diff --git a/src/renderer/views/home/ChatHistory.vue b/src/renderer/views/home/ChatHistory.vue
index 9f47b93..d21a648 100644
--- a/src/renderer/views/home/ChatHistory.vue
+++ b/src/renderer/views/home/ChatHistory.vue
@@ -1,29 +1,28 @@
 <template>
-	<aside class="w-64 h-screen box-border flex flex-col">
-		<header class="flex items-center justify-between mb-3">
-			<div class="flex items-center gap-2">
-				<img class="w-20 h-20 rounded-md object-cover" src="@assets/images/login/white_logo.png" />
-				<div class="font-bold text-gray-800">YINIAN</div>
-			</div>
-		</header>
-
-		<div class="mb-3 pl-4 pr-4">
-			<button class="bg-white rounded-lg px-3 py-2 border shadow-sm w-full text-center">＋ 新对话</button>
+	<aside class="w-50 h-screen box-border flex flex-col">
+		<div class="flex items-center m-2">
+			<img class="w-10 h-10 rounded-md" src="@assets/images/login/white_logo.png" />
+			<div class="font-bold text-gray-80">YINIAN</div>
 		</div>
 
-		<div class="overflow-y-auto p-4">
-			<section v-for="group in groups" :key="group.title" class="mb-3">
-				<div class="flex items-center justify-between text-sm text-gray-500 py-2">
+		<div class="flex justify-center m-2 bg-white rounded-lg p-2.5 border-[##E5E8EE] shadow-sm text-center" @click="addNewChat">
+			<RiAddLine /> 新对话
+		</div>
+
+		<div class="overflow-y-auto p-2 ">
+			<section v-for="(group, index) in groups" :key="group.title" class="mb-3">
+				<div class="flex items-center justify-between text-sm text-gray-500" @click="selectGroupKey(index)">
 					<span>{{ group.title }}</span>
-					<RiArrowDownSLine />
+					<RiArrowDownSLine v-show="group.selected" color="rgba(153,160,174,1)" />
+					<RiArrowRightSLine v-show="!group.selected" color="rgba(153,160,174,1)" />
 				</div>
 
-				<ul class="list-none p-1 mr-4">
-					<li v-for="item in group.items" :key="item.id" @click="select(item.id)" :class="[
+				<ul class="list-none mt-1.5" v-if="group.selected">
+					<li v-for="item in group.items" :key="item.id" @click="selectedHistoryMessage(item.id)" :class="[
 						'flex items-center gap-2 p-2 text-gray-600 rounded-lg cursor-pointer transition-colors',
-						item.id === selectedId ? 'bg-white shadow-md border border-gray-200' : 'hover:bg-gray-50'
+						item.id === selectedId ? 'bg-white shadow-sm border-[##E5E8EE]' : 'hover:bg-gray-50'
 					]">
-						<span class="w-2 h-2 rounded-full bg-sky-200 flex-none"></span>
+						<span class="w-2 h-2 rounded-full bg-[#BEDBFF] flex-none"></span>
 						<div class="flex-1 min-w-0">
 							<div class="truncate text-sm">{{ item.title }}</div>
 						</div>
@@ -38,13 +37,16 @@
 
 <script setup lang="ts">
 import { ref } from 'vue'
-import { RiArrowDownSLine } from '@remixicon/vue'
+import { RiAddLine, RiArrowRightSLine, RiArrowDownSLine } from '@remixicon/vue'
 
+/// 记录选择的历史消息ID
 const selectedId = ref<number | null>(2)
 
+/// 历史消息分组数据
 const groups = ref([
 	{
 		title: '近3天',
+		selected: false,
 		items: [
 			{ id: 1, title: '这是一段对话' },
 			{ id: 2, title: '这是一段对话' },
@@ -55,6 +57,7 @@ const groups = ref([
 	},
 	{
 		title: '近7天',
+		selected: false,
 		items: [
 			{ id: 6, title: '这是一段对话' },
 			{ id: 7, title: '这是一段对话' },
@@ -64,6 +67,7 @@ const groups = ref([
 	},
 	{
 		title: '近15天',
+		selected: false,
 		items: [
 			{ id: 10, title: '这是一段对话' },
 			{ id: 11, title: '这是一段对话' },
@@ -74,6 +78,7 @@ const groups = ref([
 	},
 	{
 		title: '近30天',
+		selected: false,
 		items: [
 			{ id: 15, title: '这是一段对话' },
 			{ id: 16, title: '这是一段对话' },
@@ -83,6 +88,7 @@ const groups = ref([
 	},
 	{
 		title: '近60天',
+		selected: false,
 		items: [
 			{ id: 19, title: '这是一段对话' },
 			{ id: 20, title: '这是一段对话' },
@@ -93,6 +99,7 @@ const groups = ref([
 	},
 	{
 		title: '近90天',
+		selected: false,
 		items: [
 			{ id: 24, title: '这是一段对话' },
 			{ id: 25, title: '这是一段对话' },
@@ -102,7 +109,23 @@ const groups = ref([
 	}
 ])
 
-function select(id: number) {
+/// 选择历史消息
+const selectedHistoryMessage = (id: number) => {
 	selectedId.value = id
 }
+
+/// 选择分组展开/收起
+const selectGroupKey = (index: number) => {
+	groups.value.forEach((group, i) => {
+		if (i === index) {
+			group.selected = !group.selected
+		}
+	})
+}
+
+/// TODO: 添加新对话
+const addNewChat = () => {
+	console.log('add new chat')
+}
+
 </script>