commit d75163b2b44f4a1436bc0ed905a31ad73e7b3876
Author: Snowz <372492339@qq.com>
Date:   Mon May 26 15:23:18 2025 +0800

    first commit

diff --git a/.htaccess b/.htaccess
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+# Apache配置文件
+# 用于URL重写和安全设置
+
+# 启用重写引擎
+RewriteEngine On
+
+# URL重写规则
+RewriteCond %{REQUEST_FILENAME} !-f
+RewriteCond %{REQUEST_FILENAME} !-d
+RewriteRule ^(.*)$ index.php [QSA,L]
+
+# 安全设置 - 禁止访问敏感目录
+<Files "config/*">
+    Order Allow,Deny
+    Deny from all
+</Files>
+
+<Files "includes/*">
+    Order Allow,Deny
+    Deny from all
+</Files>
+
+<Files "data/*">
+    Order Allow,Deny
+    Deny from all
+</Files>
+
+# 禁止访问敏感文件
+<FilesMatch "\.(sql|log|md|txt|conf)$">
+    Order Allow,Deny
+    Deny from all
+</FilesMatch>
+
+# 禁止访问隐藏文件
+<FilesMatch "^\.*">
+    Order Allow,Deny
+    Deny from all
+</FilesMatch>
+
+# 禁止访问安装文件（安装完成后）
+<Files "install.php">
+    Order Allow,Deny
+    Deny from all
+</Files>
+
+# 设置默认字符集
+AddDefaultCharset UTF-8
+
+# 启用GZIP压缩
+<IfModule mod_deflate.c>
+    AddOutputFilterByType DEFLATE text/plain
+    AddOutputFilterByType DEFLATE text/html
+    AddOutputFilterByType DEFLATE text/xml
+    AddOutputFilterByType DEFLATE text/css
+    AddOutputFilterByType DEFLATE application/xml
+    AddOutputFilterByType DEFLATE application/xhtml+xml
+    AddOutputFilterByType DEFLATE application/rss+xml
+    AddOutputFilterByType DEFLATE application/javascript
+    AddOutputFilterByType DEFLATE application/x-javascript
+</IfModule>
+
+# 设置缓存策略
+<IfModule mod_expires.c>
+    ExpiresActive On
+    ExpiresByType text/css "access plus 1 month"
+    ExpiresByType application/javascript "access plus 1 month"
+    ExpiresByType image/png "access plus 1 month"
+    ExpiresByType image/jpg "access plus 1 month"
+    ExpiresByType image/jpeg "access plus 1 month"
+    ExpiresByType image/gif "access plus 1 month"
+    ExpiresByType image/ico "access plus 1 month"
+    ExpiresByType image/icon "access plus 1 month"
+    ExpiresByType text/plain "access plus 1 month"
+    ExpiresByType application/pdf "access plus 1 month"
+</IfModule>
+
+# 安全头设置
+<IfModule mod_headers.c>
+    Header always set X-Content-Type-Options nosniff
+    Header always set X-Frame-Options DENY
+    Header always set X-XSS-Protection "1; mode=block"
+    Header always set Referrer-Policy "strict-origin-when-cross-origin"
+</IfModule>
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diff --git a/DEPLOY.md b/DEPLOY.md
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+# 宝塔面板部署指南
+
+本文档详细介绍如何在宝塔面板中部署内容投稿系统。
+
+## 📋 部署前准备
+
+### 服务器要求
+- 操作系统：Linux（推荐CentOS 7+/Ubuntu 18+）
+- 内存：至少512MB（推荐1GB+）
+- 硬盘：至少1GB可用空间
+- 网络：稳定的互联网连接
+
+### 宝塔面板要求
+- 宝塔面板版本：7.0+
+- PHP版本：7.4+
+- Web服务器：Apache或Nginx
+- 数据库：MySQL 5.7+（可选，也可使用SQLite）
+
+## 🚀 详细部署步骤
+
+### 第一步：安装宝塔面板
+
+如果还未安装宝塔面板，请先安装：
+
+```bash
+# CentOS安装命令
+yum install -y wget && wget -O install.sh http://download.bt.cn/install/install_6.0.sh && sh install.sh
+
+# Ubuntu安装命令
+wget -O install.sh http://download.bt.cn/install/install-ubuntu_6.0.sh && sudo bash install.sh
+```
+
+### 第二步：配置服务器环境
+
+1. **登录宝塔面板**
+   - 访问 `http://服务器IP:8888`
+   - 使用安装时显示的用户名和密码登录
+
+2. **安装LNMP/LAMP环境**
+   - 选择"软件商店" → "一键部署"
+   - 推荐安装：Nginx 1.20+ + MySQL 5.7+ + PHP 7.4+
+   - 等待安装完成（约10-30分钟）
+
+3. **安装PHP扩展**
+   - 进入"软件商店" → "已安装"
+   - 找到PHP，点击"设置"
+   - 在"安装扩展"中安装以下扩展：
+     - `pdo_mysql`（MySQL支持）
+     - `pdo_sqlite`（SQLite支持）
+     - `gd`（图像处理）
+     - `curl`（网络请求）
+     - `fileinfo`（文件信息）
+
+### 第三步：创建网站
+
+1. **添加站点**
+   - 点击"网站" → "添加站点"
+   - 域名：填入你的域名（如：example.com）
+   - 根目录：默认即可
+   - PHP版本：选择7.4或更高版本
+   - 数据库：选择MySQL（可选）
+   - 点击"提交"
+
+2. **配置域名解析**
+   - 在域名服务商处添加A记录
+   - 将域名指向服务器IP地址
+
+### 第四步：上传项目文件
+
+1. **下载项目**
+   - 方式一：直接上传压缩包
+     - 将项目打包为zip文件
+     - 在宝塔面板"文件"中上传到网站根目录
+     - 解压文件
+   
+   - 方式二：使用Git（推荐）
+     - 在"终端"中执行：
+     ```bash
+     cd /www/wwwroot/your-domain.com
+     git clone https://github.com/your-repo/submission-system.git .
+     ```
+
+2. **设置文件权限**
+   - 在"文件"管理中，选择网站根目录
+   - 右键选择"权限"，设置为755
+   - 特别设置以下目录权限为777：
+     - `config/`
+     - `data/`
+
+### 第五步：配置数据库（MySQL方式）
+
+1. **创建数据库**
+   - 点击"数据库" → "添加数据库"
+   - 数据库名：`submission_system`
+   - 用户名：自定义
+   - 密码：自动生成或自定义
+   - 记录数据库信息
+
+2. **配置数据库连接**
+   - 编辑 `config/database.php`
+   - 填入正确的数据库信息
+
+### 第六步：运行安装向导
+
+1. **访问安装页面**
+   - 浏览器访问：`http://your-domain.com/install.php`
+
+2. **环境检查**
+   - 系统会自动检查服务器环境
+   - 确保所有检查项都通过
+
+3. **数据库配置**
+   - 选择数据库类型（MySQL或SQLite）
+   - 填入数据库连接信息
+   - 测试连接
+
+4. **初始化数据库**
+   - 点击"初始化数据库"
+   - 等待数据表创建完成
+
+5. **完成安装**
+   - 记录默认管理员账户信息
+   - 删除或重命名 `install.php` 文件
+
+### 第七步：安全配置
+
+1. **SSL证书配置**
+   - 在"网站"中找到你的站点
+   - 点击"设置" → "SSL"
+   - 申请Let's Encrypt免费证书
+   - 开启"强制HTTPS"
+
+2. **防火墙设置**
+   - 在"安全"中配置防火墙
+   - 开放80、443端口
+   - 关闭不必要的端口
+
+3. **文件安全**
+   - 删除 `install.php`
+   - 检查敏感文件权限
+   - 定期备份数据
+
+## 🔧 高级配置
+
+### Nginx配置优化
+
+在网站设置中添加以下Nginx配置：
+
+```nginx
+# 安全设置
+location ~ ^/(config|includes|data)/ {
+    deny all;
+}
+
+# 禁止访问敏感文件
+location ~* \.(sql|log|md|txt|conf)$ {
+    deny all;
+}
+
+# 隐藏文件
+location ~ /\. {
+    deny all;
+}
+
+# PHP配置
+location ~ \.php$ {
+    fastcgi_pass unix:/tmp/php-cgi-74.sock;
+    fastcgi_index index.php;
+    fastcgi_param SCRIPT_FILENAME $document_root$fastcgi_script_name;
+    include fastcgi_params;
+}
+
+# 静态文件缓存
+location ~* \.(css|js|png|jpg|jpeg|gif|ico|svg)$ {
+    expires 30d;
+    add_header Cache-Control "public, immutable";
+}
+```
+
+### PHP配置优化
+
+在PHP设置中调整以下参数：
+
+```ini
+; 上传限制
+upload_max_filesize = 10M
+post_max_size = 10M
+
+; 执行时间
+max_execution_time = 60
+
+; 内存限制
+memory_limit = 256M
+
+; 错误报告
+display_errors = Off
+log_errors = On
+
+; 会话配置
+session.cookie_httponly = On
+session.cookie_secure = On
+```
+
+### 定时任务配置
+
+可以设置定时任务来清理过期数据：
+
+```bash
+# 每天凌晨2点清理7天前的IP记录
+0 2 * * * /usr/bin/php /www/wwwroot/your-domain.com/cleanup.php
+```
+
+## 📊 性能优化
+
+### 数据库优化
+
+1. **索引优化**
+   ```sql
+   -- 为常用查询字段添加索引
+   ALTER TABLE website_submissions ADD INDEX idx_status (status);
+   ALTER TABLE website_submissions ADD INDEX idx_created (created_at);
+   ALTER TABLE app_submissions ADD INDEX idx_status (status);
+   ALTER TABLE app_submissions ADD INDEX idx_created (created_at);
+   ```
+
+2. **定期清理**
+   - 定期清理过期的IP限制记录
+   - 归档或删除过旧的投稿记录
+
+### 缓存配置
+
+1. **开启OPcache**
+   - 在PHP设置中开启OPcache扩展
+   - 提高PHP执行效率
+
+2. **静态文件CDN**
+   - 将CSS、JS等静态文件上传到CDN
+   - 加速页面加载速度
+
+## 🔍 故障排除
+
+### 常见问题解决
+
+1. **500错误**
+   - 检查PHP错误日志
+   - 确认文件权限设置
+   - 检查.htaccess配置
+
+2. **数据库连接失败**
+   - 验证数据库配置信息
+   - 检查数据库服务状态
+   - 确认防火墙设置
+
+3. **验证码不显示**
+   - 检查GD扩展是否安装
+   - 确认PHP图像处理功能
+
+4. **无法获取网站信息**
+   - 检查cURL扩展
+   - 确认服务器网络连接
+   - 检查目标网站可访问性
+
+### 日志查看
+
+- **PHP错误日志**：`/www/wwwroot/your-domain.com/php_errors.log`
+- **Nginx访问日志**：`/www/wwwroot/your-domain.com/log/access.log`
+- **Nginx错误日志**：`/www/wwwroot/your-domain.com/log/error.log`
+
+## 📈 监控与维护
+
+### 定期维护任务
+
+1. **系统更新**
+   - 定期更新宝塔面板
+   - 更新PHP、MySQL版本
+   - 更新系统安全补丁
+
+2. **数据备份**
+   - 设置自动数据库备份
+   - 定期下载备份文件
+   - 测试备份恢复流程
+
+3. **安全检查**
+   - 检查异常访问日志
+   - 更新管理员密码
+   - 检查文件完整性
+
+### 性能监控
+
+- 使用宝塔面板的监控功能
+- 关注CPU、内存、磁盘使用率
+- 监控网站访问速度
+
+## 📞 技术支持
+
+如果在部署过程中遇到问题：
+
+1. 查看本文档的故障排除部分
+2. 检查项目的GitHub Issues
+3. 联系技术支持
+
+---
+
+**祝您部署顺利！如有问题，欢迎反馈。**
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diff --git a/LICENSE b/LICENSE
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+MIT License
+
+Copyright (c) 2024 Content Submission System
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in all
+copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+SOFTWARE.
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diff --git a/README.md b/README.md
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+# 内容投稿系统
+
+一个轻量级、易部署的内容投稿管理系统，支持网址和APP/软件投稿，具有完善的后台审核功能。
+
+## ✨ 功能特性
+
+### 前端功能
+- 🌐 **网址投稿**：自动获取网站TDK信息（标题、描述、关键词）
+- 📱 **APP/软件投稿**：支持多平台应用投稿
+- 🎯 **多平台收录**：支持自媒体维基、zTab、SOSO平台选择
+- 🔒 **IP限制**：每IP每日最多提交3次
+- 🚫 **重复检测**：智能检测重复内容
+- 📱 **响应式设计**：完美适配移动端和桌面端
+
+### 后端功能
+- 👨‍💼 **管理后台**：完善的内容审核管理
+- 🔐 **安全登录**：验证码保护，防暴力破解
+- 📊 **数据统计**：实时查看投稿统计数据
+- ✅ **状态管理**：待处理、已通过、已拒绝状态管理
+- 👤 **账户管理**：支持修改管理员用户名和密码
+- 🗂️ **分类管理**：网址和APP投稿分开管理
+
+### 技术特性
+- 🗄️ **双数据库支持**：MySQL和SQLite可选
+- 🚀 **轻量化设计**：纯PHP开发，无复杂依赖
+- 🎨 **现代化UI**：参考大厂设计风格
+- 📦 **易于部署**：支持宝塔面板一键部署
+- 🔧 **安装向导**：图形化安装配置
+
+## 🛠️ 环境要求
+
+- PHP >= 7.4
+- PDO扩展
+- PDO MySQL扩展（必须使用MySQL或MariaDB）
+- GD扩展（验证码功能）
+- cURL扩展（网站信息抓取）
+
+## 📦 安装部署
+
+### 方式一：宝塔面板部署（推荐）
+
+1. **下载源码**
+   ```bash
+   # 在宝塔面板文件管理中，进入网站根目录
+   # 上传项目文件或使用Git克隆
+   git clone https://github.com/your-repo/submission-system.git
+   ```
+
+2. **设置网站**
+   - 在宝塔面板中创建新网站
+   - 设置运行目录为项目根目录
+   - PHP版本选择7.4或以上
+
+3. **配置数据库**
+   - 在宝塔面板中创建MySQL数据库
+   - 记录数据库名、用户名、密码
+
+4. **设置文件权限**
+   ```bash
+   chmod 755 -R /www/wwwroot/your-domain/
+   chmod 777 /www/wwwroot/your-domain/config/
+   chmod 777 /www/wwwroot/your-domain/data/
+   ```
+
+5. **运行安装向导**
+   - 访问 `http://your-domain/install.php`
+   - 按照向导完成安装配置
+
+6. **安全设置**
+   - 安装完成后删除或重命名 `install.php`
+   - 登录后台修改默认密码
+
+### 方式二：手动部署
+
+1. **上传文件**
+   - 将所有文件上传到Web服务器根目录
+
+2. **配置Web服务器**
+   
+   **Apache配置**（.htaccess）：
+   ```apache
+   RewriteEngine On
+   RewriteCond %{REQUEST_FILENAME} !-f
+   RewriteCond %{REQUEST_FILENAME} !-d
+   RewriteRule ^(.*)$ index.php [QSA,L]
+   
+   # 安全设置
+   <Files "config/*">
+       Order Allow,Deny
+       Deny from all
+   </Files>
+   ```
+   
+   **Nginx配置**：
+   ```nginx
+   server {
+       listen 80;
+       server_name your-domain.com;
+       root /path/to/submission-system;
+       index index.php;
+       
+       location / {
+           try_files $uri $uri/ /index.php?$query_string;
+       }
+       
+       location ~ \.php$ {
+           fastcgi_pass 127.0.0.1:9000;
+           fastcgi_index index.php;
+           fastcgi_param SCRIPT_FILENAME $document_root$fastcgi_script_name;
+           include fastcgi_params;
+       }
+       
+       # 安全设置
+       location ~ ^/config/ {
+           deny all;
+       }
+   }
+   ```
+
+3. **设置权限**
+   ```bash
+   chmod 755 -R /path/to/submission-system/
+   chmod 777 /path/to/submission-system/config/
+   chmod 777 /path/to/submission-system/data/
+   ```
+
+4. **运行安装**
+   - 访问安装向导完成配置
+
+## 🎯 使用说明
+
+### 前台投稿
+
+1. **网址投稿**
+   - 输入网址URL（支持http/https）
+   - 点击"获取信息"自动填充网站信息
+   - 选择收录平台
+   - 填写联系方式（可选）
+   - 提交投稿
+
+2. **APP投稿**
+   - 切换到"APP/软件投稿"标签
+   - 填写应用名称、平台、版本等信息
+   - 提供图标地址、下载链接、官网地址
+   - 选择收录平台并提交
+
+### 后台管理
+
+1. **登录后台**
+   - 访问 `/admin/login.php`
+   - 默认账户：admin/admin
+   - 输入验证码登录
+
+2. **内容审核**
+   - 查看待处理的投稿内容
+   - 切换查看网址投稿和APP投稿
+   - 批量或单个审核通过/拒绝
+   - 添加审核备注
+
+3. **账户管理**
+   - 点击"账户设置"修改用户名和密码
+   - 建议首次登录后立即修改默认密码
+
+## 🔧 配置说明
+
+### 数据库配置
+
+编辑 `config/database.php`：
+
+```php
+// MySQL配置
+private $host = 'localhost';
+private $db_name = 'submission_system';
+private $username = 'root';
+private $password = '';
+```
+
+### 功能配置
+
+- **IP限制**：在 `includes/utils.php` 中修改每日提交次数限制
+- **验证码**：可在 `admin/captcha.php` 中自定义验证码样式
+- **平台选项**：在前端页面中修改收录平台选项
+
+## 📁 目录结构
+
+```
+submission-system/
+├── admin/                  # 后台管理
+│   ├── index.php          # 管理主页
+│   ├── login.php          # 登录页面
+│   ├── logout.php         # 退出登录
+│   └── captcha.php        # 验证码生成
+├── api/                   # API接口
+│   └── fetch_website_info.php  # 获取网站信息
+├── config/                # 配置文件
+│   └── database.php       # 数据库配置
+├── includes/              # 核心文件
+│   └── utils.php          # 工具类
+├── data/                  # 数据目录（SQLite）
+├── index.php              # 前台主页
+├── install.php            # 安装向导
+├── README.md              # 说明文档
+└── LICENSE                # 开源协议
+```
+
+## 🔒 安全建议
+
+1. **修改默认密码**：首次登录后立即修改admin账户密码
+2. **删除安装文件**：安装完成后删除 `install.php`
+3. **设置文件权限**：确保配置文件不可通过Web访问
+4. **定期备份**：定期备份数据库和配置文件
+5. **更新维护**：及时更新PHP版本和扩展
+
+## 🐛 常见问题
+
+### Q: 无法获取网站信息？
+A: 检查服务器是否支持cURL扩展，确保目标网站可访问。
+
+### Q: 验证码不显示？
+A: 检查GD扩展是否安装，确保PHP支持图像处理。
+
+### Q: 数据库连接失败？
+A: 检查数据库配置信息，确保数据库服务正常运行。
+
+### Q: 文件上传权限错误？
+A: 检查目录权限设置，确保Web服务器有写入权限。
+
+### Q: 页面样式异常？
+A: 检查CDN资源是否正常加载，可考虑本地化CSS/JS文件。
+
+## 🤝 贡献指南
+
+欢迎提交Issue和Pull Request来改进项目！
+
+1. Fork 项目
+2. 创建功能分支 (`git checkout -b feature/AmazingFeature`)
+3. 提交更改 (`git commit -m 'Add some AmazingFeature'`)
+4. 推送到分支 (`git push origin feature/AmazingFeature`)
+5. 开启 Pull Request
+
+## 📄 开源协议
+
+本项目采用 MIT 协议开源，详见 [LICENSE](LICENSE) 文件。
+
+## 🙏 致谢
+
+- 感谢所有为开源社区做出贡献的开发者
+- 特别感谢提供设计灵感的各大互联网公司
+- 感谢使用本系统的每一位用户
+
+## 📞 联系方式
+
+如有问题或建议，欢迎通过以下方式联系：
+
+- 提交 Issue
+- 发送邮件
+- 加入讨论群
+
+---
+
+**⭐ 如果这个项目对你有帮助，请给个Star支持一下！**
\ No newline at end of file
diff --git a/admin/arial.ttf b/admin/arial.ttf
new file mode 100644
index 0000000..12cc15c
Binary files /dev/null and b/admin/arial.ttf differ
diff --git a/admin/captcha.php b/admin/captcha.php
new file mode 100644
index 0000000..b4780a3
--- /dev/null
+++ b/admin/captcha.php
@@ -0,0 +1,60 @@
+<?php
+session_start();
+
+// 生成验证码
+$code = '';
+$chars = 'ABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789';
+for ($i = 0; $i < 4; $i++) {
+    $code .= $chars[rand(0, strlen($chars) - 1)];
+}
+
+$_SESSION['captcha'] = $code;
+
+// 创建图片
+$width = 100;
+$height = 40;
+$image = imagecreate($width, $height);
+
+// 颜色定义
+$bg_color = imagecolorallocate($image, 245, 245, 245);
+$text_color = imagecolorallocate($image, 50, 50, 50);
+$line_color = imagecolorallocate($image, 200, 200, 200);
+$noise_color = imagecolorallocate($image, 180, 180, 180);
+
+// 填充背景
+imagefill($image, 0, 0, $bg_color);
+
+// 添加干扰线
+for ($i = 0; $i < 5; $i++) {
+    imageline($image, rand(0, $width), rand(0, $height), rand(0, $width), rand(0, $height), $line_color);
+}
+
+// 添加噪点
+for ($i = 0; $i < 50; $i++) {
+    imagesetpixel($image, rand(0, $width), rand(0, $height), $noise_color);
+}
+
+// 添加验证码文字
+for ($i = 0; $i < 4; $i++) {
+    $x = 15 + $i * 18;
+    $y = rand(8, 15);
+    $angle = rand(-15, 15);
+    
+    if (function_exists('imagettftext')) {
+        // 如果支持TTF字体
+        imagettftext($image, 16, $angle, $x, 25, $text_color, __DIR__ . '/arial.ttf', $code[$i]);
+    } else {
+        // 使用内置字体
+        imagestring($image, 5, $x, $y, $code[$i], $text_color);
+    }
+}
+
+// 输出图片
+header('Content-Type: image/png');
+header('Cache-Control: no-cache, no-store, must-revalidate');
+header('Pragma: no-cache');
+header('Expires: 0');
+
+imagepng($image);
+imagedestroy($image);
+?>
\ No newline at end of file
diff --git a/admin/index.php b/admin/index.php
new file mode 100644
index 0000000..9051119
--- /dev/null
+++ b/admin/index.php
@@ -0,0 +1,750 @@
+<?php
+session_start();
+
+// 检查登录状态
+if (!isset($_SESSION['admin_logged_in']) || !$_SESSION['admin_logged_in']) {
+    header('Location: login.php');
+    exit;
+}
+
+require_once '../config/database.php';
+require_once '../includes/utils.php';
+
+$database = new Database();
+$db = $database->getConnection();
+
+$message = '';
+$message_type = '';
+
+// 处理操作
+if ($_SERVER['REQUEST_METHOD'] === 'POST') {
+    $action = $_POST['action'] ?? '';
+    
+    if ($action === 'update_status') {
+        $type = $_POST['type'] ?? '';
+        $id = $_POST['id'] ?? '';
+        $status = $_POST['status'] ?? '';
+        $note = $_POST['note'] ?? '';
+        
+        if ($type === 'website') {
+            $stmt = $db->prepare("UPDATE website_submissions SET status = ?, admin_note = ? WHERE id = ?");
+        } else {
+            $stmt = $db->prepare("UPDATE app_submissions SET status = ?, admin_note = ? WHERE id = ?");
+        }
+        
+        if ($stmt->execute([$status, $note, $id])) {
+            $message = '状态更新成功';
+            $message_type = 'success';
+        } else {
+            $message = '状态更新失败';
+            $message_type = 'error';
+        }
+    } elseif ($action === 'update_account') {
+        $new_username = trim($_POST['new_username'] ?? '');
+        $new_password = $_POST['new_password'] ?? '';
+        $confirm_password = $_POST['confirm_password'] ?? '';
+        
+        if (empty($new_username)) {
+            $message = '用户名不能为空';
+            $message_type = 'error';
+        } elseif (!empty($new_password) && $new_password !== $confirm_password) {
+            $message = '两次输入的密码不一致';
+            $message_type = 'error';
+        } else {
+            $admin_id = $_SESSION['admin_id'];
+            
+            if (!empty($new_password)) {
+                $hashed_password = password_hash($new_password, PASSWORD_DEFAULT);
+                $stmt = $db->prepare("UPDATE admins SET username = ?, password = ? WHERE id = ?");
+                $stmt->execute([$new_username, $hashed_password, $admin_id]);
+            } else {
+                $stmt = $db->prepare("UPDATE admins SET username = ? WHERE id = ?");
+                $stmt->execute([$new_username, $admin_id]);
+            }
+            
+            $_SESSION['admin_username'] = $new_username;
+            $message = '账户信息更新成功';
+            $message_type = 'success';
+        }
+    }
+}
+
+// 获取统计数据
+$stats = [
+    'website_pending' => 0,
+    'website_approved' => 0,
+    'website_rejected' => 0,
+    'app_pending' => 0,
+    'app_approved' => 0,
+    'app_rejected' => 0
+];
+
+$stmt = $db->prepare("SELECT status, COUNT(*) as count FROM website_submissions GROUP BY status");
+$stmt->execute();
+while ($row = $stmt->fetch()) {
+    $stats['website_' . $row['status']] = $row['count'];
+}
+
+$stmt = $db->prepare("SELECT status, COUNT(*) as count FROM app_submissions GROUP BY status");
+$stmt->execute();
+while ($row = $stmt->fetch()) {
+    $stats['app_' . $row['status']] = $row['count'];
+}
+
+// 获取列表数据
+$filter = $_GET['filter'] ?? 'pending';
+$type = $_GET['type'] ?? 'website';
+$page = max(1, intval($_GET['page'] ?? 1));
+$limit = 10;
+$offset = ($page - 1) * $limit;
+
+// 强制转换为整数
+$limit = (int)$limit;
+$offset = (int)$offset;
+
+if ($type === 'website') {
+    $count_stmt = $db->prepare("SELECT COUNT(*) FROM website_submissions WHERE status = ?");
+    $count_stmt->execute([$filter]);
+    $total = $count_stmt->fetchColumn();
+    
+    $stmt = $db->prepare("
+        SELECT id, url, title, description, platforms, contact, status, admin_note, created_at 
+        FROM website_submissions 
+        WHERE status = ? 
+        ORDER BY created_at DESC 
+        LIMIT ?, ?
+    ");
+    $stmt->bindValue(1, $filter, PDO::PARAM_STR);
+    $stmt->bindValue(2, $offset, PDO::PARAM_INT);
+    $stmt->bindValue(3, $limit, PDO::PARAM_INT);
+    $stmt->execute();
+} else {
+    $count_stmt = $db->prepare("SELECT COUNT(*) FROM app_submissions WHERE status = ?");
+    $count_stmt->execute([$filter]);
+    $total = $count_stmt->fetchColumn();
+    
+    $stmt = $db->prepare("
+        SELECT id, name, platform, version, icon_url, download_url, website_url, description, platforms, contact, status, admin_note, created_at 
+        FROM app_submissions 
+        WHERE status = ? 
+        ORDER BY created_at DESC 
+        LIMIT ?, ?
+    ");
+    $stmt->bindValue(1, $filter, PDO::PARAM_STR);
+    $stmt->bindValue(2, $offset, PDO::PARAM_INT);
+    $stmt->bindValue(3, $limit, PDO::PARAM_INT);
+    $stmt->execute();
+}
+
+$submissions = $stmt->fetchAll();
+$total_pages = ceil($total / $limit);
+?>
+
+<!DOCTYPE html>
+<html lang="zh-CN">
+<head>
+    <meta charset="UTF-8">
+    <meta name="viewport" content="width=device-width, initial-scale=1.0">
+    <title>管理后台 - 内容投稿系统</title>
+    <link href="https://cdnjs.cloudflare.com/ajax/libs/font-awesome/6.0.0/css/all.min.css" rel="stylesheet">
+    <style>
+        * {
+            margin: 0;
+            padding: 0;
+            box-sizing: border-box;
+        }
+        
+        body {
+            font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
+            background: #f8fafc;
+            color: #1a202c;
+        }
+        
+        .header {
+            background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
+            color: white;
+            padding: 20px 0;
+            box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
+        }
+        
+        .header-content {
+            max-width: 1200px;
+            margin: 0 auto;
+            padding: 0 20px;
+            display: flex;
+            justify-content: space-between;
+            align-items: center;
+        }
+        
+        .header h1 {
+            font-size: 1.5rem;
+            font-weight: 700;
+        }
+        
+        .header-actions {
+            display: flex;
+            gap: 15px;
+            align-items: center;
+        }
+        
+        .btn {
+            padding: 8px 16px;
+            border: none;
+            border-radius: 6px;
+            font-size: 14px;
+            font-weight: 500;
+            cursor: pointer;
+            transition: all 0.3s ease;
+            text-decoration: none;
+            display: inline-flex;
+            align-items: center;
+            gap: 6px;
+        }
+        
+        .btn-primary {
+            background: rgba(255, 255, 255, 0.2);
+            color: white;
+            border: 1px solid rgba(255, 255, 255, 0.3);
+        }
+        
+        .btn-primary:hover {
+            background: rgba(255, 255, 255, 0.3);
+        }
+        
+        .btn-danger {
+            background: #ef4444;
+            color: white;
+        }
+        
+        .btn-danger:hover {
+            background: #dc2626;
+        }
+        
+        .container {
+            max-width: 1200px;
+            margin: 0 auto;
+            padding: 30px 20px;
+        }
+        
+        .stats-grid {
+            display: grid;
+            grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
+            gap: 20px;
+            margin-bottom: 30px;
+        }
+        
+        .stat-card {
+            background: white;
+            padding: 25px;
+            border-radius: 12px;
+            box-shadow: 0 2px 10px rgba(0, 0, 0, 0.05);
+            border-left: 4px solid #667eea;
+        }
+        
+        .stat-card h3 {
+            font-size: 2rem;
+            font-weight: 700;
+            color: #667eea;
+            margin-bottom: 5px;
+        }
+        
+        .stat-card p {
+            color: #64748b;
+            font-size: 14px;
+        }
+        
+        .controls {
+            background: white;
+            padding: 20px;
+            border-radius: 12px;
+            box-shadow: 0 2px 10px rgba(0, 0, 0, 0.05);
+            margin-bottom: 20px;
+            display: flex;
+            gap: 15px;
+            align-items: center;
+            flex-wrap: wrap;
+        }
+        
+        .controls select {
+            padding: 8px 12px;
+            border: 2px solid #e2e8f0;
+            border-radius: 6px;
+            font-size: 14px;
+        }
+        
+        .submissions-table {
+            background: white;
+            border-radius: 12px;
+            box-shadow: 0 2px 10px rgba(0, 0, 0, 0.05);
+            overflow: hidden;
+        }
+        
+        .table {
+            width: 100%;
+            border-collapse: collapse;
+        }
+        
+        .table th,
+        .table td {
+            padding: 15px;
+            text-align: left;
+            border-bottom: 1px solid #e2e8f0;
+        }
+        
+        .table th {
+            background: #f8fafc;
+            font-weight: 600;
+            color: #374151;
+        }
+        
+        .table tr:hover {
+            background: #f8fafc;
+        }
+        
+        .status-badge {
+            padding: 4px 8px;
+            border-radius: 4px;
+            font-size: 12px;
+            font-weight: 500;
+        }
+        
+        .status-pending {
+            background: #fef3c7;
+            color: #92400e;
+        }
+        
+        .status-approved {
+            background: #d1fae5;
+            color: #065f46;
+        }
+        
+        .status-rejected {
+            background: #fee2e2;
+            color: #991b1b;
+        }
+        
+        .action-buttons {
+            display: flex;
+            gap: 5px;
+        }
+        
+        .btn-sm {
+            padding: 4px 8px;
+            font-size: 12px;
+        }
+        
+        .btn-success {
+            background: #10b981;
+            color: white;
+        }
+        
+        .btn-warning {
+            background: #f59e0b;
+            color: white;
+        }
+        
+        .pagination {
+            display: flex;
+            justify-content: center;
+            gap: 10px;
+            margin-top: 20px;
+        }
+        
+        .pagination a {
+            padding: 8px 12px;
+            border: 1px solid #e2e8f0;
+            border-radius: 6px;
+            text-decoration: none;
+            color: #374151;
+        }
+        
+        .pagination a.active {
+            background: #667eea;
+            color: white;
+            border-color: #667eea;
+        }
+        
+        .modal {
+            display: none;
+            position: fixed;
+            top: 0;
+            left: 0;
+            width: 100%;
+            height: 100%;
+            background: rgba(0, 0, 0, 0.5);
+            z-index: 1000;
+        }
+        
+        .modal-content {
+            position: absolute;
+            top: 50%;
+            left: 50%;
+            transform: translate(-50%, -50%);
+            background: white;
+            padding: 30px;
+            border-radius: 12px;
+            width: 90%;
+            max-width: 500px;
+        }
+        
+        .modal h3 {
+            margin-bottom: 20px;
+            color: #374151;
+        }
+        
+        .form-group {
+            margin-bottom: 15px;
+        }
+        
+        .form-group label {
+            display: block;
+            margin-bottom: 5px;
+            font-weight: 500;
+            color: #374151;
+        }
+        
+        .form-group select,
+        .form-group textarea,
+        .form-group input {
+            width: 100%;
+            padding: 8px 12px;
+            border: 2px solid #e2e8f0;
+            border-radius: 6px;
+            font-size: 14px;
+        }
+        
+        .form-group textarea {
+            resize: vertical;
+            min-height: 80px;
+        }
+        
+        .modal-actions {
+            display: flex;
+            gap: 10px;
+            justify-content: flex-end;
+            margin-top: 20px;
+        }
+        
+        .message {
+            padding: 15px;
+            border-radius: 8px;
+            margin-bottom: 20px;
+            font-weight: 500;
+        }
+        
+        .message.success {
+            background: #d1fae5;
+            color: #065f46;
+            border: 1px solid #10b981;
+        }
+        
+        .message.error {
+            background: #fee2e2;
+            color: #991b1b;
+            border: 1px solid #ef4444;
+        }
+        
+        .account-settings {
+            background: white;
+            padding: 20px;
+            border-radius: 12px;
+            box-shadow: 0 2px 10px rgba(0, 0, 0, 0.05);
+            margin-bottom: 20px;
+        }
+        
+        .account-settings.collapsed {
+            display: none;
+        }
+        
+        @media (max-width: 768px) {
+            .header-content {
+                flex-direction: column;
+                gap: 15px;
+            }
+            
+            .controls {
+                flex-direction: column;
+                align-items: stretch;
+            }
+            
+            .table {
+                font-size: 14px;
+            }
+            
+            .table th,
+            .table td {
+                padding: 10px 8px;
+            }
+        }
+    </style>
+</head>
+<body>
+    <div class="header">
+        <div class="header-content">
+            <h1><i class="fas fa-tachometer-alt"></i> 管理后台</h1>
+            <div class="header-actions">
+                <span>欢迎，<?php echo htmlspecialchars($_SESSION['admin_username']); ?></span>
+                <button class="btn btn-primary" onclick="toggleAccountSettings()">
+                    <i class="fas fa-cog"></i> 账户设置
+                </button>
+                <a href="../index.php" class="btn btn-primary" target="_blank">
+                    <i class="fas fa-external-link-alt"></i> 前台
+                </a>
+                <a href="logout.php" class="btn btn-danger">
+                    <i class="fas fa-sign-out-alt"></i> 退出
+                </a>
+            </div>
+        </div>
+    </div>
+    
+    <div class="container">
+        <?php if ($message): ?>
+            <div class="message <?php echo $message_type; ?>">
+                <?php echo htmlspecialchars($message); ?>
+            </div>
+        <?php endif; ?>
+        
+        <!-- 账户设置 -->
+        <div class="account-settings" id="accountSettings">
+            <h3><i class="fas fa-user-cog"></i> 账户设置</h3>
+            <form method="POST">
+                <input type="hidden" name="action" value="update_account">
+                <div class="form-group">
+                    <label for="new_username">新用户名</label>
+                    <input type="text" id="new_username" name="new_username" 
+                           value="<?php echo htmlspecialchars($_SESSION['admin_username']); ?>" required>
+                </div>
+                <div class="form-group">
+                    <label for="new_password">新密码（留空则不修改）</label>
+                    <input type="password" id="new_password" name="new_password">
+                </div>
+                <div class="form-group">
+                    <label for="confirm_password">确认新密码</label>
+                    <input type="password" id="confirm_password" name="confirm_password">
+                </div>
+                <div class="modal-actions">
+                    <button type="submit" class="btn btn-success">
+                        <i class="fas fa-save"></i> 保存
+                    </button>
+                    <button type="button" class="btn btn-warning" onclick="toggleAccountSettings()">
+                        <i class="fas fa-times"></i> 取消
+                    </button>
+                </div>
+            </form>
+        </div>
+        
+        <!-- 统计数据 -->
+        <div class="stats-grid">
+            <div class="stat-card">
+                <h3><?php echo $stats['website_pending']; ?></h3>
+                <p>网址待审核</p>
+            </div>
+            <div class="stat-card">
+                <h3><?php echo $stats['website_approved']; ?></h3>
+                <p>网址已通过</p>
+            </div>
+            <div class="stat-card">
+                <h3><?php echo $stats['app_pending']; ?></h3>
+                <p>应用待审核</p>
+            </div>
+            <div class="stat-card">
+                <h3><?php echo $stats['app_approved']; ?></h3>
+                <p>应用已通过</p>
+            </div>
+        </div>
+        
+        <!-- 筛选控制 -->
+        <div class="controls">
+            <label>类型：</label>
+            <select onchange="changeType(this.value)">
+                <option value="website" <?php echo $type === 'website' ? 'selected' : ''; ?>>网址投稿</option>
+                <option value="app" <?php echo $type === 'app' ? 'selected' : ''; ?>>APP投稿</option>
+            </select>
+            
+            <label>状态：</label>
+            <select onchange="changeFilter(this.value)">
+                <option value="pending" <?php echo $filter === 'pending' ? 'selected' : ''; ?>>待处理</option>
+                <option value="approved" <?php echo $filter === 'approved' ? 'selected' : ''; ?>>已通过</option>
+                <option value="rejected" <?php echo $filter === 'rejected' ? 'selected' : ''; ?>>已拒绝</option>
+            </select>
+        </div>
+        
+        <!-- 投稿列表 -->
+        <div class="submissions-table">
+            <table class="table">
+                <thead>
+                    <tr>
+                        <th>ID</th>
+                        <?php if ($type === 'website'): ?>
+                            <th>网址</th>
+                            <th>标题</th>
+                        <?php else: ?>
+                            <th>应用名称</th>
+                            <th>平台</th>
+                            <th>版本</th>
+                        <?php endif; ?>
+                        <th>收录平台</th>
+                        <th>联系方式</th>
+                        <th>状态</th>
+                        <th>提交时间</th>
+                        <th>操作</th>
+                    </tr>
+                </thead>
+                <tbody>
+                    <?php foreach ($submissions as $submission): ?>
+                        <tr>
+                            <td><?php echo $submission['id']; ?></td>
+                            <?php if ($type === 'website'): ?>
+                                <td>
+                                    <a href="<?php echo htmlspecialchars($submission['url']); ?>" target="_blank">
+                                        <?php echo htmlspecialchars(substr($submission['url'], 0, 30)) . (strlen($submission['url']) > 30 ? '...' : ''); ?>
+                                    </a>
+                                </td>
+                                <td><?php echo htmlspecialchars($submission['title'] ?: '未获取'); ?></td>
+                            <?php else: ?>
+                                <td><?php echo htmlspecialchars($submission['name']); ?></td>
+                                <td><?php echo htmlspecialchars($submission['platform']); ?></td>
+                                <td><?php echo htmlspecialchars($submission['version'] ?: '-'); ?></td>
+                            <?php endif; ?>
+                            <td><?php echo htmlspecialchars($submission['platforms'] ?: '-'); ?></td>
+                            <td><?php echo htmlspecialchars($submission['contact'] ?: '-'); ?></td>
+                            <td>
+                                <span class="status-badge status-<?php echo $submission['status']; ?>">
+                                    <?php 
+                                    $status_text = [
+                                        'pending' => '待处理',
+                                        'approved' => '已通过',
+                                        'rejected' => '已拒绝'
+                                    ];
+                                    echo $status_text[$submission['status']];
+                                    ?>
+                                </span>
+                            </td>
+                            <td><?php echo date('Y-m-d H:i', strtotime($submission['created_at'])); ?></td>
+                            <td>
+                                <div class="action-buttons">
+                                    <button class="btn btn-sm btn-primary" 
+                                            onclick="showStatusModal(<?php echo $submission['id']; ?>, '<?php echo $type; ?>', '<?php echo $submission['status']; ?>', '<?php echo htmlspecialchars($submission['admin_note'] ?? '', ENT_QUOTES); ?>')">
+                                        <i class="fas fa-edit"></i>
+                                    </button>
+                                    <?php if ($submission['status'] === 'pending'): ?>
+                                        <button class="btn btn-sm btn-success" 
+                                                onclick="quickUpdate(<?php echo $submission['id']; ?>, '<?php echo $type; ?>', 'approved')">
+                                            <i class="fas fa-check"></i>
+                                        </button>
+                                        <button class="btn btn-sm btn-danger" 
+                                                onclick="quickUpdate(<?php echo $submission['id']; ?>, '<?php echo $type; ?>', 'rejected')">
+                                            <i class="fas fa-times"></i>
+                                        </button>
+                                    <?php endif; ?>
+                                </div>
+                            </td>
+                        </tr>
+                    <?php endforeach; ?>
+                </tbody>
+            </table>
+        </div>
+        
+        <!-- 分页 -->
+        <?php if ($total_pages > 1): ?>
+            <div class="pagination">
+                <?php for ($i = 1; $i <= $total_pages; $i++): ?>
+                    <a href="?type=<?php echo $type; ?>&filter=<?php echo $filter; ?>&page=<?php echo $i; ?>" 
+                       class="<?php echo $i === $page ? 'active' : ''; ?>">
+                        <?php echo $i; ?>
+                    </a>
+                <?php endfor; ?>
+            </div>
+        <?php endif; ?>
+    </div>
+    
+    <!-- 状态更新模态框 -->
+    <div class="modal" id="statusModal">
+        <div class="modal-content">
+            <h3>更新状态</h3>
+            <form method="POST">
+                <input type="hidden" name="action" value="update_status">
+                <input type="hidden" name="type" id="modal_type">
+                <input type="hidden" name="id" id="modal_id">
+                
+                <div class="form-group">
+                    <label for="modal_status">状态</label>
+                    <select name="status" id="modal_status">
+                        <option value="pending">待处理</option>
+                        <option value="approved">通过</option>
+                        <option value="rejected">拒绝</option>
+                    </select>
+                </div>
+                
+                <div class="form-group">
+                    <label for="modal_note">备注</label>
+                    <textarea name="note" id="modal_note" placeholder="审核备注（可选）"></textarea>
+                </div>
+                
+                <div class="modal-actions">
+                    <button type="submit" class="btn btn-success">
+                        <i class="fas fa-save"></i> 保存
+                    </button>
+                    <button type="button" class="btn btn-warning" onclick="closeModal()">
+                        <i class="fas fa-times"></i> 取消
+                    </button>
+                </div>
+            </form>
+        </div>
+    </div>
+    
+    <script>
+        function changeType(type) {
+            window.location.href = `?type=${type}&filter=<?php echo $filter; ?>`;
+        }
+        
+        function changeFilter(filter) {
+            window.location.href = `?type=<?php echo $type; ?>&filter=${filter}`;
+        }
+        
+        function showStatusModal(id, type, status, note) {
+            document.getElementById('modal_id').value = id;
+            document.getElementById('modal_type').value = type;
+            document.getElementById('modal_status').value = status;
+            document.getElementById('modal_note').value = note;
+            document.getElementById('statusModal').style.display = 'block';
+        }
+        
+        function closeModal() {
+            document.getElementById('statusModal').style.display = 'none';
+        }
+        
+        function quickUpdate(id, type, status) {
+            if (confirm(`确定要${status === 'approved' ? '通过' : '拒绝'}这个投稿吗？`)) {
+                const form = document.createElement('form');
+                form.method = 'POST';
+                form.innerHTML = `
+                    <input type="hidden" name="action" value="update_status">
+                    <input type="hidden" name="type" value="${type}">
+                    <input type="hidden" name="id" value="${id}">
+                    <input type="hidden" name="status" value="${status}">
+                    <input type="hidden" name="note" value="">
+                `;
+                document.body.appendChild(form);
+                form.submit();
+            }
+        }
+        
+        function toggleAccountSettings() {
+            const settings = document.getElementById('accountSettings');
+            settings.classList.toggle('collapsed');
+        }
+        
+        // 点击模态框外部关闭
+        window.onclick = function(event) {
+            const modal = document.getElementById('statusModal');
+            if (event.target === modal) {
+                closeModal();
+            }
+        }
+        
+        // 初始化时折叠账户设置
+        document.getElementById('accountSettings').classList.add('collapsed');
+    </script>
+</body>
+</html>
\ No newline at end of file
diff --git a/admin/login.php b/admin/login.php
new file mode 100644
index 0000000..3d72219
--- /dev/null
+++ b/admin/login.php
@@ -0,0 +1,280 @@
+<?php
+session_start();
+
+require_once '../config/database.php';
+require_once '../includes/utils.php';
+
+// 如果已登录，跳转到管理页面
+if (isset($_SESSION['admin_logged_in']) && $_SESSION['admin_logged_in']) {
+    header('Location: index.php');
+    exit;
+}
+
+$error = '';
+
+if ($_SERVER['REQUEST_METHOD'] === 'POST') {
+    $username = trim($_POST['username'] ?? '');
+    $password = $_POST['password'] ?? '';
+    $captcha = $_POST['captcha'] ?? '';
+    
+    if (empty($username) || empty($password) || empty($captcha)) {
+        $error = '请填写完整信息';
+    } elseif (!Utils::verifyCaptcha($captcha)) {
+        $error = '验证码错误';
+    } else {
+        $database = new Database();
+        $db = $database->getConnection();
+        
+        $stmt = $db->prepare("SELECT id, username, password FROM admins WHERE username = ?");
+        $stmt->execute([$username]);
+        $admin = $stmt->fetch();
+        
+        if ($admin && password_verify($password, $admin['password'])) {
+            $_SESSION['admin_logged_in'] = true;
+            $_SESSION['admin_id'] = $admin['id'];
+            $_SESSION['admin_username'] = $admin['username'];
+            header('Location: index.php');
+            exit;
+        } else {
+            $error = '用户名或密码错误';
+        }
+    }
+}
+?>
+
+<!DOCTYPE html>
+<html lang="zh-CN">
+<head>
+    <meta charset="UTF-8">
+    <meta name="viewport" content="width=device-width, initial-scale=1.0">
+    <title>管理后台登录</title>
+    <link href="https://cdnjs.cloudflare.com/ajax/libs/font-awesome/6.0.0/css/all.min.css" rel="stylesheet">
+    <style>
+        * {
+            margin: 0;
+            padding: 0;
+            box-sizing: border-box;
+        }
+        
+        body {
+            font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
+            background: linear-gradient(135deg, #1e3c72 0%, #2a5298 100%);
+            min-height: 100vh;
+            display: flex;
+            align-items: center;
+            justify-content: center;
+            padding: 20px;
+        }
+        
+        .login-container {
+            background: rgba(255, 255, 255, 0.95);
+            border-radius: 20px;
+            box-shadow: 0 20px 40px rgba(0, 0, 0, 0.1);
+            overflow: hidden;
+            width: 100%;
+            max-width: 400px;
+            backdrop-filter: blur(10px);
+        }
+        
+        .login-header {
+            background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
+            color: white;
+            padding: 40px 30px;
+            text-align: center;
+        }
+        
+        .login-header h1 {
+            font-size: 1.8rem;
+            font-weight: 700;
+            margin-bottom: 8px;
+        }
+        
+        .login-header p {
+            opacity: 0.9;
+            font-size: 0.9rem;
+        }
+        
+        .login-form {
+            padding: 40px 30px;
+        }
+        
+        .form-group {
+            margin-bottom: 25px;
+        }
+        
+        .form-group label {
+            display: block;
+            margin-bottom: 8px;
+            font-weight: 600;
+            color: #374151;
+            font-size: 14px;
+        }
+        
+        .form-group input {
+            width: 100%;
+            padding: 12px 16px;
+            border: 2px solid #e5e7eb;
+            border-radius: 10px;
+            font-size: 16px;
+            transition: all 0.3s ease;
+            background: #fafafa;
+        }
+        
+        .form-group input:focus {
+            outline: none;
+            border-color: #667eea;
+            background: white;
+            box-shadow: 0 0 0 3px rgba(102, 126, 234, 0.1);
+        }
+        
+        .captcha-group {
+            display: flex;
+            gap: 10px;
+            align-items: end;
+        }
+        
+        .captcha-group input {
+            flex: 1;
+        }
+        
+        .captcha-image {
+            border: 2px solid #e5e7eb;
+            border-radius: 8px;
+            cursor: pointer;
+            transition: all 0.3s ease;
+        }
+        
+        .captcha-image:hover {
+            border-color: #667eea;
+        }
+        
+        .error-message {
+            background: #fee2e2;
+            color: #991b1b;
+            padding: 12px 16px;
+            border-radius: 8px;
+            margin-bottom: 20px;
+            font-size: 14px;
+            border: 1px solid #fecaca;
+        }
+        
+        .login-btn {
+            width: 100%;
+            padding: 14px;
+            background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
+            color: white;
+            border: none;
+            border-radius: 10px;
+            font-size: 16px;
+            font-weight: 600;
+            cursor: pointer;
+            transition: all 0.3s ease;
+            display: flex;
+            align-items: center;
+            justify-content: center;
+            gap: 8px;
+        }
+        
+        .login-btn:hover {
+            transform: translateY(-2px);
+            box-shadow: 0 10px 20px rgba(102, 126, 234, 0.3);
+        }
+        
+        .login-btn:active {
+            transform: translateY(0);
+        }
+        
+        .default-account {
+            margin-top: 20px;
+            padding: 15px;
+            background: #f0f9ff;
+            border: 1px solid #bae6fd;
+            border-radius: 8px;
+            font-size: 13px;
+            color: #0369a1;
+        }
+        
+        .default-account strong {
+            display: block;
+            margin-bottom: 5px;
+        }
+        
+        @media (max-width: 480px) {
+            .login-container {
+                margin: 10px;
+                border-radius: 15px;
+            }
+            
+            .login-header {
+                padding: 30px 20px;
+            }
+            
+            .login-form {
+                padding: 30px 20px;
+            }
+        }
+    </style>
+</head>
+<body>
+    <div class="login-container">
+        <div class="login-header">
+            <h1><i class="fas fa-shield-alt"></i> 管理后台</h1>
+            <p>内容投稿系统管理中心</p>
+        </div>
+        
+        <div class="login-form">
+            <?php if ($error): ?>
+                <div class="error-message">
+                    <i class="fas fa-exclamation-circle"></i> <?php echo htmlspecialchars($error); ?>
+                </div>
+            <?php endif; ?>
+            
+            <form method="POST">
+                <div class="form-group">
+                    <label for="username">用户名</label>
+                    <input type="text" id="username" name="username" required 
+                           value="<?php echo htmlspecialchars($_POST['username'] ?? ''); ?>">
+                </div>
+                
+                <div class="form-group">
+                    <label for="password">密码</label>
+                    <input type="password" id="password" name="password" required>
+                </div>
+                
+                <div class="form-group">
+                    <label for="captcha">验证码</label>
+                    <div class="captcha-group">
+                        <input type="text" id="captcha" name="captcha" required 
+                               placeholder="请输入验证码" maxlength="4">
+                        <img src="captcha.php" alt="验证码" class="captcha-image" 
+                             onclick="this.src='captcha.php?'+Math.random()" 
+                             title="点击刷新验证码">
+                    </div>
+                </div>
+                
+                <button type="submit" class="login-btn">
+                    <i class="fas fa-sign-in-alt"></i> 登录
+                </button>
+            </form>
+            
+            <div class="default-account">
+                <strong><i class="fas fa-info-circle"></i> 默认账户信息：</strong>
+                用户名：admin<br>
+                密码：admin
+            </div>
+        </div>
+    </div>
+    
+    <script>
+        // 自动聚焦到用户名输入框
+        document.getElementById('username').focus();
+        
+        // 回车键提交表单
+        document.addEventListener('keypress', function(e) {
+            if (e.key === 'Enter') {
+                document.querySelector('form').submit();
+            }
+        });
+    </script>
+</body>
+</html>
\ No newline at end of file
diff --git a/admin/logout.php b/admin/logout.php
new file mode 100644
index 0000000..e0dea78
--- /dev/null
+++ b/admin/logout.php
@@ -0,0 +1,22 @@
+<?php
+session_start();
+
+// 清除所有会话数据
+$_SESSION = array();
+
+// 如果使用了cookie，也删除它
+if (ini_get("session.use_cookies")) {
+    $params = session_get_cookie_params();
+    setcookie(session_name(), '', time() - 42000,
+        $params["path"], $params["domain"],
+        $params["secure"], $params["httponly"]
+    );
+}
+
+// 销毁会话
+session_destroy();
+
+// 重定向到登录页面
+header('Location: login.php');
+exit;
+?>
\ No newline at end of file
diff --git a/api/fetch_website_info.php b/api/fetch_website_info.php
new file mode 100644
index 0000000..a08d2d1
--- /dev/null
+++ b/api/fetch_website_info.php
@@ -0,0 +1,35 @@
+<?php
+/**
+ * 获取网站信息API接口
+ */
+
+header('Content-Type: application/json');
+header('Access-Control-Allow-Origin: *');
+header('Access-Control-Allow-Methods: POST');
+header('Access-Control-Allow-Headers: Content-Type');
+
+require_once '../config/database.php';
+require_once '../includes/utils.php';
+
+if ($_SERVER['REQUEST_METHOD'] !== 'POST') {
+    http_response_code(405);
+    echo json_encode(['success' => false, 'message' => 'Method not allowed']);
+    exit;
+}
+
+$input = json_decode(file_get_contents('php://input'), true);
+$url = $input['url'] ?? '';
+
+if (empty($url)) {
+    echo json_encode(['success' => false, 'message' => 'URL is required']);
+    exit;
+}
+
+$database = new Database();
+$db = $database->getConnection();
+$utils = new Utils($db);
+
+$result = $utils->getWebsiteInfo($url);
+
+echo json_encode($result);
+?>
\ No newline at end of file
diff --git a/assets/css/style.css b/assets/css/style.css
new file mode 100644
index 0000000..fd11113
--- /dev/null
+++ b/assets/css/style.css
@@ -0,0 +1,524 @@
+/* 投稿系统样式文件 */
+/* 现代化设计，参考互联网大厂设计思路 */
+
+/* 全局样式重置 */
+* {
+    margin: 0;
+    padding: 0;
+    box-sizing: border-box;
+}
+
+/* CSS变量定义 - 统一配色方案 */
+:root {
+    /* 主色调 - 现代蓝紫渐变 */
+    --primary-color: #667eea;
+    --primary-dark: #5a67d8;
+    --primary-light: #7c3aed;
+    --primary-gradient: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
+    
+    /* 辅助色 */
+    --secondary-color: #f093fb;
+    --accent-color: #4facfe;
+    
+    /* 状态色 */
+    --success-color: #10b981;
+    --warning-color: #f59e0b;
+    --error-color: #ef4444;
+    --info-color: #3b82f6;
+    
+    /* 中性色 */
+    --text-primary: #1f2937;
+    --text-secondary: #6b7280;
+    --text-light: #9ca3af;
+    --border-color: #e5e7eb;
+    --bg-primary: #ffffff;
+    --bg-secondary: #f9fafb;
+    --bg-dark: #111827;
+    
+    /* 阴影 */
+    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
+    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
+    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
+    --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 10px 10px -5px rgba(0, 0, 0, 0.04);
+    
+    /* 圆角 */
+    --radius-sm: 0.375rem;
+    --radius-md: 0.5rem;
+    --radius-lg: 0.75rem;
+    --radius-xl: 1rem;
+    
+    /* 间距 */
+    --spacing-xs: 0.25rem;
+    --spacing-sm: 0.5rem;
+    --spacing-md: 1rem;
+    --spacing-lg: 1.5rem;
+    --spacing-xl: 2rem;
+    --spacing-2xl: 3rem;
+}
+
+/* 基础样式 */
+body {
+    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
+    line-height: 1.6;
+    color: var(--text-primary);
+    background: var(--bg-secondary);
+    font-size: 16px;
+}
+
+/* 容器样式 */
+.container {
+    max-width: 1200px;
+    margin: 0 auto;
+    padding: 0 var(--spacing-md);
+}
+
+.container-sm {
+    max-width: 600px;
+    margin: 0 auto;
+    padding: 0 var(--spacing-md);
+}
+
+/* 卡片样式 */
+.card {
+    background: var(--bg-primary);
+    border-radius: var(--radius-lg);
+    box-shadow: var(--shadow-md);
+    padding: var(--spacing-xl);
+    margin-bottom: var(--spacing-lg);
+    border: 1px solid var(--border-color);
+    transition: all 0.3s ease;
+}
+
+.card:hover {
+    box-shadow: var(--shadow-lg);
+    transform: translateY(-2px);
+}
+
+.card-header {
+    margin-bottom: var(--spacing-lg);
+    padding-bottom: var(--spacing-md);
+    border-bottom: 2px solid var(--border-color);
+}
+
+.card-title {
+    font-size: 1.5rem;
+    font-weight: 600;
+    color: var(--text-primary);
+    margin-bottom: var(--spacing-sm);
+}
+
+.card-subtitle {
+    color: var(--text-secondary);
+    font-size: 0.875rem;
+}
+
+/* 按钮样式 */
+.btn {
+    display: inline-flex;
+    align-items: center;
+    justify-content: center;
+    padding: 0.75rem 1.5rem;
+    font-size: 0.875rem;
+    font-weight: 500;
+    border-radius: var(--radius-md);
+    border: none;
+    cursor: pointer;
+    text-decoration: none;
+    transition: all 0.2s ease;
+    min-height: 44px;
+    gap: var(--spacing-sm);
+}
+
+.btn-primary {
+    background: var(--primary-gradient);
+    color: white;
+    box-shadow: var(--shadow-sm);
+}
+
+.btn-primary:hover {
+    transform: translateY(-1px);
+    box-shadow: var(--shadow-md);
+    filter: brightness(1.05);
+}
+
+.btn-secondary {
+    background: var(--bg-primary);
+    color: var(--text-primary);
+    border: 1px solid var(--border-color);
+}
+
+.btn-secondary:hover {
+    background: var(--bg-secondary);
+    border-color: var(--primary-color);
+}
+
+.btn-success {
+    background: var(--success-color);
+    color: white;
+}
+
+.btn-warning {
+    background: var(--warning-color);
+    color: white;
+}
+
+.btn-danger {
+    background: var(--error-color);
+    color: white;
+}
+
+.btn-sm {
+    padding: 0.5rem 1rem;
+    font-size: 0.75rem;
+    min-height: 36px;
+}
+
+.btn-lg {
+    padding: 1rem 2rem;
+    font-size: 1rem;
+    min-height: 52px;
+}
+
+.btn:disabled {
+    opacity: 0.6;
+    cursor: not-allowed;
+    transform: none;
+}
+
+/* 表单样式 */
+.form-group {
+    margin-bottom: var(--spacing-lg);
+}
+
+.form-label {
+    display: block;
+    font-weight: 500;
+    color: var(--text-primary);
+    margin-bottom: var(--spacing-sm);
+    font-size: 0.875rem;
+}
+
+.form-label.required::after {
+    content: ' *';
+    color: var(--error-color);
+}
+
+.form-control {
+    width: 100%;
+    padding: 0.75rem;
+    border: 1px solid var(--border-color);
+    border-radius: var(--radius-md);
+    font-size: 0.875rem;
+    transition: all 0.2s ease;
+    background: var(--bg-primary);
+    min-height: 44px;
+}
+
+.form-control:focus {
+    outline: none;
+    border-color: var(--primary-color);
+    box-shadow: 0 0 0 3px rgba(102, 126, 234, 0.1);
+}
+
+.form-control:invalid {
+    border-color: var(--error-color);
+}
+
+textarea.form-control {
+    resize: vertical;
+    min-height: 100px;
+}
+
+select.form-control {
+    cursor: pointer;
+}
+
+/* 复选框样式 */
+.checkbox-group {
+    display: flex;
+    flex-direction: column;
+    gap: var(--spacing-sm);
+}
+
+.checkbox-item {
+    display: flex;
+    align-items: center;
+    gap: var(--spacing-sm);
+    padding: var(--spacing-sm);
+    border-radius: var(--radius-sm);
+    transition: background-color 0.2s ease;
+}
+
+.checkbox-item:hover {
+    background: var(--bg-secondary);
+}
+
+.checkbox-item input[type="checkbox"] {
+    width: 18px;
+    height: 18px;
+    accent-color: var(--primary-color);
+}
+
+.checkbox-item label {
+    font-size: 0.875rem;
+    cursor: pointer;
+    flex: 1;
+}
+
+/* 警告提示样式 */
+.platform-warning {
+    background: linear-gradient(135deg, #fef3c7 0%, #fde68a 100%);
+    border: 1px solid #f59e0b;
+    border-radius: var(--radius-md);
+    padding: var(--spacing-md);
+    margin-top: var(--spacing-sm);
+    font-size: 0.75rem;
+    color: #92400e;
+    display: none;
+}
+
+.platform-warning.show {
+    display: block;
+    animation: slideDown 0.3s ease;
+}
+
+/* 切换按钮样式 */
+.tab-container {
+    display: flex;
+    background: var(--bg-secondary);
+    border-radius: var(--radius-lg);
+    padding: var(--spacing-xs);
+    margin-bottom: var(--spacing-xl);
+    border: 1px solid var(--border-color);
+}
+
+.tab-btn {
+    flex: 1;
+    padding: var(--spacing-md);
+    background: transparent;
+    border: none;
+    border-radius: var(--radius-md);
+    font-weight: 500;
+    cursor: pointer;
+    transition: all 0.2s ease;
+    color: var(--text-secondary);
+}
+
+.tab-btn.active {
+    background: var(--bg-primary);
+    color: var(--primary-color);
+    box-shadow: var(--shadow-sm);
+}
+
+/* 表单内容区域 */
+.form-content {
+    display: none;
+}
+
+.form-content.active {
+    display: block;
+    animation: fadeIn 0.3s ease;
+}
+
+/* 消息提示样式 */
+.alert {
+    padding: var(--spacing-md);
+    border-radius: var(--radius-md);
+    margin-bottom: var(--spacing-lg);
+    border: 1px solid transparent;
+    font-size: 0.875rem;
+}
+
+.alert-success {
+    background: #ecfdf5;
+    border-color: #10b981;
+    color: #065f46;
+}
+
+.alert-error {
+    background: #fef2f2;
+    border-color: #ef4444;
+    color: #991b1b;
+}
+
+.alert-warning {
+    background: #fffbeb;
+    border-color: #f59e0b;
+    color: #92400e;
+}
+
+.alert-info {
+    background: #eff6ff;
+    border-color: #3b82f6;
+    color: #1e40af;
+}
+
+/* 加载状态 */
+.loading {
+    display: inline-flex;
+    align-items: center;
+    gap: var(--spacing-sm);
+}
+
+.spinner {
+    width: 16px;
+    height: 16px;
+    border: 2px solid transparent;
+    border-top: 2px solid currentColor;
+    border-radius: 50%;
+    animation: spin 1s linear infinite;
+}
+
+/* 响应式设计 */
+@media (max-width: 768px) {
+    .container {
+        padding: 0 var(--spacing-sm);
+    }
+    
+    .card {
+        padding: var(--spacing-lg);
+        margin-bottom: var(--spacing-md);
+    }
+    
+    .btn {
+        width: 100%;
+        justify-content: center;
+    }
+    
+    .tab-container {
+        flex-direction: column;
+    }
+    
+    .tab-btn {
+        text-align: center;
+    }
+}
+
+/* 动画效果 */
+@keyframes fadeIn {
+    from {
+        opacity: 0;
+        transform: translateY(10px);
+    }
+    to {
+        opacity: 1;
+        transform: translateY(0);
+    }
+}
+
+@keyframes slideDown {
+    from {
+        opacity: 0;
+        max-height: 0;
+        transform: translateY(-10px);
+    }
+    to {
+        opacity: 1;
+        max-height: 100px;
+        transform: translateY(0);
+    }
+}
+
+@keyframes spin {
+    to {
+        transform: rotate(360deg);
+    }
+}
+
+/* 页面头部样式 */
+.page-header {
+    background: var(--primary-gradient);
+    color: white;
+    padding: var(--spacing-2xl) 0;
+    margin-bottom: var(--spacing-xl);
+    text-align: center;
+}
+
+.page-title {
+    font-size: 2.5rem;
+    font-weight: 700;
+    margin-bottom: var(--spacing-sm);
+}
+
+.page-subtitle {
+    font-size: 1.125rem;
+    opacity: 0.9;
+    font-weight: 400;
+}
+
+/* 页脚样式 */
+.page-footer {
+    background: var(--bg-dark);
+    color: white;
+    padding: var(--spacing-xl) 0;
+    margin-top: var(--spacing-2xl);
+    text-align: center;
+}
+
+.page-footer p {
+    margin-bottom: var(--spacing-sm);
+    opacity: 0.8;
+}
+
+/* 工具类 */
+.text-center { text-align: center; }
+.text-left { text-align: left; }
+.text-right { text-align: right; }
+
+.mt-0 { margin-top: 0; }
+.mt-1 { margin-top: var(--spacing-xs); }
+.mt-2 { margin-top: var(--spacing-sm); }
+.mt-3 { margin-top: var(--spacing-md); }
+.mt-4 { margin-top: var(--spacing-lg); }
+.mt-5 { margin-top: var(--spacing-xl); }
+
+.mb-0 { margin-bottom: 0; }
+.mb-1 { margin-bottom: var(--spacing-xs); }
+.mb-2 { margin-bottom: var(--spacing-sm); }
+.mb-3 { margin-bottom: var(--spacing-md); }
+.mb-4 { margin-bottom: var(--spacing-lg); }
+.mb-5 { margin-bottom: var(--spacing-xl); }
+
+.hidden { display: none; }
+.block { display: block; }
+.inline-block { display: inline-block; }
+.flex { display: flex; }
+.inline-flex { display: inline-flex; }
+
+.justify-center { justify-content: center; }
+.justify-between { justify-content: space-between; }
+.items-center { align-items: center; }
+
+.w-full { width: 100%; }
+.h-full { height: 100%; }
+
+.opacity-50 { opacity: 0.5; }
+.opacity-75 { opacity: 0.75; }
+
+/* 深色模式支持 */
+@media (prefers-color-scheme: dark) {
+    :root {
+        --text-primary: #f9fafb;
+        --text-secondary: #d1d5db;
+        --text-light: #9ca3af;
+        --border-color: #374151;
+        --bg-primary: #1f2937;
+        --bg-secondary: #111827;
+    }
+    
+    .card {
+        border-color: var(--border-color);
+    }
+    
+    .form-control {
+        background: var(--bg-primary);
+        border-color: var(--border-color);
+        color: var(--text-primary);
+    }
+    
+    .btn-secondary {
+        background: var(--bg-primary);
+        color: var(--text-primary);
+        border-color: var(--border-color);
+    }
+}
\ No newline at end of file
diff --git a/assets/js/main.js b/assets/js/main.js
new file mode 100644
index 0000000..3967f38
--- /dev/null
+++ b/assets/js/main.js
@@ -0,0 +1,612 @@
+/**
+ * 投稿系统前端交互脚本
+ * 提供表单切换、验证、提交等功能
+ */
+
+// 全局变量
+let currentFormType = 'website';
+let isSubmitting = false;
+
+// DOM加载完成后初始化
+document.addEventListener('DOMContentLoaded', function() {
+    initializeApp();
+});
+
+/**
+ * 初始化应用
+ */
+function initializeApp() {
+    initializeFormSwitching();
+    initializeFormValidation();
+    initializeWebsiteInfoFetching();
+    initializePlatformWarnings();
+    initializeFormSubmission();
+}
+
+/**
+ * 初始化表单切换功能
+ */
+function initializeFormSwitching() {
+    const tabButtons = document.querySelectorAll('.tab-btn');
+    const formContents = document.querySelectorAll('.form-content');
+    
+    tabButtons.forEach(button => {
+        button.addEventListener('click', function() {
+            const targetForm = this.dataset.form;
+            switchForm(targetForm);
+        });
+    });
+}
+
+/**
+ * 切换表单
+ * @param {string} formType - 表单类型 ('website' 或 'app')
+ */
+function switchForm(formType) {
+    currentFormType = formType;
+    
+    // 更新标签按钮状态
+    document.querySelectorAll('.tab-btn').forEach(btn => {
+        btn.classList.remove('active');
+    });
+    document.querySelector(`[data-form="${formType}"]`).classList.add('active');
+    
+    // 切换表单内容
+    document.querySelectorAll('.form-content').forEach(content => {
+        content.classList.remove('active');
+    });
+    document.getElementById(`${formType}-form`).classList.add('active');
+    
+    // 更新必填字段
+    updateRequiredFields(formType);
+    
+    // 清除之前的错误信息
+    clearFormErrors();
+}
+
+/**
+ * 更新必填字段
+ * @param {string} formType - 表单类型
+ */
+function updateRequiredFields(formType) {
+    // 清除所有必填标记
+    document.querySelectorAll('input, textarea, select').forEach(field => {
+        field.removeAttribute('required');
+    });
+    
+    if (formType === 'website') {
+        // 网址投稿必填字段
+        const requiredFields = ['url', 'platforms'];
+        requiredFields.forEach(fieldName => {
+            const field = document.querySelector(`[name="${fieldName}"]`);
+            if (field) {
+                if (fieldName === 'platforms') {
+                    // 平台选择至少选一个
+                    const checkboxes = document.querySelectorAll('input[name="platforms[]"]');
+                    checkboxes.forEach(cb => cb.setAttribute('required', 'required'));
+                } else {
+                    field.setAttribute('required', 'required');
+                }
+            }
+        });
+    } else if (formType === 'app') {
+        // APP投稿必填字段
+        const requiredFields = ['app_name', 'platform', 'version', 'download_url'];
+        requiredFields.forEach(fieldName => {
+            const field = document.querySelector(`[name="${fieldName}"]`);
+            if (field) {
+                field.setAttribute('required', 'required');
+            }
+        });
+    }
+}
+
+/**
+ * 初始化表单验证
+ */
+function initializeFormValidation() {
+    // URL格式验证
+    const urlInput = document.querySelector('input[name="url"]');
+    if (urlInput) {
+        urlInput.addEventListener('blur', validateURL);
+        urlInput.addEventListener('input', debounce(validateURL, 500));
+    }
+    
+    // 平台选择验证
+    const platformCheckboxes = document.querySelectorAll('input[name="platforms[]"]');
+    platformCheckboxes.forEach(checkbox => {
+        checkbox.addEventListener('change', validatePlatformSelection);
+    });
+    
+    // APP表单验证
+    const appNameInput = document.querySelector('input[name="app_name"]');
+    if (appNameInput) {
+        appNameInput.addEventListener('blur', validateAppName);
+    }
+    
+    const downloadUrlInput = document.querySelector('input[name="download_url"]');
+    if (downloadUrlInput) {
+        downloadUrlInput.addEventListener('blur', validateDownloadURL);
+    }
+}
+
+/**
+ * 验证URL格式
+ */
+function validateURL() {
+    const urlInput = document.querySelector('input[name="url"]');
+    const url = urlInput.value.trim();
+    
+    if (!url) return;
+    
+    // 自动添加协议
+    if (url && !url.match(/^https?:\/\//)) {
+        urlInput.value = 'https://' + url;
+    }
+    
+    // 验证URL格式
+    const urlPattern = /^https?:\/\/(www\.)?[-a-zA-Z0-9@:%._\+~#=]{1,256}\.[a-zA-Z0-9()]{1,6}\b([-a-zA-Z0-9()@:%_\+.~#?&//=]*)$/;
+    
+    if (!urlPattern.test(urlInput.value)) {
+        showFieldError(urlInput, '请输入有效的网址格式');
+        return false;
+    } else {
+        clearFieldError(urlInput);
+        return true;
+    }
+}
+
+/**
+ * 验证平台选择
+ */
+function validatePlatformSelection() {
+    const checkboxes = document.querySelectorAll('input[name="platforms[]"]');
+    const checked = Array.from(checkboxes).some(cb => cb.checked);
+    
+    if (!checked) {
+        showFieldError(checkboxes[0].closest('.checkbox-group'), '请至少选择一个收录平台');
+        return false;
+    } else {
+        clearFieldError(checkboxes[0].closest('.checkbox-group'));
+        return true;
+    }
+}
+
+/**
+ * 验证APP名称
+ */
+function validateAppName() {
+    const appNameInput = document.querySelector('input[name="app_name"]');
+    const appName = appNameInput.value.trim();
+    
+    if (appName.length < 2) {
+        showFieldError(appNameInput, 'APP名称至少需要2个字符');
+        return false;
+    } else {
+        clearFieldError(appNameInput);
+        return true;
+    }
+}
+
+/**
+ * 验证下载链接
+ */
+function validateDownloadURL() {
+    const downloadUrlInput = document.querySelector('input[name="download_url"]');
+    const url = downloadUrlInput.value.trim();
+    
+    if (!url) return;
+    
+    const urlPattern = /^https?:\/\/(www\.)?[-a-zA-Z0-9@:%._\+~#=]{1,256}\.[a-zA-Z0-9()]{1,6}\b([-a-zA-Z0-9()@:%_\+.~#?&//=]*)$/;
+    
+    if (!urlPattern.test(url)) {
+        showFieldError(downloadUrlInput, '请输入有效的下载链接');
+        return false;
+    } else {
+        clearFieldError(downloadUrlInput);
+        return true;
+    }
+}
+
+/**
+ * 显示字段错误
+ * @param {Element} field - 字段元素
+ * @param {string} message - 错误信息
+ */
+function showFieldError(field, message) {
+    clearFieldError(field);
+    
+    const errorDiv = document.createElement('div');
+    errorDiv.className = 'field-error';
+    errorDiv.style.cssText = `
+        color: var(--error-color);
+        font-size: 0.75rem;
+        margin-top: 0.25rem;
+        display: flex;
+        align-items: center;
+        gap: 0.25rem;
+    `;
+    errorDiv.innerHTML = `
+        <svg width="14" height="14" viewBox="0 0 24 24" fill="currentColor">
+            <path d="M12 2C6.48 2 2 6.48 2 12s4.48 10 10 10 10-4.48 10-10S17.52 2 12 2zm-2 15l-5-5 1.41-1.41L10 14.17l7.59-7.59L19 8l-9 9z"/>
+        </svg>
+        ${message}
+    `;
+    
+    field.style.borderColor = 'var(--error-color)';
+    field.parentNode.appendChild(errorDiv);
+}
+
+/**
+ * 清除字段错误
+ * @param {Element} field - 字段元素
+ */
+function clearFieldError(field) {
+    const existingError = field.parentNode.querySelector('.field-error');
+    if (existingError) {
+        existingError.remove();
+    }
+    field.style.borderColor = '';
+}
+
+/**
+ * 清除所有表单错误
+ */
+function clearFormErrors() {
+    document.querySelectorAll('.field-error').forEach(error => error.remove());
+    document.querySelectorAll('.form-control').forEach(field => {
+        field.style.borderColor = '';
+    });
+}
+
+/**
+ * 初始化网站信息获取功能
+ */
+function initializeWebsiteInfoFetching() {
+    const urlInput = document.querySelector('input[name="url"]');
+    const fetchBtn = document.querySelector('#fetch-info-btn');
+    
+    if (fetchBtn) {
+        fetchBtn.addEventListener('click', fetchWebsiteInfo);
+    }
+    
+    if (urlInput) {
+        urlInput.addEventListener('keypress', function(e) {
+            if (e.key === 'Enter') {
+                e.preventDefault();
+                fetchWebsiteInfo();
+            }
+        });
+    }
+}
+
+/**
+ * 获取网站信息
+ */
+async function fetchWebsiteInfo() {
+    const urlInput = document.querySelector('input[name="url"]');
+    const fetchBtn = document.querySelector('#fetch-info-btn');
+    const url = urlInput.value.trim();
+    
+    if (!url) {
+        showAlert('请先输入网址', 'warning');
+        return;
+    }
+    
+    if (!validateURL()) {
+        return;
+    }
+    
+    // 显示加载状态
+    const originalText = fetchBtn.innerHTML;
+    fetchBtn.innerHTML = '<span class="spinner"></span> 获取中...';
+    fetchBtn.disabled = true;
+    
+    try {
+        const response = await fetch('api/fetch_website_info.php', {
+            method: 'POST',
+            headers: {
+                'Content-Type': 'application/json',
+            },
+            body: JSON.stringify({ url: url })
+        });
+        
+        const data = await response.json();
+        
+        if (data.success) {
+            // 填充表单字段
+            fillWebsiteInfo(data.data);
+            showAlert('网站信息获取成功！', 'success');
+        } else {
+            showAlert(data.message || '获取网站信息失败', 'error');
+        }
+    } catch (error) {
+        console.error('获取网站信息失败:', error);
+        showAlert('网络错误，请稍后重试', 'error');
+    } finally {
+        // 恢复按钮状态
+        fetchBtn.innerHTML = originalText;
+        fetchBtn.disabled = false;
+    }
+}
+
+/**
+ * 填充网站信息到表单
+ * @param {Object} info - 网站信息
+ */
+function fillWebsiteInfo(info) {
+    const fields = {
+        'site_name': info.title || '',
+        'site_description': info.description || '',
+        'site_keywords': info.keywords || ''
+    };
+    
+    Object.entries(fields).forEach(([fieldName, value]) => {
+        const field = document.querySelector(`[name="${fieldName}"]`);
+        if (field && value) {
+            field.value = value;
+            // 触发输入事件以更新UI
+            field.dispatchEvent(new Event('input', { bubbles: true }));
+        }
+    });
+}
+
+/**
+ * 初始化平台警告提示
+ */
+function initializePlatformWarnings() {
+    const platformCheckboxes = document.querySelectorAll('input[name="platforms[]"]');
+    
+    platformCheckboxes.forEach(checkbox => {
+        checkbox.addEventListener('change', updatePlatformWarnings);
+    });
+}
+
+/**
+ * 更新平台警告提示
+ */
+function updatePlatformWarnings() {
+    const warnings = {
+        'zmtwiki': '该平台需要合法合规的内容',
+        'ztab': '该平台需要合法合规的内容',
+        'soso': '该平台内容审查相当宽松'
+    };
+    
+    // 清除现有警告
+    document.querySelectorAll('.platform-warning').forEach(warning => {
+        warning.classList.remove('show');
+    });
+    
+    // 显示相关警告
+    Object.entries(warnings).forEach(([platform, message]) => {
+        const checkbox = document.querySelector(`input[value="${platform}"]`);
+        if (checkbox && checkbox.checked) {
+            showPlatformWarning(platform, message);
+        }
+    });
+}
+
+/**
+ * 显示平台警告
+ * @param {string} platform - 平台名称
+ * @param {string} message - 警告信息
+ */
+function showPlatformWarning(platform, message) {
+    let warningDiv = document.querySelector(`#warning-${platform}`);
+    
+    if (!warningDiv) {
+        warningDiv = document.createElement('div');
+        warningDiv.id = `warning-${platform}`;
+        warningDiv.className = 'platform-warning';
+        
+        const checkbox = document.querySelector(`input[value="${platform}"]`);
+        checkbox.closest('.checkbox-item').appendChild(warningDiv);
+    }
+    
+    warningDiv.innerHTML = `
+        <svg width="16" height="16" viewBox="0 0 24 24" fill="currentColor" style="flex-shrink: 0;">
+            <path d="M1 21h22L12 2 1 21zm12-3h-2v-2h2v2zm0-4h-2v-4h2v4z"/>
+        </svg>
+        <span>${message}</span>
+    `;
+    warningDiv.classList.add('show');
+}
+
+/**
+ * 初始化表单提交
+ */
+function initializeFormSubmission() {
+    const form = document.querySelector('#submission-form');
+    
+    if (form) {
+        form.addEventListener('submit', handleFormSubmission);
+    }
+}
+
+/**
+ * 处理表单提交
+ * @param {Event} e - 提交事件
+ */
+async function handleFormSubmission(e) {
+    e.preventDefault();
+    
+    if (isSubmitting) return;
+    
+    // 验证表单
+    if (!validateForm()) {
+        return;
+    }
+    
+    isSubmitting = true;
+    const submitBtn = document.querySelector('button[type="submit"]');
+    const originalText = submitBtn.innerHTML;
+    
+    // 显示提交状态
+    submitBtn.innerHTML = '<span class="spinner"></span> 提交中...';
+    submitBtn.disabled = true;
+    
+    try {
+        const formData = new FormData(e.target);
+        formData.append('form_type', currentFormType);
+        
+        const response = await fetch('', {
+            method: 'POST',
+            body: formData
+        });
+        
+        const result = await response.text();
+        
+        // 检查响应中是否包含成功信息
+        if (result.includes('提交成功') || result.includes('success')) {
+            showAlert('投稿提交成功！我们会尽快审核您的内容。', 'success');
+            resetForm();
+        } else if (result.includes('已存在') || result.includes('重复')) {
+            showAlert('该内容已存在，请勿重复提交。', 'warning');
+        } else if (result.includes('超出限制') || result.includes('限制')) {
+            showAlert('今日提交次数已达上限，请明天再试。', 'warning');
+        } else {
+            showAlert('提交失败，请稍后重试。', 'error');
+        }
+    } catch (error) {
+        console.error('提交失败:', error);
+        showAlert('网络错误，请稍后重试。', 'error');
+    } finally {
+        // 恢复按钮状态
+        isSubmitting = false;
+        submitBtn.innerHTML = originalText;
+        submitBtn.disabled = false;
+    }
+}
+
+/**
+ * 验证整个表单
+ * @returns {boolean} 验证结果
+ */
+function validateForm() {
+    let isValid = true;
+    
+    if (currentFormType === 'website') {
+        if (!validateURL()) isValid = false;
+        if (!validatePlatformSelection()) isValid = false;
+    } else if (currentFormType === 'app') {
+        if (!validateAppName()) isValid = false;
+        if (!validateDownloadURL()) isValid = false;
+    }
+    
+    return isValid;
+}
+
+/**
+ * 重置表单
+ */
+function resetForm() {
+    const form = document.querySelector('#submission-form');
+    if (form) {
+        form.reset();
+        clearFormErrors();
+        
+        // 清除平台警告
+        document.querySelectorAll('.platform-warning').forEach(warning => {
+            warning.classList.remove('show');
+        });
+    }
+}
+
+/**
+ * 显示提示信息
+ * @param {string} message - 提示信息
+ * @param {string} type - 提示类型 (success, error, warning, info)
+ */
+function showAlert(message, type = 'info') {
+    // 移除现有提示
+    const existingAlert = document.querySelector('.alert');
+    if (existingAlert) {
+        existingAlert.remove();
+    }
+    
+    const alertDiv = document.createElement('div');
+    alertDiv.className = `alert alert-${type}`;
+    alertDiv.innerHTML = `
+        <div style="display: flex; align-items: center; gap: 0.5rem;">
+            ${getAlertIcon(type)}
+            <span>${message}</span>
+        </div>
+    `;
+    
+    // 插入到表单顶部
+    const form = document.querySelector('#submission-form');
+    if (form) {
+        form.insertBefore(alertDiv, form.firstChild);
+    }
+    
+    // 自动隐藏
+    setTimeout(() => {
+        if (alertDiv.parentNode) {
+            alertDiv.style.opacity = '0';
+            alertDiv.style.transform = 'translateY(-10px)';
+            setTimeout(() => alertDiv.remove(), 300);
+        }
+    }, 5000);
+}
+
+/**
+ * 获取提示图标
+ * @param {string} type - 提示类型
+ * @returns {string} SVG图标
+ */
+function getAlertIcon(type) {
+    const icons = {
+        success: '<svg width="20" height="20" viewBox="0 0 24 24" fill="currentColor"><path d="M12 2C6.48 2 2 6.48 2 12s4.48 10 10 10 10-4.48 10-10S17.52 2 12 2zm-2 15l-5-5 1.41-1.41L10 14.17l7.59-7.59L19 8l-9 9z"/></svg>',
+        error: '<svg width="20" height="20" viewBox="0 0 24 24" fill="currentColor"><path d="M12 2C6.47 2 2 6.47 2 12s4.47 10 10 10 10-4.47 10-10S17.53 2 12 2zm5 13.59L15.59 17 12 13.41 8.41 17 7 15.59 10.59 12 7 8.41 8.41 7 12 10.59 15.59 7 17 8.41 13.41 12 17 15.59z"/></svg>',
+        warning: '<svg width="20" height="20" viewBox="0 0 24 24" fill="currentColor"><path d="M1 21h22L12 2 1 21zm12-3h-2v-2h2v2zm0-4h-2v-4h2v4z"/></svg>',
+        info: '<svg width="20" height="20" viewBox="0 0 24 24" fill="currentColor"><path d="M12 2C6.48 2 2 6.48 2 12s4.48 10 10 10 10-4.48 10-10S17.52 2 12 2zm1 15h-2v-6h2v6zm0-8h-2V7h2v2z"/></svg>'
+    };
+    
+    return icons[type] || icons.info;
+}
+
+/**
+ * 防抖函数
+ * @param {Function} func - 要防抖的函数
+ * @param {number} wait - 等待时间
+ * @returns {Function} 防抖后的函数
+ */
+function debounce(func, wait) {
+    let timeout;
+    return function executedFunction(...args) {
+        const later = () => {
+            clearTimeout(timeout);
+            func(...args);
+        };
+        clearTimeout(timeout);
+        timeout = setTimeout(later, wait);
+    };
+}
+
+/**
+ * 节流函数
+ * @param {Function} func - 要节流的函数
+ * @param {number} limit - 限制时间
+ * @returns {Function} 节流后的函数
+ */
+function throttle(func, limit) {
+    let inThrottle;
+    return function() {
+        const args = arguments;
+        const context = this;
+        if (!inThrottle) {
+            func.apply(context, args);
+            inThrottle = true;
+            setTimeout(() => inThrottle = false, limit);
+        }
+    };
+}
+
+// 导出函数供其他脚本使用
+window.SubmissionSystem = {
+    switchForm,
+    validateForm,
+    fetchWebsiteInfo,
+    showAlert,
+    resetForm
+};
\ No newline at end of file
diff --git a/cleanup.php b/cleanup.php
new file mode 100644
index 0000000..08b11cd
--- /dev/null
+++ b/cleanup.php
@@ -0,0 +1,231 @@
+<?php
+/**
+ * 数据清理脚本
+ * 用于定期清理过期的IP限制记录和旧的投稿数据
+ * 建议通过定时任务每天运行一次
+ */
+
+require_once 'config/database.php';
+
+class DataCleanup {
+    private $db;
+    
+    public function __construct() {
+        $database = new Database();
+        $this->db = $database->getConnection();
+    }
+    
+    /**
+     * 清理过期的IP限制记录
+     * 删除7天前的记录
+     */
+    public function cleanupIPLimits() {
+        try {
+            $sql = "DELETE FROM ip_limits WHERE DATE(last_submit) < DATE_SUB(NOW(), INTERVAL 7 DAY)";
+            $stmt = $this->db->prepare($sql);
+            $result = $stmt->execute();
+            
+            $deletedRows = $stmt->rowCount();
+            $this->log("清理IP限制记录: 删除了 {$deletedRows} 条过期记录");
+            
+            return $deletedRows;
+        } catch (Exception $e) {
+            $this->log("清理IP限制记录失败: " . $e->getMessage(), 'ERROR');
+            return false;
+        }
+    }
+    
+    /**
+     * 清理旧的投稿记录
+     * 删除6个月前已处理的记录
+     */
+    public function cleanupOldSubmissions() {
+        $deletedWebsite = 0;
+        $deletedApp = 0;
+        
+        try {
+            // 清理网址投稿记录
+            $sql = "DELETE FROM website_submissions WHERE status != 'pending' AND DATE(created_at) < DATE_SUB(NOW(), INTERVAL 6 MONTH)";
+            $stmt = $this->db->prepare($sql);
+            $stmt->execute();
+            $deletedWebsite = $stmt->rowCount();
+            
+            // 清理APP投稿记录
+            $sql = "DELETE FROM app_submissions WHERE status != 'pending' AND DATE(created_at) < DATE_SUB(NOW(), INTERVAL 6 MONTH)";
+            $stmt = $this->db->prepare($sql);
+            $stmt->execute();
+            $deletedApp = $stmt->rowCount();
+            
+            $this->log("清理旧投稿记录: 网址投稿 {$deletedWebsite} 条, APP投稿 {$deletedApp} 条");
+            
+            return ['website' => $deletedWebsite, 'app' => $deletedApp];
+        } catch (Exception $e) {
+            $this->log("清理旧投稿记录失败: " . $e->getMessage(), 'ERROR');
+            return false;
+        }
+    }
+    
+    /**
+     * 优化数据库表
+     */
+    public function optimizeTables() {
+        try {
+            $tables = ['admins', 'website_submissions', 'app_submissions', 'ip_limits'];
+            
+            foreach ($tables as $table) {
+                $sql = "OPTIMIZE TABLE {$table}";
+                $stmt = $this->db->prepare($sql);
+                $stmt->execute();
+            }
+            
+            $this->log("数据库表优化完成");
+            return true;
+        } catch (Exception $e) {
+            $this->log("数据库表优化失败: " . $e->getMessage(), 'ERROR');
+            return false;
+        }
+    }
+    
+    /**
+     * 获取数据库统计信息
+     */
+    public function getStatistics() {
+        try {
+            $stats = [];
+            
+            // 统计各表记录数
+            $tables = [
+                'website_submissions' => '网址投稿',
+                'app_submissions' => 'APP投稿',
+                'ip_limits' => 'IP限制记录',
+                'admins' => '管理员账户'
+            ];
+            
+            foreach ($tables as $table => $name) {
+                $sql = "SELECT COUNT(*) as count FROM {$table}";
+                $stmt = $this->db->prepare($sql);
+                $stmt->execute();
+                $result = $stmt->fetch(PDO::FETCH_ASSOC);
+                $stats[$name] = $result['count'];
+            }
+            
+            // 统计各状态的投稿数量
+            $statusStats = [];
+            $statuses = ['pending' => '待处理', 'approved' => '已通过', 'rejected' => '已拒绝'];
+            
+            foreach ($statuses as $status => $name) {
+                // 网址投稿
+                $sql = "SELECT COUNT(*) as count FROM website_submissions WHERE status = ?";
+                $stmt = $this->db->prepare($sql);
+                $stmt->execute([$status]);
+                $result = $stmt->fetch(PDO::FETCH_ASSOC);
+                $statusStats["网址投稿-{$name}"] = $result['count'];
+                
+                // APP投稿
+                $sql = "SELECT COUNT(*) as count FROM app_submissions WHERE status = ?";
+                $stmt = $this->db->prepare($sql);
+                $stmt->execute([$status]);
+                $result = $stmt->fetch(PDO::FETCH_ASSOC);
+                $statusStats["APP投稿-{$name}"] = $result['count'];
+            }
+            
+            return array_merge($stats, $statusStats);
+        } catch (Exception $e) {
+            $this->log("获取统计信息失败: " . $e->getMessage(), 'ERROR');
+            return false;
+        }
+    }
+    
+    /**
+     * 记录日志
+     */
+    private function log($message, $level = 'INFO') {
+        $timestamp = date('Y-m-d H:i:s');
+        $logMessage = "[{$timestamp}] [{$level}] {$message}" . PHP_EOL;
+        
+        // 输出到控制台
+        echo $logMessage;
+        
+        // 写入日志文件
+        $logFile = 'data/cleanup.log';
+        if (!file_exists('data')) {
+            mkdir('data', 0755, true);
+        }
+        file_put_contents($logFile, $logMessage, FILE_APPEND | LOCK_EX);
+    }
+    
+    /**
+     * 执行完整的清理流程
+     */
+    public function runFullCleanup() {
+        $this->log("开始执行数据清理任务");
+        
+        // 显示清理前的统计信息
+        $beforeStats = $this->getStatistics();
+        if ($beforeStats) {
+            $this->log("清理前统计信息:");
+            foreach ($beforeStats as $key => $value) {
+                $this->log("  {$key}: {$value}");
+            }
+        }
+        
+        // 执行清理任务
+        $ipCleanup = $this->cleanupIPLimits();
+        $submissionCleanup = $this->cleanupOldSubmissions();
+        $optimize = $this->optimizeTables();
+        
+        // 显示清理后的统计信息
+        $afterStats = $this->getStatistics();
+        if ($afterStats) {
+            $this->log("清理后统计信息:");
+            foreach ($afterStats as $key => $value) {
+                $this->log("  {$key}: {$value}");
+            }
+        }
+        
+        $this->log("数据清理任务完成");
+        
+        return [
+            'ip_cleanup' => $ipCleanup,
+            'submission_cleanup' => $submissionCleanup,
+            'optimize' => $optimize,
+            'before_stats' => $beforeStats,
+            'after_stats' => $afterStats
+        ];
+    }
+}
+
+// 如果直接运行此脚本
+if (php_sapi_name() === 'cli' || !isset($_SERVER['HTTP_HOST'])) {
+    $cleanup = new DataCleanup();
+    $result = $cleanup->runFullCleanup();
+    
+    echo "\n清理任务执行完成!\n";
+    if ($result['ip_cleanup'] !== false) {
+        echo "IP限制记录清理: {$result['ip_cleanup']} 条\n";
+    }
+    if ($result['submission_cleanup'] !== false) {
+        echo "投稿记录清理: 网址 {$result['submission_cleanup']['website']} 条, APP {$result['submission_cleanup']['app']} 条\n";
+    }
+    echo "数据库优化: " . ($result['optimize'] ? '成功' : '失败') . "\n";
+} else {
+    // 如果通过Web访问，返回JSON格式结果
+    header('Content-Type: application/json; charset=utf-8');
+    
+    // 简单的安全检查
+    if (!isset($_GET['token']) || $_GET['token'] !== 'cleanup_token_2024') {
+        http_response_code(403);
+        echo json_encode(['error' => '访问被拒绝']);
+        exit;
+    }
+    
+    $cleanup = new DataCleanup();
+    $result = $cleanup->runFullCleanup();
+    
+    echo json_encode([
+        'success' => true,
+        'message' => '清理任务执行完成',
+        'data' => $result
+    ], JSON_UNESCAPED_UNICODE);
+}
+?>
\ No newline at end of file
diff --git a/config/database.php b/config/database.php
new file mode 100644
index 0000000..a201149
--- /dev/null
+++ b/config/database.php
@@ -0,0 +1,147 @@
+<?php
+/**
+ * 数据库配置文件
+ * 支持MySQL和SQLite数据库
+ */
+
+class Database {
+    private $host = 'localhost';
+    private $db_name = 'submission_system';
+    private $username = 'root';
+    private $password = '';
+    private $conn;
+    private $use_sqlite = false; // 设置为true使用SQLite
+    
+    public function getConnection() {
+        $this->conn = null;
+        
+        try {
+            if ($this->use_sqlite) {
+                // SQLite配置
+                $this->conn = new PDO('sqlite:' . __DIR__ . '/../data/database.sqlite');
+            } else {
+                // MySQL配置
+                $this->conn = new PDO(
+                    "mysql:host=" . $this->host . ";dbname=" . $this->db_name . ";charset=utf8mb4",
+                    $this->username,
+                    $this->password
+                );
+            }
+            $this->conn->setAttribute(PDO::ATTR_ERRMODE, PDO::ERRMODE_EXCEPTION);
+            $this->conn->setAttribute(PDO::ATTR_DEFAULT_FETCH_MODE, PDO::FETCH_ASSOC);
+        } catch(PDOException $exception) {
+            echo "连接失败: " . $exception->getMessage();
+        }
+        
+        return $this->conn;
+    }
+    
+    public function initDatabase() {
+        $conn = $this->getConnection();
+        
+        // 创建管理员表
+        $admin_table = "
+            CREATE TABLE IF NOT EXISTS admins (
+                id INT AUTO_INCREMENT PRIMARY KEY,
+                username VARCHAR(50) UNIQUE NOT NULL,
+                password VARCHAR(255) NOT NULL,
+                created_at TIMESTAMP DEFAULT CURRENT_TIMESTAMP
+            )
+        ";
+        
+        // 创建网址投稿表
+        $website_table = "
+            CREATE TABLE IF NOT EXISTS website_submissions (
+                id INT AUTO_INCREMENT PRIMARY KEY,
+                url VARCHAR(500) NOT NULL,
+                title VARCHAR(200),
+                description TEXT,
+                keywords VARCHAR(500),
+                platforms TEXT,
+                contact VARCHAR(100),
+                ip_address VARCHAR(45) NOT NULL,
+                status ENUM('pending', 'approved', 'rejected') DEFAULT 'pending',
+                admin_note TEXT,
+                created_at TIMESTAMP DEFAULT CURRENT_TIMESTAMP,
+                updated_at TIMESTAMP DEFAULT CURRENT_TIMESTAMP ON UPDATE CURRENT_TIMESTAMP
+            )
+        ";
+        
+        // 创建APP/软件投稿表
+        $app_table = "
+            CREATE TABLE IF NOT EXISTS app_submissions (
+                id INT AUTO_INCREMENT PRIMARY KEY,
+                name VARCHAR(200) NOT NULL,
+                platform VARCHAR(100) NOT NULL,
+                version VARCHAR(50),
+                icon_url VARCHAR(500),
+                download_url VARCHAR(500),
+                website_url VARCHAR(500),
+                description TEXT,
+                platforms TEXT,
+                contact VARCHAR(100),
+                ip_address VARCHAR(45) NOT NULL,
+                status ENUM('pending', 'approved', 'rejected') DEFAULT 'pending',
+                admin_note TEXT,
+                created_at TIMESTAMP DEFAULT CURRENT_TIMESTAMP,
+                updated_at TIMESTAMP DEFAULT CURRENT_TIMESTAMP ON UPDATE CURRENT_TIMESTAMP
+            )
+        ";
+        
+        // 创建IP限制表
+        $ip_limit_table = "
+            CREATE TABLE IF NOT EXISTS ip_submissions (
+                id INT AUTO_INCREMENT PRIMARY KEY,
+                ip_address VARCHAR(45) NOT NULL,
+                submission_date DATE NOT NULL,
+                count INT DEFAULT 1,
+                UNIQUE KEY unique_ip_date (ip_address, submission_date)
+            )
+        ";
+        
+        if ($this->use_sqlite) {
+            // SQLite语法调整
+            $admin_table = str_replace('AUTO_INCREMENT', '', $admin_table);
+            $admin_table = str_replace('INT AUTO_INCREMENT PRIMARY KEY', 'INTEGER PRIMARY KEY AUTOINCREMENT', $admin_table);
+            $admin_table = str_replace('TIMESTAMP DEFAULT CURRENT_TIMESTAMP', 'DATETIME DEFAULT CURRENT_TIMESTAMP', $admin_table);
+            
+            $website_table = str_replace('AUTO_INCREMENT', '', $website_table);
+            $website_table = str_replace('INT AUTO_INCREMENT PRIMARY KEY', 'INTEGER PRIMARY KEY AUTOINCREMENT', $website_table);
+            $website_table = str_replace('ENUM(\'pending\', \'approved\', \'rejected\')', 'TEXT CHECK(status IN (\'pending\', \'approved\', \'rejected\'))', $website_table);
+            $website_table = str_replace('TIMESTAMP DEFAULT CURRENT_TIMESTAMP', 'DATETIME DEFAULT CURRENT_TIMESTAMP', $website_table);
+            $website_table = str_replace('ON UPDATE CURRENT_TIMESTAMP', '', $website_table);
+            
+            $app_table = str_replace('AUTO_INCREMENT', '', $app_table);
+            $app_table = str_replace('INT AUTO_INCREMENT PRIMARY KEY', 'INTEGER PRIMARY KEY AUTOINCREMENT', $app_table);
+            $app_table = str_replace('ENUM(\'pending\', \'approved\', \'rejected\')', 'TEXT CHECK(status IN (\'pending\', \'approved\', \'rejected\'))', $app_table);
+            $app_table = str_replace('TIMESTAMP DEFAULT CURRENT_TIMESTAMP', 'DATETIME DEFAULT CURRENT_TIMESTAMP', $app_table);
+            $app_table = str_replace('ON UPDATE CURRENT_TIMESTAMP', '', $app_table);
+            
+            $ip_limit_table = str_replace('AUTO_INCREMENT', '', $ip_limit_table);
+            $ip_limit_table = str_replace('INT AUTO_INCREMENT PRIMARY KEY', 'INTEGER PRIMARY KEY AUTOINCREMENT', $ip_limit_table);
+        }
+        
+        try {
+            $conn->exec($admin_table);
+            $conn->exec($website_table);
+            $conn->exec($app_table);
+            $conn->exec($ip_limit_table);
+            
+            // 插入默认管理员账户
+            $check_admin = $conn->prepare("SELECT COUNT(*) FROM admins WHERE username = 'admin'");
+            $check_admin->execute();
+            
+            if ($check_admin->fetchColumn() == 0) {
+                $default_password = password_hash('admin', PASSWORD_DEFAULT);
+                $insert_admin = $conn->prepare("INSERT INTO admins (username, password) VALUES ('admin', ?)");
+                $insert_admin->execute([$default_password]);
+            }
+            
+            return true;
+        } catch(PDOException $e) {
+            echo "数据库初始化失败: " . $e->getMessage();
+            return false;
+        }
+    }
+}
+?>
\ No newline at end of file
diff --git a/includes/utils.php b/includes/utils.php
new file mode 100644
index 0000000..e5bfc0d
--- /dev/null
+++ b/includes/utils.php
@@ -0,0 +1,266 @@
+<?php
+/**
+ * 工具类文件
+ * 包含URL抓取、重复检测、IP限制等功能
+ */
+
+class Utils {
+    private $db;
+    
+    public function __construct($database) {
+        $this->db = $database;
+    }
+    
+    /**
+     * 获取网站TDK信息
+     */
+    public function getWebsiteInfo($url) {
+        // 确保URL包含协议
+        if (!preg_match('/^https?:\/\//i', $url)) {
+            $url = 'http://' . $url;
+        }
+        
+        $result = [
+            'title' => '',
+            'description' => '',
+            'keywords' => '',
+            'url' => $url,
+            'success' => false
+        ];
+        
+        try {
+            $context = stream_context_create([
+                'http' => [
+                    'timeout' => 10,
+                    'user_agent' => 'Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/91.0.4472.124 Safari/537.36'
+                ]
+            ]);
+            
+            $html = @file_get_contents($url, false, $context);
+            
+            if ($html === false) {
+                return $result;
+            }
+            
+            // 转换编码
+            $html = mb_convert_encoding($html, 'UTF-8', 'auto');
+            
+            // 解析HTML
+            $dom = new DOMDocument();
+            @$dom->loadHTML($html, LIBXML_HTML_NOIMPLIED | LIBXML_HTML_NODEFDTD);
+            
+            // 获取title
+            $titles = $dom->getElementsByTagName('title');
+            if ($titles->length > 0) {
+                $result['title'] = trim($titles->item(0)->textContent);
+            }
+            
+            // 获取meta标签
+            $metas = $dom->getElementsByTagName('meta');
+            foreach ($metas as $meta) {
+                $name = $meta->getAttribute('name');
+                $property = $meta->getAttribute('property');
+                $content = $meta->getAttribute('content');
+                
+                if (strtolower($name) === 'description' || strtolower($property) === 'og:description') {
+                    if (empty($result['description'])) {
+                        $result['description'] = trim($content);
+                    }
+                }
+                
+                if (strtolower($name) === 'keywords') {
+                    $result['keywords'] = trim($content);
+                }
+            }
+            
+            $result['success'] = true;
+            
+        } catch (Exception $e) {
+            // 静默处理错误
+        }
+        
+        return $result;
+    }
+    
+    /**
+     * 检查IP提交限制
+     */
+    public function checkIPLimit($ip) {
+        $today = date('Y-m-d');
+        
+        $stmt = $this->db->prepare("
+            SELECT count FROM ip_submissions 
+            WHERE ip_address = ? AND submission_date = ?
+        ");
+        $stmt->execute([$ip, $today]);
+        $result = $stmt->fetch();
+        
+        if ($result) {
+            return $result['count'] < 3;
+        }
+        
+        return true;
+    }
+    
+    /**
+     * 记录IP提交
+     */
+    public function recordIPSubmission($ip) {
+        $today = date('Y-m-d');
+        
+        $stmt = $this->db->prepare("
+            INSERT INTO ip_submissions (ip_address, submission_date, count) 
+            VALUES (?, ?, 1) 
+            ON DUPLICATE KEY UPDATE count = count + 1
+        ");
+        
+        try {
+            $stmt->execute([$ip, $today]);
+        } catch (PDOException $e) {
+            // SQLite兼容处理
+            $check = $this->db->prepare("
+                SELECT count FROM ip_submissions 
+                WHERE ip_address = ? AND submission_date = ?
+            ");
+            $check->execute([$ip, $today]);
+            $existing = $check->fetch();
+            
+            if ($existing) {
+                $update = $this->db->prepare("
+                    UPDATE ip_submissions 
+                    SET count = count + 1 
+                    WHERE ip_address = ? AND submission_date = ?
+                ");
+                $update->execute([$ip, $today]);
+            } else {
+                $insert = $this->db->prepare("
+                    INSERT INTO ip_submissions (ip_address, submission_date, count) 
+                    VALUES (?, ?, 1)
+                ");
+                $insert->execute([$ip, $today]);
+            }
+        }
+    }
+    
+    /**
+     * 检查网址重复
+     */
+    public function checkWebsiteDuplicate($url) {
+        // 标准化URL
+        $normalized_url = $this->normalizeUrl($url);
+        $domain = $this->extractDomain($url);
+        
+        $stmt = $this->db->prepare("
+            SELECT id FROM website_submissions 
+            WHERE url = ? OR url LIKE ?
+        ");
+        $stmt->execute([$normalized_url, '%' . $domain . '%']);
+        
+        return $stmt->fetch() !== false;
+    }
+    
+    /**
+     * 检查APP重复
+     */
+    public function checkAppDuplicate($name, $platform) {
+        $stmt = $this->db->prepare("
+            SELECT id FROM app_submissions 
+            WHERE name = ? AND platform = ?
+        ");
+        $stmt->execute([$name, $platform]);
+        
+        return $stmt->fetch() !== false;
+    }
+    
+    /**
+     * 标准化URL
+     */
+    private function normalizeUrl($url) {
+        // 移除协议
+        $url = preg_replace('/^https?:\/\//i', '', $url);
+        // 移除www
+        $url = preg_replace('/^www\./i', '', $url);
+        // 移除尾部斜杠
+        $url = rtrim($url, '/');
+        // 转换为小写
+        $url = strtolower($url);
+        
+        return $url;
+    }
+    
+    /**
+     * 提取域名
+     */
+    private function extractDomain($url) {
+        $parsed = parse_url($url);
+        $host = isset($parsed['host']) ? $parsed['host'] : $url;
+        
+        // 移除www
+        $host = preg_replace('/^www\./i', '', $host);
+        
+        return strtolower($host);
+    }
+    
+    /**
+     * 获取客户端IP
+     */
+    public static function getClientIP() {
+        $ip_keys = ['HTTP_X_FORWARDED_FOR', 'HTTP_X_REAL_IP', 'HTTP_CLIENT_IP', 'REMOTE_ADDR'];
+        
+        foreach ($ip_keys as $key) {
+            if (!empty($_SERVER[$key])) {
+                $ip = $_SERVER[$key];
+                if (strpos($ip, ',') !== false) {
+                    $ip = trim(explode(',', $ip)[0]);
+                }
+                if (filter_var($ip, FILTER_VALIDATE_IP, FILTER_FLAG_NO_PRIV_RANGE | FILTER_FLAG_NO_RES_RANGE)) {
+                    return $ip;
+                }
+            }
+        }
+        
+        return $_SERVER['REMOTE_ADDR'] ?? '127.0.0.1';
+    }
+    
+    /**
+     * 生成验证码
+     */
+    public static function generateCaptcha() {
+        session_start();
+        
+        $code = '';
+        $chars = 'ABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789';
+        for ($i = 0; $i < 4; $i++) {
+            $code .= $chars[rand(0, strlen($chars) - 1)];
+        }
+        
+        $_SESSION['captcha'] = $code;
+        
+        // 创建图片
+        $image = imagecreate(100, 40);
+        $bg_color = imagecolorallocate($image, 255, 255, 255);
+        $text_color = imagecolorallocate($image, 0, 0, 0);
+        $line_color = imagecolorallocate($image, 200, 200, 200);
+        
+        // 添加干扰线
+        for ($i = 0; $i < 5; $i++) {
+            imageline($image, rand(0, 100), rand(0, 40), rand(0, 100), rand(0, 40), $line_color);
+        }
+        
+        // 添加文字
+        imagestring($image, 5, 25, 12, $code, $text_color);
+        
+        header('Content-Type: image/png');
+        imagepng($image);
+        imagedestroy($image);
+    }
+    
+    /**
+     * 验证验证码
+     */
+    public static function verifyCaptcha($input) {
+        session_start();
+        return isset($_SESSION['captcha']) && strtoupper($input) === $_SESSION['captcha'];
+    }
+}
+?>
\ No newline at end of file
diff --git a/index.php b/index.php
new file mode 100644
index 0000000..f8741a8
--- /dev/null
+++ b/index.php
@@ -0,0 +1,580 @@
+<?php
+require_once 'config/database.php';
+require_once 'includes/utils.php';
+
+$database = new Database();
+$db = $database->getConnection();
+$utils = new Utils($db);
+
+// 初始化数据库
+$database->initDatabase();
+
+$message = '';
+$message_type = '';
+
+if ($_SERVER['REQUEST_METHOD'] === 'POST') {
+    $ip = Utils::getClientIP();
+    
+    // 检查IP限制
+    if (!$utils->checkIPLimit($ip)) {
+        $message = '您今天的提交次数已达上限（3次），请明天再试。';
+        $message_type = 'error';
+    } else {
+        $submission_type = $_POST['submission_type'] ?? 'website';
+        
+        if ($submission_type === 'website') {
+            // 网址投稿处理
+            $url = trim($_POST['url'] ?? '');
+            $title = trim($_POST['title'] ?? '');
+            $description = trim($_POST['description'] ?? '');
+            $keywords = trim($_POST['keywords'] ?? '');
+            $platforms = isset($_POST['platforms']) ? implode(',', $_POST['platforms']) : '';
+            $contact = trim($_POST['contact'] ?? '');
+            
+            if (empty($url)) {
+                $message = '请输入网址URL。';
+                $message_type = 'error';
+            } elseif ($utils->checkWebsiteDuplicate($url)) {
+                $message = '该网址已存在，请勿重复提交。';
+                $message_type = 'error';
+            } else {
+                try {
+                    $stmt = $db->prepare("
+                        INSERT INTO website_submissions (url, title, description, keywords, platforms, contact, ip_address) 
+                        VALUES (?, ?, ?, ?, ?, ?, ?)
+                    ");
+                    $stmt->execute([$url, $title, $description, $keywords, $platforms, $contact, $ip]);
+                    
+                    $utils->recordIPSubmission($ip);
+                    $message = '提交成功！我们会尽快审核您的内容。';
+                    $message_type = 'success';
+                } catch (PDOException $e) {
+                    $message = '提交失败，请稍后重试。';
+                    $message_type = 'error';
+                }
+            }
+        } else {
+            // APP投稿处理
+            $name = trim($_POST['app_name'] ?? '');
+            $platform = trim($_POST['app_platform'] ?? '');
+            $version = trim($_POST['app_version'] ?? '');
+            $icon_url = trim($_POST['icon_url'] ?? '');
+            $download_url = trim($_POST['download_url'] ?? '');
+            $website_url = trim($_POST['website_url'] ?? '');
+            $description = trim($_POST['app_description'] ?? '');
+            $platforms = isset($_POST['platforms']) ? implode(',', $_POST['platforms']) : '';
+            $contact = trim($_POST['contact'] ?? '');
+            
+            if (empty($name) || empty($platform)) {
+                $message = '请填写应用名称和系统平台。';
+                $message_type = 'error';
+            } elseif ($utils->checkAppDuplicate($name, $platform)) {
+                $message = '该应用已存在，请勿重复提交。';
+                $message_type = 'error';
+            } else {
+                try {
+                    $stmt = $db->prepare("
+                        INSERT INTO app_submissions (name, platform, version, icon_url, download_url, website_url, description, platforms, contact, ip_address) 
+                        VALUES (?, ?, ?, ?, ?, ?, ?, ?, ?, ?)
+                    ");
+                    $stmt->execute([$name, $platform, $version, $icon_url, $download_url, $website_url, $description, $platforms, $contact, $ip]);
+                    
+                    $utils->recordIPSubmission($ip);
+                    $message = '提交成功！我们会尽快审核您的内容。';
+                    $message_type = 'success';
+                } catch (PDOException $e) {
+                    $message = '提交失败，请稍后重试。';
+                    $message_type = 'error';
+                }
+            }
+        }
+    }
+}
+?>
+
+<!DOCTYPE html>
+<html lang="zh-CN">
+<head>
+    <meta charset="UTF-8">
+    <meta name="viewport" content="width=device-width, initial-scale=1.0">
+    <title>内容投稿系统</title>
+    <link href="https://cdnjs.cloudflare.com/ajax/libs/font-awesome/6.0.0/css/all.min.css" rel="stylesheet">
+    <style>
+        * {
+            margin: 0;
+            padding: 0;
+            box-sizing: border-box;
+        }
+        
+        body {
+            font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
+            background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
+            min-height: 100vh;
+            padding: 20px;
+        }
+        
+        .container {
+            max-width: 800px;
+            margin: 0 auto;
+            background: rgba(255, 255, 255, 0.95);
+            border-radius: 20px;
+            box-shadow: 0 20px 40px rgba(0, 0, 0, 0.1);
+            overflow: hidden;
+            backdrop-filter: blur(10px);
+        }
+        
+        .header {
+            background: linear-gradient(135deg, #4f46e5 0%, #7c3aed 100%);
+            color: white;
+            padding: 40px;
+            text-align: center;
+        }
+        
+        .header h1 {
+            font-size: 2.5rem;
+            font-weight: 700;
+            margin-bottom: 10px;
+        }
+        
+        .header p {
+            font-size: 1.1rem;
+            opacity: 0.9;
+        }
+        
+        .tab-container {
+            display: flex;
+            background: #f8fafc;
+            border-bottom: 1px solid #e2e8f0;
+        }
+        
+        .tab {
+            flex: 1;
+            padding: 20px;
+            text-align: center;
+            cursor: pointer;
+            font-weight: 600;
+            color: #64748b;
+            transition: all 0.3s ease;
+            border-bottom: 3px solid transparent;
+        }
+        
+        .tab.active {
+            color: #4f46e5;
+            background: white;
+            border-bottom-color: #4f46e5;
+        }
+        
+        .tab:hover {
+            background: #f1f5f9;
+        }
+        
+        .form-container {
+            padding: 40px;
+        }
+        
+        .form-section {
+            display: none;
+        }
+        
+        .form-section.active {
+            display: block;
+        }
+        
+        .form-group {
+            margin-bottom: 25px;
+        }
+        
+        .form-group label {
+            display: block;
+            margin-bottom: 8px;
+            font-weight: 600;
+            color: #374151;
+        }
+        
+        .form-group input,
+        .form-group textarea,
+        .form-group select {
+            width: 100%;
+            padding: 12px 16px;
+            border: 2px solid #e5e7eb;
+            border-radius: 10px;
+            font-size: 16px;
+            transition: all 0.3s ease;
+            background: #fafafa;
+        }
+        
+        .form-group input:focus,
+        .form-group textarea:focus,
+        .form-group select:focus {
+            outline: none;
+            border-color: #4f46e5;
+            background: white;
+            box-shadow: 0 0 0 3px rgba(79, 70, 229, 0.1);
+        }
+        
+        .form-group textarea {
+            resize: vertical;
+            min-height: 100px;
+        }
+        
+        .checkbox-group {
+            display: flex;
+            flex-wrap: wrap;
+            gap: 15px;
+            margin-top: 10px;
+        }
+        
+        .checkbox-item {
+            display: flex;
+            align-items: center;
+            gap: 8px;
+        }
+        
+        .checkbox-item input[type="checkbox"] {
+            width: auto;
+            margin: 0;
+        }
+        
+        .platform-warning {
+            margin-top: 10px;
+            padding: 12px;
+            border-radius: 8px;
+            font-size: 14px;
+            display: none;
+        }
+        
+        .platform-warning.compliance {
+            background: #fef3c7;
+            color: #92400e;
+            border: 1px solid #fbbf24;
+        }
+        
+        .platform-warning.loose {
+            background: #dbeafe;
+            color: #1e40af;
+            border: 1px solid #60a5fa;
+        }
+        
+        .btn-group {
+            display: flex;
+            gap: 15px;
+            margin-top: 30px;
+        }
+        
+        .btn {
+            padding: 12px 24px;
+            border: none;
+            border-radius: 10px;
+            font-size: 16px;
+            font-weight: 600;
+            cursor: pointer;
+            transition: all 0.3s ease;
+            display: flex;
+            align-items: center;
+            gap: 8px;
+        }
+        
+        .btn-primary {
+            background: linear-gradient(135deg, #4f46e5 0%, #7c3aed 100%);
+            color: white;
+            flex: 1;
+        }
+        
+        .btn-primary:hover {
+            transform: translateY(-2px);
+            box-shadow: 0 10px 20px rgba(79, 70, 229, 0.3);
+        }
+        
+        .btn-secondary {
+            background: #f1f5f9;
+            color: #64748b;
+            border: 2px solid #e2e8f0;
+        }
+        
+        .btn-secondary:hover {
+            background: #e2e8f0;
+        }
+        
+        .message {
+            padding: 15px;
+            border-radius: 10px;
+            margin-bottom: 20px;
+            font-weight: 500;
+        }
+        
+        .message.success {
+            background: #d1fae5;
+            color: #065f46;
+            border: 1px solid #10b981;
+        }
+        
+        .message.error {
+            background: #fee2e2;
+            color: #991b1b;
+            border: 1px solid #ef4444;
+        }
+        
+        .url-fetch {
+            display: flex;
+            gap: 10px;
+            align-items: end;
+        }
+        
+        .url-fetch input {
+            flex: 1;
+        }
+        
+        .url-fetch button {
+            white-space: nowrap;
+        }
+        
+        @media (max-width: 768px) {
+            .container {
+                margin: 10px;
+                border-radius: 15px;
+            }
+            
+            .header {
+                padding: 30px 20px;
+            }
+            
+            .header h1 {
+                font-size: 2rem;
+            }
+            
+            .form-container {
+                padding: 30px 20px;
+            }
+            
+            .btn-group {
+                flex-direction: column;
+            }
+            
+            .url-fetch {
+                flex-direction: column;
+            }
+        }
+    </style>
+</head>
+<body>
+    <div class="container">
+        <div class="header">
+            <h1><i class="fas fa-paper-plane"></i> 内容投稿系统</h1>
+            <p>分享优质内容，共建互联网生态</p>
+        </div>
+        
+        <div class="tab-container">
+            <div class="tab active" onclick="switchTab('website')">
+                <i class="fas fa-globe"></i> 网址投稿
+            </div>
+            <div class="tab" onclick="switchTab('app')">
+                <i class="fas fa-mobile-alt"></i> APP/软件投稿
+            </div>
+        </div>
+        
+        <div class="form-container">
+            <?php if ($message): ?>
+                <div class="message <?php echo $message_type; ?>">
+                    <?php echo htmlspecialchars($message); ?>
+                </div>
+            <?php endif; ?>
+            
+            <form method="POST" id="submissionForm">
+                <input type="hidden" name="submission_type" id="submission_type" value="website">
+                
+                <!-- 网址投稿表单 -->
+                <div class="form-section active" id="website-form">
+                    <div class="form-group">
+                        <label for="url">网址URL *</label>
+                        <div class="url-fetch">
+                            <input type="url" id="url" name="url" placeholder="https://example.com" required>
+                            <button type="button" class="btn btn-secondary" onclick="fetchWebsiteInfo()">
+                                <i class="fas fa-download"></i> 获取信息
+                            </button>
+                        </div>
+                    </div>
+                    
+                    <div class="form-group">
+                        <label for="title">网站名称</label>
+                        <input type="text" id="title" name="title" placeholder="网站标题">
+                    </div>
+                    
+                    <div class="form-group">
+                        <label for="description">网站描述</label>
+                        <textarea id="description" name="description" placeholder="网站描述信息"></textarea>
+                    </div>
+                    
+                    <div class="form-group">
+                        <label for="keywords">关键词</label>
+                        <input type="text" id="keywords" name="keywords" placeholder="关键词，用逗号分隔">
+                    </div>
+                </div>
+                
+                <!-- APP投稿表单 -->
+                <div class="form-section" id="app-form">
+                    <div class="form-group">
+                        <label for="app_name">应用名称 *</label>
+                        <input type="text" id="app_name" name="app_name" placeholder="应用名称">
+                    </div>
+                    
+                    <div class="form-group">
+                        <label for="app_platform">系统平台 *</label>
+                        <select id="app_platform" name="app_platform">
+                            <option value="">请选择平台</option>
+                            <option value="Windows">Windows</option>
+                            <option value="macOS">macOS</option>
+                            <option value="Linux">Linux</option>
+                            <option value="Android">Android</option>
+                            <option value="iOS">iOS</option>
+                            <option value="Web">Web应用</option>
+                            <option value="跨平台">跨平台</option>
+                        </select>
+                    </div>
+                    
+                    <div class="form-group">
+                        <label for="app_version">版本号</label>
+                        <input type="text" id="app_version" name="app_version" placeholder="v1.0.0">
+                    </div>
+                    
+                    <div class="form-group">
+                        <label for="icon_url">图标地址</label>
+                        <input type="url" id="icon_url" name="icon_url" placeholder="https://example.com/icon.png">
+                    </div>
+                    
+                    <div class="form-group">
+                        <label for="download_url">下载链接</label>
+                        <input type="url" id="download_url" name="download_url" placeholder="https://example.com/download">
+                    </div>
+                    
+                    <div class="form-group">
+                        <label for="website_url">官网/落地页</label>
+                        <input type="url" id="website_url" name="website_url" placeholder="https://example.com">
+                    </div>
+                    
+                    <div class="form-group">
+                        <label for="app_description">应用描述</label>
+                        <textarea id="app_description" name="app_description" placeholder="应用功能描述"></textarea>
+                    </div>
+                </div>
+                
+                <!-- 公共字段 -->
+                <div class="form-group">
+                    <label>收录平台</label>
+                    <div class="checkbox-group">
+                        <div class="checkbox-item">
+                            <input type="checkbox" id="platform1" name="platforms[]" value="自媒体维基" onchange="checkPlatforms()">
+                            <label for="platform1">自媒体维基</label>
+                        </div>
+                        <div class="checkbox-item">
+                            <input type="checkbox" id="platform2" name="platforms[]" value="zTab" onchange="checkPlatforms()">
+                            <label for="platform2">zTab</label>
+                        </div>
+                        <div class="checkbox-item">
+                            <input type="checkbox" id="platform3" name="platforms[]" value="SOSO" onchange="checkPlatforms()">
+                            <label for="platform3">SOSO</label>
+                        </div>
+                    </div>
+                    <div class="platform-warning compliance" id="compliance-warning">
+                        <i class="fas fa-exclamation-triangle"></i> 提醒：自媒体维基和zTab平台需要合法合规的内容，请确保您提交的内容符合相关法律法规。
+                    </div>
+                    <div class="platform-warning loose" id="loose-warning">
+                        <i class="fas fa-info-circle"></i> 提醒：SOSO平台内容审查相对宽松，但仍需遵守基本的网络道德规范。
+                    </div>
+                </div>
+                
+                <div class="form-group">
+                    <label for="contact">联系方式（可选）</label>
+                    <input type="text" id="contact" name="contact" placeholder="邮箱或其他联系方式">
+                </div>
+                
+                <div class="btn-group">
+                    <button type="submit" class="btn btn-primary">
+                        <i class="fas fa-paper-plane"></i> 提交投稿
+                    </button>
+                </div>
+            </form>
+        </div>
+    </div>
+    
+    <script>
+        function switchTab(type) {
+            // 切换标签
+            document.querySelectorAll('.tab').forEach(tab => tab.classList.remove('active'));
+            event.target.closest('.tab').classList.add('active');
+            
+            // 切换表单
+            document.querySelectorAll('.form-section').forEach(section => section.classList.remove('active'));
+            document.getElementById(type + '-form').classList.add('active');
+            
+            // 更新提交类型
+            document.getElementById('submission_type').value = type;
+            
+            // 更新必填字段
+            updateRequiredFields(type);
+        }
+        
+        function updateRequiredFields(type) {
+            // 清除所有必填
+            document.querySelectorAll('input[required], select[required]').forEach(field => {
+                field.removeAttribute('required');
+            });
+            
+            if (type === 'website') {
+                document.getElementById('url').setAttribute('required', 'required');
+            } else {
+                document.getElementById('app_name').setAttribute('required', 'required');
+                document.getElementById('app_platform').setAttribute('required', 'required');
+            }
+        }
+        
+        function checkPlatforms() {
+            const compliance = document.querySelectorAll('#platform1:checked, #platform2:checked').length > 0;
+            const loose = document.querySelector('#platform3:checked');
+            
+            document.getElementById('compliance-warning').style.display = compliance ? 'block' : 'none';
+            document.getElementById('loose-warning').style.display = loose ? 'block' : 'none';
+        }
+        
+        async function fetchWebsiteInfo() {
+            const url = document.getElementById('url').value;
+            if (!url) {
+                alert('请先输入网址');
+                return;
+            }
+            
+            const button = event.target;
+            const originalText = button.innerHTML;
+            button.innerHTML = '<i class="fas fa-spinner fa-spin"></i> 获取中...';
+            button.disabled = true;
+            
+            try {
+                const response = await fetch('api/fetch_website_info.php', {
+                    method: 'POST',
+                    headers: {
+                        'Content-Type': 'application/json',
+                    },
+                    body: JSON.stringify({ url: url })
+                });
+                
+                const data = await response.json();
+                
+                if (data.success) {
+                    document.getElementById('title').value = data.title || '';
+                    document.getElementById('description').value = data.description || '';
+                    document.getElementById('keywords').value = data.keywords || '';
+                } else {
+                    alert('获取网站信息失败，请手动填写');
+                }
+            } catch (error) {
+                alert('获取网站信息失败，请手动填写');
+            } finally {
+                button.innerHTML = originalText;
+                button.disabled = false;
+            }
+        }
+        
+        // 初始化
+        updateRequiredFields('website');
+    </script>
+</body>
+</html>
\ No newline at end of file
diff --git a/install.php b/install.php
new file mode 100644
index 0000000..096d8fd
--- /dev/null
+++ b/install.php
@@ -0,0 +1,478 @@
+<?php
+/**
+ * 安装脚本
+ * 用于初始化数据库和检查环境
+ */
+
+$step = $_GET['step'] ?? 1;
+$message = '';
+$message_type = '';
+
+if ($_SERVER['REQUEST_METHOD'] === 'POST') {
+    if ($step == 2) {
+        // 数据库配置测试
+        $db_type = $_POST['db_type'] ?? 'mysql';
+        $host = $_POST['host'] ?? 'localhost';
+        $dbname = $_POST['dbname'] ?? 'submission_system';
+        $username = $_POST['username'] ?? 'root';
+        $password = $_POST['password'] ?? '';
+        
+        try {
+            if ($db_type === 'sqlite') {
+                $pdo = new PDO('sqlite:' . __DIR__ . '/data/database.sqlite');
+                $message = 'SQLite数据库连接成功！';
+                $message_type = 'success';
+                
+                // 更新配置文件
+                $config_content = file_get_contents('config/database.php');
+                $config_content = str_replace('private $use_sqlite = false;', 'private $use_sqlite = true;', $config_content);
+                file_put_contents('config/database.php', $config_content);
+            } else {
+                $pdo = new PDO("mysql:host=$host;dbname=$dbname;charset=utf8mb4", $username, $password);
+                $message = 'MySQL数据库连接成功！';
+                $message_type = 'success';
+                
+                // 更新配置文件
+                $config_content = file_get_contents('config/database.php');
+                $config_content = str_replace("private \$host = 'localhost';", "private \$host = '$host';", $config_content);
+                $config_content = str_replace("private \$db_name = 'submission_system';", "private \$db_name = '$dbname';", $config_content);
+                $config_content = str_replace("private \$username = 'root';", "private \$username = '$username';", $config_content);
+                $config_content = str_replace("private \$password = '';", "private \$password = '$password';", $config_content);
+                file_put_contents('config/database.php', $config_content);
+            }
+            
+            $step = 3;
+        } catch (PDOException $e) {
+            $message = '数据库连接失败: ' . $e->getMessage();
+            $message_type = 'error';
+        }
+    } elseif ($step == 3) {
+        // 初始化数据库
+        require_once 'config/database.php';
+        
+        $database = new Database();
+        if ($database->initDatabase()) {
+            $message = '数据库初始化成功！';
+            $message_type = 'success';
+            $step = 4;
+        } else {
+            $message = '数据库初始化失败！';
+            $message_type = 'error';
+        }
+    }
+}
+
+// 环境检查
+function checkEnvironment() {
+    $checks = [
+        'PHP版本 >= 7.4' => version_compare(PHP_VERSION, '7.4.0', '>='),
+        'PDO扩展' => extension_loaded('pdo'),
+        'PDO MySQL扩展' => extension_loaded('pdo_mysql'),
+        'PDO SQLite扩展' => extension_loaded('pdo_sqlite'),
+        'GD扩展' => extension_loaded('gd'),
+        'cURL扩展' => extension_loaded('curl'),
+        'config目录可写' => is_writable(__DIR__ . '/config'),
+        'data目录可写' => is_writable(__DIR__ . '/data') || mkdir(__DIR__ . '/data', 0755, true)
+    ];
+    
+    return $checks;
+}
+
+$env_checks = checkEnvironment();
+?>
+
+<!DOCTYPE html>
+<html lang="zh-CN">
+<head>
+    <meta charset="UTF-8">
+    <meta name="viewport" content="width=device-width, initial-scale=1.0">
+    <title>安装向导 - 内容投稿系统</title>
+    <link href="https://cdnjs.cloudflare.com/ajax/libs/font-awesome/6.0.0/css/all.min.css" rel="stylesheet">
+    <style>
+        * {
+            margin: 0;
+            padding: 0;
+            box-sizing: border-box;
+        }
+        
+        body {
+            font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
+            background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
+            min-height: 100vh;
+            padding: 20px;
+        }
+        
+        .container {
+            max-width: 600px;
+            margin: 0 auto;
+            background: rgba(255, 255, 255, 0.95);
+            border-radius: 20px;
+            box-shadow: 0 20px 40px rgba(0, 0, 0, 0.1);
+            overflow: hidden;
+            backdrop-filter: blur(10px);
+        }
+        
+        .header {
+            background: linear-gradient(135deg, #4f46e5 0%, #7c3aed 100%);
+            color: white;
+            padding: 40px;
+            text-align: center;
+        }
+        
+        .header h1 {
+            font-size: 2rem;
+            font-weight: 700;
+            margin-bottom: 10px;
+        }
+        
+        .step-indicator {
+            display: flex;
+            justify-content: center;
+            gap: 10px;
+            margin-top: 20px;
+        }
+        
+        .step {
+            width: 30px;
+            height: 30px;
+            border-radius: 50%;
+            background: rgba(255, 255, 255, 0.3);
+            display: flex;
+            align-items: center;
+            justify-content: center;
+            font-weight: 600;
+        }
+        
+        .step.active {
+            background: white;
+            color: #4f46e5;
+        }
+        
+        .step.completed {
+            background: #10b981;
+            color: white;
+        }
+        
+        .content {
+            padding: 40px;
+        }
+        
+        .message {
+            padding: 15px;
+            border-radius: 8px;
+            margin-bottom: 20px;
+            font-weight: 500;
+        }
+        
+        .message.success {
+            background: #d1fae5;
+            color: #065f46;
+            border: 1px solid #10b981;
+        }
+        
+        .message.error {
+            background: #fee2e2;
+            color: #991b1b;
+            border: 1px solid #ef4444;
+        }
+        
+        .check-list {
+            list-style: none;
+            margin-bottom: 20px;
+        }
+        
+        .check-item {
+            display: flex;
+            align-items: center;
+            gap: 10px;
+            padding: 10px 0;
+            border-bottom: 1px solid #e5e7eb;
+        }
+        
+        .check-item:last-child {
+            border-bottom: none;
+        }
+        
+        .check-icon {
+            width: 20px;
+            text-align: center;
+        }
+        
+        .check-icon.success {
+            color: #10b981;
+        }
+        
+        .check-icon.error {
+            color: #ef4444;
+        }
+        
+        .form-group {
+            margin-bottom: 20px;
+        }
+        
+        .form-group label {
+            display: block;
+            margin-bottom: 8px;
+            font-weight: 600;
+            color: #374151;
+        }
+        
+        .form-group input,
+        .form-group select {
+            width: 100%;
+            padding: 12px 16px;
+            border: 2px solid #e5e7eb;
+            border-radius: 8px;
+            font-size: 16px;
+        }
+        
+        .form-group input:focus,
+        .form-group select:focus {
+            outline: none;
+            border-color: #4f46e5;
+        }
+        
+        .btn {
+            padding: 12px 24px;
+            border: none;
+            border-radius: 8px;
+            font-size: 16px;
+            font-weight: 600;
+            cursor: pointer;
+            transition: all 0.3s ease;
+            display: inline-flex;
+            align-items: center;
+            gap: 8px;
+        }
+        
+        .btn-primary {
+            background: linear-gradient(135deg, #4f46e5 0%, #7c3aed 100%);
+            color: white;
+        }
+        
+        .btn-primary:hover {
+            transform: translateY(-2px);
+            box-shadow: 0 10px 20px rgba(79, 70, 229, 0.3);
+        }
+        
+        .btn-success {
+            background: #10b981;
+            color: white;
+        }
+        
+        .btn-success:hover {
+            background: #059669;
+        }
+        
+        .actions {
+            display: flex;
+            gap: 15px;
+            justify-content: center;
+            margin-top: 30px;
+        }
+        
+        .db-option {
+            padding: 20px;
+            border: 2px solid #e5e7eb;
+            border-radius: 8px;
+            margin-bottom: 15px;
+            cursor: pointer;
+            transition: all 0.3s ease;
+        }
+        
+        .db-option:hover {
+            border-color: #4f46e5;
+        }
+        
+        .db-option.selected {
+            border-color: #4f46e5;
+            background: #f0f9ff;
+        }
+        
+        .db-config {
+            display: none;
+            margin-top: 20px;
+            padding: 20px;
+            background: #f8fafc;
+            border-radius: 8px;
+        }
+        
+        .db-config.active {
+            display: block;
+        }
+    </style>
+</head>
+<body>
+    <div class="container">
+        <div class="header">
+            <h1><i class="fas fa-cogs"></i> 安装向导</h1>
+            <p>内容投稿系统安装配置</p>
+            <div class="step-indicator">
+                <div class="step <?php echo $step >= 1 ? ($step > 1 ? 'completed' : 'active') : ''; ?>">1</div>
+                <div class="step <?php echo $step >= 2 ? ($step > 2 ? 'completed' : 'active') : ''; ?>">2</div>
+                <div class="step <?php echo $step >= 3 ? ($step > 3 ? 'completed' : 'active') : ''; ?>">3</div>
+                <div class="step <?php echo $step >= 4 ? 'active' : ''; ?>">4</div>
+            </div>
+        </div>
+        
+        <div class="content">
+            <?php if ($message): ?>
+                <div class="message <?php echo $message_type; ?>">
+                    <?php echo htmlspecialchars($message); ?>
+                </div>
+            <?php endif; ?>
+            
+            <?php if ($step == 1): ?>
+                <!-- 步骤1: 环境检查 -->
+                <h2>环境检查</h2>
+                <p>正在检查服务器环境是否满足运行要求...</p>
+                
+                <ul class="check-list">
+                    <?php foreach ($env_checks as $name => $status): ?>
+                        <li class="check-item">
+                            <div class="check-icon <?php echo $status ? 'success' : 'error'; ?>">
+                                <i class="fas <?php echo $status ? 'fa-check' : 'fa-times'; ?>"></i>
+                            </div>
+                            <span><?php echo $name; ?></span>
+                        </li>
+                    <?php endforeach; ?>
+                </ul>
+                
+                <?php if (array_product($env_checks)): ?>
+                    <div class="actions">
+                        <a href="?step=2" class="btn btn-primary">
+                            <i class="fas fa-arrow-right"></i> 下一步
+                        </a>
+                    </div>
+                <?php else: ?>
+                    <div class="message error">
+                        <i class="fas fa-exclamation-triangle"></i> 
+                        环境检查未通过，请先解决上述问题后再继续安装。
+                    </div>
+                <?php endif; ?>
+                
+            <?php elseif ($step == 2): ?>
+                <!-- 步骤2: 数据库配置 -->
+                <h2>数据库配置</h2>
+                <p>请选择数据库类型并配置连接信息。</p>
+                
+                <form method="POST">
+                    <div class="db-option" onclick="selectDatabase('mysql')">
+                        <h3><i class="fas fa-database"></i> MySQL数据库</h3>
+                        <p>适合生产环境，性能更好，支持并发访问</p>
+                    </div>
+                    
+                    <div class="db-option" onclick="selectDatabase('sqlite')">
+                        <h3><i class="fas fa-file-alt"></i> SQLite数据库</h3>
+                        <p>适合小型站点，无需额外配置，开箱即用</p>
+                    </div>
+                    
+                    <input type="hidden" name="db_type" id="db_type" value="mysql">
+                    
+                    <div class="db-config" id="mysql-config">
+                        <h4>MySQL配置</h4>
+                        <div class="form-group">
+                            <label for="host">数据库主机</label>
+                            <input type="text" name="host" id="host" value="localhost" required>
+                        </div>
+                        <div class="form-group">
+                            <label for="dbname">数据库名称</label>
+                            <input type="text" name="dbname" id="dbname" value="submission_system" required>
+                        </div>
+                        <div class="form-group">
+                            <label for="username">用户名</label>
+                            <input type="text" name="username" id="username" value="root" required>
+                        </div>
+                        <div class="form-group">
+                            <label for="password">密码</label>
+                            <input type="password" name="password" id="password">
+                        </div>
+                    </div>
+                    
+                    <div class="db-config" id="sqlite-config">
+                        <h4>SQLite配置</h4>
+                        <p>SQLite数据库将自动创建在 data/database.sqlite 文件中，无需额外配置。</p>
+                    </div>
+                    
+                    <div class="actions">
+                        <button type="submit" class="btn btn-primary">
+                            <i class="fas fa-check"></i> 测试连接
+                        </button>
+                    </div>
+                </form>
+                
+            <?php elseif ($step == 3): ?>
+                <!-- 步骤3: 初始化数据库 -->
+                <h2>初始化数据库</h2>
+                <p>数据库连接成功！现在将创建必要的数据表。</p>
+                
+                <form method="POST">
+                    <div class="actions">
+                        <button type="submit" class="btn btn-primary">
+                            <i class="fas fa-database"></i> 初始化数据库
+                        </button>
+                    </div>
+                </form>
+                
+            <?php elseif ($step == 4): ?>
+                <!-- 步骤4: 安装完成 -->
+                <h2>安装完成</h2>
+                <div class="message success">
+                    <i class="fas fa-check-circle"></i> 
+                    恭喜！内容投稿系统安装成功！
+                </div>
+                
+                <h3>默认管理员账户</h3>
+                <p><strong>用户名：</strong>admin</p>
+                <p><strong>密码：</strong>admin</p>
+                <p style="color: #ef4444; margin-top: 10px;">⚠️ 请登录后台后立即修改默认密码！</p>
+                
+                <h3>下一步操作</h3>
+                <ul style="margin: 20px 0; padding-left: 20px;">
+                    <li>删除或重命名 install.php 文件以确保安全</li>
+                    <li>配置Web服务器（如Apache、Nginx）</li>
+                    <li>设置适当的文件权限</li>
+                    <li>登录管理后台修改默认密码</li>
+                </ul>
+                
+                <div class="actions">
+                    <a href="index.php" class="btn btn-primary">
+                        <i class="fas fa-home"></i> 访问前台
+                    </a>
+                    <a href="admin/login.php" class="btn btn-success">
+                        <i class="fas fa-shield-alt"></i> 管理后台
+                    </a>
+                </div>
+            <?php endif; ?>
+        </div>
+    </div>
+    
+    <script>
+        function selectDatabase(type) {
+            // 移除所有选中状态
+            document.querySelectorAll('.db-option').forEach(option => {
+                option.classList.remove('selected');
+            });
+            
+            // 隐藏所有配置
+            document.querySelectorAll('.db-config').forEach(config => {
+                config.classList.remove('active');
+            });
+            
+            // 选中当前选项
+            event.currentTarget.classList.add('selected');
+            
+            // 显示对应配置
+            document.getElementById(type + '-config').classList.add('active');
+            
+            // 设置表单值
+            document.getElementById('db_type').value = type;
+        }
+        
+        // 默认选择MySQL
+        document.addEventListener('DOMContentLoaded', function() {
+            document.querySelector('.db-option').click();
+        });
+    </script>
+</body>
+</html>
\ No newline at end of file
diff --git a/需求说明.md b/需求说明.md
new file mode 100644
index 0000000..8f92990
--- /dev/null
+++ b/需求说明.md
@@ -0,0 +1,31 @@
+创建一个投稿系统，需求：
+
+网址投稿系统，能够通过URL快速获取网站的TDK内容，用户在填入网址URL的时候可以兼容http和https的链接。
+
+获取的内容可以快速填入网站名称、网站描述、关键词、网址，另外为了细化到具体投稿至哪个平台，可以增加三个可以多选的选项，分别是：自媒体维基、zTab、SOSO；在用户勾选自媒体维基、zTab时提醒用户，该平台需要合法合规的内容；在勾选SOSO时提醒用户该平台内容审查相当宽松。用户可以选择是否留有联系方式，以便我们后续沟通。方便用户提交，无需注册登录就可以提交，但为了安全起见，每天每个IP最多只能提交三次，且数据库里有相同的内容则提示内容已存在；重复检测可以检测域名，二级域名，网址参数（有更好的方案你可以使用）。
+
+所以用户表单部分的内容应该是：
+
+需要获取信息的URL输入框、网站名称、网站描述、网站关键词、收录平台、联系方式、提交。（如果你有好的思路可以补充完善）
+
+后台可以审核内容，前台提交完成后，可以告诉用户，我们会尽快审核内容。用户提交的内容只会显示在后台和数据库里，通过审核/拒绝的内容不会显示在列表里，默认显示的内容都是待处理的，当然也可以通过选单切换到已经审核的内容，比如审核通过的拒绝的内容。提交页面不会有显示。
+
+后台需要账号密码登录，安全起见，需要增加一个验证码的功能；另外为了方便使用，首次登录默认账号/密码为admin/admin，当admin成功登陆到后台后，提示可以修改账户名称和密码，修改完的信息将写入数据库，然后折叠修改区域。
+
+整体的样式UI需要参考互联网大厂的设计思路，简洁大气现代，配色方面需要统一性但需要比较前沿的方向设计。
+
+补充部分：因为只有网址信息过于单一，可以支持APP、软件的投稿，但投递系统不存储图片和软件包，用户可以在投稿区域切换APP/软件投稿界面。
+
+APP/软件的投稿表单需要用户手动填写软件名称、系统平台、版本号、图标地址、下载链接、落地页/官网。（关于这个部分你可以思考后补充。）
+
+关于APP/软件的投递，后台部分也要分开来显示，网址的部分和APP/软件的不能在同一个列表里显示，因为会导致后台审核区域的信息数据混乱。
+
+APP/软件应该是单独的数据表。
+
+数据库默认使用MySQL，如果部署的环境配置低，可以支持兼容使用SQLite3。
+
+使用开源易部署的方案，我希望整体保持轻量化，我是中学生，所以需要你完成全部的工作。
+
+部署方面，我使用的是宝塔面板部署，所以你要考虑到部署的过程和配置教程等。
+
+最后写一份完整的readme和开源协议。
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