diff --git a/server.js b/server.js
index 79bae9d..4abe0f5 100644
--- a/server.js
+++ b/server.js
@@ -164,16 +164,23 @@ app.post('/api/payment/create', async (req, res) => {
       }
 
       // 创建 UPay 支付订单
+      const baseUrl = `${req.protocol}://${req.get('host')}`;
+      const redirectUrl = `${baseUrl}/success.html?order_id=${order_id}`;
+      
       const paymentData = {
         appId: UPAY_APP_ID,
         merchantOrderNo: order_id,
         chainType: '1', // USDT TRC20
         fiatAmount: order.total_amount.toFixed(2),
         fiatCurrency: 'USD',
-        notifyUrl: `${req.protocol}://${req.get('host')}/api/payment/callback`,
-        redirectUrl: `${req.protocol}://${req.get('host')}/success.html?order_id=${order_id}`
+        notifyUrl: `${baseUrl}/api/payment/callback`,
+        redirectUrl: encodeURIComponent(redirectUrl)
       };
 
+      console.log('Payment data before signature:', paymentData);
+      console.log('Original redirectUrl:', redirectUrl);
+      console.log('Encoded redirectUrl:', paymentData.redirectUrl);
+
       // 生成签名
       paymentData.signature = generateUpaySignature(paymentData, UPAY_APP_SECRET);