:root {
  --ink: #172024;
  --muted: #5e6b70;
  --line: #dce5e5;
  --surface: #f7faf9;
  --white: #ffffff;
  --teal: #0c6c72;
  --teal-dark: #084a52;
  --gold: #c68a35;
  --steel: #45616b;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  color: var(--ink);
  background: var(--surface);
  font-family: "Microsoft YaHei", "PingFang SC", Arial, sans-serif;
  line-height: 1.6;
}

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

.site-header {
  position: fixed;
  top: 0;
  left: 0;
  z-index: 20;
  display: flex;
  align-items: center;
  justify-content: space-between;
  width: 100%;
  padding: 18px clamp(18px, 4vw, 56px);
  color: var(--white);
  transition: background 0.25s ease, box-shadow 0.25s ease, padding 0.25s ease;
}

.site-header.is-scrolled {
  padding-block: 12px;
  color: var(--ink);
  background: rgba(255, 255, 255, 0.94);
  box-shadow: 0 10px 30px rgba(23, 32, 36, 0.12);
  backdrop-filter: blur(14px);
}

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

.brand-mark {
  display: grid;
  width: 48px;
  height: 42px;
  place-items: center;
  border: 1px solid currentColor;
  font-size: 14px;
  font-weight: 800;
}

.brand strong,
.brand small {
  display: block;
  line-height: 1.15;
}

.brand small {
  margin-top: 4px;
  color: currentColor;
  font-size: 11px;
  opacity: 0.72;
  text-transform: uppercase;
}

.nav {
  display: flex;
  align-items: center;
  gap: 22px;
  font-size: 15px;
}

.nav a {
  opacity: 0.9;
}

.nav a:hover {
  opacity: 1;
}

.nav-cta {
  padding: 9px 16px;
  border: 1px solid currentColor;
}

.menu-button {
  display: none;
  width: 42px;
  height: 42px;
  padding: 0;
  border: 1px solid currentColor;
  color: inherit;
  background: transparent;
}

.menu-button span {
  display: block;
  width: 18px;
  height: 2px;
  margin: 4px auto;
  background: currentColor;
}

.hero {
  position: relative;
  min-height: 92vh;
  color: var(--white);
  overflow: hidden;
}

.hero-image {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.hero-scrim {
  position: absolute;
  inset: 0;
  background:
    linear-gradient(90deg, rgba(5, 26, 31, 0.82), rgba(5, 26, 31, 0.5) 48%, rgba(5, 26, 31, 0.16)),
    linear-gradient(0deg, rgba(5, 26, 31, 0.3), rgba(5, 26, 31, 0));
}

.hero-content {
  position: relative;
  z-index: 1;
  max-width: 820px;
  padding: 190px clamp(20px, 7vw, 92px) 150px;
}

.eyebrow {
  margin: 0 0 14px;
  color: var(--gold);
  font-size: 13px;
  font-weight: 800;
  letter-spacing: 0;
  text-transform: uppercase;
}

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

h1 {
  max-width: 760px;
  margin: 0;
  font-size: clamp(40px, 7vw, 82px);
  line-height: 1.04;
  letter-spacing: 0;
}

h2 {
  margin: 0;
  font-size: clamp(28px, 4vw, 44px);
  line-height: 1.15;
  letter-spacing: 0;
}

h3 {
  margin: 0;
  font-size: 21px;
  line-height: 1.25;
}

.hero-copy {
  max-width: 650px;
  margin: 24px 0 0;
  color: rgba(255, 255, 255, 0.86);
  font-size: 19px;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 34px;
}

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 46px;
  padding: 12px 22px;
  border: 1px solid transparent;
  font-weight: 800;
}

.button.primary {
  color: var(--white);
  background: var(--teal);
}

.button.primary:hover {
  background: var(--teal-dark);
}

.button.secondary {
  color: var(--white);
  border-color: rgba(255, 255, 255, 0.72);
}

.hero-metrics {
  position: relative;
  z-index: 2;
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  margin: -92px clamp(20px, 7vw, 92px) 0;
  background: rgba(255, 255, 255, 0.94);
  box-shadow: 0 24px 70px rgba(8, 74, 82, 0.22);
}

.hero-metrics div {
  min-width: 0;
  padding: 26px;
  color: var(--ink);
  border-right: 1px solid var(--line);
}

.hero-metrics div:last-child {
  border-right: 0;
}

.hero-metrics strong,
.hero-metrics span {
  display: block;
}

.hero-metrics strong {
  color: var(--teal);
  font-size: 28px;
  line-height: 1.1;
}

.hero-metrics span {
  margin-top: 8px;
  color: var(--muted);
  font-size: 14px;
}

.section {
  padding: 96px clamp(20px, 7vw, 92px);
}

.section-heading {
  max-width: 720px;
}

.company-facts {
  display: grid;
  gap: 12px;
  margin: 28px 0 0;
}

.company-facts div {
  display: grid;
  grid-template-columns: 120px 1fr;
  gap: 14px;
  padding-bottom: 12px;
  border-bottom: 1px solid var(--line);
}

.company-facts dt {
  color: var(--steel);
  font-weight: 800;
}

.company-facts dd {
  margin: 0;
  color: var(--ink);
}

.seo-copy {
  background: #edf4f3;
}

.seo-copy h2,
.seo-copy p {
  max-width: 920px;
}

.seo-copy p {
  margin: 18px 0 0;
  color: var(--muted);
  font-size: 18px;
}

.keyword-hub {
  background: var(--white);
}

.keyword-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 16px;
  margin-top: 34px;
}

.keyword-grid article {
  min-height: 210px;
  padding: 26px;
  border: 1px solid var(--line);
  background: var(--surface);
}

.keyword-grid p {
  margin: 14px 0 0;
  color: var(--muted);
}

.intro {
  display: grid;
  grid-template-columns: minmax(280px, 0.85fr) minmax(300px, 1fr);
  gap: clamp(28px, 6vw, 80px);
  padding-top: 150px;
  background: var(--white);
}

.intro > p {
  margin: 35px 0 0;
  color: var(--muted);
  font-size: 18px;
}

.product-band {
  background: #edf4f3;
}

.product-heading-row {
  display: block;
  align-items: flex-start;
}

.product-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 16px;
  margin-top: 34px;
}

.product-card {
  min-height: 280px;
  padding: 26px;
  border: 1px solid var(--line);
  background: var(--white);
}

.product-code {
  display: block;
  margin-bottom: 58px;
  color: var(--gold);
  font-size: 14px;
  font-weight: 800;
}

.product-card p,
.capability-list p,
.process-grid p,
.contact-copy p {
  margin: 14px 0 0;
  color: var(--muted);
}

.product-portal-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 16px;
  margin-top: 34px;
}

.product-portal-card {
  display: grid;
  min-height: 260px;
  padding: 28px;
  border: 1px solid var(--line);
  background: var(--white);
  transition: border-color 0.2s ease, box-shadow 0.2s ease, transform 0.2s ease;
}

.product-portal-card:hover {
  border-color: rgba(12, 108, 114, 0.36);
  box-shadow: 0 22px 48px rgba(23, 32, 36, 0.1);
  transform: translateY(-2px);
}

.product-portal-card h3 {
  margin: 0;
  font-size: 28px;
  line-height: 1.18;
}

.product-portal-card p {
  margin: 16px 0 26px;
  color: var(--muted);
}

.product-portal-card strong {
  align-self: end;
  color: var(--teal);
  font-size: 15px;
}

.product-portal-card-media {
  overflow: hidden;
  padding-top: 0;
}

.product-portal-card-media img {
  width: calc(100% + 56px);
  height: 132px;
  margin: 0 -28px 22px;
  object-fit: cover;
}

.product-feature-layout {
  display: grid;
  grid-template-columns: minmax(0, 1.05fr) minmax(320px, 0.95fr);
  gap: clamp(26px, 5vw, 64px);
  align-items: stretch;
  margin-top: 28px;
}

.product-feature-copy {
  padding: 34px;
  border: 1px solid var(--line);
  background: var(--white);
}

.product-feature-copy h3 {
  max-width: 760px;
  margin: 8px 0 16px;
  font-size: clamp(30px, 4vw, 48px);
  line-height: 1.1;
}

.product-feature-copy > p {
  margin: 0;
  color: var(--muted);
  font-size: 17px;
}

.product-choice-list {
  display: grid;
  gap: 14px;
  margin-top: 28px;
}

.product-choice-list article {
  display: grid;
  grid-template-columns: 44px minmax(0, 1fr);
  gap: 12px 18px;
  padding-top: 18px;
  border-top: 1px solid var(--line);
}

.product-choice-list span {
  grid-row: span 2;
  color: var(--gold);
  font-size: 13px;
  font-weight: 800;
}

.product-choice-list h4 {
  margin: 0;
  color: var(--teal-dark);
  font-size: 21px;
  line-height: 1.25;
}

.product-choice-list p {
  margin: 0;
  color: var(--muted);
}

.product-packaging {
  display: grid;
  align-content: stretch;
  margin: 0;
  border: 1px solid var(--line);
  background: var(--white);
}

.product-packaging img {
  width: 100%;
  height: 100%;
  min-height: 430px;
  object-fit: cover;
}

.product-packaging figcaption {
  display: grid;
  gap: 8px;
  padding: 24px;
  border-top: 1px solid var(--line);
}

.product-packaging strong {
  color: var(--teal-dark);
  font-size: 22px;
}

.product-packaging span {
  color: var(--muted);
}

.comparison-wrap {
  margin-top: 28px;
  overflow-x: auto;
  border: 1px solid var(--line);
  background: var(--white);
}

.comparison-table {
  width: 100%;
  min-width: 820px;
  border-collapse: collapse;
}

.comparison-table th,
.comparison-table td {
  padding: 18px;
  border-bottom: 1px solid var(--line);
  text-align: left;
  vertical-align: top;
}

.comparison-table th {
  color: var(--teal-dark);
  background: #f3f8f7;
  font-size: 14px;
}

.comparison-table td:first-child {
  color: var(--teal);
  font-weight: 800;
}

.split {
  display: grid;
  grid-template-columns: minmax(280px, 0.8fr) minmax(320px, 1.2fr);
  gap: clamp(28px, 6vw, 86px);
  background: var(--white);
}

.capability-list {
  display: grid;
  gap: 22px;
}

.capability-list div {
  padding-bottom: 22px;
  border-bottom: 1px solid var(--line);
}

.applications {
  background: var(--teal-dark);
  color: var(--white);
}

.quality-system {
  background: var(--white);
}

.quality-system .section-heading p {
  max-width: 900px;
  margin: 14px 0 0;
  color: var(--muted);
  font-size: 18px;
  line-height: 1.75;
}

.quality-portal-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 16px;
  margin-top: 34px;
}

.quality-portal-card {
  display: grid;
  min-height: 260px;
  padding: 26px;
  border: 1px solid var(--line);
  background: var(--surface);
  transition: border-color 0.2s ease, box-shadow 0.2s ease, transform 0.2s ease;
}

.quality-portal-card:hover {
  border-color: rgba(12, 108, 114, 0.36);
  box-shadow: 0 22px 48px rgba(23, 32, 36, 0.1);
  transform: translateY(-2px);
}

.quality-portal-card h3 {
  margin: 0;
  font-size: 25px;
  line-height: 1.2;
}

.quality-portal-card p {
  margin: 14px 0 24px;
  color: var(--muted);
}

.quality-portal-card strong {
  align-self: end;
  color: var(--teal);
  font-size: 15px;
}

.factory-photos {
  background: #edf4f3;
}

.factory-photos .section-heading p {
  max-width: 900px;
  margin: 14px 0 0;
  color: var(--muted);
  font-size: 18px;
  line-height: 1.75;
}

.factory-photo-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 18px;
  margin-top: 34px;
}

.factory-photo-grid article {
  overflow: hidden;
  border: 1px solid var(--line);
  background: var(--white);
}

.factory-photo-grid img {
  display: block;
  width: 100%;
  aspect-ratio: 16 / 10;
  object-fit: cover;
  background: #dbe8e6;
}

.factory-photo-button {
  position: relative;
  display: block;
  width: 100%;
  padding: 0;
  border: 0;
  background: transparent;
  cursor: zoom-in;
}

.factory-photo-button::after {
  content: "点击放大";
  position: absolute;
  right: 14px;
  bottom: 14px;
  padding: 6px 10px;
  color: var(--white);
  background: rgba(8, 74, 82, 0.82);
  font-size: 13px;
  font-weight: 800;
  opacity: 0;
  transform: translateY(4px);
  transition: opacity 0.18s ease, transform 0.18s ease;
}

.factory-photo-button:hover::after,
.factory-photo-button:focus-visible::after {
  opacity: 1;
  transform: translateY(0);
}

.factory-photo-button:focus-visible {
  outline: 3px solid var(--gold);
  outline-offset: -3px;
}

.factory-photo-grid div {
  padding: 22px;
}

.factory-photo-grid h3 {
  margin: 0;
  font-size: 22px;
}

.factory-photo-grid p {
  margin: 12px 0 0;
  color: var(--muted);
  line-height: 1.7;
}

.image-lightbox {
  position: fixed;
  inset: 0;
  z-index: 80;
  display: grid;
  place-items: center;
  padding: clamp(18px, 4vw, 56px);
}

.image-lightbox[hidden] {
  display: none;
}

.lightbox-backdrop {
  position: absolute;
  inset: 0;
  border: 0;
  background: rgba(8, 30, 35, 0.78);
  cursor: zoom-out;
}

.lightbox-panel {
  position: relative;
  z-index: 1;
  width: min(1120px, 100%);
  max-height: 88vh;
  margin: 0;
  overflow: hidden;
  border: 1px solid rgba(255, 255, 255, 0.18);
  background: var(--white);
  box-shadow: 0 30px 90px rgba(0, 0, 0, 0.36);
}

.lightbox-panel img {
  display: block;
  width: 100%;
  max-height: calc(88vh - 70px);
  object-fit: contain;
  background: #0b2529;
}

.lightbox-panel figcaption {
  padding: 18px 22px;
  color: var(--teal-dark);
  font-weight: 800;
}

.lightbox-close {
  position: absolute;
  top: 12px;
  right: 12px;
  z-index: 2;
  display: grid;
  width: 42px;
  height: 42px;
  place-items: center;
  border: 1px solid rgba(255, 255, 255, 0.6);
  color: var(--white);
  background: rgba(8, 74, 82, 0.82);
  cursor: pointer;
  font-size: 28px;
  line-height: 1;
}

.assurance {
  background: #f6faf9;
}

.assurance .section-heading p {
  max-width: 900px;
  margin: 14px 0 0;
  color: var(--muted);
  font-size: 18px;
  line-height: 1.75;
}

.process-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 16px;
  margin-top: 34px;
}

.process-grid article {
  min-height: 230px;
  padding: 24px;
  border: 1px solid var(--line);
  background: var(--surface);
}

.assurance-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 14px;
  margin-top: 34px;
}

.assurance-grid article {
  min-height: 240px;
  padding: 24px;
  border: 1px solid var(--line);
  background: var(--white);
}

.assurance-grid span {
  display: inline-grid;
  width: 38px;
  height: 38px;
  margin-bottom: 18px;
  place-items: center;
  border: 1px solid rgba(12, 108, 114, 0.22);
  color: var(--teal);
  font-size: 13px;
  font-weight: 800;
}

.assurance-grid p {
  margin: 12px 0 0;
  color: var(--muted);
  line-height: 1.7;
}

.process-icon {
  display: inline-grid;
  width: 42px;
  height: 42px;
  margin-bottom: 30px;
  place-items: center;
  color: var(--white);
  background: var(--teal);
  font-size: 13px;
  font-weight: 800;
}

.application-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 12px;
  margin-top: 34px;
}

.application-grid article {
  min-height: 210px;
  padding: 24px;
  border: 1px solid rgba(255, 255, 255, 0.16);
  background: rgba(255, 255, 255, 0.06);
}

.application-grid h3 {
  margin: 0;
  font-size: 22px;
  line-height: 1.3;
}

.application-grid p {
  margin: 14px 0 0;
  color: rgba(255, 255, 255, 0.74);
  line-height: 1.7;
}

.application-grid article:hover {
  border-color: rgba(255, 255, 255, 0.45);
  background: rgba(255, 255, 255, 0.1);
}

.quality {
  background: var(--surface);
}

.quality-row {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 18px;
  margin-top: 34px;
}

.quality-item {
  padding: 28px;
  border-left: 4px solid var(--gold);
  background: var(--white);
}

.quality-item strong,
.quality-item span {
  display: block;
}

.quality-item span {
  margin-top: 10px;
  color: var(--muted);
}

.contact {
  display: grid;
  grid-template-columns: minmax(280px, 0.9fr) minmax(320px, 1.1fr);
  gap: clamp(28px, 6vw, 84px);
  background: var(--white);
}

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

.contact-methods article {
  display: grid;
  min-height: 150px;
  align-content: space-between;
  gap: 20px;
  padding: 24px;
  border: 1px solid var(--line);
  background: var(--surface);
}

.contact-methods span {
  color: var(--steel);
  font-size: 14px;
  font-weight: 800;
}

.contact-methods strong {
  color: var(--teal-dark);
  font-size: clamp(21px, 2.2vw, 30px);
  line-height: 1.1;
  overflow-wrap: anywhere;
  word-break: break-word;
}

.footer {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 20px;
  padding: 24px clamp(20px, 7vw, 92px);
  color: rgba(255, 255, 255, 0.7);
  background: #121b1f;
  font-size: 14px;
}

.footer-copy {
  display: grid;
  gap: 6px;
}

.language-switcher {
  position: relative;
  z-index: 6;
  width: 126px;
  flex: 0 0 auto;
}

.language-switcher button {
  min-height: 34px;
  padding: 7px 11px;
  border: 1px solid rgba(12, 108, 114, 0.24);
  color: var(--teal-dark);
  background: rgba(255, 255, 255, 0.72);
  font: inherit;
  cursor: pointer;
}

.language-trigger {
  width: 100%;
  font-weight: 800;
}

.language-menu {
  position: absolute;
  top: calc(100% + 8px);
  left: 0;
  display: grid;
  min-width: 148px;
  padding: 8px;
  border: 1px solid var(--line);
  background: var(--white);
  box-shadow: 0 18px 42px rgba(23, 32, 36, 0.16);
  opacity: 0;
  visibility: hidden;
  transform: translateY(-6px);
  transition: opacity 0.16s ease, transform 0.16s ease, visibility 0.16s ease;
}

.language-switcher:hover .language-menu,
.language-switcher:focus-within .language-menu {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}

.language-menu button {
  width: 100%;
  border-color: transparent;
  text-align: left;
}

.language-trigger:hover,
.language-trigger:focus-visible,
.language-menu button:hover,
.language-menu button.is-active {
  color: var(--white);
  border-color: var(--gold);
  background: var(--teal);
}

.sds-page {
  background: var(--surface);
}

.sds-page .site-header {
  color: var(--ink);
  background: rgba(255, 255, 255, 0.96);
  box-shadow: 0 10px 30px rgba(23, 32, 36, 0.12);
  backdrop-filter: blur(14px);
}

.sds-hero {
  display: grid;
  grid-template-columns: minmax(0, 1.35fr) minmax(280px, 0.65fr);
  gap: 34px;
  align-items: end;
  padding: 150px clamp(20px, 7vw, 112px) 88px;
  color: var(--white);
  background:
    linear-gradient(90deg, rgba(8, 74, 82, 0.94), rgba(8, 74, 82, 0.62)),
    url("assets/factory-lab.jpg") center / cover;
}

.tds-hero {
  background:
    linear-gradient(90deg, rgba(8, 74, 82, 0.94), rgba(8, 74, 82, 0.58)),
    url("assets/factory-workshop.jpg") center / cover;
}

.sds-hero h1 {
  max-width: 820px;
  margin: 8px 0 20px;
  font-size: clamp(42px, 6vw, 78px);
  line-height: 0.98;
}

.sds-hero p {
  max-width: 760px;
  margin: 0;
  color: rgba(255, 255, 255, 0.86);
  font-size: 18px;
}

.sds-hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 32px;
}

.sds-summary {
  padding: 28px;
  border: 1px solid rgba(255, 255, 255, 0.34);
  background: rgba(255, 255, 255, 0.12);
  backdrop-filter: blur(10px);
}

.sds-summary span {
  color: var(--gold);
  font-size: 12px;
  font-weight: 800;
  text-transform: uppercase;
}

.sds-summary strong {
  display: block;
  margin: 10px 0 14px;
  font-size: 30px;
  line-height: 1.1;
}

.sds-document {
  background: var(--surface);
}

.sds-note {
  display: grid;
  grid-template-columns: 180px minmax(0, 1fr);
  gap: 22px;
  margin-top: 28px;
  padding: 24px 28px;
  border-left: 4px solid var(--gold);
  background: var(--white);
}

.sds-product-table {
  margin-top: 28px;
  border: 1px solid var(--line);
  background: var(--white);
  overflow-x: auto;
}

.sds-note strong {
  color: var(--teal);
  font-size: 18px;
}

.sds-note p {
  margin: 0;
  color: var(--muted);
}

.sds-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 18px;
  margin-top: 34px;
}

.sds-card {
  min-height: 100%;
  padding: 28px;
  border: 1px solid var(--line);
  background: var(--white);
}

.sds-card span {
  display: inline-grid;
  width: 44px;
  height: 44px;
  place-items: center;
  color: var(--white);
  background: var(--teal);
  font-weight: 800;
}

.sds-card h2 {
  margin: 18px 0 14px;
  font-size: 26px;
  line-height: 1.2;
}

.sds-card ul {
  margin: 0;
  padding-left: 20px;
  color: var(--muted);
}

.sds-card li + li {
  margin-top: 8px;
}

.sds-table {
  width: 100%;
  border-collapse: collapse;
  color: var(--muted);
  font-size: 15px;
}

.sds-table th,
.sds-table td {
  padding: 12px;
  border: 1px solid var(--line);
  text-align: left;
  vertical-align: top;
}

.sds-table th {
  width: 34%;
  color: var(--ink);
  background: #eef5f4;
  font-weight: 800;
}

.tds-table th {
  width: auto;
}

.tds-table td:first-child {
  color: var(--teal);
}

.sds-contact {
  display: grid;
  grid-template-columns: minmax(0, 1.15fr) minmax(300px, 0.85fr);
  gap: 34px;
  align-items: center;
  color: var(--white);
  background: var(--teal-dark);
}

.sds-contact h2 {
  margin: 8px 0 12px;
  font-size: clamp(32px, 4vw, 54px);
  line-height: 1.08;
}

.sds-contact p {
  max-width: 700px;
  margin: 0;
  color: rgba(255, 255, 255, 0.76);
}

.sds-contact-box {
  display: grid;
  gap: 12px;
  padding: 28px;
  border: 1px solid rgba(255, 255, 255, 0.22);
  background: rgba(255, 255, 255, 0.08);
}

.sds-contact-box a {
  font-size: clamp(22px, 3vw, 34px);
  font-weight: 800;
  line-height: 1.1;
  overflow-wrap: anywhere;
}

@media (max-width: 920px) {
  .menu-button {
    display: block;
  }

  .nav {
    position: absolute;
    top: 72px;
    right: 18px;
    display: none;
    width: min(300px, calc(100vw - 36px));
    padding: 18px;
    color: var(--ink);
    background: var(--white);
    box-shadow: 0 18px 50px rgba(23, 32, 36, 0.2);
  }

  .nav.is-open {
    display: grid;
    gap: 14px;
  }

  .nav .language-switcher {
    width: 180px;
  }

  .nav-cta {
    text-align: center;
  }

  .hero-content {
    padding-top: 150px;
  }

  .hero-metrics,
  .intro,
  .split,
  .contact,
  .contact-methods {
    grid-template-columns: 1fr;
  }

  .hero-metrics {
    margin-top: -48px;
  }

  .product-grid,
  .product-portal-grid,
  .quality-portal-grid,
  .quality-row,
  .process-grid,
  .factory-photo-grid,
  .assurance-grid,
  .keyword-grid,
  .sds-grid,
  .sds-hero,
  .sds-contact {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .sds-hero,
  .sds-contact {
    grid-template-columns: 1fr;
  }

  .product-heading-row {
    display: block;
  }

  .product-feature-layout {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 640px) {
  .site-header {
    padding-inline: 16px;
  }

  .brand small {
    display: none;
  }

  .hero {
    min-height: 840px;
  }

  .hero-content {
    padding: 132px 20px 120px;
  }

  .hero-copy {
    font-size: 17px;
  }

  .hero-metrics,
  .product-grid,
  .product-portal-grid,
  .quality-portal-grid,
  .application-grid,
    .quality-row,
    .process-grid,
    .factory-photo-grid,
    .assurance-grid,
    .keyword-grid,
    .sds-grid {
    grid-template-columns: 1fr;
  }

  .sds-hero {
    grid-template-columns: 1fr;
    padding: 132px 20px 72px;
  }

  .sds-note {
    grid-template-columns: 1fr;
  }

  .sds-card {
    padding: 24px;
  }

  .sds-contact {
    grid-template-columns: 1fr;
  }

  .product-feature-copy {
    padding: 24px;
  }

  .product-choice-list article {
    grid-template-columns: 1fr;
  }

  .product-packaging img {
    min-height: 300px;
  }

  .hero-metrics {
    margin-inline: 20px;
  }

  .hero-metrics div {
    border-right: 0;
    border-bottom: 1px solid var(--line);
  }

  .hero-metrics div:last-child {
    border-bottom: 0;
  }

  .section {
    padding: 72px 20px;
  }

  .intro {
    padding-top: 116px;
  }

  .footer {
    display: grid;
  }

  .company-facts div {
    grid-template-columns: 1fr;
    gap: 4px;
  }
}

/* Header logo for Xuzhou InnoQuartz */
.brand {
  gap: 12px;
}

.brand > span {
  position: absolute;
  width: 1px;
  height: 1px;
  overflow: hidden;
  clip: rect(0 0 0 0);
  white-space: nowrap;
}

.brand-logo {
  display: block;
  width: auto;
  height: clamp(42px, 4vw, 54px);
  max-width: min(260px, 26vw);
  object-fit: contain;
}

@media (max-width: 720px) {
  .brand-logo {
    height: 40px;
    max-width: 170px;
  }
}