:root {
  --ink: #172026;
  --muted: #64717d;
  --line: #d9e1e7;
  --paper: #f7f9f8;
  --white: #ffffff;
  --green: #2f7d5b;
  --teal: #1f6f7a;
  --gold: #b8872d;
  --red: #b95445;
  --shadow: 0 18px 40px rgba(23, 32, 38, 0.10);
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  color: var(--ink);
  background: var(--paper);
  font-family: "Microsoft YaHei", "PingFang SC", Arial, sans-serif;
  line-height: 1.65;
}

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

.site-header {
  min-height: 92vh;
  background:
    linear-gradient(90deg, rgba(247, 249, 248, 0.96), rgba(247, 249, 248, 0.78)),
    url("data:image/svg+xml,%3Csvg width='1400' height='900' viewBox='0 0 1400 900' xmlns='http://www.w3.org/2000/svg'%3E%3Crect width='1400' height='900' fill='%23eef4f0'/%3E%3Cpath d='M0 650 C240 570 390 720 650 620 C900 525 1030 500 1400 585 L1400 900 L0 900 Z' fill='%23dce9df'/%3E%3Cpath d='M0 760 C210 700 430 790 690 720 C950 650 1130 655 1400 715 L1400 900 L0 900 Z' fill='%23c9ddd2'/%3E%3Cpath d='M150 585 L1200 400' stroke='%2387a99a' stroke-width='5' stroke-linecap='round' stroke-dasharray='14 18'/%3E%3Ccircle cx='250' cy='565' r='42' fill='%23ffffff' opacity='.9'/%3E%3Ccircle cx='620' cy='500' r='34' fill='%23ffffff' opacity='.9'/%3E%3Ccircle cx='990' cy='435' r='38' fill='%23ffffff' opacity='.9'/%3E%3Crect x='185' y='610' width='210' height='70' rx='6' fill='%23ffffff' opacity='.85'/%3E%3Crect x='835' y='470' width='230' height='74' rx='6' fill='%23ffffff' opacity='.85'/%3E%3C/svg%3E");
  background-size: cover;
  background-position: center;
}

.nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  max-width: 1180px;
  margin: 0 auto;
  padding: 22px 24px;
}

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

.brand-mark {
  display: grid;
  place-items: center;
  width: 42px;
  height: 42px;
  border-radius: 8px;
  color: var(--white);
  background: var(--green);
  font-weight: 700;
}

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

.brand small {
  color: var(--muted);
  font-size: 12px;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 22px;
  color: #31414a;
  font-size: 14px;
}

.nav-links a:hover {
  color: var(--green);
}

.hero {
  display: grid;
  grid-template-columns: minmax(0, 0.95fr) minmax(420px, 1fr);
  align-items: center;
  gap: 56px;
  max-width: 1180px;
  min-height: calc(92vh - 86px);
  margin: 0 auto;
  padding: 36px 24px 80px;
}

.eyebrow {
  margin: 0 0 12px;
  color: var(--green);
  font-weight: 700;
  letter-spacing: 0;
}

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

h1 {
  max-width: 680px;
  margin-bottom: 22px;
  font-size: 54px;
  line-height: 1.12;
  letter-spacing: 0;
}

.hero-text {
  max-width: 660px;
  color: #384852;
  font-size: 18px;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 30px;
}

.capability-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 24px;
}

.capability-tags span {
  display: inline-flex;
  align-items: center;
  min-height: 34px;
  padding: 0 12px;
  border: 1px solid rgba(47, 125, 91, 0.22);
  border-radius: 8px;
  color: #24493a;
  background: rgba(255, 255, 255, 0.76);
  font-weight: 700;
  font-size: 14px;
}

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 44px;
  padding: 0 18px;
  border: 1px solid var(--line);
  border-radius: 8px;
  font-weight: 700;
}

.button.primary {
  color: var(--white);
  border-color: var(--green);
  background: var(--green);
}

.button.secondary {
  background: rgba(255, 255, 255, 0.72);
}

.control-visual {
  border: 1px solid rgba(217, 225, 231, 0.9);
  border-radius: 8px;
  background: rgba(255, 255, 255, 0.90);
  box-shadow: var(--shadow);
  overflow: hidden;
}

.visual-top,
.risk-strip {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1px;
  background: var(--line);
}

.visual-top {
  grid-template-columns: 1fr 1.2fr;
  align-items: center;
}

.visual-top span,
.visual-top strong,
.risk-strip div {
  background: var(--white);
  padding: 18px;
}

.visual-top span {
  color: var(--muted);
}

.route-map {
  position: relative;
  height: 360px;
  padding: 30px;
  background:
    linear-gradient(rgba(31, 111, 122, 0.07) 1px, transparent 1px),
    linear-gradient(90deg, rgba(31, 111, 122, 0.07) 1px, transparent 1px);
  background-size: 42px 42px;
}

.route-line {
  position: absolute;
  top: 49%;
  left: 12%;
  width: 76%;
  height: 4px;
  background: linear-gradient(90deg, var(--green), var(--teal), var(--gold));
  transform: rotate(-8deg);
  transform-origin: left center;
}

.node {
  position: absolute;
  display: grid;
  gap: 4px;
  width: 132px;
  padding: 12px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--white);
}

.node span {
  width: 14px;
  height: 14px;
  border-radius: 50%;
  background: var(--green);
}

.node small {
  color: var(--muted);
}

.origin {
  left: 6%;
  top: 56%;
}

.hub {
  left: 32%;
  top: 38%;
}

.fleet {
  left: 57%;
  top: 46%;
}

.store {
  right: 6%;
  top: 24%;
}

.risk-strip small,
.risk-strip strong {
  display: block;
}

.risk-strip small {
  color: var(--muted);
}

.risk-strip strong {
  margin-top: 4px;
  font-size: 24px;
}

.section {
  max-width: 1180px;
  margin: 0 auto;
  padding: 86px 24px;
}

.section-heading {
  max-width: 760px;
  margin-bottom: 34px;
}

.section-heading h2 {
  margin-bottom: 14px;
  font-size: 36px;
  line-height: 1.22;
}

.section-heading p:last-child {
  color: var(--muted);
}

.chain-flow,
.capability-grid,
.scene-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 14px;
}

.chain-flow article,
.capability-grid article,
.scene-grid article,
.score-board,
.contact-band {
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--white);
}

.chain-flow article,
.capability-grid article,
.scene-grid article {
  padding: 22px;
}

.chain-flow span {
  display: inline-flex;
  margin-bottom: 38px;
  color: var(--gold);
  font-weight: 700;
}

.chain-flow h3,
.capability-grid h3,
.scene-grid h3 {
  margin-bottom: 10px;
  font-size: 19px;
}

.chain-flow p,
.capability-grid p,
.scene-grid p,
.platform-copy p {
  color: var(--muted);
}

.capability-grid {
  grid-template-columns: repeat(3, 1fr);
}

.platform-section {
  max-width: none;
  background: #eef3f1;
}

.platform-section > * {
  max-width: 1180px;
  margin-left: auto;
  margin-right: auto;
}

.platform-layout {
  display: grid;
  grid-template-columns: 1fr 0.92fr;
  gap: 28px;
}

.platform-copy {
  padding-right: 18px;
}

.check-list {
  display: grid;
  gap: 12px;
  margin: 28px 0 0;
  padding: 0;
  list-style: none;
}

.check-list li {
  position: relative;
  padding-left: 28px;
}

.check-list li::before {
  position: absolute;
  left: 0;
  top: 8px;
  width: 12px;
  height: 12px;
  border-radius: 3px;
  background: var(--green);
  content: "";
}

.score-board {
  padding: 24px;
}

.score-row {
  display: grid;
  grid-template-columns: 96px 1fr 42px;
  align-items: center;
  gap: 14px;
  padding: 12px 0;
  border-bottom: 1px solid var(--line);
}

meter {
  width: 100%;
  height: 12px;
}

.dispatch-note {
  margin-top: 22px;
  padding: 18px;
  border-left: 4px solid var(--gold);
  background: #fbf7ed;
}

.dispatch-note small {
  color: var(--gold);
  font-weight: 700;
}

.dispatch-note p {
  margin: 8px 0 0;
}

.contact-section {
  padding-top: 40px;
}

.contact-band {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  padding: 30px;
}

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

.contact-band p:last-child {
  margin-bottom: 0;
  color: var(--muted);
}

.footer {
  display: flex;
  justify-content: space-between;
  gap: 20px;
  max-width: 1180px;
  margin: 0 auto;
  padding: 28px 24px 44px;
  color: var(--muted);
  font-size: 14px;
}

.footer p {
  margin: 0;
}

@media (max-width: 900px) {
  .nav {
    align-items: flex-start;
    flex-direction: column;
  }

  .nav-links {
    flex-wrap: wrap;
  }

  .hero,
  .platform-layout {
    grid-template-columns: 1fr;
  }

  h1 {
    font-size: 40px;
  }

  .control-visual {
    min-width: 0;
  }

  .chain-flow,
  .capability-grid,
  .scene-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 620px) {
  .site-header {
    min-height: auto;
  }

  .hero {
    padding-bottom: 52px;
  }

  h1 {
    font-size: 34px;
  }

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

  .visual-top,
  .risk-strip,
  .chain-flow,
  .capability-grid,
  .scene-grid {
    grid-template-columns: 1fr;
  }

  .route-map {
    height: 500px;
  }

  .route-line {
    top: 14%;
    left: 50%;
    width: 4px;
    height: 72%;
    background: linear-gradient(var(--green), var(--teal), var(--gold));
    transform: none;
  }

  .node {
    left: 50%;
    right: auto;
    transform: translateX(-50%);
  }

  .origin {
    top: 5%;
  }

  .hub {
    top: 29%;
  }

  .fleet {
    top: 53%;
  }

  .store {
    top: 77%;
  }

  .score-row {
    grid-template-columns: 1fr;
  }

  .contact-band,
  .contact-actions,
  .footer {
    align-items: flex-start;
    flex-direction: column;
  }
}