:root {
  --ink: #10251f;
  --ink-2: #193a32;
  --paper: #f6f8f5;
  --card: #ffffff;
  --line: #d8e6dd;
  --muted: #5e7068;
  --signal: #12a77d;
  --signal-dark: #0b7d60;
  --amber: #e7a329;
  --blue: #2068d8;
  --shadow: 0 20px 50px rgba(16, 37, 31, 0.12);
}
* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  background: var(--paper);
  color: var(--ink);
  font-family: "Helvetica Neue", "PingFang SC", "Microsoft YaHei", Arial, sans-serif;
  line-height: 1.6;
  margin: 0;
  padding-bottom: 4rem;
}
a { color: inherit; text-decoration: none; }
.site-nav {
  align-items: center;
  background: rgba(16, 37, 31, 0.94);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid rgba(255,255,255,0.1);
  display: flex;
  gap: 1.5rem;
  justify-content: space-between;
  left: 0;
  padding: 0.9rem clamp(1rem, 4vw, 4rem);
  position: fixed;
  right: 0;
  top: 0;
  z-index: 20;
}
.brand { color: #fff; font-size: 1.2rem; font-weight: 900; letter-spacing: 0.03em; }
.brand span { color: var(--signal); }
.nav-links { align-items: center; display: flex; gap: 1rem; }
.nav-links a { color: rgba(255,255,255,0.72); font-size: 0.92rem; }
.nav-links a:hover, .nav-main { color: #fff !important; }
.nav-cta, .btn {
  border: 0;
  border-radius: 0.45rem;
  cursor: pointer;
  display: inline-flex;
  font-weight: 800;
  justify-content: center;
  padding: 0.78rem 1.1rem;
}
.nav-cta, .btn-primary { background: var(--signal); color: #021914; }
.btn-primary:hover { background: var(--signal-dark); color: #fff; }
.btn-ghost { border: 1px solid rgba(255,255,255,0.45); color: #fff; }
.hero {
  align-items: center;
  display: grid;
  gap: clamp(2rem, 4vw, 5rem);
  grid-template-columns: minmax(0, 1.05fr) minmax(320px, 0.95fr);
  min-height: 760px;
  padding: 8.5rem clamp(1rem, 5vw, 5rem) 5rem;
}
.platform-hero {
  background:
    linear-gradient(115deg, rgba(16,37,31,0.98), rgba(16,37,31,0.82) 52%, rgba(18,167,125,0.48)),
    url("https://images.unsplash.com/photo-1601584115197-04ecc0da31d7?auto=format&fit=crop&w=1900&q=80");
  background-position: center;
  background-size: cover;
  color: #fff;
}
.eyebrow {
  color: var(--amber);
  font-size: 0.78rem;
  font-weight: 900;
  letter-spacing: 0.16em;
  margin: 0 0 0.7rem;
  text-transform: uppercase;
}
.hero h1 {
  font-size: clamp(2.4rem, 5.4vw, 5.7rem);
  font-weight: 950;
  letter-spacing: 0;
  line-height: 1.03;
  margin: 0;
  max-width: 980px;
}
.hero-lead {
  color: rgba(255,255,255,0.78);
  font-size: 1.12rem;
  margin: 1.5rem 0;
  max-width: 780px;
}
.hero-actions { display: flex; flex-wrap: wrap; gap: 0.85rem; }
.fine-print { color: rgba(255,255,255,0.52); font-size: 0.82rem; margin-top: 1rem; }
.route-board {
  background: rgba(255,255,255,0.1);
  border: 1px solid rgba(255,255,255,0.22);
  border-radius: 0.7rem;
  box-shadow: 0 30px 70px rgba(0,0,0,0.28);
  overflow: hidden;
  padding: 1.2rem;
}
.board-top, .alert-row {
  align-items: center;
  display: flex;
  justify-content: space-between;
}
.board-top span { color: rgba(255,255,255,0.68); }
.board-top strong { color: #74f2cd; }
.route-map {
  background:
    repeating-linear-gradient(0deg, transparent 0 28px, rgba(255,255,255,0.06) 28px 29px),
    repeating-linear-gradient(90deg, transparent 0 34px, rgba(255,255,255,0.06) 34px 35px),
    rgba(3, 22, 18, 0.64);
  border-radius: 0.45rem;
  height: 260px;
  margin: 1rem 0;
  overflow: hidden;
  position: relative;
}
.line { background: rgba(116,242,205,0.55); display: block; height: 4px; position: absolute; transform-origin: left; }
.line-a { left: 40px; top: 150px; transform: rotate(-18deg); width: 290px; }
.line-b { left: 128px; top: 82px; transform: rotate(28deg); width: 230px; }
.node {
  background: #74f2cd;
  border-radius: 50%;
  box-shadow: 0 0 0 8px rgba(116,242,205,0.15);
  height: 12px;
  position: absolute;
  width: 12px;
}
.node-a { left: 38px; top: 143px; }
.node-b { left: 128px; top: 72px; }
.node-c { left: 286px; top: 126px; }
.node-d { left: 344px; top: 192px; background: #f7c65b; box-shadow: 0 0 0 8px rgba(247,198,91,0.16); }
.board-metrics { display: grid; gap: 0.65rem; grid-template-columns: repeat(4, 1fr); }
.board-metrics div { background: rgba(255,255,255,0.08); border: 1px solid rgba(255,255,255,0.1); border-radius: 0.45rem; padding: 0.8rem; }
.board-metrics strong { color: #74f2cd; display: block; font-size: 1.45rem; }
.board-metrics span { color: rgba(255,255,255,0.62); font-size: 0.78rem; }
.alert-row { background: rgba(18,167,125,0.15); border-radius: 0.45rem; color: rgba(255,255,255,0.8); gap: 0.6rem; margin-top: 0.8rem; padding: 0.8rem; }
.section { padding: 5rem clamp(1rem, 5vw, 5rem); }
.band-light { background: #fff; }
.band-dark { background: var(--ink); color: #fff; }
.section-head { margin: 0 auto 2.2rem; max-width: 860px; text-align: center; }
.section-head.left { margin-left: 0; text-align: left; }
.section-head h2, .cross-card h2, .contact-copy h2 {
  font-size: clamp(1.9rem, 3.5vw, 3.2rem);
  line-height: 1.15;
  margin: 0 0 0.85rem;
}
.section-head p:not(.eyebrow), .cross-card p, .contact-copy p { color: var(--muted); margin: 0; }
.band-dark .section-head p:not(.eyebrow) { color: rgba(255,255,255,0.68); }
.intent-grid, .scene-list {
  display: grid;
  gap: 1rem;
  grid-template-columns: repeat(3, minmax(0, 1fr));
}
.intent-grid article, .scene-list article, .matrix-cell, .cross-card, .lead-form {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: 0.55rem;
  box-shadow: 0 12px 30px rgba(16,37,31,0.06);
  padding: 1.4rem;
}
.intent-grid i { color: var(--signal); font-size: 2rem; }
.intent-grid h3, .matrix-cell h3, .scene-list h3 { font-size: 1.16rem; margin: 0.8rem 0 0.5rem; }
.intent-grid p, .matrix-cell p, .scene-list p { color: var(--muted); margin: 0; }
.capability-matrix {
  display: grid;
  gap: 1rem;
  grid-template-columns: repeat(3, minmax(0, 1fr));
}
.matrix-cell span {
  color: var(--signal-dark);
  font-size: 0.78rem;
  font-weight: 900;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}
.matrix-cell.strong { background: var(--ink); color: #fff; grid-row: span 2; }
.matrix-cell.strong p { color: rgba(255,255,255,0.66); }
.link-cell { border-color: rgba(32,104,216,0.26); }
.link-cell a { color: var(--blue); display: inline-block; font-weight: 900; margin-top: 0.8rem; }
.scene-list { grid-template-columns: repeat(4, minmax(0, 1fr)); }
.scene-list article { background: rgba(255,255,255,0.07); border-color: rgba(255,255,255,0.1); box-shadow: none; }
.scene-list span { color: var(--amber); font-family: Consolas, monospace; font-weight: 900; }
.scene-list p { color: rgba(255,255,255,0.66); }
.cross-card {
  align-items: center;
  display: flex;
  gap: 1rem;
  justify-content: space-between;
  margin: 0 auto;
  max-width: 1100px;
}
.contact-section {
  background:
    linear-gradient(110deg, rgba(16,37,31,0.96), rgba(25,58,50,0.9)),
    url("https://images.unsplash.com/photo-1586528116311-ad8dd3c8310d?auto=format&fit=crop&w=1600&q=80");
  background-size: cover;
  color: #fff;
  display: grid;
  gap: 2rem;
  grid-template-columns: minmax(0, 0.85fr) minmax(320px, 0.7fr);
}
.contact-copy p { color: rgba(255,255,255,0.72); }
.lead-form { background: rgba(255,255,255,0.12); border-color: rgba(255,255,255,0.18); box-shadow: none; }
.lead-form label { color: rgba(255,255,255,0.82); display: block; font-weight: 800; margin-bottom: 0.5rem; }
.lead-form textarea, .lead-form input {
  background: rgba(255,255,255,0.95);
  border: 1px solid transparent;
  border-radius: 0.42rem;
  display: block;
  font: inherit;
  margin-bottom: 0.8rem;
  padding: 0.85rem;
  width: 100%;
}
.lead-form textarea:focus, .lead-form input:focus { border-color: var(--signal); outline: 0; }
.d-none { display: none !important; }
.lead-preview { background: rgba(255,255,255,0.1); border-radius: 0.4rem; color: rgba(255,255,255,0.72); padding: 0.7rem; }
.link-button { background: transparent; border: 0; color: rgba(255,255,255,0.68); cursor: pointer; margin-top: 0.6rem; width: 100%; }
.form-feedback { color: #ffd88a; min-height: 1.2rem; }
.done { color: #fff; text-align: center; }
.done i { color: #74f2cd; display: block; font-size: 3rem; }
.done strong, .done span { display: block; }
.site-footer {
  align-items: center;
  background: #071411;
  color: rgba(255,255,255,0.64);
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
  justify-content: center;
  padding: 2rem 1rem;
}
.site-footer a { color: rgba(255,255,255,0.82); }
@media (max-width: 980px) {
  .nav-links { display: none; }
  .hero, .contact-section { grid-template-columns: 1fr; }
  .hero { min-height: auto; }
  .intent-grid, .capability-matrix, .scene-list { grid-template-columns: 1fr 1fr; }
  .matrix-cell.strong { grid-row: auto; }
  .cross-card { align-items: flex-start; flex-direction: column; }
}
@media (max-width: 620px) {
  body { padding-bottom: 0; }
  .site-nav { gap: 0.7rem; }
  .nav-cta { padding: 0.62rem 0.75rem; }
  .hero { padding-top: 7rem; }
  .intent-grid, .capability-matrix, .scene-list, .board-metrics { grid-template-columns: 1fr; }
  .route-board { padding: 0.85rem; }
  .route-map { height: 210px; }
}