:root{color-scheme:light;--paper:#f7f6f0;--ink:#232321;--muted:#60615a;--line:#deded3;--accent:#a13b20}
*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;background:var(--paper);color:var(--ink);font:17px/1.85 -apple-system,BlinkMacSystemFont,"PingFang SC","Microsoft YaHei",sans-serif}header,main,footer{width:min(100% - 40px,760px);margin:auto}header{padding:28px 0;border-bottom:1px solid var(--line);display:flex;align-items:center;justify-content:space-between;gap:16px}header a{color:var(--ink);text-decoration:none;font-weight:650}nav{display:flex;gap:20px;font-size:14px}nav a[aria-current=page]{text-decoration:underline;text-underline-offset:6px}main{padding:54px 0 40px}h1{font-size:clamp(29px,5vw,44px);line-height:1.25;letter-spacing:-1px;margin:12px 0 20px}h2{font-size:22px;line-height:1.5;margin:38px 0 12px}p{margin:12px 0}.eyebrow{font-size:12px;letter-spacing:2px;color:var(--accent);font-weight:650}.meta{font-size:14px;color:var(--muted)}.lead{font-size:19px;color:var(--muted)}.note{padding:18px 22px;background:#ecece3;border-left:3px solid var(--ink);border-radius:0 10px 10px 0;margin:26px 0}.contact{padding:26px;border:1px solid var(--line);border-radius:18px;margin:32px 0;background:#fffdf8}.contact h2{margin-top:0}a{color:var(--accent);text-underline-offset:3px}a:focus-visible,summary:focus-visible{outline:3px solid var(--accent);outline-offset:5px;border-radius:3px}ul,ol{padding-left:24px}li{margin:8px 0}details{padding:20px 0;border-bottom:1px solid var(--line)}summary{font-size:18px;font-weight:650;cursor:pointer}details p{color:var(--muted)}footer{border-top:1px solid var(--line);padding:25px 0 40px;color:var(--muted);font-size:13px}.button{display:inline-block;border:1px solid var(--ink);border-radius:10px;padding:10px 18px;background:var(--ink);color:#fff;text-decoration:none;font-weight:600}.skip{position:absolute;left:16px;top:-100px;background:white;padding:8px}.skip:focus{top:12px}@media(max-width:480px){header{align-items:flex-start;flex-direction:column}main{padding-top:34px}nav{gap:24px}}@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}}