@import url("https://fonts.googleapis.com/css2?family=Archivo:wght@500;600;700;800&family=Source+Sans+3:wght@400;500;600;700&display=swap");

:root {
  --ink: #171c22;
  --muted: #657180;
  --line: #dfe5eb;
  --paper: #f7f9fb;
  --white: #ffffff;
  --orange: #f59a23;
  --orange-dark: #b96312;
  --blue: #256fbd;
  --steel: #263746;
  --shadow: 0 24px 70px rgba(23, 28, 34, 0.14);
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  color: var(--ink);
  background:
    radial-gradient(circle at top right, rgba(245, 154, 35, 0.05), transparent 28%),
    radial-gradient(circle at left top, rgba(38, 111, 189, 0.04), transparent 24%),
    #f8fafc;
  font-family: "Source Sans 3", sans-serif;
  font-size: 17px;
  line-height: 1.6;
}

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

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

.site-header {
  position: sticky;
  top: 0;
  z-index: 30;
  display: flex;
  align-items: center;
  justify-content: space-between;
  min-height: 82px;
  padding: 12px clamp(18px, 4vw, 54px);
  background: rgba(255, 255, 255, 0.94);
  border-bottom: 1px solid var(--line);
  backdrop-filter: blur(16px);
}

.brand {
  display: flex;
  align-items: center;
  gap: 14px;
  min-width: 260px;
}

.brand img {
  width: 52px;
  height: 52px;
  object-fit: contain;
}

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

.brand strong {
  font-family: "Archivo", sans-serif;
  font-size: 15px;
  line-height: 1.2;
}

.brand small {
  max-width: 300px;
  color: var(--muted);
  font-size: 13px;
  line-height: 1.25;
}

.main-nav {
  display: flex;
  align-items: center;
  gap: 4px;
}

.main-nav > a,
.nav-item > a,
.language-picker > button {
  display: inline-flex;
  align-items: center;
  min-height: 42px;
  padding: 0 13px;
  border: 0;
  background: transparent;
  color: var(--steel);
  font: 700 15px "Source Sans 3", sans-serif;
  cursor: pointer;
}

.main-nav > a:hover,
.nav-item:hover > a,
.language-picker:hover > button {
  color: var(--orange-dark);
}

.nav-item {
  position: relative;
}

.nav-item::after {
  position: absolute;
  right: 0;
  bottom: -12px;
  left: 0;
  height: 12px;
  content: "";
}

.dropdown {
  position: absolute;
  top: calc(100% + 6px);
  left: 0;
  display: grid;
  min-width: 260px;
  padding: 10px;
  background: var(--white);
  border: 1px solid var(--line);
  box-shadow: var(--shadow);
  opacity: 0;
  pointer-events: none;
  transform: translateY(8px);
  transition: opacity 180ms ease, transform 180ms ease;
}

.dropdown-right {
  right: 0;
  left: auto;
  min-width: 170px;
}

.nav-item:hover .dropdown,
.nav-item:focus-within .dropdown,
.nav-item.is-open .dropdown {
  opacity: 1;
  pointer-events: auto;
  transform: translateY(0);
}

.dropdown a,
.dropdown button {
  width: 100%;
  padding: 11px 12px;
  border: 0;
  background: transparent;
  color: var(--steel);
  font: 600 15px "Source Sans 3", sans-serif;
  text-align: left;
  cursor: pointer;
}

.dropdown a:hover,
.dropdown button:hover {
  background: var(--paper);
  color: var(--orange-dark);
}

.nav-toggle {
  display: none;
  width: 44px;
  height: 44px;
  border: 1px solid var(--line);
  background: var(--white);
}

.nav-toggle span {
  display: block;
  width: 20px;
  height: 2px;
  margin: 5px auto;
  background: var(--ink);
}

.hero {
  position: relative;
  min-height: 680px;
  display: grid;
  align-items: end;
  padding: 150px clamp(20px, 6vw, 92px) 82px;
  overflow: hidden;
}

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

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

.hero-overlay {
  background: linear-gradient(90deg, rgba(13, 18, 23, 0.88), rgba(13, 18, 23, 0.56) 48%, rgba(13, 18, 23, 0.1));
}

.hero-content {
  position: relative;
  max-width: 920px;
  color: var(--white);
}

.eyebrow {
  margin: 0 0 12px;
  color: var(--orange);
  font-family: "Archivo", sans-serif;
  font-size: 13px;
  font-weight: 800;
  letter-spacing: 0;
  text-transform: uppercase;
}

h1,
h2,
h3 {
  font-family: "Archivo", sans-serif;
  line-height: 1.08;
  letter-spacing: 0;
}

h1 {
  margin: 0 0 22px;
  font-size: clamp(38px, 5.2vw, 72px);
}

h2 {
  margin: 0 0 18px;
  font-size: clamp(28px, 3.2vw, 44px);
}

h3 {
  margin: 0 0 10px;
  font-size: 23px;
}

html[lang="zh"] h1 {
  font-size: clamp(34px, 4.2vw, 58px);
  line-height: 1.12;
}

html[lang="zh"] h2 {
  font-size: clamp(26px, 2.8vw, 40px);
}

.hero-content p:not(.eyebrow) {
  max-width: 680px;
  margin: 0 0 28px;
  color: rgba(255, 255, 255, 0.88);
  font-size: 21px;
}

.hero-actions,
.cta-band {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  align-items: center;
}

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 48px;
  padding: 0 22px;
  border: 1px solid transparent;
  font-weight: 800;
  border-radius: 4px;
}

.button.primary {
  background: var(--orange);
  color: var(--ink);
}

.button.secondary {
  border-color: rgba(255, 255, 255, 0.55);
  color: var(--white);
}

.button.ghost {
  border-color: var(--line);
  background: var(--white);
  color: var(--steel);
}

.section,
.content-section {
  padding: 84px clamp(20px, 6vw, 92px);
}

.intro-band {
  background: var(--paper);
}

.section-heading {
  max-width: 760px;
  margin-bottom: 36px;
}

.feature-grid,
.product-cards,
.cert-grid,
.spec-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 20px;
}

.feature-grid article,
.cert-grid article,
.spec-grid article,
.reasons article,
.contact-card,
.inquiry-form {
  background: var(--white);
  border: 1px solid var(--line);
  padding: 26px;
  border-radius: 6px;
}

.feature-grid span,
.reasons span {
  display: block;
  margin-bottom: 28px;
  color: var(--orange-dark);
  font: 800 14px "Archivo", sans-serif;
}

.split-section {
  display: grid;
  grid-template-columns: minmax(0, 1.1fr) minmax(320px, 0.9fr);
  align-items: center;
  gap: 44px;
  padding: 84px clamp(20px, 6vw, 92px);
}

.split-media img {
  width: 100%;
  aspect-ratio: 16 / 9;
  object-fit: cover;
  border-radius: 6px;
}

.split-copy {
  max-width: 620px;
}

.text-link {
  display: inline-flex;
  margin-top: 12px;
  color: var(--orange-dark);
  font-weight: 800;
  border-bottom: 2px solid currentColor;
}

.product-card {
  display: grid;
  align-content: start;
  gap: 14px;
  min-height: 100%;
  border: 1px solid var(--line);
  background: var(--white);
  transition: transform 180ms ease, box-shadow 180ms ease;
  border-radius: 6px;
}

.product-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow);
}

.product-card img {
  width: 100%;
  aspect-ratio: 16 / 9;
  object-fit: cover;
  border-radius: 6px 6px 0 0;
}

.product-card h3,
.product-card p {
  margin-right: 22px;
  margin-left: 22px;
}

.product-card p {
  margin-top: -8px;
  margin-bottom: 24px;
  color: var(--muted);
}

.cta-band {
  justify-content: space-between;
  margin: 0 clamp(20px, 6vw, 92px) 84px;
  padding: 34px;
  background: var(--steel);
  color: var(--white);
}

.cta-band h2 {
  max-width: 760px;
  margin-bottom: 0;
  font-size: clamp(28px, 4vw, 44px);
}

.page-hero {
  padding: 118px clamp(20px, 6vw, 92px) 70px;
  background: linear-gradient(135deg, #101820, #263746 70%, #384b5b);
  color: var(--white);
}

.page-hero.compact {
  padding-bottom: 84px;
}

.page-hero p:not(.eyebrow) {
  max-width: 800px;
  color: rgba(255, 255, 255, 0.84);
  font-size: 20px;
}

.page-hero h1,
.product-hero h1 {
  max-width: 1120px;
}

.content-grid {
  display: grid;
  grid-template-columns: minmax(340px, 0.8fr) minmax(0, 1.2fr);
  gap: 48px;
}

.market-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin: 24px 0 0;
}

.market-tags span {
  display: inline-flex;
  align-items: center;
  min-height: 36px;
  padding: 0 14px;
  border: 1px solid rgba(255, 255, 255, 0.14);
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.05);
  color: var(--white);
  font-weight: 700;
}

.tinted {
  background: var(--paper);
}

.capability-list {
  display: grid;
  gap: 16px;
}

.capability-list article {
  padding: 24px;
  background: var(--white);
  border-left: 4px solid var(--orange);
}

.wide-image-section {
  padding: 44px clamp(20px, 6vw, 92px) 0;
}

.wide-image-section img {
  width: 100%;
  max-height: 520px;
  object-fit: cover;
  border: 1px solid var(--line);
}

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

.reasons {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 20px;
}

.product-hero {
  display: grid;
  grid-template-columns: minmax(420px, 0.95fr) minmax(420px, 1.05fr);
  gap: 42px;
  align-items: center;
  padding: 92px clamp(20px, 6vw, 92px);
  background: var(--paper);
}

.product-hero > div {
  min-width: 0;
}

.product-hero img {
  width: 100%;
  aspect-ratio: 16 / 9;
  object-fit: cover;
  box-shadow: var(--shadow);
}

.product-detail h2 {
  margin-bottom: 30px;
}

.product-hero-refined {
  background: linear-gradient(135deg, #f7f9fb, #ffffff);
}

.product-hero-refined img {
  border: 1px solid var(--line);
}

.category-guide article {
  border-top: 4px solid var(--orange);
}

.catalog-teaser {
  background: var(--paper);
}

.catalog-section {
  background: var(--paper);
}

.catalog-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 22px;
  margin: 26px 0;
}

.catalog-card {
  overflow: hidden;
  background: var(--white);
  border: 1px solid var(--line);
  transition: transform 180ms ease, box-shadow 180ms ease;
  border-radius: 8px;
}

.catalog-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow);
}

.catalog-card img {
  width: 100%;
  aspect-ratio: 16 / 10;
  object-fit: cover;
  border-bottom: 1px solid var(--line);
  cursor: zoom-in;
}

.catalog-card div {
  padding: 18px 20px 22px;
}

.catalog-card h3 {
  margin-bottom: 6px;
  font-size: 19px;
}

.catalog-card .text-link {
  display: none;
}

.pagination {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  align-items: center;
}

.pagination a {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 42px;
  height: 42px;
  border: 1px solid var(--line);
  background: var(--white);
  font-weight: 800;
}

.pagination a.active {
  background: var(--steel);
  color: var(--white);
  border-color: var(--steel);
}

.contact-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(300px, 420px);
  gap: 28px;
  padding: 70px clamp(20px, 6vw, 92px) 92px;
  background: var(--paper);
}

.inquiry-form {
  display: grid;
  gap: 16px;
}

.inquiry-form label {
  display: grid;
  gap: 7px;
  font-weight: 800;
}

.inquiry-form input,
.inquiry-form select,
.inquiry-form textarea {
  width: 100%;
  border: 1px solid var(--line);
  padding: 13px 14px;
  background: var(--white);
  color: var(--ink);
  font: 500 16px "Source Sans 3", sans-serif;
}

.hidden {
  display: none;
}

.contact-card {
  align-self: start;
  background: var(--steel);
  color: var(--white);
}

.contact-card p {
  color: rgba(255, 255, 255, 0.82);
}

.site-footer {
  display: flex;
  justify-content: space-between;
  gap: 28px;
  padding: 34px clamp(20px, 6vw, 92px);
  background: #101820;
  color: var(--white);
}

.site-footer p,
.site-footer a {
  color: rgba(255, 255, 255, 0.74);
}

.site-footer a {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  margin-left: 0;
  font-weight: 700;
}

.social-links {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  justify-content: flex-end;
}

.social-links a {
  width: 44px;
  height: 44px;
  padding: 0;
  justify-content: center;
  border: 1px solid rgba(255, 255, 255, 0.18);
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.03);
}

.social-links svg {
  width: 18px;
  height: 18px;
  flex: 0 0 auto;
}

.social-links .social-link-icon {
  display: inline-flex;
  width: 18px;
  height: 18px;
}

.visually-hidden {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

.modal-open {
  overflow: hidden;
}

.product-lightbox {
  position: fixed;
  inset: 0;
  z-index: 60;
  display: grid;
  place-items: center;
  padding: 24px;
  background: rgba(8, 13, 18, 0.82);
  opacity: 0;
  pointer-events: none;
  transition: opacity 180ms ease;
}

.product-lightbox.is-open {
  opacity: 1;
  pointer-events: auto;
}

.product-lightbox-panel {
  position: relative;
  width: min(1080px, 100%);
  background: #0f1720;
  border: 1px solid rgba(255, 255, 255, 0.1);
  box-shadow: 0 30px 90px rgba(0, 0, 0, 0.42);
}

.product-lightbox-panel img {
  width: 100%;
  max-height: 78vh;
  object-fit: contain;
  background: #091017;
}

.product-lightbox-caption {
  display: flex;
  justify-content: space-between;
  gap: 16px;
  align-items: center;
  padding: 16px 20px 20px;
  color: rgba(255, 255, 255, 0.88);
}

.product-lightbox-caption p {
  margin: 0;
}

.product-lightbox-close {
  width: 44px;
  height: 44px;
  border: 1px solid rgba(255, 255, 255, 0.16);
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.06);
  color: var(--white);
  font-size: 22px;
  cursor: pointer;
}

.analytics-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 20px;
}

.analytics-grid article,
.diagnostic-form {
  padding: 26px;
  background: var(--white);
  border: 1px solid var(--line);
}

.diagnostic-form {
  display: grid;
  gap: 16px;
  max-width: 780px;
}

.diagnostic-form label {
  display: grid;
  gap: 7px;
  font-weight: 800;
}

.diagnostic-form input {
  border: 1px solid var(--line);
  padding: 13px 14px;
  font: 500 16px "Source Sans 3", sans-serif;
}

.muted-note {
  color: var(--muted);
}

.thank-you-page {
  min-height: 100vh;
  display: grid;
  place-items: center;
  background: var(--paper);
}

.thank-you {
  width: min(620px, calc(100vw - 40px));
  padding: 42px;
  background: var(--white);
  border: 1px solid var(--line);
  text-align: center;
}

.thank-you img {
  width: 82px;
  margin: 0 auto 22px;
}

@media (max-width: 980px) {
  .nav-toggle {
    display: block;
  }

  .main-nav {
    position: absolute;
    top: 82px;
    right: 18px;
    left: 18px;
    display: none;
    align-items: stretch;
    padding: 14px;
    background: var(--white);
    border: 1px solid var(--line);
    box-shadow: var(--shadow);
  }

  .main-nav.is-open {
    display: grid;
  }

  .main-nav > a,
  .nav-item > a,
  .language-picker > button {
    width: 100%;
    justify-content: space-between;
  }

  .dropdown {
    position: static;
    display: none;
    min-width: 0;
    padding: 0 0 8px 12px;
    border: 0;
    box-shadow: none;
    opacity: 1;
    pointer-events: auto;
    transform: none;
  }

  .nav-item:hover .dropdown,
  .nav-item:focus-within .dropdown,
  .nav-item.is-open .dropdown {
    display: grid;
  }

  .hero {
    min-height: 620px;
  }

  .feature-grid,
  .product-cards,
  .cert-grid,
  .spec-grid,
  .catalog-grid,
  .analytics-grid,
  .reasons,
  .split-section,
  .product-hero,
  .contact-layout,
  .content-grid {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 640px) {
  .brand {
    min-width: 0;
  }

  .brand small {
    display: none;
  }

  .brand strong {
    max-width: 210px;
  }

  .hero {
    min-height: 590px;
    padding-top: 112px;
  }

  h1 {
    font-size: 40px;
  }

  .site-footer {
    display: grid;
  }

  .site-footer a {
    margin: 0 16px 0 0;
  }
}