:root {
  color-scheme: dark;
  --bg: #0a0f1e;
  --panel: #121a30;
  --panel-deep: #0e1730;
  --line: #223055;
  --ink: #f2f5fc;
  --dim: #93a0bf;
  --faint: #6b7899;
  --brand: #ff6b4a;
  --brand-ink: #ffd9cf;
  --go: #35d68a;
  --max: 1120px;
}
* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0; min-width: 320px; background: var(--bg); color: var(--ink);
  font-family: -apple-system, "Apple SD Gothic Neo", "Malgun Gothic", system-ui, sans-serif;
  font-size: 16px; line-height: 1.7; letter-spacing: -0.01em;
}
a { color: inherit; text-decoration: none; }
a:focus-visible, button:focus-visible, summary:focus-visible { outline: 3px solid #ffb09d; outline-offset: 3px; }
.skip { position: absolute; left: -999px; top: 8px; z-index: 10; background: var(--ink); color: var(--bg); padding: 8px 12px; border-radius: 8px; }
.skip:focus { left: 12px; }
.site-head { position: sticky; top: 0; z-index: 5; background: rgba(10,15,30,.94); border-bottom: 1px solid rgba(34,48,85,.84); backdrop-filter: blur(14px); }
.bar { width: min(var(--max), calc(100% - 40px)); min-height: 70px; margin: auto; display: flex; align-items: center; gap: 22px; }
.mark { display: flex; align-items: center; gap: 9px; white-space: nowrap; font-size: 15px; font-weight: 850; letter-spacing: -.02em; }
.mark span { color: var(--brand); }
.mark svg { width: 30px; height: 30px; flex: none; }
.nav { display: flex; align-items: center; justify-content: flex-end; gap: 3px; flex: 1; }
.nav a { color: var(--dim); padding: 8px 10px; border-radius: 8px; font-size: 14px; font-weight: 700; }
.nav a:hover, .nav a[aria-current="page"] { color: var(--ink); background: #182441; }
.nav .nav-cta { color: #2a0d05; background: var(--brand); }
.nav .nav-cta:hover { background: #ff8369; color: #2a0d05; }
.menu-toggle { display: none; }
main { overflow: hidden; }
.frame { width: min(var(--max), calc(100% - 40px)); margin: 0 auto; }
.hero { padding: clamp(64px, 10vw, 124px) 0 74px; position: relative; }
.hero:before { content: ""; position: absolute; width: min(600px, 90vw); height: 600px; border-radius: 50%; right: -270px; top: -290px; background: radial-gradient(circle, rgba(255,107,74,.16), transparent 67%); pointer-events: none; }
.eyebrow { color: var(--brand); font-size: 13px; font-weight: 800; letter-spacing: .11em; text-transform: uppercase; }
h1, h2, h3, p { margin-top: 0; }
h1 { max-width: 830px; margin-bottom: 22px; font-size: clamp(38px, 6.2vw, 76px); line-height: 1.13; letter-spacing: -.055em; }
h1 strong { color: var(--brand-ink); }
h2 { font-size: clamp(28px, 3.5vw, 45px); line-height: 1.22; letter-spacing: -.045em; }
h3 { font-size: 19px; line-height: 1.35; letter-spacing: -.025em; }
.lead { max-width: 680px; color: var(--dim); font-size: clamp(17px, 2.2vw, 21px); line-height: 1.65; }
.hero-actions { display: flex; flex-wrap: wrap; align-items: center; gap: 12px; margin-top: 34px; }
.button { display: inline-flex; align-items: center; justify-content: center; min-height: 52px; padding: 13px 20px; border: 1px solid transparent; border-radius: 11px; font: inherit; font-size: 16px; font-weight: 800; cursor: pointer; }
.button.primary { background: var(--brand); color: #2a0d05; }
.button.primary:hover { background: #ff8369; }
.button.secondary { border-color: #324267; color: var(--ink); background: #121b33; }
.button.secondary:hover { background: #192744; }
.cta-note { color: var(--faint); font-size: 14px; }
.signal-line { margin-top: clamp(54px, 8vw, 96px); padding: 17px 20px; border: 1px solid #2a3a66; border-radius: 15px; background: linear-gradient(100deg, #101a32, #111a2e); display: grid; grid-template-columns: repeat(5, 1fr); gap: 10px; }
.signal-line div { color: var(--dim); text-align: center; font-size: 13px; font-weight: 750; }
.signal-line div:not(:last-child)::after { content: "→"; color: var(--brand); float: right; transform: translateX(8px); }
.signal-line b { display: block; color: var(--ink); font-size: 14px; }
.band { padding: clamp(58px, 9vw, 106px) 0; border-top: 1px solid var(--line); }
.band.deep { background: #0d1529; }
.section-head { display: grid; grid-template-columns: minmax(0, 1fr) minmax(240px, .72fr); gap: 44px; align-items: end; margin-bottom: 34px; }
.section-head p { margin: 0; color: var(--dim); font-size: 17px; }
.facts, .cards { display: grid; gap: 14px; }
.facts { grid-template-columns: repeat(4, 1fr); }
.fact { background: var(--panel); border: 1px solid var(--line); border-radius: 14px; padding: 21px; }
.fact b { display: block; color: var(--brand-ink); font-size: clamp(27px, 3.5vw, 41px); line-height: 1; letter-spacing: -.05em; font-variant-numeric: tabular-nums; }
.fact span { display: block; margin-top: 10px; color: var(--dim); font-size: 14px; line-height: 1.45; }
.cards.four { grid-template-columns: repeat(4, 1fr); }
.cards.three { grid-template-columns: repeat(3, 1fr); }
.card { padding: 24px; border: 1px solid var(--line); border-radius: 15px; background: var(--panel); }
.card p { margin: 0; color: var(--dim); }
.card .num { display: block; margin-bottom: 16px; color: var(--brand); font-size: 13px; font-weight: 850; letter-spacing: .08em; }
.note { margin-top: 20px; color: var(--faint); font-size: 14px; }
.route { display: grid; grid-template-columns: 1fr 46px 1fr 46px 1fr; gap: 0; align-items: center; max-width: 900px; margin: 40px auto; }
.route .node { min-height: 174px; padding: 24px; display: flex; flex-direction: column; justify-content: center; border: 1px solid #31436f; border-radius: 15px; background: #101a31; }
.route .node strong { color: var(--brand-ink); font-size: 22px; }
.route .node small { color: var(--dim); margin-top: 8px; }
.route .arrow { color: var(--brand); font-size: 30px; text-align: center; }
.prose { max-width: 770px; }
.prose p, .prose li { color: var(--dim); }
.prose strong { color: var(--ink); }
.prose ul { padding-left: 1.3em; }
.limit { border-left: 4px solid var(--brand); padding: 6px 0 6px 20px; color: var(--dim); }
.limit strong { color: var(--ink); }
.table-wrap { overflow-x: auto; border: 1px solid var(--line); border-radius: 14px; }
table { width: 100%; border-collapse: collapse; min-width: 600px; }
th, td { padding: 16px; text-align: left; vertical-align: top; border-bottom: 1px solid var(--line); }
th { color: var(--ink); background: #111b34; font-size: 14px; }
td { color: var(--dim); font-size: 15px; }
tr:last-child td { border-bottom: 0; }
details { border: 1px solid var(--line); border-radius: 12px; background: var(--panel); }
details + details { margin-top: 10px; }
summary { cursor: pointer; padding: 16px 18px; color: var(--ink); font-weight: 800; list-style: none; }
summary::-webkit-details-marker { display: none; }
summary::after { content: "+"; float: right; color: var(--brand); font-size: 20px; }
details[open] summary::after { content: "−"; }
details > div { padding: 0 18px 18px; color: var(--dim); }
.page-hero { padding: 68px 0 58px; border-bottom: 1px solid var(--line); }
.page-hero h1 { max-width: 720px; font-size: clamp(35px, 5vw, 60px); }
.page-hero .lead { max-width: 710px; }
.callout { padding: 30px; border: 1px solid #3a4266; border-radius: 16px; background: linear-gradient(120deg, #151b31, #101a2d); }
.callout h2 { margin-bottom: 10px; font-size: clamp(25px, 3vw, 34px); }
.callout p { margin: 0; color: var(--dim); }
.footer { padding: 48px 0 60px; border-top: 1px solid var(--line); color: var(--faint); font-size: 14px; }
.footer-grid { display: grid; grid-template-columns: 1.3fr 1fr 1fr; gap: 30px; }
.footer a { display: block; margin: 5px 0; color: var(--dim); }
.footer a:hover { color: var(--ink); }
.footer p { max-width: 380px; margin: 10px 0 0; }
.copyright { margin-top: 34px; font-size: 12px; }
@media (max-width: 760px) {
  body { font-size: 16px; }
  .bar, .frame { width: min(100% - 28px, var(--max)); }
  .bar { min-height: 62px; gap: 10px; }
  .menu-toggle { display: block; margin-left: auto; padding: 8px; border: 1px solid #344468; border-radius: 8px; color: var(--ink); background: #121b33; font: inherit; font-size: 14px; font-weight: 750; }
  .nav { display: none; position: absolute; top: 62px; left: 0; right: 0; padding: 10px 14px 15px; border-bottom: 1px solid var(--line); background: #10182c; flex-wrap: wrap; justify-content: flex-start; }
  .nav.open { display: flex; }
  .nav a { padding: 9px 10px; }
  .hero { padding-top: 62px; }
  h1 { font-size: clamp(38px, 11vw, 54px); }
  .signal-line { grid-template-columns: 1fr; gap: 13px; padding: 18px; }
  .signal-line div { display: flex; align-items: center; gap: 8px; text-align: left; }
  .signal-line b { display: inline; }
  .signal-line div:not(:last-child)::after { content: "↓"; float: none; transform: none; margin-left: auto; }
  .section-head { grid-template-columns: 1fr; gap: 8px; }
  .facts, .cards.four, .cards.three { grid-template-columns: 1fr 1fr; }
  .route { grid-template-columns: 1fr; gap: 12px; margin: 26px auto; }
  .route .arrow { transform: rotate(90deg); height: 28px; }
  .route .node { min-height: 0; }
  .footer-grid { grid-template-columns: 1fr; gap: 18px; }
}
@media (max-width: 460px) {
  .facts, .cards.four, .cards.three { grid-template-columns: 1fr; }
  .hero-actions .button { width: 100%; }
  .page-hero { padding-top: 48px; }
}
@media (prefers-reduced-motion: reduce) { html { scroll-behavior: auto; } }