diff --git a/app/main/api/internal/service/wechatpayService.go b/app/main/api/internal/service/wechatpayService.go
index 237e6d4..ffda953 100644
--- a/app/main/api/internal/service/wechatpayService.go
+++ b/app/main/api/internal/service/wechatpayService.go
@@ -2,6 +2,7 @@ package service
 
 import (
 	"context"
+	"errors"
 	"fmt"
 	"net/http"
 	"strconv"
@@ -25,6 +26,14 @@ import (
 	"github.com/zeromicro/go-zero/core/logx"
 )
 
+// wxpayAPIHTTPStatus 安全读取微信支付 API 的 HTTP 状态码；本地签名/随机串失败时 result 可能为 nil。
+func wxpayAPIHTTPStatus(result *core.APIResult) int {
+	if result == nil || result.Response == nil {
+		return 0
+	}
+	return result.Response.StatusCode
+}
+
 const (
 	TradeStateSuccess    = "SUCCESS"    // 支付成功
 	TradeStateRefund     = "REFUND"     // 转入退款
@@ -175,7 +184,7 @@ func (w *WechatPayService) CreateWechatAppOrder(ctx context.Context, amount floa
 	resp, result, err := svc.Prepay(ctx, payRequest)
 	logx.Infof("微信app支付订单：resp: %+v, result: %+v, err: %+v", resp, result, err)
 	if err != nil {
-		return "", fmt.Errorf("微信支付订单创建失败: %v, 状态码: %d", err, result.Response.StatusCode)
+		return "", fmt.Errorf("微信支付订单创建失败: %v, 状态码: %d", err, wxpayAPIHTTPStatus(result))
 	}
 
 	// 返回预支付交易会话标识
@@ -200,14 +209,23 @@ func jsapiRequestPaymentToMap(resp *jsapi.PrepayWithRequestPaymentResponse) (map
 	if resp.Package != nil {
 		m["package"] = *resp.Package
 	}
-	if resp.SignType != nil {
+	if resp.SignType != nil && *resp.SignType != "" {
 		m["signType"] = *resp.SignType
+	} else {
+		m["signType"] = "RSA"
 	}
 	if resp.PaySign != nil {
 		m["paySign"] = *resp.PaySign
 	}
-	if len(m) != 6 {
-		return nil, fmt.Errorf("微信 JSAPI 调起参数不完整")
+	var missing []string
+	for _, key := range []string{"appId", "timeStamp", "nonceStr", "package", "paySign"} {
+		if m[key] == "" {
+			missing = append(missing, key)
+		}
+	}
+	if len(missing) > 0 {
+		logx.Errorf("[WechatPay] JSAPI 调起参数缺项: missing=%v resp=%s", missing, resp.String())
+		return nil, fmt.Errorf("微信 JSAPI 调起参数不完整: 缺少或为空 %v", missing)
 	}
 	return m, nil
 }
@@ -237,7 +255,7 @@ func (w *WechatPayService) CreateWechatMiniProgramOrder(ctx context.Context, amo
 	resp, result, err := svc.PrepayWithRequestPayment(ctx, payRequest)
 	logx.Infof("微信小程序支付订单：resp: %+v, result: %+v, err: %+v", resp, result, err)
 	if err != nil {
-		return "", fmt.Errorf("微信支付订单创建失败: %v, 状态码: %d", err, result.Response.StatusCode)
+		return "", fmt.Errorf("微信支付订单创建失败: %v, 状态码: %d", err, wxpayAPIHTTPStatus(result))
 	}
 	return jsapiRequestPaymentToMap(resp)
 }
@@ -270,7 +288,7 @@ func (w *WechatPayService) CreateWechatH5Order(ctx context.Context, amount float
 	logx.Infof("微信h5支付订单：resp: %+v, result: %+v, err: %+v", resp, result, err)
 	if err != nil {
 		logx.Infof("微信h5支付订单：resp: %+v, result: %+v, err: %+v", resp, result, err)
-		return "", fmt.Errorf("微信支付订单创建失败: %v, 状态码: %d", err, result.Response.StatusCode)
+		return "", fmt.Errorf("微信支付订单创建失败: %v, 状态码: %d", err, wxpayAPIHTTPStatus(result))
 	}
 	return jsapiRequestPaymentToMap(resp)
 }
@@ -316,31 +334,28 @@ func (w *WechatPayService) CreateWechatOrder(ctx context.Context, amount float64
 		if getUidErr != nil {
 			return "", getUidErr
 		}
-		// 微信内 H5：优先 wxh5_openid（与公众号/网页 AppID 一致）；若无则尝试 wxmini_openid（走小程序 AppID 下单）
+		// 微信内置浏览器 JSAPI 必须使用与商户公众号一致的 openid（snsapi_base / snsapi_userinfo 授权后写入 wxh5_openid）。
+		// 不可使用小程序 openid 兜底：AppID 与 openid 主体不一致会导致下单失败或调起异常。
 		h5Auth, h5Err := w.userAuthModel.FindOneByUserIdAuthType(ctx, userID, model.UserAuthTypeWxh5OpenID)
-		if h5Err == nil {
-			logx.Infof("微信h5支付订单：userAuthModel(wxh5): %+v", h5Auth)
-			prepayData, err = w.CreateWechatH5Order(ctx, amount, description, outTradeNo, h5Auth.AuthKey)
-			if err != nil {
-				return "", err
+		if h5Err != nil {
+			if errors.Is(h5Err, model.ErrNotFound) {
+				logx.WithContext(ctx).Infof(
+					"[WechatPay] wxh5 缺少 user_auth(wxh5_openid) user_id=%d out_trade_no=%s，需先走公众号网页授权(建议 scope=snsapi_base)",
+					userID, outTradeNo,
+				)
+				return "", fmt.Errorf("微信内支付需先完成公众号网页授权以获取 openid（建议使用 snsapi_base 静默授权）")
 			}
-		} else if h5Err == model.ErrNotFound {
-			miniAuth, miniErr := w.userAuthModel.FindOneByUserIdAuthType(ctx, userID, model.UserAuthTypeWxMiniOpenID)
-			if miniErr != nil {
-				return "", miniErr
-			}
-			logx.WithContext(ctx).Infof(
-				"[WechatPay] wxh5 无 wxh5_openid，使用 wxmini_openid 下单 out_trade_no=%s user_id=%d",
-				outTradeNo, userID,
-			)
-			logx.Infof("微信h5支付订单：userAuthModel(wxmini fallback): %+v", miniAuth)
-			prepayData, err = w.CreateWechatMiniProgramOrder(ctx, amount, description, outTradeNo, miniAuth.AuthKey)
-			if err != nil {
-				return "", err
-			}
-		} else {
 			return "", h5Err
 		}
+		if strings.TrimSpace(h5Auth.AuthKey) == "" {
+			logx.WithContext(ctx).Errorf("[WechatPay] wxh5_openid 记录存在但 auth_key 为空 user_id=%d", userID)
+			return "", fmt.Errorf("微信内支付 openid 未就绪，请重新完成公众号网页授权")
+		}
+		logx.Infof("微信h5支付订单：userAuthModel(wxh5): %+v", h5Auth)
+		prepayData, err = w.CreateWechatH5Order(ctx, amount, description, outTradeNo, strings.TrimSpace(h5Auth.AuthKey))
+		if err != nil {
+			return "", err
+		}
 	case model.PlatformApp:
 		// 如果是 APP 平台，调用 APP 支付订单创建
 		prepayData, err = w.CreateWechatAppOrder(ctx, amount, description, outTradeNo)
@@ -355,7 +370,10 @@ func (w *WechatPayService) CreateWechatOrder(ctx context.Context, amount float64
 
 	if prepayData == nil {
 		logx.WithContext(ctx).Errorf("[WechatPay] CreateWechatOrder 返回 prepayData 为 nil platform=%q", platform)
-	} else if m, isMap := prepayData.(map[string]string); isMap {
+		return nil, fmt.Errorf("微信支付返回数据为空 platform=%s", platform)
+	}
+
+	if m, isMap := prepayData.(map[string]string); isMap {
 		keys := make([]string, 0, len(m))
 		for k := range m {
 			keys = append(keys, k)
@@ -400,7 +418,7 @@ func (w *WechatPayService) QueryOrderStatus(ctx context.Context, transactionID s
 		Mchid:         core.String(w.config.Wxpay.MchID),
 	})
 	if err != nil {
-		return nil, fmt.Errorf("订单查询失败: %v, 状态码: %d", err, result.Response.StatusCode)
+		return nil, fmt.Errorf("订单查询失败: %v, 状态码: %d", err, wxpayAPIHTTPStatus(result))
 	}
 	return resp, nil