:root{color-scheme:light dark;--bg:#f6f5f0;--surface:#fff;--ink:#203b30;--muted:#5e6a61;--accent:#285641;--line:#dce1d7}*{box-sizing:border-box}body{margin:0;background:var(--bg);color:var(--ink);font:17px/1.8 -apple-system,BlinkMacSystemFont,"PingFang SC",sans-serif}header,main,footer{max-width:860px;margin:auto;padding:28px 24px}header{display:flex;gap:24px;align-items:center;justify-content:space-between;border-bottom:1px solid var(--line)}header a{font-weight:650;text-decoration:none}nav{display:flex;gap:24px;flex-wrap:wrap}a{color:var(--accent);text-underline-offset:4px}a:focus-visible,summary:focus-visible{outline:3px solid var(--accent);outline-offset:5px}h1{font-size:clamp(28px,5vw,40px);line-height:1.25;letter-spacing:-.03em;margin:32px 0 16px}h2{font-size:23px;line-height:1.4;margin:32px 0 12px}p{margin:0 0 18px}small,.muted,footer{color:var(--muted)}section{margin:28px 0}.callout{background:var(--surface);padding:22px 24px;border-radius:16px;border:1px solid var(--line)}details{padding:18px 0;border-bottom:1px solid var(--line)}summary{font-weight:600;cursor:pointer;min-height:44px}details p{margin:12px 0 0}footer{border-top:1px solid var(--line);font-size:14px}li{margin:8px 0}code{word-break:break-all}@media(prefers-color-scheme:dark){:root{--bg:#18211d;--surface:#24322b;--ink:#f2f4ec;--muted:#adbeb1;--accent:#bbd7c3;--line:#425247}}@media(max-width:520px){header{align-items:flex-start;flex-direction:column;gap:8px}header,main,footer{padding:22px 20px}}