:root {
  --ink: #111827;
  --muted: #667085;
  --line: #d6dde6;
  --paper: #f7f9fb;
  --steel: #263241;
  --steel-2: #151c25;
  --blue: #1f5f8f;
  --red: #c2412d;
  --silver: #e8edf2;
  --white: #ffffff;
  --shadow: 0 20px 55px rgba(17, 24, 39, 0.14);
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

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

body.nav-locked {
  overflow: hidden;
}

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

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

.site-header {
  position: fixed;
  z-index: 20;
  top: 0;
  left: 0;
  right: 0;
  display: grid;
  grid-template-columns: auto 1fr auto;
  align-items: center;
  gap: 28px;
  min-height: 78px;
  padding: 14px clamp(18px, 4vw, 56px);
  color: var(--white);
  background: rgba(17, 24, 39, 0.78);
  border-bottom: 1px solid rgba(255, 255, 255, 0.14);
  backdrop-filter: blur(18px);
}

.brand {
  display: flex;
  align-items: center;
  gap: 12px;
  font-weight: 800;
  letter-spacing: 0;
  white-space: nowrap;
}

.brand img {
  width: 54px;
  height: 36px;
  object-fit: contain;
  background: var(--white);
  padding: 4px;
  border-radius: 4px;
}

.site-nav {
  display: flex;
  justify-content: center;
  gap: clamp(16px, 2.2vw, 32px);
  font-size: 14px;
  font-weight: 700;
  text-transform: uppercase;
}

.site-nav a {
  color: rgba(255, 255, 255, 0.82);
}

.site-nav a:hover,
.site-nav a[aria-current="page"],
.language-switch a:hover {
  color: var(--white);
}

.language-switch {
  display: flex;
  align-items: center;
  gap: 4px;
  padding: 4px;
  border: 1px solid rgba(255, 255, 255, 0.18);
  background: rgba(255, 255, 255, 0.08);
  border-radius: 6px;
}

.language-switch a {
  min-width: 34px;
  padding: 7px 8px;
  color: rgba(255, 255, 255, 0.76);
  border-radius: 4px;
  font-size: 12px;
  font-weight: 800;
  text-align: center;
}

.language-switch .active {
  color: var(--ink);
  background: var(--white);
}

.nav-toggle {
  display: none;
  width: 42px;
  height: 42px;
  border: 1px solid rgba(255, 255, 255, 0.22);
  border-radius: 6px;
  background: rgba(255, 255, 255, 0.08);
}

.nav-toggle span {
  display: block;
  width: 18px;
  height: 2px;
  margin: 4px auto;
  background: var(--white);
}

.hero {
  position: relative;
  min-height: 92svh;
  display: flex;
  align-items: flex-end;
  padding: 136px clamp(20px, 6vw, 78px) 78px;
  overflow: hidden;
  color: var(--white);
  background: var(--steel-2);
}

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

.hero-media {
  object-fit: cover;
  opacity: 0.58;
}

.hero-shade {
  background:
    linear-gradient(90deg, rgba(8, 12, 18, 0.9) 0%, rgba(8, 12, 18, 0.62) 45%, rgba(8, 12, 18, 0.28) 100%),
    repeating-linear-gradient(135deg, rgba(255, 255, 255, 0.08) 0 1px, transparent 1px 22px);
}

.hero-content {
  position: relative;
  z-index: 1;
  width: min(850px, 100%);
}

.eyebrow,
.section-kicker {
  margin: 0 0 14px;
  color: var(--red);
  font-size: 13px;
  font-weight: 900;
  letter-spacing: 0;
  text-transform: uppercase;
}

.hero h1 {
  max-width: 920px;
  margin: 0;
  font-size: 86px;
  line-height: 0.96;
  letter-spacing: 0;
}

.hero-copy {
  max-width: 670px;
  margin: 26px 0 0;
  color: rgba(255, 255, 255, 0.82);
  font-size: 23px;
  line-height: 1.5;
}

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

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 48px;
  padding: 0 20px;
  border-radius: 6px;
  border: 1px solid transparent;
  font-weight: 850;
  cursor: pointer;
}

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

.button.secondary {
  color: var(--white);
  border-color: rgba(255, 255, 255, 0.42);
  background: rgba(255, 255, 255, 0.08);
}

.metric-strip {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1px;
  background: var(--line);
}

.metric-strip div {
  min-height: 128px;
  padding: 30px clamp(18px, 4vw, 46px);
  background: var(--white);
}

.metric-strip strong {
  display: block;
  color: var(--blue);
  font-size: 38px;
  line-height: 1;
}

.metric-strip span {
  display: block;
  margin-top: 10px;
  color: var(--muted);
  font-weight: 700;
}

.section {
  padding: clamp(70px, 9vw, 118px) clamp(20px, 6vw, 78px);
}

.section-heading {
  display: grid;
  grid-template-columns: minmax(0, 0.95fr) minmax(280px, 0.6fr);
  gap: 36px;
  align-items: end;
  margin-bottom: 34px;
}

.section h2,
.contact-section h2 {
  margin: 0;
  color: var(--ink);
  font-size: 58px;
  line-height: 1.04;
  letter-spacing: 0;
}

.section p,
.contact-section p {
  color: var(--muted);
  font-size: 17px;
  line-height: 1.75;
}

.split-layout {
  display: grid;
  grid-template-columns: minmax(0, 0.9fr) minmax(320px, 0.8fr);
  gap: clamp(34px, 6vw, 82px);
  align-items: center;
}

.split-layout.reverse {
  grid-template-columns: minmax(340px, 0.82fr) minmax(0, 0.9fr);
}

.split-layout.reverse .section-copy {
  order: 2;
}

.image-panel {
  margin: 0;
  padding: 12px;
  background: var(--white);
  border: 1px solid var(--line);
  box-shadow: var(--shadow);
}

.image-panel img {
  width: 100%;
  height: auto;
}

.image-panel figcaption,
.workshop-grid figcaption {
  padding: 14px 4px 2px;
  color: var(--muted);
  font-size: 13px;
  font-weight: 800;
  text-transform: uppercase;
}

.product-section,
.quality-section {
  background:
    linear-gradient(180deg, #f8fafc 0%, #eef2f7 100%);
}

.product-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 18px;
}

.product-card {
  min-height: 330px;
  display: flex;
  flex-direction: column;
  padding: 18px;
  background: var(--white);
  border: 1px solid var(--line);
  border-radius: 8px;
  box-shadow: 0 16px 36px rgba(17, 24, 39, 0.08);
}

.product-card img {
  width: 100%;
  height: 150px;
  object-fit: contain;
  margin-bottom: 20px;
  background: #f5f7fa;
  border-radius: 6px;
}

.product-card h3,
.quality-list span {
  margin: 0 0 10px;
  color: var(--steel);
  font-size: 21px;
}

.product-card p {
  margin: 0;
  font-size: 15px;
  line-height: 1.65;
}

.accent-card {
  justify-content: flex-end;
  color: var(--white);
  background:
    linear-gradient(135deg, var(--steel) 0%, #314153 100%);
  border-color: rgba(255, 255, 255, 0.12);
}

.accent-card h3,
.accent-card p {
  color: var(--white);
}

.product-gallery {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 14px;
  margin-top: 18px;
}

.product-gallery img,
.certificate-grid img {
  width: 100%;
  height: 190px;
  object-fit: contain;
  padding: 14px;
  background: var(--white);
  border: 1px solid var(--line);
  border-radius: 8px;
}

.workshop-section {
  color: var(--white);
  background:
    linear-gradient(180deg, rgba(21, 28, 37, 0.98), rgba(38, 50, 65, 0.98)),
    repeating-linear-gradient(90deg, rgba(255, 255, 255, 0.04) 0 1px, transparent 1px 16px);
}

.workshop-section h2 {
  color: var(--white);
}

.workshop-grid {
  display: grid;
  grid-template-columns: repeat(5, minmax(0, 1fr));
  gap: 14px;
}

.workshop-grid figure {
  margin: 0;
  padding: 10px;
  background: rgba(255, 255, 255, 0.08);
  border: 1px solid rgba(255, 255, 255, 0.16);
  border-radius: 8px;
}

.workshop-grid img {
  width: 100%;
  aspect-ratio: 4 / 3;
  object-fit: contain;
  background: rgba(0, 0, 0, 0.18);
}

.workshop-grid figcaption {
  color: rgba(255, 255, 255, 0.76);
}

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

.quality-list article {
  padding: 12px;
  background: var(--white);
  border: 1px solid var(--line);
  border-radius: 8px;
}

.quality-list img {
  width: 100%;
  aspect-ratio: 4 / 3;
  object-fit: contain;
  background: #f5f7fa;
  border-radius: 6px;
}

.quality-list span {
  display: block;
  margin: 12px 0 2px;
  font-size: 15px;
  font-weight: 850;
}

.certificate-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 18px;
}

.certificate-grid img {
  height: 420px;
}

.contact-section {
  display: grid;
  grid-template-columns: minmax(0, 0.85fr) minmax(340px, 0.65fr);
  gap: clamp(30px, 6vw, 78px);
  padding: clamp(70px, 9vw, 118px) clamp(20px, 6vw, 78px);
  color: var(--white);
  background:
    linear-gradient(135deg, rgba(21, 28, 37, 0.98), rgba(31, 95, 143, 0.92)),
    repeating-linear-gradient(135deg, rgba(255, 255, 255, 0.08) 0 1px, transparent 1px 18px);
}

.contact-section h2,
.contact-section p {
  color: var(--white);
}

.response-note {
  display: inline-flex;
  width: fit-content;
  margin-top: 6px;
  padding: 10px 12px;
  color: var(--white);
  background: rgba(194, 65, 45, 0.92);
  border-radius: 6px;
  font-size: 15px;
  font-weight: 850;
  line-height: 1.35;
}

.copy-block .response-note {
  color: var(--white);
}

.contact-details {
  display: grid;
  gap: 18px;
  margin: 32px 0 0;
}

.contact-details div {
  display: grid;
  grid-template-columns: 92px 1fr;
  gap: 18px;
  padding-top: 18px;
  border-top: 1px solid rgba(255, 255, 255, 0.18);
}

.contact-details dt {
  color: rgba(255, 255, 255, 0.58);
  font-weight: 800;
  text-transform: uppercase;
}

.contact-details dd {
  margin: 0;
  line-height: 1.6;
}

.inquiry-form {
  display: grid;
  gap: 14px;
  padding: 24px;
  color: var(--ink);
  background: var(--white);
  border-radius: 8px;
  box-shadow: var(--shadow);
}

.inquiry-form label {
  display: grid;
  gap: 7px;
  color: var(--steel);
  font-size: 13px;
  font-weight: 850;
  text-transform: uppercase;
}

.inquiry-form input,
.inquiry-form select,
.inquiry-form textarea {
  width: 100%;
  border: 1px solid var(--line);
  border-radius: 6px;
  padding: 13px 12px;
  color: var(--ink);
  background: #f9fbfd;
  font: inherit;
}

.inquiry-form textarea {
  resize: vertical;
}

.site-footer {
  display: flex;
  justify-content: space-between;
  gap: 18px;
  padding: 26px clamp(20px, 6vw, 78px);
  color: rgba(255, 255, 255, 0.66);
  background: #0c1118;
}

.site-footer p {
  margin: 0;
}

.site-footer a {
  color: var(--white);
  font-weight: 800;
}

.page-hero {
  position: relative;
  min-height: 430px;
  display: flex;
  align-items: flex-end;
  padding: 132px clamp(20px, 6vw, 78px) 58px;
  overflow: hidden;
  color: var(--white);
  background: var(--steel-2);
}

.page-hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background:
    linear-gradient(90deg, rgba(8, 12, 18, 0.94), rgba(8, 12, 18, 0.58)),
    repeating-linear-gradient(135deg, rgba(255, 255, 255, 0.08) 0 1px, transparent 1px 20px);
  z-index: 1;
}

.page-hero img {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  opacity: 0.5;
}

.page-hero-content {
  position: relative;
  z-index: 2;
  width: min(920px, 100%);
}

.breadcrumb {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: 18px;
  color: rgba(255, 255, 255, 0.72);
  font-size: 13px;
  font-weight: 800;
  text-transform: uppercase;
}

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

.page-hero h1 {
  margin: 0;
  font-size: 62px;
  line-height: 1.02;
  letter-spacing: 0;
}

.page-hero p {
  max-width: 760px;
  margin: 20px 0 0;
  color: rgba(255, 255, 255, 0.82);
  font-size: 20px;
  line-height: 1.6;
}

.content-shell {
  padding: clamp(58px, 8vw, 96px) clamp(20px, 6vw, 78px);
}

.content-shell.alt {
  background: linear-gradient(180deg, #f8fafc 0%, #eef2f7 100%);
}

.copy-block {
  max-width: 920px;
}

.copy-block h2,
.content-title {
  margin: 0 0 22px;
  color: var(--ink);
  font-size: 42px;
  line-height: 1.08;
  letter-spacing: 0;
}

.copy-block p {
  color: var(--muted);
  font-size: 17px;
  line-height: 1.75;
}

.feature-grid,
.series-grid,
.standards-grid,
.spec-card-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 18px;
}

.feature-card,
.series-card,
.standard-card,
.spec-card {
  padding: 22px;
  background: var(--white);
  border: 1px solid var(--line);
  border-radius: 8px;
  box-shadow: 0 16px 36px rgba(17, 24, 39, 0.08);
}

.feature-card h3,
.series-card h3,
.standard-card h3,
.spec-card h3 {
  margin: 0 0 10px;
  color: var(--steel);
  font-size: 21px;
  line-height: 1.2;
}

.feature-card p,
.series-card p,
.standard-card p,
.spec-card p {
  margin: 0;
  color: var(--muted);
  line-height: 1.65;
}

.faq-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 18px;
}

.faq-item {
  padding: 22px;
  background: var(--white);
  border: 1px solid var(--line);
  border-radius: 8px;
  box-shadow: 0 16px 36px rgba(17, 24, 39, 0.08);
}

.faq-item h3 {
  margin: 0 0 10px;
  color: var(--steel);
  font-size: 20px;
  line-height: 1.25;
}

.faq-item p {
  margin: 0;
  color: var(--muted);
  line-height: 1.7;
}

.series-card {
  display: grid;
  gap: 16px;
}

.series-card img {
  width: 100%;
  height: 170px;
  object-fit: contain;
  padding: 10px;
  background: #f5f7fa;
  border-radius: 6px;
}

.card-link {
  display: inline-flex;
  align-items: center;
  width: fit-content;
  min-height: 38px;
  padding: 0 12px;
  color: var(--white);
  background: var(--blue);
  border-radius: 6px;
  font-size: 13px;
  font-weight: 850;
}

.subseries-list {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 12px;
  margin-top: 26px;
}

.subseries-list a {
  display: flex;
  justify-content: space-between;
  gap: 16px;
  padding: 15px 16px;
  color: var(--steel);
  background: var(--white);
  border: 1px solid var(--line);
  border-radius: 8px;
  font-weight: 800;
}

.subseries-list span {
  color: var(--red);
  font-size: 12px;
  text-transform: uppercase;
}

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

.media-grid figure {
  margin: 0;
  padding: 12px;
  background: var(--white);
  border: 1px solid var(--line);
  border-radius: 8px;
  box-shadow: 0 14px 30px rgba(17, 24, 39, 0.08);
}

.media-grid img {
  width: 100%;
  aspect-ratio: 4 / 3;
  object-fit: contain;
  background: #f5f7fa;
  border-radius: 6px;
}

.media-grid figcaption {
  padding: 13px 2px 2px;
  color: var(--muted);
  font-size: 13px;
  font-weight: 850;
  text-transform: uppercase;
}

.detail-layout {
  display: grid;
  grid-template-columns: minmax(0, 0.74fr) minmax(320px, 0.38fr);
  gap: clamp(28px, 5vw, 62px);
  align-items: start;
}

.detail-panel {
  padding: 24px;
  background: var(--white);
  border: 1px solid var(--line);
  border-radius: 8px;
  box-shadow: var(--shadow);
}

.detail-panel img {
  width: 100%;
  max-height: 360px;
  object-fit: contain;
  margin-bottom: 18px;
  background: #f5f7fa;
  border-radius: 6px;
}

.detail-panel h2 {
  margin: 0 0 12px;
  font-size: 30px;
}

.detail-panel p,
.detail-panel li {
  color: var(--muted);
  line-height: 1.7;
}

.detail-panel ul {
  margin: 0;
  padding-left: 20px;
}

.side-nav {
  display: grid;
  gap: 10px;
  padding: 16px;
  background: var(--steel);
  border-radius: 8px;
}

.side-nav strong {
  color: var(--white);
  padding: 6px 6px 10px;
}

.side-nav a {
  padding: 12px;
  color: rgba(255, 255, 255, 0.76);
  border: 1px solid rgba(255, 255, 255, 0.12);
  border-radius: 6px;
  font-size: 14px;
  font-weight: 800;
}

.side-nav a:hover,
.side-nav a.active {
  color: var(--white);
  background: rgba(255, 255, 255, 0.1);
}

.table-like {
  display: grid;
  gap: 10px;
  margin-top: 18px;
}

.table-like div {
  display: grid;
  grid-template-columns: 160px 1fr;
  gap: 14px;
  padding: 13px 14px;
  background: #f7f9fb;
  border: 1px solid var(--line);
  border-radius: 6px;
}

.table-like dt {
  color: var(--steel);
  font-weight: 850;
}

.table-like dd {
  margin: 0;
  color: var(--muted);
}

.page-contact {
  display: grid;
  grid-template-columns: minmax(0, 0.82fr) minmax(340px, 0.62fr);
  gap: clamp(30px, 6vw, 78px);
  align-items: start;
}

.page-contact .contact-details dt,
.page-contact .contact-details dd {
  color: var(--ink);
}

.page-contact .contact-details div {
  border-top-color: var(--line);
}

.page-contact .inquiry-form {
  box-shadow: 0 16px 36px rgba(17, 24, 39, 0.08);
}

@media (max-width: 1020px) {
  .hero h1 {
    font-size: 58px;
  }

  .hero-copy {
    font-size: 20px;
  }

  .section h2,
  .contact-section h2 {
    font-size: 42px;
  }

  .metric-strip strong {
    font-size: 32px;
  }

  .site-header {
    grid-template-columns: auto auto 1fr;
  }

  .nav-toggle {
    display: block;
    order: 3;
    justify-self: end;
  }

  .site-nav {
    position: absolute;
    top: 78px;
    left: 0;
    right: 0;
    display: none;
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    padding: 10px 20px 20px;
    background: rgba(17, 24, 39, 0.96);
    box-shadow: 0 28px 40px rgba(0, 0, 0, 0.28);
  }

  .site-nav.is-open {
    display: flex;
  }

  .site-nav a {
    padding: 14px 0;
    border-bottom: 1px solid rgba(255, 255, 255, 0.12);
  }

  .language-switch {
    justify-self: end;
  }

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

  .section-heading,
  .split-layout,
  .split-layout.reverse,
  .contact-section,
  .detail-layout,
  .page-contact {
    grid-template-columns: 1fr;
  }

  .page-hero h1 {
    font-size: 46px;
  }

  .feature-grid,
  .series-grid,
  .standards-grid,
  .spec-card-grid,
  .media-grid,
  .faq-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .split-layout.reverse .section-copy {
    order: 0;
  }
}

@media (max-width: 700px) {
  .site-header {
    min-height: 68px;
    grid-template-columns: 1fr auto;
    gap: 12px;
  }

  .brand span {
    display: none;
  }

  .language-switch {
    display: none;
  }

  .site-nav {
    top: 68px;
  }

  .hero {
    min-height: 88svh;
    padding: 110px 20px 48px;
  }

  .hero h1 {
    font-size: 40px;
  }

  .hero-copy {
    font-size: 18px;
  }

  .section h2,
  .contact-section h2 {
    font-size: 31px;
  }

  .metric-strip strong {
    font-size: 26px;
  }

  .metric-strip,
  .product-grid,
  .product-gallery,
  .workshop-grid,
  .quality-list,
  .certificate-grid,
  .feature-grid,
  .series-grid,
  .standards-grid,
  .spec-card-grid,
  .media-grid,
  .faq-grid,
  .subseries-list {
    grid-template-columns: 1fr;
  }

  .page-hero {
    min-height: 360px;
    padding: 104px 20px 42px;
  }

  .page-hero h1 {
    font-size: 34px;
  }

  .page-hero p {
    font-size: 17px;
  }

  .copy-block h2,
  .content-title {
    font-size: 31px;
  }

  .table-like div {
    grid-template-columns: 1fr;
    gap: 4px;
  }

  .certificate-grid img {
    height: auto;
  }

  .contact-details div {
    grid-template-columns: 1fr;
    gap: 6px;
  }

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