diff --git a/site/nginx/nginx.conf b/site/nginx/nginx.conf
index d4b49a87..808708a9 100644
--- a/site/nginx/nginx.conf
+++ b/site/nginx/nginx.conf
@@ -95,15 +95,33 @@ http {
             proxy_set_header X-Forwarded-Proto $scheme;
             proxy_cache_bypass $http_upgrade;
             
+            # 代理缓冲区配置（优化大文件传输）
+            proxy_buffer_size 16k;
+            proxy_buffers 8 16k;
+            proxy_busy_buffers_size 32k;
+            proxy_temp_file_write_size 64k;
+            proxy_max_temp_file_size 1024m;
+            
             # 超时设置
             proxy_connect_timeout 60s;
             proxy_send_timeout 60s;
             proxy_read_timeout 60s;
         }
 
-        # 静态文件缓存
+        # 静态文件缓存（优化大图片文件）
         location ~* \.(jpg|jpeg|png|gif|ico|css|js|svg|woff|woff2|ttf|eot)$ {
             proxy_pass http://marketing-site:3000;
+            
+            # 静态文件专用缓冲区配置（更大的缓冲区）
+            proxy_buffer_size 32k;
+            proxy_buffers 16 32k;
+            proxy_busy_buffers_size 64k;
+            proxy_temp_file_write_size 128k;
+            proxy_max_temp_file_size 2048m;
+            
+            # 启用直接传输，减少内存使用
+            proxy_request_buffering off;
+            
             proxy_cache_valid 200 1d;
             expires 1d;
             add_header Cache-Control "public, immutable";