diff --git a/src/main/java/com/aida/buyer/module/account/controller/BuyerAccountController.java b/src/main/java/com/aida/buyer/module/account/controller/BuyerAccountController.java
index 7ecf54e..176c07e 100644
--- a/src/main/java/com/aida/buyer/module/account/controller/BuyerAccountController.java
+++ b/src/main/java/com/aida/buyer/module/account/controller/BuyerAccountController.java
@@ -26,7 +26,7 @@ public class BuyerAccountController {
     }
 
     @PostMapping("/register")
-    @Operation(summary = "注册")
+    @Operation(summary = "获取验证码后注册")
     public Boolean register(@Valid @RequestBody RegisterDTO dto) {
         return buyerAccountService.register(dto);
     }
diff --git a/src/main/java/com/aida/buyer/module/feign/config/FeignConfig.java b/src/main/java/com/aida/buyer/module/feign/config/FeignConfig.java
index 0f79869..2ea01ad 100644
--- a/src/main/java/com/aida/buyer/module/feign/config/FeignConfig.java
+++ b/src/main/java/com/aida/buyer/module/feign/config/FeignConfig.java
@@ -1,12 +1,14 @@
 package com.aida.buyer.module.feign.config;
 
+import com.aida.buyer.module.feign.decoder.BusinessErrorFeignDecoder;
 import com.aida.buyer.module.feign.interceptor.InternalCallInterceptor;
+import com.fasterxml.jackson.databind.ObjectMapper;
 import feign.RequestInterceptor;
 import org.springframework.context.annotation.Bean;
 import org.springframework.context.annotation.Configuration;
 
 /**
- * Feign 全局配置：注册所有 Feign 拦截器。
+ * Feign 全局配置：注册所有 Feign 拦截器和 Decoder。
  */
 @Configuration
 public class FeignConfig {
@@ -15,4 +17,9 @@ public class FeignConfig {
     public RequestInterceptor internalCallInterceptor() {
         return new InternalCallInterceptor();
     }
+
+    @Bean
+    public BusinessErrorFeignDecoder businessErrorFeignDecoder(ObjectMapper objectMapper) {
+        return new BusinessErrorFeignDecoder(objectMapper);
+    }
 }
diff --git a/src/main/java/com/aida/buyer/module/feign/decoder/BusinessErrorFeignDecoder.java b/src/main/java/com/aida/buyer/module/feign/decoder/BusinessErrorFeignDecoder.java
new file mode 100644
index 0000000..38ab7f5
--- /dev/null
+++ b/src/main/java/com/aida/buyer/module/feign/decoder/BusinessErrorFeignDecoder.java
@@ -0,0 +1,92 @@
+package com.aida.buyer.module.feign.decoder;
+
+import com.aida.buyer.common.exception.BusinessException;
+import com.fasterxml.jackson.databind.ObjectMapper;
+import feign.FeignException;
+import feign.Request;
+import feign.Response;
+import feign.codec.DecodeException;
+import feign.codec.Decoder;
+import lombok.RequiredArgsConstructor;
+
+import java.io.BufferedReader;
+import java.io.IOException;
+import java.io.InputStreamReader;
+import java.lang.reflect.ParameterizedType;
+import java.lang.reflect.Type;
+import java.nio.charset.StandardCharsets;
+import java.util.Collection;
+import java.util.Map;
+
+/**
+ * Feign 全局 Decoder。
+ *
+ * <p>背景：seller 端使用 {@code @RestControllerAdvice} 将 {@code BusinessException}
+ * 转为 HTTP 200 + {@code Response.fail(code, msg)} 返回。
+ * 默认 Decoder 只看 HTTP 状态码，2xx 一律视为成功，导致 buyer 端无法感知远程业务错误。</p>
+ *
+ * <p>本 Decoder 在解析响应体时：
+ * <ul>
+ *   <li>若 HTTP 状态码为 2xx，先将 body 读取为字符串并解析为标准 {@code Response}；</li>
+ *   <li>若 {@code errCode != 0}，抛出 {@link BusinessException}，错误信息为远程返回的 errMsg；</li>
+ *   <li>否则使用 {@link ObjectMapper} 将 body 反序列化为目标类型 {@code T}。</li>
+ * </ul>
+ * </p>
+ *
+ * <p>HTTP 非 2xx 状态码（如 500、服务不可用）由 Feign 默认 ErrorDecoder 抛出
+ * {@link FeignException}，不在本 Decoder 处理范围内。</p>
+ */
+@RequiredArgsConstructor
+public class BusinessErrorFeignDecoder implements Decoder {
+
+    private final ObjectMapper objectMapper;
+
+    @Override
+    @SuppressWarnings("unchecked")
+    public Object decode(Response response, Type type) throws IOException, DecodeException, FeignException {
+        if (!is2xx(response.status())) {
+            throw FeignException.errorStatus(requestKey(response), response);
+        }
+
+        String body = readBody(response);
+        if (body == null || body.isBlank()) {
+            return null;
+        }
+
+        // 先按标准 Response 格式解析，校验 errCode
+        com.aida.buyer.common.result.Response<?> genericResp = objectMapper.readValue(body, com.aida.buyer.common.result.Response.class);
+        if (genericResp.getErrCode() != 0) {
+            throw new BusinessException(
+                    genericResp.getErrCode(),
+                    genericResp.getErrMsg() != null ? genericResp.getErrMsg() : "远程服务业务错误"
+            );
+        }
+
+        // errCode == 0，ObjectMapper 反序列化为目标类型
+        return objectMapper.readValue(body, objectMapper.getTypeFactory().constructType(type));
+    }
+
+    private boolean is2xx(int status) {
+        return status >= 200 && status < 300;
+    }
+
+    private String readBody(Response response) throws IOException {
+        if (response.body() == null) {
+            return null;
+        }
+        try (BufferedReader reader = new BufferedReader(
+                new InputStreamReader(response.body().asInputStream(), StandardCharsets.UTF_8))) {
+            StringBuilder sb = new StringBuilder();
+            String line;
+            while ((line = reader.readLine()) != null) {
+                sb.append(line);
+            }
+            return sb.toString();
+        }
+    }
+
+    private String requestKey(Response response) {
+        Request request = response.request();
+        return request.method() + " " + request.url();
+    }
+}
diff --git a/src/main/java/com/aida/buyer/module/order/service/impl/BuyerOrderServiceImpl.java b/src/main/java/com/aida/buyer/module/order/service/impl/BuyerOrderServiceImpl.java
index ad8d946..9462ddf 100644
--- a/src/main/java/com/aida/buyer/module/order/service/impl/BuyerOrderServiceImpl.java
+++ b/src/main/java/com/aida/buyer/module/order/service/impl/BuyerOrderServiceImpl.java
@@ -1,7 +1,6 @@
 package com.aida.buyer.module.order.service.impl;
 
 import com.aida.buyer.common.context.UserContext;
-import com.aida.buyer.common.exception.BusinessException;
 import com.aida.buyer.common.result.PageResponse;
 import com.aida.buyer.common.result.Response;
 import com.aida.buyer.module.account.entity.BuyerAccount;
@@ -46,10 +45,6 @@ public class BuyerOrderServiceImpl implements IBuyerOrderService {
         dto.setBuyerUsername(account.getUsername());
 
         Response<CreateOrderResultVO> orderResp = orderFeignClient.createOrder(dto);
-        if (orderResp == null || orderResp.getErrCode() != 0) {
-            throw new BusinessException("创建订单失败");
-        }
-
         CreateOrderResultVO result = orderResp.getData();
         // TODO:调用支付模块，传入buyerId，result.getOrderIds()，result.getTotalAmount()
 
diff --git a/src/main/resources/bootstrap.yml b/src/main/resources/bootstrap.yml
index cc6b401..214a200 100644
--- a/src/main/resources/bootstrap.yml
+++ b/src/main/resources/bootstrap.yml
@@ -4,7 +4,7 @@
 # ============================================================
 
 nacos:
-  namespace: ltx
+  namespace: dev
   host: 18.167.251.121:28848
   username: nacos
   password: Aidlab123123!