:root {
  --bg:#f4f7fb;
  --paper:#fff;
  --paper2:#f8fbff;
  --ink:#111827;
  --muted:#607086;
  --line:#dbe5f2;
  --line2:#c7d4e5;
  --blue:#2451e6;
  --blue2:#1c3fb5;
  --dark:#10264a;
  --soft:#eef4ff;
  --green:#0f766e;
  --amber:#a16207;
  --radius:24px;
  --shadow:0 20px 54px rgba(15,23,42,.075);
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{
  margin:0;
  font-family:Arial,Helvetica,sans-serif;
  color:var(--ink);
  background:
    radial-gradient(circle at 12% 0%,rgba(36,81,230,.08),transparent 30%),
    linear-gradient(180deg,#fff 0%,var(--bg) 38%,var(--bg) 100%);
  line-height:1.64;
  font-size:17px;
}
a{color:inherit}
.wrap{width:min(1180px,calc(100% - 40px));margin:0 auto}
.topbar{
  position:sticky;top:0;z-index:50;
  background:rgba(255,255,255,.93);
  backdrop-filter:blur(12px);
  border-bottom:1px solid var(--line);
}
.nav{min-height:74px;display:flex;align-items:center;justify-content:space-between;gap:24px}
.logo{text-decoration:none;font-size:29px;font-weight:800;letter-spacing:-.04em;color:#10223f;white-space:nowrap}
.logo span{color:var(--blue)}
.links{display:flex;align-items:center;gap:18px;flex-wrap:wrap;font-size:14px;font-weight:700}
.links a{color:#26364d;text-decoration:none}
.links a:hover,.links a[aria-current="page"]{color:var(--blue)}
.access{padding:10px 17px;border-radius:999px;background:var(--blue);color:#fff!important;box-shadow:0 12px 24px rgba(36,81,230,.16)}
.breadcrumb{padding:22px 0 0;color:var(--muted);font-size:14px}
.breadcrumb a{text-decoration:none;color:var(--muted)}
.hero{padding:18px 0 42px}
.heroBox{
  display:grid;
  grid-template-columns:minmax(0,1fr) 360px;
  gap:24px;
  padding:40px;
  background:rgba(255,255,255,.94);
  border:1px solid var(--line);
  border-radius:32px;
  box-shadow:var(--shadow);
}
.eyebrow{
  display:inline-flex;align-items:center;
  padding:8px 14px;margin-bottom:18px;
  border-radius:999px;background:var(--soft);color:#17356d;
  font-size:13px;font-weight:800;text-transform:uppercase;letter-spacing:.045em;
}
h1{margin:0;max-width:820px;font-size:clamp(38px,5vw,58px);line-height:1.05;letter-spacing:-.055em}
.lead{max-width:820px;margin:22px 0 0;color:var(--muted);font-size:20px}
.heroActions{display:flex;flex-wrap:wrap;gap:12px;margin-top:28px}
.btn{display:inline-flex;min-height:48px;align-items:center;justify-content:center;padding:0 20px;border-radius:14px;font-weight:800;text-decoration:none;border:1px solid transparent}
.btnBlue{color:#fff;background:var(--blue)}
.btnWhite{color:#1e293b;background:#fff;border-color:var(--line2)}
.heroCard{background:#10264a;border-radius:24px;color:#fff;padding:24px;display:flex;flex-direction:column;justify-content:space-between;min-height:300px}
.heroCard h2{margin:0 0 12px;font-size:22px;line-height:1.2}
.heroCard p{margin:0;color:rgba(255,255,255,.78);font-size:15px}
.miniGrid{display:grid;grid-template-columns:repeat(2,1fr);gap:10px;margin-top:28px}
.mini{padding:12px;border-radius:16px;background:rgba(255,255,255,.09);border:1px solid rgba(255,255,255,.18);font-size:13px;font-weight:800}
.layout{display:grid;grid-template-columns:minmax(0,1fr) 290px;gap:30px;align-items:start;padding:8px 0 56px}
article{min-width:0}
.content{background:var(--paper);border:1px solid var(--line);border-radius:var(--radius);box-shadow:0 12px 32px rgba(15,23,42,.045);padding:34px}
.content h2{margin:38px 0 14px;font-size:30px;line-height:1.18;letter-spacing:-.035em}
.content h2:first-child{margin-top:0}
.content h3{margin:24px 0 10px;font-size:21px;line-height:1.25;letter-spacing:-.02em}
.content p{margin:0 0 17px;color:#243348}
.content ul,.content ol{margin:0 0 20px;padding-left:24px;color:#243348}
.content li{margin:7px 0}
.note{margin:26px 0;padding:22px;border:1px solid rgba(36,81,230,.18);border-radius:22px;background:linear-gradient(135deg,rgba(36,81,230,.06),#fff)}
.note b{display:block;margin-bottom:7px;color:var(--blue2)}
.warning{border-color:rgba(161,98,7,.25);background:linear-gradient(135deg,rgba(161,98,7,.07),#fff)}
.warning b{color:#7c4a03}
.figure{margin:28px 0;padding:16px;border:1px solid var(--line);border-radius:24px;background:#fff}
.figure img{display:block;width:100%;height:auto;border-radius:16px;background:#fff}
.figure figcaption{margin-top:12px;color:var(--muted);font-size:14px}
.figurePair{display:grid;grid-template-columns:1fr 1fr;gap:14px;margin:28px 0}
.figurePair .figure{margin:0}
.formulaGrid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:12px;margin:22px 0}
.formula{padding:16px;border:1px solid var(--line);border-radius:18px;background:var(--paper2)}
.formula code{display:block;margin-bottom:6px;font-family:Consolas,Monaco,monospace;font-size:16px;color:#0f2c67;font-weight:800;white-space:normal}
.formula span{color:var(--muted);font-size:14px}
table{width:100%;border-collapse:separate;border-spacing:0;margin:22px 0 28px;border:1px solid var(--line);border-radius:20px;overflow:hidden;background:#fff;font-size:15px}
th,td{padding:14px 15px;border-bottom:1px solid var(--line);text-align:left;vertical-align:top}
th{background:#eef4ff;color:#13264a;font-weight:800}
tr:last-child td{border-bottom:0}
.scenario{display:grid;grid-template-columns:170px 1fr;gap:14px;padding:18px;border:1px solid var(--line);border-radius:20px;background:var(--paper2);margin:12px 0}
.scenario b{color:#13264a}
.scenario span{color:var(--muted)}
.cta{margin:36px 0;padding:28px;border-radius:26px;background:linear-gradient(135deg,rgba(16,38,74,.98),rgba(36,81,230,.92)),#10264a;color:#fff;overflow:hidden}
.cta h2{margin:0 0 10px;color:#fff}
.cta p{color:rgba(255,255,255,.8);max-width:760px}
.cta .btn{background:#fff;color:#10264a;margin-top:4px}
.sources{margin-top:42px;padding-top:26px;border-top:1px solid var(--line)}
.sources ol{font-size:14px;color:#405066}
.toc{position:sticky;top:96px;background:var(--paper);border:1px solid var(--line);border-radius:22px;padding:20px;box-shadow:0 12px 32px rgba(15,23,42,.045)}
.toc b{display:block;margin-bottom:12px;font-size:14px;text-transform:uppercase;letter-spacing:.05em;color:#14213a}
.toc a{display:block;padding:8px 0;color:#526178;text-decoration:none;font-size:14px;border-bottom:1px solid #eef2f8}
.toc a:hover{color:var(--blue)}
.tocCta{margin-top:16px;padding:16px;border-radius:18px;background:var(--soft);font-size:14px;color:#17356d}
.tocCta a{margin-top:8px;border:0;color:var(--blue);font-weight:800}
.footer{padding:34px 0 52px;border-top:1px solid var(--line);color:var(--muted);font-size:14px}
.footerFlex{display:flex;justify-content:space-between;gap:24px;flex-wrap:wrap}
.footer a{margin-left:16px;color:var(--muted);text-decoration:none}
.footer a:hover{color:var(--blue)}
@media (max-width:960px){
  .heroBox,.layout{grid-template-columns:1fr}
  .toc{position:static}
}
@media (max-width:680px){
  .wrap{width:min(100% - 28px,1180px)}
  .nav{align-items:flex-start;flex-direction:column;padding:16px 0}
  .heroBox,.content{padding:24px}
  .formulaGrid,.miniGrid,.figurePair{grid-template-columns:1fr}
  .scenario{grid-template-columns:1fr}
}