body{color:#fff;background:#000;margin:0;font-family:ui-sans-serif,system-ui,-apple-system,sans-serif;font-size:17px;line-height:1.6}main{max-width:680px;margin:0 auto;padding:80px 20px}h1{margin:0 0 4px;font-size:26px}h2{margin:40px 0 10px;font-size:18px}p{margin:0 0 14px}ol,ul{margin:0 0 14px;padding-left:22px}li{margin:0 0 10px}a{color:#fff}.foot{color:#888;margin-top:48px;font-size:14px}h3{color:#bbb;margin:20px 0 8px;font-size:16px}header{align-items:center;gap:14px;margin:0 0 40px;font-size:14px;display:flex}.logo{width:36px;height:36px;position:fixed;top:16px;left:16px}nav a{color:#666;text-decoration:none}nav a.current{color:#fff}nav .sep{color:#444;margin:0 8px}.demo{border:1px solid #fff;border-radius:4px;margin:8px 0 20px;padding:5px 14px;font-size:14px;text-decoration:none;display:inline-block}.demo.disabled{color:#666;cursor:default;border-color:#444}