body{font:16px/1.55 system-ui,Segoe UI,Arial,sans-serif;max-width:760px;margin:0 auto;padding:24px 16px;color:#1f2933;background:#fff}
h1{font-size:1.7rem}h2{font-size:1.2rem;margin-top:1.6rem}nav a{margin-right:14px}footer{margin-top:2.5rem;color:#52606d;font-size:.9rem}
code{background:#f0f4f8;padding:1px 5px;border-radius:4px}.lang{color:#52606d;font-size:.9rem}