diff --git a/src/main/java/com/iflytop/gd/system/common/result/ResultCode.java b/src/main/java/com/iflytop/gd/system/common/result/ResultCode.java
index 0bc77a5..4c74855 100644
--- a/src/main/java/com/iflytop/gd/system/common/result/ResultCode.java
+++ b/src/main/java/com/iflytop/gd/system/common/result/ResultCode.java
@@ -11,38 +11,39 @@ import java.io.Serializable;
 @Getter
 @AllArgsConstructor
 public enum ResultCode implements IResultCode, Serializable {
-    // 成功
-    SUCCESS("00000", "成功"),
+    //================================ 通用 =================================
+    SUCCESS("0", "成功"),
+    FAILED("-1", "未知错误"),
 
-    // 通用失败
-    FAILED("99999", "失败"),
+    //============================ 1xxx：请求 & 参数 ============================
+    INVALID_PARAMETER("1000", "参数无效或缺失"),
+    PARAMETER_TYPE_MISMATCH("1001", "参数类型不匹配"),
+    PARAMETER_OUT_OF_RANGE("1002", "参数超出允许范围"),
 
-    // 参数校验类（4xxxx）
-    VALIDATION_ERROR("40000", "参数校验失败"),
+    //============================ 2xxx：认证 & 授权 ============================
+    UNAUTHORIZED("2000", "未认证或登录失效"),
+    FORBIDDEN("2001", "无访问权限"),
+    TOKEN_EXPIRED("2002", "Token 已过期"),
+    TOKEN_INVALID("2003", "Token 无效"),
 
-    // 鉴权/认证类（4xxxx）
-    UNAUTHORIZED("40100", "未认证或Token失效"),
-    FORBIDDEN("40300", "无访问权限"),
+    //============================ 3xxx：资源访问 ============================
+    NOT_FOUND("3000", "资源不存在"),
+    METHOD_NOT_ALLOWED("3001", "不支持的请求方法"),
 
-    // 资源访问类（4xxxx）
-    NOT_FOUND("40400", "资源不存在"),
-    METHOD_NOT_ALLOWED("40500", "不支持的请求方法"),
+    //============================ 4xxx：业务错误 ============================
+    USER_NOT_FOUND("4000", "用户不存在"),
+    USER_ALREADY_EXISTS("4001", "用户已存在"),
+    INVALID_CREDENTIALS("4002", "用户名或密码错误"),
+    OPERATION_NOT_ALLOWED("4003", "业务操作不允许"),
 
-    // 系统错误（5xxxx）
-    SYSTEM_ERROR("50000", "系统内部错误"),
+    //============================ 5xxx：系统 & 第三方 ============================
+    SYSTEM_ERROR("5000", "系统内部错误"),
+    SERVICE_UNAVAILABLE("5001", "服务暂不可用"),
+    EXTERNAL_API_ERROR("5002", "第三方服务调用失败");
 
-    // ----------------- 业务错误（1xxxx）示例 -----------------
-    USER_NOT_FOUND("10001", "用户不存在"),
-    USERNAME_ALREADY_EXISTS("10002", "用户名已存在"),
-    PASSWORD_INCORRECT("10003", "用户名或密码错误");
-
-    /**
-     * 状态码
-     */
+    /** 状态码 */
     private final String code;
-    /**
-     * 提示信息
-     */
+    /** 提示信息 */
     private final String msg;
 
     @Override
@@ -64,8 +65,7 @@ public enum ResultCode implements IResultCode, Serializable {
                 return item;
             }
         }
-        // 找不到则返回通用失败或系统错误
-        return SYSTEM_ERROR;
+        return FAILED;
     }
 
     @Override