diff --git a/app/api/endpoints/order.py b/app/api/endpoints/order.py
index 42aca35..c06acf9 100644
--- a/app/api/endpoints/order.py
+++ b/app/api/endpoints/order.py
@@ -35,12 +35,26 @@ async def create_shipping_order(
     # 生成订单号
     orderid = generate_order_id()
     
-    # 计算优惠金额
+    # 计算订单价格
+    package_count = sum(
+        len(package.pickup_codes.split(',')) 
+        for package in order.price_request.packages 
+        if package.pickup_codes
+    )
+    
+    # 计算原始金额
+    original_amount = settings.ORDER_BASE_PRICE
+    if package_count > settings.ORDER_EXTRA_PACKAGE_THRESHOLD:
+        extra_packages = package_count - settings.ORDER_EXTRA_PACKAGE_THRESHOLD
+        original_amount += extra_packages * settings.ORDER_EXTRA_PACKAGE_PRICE
+    
+    # 计算优惠券折扣
     coupon_discount = 0
-    if order.coupon_id:
+    coupon_id = None
+    if order.price_request.coupon_id:
         # 查询用户优惠券
         user_coupon = db.query(UserCouponDB).filter(
-            UserCouponDB.id == order.coupon_id,
+            UserCouponDB.id == order.price_request.coupon_id,
             UserCouponDB.user_id == current_user.userid,
             UserCouponDB.status == CouponStatus.UNUSED,
             UserCouponDB.expire_time > datetime.now(timezone.utc)
@@ -50,27 +64,29 @@ async def create_shipping_order(
             return error_response(code=400, message="优惠券无效或已过期")
         
         coupon_discount = user_coupon.coupon_amount
+        coupon_id = user_coupon.id
         # 更新优惠券状态
         user_coupon.status = CouponStatus.USED
     
     # 计算最终金额
-    final_amount = max(0, order.original_amount - coupon_discount)
+    final_amount = max(0, original_amount - coupon_discount)
     
     # 创建订单
     db_order = ShippingOrderDB(
         orderid=orderid,
         userid=current_user.userid,
         addressid=order.addressid,
-        package_count=order.package_count,
-        original_amount=order.original_amount,
+        package_count=package_count,
+        original_amount=original_amount,
         coupon_discount_amount=coupon_discount,
-        coupon_id=order.coupon_id,
-        final_amount=final_amount
+        coupon_id=coupon_id,
+        final_amount=final_amount,
+        delivery_method=order.delivery_method
     )
     db.add(db_order)
     
     # 创建订单包裹
-    for package in order.packages:
+    for package in order.price_request.packages:
         db_package = ShippingOrderPackageDB(
             orderid=orderid,
             station_id=package.station_id,
@@ -147,7 +163,12 @@ async def calculate_order_price(
     current_user: UserDB = Depends(get_current_user)
 ):
     """计算订单价格"""
-    package_count = len(request.packages)
+    # 计算所有包裹中的取件码总数
+    package_count = sum(
+        len(package.pickup_codes.split(',')) 
+        for package in request.packages 
+        if package.pickup_codes
+    )
     
     # 计算原始金额
     original_amount = settings.ORDER_BASE_PRICE
diff --git a/app/models/order.py b/app/models/order.py
index 473d044..89e3a63 100644
--- a/app/models/order.py
+++ b/app/models/order.py
@@ -49,13 +49,18 @@ class OrderPackage(BaseModel):
     station_id: int
     pickup_codes: str = Field(..., max_length=100)
 
+# 先定义 OrderPriceCalculateRequest
+class OrderPriceCalculateRequest(BaseModel):
+    packages: List[OrderPackage]
+
+# 然后再定义 OrderCreate
 class OrderCreate(BaseModel):
     addressid: int
-    package_count: int = Field(..., gt=0)
-    original_amount: float = Field(..., ge=0)
-    coupon_id: Optional[int] = None
-    packages: List[OrderPackage]
-    delivery_method: DeliveryMethod = Field(default=DeliveryMethod.DELIVERY_TO_DOOR)
+    price_request: OrderPriceCalculateRequest
+    delivery_method: DeliveryMethod = Field(
+        default=DeliveryMethod.DELIVERY_TO_DOOR,
+        description="配送方式：放在门口或投递到家"
+    )
 
 class OrderInfo(BaseModel):
     orderid: str
@@ -99,9 +104,6 @@ def generate_order_id() -> str:
     timestamp = str(int(now.timestamp() * 1000))[-6:]
     return f"{date_str}{timestamp}" 
 
-class OrderPriceCalculateRequest(BaseModel):
-    packages: List[OrderPackage]
-
 class OrderPriceInfo(BaseModel):
     package_count: int
     original_amount: float