diff --git a/internal/middleware/security.go b/internal/middleware/security.go
index cab764d..59a42bf 100644
--- a/internal/middleware/security.go
+++ b/internal/middleware/security.go
@@ -4,6 +4,8 @@ import (
 	"crypto/rand"
 	"encoding/base64"
 
+	"metazone.cc/metalab/internal/config"
+
 	"github.com/gin-gonic/gin"
 )
 
@@ -44,6 +46,11 @@ func SecurityHeaders() gin.HandlerFunc {
 		// 引用策略
 		c.Header("Referrer-Policy", "strict-origin-when-cross-origin")
 
+		// HSTS：仅在 release 模式启用，避免开发环境 localhost 证书问题
+		if config.App != nil && config.App.Server.Mode == "release" {
+			c.Header("Strict-Transport-Security", "max-age=31536000; includeSubDomains; preload")
+		}
+
 		c.Next()
 	}
 }