:root {
  --ink: #162133;
  --muted: #627085;
  --line: #d8e0ea;
  --brand: #0f5fa8;
  --brand-dark: #0b4173;
  --accent: #d8372a;
  --bg: #f5f8fb;
  --panel: #ffffff;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  color: var(--ink);
  font-family: Arial, "Microsoft YaHei", "PingFang SC", sans-serif;
  line-height: 1.7;
  background: var(--bg);
}

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

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

.site-header {
  position: sticky;
  top: 0;
  z-index: 10;
  padding: 12px clamp(18px, 4vw, 64px) 0;
  background: rgba(255, 255, 255, 0.96);
  border-bottom: 1px solid var(--line);
}

.header-main {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 32px;
}

.brand {
  display: flex;
  flex: 1 1 620px;
  align-items: center;
  min-width: min(620px, 100%);
}

.brand-logo {
  width: clamp(560px, 48vw, 780px);
  height: auto;
}

.header-contact {
  display: flex;
  align-items: center;
  justify-content: flex-end;
  gap: clamp(18px, 2.6vw, 34px);
  margin-left: auto;
  white-space: nowrap;
}

.header-contact div {
  position: relative;
  padding-left: 22px;
}

.header-contact div::before {
  position: absolute;
  top: 50%;
  left: 0;
  width: 14px;
  height: 14px;
  content: "";
  background:
    linear-gradient(135deg, transparent 42%, var(--ink) 43% 57%, transparent 58%),
    radial-gradient(circle at 70% 30%, var(--ink) 0 4px, transparent 4px);
  border-radius: 3px;
  transform: translateY(-50%) rotate(-18deg);
  opacity: .9;
}

.header-contact span {
  display: block;
  color: #1e293b;
  font-size: 14px;
  font-weight: 800;
  line-height: 1.2;
}

.header-contact a {
  display: block;
  margin-top: 3px;
  color: #f26a21;
  font-family: Arial, sans-serif;
  font-size: clamp(20px, 1.65vw, 25px);
  font-weight: 900;
  line-height: 1;
  letter-spacing: .5px;
}

.nav,
.site-nav {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  justify-content: flex-start;
  gap: 4px;
  margin-top: 10px;
  margin-right: calc(clamp(18px, 4vw, 64px) * -1);
  margin-left: calc(clamp(18px, 4vw, 64px) * -1);
  padding: 0 clamp(18px, 4vw, 64px);
  color: white;
  font-size: 16px;
  font-weight: 700;
  background: linear-gradient(90deg, var(--brand-dark), var(--brand));
  border-top: 1px solid #0b4f8b;
  box-shadow: 0 8px 18px rgba(15, 65, 115, .16);
}

.nav a,
.site-nav a {
  display: inline-flex;
  min-height: 46px;
  align-items: center;
  padding: 0 18px;
  border-right: 1px solid rgba(255, 255, 255, .14);
}

.nav a:hover,
.nav a:focus,
.site-nav a:hover,
.site-nav a:focus {
  color: white;
  background: rgba(255, 255, 255, .14);
}

.footer-links a:hover {
  color: var(--brand);
}

.hero {
  position: relative;
  min-height: 620px;
  overflow: hidden;
  background: #172235;
}

.hero::after {
  position: absolute;
  inset: 0;
  content: "";
  background: linear-gradient(90deg, rgba(9, 22, 38, 0.2) 0%, rgba(9, 22, 38, 0.58) 42%, rgba(9, 22, 38, 0.94) 100%);
}

.hero img {
  width: 100%;
  height: 620px;
  object-fit: cover;
}

.hero-content {
  position: absolute;
  z-index: 1;
  top: 50%;
  right: clamp(20px, 6vw, 88px);
  left: auto;
  max-width: 680px;
  transform: translateY(-50%);
  color: white;
  text-align: right;
}

.eyebrow {
  margin: 0 0 10px;
  color: var(--accent);
  font-size: 14px;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.hero-content .eyebrow {
  color: #ffcf70;
}

h1,
h2,
h3,
p {
  margin-top: 0;
}

h1 {
  margin-bottom: 22px;
  font-size: clamp(34px, 5vw, 58px);
  line-height: 1.18;
}

h2 {
  margin-bottom: 14px;
  font-size: clamp(26px, 3vw, 38px);
  line-height: 1.25;
}

h3 {
  margin-bottom: 10px;
  font-size: 22px;
}

.hero-content p:not(.eyebrow) {
  color: #e7edf5;
  font-size: 18px;
}

.english-hero::after {
  background: linear-gradient(90deg, rgba(9, 22, 38, 0.18) 0%, rgba(9, 22, 38, 0.56) 42%, rgba(9, 22, 38, 0.94) 100%);
}

.english-hero .hero-content {
  right: clamp(20px, 6vw, 88px);
  left: auto;
  max-width: 720px;
  text-align: right;
}

.hero .hero-actions,
.english-hero .hero-actions {
  justify-content: flex-end;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  margin-top: 28px;
}

.btn {
  display: inline-flex;
  min-height: 46px;
  align-items: center;
  justify-content: center;
  padding: 10px 22px;
  border: 1px solid rgba(255, 255, 255, 0.45);
  border-radius: 6px;
  font-weight: 700;
}

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

.btn.secondary {
  color: white;
}

.section {
  width: min(1180px, calc(100% - 36px));
  margin: 0 auto;
  padding: 72px 0;
}

.section.image-strip {
  padding: 28px 0 34px;
}

.intro {
  display: grid;
  grid-template-columns: minmax(280px, 0.72fr) minmax(0, 1fr);
  gap: clamp(28px, 5vw, 72px);
  align-items: center;
  border-bottom: 1px solid var(--line);
}

.intro h2 {
  max-width: 560px;
  margin-bottom: 0;
  font-size: clamp(32px, 4vw, 52px);
  line-height: 1.14;
}

.intro h2 span {
  display: block;
}

.intro-points {
  display: grid;
  gap: 14px;
}

.intro-points p {
  display: grid;
  grid-template-columns: minmax(150px, .42fr) minmax(0, 1fr);
  gap: 18px;
  align-items: center;
  margin: 0;
  padding: 18px 20px;
  background: white;
  border: 1px solid var(--line);
  border-left: 4px solid var(--accent);
  border-radius: 8px;
  box-shadow: 0 12px 28px rgba(15, 65, 115, .06);
}

.intro-points strong {
  color: var(--ink);
  font-size: 18px;
  line-height: 1.35;
}

.intro-points span {
  color: var(--muted);
  font-size: 16px;
  line-height: 1.65;
}

.intro p:last-child,
.seo-copy p,
.feature-grid p,
.product-card p {
  color: var(--muted);
}

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

.product-card {
  display: flex;
  min-height: 260px;
  flex-direction: column;
  padding: 24px;
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: 8px;
}

.product-thumb {
  width: 100%;
  aspect-ratio: 4 / 3;
  margin-bottom: 18px;
  object-fit: cover;
  border-radius: 6px;
  border: 1px solid var(--line);
  transition: transform 0.18s ease, box-shadow 0.18s ease;
}

.product-image-link {
  display: block;
}

.product-image-link:hover .product-thumb,
.product-image-link:focus .product-thumb {
  transform: translateY(-2px);
  box-shadow: 0 12px 24px rgba(15, 65, 115, 0.16);
}

.product-title-link {
  color: inherit;
}

.product-title-link:hover,
.product-title-link:focus {
  color: var(--brand);
}

.product-detail-link {
  margin-top: auto;
  color: var(--brand);
  font-weight: 700;
}

.advantages {
  width: 100%;
  padding-right: max(18px, calc((100% - 1180px) / 2));
  padding-left: max(18px, calc((100% - 1180px) / 2));
  background: #eaf1f8;
}

.section-heading {
  max-width: 720px;
}

.feature-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 18px;
  margin-top: 28px;
}

.feature-grid > div {
  padding: 26px;
  background: white;
  border-left: 4px solid var(--brand);
  border-radius: 8px;
}

.feature-grid strong {
  display: block;
  margin-bottom: 10px;
  font-size: 20px;
}

.seo-copy {
  max-width: 980px;
}

.page-hero {
  padding: 70px max(18px, calc((100% - 1180px) / 2));
  color: white;
  background: linear-gradient(135deg, #153454, #0b5b9a);
}

.page-hero p {
  max-width: 760px;
  color: #d9e8f7;
}

.category-photo-hero {
  position: relative;
  min-height: 380px;
  overflow: hidden;
  background-color: #123150;
  background-position: center;
  background-size: cover;
}

.category-photo-hero::before {
  position: absolute;
  inset: 0;
  content: "";
  background: linear-gradient(90deg, rgba(7, 22, 38, .88), rgba(7, 22, 38, .52) 46%, rgba(7, 22, 38, .12));
}

.category-photo-hero > * {
  position: relative;
  z-index: 1;
}

.category-photo-hero h1 {
  color: white;
}

.flame-arrester-category-hero {
  background-image: url("category-banners/flame-arrester-banner.webp");
}

.product-landing-hero {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(340px, .9fr);
  gap: 34px;
  align-items: center;
  padding: clamp(40px, 6vw, 78px) max(18px, calc((100% - 1180px) / 2));
  color: white;
  background:
    radial-gradient(circle at 82% 12%, rgba(242, 106, 33, .24), transparent 30%),
    linear-gradient(135deg, #092e52, #0b67a8);
}

.product-landing-hero h1 {
  margin: 12px 0 14px;
  color: white;
  font-size: clamp(34px, 4.8vw, 64px);
  line-height: 1.08;
}

.hero-lead {
  max-width: 760px;
  color: rgba(255, 255, 255, .84);
  font-size: 18px;
}

.note-text {
  max-width: 760px;
  margin: 18px 0 0;
  color: rgba(255, 255, 255, .78);
  font-size: 15px;
  font-weight: 700;
}

.commerce-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 24px;
}

.commerce-actions a {
  display: inline-flex;
  min-height: 46px;
  align-items: center;
  padding: 0 18px;
  font-weight: 800;
  border-radius: 6px;
}

.commerce-actions .primary {
  color: white;
  background: #f26a21;
}

.commerce-actions .secondary {
  color: #123150;
  background: white;
  border: 1px solid #d8e7f5;
}

.landing-visual {
  display: grid;
  gap: 12px;
}

.landing-visual img {
  width: 100%;
  background: white;
  border-radius: 10px;
  box-shadow: 0 22px 60px rgba(0, 0, 0, .22);
}

.product-landing-hero .landing-visual > img {
  max-height: 380px;
  object-fit: contain;
}

.landing-thumbs {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 10px;
}

.landing-thumbs img {
  aspect-ratio: 1 / 1;
  object-fit: cover;
  box-shadow: none;
}

.content-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 320px;
  gap: 34px;
}

.content-block {
  padding: 30px;
  background: white;
  border: 1px solid var(--line);
  border-radius: 8px;
}

.content-block + .content-block {
  margin-top: 18px;
}

.whatsapp-qr-card {
  display: grid;
  gap: 14px;
  align-content: start;
}

.whatsapp-qr-card img {
  width: min(100%, 360px);
  border: 1px solid #d9e8f7;
  border-radius: 14px;
  background: white;
  box-shadow: 0 16px 42px rgba(8, 42, 85, .12);
}

.whatsapp-qr-card strong {
  color: var(--brand);
  font-size: 20px;
}

.whatsapp-note {
  margin: 0;
  color: #5c6d82;
}

.product-detail-image {
  width: 100%;
  max-height: 620px;
  object-fit: cover;
  border-radius: 6px;
}

.subcategory-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 16px;
}

.subcategory-card {
  display: flex;
  flex-direction: column;
  padding: 20px;
  background: #f8fbff;
  border: 1px solid #d9e8f7;
  border-left: 4px solid var(--brand);
  border-radius: 8px;
}

.subcategory-card span {
  display: inline-flex;
  margin-bottom: 8px;
  color: #f26a21;
  font-family: Arial, sans-serif;
  font-size: 13px;
  font-weight: 900;
  letter-spacing: .8px;
}

.subcategory-card h3 {
  margin-bottom: 10px;
}

.subcategory-title-link {
  color: inherit;
}

.subcategory-title-link:hover,
.subcategory-title-link:focus {
  color: var(--brand);
}

.subcategory-link {
  display: inline-flex;
  min-height: 38px;
  align-items: center;
  margin-top: 14px;
  padding: 0 14px;
  color: white;
  font-weight: 800;
  background: var(--brand);
  border-radius: 6px;
}

.subcategory-link:hover,
.subcategory-link:focus {
  color: white;
  background: var(--brand-dark);
}

.subcategory-card p,
.subcategory-card li,
.model-code-grid li {
  color: var(--muted);
}

.subcategory-card > p {
  min-height: 6.8em;
}

.subcategory-media {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 10px;
  margin: auto 0 0;
}

.subcategory-media.single {
  grid-template-columns: 1fr;
}

.subcategory-media figure {
  margin: 0;
}

.subcategory-media img {
  width: 100%;
  aspect-ratio: 1 / 1;
  object-fit: contain;
  background: white;
  border: 1px solid var(--line);
  border-radius: 6px;
}

.subcategory-image-link {
  display: block;
}

.subcategory-image-link img {
  transition: transform .18s ease, box-shadow .18s ease;
}

.subcategory-image-link:hover img,
.subcategory-image-link:focus img {
  box-shadow: 0 10px 24px rgba(15, 65, 115, .18);
  transform: translateY(-2px);
}

.subcategory-media figcaption {
  margin-top: 6px;
  color: #526173;
  font-size: 13px;
  font-weight: 700;
  text-align: center;
}

.section > .subcategory-media {
  max-width: 920px;
  margin-right: auto;
  margin-left: auto;
  gap: 12px;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
}

.section > .subcategory-media img {
  aspect-ratio: 4 / 3;
  max-height: 220px;
}

.subcategory-card ul,
.model-code-grid ul {
  margin: 12px 0 0;
  padding-left: 18px;
}

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

.model-code-grid > div {
  padding: 18px;
  background: #f7fafc;
  border: 1px solid var(--line);
  border-radius: 8px;
}

.advantage-grid,
.principle-list {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 16px;
}

.advantage-grid > div,
.principle-list > div {
  padding: 20px;
  background: #f7fafc;
  border: 1px solid var(--line);
  border-left: 4px solid var(--brand);
  border-radius: 8px;
}

.advantage-grid strong,
.principle-list strong {
  display: block;
  margin-bottom: 8px;
  color: #123150;
  font-size: 18px;
}

.structure-layout.compact {
  display: grid;
  grid-template-columns: minmax(0, .76fr) minmax(0, 1fr);
  gap: 22px;
  align-items: center;
}

.structure-layout.compact img {
  width: 100%;
  background: white;
  border: 1px solid var(--line);
  border-radius: 8px;
}

.code-box {
  display: inline-flex;
  padding: 16px 20px;
  margin: 10px 0 18px;
  color: white;
  font-family: Arial, sans-serif;
  font-size: 24px;
  font-weight: 900;
  letter-spacing: 2px;
  background: linear-gradient(135deg, var(--brand-dark), var(--brand));
  border-radius: 8px;
}

.detail-table {
  width: 100%;
  border-collapse: collapse;
  background: white;
  font-size: 15px;
}

.detail-table th,
.detail-table td {
  padding: 12px;
  text-align: left;
  vertical-align: top;
  border: 1px solid #dce7f1;
}

.detail-table th {
  color: white;
  background: #0b5b9a;
}

.note-box {
  padding: 16px;
  margin-top: 16px;
  color: #526173;
  background: #fff7ed;
  border-left: 4px solid #f26a21;
  border-radius: 8px;
}

.detail-cta {
  color: white;
  background: linear-gradient(135deg, #123150, #0b5b9a);
}

.detail-cta h2,
.detail-cta p {
  color: white;
}

.cta-panel {
  color: white;
  background: linear-gradient(135deg, #123150, #0b5b9a);
  border-radius: 8px;
}

.cta-panel h2,
.cta-panel p {
  color: white;
}

.cta-panel .button {
  display: inline-flex;
  min-height: 46px;
  align-items: center;
  margin-top: 10px;
  padding: 0 18px;
  color: white;
  font-weight: 800;
  background: #f26a21;
  border-radius: 6px;
}

.catalog-gallery {
  display: grid;
  gap: 18px;
  margin-top: 18px;
}

.catalog-gallery figure {
  margin: 0;
}

.catalog-gallery img {
  width: 100%;
  border: 1px solid var(--line);
  border-radius: 8px;
}

.catalog-gallery figcaption {
  margin-top: 8px;
  color: var(--muted);
  font-size: 14px;
}

.image-gallery {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 16px;
}

.image-gallery figure {
  margin: 0;
}

.image-gallery img {
  width: 100%;
  aspect-ratio: 4 / 3;
  object-fit: cover;
  border: 1px solid var(--line);
  border-radius: 6px;
}

.image-gallery figcaption {
  margin-top: 8px;
  color: var(--muted);
  font-size: 14px;
}

.factory-gallery {
  margin-top: 28px;
}

.qualification-section {
  width: 100%;
  padding-right: max(18px, calc((100% - 1180px) / 2));
  padding-left: max(18px, calc((100% - 1180px) / 2));
  background: linear-gradient(180deg, #fff, #f4f8fb);
}

.certificate-grid {
  display: grid;
  grid-template-columns: repeat(5, minmax(0, 1fr));
  gap: 16px;
  margin-top: 28px;
}

.certificate-grid figure {
  margin: 0;
  padding: 12px;
  background: white;
  border: 1px solid var(--line);
  border-radius: 8px;
  box-shadow: 0 10px 24px rgba(15, 65, 115, 0.08);
}

.certificate-grid a {
  display: block;
}

.certificate-grid img {
  width: 100%;
  aspect-ratio: 3 / 4;
  object-fit: cover;
  object-position: top center;
  background: #f7fafc;
  border: 1px solid #edf2f7;
  border-radius: 6px;
  transition: transform 0.18s ease, box-shadow 0.18s ease;
}

.certificate-grid a:hover img,
.certificate-grid a:focus img {
  transform: translateY(-2px);
  box-shadow: 0 12px 26px rgba(15, 65, 115, 0.18);
}

.certificate-grid figcaption {
  margin-top: 10px;
  color: #526173;
  font-size: 14px;
  font-weight: 700;
  text-align: center;
}

.factory-preview {
  display: grid;
  grid-template-columns: minmax(0, 0.8fr) minmax(0, 1.2fr);
  gap: 34px;
  align-items: center;
}

.factory-preview img {
  width: 100%;
  aspect-ratio: 16 / 9;
  object-fit: cover;
  border: 1px solid var(--line);
  border-radius: 8px;
}

.text-link {
  color: var(--brand);
  font-weight: 700;
}

.spec-list {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 10px;
  padding: 0;
  list-style: none;
}

.spec-list li,
.side-box li {
  padding: 10px 0;
  border-bottom: 1px solid var(--line);
}

.side-box {
  position: sticky;
  top: 92px;
  padding: 24px;
  background: white;
  border: 1px solid var(--line);
  border-radius: 8px;
}

.side-box ul {
  padding-left: 18px;
}

.category-side-nav {
  display: grid;
  gap: 8px;
  padding: 0;
  list-style: none;
}

.category-side-nav li {
  padding: 0;
  border-bottom: 0;
}

.category-side-nav a {
  display: block;
  padding: 10px 12px;
  color: var(--muted);
  font-size: 15px;
  font-weight: 800;
  line-height: 1.35;
  background: #f5f8fb;
  border: 1px solid var(--line);
  border-radius: 6px;
}

.category-side-nav a:hover,
.category-side-nav a:focus,
.category-side-nav a[aria-current="page"] {
  color: var(--brand);
  background: #eaf4ff;
  border-color: #b8d6ef;
}

.side-contact {
  margin-top: 18px;
  padding-top: 16px;
  border-top: 1px solid var(--line);
}

.side-contact p {
  margin-bottom: 8px;
  color: var(--muted);
  font-size: 14px;
}

.side-contact strong {
  display: block;
  color: var(--ink);
  font-size: 18px;
  line-height: 1.25;
}

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

.contact-card {
  padding: 24px;
  background: white;
  border: 1px solid var(--line);
  border-radius: 8px;
}

.contact-card h2 {
  margin-bottom: 8px;
  font-size: 20px;
}

.contact-card p {
  margin-bottom: 0;
  color: var(--muted);
  font-size: 18px;
  word-break: break-word;
}

.contact-card a {
  color: var(--brand);
  font-weight: 700;
}

.contact-note {
  padding-top: 24px;
}

.site-footer {
  display: flex;
  justify-content: space-between;
  gap: 24px;
  padding: 34px clamp(18px, 4vw, 64px);
  color: #dce7f2;
  background: #111d2b;
}

.site-footer p {
  margin-bottom: 0;
  color: #aebdcd;
}

.site-footer .icp-link {
  align-self: center;
  font-size: 14px;
}

.site-footer .icp-link a {
  color: #aebdcd;
}

.site-footer .icp-link a:hover,
.site-footer .icp-link a:focus {
  color: white;
}

.footer-links {
  display: flex;
  gap: 18px;
  white-space: nowrap;
}

@media (max-width: 940px) {
  .site-header,
  .site-footer,
  .intro {
    display: block;
  }

  .intro-points {
    margin-top: 26px;
  }

  .intro-points p {
    grid-template-columns: 1fr;
    gap: 6px;
  }

  .site-header {
    padding-bottom: 0;
  }

  .header-main {
    display: block;
  }

  .header-contact {
    justify-content: flex-end;
    gap: 18px;
    margin-top: 12px;
    white-space: normal;
  }

  .nav,
  .site-nav {
    justify-content: flex-start;
    gap: 0;
  }

  .hero,
  .hero img {
    min-height: 640px;
    height: 640px;
  }

  .product-grid,
  .feature-grid,
  .subcategory-grid,
  .model-code-grid,
  .subcategory-media,
  .product-landing-hero,
  .advantage-grid,
  .principle-list,
  .structure-layout.compact,
  .content-layout,
  .contact-grid,
  .factory-preview {
    grid-template-columns: 1fr;
  }

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

  .side-box {
    position: static;
  }

  .footer-links {
    margin-top: 18px;
  }
}

@media (max-width: 560px) {
  .brand {
    min-width: 0;
  }

  .brand-logo {
    width: min(100%, 680px);
  }

  .header-contact {
    display: grid;
    grid-template-columns: 1fr;
  }

  .header-contact a {
    font-size: 22px;
  }

  .hero-content {
    left: 18px;
    right: 18px;
    text-align: left;
  }

  .english-hero .hero-content {
    left: 18px;
    right: 18px;
    text-align: left;
  }

  .hero .hero-actions,
  .english-hero .hero-actions {
    justify-content: flex-start;
  }

  .hero::after {
    background: rgba(9, 22, 38, 0.78);
  }

  .section {
    padding: 48px 0;
  }

  .spec-list {
    grid-template-columns: 1fr;
  }

  .image-gallery {
    grid-template-columns: 1fr;
  }

  .certificate-grid {
    grid-template-columns: 1fr;
  }
}