:root {
  --ink: #172033;
  --muted: #667085;
  --line: #d9e1ea;
  --paper: #ffffff;
  --wash: #f3f6f8;
  --teal: #0b8f90;
  --teal-dark: #075f63;
  --gold: #a36a1f;
  --plum: #673c6d;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  color: var(--ink);
  background: var(--paper);
  font: 16px/1.65 Arial, "Microsoft YaHei", sans-serif;
  letter-spacing: 0;
}

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

.site-header {
  position: fixed;
  inset: 0 0 auto;
  z-index: 10;
  height: 72px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 clamp(20px, 5vw, 72px);
  color: #fff;
  background: rgba(12, 18, 27, 0.72);
  backdrop-filter: blur(16px);
  border-bottom: 1px solid rgba(255, 255, 255, 0.16);
}

.brand,
.site-nav {
  display: flex;
  align-items: center;
}

.brand {
  gap: 12px;
  font-weight: 700;
  font-size: 20px;
}

.brand-mark {
  display: grid;
  place-items: center;
  width: 38px;
  height: 38px;
  border-radius: 8px;
  background: var(--teal);
}

.site-nav {
  gap: clamp(16px, 3vw, 34px);
  color: rgba(255, 255, 255, 0.86);
  font-size: 14px;
}

.site-nav a:hover {
  color: #fff;
}

.hero {
  position: relative;
  min-height: 82svh;
  display: flex;
  align-items: center;
  padding: 112px clamp(20px, 5vw, 72px) 88px;
  color: #fff;
  background: url("/assets/hero-operations.png") center / cover no-repeat;
}

.hero-shade {
  position: absolute;
  inset: 0;
  background:
    linear-gradient(90deg, rgba(9, 16, 24, 0.86) 0%, rgba(9, 16, 24, 0.62) 39%, rgba(9, 16, 24, 0.18) 72%, rgba(9, 16, 24, 0.24) 100%),
    linear-gradient(180deg, rgba(7, 12, 18, 0.25), rgba(7, 12, 18, 0.56));
}

.hero-content {
  position: relative;
  width: min(760px, 100%);
}

.eyebrow,
.section-kicker {
  display: block;
  margin-bottom: 14px;
  color: #7ad0cf;
  font-size: 13px;
  font-weight: 700;
  text-transform: uppercase;
}

.hero h1 {
  margin: 0;
  font-size: clamp(40px, 7vw, 82px);
  line-height: 1.05;
  letter-spacing: 0;
}

.hero-copy {
  width: min(660px, 100%);
  margin: 24px 0 0;
  color: rgba(255, 255, 255, 0.88);
  font-size: clamp(17px, 2vw, 21px);
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  margin-top: 34px;
}

.primary-link,
.secondary-link {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 46px;
  padding: 11px 20px;
  border-radius: 8px;
  font-weight: 700;
}

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

.secondary-link {
  color: #fff;
  border: 1px solid rgba(255, 255, 255, 0.58);
}

.intro-band {
  padding: 36px clamp(20px, 5vw, 72px);
  background: #111827;
  color: #fff;
}

.intro-grid {
  width: min(1180px, 100%);
  margin: 0 auto;
  display: grid;
  grid-template-columns: minmax(240px, 0.75fr) minmax(0, 1.25fr);
  gap: 36px;
  align-items: center;
}

.intro-grid h2,
.section h2,
.contact-section h2 {
  margin: 0;
  font-size: clamp(28px, 4vw, 44px);
  line-height: 1.2;
  letter-spacing: 0;
}

.intro-grid p {
  margin: 0;
  color: rgba(255, 255, 255, 0.78);
}

.proof-strip {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 1px;
  background: var(--line);
  border-bottom: 1px solid var(--line);
}

.proof-item {
  min-height: 142px;
  display: grid;
  align-content: center;
  gap: 8px;
  padding: 24px clamp(20px, 5vw, 46px);
  background: #fff;
}

.proof-item strong {
  color: var(--teal-dark);
  font-size: clamp(30px, 4vw, 46px);
  line-height: 1;
}

.proof-item span {
  color: var(--muted);
  font-weight: 700;
}

.section {
  padding: 76px clamp(20px, 5vw, 72px);
}

.section.muted {
  background: var(--wash);
}

.section-head {
  width: min(860px, 100%);
  margin-bottom: 34px;
}

.section-head p {
  margin: 14px 0 0;
  color: var(--muted);
  font-size: 17px;
}

.section-kicker {
  color: var(--teal-dark);
}

.card-grid,
.case-grid,
.solution-grid {
  width: min(1180px, 100%);
  display: grid;
  gap: 18px;
}

.card-grid.four {
  grid-template-columns: repeat(4, minmax(0, 1fr));
}

.info-card,
.case-card,
.solution-card {
  min-height: 220px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: #fff;
  padding: 24px;
}

.info-card h3,
.case-card h3,
.solution-card h3 {
  margin: 18px 0 10px;
  font-size: 20px;
}

.info-card p,
.case-card p,
.solution-card p {
  margin: 0;
  color: var(--muted);
}

.card-index,
.case-label {
  color: var(--gold);
  font-weight: 700;
}

.solution-grid {
  grid-template-columns: repeat(4, minmax(0, 1fr));
}

.solution-card {
  min-height: 250px;
}

.solution-card h3 {
  margin-top: 0;
}

.platform-strip {
  width: min(1180px, 100%);
  display: grid;
  grid-template-columns: repeat(6, minmax(0, 1fr));
  gap: 12px;
}

.platform-strip span {
  min-height: 76px;
  display: grid;
  place-items: center;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: #fff;
  font-weight: 700;
  color: #223047;
}

.case-grid {
  grid-template-columns: repeat(3, minmax(0, 1fr));
}

.case-card {
  display: grid;
  align-content: space-between;
  gap: 24px;
}

.text-link {
  color: var(--teal-dark);
  font-weight: 700;
}

.process {
  width: min(1180px, 100%);
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 14px;
}

.process div {
  min-height: 132px;
  padding: 20px;
  border-left: 4px solid var(--teal);
  background: #fff;
}

.process strong,
.process span {
  display: block;
}

.process span {
  margin-top: 8px;
  color: var(--muted);
}

.contact-section {
  margin: 0 clamp(20px, 5vw, 72px) 72px;
  padding: 40px;
  display: flex;
  justify-content: space-between;
  gap: 24px;
  align-items: center;
  border-radius: 8px;
  color: #fff;
  background: #172033;
}

.contact-section p {
  max-width: 720px;
  margin: 14px 0 0;
  color: rgba(255, 255, 255, 0.78);
}

.site-footer {
  min-height: 72px;
  display: flex;
  justify-content: space-between;
  gap: 20px;
  padding: 24px clamp(20px, 5vw, 72px);
  color: var(--muted);
  border-top: 1px solid var(--line);
}

@media (max-width: 980px) {
  .site-header {
    position: absolute;
  }

  .site-nav {
    display: none;
  }

  .intro-grid,
  .proof-strip,
  .card-grid.four,
  .solution-grid,
  .platform-strip,
  .case-grid,
  .process {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (max-width: 680px) {
  .hero {
    min-height: 78svh;
    padding-top: 104px;
  }

  .intro-grid,
  .proof-strip,
  .card-grid.four,
  .solution-grid,
  .platform-strip,
  .case-grid,
  .process {
    grid-template-columns: 1fr;
  }

  .contact-section,
  .site-footer {
    flex-direction: column;
    align-items: flex-start;
  }

  .contact-section {
    padding: 28px;
  }
}