diff --git a/README.md b/README.md
index 68eaf84..41f3dd6 100644
--- a/README.md
+++ b/README.md
@@ -30,17 +30,21 @@
 pip install -r requirements.txt
 ```
 
-### 启动服务
+### 启动主服务
 
 ```bash
 python backend/app.py
 ```
 
-### 访问地址
+访问地址: http://localhost:19004
 
+### 启动后台管理
+
+```bash
+python admin/app.py
 ```
-http://localhost:19004
-```
+
+后台地址: http://localhost:19005
 
 ## 项目结构
 
@@ -102,4 +106,9 @@ tech-forum/
 
 ## License
 
+MIT��录
+- 评论回复点赞
+
+## License
+
 MIT
\ No newline at end of file
diff --git a/admin/app.py b/admin/app.py
new file mode 100644
index 0000000..969cd6c
--- /dev/null
+++ b/admin/app.py
@@ -0,0 +1,329 @@
+"""
+技术论坛 - 后台管理系统
+"""
+
+from flask import Flask, render_template, jsonify, request
+from flask_cors import CORS
+import json
+from pathlib import Path
+from datetime import datetime
+
+app = Flask(__name__)
+CORS(app)
+
+# 数据目录
+DATA_DIR = Path(__file__).parent.parent / 'data'
+USERS_FILE = DATA_DIR / 'users.json'
+POSTS_FILE = DATA_DIR / 'posts.json'
+TOPICS_FILE = DATA_DIR / 'topics.json'
+
+def load_users():
+    if USERS_FILE.exists():
+        return json.loads(USERS_FILE.read_text(encoding='utf-8'))
+    return {}
+
+def load_posts():
+    if POSTS_FILE.exists():
+        return json.loads(POSTS_FILE.read_text(encoding='utf-8'))
+    return {}
+
+def load_topics():
+    if TOPICS_FILE.exists():
+        return json.loads(TOPICS_FILE.read_text(encoding='utf-8'))
+    return {}
+
+def save_users(users):
+    USERS_FILE.write_text(json.dumps(users, ensure_ascii=False, indent=2), encoding='utf-8')
+
+def save_posts(posts):
+    POSTS_FILE.write_text(json.dumps(posts, ensure_ascii=False, indent=2), encoding='utf-8')
+
+def save_topics(topics):
+    TOPICS_FILE.write_text(json.dumps(topics, ensure_ascii=False, indent=2), encoding='utf-8')
+
+# ============ 页面路由 ============
+
+@app.route('/')
+def index():
+    return render_template('index.html')
+
+@app.route('/users')
+def users_page():
+    return render_template('users.html')
+
+@app.route('/posts')
+def posts_page():
+    return render_template('posts.html')
+
+@app.route('/topics')
+def topics_page():
+    return render_template('topics.html')
+
+# ============ API路由 ============
+
+@app.route('/api/stats')
+def api_stats():
+    users = load_users()
+    posts = load_posts()
+    topics = load_topics()
+    
+    # 统计
+    total_messages = 0
+    for post in posts.values():
+        total_messages += len(post.get('replies', []))
+    
+    today = datetime.now().strftime('%Y-%m-%d')
+    today_posts = sum(1 for p in posts.values() if p.get('created_at', '').startswith(today))
+    today_users = sum(1 for u in users.values() if u.get('created_at', '').startswith(today))
+    
+    # 帖子类型统计
+    discussion_count = sum(1 for p in posts.values() if p.get('type') == 'discussion')
+    share_count = sum(1 for p in posts.values() if p.get('type') == 'share')
+    
+    return jsonify({
+        'users_count': len(users),
+        'posts_count': len(posts),
+        'topics_count': len(topics),
+        'messages_count': total_messages,
+        'today_posts': today_posts,
+        'today_users': today_users,
+        'discussion_count': discussion_count,
+        'share_count': share_count,
+    })
+
+@app.route('/api/users')
+def api_users():
+    users = load_users()
+    posts = load_posts()
+    
+    user_list = []
+    for uid, user in users.items():
+        # 统计用户帖子和回复数
+        posts_count = len(user.get('posts', []))
+        replies_count = 0
+        for post in posts.values():
+            for reply in post.get('replies', []):
+                if reply.get('author_id') == uid:
+                    replies_count += 1
+        
+        user_list.append({
+            'id': uid,
+            'username': user.get('username', ''),
+            'email': user.get('email', ''),
+            'phone': user.get('phone', ''),
+            'posts_count': posts_count,
+            'replies_count': replies_count,
+            'created_at': user.get('created_at', ''),
+        })
+    
+    user_list.sort(key=lambda x: x['created_at'], reverse=True)
+    return jsonify(user_list)
+
+@app.route('/api/users/<user_id>', methods=['DELETE'])
+def api_delete_user(user_id):
+    users = load_users()
+    posts = load_posts()
+    topics = load_topics()
+    
+    if user_id not in users:
+        return jsonify({'error': '用户不存在'}), 404
+    
+    # 删除用户的帖子
+    for post_id in users[user_id].get('posts', []):
+        if post_id in posts:
+            del posts[post_id]
+    
+    # 从主题关注中移除
+    for topic in topics.values():
+        if user_id in topic.get('followers', []):
+            topic['followers'].remove(user_id)
+    
+    # 删除用户
+    del users[user_id]
+    
+    save_users(users)
+    save_posts(posts)
+    save_topics(topics)
+    
+    return jsonify({'success': True})
+
+@app.route('/api/posts')
+def api_posts():
+    posts = load_posts()
+    users = load_users()
+    
+    post_type = request.args.get('type')
+    
+    post_list = []
+    for pid, post in posts.items():
+        if post_type and post['type'] != post_type:
+            continue
+        
+        author = users.get(post['author_id'], {})
+        post_list.append({
+            'id': pid,
+            'title': post['title'],
+            'type': post['type'],
+            'author': author.get('username', '未知'),
+            'author_id': post['author_id'],
+            'likes': len(post.get('likes', [])),
+            'replies': len(post.get('replies', [])),
+            'views': post.get('views', 0),
+            'is_pinned': post.get('is_pinned', False),
+            'created_at': post['created_at'],
+        })
+    
+    post_list.sort(key=lambda x: x['created_at'], reverse=True)
+    return jsonify(post_list)
+
+@app.route('/api/posts/<post_id>')
+def api_post_detail(post_id):
+    posts = load_posts()
+    users = load_users()
+    
+    post = posts.get(post_id)
+    if not post:
+        return jsonify({'error': '帖子不存在'}), 404
+    
+    author = users.get(post['author_id'], {})
+    
+    # 获取回复
+    replies = []
+    for reply in post.get('replies', []):
+        reply_author = users.get(reply['author_id'], {})
+        replies.append({
+            'id': reply['id'],
+            'content': reply['content'][:100] + '...' if len(reply['content']) > 100 else reply['content'],
+            'author': reply_author.get('username', '未知'),
+            'likes': len(reply.get('likes', [])),
+            'created_at': reply['created_at'],
+        })
+    
+    return jsonify({
+        'id': post_id,
+        'title': post['title'],
+        'content': post['content'],
+        'type': post['type'],
+        'author': author.get('username', '未知'),
+        'tags': post.get('tags', []),
+        'likes': len(post.get('likes', [])),
+        'replies': replies,
+        'views': post.get('views', 0),
+        'is_pinned': post.get('is_pinned', False),
+        'created_at': post['created_at'],
+    })
+
+@app.route('/api/posts/<post_id>', methods=['DELETE'])
+def api_delete_post(post_id):
+    posts = load_posts()
+    users = load_users()
+    
+    if post_id not in posts:
+        return jsonify({'error': '帖子不存在'}), 404
+    
+    author_id = posts[post_id].get('author_id')
+    
+    del posts[post_id]
+    
+    # 从用户列表中移除
+    if author_id and author_id in users:
+        if post_id in users[author_id].get('posts', []):
+            users[author_id]['posts'].remove(post_id)
+    
+    save_posts(posts)
+    save_users(users)
+    
+    return jsonify({'success': True})
+
+@app.route('/api/posts/<post_id>/pin', methods=['POST'])
+def api_pin_post(post_id):
+    posts = load_posts()
+    
+    if post_id not in posts:
+        return jsonify({'error': '帖子不存在'}), 404
+    
+    posts[post_id]['is_pinned'] = not posts[post_id].get('is_pinned', False)
+    save_posts(posts)
+    
+    return jsonify({
+        'success': True,
+        'is_pinned': posts[post_id]['is_pinned']
+    })
+
+@app.route('/api/topics')
+def api_topics():
+    topics = load_topics()
+    users = load_users()
+    
+    topic_list = []
+    for tid, topic in topics.items():
+        author = users.get(topic['author_id'], {})
+        topic_list.append({
+            'id': tid,
+            'name': topic['name'],
+            'icon': topic.get('icon', '🔧'),
+            'author': author.get('username', '未知'),
+            'sub_topics_count': len(topic.get('sub_topics', [])),
+            'questions_count': len(topic.get('questions', [])),
+            'followers_count': len(topic.get('followers', [])),
+            'created_at': topic['created_at'],
+        })
+    
+    topic_list.sort(key=lambda x: x['followers_count'], reverse=True)
+    return jsonify(topic_list)
+
+@app.route('/api/topics/<topic_id>')
+def api_topic_detail(topic_id):
+    topics = load_topics()
+    users = load_users()
+    
+    topic = topics.get(topic_id)
+    if not topic:
+        return jsonify({'error': '主题不存在'}), 404
+    
+    author = users.get(topic['author_id'], {})
+    
+    return jsonify({
+        'id': topic_id,
+        'name': topic['name'],
+        'description': topic.get('description', ''),
+        'icon': topic.get('icon', '🔧'),
+        'author': author.get('username', '未知'),
+        'sub_topics': topic.get('sub_topics', []),
+        'questions': topic.get('questions', []),
+        'followers_count': len(topic.get('followers', [])),
+        'created_at': topic['created_at'],
+    })
+
+@app.route('/api/topics/<topic_id>', methods=['DELETE'])
+def api_delete_topic(topic_id):
+    topics = load_topics()
+    
+    if topic_id not in topics:
+        return jsonify({'error': '主题不存在'}), 404
+    
+    del topics[topic_id]
+    save_topics(topics)
+    
+    return jsonify({'success': True})
+
+@app.route('/api/tags')
+def api_tags():
+    posts = load_posts()
+    
+    tag_counts = {}
+    for post in posts.values():
+        for tag in post.get('tags', []):
+            tag_counts[tag] = tag_counts.get(tag, 0) + 1
+    
+    tags = sorted(tag_counts.items(), key=lambda x: x[1], reverse=True)
+    return jsonify([{'name': t[0], 'count': t[1]} for t in tags[:20]])
+
+if __name__ == '__main__':
+    print("=" * 50)
+    print("技术论坛 - 后台管理系统")
+    print("=" * 50)
+    print(f"访问地址: http://localhost:19005")
+    print("=" * 50)
+    
+    app.run(host='0.0.0.0', port=19005, debug=True)
\ No newline at end of file
diff --git a/admin/templates/index.html b/admin/templates/index.html
new file mode 100644
index 0000000..953a882
--- /dev/null
+++ b/admin/templates/index.html
@@ -0,0 +1,206 @@
+<!DOCTYPE html>
+<html lang="zh-CN">
+<head>
+    <meta charset="UTF-8">
+    <meta name="viewport" content="width=device-width, initial-scale=1.0">
+    <title>技术论坛 - 后台管理</title>
+    <script src="https://cdn.tailwindcss.com"></script>
+    <link href="https://cdn.jsdelivr.net/npm/remixicon@3.5.0/fonts/remixicon.css" rel="stylesheet">
+    <style>
+        .gradient-bg { background: linear-gradient(135deg, #3b82f6 0%, #8b5cf6 100%); }
+    </style>
+</head>
+<body class="bg-gray-50 min-h-screen">
+    <div class="flex">
+        <!-- 侧边栏 -->
+        <aside class="w-64 bg-slate-800 min-h-screen fixed left-0 top-0">
+            <div class="p-6">
+                <h1 class="text-white text-xl font-bold flex items-center gap-2">
+                    <i class="ri-code-s-slash-line text-2xl text-blue-400"></i>
+                    论坛后台
+                </h1>
+            </div>
+            <nav class="mt-6">
+                <a href="/" class="flex items-center gap-3 px-6 py-3 bg-slate-700 text-white">
+                    <i class="ri-dashboard-line"></i><span>仪表盘</span>
+                </a>
+                <a href="/users" class="flex items-center gap-3 px-6 py-3 text-slate-300 hover:bg-slate-700 hover:text-white">
+                    <i class="ri-user-line"></i><span>用户管理</span>
+                </a>
+                <a href="/posts" class="flex items-center gap-3 px-6 py-3 text-slate-300 hover:bg-slate-700 hover:text-white">
+                    <i class="ri-file-text-line"></i><span>帖子管理</span>
+                </a>
+                <a href="/topics" class="flex items-center gap-3 px-6 py-3 text-slate-300 hover:bg-slate-700 hover:text-white">
+                    <i class="ri-tools-line"></i><span>主题管理</span>
+                </a>
+            </nav>
+            <div class="absolute bottom-0 left-0 right-0 p-4 border-t border-slate-700">
+                <a href="http://localhost:19004" target="_blank" class="text-slate-400 hover:text-white text-sm flex items-center gap-2">
+                    <i class="ri-external-link-line"></i> 访问前台
+                </a>
+            </div>
+        </aside>
+
+        <!-- 主内容 -->
+        <main class="ml-64 flex-1 p-8">
+            <!-- 统计卡片 -->
+            <div class="grid grid-cols-1 md:grid-cols-2 lg:grid-cols-4 gap-6 mb-8">
+                <div class="bg-white rounded-xl p-6 shadow-sm border border-gray-100">
+                    <div class="flex items-center justify-between">
+                        <div>
+                            <p class="text-gray-500 text-sm">用户总数</p>
+                            <p class="text-3xl font-bold text-gray-800 mt-2" id="stat-users">-</p>
+                        </div>
+                        <div class="w-12 h-12 bg-blue-100 rounded-lg flex items-center justify-center">
+                            <i class="ri-user-line text-2xl text-blue-600"></i>
+                        </div>
+                    </div>
+                    <p class="text-xs text-gray-400 mt-2">今日新增: <span id="stat-today-users">0</span></p>
+                </div>
+                
+                <div class="bg-white rounded-xl p-6 shadow-sm border border-gray-100">
+                    <div class="flex items-center justify-between">
+                        <div>
+                            <p class="text-gray-500 text-sm">帖子总数</p>
+                            <p class="text-3xl font-bold text-gray-800 mt-2" id="stat-posts">-</p>
+                        </div>
+                        <div class="w-12 h-12 bg-green-100 rounded-lg flex items-center justify-center">
+                            <i class="ri-file-text-line text-2xl text-green-600"></i>
+                        </div>
+                    </div>
+                    <p class="text-xs text-gray-400 mt-2">今日发布: <span id="stat-today-posts">0</span></p>
+                </div>
+                
+                <div class="bg-white rounded-xl p-6 shadow-sm border border-gray-100">
+                    <div class="flex items-center justify-between">
+                        <div>
+                            <p class="text-gray-500 text-sm">主题总数</p>
+                            <p class="text-3xl font-bold text-gray-800 mt-2" id="stat-topics">-</p>
+                        </div>
+                        <div class="w-12 h-12 bg-purple-100 rounded-lg flex items-center justify-center">
+                            <i class="ri-tools-line text-2xl text-purple-600"></i>
+                        </div>
+                    </div>
+                </div>
+                
+                <div class="bg-white rounded-xl p-6 shadow-sm border border-gray-100">
+                    <div class="flex items-center justify-between">
+                        <div>
+                            <p class="text-gray-500 text-sm">消息总数</p>
+                            <p class="text-3xl font-bold text-gray-800 mt-2" id="stat-messages">-</p>
+                        </div>
+                        <div class="w-12 h-12 bg-orange-100 rounded-lg flex items-center justify-center">
+                            <i class="ri-message-3-line text-2xl text-orange-600"></i>
+                        </div>
+                    </div>
+                </div>
+            </div>
+
+            <!-- 帖子类型分布 & 热门标签 -->
+            <div class="grid grid-cols-1 lg:grid-cols-2 gap-6">
+                <div class="bg-white rounded-xl shadow-sm border border-gray-100 p-6">
+                    <h2 class="text-lg font-semibold text-gray-800 mb-4 flex items-center gap-2">
+                        <i class="ri-pie-chart-line text-blue-500"></i>
+                        帖子类型分布
+                    </h2>
+                    <div id="typeChart" class="flex items-center justify-center gap-8 py-8">
+                        <div class="text-center">
+                            <div class="text-3xl font-bold text-blue-600" id="discussion-count">0</div>
+                            <div class="text-sm text-gray-500">技术交流</div>
+                        </div>
+                        <div class="text-center">
+                            <div class="text-3xl font-bold text-purple-600" id="share-count">0</div>
+                            <div class="text-sm text-gray-500">工具分享</div>
+                        </div>
+                    </div>
+                </div>
+
+                <div class="bg-white rounded-xl shadow-sm border border-gray-100 p-6">
+                    <h2 class="text-lg font-semibold text-gray-800 mb-4 flex items-center gap-2">
+                        <i class="ri-price-tag-3-line text-green-500"></i>
+                        热门标签
+                    </h2>
+                    <div id="tagsList" class="flex flex-wrap gap-2">
+                        <p class="text-gray-500">加载中...</p>
+                    </div>
+                </div>
+            </div>
+
+            <!-- 最新帖子 -->
+            <div class="mt-6 bg-white rounded-xl shadow-sm border border-gray-100 p-6">
+                <h2 class="text-lg font-semibold text-gray-800 mb-4 flex items-center gap-2">
+                    <i class="ri-time-line text-purple-500"></i>
+                    最新帖子
+                </h2>
+                <div id="recentPosts" class="space-y-3">
+                    <p class="text-gray-500">加载中...</p>
+                </div>
+            </div>
+        </main>
+    </div>
+
+    <script>
+        async function loadStats() {
+            const res = await fetch('/api/stats');
+            const data = await res.json();
+            
+            document.getElementById('stat-users').textContent = data.users_count;
+            document.getElementById('stat-posts').textContent = data.posts_count;
+            document.getElementById('stat-topics').textContent = data.topics_count;
+            document.getElementById('stat-messages').textContent = data.messages_count;
+            document.getElementById('stat-today-users').textContent = data.today_users;
+            document.getElementById('stat-today-posts').textContent = data.today_posts;
+            document.getElementById('discussion-count').textContent = data.discussion_count;
+            document.getElementById('share-count').textContent = data.share_count;
+        }
+
+        async function loadTags() {
+            const res = await fetch('/api/tags');
+            const tags = await res.json();
+            
+            const container = document.getElementById('tagsList');
+            if (tags.length === 0) {
+                container.innerHTML = '<p class="text-gray-500">暂无标签</p>';
+                return;
+            }
+            
+            container.innerHTML = tags.map(tag => `
+                <span class="px-3 py-1 bg-gray-100 text-gray-700 rounded-full text-sm">
+                    ${tag.name} (${tag.count})
+                </span>
+            `).join('');
+        }
+
+        async function loadRecentPosts() {
+            const res = await fetch('/api/posts');
+            const posts = await res.json();
+            
+            const container = document.getElementById('recentPosts');
+            if (posts.length === 0) {
+                container.innerHTML = '<p class="text-gray-500">暂无帖子</p>';
+                return;
+            }
+            
+            container.innerHTML = posts.slice(0, 5).map(p => `
+                <div class="flex items-center justify-between p-3 bg-gray-50 rounded-lg">
+                    <div class="flex items-center gap-3">
+                        <span class="px-2 py-0.5 rounded text-xs ${p.type === 'discussion' ? 'bg-blue-100 text-blue-600' : 'bg-purple-100 text-purple-600'}">
+                            ${p.type === 'discussion' ? '交流' : '分享'}
+                        </span>
+                        <span class="font-medium text-gray-800">${p.title}</span>
+                    </div>
+                    <div class="flex items-center gap-4 text-sm text-gray-500">
+                        <span>${p.author}</span>
+                        <span>${new Date(p.created_at).toLocaleDateString()}</span>
+                        <span><i class="ri-eye-line"></i> ${p.views}</span>
+                    </div>
+                </div>
+            `).join('');
+        }
+
+        loadStats();
+        loadTags();
+        loadRecentPosts();
+    </script>
+</body>
+</html>
\ No newline at end of file
diff --git a/admin/templates/posts.html b/admin/templates/posts.html
new file mode 100644
index 0000000..7201b24
--- /dev/null
+++ b/admin/templates/posts.html
@@ -0,0 +1,203 @@
+<!DOCTYPE html>
+<html lang="zh-CN">
+<head>
+    <meta charset="UTF-8">
+    <meta name="viewport" content="width=device-width, initial-scale=1.0">
+    <title>帖子管理 - 论坛后台</title>
+    <script src="https://cdn.tailwindcss.com"></script>
+    <link href="https://cdn.jsdelivr.net/npm/remixicon@3.5.0/fonts/remixicon.css" rel="stylesheet">
+</head>
+<body class="bg-gray-50 min-h-screen">
+    <div class="flex">
+        <aside class="w-64 bg-slate-800 min-h-screen fixed left-0 top-0">
+            <div class="p-6">
+                <h1 class="text-white text-xl font-bold flex items-center gap-2">
+                    <i class="ri-code-s-slash-line text-2xl text-blue-400"></i>
+                    论坛后台
+                </h1>
+            </div>
+            <nav class="mt-6">
+                <a href="/" class="flex items-center gap-3 px-6 py-3 text-slate-300 hover:bg-slate-700 hover:text-white">
+                    <i class="ri-dashboard-line"></i><span>仪表盘</span>
+                </a>
+                <a href="/users" class="flex items-center gap-3 px-6 py-3 text-slate-300 hover:bg-slate-700 hover:text-white">
+                    <i class="ri-user-line"></i><span>用户管理</span>
+                </a>
+                <a href="/posts" class="flex items-center gap-3 px-6 py-3 bg-slate-700 text-white">
+                    <i class="ri-file-text-line"></i><span>帖子管理</span>
+                </a>
+                <a href="/topics" class="flex items-center gap-3 px-6 py-3 text-slate-300 hover:bg-slate-700 hover:text-white">
+                    <i class="ri-tools-line"></i><span>主题管理</span>
+                </a>
+            </nav>
+        </aside>
+
+        <main class="ml-64 flex-1 p-8">
+            <div class="flex items-center justify-between mb-6">
+                <h1 class="text-2xl font-bold text-gray-800">帖子管理</h1>
+                <select id="typeFilter" onchange="loadPosts()" class="px-4 py-2 border border-gray-200 rounded-lg">
+                    <option value="">全部类型</option>
+                    <option value="discussion">技术交流</option>
+                    <option value="share">工具分享</option>
+                </select>
+            </div>
+
+            <div class="bg-white rounded-xl shadow-sm border border-gray-100 overflow-hidden">
+                <table class="w-full">
+                    <thead class="bg-gray-50 border-b border-gray-100">
+                        <tr>
+                            <th class="px-6 py-3 text-left text-sm font-medium text-gray-500">标题</th>
+                            <th class="px-6 py-3 text-left text-sm font-medium text-gray-500">类型</th>
+                            <th class="px-6 py-3 text-left text-sm font-medium text-gray-500">作者</th>
+                            <th class="px-6 py-3 text-left text-sm font-medium text-gray-500">浏览/赞/回复</th>
+                            <th class="px-6 py-3 text-left text-sm font-medium text-gray-500">状态</th>
+                            <th class="px-6 py-3 text-left text-sm font-medium text-gray-500">发布时间</th>
+                            <th class="px-6 py-3 text-left text-sm font-medium text-gray-500">操作</th>
+                        </tr>
+                    </thead>
+                    <tbody id="postTable">
+                        <tr><td colspan="7" class="px-6 py-8 text-center text-gray-500">加载中...</td></tr>
+                    </tbody>
+                </table>
+            </div>
+
+            <!-- 详情弹窗 -->
+            <div id="detailModal" class="fixed inset-0 bg-black/50 hidden items-center justify-center z-50 p-4">
+                <div class="bg-white rounded-xl w-full max-w-2xl max-h-[80vh] overflow-hidden flex flex-col">
+                    <div class="p-6 border-b flex justify-between items-center">
+                        <h2 class="text-xl font-bold text-gray-800" id="modalTitle">帖子详情</h2>
+                        <button onclick="closeModal()" class="text-gray-400"><i class="ri-close-line text-2xl"></i></button>
+                    </div>
+                    <div class="p-6 overflow-auto flex-1" id="modalContent"></div>
+                </div>
+            </div>
+        </main>
+    </div>
+
+    <script>
+        async function loadPosts() {
+            const type = document.getElementById('typeFilter').value;
+            const url = type ? `/api/posts?type=${type}` : '/api/posts';
+            
+            const res = await fetch(url);
+            const posts = await res.json();
+            
+            const tbody = document.getElementById('postTable');
+            
+            if (posts.length === 0) {
+                tbody.innerHTML = '<tr><td colspan="7" class="px-6 py-8 text-center text-gray-500">暂无帖子</td></tr>';
+                return;
+            }
+            
+            tbody.innerHTML = posts.map(p => `
+                <tr class="border-b border-gray-50 hover:bg-gray-50">
+                    <td class="px-6 py-4">
+                        <p class="font-medium text-gray-800 truncate max-w-xs">${p.title}</p>
+                    </td>
+                    <td class="px-6 py-4">
+                        <span class="px-2 py-1 rounded text-xs ${p.type === 'discussion' ? 'bg-blue-100 text-blue-600' : 'bg-purple-100 text-purple-600'}">
+                            ${p.type === 'discussion' ? '技术交流' : '工具分享'}
+                        </span>
+                    </td>
+                    <td class="px-6 py-4 text-gray-600">${p.author}</td>
+                    <td class="px-6 py-4 text-sm text-gray-500">
+                        ${p.views} / ${p.likes} / ${p.replies}
+                    </td>
+                    <td class="px-6 py-4">
+                        ${p.is_pinned ? '<span class="px-2 py-1 bg-red-100 text-red-600 rounded text-xs">置顶</span>' : '-'}
+                    </td>
+                    <td class="px-6 py-4 text-sm text-gray-500">
+                        ${new Date(p.created_at).toLocaleDateString()}
+                    </td>
+                    <td class="px-6 py-4">
+                        <button onclick="viewPost('${p.id}')" class="text-blue-500 hover:text-blue-700 mr-3">
+                            <i class="ri-eye-line"></i>
+                        </button>
+                        <button onclick="pinPost('${p.id}')" class="text-yellow-500 hover:text-yellow-700 mr-3">
+                            <i class="ri-pushpin-line"></i>
+                        </button>
+                        <button onclick="deletePost('${p.id}')" class="text-red-500 hover:text-red-700">
+                            <i class="ri-delete-bin-line"></i>
+                        </button>
+                    </td>
+                </tr>
+            `).join('');
+        }
+
+        async function viewPost(postId) {
+            const res = await fetch(`/api/posts/${postId}`);
+            const post = await res.json();
+            
+            document.getElementById('modalTitle').textContent = post.title;
+            document.getElementById('modalContent').innerHTML = `
+                <div class="space-y-4">
+                    <div class="grid grid-cols-3 gap-4 p-4 bg-gray-50 rounded-lg">
+                        <div>
+                            <p class="text-sm text-gray-500">作者</p>
+                            <p class="font-medium">${post.author}</p>
+                        </div>
+                        <div>
+                            <p class="text-sm text-gray-500">类型</p>
+                            <p class="font-medium">${post.type === 'discussion' ? '技术交流' : '工具分享'}</p>
+                        </div>
+                        <div>
+                            <p class="text-sm text-gray-500">浏览/赞</p>
+                            <p class="font-medium">${post.views} / ${post.likes}</p>
+                        </div>
+                    </div>
+                    
+                    <div>
+                        <p class="text-sm text-gray-500 mb-2">内容</p>
+                        <div class="p-4 bg-gray-50 rounded-lg text-sm text-gray-700 whitespace-pre-wrap max-h-60 overflow-auto">
+                            ${post.content}
+                        </div>
+                    </div>
+                    
+                    ${post.replies.length > 0 ? `
+                        <div>
+                            <p class="text-sm text-gray-500 mb-2">回复 (${post.replies.length})</p>
+                            <div class="space-y-2 max-h-40 overflow-auto">
+                                ${post.replies.map(r => `
+                                    <div class="p-2 bg-gray-50 rounded text-sm">
+                                        <span class="font-medium">${r.author}</span>: ${r.content}
+                                    </div>
+                                `).join('')}
+                            </div>
+                        </div>
+                    ` : ''}
+                </div>
+            `;
+            
+            document.getElementById('detailModal').classList.remove('hidden');
+            document.getElementById('detailModal').classList.add('flex');
+        }
+
+        function closeModal() {
+            document.getElementById('detailModal').classList.add('hidden');
+            document.getElementById('detailModal').classList.remove('flex');
+        }
+
+        async function pinPost(postId) {
+            const res = await fetch(`/api/posts/${postId}/pin`, { method: 'POST' });
+            const data = await res.json();
+            
+            if (data.success) {
+                loadPosts();
+            }
+        }
+
+        async function deletePost(postId) {
+            if (!confirm('确定要删除这个帖子吗？')) return;
+            
+            const res = await fetch(`/api/posts/${postId}`, { method: 'DELETE' });
+            const data = await res.json();
+            
+            if (data.success) {
+                loadPosts();
+            }
+        }
+
+        loadPosts();
+    </script>
+</body>
+</html>
\ No newline at end of file
diff --git a/admin/templates/topics.html b/admin/templates/topics.html
new file mode 100644
index 0000000..d055797
--- /dev/null
+++ b/admin/templates/topics.html
@@ -0,0 +1,181 @@
+<!DOCTYPE html>
+<html lang="zh-CN">
+<head>
+    <meta charset="UTF-8">
+    <meta name="viewport" content="width=device-width, initial-scale=1.0">
+    <title>主题管理 - 论坛后台</title>
+    <script src="https://cdn.tailwindcss.com"></script>
+    <link href="https://cdn.jsdelivr.net/npm/remixicon@3.5.0/fonts/remixicon.css" rel="stylesheet">
+</head>
+<body class="bg-gray-50 min-h-screen">
+    <div class="flex">
+        <aside class="w-64 bg-slate-800 min-h-screen fixed left-0 top-0">
+            <div class="p-6">
+                <h1 class="text-white text-xl font-bold flex items-center gap-2">
+                    <i class="ri-code-s-slash-line text-2xl text-blue-400"></i>
+                    论坛后台
+                </h1>
+            </div>
+            <nav class="mt-6">
+                <a href="/" class="flex items-center gap-3 px-6 py-3 text-slate-300 hover:bg-slate-700 hover:text-white">
+                    <i class="ri-dashboard-line"></i><span>仪表盘</span>
+                </a>
+                <a href="/users" class="flex items-center gap-3 px-6 py-3 text-slate-300 hover:bg-slate-700 hover:text-white">
+                    <i class="ri-user-line"></i><span>用户管理</span>
+                </a>
+                <a href="/posts" class="flex items-center gap-3 px-6 py-3 text-slate-300 hover:bg-slate-700 hover:text-white">
+                    <i class="ri-file-text-line"></i><span>帖子管理</span>
+                </a>
+                <a href="/topics" class="flex items-center gap-3 px-6 py-3 bg-slate-700 text-white">
+                    <i class="ri-tools-line"></i><span>主题管理</span>
+                </a>
+            </nav>
+        </aside>
+
+        <main class="ml-64 flex-1 p-8">
+            <h1 class="text-2xl font-bold text-gray-800 mb-6">主题管理</h1>
+
+            <div class="bg-white rounded-xl shadow-sm border border-gray-100 overflow-hidden">
+                <table class="w-full">
+                    <thead class="bg-gray-50 border-b border-gray-100">
+                        <tr>
+                            <th class="px-6 py-3 text-left text-sm font-medium text-gray-500">主题</th>
+                            <th class="px-6 py-3 text-left text-sm font-medium text-gray-500">创建者</th>
+                            <th class="px-6 py-3 text-left text-sm font-medium text-gray-500">子主题</th>
+                            <th class="px-6 py-3 text-left text-sm font-medium text-gray-500">问题</th>
+                            <th class="px-6 py-3 text-left text-sm font-medium text-gray-500">关注</th>
+                            <th class="px-6 py-3 text-left text-sm font-medium text-gray-500">创建时间</th>
+                            <th class="px-6 py-3 text-left text-sm font-medium text-gray-500">操作</th>
+                        </tr>
+                    </thead>
+                    <tbody id="topicTable">
+                        <tr><td colspan="7" class="px-6 py-8 text-center text-gray-500">加载中...</td></tr>
+                    </tbody>
+                </table>
+            </div>
+
+            <!-- 详情弹窗 -->
+            <div id="detailModal" class="fixed inset-0 bg-black/50 hidden items-center justify-center z-50 p-4">
+                <div class="bg-white rounded-xl w-full max-w-2xl max-h-[80vh] overflow-hidden flex flex-col">
+                    <div class="p-6 border-b flex justify-between items-center">
+                        <h2 class="text-xl font-bold text-gray-800" id="modalTitle">主题详情</h2>
+                        <button onclick="closeModal()" class="text-gray-400"><i class="ri-close-line text-2xl"></i></button>
+                    </div>
+                    <div class="p-6 overflow-auto flex-1" id="modalContent"></div>
+                </div>
+            </div>
+        </main>
+    </div>
+
+    <script>
+        async function loadTopics() {
+            const res = await fetch('/api/topics');
+            const topics = await res.json();
+            
+            const tbody = document.getElementById('topicTable');
+            
+            if (topics.length === 0) {
+                tbody.innerHTML = '<tr><td colspan="7" class="px-6 py-8 text-center text-gray-500">暂无主题</td></tr>';
+                return;
+            }
+            
+            tbody.innerHTML = topics.map(t => `
+                <tr class="border-b border-gray-50 hover:bg-gray-50">
+                    <td class="px-6 py-4">
+                        <div class="flex items-center gap-2">
+                            <span class="text-2xl">${t.icon}</span>
+                            <span class="font-medium text-gray-800">${t.name}</span>
+                        </div>
+                    </td>
+                    <td class="px-6 py-4 text-gray-600">${t.author}</td>
+                    <td class="px-6 py-4">
+                        <span class="px-2 py-1 bg-blue-100 text-blue-700 rounded text-xs">${t.sub_topics_count}</span>
+                    </td>
+                    <td class="px-6 py-4">
+                        <span class="px-2 py-1 bg-green-100 text-green-700 rounded text-xs">${t.questions_count}</span>
+                    </td>
+                    <td class="px-6 py-4">
+                        <span class="px-2 py-1 bg-purple-100 text-purple-700 rounded text-xs">${t.followers_count}</span>
+                    </td>
+                    <td class="px-6 py-4 text-sm text-gray-500">
+                        ${new Date(t.created_at).toLocaleDateString()}
+                    </td>
+                    <td class="px-6 py-4">
+                        <button onclick="viewTopic('${t.id}')" class="text-blue-500 hover:text-blue-700 mr-3">
+                            <i class="ri-eye-line"></i>
+                        </button>
+                        <button onclick="deleteTopic('${t.id}')" class="text-red-500 hover:text-red-700">
+                            <i class="ri-delete-bin-line"></i>
+                        </button>
+                    </td>
+                </tr>
+            `).join('');
+        }
+
+        async function viewTopic(topicId) {
+            const res = await fetch(`/api/topics/${topicId}`);
+            const topic = await res.json();
+            
+            document.getElementById('modalTitle').textContent = topic.name;
+            document.getElementById('modalContent').innerHTML = `
+                <div class="space-y-4">
+                    <div class="p-4 bg-gray-50 rounded-lg">
+                        <p class="text-sm text-gray-500">描述</p>
+                        <p class="text-gray-800">${topic.description || '暂无描述'}</p>
+                    </div>
+                    
+                    <div class="grid grid-cols-3 gap-4">
+                        <div class="p-4 bg-blue-50 rounded-lg text-center">
+                            <div class="text-2xl font-bold text-blue-600">${topic.sub_topics.length}</div>
+                            <div class="text-sm text-gray-500">子主题</div>
+                        </div>
+                        <div class="p-4 bg-green-50 rounded-lg text-center">
+                            <div class="text-2xl font-bold text-green-600">${topic.questions.length}</div>
+                            <div class="text-sm text-gray-500">问题</div>
+                        </div>
+                        <div class="p-4 bg-purple-50 rounded-lg text-center">
+                            <div class="text-2xl font-bold text-purple-600">${topic.followers_count}</div>
+                            <div class="text-sm text-gray-500">关注</div>
+                        </div>
+                    </div>
+                    
+                    ${topic.questions.length > 0 ? `
+                        <div>
+                            <p class="text-sm text-gray-500 mb-2">最新问题</p>
+                            <div class="space-y-2 max-h-40 overflow-auto">
+                                ${topic.questions.slice(0, 5).map(q => `
+                                    <div class="p-2 bg-gray-50 rounded text-sm">
+                                        <p class="font-medium">${q.title}</p>
+                                        <p class="text-gray-500 text-xs">${q.answers.length} 回答</p>
+                                    </div>
+                                `).join('')}
+                            </div>
+                        </div>
+                    ` : ''}
+                </div>
+            `;
+            
+            document.getElementById('detailModal').classList.remove('hidden');
+            document.getElementById('detailModal').classList.add('flex');
+        }
+
+        function closeModal() {
+            document.getElementById('detailModal').classList.add('hidden');
+            document.getElementById('detailModal').classList.remove('flex');
+        }
+
+        async function deleteTopic(topicId) {
+            if (!confirm('确定要删除这个主题吗？')) return;
+            
+            const res = await fetch(`/api/topics/${topicId}`, { method: 'DELETE' });
+            const data = await res.json();
+            
+            if (data.success) {
+                loadTopics();
+            }
+        }
+
+        loadTopics();
+    </script>
+</body>
+</html>
\ No newline at end of file
diff --git a/admin/templates/users.html b/admin/templates/users.html
new file mode 100644
index 0000000..df2a2c1
--- /dev/null
+++ b/admin/templates/users.html
@@ -0,0 +1,110 @@
+<!DOCTYPE html>
+<html lang="zh-CN">
+<head>
+    <meta charset="UTF-8">
+    <meta name="viewport" content="width=device-width, initial-scale=1.0">
+    <title>用户管理 - 论坛后台</title>
+    <script src="https://cdn.tailwindcss.com"></script>
+    <link href="https://cdn.jsdelivr.net/npm/remixicon@3.5.0/fonts/remixicon.css" rel="stylesheet">
+</head>
+<body class="bg-gray-50 min-h-screen">
+    <div class="flex">
+        <aside class="w-64 bg-slate-800 min-h-screen fixed left-0 top-0">
+            <div class="p-6">
+                <h1 class="text-white text-xl font-bold flex items-center gap-2">
+                    <i class="ri-code-s-slash-line text-2xl text-blue-400"></i>
+                    论坛后台
+                </h1>
+            </div>
+            <nav class="mt-6">
+                <a href="/" class="flex items-center gap-3 px-6 py-3 text-slate-300 hover:bg-slate-700 hover:text-white">
+                    <i class="ri-dashboard-line"></i><span>仪表盘</span>
+                </a>
+                <a href="/users" class="flex items-center gap-3 px-6 py-3 bg-slate-700 text-white">
+                    <i class="ri-user-line"></i><span>用户管理</span>
+                </a>
+                <a href="/posts" class="flex items-center gap-3 px-6 py-3 text-slate-300 hover:bg-slate-700 hover:text-white">
+                    <i class="ri-file-text-line"></i><span>帖子管理</span>
+                </a>
+                <a href="/topics" class="flex items-center gap-3 px-6 py-3 text-slate-300 hover:bg-slate-700 hover:text-white">
+                    <i class="ri-tools-line"></i><span>主题管理</span>
+                </a>
+            </nav>
+        </aside>
+
+        <main class="ml-64 flex-1 p-8">
+            <h1 class="text-2xl font-bold text-gray-800 mb-6">用户管理</h1>
+
+            <div class="bg-white rounded-xl shadow-sm border border-gray-100 overflow-hidden">
+                <table class="w-full">
+                    <thead class="bg-gray-50 border-b border-gray-100">
+                        <tr>
+                            <th class="px-6 py-3 text-left text-sm font-medium text-gray-500">用户名</th>
+                            <th class="px-6 py-3 text-left text-sm font-medium text-gray-500">邮箱</th>
+                            <th class="px-6 py-3 text-left text-sm font-medium text-gray-500">手机</th>
+                            <th class="px-6 py-3 text-left text-sm font-medium text-gray-500">帖子数</th>
+                            <th class="px-6 py-3 text-left text-sm font-medium text-gray-500">回复数</th>
+                            <th class="px-6 py-3 text-left text-sm font-medium text-gray-500">注册时间</th>
+                            <th class="px-6 py-3 text-left text-sm font-medium text-gray-500">操作</th>
+                        </tr>
+                    </thead>
+                    <tbody id="userTable">
+                        <tr><td colspan="7" class="px-6 py-8 text-center text-gray-500">加载中...</td></tr>
+                    </tbody>
+                </table>
+            </div>
+        </main>
+    </div>
+
+    <script>
+        async function loadUsers() {
+            const res = await fetch('/api/users');
+            const users = await res.json();
+            
+            const tbody = document.getElementById('userTable');
+            
+            if (users.length === 0) {
+                tbody.innerHTML = '<tr><td colspan="7" class="px-6 py-8 text-center text-gray-500">暂无用户</td></tr>';
+                return;
+            }
+            
+            tbody.innerHTML = users.map(u => `
+                <tr class="border-b border-gray-50 hover:bg-gray-50">
+                    <td class="px-6 py-4 font-medium text-gray-800">${u.username}</td>
+                    <td class="px-6 py-4 text-gray-600">${u.email || '-'}</td>
+                    <td class="px-6 py-4 text-gray-600">${u.phone || '-'}</td>
+                    <td class="px-6 py-4">
+                        <span class="px-2 py-1 bg-blue-100 text-blue-700 rounded text-xs">${u.posts_count}</span>
+                    </td>
+                    <td class="px-6 py-4">
+                        <span class="px-2 py-1 bg-green-100 text-green-700 rounded text-xs">${u.replies_count}</span>
+                    </td>
+                    <td class="px-6 py-4 text-sm text-gray-500">
+                        ${u.created_at ? new Date(u.created_at).toLocaleString() : '-'}
+                    </td>
+                    <td class="px-6 py-4">
+                        <button onclick="deleteUser('${u.id}')" class="text-red-500 hover:text-red-700">
+                            <i class="ri-delete-bin-line"></i> 删除
+                        </button>
+                    </td>
+                </tr>
+            `).join('');
+        }
+
+        async function deleteUser(userId) {
+            if (!confirm('确定要删除这个用户吗？这将同时删除该用户的所有帖子！')) return;
+            
+            const res = await fetch(`/api/users/${userId}`, { method: 'DELETE' });
+            const data = await res.json();
+            
+            if (data.success) {
+                loadUsers();
+            } else {
+                alert('删除失败');
+            }
+        }
+
+        loadUsers();
+    </script>
+</body>
+</html>
\ No newline at end of file