Cache-Control示例：Cache-Control: max-age=3600, public作用：强制缓存1小时，允许代理/CDN缓存。Content-Encoding示例：Content-Encoding: gzip作用：启用Gzip压缩，减少传输体积。Strict-Transport-Security (HSTS)示例：Strict-Transport-Security: max-a
