:root {
  --store-primary: #1f2937;
  --store-primary-dark: #111827;
  --store-accent: #f5b400;
  --store-accent-2: #ff7a1a;
  --store-ink: #17202a;
  --store-muted: #667085;
  --store-border: #d6ded8;
  --store-bg: #f7f5ef;
  --store-surface: #ffffff;
  --store-soft: #eef4ef;
  --store-warm: #fff4dc;
  --store-radius: 8px;
  --store-max: 1160px;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  font-family: "DM Sans", system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  color: var(--store-ink);
  background: var(--store-bg);
  background-image: radial-gradient(circle at 12% 0%, rgba(217, 164, 65, 0.18), transparent 28%), linear-gradient(180deg, #fbfaf6 0, #f7f5ef 360px, #eef4ef 100%);
  line-height: 1.5;
}

a { color: var(--store-primary); text-decoration: none; }
a:hover { color: var(--store-accent-2); }

.store-header {
  background: rgba(255,255,255,0.94);
  border-bottom: 1px solid var(--store-border);
  box-shadow: 0 10px 28px rgba(15, 55, 72, 0.08);
  padding: 14px 20px;
  position: sticky;
  top: 0;
  z-index: 30;
  backdrop-filter: blur(12px);
}

.store-header-inner {
  max-width: var(--store-max);
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
}

.store-logo {
  font-weight: 900;
  color: var(--store-primary-dark);
  font-size: 1.08rem;
}

.store-logo span { color: var(--store-accent-2); }

.store-nav {
  display: flex;
  gap: 16px;
  align-items: center;
  font-size: 0.92rem;
  flex-wrap: wrap;
}

.store-cart-badge {
  background: var(--store-primary);
  color: #fff;
  border-radius: 999px;
  padding: 6px 12px;
  font-size: 0.85rem;
}

main {
  max-width: var(--store-max);
  margin: 0 auto;
  padding: 28px 20px 48px;
}

.store-hero {
  color: #fff;
  border-radius: var(--store-radius);
  padding: 44px 34px;
  margin-bottom: 30px;
}

.energy-hero {
  display: grid;
  grid-template-columns: minmax(0, 1.08fr) minmax(300px, 0.92fr);
  gap: 32px;
  align-items: center;
  min-height: 430px;
  background: linear-gradient(135deg, #111827 0%, #243143 48%, #8a6417 100%);
  overflow: hidden;
}

.store-kicker {
  color: var(--store-accent);
  font-size: 0.78rem;
  font-weight: 850;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.store-hero h1,
.page-heading h1,
.section-heading h2,
.store-note-panel h2,
.contact-panel h2,
.spec-panel h2 {
  margin: 8px 0 12px;
  line-height: 1.08;
}

.store-hero h1 { max-width: 740px; font-size: clamp(2rem, 4vw, 4rem); }
.store-hero p { margin: 0; opacity: 0.93; max-width: 62ch; }

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

.hero-product {
  background: rgba(255,255,255,0.08);
  border: 1px solid rgba(255,255,255,0.18);
  border-radius: var(--store-radius);
  padding: 18px;
}

.hero-product img,
.section-image,
.contact-panel img {
  width: 100%;
  display: block;
  border-radius: var(--store-radius);
}

.hero-product img { max-height: 360px; object-fit: contain; background: #fff; }

.page-heading { margin-bottom: 22px; }
.page-heading h1 { font-size: clamp(2rem, 3vw, 3rem); }
.store-section { margin-top: 34px; }
.section-heading { margin-bottom: 16px; }
.section-heading p { color: var(--store-muted); max-width: 760px; }

.store-feature-grid,
.store-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: 18px;
}

.store-feature,
.store-card,
.store-form,
.store-note-panel,
.contact-panel,
.spec-panel {
  background: var(--store-surface);
  border: 1px solid var(--store-border);
  border-radius: var(--store-radius);
}

.store-feature { padding: 18px; }
.store-feature strong { display: block; color: var(--store-primary-dark); margin-bottom: 6px; }

.store-feature span,
.store-note,
.product-name-zh,
.product-subtitle,
.product-note {
  color: var(--store-muted);
}

.split-section,
.contact-panel,
.spec-panel {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(260px, 0.72fr);
  gap: 24px;
  align-items: center;
}

.contact-panel,
.spec-panel,
.store-note-panel { padding: 24px; }

.contact-panel img { max-height: 320px; object-fit: contain; background: #fff; }

.contact-qr-card {
  margin: 0;
  justify-self: center;
  width: min(100%, 260px);
}

.contact-qr-card img {
  border: 1px solid var(--store-border);
  padding: 12px;
}

.contact-qr-card figcaption {
  color: var(--store-muted);
  font-size: 0.88rem;
  margin-top: 8px;
  text-align: center;
}

.section-image {
  max-height: 320px;
  object-fit: contain;
  background: #fff;
  border: 1px solid var(--store-border);
}

.store-filter-strip {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin: 18px 0 8px;
}

.store-filter-strip span {
  border: 1px solid var(--store-border);
  background: var(--store-surface);
  border-radius: 999px;
  color: var(--store-primary-dark);
  font-size: 0.86rem;
  font-weight: 750;
  padding: 7px 12px;
}

.store-card {
  overflow: hidden;
  display: flex;
  flex-direction: column;
}

.store-card img,
.product-placeholder {
  width: 100%;
  aspect-ratio: 4/3;
  object-fit: contain;
  background: #fff;
}

.product-placeholder {
  display: grid;
  place-items: center;
  background: var(--store-soft);
}

.product-placeholder span {
  color: var(--store-primary-dark);
  font-weight: 800;
  background: rgba(255,255,255,0.82);
  border: 1px solid var(--store-border);
  border-radius: 999px;
  padding: 7px 12px;
}

.store-card-body {
  padding: 16px;
  flex: 1;
  display: flex;
  flex-direction: column;
  gap: 9px;
}

.product-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.product-meta span {
  background: var(--store-warm);
  color: var(--store-primary-dark);
  border-radius: 999px;
  font-size: 0.75rem;
  font-weight: 800;
  padding: 5px 8px;
}

.product-name-zh { font-size: 0.88rem; }

.product-subtitle,
.product-note {
  font-size: 0.9rem;
  margin: 0;
}

.product-bullets,
.check-list {
  margin: 0;
  padding-left: 18px;
  color: #374151;
}

.product-bullets { font-size: 0.9rem; }
.check-list li { margin: 7px 0; }

.product-specs {
  display: grid;
  gap: 6px;
  margin: 0;
}

.product-specs div {
  display: flex;
  justify-content: space-between;
  gap: 12px;
  border-bottom: 1px solid var(--store-border);
  padding-bottom: 6px;
  font-size: 0.86rem;
}

.product-specs dt { color: var(--store-muted); }
.product-specs dd { margin: 0; font-weight: 750; text-align: right; }

.detail-link {
  color: var(--store-primary-dark);
  font-size: 0.9rem;
  font-weight: 750;
  text-decoration: underline;
  text-underline-offset: 3px;
}

.product-safety {
  margin: 0;
  border-left: 3px solid var(--store-accent);
  padding-left: 10px;
  color: var(--store-primary-dark);
  font-size: 0.88rem;
  font-weight: 750;
}

.store-price {
  font-size: 1.12rem;
  font-weight: 850;
  color: var(--store-accent-2);
  margin-top: auto;
}

.store-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 10px 16px;
  border-radius: var(--store-radius);
  border: none;
  cursor: pointer;
  font-weight: 750;
  font-size: 0.92rem;
}

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

.store-btn-secondary {
  background: #fff;
  color: var(--store-primary-dark);
  border: 1px solid var(--store-border);
}

.store-table {
  width: 100%;
  border-collapse: collapse;
  background: #fff;
  border-radius: var(--store-radius);
  overflow: hidden;
}

.store-table th,
.store-table td {
  padding: 12px 14px;
  border-bottom: 1px solid var(--store-border);
  text-align: left;
}

.store-form {
  padding: 24px;
  max-width: 540px;
}

.store-form label {
  display: block;
  font-weight: 750;
  margin: 12px 0 6px;
  font-size: 0.88rem;
}

.store-form input {
  width: 100%;
  padding: 10px 12px;
  border: 1px solid var(--store-border);
  border-radius: 6px;
  font-size: 1rem;
}

.store-note {
  font-size: 0.9rem;
  margin-top: 16px;
}

.store-footer {
  text-align: center;
  padding: 24px;
  font-size: 0.85rem;
  color: var(--store-muted);
}

@media (max-width: 760px) {
  .store-header-inner,
  .split-section,
  .contact-panel,
  .spec-panel {
    align-items: flex-start;
    grid-template-columns: 1fr;
  }

  .energy-hero {
    grid-template-columns: 1fr;
    min-height: 0;
  }

  .store-table { font-size: 0.88rem; }
}


.lang-switch {
  display: inline-flex;
  gap: 4px;
  border: 1px solid var(--store-border);
  border-radius: 999px;
  padding: 3px;
  background: #fff;
}

.lang-switch button {
  border: 0;
  border-radius: 999px;
  background: transparent;
  color: var(--store-primary-dark);
  cursor: pointer;
  font-size: 0.8rem;
  font-weight: 800;
  padding: 5px 9px;
}

.lang-switch button.active {
  background: var(--store-primary);
  color: #fff;
}

.company-profile {
  display: grid;
  grid-template-columns: minmax(0, 0.9fr) minmax(320px, 1.1fr);
  gap: 24px;
  align-items: start;
  background: var(--store-surface);
  border: 1px solid var(--store-border);
  border-radius: var(--store-radius);
  padding: 24px;
}

.company-proof-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
  gap: 12px;
}

.company-proof-grid article {
  background: var(--store-soft);
  border-radius: var(--store-radius);
  padding: 14px;
}

.company-proof-grid strong,
.company-proof-grid span {
  display: block;
}

.company-proof-grid span {
  color: var(--store-muted);
  font-size: 0.9rem;
  margin-top: 6px;
}

@media (max-width: 760px) {
  .company-profile {
    grid-template-columns: 1fr;
  }
}
.catalog-groups {
  display: grid;
  gap: 28px;
}

.product-category-group {
  display: grid;
  gap: 14px;
}

.product-category-heading {
  align-items: center;
  border-bottom: 1px solid var(--store-border);
  display: flex;
  justify-content: space-between;
  gap: 16px;
  padding-bottom: 8px;
}

.product-category-heading h3 {
  margin: 0;
  font-size: 1.25rem;
}

.product-category-heading span {
  color: var(--store-muted);
  font-size: 0.9rem;
  font-weight: 750;
}

.product-image-link {
  background: #fff;
  display: block;
}

.store-card img {
  aspect-ratio: 1 / 1;
  object-fit: contain;
  padding: 14px;
}

.product-parameters {
  background: #f7faf6;
  border: 1px solid var(--store-border);
  border-radius: var(--store-radius);
  padding: 12px;
}

.parameter-title {
  color: var(--store-primary-dark);
  display: block;
  font-size: 0.86rem;
  font-weight: 850;
  margin-bottom: 8px;
}

.product-parameters dl {
  display: grid;
  gap: 8px;
  margin: 0;
}

.product-parameters div {
  border-bottom: 1px solid var(--store-border);
  display: grid;
  gap: 3px;
  padding-bottom: 7px;
}

.product-parameters div:last-child {
  border-bottom: 0;
  padding-bottom: 0;
}

.product-parameters dt {
  color: var(--store-muted);
  font-size: 0.78rem;
  font-weight: 800;
}

.product-parameters dd {
  color: var(--store-ink);
  font-size: 0.88rem;
  margin: 0;
}


.source-link {
  color: var(--store-primary-dark);
  font-size: 0.86rem;
  font-weight: 760;
  text-decoration: none;
}

.source-link:hover { text-decoration: underline; }


.product-category-nav {
  position: sticky;
  top: 68px;
  z-index: 20;
  display: flex;
  gap: 10px;
  overflow-x: auto;
  padding: 12px 0;
  margin: 8px 0 20px;
  background: rgba(244, 246, 241, 0.94);
  backdrop-filter: blur(10px);
  scroll-margin-top: 20px;
}

.product-nav-link {
  flex: 0 0 auto;
  min-width: 148px;
  border: 1px solid var(--store-border);
  background: #fff;
  color: var(--store-ink);
  border-radius: 8px;
  padding: 10px 12px;
  text-decoration: none;
}

.product-nav-link span {
  display: block;
  font-size: 0.84rem;
  font-weight: 820;
  line-height: 1.25;
}

.product-nav-link strong {
  display: block;
  color: var(--store-primary-dark);
  font-size: 0.76rem;
  margin-top: 4px;
}

.product-nav-link:hover,
.product-nav-link.active {
  border-color: var(--store-primary);
  box-shadow: 0 8px 18px rgba(15, 55, 72, 0.12);
}

.product-category-group {
  scroll-margin-top: 150px;
}


@media (max-width: 760px) {
  .product-category-nav { top: 112px; }
  .product-category-group { scroll-margin-top: 190px; }
}

@media (max-width: 640px) {
  .store-header {
    padding: 10px 12px;
  }

  .store-header-inner {
    display: grid;
    grid-template-columns: 1fr;
    gap: 8px;
  }

  .store-logo {
    font-size: 1rem;
  }

  .store-nav {
    flex-wrap: nowrap;
    gap: 8px;
    overflow-x: auto;
    padding-bottom: 2px;
    scrollbar-width: none;
    width: 100%;
  }

  .store-nav::-webkit-scrollbar,
  .product-category-nav::-webkit-scrollbar {
    display: none;
  }

  .store-nav a,
  .lang-switch {
    flex: 0 0 auto;
  }

  main {
    padding: 18px 12px 40px;
  }

  .page-heading {
    padding-top: 4px;
  }

  .page-heading h1 {
    font-size: 1.76rem;
  }

  .store-filter-strip {
    gap: 8px;
    overflow-x: auto;
    flex-wrap: nowrap;
    padding-bottom: 4px;
  }

  .store-filter-strip span {
    flex: 0 0 auto;
    white-space: nowrap;
  }

  .product-category-nav {
    top: 104px;
    gap: 8px;
    margin: 6px -12px 16px;
    padding: 10px 12px;
  }

  .product-nav-link {
    min-width: 132px;
    max-width: 180px;
    padding: 9px 10px;
  }

  .product-nav-link span {
    font-size: 0.78rem;
  }

  .store-grid,
  .store-feature-grid {
    grid-template-columns: 1fr;
    gap: 14px;
  }

  .store-card-body {
    padding: 14px;
  }

  .product-meta {
    gap: 6px;
  }

  .product-meta span {
    max-width: 100%;
    overflow-wrap: anywhere;
  }

  .product-parameters div,
  .product-specs div {
    grid-template-columns: 0.42fr 0.58fr;
    align-items: start;
  }

  .product-specs div {
    display: grid;
  }

  .product-specs dd {
    overflow-wrap: anywhere;
  }

  .store-btn {
    width: 100%;
  }

  .product-category-group {
    scroll-margin-top: 180px;
  }
}



.material-update-panel {
  background: var(--store-surface);
  border: 1px solid var(--store-border);
  border-radius: var(--store-radius);
  padding: 24px;
}

.material-summary-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
  gap: 12px;
  margin: 16px 0 20px;
}

.material-summary-grid article {
  background: var(--store-soft);
  border-radius: 8px;
  padding: 14px;
}

.material-summary-grid strong {
  display: block;
  color: var(--store-accent-2);
  font-size: 1.45rem;
}

.material-summary-grid span {
  color: var(--store-muted);
  font-size: 0.86rem;
  font-weight: 750;
}

.material-table-wrap {
  margin-top: 18px;
  overflow-x: auto;
}

.material-table-wrap h3 {
  margin: 0 0 10px;
}

.material-table {
  min-width: 760px;
  font-size: 0.84rem;
}

.material-table td {
  vertical-align: top;
}


/* DN Power background polish */
.page-heading,
.section-heading {
  background: rgba(255, 255, 255, 0.48);
  border-radius: 8px;
}

.store-note-panel,
.spec-panel,
.company-profile,
.material-update-panel {
  box-shadow: 0 18px 42px rgba(24, 44, 36, 0.08);
}

.store-card,
.store-feature,
.contact-panel,
.store-form {
  box-shadow: 0 14px 32px rgba(24, 44, 36, 0.07);
}

.store-card img,
.hero-product img,
.section-image,
.contact-panel img {
  background: #fffdf7;
}


.compact-product-card .store-card-body {
  gap: 10px;
}

.compact-product-card .store-btn {
  margin-top: auto;
}

.compact-parameters {
  margin-top: 2px;
}

.compact-parameters dl {
  gap: 6px;
}

.compact-parameters div {
  grid-template-columns: 0.38fr 0.62fr;
}


/* DN Power premium certification polish */
.store-header {
  background: rgba(255, 255, 255, 0.9);
  border-bottom: 1px solid rgba(9, 47, 45, 0.08);
  box-shadow: 0 12px 30px rgba(9, 47, 45, 0.08);
  backdrop-filter: blur(16px);
}

.page-heading.catalog-heading {
  padding: 28px;
  border: 1px solid rgba(9, 47, 45, 0.1);
  border-radius: var(--store-radius);
  background: linear-gradient(135deg, rgba(255,255,255,0.95), rgba(238,244,239,0.92));
  box-shadow: 0 22px 50px rgba(9, 47, 45, 0.08);
}

.store-kicker {
  color: var(--store-accent-2);
  letter-spacing: 0.08em;
}

.store-card,
.certification-panel,
.spec-panel,
.company-profile,
.contact-panel {
  border: 1px solid rgba(9, 47, 45, 0.1);
  box-shadow: 0 20px 46px rgba(9, 47, 45, 0.08);
}

.store-card {
  background: linear-gradient(180deg, #ffffff 0%, #fffdf8 100%);
}

.store-card img {
  background: linear-gradient(180deg, #ffffff 0%, #f7f5ef 100%);
}

.product-nav-link {
  background: rgba(255, 255, 255, 0.92);
}

.product-nav-link:hover,
.product-nav-link.active {
  border-color: rgba(217, 164, 65, 0.72);
  box-shadow: 0 12px 28px rgba(9, 47, 45, 0.12);
}

.store-btn.primary,
.store-card .store-btn {
  background: linear-gradient(135deg, #0f766e, #092f2d);
  border-color: transparent;
  color: #fff;
  box-shadow: 0 12px 24px rgba(15, 118, 110, 0.22);
}

.certification-panel {
  padding: 28px;
  border-radius: var(--store-radius);
  background: linear-gradient(135deg, #092f2d 0%, #134f48 54%, #0b2f2d 100%);
  color: #fff;
  overflow: hidden;
}

.certification-panel .section-heading h2,
.certification-panel .store-note {
  color: #fff;
}

.certification-panel .store-note {
  opacity: 0.78;
}

.cert-gallery {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 16px;
  margin-top: 20px;
}

.cert-card {
  min-height: 320px;
  overflow: hidden;
  border: 1px solid rgba(255, 255, 255, 0.16);
  border-radius: 8px;
  background: rgba(255, 255, 255, 0.08);
  box-shadow: 0 18px 38px rgba(0, 0, 0, 0.18);
}

.cert-media {
  height: 210px;
  display: grid;
  place-items: center;
  background: #f8f5ec;
}

.cert-media img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: top center;
  display: block;
}

.cert-file-mark {
  width: 76%;
  min-height: 136px;
  display: grid;
  place-items: center;
  text-align: center;
  border: 1px solid rgba(9, 47, 45, 0.16);
  background: #fff;
  color: var(--store-primary-dark);
  box-shadow: 0 14px 30px rgba(9, 47, 45, 0.1);
}

.cert-file-mark strong {
  font-size: 1.55rem;
}

.cert-file-mark span {
  color: var(--store-accent-2);
  font-weight: 800;
}

.cert-copy {
  padding: 16px;
}

.cert-type {
  color: #f4c66d;
  font-size: 0.76rem;
  font-weight: 900;
  text-transform: uppercase;
}

.cert-copy h3 {
  margin: 6px 0;
  font-size: 1.05rem;
  color: #fff;
}

.cert-copy p {
  margin: 0;
  color: rgba(255, 255, 255, 0.72);
  font-size: 0.9rem;
}

@media (max-width: 640px) {
  .page-heading.catalog-heading,
  .certification-panel {
    padding: 20px;
  }

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


/* DN Power certification center */
.certification-heading {
  position: relative;
  overflow: hidden;
}

.certification-heading::after {
  content: "";
  position: absolute;
  top: 0;
  right: 7%;
  width: 116px;
  height: 5px;
  background: var(--store-accent);
}

.certification-category-nav {
  position: sticky;
  top: 68px;
  z-index: 20;
  display: flex;
  gap: 10px;
  overflow-x: auto;
  margin: 8px 0 20px;
  padding: 12px 0;
  background: rgba(247, 245, 239, 0.94);
  border-bottom: 1px solid rgba(9, 47, 45, 0.08);
  backdrop-filter: blur(12px);
}

.cert-nav-link {
  flex: 0 0 auto;
  min-width: 150px;
  padding: 10px 12px;
  border: 1px solid rgba(9, 47, 45, 0.12);
  border-radius: 7px;
  background: rgba(255, 255, 255, 0.88);
  color: var(--store-primary-dark);
  box-shadow: 0 8px 18px rgba(9, 47, 45, 0.05);
}

.cert-nav-link span,
.cert-nav-link strong {
  display: block;
}

.cert-nav-link span {
  font-size: 0.82rem;
  font-weight: 800;
}

.cert-nav-link strong {
  margin-top: 4px;
  color: var(--store-accent-2);
  font-size: 0.76rem;
}

.cert-nav-link:hover,
.cert-nav-link.active {
  border-color: rgba(217, 164, 65, 0.78);
  background: #fffdf7;
  box-shadow: 0 12px 26px rgba(9, 47, 45, 0.12);
}

.certification-directory {
  padding: 28px;
  border: 1px solid rgba(9, 47, 45, 0.1);
  border-radius: var(--store-radius);
  background: rgba(255, 255, 255, 0.78);
  box-shadow: 0 20px 46px rgba(9, 47, 45, 0.08);
}

.certification-groups {
  display: grid;
  gap: 24px;
}

.certification-group {
  scroll-margin-top: 148px;
}

.certification-group-heading {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 16px;
  margin-bottom: 12px;
  padding-bottom: 10px;
  border-bottom: 1px solid rgba(9, 47, 45, 0.12);
}

.certification-group-heading h2 {
  margin: 0;
  color: var(--store-primary-dark);
  font-size: 1.25rem;
}

.certification-group-heading span {
  color: var(--store-accent-2);
  font-size: 0.82rem;
  font-weight: 900;
  white-space: nowrap;
}

.certification-document-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(210px, 1fr));
  gap: 14px;
}

.cert-document-card {
  min-height: 308px;
  overflow: hidden;
  border: 1px solid rgba(9, 47, 45, 0.12);
  border-radius: 7px;
  background: #fff;
  box-shadow: 0 13px 28px rgba(9, 47, 45, 0.08);
}

.cert-document-media {
  height: 200px;
  display: grid;
  place-items: center;
  background: #f7f4eb;
  border-bottom: 1px solid rgba(9, 47, 45, 0.08);
}

.cert-document-media img {
  width: 100%;
  height: 100%;
  display: block;
  object-fit: contain;
  object-position: center top;
}

.cert-document-mark {
  width: 74%;
  min-height: 126px;
  display: grid;
  place-items: center;
  text-align: center;
  border: 1px solid rgba(9, 47, 45, 0.14);
  background: #fff;
  color: var(--store-primary-dark);
  box-shadow: 0 10px 24px rgba(9, 47, 45, 0.08);
}

.cert-document-mark strong {
  color: var(--store-accent-2);
  font-size: 1.4rem;
}

.cert-document-mark span {
  padding: 0 10px;
  font-size: 0.76rem;
  font-weight: 800;
}

.cert-document-copy {
  padding: 14px;
}

.cert-document-type {
  color: var(--store-accent-2);
  font-size: 0.72rem;
  font-weight: 900;
  letter-spacing: 0.04em;
  text-transform: uppercase;
}

.cert-document-copy h3 {
  margin: 6px 0;
  color: var(--store-primary-dark);
  font-size: 1rem;
}

.cert-document-copy p {
  display: -webkit-box;
  margin: 0;
  overflow: hidden;
  color: var(--store-muted);
  font-size: 0.82rem;
  line-height: 1.45;
  -webkit-box-orient: vertical;
  -webkit-line-clamp: 2;
}

@media (max-width: 760px) {
  .certification-category-nav { top: 104px; }
  .certification-group { scroll-margin-top: 182px; }
}

@media (max-width: 640px) {
  .certification-category-nav {
    gap: 8px;
    margin: 6px -12px 16px;
    padding: 10px 12px;
  }

  .certification-category-nav::-webkit-scrollbar { display: none; }
  .cert-nav-link { min-width: 136px; }
  .certification-directory { padding: 20px; }
  .certification-document-grid { grid-template-columns: 1fr; }
}


/* DN Power visual refinement */
:root {
  --store-primary: #17665f;
  --store-primary-dark: #0c302e;
  --store-accent: #c4a15c;
  --store-accent-2: #9b6c2d;
  --store-ink: #172928;
  --store-muted: #657572;
  --store-border: #d8e0dc;
  --store-bg: #f3f6f3;
  --store-surface: #ffffff;
  --store-soft: #e9f0ec;
  --store-warm: #f6f1e7;
}

body {
  background: var(--store-bg);
  background-image: linear-gradient(180deg, #fafbf9 0%, #f3f6f3 58%, #eef3f0 100%);
}

a:hover { color: var(--store-primary); }

.store-header {
  background: rgba(253, 254, 252, 0.92);
  border-bottom-color: rgba(12, 48, 46, 0.1);
  box-shadow: 0 8px 24px rgba(12, 48, 46, 0.07);
}

.store-logo span,
.store-kicker,
.cert-document-type,
.certification-group-heading span,
.cert-nav-link strong {
  color: var(--store-accent-2);
}

.store-nav a:not(.store-cart-badge) {
  color: #3d4f4c;
  position: relative;
}

.store-nav a:not(.store-cart-badge)::after {
  background: var(--store-accent);
  bottom: -3px;
  content: "";
  height: 2px;
  left: 0;
  position: absolute;
  transform: scaleX(0);
  transform-origin: left;
  transition: transform 160ms ease;
  width: 100%;
}

.store-nav a:not(.store-cart-badge):hover::after,
.store-nav a[aria-current="page"]::after {
  transform: scaleX(1);
}

.store-cart-badge,
.lang-switch button.active {
  background: var(--store-primary-dark);
}

.energy-hero {
  background: #0c302e;
  border: 1px solid rgba(196, 161, 92, 0.28);
  box-shadow: 0 24px 50px rgba(12, 48, 46, 0.16);
}

.hero-product {
  background: rgba(255, 255, 255, 0.055);
  border-color: rgba(255, 255, 255, 0.15);
}

.hero-product img,
.store-card img,
.section-image,
.contact-panel img {
  background: #ffffff;
}

.store-hero .store-btn-primary {
  background: var(--store-accent);
  color: #132523;
}

.store-hero .store-btn-primary:hover {
  background: #d1b271;
  color: #132523;
}

.store-hero .store-btn-secondary {
  background: transparent;
  border-color: rgba(255, 255, 255, 0.4);
  color: #fff;
}

.page-heading,
.section-heading {
  background: transparent;
}

.page-heading.catalog-heading,
.certification-directory,
.company-profile,
.contact-panel,
.store-note-panel,
.store-form,
.store-feature,
.store-card,
.cert-document-card {
  border-color: rgba(12, 48, 46, 0.1);
  box-shadow: 0 10px 28px rgba(12, 48, 46, 0.055);
}

.page-heading.catalog-heading {
  background: #fbfcfa;
}

.store-feature,
.store-card,
.cert-document-card {
  background: #ffffff;
}

.store-feature:hover,
.store-card:hover,
.cert-document-card:hover {
  border-color: rgba(23, 102, 95, 0.22);
  box-shadow: 0 16px 34px rgba(12, 48, 46, 0.09);
}

.company-proof-grid article,
.product-parameters {
  background: #f3f7f4;
  border-color: rgba(12, 48, 46, 0.08);
}

.store-filter-strip span,
.product-meta span {
  background: var(--store-warm);
  border-color: rgba(155, 108, 45, 0.16);
  color: var(--store-primary-dark);
}

.product-category-nav,
.certification-category-nav {
  background: rgba(243, 246, 243, 0.96);
  border-bottom-color: rgba(12, 48, 46, 0.08);
}

.product-nav-link,
.cert-nav-link {
  border-color: rgba(12, 48, 46, 0.11);
  box-shadow: 0 6px 16px rgba(12, 48, 46, 0.045);
}

.product-nav-link:hover,
.product-nav-link.active,
.cert-nav-link:hover,
.cert-nav-link.active {
  border-color: rgba(196, 161, 92, 0.78);
  background: #fffefb;
  box-shadow: 0 10px 22px rgba(12, 48, 46, 0.08);
}

.store-btn-primary,
.store-card .store-btn {
  background: var(--store-primary);
  box-shadow: 0 8px 18px rgba(23, 102, 95, 0.18);
}

.store-btn-primary:hover,
.store-card .store-btn:hover {
  background: var(--store-primary-dark);
  color: #fff;
}

.store-btn-secondary {
  background: #fff;
  border-color: rgba(12, 48, 46, 0.18);
}

.certification-directory {
  background: rgba(255, 255, 255, 0.84);
}

.cert-document-media {
  background: #f6f8f6;
  border-bottom-color: rgba(12, 48, 46, 0.08);
}

.certification-heading::after {
  background: var(--store-accent);
}

.store-footer {
  border-top: 1px solid rgba(12, 48, 46, 0.08);
  color: #71817e;
}

@media (max-width: 640px) {
  .store-nav a:not(.store-cart-badge)::after { display: none; }
  .energy-hero { box-shadow: 0 16px 34px rgba(12, 48, 46, 0.15); }
}