diff --git a/backend/app/core/database.py b/backend/app/core/database.py
index 789c23c..ebfb15e 100644
--- a/backend/app/core/database.py
+++ b/backend/app/core/database.py
@@ -5,8 +5,8 @@ from sqlalchemy.orm import sessionmaker
 
 # 支持 MySQL, PostgreSQL
 DATABASE_URL = os.getenv(
-    "DATABASE_URL",
-    "postgresql://postgres:postgres@localhost:5432/zodiac"
+    DATABASE_URL,
+    postgresql://postgres:postgres@localhost:5432/zodiac
 )
 
 # 数据库引擎配置
@@ -15,6 +15,8 @@ engine = create_engine(
     pool_pre_ping=True,
     pool_size=10,
     max_overflow=20,
+    pool_recycle=3600,  # 1小时回收连接
+    pool_timeout=30,   # 获取连接超时30秒
     echo=False
 )
 
diff --git a/backend/app/services/sms.py b/backend/app/services/sms.py
index e8a0a7b..96b1f37 100644
--- a/backend/app/services/sms.py
+++ b/backend/app/services/sms.py
@@ -5,34 +5,32 @@ import string
 import time
 from datetime import datetime, timedelta
 from typing import Optional
+from dotenv import load_dotenv
+
+# 加载环境变量
+load_dotenv()
 
 # 阿里云短信配置
 SMS_CONFIG = {
-    "access_key_id": os.getenv("SMS_ACCESS_KEY_ID", "LTAI5t6HUnpFBLEK9194kPVG"),
-    "access_key_secret": os.getenv("SMS_ACCESS_KEY_SECRET", "LEr4Q8yRxb8D5b24cKfCwlt4MMoke1"),
-    "sign_name": "阿里云",
-    "template_code": "100001",
+    "access_key_id": os.getenv("SMS_ACCESS_KEY_ID", "LTAI5tQAx5niD7JQVqGE5acE"),
+    "access_key_secret": os.getenv("SMS_ACCESS_KEY_SECRET", "QsQFAEKBkaNynIoKyvdIi3BUyWVZu1"),
+    "sign_name": os.getenv("SMS_SIGN_NAME", "苏州算力"),
+    "template_code": os.getenv("SMS_TEMPLATE_CODE", "SMS_501590956"),
 }
 
-# 验证码缓存（生产环境建议用Redis）
-# 格式: { phone: { code: "123456", expire: 1234567890 } }
+# 验证码缓存
 VERIFICATION_CODES = {}
 
-
 def generate_code(length: int = 6) -> str:
-    """生成6位数字验证码"""
     return ''.join(random.choices(string.digits, k=length))
 
-
 def send_verification_code(phone: str) -> dict:
-    """发送短信验证码"""
     from alibabacloud_dysmsapi20170525 import models
     from alibabacloud_dysmsapi20170525.client import Client
     from alibabacloud_tea_openapi import models as open_models
     
     try:
-        # 生成验证码
-        code = generate_code(6)
+        code = generate_code()
         
         # 配置客户端
         config = open_models.Config(
@@ -57,10 +55,9 @@ def send_verification_code(phone: str) -> dict:
         
         # 检查结果
         if response.body.code == "OK":
-            # 保存验证码
             VERIFICATION_CODES[phone] = {
                 "code": code,
-                "expire": int(time.time()) + 300  # 5分钟有效
+                "expire": int(time.time()) + 300
             }
             return {
                 "success": True,
@@ -72,35 +69,23 @@ def send_verification_code(phone: str) -> dict:
                 "success": False,
                 "message": f"发送失败: {response.body.message}"
             }
-            
     except Exception as e:
         return {
             "success": False,
             "message": f"发送失败: {str(e)}"
         }
 
-
 def verify_code(phone: str, code: str) -> bool:
-    """验证验证码"""
     if phone not in VERIFICATION_CODES:
         return False
     
-    stored = VERIFICATION_CODES[phone]
-    
-    # 检查是否过期
-    if int(time.time()) > stored["expire"]:
+    cached = VERIFICATION_CODES[phone]
+    if int(time.time()) > cached["expire"]:
         del VERIFICATION_CODES[phone]
         return False
     
-    # 验证码匹配
-    if stored["code"] == code:
-        # 验证成功，删除验证码
+    if cached["code"] == code:
         del VERIFICATION_CODES[phone]
         return True
     
     return False
-
-
-def check_code_exists(phone: str) -> bool:
-    """检查是否已发送过验证码"""
-    return phone in VERIFICATION_CODES