:root {
  color-scheme: light;
  --ink: #17211d;
  --muted: #5f6d66;
  --line: #d7dfdb;
  --paper: #f7f9f8;
  --surface: #ffffff;
  --green: #2d6f55;
  --teal: #0f8d83;
  --gold: #c18a3b;
  --blue: #345d9d;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font-family:
    Inter, "PingFang SC", "Microsoft YaHei", "Noto Sans CJK SC", Arial,
    sans-serif;
  line-height: 1.6;
}

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

.site-header {
  position: sticky;
  top: 0;
  z-index: 10;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  padding: 18px clamp(20px, 5vw, 72px);
  background: rgba(247, 249, 248, 0.9);
  border-bottom: 1px solid rgba(215, 223, 219, 0.78);
  backdrop-filter: blur(18px);
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  min-width: 220px;
}

.brand-mark {
  display: grid;
  width: 42px;
  height: 42px;
  place-items: center;
  border-radius: 8px;
  background: var(--ink);
  color: #fff;
  font-weight: 800;
}

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

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

.site-nav {
  display: flex;
  flex-wrap: wrap;
  justify-content: flex-end;
  gap: 8px;
}

.site-nav a {
  padding: 8px 12px;
  border-radius: 6px;
  color: var(--muted);
  font-size: 14px;
}

.site-nav a:hover,
.site-nav a:focus-visible {
  background: #e7eeeb;
  color: var(--ink);
}

.hero-section {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(300px, 0.72fr);
  gap: clamp(28px, 5vw, 72px);
  min-height: calc(100vh - 80px);
  padding: clamp(56px, 8vw, 112px) clamp(20px, 5vw, 72px) 48px;
  border-bottom: 1px solid var(--line);
}

.hero-copy {
  align-self: center;
  max-width: 780px;
}

.eyebrow,
.section-kicker {
  margin: 0 0 12px;
  color: var(--teal);
  font-size: 13px;
  font-weight: 800;
  letter-spacing: 0;
  text-transform: uppercase;
}

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

h1 {
  max-width: 900px;
  margin-bottom: 22px;
  font-size: clamp(42px, 7vw, 86px);
  line-height: 1.05;
}

h2 {
  margin-bottom: 16px;
  font-size: clamp(28px, 4vw, 46px);
  line-height: 1.12;
}

h3 {
  margin-bottom: 10px;
  font-size: 22px;
}

.hero-lead {
  max-width: 680px;
  margin-bottom: 32px;
  color: var(--muted);
  font-size: clamp(17px, 2vw, 21px);
}

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

.primary-link,
.secondary-link {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 46px;
  padding: 0 18px;
  border-radius: 7px;
  font-weight: 700;
}

.primary-link {
  background: var(--ink);
  color: #fff;
}

.primary-link.dark {
  background: #fff;
  color: var(--ink);
}

.secondary-link {
  border: 1px solid var(--line);
  color: var(--ink);
}

.hero-visual {
  position: relative;
  min-height: 420px;
  align-self: stretch;
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: 8px;
  background:
    linear-gradient(135deg, rgba(45, 111, 85, 0.16), transparent 42%),
    linear-gradient(315deg, rgba(52, 93, 157, 0.16), transparent 48%),
    #ffffff;
}

.hero-visual img {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.orbital-grid {
  position: relative;
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1px;
  height: 100%;
  background: rgba(215, 223, 219, 0.34);
}

.orbital-grid span {
  min-height: 120px;
  background: rgba(255, 255, 255, 0.1);
}

.orbital-grid span:nth-child(3n) {
  background: rgba(255, 255, 255, 0.2);
}

.signal-panel {
  position: absolute;
  right: 24px;
  bottom: 24px;
  left: 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 18px;
  padding: 18px;
  border-radius: 8px;
  background: rgba(23, 33, 29, 0.92);
  color: #fff;
}

.signal-panel small {
  color: #d9e2de;
}

.section-block {
  padding: clamp(54px, 7vw, 92px) clamp(20px, 5vw, 72px);
}

.intro-band,
.split-section {
  display: grid;
  grid-template-columns: minmax(220px, 0.6fr) minmax(0, 1fr);
  gap: clamp(24px, 5vw, 80px);
  border-bottom: 1px solid var(--line);
}

.intro-band p:last-child,
.split-section p {
  color: var(--muted);
  font-size: 18px;
}

.section-heading {
  max-width: 720px;
  margin-bottom: 28px;
}

.service-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 14px;
}

.service-grid article {
  min-height: 250px;
  padding: 24px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--surface);
}

.service-grid span {
  display: inline-block;
  margin-bottom: 42px;
  color: var(--gold);
  font-weight: 800;
}

.service-grid p,
.process-list span {
  color: var(--muted);
}

.solution-list {
  display: grid;
  gap: 12px;
}

.solution-list div {
  padding: 20px 0;
  border-top: 1px solid var(--line);
}

.solution-list strong {
  display: block;
  margin-bottom: 8px;
  font-size: 20px;
}

.process-list {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 14px;
  padding: 0;
  list-style: none;
}

.process-list li {
  display: grid;
  gap: 10px;
  min-height: 150px;
  padding: 22px;
  border-top: 4px solid var(--green);
  background: #fff;
}

.contact-band {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 28px;
  padding: clamp(46px, 7vw, 84px) clamp(20px, 5vw, 72px);
  background: var(--ink);
  color: #fff;
}

.contact-band p {
  max-width: 740px;
  color: #d9e2de;
}

.site-footer {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: center;
  gap: 12px;
  padding: 22px clamp(20px, 5vw, 72px);
  text-align: center;
  color: var(--muted);
  background: #fff;
  border-top: 1px solid var(--line);
  font-size: 14px;
}

.site-footer a {
  color: var(--blue);
}

.site-footer a:hover,
.site-footer a:focus-visible {
  text-decoration: underline;
}

@media (max-width: 980px) {
  .hero-section,
  .intro-band,
  .split-section {
    grid-template-columns: 1fr;
  }

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

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

@media (max-width: 640px) {
  .site-header {
    align-items: flex-start;
    flex-direction: column;
  }

  .site-nav {
    justify-content: flex-start;
  }

  .hero-visual {
    min-height: 300px;
  }

  .service-grid,
  .process-list {
    grid-template-columns: 1fr;
  }

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