body{font:17px/1.65 -apple-system,Segoe UI,Helvetica,Arial,sans-serif;max-width:700px;margin:48px auto;padding:0 16px;color:#1d1d1f;background:#fff}
header{margin-bottom:28px}header a{color:#1d1d1f;text-decoration:none}nav a{margin-right:16px;color:#6e6e73;font-size:15px}
h1{font-size:26px;margin:0 0 6px}.d{color:#86868b;font-size:14px}article{margin-bottom:34px}a{color:#0066cc}
footer{margin-top:48px;padding-top:12px;border-top:1px solid #e5e5e5;font-size:13px;color:#86868b}