diff --git a/.gitignore b/.gitignore
index be1c71e..0e9e700 100644
--- a/.gitignore
+++ b/.gitignore
@@ -18,6 +18,8 @@ build/
 # Environment variables
 .env
 .env.local
+.env.production
+.env.production.local
 .env.*.local
 
 # IDE
diff --git a/backend/.env.production b/backend/.env.production
index a27588c..da22eeb 100644
--- a/backend/.env.production
+++ b/backend/.env.production
@@ -2,16 +2,20 @@
 NODE_ENV=production
 PORT=5000
 
-# 生产数据库配置
+# 生产数据库配置（请填写实际值，不要提交此文件到版本控制）
 DB_HOST=localhost
 DB_PORT=5432
 DB_NAME=company_finance_db
 DB_USER=finance_user
-DB_PASSWORD=FinanceDB2026!
+DB_PASSWORD=
 
-# 安全配置
-JWT_SECRET=your-production-jwt-secret-key-change-this
-SESSION_SECRET=your-production-session-secret-change-this
+# 安全配置（请填写实际值）
+JWT_SECRET=
+SESSION_SECRET=
+
+# 腾讯云COS配置（请填写实际值）
+TENCENT_SECRET_ID=
+TENCENT_SECRET_KEY=
 
 # 日志配置
 LOG_LEVEL=info
diff --git a/backend/api-complete.js b/backend/api-complete.js
index 4935b23..8557ed5 100644
--- a/backend/api-complete.js
+++ b/backend/api-complete.js
@@ -5,6 +5,7 @@ const multer = require('multer');
 const xlsx = require('xlsx');
 require('dotenv').config();
 const db = require('./db-sqlite');
+const { verifyPassword, generateToken } = require('./utils/auth');
 
 // 文件上传配置
 const storage = multer.memoryStorage();
@@ -15,7 +16,13 @@ const app = express();
 const PORT = process.argv[2] || process.env.PORT || 3000;
 
 // 中间件
-app.use(cors());
+const corsOptions = {
+  origin: process.env.CORS_ORIGIN ? process.env.CORS_ORIGIN.split(',') : ['http://localhost:5173', 'http://localhost:3001'],
+  credentials: true,
+  methods: ['GET', 'POST', 'PUT', 'DELETE', 'PATCH', 'OPTIONS'],
+  allowedHeaders: ['Content-Type', 'Authorization']
+};
+app.use(cors(corsOptions));
 app.use(express.json());
 app.use(express.urlencoded({ extended: true }));
 
@@ -61,17 +68,23 @@ app.post('/api/auth/login', [
   try {
     const { username, password } = req.body;
     const result = await db.query(
-      'SELECT id, username, role, name FROM users WHERE username = ? AND password = ?',
-      [username, password]
+      'SELECT id, username, role, name, password_hash FROM users WHERE username = ?',
+      [username]
     );
     
     if (result.rows.length === 0) {
       return res.status(401).json({ success: false, message: '用户名或密码错误' });
     }
     
-    res.json({ success: true, data: result.rows[0] });
+    const user = result.rows[0];
+    if (!user.password_hash || !verifyPassword(password, user.password_hash)) {
+      return res.status(401).json({ success: false, message: '用户名或密码错误' });
+    }
+    
+    const token = generateToken({ id: user.id, username: user.username, role: user.role });
+    res.json({ success: true, data: { id: user.id, username: user.username, role: user.role, name: user.name, token } });
   } catch (error) {
-    res.status(500).json({ success: false, message: error.message });
+    res.status(500).json({ success: false, message: '登录失败' });
   }
 });
 
@@ -81,28 +94,26 @@ app.post('/api/users/login', [
   body('password').notEmpty()
 ], validate, async (req, res) => {
   try {
-    console.log('收到登录请求:', req.body);
     const { username, password } = req.body;
     
     const result = await db.query(
-      'SELECT id, username, role, name FROM users WHERE username = ? AND password = ?',
-      [username, password]
+      'SELECT id, username, role, name, password_hash FROM users WHERE username = ?',
+      [username]
     );
     
-    console.log('查询结果:', result.rows);
-    
     if (result.rows.length === 0) {
-      console.log('登录失败: 用户不存在或密码错误');
       return res.status(401).json({ user: null, token: null, message: '用户名或密码错误' });
     }
     
-    // 返回前端期望的格式
-    const responseData = { user: result.rows[0], token: 'dummy-token-' + Date.now() };
-    console.log('登录成功，返回数据:', responseData);
-    res.json(responseData);
+    const user = result.rows[0];
+    if (!user.password_hash || !verifyPassword(password, user.password_hash)) {
+      return res.status(401).json({ user: null, token: null, message: '用户名或密码错误' });
+    }
+    
+    const token = generateToken({ id: user.id, username: user.username, role: user.role });
+    res.json({ user: { id: user.id, username: user.username, role: user.role, name: user.name }, token });
   } catch (error) {
-    console.error('登录错误:', error);
-    res.status(500).json({ user: null, token: null, message: error.message });
+    res.status(500).json({ user: null, token: null, message: '登录失败' });
   }
 });
 
diff --git a/backend/app-simple.js b/backend/app-simple.js
index dfb353d..9b2c8b6 100644
--- a/backend/app-simple.js
+++ b/backend/app-simple.js
@@ -9,7 +9,13 @@ const app = express();
 const PORT = process.env.PORT || 3002;
 
 // 中间件
-app.use(cors());
+const corsOptions = {
+  origin: process.env.CORS_ORIGIN ? process.env.CORS_ORIGIN.split(',') : ['http://localhost:5173', 'http://localhost:3001'],
+  credentials: true,
+  methods: ['GET', 'POST', 'PUT', 'DELETE', 'PATCH', 'OPTIONS'],
+  allowedHeaders: ['Content-Type', 'Authorization']
+};
+app.use(cors(corsOptions));
 app.use(express.json());
 app.use(express.urlencoded({ extended: true }));
 
diff --git a/backend/app.js b/backend/app.js
index 6d64c30..8020cc5 100644
--- a/backend/app.js
+++ b/backend/app.js
@@ -9,7 +9,13 @@ const app = express();
 const PORT = process.env.PORT || 3002;
 
 // 中间件
-app.use(cors());
+const corsOptions = {
+  origin: process.env.CORS_ORIGIN ? process.env.CORS_ORIGIN.split(',') : ['http://localhost:5173', 'http://localhost:3001'],
+  credentials: true,
+  methods: ['GET', 'POST', 'PUT', 'DELETE', 'PATCH', 'OPTIONS'],
+  allowedHeaders: ['Content-Type', 'Authorization']
+};
+app.use(cors(corsOptions));
 app.use(express.json());
 app.use(express.urlencoded({ extended: true }));
 
diff --git a/backend/app_fixed.js b/backend/app_fixed.js
index 47c33b9..050bdd3 100644
--- a/backend/app_fixed.js
+++ b/backend/app_fixed.js
@@ -9,7 +9,13 @@ const app = express();
 const PORT = process.env.PORT || 3002;
 
 // 中间件
-app.use(cors());
+const corsOptions = {
+  origin: process.env.CORS_ORIGIN ? process.env.CORS_ORIGIN.split(',') : ['http://localhost:5173', 'http://localhost:3001'],
+  credentials: true,
+  methods: ['GET', 'POST', 'PUT', 'DELETE', 'PATCH', 'OPTIONS'],
+  allowedHeaders: ['Content-Type', 'Authorization']
+};
+app.use(cors(corsOptions));
 app.use(express.json());
 app.use(express.urlencoded({ extended: true }));
 
diff --git a/backend/db.js b/backend/db.js
index e908e8b..6d851f2 100644
--- a/backend/db.js
+++ b/backend/db.js
@@ -1,11 +1,12 @@
 const { Pool } = require('pg');
+require('dotenv').config();
 
 const pool = new Pool({
-  host: 'localhost',
-  port: 5432,
-  database: 'company_finance',
-  user: 'postgres',
-  password: 'X123c321@',
+  host: process.env.DB_HOST || 'localhost',
+  port: parseInt(process.env.DB_PORT || '5432'),
+  database: process.env.DB_NAME || 'company_finance',
+  user: process.env.DB_USER || 'postgres',
+  password: process.env.DB_PASSWORD,
   max: 20,
   idleTimeoutMillis: 30000,
   connectionTimeoutMillis: 2000,
diff --git a/backend/ecosystem.config.js b/backend/ecosystem.config.js
index 601bf6c..0d8bfa3 100644
--- a/backend/ecosystem.config.js
+++ b/backend/ecosystem.config.js
@@ -17,7 +17,7 @@ module.exports = {
       DB_PORT: 5432,
       DB_NAME: 'company_finance_db',
       DB_USER: 'finance_user',
-      DB_PASSWORD: 'FinanceDB2026!'
+      DB_PASSWORD: process.env.DB_PASSWORD || ''
     }
   }]
 };
\ No newline at end of file
diff --git a/backend/final-backend.js b/backend/final-backend.js
index 5a5e370..ebd33b9 100644
--- a/backend/final-backend.js
+++ b/backend/final-backend.js
@@ -29,7 +29,13 @@ const app = express();
 const PORT = process.env.PORT || 3002;
 
 // 中间件
-app.use(cors());
+const corsOptions = {
+  origin: process.env.CORS_ORIGIN ? process.env.CORS_ORIGIN.split(',') : ['http://localhost:5173', 'http://localhost:3001'],
+  credentials: true,
+  methods: ['GET', 'POST', 'PUT', 'DELETE', 'PATCH', 'OPTIONS'],
+  allowedHeaders: ['Content-Type', 'Authorization']
+};
+app.use(cors(corsOptions));
 app.use(express.json());
 app.use(express.urlencoded({ extended: true }));
 
@@ -38,21 +44,21 @@ app.use(express.static(path.join(__dirname, '../frontend/dist')));
 
 // 用户相关 API
 // 获取用户列表
-
-// ==================== 认证路由 ====================
-const authRoutes = require('./routes/auth');
-app.use('/api/auth', authRoutes);
-
-
-// ==================== 用户路由 ====================
-const usersRoutes = require('./routes/users');
-app.use('/api/users', usersRoutes);
-
-
-// ==================== 商品路由 ====================
-const productsRoutes = require('./routes/products');
-app.use('/api/products', productsRoutes);
-
+
+// ==================== 认证路由 ====================
+const authRoutes = require('./routes/auth');
+app.use('/api/auth', authRoutes);
+
+
+// ==================== 用户路由 ====================
+const usersRoutes = require('./routes/users');
+app.use('/api/users', usersRoutes);
+
+
+// ==================== 商品路由 ====================
+const productsRoutes = require('./routes/products');
+app.use('/api/products', productsRoutes);
+
 
 // 创建供应商收款信息表
 async function createSupplierPaymentInfosTable() {
diff --git a/backend/middleware/auth.js b/backend/middleware/auth.js
index fa34b40..85db0f4 100644
--- a/backend/middleware/auth.js
+++ b/backend/middleware/auth.js
@@ -1,7 +1,7 @@
 const jwt = require('jsonwebtoken');
 const { hashPassword, verifyPassword, verifyToken } = require('../utils/auth');
 
-const JWT_SECRET = process.env.JWT_SECRET || 'your-jwt-secret-change-in-production';
+const JWT_SECRET = process.env.JWT_SECRET;
 
 const generateToken = (user) => {
   const payload = {
diff --git a/backend/production-server.js b/backend/production-server.js
index a8c7a33..a279eb7 100644
--- a/backend/production-server.js
+++ b/backend/production-server.js
@@ -10,7 +10,13 @@ const app = express();
 const PORT = process.env.PORT || 5000;
 
 // 中间件
-app.use(cors());
+const corsOptions = {
+  origin: process.env.CORS_ORIGIN ? process.env.CORS_ORIGIN.split(',') : ['http://localhost:5173', 'http://localhost:3001'],
+  credentials: true,
+  methods: ['GET', 'POST', 'PUT', 'DELETE', 'PATCH', 'OPTIONS'],
+  allowedHeaders: ['Content-Type', 'Authorization']
+};
+app.use(cors(corsOptions));
 app.use(express.json());
 app.use(express.urlencoded({ extended: true }));
 
diff --git a/backend/server-complete.js b/backend/server-complete.js
index e6acb11..7cbebe9 100644
--- a/backend/server-complete.js
+++ b/backend/server-complete.js
@@ -9,7 +9,13 @@ const app = express();
 const PORT = process.env.PORT || 3002;
 
 // 中间件
-app.use(cors());
+const corsOptions = {
+  origin: process.env.CORS_ORIGIN ? process.env.CORS_ORIGIN.split(',') : ['http://localhost:5173', 'http://localhost:3001'],
+  credentials: true,
+  methods: ['GET', 'POST', 'PUT', 'DELETE', 'PATCH', 'OPTIONS'],
+  allowedHeaders: ['Content-Type', 'Authorization']
+};
+app.use(cors(corsOptions));
 app.use(express.json());
 app.use(express.urlencoded({ extended: true }));
 
diff --git a/backend/utils/auth.js b/backend/utils/auth.js
index 6cd04ac..5618d84 100644
--- a/backend/utils/auth.js
+++ b/backend/utils/auth.js
@@ -2,10 +2,14 @@
 const bcrypt = require('bcryptjs');
 const jwt = require('jsonwebtoken');
 
-// JWT 密钥（生产环境应从环境变量读取）
-const JWT_SECRET = process.env.JWT_SECRET || 'your-jwt-secret-change-in-production';
+// JWT 密钥 - 必须通过环境变量设置，不提供默认值
+const JWT_SECRET = process.env.JWT_SECRET;
 const JWT_EXPIRES_IN = process.env.JWT_EXPIRES_IN || '24h';
 
+if (!JWT_SECRET) {
+  console.error('⚠️ 警告：未设置 JWT_SECRET 环境变量，请在 .env 文件中配置');
+}
+
 /**
  * 密码哈希
  * @param {string} password - 明文密码
diff --git a/codingplan-config.json b/codingplan-config.json
index 6ce54f4..ef69d28 100644
--- a/codingplan-config.json
+++ b/codingplan-config.json
@@ -3,7 +3,7 @@
     {
       "id": "codingplan",
       "name": "腾讯云CodingPlan",
-      "apiKey": "sk-sp-xGrYANrlwJfsQ8hAoyR2eUlHntiXlpuPZkFPeddakTXEUwDe",
+      "apiKey": "",
       "enabled": true,
       "models": [
         {