:root {
  color-scheme: light;
  --seo-ink: #11161a;
  --seo-muted: #65717d;
  --seo-line: #dce5eb;
  --seo-paper: #ffffff;
  --seo-wash: #f4f7f9;
  --seo-graphite: #111820;
  --seo-cyan: #12b8c8;
  --seo-cyan-dark: #087f8e;
  --seo-green: #3f9d72;
  --seo-radius: 8px;
  --seo-shadow: 0 18px 48px rgba(17, 24, 32, 0.1);
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  background: var(--seo-wash);
  color: var(--seo-ink);
  font-family: Arial, "PingFang SC", "Microsoft YaHei", sans-serif;
  letter-spacing: 0;
}

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

img {
  max-width: 100%;
}

.seo-shell {
  width: min(1180px, calc(100% - 48px));
  margin: 0 auto;
}

.seo-header {
  position: sticky;
  top: 0;
  z-index: 20;
  background: rgba(255, 255, 255, 0.94);
  border-bottom: 1px solid rgba(220, 229, 235, 0.92);
  backdrop-filter: blur(18px);
}

.seo-header-inner {
  min-height: 72px;
  display: grid;
  grid-template-columns: minmax(260px, 340px) minmax(0, 1fr) auto;
  align-items: center;
  gap: 22px;
}

.seo-brand {
  min-width: 0;
  display: flex;
  align-items: center;
  gap: 10px;
}

.seo-brand img {
  width: 88px;
  height: 48px;
  flex: 0 0 auto;
  object-fit: contain;
}

.seo-brand span,
.seo-brand strong,
.seo-brand small {
  min-width: 0;
  display: block;
}

.seo-brand strong {
  font-size: 13px;
  line-height: 1.35;
}

.seo-brand small {
  margin-top: 3px;
  color: var(--seo-muted);
  font-size: 9px;
  line-height: 1.25;
}

.seo-nav {
  min-width: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 19px;
  overflow-x: auto;
  color: #2b353d;
  font-size: 13px;
  scrollbar-width: none;
  white-space: nowrap;
}

.seo-nav::-webkit-scrollbar {
  display: none;
}

.seo-nav a {
  flex: 0 0 auto;
  padding: 10px 0;
}

.seo-nav a:hover,
.seo-nav a:focus-visible {
  color: var(--seo-cyan-dark);
}

.seo-nav .seo-nav-sell {
  color: #31775e;
  font-weight: 700;
}

.language-link {
  min-width: 48px;
  padding: 8px 10px;
  border: 1px solid var(--seo-line);
  border-radius: 6px;
  color: #25313a;
  font-size: 12px;
  font-weight: 700;
  text-align: center;
}

.language-link:hover,
.language-link:focus-visible {
  border-color: var(--seo-cyan-dark);
  color: var(--seo-cyan-dark);
}

.breadcrumbs {
  min-height: 24px;
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 8px;
  color: var(--seo-muted);
  font-size: 12px;
}

.breadcrumbs a:hover,
.breadcrumbs a:focus-visible {
  color: var(--seo-cyan-dark);
}

.breadcrumbs a[aria-current="page"] {
  color: #2c3942;
}

.seo-eyebrow {
  margin: 0 0 12px;
  color: var(--seo-cyan-dark);
  font-size: 12px;
  font-weight: 800;
  line-height: 1.4;
  text-transform: uppercase;
}

.product-hero {
  padding: 28px 0 72px;
  background: var(--seo-paper);
}

.product-layout {
  display: grid;
  grid-template-columns: minmax(0, 0.92fr) minmax(0, 1.08fr);
  align-items: center;
  gap: 70px;
  margin-top: 34px;
}

.product-media {
  min-width: 0;
  margin: 0;
  padding: 24px;
  border: 1px solid var(--seo-line);
  border-radius: var(--seo-radius);
  background: #f8fafb;
}

.product-media img {
  display: block;
  width: 100%;
  aspect-ratio: 4 / 3;
  object-fit: contain;
  background: #fff;
}

.product-media figcaption {
  margin-top: 14px;
  color: var(--seo-muted);
  font-size: 11px;
  line-height: 1.5;
  text-align: center;
}

.product-summary {
  min-width: 0;
}

.product-summary h1 {
  max-width: 760px;
  margin: 0;
  font-size: 42px;
  line-height: 1.12;
  overflow-wrap: anywhere;
}

.product-family {
  margin: 14px 0 0;
  color: #33414a;
  font-size: 18px;
  font-weight: 700;
  line-height: 1.45;
}

.product-description {
  max-width: 720px;
  margin: 22px 0 0;
  color: var(--seo-muted);
  font-size: 15px;
  line-height: 1.75;
}

.key-facts {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 0;
  margin: 28px 0 0;
  border-top: 1px solid var(--seo-line);
  border-bottom: 1px solid var(--seo-line);
}

.key-facts div {
  min-width: 0;
  padding: 15px 18px 15px 0;
}

.key-facts div:nth-child(even) {
  padding-left: 18px;
  border-left: 1px solid var(--seo-line);
}

.key-facts div:nth-child(n + 3) {
  border-top: 1px solid var(--seo-line);
}

.key-facts dt {
  color: var(--seo-muted);
  font-size: 11px;
  line-height: 1.4;
}

.key-facts dd {
  margin: 6px 0 0;
  font-size: 14px;
  font-weight: 700;
  line-height: 1.45;
  overflow-wrap: anywhere;
}

.product-actions {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 28px;
}

.seo-primary-action,
.seo-secondary-action {
  min-height: 44px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0 18px;
  border: 1px solid transparent;
  border-radius: 6px;
  font-size: 13px;
  font-weight: 700;
  line-height: 1.35;
  text-align: center;
}

.seo-primary-action {
  background: var(--seo-graphite);
  color: #fff;
}

.seo-primary-action:hover,
.seo-primary-action:focus-visible {
  background: var(--seo-cyan-dark);
}

.seo-secondary-action {
  border-color: var(--seo-line);
  background: #fff;
  color: #2b3840;
}

.seo-secondary-action:hover,
.seo-secondary-action:focus-visible {
  border-color: var(--seo-cyan-dark);
  color: var(--seo-cyan-dark);
}

.seo-secondary-action.light {
  border-color: rgba(255, 255, 255, 0.5);
  background: transparent;
  color: #fff;
}

.specification-band {
  padding: 76px 0;
  background: var(--seo-wash);
}

.spec-layout {
  display: grid;
  grid-template-columns: minmax(230px, 0.7fr) minmax(0, 1.3fr);
  align-items: start;
  gap: 72px;
}

.section-heading h2 {
  margin: 0;
  font-size: 30px;
  line-height: 1.2;
}

.section-heading > p:last-child {
  max-width: 430px;
  margin: 18px 0 0;
  color: var(--seo-muted);
  font-size: 14px;
  line-height: 1.75;
}

.static-spec-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  margin: 0;
  border-top: 1px solid #cfd9df;
}

.static-spec-grid div {
  min-width: 0;
  padding: 15px 18px 15px 0;
  border-bottom: 1px solid #cfd9df;
}

.static-spec-grid div:nth-child(even) {
  padding-left: 18px;
  border-left: 1px solid #cfd9df;
}

.static-spec-grid dt {
  color: var(--seo-muted);
  font-size: 11px;
  line-height: 1.4;
}

.static-spec-grid dd {
  margin: 6px 0 0;
  font-size: 13px;
  font-weight: 700;
  line-height: 1.5;
  overflow-wrap: anywhere;
}

.related-band {
  padding: 76px 0 86px;
  background: #fff;
}

.related-heading {
  margin-bottom: 28px;
}

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

.related-card {
  min-width: 0;
  border: 1px solid var(--seo-line);
  border-radius: var(--seo-radius);
  background: #fff;
}

.related-card a {
  min-height: 210px;
  display: flex;
  flex-direction: column;
  padding: 20px;
}

.related-card:hover,
.related-card:focus-within {
  border-color: #9dccd2;
  box-shadow: 0 12px 30px rgba(17, 24, 32, 0.08);
}

.related-card span {
  color: var(--seo-cyan-dark);
  font-size: 10px;
  font-weight: 800;
  text-transform: uppercase;
}

.related-card strong {
  margin-top: 15px;
  font-size: 17px;
  line-height: 1.35;
  overflow-wrap: anywhere;
}

.related-card small {
  margin-top: 8px;
  color: var(--seo-muted);
  font-size: 12px;
  line-height: 1.45;
}

.related-card div {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  margin-top: auto;
  padding-top: 20px;
}

.related-card em,
.catalog-chips em {
  min-height: 24px;
  display: inline-flex;
  align-items: center;
  padding: 4px 8px;
  border-radius: 4px;
  background: #edf3f5;
  color: #34434c;
  font-size: 10px;
  font-style: normal;
  line-height: 1.3;
}

.catalog-hero {
  padding: 28px 0 64px;
  background: #fff;
}

.catalog-hero .seo-eyebrow {
  margin-top: 48px;
}

.catalog-hero h1 {
  max-width: 830px;
  margin: 0;
  font-size: 46px;
  line-height: 1.12;
}

.catalog-hero > .seo-shell > p:not(.seo-eyebrow) {
  max-width: 720px;
  margin: 20px 0 0;
  color: var(--seo-muted);
  font-size: 16px;
  line-height: 1.7;
}

.catalog-summary {
  display: inline-flex;
  align-items: baseline;
  gap: 8px;
  margin-top: 32px;
  padding-top: 16px;
  border-top: 2px solid var(--seo-cyan);
}

.catalog-summary strong {
  font-size: 30px;
}

.catalog-summary span {
  color: var(--seo-muted);
  font-size: 12px;
}

.catalog-list-band {
  padding: 44px 0 82px;
  background: var(--seo-wash);
}

.catalog-table-head,
.catalog-row {
  display: grid;
  grid-template-columns: minmax(180px, 1.15fr) minmax(150px, 0.8fr) minmax(280px, 1.4fr) 74px;
  gap: 18px;
  align-items: center;
}

.catalog-table-head {
  min-height: 48px;
  padding: 0 20px;
  border-bottom: 1px solid #cad5dc;
  color: var(--seo-muted);
  font-size: 11px;
  font-weight: 700;
}

.catalog-list {
  border-bottom: 1px solid #cad5dc;
}

.catalog-row {
  min-height: 88px;
  padding: 16px 20px;
  border-bottom: 1px solid var(--seo-line);
  background: #fff;
}

.catalog-row:last-child {
  border-bottom: 0;
}

.catalog-row:hover,
.catalog-row:focus-visible {
  position: relative;
  z-index: 1;
  background: #f7fbfc;
  box-shadow: inset 3px 0 0 var(--seo-cyan);
}

.catalog-product,
.catalog-product strong,
.catalog-product small {
  min-width: 0;
  display: block;
}

.catalog-product strong {
  font-size: 14px;
}

.catalog-product small {
  margin-top: 5px;
  color: #4c5963;
  font-size: 12px;
  line-height: 1.45;
  overflow-wrap: anywhere;
}

.catalog-family {
  color: #45535d;
  font-size: 12px;
  line-height: 1.5;
  overflow-wrap: anywhere;
}

.catalog-chips {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
}

.catalog-open {
  color: var(--seo-cyan-dark);
  font-size: 11px;
  font-weight: 700;
  text-align: right;
}

.category-index-band {
  padding: 64px 0 82px;
  background: var(--seo-wash);
}

.category-index-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 14px;
}

.category-index-card {
  min-width: 0;
  border: 1px solid var(--seo-line);
  border-radius: var(--seo-radius);
  background: #fff;
}

.category-index-card:first-child {
  border-top-color: var(--seo-cyan);
  border-top-width: 3px;
}

.category-index-card:nth-child(2) {
  border-top-color: #2144a3;
  border-top-width: 3px;
}

.category-index-card:nth-child(3) {
  border-top-color: var(--seo-green);
  border-top-width: 3px;
}

.category-index-card:nth-child(4) {
  border-top-color: #b43b45;
  border-top-width: 3px;
}

.category-index-card:nth-child(5) {
  border-top-color: #896a24;
  border-top-width: 3px;
}

.category-index-card a {
  min-height: 260px;
  display: flex;
  flex-direction: column;
  padding: 24px;
}

.category-index-card:hover,
.category-index-card:focus-within {
  box-shadow: var(--seo-shadow);
  transform: translateY(-2px);
}

.category-index-card span {
  color: var(--seo-cyan-dark);
  font-size: 11px;
  font-weight: 800;
}

.category-index-card strong {
  margin-top: 20px;
  font-size: 22px;
  line-height: 1.25;
}

.category-index-card p {
  margin: 14px 0 0;
  color: var(--seo-muted);
  font-size: 13px;
  line-height: 1.65;
}

.category-index-card small {
  margin-top: auto;
  padding-top: 20px;
  color: #2d3a43;
  font-size: 11px;
  font-weight: 700;
}

.english-home-hero {
  position: relative;
  min-height: 560px;
  display: flex;
  align-items: flex-end;
  overflow: hidden;
  background: var(--seo-graphite);
}

.english-home-hero > img {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center;
}

.english-home-overlay {
  position: absolute;
  inset: 0;
  background: rgba(8, 13, 17, 0.66);
}

.english-home-content {
  position: relative;
  z-index: 1;
  padding-bottom: 62px;
  color: #fff;
}

.english-home-content .seo-eyebrow {
  color: #6de1ea;
}

.english-home-content h1 {
  max-width: 900px;
  margin: 0;
  font-size: 50px;
  line-height: 1.08;
}

.english-home-content > p:not(.seo-eyebrow) {
  max-width: 700px;
  margin: 20px 0 0;
  color: rgba(255, 255, 255, 0.82);
  font-size: 17px;
  line-height: 1.65;
}

.home-heading {
  margin-bottom: 30px;
}

.company-band {
  padding: 80px 0;
  background: #fff;
}

.company-layout,
.contact-static-layout,
.supplier-static-layout {
  display: grid;
  grid-template-columns: minmax(260px, 0.8fr) minmax(0, 1.2fr);
  gap: 80px;
  align-items: start;
}

.company-layout h2,
.contact-static-layout h2,
.supplier-static-layout h2 {
  margin: 0;
  font-size: 32px;
  line-height: 1.2;
}

.company-layout > div:last-child p,
.contact-static-layout > div:first-child > p:last-child,
.supplier-static-layout > div > p:last-child {
  margin: 0 0 16px;
  color: var(--seo-muted);
  font-size: 15px;
  line-height: 1.75;
}

.contact-static-band {
  padding: 76px 0;
  background: var(--seo-wash);
}

.contact-static-list {
  border-top: 1px solid #cbd6dd;
}

.contact-static-list > * {
  min-height: 70px;
  display: grid;
  grid-template-columns: 90px minmax(0, 1fr);
  align-items: center;
  gap: 18px;
  border-bottom: 1px solid #cbd6dd;
}

.contact-static-list > * > span {
  color: var(--seo-muted);
  font-size: 11px;
}

.contact-static-list > * > strong {
  font-size: 14px;
  overflow-wrap: anywhere;
}

.supplier-static-band {
  padding: 70px 0;
  background: #eaf4ef;
}

.supplier-static-layout {
  grid-template-columns: minmax(0, 1.2fr) auto;
  align-items: center;
}

.seo-footer {
  padding: 42px 0;
  background: var(--seo-graphite);
  color: #fff;
}

.footer-grid {
  display: grid;
  grid-template-columns: minmax(270px, 1fr) minmax(180px, 0.6fr) minmax(260px, 0.9fr);
  align-items: center;
  gap: 42px;
}

.footer-company {
  min-width: 0;
  display: flex;
  align-items: center;
  gap: 12px;
}

.footer-company img {
  width: 82px;
  height: 48px;
  flex: 0 0 auto;
  object-fit: contain;
  background: #fff;
  border-radius: 4px;
}

.footer-company strong,
.footer-company small {
  display: block;
}

.footer-company strong {
  font-size: 13px;
  line-height: 1.4;
}

.footer-company small {
  margin-top: 4px;
  color: #9cabb6;
  font-size: 9px;
  line-height: 1.4;
}

.footer-contact {
  display: grid;
  gap: 7px;
  font-size: 12px;
}

.footer-contact a {
  overflow-wrap: anywhere;
}

.footer-contact a:hover,
.footer-contact a:focus-visible {
  color: #6de1ea;
}

.seo-footer address {
  color: #9cabb6;
  font-size: 10px;
  font-style: normal;
  line-height: 1.65;
}

@media (max-width: 1120px) {
  .seo-header-inner {
    grid-template-columns: 220px minmax(0, 1fr) auto;
  }

  .seo-brand small {
    display: none;
  }

  .seo-nav {
    justify-content: flex-start;
    gap: 16px;
  }

  .product-layout {
    gap: 42px;
  }

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

@media (max-width: 860px) {
  .seo-shell {
    width: min(100% - 32px, 720px);
  }

  .seo-header-inner {
    min-height: 0;
    grid-template-columns: minmax(0, 1fr) auto;
    gap: 10px 18px;
    padding: 8px 0 0;
  }

  .seo-brand img {
    width: 76px;
    height: 40px;
  }

  .seo-brand strong {
    font-size: 12px;
  }

  .language-link {
    grid-column: 2;
    grid-row: 1;
  }

  .seo-nav {
    grid-column: 1 / -1;
    grid-row: 2;
    justify-content: flex-start;
    margin: 0 -16px;
    padding: 0 16px;
    border-top: 1px solid #edf1f3;
  }

  .product-layout,
  .spec-layout,
  .company-layout,
  .contact-static-layout {
    grid-template-columns: 1fr;
    gap: 38px;
  }

  .product-media {
    max-width: 650px;
  }

  .product-summary h1,
  .catalog-hero h1 {
    font-size: 36px;
  }

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

  .catalog-table-head {
    display: none;
  }

  .catalog-row {
    grid-template-columns: minmax(150px, 0.85fr) minmax(0, 1.15fr) auto;
  }

  .catalog-family {
    display: none;
  }

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

  .seo-footer address {
    grid-column: 1 / -1;
  }
}

@media (max-width: 600px) {
  .seo-shell {
    width: min(100% - 24px, 520px);
  }

  .seo-nav {
    margin: 0 -12px;
    padding: 0 12px;
  }

  .seo-brand span {
    max-width: 190px;
  }

  .product-hero {
    padding: 20px 0 52px;
  }

  .product-layout {
    margin-top: 24px;
  }

  .product-media {
    padding: 14px;
  }

  .product-summary h1,
  .catalog-hero h1 {
    font-size: 30px;
  }

  .product-family {
    font-size: 16px;
  }

  .key-facts,
  .static-spec-grid {
    grid-template-columns: 1fr;
  }

  .key-facts div,
  .key-facts div:nth-child(even),
  .static-spec-grid div,
  .static-spec-grid div:nth-child(even) {
    padding: 13px 0;
    border-left: 0;
    border-top: 0;
    border-bottom: 1px solid var(--seo-line);
  }

  .key-facts {
    border-bottom: 0;
  }

  .product-actions,
  .seo-primary-action,
  .seo-secondary-action {
    width: 100%;
  }

  .specification-band,
  .related-band,
  .category-index-band,
  .company-band,
  .contact-static-band,
  .supplier-static-band {
    padding: 54px 0;
  }

  .section-heading h2,
  .company-layout h2,
  .contact-static-layout h2,
  .supplier-static-layout h2 {
    font-size: 26px;
  }

  .related-grid,
  .category-index-grid {
    grid-template-columns: 1fr;
  }

  .related-card a,
  .category-index-card a {
    min-height: 0;
  }

  .related-card div,
  .category-index-card small {
    margin-top: 18px;
    padding-top: 0;
  }

  .catalog-hero {
    padding: 20px 0 48px;
  }

  .catalog-hero .seo-eyebrow {
    margin-top: 34px;
  }

  .catalog-list-band {
    padding: 24px 0 56px;
  }

  .catalog-row {
    grid-template-columns: minmax(0, 1fr) auto;
    gap: 12px;
    padding: 16px;
  }

  .catalog-chips {
    grid-column: 1 / -1;
    grid-row: 2;
  }

  .catalog-open {
    grid-column: 2;
    grid-row: 1;
  }

  .english-home-hero {
    min-height: 540px;
  }

  .english-home-content {
    padding-bottom: 44px;
  }

  .english-home-content h1 {
    font-size: 34px;
  }

  .english-home-content > p:not(.seo-eyebrow) {
    font-size: 15px;
  }

  .supplier-static-layout {
    grid-template-columns: 1fr;
    gap: 28px;
  }

  .footer-grid {
    grid-template-columns: 1fr;
    gap: 26px;
  }

  .seo-footer address {
    grid-column: 1;
  }
}