body{margin:0;font:16px/1.6 -apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,Helvetica,Arial,sans-serif;color:#1a1a1a;background:#fff}
main{max-width:720px;margin:0 auto;padding:24px 16px 64px}
h1{font-size:26px;line-height:1.25}
h2{font-size:19px;margin-top:28px}
a{color:#0a7d3b}
.box{background:#f6f6f3;border-radius:12px;padding:16px;white-space:pre-line}
.back{display:inline-block;margin-bottom:8px}