:root {
  --ink: #121417;
  --muted: #646b73;
  --line: #d8dde2;
  --paper: #f4f5f6;
  --panel: #ffffff;
  --accent: #b8302b;
  --accent-dark: #8f2420;
  --navy: #14253f;
  --steel: #6d7781;
  --soft: #eef1f3;
  --shadow: 0 22px 60px rgba(18, 20, 23, 0.12);
  --radius: 6px;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  line-height: 1.65;
}

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

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

.top-strip {
  display: flex;
  justify-content: space-between;
  gap: 20px;
  padding: 8px clamp(18px, 5vw, 72px);
  background: var(--navy);
  color: rgba(255, 255, 255, 0.8);
  font-size: 12px;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 30;
  display: grid;
  grid-template-columns: minmax(250px, 0.6fr) minmax(0, 1fr) auto;
  align-items: center;
  gap: 28px;
  padding: 16px clamp(18px, 5vw, 72px);
  background: rgba(255, 255, 255, 0.96);
  border-bottom: 1px solid var(--line);
  backdrop-filter: blur(16px);
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 14px;
  min-width: 0;
}

.brand-mark {
  display: grid;
  width: 150px;
  height: 48px;
  place-items: center;
  background: transparent;
  border: 0;
  border-radius: 0;
  overflow: hidden;
}

.brand-mark img {
  width: 148px;
  height: auto;
}

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

.brand strong {
  color: var(--navy);
  font-size: 17px;
  line-height: 1.2;
}

.brand small {
  margin-top: 3px;
  color: var(--muted);
  font-size: 12px;
}

.nav {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: clamp(14px, 2.1vw, 30px);
  color: #30363d;
  font-size: 14px;
  font-weight: 720;
}

.nav a {
  position: relative;
  white-space: nowrap;
}

.nav a::after {
  position: absolute;
  right: 0;
  bottom: -9px;
  left: 0;
  height: 2px;
  background: var(--accent);
  content: "";
  transform: scaleX(0);
  transform-origin: left;
  transition: transform 180ms ease;
}

.nav a:hover,
.nav a.is-active {
  color: var(--accent);
}

.nav a:hover::after,
.nav a.is-active::after {
  transform: scaleX(1);
}

.header-actions {
  display: flex;
  align-items: center;
  gap: 10px;
}

.lang-toggle {
  display: inline-grid;
  grid-template-columns: 1fr 1fr;
  gap: 2px;
  width: 76px;
  height: 36px;
  padding: 3px;
  border: 1px solid var(--line);
  background: white;
  border-radius: 999px;
  cursor: pointer;
}

.lang-toggle span {
  display: grid;
  place-items: center;
  border-radius: 999px;
  color: var(--muted);
  font-size: 12px;
  font-weight: 800;
}

html[lang="zh-CN"] [data-lang-option="zh"],
html[lang="en"] [data-lang-option="en"] {
  background: var(--navy);
  color: white;
}

.btn {
  display: inline-flex;
  min-height: 42px;
  align-items: center;
  justify-content: center;
  padding: 0 18px;
  border: 1px solid transparent;
  border-radius: 4px;
  font-size: 14px;
  font-weight: 780;
  line-height: 1;
  cursor: pointer;
}

.btn-sm {
  min-height: 36px;
  padding-inline: 14px;
  font-size: 13px;
}

.btn-accent {
  background: var(--accent);
  color: white;
}

.btn-accent:hover {
  background: var(--accent-dark);
}

.btn-dark {
  background: var(--navy);
  color: white;
}

.btn-ghost {
  border-color: var(--line);
  background: white;
  color: var(--navy);
}

.hero {
  display: grid;
  grid-template-columns: minmax(0, 0.95fr) minmax(420px, 1.05fr);
  min-height: calc(100vh - 112px);
  gap: clamp(36px, 5vw, 80px);
  align-items: center;
  padding: clamp(56px, 7vw, 96px) clamp(18px, 5vw, 72px);
  background: linear-gradient(180deg, #ffffff 0%, #f4f5f6 100%);
}

.hero-copy {
  max-width: 780px;
}

.eyebrow {
  margin: 0 0 14px;
  color: var(--accent);
  font-size: 12px;
  font-weight: 850;
  letter-spacing: 0;
  text-transform: uppercase;
}

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

h1 {
  max-width: 780px;
  margin: 0;
  color: var(--navy);
  font-size: clamp(38px, 4.8vw, 66px);
  line-height: 1.08;
  letter-spacing: 0;
}

.hero-lede {
  max-width: 690px;
  margin: 24px 0 30px;
  color: #3e454c;
  font-size: clamp(16px, 1.35vw, 19px);
}

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

.hero-visual img,
.page-hero-media img {
  width: 100%;
  object-fit: cover;
  border-radius: var(--radius);
  box-shadow: var(--shadow);
}

.hero-visual img {
  aspect-ratio: 4 / 3;
}

.capability-strip {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 1px;
  margin-top: 14px;
  background: var(--line);
  border: 1px solid var(--line);
}

.capability-strip span {
  min-height: 58px;
  display: grid;
  place-items: center;
  padding: 10px;
  background: white;
  color: var(--navy);
  font-size: 12px;
  font-weight: 760;
  text-align: center;
}

.section,
.page-hero,
.quote-band {
  padding: clamp(56px, 7vw, 94px) clamp(18px, 5vw, 72px);
}

.section,
.page-hero,
.quote-band,
.reveal {
  opacity: 0;
  transform: translateY(16px);
  transition: opacity 520ms ease, transform 520ms ease;
}

.section.is-visible,
.page-hero.is-visible,
.quote-band.is-visible,
.reveal.is-visible {
  opacity: 1;
  transform: translateY(0);
}

.page-hero {
  display: grid;
  grid-template-columns: minmax(0, 0.88fr) minmax(360px, 0.72fr);
  gap: clamp(30px, 5vw, 70px);
  align-items: center;
  background: white;
  border-bottom: 1px solid var(--line);
}

.page-hero-media img {
  aspect-ratio: 16 / 10;
}

.section-heading {
  max-width: 900px;
  margin-bottom: 34px;
}

.section-heading.center {
  margin-inline: auto;
  text-align: center;
}

.section-heading h2,
.page-hero h1,
.quote-band h2 {
  margin: 0;
  color: var(--navy);
  font-size: clamp(30px, 3.5vw, 48px);
  line-height: 1.14;
}

.section-heading p:not(.eyebrow),
.page-hero p:not(.eyebrow) {
  max-width: 760px;
  margin: 16px 0 0;
  color: var(--muted);
  font-size: 16px;
}

.grid-2,
.grid-3,
.grid-4 {
  display: grid;
  gap: 18px;
}

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

.grid-3 {
  grid-template-columns: repeat(3, minmax(0, 1fr));
}

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

.card,
.product-card,
.process-card,
.contact-card,
.rfq-form {
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: var(--radius);
}

.card,
.process-card {
  padding: clamp(22px, 2.5vw, 32px);
}

.card h3,
.process-card h3,
.contact-card h3,
.product-card h3 {
  margin: 0 0 12px;
  color: var(--navy);
  font-size: 22px;
  line-height: 1.25;
}

.card p,
.process-card p,
.product-card p {
  margin: 0;
  color: var(--muted);
}

.number {
  display: inline-flex;
  margin-bottom: 30px;
  color: var(--accent);
  font-size: 13px;
  font-weight: 850;
}

.product-card {
  display: grid;
  grid-template-columns: minmax(220px, 0.78fr) minmax(0, 1fr);
  gap: 22px;
  padding: 16px;
}

.product-card img {
  width: 100%;
  height: 100%;
  min-height: 300px;
  object-fit: cover;
  border-radius: 4px;
}

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

.product-showcase article {
  display: grid;
  grid-template-rows: auto 1fr;
  overflow: hidden;
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: var(--radius);
}

.product-showcase img {
  width: 100%;
  aspect-ratio: 16 / 10;
  object-fit: cover;
  background: #dfe3e7;
}

.product-showcase article > div {
  padding: 18px;
}

.product-showcase h3 {
  margin: 0 0 10px;
  color: var(--navy);
  font-size: 19px;
  line-height: 1.25;
}

.product-showcase p:not(.card-kicker) {
  margin: 0;
  color: var(--muted);
  font-size: 14px;
}

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

.spec-grid article,
.document-matrix article {
  display: grid;
  gap: 10px;
  min-height: 180px;
  padding: 22px;
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: var(--radius);
}

.spec-grid strong,
.document-matrix strong {
  color: var(--navy);
  font-size: 17px;
  line-height: 1.25;
}

.spec-grid span,
.document-matrix span {
  color: var(--muted);
  font-size: 14px;
}

.document-samples {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 16px;
}

.doc-sample-card {
  overflow: hidden;
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  box-shadow: 0 12px 32px rgba(15, 32, 52, 0.08);
}

.doc-sample-card figure {
  position: relative;
  margin: 0;
  background: #dfe4e9;
}

.doc-sample-card figure::after {
  position: absolute;
  right: 12px;
  bottom: 12px;
  padding: 7px 10px;
  background: rgba(196, 49, 47, 0.92);
  color: #ffffff;
  border-radius: 4px;
  content: "REDACTED SAMPLE";
  font-size: 11px;
  font-weight: 850;
  letter-spacing: 0.06em;
}

.doc-sample-card img {
  display: block;
  width: 100%;
  aspect-ratio: 4 / 5;
  object-fit: contain;
  object-position: top center;
  background: #ffffff;
}

.doc-sample-card > div {
  padding: 18px;
}

.doc-sample-card h3 {
  margin: 0 0 8px;
  color: var(--navy);
  font-size: 19px;
  line-height: 1.25;
}

.doc-sample-card p:not(.card-kicker) {
  margin: 0;
  color: var(--muted);
  font-size: 14px;
}

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

.evidence-card {
  overflow: hidden;
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: var(--radius);
}

.evidence-card img {
  width: 100%;
  aspect-ratio: 16 / 10;
  object-fit: cover;
  background: #dfe3e7;
}

.evidence-card div {
  padding: 22px;
}

.evidence-card h3 {
  margin: 0 0 10px;
  color: var(--navy);
  font-size: 22px;
  line-height: 1.25;
}

.evidence-card p:not(.card-kicker) {
  margin: 0;
  color: var(--muted);
}

.certification-layout {
  display: grid;
  grid-template-columns: minmax(280px, 0.62fr) minmax(0, 1fr);
  gap: 24px;
  align-items: start;
}

.certificate-frame {
  margin: 0;
  padding: 14px;
  background: #ffffff;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
}

.certificate-frame img {
  display: block;
  width: 100%;
  max-height: 760px;
  object-fit: contain;
  background: #f6f8fa;
  border-radius: 4px;
}

.certification-panel {
  display: grid;
  gap: 16px;
  padding: clamp(24px, 4vw, 42px);
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: var(--radius);
}

.certification-panel h3 {
  margin: 0;
  color: var(--navy);
  font-size: clamp(24px, 3vw, 36px);
  line-height: 1.15;
}

.certification-panel p:not(.card-kicker) {
  margin: 0;
  color: var(--muted);
  font-size: 16px;
  line-height: 1.75;
}

.cert-meta {
  display: grid;
  gap: 12px;
  margin-top: 8px;
}

.cert-meta div {
  display: grid;
  gap: 6px;
  padding: 14px 0;
  border-top: 1px solid var(--line);
}

.cert-meta strong {
  color: var(--navy);
  font-size: 13px;
}

.cert-meta span {
  color: #313943;
  font-size: 15px;
  line-height: 1.5;
}

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

.quality-ledger article {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: 18px;
  padding: 24px;
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: var(--radius);
}

.quality-ledger article > span {
  display: grid;
  width: 42px;
  height: 42px;
  place-items: center;
  background: var(--navy);
  color: white;
  border-radius: 50%;
  font-size: 13px;
  font-weight: 850;
}

.quality-ledger h3 {
  margin: 0 0 8px;
  color: var(--navy);
  font-size: 20px;
  line-height: 1.25;
}

.quality-ledger p {
  margin: 0;
  color: var(--muted);
  font-size: 14px;
}

.card-kicker {
  margin: 4px 0 8px !important;
  color: var(--accent) !important;
  font-size: 12px;
  font-weight: 850;
  text-transform: uppercase;
}

.list {
  margin: 18px 0 0;
  padding: 0;
  list-style: none;
}

.list li {
  position: relative;
  padding-left: 18px;
  color: #323940;
  font-size: 14px;
}

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

.list li::before {
  position: absolute;
  top: 0.7em;
  left: 0;
  width: 6px;
  height: 6px;
  background: var(--accent);
  border-radius: 50%;
  content: "";
}

.band {
  background: #e8ecef;
}

.partner-section {
  overflow: hidden;
  background: white;
}

.logo-marquee {
  position: relative;
  overflow: hidden;
  border-block: 1px solid var(--line);
}

.logo-marquee::before,
.logo-marquee::after {
  position: absolute;
  top: 0;
  bottom: 0;
  z-index: 2;
  width: min(120px, 16vw);
  content: "";
  pointer-events: none;
}

.logo-marquee::before {
  left: 0;
  background: linear-gradient(90deg, white, rgba(255, 255, 255, 0));
}

.logo-marquee::after {
  right: 0;
  background: linear-gradient(270deg, white, rgba(255, 255, 255, 0));
}

.logo-track {
  display: flex;
  width: max-content;
  gap: 14px;
  padding: 18px 0;
  animation: logo-scroll 28s linear infinite;
}

.logo-tile {
  display: grid;
  min-width: 190px;
  height: 74px;
  place-items: center;
  padding: 0 22px;
  background: #f7f8f9;
  border: 1px solid var(--line);
  border-radius: 4px;
  color: var(--navy);
  font-size: 15px;
  font-weight: 850;
  text-align: center;
  text-transform: uppercase;
}

.logo-tile img {
  width: auto;
  max-width: 148px;
  max-height: 54px;
  object-fit: contain;
}

@keyframes logo-scroll {
  from {
    transform: translateX(0);
  }

  to {
    transform: translateX(-50%);
  }
}

.image-band {
  display: grid;
  grid-template-columns: minmax(320px, 0.85fr) minmax(0, 1fr);
  gap: 22px;
  align-items: stretch;
}

.image-band img {
  width: 100%;
  height: 100%;
  min-height: 360px;
  object-fit: cover;
  border-radius: var(--radius);
}

.feature-panel {
  padding: clamp(24px, 3vw, 36px);
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: var(--radius);
}

.feature-panel h2 {
  margin: 0 0 18px;
  color: var(--navy);
  font-size: clamp(26px, 3vw, 40px);
}

.visit-gallery {
  display: grid;
  grid-template-columns: minmax(0, 1.2fr) repeat(2, minmax(0, 0.8fr));
  grid-auto-rows: minmax(210px, 1fr);
  gap: 12px;
}

.visit-card {
  position: relative;
  min-height: 220px;
  margin: 0;
  overflow: hidden;
  border-radius: var(--radius);
  background: var(--ink);
  cursor: zoom-in;
}

.visit-card.large {
  grid-row: span 2;
}

.visit-card img {
  width: 100%;
  height: 100%;
  min-height: inherit;
  object-fit: cover;
  transition: transform 420ms ease;
}

.visit-card:hover img {
  transform: scale(1.035);
}

.visit-card figcaption {
  position: absolute;
  right: 10px;
  bottom: 10px;
  left: 10px;
  padding: 9px 10px;
  background: rgba(18, 20, 23, 0.78);
  color: white;
  border-radius: 4px;
  font-size: 12px;
  font-weight: 780;
}

.quote-band {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 32px;
  background: var(--navy);
  color: white;
}

.quote-band h2,
.quote-band .eyebrow {
  color: white;
}

.quote-band p {
  margin: 0 0 8px;
  color: rgba(255, 255, 255, 0.78);
}

.contact-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(300px, 0.45fr);
  gap: 22px;
  align-items: start;
}

.rfq-form,
.contact-card {
  padding: clamp(20px, 3vw, 34px);
}

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

label span {
  display: block;
  margin-bottom: 8px;
  color: #30363d;
  font-size: 13px;
  font-weight: 800;
}

input,
textarea {
  width: 100%;
  border: 1px solid #cbd1d7;
  background: #fbfcfc;
  border-radius: 4px;
  color: var(--ink);
  font: inherit;
  outline: none;
}

input {
  height: 46px;
  padding: 0 12px;
}

textarea {
  resize: vertical;
  padding: 12px;
}

input:focus,
textarea:focus {
  border-color: var(--accent);
  box-shadow: 0 0 0 3px rgba(184, 48, 43, 0.1);
}

.form-note {
  margin: 0;
  color: var(--muted);
  font-size: 12px;
}

.direct-links {
  display: grid;
  gap: 8px;
  margin-top: 28px;
}

.direct-links a {
  color: var(--accent);
  font-weight: 780;
  word-break: break-word;
}

.site-footer {
  background: #0f1c30;
  color: rgba(255, 255, 255, 0.76);
}

.footer-main {
  display: grid;
  grid-template-columns: minmax(260px, 0.9fr) repeat(3, minmax(160px, 1fr));
  gap: 34px;
  padding: clamp(42px, 6vw, 70px) clamp(18px, 5vw, 72px);
}

.footer-logo {
  width: 210px;
  padding: 0;
  background: transparent;
  border-radius: 0;
}

.company-info-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 18px;
  margin-top: 22px;
}

.company-info {
  padding: clamp(20px, 2.4vw, 30px);
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: var(--radius);
}

.company-info h3 {
  margin: 0 0 14px;
  color: var(--navy);
  font-size: 21px;
}

.company-info dl {
  display: grid;
  gap: 12px;
  margin: 0;
}

.company-info dt {
  color: var(--steel);
  font-size: 12px;
  font-weight: 850;
  text-transform: uppercase;
}

.company-info dd {
  margin: 4px 0 0;
  color: #28313a;
  font-size: 14px;
}

.footer-main h3,
.footer-main h4 {
  margin: 0 0 14px;
  color: white;
}

.footer-main p {
  margin: 0;
}

.footer-main a {
  display: block;
  margin-top: 8px;
  color: rgba(255, 255, 255, 0.82);
}

.footer-bottom {
  display: flex;
  justify-content: space-between;
  gap: 18px;
  padding: 18px clamp(18px, 5vw, 72px);
  border-top: 1px solid rgba(255, 255, 255, 0.12);
  font-size: 13px;
}

.lightbox {
  position: fixed;
  inset: 0;
  z-index: 80;
  display: none;
  place-items: center;
  padding: clamp(18px, 4vw, 42px);
  background: rgba(0, 0, 0, 0.82);
}

.lightbox.is-open {
  display: grid;
}

.lightbox img {
  max-width: min(1100px, 100%);
  max-height: 82vh;
  object-fit: contain;
  border-radius: var(--radius);
  box-shadow: 0 22px 70px rgba(0, 0, 0, 0.45);
}

.lightbox button {
  position: absolute;
  top: 18px;
  right: 18px;
  width: 42px;
  height: 42px;
  border: 1px solid rgba(255, 255, 255, 0.28);
  background: rgba(255, 255, 255, 0.12);
  color: white;
  border-radius: 50%;
  font-size: 24px;
  line-height: 1;
  cursor: pointer;
}

@media (max-width: 1120px) {
  .site-header {
    grid-template-columns: 1fr auto;
  }

  .nav {
    grid-column: 1 / -1;
    justify-content: flex-start;
    overflow-x: auto;
    padding-bottom: 3px;
  }

  .hero,
  .page-hero,
  .image-band,
  .contact-layout,
  .certification-layout {
    grid-template-columns: 1fr;
  }

  .grid-4,
  .grid-3,
  .product-showcase,
  .spec-grid,
  .document-matrix,
  .document-samples,
  .company-info-grid,
  .quality-ledger,
  .footer-main {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (max-width: 720px) {
  .top-strip {
    display: none;
  }

  .site-header {
    gap: 14px;
  }

  .brand-mark {
    width: 128px;
    height: 42px;
  }

  .brand-mark img {
    width: 126px;
  }

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

  h1 {
    font-size: 34px;
  }

  .hero {
    min-height: auto;
  }

  .hero-actions,
  .quote-band,
  .footer-bottom {
    align-items: stretch;
    flex-direction: column;
  }

  .capability-strip,
  .grid-4,
  .grid-3,
  .grid-2,
  .product-showcase,
  .spec-grid,
  .document-matrix,
  .document-samples,
  .evidence-grid,
  .company-info-grid,
  .quality-ledger,
  .certification-layout,
  .footer-main,
  .product-card,
  .visit-gallery {
    grid-template-columns: 1fr;
  }

  .product-card img {
    height: auto;
    min-height: 0;
    aspect-ratio: 16 / 10;
  }

  .visit-card.large {
    grid-row: auto;
  }
}