:root {
  --bg-main: #edf2f5;
  --bg-section: #f6f8f9;
  --bg-card: #ffffff;
  --bg-warm: #f4f0e9;
  --bg-blue: #e6edf1;
  --line: #d3dde3;
  --line-strong: #bdcbd4;

  --text-main: #213440;
  --text-title: #294455;
  --text-body: #5b6c77;
  --text-muted: #7a8992;

  --brand-red: #b53b33;
  --brand-red-dark: #8f2d28;
  --brand-red-soft: #f4e8e6;
  --industrial-blue: #587286;
  --industrial-blue-dark: #334e5f;
  --industrial-blue-soft: #dfe8ed;
  --accent-gold: #9d7b42;

  --footer-bg: #344c5b;
  --footer-text: #eef3f5;
  --shadow-sm: 0 8px 22px rgba(42, 66, 80, .07);
  --shadow-md: 0 18px 44px rgba(42, 66, 80, .10);
  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 16px;
  --max: 1200px;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; scroll-padding-top: 86px; }
body {
  margin: 0;
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  color: var(--text-main);
  background: var(--bg-main);
  line-height: 1.65;
  text-rendering: optimizeLegibility;
  overflow-x: hidden;
  -webkit-text-size-adjust: 100%;
}
body.menu-open { overflow: hidden; }
body.menu-open::before {
  content: "";
  position: fixed;
  inset: 82px 0 0;
  z-index: 39;
  background: rgba(33, 52, 64, .32);
  backdrop-filter: blur(2px);
}
a { color: inherit; text-decoration: none; }
button, input, textarea { font: inherit; }
img { display: block; max-width: 100%; }
.container { width: min(calc(100% - 48px), var(--max)); margin: 0 auto; }

.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  background: rgba(255, 255, 255, .96);
  border-bottom: 1px solid var(--line);
  box-shadow: 0 3px 14px rgba(42, 66, 80, .045);
  backdrop-filter: blur(12px);
}
.nav-wrap { min-height: 82px; display: flex; align-items: center; gap: 28px; }
.brand { margin-right: auto; display: flex; flex-direction: column; line-height: 1.02; }
.brand-word {
  color: var(--brand-red);
  font-family: Georgia, "Times New Roman", serif;
  font-size: 2rem;
  font-weight: 700;
  font-style: italic;
  letter-spacing: .035em;
}
.brand small { color: var(--text-body); font-size: .76rem; margin-top: 6px; letter-spacing: .015em; }
.nav-links { display: flex; gap: 24px; align-items: center; font-weight: 720; font-size: .92rem; }
.nav-links a { position: relative; padding: 30px 0 27px; color: var(--text-title); }
.nav-links a::after {
  content: "";
  position: absolute;
  left: 0;
  right: 100%;
  bottom: 20px;
  height: 2px;
  background: var(--brand-red);
  transition: right .18s ease;
}
.nav-links a:hover { color: var(--brand-red); }
.nav-links a:hover::after { right: 0; }
.lang-toggle, .menu-toggle {
  border: 1px solid var(--line-strong);
  background: #fff;
  color: var(--text-title);
  border-radius: var(--radius-sm);
  padding: 9px 14px;
  cursor: pointer;
  font-weight: 760;
}
.lang-toggle:hover, .menu-toggle:hover { border-color: var(--industrial-blue); background: var(--bg-section); }
.menu-toggle { display: none; gap: 7px; align-items: center; }
.menu-icon { font-size: 1rem; line-height: 1; }

.section { padding: 96px 0; }
.section-tight { padding: 78px 0 92px; }
.section-label, .eyebrow {
  margin-bottom: 14px;
  color: var(--brand-red);
  font-size: .76rem;
  font-weight: 850;
  letter-spacing: .18em;
}
h1, h2, h3 { line-height: 1.18; margin-top: 0; color: var(--text-title); }
h1 { font-size: clamp(2.75rem, 5vw, 4.65rem); letter-spacing: -.043em; margin-bottom: 24px; max-width: 830px; }
h2 { font-size: clamp(2rem, 3.5vw, 3.15rem); letter-spacing: -.032em; margin-bottom: 24px; max-width: 900px; }
h3 { font-size: 1.25rem; }
.hero-text, .section-intro { max-width: 820px; color: var(--text-body); font-size: 1.07rem; }

.hero {
  position: relative;
  overflow: hidden;
  background:
    radial-gradient(circle at 86% 12%, rgba(181, 59, 51, .07), transparent 27%),
    linear-gradient(120deg, #e8eef2 0%, #f2f4f3 52%, #f4f0e9 100%);
  border-bottom: 1px solid var(--line);
}
.hero::before {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  background-image:
    linear-gradient(rgba(88, 114, 134, .035) 1px, transparent 1px),
    linear-gradient(90deg, rgba(88, 114, 134, .035) 1px, transparent 1px);
  background-size: 48px 48px;
  mask-image: linear-gradient(to right, rgba(0,0,0,.55), transparent 75%);
}
.hero-grid { position: relative; display: grid; grid-template-columns: 1.02fr .98fr; gap: 60px; align-items: center; }
.hero-copy { position: relative; z-index: 1; }
.hero-actions { display: flex; flex-wrap: wrap; gap: 12px; margin: 32px 0; }
.button {
  min-height: 48px;
  padding: 0 22px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border-radius: var(--radius-sm);
  border: 1px solid transparent;
  font-weight: 800;
  transition: transform .16s ease, background-color .16s ease, border-color .16s ease;
}
.button:hover { transform: translateY(-1px); }
.button.primary { background: var(--brand-red); color: #fff; box-shadow: 0 8px 18px rgba(181, 59, 51, .16); }
.button.primary:hover { background: var(--brand-red-dark); }
.button.secondary { color: var(--industrial-blue-dark); border-color: var(--line-strong); background: rgba(255,255,255,.72); }
.button.secondary:hover { background: #fff; border-color: var(--industrial-blue); }
.button.outline { background: transparent; color: var(--industrial-blue-dark); border-color: rgba(51,78,95,.4); }
.button.outline:hover { background: rgba(88,114,134,.07); }
.trust-row { display: flex; flex-wrap: wrap; gap: 10px; color: var(--text-body); font-size: .86rem; }
.trust-row span {
  padding: 8px 12px;
  background: rgba(255,255,255,.72);
  border: 1px solid rgba(189,203,212,.9);
  border-radius: 999px;
}
.trust-row span::before { content: "✓"; color: var(--brand-red); margin-right: 7px; font-weight: 900; }
.hero-media {
  position: relative;
  z-index: 1;
  margin: 0;
  background: #fff;
  border: 1px solid var(--line-strong);
  border-radius: var(--radius-lg);
  padding: 10px;
  box-shadow: var(--shadow-md);
}
.hero-media::before {
  content: "CASTSUN";
  position: absolute;
  top: 24px;
  left: 24px;
  z-index: 2;
  padding: 7px 11px;
  border-radius: 6px;
  color: #fff;
  background: rgba(181,59,51,.92);
  font-family: Georgia, "Times New Roman", serif;
  font-weight: 700;
  letter-spacing: .04em;
}
.hero-media img { width: 100%; aspect-ratio: 5 / 3; object-fit: cover; border-radius: 10px; }
.hero-media figcaption { color: var(--text-body); font-size: .82rem; padding: 10px 8px 3px; }

.about-section { background: #fff; }
.about-grid { display: grid; grid-template-columns: .78fr 1.22fr; gap: 78px; }
.about-grid > div:first-child { position: relative; padding-top: 2px; }
.about-grid > div:first-child::before {
  content: "";
  display: block;
  width: 58px;
  height: 3px;
  margin-bottom: 22px;
  background: var(--brand-red);
}
.about-copy > p { color: var(--text-body); font-size: 1.055rem; }
.philosophy {
  margin: 28px 0 0;
  padding: 21px 24px;
  border-left: 4px solid var(--brand-red);
  background: var(--bg-section);
  border-radius: 0 var(--radius-md) var(--radius-md) 0;
  color: var(--industrial-blue-dark);
  font-weight: 730;
}
.fact-row { display: grid; grid-template-columns: repeat(3, 1fr); gap: 12px; margin-top: 32px; }
.fact-row.four-facts { grid-template-columns: repeat(4, 1fr); }
.fact-row div {
  background: var(--bg-section);
  border: 1px solid var(--line);
  border-top: 3px solid var(--industrial-blue);
  border-radius: var(--radius-md);
  padding: 19px;
}
.fact-row strong, .fact-row span { display: block; }
.fact-row strong { color: var(--text-title); font-size: 1.33rem; }
.fact-row span { color: var(--text-body); font-size: .8rem; margin-top: 4px; }

.muted { background: var(--bg-blue); border-top: 1px solid var(--line); border-bottom: 1px solid var(--line); }
.metric-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 24px; margin-top: 42px; }
.metric-card {
  position: relative;
  overflow: hidden;
  background: #fff;
  border: 1px solid var(--line);
  border-radius: var(--radius-md);
  padding: 34px;
  box-shadow: var(--shadow-sm);
}
.metric-card::before { content: ""; position: absolute; top: 0; left: 0; width: 5px; height: 100%; background: var(--brand-red); }
.metric-value { display: block; color: var(--industrial-blue-dark); font-size: clamp(2.25rem, 4vw, 3.75rem); line-height: 1; font-weight: 880; letter-spacing: -.04em; margin-bottom: 22px; }
.metric-card p { color: var(--text-body); margin-bottom: 0; }
.process-flow { display: grid; grid-template-columns: repeat(5, 1fr); gap: 10px; margin-top: 28px; }
.process-flow div {
  position: relative;
  padding: 18px 14px;
  text-align: center;
  background: rgba(255,255,255,.72);
  border: 1px solid var(--line);
  border-radius: var(--radius-sm);
}
.process-flow div:not(:last-child)::after {
  content: "";
  position: absolute;
  top: 50%;
  right: -11px;
  width: 11px;
  height: 1px;
  background: var(--line-strong);
}
.process-flow span { display: block; color: var(--brand-red); font-weight: 850; font-size: .76rem; margin-bottom: 7px; }
.process-flow strong { font-size: .87rem; color: var(--text-title); }
.workshop-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 18px; margin-top: 34px; }
.workshop-grid img { width: 100%; aspect-ratio: 4 / 3; object-fit: cover; border-radius: var(--radius-md); border: 1px solid var(--line); box-shadow: var(--shadow-sm); }

#products { background: var(--bg-section); }
.product-grid { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 22px; margin-top: 42px; }
.product-card {
  overflow: hidden;
  background: #fff;
  border: 1px solid var(--line);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-sm);
  transition: transform .18s ease, box-shadow .18s ease, border-color .18s ease;
}
.product-card:hover { transform: translateY(-3px); box-shadow: var(--shadow-md); border-color: var(--line-strong); }
.product-card > img { width: 100%; aspect-ratio: 16 / 10; object-fit: contain; background: #f7f7f5; border-bottom: 1px solid var(--line); }
.product-body { padding: 22px; }
.product-body h3 { margin-bottom: 10px; }
.product-body p { color: var(--text-body); margin-bottom: 0; font-size: .94rem; }
.product-card:last-child:nth-child(odd) { grid-column: auto; width: auto; justify-self: auto; }

.quality-section { background: #fff; border-top: 1px solid var(--line); }
.quality-section .container { position: relative; }
.quality-section .container::before {
  content: "";
  position: absolute;
  right: 0;
  top: -18px;
  width: 110px;
  height: 3px;
  background: var(--brand-red);
}
.quality-intro { max-width: 760px; color: var(--text-body); }
.certificate-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 26px; margin-top: 38px; }
.certificate-card {
  position: relative;
  display: grid;
  grid-template-columns: 176px 1fr;
  gap: 24px;
  align-items: center;
  background: var(--bg-section);
  border: 1px solid var(--line);
  border-radius: var(--radius-md);
  padding: 20px;
  box-shadow: var(--shadow-sm);
}
.certificate-card::after { content: "CERTIFIED"; position: absolute; top: 18px; right: 20px; color: var(--text-muted); font-size: .68rem; font-weight: 850; letter-spacing: .15em; }
.certificate-card img { width: 100%; border-radius: 6px; border: 1px solid var(--line-strong); }
.certificate-card p { color: var(--text-body); }
.text-link { color: var(--brand-red); font-weight: 800; border-bottom: 1px solid rgba(181,59,51,.32); }
.text-link:hover { color: var(--brand-red-dark); border-bottom-color: var(--brand-red-dark); }

.recognition-section { background: var(--bg-warm); border-top: 1px solid #e0d9cf; border-bottom: 1px solid #e0d9cf; }
.recognition-intro { max-width: 860px; color: var(--text-body); }
.recognition-grid { display: grid; grid-template-columns: repeat(3, minmax(0,1fr)); gap: 22px; margin-top: 38px; }
.recognition-card { overflow: hidden; background: #fff; border: 1px solid #ddd4c9; border-radius: var(--radius-md); box-shadow: 0 10px 26px rgba(74,67,58,.065); }
.recognition-card img { width: 100%; aspect-ratio: 842 / 595; object-fit: contain; background: #f7f3ec; border-bottom: 1px solid #e0d8ce; }
.recognition-card div { padding: 20px 22px 22px; }
.recognition-card h3 { margin-bottom: 8px; font-size: 1.06rem; }
.recognition-card p { margin: 0; color: var(--text-body); font-size: .9rem; }

.contact-section { background: var(--bg-blue); }
.contact-grid { display: grid; grid-template-columns: .9fr 1.1fr; gap: 72px; align-items: start; }
.contact-grid > div:first-child p { color: var(--text-body); }
.contact-card { background: #fff; border: 1px solid var(--line); border-radius: var(--radius-md); padding: 30px; box-shadow: var(--shadow-md); }
.contact-card h3 { padding-bottom: 15px; border-bottom: 2px solid var(--brand-red); }
.contact-card address { font-style: normal; color: var(--text-body); padding-bottom: 22px; border-bottom: 1px solid var(--line); }
.contact-card dl { margin: 22px 0 0; }
.contact-card dl div { display: grid; grid-template-columns: 110px 1fr; gap: 16px; padding: 9px 0; border-bottom: 1px solid rgba(211,221,227,.55); }
.contact-card dl div:last-child { border-bottom: 0; }
.contact-card dt { color: var(--text-body); }
.contact-card dd { margin: 0; font-weight: 720; color: var(--text-title); }
.contact-card dd a { color: var(--industrial-blue-dark); border-bottom: 1px solid rgba(51,78,95,.28); }
.contact-card dd a:hover { color: var(--brand-red); border-bottom-color: rgba(181,59,51,.42); }
.contact-actions { display: flex; flex-wrap: wrap; gap: 12px; margin-top: 26px; }

.mobile-rfq { display: none; }
footer { padding: 30px 0; color: var(--footer-text); background: var(--footer-bg); }
.footer-wrap { display: flex; justify-content: space-between; gap: 20px; align-items: center; font-size: .88rem; }

@media (max-width: 1050px) {
  .menu-toggle { display: inline-flex; }
  .nav-wrap { position: relative; }
  .nav-links {
    display: none;
    position: fixed;
    z-index: 45;
    top: 92px;
    left: 20px;
    right: 20px;
    max-height: calc(100dvh - 112px);
    overflow-y: auto;
    padding: 14px;
    flex-direction: column;
    align-items: stretch;
    gap: 2px;
    background: #fff;
    border: 1px solid var(--line);
    border-radius: var(--radius-md);
    box-shadow: 0 24px 60px rgba(33, 52, 64, .18);
  }
  .nav-links.open { display: flex; }
  .nav-links a {
    min-height: 46px;
    display: flex;
    align-items: center;
    padding: 10px 12px;
    border-radius: 7px;
  }
  .nav-links a:hover { background: var(--bg-section); }
  .nav-links a::after { display: none; }
  .hero-grid, .about-grid, .contact-grid { grid-template-columns: 1fr; gap: 38px; }
  .hero-copy { max-width: 780px; }
  .fact-row.four-facts { grid-template-columns: repeat(2, 1fr); }
  .process-flow { grid-template-columns: repeat(3, 1fr); }
  .process-flow div::after { display: none; }
  .certificate-card { grid-template-columns: 140px 1fr; }
  .product-grid { grid-template-columns: repeat(2, minmax(0,1fr)); }
}

@media (max-width: 720px) {
  html { scroll-padding-top: 70px; }
  body.menu-open::before { inset-block-start: 68px; }
  .container { width: min(calc(100% - 28px), var(--max)); }
  .site-header { backdrop-filter: blur(16px); }
  .nav-wrap { min-height: 68px; gap: 9px; }
  .brand { min-width: 0; }
  .brand-word { font-size: 1.6rem; letter-spacing: .025em; }
  .brand small {
    max-width: 190px;
    margin-top: 4px;
    overflow: hidden;
    white-space: nowrap;
    text-overflow: ellipsis;
    font-size: .66rem;
  }
  .lang-toggle, .menu-toggle {
    min-height: 40px;
    padding: 7px 10px;
    font-size: .8rem;
  }
  .menu-toggle { min-width: 42px; justify-content: center; }
  .nav-links { top: 76px; left: 12px; right: 12px; max-height: calc(100dvh - 90px); }

  .section { padding: 58px 0; }
  .section-tight { padding: 42px 0 58px; }
  .section-label, .eyebrow { margin-bottom: 10px; font-size: .68rem; letter-spacing: .13em; }
  h1 { font-size: clamp(2.1rem, 9.4vw, 2.75rem); line-height: 1.08; letter-spacing: -.038em; margin-bottom: 18px; }
  h2 { font-size: clamp(1.72rem, 7.3vw, 2.2rem); line-height: 1.14; margin-bottom: 18px; }
  h3 { font-size: 1.08rem; }
  .hero-text, .section-intro, .about-copy > p { font-size: .96rem; line-height: 1.62; }

  .hero { background: linear-gradient(145deg, #e8eef2 0%, #f4f5f3 62%, #f4f0e9 100%); }
  .hero::before { opacity: .45; background-size: 34px 34px; }
  .hero-grid { gap: 26px; }
  .hero-actions { display: grid; grid-template-columns: 1fr; gap: 10px; margin: 24px 0; }
  .button { width: 100%; min-height: 48px; padding-inline: 16px; }
  .trust-row { display: grid; grid-template-columns: 1fr 1fr; gap: 8px; font-size: .74rem; }
  .trust-row span { min-width: 0; padding: 8px 9px; text-align: center; }
  .trust-row span:last-child:nth-child(odd) { grid-column: 1 / -1; }
  .hero-media { padding: 7px; border-radius: 12px; box-shadow: 0 14px 34px rgba(42, 66, 80, .11); }
  .hero-media::before { top: 15px; left: 15px; padding: 5px 8px; font-size: .75rem; }
  .hero-media img { aspect-ratio: 16 / 10; border-radius: 7px; }
  .hero-media figcaption { display: none; }

  .about-grid { gap: 18px; }
  .about-grid > div:first-child::before { width: 44px; margin-bottom: 16px; }
  .philosophy { margin-top: 20px; padding: 16px 17px; font-size: .92rem; }
  .fact-row, .fact-row.four-facts { grid-template-columns: repeat(2, minmax(0,1fr)); gap: 9px; margin-top: 24px; }
  .fact-row div { min-height: 96px; padding: 14px 12px; }
  .fact-row strong { font-size: 1.05rem; line-height: 1.15; overflow-wrap: anywhere; }
  .fact-row span { font-size: .72rem; line-height: 1.35; }

  .metric-grid { grid-template-columns: 1fr; gap: 14px; margin-top: 28px; }
  .metric-card { padding: 24px 21px; }
  .metric-card::before { width: 4px; }
  .metric-value { font-size: 2.15rem; margin-bottom: 16px; }
  .metric-card p { font-size: .9rem; }
  .process-flow { grid-template-columns: repeat(2, minmax(0,1fr)); gap: 8px; margin-top: 18px; }
  .process-flow div { min-height: 88px; display: flex; flex-direction: column; justify-content: center; padding: 13px 8px; }
  .process-flow div:last-child:nth-child(odd) { grid-column: 1 / -1; }
  .process-flow strong { font-size: .78rem; line-height: 1.25; }
  .workshop-grid { grid-template-columns: repeat(2, minmax(0,1fr)); gap: 10px; margin-top: 22px; }
  .workshop-grid img { aspect-ratio: 4 / 3; border-radius: 9px; }
  .workshop-grid img:first-child { grid-column: 1 / -1; aspect-ratio: 16 / 9; }

  .product-grid { grid-template-columns: repeat(2, minmax(0,1fr)); gap: 11px; margin-top: 28px; }
  .product-card { border-radius: 10px; }
  .product-card:hover { transform: none; box-shadow: var(--shadow-sm); }
  .product-card > img { aspect-ratio: 4 / 3; }
  .product-body { padding: 13px 12px 14px; }
  .product-body h3 { margin-bottom: 7px; font-size: .94rem; line-height: 1.25; }
  .product-body p {
    display: -webkit-box;
    overflow: hidden;
    -webkit-line-clamp: 3;
    -webkit-box-orient: vertical;
    font-size: .76rem;
    line-height: 1.42;
  }

  .quality-section .container::before { width: 64px; top: -12px; }
  .certificate-grid { grid-template-columns: 1fr; gap: 13px; margin-top: 26px; }
  .certificate-card { grid-template-columns: 92px 1fr; gap: 14px; padding: 14px; }
  .certificate-card img { width: 92px; max-width: none; margin: 0; }
  .certificate-card h3 { margin-bottom: 6px; font-size: 1rem; }
  .certificate-card p { margin: 0 0 8px; font-size: .77rem; line-height: 1.42; }
  .certificate-card .text-link { font-size: .78rem; }
  .certificate-card::after { display: none; }

  .recognition-grid { grid-template-columns: repeat(2, minmax(0,1fr)); gap: 11px; margin-top: 26px; }
  .recognition-card { border-radius: 10px; }
  .recognition-card img { aspect-ratio: 4 / 3; }
  .recognition-card div { padding: 12px; }
  .recognition-card h3 { margin-bottom: 5px; font-size: .82rem; line-height: 1.28; }
  .recognition-card p { font-size: .7rem; line-height: 1.35; }

  .contact-grid { gap: 26px; }
  .contact-actions { display: grid; grid-template-columns: 1fr; gap: 9px; margin-top: 20px; }
  .contact-card { padding: 20px 17px; border-radius: 11px; box-shadow: var(--shadow-sm); }
  .contact-card h3 { margin-bottom: 16px; padding-bottom: 12px; }
  .contact-card address { font-size: .86rem; line-height: 1.55; }
  .contact-card dl { margin-top: 14px; }
  .contact-card dl div { grid-template-columns: 84px minmax(0,1fr); gap: 9px; padding: 8px 0; font-size: .82rem; }
  .contact-card dd { overflow-wrap: anywhere; }

  footer { padding: 24px 0 calc(82px + env(safe-area-inset-bottom)); }
  .footer-wrap { flex-direction: column; align-items: flex-start; gap: 5px; font-size: .78rem; }
  .mobile-rfq {
    position: fixed;
    z-index: 60;
    left: 12px;
    right: 12px;
    bottom: calc(10px + env(safe-area-inset-bottom));
    min-height: 54px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 12px;
    padding: 10px 16px;
    color: #fff;
    background: var(--brand-red);
    border: 1px solid rgba(255,255,255,.18);
    border-radius: 12px;
    box-shadow: 0 14px 34px rgba(80, 39, 35, .27);
  }
  .mobile-rfq span { font-weight: 850; }
  .mobile-rfq strong { min-width: 0; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; font-size: .75rem; font-weight: 650; opacity: .9; }
}

@media (max-width: 430px) {
  .brand small { display: none; }
  .nav-wrap { gap: 7px; }
  .lang-toggle { padding-inline: 9px; }
  .menu-label { display: none; }
  .menu-icon { font-size: 1.1rem; }
  .contact-card dl div { grid-template-columns: 1fr; gap: 2px; }
}

@media (max-width: 350px) {
  .container { width: min(calc(100% - 20px), var(--max)); }
  .product-grid, .recognition-grid { grid-template-columns: 1fr; }
  .certificate-card { grid-template-columns: 1fr; }
  .certificate-card img { width: 150px; margin-inline: auto; }
  .mobile-rfq strong { display: none; }
}

@media (prefers-reduced-motion: reduce) {
  * { scroll-behavior: auto !important; transition: none !important; }
}


/* Mobile usability and hero image refinement — build 20260801-1020 */
section[id] { scroll-margin-top: 104px; }
.hero-grid { gap: 46px; }
.hero-media::before { display: none; }
.hero-media picture { display: block; }
.hero-media img { aspect-ratio: 16 / 9; object-fit: cover; object-position: center; }
@media (min-width: 1051px) {
  h1 { font-size: clamp(2.65rem, 4.45vw, 4.2rem); max-width: 760px; }
}

@media (max-width: 720px) {
  html { scroll-padding-top: 94px; }
  section[id] { scroll-margin-top: 94px; }
  .nav-wrap { min-height: 62px; }
  .brand-word { font-size: 1.42rem; }
  .lang-toggle, .menu-toggle { min-height: 38px; padding: 6px 9px; }
  .nav-links { top: 70px; max-height: calc(100dvh - 82px); }
  .section { padding: 52px 0; }
  .section-tight { padding: 32px 0 48px; }
  .hero-grid { gap: 22px; }
  .hero-media { order: -1; }
  .hero-media img { aspect-ratio: 16 / 9; object-fit: cover; object-position: center; }
  .hero-copy h1 { font-size: clamp(2rem, 8.8vw, 2.55rem); }
  .mobile-rfq {
    left: auto;
    right: 14px;
    bottom: calc(12px + env(safe-area-inset-bottom));
    min-height: 48px;
    width: auto;
    max-width: 148px;
    padding: 9px 16px;
    justify-content: center;
    border-radius: 999px;
  }
  .mobile-rfq span::before { content: "✉"; margin-right: 7px; font-size: .9em; }
  .mobile-rfq strong { display: none; }
  footer { padding-bottom: calc(72px + env(safe-area-inset-bottom)); }
}

@media (max-width: 540px) {
  .product-grid { grid-template-columns: 1fr; gap: 12px; }
  .product-card {
    display: grid;
    grid-template-columns: 42% 58%;
    min-height: 154px;
  }
  .product-card > img {
    width: 100%;
    height: 100%;
    min-height: 154px;
    aspect-ratio: auto;
    object-fit: contain;
    border-right: 1px solid var(--line);
    border-bottom: 0;
  }
  .product-body { display: flex; flex-direction: column; justify-content: center; padding: 14px 13px; }
  .product-body h3 { font-size: .96rem; }
  .product-body p { -webkit-line-clamp: 4; font-size: .76rem; }

  .recognition-grid { grid-template-columns: 1fr; gap: 12px; }
  .recognition-card {
    display: grid;
    grid-template-columns: 42% 58%;
    min-height: 145px;
  }
  .recognition-card img {
    width: 100%;
    height: 100%;
    min-height: 145px;
    aspect-ratio: auto;
    object-fit: contain;
    border-right: 1px solid #e0d8ce;
    border-bottom: 0;
  }
  .recognition-card div { display: flex; flex-direction: column; justify-content: center; padding: 14px; }
  .recognition-card h3 { font-size: .88rem; }
  .recognition-card p { font-size: .74rem; }
}

@media (max-width: 380px) {
  .container { width: min(calc(100% - 22px), var(--max)); }
  .brand-word { font-size: 1.3rem; }
  .product-card, .recognition-card { grid-template-columns: 40% 60%; }
}

/* Full hero image display fix — build 20260801-1035 */
.hero-media {
  align-self: center;
  overflow: hidden;
}
.hero-media picture {
  display: block;
  width: 100%;
}
.hero-media img {
  display: block;
  width: 100%;
  height: auto;
  max-height: none;
  aspect-ratio: auto;
  object-fit: contain;
  object-position: center;
  background: #eef2f4;
}
@media (max-width: 720px) {
  .hero-media img {
    width: 100%;
    height: auto;
    aspect-ratio: auto;
    object-fit: contain;
  }
}