:root {
  color-scheme: dark;
  --brand: #50f5e1;
  --brand-foreground: #101828;
  --brand-deep: #71eadc;
  --brand-tint: rgba(80, 245, 225, 0.07);
  --brand-border: rgba(80, 245, 225, 0.25);
  --brand-shadow: rgba(80, 245, 225, 0.30);
  --brand-glow: rgba(80, 245, 225, 0.12);
  --ink: #edf5f5;
  --muted: #a1b4be;
  --line: #20343e;
  --surface: #0c1821;
  --card: #0f1e27;
  --radius: 24px;
  font-family: -apple-system, BlinkMacSystemFont, "SF Pro Text", "PingFang SC", "Helvetica Neue", Arial, sans-serif;
}

* { box-sizing: border-box; }

html { background: #071017; }

body {
  margin: 0;
  color: var(--ink);
  background:
    radial-gradient(circle at 85% 0%, var(--brand-glow), transparent 34rem),
    #071017;
  line-height: 1.65;
}

a { color: var(--brand-deep); text-underline-offset: 0.2em; }

.site-header,
main,
footer {
  width: min(1120px, calc(100% - 40px));
  margin-inline: auto;
}

.site-header {
  min-height: 76px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  border-bottom: 1px solid var(--line);
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  color: var(--ink);
  font-weight: 760;
  text-decoration: none;
}

.brand-mark {
  width: 34px;
  height: 34px;
  display: grid;
  place-items: center;
  border-radius: 11px;
  color: var(--brand-foreground);
  background: var(--brand);
  box-shadow: 0 8px 24px var(--brand-shadow);
}

nav { display: flex; gap: 22px; }
nav a { color: var(--muted); font-weight: 620; text-decoration: none; }
nav a:hover,
nav a[aria-current="page"] { color: var(--brand-deep); }

.hero,
.page-intro { padding: clamp(72px, 10vw, 132px) 0 clamp(58px, 8vw, 96px); }

.hero { max-width: 850px; }
.narrow { width: min(780px, calc(100% - 40px)); }

h1,
h2,
h3,
p { margin-top: 0; }

h1 {
  max-width: 100%;
  margin-bottom: 24px;
  font-size: clamp(2.65rem, 7vw, 5.7rem);
  line-height: 1.03;
  letter-spacing: -0.045em;
  text-wrap: balance;
}

.page-intro h1 { font-size: clamp(2.5rem, 6vw, 4.6rem); }

h2 {
  margin-bottom: 20px;
  font-size: clamp(1.7rem, 4vw, 2.5rem);
  line-height: 1.18;
  letter-spacing: -0.025em;
}

h3 { margin-bottom: 8px; font-size: 1.18rem; }

.eyebrow {
  margin-bottom: 14px;
  color: var(--brand-deep);
  font-size: 0.78rem;
  font-weight: 780;
  letter-spacing: 0.14em;
  text-transform: uppercase;
}

.lede {
  max-width: 66ch;
  margin-bottom: 28px;
  color: var(--muted);
  font-size: clamp(1.08rem, 2vw, 1.3rem);
}

.badges,
.actions { display: flex; flex-wrap: wrap; gap: 10px; }
.actions { margin-top: 28px; }

.badge {
  padding: 7px 12px;
  border: 1px solid var(--brand-border);
  border-radius: 999px;
  color: var(--brand-deep);
  background: var(--brand-tint);
  font-size: 0.92rem;
  font-weight: 650;
}

.button {
  min-height: 46px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 10px 18px;
  border-radius: 14px;
  font-weight: 700;
  text-decoration: none;
}

.button.primary { color: var(--brand-foreground); background: var(--brand); }
.button.secondary { color: var(--ink); border: 1px solid var(--line); background: #0c1923; }

.section { padding: clamp(54px, 7vw, 82px) 0; border-top: 1px solid var(--line); }

.feature-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 18px;
}

.feature-card,
.contact-card,
.notice,
.faq-list details,
.policy section {
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--card);
  box-shadow: 0 16px 48px rgba(20, 35, 60, 0.06);
}

.feature-card { padding: 26px; }
.feature-card p,
.contact-card p,
.notice p,
.policy p { color: var(--muted); }

.contact-card {
  margin-top: 58px;
  padding: clamp(28px, 5vw, 48px);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 30px;
}

.contact-card h2,
.contact-card p { margin-bottom: 6px; }

.faq-list { display: grid; gap: 12px; }
.faq-list details { padding: 19px 22px; }
.faq-list summary { cursor: pointer; font-weight: 720; }
.faq-list p { margin: 12px 0 0; color: var(--muted); }

.policy { display: grid; gap: 18px; }
.policy section { padding: clamp(24px, 4vw, 34px); }
.policy section h2 { font-size: 1.35rem; }
.policy section p:last-child { margin-bottom: 0; }

.notice { padding: clamp(24px, 4vw, 34px); }
.notice h2 { font-size: 1.35rem; }
.notice p:last-child { margin-bottom: 0; }
.updated { color: var(--muted); font-size: 0.92rem; }

footer {
  min-height: 104px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 18px;
  border-top: 1px solid var(--line);
  color: var(--muted);
  font-size: 0.92rem;
}

@media (max-width: 760px) {
  .site-header { align-items: flex-start; padding: 20px 0; }
  nav { gap: 14px; font-size: 0.92rem; }
  .feature-grid { grid-template-columns: 1fr; }
  .contact-card { align-items: flex-start; flex-direction: column; }
  .contact-card .button { width: 100%; overflow-wrap: anywhere; }
  footer { align-items: flex-start; flex-direction: column; justify-content: center; padding: 24px 0; }
}

@media (max-width: 470px) {
  .site-header,
  main,
  footer,
  .narrow { width: min(100% - 28px, 1120px); }
  .site-header { flex-direction: column; gap: 10px; }
  .hero,
  .page-intro { padding-top: 54px; }
  h1 { font-size: clamp(2.35rem, 14vw, 3.65rem); }
  .actions .button { width: 100%; }
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { scroll-behavior: auto !important; }
}

.hero { position: relative; isolation: isolate; overflow: hidden; }
.hero::after { content: ""; pointer-events: none; position: absolute; z-index: -1; right: -25vw; top: 40px; width: min(75vw, 760px); aspect-ratio: 1; border: 1px solid #50f5e116; border-radius: 50%; background: repeating-radial-gradient(circle, transparent 0 57px, #50f5e116 58px 59px, transparent 60px 97px); opacity: .65; }
body { overflow-x: hidden; }
h1 { line-height: 1.15; letter-spacing: -.035em; }
.brand-mark { border-radius: 10px; font-weight: 400; }
.feature-card:nth-child(2) { border-color: #ffd17c33; }
.feature-card:nth-child(3) { border-color: #b9a0fa33; }
@media (prefers-reduced-motion: reduce) { * { scroll-behavior: auto !important; } }

.hero h1 span { display: block; }
.hero h1 { font-size: clamp(2.15rem, 6.7vw, 5rem); line-height: 1.18; }