diff --git a/deploy/nginx/frontend.conf b/deploy/nginx/frontend.conf
index 080b099..c77d17c 100644
--- a/deploy/nginx/frontend.conf
+++ b/deploy/nginx/frontend.conf
@@ -6,6 +6,13 @@ server {
     listen 8000;
     server_name _;
 
+    # 与 .env MAX_FILE_SIZE=104857600（100MB）对齐；nginx 默认 1m 会直接 413
+    client_max_body_size 100M;
+
+    # 大文件上传给后端足够时间（默认 60s，100MB 可能不够）
+    proxy_read_timeout 300s;
+    proxy_send_timeout 300s;
+
     root /usr/share/nginx/html;
     index index.html;