/* ===== DILE SILICONE - 全站公共样式 ===== */
@import url('https://fonts.googleapis.com/css2?family=DM+Sans:wght@400;500;600;700;800&family=Noto+Sans+SC:wght@400;500;700&display=swap');

:root {
  --navy: #1a2744;
  --navy-light: #243358;
  --navy-dark: #111b30;
  --copper: #c8882a;
  --copper-light: #d9a04a;
  --steel: #7a8499;
  --white: #ffffff;
  --bg: #fafbfc;
  --border: #e5e8ef;
  --muted: #6b7280;
  --font: 'DM Sans', 'Noto Sans SC', system-ui, sans-serif;
  --radius: 0.5rem;
}

*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

html { scroll-behavior: smooth; }

body {
  font-family: var(--font);
  background: var(--bg);
  color: #1a1f2e;
  line-height: 1.6;
  overflow-x: hidden;
  -webkit-text-size-adjust: 100%;
}

a { text-decoration: none; color: inherit; }
img { max-width: 100%; display: block; }
button { cursor: pointer; border: none; background: none; font-family: inherit; }

/* ===== LAYOUT ===== */
.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 1.5rem;
}

/* ===== NAVBAR ===== */
.navbar {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 100;
  transition: background 0.3s, box-shadow 0.3s;
  background: transparent;
}
.navbar.scrolled {
  background: rgba(26,39,68,0.97);
  box-shadow: 0 2px 20px rgba(0,0,0,0.3);
  backdrop-filter: blur(12px);
}
.navbar-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 64px;
  padding: 0 1.5rem;
  max-width: 1200px;
  margin: 0 auto;
}
.navbar-brand {
  font-size: 1.25rem;
  font-weight: 800;
  color: var(--white);
  letter-spacing: 0.05em;
}
.navbar-brand span { color: var(--copper); }
.navbar-nav {
  display: flex;
  align-items: center;
  gap: 2rem;
  list-style: none;
}
.navbar-nav a {
  color: rgba(255,255,255,0.75);
  font-size: 0.875rem;
  font-weight: 500;
  transition: color 0.2s;
}
.navbar-nav a:hover { color: var(--copper); }
.navbar-nav .active { color: var(--white); }
.navbar-contact {
  display: flex;
  align-items: center;
  gap: 1rem;
}
.navbar-contact a {
  color: rgba(255,255,255,0.6);
  font-size: 0.8rem;
  transition: color 0.2s;
}
.navbar-contact a:hover { color: var(--copper); }
.btn-nav {
  background: var(--copper);
  color: var(--white);
  padding: 0.45rem 1.2rem;
  border-radius: var(--radius);
  font-size: 0.8rem;
  font-weight: 600;
  transition: background 0.2s;
}
.btn-nav:hover { background: var(--copper-light); }

/* Mobile menu */
.menu-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  padding: 4px;
}
.menu-toggle span {
  display: block;
  width: 22px;
  height: 2px;
  background: var(--white);
  border-radius: 2px;
  transition: all 0.3s;
}
.mobile-nav {
  display: none;
  position: fixed;
  top: 64px; left: 0; right: 0;
  background: rgba(26,39,68,0.98);
  backdrop-filter: blur(12px);
  padding: 1rem 1.5rem 1.5rem;
  z-index: 99;
  border-top: 1px solid rgba(255,255,255,0.1);
}
.mobile-nav.open { display: block; }
.mobile-nav ul { list-style: none; }
.mobile-nav ul li { border-bottom: 1px solid rgba(255,255,255,0.07); }
.mobile-nav ul a {
  display: block;
  padding: 0.75rem 0;
  color: rgba(255,255,255,0.75);
  font-size: 0.9rem;
  font-weight: 500;
}
.mobile-nav ul a:hover { color: var(--copper); }

/* ===== HERO ===== */
.hero {
  position: relative;
  min-height: 100vh;
  display: flex;
  align-items: center;
  overflow: hidden;
  background: var(--navy-dark);
}
.hero-bg {
  position: absolute;
  inset: 0;
  background-size: cover;
  background-position: center;
  transition: opacity 0.8s ease;
}
.hero-overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, rgba(17,27,48,0.85) 0%, rgba(26,39,68,0.6) 60%, rgba(17,27,48,0.4) 100%);
}
.hero-content {
  position: relative;
  z-index: 10;
  padding: 6rem 1.5rem 4rem;
  max-width: 1200px;
  margin: 0 auto;
  width: 100%;
}
.hero-tag {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  margin-bottom: 1.5rem;
}
.hero-tag-line {
  width: 3rem;
  height: 2px;
  background: var(--copper);
}
.hero-tag-text {
  color: var(--copper);
  font-size: 0.8rem;
  font-weight: 600;
  letter-spacing: 0.1em;
  text-transform: uppercase;
}
.hero h1 {
  font-size: clamp(2rem, 5vw, 3.75rem);
  font-weight: 800;
  color: var(--white);
  line-height: 1.1;
  margin-bottom: 1.25rem;
  max-width: 36rem;
}
.hero h1 em {
  font-style: normal;
  color: var(--copper-light);
}
.hero-sub {
  color: rgba(255,255,255,0.6);
  font-size: clamp(0.9rem, 2vw, 1.1rem);
  line-height: 1.7;
  max-width: 32rem;
  margin-bottom: 2.5rem;
}
.hero-btns {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
  margin-bottom: 3.5rem;
}
.btn-primary {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  background: var(--copper);
  color: var(--white);
  padding: 0.8rem 2rem;
  border-radius: var(--radius);
  font-weight: 600;
  font-size: 0.9rem;
  transition: background 0.2s;
}
.btn-primary:hover { background: var(--copper-light); }
.btn-outline {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  border: 1px solid rgba(255,255,255,0.25);
  color: var(--white);
  padding: 0.8rem 2rem;
  border-radius: var(--radius);
  font-weight: 600;
  font-size: 0.9rem;
  transition: background 0.2s;
}
.btn-outline:hover { background: rgba(255,255,255,0.1); }
.hero-stats {
  display: flex;
  gap: 2.5rem;
}
.hero-stat-val {
  font-size: 1.5rem;
  font-weight: 800;
  color: var(--copper-light);
}
.hero-stat-label {
  color: rgba(255,255,255,0.4);
  font-size: 0.7rem;
  margin-top: 0.2rem;
}
/* Slide dots */
.hero-dots {
  position: absolute;
  bottom: 5rem;
  left: 50%;
  transform: translateX(-50%);
  z-index: 20;
  display: flex;
  gap: 0.5rem;
}
.hero-dot {
  height: 10px;
  border-radius: 5px;
  background: rgba(255,255,255,0.4);
  transition: all 0.3s;
  cursor: pointer;
  width: 10px;
}
.hero-dot.active {
  width: 2rem;
  background: var(--copper);
}
.hero-arrows {
  position: absolute;
  top: 50%;
  transform: translateY(-50%);
  z-index: 20;
  display: flex;
  justify-content: space-between;
  width: 100%;
  padding: 0 1rem;
  pointer-events: none;
}
.hero-arrow {
  pointer-events: all;
  width: 2.5rem;
  height: 2.5rem;
  border-radius: 50%;
  background: rgba(0,0,0,0.3);
  color: var(--white);
  display: flex;
  align-items: center;
  justify-content: center;
  transition: background 0.2s;
  font-size: 1.2rem;
}
.hero-arrow:hover { background: rgba(200,136,42,0.7); }

/* ===== SECTION COMMON ===== */
.section { padding: 5rem 0; }
.section-light { background: var(--white); }
.section-dark { background: var(--navy); }
.section-gray { background: #f4f6fa; }
.section-tag {
  display: inline-block;
  color: var(--copper);
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  margin-bottom: 0.5rem;
}
.section-num {
  font-size: 4rem;
  font-weight: 800;
  color: rgba(26,39,68,0.06);
  line-height: 1;
  margin-bottom: -1rem;
  display: block;
}
.section-num-dark {
  color: rgba(255,255,255,0.06);
}
.section-title {
  font-size: clamp(1.5rem, 3vw, 2.25rem);
  font-weight: 800;
  color: var(--navy);
  line-height: 1.2;
  margin-bottom: 1rem;
}
.section-title-white { color: var(--white); }
.section-desc {
  color: var(--muted);
  font-size: 0.95rem;
  line-height: 1.7;
  max-width: 40rem;
}
.section-desc-white { color: rgba(255,255,255,0.5); }

/* ===== ABOUT ===== */
.about-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 4rem;
  align-items: center;
}
.about-img {
  border-radius: 0.75rem;
  overflow: hidden;
  position: relative;
}
.about-img img {
  width: 100%;
  height: 380px;
  object-fit: cover;
}
.about-features {
  display: flex;
  flex-direction: column;
  gap: 1rem;
  margin: 2rem 0;
}
.about-feature {
  display: flex;
  align-items: flex-start;
  gap: 0.75rem;
  padding: 1rem;
  background: #f4f6fa;
  border-radius: var(--radius);
  border-left: 3px solid var(--copper);
}
.about-feature-icon {
  width: 2rem;
  height: 2rem;
  background: var(--copper);
  border-radius: 0.375rem;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--white);
  flex-shrink: 0;
  font-size: 0.9rem;
}
.about-feature-title {
  font-weight: 700;
  color: var(--navy);
  font-size: 0.9rem;
  margin-bottom: 0.2rem;
}
.about-feature-desc {
  color: var(--muted);
  font-size: 0.8rem;
}
.about-caps {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 0.75rem;
  margin-top: 1.5rem;
}
.about-cap {
  background: var(--navy);
  color: var(--white);
  border-radius: var(--radius);
  padding: 1rem;
  text-align: center;
}
.about-cap-val {
  font-size: 1.5rem;
  font-weight: 800;
  color: var(--copper-light);
}
.about-cap-unit { font-size: 0.7rem; color: rgba(255,255,255,0.5); }
.about-cap-label { font-size: 0.7rem; color: rgba(255,255,255,0.6); margin-top: 0.25rem; }

/* ===== PRODUCTS ===== */
.products-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.5rem;
}
.product-card {
  background: var(--white);
  border: 1px solid var(--border);
  border-radius: 0.75rem;
  overflow: hidden;
  transition: box-shadow 0.3s, border-color 0.3s, transform 0.2s;
  cursor: pointer;
}
.product-card:hover {
  box-shadow: 0 8px 30px rgba(26,39,68,0.12);
  border-color: rgba(26,39,68,0.2);
  transform: translateY(-2px);
}
.product-card-img {
  position: relative;
  height: 220px;
  overflow: hidden;
}
.product-card-img img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.5s;
}
.product-card:hover .product-card-img img { transform: scale(1.05); }
.product-card-img-overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(to top, rgba(17,27,48,0.4), transparent);
}
.product-card-certs {
  position: absolute;
  bottom: 0.75rem;
  left: 0.75rem;
  display: flex;
  gap: 0.35rem;
  flex-wrap: wrap;
}
.cert-badge {
  padding: 0.2rem 0.5rem;
  background: rgba(26,39,68,0.7);
  backdrop-filter: blur(4px);
  border-radius: 0.25rem;
  color: var(--white);
  font-size: 0.65rem;
  font-weight: 500;
}
.product-card-body {
  padding: 1.25rem;
}
.product-card-name {
  font-size: 1.05rem;
  font-weight: 700;
  color: var(--navy);
  margin-bottom: 0.25rem;
  transition: color 0.2s;
}
.product-card:hover .product-card-name { color: var(--copper); }
.product-card-tagline {
  color: var(--copper);
  font-size: 0.75rem;
  font-weight: 500;
  margin-bottom: 0.75rem;
}
.product-card-desc {
  color: var(--muted);
  font-size: 0.85rem;
  line-height: 1.6;
  margin-bottom: 1rem;
  display: -webkit-box;
  -webkit-line-clamp: 3;
  -webkit-box-orient: vertical;
  overflow: hidden;
}
.product-card-link {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  color: var(--navy);
  font-weight: 600;
  font-size: 0.85rem;
  transition: color 0.2s;
}
.product-card:hover .product-card-link { color: var(--copper); }

/* ===== CERTIFICATIONS ===== */
.certs-grid {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: 1rem;
  margin-top: 3rem;
}
.cert-card {
  background: rgba(255,255,255,0.05);
  border: 1px solid rgba(255,255,255,0.1);
  border-radius: 0.75rem;
  padding: 1.5rem 1rem;
  text-align: center;
  transition: background 0.3s, border-color 0.3s;
}
.cert-card:hover {
  background: rgba(255,255,255,0.1);
  border-color: rgba(200,136,42,0.4);
}
.cert-card-name {
  font-size: 1rem;
  font-weight: 700;
  color: var(--copper-light);
  margin-bottom: 0.5rem;
}
.cert-card-desc {
  color: rgba(255,255,255,0.5);
  font-size: 0.75rem;
  line-height: 1.5;
}

/* ===== INDUSTRIES ===== */
.industries-layout {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 4rem;
  align-items: start;
  margin-bottom: 3rem;
}
.industries-img {
  border-radius: 0.75rem;
  overflow: hidden;
}
.industries-img img {
  width: 100%;
  height: 280px;
  object-fit: cover;
}
.industries-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 0.75rem;
}
.industry-card {
  background: rgba(255,255,255,0.05);
  border: 1px solid rgba(255,255,255,0.1);
  border-radius: 0.75rem;
  padding: 1.25rem 1rem;
  transition: background 0.3s, border-color 0.3s;
}
.industry-card:hover {
  background: rgba(255,255,255,0.1);
  border-color: rgba(200,136,42,0.3);
}
.industry-icon {
  width: 2.5rem;
  height: 2.5rem;
  background: rgba(200,136,42,0.1);
  border-radius: 0.375rem;
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 0.75rem;
  font-size: 1.1rem;
}
.industry-name {
  font-weight: 700;
  color: var(--white);
  font-size: 0.85rem;
  margin-bottom: 0.3rem;
}
.industry-desc {
  color: rgba(255,255,255,0.4);
  font-size: 0.75rem;
  line-height: 1.5;
}

/* ===== CONTACT ===== */
.contact-grid {
  display: grid;
  grid-template-columns: 2fr 3fr;
  gap: 4rem;
}
.contact-info-item {
  display: flex;
  align-items: flex-start;
  gap: 0.75rem;
  padding: 0.75rem 0;
  border-bottom: 1px solid var(--border);
}
.contact-info-icon {
  width: 2rem;
  height: 2rem;
  background: rgba(200,136,42,0.1);
  border-radius: 0.375rem;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--copper);
  flex-shrink: 0;
  font-size: 0.9rem;
}
.contact-info-label {
  font-size: 0.7rem;
  color: var(--muted);
  margin-bottom: 0.15rem;
}
.contact-info-value {
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--navy);
}
.contact-form {
  background: var(--white);
  border: 1px solid var(--border);
  border-radius: 0.75rem;
  padding: 2rem;
}
.form-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1rem;
  margin-bottom: 1rem;
}
.form-group {
  display: flex;
  flex-direction: column;
  gap: 0.4rem;
  margin-bottom: 1rem;
}
.form-group label {
  font-size: 0.8rem;
  font-weight: 500;
  color: var(--navy);
}
.form-group input,
.form-group textarea {
  padding: 0.65rem 0.9rem;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  font-family: var(--font);
  font-size: 0.875rem;
  color: var(--navy);
  background: var(--bg);
  transition: border-color 0.2s;
  outline: none;
}
.form-group input:focus,
.form-group textarea:focus {
  border-color: var(--copper);
  background: var(--white);
}
.form-group textarea { resize: vertical; min-height: 120px; }
.btn-submit {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  background: var(--copper);
  color: var(--white);
  padding: 0.8rem 2rem;
  border-radius: var(--radius);
  font-weight: 600;
  font-size: 0.9rem;
  transition: background 0.2s;
  cursor: pointer;
  border: none;
  font-family: var(--font);
}
.btn-submit:hover { background: var(--copper-light); }

/* ===== FOOTER ===== */
.footer {
  background: var(--navy-dark);
  padding: 3rem 0 1.5rem;
}
.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 2fr;
  gap: 3rem;
  padding-bottom: 2rem;
  border-bottom: 1px solid rgba(255,255,255,0.08);
  margin-bottom: 1.5rem;
}
.footer-brand {
  font-size: 1.1rem;
  font-weight: 800;
  color: var(--white);
  margin-bottom: 0.75rem;
}
.footer-brand span { color: var(--copper); }
.footer-desc {
  color: rgba(255,255,255,0.35);
  font-size: 0.8rem;
  line-height: 1.7;
  margin-bottom: 1.25rem;
}
.footer-heading {
  color: var(--white);
  font-size: 0.8rem;
  font-weight: 600;
  margin-bottom: 1rem;
}
.footer-links { list-style: none; }
.footer-links li { margin-bottom: 0.6rem; }
.footer-links a {
  color: rgba(255,255,255,0.4);
  font-size: 0.8rem;
  transition: color 0.2s;
}
.footer-links a:hover { color: var(--copper); }
.footer-contact-item {
  display: flex;
  align-items: flex-start;
  gap: 0.6rem;
  margin-bottom: 0.75rem;
}
.footer-contact-icon { color: var(--copper); font-size: 0.85rem; flex-shrink: 0; margin-top: 0.1rem; }
.footer-contact-text {
  color: rgba(255,255,255,0.4);
  font-size: 0.8rem;
  line-height: 1.5;
}
.footer-bottom {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 1rem;
}
.footer-copy {
  color: rgba(255,255,255,0.3);
  font-size: 0.75rem;
}
.footer-certs {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  color: rgba(255,255,255,0.3);
  font-size: 0.75rem;
}
.footer-certs span { color: rgba(255,255,255,0.15); }

/* ===== PRODUCT DETAIL ===== */
.product-detail-hero {
  background: var(--navy);
  padding: 8rem 0 4rem;
}
.product-detail-breadcrumb {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  margin-bottom: 1.5rem;
  font-size: 0.8rem;
  color: rgba(255,255,255,0.4);
}
.product-detail-breadcrumb a { color: rgba(255,255,255,0.4); transition: color 0.2s; }
.product-detail-breadcrumb a:hover { color: var(--copper); }
.product-detail-breadcrumb .sep { color: rgba(255,255,255,0.2); }
.product-detail-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 4rem;
  align-items: start;
}
.product-detail-img {
  border-radius: 0.75rem;
  overflow: hidden;
}
.product-detail-img img {
  width: 100%;
  height: 400px;
  object-fit: cover;
}
.product-detail-certs {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin-bottom: 1.25rem;
}
.cert-tag {
  padding: 0.3rem 0.75rem;
  background: rgba(200,136,42,0.15);
  border: 1px solid rgba(200,136,42,0.3);
  border-radius: 2rem;
  color: var(--copper-light);
  font-size: 0.75rem;
  font-weight: 500;
}
.product-detail-name {
  font-size: clamp(1.75rem, 3vw, 2.5rem);
  font-weight: 800;
  color: var(--white);
  margin-bottom: 0.5rem;
}
.product-detail-tagline {
  color: var(--copper-light);
  font-size: 0.9rem;
  margin-bottom: 1.25rem;
}
.product-detail-desc {
  color: rgba(255,255,255,0.6);
  font-size: 0.9rem;
  line-height: 1.8;
  margin-bottom: 2rem;
}
.product-highlights {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 0.75rem;
  margin-bottom: 2rem;
}
.highlight-card {
  background: rgba(255,255,255,0.06);
  border: 1px solid rgba(255,255,255,0.1);
  border-radius: var(--radius);
  padding: 1rem;
  text-align: center;
}
.highlight-val {
  font-size: 1.1rem;
  font-weight: 800;
  color: var(--copper-light);
}
.highlight-label {
  color: rgba(255,255,255,0.5);
  font-size: 0.7rem;
  margin-top: 0.2rem;
}
.product-detail-btns {
  display: flex;
  gap: 1rem;
  flex-wrap: wrap;
}

/* Product detail body */
.product-body { padding: 4rem 0; background: var(--white); }
.product-body-grid {
  display: grid;
  grid-template-columns: 2fr 1fr;
  gap: 3rem;
}
.features-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}
.features-list li {
  display: flex;
  align-items: flex-start;
  gap: 0.6rem;
  font-size: 0.875rem;
  color: var(--navy);
  line-height: 1.5;
}
.features-list li::before {
  content: '✓';
  color: var(--copper);
  font-weight: 700;
  flex-shrink: 0;
  margin-top: 0.05rem;
}
.specs-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.85rem;
}
.specs-table tr { border-bottom: 1px solid var(--border); }
.specs-table tr:last-child { border-bottom: none; }
.specs-table td {
  padding: 0.65rem 0.75rem;
  vertical-align: top;
}
.specs-table td:first-child {
  color: var(--muted);
  width: 40%;
  font-weight: 500;
}
.specs-table td:last-child { color: var(--navy); font-weight: 600; }
.specs-box {
  background: #f4f6fa;
  border-radius: 0.75rem;
  padding: 1.5rem;
}
.specs-box-title {
  font-size: 0.9rem;
  font-weight: 700;
  color: var(--navy);
  margin-bottom: 1rem;
  padding-bottom: 0.75rem;
  border-bottom: 2px solid var(--copper);
}
.apps-grid {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin-top: 1rem;
}
.app-tag {
  padding: 0.35rem 0.85rem;
  background: rgba(26,39,68,0.07);
  border-radius: 2rem;
  color: var(--navy);
  font-size: 0.8rem;
  font-weight: 500;
}

/* ===== HEX PATTERN ===== */
.hex-bg {
  position: absolute;
  inset: 0;
  opacity: 0.3;
  background-image: url("data:image/svg+xml,%3Csvg width='60' height='52' viewBox='0 0 60 52' xmlns='http://www.w3.org/2000/svg'%3E%3Cpath d='M15 0 L45 0 L60 26 L45 52 L15 52 L0 26Z' fill='none' stroke='%231a2744' stroke-width='1'/%3E%3C/svg%3E");
  background-size: 60px 52px;
}

/* ===== RESPONSIVE ===== */
@media (max-width: 1024px) {
  .products-grid { grid-template-columns: repeat(2, 1fr); }
  .certs-grid { grid-template-columns: repeat(3, 1fr); }
  .industries-grid { grid-template-columns: repeat(4, 1fr); }
  .about-grid { grid-template-columns: 1fr; }
  .about-img { display: none; }
  .footer-grid { grid-template-columns: 1fr 1fr; }
  .product-detail-grid { grid-template-columns: 1fr; }
  .product-detail-img img { height: 280px; }
  .product-body-grid { grid-template-columns: 1fr; }
  .industries-layout { grid-template-columns: 1fr; }
}
@media (max-width: 768px) {
  .navbar-nav, .navbar-contact { display: none; }
  .menu-toggle { display: flex; }
  .products-grid { grid-template-columns: 1fr 1fr; gap: 0.75rem; }
  .product-card-img { height: 160px; }
  .certs-grid { grid-template-columns: repeat(2, 1fr); }
  .industries-grid { grid-template-columns: repeat(2, 1fr); }
  .contact-grid { grid-template-columns: 1fr; }
  .form-row { grid-template-columns: 1fr; }
  .footer-grid { grid-template-columns: 1fr; gap: 2rem; }
  .about-caps { grid-template-columns: repeat(2, 1fr); }
  .product-highlights { grid-template-columns: repeat(2, 1fr); }
  .hero-stats { gap: 1.5rem; }
  .section { padding: 3rem 0; }
}
@media (max-width: 480px) {
  .products-grid { grid-template-columns: 1fr; }
  .hero h1 { font-size: 1.75rem; }
}

/* ===== UTILITIES ===== */
.text-copper { color: var(--copper); }
.text-navy { color: var(--navy); }
.text-white { color: var(--white); }
.mt-2 { margin-top: 0.5rem; }
.mt-3 { margin-top: 0.75rem; }
.mt-4 { margin-top: 1rem; }
.mb-2 { margin-bottom: 0.5rem; }
.mb-4 { margin-bottom: 1rem; }
.mb-6 { margin-bottom: 1.5rem; }
.mb-8 { margin-bottom: 2rem; }
.mb-12 { margin-bottom: 3rem; }
.relative { position: relative; }
.overflow-hidden { overflow: hidden; }