diff --git a/电商AI平台/nginx.conf b/电商AI平台/nginx.conf
index 106342f..c2fd5f0 100644
--- a/电商AI平台/nginx.conf
+++ b/电商AI平台/nginx.conf
@@ -14,10 +14,23 @@ server {
     add_header Referrer-Policy "strict-origin-when-cross-origin" always;
     add_header Permissions-Policy "camera=(), microphone=(), geolocation=()" always;
 
-    # Cache static assets (CSS/JS/images/fonts)
-    location ~* \.(css|js|png|jpg|jpeg|gif|ico|svg|woff|woff2|ttf|eot|mp4|webm)$ {
-        expires 30d;
-        add_header Cache-Control "public, immutable";
+    # 设计稿迭代期:CSS/JS 不带 hash,不能用 immutable,否则改了浏览器仍吃旧版
+    # 缓存 1 小时 + must-revalidate(过期后用 If-Modified-Since 回源验证,服务器没改返回 304,改了取新文件)
+    location ~* \.(css|js)$ {
+        expires 1h;
+        add_header Cache-Control "public, must-revalidate";
+    }
+
+    # 图片/字体/媒体:可以缓存稍长(改动频率低),仍允许重新验证
+    location ~* \.(png|jpg|jpeg|gif|ico|svg|woff|woff2|ttf|eot|mp4|webm)$ {
+        expires 7d;
+        add_header Cache-Control "public, must-revalidate";
+    }
+
+    # HTML:不进浏览器磁盘缓存,每次都问服务器有没有新版本
+    location ~* \.html$ {
+        add_header Cache-Control "no-cache, must-revalidate" always;
+        expires off;
     }
 
     # Multi-page (not SPA): try exact file, then .html fallback (friendly URLs), then 404.