server {
    listen       80;
    server_name  _;
    root         /usr/share/nginx/html;
    index        index.html;

    # Vue Router history 模式：所有未匹配的路径回落到 index.html
    location / {
        try_files $uri $uri/ /index.html;
    }

    # Vite 构建产物带 hash，可安全设置长期缓存
    location /assets/ {
        expires 1y;
        add_header Cache-Control "public, immutable";
    }

    # gzip 压缩
    gzip            on;
    gzip_min_length 1024;
    gzip_comp_level 6;
    gzip_types
        text/plain
        text/css
        text/javascript
        application/javascript
        application/json
        application/xml
        image/svg+xml;

    # 基础安全头
    add_header X-Content-Type-Options "nosniff";
    add_header X-Frame-Options        "SAMEORIGIN";
}