:root{
  --ink:#172033;--muted:#5e687a;--bg:#f7f8fc;--paper:#fff;
  --purple:#6c4cf1;--purple2:#8b6cf6;--line:#e7e9f1;--soft:#f0edff;
  --green:#198754;--radius:18px;--shadow:0 12px 35px rgba(25,31,55,.08);
  --max:1180px;
}
*{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;color:var(--ink);background:var(--bg);line-height:1.68}
a{color:#4e37c8;text-decoration-thickness:1px;text-underline-offset:3px}
a:hover{color:#2f1f91}
img{max-width:100%;height:auto}
.skip{position:absolute;left:-9999px;top:0}.skip:focus{left:12px;top:12px;z-index:9999;background:#fff;padding:10px 14px;border:2px solid var(--purple)}
.notice{background:#211a45;color:#fff;font-size:13px;text-align:center;padding:8px 14px}
.site-header{position:sticky;top:0;z-index:80;background:rgba(255,255,255,.97);backdrop-filter:blur(10px);border-bottom:1px solid var(--line)}
.nav{max-width:var(--max);margin:auto;padding:14px 20px;display:flex;align-items:center;gap:22px}
.brand{display:flex;align-items:center;gap:10px;text-decoration:none;color:var(--ink);font-weight:800;white-space:nowrap}
.logo{width:34px;height:34px;border-radius:10px;background:linear-gradient(135deg,var(--purple),var(--purple2));display:grid;place-items:center;color:#fff;font-weight:900}
.navlinks{display:flex;gap:18px;align-items:center;margin-left:auto}
.navlinks a{text-decoration:none;color:#3d4658;font-weight:650;font-size:14px}
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;background:var(--purple);color:#fff!important;text-decoration:none;border:none;border-radius:12px;padding:11px 16px;font-weight:800;box-shadow:0 7px 18px rgba(108,76,241,.18)}
.btn:hover{background:#5136d7}
.btn.secondary{background:#fff;color:var(--purple)!important;border:1px solid #cfc7ff;box-shadow:none}
.menu-btn{display:none;margin-left:auto;background:#fff;border:1px solid var(--line);border-radius:10px;padding:8px 10px}
.hero{max-width:var(--max);margin:auto;padding:64px 20px 34px;display:grid;grid-template-columns:1.45fr .85fr;gap:38px;align-items:center}
.hero h1{font-size:clamp(38px,6vw,66px);line-height:1.02;letter-spacing:-.045em;margin:.2em 0}
.eyebrow{text-transform:uppercase;letter-spacing:.12em;font-size:12px;font-weight:900;color:var(--purple)}
.lede{font-size:20px;color:var(--muted);max-width:760px}
.hero-card,.card,.sidebar-card,.cta-box,.toc,.note{background:var(--paper);border:1px solid var(--line);border-radius:var(--radius);box-shadow:var(--shadow)}
.hero-card{padding:26px}
.wrap{max-width:var(--max);margin:auto;padding:28px 20px 60px}
.section-title{max-width:760px;margin-bottom:22px}.section-title h2{font-size:36px;letter-spacing:-.03em;margin:.2em 0}
.grid{display:grid;grid-template-columns:repeat(3,1fr);gap:18px}
.card{padding:22px}.card h3{margin-top:0}.card p{color:var(--muted)}
.pill{display:inline-block;background:var(--soft);color:#5136d7;border-radius:999px;padding:5px 10px;font-size:12px;font-weight:800}
.article-shell{max-width:var(--max);margin:auto;padding:32px 20px 70px;display:grid;grid-template-columns:minmax(0,1fr) 300px;gap:34px}
.article{background:#fff;border:1px solid var(--line);border-radius:22px;padding:clamp(24px,5vw,48px);box-shadow:var(--shadow)}
.article h1{font-size:clamp(36px,5vw,54px);line-height:1.05;letter-spacing:-.04em;margin:.3em 0}
.article h2{font-size:29px;line-height:1.18;margin-top:1.7em;letter-spacing:-.02em}
.article h3{font-size:21px;margin-top:1.5em}
.article p,.article li{font-size:17px}
.article .meta{color:var(--muted);font-size:14px}
.article table{width:100%;border-collapse:collapse;margin:22px 0;display:block;overflow-x:auto}
.article th,.article td{border:1px solid var(--line);padding:12px 13px;text-align:left;min-width:150px}
.article th{background:#f6f5ff}
.breadcrumbs{font-size:13px;color:var(--muted);margin-bottom:18px}.breadcrumbs a{color:var(--muted)}
.toc{padding:18px 20px;margin:24px 0;box-shadow:none}.toc strong{display:block;margin-bottom:8px}
.toc a{display:block;margin:5px 0}
.cta-box{padding:22px;margin:28px 0;background:linear-gradient(135deg,#f5f2ff,#fff);border-color:#d9d2ff}
.cta-box h3{margin-top:0}.cta-box small{display:block;color:var(--muted);margin-top:9px}
.sidebar{position:relative}.sidebar-inner{position:sticky;top:105px;display:grid;gap:16px}
.sidebar-card{padding:20px}.sidebar-card h3{margin-top:0}
.sidebar-card ul{padding-left:18px;margin-bottom:0}
.sidebar-card li{margin:7px 0}
.note{padding:16px 18px;box-shadow:none;background:#fbfbfe;color:#465066}
.disclosure{font-size:13px;color:var(--muted);border-left:3px solid var(--purple);padding-left:12px;margin:18px 0}
.related{display:grid;grid-template-columns:repeat(2,1fr);gap:14px;margin-top:22px}
.related a{display:block;background:#f8f8fd;border:1px solid var(--line);border-radius:12px;padding:14px;text-decoration:none;font-weight:700}
.footer{background:#17152a;color:#d9d8e8;padding:48px 20px 85px}
.footer-inner{max-width:var(--max);margin:auto;display:grid;grid-template-columns:1.2fr repeat(3,1fr);gap:28px}
.footer a{color:#e7e3ff}.footer h4{color:#fff;margin-top:0}
.mobile-sticky{display:none}
.kicker{font-size:14px;color:var(--muted)}
.checks li{margin:8px 0}
.procon{display:grid;grid-template-columns:1fr 1fr;gap:18px}.procon>div{border:1px solid var(--line);border-radius:14px;padding:18px;background:#fafafe}
@media(max-width:900px){
 .navlinks{display:none;position:absolute;top:64px;left:12px;right:12px;background:white;border:1px solid var(--line);border-radius:14px;padding:16px;box-shadow:var(--shadow)}
 .navlinks.open{display:grid}.menu-btn{display:block}.header-cta{display:none}
 .hero{grid-template-columns:1fr;padding-top:42px}.grid{grid-template-columns:1fr 1fr}
 .article-shell{grid-template-columns:1fr}.sidebar{display:none}
 .footer-inner{grid-template-columns:1fr 1fr}
 .mobile-sticky{display:block;position:fixed;left:10px;right:10px;bottom:10px;z-index:100;background:#fff;border:1px solid #cfc7ff;border-radius:14px;padding:8px;box-shadow:0 12px 35px rgba(20,20,45,.24)}
 .mobile-sticky .btn{width:100%}
}
@media(max-width:560px){.grid,.footer-inner,.related,.procon{grid-template-columns:1fr}.article{padding:24px}.hero h1{font-size:44px}}