:root{color-scheme:light dark;--bg:#f7f7f5;--surface:#fff;--text:#222628;--body:#454b4e;--muted:#62696d;--line:#d9dddc;--link:#205c50;--note:#edeeea;font-family:system-ui,-apple-system,BlinkMacSystemFont,"HarmonyOS Sans SC","PingFang SC","Microsoft YaHei",sans-serif;font-size:100%;line-height:1.75;background:var(--bg);color:var(--text)}
@media(prefers-color-scheme:dark){:root{--bg:#17191a;--surface:#202324;--text:#f0f1ef;--body:#c6cbc9;--muted:#a4adaa;--line:#3b4240;--link:#a1cfbd;--note:#242929}}
*{box-sizing:border-box}body{margin:0}a{color:var(--link);text-underline-offset:.22em;overflow-wrap:anywhere}a:hover{text-decoration-thickness:.12em}a:focus-visible,summary:focus-visible{outline:2px solid var(--link);outline-offset:5px;border-radius:2px}img{display:block;max-width:100%;height:auto}.skip{position:absolute;left:1rem;top:-8rem;background:var(--surface);padding:.7rem;z-index:3}.skip:focus{top:.5rem}.site-header,main,footer{max-width:54rem;margin-inline:auto;padding-inline:1.5rem}.site-header{display:flex;align-items:center;justify-content:space-between;gap:1.5rem;flex-wrap:wrap;padding-block:1.5rem;border-bottom:1px solid var(--line)}.brand{display:flex;align-items:center;gap:.7rem;font-size:1.2rem;font-weight:650;color:var(--text);text-decoration:none}.brand img{width:2.25rem;height:2.25rem;border-radius:.5rem}.site-header nav{display:flex;gap:1.2rem;flex-wrap:wrap;font-size:.875rem}main{padding-top:2.5rem;padding-bottom:4rem;min-height:65vh}h1{font-size:clamp(1.8rem,5vw,2.65rem);line-height:1.3;letter-spacing:-.025em;margin:.7rem 0 1.4rem;overflow-wrap:anywhere}h2{font-size:1.2rem;line-height:1.5;margin:0 0 1rem;font-weight:650;color:var(--text)}p{margin:.9rem 0;overflow-wrap:anywhere;color:var(--body)}section{margin-top:2.4rem;scroll-margin-block-start:1.5rem}.eyebrow{font-size:.75rem;letter-spacing:.12em;color:var(--muted)}.notice{padding:1rem 1.25rem;background:var(--note);border-left:3px solid var(--muted);font-size:.875rem;line-height:1.7;margin-bottom:2rem;color:var(--body)}.metadata{display:flex;gap:1.25rem 2.5rem;flex-wrap:wrap;margin:1rem 0 2rem;font-size:.875rem}.metadata div{min-width:6rem}.metadata dt{color:var(--muted)}.metadata dd{margin:0;overflow-wrap:anywhere}.contents{border-block:1px solid var(--line);padding:1rem 0;margin:2rem 0}.contents p{margin:0;font-weight:600;color:var(--text)}.contents ol{padding-left:1.5rem;margin:.75rem 0}.contents li{margin:.3rem 0}.integrity{border-top:1px solid var(--line);padding-top:1rem;margin-top:3rem;color:var(--muted);font-size:.8rem}summary{cursor:pointer}code{white-space:normal;overflow-wrap:anywhere;font-size:inherit}.lead{font-size:1.1rem;max-width:42rem;color:var(--body)}.home{padding-top:.5rem}.home h1{font-size:clamp(2.6rem,7vw,4.25rem);line-height:1.15;margin-block:1.8rem}.availability{font-size:.875rem;color:var(--muted);margin-top:1.5rem}.features{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:1.7rem;margin-top:3rem;border-top:1px solid var(--line)}.features h2{font-size:1rem}.features p{font-size:.9rem}.home-links{display:flex;gap:1rem 1.7rem;flex-wrap:wrap;margin-top:2rem;font-size:.9rem}footer{padding-block:1.8rem;border-top:1px solid var(--line);font-size:.8rem;color:var(--muted)}footer p{color:var(--muted)}.footer-links{display:flex;gap:.6rem 1.5rem;flex-wrap:wrap}ul{padding-left:1.4rem}li{margin:.5rem 0}strong{font-weight:650;color:var(--text)}
@media(max-width:38rem){.features{grid-template-columns:1fr;gap:0}.features section{margin-top:1.5rem}.site-header,main,footer{padding-inline:1.25rem}.site-header nav{gap:.75rem}.metadata{gap:.75rem 1.5rem}main{padding-top:1.75rem}.home h1{margin-block:1.4rem}}
@media print{:root{color-scheme:light;--bg:#fff;--text:#000;--body:#222;--muted:#444;--line:#ccc;--link:#222;--note:#eee}.site-header,footer,.skip{display:none}main{max-width:none;padding:0}.contents{break-inside:avoid}h2{break-after:avoid}section{margin-top:1.5rem}a{text-decoration:none}}