:root {
  color-scheme: dark;
  --bg: #070a12;
  --bg-2: #0b1020;
  --fg: rgba(255, 255, 255, 0.92);
  --muted: rgba(255, 255, 255, 0.66);
  --line: rgba(255, 255, 255, 0.1);

  --card: rgba(255, 255, 255, 0.05);
  --card-strong: rgba(255, 255, 255, 0.07);
  --shadow: 0 16px 60px rgba(0, 0, 0, 0.55);

  --accent: #78a6ff;
  --accent-2: #8cffd1;
  --accent-3: #f7b8ff;

  --radius: 18px;
  --radius-sm: 14px;
  --container: 1120px;

  --step--1: clamp(0.92rem, 0.88rem + 0.2vw, 1rem);
  --step-0: clamp(1rem, 0.95rem + 0.3vw, 1.1rem);
  --step-1: clamp(1.2rem, 1.08rem + 0.6vw, 1.55rem);
  --step-2: clamp(1.6rem, 1.35rem + 1.2vw, 2.25rem);
  --step-3: clamp(2.2rem, 1.75rem + 2vw, 3.1rem);
}

*,
*::before,
*::after {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  background: radial-gradient(1200px 800px at 20% -10%, rgba(120, 166, 255, 0.22), transparent 60%),
    radial-gradient(900px 700px at 80% 10%, rgba(140, 255, 209, 0.14), transparent 55%),
    radial-gradient(1000px 800px at 60% 80%, rgba(247, 184, 255, 0.12), transparent 60%),
    linear-gradient(180deg, var(--bg), var(--bg-2));
  color: var(--fg);
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto,
    "Noto Sans SC", "PingFang SC", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
  font-size: var(--step-0);
  line-height: 1.65;
  letter-spacing: 0.01em;
  text-rendering: geometricPrecision;
}

a {
  color: inherit;
  text-decoration: none;
}

strong {
  font-weight: 650;
}

.skip {
  position: absolute;
  left: -999px;
  top: -999px;
  padding: 10px 12px;
  background: rgba(0, 0, 0, 0.7);
  border: 1px solid var(--line);
  border-radius: 10px;
  z-index: 9999;
}

.skip:focus {
  left: 16px;
  top: 16px;
}

.container {
  width: min(var(--container), calc(100% - 48px));
  margin: 0 auto;
}

.muted {
  color: var(--muted);
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  backdrop-filter: blur(14px);
  background: rgba(7, 10, 18, 0.65);
  border-bottom: 1px solid rgba(255, 255, 255, 0.07);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 14px 0;
  gap: 16px;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 12px;
}

.brand-mark {
  width: 30px;
  height: 30px;
  border-radius: 10px;
  background: linear-gradient(135deg, rgba(120, 166, 255, 0.95), rgba(140, 255, 209, 0.95));
  box-shadow: 0 10px 34px rgba(120, 166, 255, 0.2);
}

.brand-text {
  font-weight: 720;
  letter-spacing: 0.16em;
  font-size: 0.98rem;
}

.site-nav {
  display: flex;
  align-items: center;
  gap: 18px;
}

.site-nav a {
  padding: 8px 10px;
  border-radius: 12px;
  color: rgba(255, 255, 255, 0.78);
  font-weight: 520;
  font-size: var(--step--1);
}

.site-nav a:hover {
  background: rgba(255, 255, 255, 0.06);
  color: rgba(255, 255, 255, 0.92);
}

.nav-cta {
  background: rgba(120, 166, 255, 0.14);
  border: 1px solid rgba(120, 166, 255, 0.35);
}

.nav-toggle {
  display: none;
  border: 1px solid rgba(255, 255, 255, 0.12);
  background: rgba(255, 255, 255, 0.04);
  border-radius: 14px;
  padding: 10px;
  cursor: pointer;
}

.nav-toggle span {
  display: block;
  width: 22px;
  height: 2px;
  background: rgba(255, 255, 255, 0.84);
  border-radius: 2px;
}

.nav-toggle span + span {
  margin-top: 6px;
}

.hero {
  padding: 86px 0 46px;
}

.hero-inner {
  display: grid;
  grid-template-columns: 1.15fr 0.85fr;
  align-items: center;
  gap: 36px;
}

.kicker {
  color: rgba(140, 255, 209, 0.9);
  text-transform: uppercase;
  letter-spacing: 0.26em;
  font-size: 0.82rem;
  margin: 0 0 12px;
}

.hero h1 {
  margin: 0;
  font-size: var(--step-3);
  line-height: 1.08;
  letter-spacing: -0.02em;
}

.lead {
  margin: 18px 0 0;
  color: rgba(255, 255, 255, 0.8);
  font-size: var(--step-1);
  max-width: 62ch;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 22px;
}

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 12px 16px;
  border-radius: 14px;
  border: 1px solid rgba(120, 166, 255, 0.35);
  background: linear-gradient(135deg, rgba(120, 166, 255, 0.24), rgba(140, 255, 209, 0.14));
  box-shadow: 0 18px 46px rgba(0, 0, 0, 0.35);
  font-weight: 640;
  letter-spacing: 0.02em;
}

.button:hover {
  border-color: rgba(140, 255, 209, 0.5);
}

.button-ghost {
  background: rgba(255, 255, 255, 0.04);
  border-color: rgba(255, 255, 255, 0.14);
}

.hero-metrics {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 12px;
  margin: 28px 0 0;
  padding: 14px;
  border-radius: var(--radius);
  background: rgba(255, 255, 255, 0.03);
  border: 1px solid rgba(255, 255, 255, 0.08);
}

.hero-metrics dt {
  font-size: 0.75rem;
  color: var(--muted);
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

.hero-metrics dd {
  margin: 4px 0 0;
  font-weight: 650;
}

.hero-art {
  position: relative;
  height: 420px;
  border-radius: 28px;
  overflow: hidden;
  background: radial-gradient(300px 240px at 30% 30%, rgba(120, 166, 255, 0.26), transparent 60%),
    radial-gradient(320px 250px at 75% 25%, rgba(140, 255, 209, 0.18), transparent 60%),
    linear-gradient(180deg, rgba(255, 255, 255, 0.04), rgba(255, 255, 255, 0.02));
  border: 1px solid rgba(255, 255, 255, 0.08);
  box-shadow: var(--shadow);
}

.grid {
  position: absolute;
  inset: 0;
  background-image: linear-gradient(rgba(255, 255, 255, 0.06) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 255, 255, 0.06) 1px, transparent 1px);
  background-size: 48px 48px;
  opacity: 0.22;
  transform: perspective(900px) rotateX(60deg) translateY(70px);
  transform-origin: top;
}

.orb {
  position: absolute;
  width: 280px;
  height: 280px;
  border-radius: 999px;
  filter: blur(14px);
  opacity: 0.7;
  mix-blend-mode: screen;
}

.orb-a {
  left: -70px;
  top: -80px;
  background: radial-gradient(circle at 30% 30%, rgba(120, 166, 255, 0.9), transparent 55%);
}

.orb-b {
  right: -90px;
  top: 40px;
  background: radial-gradient(circle at 30% 30%, rgba(140, 255, 209, 0.92), transparent 58%);
}

.orb-c {
  left: 40px;
  bottom: -120px;
  background: radial-gradient(circle at 30% 30%, rgba(247, 184, 255, 0.86), transparent 58%);
}

.section {
  padding: 74px 0;
}

.section-head {
  margin-bottom: 26px;
}

.section-head h2 {
  margin: 0;
  font-size: var(--step-2);
  letter-spacing: -0.02em;
}

.section-head p {
  margin: 10px 0 0;
  color: var(--muted);
  max-width: 70ch;
}

.cards {
  display: grid;
  gap: 16px;
}

.cards.two {
  grid-template-columns: repeat(2, 1fr);
}

.cards.three {
  grid-template-columns: repeat(3, 1fr);
}

.card {
  background: linear-gradient(180deg, var(--card), rgba(255, 255, 255, 0.02));
  border: 1px solid rgba(255, 255, 255, 0.09);
  border-radius: var(--radius);
  padding: 20px;
  box-shadow: 0 18px 52px rgba(0, 0, 0, 0.25);
}

.card h3 {
  margin: 0 0 10px;
  letter-spacing: -0.01em;
}

.card h4 {
  margin: 0 0 8px;
}

.card p {
  margin: 0;
  color: rgba(255, 255, 255, 0.78);
}

.card p + p {
  margin-top: 10px;
}

.card.compact {
  padding: 18px;
  background: linear-gradient(180deg, var(--card-strong), rgba(255, 255, 255, 0.02));
}

.tag {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 0.78rem;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: rgba(255, 255, 255, 0.7);
  margin: 0 0 12px;
}

.bullets {
  margin: 14px 0 0;
  padding-left: 18px;
  color: rgba(255, 255, 255, 0.74);
}

.bullets li {
  margin: 8px 0;
}

.callout {
  margin-top: 18px;
  padding: 18px 20px;
  border-radius: var(--radius);
  border: 1px solid rgba(140, 255, 209, 0.22);
  background: radial-gradient(800px 240px at 20% 20%, rgba(140, 255, 209, 0.12), transparent 55%),
    rgba(255, 255, 255, 0.03);
}

.callout-title {
  margin: 0;
  color: rgba(140, 255, 209, 0.86);
  letter-spacing: 0.16em;
  text-transform: uppercase;
  font-size: 0.78rem;
}

.callout p {
  margin: 10px 0 0;
}

.flywheel {
  margin-top: 18px;
  border-radius: var(--radius);
  border: 1px solid rgba(255, 255, 255, 0.1);
  background: rgba(255, 255, 255, 0.03);
  padding: 20px;
}

.flywheel h3 {
  margin: 0 0 12px;
}

.flywheel-grid {
  display: grid;
  grid-template-columns: repeat(7, 1fr);
  align-items: center;
  gap: 10px;
}

.flywheel-node {
  grid-column: span 1;
  padding: 14px 14px;
  border-radius: var(--radius-sm);
  border: 1px solid rgba(255, 255, 255, 0.12);
  background: linear-gradient(180deg, rgba(255, 255, 255, 0.05), rgba(255, 255, 255, 0.02));
}

.node-title {
  margin: 0;
  font-weight: 700;
}

.node-body {
  margin: 6px 0 0;
  color: var(--muted);
  font-size: var(--step--1);
}

.flywheel-arrow {
  text-align: center;
  color: rgba(255, 255, 255, 0.5);
  font-size: 1.1rem;
}

.lead-compact {
  font-size: var(--step-1);
}

.pill-row {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 14px;
}

.pill {
  border: 1px solid rgba(255, 255, 255, 0.16);
  background: rgba(255, 255, 255, 0.04);
  border-radius: 999px;
  padding: 8px 10px;
  font-size: 0.86rem;
  color: rgba(255, 255, 255, 0.78);
}

.principles {
  margin-top: 18px;
}

.principles h3 {
  margin: 0 0 12px;
}

.timeline {
  list-style: none;
  padding: 0;
  margin: 0;
  border-left: 1px solid rgba(255, 255, 255, 0.12);
}

.timeline-item {
  display: grid;
  grid-template-columns: 22px 1fr;
  column-gap: 14px;
  padding: 16px 0 16px 0;
}

.timeline-dot {
  width: 12px;
  height: 12px;
  border-radius: 999px;
  background: rgba(120, 166, 255, 0.9);
  margin-left: -6px;
  margin-top: 6px;
  box-shadow: 0 0 0 5px rgba(120, 166, 255, 0.12);
}

.timeline-time {
  margin: 0;
  color: rgba(140, 255, 209, 0.78);
  letter-spacing: 0.18em;
  text-transform: uppercase;
  font-size: 0.78rem;
}

.timeline-content h3 {
  margin: 8px 0 6px;
}

.note {
  margin-top: 14px;
  padding: 14px 16px;
  border-radius: var(--radius);
  border: 1px solid rgba(255, 255, 255, 0.1);
  background: rgba(255, 255, 255, 0.02);
}

.text-link {
  color: rgba(120, 166, 255, 0.95);
}

.text-link:hover {
  color: rgba(140, 255, 209, 0.95);
}

.contact {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 14px;
}

.contact-card {
  border-radius: var(--radius);
  border: 1px solid rgba(255, 255, 255, 0.1);
  background: rgba(255, 255, 255, 0.03);
  padding: 18px;
}

.contact-label {
  margin: 0;
  color: var(--muted);
  letter-spacing: 0.16em;
  text-transform: uppercase;
  font-size: 0.78rem;
}

.contact-value {
  margin: 10px 0 0;
  font-weight: 650;
}

.site-footer {
  padding: 28px 0 48px;
  border-top: 1px solid rgba(255, 255, 255, 0.08);
  background: rgba(0, 0, 0, 0.18);
}

.footer-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  flex-wrap: wrap;
}

.footer-brand {
  margin: 0;
  font-weight: 740;
  letter-spacing: 0.18em;
}

@media (max-width: 920px) {
  .hero-inner {
    grid-template-columns: 1fr;
  }

  .hero-art {
    height: 320px;
  }

  .cards.three {
    grid-template-columns: 1fr;
  }

  .cards.two {
    grid-template-columns: 1fr;
  }

  .contact {
    grid-template-columns: 1fr;
  }

  .flywheel-grid {
    grid-template-columns: 1fr;
  }

  .flywheel-arrow {
    display: none;
  }
}

@media (max-width: 760px) {
  .nav-toggle {
    display: inline-flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    gap: 0;
  }

  .site-nav {
    display: none;
    position: absolute;
    left: 0;
    right: 0;
    top: 64px;
    padding: 14px;
    flex-direction: column;
    gap: 8px;
    background: rgba(7, 10, 18, 0.86);
    border-bottom: 1px solid rgba(255, 255, 255, 0.08);
  }

  .site-nav.is-open {
    display: flex;
  }

  .site-nav a {
    width: 100%;
    padding: 12px;
  }

  .hero {
    padding-top: 62px;
  }

  .hero-metrics {
    grid-template-columns: repeat(2, 1fr);
  }
}