:root{color-scheme:light;--paper:#f7f6f2;--ink:#202621;--muted:#626b65;--line:#d7ddd6;--accent:#216652;font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Microsoft YaHei",sans-serif;color:var(--ink);background:var(--paper)}

*{box-sizing:border-box}
body{margin:0}
a{color:inherit;text-decoration-thickness:1px;text-underline-offset:5px}
a:focus-visible{outline:3px solid var(--accent);outline-offset:5px}
p{line-height:1.95;overflow-wrap:anywhere}
h1,h2{font-weight:650;letter-spacing:-.035em;overflow-wrap:anywhere}
h1{font-size:clamp(34px,5.2vw,68px);line-height:1.23;margin:22px 0}
h2{font-size:clamp(21px,2.6vw,28px);line-height:1.5}
small,.eyebrow{font-size:11px;letter-spacing:.12em;color:var(--accent)}
.skip{position:fixed;top:-80px;padding:14px;background:white;z-index:5}
.skip:focus{top:0}
.masthead,main,footer{width:min(1080px,calc(100% - 64px));margin:auto}
.masthead{display:flex;justify-content:space-between;gap:24px;align-items:center;padding:30px 0;border-bottom:1px solid var(--line)}
.brand{font-size:25px;font-weight:750;letter-spacing:.06em;text-decoration:none}
.brand span{display:block;margin-top:5px;font-size:10px;font-weight:500;letter-spacing:.03em;color:var(--muted)}
nav{display:flex;flex-wrap:wrap;gap:12px 24px;font-size:13px}
.masthead nav a,footer nav a{text-decoration:none}
.hero{padding:76px 0 72px;max-width:820px}
.lead{font-size:clamp(16px,2vw,20px);line-height:1.9;color:var(--muted);max-width:760px}
.button{display:inline-block;margin:18px 0 8px;padding:14px 20px;background:var(--ink);color:white;border-radius:4px;font-size:14px;text-decoration:none}
.button:hover{background:var(--accent)}
.section-heading{display:flex;flex-wrap:wrap;align-items:baseline;justify-content:space-between;gap:0 24px;border-bottom:1px solid var(--ink)}
.section-heading p{font-size:13px;color:var(--muted)}
.entry{display:grid;grid-template-columns:60px minmax(0,1fr) 20px;gap:25px;padding:34px 0;border-bottom:1px solid var(--line);text-decoration:none}
.entry:hover h2{color:var(--accent)}
.number{font-size:32px;font-weight:550;color:var(--accent);letter-spacing:-.05em}
.entry h2{margin:10px 0}
.entry p{font-size:14px;color:var(--muted);margin:0}
.entry>span:last-child{font-size:22px}
.note{margin:54px 0 72px;padding-left:25px;border-left:2px solid var(--accent);max-width:800px}
.note p{font-size:15px;color:var(--muted)}
article{max-width:760px;margin:52px auto 76px}
.back{font-size:13px;color:var(--muted);display:inline-block;margin-bottom:28px;text-decoration:none}
.byline{font-size:12px;color:var(--muted);padding-bottom:28px;border-bottom:1px solid var(--line)}
article section{margin:46px 0}
article section p{font-size:16px;line-height:2.05;margin:16px 0}
.step{display:block;font-size:12px;letter-spacing:.16em;font-weight:500;color:var(--accent);margin-bottom:7px}
.next{margin-top:48px;border-top:1px solid var(--ink);padding-top:22px}
.next p{font-size:15px;color:var(--muted)}
.related{border-top:1px solid var(--line);margin-top:36px;padding-top:24px}
.related a{font-size:13px}
footer{border-top:1px solid var(--line);padding:30px 0 36px}
footer p{font-size:11px;line-height:1.8;color:var(--muted);margin:16px 0 0}
footer p+p{margin-top:6px}

@media(max-width:600px){.masthead,main,footer{width:calc(100% - 40px)}
.masthead{align-items:flex-start;padding:22px 0;gap:18px;flex-direction:column}
.masthead nav{font-size:12px;gap:24px}
.hero{padding:44px 0 42px}
.entry{grid-template-columns:34px minmax(0,1fr) 16px;gap:14px;padding:26px 0}
.number{font-size:25px}
.entry h2{font-size:20px}
.entry p{font-size:13px}
.note{margin:36px 0 48px;padding-left:17px}
article{margin:32px auto 48px}
article h1{font-size:34px}
article section{margin:34px 0}
article section p{font-size:15px}
footer nav{gap:12px 20px}
.back{margin-bottom:20px}
.related{gap:18px}
.button{max-width:100%;overflow-wrap:anywhere}
}

@media(prefers-reduced-motion:reduce){*{scroll-behavior:auto!important}
}