diff --git a/frontend/src/pages/ForumDetail.jsx b/frontend/src/pages/ForumDetail.jsx
index a944022..8b286ff 100644
--- a/frontend/src/pages/ForumDetail.jsx
+++ b/frontend/src/pages/ForumDetail.jsx
@@ -2,7 +2,7 @@ import React, { useState, useEffect } from 'react';
 import { useParams, useNavigate } from 'react-router-dom';
 import { Typography, Card, Avatar, Tag, Space, Button, Divider, Input, message, Upload, Tooltip, Grid } from 'antd';
 import { UserOutlined, ClockCircleOutlined, EyeOutlined, CheckCircleFilled, LeftOutlined, UploadOutlined, EditOutlined } from '@ant-design/icons';
-import { getTopicDetail, createReply, uploadMedia } from '../api';
+import { getTopicDetail, createReply, uploadMedia, getStarUsers } from '../api';
 import { useAuth } from '../context/AuthContext';
 import LoginModal from '../components/LoginModal';
 import CreateTopicModal from '../components/CreateTopicModal';
@@ -41,6 +41,9 @@ const ForumDetail = () => {
   const [replyUploading, setReplyUploading] = useState(false);
   const [replyMediaIds, setReplyMediaIds] = useState([]);
 
+  // Star Users State
+  const [starUsers, setStarUsers] = useState([]);
+
   const fetchTopic = async () => {
     try {
       const res = await getTopicDetail(id);
@@ -53,14 +56,31 @@ const ForumDetail = () => {
     }
   };
 
+  const fetchStarUsers = async () => {
+    try {
+      const res = await getStarUsers();
+      setStarUsers(res.data || []);
+    } catch (error) {
+      console.error('Fetch star users failed', error);
+    }
+  };
+
   const hasFetched = React.useRef(false);
   useEffect(() => {
     if (!hasFetched.current) {
         fetchTopic();
+        fetchStarUsers();
         hasFetched.current = true;
     }
   }, [id]);
 
+  const handleReplyToUser = (nickname) => {
+      const mentionText = `@${nickname} `;
+      setReplyContent(prev => prev + mentionText);
+      // Focus logic if needed, but simple append works
+      message.info(`已添加 @${nickname}`);
+  };
+
   const handleSubmitReply = async () => {
     if (!user) {
       setLoginModalVisible(true);
@@ -272,6 +292,14 @@ const ForumDetail = () => {
                             <Space size={isMobile ? 'small' : 'middle'} align="center">
                                 <Text style={{ color: '#aaa', fontWeight: 'bold', fontSize: isMobile ? 13 : 14 }}>{reply.author_info?.nickname}</Text>
                                 <Text style={{ color: '#666', fontSize: 12 }}>{new Date(reply.created_at).toLocaleString()}</Text>
+                                <Button 
+                                    type="link" 
+                                    size="small" 
+                                    onClick={() => handleReplyToUser(reply.author_info?.nickname)}
+                                    style={{ padding: 0, height: 'auto' }}
+                                >
+                                    回复
+                                </Button>
                             </Space>
                             <Text style={{ color: '#444', fontSize: 12 }}>#{index + 1}</Text>
                         </div>
@@ -308,6 +336,25 @@ const ForumDetail = () => {
                     placeholder="友善回复，分享你的见解... (支持 Markdown)"
                     style={{ marginBottom: 16, background: '#111', border: '1px solid #333', color: '#fff' }}
                 />
+                
+                {starUsers.length > 0 && (
+                    <div style={{ marginBottom: 16 }}>
+                        <Text style={{ color: '#888', marginRight: 8 }}>@技术专家:</Text>
+                        <Space wrap>
+                            {starUsers.map(user => (
+                                <Tag 
+                                    key={user.id} 
+                                    color="gold" 
+                                    style={{ cursor: 'pointer' }}
+                                    onClick={() => handleReplyToUser(user.nickname)}
+                                >
+                                    {user.nickname}
+                                </Tag>
+                            ))}
+                        </Space>
+                    </div>
+                )}
+
                 <div style={{ display: 'flex', flexDirection: isMobile ? 'column' : 'row', justifyContent: 'space-between', alignItems: isMobile ? 'stretch' : 'center', gap: isMobile ? 10 : 0 }}>
                     <Upload 
                         beforeUpload={handleReplyUpload} 
diff --git a/miniprogram/src/subpackages/forum/detail/index.tsx b/miniprogram/src/subpackages/forum/detail/index.tsx
index 9b8b72a..cdceb05 100644
--- a/miniprogram/src/subpackages/forum/detail/index.tsx
+++ b/miniprogram/src/subpackages/forum/detail/index.tsx
@@ -1,8 +1,8 @@
 import React, { useState, useEffect } from 'react'
 import Taro, { useRouter, useShareAppMessage, useDidShow } from '@tarojs/taro'
 import { View, Text, Image, Video, RichText, Input, ScrollView } from '@tarojs/components'
-import { AtActivityIndicator, AtIcon } from 'taro-ui'
-import { getTopicDetail, createReply, uploadMedia } from '../../../api'
+import { AtActivityIndicator, AtIcon, AtActionSheet, AtActionSheetItem } from 'taro-ui'
+import { getTopicDetail, createReply, uploadMedia, getStarUsers } from '../../../api'
 import { marked } from 'marked'
 import './detail.scss'
 
@@ -16,6 +16,10 @@ const ForumDetail = () => {
   const [sending, setSending] = useState(false)
   const [htmlContent, setHtmlContent] = useState('')
   const [userInfo, setUserInfo] = useState<any>(null)
+  
+  // Star Users & Mention
+  const [starUsers, setStarUsers] = useState<any[]>([])
+  const [showStarUsers, setShowStarUsers] = useState(false)
 
   const fetchDetail = async () => {
     try {
@@ -38,12 +42,24 @@ const ForumDetail = () => {
     }
   }
 
+  const fetchStarUsers = async () => {
+      try {
+          const res = await getStarUsers()
+          // API might return array directly or { data: [] }
+          const users = Array.isArray(res) ? res : (res.data || [])
+          setStarUsers(users)
+      } catch (error) {
+          console.error('Fetch star users failed', error)
+      }
+  }
+
   useEffect(() => {
     const info = Taro.getStorageSync('userInfo')
     if (info) setUserInfo(info)
 
     if (id) {
         fetchDetail()
+        fetchStarUsers()
     }
   }, [id])
 
@@ -53,6 +69,12 @@ const ForumDetail = () => {
       }
   })
 
+  const handleReplyToUser = (nickname) => {
+      const mentionText = `@${nickname} `
+      setReplyContent(prev => prev + mentionText)
+      setShowStarUsers(false)
+  }
+
   useShareAppMessage(() => {
     return {
       title: topic?.title || '技术社区',
@@ -199,7 +221,12 @@ const ForumDetail = () => {
                              <Text className='nickname'>{reply.author_info?.nickname}</Text>
                              <Text style={{fontSize: 10, color: '#666', marginTop: 2}}>#{idx + 1} • {new Date(reply.created_at).toLocaleDateString()}</Text>
                         </View>
-                        <AtIcon value='message' size='14' color='#444' />
+                        <View style={{display: 'flex', alignItems: 'center'}}>
+                            <View onClick={() => handleReplyToUser(reply.author_info?.nickname)} style={{marginRight: 10, padding: '2px 6px', background: '#f0f0f0', borderRadius: 4}}>
+                                <Text style={{fontSize: 10, color: '#666'}}>回复</Text>
+                            </View>
+                            <AtIcon value='message' size='14' color='#444' />
+                        </View>
                     </View>
                     <View className='reply-content'>
                         {/* Simple markdown render for replies or just text if complex */}
@@ -216,6 +243,9 @@ const ForumDetail = () => {
         <View className='action-btn' onClick={handleUpload}>
             <AtIcon value='image' size='20' color='#888' />
         </View>
+        <View className='action-btn' onClick={() => setShowStarUsers(true)} style={{marginLeft: 0}}>
+            <AtIcon value='at' size='20' color='#888' />
+        </View>
         <View className='input-wrapper'>
             <Input 
                 value={replyContent}
@@ -229,6 +259,18 @@ const ForumDetail = () => {
             {sending ? <AtActivityIndicator size={20} /> : <Text className='send-btn'>发送</Text>}
         </View>
       </View>
+
+      <AtActionSheet isOpened={showStarUsers} cancelText='取消' title='选择要@的技术专家' onCancel={() => setShowStarUsers(false)} onClose={() => setShowStarUsers(false)}>
+        {starUsers.map(user => (
+            <AtActionSheetItem key={user.id} onClick={() => handleReplyToUser(user.nickname)}>
+                <View style={{display: 'flex', alignItems: 'center', justifyContent: 'center'}}>
+                    <Image src={user.avatar_url || 'https://via.placeholder.com/30'} style={{width: 24, height: 24, borderRadius: 12, marginRight: 8}} />
+                    <Text>{user.nickname}</Text>
+                    <Text style={{fontSize: 10, color: '#999', marginLeft: 4}}>({user.title || '专家'})</Text>
+                </View>
+            </AtActionSheetItem>
+        ))}
+      </AtActionSheet>
     </View>
   )
 }