:root {
  --ink: #182329;
  --muted: #61717a;
  --line: #dce5e7;
  --paper: #ffffff;
  --soft: #f4f8f8;
  --soft-2: #e8f1f1;
  --steel: #2f4550;
  --teal: #1f8f8c;
  --teal-dark: #126a69;
  --amber: #c58a2b;
  --shadow: 0 20px 60px rgba(24, 35, 41, 0.12);
  --radius: 8px;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  color: var(--ink);
  background: var(--paper);
  font-family: Arial, Helvetica, sans-serif;
  line-height: 1.55;
}

img {
  display: block;
  width: 100%;
}

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

.container {
  width: min(1180px, calc(100% - 40px));
  margin: 0 auto;
}

.top-strip {
  background: var(--steel);
  color: rgba(255, 255, 255, 0.88);
  font-size: 13px;
}

.top-strip__inner {
  display: flex;
  justify-content: space-between;
  gap: 18px;
  padding: 8px 0;
}

.nav {
  position: sticky;
  top: 0;
  z-index: 20;
  background: rgba(255, 255, 255, 0.94);
  border-bottom: 1px solid var(--line);
  backdrop-filter: blur(16px);
}

.nav__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  min-height: 76px;
  gap: 24px;
}

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

.brand__mark {
  display: grid;
  width: 44px;
  height: 44px;
  place-items: center;
  color: white;
  background: linear-gradient(135deg, var(--teal), var(--steel));
  border: 1px solid rgba(255, 255, 255, 0.5);
  border-radius: var(--radius);
  font-weight: 800;
}

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

.brand strong {
  font-size: 18px;
  letter-spacing: 0;
}

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

.nav__menu {
  display: flex;
  align-items: center;
  gap: 20px;
  font-size: 15px;
  font-weight: 700;
}

.nav__menu > a:not(.button) {
  color: var(--steel);
}

.nav__menu > a:not(.button):hover {
  color: var(--teal-dark);
}

.nav-toggle {
  display: none;
  width: 42px;
  height: 42px;
  padding: 10px;
  background: var(--soft);
  border: 1px solid var(--line);
  border-radius: var(--radius);
}

.nav-toggle span {
  display: block;
  height: 2px;
  margin: 5px 0;
  background: var(--ink);
}

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 48px;
  padding: 0 22px;
  color: white;
  background: var(--teal-dark);
  border: 1px solid var(--teal-dark);
  border-radius: var(--radius);
  font-weight: 800;
  cursor: pointer;
}

.button:hover {
  background: #0e5554;
  border-color: #0e5554;
}

.button--ghost {
  color: white;
  background: rgba(255, 255, 255, 0.1);
  border-color: rgba(255, 255, 255, 0.72);
}

.button--small {
  min-height: 40px;
  padding: 0 16px;
}

.hero {
  position: relative;
  min-height: 690px;
  color: white;
  isolation: isolate;
}

.hero__image {
  position: absolute;
  inset: 0;
  z-index: -2;
  background:
    linear-gradient(90deg, rgba(11, 23, 30, 0.88), rgba(11, 23, 30, 0.62) 45%, rgba(11, 23, 30, 0.18)),
    url("https://images.unsplash.com/photo-1511818966892-d7d671e672a2?auto=format&fit=crop&w=1800&q=82") center / cover;
}

.hero__image::after {
  position: absolute;
  inset: auto 0 0;
  height: 160px;
  content: "";
  background: linear-gradient(180deg, rgba(255, 255, 255, 0), var(--paper));
}

.hero__content {
  display: grid;
  align-content: center;
  min-height: 690px;
  max-width: 1180px;
  padding: 96px 0 130px;
}

.eyebrow {
  margin: 0 0 12px;
  color: var(--teal);
  font-size: 13px;
  font-weight: 900;
  letter-spacing: 0;
  text-transform: uppercase;
}

.hero .eyebrow {
  color: #83dfdc;
}

h1,
h2,
h3,
p {
  overflow-wrap: anywhere;
}

h1,
h2,
h3 {
  margin: 0;
  line-height: 1.08;
  letter-spacing: 0;
}

h1 {
  max-width: 820px;
  font-size: clamp(42px, 7vw, 78px);
}

h2 {
  font-size: clamp(30px, 4.5vw, 50px);
}

h3 {
  font-size: 22px;
}

.hero__lead {
  max-width: 760px;
  margin: 24px 0 0;
  color: rgba(255, 255, 255, 0.9);
  font-size: 19px;
}

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

.hero__stats {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 1px;
  width: min(760px, 100%);
  margin: 52px 0 0;
  background: rgba(255, 255, 255, 0.26);
  border: 1px solid rgba(255, 255, 255, 0.28);
  border-radius: var(--radius);
  overflow: hidden;
}

.hero__stats div {
  padding: 20px;
  background: rgba(12, 30, 38, 0.66);
}

.hero__stats dt {
  margin: 0;
  color: #ffffff;
  font-size: 28px;
  font-weight: 900;
}

.hero__stats dd {
  margin: 2px 0 0;
  color: rgba(255, 255, 255, 0.82);
  font-size: 14px;
}

.section {
  padding: 92px 0;
}

.section--compact {
  padding: 72px 0;
}

.section--intro {
  padding-top: 36px;
}

.section--band {
  background: var(--soft);
}

.section-heading {
  max-width: 820px;
  margin-bottom: 36px;
}

.section-heading p:not(.eyebrow) {
  max-width: 720px;
  margin: 18px 0 0;
  color: var(--muted);
  font-size: 17px;
}

.section-heading--split {
  display: grid;
  grid-template-columns: minmax(0, 1.1fr) minmax(260px, 0.65fr);
  align-items: end;
  gap: 32px;
  max-width: none;
}

.intro-grid,
.about-layout,
.resources-layout,
.quote-layout {
  display: grid;
  grid-template-columns: minmax(0, 0.9fr) minmax(0, 1.1fr);
  gap: 58px;
  align-items: start;
}

.intro-copy p,
.about-layout p,
.resources-layout p,
.quote-copy p,
.quality-content p {
  color: var(--muted);
  font-size: 17px;
}

.product-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 22px;
}

.product-card,
.case-card {
  background: white;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  overflow: hidden;
  box-shadow: 0 12px 36px rgba(24, 35, 41, 0.07);
}

.product-card img {
  aspect-ratio: 1.35 / 1;
  object-fit: cover;
}

.product-card div,
.case-card div {
  padding: 22px;
}

.product-card span {
  display: block;
  margin-bottom: 8px;
  color: var(--amber);
  font-size: 12px;
  font-weight: 900;
  text-transform: uppercase;
}

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

.product-card a {
  color: var(--teal-dark);
  font-weight: 900;
}

.product-hero {
  padding: 64px 0 72px;
  background: linear-gradient(180deg, var(--soft), white);
}

.product-hero__layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(320px, 0.72fr);
  gap: 46px;
  align-items: center;
}

.breadcrumb {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  align-items: center;
  margin-bottom: 28px;
  color: var(--muted);
  font-size: 14px;
  font-weight: 800;
}

.breadcrumb a {
  color: var(--teal-dark);
}

.product-hero__lead {
  max-width: 760px;
  margin: 22px 0 0;
  color: var(--muted);
  font-size: 18px;
}

.product-hero__lead--zh {
  margin-top: 12px;
}

.product-hero__media img {
  height: 430px;
  object-fit: cover;
  border-radius: var(--radius);
  box-shadow: var(--shadow);
}

.product-hero__ghost {
  color: var(--teal-dark);
  background: transparent;
  border-color: var(--teal-dark);
}

.product-hero__ghost:hover {
  color: white;
}

.variant-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 16px;
}

.variant-card {
  min-height: 148px;
  padding: 22px;
  background: white;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  box-shadow: 0 10px 28px rgba(24, 35, 41, 0.06);
}

.variant-card span,
.variant-card strong {
  display: block;
}

.variant-card span {
  color: var(--amber);
  font-size: 12px;
  font-weight: 900;
  text-transform: uppercase;
}

.variant-card strong {
  margin-top: 8px;
  font-size: 21px;
}

.variant-card p {
  margin: 12px 0 0;
  color: var(--muted);
  font-size: 15px;
}

.product-cta {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  gap: 28px;
  align-items: center;
}

.product-cta p {
  max-width: 760px;
  color: var(--muted);
  font-size: 17px;
}

.application-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 16px;
}

.application-tile {
  min-height: 150px;
  padding: 24px;
  background: white;
  border: 1px solid var(--line);
  border-radius: var(--radius);
}

.application-tile:hover {
  border-color: var(--teal);
  box-shadow: var(--shadow);
}

.application-tile strong {
  display: block;
  font-size: 20px;
}

.application-tile span {
  display: block;
  margin-top: 10px;
  color: var(--muted);
}

.quality-layout {
  display: grid;
  grid-template-columns: minmax(280px, 0.88fr) minmax(0, 1.12fr);
  gap: 48px;
  align-items: center;
}

.quality-media img {
  height: 640px;
  object-fit: cover;
  border-radius: var(--radius);
  box-shadow: var(--shadow);
}

.check-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 16px;
  margin-top: 28px;
}

.check-grid > div {
  padding: 20px;
  background: var(--soft);
  border: 1px solid var(--line);
  border-radius: var(--radius);
}

.check-grid p {
  margin-bottom: 0;
  font-size: 15px;
}

.process-list {
  display: grid;
  grid-template-columns: repeat(5, minmax(0, 1fr));
  gap: 14px;
  padding: 0;
  margin: 0;
  list-style: none;
}

.process-list li {
  min-height: 190px;
  padding: 22px;
  background: white;
  border: 1px solid var(--line);
  border-radius: var(--radius);
}

.process-list span {
  display: block;
  color: var(--teal);
  font-weight: 900;
}

.process-list strong {
  display: block;
  margin-top: 24px;
  font-size: 18px;
}

.process-list small {
  display: block;
  margin-top: 8px;
  color: var(--muted);
  font-size: 14px;
}

.case-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 22px;
}

.case-card img {
  aspect-ratio: 1.45 / 1;
  object-fit: cover;
}

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

.resource-list a {
  display: grid;
  grid-template-columns: 96px 1fr;
  gap: 18px;
  align-items: center;
  padding: 18px;
  background: var(--soft);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  font-weight: 800;
}

.resource-list span {
  color: var(--teal-dark);
  font-size: 13px;
  text-transform: uppercase;
}

.section--about {
  color: white;
  background: var(--steel);
}

.section--about .eyebrow,
.section--about p {
  color: rgba(255, 255, 255, 0.78);
}

.quote-section {
  background: linear-gradient(180deg, var(--soft), white);
}

.quote-copy ul {
  padding: 0;
  margin: 26px 0 0;
  list-style: none;
}

.quote-copy li {
  position: relative;
  margin-top: 12px;
  padding-left: 24px;
  color: var(--steel);
  font-weight: 700;
}

.quote-copy li::before {
  position: absolute;
  left: 0;
  color: var(--teal);
  content: "✓";
}

.quote-form {
  padding: 28px;
  background: white;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
}

.form-row {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 14px;
}

label {
  display: grid;
  gap: 7px;
  margin-bottom: 14px;
  color: var(--steel);
  font-size: 14px;
  font-weight: 800;
}

input,
select,
textarea {
  width: 100%;
  min-height: 46px;
  padding: 11px 12px;
  color: var(--ink);
  background: #fbfdfd;
  border: 1px solid #cbd9dc;
  border-radius: var(--radius);
  font: inherit;
}

textarea {
  resize: vertical;
}

.form-note {
  margin: 14px 0 0;
  color: var(--teal-dark);
  font-weight: 800;
}

.footer {
  padding: 58px 0 24px;
  color: rgba(255, 255, 255, 0.78);
  background: #111a1f;
}

.footer-grid {
  display: grid;
  grid-template-columns: 1.5fr repeat(3, 1fr);
  gap: 34px;
}

.footer h3 {
  margin: 0 0 14px;
  color: white;
  font-size: 16px;
}

.footer a {
  display: block;
  margin-top: 9px;
}

.brand--footer {
  color: white;
}

.brand--footer small {
  color: rgba(255, 255, 255, 0.72);
}

.footer-bottom {
  display: flex;
  justify-content: space-between;
  gap: 20px;
  padding-top: 24px;
  margin-top: 34px;
  border-top: 1px solid rgba(255, 255, 255, 0.14);
}

@media (max-width: 980px) {
  .top-strip__inner {
    flex-wrap: wrap;
    justify-content: center;
  }

  .nav-toggle {
    display: block;
  }

  .nav__menu {
    position: absolute;
    top: 76px;
    right: 20px;
    left: 20px;
    display: none;
    flex-direction: column;
    align-items: stretch;
    padding: 18px;
    background: white;
    border: 1px solid var(--line);
    border-radius: var(--radius);
    box-shadow: var(--shadow);
  }

  .nav__menu.is-open {
    display: flex;
  }

  .hero,
  .hero__content {
    min-height: 620px;
  }

  .section-heading--split,
  .intro-grid,
  .about-layout,
  .resources-layout,
  .quote-layout,
  .quality-layout {
    grid-template-columns: 1fr;
  }

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

  .product-hero__layout,
  .product-cta {
    grid-template-columns: 1fr;
  }

  .product-hero__media img {
    height: 360px;
  }

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

  .quality-media img {
    height: 420px;
  }

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

@media (max-width: 640px) {
  .container {
    width: min(100% - 28px, 1180px);
  }

  .brand strong {
    font-size: 16px;
  }

  .brand__mark {
    width: 40px;
    height: 40px;
  }

  .hero {
    min-height: 720px;
  }

  .hero__content {
    min-height: 720px;
    padding: 72px 0 110px;
  }

  .hero__stats {
    grid-template-columns: 1fr;
  }

  .section {
    padding: 66px 0;
  }

  .product-grid,
  .application-grid,
  .case-grid,
  .variant-grid,
  .process-list,
  .check-grid,
  .form-row,
  .footer-grid {
    grid-template-columns: 1fr;
  }

  .product-hero {
    padding: 46px 0 58px;
  }

  .product-hero__media img {
    height: 280px;
  }

  .application-tile {
    min-height: 126px;
  }

  .quality-media img {
    height: 310px;
  }

  .resource-list a {
    grid-template-columns: 1fr;
    gap: 6px;
  }

  .quote-form {
    padding: 20px;
  }

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