:root{color-scheme:light;--ink:#15343b;--muted:#58757d;--accent:#087f80;--line:#d5e3e8}
*{box-sizing:border-box}body{margin:0;background:#f5f9fa;color:var(--ink);font:16px/1.8 system-ui,-apple-system,"PingFang SC",sans-serif}a{color:var(--accent);text-underline-offset:4px}a:focus-visible{outline:3px solid var(--accent);outline-offset:4px}header,main,footer{width:min(820px,100%);margin:auto;padding:24px}header{display:flex;gap:20px;align-items:center;justify-content:space-between;flex-wrap:wrap}header nav,footer nav{display:flex;gap:20px;flex-wrap:wrap}header .brand{font-size:20px;font-weight:700;text-decoration:none}main{padding-top:12px}h1{font-size:clamp(28px,5vw,40px);line-height:1.25;letter-spacing:-.02em;margin:16px 0}h2{font-size:21px;line-height:1.4;margin:0 0 12px}p{margin:0 0 14px}.lead,.muted{color:var(--muted)}section{background:#fff;border:1px solid var(--line);border-radius:18px;padding:24px;margin:22px 0}.contact{border-left:4px solid var(--accent)}.contact a{overflow-wrap:anywhere}ul,ol{padding-left:24px;margin:12px 0}li+li{margin-top:8px}footer{font-size:13px;color:var(--muted)}[hidden]{display:none!important}.notice{padding:12px 16px;background:#eaf5f3;border-radius:10px}code{overflow-wrap:anywhere}@media(max-width:420px){header,main,footer{padding:20px}section{padding:20px}}