:root{--bg:#f7f8fa;--surface:#fff;--text:#172033;--muted:#5e6b7b;--line:#e5e9ef;--brand:#1f6f5f;--brand2:#164f45;--accent:#f0b44d;--max:1180px;--content:760px}
*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;font-family:Inter,ui-sans-serif,system-ui,-apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif;background:var(--bg);color:var(--text);line-height:1.72}
a{color:var(--brand2);text-decoration-thickness:1px;text-underline-offset:3px}a:hover{color:var(--brand)}img{max-width:100%}
.skip{position:absolute;left:-999px;top:0}.skip:focus{left:12px;top:12px;background:#fff;padding:10px 14px;z-index:9999;border:2px solid var(--brand)}
.site-header{background:#fff;border-bottom:1px solid var(--line);position:sticky;top:0;z-index:100}.nav-wrap{max-width:var(--max);margin:auto;padding:12px 22px;display:flex;align-items:center;gap:20px}
.brand{display:flex;align-items:center;gap:10px;color:var(--text);text-decoration:none;font-weight:800;white-space:nowrap}.brand-mark{width:34px;height:34px;border-radius:10px;background:linear-gradient(135deg,var(--brand),#3fa788);display:grid;place-items:center;color:#fff;font-weight:900}
.nav{display:flex;gap:16px;align-items:center;margin-left:auto}.nav a{text-decoration:none;color:var(--text);font-weight:650;font-size:.95rem}.nav a:hover{color:var(--brand)}
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;background:var(--brand);color:#fff!important;text-decoration:none!important;border-radius:10px;padding:11px 16px;font-weight:800;line-height:1.2;border:1px solid transparent}.btn:hover{background:var(--brand2)}.btn.ghost{background:#fff;color:var(--brand2)!important;border-color:var(--line)}
.menu-btn{display:none;margin-left:auto;background:#fff;border:1px solid var(--line);border-radius:8px;padding:9px 11px;font-weight:700}
.hero{background:radial-gradient(circle at top right,#ddf3eb,transparent 35%),linear-gradient(180deg,#fff,#f7f8fa);border-bottom:1px solid var(--line)}.hero-inner{max-width:var(--max);margin:auto;padding:70px 22px}.eyebrow{display:inline-block;color:var(--brand2);font-weight:800;text-transform:uppercase;letter-spacing:.08em;font-size:.78rem}.hero h1,.article h1{font-size:clamp(2.25rem,5vw,4.35rem);line-height:1.05;letter-spacing:-.045em;margin:.35em 0 .25em;max-width:930px}.hero p{font-size:1.2rem;max-width:760px;color:var(--muted)}.hero-actions{display:flex;gap:12px;flex-wrap:wrap;margin-top:28px}
.wrap{max-width:var(--max);margin:auto;padding:38px 22px}.grid{display:grid;grid-template-columns:minmax(0,1fr) 300px;gap:44px;align-items:start}.article{background:#fff;border:1px solid var(--line);border-radius:18px;padding:38px;box-shadow:0 10px 30px rgba(23,32,51,.04)}
.article h1{font-size:clamp(2.2rem,4vw,3.6rem)}.article h2{font-size:1.65rem;line-height:1.2;margin-top:2.1em}.article h3{font-size:1.15rem;margin-top:1.7em}.article p,.article li{font-size:1.04rem}.lead{font-size:1.18rem!important;color:var(--muted)}.meta{color:var(--muted);font-size:.9rem;margin-bottom:24px}.breadcrumbs{font-size:.88rem;margin:0 0 18px;color:var(--muted)}.breadcrumbs a{color:var(--muted)}
.sidebar{position:sticky;top:88px}.card{background:#fff;border:1px solid var(--line);border-radius:16px;padding:22px;margin-bottom:18px}.card h3{margin-top:0}.card p{color:var(--muted);font-size:.95rem}
.cta{background:linear-gradient(135deg,#edf8f4,#fff);border:1px solid #cfe8df;border-radius:16px;padding:24px;margin:30px 0}.cta strong{display:block;font-size:1.2rem;margin-bottom:8px}.cta small{display:block;color:var(--muted);margin-top:10px}
.callout{background:#fff8ea;border-left:4px solid var(--accent);padding:16px 18px;border-radius:8px;margin:24px 0}.toc{background:#f9fafb;border:1px solid var(--line);border-radius:12px;padding:18px 20px}.toc strong{display:block;margin-bottom:6px}.toc a{display:block;margin:5px 0}
.table-wrap{overflow-x:auto}.comparison{width:100%;border-collapse:collapse;margin:24px 0}.comparison th,.comparison td{border:1px solid var(--line);padding:12px;text-align:left;vertical-align:top}.comparison th{background:#f6f8f9}
.cards{display:grid;grid-template-columns:repeat(3,1fr);gap:18px}.topic-card{background:#fff;border:1px solid var(--line);border-radius:16px;padding:22px;text-decoration:none;color:var(--text)}.topic-card:hover{border-color:#bddbd1;transform:translateY(-1px)}.topic-card p{color:var(--muted)}
.related{display:grid;grid-template-columns:repeat(2,1fr);gap:14px}.related a{background:#f8faf9;border:1px solid var(--line);border-radius:10px;padding:14px;text-decoration:none;font-weight:700}
.disclosure{font-size:.9rem;color:var(--muted);background:#f9fafb;border:1px solid var(--line);border-radius:10px;padding:12px 14px}
footer{background:#111a27;color:#dce3ea;margin-top:60px}.footer-inner{max-width:var(--max);margin:auto;padding:42px 22px;display:grid;grid-template-columns:2fr 1fr 1fr;gap:28px}footer a{color:#e9f2ef}.footer-note{max-width:var(--max);margin:auto;padding:0 22px 28px;color:#9eabb9;font-size:.88rem}
.mobile-cta{display:none;position:fixed;left:10px;right:10px;bottom:10px;z-index:120;background:var(--brand);color:#fff!important;text-decoration:none;text-align:center;padding:14px;border-radius:12px;font-weight:850;box-shadow:0 10px 30px rgba(0,0,0,.2)}
@media(max-width:900px){.grid{grid-template-columns:1fr}.sidebar{position:static}.cards{grid-template-columns:1fr 1fr}.nav{display:none;position:absolute;left:14px;right:14px;top:64px;background:#fff;border:1px solid var(--line);border-radius:12px;padding:14px;box-shadow:0 18px 40px rgba(0,0,0,.12);flex-direction:column;align-items:stretch}.nav.open{display:flex}.menu-btn{display:block}.header-cta{display:none}.mobile-cta{display:block}body{padding-bottom:72px}}
@media(max-width:620px){.article{padding:24px 20px}.cards,.related{grid-template-columns:1fr}.hero-inner{padding-top:48px}.footer-inner{grid-template-columns:1fr}.brand span:last-child{display:none}}