:root {
  --bg: #071314;
  --surface: #0d2021;
  --surface-2: #122b2a;
  --surface-3: #173534;
  --fg: #f4f4f4;
  --muted: #c6c6c6;
  --subtle: #8d8d8d;
  --border: #244442;
  --accent: #d98a24;
  --accent-strong: #f1b04d;
  --blue: #78a9ff;
  --green: #24a148;
  --container: 1440px;
  --gutter: 32px;
  --nav-h: 56px;
  --font-display: "IBM Plex Sans", "Helvetica Neue", Arial, "Microsoft YaHei", sans-serif;
  --font-body: "IBM Plex Sans", "Helvetica Neue", Arial, "Microsoft YaHei", sans-serif;
  --font-mono: "IBM Plex Mono", Consolas, monospace;
}

*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  background:
    radial-gradient(circle at 78% 10%, color-mix(in oklch, var(--green) 14%, transparent) 0 18rem, transparent 34rem),
    radial-gradient(circle at 12% 28%, color-mix(in oklch, var(--blue) 10%, transparent) 0 16rem, transparent 32rem),
    linear-gradient(180deg, color-mix(in oklch, var(--surface-2) 42%, var(--bg)), var(--bg) 46rem);
  color: var(--fg);
  font-family: var(--font-body);
  line-height: 1.5;
  text-rendering: optimizeLegibility;
  -webkit-font-smoothing: antialiased;
}
a { color: inherit; text-decoration: none; }
p, h1, h2, h3 { margin: 0; }
p { text-wrap: pretty; }
h1, h2, h3 { font-family: var(--font-display); text-wrap: balance; }

.container {
  width: 100%;
  max-width: var(--container);
  margin: 0 auto;
  padding: 0 var(--gutter);
}

.topnav {
  position: sticky;
  top: 0;
  z-index: 30;
  height: var(--nav-h);
  background: color-mix(in oklch, var(--bg) 88%, transparent);
  backdrop-filter: blur(18px);
  border-bottom: 1px solid var(--border);
}

.nav-inner {
  height: var(--nav-h);
  display: grid;
  grid-template-columns: auto 1fr auto;
  align-items: center;
  gap: 24px;
}

.brand {
  display: flex;
  align-items: center;
  gap: 12px;
  min-width: 176px;
  font-weight: 600;
  letter-spacing: 0;
}

.brand-mark {
  width: 32px;
  height: 32px;
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 2px;
}

.brand-mark span { background: var(--accent); }

.nav-links {
  display: flex;
  align-items: center;
  gap: 18px;
  overflow: hidden;
  white-space: nowrap;
  color: var(--muted);
  font-size: 14px;
  letter-spacing: 0;
}

.nav-links a:hover,
.nav-links a.active { color: var(--fg); }

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: space-between;
  min-height: 48px;
  padding: 14px 18px 14px 16px;
  border: 1px solid transparent;
  border-radius: 0;
  background: transparent;
  color: var(--fg);
  font-size: 14px;
  letter-spacing: 0;
}

.btn::after { content: "→"; margin-left: 32px; }
.btn-primary { background: var(--accent); color: var(--bg); }
.btn-primary:hover { background: var(--accent-strong); }
.btn-secondary { border-color: var(--border); background: color-mix(in oklch, var(--surface) 72%, transparent); }
.btn-ghost { color: var(--accent-strong); padding-inline: 0; }

.section {
  padding: 88px 0;
  border-top: 1px solid var(--border);
}

.section-header {
  display: grid;
  grid-template-columns: minmax(0, 0.82fr) minmax(280px, 0.52fr);
  gap: 48px;
  align-items: end;
  margin-bottom: 40px;
}

.eyebrow {
  margin-bottom: 16px;
  color: var(--accent-strong);
  font-family: var(--font-mono);
  font-size: 12px;
  line-height: 16px;
  letter-spacing: 0;
  text-transform: uppercase;
}

h1 {
  max-width: 820px;
  font-size: clamp(48px, 5.3vw, 78px);
  line-height: 1.08;
  font-weight: 300;
  letter-spacing: 0;
}

h2 {
  font-size: clamp(34px, 3.2vw, 54px);
  line-height: 1.15;
  font-weight: 300;
  letter-spacing: 0;
}

h3 {
  font-size: 20px;
  line-height: 28px;
  font-weight: 600;
}

.lead {
  color: var(--muted);
  font-size: 18px;
  line-height: 30px;
  max-width: 780px;
}

.body-copy {
  display: grid;
  gap: 16px;
  color: var(--muted);
  font-size: 16px;
  line-height: 26px;
}

.block-copy { margin-top: 24px; }

.meta {
  color: var(--subtle);
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0;
}

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

.tag {
  display: inline-flex;
  align-items: center;
  min-height: 28px;
  padding: 4px 10px;
  border: 1px solid var(--border);
  background: color-mix(in oklch, var(--surface-2) 86%, transparent);
  color: var(--muted);
  font-size: 12px;
  letter-spacing: 0;
}

.tag.hot {
  border-color: color-mix(in oklch, var(--accent) 42%, var(--border));
  color: var(--accent-strong);
  background: color-mix(in oklch, var(--accent) 10%, var(--surface));
}

.hero {
  min-height: calc(100vh - var(--nav-h));
  padding: 80px 0 96px;
  display: flex;
  align-items: center;
  border-top: 0;
}

.hero-grid {
  display: grid;
  grid-template-columns: minmax(0, 0.92fr) minmax(520px, 0.78fr);
  gap: 56px;
  align-items: center;
}

.hero-copy {
  display: flex;
  flex-direction: column;
  gap: 28px;
}

.hero-card {
  position: relative;
  min-height: 680px;
  border: 1px solid var(--border);
  background:
    linear-gradient(90deg, color-mix(in oklch, var(--border) 40%, transparent) 1px, transparent 1px),
    linear-gradient(180deg, color-mix(in oklch, var(--border) 32%, transparent) 1px, transparent 1px),
    color-mix(in oklch, var(--surface) 88%, transparent);
  background-size: 48px 48px, 48px 48px, auto;
  overflow: hidden;
}

.hero-card::before {
  content: "";
  position: absolute;
  inset: 10% -16% auto auto;
  width: 360px;
  height: 360px;
  border: 1px solid color-mix(in oklch, var(--blue) 42%, var(--border));
  transform: rotate(30deg);
  opacity: 0.72;
}

.hero-card::after {
  content: "";
  position: absolute;
  inset: auto auto 12% -12%;
  width: 360px;
  height: 220px;
  border: 1px solid color-mix(in oklch, var(--green) 52%, var(--border));
  background: color-mix(in oklch, var(--green) 8%, transparent);
  transform: rotate(-18deg);
}

.platform-map {
  position: relative;
  z-index: 1;
  min-height: 680px;
  padding: 28px;
  display: grid;
  grid-template-rows: auto 1fr auto;
  gap: 24px;
}

.map-top {
  display: flex;
  justify-content: space-between;
  gap: 16px;
  padding-bottom: 18px;
  border-bottom: 1px solid var(--border);
}

.hub-diagram {
  position: relative;
  min-height: 420px;
  display: grid;
  place-items: center;
}

.hub-center {
  position: relative;
  z-index: 2;
  width: 196px;
  height: 196px;
  display: grid;
  place-items: center;
  text-align: center;
  padding: 24px;
  border: 1px solid color-mix(in oklch, var(--accent) 46%, var(--border));
  background: color-mix(in oklch, var(--accent) 10%, var(--surface));
}

.hub-center strong {
  display: block;
  margin-top: 8px;
  color: var(--accent-strong);
  font-size: 22px;
  line-height: 28px;
  font-weight: 400;
}

.hub-node {
  position: absolute;
  width: 146px;
  min-height: 74px;
  padding: 12px;
  border: 1px solid var(--border);
  background: color-mix(in oklch, var(--surface-2) 88%, transparent);
  color: var(--muted);
  font-size: 13px;
  line-height: 18px;
}

.hub-node span {
  display: block;
  margin-bottom: 4px;
  color: var(--blue);
  font-family: var(--font-mono);
  font-size: 11px;
  text-transform: uppercase;
}

.node-a { left: 4%; top: 8%; }
.node-b { right: 4%; top: 14%; }
.node-c { left: 8%; bottom: 15%; }
.node-d { right: 6%; bottom: 10%; }
.node-e { left: 50%; top: 0; transform: translateX(-50%); }
.node-f { left: 50%; bottom: 0; transform: translateX(-50%); }

.connector {
  position: absolute;
  width: 1px;
  height: 360px;
  background: linear-gradient(180deg, transparent, color-mix(in oklch, var(--blue) 52%, var(--border)), transparent);
  transform-origin: center;
  opacity: 0.62;
}

.c1 { transform: rotate(0deg); }
.c2 { transform: rotate(60deg); }
.c3 { transform: rotate(120deg); }

.map-footer {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1px;
  background: var(--border);
  border: 1px solid var(--border);
}

.map-stat {
  min-height: 96px;
  padding: 14px;
  background: var(--surface);
}

.map-stat strong {
  display: block;
  margin-bottom: 8px;
  color: var(--accent-strong);
  font-family: var(--font-mono);
  font-size: 28px;
  line-height: 34px;
  font-weight: 400;
}

.structure,
.future {
  display: grid;
  grid-template-columns: 0.9fr 1.1fr;
  gap: 1px;
  border: 1px solid var(--border);
  background: var(--border);
}

.structure-copy,
.structure-visual,
.future-copy,
.network {
  background: var(--surface);
  padding: 32px;
}

.pipeline {
  display: grid;
  grid-template-columns: 0.9fr 1fr;
  align-items: center;
  gap: 24px;
  min-height: 340px;
}

.pillar {
  border: 1px solid color-mix(in oklch, var(--accent) 40%, var(--border));
  background: color-mix(in oklch, var(--accent) 9%, var(--surface));
  padding: 24px;
  min-height: 132px;
}

.pillar h3 { margin-top: 16px; }
.pillar p:not(.meta) { margin-top: 10px; color: var(--muted); }

.branch-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1px;
  background: var(--border);
  border: 1px solid var(--border);
}

.branch-card {
  min-height: 132px;
  padding: 18px;
  background: color-mix(in oklch, var(--surface-2) 86%, transparent);
}

.branch-card .meta { color: var(--blue); }

.six-grid,
.product-grid,
.principle-grid,
.value-grid {
  display: grid;
  gap: 1px;
  border: 1px solid var(--border);
  background: var(--border);
}

.six-grid { grid-template-columns: repeat(6, 1fr); }
.product-grid { grid-template-columns: repeat(5, 1fr); }
.principle-grid { grid-template-columns: repeat(4, 1fr); }
.value-grid { grid-template-columns: repeat(5, 1fr); }

.tile {
  min-height: 196px;
  padding: 22px;
  background: var(--surface);
}

.tile .index {
  display: block;
  margin-bottom: 38px;
  color: var(--accent-strong);
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0;
}

.tile p {
  margin-top: 10px;
  color: var(--muted);
  font-size: 14px;
  line-height: 22px;
}

.compare {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1px;
  border: 1px solid var(--border);
  background: var(--border);
}

.compare-panel {
  padding: 32px;
  background: var(--surface);
}

.compare-panel.solution {
  background:
    radial-gradient(circle at 100% 0, color-mix(in oklch, var(--green) 16%, transparent) 0 10rem, transparent 18rem),
    var(--surface);
}

.compare-list {
  display: grid;
  gap: 1px;
  margin-top: 24px;
  background: var(--border);
  border: 1px solid var(--border);
}

.compare-item {
  display: grid;
  grid-template-columns: 28px 1fr;
  gap: 12px;
  padding: 16px;
  background: color-mix(in oklch, var(--surface-2) 84%, transparent);
  color: var(--muted);
}

.compare-item span:first-child {
  color: var(--accent-strong);
  font-family: var(--font-mono);
}

.network-map {
  position: relative;
  min-height: 430px;
  background:
    linear-gradient(90deg, color-mix(in oklch, var(--border) 44%, transparent) 1px, transparent 1px),
    linear-gradient(180deg, color-mix(in oklch, var(--border) 38%, transparent) 1px, transparent 1px);
  background-size: 40px 40px;
  overflow: hidden;
}

.network-map::before,
.network-map::after {
  content: "";
  position: absolute;
  inset: 14% 18%;
  border: 1px solid color-mix(in oklch, var(--blue) 38%, var(--border));
  transform: rotate(18deg);
}

.network-map::after {
  inset: 22% 10%;
  border-color: color-mix(in oklch, var(--green) 42%, var(--border));
  transform: rotate(-16deg);
}

.network-node {
  position: absolute;
  z-index: 2;
  min-width: 112px;
  padding: 10px 12px;
  border: 1px solid var(--border);
  background: color-mix(in oklch, var(--surface-2) 92%, transparent);
  color: var(--muted);
  font-size: 13px;
  line-height: 18px;
}

.network-node.core {
  left: 50%;
  top: 50%;
  transform: translate(-50%, -50%);
  min-width: 160px;
  border-color: color-mix(in oklch, var(--accent) 48%, var(--border));
  color: var(--accent-strong);
  text-align: center;
}

.nn1 { left: 8%; top: 12%; }
.nn2 { right: 8%; top: 16%; }
.nn3 { left: 12%; bottom: 18%; }
.nn4 { right: 12%; bottom: 15%; }
.nn5 { left: 42%; top: 6%; }
.nn6 { left: 44%; bottom: 6%; }

.future-slogan {
  margin-top: 32px;
  color: var(--accent-strong);
}

.cta {
  background: color-mix(in oklch, var(--surface-2) 72%, var(--bg));
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
}

.cta-box {
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 32px;
  align-items: center;
  padding: 48px 0;
}

.cta .lead { margin-top: 16px; }

.cta-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  justify-content: flex-end;
}

footer {
  padding: 48px 0 40px;
  color: var(--muted);
  background: var(--bg);
}

.footer-grid {
  display: grid;
  grid-template-columns: 1.2fr repeat(3, 0.6fr);
  gap: 32px;
}

footer h3 {
  margin-bottom: 14px;
  color: var(--fg);
  font-size: 16px;
}

footer a,
footer p {
  display: block;
  margin: 8px 0 0;
  color: var(--muted);
  font-size: 14px;
}

.copyright {
  margin-top: 40px;
  padding-top: 20px;
  border-top: 1px solid var(--border);
}

@media (max-width: 1180px) {
  .nav-links { display: none; }
  .hero-grid,
  .structure,
  .pipeline,
  .future { grid-template-columns: 1fr; }

  .hero-card,
  .platform-map { min-height: 560px; }
  .six-grid,
  .product-grid,
  .principle-grid,
  .value-grid { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 820px) {
  :root { --gutter: 20px; }
  .section { padding: 56px 0; }
  .hero { padding: 48px 0 64px; }
  .section-header,
  .compare,
  .cta-box,
  .footer-grid,
  .map-footer,
  .branch-grid { grid-template-columns: 1fr; }

  .hero-card,
  .platform-map { min-height: auto; }
  .hub-diagram {
    min-height: 620px;
    display: grid;
    grid-template-columns: 1fr;
    gap: 12px;
    place-items: stretch;
  }

  .hub-node {
    position: relative;
    inset: auto;
    transform: none;
    width: 100%;
  }

  .connector { display: none; }
  .hub-center {
    width: 100%;
    height: auto;
    min-height: 132px;
  }

  .six-grid,
  .product-grid,
  .principle-grid,
  .value-grid { grid-template-columns: 1fr; }

  .cta-actions { justify-content: flex-start; }
}