server {
    listen 80;
    server_name localhost;

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

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

    # SPA 路由 fallback：所有非文件请求回退到 index.html
    location / {
        try_files $uri $uri/ /index.html;
    }

    # 静态资源长缓存（Vite 构建产物带 hash）
    location /assets/ {
        expires 1y;
        add_header Cache-Control "public, immutable";
    }

    # SVG / 图片缓存
    location ~* \.(svg|png|jpg|jpeg|gif|ico|webp)$ {
        expires 30d;
        add_header Cache-Control "public";
    }
}