:root {
  --ink: #123044;
  --muted: #5f7888;
  --line: rgba(70, 135, 164, 0.18);
  --blue: #3aa7c8;
  --blue-dark: #187a9b;
  --blue-soft: #e8f8fc;
  --cyan: #7ed7e9;
  --white: #ffffff;
  --shadow: 0 24px 70px rgba(40, 112, 145, 0.16);
  --radius: 8px;
  font-family:
    Inter, "Segoe UI", "PingFang SC", "Microsoft YaHei", Arial, sans-serif;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  color: var(--ink);
  background:
    radial-gradient(circle at 8% 8%, rgba(126, 215, 233, 0.24), transparent 30rem),
    linear-gradient(180deg, #f5fcff 0%, #ffffff 38%, #f7fcfe 100%);
}

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

.site-header {
  position: sticky;
  top: 0;
  z-index: 20;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 32px;
  min-height: 76px;
  padding: 0 6vw;
  border-bottom: 1px solid transparent;
  background: rgba(248, 253, 255, 0.82);
  backdrop-filter: blur(18px);
  transition:
    border-color 180ms ease,
    box-shadow 180ms ease;
}

.site-header[data-elevated="true"] {
  border-color: var(--line);
  box-shadow: 0 12px 36px rgba(23, 98, 130, 0.08);
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  min-width: 184px;
}

.brand-logo {
  width: 42px;
  height: 42px;
  border-radius: 12px;
  object-fit: cover;
  display: block;
  box-shadow: 0 12px 28px rgba(58, 167, 200, 0.28);
}

.brand strong,
.brand small {
  display: block;
}

.brand strong {
  font-size: 17px;
}

.brand small {
  margin-top: 2px;
  color: var(--muted);
  font-size: 11px;
  text-transform: uppercase;
}

.site-nav {
  display: flex;
  align-items: center;
  gap: 26px;
  color: #26475a;
  font-size: 14px;
}

.site-nav a {
  padding: 28px 0;
}

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

.lang-toggle,
.button,
.menu-button {
  font: inherit;
}

.lang-toggle {
  min-width: 54px;
  border: 1px solid var(--line);
  border-radius: 999px;
  padding: 9px 14px;
  color: var(--blue-dark);
  background: rgba(255, 255, 255, 0.78);
  cursor: pointer;
}

.menu-button {
  display: none;
  width: 42px;
  height: 42px;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.74);
}

.menu-button span {
  display: block;
  width: 17px;
  height: 2px;
  margin: 4px auto;
  background: var(--ink);
}

.section {
  padding: 96px 6vw;
}

.section-band {
  padding: 96px 6vw;
}

.constrained {
  width: min(1120px, 100%);
  margin: 0 auto;
}

.hero {
  display: grid;
  grid-template-columns: minmax(0, 1.02fr) minmax(380px, 0.88fr);
  align-items: center;
  min-height: calc(100vh - 76px);
  gap: 64px;
}

.eyebrow {
  margin: 0 0 16px;
  color: var(--blue-dark);
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0.15em;
  text-transform: uppercase;
}

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

h1 {
  max-width: 760px;
  margin-bottom: 24px;
  font-size: clamp(42px, 6vw, 76px);
  line-height: 1.02;
  font-weight: 760;
}

h2 {
  margin-bottom: 18px;
  font-size: clamp(30px, 4vw, 46px);
  line-height: 1.14;
}

h3 {
  margin-bottom: 12px;
  font-size: 20px;
}

.hero-lede,
.section-copy,
.section-heading p,
.capability-list p,
.sector-card p,
.contact-layout p {
  color: var(--muted);
  font-size: 16px;
  line-height: 1.85;
}

.hero-lede {
  max-width: 710px;
  font-size: 18px;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  margin: 34px 0 42px;
}

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 48px;
  border-radius: 999px;
  padding: 0 24px;
  border: 1px solid transparent;
  font-weight: 700;
}

.button.primary {
  color: var(--white);
  background: linear-gradient(135deg, var(--blue-dark), var(--blue));
  box-shadow: 0 16px 38px rgba(24, 122, 155, 0.24);
}

.button.secondary {
  color: var(--blue-dark);
  border-color: var(--line);
  background: rgba(255, 255, 255, 0.72);
}

.hero-metrics {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  max-width: 650px;
  margin: 0;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: rgba(255, 255, 255, 0.64);
  box-shadow: 0 18px 48px rgba(39, 121, 154, 0.08);
}

.hero-metrics div {
  padding: 22px;
}

.hero-metrics div + div {
  border-left: 1px solid var(--line);
}

.hero-metrics dt {
  margin-bottom: 4px;
  font-size: 25px;
  font-weight: 800;
  color: var(--blue-dark);
}

.hero-metrics dd {
  margin: 0;
  color: var(--muted);
  font-size: 13px;
}

.hero-visual {
  position: relative;
  min-height: 560px;
  border: 1px solid rgba(58, 167, 200, 0.22);
  border-radius: 28px;
  overflow: hidden;
  background:
    linear-gradient(135deg, rgba(255, 255, 255, 0.86), rgba(232, 248, 252, 0.58)),
    radial-gradient(circle at 50% 46%, rgba(126, 215, 233, 0.38), transparent 18rem);
  box-shadow: var(--shadow);
}

.hero-visual::before {
  content: "";
  position: absolute;
  inset: 32px;
  border: 1px solid rgba(24, 122, 155, 0.12);
  border-radius: 50%;
}

.orbit,
.signal,
.node,
.core-node {
  position: absolute;
}

.orbit {
  inset: 95px 58px;
  border: 1px solid rgba(24, 122, 155, 0.2);
  border-radius: 50%;
}

.orbit-two {
  inset: 145px 96px;
  transform: rotate(-22deg);
}

.core-node {
  left: 50%;
  top: 50%;
  display: grid;
  width: 156px;
  height: 156px;
  place-items: center;
  transform: translate(-50%, -50%);
  border: 1px solid rgba(255, 255, 255, 0.8);
  border-radius: 50%;
  color: var(--white);
  background: linear-gradient(145deg, #166f91, #49bad3);
  box-shadow: 0 24px 60px rgba(24, 122, 155, 0.28);
}

.core-node span {
  margin-top: 20px;
  font-size: 40px;
  font-weight: 850;
}

.core-node small {
  margin-top: -42px;
  font-size: 10px;
  letter-spacing: 0.16em;
}

.node {
  display: grid;
  min-width: 78px;
  min-height: 78px;
  place-items: center;
  border: 1px solid rgba(58, 167, 200, 0.25);
  border-radius: 22px;
  color: #1a6f8d;
  font-size: 14px;
  font-weight: 800;
  background: rgba(255, 255, 255, 0.72);
  box-shadow: 0 18px 38px rgba(28, 106, 140, 0.12);
}

.node-home {
  left: 50px;
  top: 95px;
}

.node-auto {
  right: 58px;
  top: 120px;
}

.node-energy {
  right: 38px;
  bottom: 126px;
}

.node-compute {
  left: 76px;
  bottom: 96px;
}

.node-sensor {
  left: calc(50% - 42px);
  top: 38px;
}

.signal {
  width: 180px;
  height: 2px;
  transform-origin: left center;
  background: linear-gradient(90deg, transparent, rgba(58, 167, 200, 0.64), transparent);
}

.signal-a {
  left: 32%;
  top: 38%;
  transform: rotate(22deg);
}

.signal-b {
  left: 46%;
  top: 63%;
  transform: rotate(-32deg);
}

.signal-c {
  left: 31%;
  top: 58%;
  transform: rotate(142deg);
}

.about-grid,
.contact-layout {
  display: grid;
  grid-template-columns: minmax(240px, 0.8fr) minmax(0, 1.2fr);
  gap: 72px;
}

.section-heading {
  max-width: 780px;
  margin-bottom: 38px;
}

.sector-grid {
  display: grid;
  grid-template-columns: repeat(5, minmax(0, 1fr));
  gap: 16px;
}

.sector-card,
.capability-list > div,
.contact-card,
.application-panel {
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: rgba(255, 255, 255, 0.72);
  box-shadow: 0 18px 44px rgba(38, 123, 158, 0.08);
}

.sector-card {
  min-height: 260px;
  padding: 26px;
  transition:
    transform 180ms ease,
    box-shadow 180ms ease;
}

.sector-card:hover {
  transform: translateY(-4px);
  box-shadow: 0 26px 54px rgba(38, 123, 158, 0.14);
}

.sector-icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 44px;
  height: 44px;
  margin-bottom: 28px;
  border-radius: 50%;
  color: var(--blue-dark);
  font-size: 13px;
  font-weight: 800;
  background: var(--blue-soft);
}

.capability-layout {
  display: grid;
  grid-template-columns: minmax(280px, 0.9fr) minmax(0, 1.1fr);
  gap: 72px;
  align-items: start;
}

.capability-list {
  display: grid;
  gap: 16px;
}

.capability-list > div {
  padding: 28px;
}

.applications {
  padding-top: 24px;
}

.application-panel {
  display: grid;
  grid-template-columns: minmax(260px, 0.8fr) minmax(0, 1.2fr);
  gap: 40px;
  align-items: center;
  padding: 44px;
  background:
    linear-gradient(135deg, rgba(255, 255, 255, 0.86), rgba(222, 247, 252, 0.78)),
    radial-gradient(circle at 86% 20%, rgba(126, 215, 233, 0.32), transparent 20rem);
}

.application-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

.application-tags span {
  display: inline-flex;
  border: 1px solid rgba(58, 167, 200, 0.22);
  border-radius: 999px;
  padding: 12px 18px;
  color: var(--blue-dark);
  background: rgba(255, 255, 255, 0.72);
}

.contact-card {
  display: grid;
  gap: 12px;
  padding: 30px;
}

.contact-card p {
  margin: 0;
  color: var(--ink);
  font-weight: 800;
}

.contact-card a {
  color: var(--blue-dark);
}

.site-footer {
  display: flex;
  justify-content: space-between;
  gap: 24px;
  padding: 28px 6vw;
  border-top: 1px solid var(--line);
  color: var(--muted);
  font-size: 13px;
}

.site-footer p {
  margin: 0;
}

@media (max-width: 1040px) {
  .hero,
  .about-grid,
  .capability-layout,
  .application-panel,
  .contact-layout {
    grid-template-columns: 1fr;
  }

  .hero {
    min-height: auto;
    padding-top: 72px;
  }

  .hero-visual {
    min-height: 500px;
  }

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

@media (max-width: 720px) {
  .site-header {
    min-height: 68px;
    padding: 0 20px;
  }

  .menu-button {
    display: block;
  }

  .site-nav {
    position: absolute;
    left: 20px;
    right: 20px;
    top: 76px;
    display: none;
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    border: 1px solid var(--line);
    border-radius: var(--radius);
    padding: 10px;
    background: rgba(255, 255, 255, 0.96);
    box-shadow: var(--shadow);
  }

  .site-nav[data-open="true"] {
    display: flex;
  }

  .site-nav a {
    padding: 14px 10px;
  }

  .lang-toggle {
    width: 100%;
    margin-top: 8px;
  }

  .section,
  .section-band {
    padding: 68px 20px;
  }

  h1 {
    font-size: 42px;
  }

  .hero-metrics,
  .sector-grid {
    grid-template-columns: 1fr;
  }

  .hero-metrics div + div {
    border-top: 1px solid var(--line);
    border-left: 0;
  }

  .hero-visual {
    min-height: 420px;
    border-radius: 20px;
  }

  .node {
    min-width: 64px;
    min-height: 64px;
    font-size: 12px;
  }

  .node-home {
    left: 22px;
    top: 84px;
  }

  .node-auto {
    right: 22px;
    top: 98px;
  }

  .node-energy {
    right: 20px;
    bottom: 94px;
  }

  .node-compute {
    left: 28px;
    bottom: 82px;
  }

  .node-sensor {
    left: calc(50% - 32px);
    top: 26px;
  }

  .core-node {
    width: 128px;
    height: 128px;
  }

  .application-panel {
    padding: 28px;
  }

  .site-footer {
    flex-direction: column;
    padding: 24px 20px;
  }
}