diff --git a/nginx.conf b/nginx.conf
index 7a40a86..6ee5365 100644
--- a/nginx.conf
+++ b/nginx.conf
@@ -43,7 +43,10 @@ http {
     gzip_proxied any;
     gzip_vary on;
 
-    # --- SSL 会话缓存 ---
+    # --- SSL 安全配置 ---
+    ssl_protocols TLSv1.2 TLSv1.3;
+    ssl_ciphers ECDHE-ECDSA-AES128-GCM-SHA256:ECDHE-RSA-AES128-GCM-SHA256:ECDHE-ECDSA-AES256-GCM-SHA384:ECDHE-RSA-AES256-GCM-SHA384:ECDHE-ECDSA-CHACHA20-POLY1305:ECDHE-RSA-CHACHA20-POLY1305;
+    ssl_prefer_server_ciphers on;
     ssl_session_cache shared:SSL:10m;
     ssl_session_timeout 1d;
     ssl_session_tickets on;