4ef8-9501-e8b7f9c98bfb
+
+## Run Locally
+
+**Prerequisites:**  Node.js
+
+
+1. Install dependencies:
+   `npm install`
+2. Set the `GEMINI_API_KEY` in [.env.local](.env.local) to your Gemini API key
+3. Run the app:
+   `npm run dev`
diff --git a/cankaoyangshi/index.html b/cankaoyangshi/index.html
new file mode 100644
index 00000000..21dfe690
--- /dev/null
+++ b/cankaoyangshi/index.html
@@ -0,0 +1,13 @@
+<!doctype html>
+<html lang="en">
+  <head>
+    <meta charset="UTF-8" />
+    <meta name="viewport" content="width=device-width, initial-scale=1.0" />
+    <title>My Google AI Studio App</title>
+  </head>
+  <body>
+    <div id="root"></div>
+    <script type="module" src="/src/main.tsx"></script>
+  </body>
+</html>
+
diff --git a/cankaoyangshi/metadata.json b/cankaoyangshi/metadata.json
new file mode 100644
index 00000000..19d0a11c
--- /dev/null
+++ b/cankaoyangshi/metadata.json
@@ -0,0 +1,6 @@
+{
+  "name": "Gemini Style Assistant",
+  "description": "A clean, modern AI assistant interface inspired by Google Gemini with centered search, suggestion pills, and a minimalist sidebar.",
+  "requestFramePermissions": [],
+  "majorCapabilities": ["MAJOR_CAPABILITY_SERVER_SIDE_GEMINI_API"]
+}
diff --git a/cankaoyangshi/package.json b/cankaoyangshi/package.json
new file mode 100644
index 00000000..9748aee3
--- /dev/null
+++ b/cankaoyangshi/package.json
@@ -0,0 +1,35 @@
+{
+  "name": "react-example",
+  "private": true,
+  "version": "0.0.0",
+  "type": "module",
+  "scripts": {
+    "dev": "vite --port=3000 --host=0.0.0.0",
+    "build": "vite build",
+    "preview": "vite preview",
+    "clean": "rm -rf dist server.js",
+    "lint": "tsc --noEmit"
+  },
+  "dependencies": {
+    "@google/genai": "^1.29.0",
+    "@tailwindcss/vite": "^4.1.14",
+    "@vitejs/plugin-react": "^5.0.4",
+    "lucide-react": "^0.546.0",
+    "react": "^19.0.1",
+    "react-dom": "^19.0.1",
+    "vite": "^6.2.3",
+    "express": "^4.21.2",
+    "dotenv": "^17.2.3",
+    "motion": "^12.23.24"
+  },
+  "devDependencies": {
+    "@types/node": "^22.14.0",
+    "autoprefixer": "^10.4.21",
+    "esbuild": "^0.25.0",
+    "tailwindcss": "^4.1.14",
+    "tsx": "^4.21.0",
+    "typescript": "~5.8.2",
+    "vite": "^6.2.3",
+    "@types/express": "^4.17.21"
+  }
+}
diff --git a/cankaoyangshi/src/App.tsx b/cankaoyangshi/src/App.tsx
new file mode 100644
index 00000000..1cd7026f
--- /dev/null
+++ b/cankaoyangshi/src/App.tsx
@@ -0,0 +1,238 @@
+/**
+ * @license
+ * SPDX-License-Identifier: Apache-2.0
+ */
+
+import { useState } from 'react';
+import { motion, AnimatePresence } from 'motion/react';
+import { 
+  MessageSquare, 
+  Bot, 
+  Wrench, 
+  Brain, 
+  ListChecks, 
+  Settings, 
+  Menu, 
+  Mic, 
+  Plus, 
+  Sparkles,
+  ArrowRight,
+  User,
+  History,
+  LayoutGrid,
+  Languages,
+  Code2,
+  Music,
+  Database,
+  Search
+} from 'lucide-react';
+
+export default function App() {
+  const [sidebarOpen, setSidebarOpen] = useState(true);
+
+  const navItems = [
+    { icon: MessageSquare, label: '对话', active: true },
+    { icon: Bot, label: '智能体' },
+    { icon: Wrench, label: '技能' },
+    { icon: Brain, label: '记忆' },
+    { icon: ListChecks, label: '任务管理' },
+  ];
+
+  const recentChats = [
+    'CM助手初次问候交谈',
+    'Untitled',
+    'Untitled',
+    'Untitled',
+    '帮我写一个500字的文案',
+    '帮我生成一个写论文的实例',
+  ];
+
+  const suggestions = [
+    { icon: Code2, label: 'Build an Android app', color: 'text-green-600', bg: 'bg-green-50' },
+    { icon: Languages, label: 'Convert text to speech', color: 'text-blue-600', bg: 'bg-blue-50' },
+    { icon: Music, label: 'Generate music', color: 'text-purple-600', bg: 'bg-purple-50' },
+    { icon: Database, label: 'Add database and auth', color: 'text-cyan-600', bg: 'bg-cyan-50' },
+  ];
+
+  return (
+    <div className="flex h-screen w-full bg-white font-sans text-gray-900 overflow-hidden">
+      {/* Sidebar */}
+      <motion.aside
+        initial={false}
+        animate={{ width: sidebarOpen ? 280 : 0, opacity: sidebarOpen ? 1 : 0 }}
+        className="relative bg-gray-50 border-r border-gray-100 flex flex-col h-full"
+      >
+        <div className="p-4 flex items-center justify-between">
+          <div className="flex items-center gap-2 px-2 py-1.5 bg-red-50 text-red-700 rounded-lg cursor-pointer">
+            <Plus size={18} />
+            <span className="font-medium text-sm">新对话</span>
+          </div>
+        </div>
+
+        <nav className="flex-1 overflow-y-auto px-2 space-y-1">
+          <div className="space-y-1 pb-4">
+            {navItems.map((item) => (
+              <div
+                key={item.label}
+                className={`flex items-center gap-3 px-3 py-2 rounded-xl cursor-pointer transition-colors ${
+                  item.active ? 'bg-white shadow-sm font-medium' : 'hover:bg-gray-100 text-gray-600'
+                }`}
+              >
+                <item.icon size={18} />
+                <span className="text-sm">{item.label}</span>
+              </div>
+            ))}
+          </div>
+
+          <div className="pt-4 border-t border-gray-200">
+            <h3 className="px-3 mb-2 text-xs font-semibold text-gray-400 uppercase tracking-wider">
+              最近对话
+            </h3>
+            {recentChats.map((chat, idx) => (
+              <div
+                key={idx}
+                className="px-3 py-1.5 text-sm text-gray-600 hover:bg-gray-100 rounded-lg cursor-pointer truncate"
+              >
+                {chat}
+              </div>
+            ))}
+          </div>
+        </nav>
+
+        <div className="p-4 border-t border-gray-200">
+          <div className="flex items-center gap-3 px-3 py-2 text-gray-600 hover:bg-gray-100 rounded-xl cursor-pointer">
+            <Settings size={18} />
+            <span className="text-sm">设置和更多</span>
+          </div>
+        </div>
+      </motion.aside>
+
+      {/* Main Content */}
+      <main className="flex-1 flex flex-col relative h-full overflow-y-auto">
+        {/* Top bar */}
+        <header className="absolute top-0 w-full p-4 flex items-center justify-between z-10">
+          <button
+            onClick={() => setSidebarOpen(!sidebarOpen)}
+            className="p-2 hover:bg-gray-100 rounded-lg text-gray-500 transition-colors"
+          >
+            <Menu size={20} />
+          </button>
+          
+          <div className="flex items-center gap-2">
+            <button className="p-2 hover:bg-gray-100 rounded-lg text-gray-500 transition-colors">
+              <Settings size={20} />
+            </button>
+            <div className="w-8 h-8 rounded-full bg-gradient-to-tr from-blue-400 to-purple-400 flex items-center justify-center text-white shadow-sm ring-2 ring-white cursor-pointer overflow-hidden">
+              <User size={16} />
+            </div>
+          </div>
+        </header>
+
+        {/* Center Canvas */}
+        <div className="flex-1 flex flex-col items-center justify-center px-4 max-w-4xl mx-auto w-full pt-16">
+          <motion.div
+            initial={{ opacity: 0, y: 20 }}
+            animate={{ opacity: 1, y: 0 }}
+            className="text-center mb-12 relative"
+          >
+            <div className="absolute -top-16 left-1/2 -translate-x-1/2 opacity-10 blur-2xl pointer-events-none">
+              <Sparkles size={120} className="text-blue-500 animate-pulse" />
+            </div>
+            <h1 className="text-5xl font-display font-medium tracking-tight bg-clip-text text-transparent bg-gradient-to-r from-gray-900 to-gray-500 mb-4 px-4">
+              Build your ideas with Gemini
+            </h1>
+            <Sparkles className="absolute -right-8 top-0 text-blue-200 opacity-50" size={48} />
+          </motion.div>
+
+          {/* Search/Input Area */}
+          <motion.div
+             initial={{ opacity: 0, scale: 0.95 }}
+             animate={{ opacity: 1, scale: 1 }}
+             transition={{ delay: 0.1 }}
+             className="w-full max-w-2xl relative group"
+          >
+            <div className="gemini-gradient-border gemini-shadow rounded-3xl bg-white p-2">
+              <div className="flex flex-col p-4 space-y-4">
+                <textarea
+                  placeholder="Describe an app and let Gemini do the rest"
+                  className="w-full bg-transparent resize-none focus:outline-none text-lg text-gray-700 min-h-[80px]"
+                />
+                
+                <div className="flex items-center justify-between pt-2">
+                  <div className="flex items-center gap-2">
+                    <button className="p-2 hover:bg-gray-100 rounded-full text-gray-400 transition-colors">
+                      <Mic size={20} />
+                    </button>
+                    <button className="p-2 hover:bg-gray-100 rounded-full text-gray-400 transition-colors">
+                      <Plus size={20} />
+                    </button>
+                  </div>
+                  
+                  <button className="flex items-center gap-2 px-5 py-2.5 bg-gray-50 hover:bg-gray-100 text-gray-700 rounded-full border border-gray-200 transition-all font-medium text-sm group/btn shadow-sm">
+                    <Sparkles size={16} className="text-blue-500" />
+                    I'm feeling lucky
+                    <ArrowRight size={14} className="opacity-0 -translate-x-2 group-hover/btn:opacity-100 group-hover/btn:translate-x-0 transition-all" />
+                  </button>
+                </div>
+              </div>
+            </div>
+          </motion.div>
+
+          {/* Suggestion Chips */}
+          <div className="mt-8 flex flex-wrap justify-center gap-3">
+            {suggestions.map((suggestion, idx) => (
+              <motion.button
+                key={suggestion.label}
+                initial={{ opacity: 0, y: 10 }}
+                animate={{ opacity: 1, y: 0 }}
+                transition={{ delay: 0.2 + idx * 0.05 }}
+                whileHover={{ scale: 1.02 }}
+                whileTap={{ scale: 0.98 }}
+                className={`flex items-center gap-2 px-4 py-2.5 rounded-2xl border border-gray-100 bg-white hover:bg-gray-50 shadow-sm transition-all text-sm font-medium group hover:border-gray-200 text-gray-700`}
+              >
+                <suggestion.icon className={`w-4 h-4 ${suggestion.color}`} />
+                {suggestion.label}
+              </motion.button>
+            ))}
+            <motion.button
+               initial={{ opacity: 0, y: 10 }}
+               animate={{ opacity: 1, y: 0 }}
+               transition={{ delay: 0.4 }}
+               className="flex items-center justify-center p-2 rounded-full border border-gray-100 bg-white hover:bg-gray-50 text-gray-400 shadow-sm transition-all"
+            >
+              <ArrowRight size={16} />
+            </motion.button>
+          </div>
+        </div>
+
+        {/* Footer info/links */}
+        <footer className="w-full max-w-4xl mx-auto px-4 py-12 mt-auto">
+          <div className="rounded-3xl border border-gray-100 bg-gray-50/50 p-8 flex items-center justify-between group hover:bg-gray-50 transition-colors">
+            <div>
+              <h2 className="text-2xl font-display font-medium text-gray-800 mb-1">
+                Discover and remix app ideas
+              </h2>
+              <p className="text-gray-500 text-sm italic">
+                (Gallery view pending implementation)
+              </p>
+            </div>
+            <button className="flex items-center gap-2 px-6 py-2.5 bg-white border border-gray-200 rounded-xl hover:shadow-md transition-all font-medium text-gray-700">
+              Browse the app gallery
+              <ArrowRight size={18} />
+            </button>
+          </div>
+        </footer>
+        
+        {/* Floating Right Bar (from target image) */}
+        <div className="absolute right-6 top-1/2 -translate-y-1/2 flex flex-col gap-4">
+          <button className="p-2.5 bg-white shadow-lg border border-gray-100 rounded-xl hover:scale-110 transition-all text-gray-400">
+            <LayoutGrid size={22} />
+          </button>
+          <button className="p-2.5 bg-white shadow-lg border border-gray-100 rounded-xl hover:scale-110 transition-all text-gray-400">
+            <Languages size={22} />
+          </button>
+        </div>
+      </main>
+    </div>
+  );
+}
diff --git a/cankaoyangshi/src/index.css b/cankaoyangshi/src/index.css
new file mode 100644
index 00000000..0e2828a0
--- /dev/null
+++ b/cankaoyangshi/src/index.css
@@ -0,0 +1,71 @@
+@import "tailwindcss";
+
+@theme {
+  --font-sans: "Inter", ui-sans-serif, system-ui, sans-serif;
+  --font-display: "Outfit", "Inter", sans-serif;
+}
+
+@layer base {
+  body {
+    @apply bg-white text-gray-900 antialiased;
+  }
+}
+
+@layer utilities {
+  .gemini-shadow {
+    box-shadow: 0 0 20px rgba(66, 133, 244, 0.08),
+                0 0 40px rgba(219, 68, 55, 0.04),
+                0 0 60px rgba(244, 180, 0, 0.04),
+                0 0 80px rgba(15, 157, 88, 0.04);
+  }
+  
+  .gemini-gradient-border {
+    position: relative;
+    background: white;
+    border-radius: 1.5rem; /* rounded-3xl */
+    z-index: 0;
+    overflow: hidden;
+  }
+  
+  .gemini-gradient-border::before {
+    content: '';
+    position: absolute;
+    width: 150%;
+    height: 150%;
+    top: -25%;
+    left: -25%;
+    background: conic-gradient(
+      from 0deg,
+      transparent 0deg,
+      transparent 90deg,
+      #4285F4 120deg,
+      #DB4437 150deg,
+      #F4B400 180deg,
+      #0F9D58 210deg,
+      transparent 240deg
+    );
+    z-index: -2;
+    animation: rotate 3s linear infinite;
+    filter: blur(15px);
+  }
+
+  .gemini-gradient-border::after {
+    content: '';
+    position: absolute;
+    inset: 1.5px; /* The "thickness" of the glow border */
+    background: white;
+    border-radius: calc(1.5rem - 1px);
+    z-index: -1;
+  }
+
+  @keyframes rotate {
+    from {
+      transform: rotate(0deg);
+    }
+    to {
+      transform: rotate(360deg);
+    }
+  }
+}
+
+@import url('https://fonts.googleapis.com/css2?family=Inter:wght@400;500;600&family=Outfit:wght@400;500;600&display=swap');
diff --git a/cankaoyangshi/src/main.tsx b/cankaoyangshi/src/main.tsx
new file mode 100644
index 00000000..080dac37
--- /dev/null
+++ b/cankaoyangshi/src/main.tsx
@@ -0,0 +1,10 @@
+import {StrictMode} from 'react';
+import {createRoot} from 'react-dom/client';
+import App from './App.tsx';
+import './index.css';
+
+createRoot(document.getElementById('root')!).render(
+  <StrictMode>
+    <App />
+  </StrictMode>,
+);
diff --git a/cankaoyangshi/tsconfig.json b/cankaoyangshi/tsconfig.json
new file mode 100644
index 00000000..d88f175b
--- /dev/null
+++ b/cankaoyangshi/tsconfig.json
@@ -0,0 +1,26 @@
+{
+  "compilerOptions": {
+    "target": "ES2022",
+    "experimentalDecorators": true,
+    "useDefineForClassFields": false,
+    "module": "ESNext",
+    "lib": [
+      "ES2022",
+      "DOM",
+      "DOM.Iterable"
+    ],
+    "skipLibCheck": true,
+    "moduleResolution": "bundler",
+    "isolatedModules": true,
+    "moduleDetection": "force",
+    "allowJs": true,
+    "jsx": "react-jsx",
+    "paths": {
+      "@/*": [
+        "./*"
+      ]
+    },
+    "allowImportingTsExtensions": true,
+    "noEmit": true
+  }
+}
diff --git a/cankaoyangshi/vite.config.ts b/cankaoyangshi/vite.config.ts
new file mode 100644
index 00000000..fc23e76f
--- /dev/null
+++ b/cankaoyangshi/vite.config.ts
@@ -0,0 +1,22 @@
+import tailwindcss from '@tailwindcss/vite';
+import react from '@vitejs/plugin-react';
+import path from 'path';
+import {defineConfig} from 'vite';
+
+export default defineConfig(() => {
+  return {
+    plugins: [react(), tailwindcss()],
+    resolve: {
+      alias: {
+        '@': path.resolve(__dirname, '.'),
+      },
+    },
+    server: {
+      // HMR is disabled in AI Studio via DISABLE_HMR env var.
+      // Do not modify—file watching is disabled to prevent flickering during agent edits.
+      hmr: process.env.DISABLE_HMR !== 'true',
+      // Disable file watching when DISABLE_HMR is true to save CPU during agent edits.
+      watch: process.env.DISABLE_HMR === 'true' ? null : {},
+    },
+  };
+});
diff --git a/frontend-web/src/open-canvas/components/ai-writing/CollapseTransition.tsx b/frontend-web/src/open-canvas/components/ai-writing/CollapseTransition.tsx
new file mode 100644
index 00000000..16c7d881
--- /dev/null
+++ b/frontend-web/src/open-canvas/components/ai-writing/CollapseTransition.tsx
@@ -0,0 +1,34 @@
+import type { ReactNode } from 'react';
+import { cn } from '@/lib/utils';
+
+interface CollapseTransitionProps {
+  open: boolean;
+  className?: string;
+  innerClassName?: string;
+  duration?: number;
+  children: ReactNode;
+}
+
+export function CollapseTransition({
+  open,
+  className,
+  innerClassName,
+  duration = 200,
+  children,
+}: CollapseTransitionProps) {
+  return (
+    <div
+      aria-hidden={!open}
+      style={{ transitionDuration: `${duration}ms` }}
+      className={cn(
+        'grid overflow-hidden transition-[grid-template-rows,opacity] ease-out',
+        open ? 'grid-rows-[1fr] opacity-100' : 'grid-rows-[0fr] opacity-0 pointer-events-none',
+        className,
+      )}
+    >
+      <div className={cn('min-h-0 overflow-hidden', innerClassName)}>
+        {children}
+      </div>
+    </div>
+  );
+}
diff --git a/frontend-web/src/open-canvas/components/ai-writing/CompletedInterventionCard.tsx b/frontend-web/src/open-canvas/components/ai-writing/CompletedInterventionCard.tsx
index 5cbc9d99..6cac4be1 100644
--- a/frontend-web/src/open-canvas/components/ai-writing/CompletedInterventionCard.tsx
+++ b/frontend-web/src/open-canvas/components/ai-writing/CompletedInterventionCard.tsx
@@ -1,6 +1,6 @@
 import { useState } from 'react';
 import {
-  CheckCircle2, ChevronRight, ChevronDown,
+  CheckCircle2, ChevronRight,
   ExternalLink, ListTree, FileText,
 } from 'lucide-react';
 import { cn } from '@/lib/utils';
@@ -9,6 +9,7 @@ import type { AIMaterial, CompletedIntervention } from '../../types/ai-writing';
 import { OutlineCard } from './OutlineCard';
 import { ReviewCard } from './ReviewCard';
 import { ScoreBar } from './ScoreBar';
+import { CollapseTransition } from './CollapseTransition';
 
 interface Props {
   record: CompletedIntervention;
@@ -57,19 +58,22 @@ function MaterialCompleted({ record, expanded, onToggle }: { record: CompletedIn
           )}
         </span>
         {count > 0 && (
-          expanded
-            ? <ChevronDown className="size-3 text-muted-foreground" />
-            : <ChevronRight className="size-3 text-muted-foreground" />
+          <ChevronRight
+            className={cn(
+              'size-3 text-muted-foreground transition-transform duration-200',
+              expanded && 'rotate-90',
+            )}
+          />
         )}
       </button>
 
-      {expanded && record.materials && record.materials.length > 0 && (
-        <div className="px-2.5 pb-2.5 pt-1 space-y-1.5 border-t border-green-200/40 dark:border-green-900/20">
-          {record.materials.map((m) => (
+      <CollapseTransition open={expanded && !!record.materials && record.materials.length > 0}>
+        <div className="px-2.5 pb-2.5 pt-1.5 space-y-1.5 border-t border-green-200/40 dark:border-green-900/20">
+          {record.materials?.map((m) => (
             <CompletedMaterialItem key={m.id} material={m} />
           ))}
         </div>
-      )}
+      </CollapseTransition>
     </div>
   );
 }
@@ -102,9 +106,12 @@ function CompletedMaterialItem({ material }: { material: AIMaterial }) {
         <div className="flex items-start gap-1.5">
           <span className="flex-1 font-medium leading-snug line-clamp-2">{material.title}</span>
           {hasDetail && (
-            open
-              ? <ChevronDown className="mt-0.5 size-3 shrink-0 text-muted-foreground" />
-              : <ChevronRight className="mt-0.5 size-3 shrink-0 text-muted-foreground" />
+            <ChevronRight
+              className={cn(
+                'mt-0.5 size-3 shrink-0 text-muted-foreground transition-transform duration-200',
+                open && 'rotate-90',
+              )}
+            />
           )}
         </div>
         <div className="flex items-center gap-2 text-muted-foreground">
@@ -120,7 +127,7 @@ function CompletedMaterialItem({ material }: { material: AIMaterial }) {
         </div>
       </button>
 
-      {open && hasDetail && (
+      <CollapseTransition open={open && hasDetail}>
         <div className="px-2.5 pb-2 pt-1.5 space-y-1.5 border-t border-border/40">
           {material.content && (
             <p className="text-muted-foreground leading-relaxed line-clamp-6">
@@ -139,7 +146,7 @@ function CompletedMaterialItem({ material }: { material: AIMaterial }) {
             </button>
           )}
         </div>
-      )}
+      </CollapseTransition>
     </div>
   );
 }
@@ -168,17 +175,20 @@ function OutlineCompleted({ record, expanded, onToggle }: { record: CompletedInt
           <span className="ml-1 text-muted-foreground font-normal">共 {sectionCount} 章节</span>
         </span>
         {record.outline && (
-          expanded
-            ? <ChevronDown className="size-3 text-muted-foreground" />
-            : <ChevronRight className="size-3 text-muted-foreground" />
+          <ChevronRight
+            className={cn(
+              'size-3 text-muted-foreground transition-transform duration-200',
+              expanded && 'rotate-90',
+            )}
+          />
         )}
       </button>
 
-      {expanded && record.outline && (
+      <CollapseTransition open={expanded && !!record.outline}>
         <div className="px-2.5 pb-2.5 pt-1 border-t border-green-200/40 dark:border-green-900/20">
-          <OutlineCard outline={record.outline} readOnly />
+          {record.outline && <OutlineCard outline={record.outline} readOnly />}
         </div>
-      )}
+      </CollapseTransition>
     </div>
   );
 }
@@ -217,17 +227,20 @@ function DraftCompleted({ record, expanded, onToggle }: { record: CompletedInter
           {wordCount > 0 && <span className="ml-1">（{wordCount} 字）</span>}
         </span>
         {hasReview && (
-          expanded
-            ? <ChevronDown className="size-3 text-muted-foreground" />
-            : <ChevronRight className="size-3 text-muted-foreground" />
+          <ChevronRight
+            className={cn(
+              'size-3 text-muted-foreground transition-transform duration-200',
+              expanded && 'rotate-90',
+            )}
+          />
         )}
       </button>
 
-      {expanded && record.reviewResult && (
+      <CollapseTransition open={expanded && !!record.reviewResult}>
         <div className="px-2.5 pb-2.5 pt-1 border-t border-green-200/40 dark:border-green-900/20">
-          <ReviewCard review={record.reviewResult} />
+          {record.reviewResult && <ReviewCard review={record.reviewResult} />}
         </div>
-      )}
+      </CollapseTransition>
     </div>
   );
 }
@@ -259,19 +272,26 @@ function ReviewCompleted({ record, expanded, onToggle }: { record: CompletedInte
           </span>
         )}
         {hasReview && (
-          expanded
-            ? <ChevronDown className="size-3 text-muted-foreground" />
-            : <ChevronRight className="size-3 text-muted-foreground" />
+          <ChevronRight
+            className={cn(
+              'size-3 text-muted-foreground transition-transform duration-200',
+              expanded && 'rotate-90',
+            )}
+          />
         )}
       </button>
 
-      {expanded && record.reviewResult && (
+      <CollapseTransition open={expanded && !!record.reviewResult}>
         <div className="px-2.5 pb-2.5 pt-1 space-y-1.5 border-t border-green-200/40 dark:border-green-900/20">
-          <ScoreBar label="事实准确性" score={record.reviewResult.factScore} />
-          <ScoreBar label="逻辑结构" score={record.reviewResult.logicScore} />
-          <ScoreBar label="语言文字" score={record.reviewResult.languageScore} />
+          {record.reviewResult && (
+            <>
+              <ScoreBar label="事实准确性" score={record.reviewResult.factScore} />
+              <ScoreBar label="逻辑结构" score={record.reviewResult.logicScore} />
+              <ScoreBar label="语言文字" score={record.reviewResult.languageScore} />
+            </>
+          )}
         </div>
-      )}
+      </CollapseTransition>
     </div>
   );
 }
diff --git a/frontend-web/src/open-canvas/components/ai-writing/DraftStreamingView.tsx b/frontend-web/src/open-canvas/components/ai-writing/DraftStreamingView.tsx
index 15507259..db6dc7f1 100644
--- a/frontend-web/src/open-canvas/components/ai-writing/DraftStreamingView.tsx
+++ b/frontend-web/src/open-canvas/components/ai-writing/DraftStreamingView.tsx
@@ -1,7 +1,8 @@
 import { useEffect, useRef, useState } from 'react';
-import { Brain, ChevronDown, ChevronRight } from 'lucide-react';
+import { Brain, ChevronRight } from 'lucide-react';
 import { cn } from '@/lib/utils';
 import type { StreamingDraftSection } from '../../types/ai-writing';
+import { CollapseTransition } from './CollapseTransition';
 
 interface DraftStreamingViewProps {
   title: string;
@@ -40,10 +41,10 @@ function SectionThinking({ thinkingText, isDone }: { thinkingText: string; isDon
         <Brain className="size-3 text-amber-500 shrink-0" />
         <span className="text-[11px] font-medium text-amber-600 dark:text-amber-400">思考过程</span>
         <span className="ml-auto text-amber-400">
-          {open ? <ChevronDown className="size-3" /> : <ChevronRight className="size-3" />}
+          <ChevronRight className={cn('size-3 transition-transform duration-200', open && 'rotate-90')} />
         </span>
       </button>
-      {open && (
+      <CollapseTransition open={open}>
         <pre
           ref={preRef}
           className="text-[10px] font-mono leading-relaxed px-2.5 py-2 text-amber-700/70 dark:text-amber-300/60 whitespace-pre-wrap max-h-32 overflow-y-auto italic"
@@ -53,7 +54,7 @@ function SectionThinking({ thinkingText, isDone }: { thinkingText: string; isDon
             <span className="inline-block w-0.5 h-3 bg-amber-400 ml-0.5 align-text-bottom animate-[blink_1s_step-end_infinite]" />
           )}
         </pre>
-      )}
+      </CollapseTransition>
     </div>
   );
 }
diff --git a/frontend-web/src/open-canvas/components/ai-writing/MaterialItem.tsx b/frontend-web/src/open-canvas/components/ai-writing/MaterialItem.tsx
index ba30e5f3..539d90ff 100644
--- a/frontend-web/src/open-canvas/components/ai-writing/MaterialItem.tsx
+++ b/frontend-web/src/open-canvas/components/ai-writing/MaterialItem.tsx
@@ -1,8 +1,9 @@
 import { useState } from 'react';
-import { ChevronRight, ChevronDown, ExternalLink } from 'lucide-react';
+import { ChevronRight, ExternalLink } from 'lucide-react';
 import { cn } from '@/lib/utils';
 import { buildIntranetSourceUrl } from '@/core/config';
 import type { AIMaterial } from '../../types/ai-writing';
+import { CollapseTransition } from './CollapseTransition';
 
 interface MaterialItemProps {
   material: AIMaterial;
@@ -52,9 +53,12 @@ export function MaterialItem({ material, checked, onToggle }: MaterialItemProps)
           <span className={cn('flex-1 font-medium leading-snug line-clamp-2', !checked && 'text-muted-foreground')}>
             {material.title}
           </span>
-          {expanded
-            ? <ChevronDown className="mt-0.5 size-3 shrink-0 text-muted-foreground" />
-            : <ChevronRight className="mt-0.5 size-3 shrink-0 text-muted-foreground" />}
+          <ChevronRight
+            className={cn(
+              'mt-0.5 size-3 shrink-0 text-muted-foreground transition-transform duration-200',
+              expanded && 'rotate-90',
+            )}
+          />
         </button>
       </div>
 
@@ -83,7 +87,7 @@ export function MaterialItem({ material, checked, onToggle }: MaterialItemProps)
       </div>
 
       {/* 展开内容 */}
-      {expanded && (
+      <CollapseTransition open={expanded}>
         <div className="px-2.5 pb-2.5 pl-8 space-y-1.5 border-t">
           <p className="text-muted-foreground leading-relaxed pt-2 line-clamp-6">
             {material.content.slice(0, 300)}
@@ -102,7 +106,7 @@ export function MaterialItem({ material, checked, onToggle }: MaterialItemProps)
             </button>
           )}
         </div>
-      )}
+      </CollapseTransition>
     </div>
   );
 }
diff --git a/frontend-web/src/open-canvas/components/ai-writing/MaterialsCard.tsx b/frontend-web/src/open-canvas/components/ai-writing/MaterialsCard.tsx
index b8e9ec9a..ad1e1df5 100644
--- a/frontend-web/src/open-canvas/components/ai-writing/MaterialsCard.tsx
+++ b/frontend-web/src/open-canvas/components/ai-writing/MaterialsCard.tsx
@@ -1,7 +1,9 @@
 import { useState } from 'react';
-import { ChevronDown, ChevronRight, FileText } from 'lucide-react';
+import { ChevronRight, FileText } from 'lucide-react';
+import { cn } from '@/lib/utils';
 import type { AIMaterial } from '../../types/ai-writing';
 import { MaterialItem } from './MaterialItem';
+import { CollapseTransition } from './CollapseTransition';
 
 interface MaterialsCardProps {
   materials: AIMaterial[];
@@ -27,14 +29,17 @@ export function MaterialsCard({ materials, selectedIds, onToggle }: MaterialsCar
             （共 {materials.length} 条，已选 {selectedIds.size} 条）
           </span>
         </span>
-        {expanded
-          ? <ChevronDown className="size-3 text-muted-foreground" />
-          : <ChevronRight className="size-3 text-muted-foreground" />}
+        <ChevronRight
+          className={cn(
+            'size-3 text-muted-foreground transition-transform duration-200',
+            expanded && 'rotate-90',
+          )}
+        />
       </button>
 
       {/* 列表 */}
-      {expanded && (
-        <div className="px-2.5 pb-2.5 space-y-1.5 border-t">
+      <CollapseTransition open={expanded}>
+        <div className="px-2.5 pb-2.5 pt-1.5 space-y-1.5 border-t">
           {materials.length === 0 ? (
             <p className="text-xs text-muted-foreground py-2 text-center">暂无素材</p>
           ) : (
@@ -48,7 +53,7 @@ export function MaterialsCard({ materials, selectedIds, onToggle }: MaterialsCar
             ))
           )}
         </div>
-      )}
+      </CollapseTransition>
     </div>
   );
 }
diff --git a/frontend-web/src/open-canvas/components/ai-writing/OutlineCard.tsx b/frontend-web/src/open-canvas/components/ai-writing/OutlineCard.tsx
index 08facb11..f70a36dc 100644
--- a/frontend-web/src/open-canvas/components/ai-writing/OutlineCard.tsx
+++ b/frontend-web/src/open-canvas/components/ai-writing/OutlineCard.tsx
@@ -3,6 +3,7 @@ import { ListTree, Plus } from 'lucide-react';
 import { Button } from '@/components/ui/button';
 import type { AIOutline, OutlineSection as OutlineSectionType } from '../../types/ai-writing';
 import { OutlineSection } from './OutlineSection';
+import { CollapseTransition } from './CollapseTransition';
 
 interface OutlineCardProps {
   outline: AIOutline;
@@ -69,7 +70,7 @@ export function OutlineCard({ outline, onChange, readOnly = false }: OutlineCard
         </button>
       </div>
 
-      {!collapsed && (
+      <CollapseTransition open={!collapsed}>
         <div className="px-3 py-2.5 space-y-2">
           {/* 文章标题 */}
           <div className="flex items-center gap-1.5 text-xs">
@@ -137,7 +138,7 @@ export function OutlineCard({ outline, onChange, readOnly = false }: OutlineCard
             </Button>
           )}
         </div>
-      )}
+      </CollapseTransition>
     </div>
   );
 }
diff --git a/frontend-web/src/open-canvas/components/ai-writing/OutlineSection.tsx b/frontend-web/src/open-canvas/components/ai-writing/OutlineSection.tsx
index 747df029..b4dfeeec 100644
--- a/frontend-web/src/open-canvas/components/ai-writing/OutlineSection.tsx
+++ b/frontend-web/src/open-canvas/components/ai-writing/OutlineSection.tsx
@@ -1,7 +1,8 @@
 import { useState } from 'react';
-import { ChevronRight, ChevronDown, Plus, X, GripVertical } from 'lucide-react';
+import { ChevronRight, Plus, X, GripVertical } from 'lucide-react';
 import { cn } from '@/lib/utils';
 import type { OutlineSection as OutlineSectionType } from '../../types/ai-writing';
+import { CollapseTransition } from './CollapseTransition';
 
 interface OutlineSectionProps {
   section: OutlineSectionType;
@@ -72,9 +73,12 @@ export function OutlineSection({
           onClick={() => setExpanded((v) => !v)}
           className="shrink-0"
         >
-          {expanded
-            ? <ChevronDown className="size-3.5 text-muted-foreground" />
-            : <ChevronRight className="size-3.5 text-muted-foreground" />}
+          <ChevronRight
+            className={cn(
+              'size-3.5 text-muted-foreground transition-transform duration-200',
+              expanded && 'rotate-90',
+            )}
+          />
         </button>
 
         <span className="text-muted-foreground/60 shrink-0 w-4 text-center">{index + 1}.</span>
@@ -109,7 +113,7 @@ export function OutlineSection({
       </div>
 
       {/* 要点列表 */}
-      {expanded && (
+      <CollapseTransition open={expanded}>
         <div className="px-8 pb-2.5 space-y-1 border-t">
           {section.keyPoints.map((kp, i) => (
             <div key={i} className="flex items-center gap-1.5 pt-1.5">
@@ -142,7 +146,7 @@ export function OutlineSection({
             </button>
           )}
         </div>
-      )}
+      </CollapseTransition>
     </div>
   );
 }