.hero-banner {
  position: relative;
  overflow: hidden;
  border-bottom: 1px solid var(--line-2);
  background: var(--hero-bg);
  padding: 18px 0 0;
}
.hero-banner::before {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  background: radial-gradient(circle at top, rgba(255,255,255,0.98), transparent 28%);
}
.hero-banner-frame {
  position: relative;
  overflow: hidden;
  border-radius: 34px 34px 0 0;
  border: 1px solid var(--line);
  border-bottom: 0;
  background: #ffffff;
  box-shadow: var(--shadow-hero);
}
.hero-banner-image {
  width: 100%;
  height: clamp(320px, 45vw, 560px);
  object-fit: cover;
  object-position: center;
  display: block;
}
.hero-banner-overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(to top, rgba(17,17,17,0.10), rgba(17,17,17,0.00) 32%);
  pointer-events: none;
}
.hero-banner-bar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  padding: 18px 4px 0;
  color: var(--text);
}
.hero-banner-title {
  font-size: clamp(24px, 2.8vw, 36px);
  line-height: 1.14;
  letter-spacing: -0.02em;
  font-weight: 600;
  margin: 0;
}
.breadcrumb {
  display: inline-flex;
  flex-wrap: wrap;
  gap: 10px;
  font-size: 12px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--text-4);
  white-space: nowrap;
}

.anchor-nav {
  position: sticky;
  top: var(--header-h);
  z-index: 90;
  border-bottom: 1px solid rgba(0,0,0,0.08);
  background: rgba(247,247,248,0.82);
  backdrop-filter: blur(18px);
}
.anchor-nav .container {
  min-height: var(--anchor-h);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
}
.anchor-current {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  min-width: 0;
}
.anchor-label {
  font-size: 11px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--text-4);
  white-space: nowrap;
}
.anchor-current-title {
  font-size: 14px;
  font-weight: 600;
  color: var(--text);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  max-width: min(42vw, 420px);
}
.anchor-actions {
  display: flex;
  align-items: center;
  gap: 10px;
  flex-shrink: 0;
}
.anchor-toggle {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  min-height: 44px;
  padding: 0 16px;
  border-radius: 999px;
  border: 1px solid var(--line);
  background: rgba(255,255,255,0.82);
  color: var(--text);
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  cursor: pointer;
  transition: all 0.3s ease;
}
.anchor-toggle:hover {
  background: #fff;
  transform: translateY(-1px);
}
.anchor-toggle .caret {
  font-size: 11px;
  letter-spacing: 0;
  color: var(--text-4);
}
.anchor-dropdown {
  position: absolute;
  top: calc(100% + 10px);
  right: 24px;
  width: min(320px, calc(100% - 32px));
  padding: 10px;
  border: 1px solid var(--line);
  border-radius: 24px;
  background: rgba(255,255,255,0.96);
  box-shadow: 0 20px 44px rgba(15,23,42,0.14);
  backdrop-filter: blur(18px);
  opacity: 0;
  visibility: hidden;
  transform: translateY(8px);
  transition: all 0.25s ease;
}
.anchor-nav.open .anchor-dropdown {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}
.anchor-dropdown-list {
  display: grid;
  gap: 8px;
  max-height: min(62vh, 540px);
  overflow-y: auto;
  padding-right: 2px;
}
.anchor-link {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  min-height: 46px;
  padding: 0 14px;
  border-radius: 16px;
  border: 1px solid transparent;
  color: var(--text-3);
  font-size: 13px;
  font-weight: 500;
  white-space: nowrap;
  transition: all 0.25s ease;
}
.anchor-link:hover {
  color: var(--text);
  background: #f6f7f8;
  border-color: var(--line);
}
.anchor-link.active {
  color: #fff;
  background: var(--dark);
  border-color: var(--dark);
}

.detail-top {
  padding: 32px 0 0;
  scroll-margin-top: calc(var(--header-h) + var(--anchor-h) + 32px);
}
.section[id] {
  scroll-margin-top: calc(var(--header-h) + var(--anchor-h) + 32px);
}
.detail-grid {
  display: grid;
  grid-template-columns: 280px minmax(0, 1.02fr) minmax(320px, 0.88fr);
  gap: 24px;
  align-items: start;
}

.sidebar-stack { display: grid; gap: 20px; }
.sidebar-card,
.glass-card,
.feature-card,
.combo-card,
.app-card,
.support-card,
.faq-card,
.related-card,
.spec-item,
.oem-card,
.form-card,
.overview-card,
.cert-card,
.gallery-card,
.product-intro {
  position: sticky;
  top: calc(var(--header-h) + var(--anchor-h) + 24px);
  border: 1px solid var(--line);
  border-radius: 28px;
  background: rgba(255,255,255,0.78);
  box-shadow: var(--shadow);
  backdrop-filter: blur(18px);
  padding: 24px;
}

.card-head {
  display: flex;
  align-items: center;
  gap: 12px;
  color: var(--text);
}
.card-icon, .icon-box {
  width: 44px;
  height: 44px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border-radius: 16px;
  border: 1px solid var(--line);
  background: #f7f7f8;
  color: var(--text);
  flex-shrink: 0;
}
.card-head h3 {
  margin: 0;
  font-size: 18px;
  font-weight: 600;
  letter-spacing: -0.02em;
}

.sidebar-card p,
.gallery-copy p,
.product-intro p,
.section-copy p,
.hot-item p,
.feature-card p,
.combo-card p,
.app-card p,
.support-card p,
.faq-card p,
.related-card p,
.oem-card p,
.overview-card p,
.visual-copy p,
.cert-card p {
  margin: 14px 0 0;
  font-size: 14px;
  line-height: 1.9;
  color: var(--text-3);
}

.sidebar-nav,
.hot-list,
.tag-row,
.cert-badges,
.cert-mini-grid,
.combo-grid,
.faq-grid,
.related-grid,
.support-grid,
.form-grid,
.grid-5,
.grid-4,
.grid-3,
.grid-2,
.spec-grid {
  display: grid;
  gap: 20px;
}

.category-link {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  padding: 14px 16px;
  border-radius: 18px;
  border: 1px solid var(--line);
  background: linear-gradient(180deg, #ffffff, #f3f4f6);
  color: var(--text-2);
  font-size: 14px;
  transition: all 0.3s ease;
}
.category-link:hover,
.category-link.active {
  background: #fff;
  border-color: rgba(0,0,0,0.12);
  color: var(--text);
  transform: translateY(-1px);
  box-shadow: 0 14px 30px rgba(15,23,42,0.08);
}
.category-link.active {
  background: linear-gradient(180deg, #ffffff, #eef1f5);
}

.hot-item {
  display: block;
  border-radius: 20px;
  border: 1px solid var(--line);
  background: linear-gradient(180deg, #ffffff, #f3f4f6);
  padding: 16px;
  transition: all 0.3s ease;
}
.hot-item:hover,
.feature-card:hover,
.combo-card:hover,
.app-card:hover,
.support-card:hover,
.related-card:hover,
.oem-card:hover,
.cert-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-2);
  border-color: rgba(0,0,0,0.12);
}
.hot-item-grid {
  display: flex;
  gap: 16px;
}
.hot-thumb {
  position: relative;
  width: 76px;
  height: 76px;
  flex-shrink: 0;
  overflow: hidden;
  border-radius: 16px;
  border: 1px solid var(--line);
  background: #fff;
}
.hot-thumb img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}
.hot-index {
  position: absolute;
  right: 8px;
  bottom: 8px;
  z-index: 2;
  font-size: 9px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: #fff;
  padding: 4px 7px;
  border-radius: 999px;
  background: rgba(17,17,17,0.45);
  backdrop-filter: blur(6px);
}
.hot-copy h4 {
  margin: 0;
  font-size: 14px;
  line-height: 1.6;
  font-weight: 600;
  color: var(--text);
}
.hot-link,
.inline-link {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  margin-top: 10px;
  font-size: 12px;
  font-weight: 600;
  color: var(--text);
  transition: gap 0.3s ease;
}
.hot-item:hover .hot-link,
.inline-link:hover { gap: 12px; }

.gallery-card {
  padding: 20px;
}
.gallery-main {
  position: relative;
  overflow: hidden;
  border-radius: 24px;
  border: 1px solid var(--line);
  background: #fff;
  aspect-ratio: 1 / 1;
}
.gallery-main::before {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(to top, rgba(17,17,17,0.08), transparent 42%);
  pointer-events: none;
  z-index: 1;
}
.gallery-main img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}
.gallery-controls {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  margin-top: 18px;
}
.gallery-nav {
  display: flex;
  gap: 10px;
}
.gallery-btn {
  width: 42px;
  height: 42px;
  border-radius: 999px;
  border: 1px solid var(--line);
  background: rgba(255,255,255,0.86);
  color: var(--text);
  cursor: pointer;
  transition: all 0.3s ease;
}
.gallery-btn:hover {
  background: #fff;
  transform: translateY(-1px);
}
.gallery-thumbs {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 12px;
  margin-top: 18px;
}
.thumb {
  overflow: hidden;
  border-radius: 16px;
  border: 1px solid var(--line);
  background: rgba(255,255,255,0.8);
  padding: 8px;
  cursor: pointer;
  transition: all 0.3s ease;
}
.thumb.active,
.thumb:hover {
  border-color: rgba(0,0,0,0.16);
  box-shadow: 0 14px 30px rgba(15,23,42,0.08);
  transform: translateY(-2px);
}
.thumb img {
  width: 100%;
  aspect-ratio: 1 / 1;
  object-fit: cover;
  border-radius: 12px;
  border: 1px solid var(--line);
}

.product-intro h1 {
  margin: 0;
  font-size: clamp(30px, 4.2vw, 46px);
  line-height: 1.08;
  letter-spacing: -0.02em;
  font-weight: 600;
  color: var(--text);
}
.tag-row {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 22px;
}
.hero-tag,
.pill,
.tag,
.cert-chip {
  padding: 10px 14px;
  border-radius: 999px;
  font-size: 11px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  border: 1px solid var(--line);
  background: rgba(255,255,255,0.82);
  color: var(--text-2);
}
.product-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  margin-top: 28px;
}
.hero-meta {
  display: grid;
  gap: 10px;
  margin-top: 24px;
  font-size: 14px;
  color: var(--text-4);
}

.grid-5 { grid-template-columns: repeat(5, minmax(0, 1fr)); }
.grid-4 { grid-template-columns: repeat(4, minmax(0, 1fr)); }
.grid-3, .combo-grid, .related-grid { grid-template-columns: repeat(3, minmax(0, 1fr)); }
.grid-2, .support-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
.spec-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
.faq-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
.form-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }

.feature-card h3,
.combo-card h3,
.app-card h3,
.support-card h3,
.faq-card h3,
.related-card h3,
.oem-card h3,
.cert-card h3 {
  margin: 18px 0 0;
  font-size: clamp(20px, 2.2vw, 24px);
  line-height: 1.25;
  letter-spacing: -0.01em;
  font-weight: 600;
  color: var(--text);
}

.overview-card {
  max-width: 920px;
  margin: 0 auto;
  padding: 30px;
}

.spec-item {
  display: grid;
  grid-template-columns: 0.88fr 1.12fr;
  gap: 16px;
  align-items: start;
  padding: 18px 20px;
  background: linear-gradient(180deg, #ffffff, #f5f6f8);
}
.spec-label {
  font-size: 13px;
  font-weight: 600;
  color: var(--text-4);
  letter-spacing: 0.02em;
}
.spec-value {
  font-size: 14px;
  line-height: 1.8;
  color: var(--text);
}

.highlight-row { display: grid; gap: 28px; }
.highlight-item {
  display: grid;
  grid-template-columns: 0.95fr 1.05fr;
  gap: 32px;
  align-items: center;
}
.highlight-item.reverse { grid-template-columns: 1.05fr 0.95fr; }
.highlight-item.reverse .visual-card { order: 2; }
.highlight-item.reverse .visual-copy { order: 1; }
.visual-card {
  border: 1px solid var(--line);
  border-radius: 30px;
  overflow: hidden;
  background: rgba(255,255,255,0.78);
  box-shadow: var(--shadow);
}
.visual-card img {
  width: 100%;
  aspect-ratio: 16 / 10;
  object-fit: cover;
  display: block;
}
.visual-copy { padding: 6px 0; }
.visual-copy h3 {
  margin: 0;
  font-size: clamp(20px, 2.2vw, 24px);
  line-height: 1.25;
  letter-spacing: -0.01em;
  font-weight: 600;
  color: var(--text);
}

.combo-label,
.faq-label,
.related-label {
  display: inline-flex;
  align-items: center;
  padding: 7px 12px;
  border-radius: 999px;
  border: 1px solid var(--line);
  background: rgba(255,255,255,0.70);
  font-size: 10px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--text-4);
}

.app-image,
.related-image {
  position: relative;
  overflow: hidden;
  aspect-ratio: 16 / 10;
  border-radius: 22px;
  border: 1px solid var(--line);
  background: #fff;
}
.app-image::before,
.related-image::before {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(to top, rgba(17,17,17,0.12), transparent 45%);
  z-index: 1;
  pointer-events: none;
}
.app-image img,
.related-image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}

.cert-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 22px;
}
.cert-card {
  background: linear-gradient(180deg, #ffffff, #f5f6f8);
}
.cert-topline {
  height: 3px;
  border-radius: 999px;
  background: linear-gradient(90deg, #2f6ee7, #2fb4e7);
  margin: -24px -24px 20px;
}
.cert-badges {
  grid-template-columns: repeat(5, minmax(0, 1fr));
  gap: 10px;
  margin-top: 22px;
}
.cert-badge {
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 64px;
  border-radius: 18px;
  border: 1px dashed rgba(47,110,231,0.24);
  background: rgba(255,255,255,0.74);
  font-size: 15px;
  font-weight: 700;
  color: #2157c4;
  letter-spacing: 0.06em;
}
.cert-chips {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 18px;
}
.cert-chip {
  color: #4f6f98;
  letter-spacing: 0;
  text-transform: none;
  font-size: 14px;
  font-weight: 600;
  padding: 12px 16px;
  background: #eef3fb;
  border-color: rgba(47,110,231,0.14);
}
.cert-list {
  display: grid;
  gap: 14px;
  margin-top: 22px;
  padding: 0;
  list-style: none;
}
.cert-list li {
  position: relative;
  padding-left: 24px;
  font-size: 14px;
  line-height: 1.8;
  color: var(--text-2);
}
.cert-list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 10px;
  width: 10px;
  height: 10px;
  border-radius: 999px;
  background: linear-gradient(180deg, #2f6ee7, #2fb4e7);
  box-shadow: 0 0 0 4px rgba(47,110,231,0.12);
}
.cert-mini-grid {
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 12px;
  margin-top: 22px;
}
.cert-mini {
  border-radius: 18px;
  border: 1px solid var(--line);
  background: #f3f5f8;
  padding: 16px;
}
.cert-mini h4 {
  margin: 0;
  font-size: 14px;
  line-height: 1.4;
  color: var(--text);
}
.cert-mini p {
  margin-top: 8px;
  font-size: 13px;
  line-height: 1.7;
  color: var(--text-3);
}
.cert-note {
  margin-top: 18px;
  border-radius: 18px;
  border: 1px solid var(--line);
  background: #f3f5f8;
  padding: 18px;
}
.cert-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  margin-top: 24px;
}

.faq-card { background: linear-gradient(180deg, #ffffff, #f5f6f8); }

.form-card {
  position: relative;
  overflow: hidden;
  background: linear-gradient(135deg, #111111, #2a2a2a);
  border: 1px solid rgba(255,255,255,0.10);
  color: #fff;
  box-shadow: var(--shadow-2);
}
.form-card::before {
  content: "";
  position: absolute;
  inset: 0;
  opacity: 0.12;
  background-image: radial-gradient(rgba(255,255,255,0.14) 1px, transparent 1px);
  background-size: 24px 24px;
  mix-blend-mode: overlay;
  pointer-events: none;
}
.form-card-inner {
  position: relative;
  z-index: 1;
}
.form-card h2,
.form-card p { color: #fff; }
.form-card p { color: rgba(255,255,255,0.65); }
.field { display: grid; gap: 10px; }
.field label {
  font-size: 12px;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: rgba(255,255,255,0.62);
}
.field input,
.field textarea {
  width: 100%;
  padding: 14px 16px;
  border-radius: 18px;
  border: 1px solid rgba(255,255,255,0.12);
  background: rgba(255,255,255,0.06);
  color: #fff;
  font: inherit;
  outline: none;
}
.field textarea {
  min-height: 140px;
  resize: vertical;
}
.field input::placeholder,
.field textarea::placeholder { color: rgba(255,255,255,0.42); }
.field.full { grid-column: 1 / -1; }
.privacy-note {
  margin-top: 18px;
  font-size: 13px;
  line-height: 1.8;
  color: rgba(255,255,255,0.52);
}
.form-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
  margin-top: 26px;
}

@media (max-width: 1279px) {
  .detail-grid { grid-template-columns: 280px minmax(0, 1fr); }
  .gallery-wrap,
  .product-intro { grid-column: 2; }
  .product-intro {
    position: static;
    margin-top: -4px;
  }
}

@media (max-width: 1199px) {
  .detail-grid,
  .highlight-item,
  .highlight-item.reverse,
  .cert-grid { grid-template-columns: 1fr; }
  .product-intro,
  .gallery-wrap { grid-column: auto; }
  .product-intro { position: static; }
  .highlight-item.reverse .visual-card,
  .highlight-item.reverse .visual-copy { order: initial; }
  .grid-5 { grid-template-columns: repeat(3, minmax(0, 1fr)); }
  .grid-4,
  .grid-3,
  .combo-grid,
  .related-grid,
  .spec-grid,
  .faq-grid,
  .support-grid,
  .form-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .hero-banner-bar { flex-direction: column; align-items: flex-start; }
  .breadcrumb { white-space: normal; }
}

@media (max-width: 991px) {
  .nav { display: none; }
  .footer-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .anchor-dropdown { right: 16px; width: min(320px, calc(100% - 24px)); }
  :root { --header-h: 74px; }
}

@media (max-width: 767px) {
  .container { width: min(var(--container), calc(100% - 32px)); }
  .site-header .container { padding: 12px 0; }
  .site-header .header-actions .btn { display: none; }
  .anchor-nav .container { align-items: stretch; padding: 10px 0; }
  .anchor-current { min-width: 0; flex: 1; }
  .anchor-current-title { max-width: 100%; }
  .anchor-toggle { min-height: 40px; padding: 0 14px; letter-spacing: 0.08em; }
  .section-pad { padding: 72px 0; }
  .hero-banner-image { height: 260px; }
  .hero-banner-frame { border-radius: 24px 24px 0 0; }
  .product-actions,
  .form-actions,
  .cert-actions { flex-direction: column; }
  .product-actions .btn,
  .form-actions .btn,
  .cert-actions .btn { width: 100%; }
  .thumb-grid,
  .gallery-thumbs,
  .grid-5,
  .grid-4,
  .grid-3,
  .grid-2,
  .combo-grid,
  .spec-grid,
  .faq-grid,
  .related-grid,
  .support-grid,
  .footer-grid,
  .form-grid,
  .cert-badges,
  .cert-mini-grid { grid-template-columns: 1fr; }
  .feature-card,
  .combo-card,
  .app-card,
  .support-card,
  .faq-card,
  .related-card,
  .spec-item,
  .oem-card,
  .form-card,
  .overview-card,
  .cert-card,
  .gallery-card,
  .product-intro,
  .sidebar-card { padding-left: 20px; padding-right: 20px; }
  .spec-item { grid-template-columns: 1fr; }
  .gallery-controls { flex-direction: column; align-items: stretch; }
  .gallery-nav { justify-content: space-between; }
  .anchor-link { font-size: 11px; padding: 9px 12px; }
}