:root {
  color-scheme: dark;
  --bg: #0d1114;
  --panel: #151b20;
  --panel-2: #1d252b;
  --text: #eef5f2;
  --muted: #9cafaa;
  --line: rgba(238, 245, 242, 0.14);
  --cyan: #43d7d5;
  --amber: #f0b852;
  --green: #7bd88f;
  --ink: #080b0d;
  --max: 1180px;
  font-family:
    Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI",
    "Noto Sans SC", sans-serif;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  background:
    radial-gradient(circle at 78% 8%, rgba(67, 215, 213, 0.14), transparent 28rem),
    linear-gradient(180deg, #0d1114 0%, #11181c 48%, #0d1114 100%);
  color: var(--text);
}

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

img {
  display: block;
  max-width: 100%;
}

.site-shell {
  display: grid;
  grid-template-columns: 11.25rem 1fr;
  min-height: 100vh;
}

.rail {
  position: sticky;
  top: 0;
  height: 100vh;
  display: flex;
  flex-direction: column;
  gap: 2rem;
  padding: 1.25rem;
  border-right: 1px solid var(--line);
  background: rgba(13, 17, 20, 0.84);
  backdrop-filter: blur(18px);
  z-index: 5;
}

.brand {
  display: grid;
  gap: 0.6rem;
}

.brand-mark {
  display: grid;
  place-items: center;
  width: 3rem;
  height: 3rem;
  background: var(--text);
  color: var(--ink);
  border-radius: 0.25rem;
  font-weight: 850;
  letter-spacing: 0;
}

.brand-name {
  font-size: 0.76rem;
  font-weight: 800;
  letter-spacing: 0.08em;
}

.rail-nav {
  display: grid;
  gap: 0.25rem;
}

.rail-nav a,
.rail-action {
  min-height: 2.5rem;
  display: flex;
  align-items: center;
  padding: 0 0.7rem;
  border-radius: 0.25rem;
  color: var(--muted);
  font-size: 0.9rem;
}

.rail-nav a:hover,
.rail-nav a.active,
.rail-action:hover {
  color: var(--text);
  background: rgba(238, 245, 242, 0.08);
}

.rail-action {
  margin-top: auto;
  border: 1px solid var(--line);
}

main {
  min-width: 0;
}

.hero {
  min-height: 92vh;
  display: grid;
  grid-template-columns: minmax(18rem, 0.86fr) minmax(28rem, 1.14fr);
  align-items: center;
  gap: clamp(2rem, 5vw, 5rem);
  padding: clamp(2rem, 5vw, 4.5rem);
  overflow: hidden;
}

.hero-copy {
  max-width: 42rem;
  position: relative;
  z-index: 2;
}

.eyebrow {
  margin: 0 0 1rem;
  color: var(--cyan);
  font-size: 0.78rem;
  font-weight: 800;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

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

h1 {
  margin-bottom: 1.25rem;
  font-size: clamp(3rem, 7vw, 6.7rem);
  line-height: 0.92;
  letter-spacing: 0;
}

h2 {
  margin-bottom: 1rem;
  font-size: clamp(2rem, 4vw, 4.3rem);
  line-height: 1;
  letter-spacing: 0;
}

h3 {
  margin-bottom: 0.65rem;
  font-size: 1.1rem;
}

p {
  color: var(--muted);
  line-height: 1.7;
}

.hero-text {
  max-width: 35rem;
  font-size: 1.05rem;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.8rem;
  margin-top: 2rem;
}

.button {
  min-height: 3rem;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0 1.1rem;
  border-radius: 0.25rem;
  font-weight: 750;
  border: 1px solid var(--line);
}

.button.primary {
  background: var(--cyan);
  border-color: var(--cyan);
  color: #041112;
}

.button.ghost {
  color: var(--text);
  background: rgba(238, 245, 242, 0.06);
}

.hero-visual {
  position: relative;
  min-height: 36rem;
}

.hero-visual img {
  width: min(62rem, 76vw);
  height: 36rem;
  object-fit: cover;
  border-radius: 0.5rem;
  border: 1px solid rgba(238, 245, 242, 0.2);
  box-shadow: 0 2rem 7rem rgba(0, 0, 0, 0.45);
}

.signal-panel {
  position: absolute;
  right: 2rem;
  bottom: 2rem;
  min-width: 11rem;
  padding: 1rem;
  background: rgba(8, 11, 13, 0.76);
  border: 1px solid rgba(238, 245, 242, 0.18);
  border-radius: 0.35rem;
  backdrop-filter: blur(16px);
}

.signal-panel span {
  display: block;
  color: var(--muted);
  font-size: 0.8rem;
}

.signal-panel strong {
  display: block;
  margin-top: 0.3rem;
  color: var(--green);
  font-size: 2rem;
}

.ticker {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  border-block: 1px solid var(--line);
  background: rgba(238, 245, 242, 0.04);
}

.ticker span {
  min-height: 4.25rem;
  display: grid;
  place-items: center;
  padding: 0.75rem;
  border-right: 1px solid var(--line);
  color: var(--muted);
  text-align: center;
  font-size: 0.9rem;
}

.ticker span:last-child {
  border-right: 0;
}

.section {
  width: min(var(--max), calc(100% - 3rem));
  margin-inline: auto;
  padding: clamp(4rem, 8vw, 7rem) 0;
}

.split {
  display: grid;
  grid-template-columns: 0.8fr 1.2fr;
  gap: clamp(2rem, 5vw, 5rem);
}

.section-heading {
  max-width: 32rem;
}

.about {
  display: grid;
  grid-template-columns: 0.78fr 1.22fr;
  gap: clamp(2rem, 5vw, 5rem);
  border-bottom: 1px solid var(--line);
}

.about-body > p {
  max-width: 48rem;
  font-size: 1.02rem;
}

.about-points {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 1px;
  margin-top: 2rem;
  background: var(--line);
  border: 1px solid var(--line);
}

.about-points article {
  min-height: 13rem;
  padding: 1.1rem;
  background: rgba(21, 27, 32, 0.82);
}

.about-points span {
  display: block;
  margin-bottom: 2.4rem;
  color: var(--amber);
  font-weight: 850;
}

.about-points strong {
  display: block;
  margin-bottom: 0.6rem;
}

.system-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  border-top: 1px solid var(--line);
  border-left: 1px solid var(--line);
}

.system-card {
  min-height: 15rem;
  padding: 1.25rem;
  background: rgba(21, 27, 32, 0.78);
  border-right: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}

.card-index {
  display: inline-flex;
  margin-bottom: 2.5rem;
  color: var(--amber);
  font-weight: 850;
}

.platform {
  display: grid;
  grid-template-columns: 1fr minmax(20rem, 28rem);
  gap: clamp(2rem, 5vw, 5rem);
  align-items: stretch;
  border-block: 1px solid var(--line);
}

.platform-copy {
  display: flex;
  flex-direction: column;
  justify-content: center;
}

.module-switcher {
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: 0.5rem;
  padding: 1rem;
}

.switcher-tabs {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 0.4rem;
  margin-bottom: 1rem;
}

.switcher-tabs button {
  min-height: 2.75rem;
  border: 1px solid var(--line);
  border-radius: 0.25rem;
  background: transparent;
  color: var(--muted);
  font: inherit;
  font-weight: 750;
  cursor: pointer;
}

.switcher-tabs button.active {
  background: var(--text);
  color: var(--ink);
}

.module-content {
  display: none;
  min-height: 18rem;
  padding: 1.25rem;
  background:
    linear-gradient(135deg, rgba(67, 215, 213, 0.12), transparent 44%),
    var(--panel-2);
  border-radius: 0.35rem;
}

.module-content.active {
  display: flex;
  flex-direction: column;
  justify-content: flex-end;
}

.delivery-track {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1px;
  list-style: none;
  padding: 0;
  margin: 2rem 0 0;
  background: var(--line);
  border: 1px solid var(--line);
}

.delivery-track li {
  min-height: 18rem;
  padding: 1.25rem;
  background: #10161a;
}

.delivery-track span {
  color: var(--cyan);
  font-weight: 850;
}

.delivery-track h3 {
  margin-top: 6rem;
}

.contact {
  display: grid;
  grid-template-columns: 1fr minmax(18rem, 28rem);
  gap: clamp(2rem, 5vw, 5rem);
  align-items: center;
}

.contact > div:first-child {
  transform: translateY(-2rem);
}

.contact-panel {
  padding: 1.25rem;
  background: var(--text);
  color: var(--ink);
  border-radius: 0.5rem;
}

.contact-panel p {
  color: rgba(8, 11, 13, 0.72);
}

.contact-panel .button {
  width: 100%;
  margin-top: 1rem;
}

@media (max-width: 980px) {
  .site-shell {
    display: block;
  }

  .rail {
    position: sticky;
    height: auto;
    flex-direction: row;
    align-items: center;
    overflow-x: auto;
    padding: 0.75rem;
  }

  .brand {
    display: flex;
    align-items: center;
    flex: 0 0 auto;
  }

  .brand-name {
    display: none;
  }

  .rail-nav {
    display: flex;
    flex: 1 0 auto;
  }

  .rail-action {
    margin-top: 0;
    flex: 0 0 auto;
  }

  .hero,
  .about,
  .split,
  .platform,
  .contact {
    grid-template-columns: 1fr;
  }

  .hero {
    min-height: auto;
    padding: 3rem 1.5rem;
  }

  .hero-visual {
    min-height: auto;
  }

  .hero-visual img {
    width: 100%;
    height: auto;
    aspect-ratio: 16 / 10;
  }

  .ticker,
  .about-points,
  .delivery-track {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 640px) {
  .rail-nav a,
  .rail-action {
    font-size: 0.82rem;
    padding-inline: 0.55rem;
  }

  h1 {
    font-size: 3.2rem;
  }

  .hero-actions,
  .hero-actions .button {
    width: 100%;
  }

  .system-grid,
  .about-points,
  .ticker,
  .delivery-track {
    grid-template-columns: 1fr;
  }

  .ticker span {
    border-right: 0;
    border-bottom: 1px solid var(--line);
  }

  .section {
    width: min(100% - 2rem, var(--max));
  }

  .signal-panel {
    right: 1rem;
    bottom: 1rem;
  }
}