diff --git a/docs/architecture/system-architecture.md b/docs/architecture/system-architecture.md
index beb80f2..00ebff3 100644
--- a/docs/architecture/system-architecture.md
+++ b/docs/architecture/system-architecture.md
@@ -327,7 +327,7 @@ func TraceMiddleware() gin.HandlerFunc {
 ```json
 {
     "level": "info",
-    "ts": "2026-02-27 10:30:00.123",
+    "ts": "2026-02-27 10:30:00",
     "trace_id": "abc-123-def-456",
     "module": "auth",
     "func": "service.auth_service.Login",
diff --git a/docs/plans/2026-02-27-phase1-foundation-and-auth.md b/docs/plans/2026-02-27-phase1-foundation-and-auth.md
index ab388e8..3ad3637 100644
--- a/docs/plans/2026-02-27-phase1-foundation-and-auth.md
+++ b/docs/plans/2026-02-27-phase1-foundation-and-auth.md
@@ -203,12 +203,12 @@ type LogConfig struct {
 
 **日志输出格式示例（开发环境）：**
 ```
-2026-02-27 10:30:00.123 INFO  [abc-123] auth | service.Login | 用户登录成功 | account=zhangsan | latency=25ms
+2026-02-27 10:30:00 INFO  [abc-123] auth | service.Login | 用户登录成功 | account=zhangsan | latency=25ms
 ```
 
 **日志输出格式示例（生产环境 JSON）：**
 ```json
-{"level":"info","ts":"2026-02-27 10:30:00.123","trace_id":"abc-123","module":"auth","func":"service.Login","msg":"用户登录成功","account":"zhangsan","latency_ms":25}
+{"level":"info","ts":"2026-02-27 10:30:00","trace_id":"abc-123","module":"auth","func":"service.Login","msg":"用户登录成功","account":"zhangsan","latency_ms":25}
 ```
 
 **Step 4: 创建数据库连接**