diff --git a/src/components/chat/HistoryList.vue b/src/components/chat/HistoryList.vue
index 5859bad..e9355bd 100644
--- a/src/components/chat/HistoryList.vue
+++ b/src/components/chat/HistoryList.vue
@@ -1,38 +1,68 @@
 <template>
-  <el-menu-item-group class="history-item-group" v-show="!isCollapsed">
-    <template #title>
-      <el-icon><Clock /></el-icon>
-      <span>历史会话</span>
-    </template>
-    <template v-if="currentModeHistory.length">
-      <el-menu-item 
-        v-for="chat in currentModeHistory" 
-        :key="chat.conversationId"
-        :index="chat.conversationId"
-        class="history-item"
-      >
-        <div class="history-content">
-          <span class="history-title">{{ formatChatTitle(chat) }}</span>
-          <el-button
-            class="delete-btn"
-            :icon="Delete"
-            link
-            @click.stop="handleDelete(chat.conversationId)"
-          />
-        </div>
+  <!-- 展开状态 -->
+  <el-menu
+    class="history-menu"
+    :collapse="isCollapsed"
+    :default-active="chatStore.conversationId || ''"
+    @select="handleSelect"
+  >
+    <el-menu-item-group class="history-item-group" v-if="!isCollapsed">
+      <template #title>
+        <el-icon><Clock /></el-icon>
+        <span class="history-title">历史会话</span>
+      </template>
+      <template v-if="currentModeHistory.length">
+        <el-menu-item 
+          v-for="chat in currentModeHistory" 
+          :key="chat.conversationId"
+          :index="chat.conversationId"
+          class="history-item"
+        >
+          <div class="history-item-content">
+            <span class="history-item-title">{{ formatChatTitle(chat) }}</span>
+            <el-button
+              class="delete-btn"
+              :icon="Delete"
+              link
+              @click.stop="handleDelete(chat.conversationId)"
+            />
+          </div>
+        </el-menu-item>
+      </template>
+      <el-menu-item v-else disabled class="history-empty">
+        <span class="mode-name">暂无历史会话</span>
       </el-menu-item>
-    </template>
-    <el-menu-item v-else disabled class="history-empty">
-      <span class="mode-name">暂无历史会话</span>
-    </el-menu-item>
-  </el-menu-item-group>
+    </el-menu-item-group>
+
+    <!-- 折叠状态 -->
+    <el-sub-menu v-else index="history" class="history-collapsed" popper-class="history-popper">
+      <template #title>
+        <el-icon><Clock /></el-icon>
+      </template>
+      <template v-if="currentModeHistory.length">
+        <el-menu-item 
+          v-for="chat in currentModeHistory" 
+          :key="chat.conversationId"
+          :index="chat.conversationId"
+          class="history-collapsed-item"
+          :title="formatChatTitle(chat)"
+        >
+          <template #title>{{ formatChatTitle(chat) }}</template>
+        </el-menu-item>
+      </template>
+      <el-menu-item v-else disabled class="history-collapsed-empty">
+        <el-icon><InfoFilled /></el-icon>
+        <template #title>暂无历史会话</template>
+      </el-menu-item>
+    </el-sub-menu>
+  </el-menu>
 </template>
 
 <script setup>
 import { computed } from 'vue'
 import { useChatStore } from '@/store/chat'
 import { useSettingsStore } from '@/store/settings'
-import { Clock, Delete } from '@element-plus/icons-vue'
+import { Clock, Delete, InfoFilled } from '@element-plus/icons-vue'
 import { ElMessageBox } from 'element-plus'
 
 const chatStore = useChatStore()
@@ -52,6 +82,12 @@ const formatChatTitle = (chat) => {
   return `会话 ${chat.conversationId.substring(0, 8)}`
 }
 
+const handleSelect = (conversationId) => {
+  if (conversationId !== 'history') {
+    chatStore.switchConversation(conversationId)
+  }
+}
+
 const handleDelete = async (conversationId) => {
   try {
     await ElMessageBox.confirm(
@@ -72,9 +108,13 @@ const handleDelete = async (conversationId) => {
 </script>
 
 <style lang="scss" scoped>
+.history-menu {
+  background: transparent;
+  border: none;
+  padding: 8px;
+}
+
 .history-item-group {
-  margin-top: 16px;
-  
   :deep(.el-menu-item-group__title) {
     padding: 8px 12px !important;
     font-size: 14px;
@@ -82,18 +122,21 @@ const handleDelete = async (conversationId) => {
     color: var(--el-text-color-regular);
     display: flex;
     align-items: center;
-    gap: 8px;
     line-height: 20px;
     
     .el-icon {
-      font-size: 16px;
-      margin-right: 2px;
+      font-size: 18px;
     }
   }
 
   :deep(.el-menu-item-group__content) {
     padding-left: 12px;
   }
+  .history-title {
+    margin-left: 12px;
+    font-weight: bold;
+    color: var(--el-text-color-regular);
+  }
 }
 
 .history-item {
@@ -102,7 +145,7 @@ const handleDelete = async (conversationId) => {
   color: var(--el-text-color-regular);
   border-radius: 8px;
   margin-bottom: 4px;
-  margin-left: 24px;
+  margin-left: 12px;
   padding: 0 12px !important;
   overflow: hidden;
   transition: all 0.3s ease;
@@ -118,7 +161,7 @@ const handleDelete = async (conversationId) => {
   }
 }
 
-.history-content {
+.history-item-content {
   display: flex;
   align-items: center;
   justify-content: space-between;
@@ -128,7 +171,7 @@ const handleDelete = async (conversationId) => {
   min-width: 0;
 }
 
-.history-title {
+.history-item-title {
   flex: 1;
   white-space: nowrap;
   overflow: hidden;
@@ -147,13 +190,12 @@ const handleDelete = async (conversationId) => {
   height: 24px;
   width: 24px;
   padding: 0;
-  color: var(--el-text-color-secondary);
+  color: var(--el-text-color-regular);
   flex-shrink: 0;
   border-radius: 4px;
   
   &:hover {
     color: var(--el-color-danger);
-    background-color: var(--el-color-danger-light-9);
   }
   
   :deep(.el-icon) {
@@ -164,12 +206,16 @@ const handleDelete = async (conversationId) => {
 .history-item:hover .delete-btn {
   opacity: 1;
   transform: translateX(0);
+  color: var(--el-color-regular);
+  &:hover {
+    color: var(--el-color-danger);
+  }
 }
 
 .history-empty {
   opacity: 0.6;
   cursor: not-allowed;
-  color: var(--el-text-color-secondary);
+  color: var(--el-text-color-regular);
   font-size: 14px;
   padding: 0 12px !important;
   margin-right: 12px;
@@ -177,9 +223,61 @@ const handleDelete = async (conversationId) => {
   line-height: 44px !important;
 }
 
+// 折叠状态样式
+.history-collapsed {
+  :deep(.el-sub-menu__title) {
+    height: 40px;
+    line-height: 40px;
+    padding: 0 12px !important;
+    
+    .el-icon {
+      font-size: 16px;
+    }
+  }
+}
+.history-popper {
+    border-radius: 8px;
+}
+.history-collapsed-item {
+  height: 40px !important;
+  line-height: 40px !important;
+  padding: 0 12px !important;
+  margin: 8px 12px;
+  border-radius: 8px;
+  color: var(--el-text-color-regular);
+  transition: all 0.3s ease;
+
+  &:hover {
+    background-color: var(--el-fill-color-light);
+    color: var(--el-color-primary);
+  }
+
+  &.is-active {
+    background-image: linear-gradient(135deg, var(--el-color-primary) 0%, var(--el-color-primary-light-3) 100%);
+    color: var(--el-color-white);
+    box-shadow: 0 4px 8px rgba(0, 0, 0, 0.2);
+
+    .el-icon {
+      color: var(--el-color-white);
+    }
+  }
+}
+
+.history-collapsed-empty {
+  @extend .history-collapsed-item;
+  opacity: 0.6;
+  cursor: not-allowed;
+  color: var(--el-text-color-secondary);
+
+  &:hover {
+    background-color: transparent;
+    color: var(--el-text-color-secondary);
+  }
+}
+
 // 暗黑模式适配
 :deep(html.dark) {
-  .history-item {
+  .history-collapsed-item {
     &:hover {
       background-color: var(--el-fill-color-darker);
     }
@@ -189,9 +287,5 @@ const handleDelete = async (conversationId) => {
       color: var(--el-color-white);
     }
   }
-  
-  .delete-btn:hover {
-    background-color: rgba(var(--el-color-danger-rgb), 0.2);
-  }
 }
 </style> 
\ No newline at end of file
diff --git a/src/store/chat.js b/src/store/chat.js
index b7e8fc2..b4ac1fb 100644
--- a/src/store/chat.js
+++ b/src/store/chat.js
@@ -301,9 +301,9 @@ export const useChatStore = defineStore('chat', {
 
     startNewChat() {
       // 如果当前有活跃会话，将其标记为完成
-      if (this.conversationId && this.messages[this.conversationId]) {
-        this.messages[this.conversationId].conversationStatus = 'finished'
-      }
+      // if (this.conversationId && this.messages[this.conversationId]) {
+      //   this.messages[this.conversationId].conversationStatus = 'finished'
+      // }
       
       // 只清除当前会话相关的消息缓存
       if (this.conversationId) {
diff --git a/src/views/chat/ChatInterface.vue b/src/views/chat/ChatInterface.vue
index 2ca14ac..82259ab 100644
--- a/src/views/chat/ChatInterface.vue
+++ b/src/views/chat/ChatInterface.vue
@@ -73,13 +73,6 @@
       </div>
     </div>
     <div class="input-area">
-      <el-button 
-        class="new-chat-btn" 
-        @click="chatStore.startNewChat" 
-        :disabled="newChatButtonsDisabled"
-      >
-        新会话
-      </el-button>
       <el-input
         v-model="messageInput"
         type="textarea"
@@ -153,12 +146,6 @@ const sendButtonsDisabled = computed(() => {
   if (!currentConversation.conversationStatus) return false
   return ['finished', 'typing'].includes(currentConversation.conversationStatus)
 })
-const newChatButtonsDisabled = computed(() => {
-  if (!chatStore.currentConversation) return false
-  const currentConversation = chatStore.currentConversation
-  if (!currentConversation.conversationStatus) return false
-  return ['typing'].includes(currentConversation.conversationStatus)
-})
 
 // 获取最后一条包含dafen字段的消息
 const lastMessageWithDafen = computed(() => {
@@ -684,52 +671,40 @@ html.dark .background-section .background-content {
 }
 
 .input-area {
-  position: absolute;
-  bottom: 0;
-  left: 0;
-  right: 0;
   display: flex;
   align-items: flex-end;
-  gap: 12px;
-  padding: 16px;
-  background: var(--el-color-primary-light-8);
+  gap: 8px;
+  padding: 16px 20px;
   border-top: 1px solid var(--el-border-color-light);
-  z-index: 3;
-  :deep(.el-textarea) {
+  background-color: var(--el-bg-color);
+  position: relative;
+  z-index: 1;
+
+  .el-textarea {
     flex: 1;
-
-    .el-textarea__inner {
-      min-height: 40px !important;
-      padding: 8px 12px;
-      font-size: 14px;
-      line-height: 1.5;
-      border-radius: 4px;
-      border-color: var(--el-border-color);
-      background-color: var(--el-bg-color);
-      transition: all 0.3s;
+    
+    :deep(.el-textarea__inner) {
+      border-radius: 8px;
       resize: none;
-
-      &:hover {
-        border-color: var(--el-border-color-hover);
-      }
-
-      &:focus {
-        border-color: var(--el-color-primary);
-        box-shadow: 0 0 0 2px var(--el-color-primary-light-8);
-      }
-
+      padding: 8px 12px;
+      min-height: 40px !important;
+      max-height: 120px;
+      line-height: 24px;
+      font-size: 14px;
+      
       &:disabled {
-        background-color: var(--el-fill-color-light);
-        border-color: var(--el-border-color-lighter);
-        color: var(--el-text-color-placeholder);
+        background-color: var(--el-input-disabled-bg);
         cursor: not-allowed;
       }
-
-      &::placeholder {
-        color: var(--el-text-color-placeholder);
-      }
     }
   }
+
+  .send-btn {
+    height: 40px;
+    padding: 0 20px;
+    border-radius: 8px;
+    font-size: 14px;
+  }
 }
 
 // Dark mode override for input area
diff --git a/src/views/chat/ChatModeSelector.vue b/src/views/chat/ChatModeSelector.vue
index cd6ba02..99bbef9 100644
--- a/src/views/chat/ChatModeSelector.vue
+++ b/src/views/chat/ChatModeSelector.vue
@@ -23,14 +23,19 @@
         :collapse="settingsStore.sidebarCollapsed"
         @select="selectMode"
       >
+        <el-menu-item class="mode-item new-chat-item" @click="handleNewChat">
+          <el-icon><Plus /></el-icon>
+          <span class="mode-name">新建会话</span>
+        </el-menu-item>
+
         <el-menu-item v-for="mode in chatModes" :key="mode.id" :index="mode.id" class="mode-item">
           <el-icon><component :is="mode.icon" /></el-icon>
           <span class="mode-name">{{ mode.name }}</span>
         </el-menu-item>
 
-        <HistoryList />
+       
       </el-menu>
-
+      <HistoryList />
       <!-- Settings Button Popover -->
       <el-popover
         placement="top-end"
@@ -57,7 +62,7 @@
 import { useChatStore } from '@/store/chat'
 import { useSettingsStore } from '@/store/settings'
 import { computed, ref, onMounted, onUnmounted } from 'vue'
-import { ChatDotRound, ChatLineRound, ChatRound, Service, Setting, Clock, Delete } from '@element-plus/icons-vue'
+import { ChatDotRound, ChatLineRound, ChatRound, Service, Setting, Clock, Delete, Plus } from '@element-plus/icons-vue'
 import { ElMenu, ElMenuItem, ElIcon, ElPopover, ElMessageBox } from 'element-plus'
 import SettingsPanel from '@/components/settings/SettingsPanel.vue'
 import HistoryList from '@/components/chat/HistoryList.vue'
@@ -116,6 +121,10 @@ const selectMode = (id) => {
   }
 }
 
+const handleNewChat = () => {
+  chatStore.startNewChat()
+}
+
 const isMobile = ref(false)
 
 const checkMobile = () => {
@@ -162,6 +171,7 @@ onUnmounted(() => {
   padding: 0 16px;
   display: flex;
   align-items: center;
+  flex-shrink: 0;
   
   &-title {
     display: flex;
@@ -186,8 +196,18 @@ onUnmounted(() => {
   background-color: transparent;
   border: none;
   padding: 8px;
-  flex-grow: 1;
-  overflow-y: auto;
+  overflow: visible;
+}
+
+.new-chat-item {
+  margin-bottom: 12px !important;
+  border: 1px solid var(--el-border-color-lighter);
+  background-color: var(--el-fill-color-light) !important;
+
+  &:hover {
+    box-shadow: var(--el-box-shadow-light);
+    color: var(--el-color-primary);
+  }
 }
 
 :deep(.mode-item) {
@@ -200,7 +220,7 @@ onUnmounted(() => {
   overflow: hidden;
 
   .el-icon {
-    margin-right: 12px;
+    margin: 0;
     font-size: 18px;
     width: 18px;
   }
@@ -216,11 +236,12 @@ onUnmounted(() => {
   }
   
   &:not(.is-active):hover {
-    background-color: var(--el-color-primary-light-9);
+    background-color: var(--el-fill-color-light);
     color: var(--el-color-primary);
   }
   
   .mode-name {
+    margin-left: 12px;
     font-size: 14px;
     white-space: nowrap;
     opacity: 1;
@@ -232,16 +253,98 @@ onUnmounted(() => {
   }
 }
 
-.mode-setting-btn {
-  position: absolute;
-  right: 8px;
-  top: 50%;
-  transform: translateY(-50%);
-  color: var(--el-text-color-secondary);
+.mode-selector.collapsed {
+  .mode-header {
+    padding: 0;
+    display: flex;
+    align-items: center;
+    justify-content: center;
+    height: 60px;
+    
+    .mode-header-collapsed-logo {
+      display: flex;
+      align-items: center;
+      height: 100%;
+    }
+
+    .mode-header-icon.collapsed {
+      height: 32px;
+      filter: drop-shadow(0 0 0.75em rgba(var(--el-color-primary-rgb), 0.6));
+      vertical-align: middle;
+    }
+  }
   
+  .mode-menu {
+    padding: 8px 12px;
+  }
+
+  :deep(.el-menu-item) {
+    width: 40px;
+    height: 40px;
+    padding: 0 !important;
+    display: flex;
+    align-items: center;
+    justify-content: center;
+    margin: 0 auto 4px auto;
+
+    .el-icon {
+      margin-right: 0;
+    }
+
+    .mode-name {
+      display: none;
+    }
+  }
+
+  .settings-button {
+    width: 40px;
+    height: 40px;
+    .mode-name,
+    .button-text {
+      opacity: 0;
+    }
+  }
+}
+
+.sidebar-footer {
+  height: 48px;
+  padding: 0 12px;
+  display: flex;
+  align-items: center;
+  justify-content: center;
+  margin-top: auto;
+  flex-shrink: 0;
+}
+
+.settings-button {
+  display: flex;
+  align-items: center;
+  height: 40px;
+  width: 100%;
+  padding: 0 12px;
+  color: var(--el-text-color-regular);
+  border-radius: 8px;
+  cursor: pointer;
+  transition: background-color 0.2s ease-in-out, color 0.2s ease-in-out;
+
+  .el-icon {
+    margin: 0;
+    font-size: 18px;
+    width: 18px;
+  }
+
   &:hover {
+    background-color: var(--el-fill-color-light);
     color: var(--el-color-primary);
   }
+
+  .button-text {
+    margin-left: 12px;
+    font-size: 14px;
+    white-space: nowrap;
+    opacity: 1;
+    transition: opacity 0.3s ease-in-out;
+  }
 }
 
 /* 移动端样式 */
@@ -307,7 +410,7 @@ onUnmounted(() => {
     margin: 0 auto 4px auto;
 
     .el-icon {
-      margin-right: 0;
+      margin: 0;
     }
 
     .mode-name {
@@ -325,95 +428,6 @@ onUnmounted(() => {
   }
 }
 
-.sidebar-footer {
-  height: 48px;
-  padding: 0 12px;
-  display: flex;
-  align-items: center;
-  justify-content: center;
-}
-
-.settings-button {
-  display: flex;
-  align-items: center;
-  height: 40px;
-  width: 100%;
-  padding: 0 12px;
-  color: var(--el-text-color-regular);
-  border-radius: 8px;
-  cursor: pointer;
-  transition: background-color 0.2s ease-in-out, color 0.2s ease-in-out;
-
-  .el-icon {
-    margin-right: 12px;
-    font-size: 18px;
-    width: 18px;
-  }
-
-  &:hover {
-    background-color: var(--el-fill-color-light);
-    color: var(--el-color-primary);
-  }
-
-  .button-text {
-    font-size: 14px;
-    white-space: nowrap;
-    opacity: 1;
-    transition: opacity 0.3s ease-in-out;
-  }
-}
-
-.mode-selector.collapsed {
-  .sidebar-footer {
-    padding: 0;
-  }
-
-  .settings-button {
-    justify-content: center;
-    width: 40px;
-    padding: 0;
-
-    .el-icon {
-      margin-right: 0;
-    }
-
-    .button-text {
-      opacity: 0;
-      pointer-events: none;
-    }
-    
-    &:hover {
-      background-color: var(--el-fill-color-light);
-    }
-  }
-}
-</style>
-
-<style lang="scss">
-.settings-popover-popper {
-  min-width: 350px !important;
-  padding: 0 !important;
-  border: none !important;
-  box-shadow: var(--el-box-shadow-light);
-  border-radius: 8px;
-}
-</style>
-
-<style lang="scss">
-/* Dark mode override */
-html.dark .mode-selector {
-    background-color: var(--el-color-primary-dark-2);
-    border-right-color: var(--el-border-color-dark);
-  
-  /* Dark mode hover */
-  .mode-menu :deep(.el-menu-item):not(.is-active):hover {
-      background-color: var(--el-fill-color);
-      color: var(--el-color-primary);
-  }
-}
-</style>
-
-<style lang="scss" scoped>
 .history-content {
   display: flex;
   align-items: center;
@@ -466,4 +480,28 @@ html.dark .mode-selector {
   opacity: 0.6;
   cursor: not-allowed;
 }
+</style>
+
+<style lang="scss">
+.settings-popover-popper {
+  min-width: 350px !important;
+  padding: 0 !important;
+  border: none !important;
+  box-shadow: var(--el-box-shadow-light);
+  border-radius: 8px;
+}
+</style>
+
+<style lang="scss">
+/* Dark mode override */
+html.dark .mode-selector {
+    background-color: var(--el-color-primary-dark-2);
+    border-right-color: var(--el-border-color-dark);
+  
+  /* Dark mode hover */
+  .mode-menu :deep(.el-menu-item):not(.is-active):hover {
+      background-color: var(--el-fill-color);
+      color: var(--el-color-primary);
+  }
+}
 </style> 
\ No newline at end of file