:root {
  --ink: #10202a;
  --muted: #52636b;
  --line: #dce4e5;
  --paper: #f7faf9;
  --white: #ffffff;
  --teal: #007c78;
  --teal-dark: #035c5b;
  --amber: #b87333;
  --steel: #5f7884;
  --shadow: 0 18px 50px rgba(16, 32, 42, 0.13);
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  color: var(--ink);
  font-family:
    Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI",
    "PingFang SC", "Microsoft YaHei", sans-serif;
  background: var(--paper);
  line-height: 1.6;
}

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

.site-header {
  position: fixed;
  z-index: 20;
  top: 0;
  left: 0;
  right: 0;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  padding: 18px clamp(18px, 5vw, 64px);
  color: var(--white);
  transition:
    background 180ms ease,
    color 180ms ease,
    box-shadow 180ms ease;
}

.site-header.is-solid {
  color: var(--ink);
  background: rgba(255, 255, 255, 0.94);
  box-shadow: 0 8px 30px rgba(16, 32, 42, 0.08);
  backdrop-filter: blur(14px);
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 11px;
  min-width: 190px;
}

.brand-mark {
  display: grid;
  width: 38px;
  height: 38px;
  place-items: center;
  border-radius: 8px;
  background: var(--teal);
  color: var(--white);
  font-weight: 800;
}

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

.brand small {
  color: currentColor;
  font-size: 11px;
  opacity: 0.72;
}

.site-nav {
  display: flex;
  gap: clamp(16px, 3vw, 34px);
  font-size: 14px;
}

.site-nav a,
.header-action {
  min-height: 38px;
  display: inline-flex;
  align-items: center;
}

.header-action {
  justify-content: center;
  padding: 0 16px;
  border: 1px solid currentColor;
  border-radius: 6px;
  font-size: 14px;
}

.hero {
  position: relative;
  min-height: 92vh;
  display: flex;
  align-items: center;
  overflow: hidden;
  background: #14232a;
}

.hero-image,
.hero-overlay {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
}

.hero-image {
  object-fit: cover;
}

.hero-overlay {
  background:
    linear-gradient(90deg, rgba(7, 27, 33, 0.82) 0%, rgba(7, 27, 33, 0.58) 39%, rgba(7, 27, 33, 0.04) 82%),
    linear-gradient(0deg, rgba(7, 27, 33, 0.24), rgba(7, 27, 33, 0.18));
}

.hero-content {
  position: relative;
  z-index: 1;
  width: min(680px, calc(100% - 36px));
  margin-left: clamp(18px, 7vw, 88px);
  padding-top: 78px;
  color: var(--white);
}

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

.hero .eyebrow {
  color: #72ddd6;
}

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

h1 {
  max-width: 660px;
  margin-bottom: 20px;
  font-size: clamp(40px, 6vw, 76px);
  line-height: 1.04;
  letter-spacing: 0;
}

h2 {
  margin-bottom: 18px;
  font-size: clamp(28px, 4vw, 46px);
  line-height: 1.15;
  letter-spacing: 0;
}

h3 {
  margin-bottom: 10px;
  font-size: 21px;
  line-height: 1.25;
}

.hero-copy {
  max-width: 620px;
  color: rgba(255, 255, 255, 0.86);
  font-size: 18px;
}

.hero-actions,
.trust-row {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  align-items: center;
}

.primary-button,
.secondary-button,
.quote-form button {
  min-height: 48px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border-radius: 6px;
  font-weight: 750;
}

.primary-button,
.quote-form button {
  padding: 0 22px;
  border: 0;
  background: var(--teal);
  color: var(--white);
}

.secondary-button {
  padding: 0 22px;
  border: 1px solid rgba(255, 255, 255, 0.62);
  color: var(--white);
}

.trust-row {
  margin-top: 30px;
  color: rgba(255, 255, 255, 0.82);
  font-size: 14px;
}

.trust-row span {
  padding-left: 14px;
  border-left: 3px solid #72ddd6;
}

.section {
  padding: clamp(62px, 8vw, 110px) clamp(18px, 5vw, 72px);
}

.intro-band {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 1px;
  padding-top: 0;
  padding-bottom: 0;
  background: var(--line);
}

.metric {
  min-height: 128px;
  display: flex;
  flex-direction: column;
  justify-content: center;
  background: var(--white);
  padding: 28px;
}

.metric strong {
  color: var(--amber);
  font-size: 34px;
  line-height: 1;
}

.metric span {
  margin-top: 9px;
  color: var(--muted);
}

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

.product-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 18px;
}

.product-card {
  min-height: 318px;
  display: flex;
  flex-direction: column;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--white);
  padding: 24px;
  box-shadow: 0 10px 30px rgba(16, 32, 42, 0.05);
}

.product-icon {
  width: 46px;
  height: 46px;
  display: grid;
  place-items: center;
  margin-bottom: 32px;
  border-radius: 50%;
  background: #e5f4f1;
  color: var(--teal-dark);
  font-weight: 800;
}

.product-card p {
  color: var(--muted);
}

.product-card a {
  width: max-content;
  margin-top: auto;
  color: var(--teal-dark);
  font-weight: 800;
}

.split-section {
  display: grid;
  grid-template-columns: minmax(0, 0.88fr) minmax(0, 1.12fr);
  gap: clamp(34px, 7vw, 90px);
  align-items: start;
  background: var(--white);
}

.split-section > div:first-child p:not(.eyebrow),
.contact-copy p {
  max-width: 620px;
  color: var(--muted);
  font-size: 17px;
}

.capability-list {
  display: grid;
  gap: 1px;
  background: var(--line);
}

.capability-list div {
  background: var(--white);
  padding: 28px 0 28px 28px;
}

.capability-list span {
  display: block;
  margin-bottom: 8px;
  color: var(--teal-dark);
  font-weight: 850;
}

.capability-list p {
  margin-bottom: 0;
  color: var(--muted);
}

.process-band {
  background: #eef4f3;
}

.steps {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 18px;
}

.steps div {
  min-height: 184px;
  border-top: 4px solid var(--teal);
  background: rgba(255, 255, 255, 0.66);
  padding: 22px;
}

.steps strong {
  display: block;
  margin-bottom: 12px;
  font-size: 18px;
}

.steps p {
  margin-bottom: 0;
  color: var(--muted);
}

.contact-section {
  display: grid;
  grid-template-columns: minmax(0, 0.9fr) minmax(320px, 0.7fr);
  gap: clamp(34px, 7vw, 86px);
  background: var(--ink);
  color: var(--white);
}

.contact-lines {
  display: grid;
  gap: 10px;
  margin-top: 30px;
  color: rgba(255, 255, 255, 0.82);
}

.quote-form {
  display: grid;
  gap: 16px;
  border-radius: 8px;
  background: var(--white);
  padding: 26px;
  color: var(--ink);
  box-shadow: var(--shadow);
}

.quote-form label {
  display: grid;
  gap: 7px;
  color: var(--muted);
  font-size: 14px;
  font-weight: 750;
}

.quote-form input,
.quote-form select,
.quote-form textarea {
  width: 100%;
  border: 1px solid var(--line);
  border-radius: 6px;
  padding: 12px 13px;
  color: var(--ink);
  font: inherit;
}

.quote-form textarea {
  resize: vertical;
}

.quote-form button {
  width: 100%;
  cursor: pointer;
  font: inherit;
}

.form-note {
  margin-bottom: 0;
  color: var(--muted);
  font-size: 13px;
}

.site-footer {
  display: flex;
  justify-content: space-between;
  gap: 18px;
  padding: 26px clamp(18px, 5vw, 72px);
  color: var(--muted);
  background: var(--white);
  font-size: 14px;
}

@media (max-width: 980px) {
  .site-nav {
    display: none;
  }

  .product-grid,
  .steps {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .split-section,
  .contact-section {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 680px) {
  .site-header {
    padding: 12px 16px;
  }

  .brand {
    min-width: 0;
  }

  .brand small,
  .header-action {
    display: none;
  }

  .hero {
    min-height: 88vh;
  }

  .hero-overlay {
    background:
      linear-gradient(90deg, rgba(7, 27, 33, 0.86) 0%, rgba(7, 27, 33, 0.56) 100%),
      linear-gradient(0deg, rgba(7, 27, 33, 0.24), rgba(7, 27, 33, 0.18));
  }

  .hero-content {
    margin: 0 auto;
  }

  h1 {
    font-size: 39px;
  }

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

  .intro-band,
  .product-grid,
  .steps {
    grid-template-columns: 1fr;
  }

  .product-card,
  .steps div {
    min-height: auto;
  }

  .site-footer {
    flex-direction: column;
  }
}