:root{color-scheme:light dark;--bg:#fff;--text:#0d0d0d;--muted:#5d5d5d;--line:#e5e5e5;--soft:#f9f9f9}*{box-sizing:border-box}body{margin:0;background:var(--bg);color:var(--text);font:16px/1.85 system-ui,'Segoe UI',Tahoma,sans-serif}a{color:inherit;text-underline-offset:4px}a:focus-visible{outline:2px solid #007aff;outline-offset:4px}header,main,footer{max-width:880px;margin:auto;padding:24px}header{display:flex;align-items:center;justify-content:space-between;border-bottom:1px solid var(--line);gap:20px}.brand{display:flex;align-items:center;gap:12px;text-decoration:none;font-weight:600}.brand img{width:48px;height:48px;border-radius:10px}nav{display:flex;gap:16px;font-size:14px}h1{font-size:32px;line-height:1.4;font-weight:600;margin:24px 0 12px}h2{font-size:21px;font-weight:600;margin:28px 0 8px}h3{font-size:17px;font-weight:600}p{margin:10px 0}ul,ol{padding-inline-start:24px}li{margin:7px 0}.muted{color:var(--muted);font-size:14px}.intro{font-size:20px;max-width:650px}.callout{background:var(--soft);border:1px solid var(--line);border-radius:14px;padding:18px;margin:24px 0}.actions{display:flex;flex-wrap:wrap;gap:10px;margin:24px 0}.button{display:inline-block;padding:8px 18px;border:1px solid var(--line);border-radius:16px;text-decoration:none;font-size:14px}.button.primary{background:var(--text);color:var(--bg)}footer{font-size:13px;border-top:1px solid var(--line);color:var(--muted)}.english{direction:ltr;text-align:left;border-top:1px solid var(--line);margin-top:32px;padding-top:12px}code{font:13px/1.7 ui-monospace,monospace;background:var(--soft);border-radius:5px;padding:2px 6px;direction:ltr;display:inline-block}@media(max-width:600px){header{align-items:flex-start;flex-direction:column;gap:12px}header,main,footer{padding:20px}h1{font-size:27px}nav{flex-wrap:wrap}}@media(prefers-color-scheme:dark){:root{--bg:#181818;--text:#f5f5f5;--muted:#b7b7b7;--line:#454545;--soft:#242424}}