:root{color-scheme:light;--paper:#f8f6ef;--ink:#292925;--muted:#68675f;--line:#ddd9cd;--accent:#c7723e}*{box-sizing:border-box}body{margin:0;background:var(--paper);color:var(--ink);font:17px/1.8 -apple-system,BlinkMacSystemFont,"PingFang SC","Microsoft YaHei",sans-serif}main{max-width:780px;margin:auto;padding:30px 24px 60px}nav{display:flex;justify-content:space-between;gap:20px;margin-bottom:45px;font-size:15px}a{color:var(--accent);text-underline-offset:4px}header{margin-bottom:40px}header img{border-radius:22px;margin-bottom:10px}h1{font-size:40px;line-height:1.35;font-weight:650;letter-spacing:-.03em;margin:20px 0}h2{font-size:24px;line-height:1.4;margin:0 0 14px}h3{font-size:18px;margin:22px 0 8px}p{margin:10px 0 18px}section{border-top:1px solid var(--line);padding-top:28px;margin-top:32px}ol{padding-left:24px}li{margin:9px 0}footer{font-size:13px;color:var(--muted);margin-top:48px} @media(max-width:480px){h1{font-size:34px}main{padding:22px 20px 40px}}