:root{
  --bg:#f7f8fb;--card:#ffffff;--ink:#172033;--muted:#5f6b7a;--line:#dce2ea;
  --brand:#6b4eff;--brand2:#111827;--accent:#eef0ff;--success:#eaf8f1;
  --radius:18px;--shadow:0 12px 35px rgba(23,32,51,.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;background:var(--bg);color:var(--ink);line-height:1.72}
a{color:#4d3bd7;text-decoration-thickness:1px;text-underline-offset:3px}a:hover{color:#2d2197}
img{max-width:100%}.skip-link{position:absolute;left:-999px;top:0}.skip-link:focus{left:12px;top:12px;background:#fff;padding:10px 14px;z-index:999;border-radius:8px}
.site-header{position:sticky;top:0;z-index:50;background:rgba(255,255,255,.95);backdrop-filter:blur(12px);border-bottom:1px solid var(--line)}
.header-inner{max-width:var(--max);margin:auto;padding:12px 20px;display:flex;align-items:center;gap:20px}
.logo{display:flex;align-items:center;gap:10px;color:var(--brand2);font-weight:850;text-decoration:none;letter-spacing:-.03em;font-size:1.12rem}
.logo-mark{width:34px;height:34px;border-radius:10px;background:linear-gradient(135deg,#6b4eff,#9b8cff);display:grid;place-items:center;color:white;font-weight:900}
.nav{display:flex;gap:18px;margin-left:auto;align-items:center}.nav a{color:var(--ink);text-decoration:none;font-weight:650;font-size:.94rem}.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:999px;padding:11px 17px;font-weight:800;border:0;box-shadow:0 8px 20px rgba(107,78,255,.22)}
.btn:hover{background:#5439f0}.btn.secondary{background:#fff;color:var(--brand)!important;border:1px solid #cfc8ff;box-shadow:none}
.menu-btn{display:none;margin-left:auto;border:1px solid var(--line);background:#fff;border-radius:10px;padding:8px 10px;font-weight:800}
.hero{background:linear-gradient(180deg,#fff 0%,#f2f0ff 100%);border-bottom:1px solid var(--line)}
.hero-inner{max-width:var(--max);margin:auto;padding:70px 20px 58px;display:grid;grid-template-columns:1.25fr .75fr;gap:50px;align-items:center}
.eyebrow{display:inline-block;background:var(--accent);color:#4d3bd7;border-radius:999px;padding:5px 10px;font-size:.79rem;font-weight:800;letter-spacing:.03em;text-transform:uppercase}
h1,h2,h3{line-height:1.16;letter-spacing:-.035em}h1{font-size:clamp(2.35rem,5vw,4.6rem);margin:.35em 0 .25em}h2{font-size:clamp(1.55rem,3vw,2.35rem);margin:1.8em 0 .55em}h3{font-size:1.2rem;margin:1.4em 0 .35em}
.lede{font-size:1.16rem;color:var(--muted);max-width:740px}.hero-card,.card,.sidebar-card,.cta-box{background:var(--card);border:1px solid var(--line);border-radius:var(--radius);box-shadow:var(--shadow)}
.hero-card{padding:25px}.hero-card ul{margin:10px 0 0;padding-left:20px}
.container{max-width:var(--max);margin:auto;padding:34px 20px 70px}.content-grid{display:grid;grid-template-columns:minmax(0,760px) 330px;gap:42px;align-items:start}
.article{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:clamp(22px,4vw,48px);box-shadow:var(--shadow)}
.article h1{font-size:clamp(2.1rem,4vw,3.7rem);margin-top:.15em}.article p{margin:0 0 1.15em}.article ul,.article ol{padding-left:1.3em}.article li{margin:.42em 0}
.breadcrumbs{font-size:.88rem;color:var(--muted);margin-bottom:18px}.breadcrumbs a{color:var(--muted)}
.sidebar{position:sticky;top:88px;display:grid;gap:18px}.sidebar-card{padding:20px}.sidebar-card h2{font-size:1.15rem;margin:0 0 .55em}.sidebar-card p{font-size:.94rem;color:var(--muted)}
.cta-box{padding:24px;margin:30px 0;background:linear-gradient(135deg,#f6f4ff,#fff)}.cta-box h2{margin:.05em 0 .35em;font-size:1.55rem}.cta-box p{margin:0 0 14px}.fine{font-size:.82rem;color:var(--muted)}
.note{background:#fff8e8;border-left:4px solid #f0b429;padding:14px 16px;border-radius:10px;margin:22px 0}.good{background:var(--success);border-left:4px solid #24a36a;padding:14px 16px;border-radius:10px;margin:22px 0}
.toc{border:1px solid var(--line);border-radius:14px;padding:16px 18px;background:#fbfcfe;margin:24px 0}.toc strong{display:block;margin-bottom:6px}.toc a{display:block;margin:3px 0}
.cards{display:grid;grid-template-columns:repeat(3,1fr);gap:18px}.card{padding:22px}.card h3{margin-top:0}.card p{color:var(--muted);font-size:.95rem}.card a.more{font-weight:800;text-decoration:none}
.section{padding:26px 0}.section h2{margin-top:.3em}.pill{display:inline-block;padding:5px 9px;background:#eef0f4;border-radius:999px;font-size:.77rem;font-weight:700;color:#4c5668}
.footer{background:#111827;color:#dbe2ee}.footer a{color:#fff}.footer-inner{max-width:var(--max);margin:auto;padding:44px 20px;display:grid;grid-template-columns:2fr 1fr 1fr;gap:30px}.footer h2,.footer h3{color:#fff;margin-top:0}.footer p{color:#aeb8c8}.copyright{max-width:var(--max);margin:auto;padding:18px 20px;border-top:1px solid #2b3545;color:#9aa6b7;font-size:.85rem}
.article-meta{display:flex;gap:12px;flex-wrap:wrap;color:var(--muted);font-size:.86rem;margin-bottom:20px}
.related{border-top:1px solid var(--line);margin-top:32px;padding-top:22px}.related ul{display:grid;grid-template-columns:1fr 1fr;gap:8px 22px}
table{width:100%;border-collapse:collapse;margin:20px 0;font-size:.94rem}th,td{border:1px solid var(--line);padding:11px;text-align:left;vertical-align:top}th{background:#f5f6fa}
@media(max-width:900px){.hero-inner,.content-grid{grid-template-columns:1fr}.cards{grid-template-columns:1fr 1fr}.sidebar{position:static}.nav{display:none;position:absolute;left:0;right:0;top:59px;background:#fff;border-bottom:1px solid var(--line);padding:15px 20px;flex-direction:column;align-items:flex-start}.nav.open{display:flex}.menu-btn{display:block}.header-cta{display:none}.hero-inner{padding-top:45px}.footer-inner{grid-template-columns:1fr 1fr}}
@media(max-width:600px){.cards{grid-template-columns:1fr}.article{padding:22px}.footer-inner{grid-template-columns:1fr}.related ul{grid-template-columns:1fr}}