diff --git a/static/css/common.css b/static/css/common.css
index f64ee02..e40021a 100644
--- a/static/css/common.css
+++ b/static/css/common.css
@@ -167,7 +167,7 @@
 }
 .chatCenter {
     background: #fff;
-    max-width: 840px;
+    /* max-width: 840px; */
     margin: 0 auto;
     box-shadow: 2px 2px 6px rgba(0,0,0,.3);
     border-top: none;
@@ -190,7 +190,7 @@
     overflow-y: auto;
 }
 .chatVisitorPage .chatBox{
-    padding: 5px 4px;
+    padding: 5px 14px;
 }
 .chatBox .el-col{margin:10px 0;}
 .chatUser{
@@ -203,6 +203,12 @@
 .chatMainPage{
     margin-top: 1px;
 }
+.kefuMe{
+    padding-left: 10px;
+}
+.chatMsgContent{
+    padding-right: 10px;
+}
 .chatContent {
     background-color: rgb(255,255,255);
     color: #000;
@@ -217,8 +223,8 @@
     font-size: 14px;
 }
 .chatContent2 {
-    border-radius: 8px 8px 8px 0px;
-    padding: 10px 15px;
+    border-radius: 3px;
+    padding: 6px 15px;
 }
 .chatBoxMe{
     margin-top: 10px;
@@ -249,6 +255,9 @@ a{color: #07a9fe;text-decoration: none;}
     z-index: 99;
     border-top: 1px solid #e4e4e4;
 }
+.el-button--primary{
+    border-radius: 5px;
+}
 .chatBoxSendBtn{float: right;margin: 12px 4px 0 0;}
 .footContact{text-align: center;
     position: absolute;
@@ -350,7 +359,8 @@ a{color: #07a9fe;text-decoration: none;}
     overflow: hidden;
     background-color: rgb(11 113 236);
     background-image: url(../images/visitor_title_bg.png);
-    background-size: auto 72px;
+    background-repeat: no-repeat;
+    background-size: 100% 72px;
     background-position: center 0;
     align-items: center;
 }
@@ -367,6 +377,7 @@ a{color: #07a9fe;text-decoration: none;}
     position: relative;
 }
 .chatArticle{
+    height: 100%;
     display: none;
 }
 .visitorIconBox{
@@ -403,7 +414,7 @@ a{color: #07a9fe;text-decoration: none;}
 }
 @media screen and (min-width: 900px) {
     .chatCenter {
-        max-height: 650px;
+        /* max-height: 650px; */
         box-shadow: 0 2px 8px rgba(0,0,0,.15);
         border-radius: 8px;
     }
@@ -424,7 +435,7 @@ a{color: #07a9fe;text-decoration: none;}
     .chatEntBox {
         width: calc(100% - 265px);
         float: left;
-        border-right: 1px solid #e6e6e6;
+        /* border-right: 1px solid #e6e6e6; */
     }
     .chatArticle {
         display: block;
@@ -444,19 +455,32 @@ a{color: #07a9fe;text-decoration: none;}
         color: rgb(250, 84, 28);
     }
 }
+.message-box-send{
+    display: flex;
+    gap: 10px;
+}
+.message-box-send .btn-box{
+    display: flex;
+    align-items: end;
+    padding-right: 10px;
+
+}
+.message-box-send .el-textarea__inner{
+    background-color: rgba(0, 0, 0, 0.1);
+    color: #000;
+}
 .visitorEditorArea{
-    width: 80%;
+    margin-top: 5px;
+    padding-left: 8px;
 }
 .visitorEditorArea  textarea {
     padding: 7px 0 7px 8px;
-    font-size:16px;
-    line-height: 21px;
+    font-size:14px;
+    line-height: 15px;
     border: none;
 }
 .visitorEditorBtn{
-    position: absolute;
-    right: 10px;
-    bottom: 2px;
+    padding: 8px 20px;
 }
 .mainLeftMenu {
     width: 70px;
@@ -532,7 +556,13 @@ a{color: #07a9fe;text-decoration: none;}
     line-height: 23px;
     color: #666;
 }
+.el-textarea{
+
+    /* padding: 5px 10px ; */
+
+}
 .chatArea .el-textarea__inner{
+    
     border: none;
 }
 .tongji{
diff --git a/static/css/dark-mode.css b/static/css/dark-mode.css
new file mode 100644
index 0000000..1b83bde
--- /dev/null
+++ b/static/css/dark-mode.css
@@ -0,0 +1,216 @@
+/* Dark Mode Styles for Customer Service Chat - Deep Green Theme */
+
+/* 暗色模式下的背景和文字颜色 */
+body.dark-mode {
+    background-color: #1a3d35 !important;
+    color: #FFFFFF !important;
+}
+
+body.dark-mode .visitorBody {
+    /* background-color: #1E3838 !important; */
+}
+
+/* 聊天容器 */
+body.dark-mode .chatCenter {
+    
+    background-color: #1a3d35 !important;
+    /* background-color: red !important; */
+}
+
+/* 聊天标题区域 */
+body.dark-mode .chatEntTitle {
+    background: linear-gradient(to right, #001E14 0%, #007C34 100%);
+    color: #FFFFFF !important;
+    border-bottom: 1px solid #355050 !important;
+}
+
+/* 聊天内容区域 */
+body.dark-mode .chatEntBox {
+    background-color: #1a3d35 !important;
+}
+
+body.dark-mode .chatVisitorPage {
+   background-color: #1a3d35 !important;
+}
+
+body.dark-mode .chatBox {
+    background-color: #1a3d35 !important;
+}
+
+/* 聊天消息气泡 - 客服消息 */
+body.dark-mode .chatContent {
+    background-color: #2D5050 !important;
+    color: #FFFFFF !important;
+    border: 1px solid #355858 !important;
+}
+
+/* 聊天消息气泡 - 访客消息 */
+body.dark-mode .chatBoxMe .chatContent {
+    background-color: #246153 !important;
+    color: #FFFFFF !important;
+    border: 1px solid #246153 !important;
+}
+
+/* 时间戳 */
+body.dark-mode .chatTime {
+    color: #A0BFBF !important;
+}
+
+body.dark-mode .chatTime span {
+    background-color: #2A4848 !important;
+    color: #A0BFBF !important;
+}
+
+/* 通知消息 */
+body.dark-mode .chatNotice {
+    /* background-color: #2D4A4A !important; */
+}
+
+body.dark-mode .chatNoticeContent {
+    color: #fff !important;
+    background-color: #2D5050;
+}
+
+
+/* 输入框区域 */
+body.dark-mode .chatBoxSend {
+    background-color: #065946 !important;
+    border-top: 1px solid #355050 !important;
+}
+
+/* Element UI 输入框暗色模式 */
+body.dark-mode .el-textarea__inner {
+    background-color: rgba(0,0,0,0.2) !important;
+    border-color: #fff !important;
+    color: #FFFFFF !important;
+}
+
+body.dark-mode .el-textarea__inner:focus {
+    border-color: #507070 !important;
+}
+
+body.dark-mode .el-textarea__inner::placeholder {
+    color: #7A9999 !important;
+}
+
+/* 图标按钮 */
+body.dark-mode .iconBtn {
+    color: #FFFFFF !important;
+}
+
+body.dark-mode .iconBtn:hover {
+    color: #FFB84D !important;
+}
+
+body.dark-mode .visitorIconBtns {
+    color: #FFFFFF !important;
+}
+
+body.dark-mode .visitorIconBtns:hover {
+    color: #FFB84D !important;
+}
+
+/* 表情面板 */
+body.dark-mode .faceBox {
+    background-color: #2A4848 !important;
+    border: 1px solid #355050 !important;
+}
+
+body.dark-mode .faceBoxList li {
+    border-color: #355050 !important;
+    background-color: #1E3838 !important;
+}
+
+body.dark-mode .faceBoxList li:hover {
+    background-color: #355050 !important;
+}
+
+/* 公告区域 */
+body.dark-mode .chatArticle {
+    background-color: #27463f !important;
+    border-top: 1px solid #355050 !important;
+}
+
+body.dark-mode .hotQuestionTitle {
+    color: #FFFFFF !important;
+    border-bottom: 1px solid #355050 !important;
+}
+
+body.dark-mode .allNotice {
+    color: #A0BFBF !important;
+}
+
+/* Element UI 组件暗色模式 */
+body.dark-mode .el-button--primary {
+    background-color: #ffc800 !important;
+    border-color: #ffc800 !important;
+    color: #000;
+}
+
+body.dark-mode .el-button--primary:hover {
+    background-color: #ffc800 !important;
+}
+
+body.dark-mode .el-button--primary.is-disabled {
+    opacity: 0.5;
+    color: #000 !important;
+}
+
+/* 链接 */
+body.dark-mode a {
+    color: #FFB84D !important;
+}
+
+body.dark-mode a:hover {
+    color: #FFC870 !important;
+}
+
+/* 滚动条 */
+body.dark-mode ::-webkit-scrollbar {
+    width: 8px;
+    height: 8px;
+}
+
+body.dark-mode ::-webkit-scrollbar-track {
+    background-color: #1E3838;
+}
+
+body.dark-mode ::-webkit-scrollbar-thumb {
+    background-color: #355050;
+    border-radius: 4px;
+}
+
+body.dark-mode ::-webkit-scrollbar-thumb:hover {
+    background-color: #406060;
+}
+
+/* Badge */
+body.dark-mode .el-badge__content {
+    background-color: #FFB84D !important;
+}
+
+/* Message 组件 */
+body.dark-mode .el-message {
+    background-color: #2A4848 !important;
+    border-color: #355050 !important;
+    color: #FFFFFF !important;
+}
+
+body.dark-mode .el-message--warning {
+    background-color: #6A5A3A !important;
+    border-color: #8A7A5A !important;
+}
+
+/* Tooltip */
+body.dark-mode .el-tooltip__popper {
+    background-color: #2A4848 !important;
+    color: #FFFFFF !important;
+}
+
+body.dark-mode .el-tooltip__popper[x-placement^=top] .popper__arrow {
+    border-top-color: #2A4848 !important;
+}
+
+body.dark-mode .el-tooltip__popper[x-placement^=bottom] .popper__arrow {
+    border-bottom-color: #2A4848 !important;
+}
diff --git a/static/css/dark-mode.css.backup b/static/css/dark-mode.css.backup
new file mode 100644
index 0000000..8582e19
--- /dev/null
+++ b/static/css/dark-mode.css.backup
@@ -0,0 +1,212 @@
+/* Dark Mode Styles for Customer Service Chat */
+
+/* 暗色模式下的背景和文字颜色 */
+body.dark-mode {
+    /* background-color: #1a1a1a !important; */
+    color: #e0e0e0 !important;
+}
+
+body.dark-mode .visitorBody {
+    background-color: #1a1a1a !important;
+}
+
+/* 聊天容器 */
+body.dark-mode .chatCenter {
+    /* background-color: #1a1a1a !important; */
+}
+
+/* 聊天标题区域 */
+body.dark-mode .chatEntTitle {
+    background-color: #2d2d2d !important;
+    color: #e0e0e0 !important;
+    border-bottom: 1px solid #3d3d3d !important;
+}
+
+/* 聊天内容区域 */
+body.dark-mode .chatEntBox {
+    /* background-color: #1a1a1a !important; */
+}
+
+body.dark-mode .chatVisitorPage {
+    /* background-color: #1a1a1a !important; */
+}
+
+body.dark-mode .chatBox {
+    /* background-color: #1a1a1a !important; */
+}
+
+/* 聊天消息气泡 - 客服消息 */
+body.dark-mode .chatContent {
+    background-color: #2d2d2d !important;
+    color: #e0e0e0 !important;
+    border: 1px solid #3d3d3d !important;
+}
+
+/* 聊天消息气泡 - 访客消息 */
+body.dark-mode .chatBoxMe .chatContent {
+    background-color: #1e5a8e !important;
+    color: #ffffff !important;
+    border: 1px solid #2d7ab8 !important;
+}
+
+/* 时间戳 */
+body.dark-mode .chatTime {
+    color: #888888 !important;
+}
+
+body.dark-mode .chatTime span {
+    background-color: #2d2d2d !important;
+    color: #888888 !important;
+}
+
+/* 通知消息 */
+body.dark-mode .chatNotice {
+    /* background-color: #2d2d2d !important; */
+}
+
+body.dark-mode .chatNoticeContent {
+    color: #4a9eff !important;
+}
+
+/* 输入框区域 */
+body.dark-mode .chatBoxSend {
+    background-color: #2d2d2d !important;
+    border-top: 1px solid #3d3d3d !important;
+}
+
+/* Element UI 输入框暗色模式 */
+body.dark-mode .el-textarea__inner {
+    background-color: #1a1a1a !important;
+    border-color: #3d3d3d !important;
+    color: #e0e0e0 !important;
+}
+
+body.dark-mode .el-textarea__inner:focus {
+    border-color: #4a9eff !important;
+}
+
+body.dark-mode .el-textarea__inner::placeholder {
+    color: #666666 !important;
+}
+
+/* 图标按钮 */
+body.dark-mode .iconBtn {
+    color: #b0b0b0 !important;
+}
+
+body.dark-mode .iconBtn:hover {
+    color: #4a9eff !important;
+}
+
+body.dark-mode .visitorIconBtns {
+    color: #b0b0b0 !important;
+}
+
+body.dark-mode .visitorIconBtns:hover {
+    color: #4a9eff !important;
+}
+
+/* 表情面板 */
+body.dark-mode .faceBox {
+    background-color: #2d2d2d !important;
+    border: 1px solid #3d3d3d !important;
+}
+
+body.dark-mode .faceBoxList li {
+    border-color: #3d3d3d !important;
+    background-color: #1a1a1a !important;
+}
+
+body.dark-mode .faceBoxList li:hover {
+    background-color: #3d3d3d !important;
+}
+
+/* 公告区域 */
+body.dark-mode .chatArticle {
+    background-color: #2d2d2d !important;
+    border-top: 1px solid #3d3d3d !important;
+}
+
+body.dark-mode .hotQuestionTitle {
+    color: #e0e0e0 !important;
+    border-bottom: 1px solid #3d3d3d !important;
+}
+
+body.dark-mode .allNotice {
+    color: #b0b0b0 !important;
+}
+
+/* Element UI 组件暗色模式 */
+body.dark-mode .el-button--primary {
+    background-color: #1e5a8e !important;
+    border-color: #2d7ab8 !important;
+}
+
+body.dark-mode .el-button--primary:hover {
+    background-color: #2d7ab8 !important;
+}
+
+body.dark-mode .el-button--primary.is-disabled {
+    background-color: #3d3d3d !important;
+    border-color: #3d3d3d !important;
+    color: #666666 !important;
+}
+
+/* 链接 */
+body.dark-mode a {
+    color: #4a9eff !important;
+}
+
+body.dark-mode a:hover {
+    color: #70b4ff !important;
+}
+
+/* 滚动条 */
+body.dark-mode ::-webkit-scrollbar {
+    width: 8px;
+    height: 8px;
+}
+
+body.dark-mode ::-webkit-scrollbar-track {
+    background-color: #1a1a1a;
+}
+
+body.dark-mode ::-webkit-scrollbar-thumb {
+    background-color: #3d3d3d;
+    border-radius: 4px;
+}
+
+body.dark-mode ::-webkit-scrollbar-thumb:hover {
+    background-color: #4d4d4d;
+}
+
+/* Badge */
+body.dark-mode .el-badge__content {
+    background-color: #4a9eff !important;
+}
+
+/* Message 组件 */
+body.dark-mode .el-message {
+    background-color: #2d2d2d !important;
+    border-color: #3d3d3d !important;
+    color: #e0e0e0 !important;
+}
+
+body.dark-mode .el-message--warning {
+    background-color: #5a4e1e !important;
+    border-color: #7a6e3e !important;
+}
+
+/* Tooltip */
+body.dark-mode .el-tooltip__popper {
+    background-color: #2d2d2d !important;
+    color: #e0e0e0 !important;
+}
+
+body.dark-mode .el-tooltip__popper[x-placement^=top] .popper__arrow {
+    border-top-color: #2d2d2d !important;
+}
+
+body.dark-mode .el-tooltip__popper[x-placement^=bottom] .popper__arrow {
+    border-bottom-color: #2d2d2d !important;
+}
diff --git a/static/templates/chat_page.html b/static/templates/chat_page.html
index 08e459d..c604aa8 100644
--- a/static/templates/chat_page.html
+++ b/static/templates/chat_page.html
@@ -5,6 +5,73 @@
     <meta name="keywords" content="Golang Open Source LiveChat Software"/>
     <meta name="description" content="Golang Open Source LiveChat Software"/>
     <title>Live Chat Support</title>
+
+    <!-- 防止闪烁：在页面渲染前应用主题 -->
+    <script>
+        (function() {
+            // 1. 从 URL 参数获取主题
+            const urlParams = new URLSearchParams(window.location.search);
+            const themeParam = urlParams.get('theme');
+
+            // 2. 从 localStorage 获取保存的主题
+            const savedTheme = localStorage.getItem('theme');
+
+            // 3. 检测是否在 iframe 中
+            const isInIframe = window.parent !== window;
+
+            // 4. 确定要使用的主题
+            // 如果在 iframe 中且没有明确指定主题，默认使用暗色模式（避免闪烁）
+            let theme;
+            if (themeParam) {
+                theme = themeParam;
+            } else if (savedTheme) {
+                theme = savedTheme;
+            } else if (isInIframe) {
+                // iframe 环境默认暗色，等待父页面发送实际主题
+                theme = 'dark';
+            } else {
+                theme = 'light';
+            }
+
+            // 5. 立即设置HTML背景色和应用主题类
+            if (theme === 'dark') {
+                // 暗色模式：立即设置内联样式防止闪烁
+                document.documentElement.style.backgroundColor = '#1a3d35';
+                document.documentElement.style.color = '#FFFFFF';
+                document.documentElement.classList.add('dark-mode-init');
+            } else {
+                // 白天模式：移除可能存在的暗色类和样式
+                document.documentElement.classList.remove('dark-mode-init');
+                document.documentElement.style.backgroundColor = '';
+                document.documentElement.style.color = '';
+            }
+
+            // 6. 在脚本末尾立即尝试给body添加类（此时body可能还不存在）
+            // 使用定时器快速重试，确保尽早添加
+            let retryCount = 0;
+            const maxRetries = 50; // 最多重试50次
+            const applyBodyClass = function() {
+                if (document.body) {
+                    if (theme === 'dark') {
+                        document.body.classList.add('dark-mode');
+                        // 移除html的内联样式，让CSS接管
+                        document.documentElement.style.backgroundColor = '';
+                        document.documentElement.style.color = '';
+                    } else {
+                        // 白天模式：确保移除暗色类
+                        document.body.classList.remove('dark-mode');
+                    }
+                    return true;
+                } else if (retryCount < maxRetries) {
+                    retryCount++;
+                    setTimeout(applyBodyClass, 10); // 10ms后重试
+                    return false;
+                }
+                return false;
+            };
+            applyBodyClass();
+        })();
+    </script>
     <link rel="stylesheet" href="/static/cdn/element-ui/2.15.1/theme-chalk/index.min.css">
     <script src="/static/cdn/vue/2.6.11/vue.min.js"></script>
     <script src="/static/cdn/element-ui/2.15.1/index.js"></script>
@@ -15,6 +82,7 @@
     <link rel="stylesheet" href="/static/css/common.css?v=sdsderfrgfgdfdf" />
     <link rel="stylesheet" href="/static/css/icono.min.css" />
     <link rel="stylesheet" href="/static/css/icon/iconfont.css?v=fgjlgfda"/>
+    <link rel="stylesheet" href="/static/css/dark-mode.css" />
 </head>
 <body class="visitorBody">
 <div id="app" class="chatCenter">
@@ -25,14 +93,14 @@
                 <el-avatar class="chatEntTitleLogo" :size="35" :src="kefuInfo.avatar"></el-avatar>
             </el-badge>
             <div>
-                <div>Live Chat Support</div>
+                <div>在线客服</div>
             </div>
         </div>
         <div class="chatEntBox">
             <div class="chatContext chatVisitorPage">
                 <div class="chatBox">
                     <div class="chatNotice" v-on:click="getHistoryMessage" v-show="showLoadMore">
-                        <a href="javascript:;" class="chatNoticeContent" style="color: #07a9fe;">Load more messages</a>
+                        <a href="javascript:;" class="chatNoticeContent" style="color: #07a9fe;">加载更多消息</a>
                     </div>
                     <el-row :gutter="2" v-for="v in msgList" v-bind:class="{'chatBoxMe': v.is_kefu==false}">
                         <div class="chatTime" v-bind:class="{'chatTimeHide': v.show_time==false}"><span><{v.time}></span></div>
@@ -53,14 +121,14 @@
             <div class="chatBoxSend">
                 <div class="visitorIconBox">
                     <el-tooltip content="Send emoji" placement="top">
-                        <div class="iconBtn iconfont icon-xiaolian" style="margin-left:10px;font-size: 24px;cursor: pointer;" @click.stop="showFaceIcon==true?showFaceIcon=false:showFaceIcon=true"></div>
+                        <div class="iconBtn iconfont icon-xiaolian" style="margin-left:15px;font-size: 20px;cursor: pointer;" @click.stop="showFaceIcon==true?showFaceIcon=false:showFaceIcon=true"></div>
                     </el-tooltip>
 
                     <el-tooltip content="Upload image" placement="top">
-                        <div class="iconBtn el-icon-picture" id="uploadImg" v-on:click="uploadImg('/uploadimg')" style="font-size: 24px;"></div>
+                        <div class="iconBtn el-icon-picture" id="uploadImg" v-on:click="uploadImg('/uploadimg')" style="font-size: 20px;"></div>
                     </el-tooltip>
                     <el-tooltip content="Upload file" placement="top">
-                        <div class="iconBtn el-icon-upload" id="uploadFile" v-on:click="uploadFile('/uploadfile')" style="font-size: 26px;"></div>
+                        <div class="iconBtn el-icon-upload" id="uploadFile" v-on:click="uploadFile('/uploadfile')" style="font-size: 20px;"></div>
                     </el-tooltip>
 
                     <div style="display: none" title="Emoji" class="icono-smile visitorIconBtns visitorFaceBtn"></div>
@@ -73,13 +141,17 @@
                     </ul>
                     <div class="clear"></div>
                 </div>
-                <el-input :rows="2" type="textarea" resize="none" class="visitorEditorArea" @focus="scrollBottom;showIconBtns=false" @blur="scrollBottom;showIconBtns=false" v-model="messageContent" v-on:keyup.enter.native="chatToUser">
-                </el-input>
-                <el-button type="primary" size="mini" class="visitorEditorBtn" :loading="sendDisabled" :disabled="sendDisabled||messageContent==''" v-on:click="chatToUser();showIconBtns=false"><{ sendDisabled ? 'Sending...' : 'Send' }></el-button>
+                <div class="message-box-send">
+                    <el-input :rows="2" type="textarea" resize="none" class="visitorEditorArea" @focus="scrollBottom;showIconBtns=false" @blur="scrollBottom;showIconBtns=false" v-model="messageContent" v-on:keyup.enter.native="chatToUser">
+                    </el-input>
+                    <div class="btn-box">
+<el-button type="primary" size="mini" class="visitorEditorBtn" :loading="sendDisabled" :disabled="sendDisabled||messageContent==''" v-on:click="chatToUser();showIconBtns=false"><{ sendDisabled ? '发送中...' : '发送' }></el-button>
+                    </div>
+                </div>
             </div>
         </div>
         <div class="chatArticle">
-            <h3 class="hotQuestionTitle">Announcements</h3>
+            <h3 class="hotQuestionTitle">公告</h3>
             <div class="allNotice" v-html><{kefuInfo.allNotice}></div>
         </div>
 
@@ -91,6 +163,51 @@
 <script>
     var KEFU_ID='{{.KEFU_ID}}';
     var REFER='{{.Refer}}';
+
+    // 主题切换函数
+    function setTheme(theme) {
+        if (theme === 'dark') {
+            document.body.classList.add('dark-mode');
+            localStorage.setItem('theme', 'dark');
+        } else {
+            document.body.classList.remove('dark-mode');
+            localStorage.setItem('theme', 'light');
+        }
+    }
+
+    // 监听来自父页面的主题变化消息
+    window.addEventListener('message', function(event) {
+        // 安全检查：可以添加 origin 验证
+        // if (event.origin !== 'https://your-parent-domain.com') return;
+
+        if (event.data && event.data.type === 'theme-change') {
+            console.log('Received theme change:', event.data.theme);
+            setTheme(event.data.theme);
+        }
+    });
+
+    // 页面加载时，应用主题（已在 head 中预设）
+    (function() {
+        // 检查是否在 head 中已经设置了暗色模式
+        const isDarkInit = document.documentElement.classList.contains('dark-mode-init');
+
+        if (isDarkInit) {
+            // 已在 head 中设置为暗色，直接应用
+            document.body.classList.add('dark-mode');
+            localStorage.setItem('theme', 'dark');
+            // 移除临时类
+            document.documentElement.classList.remove('dark-mode-init');
+        } else {
+            // 确保是亮色模式
+            document.body.classList.remove('dark-mode');
+            localStorage.setItem('theme', 'light');
+        }
+
+        // 通知父页面已准备好接收主题消息
+        if (window.parent !== window) {
+            window.parent.postMessage({ type: 'iframe-ready' }, '*');
+        }
+    })();
 </script>
 <script>
     var initVue=function(){
@@ -149,7 +266,7 @@
                         return;
                     }
                     this.visitor.to_id=msg.id;
-                    this.showTitle(msg.name+", is chatting with you");
+                    this.showTitle(msg.name+", 正正与您对话");
                     this.scrollBottom();
                     this.showKfonline=true;
                 }
@@ -361,7 +478,7 @@
                     var code=res.code;
                     if(code!=200) return;
                     _this.kefuInfo=res.result;
-                    _this.showTitle(_this.kefuInfo.nickname+" at your service.");
+                    _this.showTitle(_this.kefuInfo.nickname+" 为您服务.");
                     if(!_this.kefuInfo.welcome) return;
                     var msg={
                         content:replaceContent(_this.kefuInfo.welcome),