/* ==========================================================================
   GOPEX — Nantong Gaopeng Building Materials
   Clean, editorial B2B stylesheet
   ========================================================================== */

:root {
  --ink: #0d1520;
  --ink-soft: #26313f;
  --muted: #64707e;
  --line: #e4e7ec;
  --line-strong: #cfd5dd;
  --bg: #ffffff;
  --bg-soft: #f6f7f9;
  --bg-dark: #0d1520;
  --accent: #b9560f;
  --accent-hover: #9c4709;
  --accent-bright: #e2701f;
  --accent-soft: #fdf1e7;
  --radius: 4px;
  --radius-lg: 10px;
  --shadow: 0 18px 40px -28px rgba(13, 21, 32, .45);
  --container: 1200px;
  --ease: cubic-bezier(.22, .61, .36, 1);
}

* { box-sizing: border-box; }

html { -webkit-text-size-adjust: 100%; scroll-behavior: smooth; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font-family: "Inter", "Helvetica Neue", -apple-system, BlinkMacSystemFont, "Segoe UI",
    "PingFang SC", "Microsoft YaHei", Arial, sans-serif;
  font-size: 16px;
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

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

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

h1, h2, h3, h4 {
  margin: 0;
  font-weight: 600;
  line-height: 1.12;
  letter-spacing: -.02em;
}

p { margin: 0; }

ul { margin: 0; padding: 0; list-style: none; }

::selection { background: var(--accent); color: #fff; }

/* ---------- layout ---------- */
.container {
  width: 100%;
  max-width: var(--container);
  margin: 0 auto;
  padding: 0 28px;
}

.section { padding: 104px 0; }
.section--tight { padding: 72px 0; }
.section--soft { background: var(--bg-soft); }
.section--dark { background: var(--bg-dark); color: #fff; }
.section--top-line { border-top: 1px solid var(--line); }

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-size: 12px;
  font-weight: 600;
  letter-spacing: .16em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 18px;
}

.eyebrow::before {
  content: "";
  width: 26px;
  height: 1px;
  background: currentColor;
  opacity: .6;
}

.section-head { max-width: 720px; margin-bottom: 56px; }

.section-head h2 {
  font-size: clamp(28px, 3.4vw, 44px);
  letter-spacing: -.03em;
}

.section-head p {
  margin-top: 18px;
  color: var(--muted);
  font-size: 17px;
  max-width: 620px;
}

.section-head--row {
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  gap: 40px;
  max-width: none;
}

.section--dark .section-head p,
.section--dark .muted { color: rgba(255, 255, 255, .66); }

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

/* ---------- buttons ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  height: 50px;
  padding: 0 26px;
  border: 1px solid transparent;
  border-radius: var(--radius);
  font-size: 14px;
  font-weight: 600;
  letter-spacing: .02em;
  cursor: pointer;
  white-space: nowrap;
  transition: transform .25s var(--ease), background .25s var(--ease),
    color .25s var(--ease), border-color .25s var(--ease);
}

.btn:hover { transform: translateY(-1px); }

.btn--primary { background: var(--accent); color: #fff; }
.btn--primary:hover { background: var(--accent-hover); }

.btn--ghost { border-color: var(--line-strong); color: var(--ink); background: transparent; }
.btn--ghost:hover { border-color: var(--ink); }

.btn--light { background: #fff; color: var(--ink); }
.btn--light:hover { background: #f1f2f4; }

.btn--outline-light { border-color: rgba(255, 255, 255, .34); color: #fff; }
.btn--outline-light:hover { border-color: #fff; }

.btn .arrow { transition: transform .25s var(--ease); }
.btn:hover .arrow { transform: translateX(3px); }

.link-arrow {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 14px;
  font-weight: 600;
  color: var(--ink);
  border-bottom: 1px solid var(--line-strong);
  padding-bottom: 3px;
  transition: border-color .2s var(--ease), color .2s var(--ease);
}

.link-arrow:hover { color: var(--accent); border-color: var(--accent); }

/* ---------- header ---------- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 60;
  background: rgba(255, 255, 255, .9);
  backdrop-filter: saturate(180%) blur(14px);
  border-bottom: 1px solid transparent;
  transition: border-color .3s var(--ease), box-shadow .3s var(--ease);
}

.site-header.is-stuck {
  border-color: var(--line);
  box-shadow: 0 8px 24px -22px rgba(13, 21, 32, .5);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  height: 78px;
}

.brand { display: flex; align-items: center; gap: 12px; flex-shrink: 0; }
.brand img { height: 34px; width: auto; }
.brand-text { display: none; }

.nav { display: flex; align-items: center; gap: 26px; }

.nav a {
  position: relative;
  font-size: 14.5px;
  font-weight: 500;
  color: var(--ink-soft);
  padding: 6px 0;
  transition: color .2s var(--ease);
}

.nav a::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: 0;
  width: 100%;
  height: 1.5px;
  background: var(--accent);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform .3s var(--ease);
}

.nav a:hover { color: var(--ink); }
.nav a:hover::after,
.nav a.active::after { transform: scaleX(1); }
.nav a.active { color: var(--ink); font-weight: 600; }

.header-actions { display: flex; align-items: center; gap: 14px; }

.lang-switch {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  font-size: 12px;
  letter-spacing: .03em;
  white-space: nowrap;
}

.lang-switch a {
  color: var(--muted);
  padding: 4px 0;
  transition: color .2s var(--ease);
}

.lang-switch a:hover { color: var(--ink); }

.lang-switch a.is-active { color: var(--ink); font-weight: 600; }

.header-cta { height: 42px; padding: 0 20px; font-size: 13.5px; }

.nav-toggle {
  display: none;
  width: 42px;
  height: 42px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: #fff;
  align-items: center;
  justify-content: center;
  cursor: pointer;
}

.nav-toggle span {
  display: block;
  width: 18px;
  height: 1.5px;
  background: var(--ink);
  position: relative;
}

.nav-toggle span::before,
.nav-toggle span::after {
  content: "";
  position: absolute;
  left: 0;
  width: 18px;
  height: 1.5px;
  background: var(--ink);
}

.nav-toggle span::before { top: -6px; }
.nav-toggle span::after { top: 6px; }

.nav-toggle[aria-expanded="true"] span { background: transparent; }
.nav-toggle[aria-expanded="true"] span::before { top: 0; transform: rotate(45deg); }
.nav-toggle[aria-expanded="true"] span::after { top: 0; transform: rotate(-45deg); }

.mobile-menu {
  display: none;
  position: fixed;
  top: 78px;
  left: 0;
  right: 0;
  bottom: 0;
  z-index: 59;
  background: #fff;
  padding: 8px 0 32px;
  overflow-y: auto;
}

.mobile-menu.is-open { display: block; }

.mobile-menu a {
  display: block;
  padding: 14px 0;
  border-bottom: 1px solid var(--line);
  font-size: 16px;
  font-weight: 500;
}

.mobile-menu .btn { margin-top: 20px; width: 100%; }

.mobile-menu .lang-menu {
  margin-top: 24px;
  padding-top: 20px;
  border-top: 1px solid var(--line);
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.mobile-menu .lang-menu-label {
  width: 100%;
  font-size: 11px;
  font-weight: 500;
  letter-spacing: .14em;
  text-transform: uppercase;
  color: var(--muted);
}

.mobile-menu .lang-menu a {
  display: inline-block;
  padding: 7px 14px;
  border: 1px solid var(--line);
  border-radius: 100px;
  font-size: 13.5px;
  font-weight: 500;
  color: var(--ink-soft);
}

.mobile-menu .lang-menu a.is-active {
  background: var(--ink);
  border-color: var(--ink);
  color: #fff;
}

/* ---------- hero ---------- */
.hero {
  position: relative;
  background: var(--bg-soft);
  overflow: hidden;
}

.hero-inner {
  display: grid;
  grid-template-columns: 1.02fr .98fr;
  align-items: center;
  gap: 64px;
  padding-top: 96px;
  padding-bottom: 104px;
}

.hero-copy h1 {
  font-size: clamp(38px, 5.2vw, 66px);
  letter-spacing: -.035em;
  line-height: 1.04;
}

.hero-copy h1 em {
  font-style: normal;
  color: var(--accent);
}

.hero-copy .lead {
  margin-top: 26px;
  font-size: 18px;
  line-height: 1.7;
  color: var(--muted);
  max-width: 520px;
}

.hero-actions { margin-top: 36px; display: flex; flex-wrap: wrap; gap: 14px; }

.hero-meta {
  margin-top: 52px;
  padding-top: 26px;
  border-top: 1px solid var(--line-strong);
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 14px 38px;
  font-size: 13px;
  color: var(--muted);
  max-width: 480px;
}

.hero-meta b { color: var(--ink); font-weight: 600; }

.hero-visual { position: relative; }

.hero-visual img {
  width: 100%;
  aspect-ratio: 4 / 3;
  object-fit: cover;
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow);
}

.hero-badge {
  position: absolute;
  left: -22px;
  bottom: 28px;
  background: #fff;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 16px 20px;
  box-shadow: var(--shadow);
  display: flex;
  gap: 14px;
  align-items: center;
}

.hero-badge strong { display: block; font-size: 20px; letter-spacing: -.02em; }
.hero-badge span { font-size: 12px; color: var(--muted); }

/* ---------- trust strip ---------- */
.trust {
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
  background: #fff;
}

.trust-inner {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
}

.trust-item {
  padding: 26px 24px;
  border-left: 1px solid var(--line);
}

.trust-item:first-child { border-left: 0; padding-left: 0; }

.trust-item b { display: block; font-size: 14px; letter-spacing: -.01em; }
.trust-item span { font-size: 12.5px; color: var(--muted); }

/* ---------- product grid ---------- */
.product-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 26px;
}

.product-card {
  display: flex;
  flex-direction: column;
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  overflow: hidden;
  background: #fff;
  transition: border-color .3s var(--ease), transform .3s var(--ease),
    box-shadow .3s var(--ease);
}

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

.product-card .thumb {
  aspect-ratio: 4 / 3;
  background: var(--bg-soft);
  overflow: hidden;
}

.product-card .thumb img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform .6s var(--ease);
}

.product-card:hover .thumb img { transform: scale(1.05); }

.product-card .body { padding: 22px 22px 24px; flex: 1; display: flex; flex-direction: column; }

.product-card h3 { font-size: 16.5px; letter-spacing: -.01em; }

.product-card p { margin-top: 8px; font-size: 13.5px; color: var(--muted); line-height: 1.55; }

.product-card .meta {
  margin-top: auto;
  padding-top: 18px;
  font-size: 12px;
  letter-spacing: .08em;
  text-transform: uppercase;
  color: var(--accent);
  font-weight: 600;
}

/* ---------- split feature ---------- */
.split {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 72px;
  align-items: center;
}

.split--reverse .split-media { order: 2; }

.split-media img {
  width: 100%;
  border-radius: var(--radius-lg);
  object-fit: cover;
  max-height: 520px;
}

.media-pair {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
}

.media-pair img {
  width: 100%;
  aspect-ratio: 3 / 4;
  object-fit: cover;
  border-radius: var(--radius-lg);
}

.split-body h2 { font-size: clamp(26px, 3vw, 40px); }

.split-body p { margin-top: 20px; color: var(--muted); }

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

.check-list li {
  display: flex;
  gap: 12px;
  font-size: 15px;
  color: var(--ink-soft);
}

.check-list svg { flex-shrink: 0; margin-top: 3px; color: var(--accent); }

/* ---------- feature cards ---------- */
.feature-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1px;
  background: var(--line);
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  overflow: hidden;
}

.feature {
  background: #fff;
  padding: 34px 28px 38px;
}

.feature .num {
  font-size: 12px;
  font-weight: 600;
  letter-spacing: .14em;
  color: var(--accent);
}

.feature h3 { margin-top: 16px; font-size: 17px; }

.feature p { margin-top: 12px; font-size: 14px; color: var(--muted); line-height: 1.65; }

/* ---------- stats ---------- */
.stats {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 32px;
}

.stat b {
  display: block;
  font-size: clamp(34px, 4vw, 52px);
  font-weight: 600;
  letter-spacing: -.04em;
  line-height: 1;
}

.stat span {
  display: block;
  margin-top: 12px;
  font-size: 13.5px;
  color: rgba(255, 255, 255, .6);
}

.section--dark .stat b { color: #fff; }

/* ---------- gallery ---------- */
.gallery {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 16px;
}

.gallery a {
  position: relative;
  display: block;
  overflow: hidden;
  border-radius: var(--radius);
  background: var(--bg-soft);
}

.gallery img {
  width: 100%;
  height: 100%;
  aspect-ratio: 4 / 3;
  object-fit: cover;
  transition: transform .7s var(--ease);
}

.gallery a:hover img { transform: scale(1.04); }

.gallery .cap {
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  padding: 26px 16px 14px;
  font-size: 12.5px;
  color: #fff;
  background: linear-gradient(to top, rgba(13, 21, 32, .82), rgba(13, 21, 32, .28) 60%, transparent);
  opacity: 1;
}

.gallery--tall a:nth-child(1) { grid-row: span 2; }
.gallery--tall a:nth-child(1) img { aspect-ratio: auto; height: 100%; }

/* ---------- certification ---------- */
.cert-grid {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: 20px;
}

.cert-card {
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: #fff;
  overflow: hidden;
  transition: border-color .25s var(--ease), box-shadow .25s var(--ease);
}

.cert-card:hover { border-color: var(--line-strong); box-shadow: var(--shadow); }

.cert-card img {
  width: 100%;
  aspect-ratio: 3 / 4;
  object-fit: cover;
  object-position: top center;
  background: var(--bg-soft);
}

.cert-card .label { padding: 14px 16px 16px; font-size: 13px; line-height: 1.4; }

/* ---------- news ---------- */
.news-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 32px;
}

.post-card {
  display: flex;
  flex-direction: column;
  border-top: 1px solid var(--line-strong);
  padding-top: 22px;
}

.post-card .date {
  font-size: 12px;
  letter-spacing: .1em;
  text-transform: uppercase;
  color: var(--muted);
}

.post-card h3 { margin-top: 12px; font-size: 20px; line-height: 1.3; }

.post-card p { margin-top: 12px; font-size: 14.5px; color: var(--muted); }

.post-card .link-arrow { margin-top: 22px; align-self: flex-start; }

.post-card:hover h3 { color: var(--accent); }

/* ---------- CTA band ---------- */
.cta-band {
  background: var(--bg-dark);
  color: #fff;
  padding: 84px 0;
  position: relative;
  overflow: hidden;
}

.cta-band::after {
  content: "";
  position: absolute;
  right: -120px;
  top: -120px;
  width: 420px;
  height: 420px;
  border-radius: 50%;
  background: radial-gradient(circle at center, rgba(226, 112, 31, .28), transparent 68%);
}

.cta-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 48px;
  position: relative;
  z-index: 1;
}

.cta-inner h2 { font-size: clamp(26px, 3.2vw, 42px); max-width: 640px; }

.cta-inner p { margin-top: 14px; color: rgba(255, 255, 255, .66); max-width: 560px; }

.cta-actions { display: flex; gap: 14px; flex-wrap: wrap; }

/* ---------- page hero ---------- */
.page-hero {
  padding: 74px 0 64px;
  border-bottom: 1px solid var(--line);
  background: var(--bg-soft);
}

.page-hero h1 { font-size: clamp(32px, 4.4vw, 54px); max-width: 900px; }

.page-hero p {
  margin-top: 20px;
  max-width: 640px;
  color: var(--muted);
  font-size: 17px;
}

.breadcrumb {
  display: flex;
  gap: 8px;
  font-size: 12.5px;
  color: var(--muted);
  margin-bottom: 22px;
  letter-spacing: .02em;
}

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

/* ---------- product detail ---------- */
.pd-top {
  display: grid;
  grid-template-columns: 1.06fr .94fr;
  gap: 64px;
  align-items: start;
}

.pd-media {
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  overflow: hidden;
  background: var(--bg-soft);
}

.pd-media img { width: 100%; aspect-ratio: 4 / 3; object-fit: cover; }

.pd-body h1 { font-size: clamp(28px, 3.6vw, 44px); }

.pd-body .lead { margin-top: 20px; color: var(--muted); font-size: 16.5px; }

.pd-tags { display: flex; flex-wrap: wrap; gap: 8px; margin-top: 24px; }

.tag {
  font-size: 12px;
  padding: 6px 12px;
  border: 1px solid var(--line);
  border-radius: 100px;
  color: var(--ink-soft);
  background: #fff;
}

.spec-table { width: 100%; border-collapse: collapse; margin-top: 30px; font-size: 14.5px; }

.spec-table th,
.spec-table td {
  text-align: left;
  padding: 13px 0;
  border-bottom: 1px solid var(--line);
  vertical-align: top;
}

.spec-table th { width: 42%; font-weight: 500; color: var(--muted); }

.pd-note { margin-top: 18px; font-size: 12.5px; color: var(--muted); }

.article h2 { font-size: clamp(22px, 2.4vw, 30px); margin-top: 44px; }
.article h3 { font-size: 19px; margin-top: 32px; }
.article p { margin-top: 16px; color: var(--ink-soft); }
.article ul { margin-top: 16px; display: grid; gap: 10px; }
.article li { padding-left: 18px; position: relative; color: var(--ink-soft); }
.article li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 11px;
  width: 6px;
  height: 1.5px;
  background: var(--accent);
}

.article .check-list { margin-top: 22px; }

.article .check-list li { padding-left: 0; }

.article .check-list li::before { content: none; }

/* ---------- contact ---------- */
.contact-layout {
  display: grid;
  grid-template-columns: .92fr 1.08fr;
  gap: 72px;
  align-items: start;
}

.info-list { margin-top: 34px; display: grid; gap: 26px; }

.info-item .k {
  font-size: 12px;
  letter-spacing: .12em;
  text-transform: uppercase;
  color: var(--muted);
}

.info-item .v { margin-top: 6px; font-size: 16px; }

.info-item a.v:hover { color: var(--accent); }

.form {
  display: grid;
  gap: 18px;
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  padding: 34px;
  background: #fff;
}

.field { display: grid; gap: 8px; }

.field label { font-size: 13px; font-weight: 500; color: var(--ink-soft); }

.field input,
.field textarea,
.field select {
  width: 100%;
  border: 1px solid var(--line-strong);
  border-radius: var(--radius);
  padding: 13px 14px;
  font: inherit;
  font-size: 14.5px;
  background: #fff;
  color: var(--ink);
  transition: border-color .2s var(--ease), box-shadow .2s var(--ease);
}

.field input:focus,
.field textarea:focus,
.field select:focus {
  outline: none;
  border-color: var(--accent);
  box-shadow: 0 0 0 3px var(--accent-soft);
}

.field textarea { min-height: 132px; resize: vertical; }

.field-row { display: grid; grid-template-columns: 1fr 1fr; gap: 18px; }

.form .hint { font-size: 12.5px; color: var(--muted); }

/* ---------- footer ---------- */
.site-footer { background: #0a1119; color: rgba(255, 255, 255, .7); padding: 72px 0 32px; }

.footer-top {
  display: grid;
  grid-template-columns: 1.5fr 1fr 1fr 1.2fr;
  gap: 48px;
  padding-bottom: 54px;
  border-bottom: 1px solid rgba(255, 255, 255, .1);
}

.footer-brand img { height: auto; max-height: 34px; width: auto; filter: brightness(0) invert(1); opacity: .95; }

.footer-brand p { margin-top: 20px; font-size: 14px; max-width: 320px; line-height: 1.7; }

.footer-col h4 {
  font-size: 12px;
  letter-spacing: .14em;
  text-transform: uppercase;
  color: #fff;
  margin-bottom: 18px;
}

.footer-col a,
.footer-col p { display: block; font-size: 14px; margin-bottom: 10px; color: rgba(255, 255, 255, .66); }

.footer-col a:hover { color: #fff; }

.footer-bottom {
  padding-top: 26px;
  display: flex;
  justify-content: space-between;
  gap: 20px;
  font-size: 12.5px;
  color: rgba(255, 255, 255, .45);
  flex-wrap: wrap;
}

/* ---------- reveal ---------- */
.reveal {
  opacity: 0;
  transform: translateY(18px);
  transition: opacity .7s var(--ease), transform .7s var(--ease);
}

.reveal.is-in { opacity: 1; transform: none; }

/* ---------- lightbox ---------- */
.lightbox {
  position: fixed;
  inset: 0;
  z-index: 200;
  background: rgba(9, 14, 20, .93);
  display: none;
  align-items: center;
  justify-content: center;
  padding: 40px;
  cursor: zoom-out;
}

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

.lightbox img { max-width: 92vw; max-height: 88vh; width: auto; border-radius: 2px; }

/* ---------- timeline ---------- */
.timeline { display: grid; gap: 22px; }

.timeline .tl-item {
  display: grid;
  grid-template-columns: 96px 1fr;
  gap: 24px;
  padding: 22px 0;
  border-top: 1px solid var(--line);
}

.timeline .year { font-weight: 700; color: var(--accent); }

.timeline .tl-item:last-child { border-bottom: 1px solid var(--line); }

.timeline .tl-item h3 { margin: 0 0 6px; }

/* ---------- responsive ---------- */
@media (max-width: 1180px) {
  .header-cta { display: none; }
  .nav { gap: 22px; }
}

@media (max-width: 1080px) {
  .nav { gap: 18px; }
  .nav a { font-size: 14px; }
  .product-grid { grid-template-columns: repeat(3, 1fr); }
  .feature-grid { grid-template-columns: repeat(2, 1fr); }
  .cert-grid { grid-template-columns: repeat(4, 1fr); }
  .stats { gap: 24px; }
  .hero-inner { gap: 44px; }
}

@media (max-width: 900px) {
  .section { padding: 72px 0; }
  .nav, .header-cta { display: none; }
  .nav-toggle { display: inline-flex; }
  .lang-switch { display: none; }
  .hero-inner { grid-template-columns: 1fr; padding-top: 56px; padding-bottom: 64px; gap: 40px; }
  .hero-badge { left: 16px; bottom: 16px; }
  .split, .pd-top, .contact-layout { grid-template-columns: 1fr; gap: 40px; }
  .split--reverse .split-media { order: 0; }
  .trust-inner { grid-template-columns: repeat(2, 1fr); }
  .trust-item:nth-child(3) { border-left: 0; padding-left: 0; }
  .trust-item { border-top: 1px solid var(--line); }
  .trust-item:nth-child(-n+2) { border-top: 0; }
  .product-grid { grid-template-columns: repeat(2, 1fr); }
  .gallery { grid-template-columns: repeat(2, 1fr); }
  .gallery--tall a:nth-child(1) { grid-row: auto; }
  .gallery--tall a:nth-child(1) img { height: auto; aspect-ratio: 4/3; }
  .news-grid { grid-template-columns: 1fr; gap: 26px; }
  .cta-inner { flex-direction: column; align-items: flex-start; }
  .footer-top { grid-template-columns: 1fr 1fr; gap: 34px; }
  .section-head--row { flex-direction: column; align-items: flex-start; gap: 20px; }
  .cert-grid { grid-template-columns: repeat(3, 1fr); }
  .field-row { grid-template-columns: 1fr; }
  .form { padding: 24px; }
}

/* tablets / small laptops: tighter nav beside the language links */
@media (min-width: 902px) and (max-width: 1199px) {
  .header-inner { gap: 16px; }
  .nav { gap: 14px; }
  .nav a { font-size: 13.5px; }
  .lang-switch { gap: 8px; font-size: 11.5px; }
}

@media (max-width: 560px) {
  .timeline .tl-item { grid-template-columns: 1fr; gap: 6px; }
  .container { padding: 0 18px; }
  .brand img { height: 26px; }
  .header-inner { height: 68px; }
  .mobile-menu { top: 68px; }
  .product-grid { grid-template-columns: 1fr; }
  .feature-grid { grid-template-columns: 1fr; }
  .cert-grid { grid-template-columns: repeat(2, 1fr); }
  .stats { grid-template-columns: 1fr 1fr; gap: 28px 20px; }
  .page-hero { padding: 52px 0 44px; }
  .section { padding: 60px 0; }
  .hero-meta { gap: 12px 20px; }
}

@media (prefers-reduced-motion: reduce) {
  * { animation: none !important; transition: none !important; }
  .reveal { opacity: 1; transform: none; }
  html { scroll-behavior: auto; }
}