:80 {
    root * /usr/share/caddy
    file_server {
        precompressed br gzip
    }

    encode {
        gzip
    }

    # 安全头配置保持不变
    header /* {
        X-Content-Type-Options "nosniff"
        X-Frame-Options "DENY"
        Referrer-Policy "strict-origin-when-cross-origin"
    }

    # 缓存策略优化
    header {
        # 默认动态内容不缓存
        Cache-Control "no-cache, must-revalidate"
        
        # 静态资源缓存（改进正则表达式）
        @static {
            path_regexp \.(?:css|js|png|jpe?g|gif|ico|svg|woff2?|ttf|eot|web[pm]|avif)$
        }
        header @static Cache-Control "public, max-age=31536000, immutable"
    }

    # SPA路由处理优化（通用方案）
    @spa {
        not file
    }
    rewrite @spa /index.html

    # 日志配置（保持精简）
    log {
        output stdout
        format json {
            time_format iso8601
        }
        format filter {
            fields {
                request>remote_ip delete
                request>remote_port delete
                request>proto delete
                request>method delete
                request>headers delete
                resp_headers delete
            }
            wrap json
        }
    }

    # 错误处理
    handle_errors {
        @404 {
            expression {http.error.status_code} == 404
        }
        respond @404 "Not Found" 404
    }
}