:root{
  --bg:#f7f8fb;--ink:#172033;--muted:#5d6677;--card:#ffffff;--line:#e5e8ef;
  --accent:#7a3cff;--accent2:#5f22de;--soft:#f0eaff;--good:#1f7a4c;--warn:#8a5a00;
  --max:1180px;--radius:18px
}
*{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:1.65}
a{color:var(--accent2);text-decoration-thickness:1px;text-underline-offset:2px}img{max-width:100%}
.wrap{width:min(var(--max),92vw);margin:auto}.site-header{position:sticky;top:0;z-index:40;background:rgba(255,255,255,.96);border-bottom:1px solid var(--line);backdrop-filter:blur(10px)}
.nav{display:flex;align-items:center;justify-content:space-between;gap:20px;min-height:70px}.brand{display:flex;align-items:center;gap:10px;font-weight:850;color:var(--ink);text-decoration:none;font-size:1.18rem}
.brand-mark{width:34px;height:34px;border-radius:11px;background:linear-gradient(135deg,var(--accent),#a684ff);display:grid;place-items:center;color:white;font-weight:900}
.nav-links{display:flex;gap:20px;align-items:center}.nav-links a{text-decoration:none;color:var(--ink);font-weight:650;font-size:.94rem}
.menu-btn{display:none;border:1px solid var(--line);background:white;border-radius:10px;padding:9px 12px}
.hero{padding:64px 0 40px;background:linear-gradient(180deg,#fff 0%,#f7f8fb 100%)}.hero-grid{display:grid;grid-template-columns:minmax(0,1fr) 360px;gap:40px;align-items:center}
.kicker{display:inline-flex;gap:8px;align-items:center;background:var(--soft);color:var(--accent2);padding:6px 11px;border-radius:999px;font-weight:750;font-size:.84rem}
h1{font-size:clamp(2.25rem,5vw,4.4rem);line-height:1.02;letter-spacing:-.045em;margin:.5em 0 .28em}h2{font-size:clamp(1.5rem,2.4vw,2.25rem);line-height:1.18;letter-spacing:-.025em;margin:1.7em 0 .45em}h3{font-size:1.2rem;margin:1.35em 0 .35em}.lead{font-size:1.15rem;color:var(--muted);max-width:760px}
.cta-row{display:flex;flex-wrap:wrap;gap:12px;margin:24px 0}.btn{display:inline-flex;justify-content:center;align-items:center;gap:8px;padding:13px 18px;border-radius:12px;text-decoration:none;font-weight:800;border:1px solid transparent}
.btn-primary{background:var(--accent);color:white}.btn-primary:hover{background:var(--accent2)}.btn-ghost{border-color:var(--line);background:white;color:var(--ink)}
.disclosure{font-size:.82rem;color:var(--muted);margin-top:9px}.hero-card,.card,.sidebar-card,.callout,.faq-item,.cluster-card{background:var(--card);border:1px solid var(--line);border-radius:var(--radius);box-shadow:0 8px 30px rgba(27,35,58,.05)}
.hero-card{padding:24px}.hero-card strong{display:block;font-size:1.1rem}.checklist{padding:0;list-style:none}.checklist li{padding:7px 0 7px 28px;position:relative}.checklist li:before{content:"✓";position:absolute;left:0;color:var(--good);font-weight:900}
.content-shell{display:grid;grid-template-columns:minmax(0,1fr) 320px;gap:38px;align-items:start;padding:38px 0 70px}.article{background:white;border:1px solid var(--line);border-radius:22px;padding:clamp(22px,4vw,48px)}
.article p{margin:.7em 0 1.15em}.article ul,.article ol{padding-left:1.25rem}.article li{margin:.35em 0}.article table{width:100%;border-collapse:collapse;margin:22px 0;display:block;overflow:auto}.article th,.article td{border:1px solid var(--line);padding:11px;text-align:left;min-width:145px}.article th{background:#f7f7fb}
.breadcrumbs{font-size:.84rem;color:var(--muted);margin-bottom:18px}.breadcrumbs a{color:var(--muted)}
.sidebar-card{padding:20px;position:sticky;top:92px}.sidebar-card h3{margin-top:0}.sidebar-card .btn{width:100%;margin-top:8px}
.callout{padding:18px 20px;margin:22px 0;border-left:5px solid var(--accent)}.callout strong{display:block;margin-bottom:3px}.warning{border-left-color:#d28b00;background:#fffaf0}
.inline-cta{background:linear-gradient(135deg,#21123f,#4c238f);color:white;border-radius:18px;padding:22px;margin:28px 0}.inline-cta a{color:white}.inline-cta .btn{background:white;color:#2b1650}
.grid{display:grid;grid-template-columns:repeat(3,1fr);gap:18px}.cluster-card{padding:20px}.cluster-card h3{margin-top:0}.cluster-card p{color:var(--muted)}
.related{margin-top:38px;padding-top:24px;border-top:1px solid var(--line)}.related-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:12px}.related a{display:block;background:#fafafe;border:1px solid var(--line);padding:12px 14px;border-radius:12px;text-decoration:none;color:var(--ink);font-weight:650}
.faq-item{padding:16px 18px;margin:12px 0}.faq-item h3{margin:0 0 6px}.site-footer{background:#121827;color:#dbe0ec;padding:45px 0}.site-footer a{color:#fff}.footer-grid{display:grid;grid-template-columns:1.3fr 1fr 1fr;gap:30px}.small{font-size:.86rem;color:#aeb6c8}
.popup-backdrop{position:fixed;inset:0;display:none;z-index:100;background:rgba(8,12,22,.68);padding:20px;align-items:center;justify-content:center}.popup-backdrop.open{display:flex}.popup{width:min(720px,96vw);max-height:90vh;overflow:auto;background:white;border-radius:24px;padding:30px;position:relative;box-shadow:0 30px 80px rgba(0,0,0,.35)}.popup-close{position:absolute;top:12px;right:12px;border:0;background:#f1f2f6;width:38px;height:38px;border-radius:50%;font-size:1.2rem}.popup h2{margin-top:0}.popup-badge{display:inline-block;background:var(--soft);color:var(--accent2);padding:5px 10px;border-radius:999px;font-weight:800;font-size:.8rem}
.top-strip{background:#241545;color:white;text-align:center;padding:8px 12px;font-size:.88rem}.top-strip a{color:white;font-weight:800}
@media(max-width:900px){.hero-grid,.content-shell,.footer-grid{grid-template-columns:1fr}.sidebar-card{position:static;order:2}.grid{grid-template-columns:1fr 1fr}.nav-links{display:none;position:absolute;top:70px;left:0;right:0;background:white;border-bottom:1px solid var(--line);padding:14px 4vw;flex-direction:column;align-items:flex-start}.nav-links.open{display:flex}.menu-btn{display:block}}
@media(max-width:620px){.hero{padding-top:38px}.grid,.related-grid{grid-template-columns:1fr}.article{border-radius:0;border-left:0;border-right:0;padding:22px 5vw}.content-shell{width:100%;gap:18px}.sidebar-card{margin:0 4vw}.popup{padding:22px}.top-strip{font-size:.78rem}}

.nav-cta{display:inline-flex;align-items:center;justify-content:center;background:var(--accent);color:#fff!important;text-decoration:none!important;padding:10px 14px;border-radius:11px;font-weight:800;white-space:nowrap}
.nav-cta:hover{background:var(--accent2)}
@media(max-width:900px){
  .nav-links .nav-cta{width:100%;margin-top:4px}
}