server {
    listen 80;
    server_name localhost;

    # 基础设置
    root /usr/share/nginx/html;
    index index.html index.htm;

    try_files $uri $uri/ /index.html;

    client_max_body_size 100m;
    
    # 错误页面配置
    error_page 500 502 503 504 /50x.html;
    location = /50x.html {
        internal;  # 仅用于内部错误请求
    }

    # Gzip 压缩设置
    gzip on;
    gzip_min_length 1k;
    gzip_comp_level 6;
    gzip_types text/plain text/css text/javascript application/json 
               application/javascript application/x-javascript application/xml;
    gzip_vary on;
    gzip_disable "MSIE [1-6]\.";

    # 静态资源缓存优化
    location ~* \.(jpg|jpeg|gif|ico|css|js)$ {
        expires 7d;
        add_header Cache-Control "public, no-transform";
    }
}