:root {
  color-scheme: dark;
  --bg: #030712;
  --panel: rgba(13, 24, 49, 0.76);
  --panel-strong: rgba(18, 36, 75, 0.9);
  --line: rgba(139, 207, 255, 0.22);
  --text: #f4f9ff;
  --muted: #a7b9ca;
  --brand: #54e5ff;
  --brand-2: #9c8cff;
  --gold: #ffd166;
  --green: #7cf2b0;
  --danger: #ff8aa1;
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "PingFang SC", "Microsoft YaHei", sans-serif;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  color: var(--text);
  background:
    radial-gradient(circle at 18% 0%, rgba(84, 229, 255, .16), transparent 34rem),
    radial-gradient(circle at 88% 6%, rgba(156, 140, 255, .16), transparent 30rem),
    linear-gradient(180deg, #030712 0%, #071125 50%, #030712 100%);
}
a { color: inherit; text-decoration: none; }
.site-header {
  position: sticky;
  top: 0;
  z-index: 10;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  padding: 18px clamp(18px, 5vw, 72px);
  background: rgba(3, 7, 18, .84);
  border-bottom: 1px solid var(--line);
  backdrop-filter: blur(18px);
}
.brand { display: inline-flex; align-items: center; gap: 12px; font-weight: 900; letter-spacing: .13em; }
.brand-dot {
  width: 36px;
  height: 36px;
  border-radius: 50%;
  background: radial-gradient(circle at 35% 25%, #fff, #67eaff 28%, #1f3b7a 68%, #020611);
  box-shadow: 0 0 34px rgba(84,229,255,.45);
}
nav { display: flex; flex-wrap: wrap; gap: 18px; color: var(--muted); font-size: 14px; }
nav a:hover { color: var(--text); }
main { width: min(1120px, calc(100% - 32px)); margin: 0 auto; }
.hero {
  display: grid;
  grid-template-columns: minmax(0, 1.15fr) minmax(280px, .85fr);
  gap: 32px;
  align-items: center;
  padding: 76px 0 54px;
}
.eyebrow {
  margin: 0 0 14px;
  color: var(--brand);
  font-size: 13px;
  font-weight: 900;
  letter-spacing: .18em;
  text-transform: uppercase;
}
h1, h2, h3 { margin: 0; line-height: 1.08; }
h1 { max-width: 840px; font-size: clamp(42px, 7vw, 84px); letter-spacing: -.06em; }
h2 { font-size: clamp(30px, 4.5vw, 52px); letter-spacing: -.04em; }
h3 { font-size: 24px; }
p { color: var(--muted); line-height: 1.85; }
.lead { max-width: 780px; font-size: 18px; }
.panel, .card, .callout {
  border: 1px solid var(--line);
  border-radius: 26px;
  background: linear-gradient(145deg, var(--panel), rgba(5, 12, 28, .72));
  box-shadow: 0 24px 70px rgba(0,0,0,.26);
}
.hero-card { min-height: 300px; padding: 30px; }
.hero-card strong { display: block; margin: 48px 0 8px; font-size: 36px; letter-spacing: -.04em; }
.orb {
  width: 72px;
  height: 72px;
  border-radius: 50%;
  background: radial-gradient(circle at 35% 25%, #fff, var(--brand) 28%, #1f3b7a 68%, #020611);
  box-shadow: 0 0 54px rgba(84,229,255,.42);
}
.section { padding: 58px 0; border-top: 1px solid rgba(139,207,255,.12); }
.grid { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 18px; margin-top: 26px; }
.grid.two { grid-template-columns: repeat(2, minmax(0, 1fr)); }
.card { padding: 24px; }
.card .num, .tag {
  display: inline-flex;
  margin-bottom: 14px;
  color: var(--brand);
  font-size: 12px;
  font-weight: 900;
  letter-spacing: .14em;
}
.card ul, .flow ul { color: var(--muted); line-height: 1.85; padding-left: 20px; }
.flow { display: grid; gap: 16px; margin-top: 26px; }
.flow-item {
  display: grid;
  grid-template-columns: 72px 1fr;
  gap: 18px;
  align-items: start;
  padding: 22px;
  border: 1px solid var(--line);
  border-radius: 22px;
  background: rgba(13, 24, 49, .58);
}
.flow-index {
  display: grid;
  place-items: center;
  width: 52px;
  height: 52px;
  border-radius: 50%;
  color: #04101d;
  background: linear-gradient(135deg, var(--brand), #b7f7ff);
  font-weight: 900;
}
.callout { padding: 22px; margin-top: 22px; }
.callout.warn { border-color: rgba(255, 209, 102, .35); background: rgba(255, 209, 102, .08); }
.callout.good { border-color: rgba(124, 242, 176, .35); background: rgba(124, 242, 176, .07); }
.callout.danger { border-color: rgba(255, 138, 161, .35); background: rgba(255, 138, 161, .07); }
.button-row { display: flex; flex-wrap: wrap; gap: 14px; margin-top: 26px; }
.button {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  border-radius: 999px;
  padding: 12px 18px;
  font-weight: 900;
}
.button.primary { color: #04101d; background: linear-gradient(135deg, var(--brand), #b7f7ff); }
.button.ghost { border: 1px solid var(--line); background: rgba(255,255,255,.04); }
.table-wrap { overflow-x: auto; margin-top: 24px; }
table {
  width: 100%;
  border-collapse: collapse;
  border: 1px solid var(--line);
  border-radius: 18px;
  overflow: hidden;
}
th, td { padding: 14px 16px; border-bottom: 1px solid rgba(139,207,255,.12); text-align: left; vertical-align: top; }
th { color: var(--text); background: rgba(84,229,255,.08); }
td { color: var(--muted); }
.faq { display: grid; gap: 14px; margin-top: 24px; }
details {
  border: 1px solid var(--line);
  border-radius: 18px;
  padding: 16px 18px;
  background: rgba(13, 24, 49, .58);
}
summary { cursor: pointer; font-weight: 900; }
.footer {
  width: min(1120px, calc(100% - 32px));
  margin: 0 auto;
  padding: 38px 0 68px;
  border-top: 1px solid rgba(139,207,255,.16);
}
.footer p { margin: 6px 0; font-size: 14px; }
.footer a { color: var(--brand); }
@media (max-width: 860px) {
  .site-header { align-items: flex-start; flex-direction: column; }
  .hero, .grid, .grid.two { grid-template-columns: 1fr; }
  .flow-item { grid-template-columns: 1fr; }
}