:root {
  --color-primary: #173a5a;
  --color-primary-dark: #0d2941;
  --color-accent: #b35a2d;
  --color-text: #172536;
  --color-text-secondary: #526174;
  --color-border: #d9e0e6;
  --color-bg-light: #f4f6f8;
  --color-bg-warm: #f7f5f1;
  --color-white: #ffffff;
  --content-width: 1200px;
  --radius: 4px;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  color: var(--color-text);
  background: var(--color-white);
  font-family: "Microsoft YaHei", "PingFang SC", "Source Han Sans SC", "Noto Sans CJK SC", Arial, sans-serif;
  font-size: 16px;
  line-height: 1.75;
  -webkit-font-smoothing: antialiased;
}

body,
button,
input,
textarea,
select {
  font-family: inherit;
}

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

a {
  color: inherit;
}

button,
a {
  -webkit-tap-highlight-color: transparent;
}

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

h1,
h2,
h3 {
  color: var(--color-primary-dark);
}

h1 {
  margin-bottom: 20px;
  font-size: 42px;
  font-weight: 700;
  line-height: 1.2;
}

h2 {
  margin-bottom: 20px;
  font-size: 30px;
  font-weight: 700;
  line-height: 1.3;
}

h3 {
  margin-bottom: 12px;
  font-size: 20px;
  font-weight: 600;
  line-height: 1.4;
}

p {
  margin-bottom: 18px;
  color: var(--color-text-secondary);
}

.container {
  width: min(calc(100% - 48px), var(--content-width));
  margin-inline: auto;
}

.reading-width {
  max-width: 800px;
}

.visually-hidden {
  position: absolute !important;
  width: 1px !important;
  height: 1px !important;
  padding: 0 !important;
  margin: -1px !important;
  overflow: hidden !important;
  clip: rect(0, 0, 0, 0) !important;
  white-space: nowrap !important;
  border: 0 !important;
}

.skip-link {
  position: fixed;
  z-index: 999;
  top: 8px;
  left: 8px;
  padding: 10px 14px;
  color: var(--color-white);
  background: var(--color-primary-dark);
  transform: translateY(-160%);
}

.skip-link:focus {
  transform: translateY(0);
}

.site-header {
  position: relative;
  z-index: 30;
  background: var(--color-white);
  border-bottom: 1px solid var(--color-border);
}

.header-inner {
  display: flex;
  min-height: 80px;
  align-items: center;
  justify-content: space-between;
  gap: 28px;
}

.brand {
  display: inline-flex;
  min-width: 0;
  align-items: center;
  gap: 12px;
  color: var(--color-primary-dark);
  text-decoration: none;
}

.brand img {
  width: 52px;
  height: 52px;
  flex: 0 0 52px;
  object-fit: contain;
}

.brand-text {
  min-width: 0;
}

.brand-name {
  display: block;
  font-size: 20px;
  font-weight: 700;
  line-height: 1.35;
  white-space: nowrap;
}

.site-nav {
  display: flex;
  align-items: stretch;
  gap: 28px;
  font-size: 15px;
  font-weight: 500;
}

.site-nav > a,
.nav-dropdown-toggle {
  position: relative;
  display: flex;
  min-height: 80px;
  align-items: center;
  padding: 0;
  color: var(--color-text);
  background: transparent;
  border: 0;
  text-decoration: none;
  cursor: pointer;
}

.site-nav > a::after,
.nav-dropdown-toggle::after {
  position: absolute;
  right: 0;
  bottom: 0;
  left: 0;
  height: 3px;
  background: var(--color-accent);
  content: "";
  opacity: 0;
}

.site-nav > a:hover,
.site-nav > a:focus-visible,
.nav-dropdown-toggle:hover,
.nav-dropdown-toggle:focus-visible,
.site-nav [aria-current="page"] {
  color: var(--color-primary);
}

.site-nav > a[aria-current="page"]::after,
.nav-dropdown-toggle[aria-current="page"]::after {
  opacity: 1;
}

.nav-dropdown {
  position: relative;
  display: flex;
}

.nav-dropdown-toggle span {
  margin-left: 7px;
  color: var(--color-accent);
  font-size: 10px;
}

.nav-submenu {
  position: absolute;
  top: calc(100% - 1px);
  left: -22px;
  display: none;
  width: 188px;
  padding: 8px 0;
  background: var(--color-white);
  border: 1px solid var(--color-border);
  box-shadow: 0 8px 18px rgba(13, 41, 65, 0.08);
}

.nav-dropdown:hover .nav-submenu,
.nav-dropdown:focus-within .nav-submenu,
.nav-dropdown[data-open="true"] .nav-submenu {
  display: block;
}

.nav-submenu a {
  display: block;
  padding: 10px 20px;
  color: var(--color-text);
  text-decoration: none;
}

.nav-submenu a:hover,
.nav-submenu a:focus-visible,
.nav-submenu a[aria-current="page"] {
  color: var(--color-primary);
  background: var(--color-bg-light);
}

.menu-button {
  display: none;
  width: 42px;
  height: 42px;
  align-items: center;
  justify-content: center;
  flex-direction: column;
  gap: 5px;
  padding: 0;
  background: var(--color-white);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
}

.menu-button span {
  width: 20px;
  height: 2px;
  background: var(--color-primary-dark);
}

.button-row {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 24px;
}

.button {
  display: inline-flex;
  min-height: 44px;
  align-items: center;
  justify-content: center;
  padding: 10px 20px;
  color: var(--color-white);
  background: var(--color-primary);
  border: 1px solid var(--color-primary);
  border-radius: var(--radius);
  font-size: 15px;
  font-weight: 600;
  line-height: 1.4;
  text-align: center;
  text-decoration: none;
  transition: background-color 0.18s ease, border-color 0.18s ease, color 0.18s ease;
}

.button:hover {
  background: var(--color-primary-dark);
  border-color: var(--color-primary-dark);
}

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

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

.button:focus-visible,
.site-nav a:focus-visible,
.nav-dropdown-toggle:focus-visible,
.menu-button:focus-visible {
  outline: 3px solid rgba(179, 90, 45, 0.3);
  outline-offset: 2px;
}

.eyebrow,
.section-kicker {
  margin-bottom: 10px;
  color: var(--color-accent);
  font-size: 14px;
  font-weight: 600;
  line-height: 1.65;
}

.page-hero {
  padding: 64px 0;
  background: var(--color-bg-light);
  border-bottom: 1px solid var(--color-border);
}

.page-hero p:last-child {
  max-width: 820px;
  margin-bottom: 0;
  font-size: 17px;
}

.section {
  padding: 80px 0;
}

.section.alt {
  background: var(--color-bg-light);
}

.section.warm {
  background: var(--color-bg-warm);
}

.section-heading {
  max-width: 820px;
  margin-bottom: 40px;
}

.section-heading.center {
  margin-inline: auto;
  text-align: center;
}

.section-heading h2 {
  margin-bottom: 16px;
}

.section-heading p:last-child {
  margin-bottom: 0;
}

.industrial-carousel {
  overflow: hidden;
  background: #34485f;
}

.carousel-viewport,
.carousel-slide {
  position: relative;
}

.carousel-slide {
  min-height: clamp(360px, 32vw, 470px);
}

.carousel-banner-image {
  width: 100%;
  height: clamp(360px, 32vw, 470px);
  object-fit: cover;
  object-position: center;
}

.home-section {
  padding: 80px 0;
}

.home-section:nth-of-type(even) {
  background: var(--color-bg-light);
}

.home-section-title {
  margin-bottom: 40px;
  text-align: center;
}

.home-section-title p {
  margin-bottom: 8px;
  color: var(--color-accent);
  font-size: 14px;
  font-weight: 600;
}

.home-section-title h2 {
  margin-bottom: 0;
}

.home-section-title span {
  display: block;
  width: 42px;
  height: 2px;
  margin: 16px auto 0;
  background: var(--color-accent);
}

.home-product-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 28px;
  width: min(100%, 1120px);
  margin: 0 auto;
}

.home-product-card {
  display: flex;
  min-width: 0;
  height: 456px;
  flex-direction: column;
  overflow: hidden;
  border: 1px solid var(--color-border);
  background: var(--color-white);
}

.home-product-photo {
  height: 288px;
  flex: 0 0 288px;
  overflow: hidden;
  border-bottom: 1px solid var(--color-border);
  background: #f6f8fa;
}

.home-product-photo img {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: contain;
}

@media (min-width: 721px) {
  .home-product-photo img {
    transform: scale(1.4);
    transform-origin: center;
  }
}

.home-product-content {
  display: flex;
  min-width: 0;
  min-height: 0;
  flex: 1;
  align-items: flex-start;
  flex-direction: column;
  padding: 16px 22px 18px;
}

.home-product-content h3 {
  margin-bottom: 4px;
  font-size: 22px;
}

.home-product-content p {
  display: -webkit-box;
  min-height: 50px;
  margin-bottom: 8px;
  overflow: hidden;
  font-size: 16px;
  line-height: 1.55;
  -webkit-box-orient: vertical;
  -webkit-line-clamp: 2;
}

.home-product-content .button {
  min-height: 44px;
  margin-top: auto;
}

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

.advantage-grid article,
.metric-card,
.fact-card {
  padding: 28px;
  background: var(--color-white);
  border: 1px solid var(--color-border);
  border-top: 3px solid var(--color-accent);
}

.advantage-grid p,
.metric-card p,
.fact-card p {
  margin-bottom: 0;
  font-size: 14px;
  line-height: 1.65;
}

.metric-card strong {
  display: block;
  margin-bottom: 8px;
  color: var(--color-primary-dark);
  font-size: 24px;
  line-height: 1.3;
}

.metric-card span {
  color: var(--color-text-secondary);
  font-size: 14px;
}

.resource-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 28px;
}

.resource-panel {
  padding: 32px;
  background: var(--color-white);
  border: 1px solid var(--color-border);
}

.resource-label {
  margin-bottom: 14px;
  color: var(--color-accent);
  font-size: 14px;
  font-weight: 600;
}

.resource-panel p {
  margin-bottom: 24px;
}

.text-button {
  color: var(--color-primary);
  font-size: 15px;
  font-weight: 600;
  text-decoration: none;
}

.text-button:hover {
  text-decoration: underline;
}

.home-contact-band,
.cta-band {
  padding: 42px 0;
  color: var(--color-white);
  background: var(--color-primary);
}

.home-contact-inner,
.cta-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 32px;
}

.home-contact-band h2,
.cta-band h2 {
  margin-bottom: 8px;
  color: var(--color-white);
}

.home-contact-band p,
.cta-band p {
  max-width: 760px;
  margin-bottom: 0;
  color: #dbe6ee;
}

.home-contact-actions,
.cta-actions {
  display: flex;
  flex: 0 0 auto;
  flex-wrap: wrap;
  gap: 12px;
}

.home-contact-band .button,
.cta-band .button {
  color: var(--color-primary-dark);
  background: var(--color-white);
  border-color: var(--color-white);
}

.home-contact-band .button.secondary,
.cta-band .button.secondary {
  color: var(--color-white);
  background: transparent;
  border-color: rgba(255, 255, 255, 0.8);
}

.product-intro-grid {
  display: grid;
  grid-template-columns: minmax(0, 1.1fr) minmax(360px, 0.9fr);
  align-items: center;
  gap: 48px;
}

.product-photo {
  overflow: hidden;
  aspect-ratio: 4 / 3;
  background: #f5f6f7;
  border: 1px solid var(--color-border);
}

.product-photo img {
  width: 100%;
  height: 100%;
  padding: 28px;
  object-fit: contain;
}

.detail-copy > p:last-of-type {
  margin-bottom: 0;
}

.fact-list {
  margin: 24px 0 0;
  padding: 0;
  border-top: 1px solid var(--color-border);
  list-style: none;
}

.fact-list li {
  display: grid;
  grid-template-columns: 120px 1fr;
  gap: 16px;
  padding: 12px 0;
  border-bottom: 1px solid var(--color-border);
}

.fact-list strong {
  color: var(--color-primary-dark);
}

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

.product-gallery-grid figure {
  margin: 0;
  overflow: hidden;
  aspect-ratio: 4 / 3;
  background: #f5f6f7;
  border: 1px solid var(--color-border);
}

.product-gallery-grid img {
  width: 100%;
  height: 100%;
  padding: 12px;
  object-fit: contain;
}

.table-scroll {
  width: 100%;
  overflow-x: auto;
  border: 1px solid var(--color-border);
  background: var(--color-white);
  -webkit-overflow-scrolling: touch;
}

.data-table {
  width: 100%;
  min-width: 880px;
  border-collapse: collapse;
  font-size: 14px;
  line-height: 1.55;
}

.data-table th,
.data-table td {
  padding: 13px 14px;
  text-align: left;
  vertical-align: middle;
  border-bottom: 1px solid var(--color-border);
}

.data-table th {
  color: var(--color-primary-dark);
  background: #edf1f4;
  font-weight: 600;
  white-space: nowrap;
}

.data-table td:first-child,
.data-table td:nth-child(2) {
  font-weight: 600;
}

.data-table td:nth-child(2) {
  white-space: nowrap;
}

.data-table tbody tr:last-child td {
  border-bottom: 0;
}

.table-hint,
.section-note {
  margin: 14px 0 0;
  color: var(--color-text-secondary);
  font-size: 14px;
  line-height: 1.65;
}

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

.feature-grid article {
  padding: 28px;
  border: 1px solid var(--color-border);
  background: var(--color-white);
}

.feature-grid p {
  margin-bottom: 0;
  font-size: 14px;
  line-height: 1.65;
}

.document-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 20px;
}

.document-card {
  display: flex;
  min-width: 0;
  flex-direction: column;
  background: var(--color-white);
  border: 1px solid var(--color-border);
}

.document-card img {
  width: 100%;
  aspect-ratio: 4 / 3;
  padding: 12px;
  object-fit: contain;
  background: #f8f9fa;
  border-bottom: 1px solid var(--color-border);
}

.document-card > div {
  display: flex;
  flex: 1;
  align-items: flex-start;
  flex-direction: column;
  padding: 24px;
}

.document-card p {
  margin-bottom: 0;
  font-size: 14px;
}

.document-card .button {
  margin-top: 20px;
}

.manual-panel {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  align-items: center;
  gap: 32px;
  padding: 32px;
  border: 1px solid var(--color-border);
  background: var(--color-white);
}

.manual-panel h3 {
  margin-bottom: 6px;
}

.manual-panel p {
  margin-bottom: 10px;
}

.document-meta {
  color: var(--color-text-secondary);
  font-size: 14px;
  line-height: 1.65;
}

.certificate-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 20px;
}

.certificate-card {
  display: grid;
  min-width: 0;
  grid-template-columns: 138px minmax(0, 1fr);
  gap: 24px;
  padding: 24px;
  background: var(--color-white);
  border: 1px solid var(--color-border);
}

.certificate-card img {
  width: 138px;
  height: 194px;
  object-fit: cover;
  object-position: top;
  border: 1px solid var(--color-border);
}

.certificate-card > div {
  display: flex;
  min-width: 0;
  align-items: flex-start;
  flex-direction: column;
}

.certificate-meta {
  display: grid;
  gap: 4px;
  margin-bottom: 18px;
  color: var(--color-text-secondary);
  font-size: 14px;
}

.certificate-card .button {
  margin-top: auto;
}

.download-index {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-bottom: 48px;
}

.download-index a {
  padding: 8px 14px;
  color: var(--color-primary);
  background: var(--color-white);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  font-size: 14px;
  text-decoration: none;
}

.download-index a:hover {
  border-color: var(--color-primary);
}

.download-group + .download-group {
  margin-top: 48px;
}

.download-group .section-heading {
  margin-bottom: 20px;
}

.download-list {
  display: grid;
  gap: 0;
  margin: 0;
  padding: 0;
  border-top: 1px solid var(--color-border);
  list-style: none;
}

.download-item {
  display: grid;
  grid-template-columns: 44px minmax(0, 1fr) auto;
  align-items: center;
  gap: 18px;
  padding: 18px 0;
  border-bottom: 1px solid var(--color-border);
}

.download-item.featured {
  padding: 24px;
  background: var(--color-bg-light);
  border: 1px solid var(--color-border);
}

.doc-icon {
  display: inline-flex;
  width: 42px;
  height: 42px;
  align-items: center;
  justify-content: center;
  color: var(--color-accent);
  background: var(--color-white);
  border: 1px solid var(--color-border);
  font-size: 12px;
  font-weight: 700;
}

.download-copy {
  min-width: 0;
}

.download-copy strong {
  display: block;
  margin-bottom: 3px;
  color: var(--color-primary-dark);
  font-size: 16px;
  line-height: 1.55;
}

.download-copy p {
  margin: 4px 0 6px;
  font-size: 14px;
  line-height: 1.65;
}

.download-actions {
  display: flex;
  flex-wrap: wrap;
  justify-content: flex-end;
  gap: 10px;
}

.download-actions .button {
  min-width: 90px;
}

.about-grid,
.contact-grid {
  display: grid;
  grid-template-columns: minmax(0, 1.2fr) minmax(330px, 0.8fr);
  gap: 48px;
  align-items: start;
}

.about-copy p {
  max-width: 800px;
}

.about-facts {
  display: grid;
  margin: 0;
  border-top: 1px solid var(--color-border);
}

.about-facts div {
  padding: 20px 0;
  border-bottom: 1px solid var(--color-border);
}

.about-facts dt {
  color: var(--color-text-secondary);
  font-size: 14px;
}

.about-facts dd {
  margin: 5px 0 0;
  color: var(--color-primary-dark);
  font-size: 20px;
  font-weight: 600;
  line-height: 1.5;
}

.contact-panel,
.contact-note {
  padding: 32px;
  background: var(--color-white);
  border: 1px solid var(--color-border);
}

.contact-note {
  background: var(--color-bg-light);
}

.contact-list,
.checklist {
  margin: 0;
  padding: 0;
  list-style: none;
}

.contact-list li {
  display: grid;
  grid-template-columns: 100px minmax(0, 1fr);
  gap: 18px;
  padding: 14px 0;
  border-bottom: 1px solid var(--color-border);
}

.contact-list li:last-child {
  border-bottom: 0;
}

.contact-list a {
  color: var(--color-primary);
  text-decoration: none;
}

.checklist {
  display: grid;
  gap: 10px;
}

.checklist li {
  position: relative;
  padding-left: 20px;
  color: var(--color-text-secondary);
}

.checklist li::before {
  position: absolute;
  top: 0.72em;
  left: 0;
  width: 6px;
  height: 6px;
  background: var(--color-accent);
  content: "";
}

.site-footer {
  padding-top: 44px;
  color: #d8e2e9;
  background: var(--color-primary-dark);
}

.footer-main,
.home-footer-main {
  display: grid;
  grid-template-columns: 1.35fr 0.8fr 0.9fr;
  gap: 48px;
  padding-bottom: 32px;
}

.footer-brand,
.footer-heading {
  margin-bottom: 10px;
  color: var(--color-white);
  font-size: 16px;
  font-weight: 600;
}

.site-footer p {
  margin-bottom: 6px;
  color: #b8c7d2;
  font-size: 14px;
}

.footer-address {
  max-width: 430px;
}

.footer-links,
.home-footer-links,
.home-footer-contact {
  display: grid;
  align-content: start;
  gap: 6px;
}

.footer-links a,
.home-footer-links a,
.home-footer-contact a {
  color: #c7d4dd;
  font-size: 14px;
  text-decoration: none;
}

.home-footer-contact div {
  display: grid;
  grid-template-columns: 48px 1fr;
  gap: 10px;
}

.home-footer-contact span {
  color: #829aad;
  font-size: 14px;
}

.footer-links a:hover,
.home-footer-links a:hover,
.home-footer-contact a:hover {
  color: var(--color-white);
}

.footer-bottom {
  padding: 18px 0 22px;
  color: #8da2b2;
  border-top: 1px solid rgba(255, 255, 255, 0.12);
  font-size: 13px;
}

.footer-record {
  margin-left: 20px;
}

.not-found {
  display: flex;
  min-height: 62vh;
  align-items: center;
  padding: 80px 0;
  text-align: center;
}

.not-found-code {
  margin-bottom: 8px;
  color: var(--color-accent);
  font-size: 72px;
  font-weight: 700;
  line-height: 1;
}

@media (max-width: 1080px) {
  .site-nav {
    gap: 20px;
  }

  .brand-name {
    font-size: 18px;
  }

  .home-product-card {
    height: 456px;
  }

  .home-product-content p {
    min-height: 0;
  }

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

@media (max-width: 979px) {
  .header-inner {
    min-height: 72px;
  }

  .brand img {
    width: 46px;
    height: 46px;
    flex-basis: 46px;
  }

  .menu-button {
    display: flex;
    flex: 0 0 42px;
  }

  .site-nav {
    position: absolute;
    top: 100%;
    right: 0;
    left: 0;
    display: none;
    align-items: stretch;
    flex-direction: column;
    gap: 0;
    padding: 8px 24px 18px;
    background: var(--color-white);
    border-bottom: 1px solid var(--color-border);
    box-shadow: 0 12px 22px rgba(13, 41, 65, 0.1);
  }

  .site-nav[data-open="true"] {
    display: flex;
  }

  .site-nav > a,
  .nav-dropdown-toggle {
    width: 100%;
    min-height: 48px;
    justify-content: space-between;
    border-bottom: 1px solid var(--color-border);
  }

  .site-nav > a::after,
  .nav-dropdown-toggle::after {
    display: none;
  }

  .nav-dropdown {
    display: block;
  }

  .nav-submenu {
    position: static;
    width: 100%;
    padding: 4px 0 6px;
    border: 0;
    box-shadow: none;
  }

  .nav-submenu a {
    padding: 9px 16px;
  }

  .product-intro-grid,
  .about-grid,
  .contact-grid {
    grid-template-columns: 1fr;
  }

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

  .footer-main,
  .home-footer-main {
    grid-template-columns: 1.3fr 0.8fr;
  }

  .footer-main > :last-child,
  .home-footer-main > :last-child {
    grid-column: 1 / -1;
  }
}

@media (max-width: 720px) {
  .container {
    width: min(calc(100% - 32px), var(--content-width));
  }

  h1 {
    font-size: 30px;
  }

  h2 {
    font-size: 24px;
  }

  h3 {
    font-size: 18px;
  }

  .brand-name {
    font-size: 15px;
    white-space: normal;
  }

  .brand img {
    width: 42px;
    height: 42px;
    flex-basis: 42px;
  }

  .page-hero {
    padding: 44px 0;
  }

  .page-hero p:last-child {
    font-size: 16px;
  }

  .section,
  .home-section {
    padding: 48px 0;
  }

  .section-heading,
  .home-section-title {
    margin-bottom: 28px;
  }

  .carousel-slide,
  .carousel-banner-image {
    min-height: 250px;
    height: 250px;
  }

  .carousel-banner-image {
    object-position: 65% center;
  }

  .home-product-grid,
  .resource-grid,
  .advantage-grid,
  .metric-grid,
  .fact-grid,
  .feature-grid,
  .document-grid,
  .certificate-grid,
  .product-gallery-grid {
    grid-template-columns: 1fr;
  }

  .home-product-content,
  .resource-panel,
  .advantage-grid article,
  .metric-card,
  .fact-card,
  .feature-grid article,
  .contact-panel,
  .contact-note {
    padding: 22px;
  }

  .home-product-card {
    height: auto;
    min-height: 438px;
  }

  .home-product-photo {
    height: auto;
    flex: 0 0 auto;
    aspect-ratio: 4 / 3;
  }

  .home-product-card .home-product-content {
    min-height: 150px;
    padding: 16px 18px 18px;
  }

  .home-contact-inner,
  .cta-inner {
    align-items: flex-start;
    flex-direction: column;
    gap: 24px;
  }

  .home-contact-actions,
  .cta-actions {
    width: 100%;
  }

  .home-contact-actions .button,
  .cta-actions .button {
    flex: 1 1 140px;
  }

  .product-intro-grid {
    gap: 28px;
  }

  .product-photo img {
    padding: 18px;
  }

  .fact-list li {
    grid-template-columns: 100px 1fr;
    gap: 12px;
  }

  .manual-panel {
    grid-template-columns: 1fr;
    padding: 24px;
  }

  .certificate-card {
    grid-template-columns: 100px minmax(0, 1fr);
    gap: 18px;
    padding: 20px;
  }

  .certificate-card img {
    width: 100px;
    height: 142px;
  }

  .download-index {
    margin-bottom: 36px;
  }

  .download-item,
  .download-item.featured {
    grid-template-columns: 38px minmax(0, 1fr);
    gap: 14px;
    padding: 18px 0;
  }

  .download-item.featured {
    padding: 20px;
  }

  .download-actions {
    grid-column: 1 / -1;
    justify-content: flex-start;
  }

  .download-actions .button {
    flex: 1 1 120px;
  }

  .contact-list li {
    grid-template-columns: 1fr;
    gap: 4px;
  }

  .footer-main,
  .home-footer-main {
    grid-template-columns: 1fr;
    gap: 24px;
  }

  .footer-main > :last-child,
  .home-footer-main > :last-child {
    grid-column: auto;
  }

  .footer-record {
    display: block;
    margin: 4px 0 0;
  }
}

@media (max-width: 390px) {
  .container {
    width: min(calc(100% - 28px), var(--content-width));
  }

  .brand {
    gap: 8px;
  }

  .brand-name {
    font-size: 14px;
    line-height: 1.35;
  }

  .menu-button {
    width: 40px;
    height: 40px;
    flex-basis: 40px;
  }

  .button-row .button {
    flex: 1 1 130px;
  }

  .certificate-card {
    grid-template-columns: 84px minmax(0, 1fr);
    gap: 14px;
  }

  .certificate-card img {
    width: 84px;
    height: 119px;
  }
}

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }

  *,
  *::before,
  *::after {
    transition-duration: 0.01ms !important;
  }
}