diff --git a/src/pages/chat/ChatPage.tsx b/src/pages/chat/ChatPage.tsx
index 5acac87..bb02799 100644
--- a/src/pages/chat/ChatPage.tsx
+++ b/src/pages/chat/ChatPage.tsx
@@ -7,6 +7,7 @@ import ChatHeader from './components/ChatHeader';
 import ChatBody from './components/ChatBody';
 import ChatInput from './components/ChatInput';
 import ChatDrawers from './components/ChatDrawers';
+import ChatOutline from './components/ChatOutline';
 import { useChatScroll } from './hooks/useChatScroll';
 import { useChatData } from './hooks/useChatData';
 import { useChatSender } from './hooks/useChatSender';
@@ -97,21 +98,35 @@ export default function ChatPage() {
               onClear={sender.handleClear}
             />
 
-            <ChatBody
-              bodyRef={bodyRef}
-              agent={agent}
-              messages={messages}
-              branches={branches}
-              highlightId={highlightId}
-              sending={sender.sending}
-              streaming={sender.streaming}
-              onRegenerate={sender.handleRegenerate}
-              onSwitchBranch={sender.handleSwitchBranch}
-              onCopy={(text, mode) => {
-                const content = mode === 'markdown' ? text : markdownToPlainText(text);
-                return navigator.clipboard?.writeText(content).then(() => message.success(mode === 'markdown' ? '已复制（Markdown）' : '已复制（纯文本）'));
-              }}
-            />
+            <div className="chat-content-row">
+              <ChatBody
+                bodyRef={bodyRef}
+                agent={agent}
+                messages={messages}
+                branches={branches}
+                highlightId={highlightId}
+                sending={sender.sending}
+                streaming={sender.streaming}
+                onRegenerate={sender.handleRegenerate}
+                onSwitchBranch={sender.handleSwitchBranch}
+                onCopy={(text, mode) => {
+                  const content = mode === 'markdown' ? text : markdownToPlainText(text);
+                  return navigator.clipboard
+                    ?.writeText(content)
+                    .then(() => message.success(mode === 'markdown' ? '已复制（Markdown）' : '已复制（纯文本）'));
+                }}
+              />
+
+              <ChatOutline
+                messages={messages}
+                activeId={highlightId}
+                onJump={(msgId) => {
+                  setHighlightId(msgId);
+                  const el = document.getElementById('msg-' + msgId);
+                  if (el) el.scrollIntoView({ block: 'start', behavior: 'smooth' });
+                }}
+              />
+            </div>
 
             <ChatInput
               input={sender.input}
diff --git a/src/pages/chat/components/ChatOutline.tsx b/src/pages/chat/components/ChatOutline.tsx
new file mode 100644
index 0000000..bcdc7d8
--- /dev/null
+++ b/src/pages/chat/components/ChatOutline.tsx
@@ -0,0 +1,41 @@
+import type { ChatMessage } from '../../../api';
+import { markdownToPlainText } from '../utils/copy';
+
+function summarize(content: string) {
+  const plain = markdownToPlainText(content);
+  const firstLine = plain
+    .split('\n')
+    .map((s) => s.trim())
+    .filter(Boolean)[0];
+  const text = (firstLine || plain.trim()).replace(/\s+/g, ' ');
+  if (text.length <= 44) return text;
+  return text.slice(0, 44) + '…';
+}
+
+export default function ChatOutline(props: { messages: ChatMessage[]; onJump: (id: string) => void; activeId?: string | null }) {
+  const { messages, onJump, activeId } = props;
+  const items = messages.filter((m) => m.role === 'assistant');
+
+  if (items.length === 0) return null;
+
+  return (
+    <aside className="chat-outline">
+      <div className="chat-outline-title">聊天段落</div>
+      <div className="chat-outline-list">
+        {items.map((m, idx) => (
+          <button
+            key={m.id}
+            type="button"
+            className={`chat-outline-item${activeId === m.id ? ' active' : ''}`}
+            onClick={() => onJump(m.id)}
+            title={summarize(m.content)}
+          >
+            <span className="chat-outline-index">{idx + 1}</span>
+            <span className="chat-outline-text">{summarize(m.content)}</span>
+          </button>
+        ))}
+      </div>
+    </aside>
+  );
+}
+
diff --git a/src/styles.css b/src/styles.css
index 2155f59..9084f08 100644
--- a/src/styles.css
+++ b/src/styles.css
@@ -482,6 +482,12 @@ body {
   position: relative;
 }
 
+.chat-content-row {
+  flex: 1;
+  min-height: 0;
+  display: flex;
+}
+
 .chat-header {
   height: 60px;
   padding: 0 24px;
@@ -552,6 +558,73 @@ body {
   background: var(--color-bg);
 }
 
+.chat-outline {
+  width: 260px;
+  border-left: 1px solid var(--color-border);
+  background: var(--color-surface);
+  padding: 14px 12px;
+  overflow: auto;
+}
+
+.chat-outline-title {
+  font-size: 12px;
+  font-weight: 600;
+  color: var(--color-text-secondary);
+  margin-bottom: 10px;
+}
+
+.chat-outline-list {
+  display: flex;
+  flex-direction: column;
+  gap: 6px;
+}
+
+.chat-outline-item {
+  border: 1px solid var(--color-border);
+  background: var(--color-surface);
+  border-radius: 10px;
+  padding: 8px 10px;
+  text-align: left;
+  cursor: pointer;
+  display: flex;
+  gap: 8px;
+  align-items: flex-start;
+  color: var(--color-text);
+}
+
+.chat-outline-item:hover {
+  border-color: var(--color-border-strong);
+  box-shadow: var(--shadow-xs);
+}
+
+.chat-outline-item.active {
+  border-color: var(--color-brand);
+  box-shadow: var(--shadow-focus);
+}
+
+.chat-outline-index {
+  font-size: 12px;
+  color: var(--color-text-tertiary);
+  line-height: 1.4;
+  flex: 0 0 auto;
+}
+
+.chat-outline-text {
+  font-size: 12.5px;
+  line-height: 1.4;
+  color: var(--color-text);
+  overflow: hidden;
+  display: -webkit-box;
+  -webkit-line-clamp: 3;
+  -webkit-box-orient: vertical;
+}
+
+@media (max-width: 1100px) {
+  .chat-outline {
+    display: none;
+  }
+}
+
 .chat-body .messages-container {
   max-width: 780px;
   width: 100%;