:root {
  color-scheme: dark;
  --bg: #05080d;
  --bg-soft: #09111a;
  --panel: rgba(12, 22, 33, 0.78);
  --panel-strong: rgba(13, 27, 40, 0.92);
  --ink: #eef7ff;
  --muted: #91a8bd;
  --line: rgba(127, 217, 255, 0.18);
  --line-strong: rgba(46, 232, 255, 0.34);
  --brand: #2ee8ff;
  --brand-dark: #0c7184;
  --accent: #5dffa7;
  --warning: #ffd166;
  --shadow: 0 28px 90px rgba(0, 0, 0, 0.38);
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  color: var(--ink);
  font-family: "Microsoft YaHei UI", "Microsoft YaHei", "PingFang SC", "Noto Sans SC", sans-serif;
  background:
    radial-gradient(circle at 16% 8%, rgba(46, 232, 255, 0.22), transparent 29%),
    radial-gradient(circle at 82% 10%, rgba(93, 255, 167, 0.14), transparent 30%),
    radial-gradient(circle at 48% 78%, rgba(12, 113, 132, 0.24), transparent 38%),
    linear-gradient(rgba(46, 232, 255, 0.055) 1px, transparent 1px),
    linear-gradient(90deg, rgba(46, 232, 255, 0.055) 1px, transparent 1px),
    var(--bg);
  background-size: auto, auto, auto, 48px 48px, 48px 48px, auto;
  line-height: 1.6;
}

body::before {
  content: "";
  position: fixed;
  inset: 0;
  pointer-events: none;
  background:
    linear-gradient(180deg, rgba(5, 8, 13, 0.1), rgba(5, 8, 13, 0.68)),
    repeating-linear-gradient(
      0deg,
      rgba(255, 255, 255, 0.025) 0,
      rgba(255, 255, 255, 0.025) 1px,
      transparent 1px,
      transparent 4px
    );
  z-index: -1;
}

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: 24px;
  padding: 14px clamp(20px, 5vw, 72px);
  background: rgba(5, 8, 13, 0.76);
  backdrop-filter: blur(18px);
  border-bottom: 1px solid var(--line);
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  min-width: 0;
}

.brand-logo-shell {
  display: grid;
  place-items: center;
  width: 58px;
  height: 58px;
  flex: 0 0 auto;
  overflow: hidden;
  background: rgba(255, 255, 255, 0.96);
  border: 1px solid rgba(46, 232, 255, 0.22);
  border-radius: 16px;
  box-shadow:
    0 0 26px rgba(46, 232, 255, 0.24),
    inset 0 0 0 1px rgba(255, 255, 255, 0.7);
}

.brand-logo {
  display: block;
  width: 52px;
  height: 52px;
  object-fit: contain;
}

.brand strong,
.brand small {
  display: block;
  line-height: 1.15;
}

.brand strong {
  font-size: 18px;
  font-weight: 900;
}

.brand small {
  margin-top: 3px;
  color: var(--muted);
  font-size: 12px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.site-nav {
  display: flex;
  gap: 22px;
  color: var(--muted);
  font-size: 14px;
  white-space: nowrap;
}

.site-nav a:hover {
  color: var(--brand);
}

.hero {
  position: relative;
  display: grid;
  grid-template-columns: minmax(0, 1.1fr) minmax(300px, 0.9fr);
  gap: clamp(28px, 6vw, 72px);
  min-height: calc(100svh - 88px);
  padding: clamp(56px, 9vw, 116px) clamp(20px, 5vw, 72px) clamp(36px, 6vw, 72px);
  align-items: center;
  overflow: hidden;
}

.hero::after {
  content: "";
  position: absolute;
  right: -120px;
  bottom: 18px;
  width: min(42vw, 520px);
  aspect-ratio: 1;
  border: 1px solid rgba(46, 232, 255, 0.18);
  border-radius: 50%;
  box-shadow:
    inset 0 0 80px rgba(46, 232, 255, 0.08),
    0 0 120px rgba(46, 232, 255, 0.12);
  pointer-events: none;
}

.hero-copy {
  position: relative;
  z-index: 1;
  max-width: 760px;
}

.eyebrow {
  margin: 0 0 12px;
  color: var(--brand);
  font-size: 13px;
  font-weight: 800;
  letter-spacing: 0;
  text-transform: uppercase;
}

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

h1 {
  margin-bottom: 22px;
  max-width: 820px;
  font-size: clamp(42px, 7vw, 86px);
  line-height: 1.05;
  letter-spacing: 0;
}

h2 {
  margin-bottom: 14px;
  font-size: clamp(28px, 4vw, 48px);
  line-height: 1.16;
  letter-spacing: 0;
}

h3 {
  margin-bottom: 10px;
  font-size: 22px;
  line-height: 1.25;
}

.hero-text {
  max-width: 680px;
  color: var(--muted);
  font-size: 18px;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 30px;
}

.status-pill {
  display: inline-flex;
  align-items: center;
  min-height: 38px;
  padding: 8px 14px;
  color: #001117;
  background: var(--brand);
  border-radius: 999px;
  font-weight: 700;
}

.status-pill.muted {
  color: var(--brand);
  background: rgba(46, 232, 255, 0.09);
  border: 1px solid rgba(46, 232, 255, 0.28);
}

.ai-console {
  position: relative;
  z-index: 1;
  overflow: hidden;
  padding: 22px;
  background:
    linear-gradient(140deg, rgba(13, 27, 40, 0.96), rgba(4, 12, 18, 0.86)),
    linear-gradient(rgba(46, 232, 255, 0.08) 1px, transparent 1px),
    linear-gradient(90deg, rgba(46, 232, 255, 0.08) 1px, transparent 1px);
  background-size: auto, 32px 32px, 32px 32px;
  border: 1px solid var(--line-strong);
  border-radius: 24px;
  box-shadow: var(--shadow);
}

.ai-console::before {
  content: "";
  position: absolute;
  inset: -40% -20% auto auto;
  width: 260px;
  height: 260px;
  background: radial-gradient(circle, rgba(46, 232, 255, 0.26), transparent 62%);
  pointer-events: none;
}

.console-top {
  display: flex;
  justify-content: space-between;
  gap: 16px;
  align-items: center;
  color: var(--muted);
  font-size: 12px;
  font-weight: 800;
  letter-spacing: 0.08em;
}

.console-status {
  color: var(--accent);
}

.signal-core {
  position: relative;
  display: grid;
  place-items: center;
  width: min(100%, 360px);
  aspect-ratio: 1;
  margin: 22px auto;
}

.signal-core strong {
  display: grid;
  place-items: center;
  width: 118px;
  height: 118px;
  color: #001117;
  background: radial-gradient(circle at 30% 25%, #fff, var(--brand) 34%, #138fa3 74%);
  border-radius: 50%;
  font-size: 38px;
  box-shadow:
    0 0 40px rgba(46, 232, 255, 0.42),
    0 0 100px rgba(46, 232, 255, 0.18);
}

.orbit {
  position: absolute;
  border: 1px solid rgba(46, 232, 255, 0.32);
  border-radius: 50%;
}

.orbit-one {
  inset: 42px;
}

.orbit-two {
  inset: 82px;
  border-color: rgba(93, 255, 167, 0.28);
}

.node {
  position: absolute;
  width: 12px;
  height: 12px;
  background: var(--accent);
  border-radius: 50%;
  box-shadow: 0 0 24px rgba(93, 255, 167, 0.54);
}

.node-a {
  top: 64px;
  left: 92px;
}

.node-b {
  right: 66px;
  top: 132px;
  background: var(--brand);
}

.node-c {
  bottom: 70px;
  left: 144px;
  background: var(--warning);
}

.console-grid {
  display: grid;
  gap: 12px;
}

.console-grid > div {
  padding: 18px;
  background: rgba(255, 255, 255, 0.045);
  border: 1px solid var(--line);
  border-radius: 16px;
}

.metric {
  display: inline-block;
  margin-bottom: 10px;
  color: var(--accent);
  font-size: 13px;
  font-weight: 800;
}

.console-grid strong {
  display: block;
  margin-bottom: 6px;
  font-size: 20px;
}

.console-grid p,
.capability-card p,
.section-heading p,
.boundary-list p,
.scenario-list p,
.contact-section p {
  color: var(--muted);
}

.section {
  padding: clamp(54px, 8vw, 96px) clamp(20px, 5vw, 72px);
}

.section-heading {
  max-width: 720px;
  margin-bottom: 30px;
}

.section-heading.compact {
  margin-bottom: 0;
}

.capability-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 16px;
}

.capability-card {
  position: relative;
  overflow: hidden;
  min-height: 268px;
  padding: 24px;
  background:
    linear-gradient(145deg, rgba(13, 27, 40, 0.92), rgba(6, 14, 22, 0.82));
  border: 1px solid var(--line);
  border-radius: 18px;
}

.capability-card::after {
  content: "";
  position: absolute;
  right: -44px;
  bottom: -44px;
  width: 130px;
  height: 130px;
  border: 1px solid rgba(46, 232, 255, 0.16);
  border-radius: 50%;
}

.capability-card span {
  display: inline-block;
  margin-bottom: 44px;
  color: var(--brand);
  font-weight: 800;
}

.scenario-section {
  display: grid;
  grid-template-columns: minmax(240px, 0.72fr) minmax(0, 1.28fr);
  gap: clamp(24px, 5vw, 60px);
  align-items: start;
  background: rgba(3, 10, 16, 0.48);
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}

.scenario-list {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 14px;
}

.scenario-list div {
  min-height: 190px;
  padding: 22px;
  background:
    linear-gradient(180deg, rgba(46, 232, 255, 0.08), rgba(255, 255, 255, 0.035));
  border: 1px solid var(--line);
  border-radius: 18px;
}

.scenario-list strong {
  display: block;
  margin-bottom: 12px;
  font-size: 22px;
}

.split-section {
  display: grid;
  grid-template-columns: minmax(240px, 0.7fr) minmax(0, 1.3fr);
  gap: clamp(24px, 5vw, 60px);
  align-items: start;
  background: rgba(8, 18, 28, 0.68);
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}

.boundary-list {
  display: grid;
  gap: 14px;
}

.boundary-list p {
  margin: 0;
  padding: 18px 20px;
  background: rgba(255, 255, 255, 0.045);
  border: 1px solid var(--line);
  border-radius: 14px;
}

.contact-section {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(300px, 460px);
  gap: 28px;
  align-items: stretch;
}

.contact-card {
  display: grid;
  grid-template-columns: 148px minmax(0, 1fr);
  gap: 18px;
  align-items: center;
  padding: 24px;
  background:
    linear-gradient(145deg, rgba(46, 232, 255, 0.16), rgba(93, 255, 167, 0.08));
  color: #fff;
  border-radius: 20px;
  border: 1px solid var(--line);
}

.qr-frame {
  display: grid;
  place-items: center;
  padding: 10px;
  background: #fff;
  border-radius: 18px;
  box-shadow: 0 0 34px rgba(46, 232, 255, 0.16);
}

.qr-frame img {
  display: block;
  width: 128px;
  height: 128px;
}

.contact-card strong {
  display: block;
  margin-bottom: 10px;
  font-size: 22px;
}

.contact-card p {
  color: rgba(255, 255, 255, 0.76);
}

.contact-card span {
  display: inline-flex;
  padding: 6px 10px;
  color: var(--accent);
  background: rgba(93, 255, 167, 0.08);
  border: 1px solid rgba(93, 255, 167, 0.22);
  border-radius: 999px;
  font-size: 12px;
  font-weight: 800;
}

.site-footer {
  display: flex;
  justify-content: space-between;
  gap: 18px;
  padding: 24px clamp(20px, 5vw, 72px);
  color: var(--muted);
  border-top: 1px solid var(--line);
  font-size: 14px;
}

.site-footer p {
  margin: 0;
}

.site-footer a {
  color: var(--brand);
}

.divider {
  margin: 0 10px;
  color: var(--line);
}

@media (max-width: 960px) {
  .hero,
  .split-section,
  .scenario-section,
  .contact-section {
    grid-template-columns: 1fr;
  }

  .hero {
    min-height: auto;
  }

  .capability-grid,
  .scenario-list {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (max-width: 640px) {
  .site-header {
    position: static;
    align-items: flex-start;
    flex-direction: column;
  }

  .site-nav {
    width: 100%;
    justify-content: flex-start;
    gap: 10px;
    overflow-x: auto;
    padding-bottom: 2px;
    scrollbar-width: none;
  }

  .site-nav::-webkit-scrollbar {
    display: none;
  }

  .site-nav a {
    flex: 0 0 auto;
  }

  .brand-logo-shell {
    width: 54px;
    height: 54px;
    border-radius: 15px;
  }

  .brand-logo {
    width: 48px;
    height: 48px;
  }

  h1 {
    font-size: 42px;
  }

  .hero-text {
    font-size: 16px;
  }

  .capability-grid,
  .scenario-list {
    grid-template-columns: 1fr;
  }

  .capability-card {
    min-height: auto;
  }

  .capability-card span {
    margin-bottom: 22px;
  }

  .site-footer {
    flex-direction: column;
  }

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

  .qr-frame {
    width: fit-content;
  }
}