server {
    listen 80;
    server_name _;

    root /usr/share/nginx/html;
    index index.html;

    # MkDocs Material 使用 SPA 风格路由，需要回退到 index.html
    location / {
        try_files $uri $uri/ $uri.html /index.html;
    }

    # 404 也回退到 index.html（搜索功能需要）
    error_page 404 /404.html;

    # Gzip 压缩
    gzip on;
    gzip_types text/plain text/css application/json application/javascript text/xml application/xml application/xml+rss text/javascript;
    gzip_min_length 256;

    # 静态资源缓存
    location ~* \.(js|css|png|jpg|jpeg|gif|ico|svg|woff|woff2|ttf|eot)$ {
        expires 7d;
        add_header Cache-Control "public, no-transform";
    }
}