diff --git a/src/components/tabs/MarkdownTabPage/MarkdownTabPage.tsx b/src/components/tabs/MarkdownTabPage/MarkdownTabPage.tsx
index 1adfff7..faea37c 100644
--- a/src/components/tabs/MarkdownTabPage/MarkdownTabPage.tsx
+++ b/src/components/tabs/MarkdownTabPage/MarkdownTabPage.tsx
@@ -29,7 +29,7 @@ export const MarkdownTabPage: React.FC<MarkdownTabPageProps> = ({
 
   return (
     <div
-      className="max-w-4xl mx-auto w-full"
+      className="w-full px-10 py-4"
       style={{ zoom: zoom / 100 }}
     >
       <div className="h-full w-full">
diff --git a/src/modules/home/HomePage.tsx b/src/modules/home/HomePage.tsx
index 93a6f2f..b3dbc32 100644
--- a/src/modules/home/HomePage.tsx
+++ b/src/modules/home/HomePage.tsx
@@ -1,9 +1,5 @@
+import { ChatLayout } from './components/ChatLayout'
+
 export const HomePage = () => {
-  return (
-    <div className="flex items-center justify-center h-full">
-      <h1 className="text-3xl font-light text-gray-600 dark:text-gray-300">
-        开始今天的工作吧！
-      </h1>
-    </div>
-  )
+  return <ChatLayout />
 }
diff --git a/src/modules/home/components/ChatContent.tsx b/src/modules/home/components/ChatContent.tsx
new file mode 100644
index 0000000..1fc98b3
--- /dev/null
+++ b/src/modules/home/components/ChatContent.tsx
@@ -0,0 +1,120 @@
+import { Send } from 'lucide-react'
+import { useChatStore, type ChatMessage } from '@/stores/chatStore'
+import { useState, useRef, useEffect } from 'react'
+
+const MessageItem = ({ message }: { message: ChatMessage }) => {
+  const isUser = message.role === 'user'
+
+  return (
+    <div className={`flex ${isUser ? 'justify-end' : 'justify-start'} mb-4`}>
+      <div
+        className={`flex gap-3 max-w-[80%] ${
+          isUser ? 'flex-row-reverse' : 'flex-row'
+        }`}
+      >
+        <div className={`w-8 h-8 rounded-full flex items-center justify-center shrink-0 ${
+          isUser ? 'bg-gray-600' : 'bg-green-600'
+        }`}>
+          {isUser ? (
+            <span className="text-white text-sm">👤</span>
+          ) : (
+            <span className="text-white text-sm">🤖</span>
+          )}
+        </div>
+        <div
+          className={`px-4 py-2.5 rounded-lg text-sm leading-relaxed whitespace-pre-wrap ${
+            isUser
+              ? 'bg-[#343541] text-white'
+              : 'bg-transparent text-gray-100'
+          }`}
+        >
+          {message.content}
+        </div>
+      </div>
+    </div>
+  )
+}
+
+export const ChatContent = () => {
+  const { currentChatId, chats, addMessage, updateChatTitle } = useChatStore()
+  const [input, setInput] = useState('')
+  const messagesEndRef = useRef<HTMLDivElement>(null)
+
+  const currentChat = chats.find((c) => c.id === currentChatId)
+  const messages = currentChat?.messages ?? []
+
+  useEffect(() => {
+    messagesEndRef.current?.scrollIntoView({ behavior: 'smooth' })
+  }, [messages.length])
+
+  const handleSend = () => {
+    if (!input.trim() || !currentChatId) return
+
+    const userMessage: ChatMessage = {
+      id: Math.random().toString(36).substring(2, 15),
+      role: 'user',
+      content: input.trim(),
+      timestamp: Date.now(),
+    }
+
+    addMessage(currentChatId, userMessage)
+
+    if (messages.length === 0) {
+      const title = input.trim().slice(0, 20) + (input.trim().length > 20 ? '...' : '')
+      updateChatTitle(currentChatId, title)
+    }
+
+    setInput('')
+  }
+
+  const handleKeyDown = (e: React.KeyboardEvent) => {
+    if (e.key === 'Enter' && !e.shiftKey) {
+      e.preventDefault()
+      handleSend()
+    }
+  }
+
+  return (
+    <div className="flex-1 flex flex-col h-full bg-[#343541]">
+      <div className="flex-1 overflow-y-auto px-4 py-4">
+        {messages.length === 0 ? (
+          <div className="flex items-center justify-center h-full">
+            <h1 className="text-2xl font-light text-gray-400">
+              开始今天的工作吧！
+            </h1>
+          </div>
+        ) : (
+          <div className="max-w-3xl mx-auto pt-4">
+            {messages.map((msg) => (
+              <MessageItem key={msg.id} message={msg} />
+            ))}
+            <div ref={messagesEndRef} />
+          </div>
+        )}
+      </div>
+
+      <div className="px-4 pb-4">
+        <div className="max-w-3xl mx-auto flex gap-2 items-end">
+          <div className="flex-1">
+            <textarea
+              value={input}
+              onChange={(e) => setInput(e.target.value)}
+              onKeyDown={handleKeyDown}
+              placeholder="发送消息..."
+              rows={1}
+              className="w-full bg-[#40414f] text-white rounded-lg px-4 py-3 resize-none focus:outline-none focus:ring-2 focus:ring-green-500 placeholder-gray-400 text-sm"
+              style={{ minHeight: '48px', maxHeight: '200px' }}
+            />
+          </div>
+          <button
+            onClick={handleSend}
+            disabled={!input.trim()}
+            className="px-4 py-3 bg-green-600 hover:bg-green-700 disabled:bg-gray-600 disabled:cursor-not-allowed rounded-lg transition-colors shrink-0"
+          >
+            <Send size={18} className="text-white" />
+          </button>
+        </div>
+      </div>
+    </div>
+  )
+}
diff --git a/src/modules/home/components/ChatLayout.tsx b/src/modules/home/components/ChatLayout.tsx
new file mode 100644
index 0000000..729171f
--- /dev/null
+++ b/src/modules/home/components/ChatLayout.tsx
@@ -0,0 +1,11 @@
+import { ChatSidebar } from './ChatSidebar'
+import { ChatContent } from './ChatContent'
+
+export const ChatLayout = () => {
+  return (
+    <div className="flex h-full w-full overflow-hidden">
+      <ChatSidebar />
+      <ChatContent />
+    </div>
+  )
+}
diff --git a/src/modules/home/components/ChatSidebar.tsx b/src/modules/home/components/ChatSidebar.tsx
new file mode 100644
index 0000000..e151937
--- /dev/null
+++ b/src/modules/home/components/ChatSidebar.tsx
@@ -0,0 +1,53 @@
+import { Plus, Trash2 } from 'lucide-react'
+import { useChatStore } from '@/stores/chatStore'
+
+export const ChatSidebar = () => {
+  const { chats, currentChatId, createChat, deleteChat, selectChat } = useChatStore()
+
+  const handleNewChat = () => {
+    createChat()
+  }
+
+  return (
+    <div className="w-[260px] h-full flex flex-col bg-[#262626] dark:bg-[#262626]">
+      <button
+        onClick={handleNewChat}
+        className="flex items-center gap-2 px-3 py-2.5 mx-2 mt-2 rounded-md border border-gray-600 hover:bg-gray-700 transition-colors text-sm"
+      >
+        <Plus size={16} />
+        <span>新对话</span>
+      </button>
+
+      <div className="flex-1 overflow-y-auto mt-3 px-2">
+        {chats.map((chat) => (
+          <div
+            key={chat.id}
+            onClick={() => selectChat(chat.id)}
+            className={`group flex items-center justify-between px-3 py-2 rounded-md cursor-pointer text-sm mb-1 transition-colors ${
+              currentChatId === chat.id
+                ? 'bg-[#343541] text-white'
+                : 'text-gray-300 hover:bg-[#343541]/50'
+            }`}
+          >
+            <span className="truncate flex-1">{chat.title}</span>
+            <button
+              onClick={(e) => {
+                e.stopPropagation()
+                deleteChat(chat.id)
+              }}
+              className="opacity-0 group-hover:opacity-100 hover:text-red-400 transition-opacity p-1"
+            >
+              <Trash2 size={14} />
+            </button>
+          </div>
+        ))}
+
+        {chats.length === 0 && (
+          <div className="text-gray-500 text-sm text-center py-8">
+            暂无对话
+          </div>
+        )}
+      </div>
+    </div>
+  )
+}
diff --git a/src/modules/pydemos/PyDemosPage.tsx b/src/modules/pydemos/PyDemosPage.tsx
index 779ad21..695cde0 100644
--- a/src/modules/pydemos/PyDemosPage.tsx
+++ b/src/modules/pydemos/PyDemosPage.tsx
@@ -189,7 +189,7 @@ export const PyDemosPage: React.FC = () => {
       className="h-full w-full overflow-y-auto"
       onContextMenu={handleBackgroundContextMenu}
     >
-      <div className="max-w-4xl mx-auto w-full p-6 min-h-full">
+      <div className="max-w-4xl mx-auto w-full px-14 py-12 pb-40 min-h-full">
         <h1 className="text-2xl font-bold text-gray-800 dark:text-gray-200 mb-8 flex items-center gap-2">
           <Play className="w-8 h-8" />
           Python Demo
diff --git a/src/modules/remote/RemotePage.tsx b/src/modules/remote/RemotePage.tsx
index bcc7df0..8ab3cec 100644
--- a/src/modules/remote/RemotePage.tsx
+++ b/src/modules/remote/RemotePage.tsx
@@ -482,7 +482,7 @@ export const RemotePage: React.FC = () => {
   }
 
   return (
-    <div className="h-full flex flex-col">
+    <div className="w-full px-4 py-8 pb-16 h-full flex flex-col">
       <div className="pl-12 pt-6 pb-4 shrink-0">
         <h1 className="text-2xl font-bold text-gray-800 dark:text-gray-200 flex items-center gap-2 whitespace-nowrap">
           <Monitor className="w-8 h-8 shrink-0" />
@@ -490,11 +490,10 @@ export const RemotePage: React.FC = () => {
         </h1>
       </div>
 
-      <div className="flex-1 flex px-0 -ml-4">
-        <div className="absolute left-60 top-[88px] bottom-16 w-px bg-gray-300/40 dark:bg-gray-500/50" />
+      <div className="flex-1 flex">
         <div
           ref={listContainerRef}
-          className="w-56 shrink-0 pr-4 overflow-hidden select-none"
+          className="w-48 shrink-0 overflow-hidden select-none border-r border-gray-200 dark:border-gray-700 pr-3"
         >
           <button
             onClick={handleAddDevice}
diff --git a/src/modules/search/SearchPage.tsx b/src/modules/search/SearchPage.tsx
index a959b3d..e149227 100644
--- a/src/modules/search/SearchPage.tsx
+++ b/src/modules/search/SearchPage.tsx
@@ -75,7 +75,7 @@ export const SearchPage: React.FC = () => {
   }
 
   return (
-    <div className="max-w-4xl mx-auto w-full p-6">
+    <div className="max-w-4xl mx-auto w-full px-14 py-12 pb-40">
       <h1 className="text-2xl font-bold text-gray-800 dark:text-gray-200 mb-8 flex items-center gap-2">
         <Search className="w-8 h-8" />
         搜索
diff --git a/src/modules/time-tracking/TimeTrackingPage.tsx b/src/modules/time-tracking/TimeTrackingPage.tsx
index 2e17ad1..bd7850d 100644
--- a/src/modules/time-tracking/TimeTrackingPage.tsx
+++ b/src/modules/time-tracking/TimeTrackingPage.tsx
@@ -673,7 +673,7 @@ export const TimeTrackingPage: React.FC = () => {
   }
 
   return (
-    <div className="max-w-4xl mx-auto w-full p-6">
+    <div className="max-w-4xl mx-auto w-full px-14 py-12 pb-40">
       <h1 className="text-2xl font-bold text-gray-800 dark:text-gray-200 mb-8 flex items-center gap-2">
         <Clock className="w-8 h-8" />
         时间统计
diff --git a/src/modules/todo/TodoPage.tsx b/src/modules/todo/TodoPage.tsx
index 10d749b..52c6a7a 100644
--- a/src/modules/todo/TodoPage.tsx
+++ b/src/modules/todo/TodoPage.tsx
@@ -216,7 +216,7 @@ export const TodoPage: React.FC = () => {
   ])].sort()
 
   return (
-    <div className="max-w-4xl mx-auto w-full p-6">
+    <div className="max-w-4xl mx-auto w-full px-14 py-12 pb-40">
       <h1 className="text-2xl font-bold text-gray-800 dark:text-gray-200 mb-8 flex items-center gap-2">
         <ListTodo className="w-8 h-8" />
         TODO
@@ -260,7 +260,7 @@ export const TodoPage: React.FC = () => {
             const canEdit = isEditable(date)
 
             return (
-              <div key={date} className="space-y-2">
+              <div key={date} className="pt-4 space-y-2">
                 <div className="flex items-center gap-2">
                   <h3 className={`text-lg font-semibold ${isTodayDate
                       ? 'text-gray-900 dark:text-gray-100'
@@ -330,7 +330,7 @@ export const TodoPage: React.FC = () => {
                       ) : (
                         <span
                           onDoubleClick={() => canEdit && !item.completed && handleStartEdit(date, index, item.content)}
-                          className={`flex-1 ${canEdit ? 'cursor-pointer' : 'cursor-default'
+                          className={`flex-1 px-2 ${canEdit ? 'cursor-pointer' : 'cursor-default'}
                             } ${item.completed
                               ? 'text-gray-400 dark:text-gray-500 line-through'
                               : 'text-gray-700 dark:text-gray-200'
diff --git a/src/pages/NoteBrowser.tsx b/src/pages/NoteBrowser.tsx
index 3da2f39..81fa563 100644
--- a/src/pages/NoteBrowser.tsx
+++ b/src/pages/NoteBrowser.tsx
@@ -208,7 +208,6 @@ export const NoteBrowser = () => {
                     <TabContentCache
                       openFiles={openFiles}
                       activeFile={selectedFile}
-                      containerClassName="p-8 pb-40"
                       onTocUpdated={handleTocUpdated}
                     />
                   </div>
diff --git a/src/stores/chatStore.ts b/src/stores/chatStore.ts
new file mode 100644
index 0000000..dbf7e9c
--- /dev/null
+++ b/src/stores/chatStore.ts
@@ -0,0 +1,98 @@
+import { create } from 'zustand'
+import { persist } from 'zustand/middleware'
+
+export interface ChatMessage {
+  id: string
+  role: 'user' | 'assistant'
+  content: string
+  timestamp: number
+}
+
+export interface Chat {
+  id: string
+  title: string
+  messages: ChatMessage[]
+  createdAt: number
+  updatedAt: number
+}
+
+interface ChatState {
+  chats: Chat[]
+  currentChatId: string | null
+  
+  createChat: () => string
+  deleteChat: (id: string) => void
+  selectChat: (id: string) => void
+  updateChatTitle: (id: string, title: string) => void
+  
+  addMessage: (chatId: string, message: ChatMessage) => void
+  getCurrentChat: () => Chat | null
+}
+
+const generateId = () => Math.random().toString(36).substring(2, 15)
+
+export const useChatStore = create<ChatState>()(
+  persist(
+    (set, get) => ({
+      chats: [],
+      currentChatId: null,
+      
+      createChat: () => {
+        const id = generateId()
+        const now = Date.now()
+        const newChat: Chat = {
+          id,
+          title: '新对话',
+          messages: [],
+          createdAt: now,
+          updatedAt: now,
+        }
+        set((state) => ({
+          chats: [newChat, ...state.chats],
+          currentChatId: id,
+        }))
+        return id
+      },
+      
+      deleteChat: (id) => {
+        set((state) => {
+          const newChats = state.chats.filter((c) => c.id !== id)
+          const newCurrentId = state.currentChatId === id
+            ? (newChats[0]?.id ?? null)
+            : state.currentChatId
+          return { chats: newChats, currentChatId: newCurrentId }
+        })
+      },
+      
+      selectChat: (id) => {
+        set({ currentChatId: id })
+      },
+      
+      updateChatTitle: (id, title) => {
+        set((state) => ({
+          chats: state.chats.map((c) =>
+            c.id === id ? { ...c, title, updatedAt: Date.now() } : c
+          ),
+        }))
+      },
+      
+      addMessage: (chatId, message) => {
+        set((state) => ({
+          chats: state.chats.map((c) =>
+            c.id === chatId
+              ? { ...c, messages: [...c.messages, message], updatedAt: Date.now() }
+              : c
+          ),
+        }))
+      },
+      
+      getCurrentChat: () => {
+        const state = get()
+        return state.chats.find((c) => c.id === state.currentChatId) ?? null
+      },
+    }),
+    {
+      name: 'chat-storage',
+    }
+  )
+)