:root {
  color-scheme: dark;
  --bg: #050711;
  --text: #f5f8ff;
  --muted: #a8b4c9;
  --soft: rgba(245, 248, 255, 0.72);
  --line: rgba(180, 224, 255, 0.18);
  --accent: #66f1ff;
  --accent-2: #c6ff6d;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  min-height: 100vh;
  overflow-x: hidden;
  background:
    radial-gradient(circle at 18% 14%, rgba(20, 180, 220, 0.18), transparent 30rem),
    radial-gradient(circle at 82% 8%, rgba(198, 255, 109, 0.08), transparent 26rem),
    linear-gradient(180deg, #050711 0%, #080b18 48%, #0b1018 100%);
  color: var(--text);
  font-family:
    Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI",
    "Microsoft YaHei", sans-serif;
  letter-spacing: 0;
}

#neural-field {
  position: fixed;
  inset: 0;
  z-index: 0;
  width: 100%;
  height: 100%;
  opacity: 0.78;
  pointer-events: none;
}

main {
  position: relative;
  z-index: 1;
}

.hero {
  position: relative;
  display: grid;
  grid-template-columns: minmax(0, 1.05fr) minmax(20rem, 0.95fr);
  align-items: center;
  min-height: 100svh;
  padding: clamp(3rem, 7vw, 7rem);
  overflow: hidden;
}

.hero::after {
  position: absolute;
  inset: auto 0 0;
  height: 32%;
  content: "";
  background: linear-gradient(180deg, transparent, rgba(5, 7, 17, 0.82));
  pointer-events: none;
}

.hero-copy {
  max-width: 58rem;
  animation: rise-in 900ms cubic-bezier(0.19, 1, 0.22, 1) both;
}

.kicker,
.section-mark {
  margin: 0 0 1.2rem;
  color: var(--accent);
  font-size: 0.78rem;
  font-weight: 750;
  letter-spacing: 0.16em;
}

.brand-mark {
  margin: 0 0 0.8rem;
  color: #ffffff;
  font-size: clamp(1.3rem, 2.4vw, 2rem);
  font-weight: 780;
  letter-spacing: 0.22em;
  text-transform: uppercase;
}

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

h1 {
  max-width: 8ch;
  margin-bottom: 1rem;
  font-size: clamp(5rem, 11vw, 10rem);
  line-height: 0.9;
  font-weight: 900;
  letter-spacing: 0;
  text-transform: lowercase;
}

.lead {
  max-width: 43rem;
  margin-bottom: 2.2rem;
  color: var(--soft);
  font-size: clamp(1.1rem, 1.55vw, 1.45rem);
  line-height: 1.8;
}

.signal-row {
  display: flex;
  flex-wrap: wrap;
  gap: 0.7rem;
}

.signal-row span {
  display: inline-flex;
  min-height: 2.75rem;
  align-items: center;
  border: 1px solid var(--line);
  border-radius: 999px;
  padding: 0 1.1rem;
  background: rgba(8, 15, 28, 0.58);
  color: #e9fbff;
  backdrop-filter: blur(16px);
}

.orbital {
  position: relative;
  width: min(42vw, 36rem);
  aspect-ratio: 1;
  justify-self: center;
  animation: float-space 7s ease-in-out infinite;
}

.core,
.ring,
.node,
.ambient {
  position: absolute;
  border-radius: 50%;
}

.core {
  inset: 32%;
  background:
    radial-gradient(circle at 38% 34%, #ffffff, var(--accent) 26%, rgba(102, 241, 255, 0.06) 64%),
    #0bffff;
  box-shadow: 0 0 4rem rgba(102, 241, 255, 0.58);
}

.ring {
  inset: 10%;
  border: 1px solid rgba(102, 241, 255, 0.34);
}

.ring-a {
  transform: rotateX(64deg) rotateZ(-18deg);
  animation: orbit 14s linear infinite;
}

.ring-b {
  inset: 20%;
  border-color: rgba(198, 255, 109, 0.34);
  transform: rotateX(72deg) rotateZ(54deg);
  animation: orbit 18s linear infinite reverse;
}

.ring-c {
  inset: 2%;
  border-color: rgba(255, 255, 255, 0.16);
  transform: rotateX(58deg) rotateZ(104deg);
  animation: orbit 22s linear infinite;
}

.node {
  width: 0.7rem;
  height: 0.7rem;
  background: var(--accent-2);
  box-shadow: 0 0 1.5rem rgba(198, 255, 109, 0.7);
}

.node-a {
  top: 16%;
  left: 62%;
}

.node-b {
  right: 12%;
  bottom: 28%;
  background: var(--accent);
}

.node-c {
  bottom: 18%;
  left: 22%;
}

.ambient {
  filter: blur(5rem);
  opacity: 0.44;
  pointer-events: none;
}

.ambient-one {
  width: 28rem;
  height: 28rem;
  top: 12%;
  right: 18%;
  background: rgba(102, 241, 255, 0.28);
}

.ambient-two {
  width: 18rem;
  height: 18rem;
  right: -4rem;
  bottom: 16%;
  background: rgba(198, 255, 109, 0.18);
}

.vision,
.principles,
.closing {
  width: min(1120px, calc(100% - 2rem));
  margin: 0 auto;
}

.vision {
  display: grid;
  grid-template-columns: 1fr 0.78fr;
  gap: clamp(2rem, 6vw, 6rem);
  align-items: start;
  padding: 7rem 0 5rem;
  border-top: 1px solid var(--line);
}

.vision h2,
.closing h2 {
  margin-bottom: 0;
  font-size: clamp(2rem, 4.6vw, 4.6rem);
  line-height: 1.08;
  font-weight: 820;
  letter-spacing: 0;
}

.vision > p {
  margin-top: 2.5rem;
  color: var(--muted);
  font-size: 1.08rem;
  line-height: 2;
}

.principles {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1px;
  padding: 3rem 0 7rem;
}

.principle {
  min-height: 22rem;
  border-top: 1px solid var(--line);
  padding: 2rem clamp(1.1rem, 2vw, 2rem) 0 0;
}

.principle span {
  display: block;
  margin-bottom: 5rem;
  color: var(--accent-2);
  font-size: 0.84rem;
  font-weight: 800;
}

.principle h3 {
  margin-bottom: 1rem;
  font-size: clamp(1.45rem, 2vw, 2rem);
}

.principle p {
  max-width: 20rem;
  color: var(--muted);
  line-height: 1.8;
}

.closing {
  min-height: 55svh;
  padding: 6rem 0 7rem;
  border-top: 1px solid var(--line);
}

.closing h2 {
  max-width: 14ch;
}

.reveal {
  opacity: 0;
  transform: translateY(2rem);
  transition:
    opacity 700ms ease,
    transform 700ms cubic-bezier(0.19, 1, 0.22, 1);
}

.reveal.is-visible {
  opacity: 1;
  transform: translateY(0);
}

@keyframes rise-in {
  from {
    opacity: 0;
    transform: translateY(2rem);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes float-space {
  0%,
  100% {
    transform: translateY(0) scale(1);
  }
  50% {
    transform: translateY(-1.2rem) scale(1.03);
  }
}

@keyframes orbit {
  to {
    rotate: 360deg;
  }
}

@media (max-width: 860px) {
  .hero {
    grid-template-columns: 1fr;
    align-content: center;
    min-height: 96svh;
    padding: 5rem 1rem 3rem;
  }

  h1 {
    max-width: 8.4ch;
    font-size: clamp(3.4rem, 16vw, 5.8rem);
  }

  .orbital {
    width: min(78vw, 24rem);
    margin-top: 2.5rem;
    opacity: 0.86;
  }

  .vision,
  .principles {
    grid-template-columns: 1fr;
  }

  .vision {
    padding-top: 4rem;
  }

  .vision > p {
    margin-top: 0;
  }

  .principles {
    padding-bottom: 4rem;
  }

  .principle {
    min-height: auto;
    padding-bottom: 2.2rem;
  }

  .principle span {
    margin-bottom: 2rem;
  }
}

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 1ms !important;
    animation-iteration-count: 1 !important;
    scroll-behavior: auto !important;
    transition-duration: 1ms !important;
  }
}