:root {
  color-scheme: dark;
  --background: #030303;
  --foreground: #ffffff;
  --text-muted: #a1a1aa;
  --text-soft: #d4d4d8;
  --primary: #3b82f6;
  --primary-light: #60a5fa;
  --accent: #8b5cf6;
  --accent-light: #c084fc;
  --surface: rgba(255, 255, 255, 0.035);
  --surface-strong: rgba(15, 23, 42, 0.76);
  --border: rgba(255, 255, 255, 0.1);
  --border-strong: rgba(255, 255, 255, 0.17);
  --shadow: 0 24px 80px rgba(0, 0, 0, 0.45);
  --container: 1200px;
  --nav-height: 74px;
  font-family:
    Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI",
    "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  min-width: 320px;
  background:
    radial-gradient(circle at 18% 26%, rgba(59, 130, 246, 0.16), transparent 24rem),
    radial-gradient(circle at 82% 31%, rgba(139, 92, 246, 0.2), transparent 24rem),
    var(--background);
  color: var(--foreground);
  font-family: inherit;
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

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

button,
a {
  -webkit-tap-highlight-color: transparent;
}

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

.navbar {
  position: fixed;
  inset: 0 0 auto;
  z-index: 20;
  height: var(--nav-height);
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
  background: rgba(3, 3, 3, 0.78);
  backdrop-filter: blur(18px);
}

.nav-container {
  display: flex;
  height: 100%;
  align-items: center;
  justify-content: space-between;
}

.logo {
  font-size: 1.5rem;
  font-weight: 760;
  letter-spacing: 0;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 4rem;
  color: rgba(255, 255, 255, 0.86);
  font-size: 0.98rem;
  font-weight: 620;
}

.nav-links a {
  transition:
    color 180ms ease,
    transform 180ms ease;
}

.nav-links a:hover,
.nav-links a:focus-visible {
  color: #ffffff;
  transform: translateY(-1px);
}

.section {
  position: relative;
  overflow: hidden;
}

.hero {
  min-height: 100svh;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: calc(var(--nav-height) + 72px) 0 96px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.1);
  isolation: isolate;
}

.hero-content {
  position: relative;
  z-index: 2;
  max-width: 1160px;
  text-align: center;
}

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

h1 {
  margin-bottom: 1.45rem;
  font-size: 4.7rem;
  font-weight: 780;
  line-height: 1.06;
  letter-spacing: 0;
}

h1 span,
.principle-number {
  background: linear-gradient(135deg, var(--primary-light) 10%, var(--accent-light) 88%);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

.hero p {
  max-width: 760px;
  margin: 0 auto 2.15rem;
  color: var(--text-soft);
  font-size: 1.24rem;
  line-height: 1.85;
}

.hero-actions {
  display: flex;
  justify-content: center;
  gap: 1.45rem;
}

.btn {
  display: inline-flex;
  min-width: 172px;
  min-height: 56px;
  align-items: center;
  justify-content: center;
  border-radius: 999px;
  border: 1px solid transparent;
  font-size: 1rem;
  font-weight: 700;
  transition:
    transform 220ms ease,
    border-color 220ms ease,
    background 220ms ease,
    box-shadow 220ms ease;
}

.btn:hover,
.btn:focus-visible {
  transform: translateY(-2px);
}

.btn-primary {
  background: linear-gradient(135deg, #2f7dff, #aa5cff);
  color: #fff;
  box-shadow: 0 18px 36px rgba(83, 95, 255, 0.28);
}

.btn-primary:hover,
.btn-primary:focus-visible {
  box-shadow: 0 24px 44px rgba(83, 95, 255, 0.36);
}

.btn-secondary {
  background: rgba(0, 0, 0, 0.36);
  border-color: rgba(255, 255, 255, 0.64);
  color: #fff;
}

.btn-secondary:hover,
.btn-secondary:focus-visible {
  border-color: #fff;
  background: rgba(255, 255, 255, 0.08);
}

.ambient,
.arc {
  position: absolute;
  pointer-events: none;
  z-index: 0;
}

.ambient {
  width: clamp(210px, 27vw, 430px);
  aspect-ratio: 1;
  border-radius: 50%;
  filter: blur(72px);
  opacity: 0.58;
}

.ambient-blue {
  left: 12%;
  top: 28%;
  background: rgba(37, 99, 235, 0.76);
}

.ambient-violet {
  right: 14%;
  top: 30%;
  background: rgba(124, 58, 237, 0.72);
}

.arc {
  width: 64vw;
  height: 32vw;
  min-width: 580px;
  min-height: 300px;
  border: 1px solid rgba(96, 165, 250, 0.15);
  border-color: rgba(96, 165, 250, 0.14) transparent transparent;
  border-radius: 50%;
  opacity: 0.72;
}

.arc-left {
  left: -18vw;
  bottom: 0;
  transform: rotate(12deg);
}

.arc-right {
  right: -16vw;
  bottom: 0;
  border-top-color: rgba(168, 85, 247, 0.2);
  transform: rotate(-12deg);
}

.scroll-cue {
  position: absolute;
  left: 50%;
  bottom: 32px;
  z-index: 3;
  width: 32px;
  height: 32px;
  transform: translateX(-50%);
  color: rgba(255, 255, 255, 0.44);
}

.scroll-cue span {
  display: block;
  width: 17px;
  height: 17px;
  margin: 4px auto 0;
  border-right: 3px solid currentColor;
  border-bottom: 3px solid currentColor;
  transform: rotate(45deg);
}

.philosophy {
  padding: 2.1rem 0 1.5rem;
  border-bottom: 1px solid rgba(255, 255, 255, 0.1);
  background: linear-gradient(180deg, rgba(15, 23, 42, 0.42), rgba(2, 6, 23, 0.08));
}

.section-heading {
  margin: 0 auto 1.7rem;
  text-align: center;
}

.section-heading h2,
.capability h2 {
  margin-bottom: 0.65rem;
  color: #ffffff;
  font-size: 2.55rem;
  font-weight: 760;
  line-height: 1.18;
  letter-spacing: 0;
}

.section-heading p,
.capability p {
  margin-bottom: 0;
  color: var(--text-muted);
  font-size: 1.1rem;
  line-height: 1.9;
}

.principles {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 2rem;
}

.principle-card {
  display: grid;
  grid-template-columns: auto 1fr;
  min-height: 116px;
  align-items: center;
  gap: 1.8rem;
  padding: 1.6rem 2.05rem;
  border: 1px solid var(--border);
  border-radius: 8px;
  background: linear-gradient(180deg, rgba(15, 23, 42, 0.58), rgba(15, 23, 42, 0.32));
  box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.04);
  transition:
    transform 220ms ease,
    border-color 220ms ease,
    background 220ms ease;
}

.principle-card:hover {
  transform: translateY(-4px);
  border-color: var(--border-strong);
  background: linear-gradient(180deg, rgba(30, 41, 59, 0.62), rgba(15, 23, 42, 0.4));
}

.principle-number {
  font-size: 3.65rem;
  font-weight: 760;
  line-height: 1;
}

.principle-card h3 {
  margin-bottom: 0.42rem;
  font-size: 1.23rem;
  font-weight: 740;
  letter-spacing: 0;
}

.principle-card p {
  margin-bottom: 0;
  color: var(--text-muted);
  font-size: 0.97rem;
  line-height: 1.72;
}

.capability {
  padding: 2.7rem 0 2.4rem;
  border-bottom: 1px solid rgba(255, 255, 255, 0.1);
  background:
    radial-gradient(circle at 68% 62%, rgba(59, 130, 246, 0.12), transparent 28rem),
    rgba(3, 7, 18, 0.58);
}

.capability-grid {
  display: grid;
  grid-template-columns: minmax(0, 0.8fr) minmax(360px, 1.2fr);
  gap: 4.4rem;
  align-items: center;
}

.capability-copy {
  max-width: 520px;
}

.orb-panel {
  position: relative;
  min-height: 280px;
  overflow: hidden;
}

.orb {
  position: absolute;
  left: 50%;
  top: 49%;
  width: 178px;
  aspect-ratio: 1;
  border-radius: 50%;
  background:
    radial-gradient(circle at 34% 24%, rgba(255, 255, 255, 0.42), transparent 18%),
    radial-gradient(circle at 68% 78%, rgba(147, 51, 234, 0.95), rgba(37, 99, 235, 0.78) 52%, rgba(10, 20, 58, 0.9));
  box-shadow:
    0 0 70px rgba(96, 165, 250, 0.32),
    0 24px 72px rgba(139, 92, 246, 0.34);
  transform: translate(-50%, -50%);
}

.orb::after {
  content: "";
  position: absolute;
  inset: 58% 12% -10% 12%;
  border-radius: 50%;
  background: rgba(196, 181, 253, 0.32);
  filter: blur(16px);
}

.orbit {
  position: absolute;
  left: 50%;
  top: 51%;
  border: 1px solid rgba(167, 139, 250, 0.45);
  border-radius: 50%;
  transform: translate(-50%, -50%) rotate(-10deg);
}

.orbit-one {
  width: 460px;
  height: 92px;
}

.orbit-two {
  width: 590px;
  height: 128px;
  opacity: 0.54;
}

.orbit-three {
  width: 700px;
  height: 170px;
  opacity: 0.3;
}

.satellite {
  position: absolute;
  display: grid;
  width: 56px;
  height: 56px;
  place-items: center;
  border: 1px solid rgba(255, 255, 255, 0.14);
  border-radius: 50%;
  background: rgba(15, 23, 42, 0.7);
  color: #a78bfa;
  box-shadow: var(--shadow);
}

.satellite svg {
  width: 25px;
  height: 25px;
  fill: none;
  stroke: currentColor;
  stroke-linecap: round;
  stroke-linejoin: round;
  stroke-width: 1.9;
}

.satellite-one {
  left: 18%;
  top: 32%;
}

.satellite-two {
  right: 18%;
  top: 26%;
}

.satellite-three {
  left: 28%;
  bottom: 13%;
}

.footer {
  background: #030303;
}

.footer-grid {
  display: grid;
  grid-template-columns: 220px 1fr;
  gap: 2.3rem;
  align-items: center;
  min-height: 92px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
}

.footer-brand {
  border-right: 1px solid rgba(255, 255, 255, 0.18);
}

.footer-brand h2 {
  margin: 0;
  font-size: 2rem;
  font-weight: 780;
  letter-spacing: 0;
}

.contact-list {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 2rem;
  color: var(--text-soft);
  font-style: normal;
}

.contact-list a,
.contact-list span {
  display: inline-flex;
  min-width: 0;
  align-items: center;
  gap: 0.7rem;
  font-size: 1rem;
  line-height: 1.5;
}

.contact-list a {
  transition: color 180ms ease;
}

.contact-list a:hover,
.contact-list a:focus-visible {
  color: #ffffff;
}

.contact-list svg {
  width: 22px;
  height: 22px;
  flex: 0 0 auto;
  fill: none;
  stroke: currentColor;
  stroke-linecap: round;
  stroke-linejoin: round;
  stroke-width: 1.8;
}

.copyright {
  padding: 1rem 0 1.15rem;
  color: rgba(255, 255, 255, 0.55);
  text-align: center;
  font-size: 0.92rem;
}

@media (max-width: 900px) {
  .nav-links {
    gap: 1.2rem;
    font-size: 0.9rem;
  }

  h1 {
    font-size: 4.25rem;
  }

  .hero p {
    font-size: 1.14rem;
  }

  .section-heading h2,
  .capability h2 {
    font-size: 2.2rem;
  }

  .section-heading p,
  .capability p {
    font-size: 1.04rem;
  }

  .hero {
    min-height: 92svh;
    padding-bottom: 74px;
  }

  .principles,
  .capability-grid,
  .footer-grid,
  .contact-list {
    grid-template-columns: 1fr;
  }

  .principles {
    gap: 1rem;
  }

  .capability-grid {
    gap: 2rem;
  }

  .footer-grid {
    padding: 1.6rem 0;
  }

  .footer-brand {
    border-right: 0;
  }
}

@media (max-width: 640px) {
  .container {
    width: min(100% - 32px, var(--container));
  }

  .navbar {
    height: 68px;
  }

  .logo {
    font-size: 1.25rem;
  }

  .nav-links {
    gap: 0.85rem;
    font-size: 0.82rem;
  }

  .hero {
    padding-top: 112px;
  }

  h1 {
    font-size: 3.15rem;
  }

  .hero-actions {
    flex-direction: column;
    align-items: stretch;
    gap: 0.85rem;
  }

  .btn {
    width: 100%;
  }

  .principle-card {
    grid-template-columns: 1fr;
    gap: 0.9rem;
    padding: 1.35rem;
  }

  .principle-number {
    font-size: 2.45rem;
  }

  .footer-brand h2 {
    font-size: 1.7rem;
  }

  .orb-panel {
    min-height: 240px;
  }

  .orb {
    width: 138px;
  }

  .orbit-one {
    width: 330px;
  }

  .orbit-two {
    width: 430px;
  }

  .orbit-three {
    width: 520px;
  }

  .satellite {
    width: 46px;
    height: 46px;
  }

  .satellite-one {
    left: 4%;
  }

  .satellite-two {
    right: 4%;
  }

  .satellite-three {
    left: 14%;
  }

  .contact-list {
    gap: 0.85rem;
  }
}

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