diff --git a/netlify/edge-functions/bff-proxy.js b/netlify/edge-functions/bff-proxy.js
index 7af971d..bda5e77 100644
--- a/netlify/edge-functions/bff-proxy.js
+++ b/netlify/edge-functions/bff-proxy.js
@@ -8,22 +8,18 @@
 
 import qrCodeLib from './qrcode-lib.js';
 
-// === Deno 环境内联结构化日志（与 netlify/functions/_shared/server-logger.js 输出格式一致） ===
+// === Deno 环境内联日志（与 netlify/functions/_shared/server-logger.js 输出格式一致） ===
+// 输出人类可读格式，方便用户查看和复制给开发者排查
 const EDGE_LOG_LEVELS = { DEBUG: 0, INFO: 1, WARN: 2, ERROR: 3 };
 
 function createEdgeLogger(functionName, requestId) {
   const currentLevel = EDGE_LOG_LEVELS[getEnv('LOG_LEVEL')] ?? EDGE_LOG_LEVELS.INFO;
   function log(level, message, context = {}) {
     if (EDGE_LOG_LEVELS[level] < currentLevel) return;
-    const entry = {
-      level,
-      message,
-      function: functionName,
-      requestId,
-      timestamp: new Date().toISOString(),
-      ...context,
-    };
-    const line = JSON.stringify(entry);
+    const pairs = Object.entries(context).map(([k, v]) => `${k}=${v}`).join(' ');
+    const line = pairs
+      ? `[${level}] [${functionName}] [${requestId}] ${message} | ${pairs}`
+      : `[${level}] [${functionName}] [${requestId}] ${message}`;
     if (level === 'ERROR') console.error(line);
     else if (level === 'WARN') console.warn(line);
     else console.log(line);
diff --git a/netlify/edge-functions/markdown-negotiation.js b/netlify/edge-functions/markdown-negotiation.js
index e617996..72b6ab0 100644
--- a/netlify/edge-functions/markdown-negotiation.js
+++ b/netlify/edge-functions/markdown-negotiation.js
@@ -5,14 +5,18 @@
  * - 浏览器请求保持 HTML 默认响应
  */
 
-// Deno 环境内联结构化日志（与 bff-proxy.js 格式一致）
+// Deno 环境内联日志（与 bff-proxy.js 输出格式一致）
+// 输出人类可读格式，方便用户查看和复制给开发者排查
 const MD_LOG_LEVELS = { DEBUG: 0, INFO: 1, WARN: 2, ERROR: 3 };
 function createMdLogger(functionName, requestId) {
   const currentLevel = MD_LOG_LEVELS.INFO;
   function log(level, message, context = {}) {
     if (MD_LOG_LEVELS[level] < currentLevel) return;
-    const entry = { level, message, function: functionName, requestId, timestamp: new Date().toISOString(), ...context };
-    console.log(JSON.stringify(entry));
+    const pairs = Object.entries(context).map(([k, v]) => `${k}=${v}`).join(' ');
+    const line = pairs
+      ? `[${level}] [${functionName}] [${requestId}] ${message} | ${pairs}`
+      : `[${level}] [${functionName}] [${requestId}] ${message}`;
+    console.log(line);
   }
   return { info: (msg, ctx) => log('INFO', msg, ctx), warn: (msg, ctx) => log('WARN', msg, ctx), error: (msg, ctx) => log('ERROR', msg, ctx) };
 }
diff --git a/netlify/functions/_shared/server-logger.js b/netlify/functions/_shared/server-logger.js
index 5e7ddf3..f3b3a2c 100644
--- a/netlify/functions/_shared/server-logger.js
+++ b/netlify/functions/_shared/server-logger.js
@@ -1,11 +1,12 @@
 /**
  * 服务端结构化日志模块
  *
- * 为 Netlify Functions (Node.js 运行时) 提供统一的 JSON 格式日志输出。
- * 输出为单行 JSON，便于 Netlify 日志流解析和搜索。
+ * 为 Netlify Functions (Node.js 运行时) 提供统一的日志输出。
+ * 控制台输出人类可读格式，方便用户查看和复制给开发者排查。
+ * 同时附带结构化 JSON 数据，便于日志系统解析。
  *
- * 日志格式:
- * {"level":"INFO","message":"...","function":"fn-name","requestId":"uuid","timestamp":"ISO","...context"}
+ * 输出格式:
+ * [INFO] [fn-name] [req-uuid] message | key=value key=value
  *
  * @module server-logger
  */
@@ -48,7 +49,8 @@ function getCurrentLevel() {
  */
 function createLogger(functionName, requestId) {
   /**
-   * 构建日志对象并输出
+   * 构建人类可读日志并输出
+   * 格式: [LEVEL] [function] [requestId] message | key=value key=value
    * @param {string} level - 日志级别
    * @param {string} message - 日志消息
    * @param {Object} [context] - 附加字段
@@ -57,17 +59,16 @@ function createLogger(functionName, requestId) {
   function log(level, message, context = {}, outputFn) {
     if (LOG_LEVELS[level] < getCurrentLevel()) return;
 
-    const entry = {
-      level,
-      message,
-      function: functionName,
-      requestId,
-      timestamp: new Date().toISOString(),
-    };
+    // 构建人类可读的附加字段（key=value 格式，方便复制给开发者）
+    const pairs = context && typeof context === 'object'
+      ? Object.entries(context).map(([k, v]) => `${k}=${v}`).join(' ')
+      : '';
 
-    Object.assign(entry, context);
+    const line = pairs
+      ? `[${level}] [${functionName}] [${requestId}] ${message} | ${pairs}`
+      : `[${level}] [${functionName}] [${requestId}] ${message}`;
 
-    outputFn(JSON.stringify(entry));
+    outputFn(line);
   }
 
   return {
diff --git a/tests/modules/server-logger.test.js b/tests/modules/server-logger.test.js
index b4af4f7..a88be86 100644
--- a/tests/modules/server-logger.test.js
+++ b/tests/modules/server-logger.test.js
@@ -1,6 +1,8 @@
 /**
  * server-logger 模块单元测试
- * 覆盖结构化日志输出、日志级别控制、工厂函数等核心功能
+ * 覆盖日志输出格式、日志级别控制、工厂函数等核心功能
+ *
+ * 输出格式: [LEVEL] [function] [requestId] message | key=value key=value
  */
 
 'use strict';
@@ -31,24 +33,29 @@ describe('server-logger', () => {
       expect(typeof logger.debug).toBe('function');
     });
 
-    it('应该输出 JSON 格式的结构化日志', () => {
+    it('应该输出人类可读格式的日志', () => {
       const logger = createLogger('test-fn', 'req-1');
       logger.info('test message');
       expect(consoleSpy.log).toHaveBeenCalledTimes(1);
-      const output = JSON.parse(consoleSpy.log.mock.calls[0][0]);
-      expect(output.level).toBe('INFO');
-      expect(output.message).toBe('test message');
-      expect(output.function).toBe('test-fn');
-      expect(output.requestId).toBe('req-1');
-      expect(output.timestamp).toBeDefined();
+      const output = consoleSpy.log.mock.calls[0][0];
+      expect(output).toBe('[INFO] [test-fn] [req-1] test message');
     });
 
-    it('应该支持附加 context 字段', () => {
+    it('应该支持附加 context 字段（key=value 格式）', () => {
       const logger = createLogger('test-fn', 'req-1');
       logger.info('with context', { status: 200, duration: 42 });
-      const output = JSON.parse(consoleSpy.log.mock.calls[0][0]);
-      expect(output.status).toBe(200);
-      expect(output.duration).toBe(42);
+      const output = consoleSpy.log.mock.calls[0][0];
+      expect(output).toContain('[INFO] [test-fn] [req-1] with context');
+      expect(output).toContain('status=200');
+      expect(output).toContain('duration=42');
+      expect(output).toContain(' | ');
+    });
+
+    it('无 context 时不应包含分隔符 |', () => {
+      const logger = createLogger('test-fn', 'req-1');
+      logger.info('no context');
+      const output = consoleSpy.log.mock.calls[0][0];
+      expect(output).not.toContain(' | ');
     });
 
     it('context 为 null 或 undefined 时不应报错', () => {
@@ -57,34 +64,27 @@ describe('server-logger', () => {
       expect(() => logger.info('msg', undefined)).not.toThrow();
       expect(() => logger.warn('msg', null)).not.toThrow();
       expect(() => logger.error('msg', null)).not.toThrow();
-      const output = JSON.parse(consoleSpy.log.mock.calls[0][0]);
-      expect(output.message).toBe('msg');
-      expect(output.requestId).toBe('req-1');
-    });
-
-    it('context 中同名字段应覆盖基础字段（Object.assign 语义）', () => {
-      const logger = createLogger('test-fn', 'req-1');
-      logger.info('override test', { message: 'overridden' });
-      const output = JSON.parse(consoleSpy.log.mock.calls[0][0]);
-      // Object.assign 后 context 中的 message 覆盖基础字段
-      expect(output.message).toBe('overridden');
+      const output = consoleSpy.log.mock.calls[0][0];
+      expect(output).toContain('[INFO] [test-fn] [req-1] msg');
     });
 
     it('warn 应该输出到 console.warn', () => {
       const logger = createLogger('test-fn', 'req-1');
       logger.warn('warning msg');
       expect(consoleSpy.warn).toHaveBeenCalledTimes(1);
-      const output = JSON.parse(consoleSpy.warn.mock.calls[0][0]);
-      expect(output.level).toBe('WARN');
+      const output = consoleSpy.warn.mock.calls[0][0];
+      expect(output).toContain('[WARN]');
+      expect(output).toContain('warning msg');
     });
 
     it('error 应该输出到 console.error', () => {
       const logger = createLogger('test-fn', 'req-1');
       logger.error('error msg', { stack: 'fake stack' });
       expect(consoleSpy.error).toHaveBeenCalledTimes(1);
-      const output = JSON.parse(consoleSpy.error.mock.calls[0][0]);
-      expect(output.level).toBe('ERROR');
-      expect(output.stack).toBe('fake stack');
+      const output = consoleSpy.error.mock.calls[0][0];
+      expect(output).toContain('[ERROR]');
+      expect(output).toContain('error msg');
+      expect(output).toContain('stack=fake stack');
     });
 
     it('DEBUG 日志在非 DEBUG 环境下应该被抑制', () => {
@@ -101,9 +101,9 @@ describe('server-logger', () => {
       process.env.LOG_LEVEL = 'DEBUG';
       const logger = createLogger('test-fn', 'req-1');
       logger.debug('debug msg');
-      const output = JSON.parse(consoleSpy.log.mock.calls[0][0]);
-      expect(output.level).toBe('DEBUG');
-      expect(output.message).toBe('debug msg');
+      const output = consoleSpy.log.mock.calls[0][0];
+      expect(output).toContain('[DEBUG]');
+      expect(output).toContain('debug msg');
       if (originalLevel) process.env.LOG_LEVEL = originalLevel;
       else delete process.env.LOG_LEVEL;
     });
@@ -144,12 +144,21 @@ describe('server-logger', () => {
       const logger2 = createLogger('fn-b', 'req-2');
       logger1.info('from a');
       logger2.info('from b');
-      const out1 = JSON.parse(consoleSpy.log.mock.calls[0][0]);
-      const out2 = JSON.parse(consoleSpy.log.mock.calls[1][0]);
-      expect(out1.function).toBe('fn-a');
-      expect(out1.requestId).toBe('req-1');
-      expect(out2.function).toBe('fn-b');
-      expect(out2.requestId).toBe('req-2');
+      const out1 = consoleSpy.log.mock.calls[0][0];
+      const out2 = consoleSpy.log.mock.calls[1][0];
+      expect(out1).toContain('[fn-a]');
+      expect(out1).toContain('[req-1]');
+      expect(out2).toContain('[fn-b]');
+      expect(out2).toContain('[req-2]');
+    });
+
+    it('日志格式应该方便用户复制（一行一条）', () => {
+      const logger = createLogger('giffgaff-graphql', 'abc-123');
+      logger.info('calling_upstream', { operationName: 'getESims', isSwap: false });
+      const output = consoleSpy.log.mock.calls[0][0];
+      // 确认是单行、无换行符、包含所有关键信息
+      expect(output).not.toContain('\n');
+      expect(output).toBe('[INFO] [giffgaff-graphql] [abc-123] calling_upstream | operationName=getESims isSwap=false');
     });
   });