:root {
  --orange: #ed7020;
  --orange-hover: #d95e12;
  --heading: #333333;
  --text: #666666;
  --soft-text: #8b8b8b;
  --black: #000000;
  --white: #ffffff;
  --page: #f4f4f4;
  --surface: #f0f0f0;
  --surface-alt: #f1f1f1;
  --footer: #eeeeee;
  --border: #dddddd;
  --border-soft: #e8e8e8;
  --radius-control: 10px;
  --radius-card: 16px;
  --radius-visual: 20px;
  --radius-pill: 999px;
  --shadow-lift: 0 14px 36px rgba(51, 51, 51, .08);
  --container: 1200px;
  --text-container: 820px;
  --font: Arial, "PingFang SC", "Microsoft YaHei", "Noto Sans SC", sans-serif;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; scroll-padding-top: 136px; }
body {
  margin: 0;
  color: var(--text);
  background: var(--page);
  font-family: var(--font);
  font-size: 16px;
  line-height: 1.7;
  overflow-wrap: break-word;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}
img { display: block; max-width: 100%; }
a { color: inherit; text-decoration: none; }
button, input, select, textarea { font: inherit; }
button { cursor: pointer; }

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

.skip-link {
  position: fixed;
  z-index: 1000;
  top: 8px;
  left: 8px;
  padding: 8px 14px;
  color: var(--white);
  background: var(--orange);
  transform: translateY(-160%);
}
.skip-link:focus { transform: translateY(0); }
:focus-visible { outline: 3px solid var(--orange); outline-offset: 3px; }

.site-header {
  position: sticky;
  z-index: 100;
  top: 0;
  background: var(--white);
}
.topbar {
  height: 38px;
  color: #a0a0a0;
  border-bottom: 1px solid #f0f0f0;
  background: var(--white);
  font-size: 13px;
}
.topbar__inner {
  width: min(var(--container), calc(100% - 64px));
  height: 100%;
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
}
.site-nav { height: 98px; color: var(--heading); background: var(--white); }
.nav-inner {
  width: min(var(--container), calc(100% - 64px));
  height: 100%;
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: clamp(48px, 7vw, 92px);
}
.brand { flex: 0 0 auto; }
.brand img { width: 180px; height: 44px; object-fit: contain; }
.nav-links { height: 100%; display: flex; align-items: center; gap: 28px; font-size: 16px; }
.nav-links > a {
  position: relative;
  height: 100%;
  display: flex;
  align-items: center;
  color: var(--heading);
  white-space: nowrap;
}
.nav-links > a::after {
  content: "";
  position: absolute;
  right: 50%;
  bottom: 19px;
  left: 50%;
  height: 2px;
  background: var(--orange);
  transition: right .2s ease, left .2s ease;
}
.nav-links > a:hover,
.nav-links > a[aria-current="page"] { color: var(--orange); }
.nav-links > a:hover::after,
.nav-links > a[aria-current="page"]::after { right: 18%; left: 18%; }
.nav-search-toggle {
  width: 40px;
  height: 40px;
  padding: 0;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border: 1px solid transparent;
  border-radius: 50%;
  color: var(--heading);
  background: transparent;
  transition: color .2s ease, border-color .2s ease;
}
.nav-search-toggle:hover,
.nav-search-toggle[aria-expanded="true"] { color: var(--orange); border-color: var(--orange); }
.nav-search-toggle svg,
.product-search__bar svg { width: 20px; height: 20px; fill: none; stroke: currentColor; stroke-linecap: round; stroke-width: 1.8; }
.nav-toggle {
  display: none;
  width: 44px;
  height: 44px;
  margin-left: auto;
  border: 0;
  color: var(--heading);
  background: transparent;
}
.nav-toggle span,
.nav-toggle::before,
.nav-toggle::after {
  content: "";
  display: block;
  width: 22px;
  height: 1px;
  margin: 5px auto;
  background: currentColor;
  transition: transform .25s ease, opacity .25s ease;
}
.nav-toggle.is-open span { opacity: 0; }
.nav-toggle.is-open::before { transform: translateY(6px) rotate(45deg); }
.nav-toggle.is-open::after { transform: translateY(-6px) rotate(-45deg); }

.search-is-open { overflow: hidden; }
.product-search {
  position: fixed;
  z-index: 99;
  inset: 136px 0 0;
  padding: 28px 24px;
  background: rgba(0,0,0,.42);
}
.product-search[hidden],
.product-search__item[hidden],
.product-search__empty[hidden] { display: none; }
.product-search__panel {
  width: min(760px, 100%);
  max-height: min(680px, calc(100vh - 190px));
  margin: 0 auto;
  overflow: hidden;
  border: 1px solid var(--border);
  border-radius: var(--radius-card);
  background: var(--white);
  box-shadow: 0 24px 64px rgba(0, 0, 0, .16);
}
.product-search__bar {
  min-height: 64px;
  padding: 0 18px 0 22px;
  display: grid;
  grid-template-columns: auto minmax(0, 1fr) auto;
  align-items: center;
  gap: 14px;
  border-bottom: 1px solid var(--border);
  color: var(--soft-text);
}
.product-search__input {
  width: 100%;
  min-width: 0;
  height: 54px;
  border: 0;
  outline: 0;
  color: var(--heading);
  background: transparent;
  font-size: 16px;
}
.product-search__input::placeholder { color: #a0a0a0; }
.product-search__close {
  min-height: 40px;
  padding: 0 12px;
  border: 0;
  color: var(--orange);
  background: transparent;
}
.product-search__close:hover { background: var(--surface); }
.product-search__results { max-height: min(590px, calc(100vh - 255px)); padding: 10px; overflow-y: auto; }
.product-search__item {
  min-height: 52px;
  padding: 10px 14px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  border-bottom: 1px solid var(--border-soft);
  border-radius: var(--radius-control);
}
.product-search__item:hover { color: var(--orange); background: var(--page); }
.product-search__item span { color: var(--heading); font-weight: 500; }
.product-search__item:hover span { color: var(--orange); }
.product-search__item small { color: var(--soft-text); font-size: 13px; }
.product-search__empty { margin: 0; padding: 34px 14px; color: var(--text); text-align: center; }

.container { width: min(var(--container), calc(100% - 64px)); margin: 0 auto; }
.section { padding: 72px 0; background: var(--white); }
.section--light { background: var(--surface); }
.section--dark { color: var(--white); background: var(--heading); }
.catalog-page { min-height: calc(100vh - 136px); padding-top: 42px; }
.section-heading { max-width: var(--text-container); margin: 0 auto 48px; text-align: center; }
.section-heading::after {
  content: "";
  width: 50px;
  height: 3px;
  margin: 24px auto 0;
  display: block;
  background: var(--orange);
}
.section-heading__title-row { display: flex; align-items: center; justify-content: center; gap: 22px; }
.section-heading__title-row .btn { flex: 0 0 auto; }
.eyebrow {
  margin: 0 0 10px;
  color: var(--orange);
  font-size: 13px;
  font-weight: 500;
  letter-spacing: .08em;
  text-transform: uppercase;
}
.section--dark .eyebrow { color: var(--orange); }
h1, h2, h3 { margin: 0; color: var(--heading); font-weight: 500; letter-spacing: 0; text-wrap: balance; }
h1 { font-size: clamp(42px, 4.3vw, 58px); line-height: 1.18; }
h2 { font-size: clamp(36px, 3.8vw, 48px); line-height: 1.25; }
h3 { font-size: 24px; line-height: 1.35; }
.section--dark h1,
.section--dark h2,
.section--dark h3 { color: var(--white); }
.lead { max-width: 760px; margin: 16px auto 0; color: var(--text); font-size: 18px; line-height: 1.8; text-wrap: pretty; }
.section--dark .lead { color: rgba(255,255,255,.72); }

.btn-row { display: flex; flex-wrap: wrap; align-items: center; gap: 12px; }
.btn {
  min-height: 44px;
  padding: 0 24px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border: 1px solid transparent;
  border-radius: var(--radius-control);
  font-size: 15px;
  line-height: 1.2;
  transition: color .2s ease, background-color .2s ease, border-color .2s ease;
}
.btn--primary,
.btn--dark { color: var(--white); background: var(--orange); }
.btn--primary:hover,
.btn--dark:hover { background: var(--orange-hover); }
.btn--outline { color: var(--orange); border-color: var(--orange); background: transparent; }
.btn--outline:hover { color: var(--white); background: var(--orange); }
.section--dark .btn--outline { color: var(--white); border-color: var(--white); }
.text-link { color: var(--orange); font-weight: 400; }
.text-link:hover { text-decoration: underline; }
.section--dark .text-link { color: #ff9c5d; }

.category-showcase { min-height: calc(100vh - 136px); padding: 42px 0 72px; }
.category-grid { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 22px; }
.category-card {
  min-width: 0;
  overflow: hidden;
  border: 1px solid var(--border);
  border-radius: var(--radius-card);
  color: var(--heading);
  background: var(--white);
  transition: border-color .2s ease, box-shadow .2s ease, transform .2s ease;
}
.category-card:hover { border-color: var(--orange); box-shadow: var(--shadow-lift); transform: translateY(-3px); }
.category-card:focus-visible { outline-offset: 4px; }
.category-card__visual {
  height: 260px;
  padding: 24px;
  display: grid;
  place-items: center;
  overflow: hidden;
  background-color: #f3f6f8;
  background-position: center 60%;
  background-size: cover;
}
.category-card--v1 .category-card__visual { background-image: url("../images/backgrounds/poster-lightfield-t19c-v2.png"); }
.category-card--v2 .category-card__visual { background-image: url("../images/backgrounds/poster-lightfield-gt732b-v2.png"); }
.category-card--v3 .category-card__visual { background-image: url("../images/backgrounds/poster-lightfield-n12l-v2.png"); }
.category-card--v4 .category-card__visual { background-image: url("../images/backgrounds/poster-lightfield-t87-v2.png"); }
.category-card--v5 .category-card__visual { background-image: url("../images/backgrounds/poster-lightfield-gx3-v2.png"); }
.category-card--v6 .category-card__visual { background-image: url("../images/backgrounds/poster-lightfield-gi06-v2.png"); }
.category-card__visual img {
  width: 100%;
  height: 100%;
  object-fit: contain;
  filter: drop-shadow(8px 12px 14px rgba(35,45,55,.14));
  transition: transform .35s ease;
}
.category-card:hover .category-card__visual img { transform: scale(1.025); }
.category-card__placeholder { display: grid; justify-items: center; gap: 8px; color: var(--orange); }
.category-card__placeholder svg { width: 112px; height: 112px; fill: none; stroke: currentColor; stroke-linecap: round; stroke-linejoin: round; stroke-width: 2; }
.category-card__placeholder span { font-size: 14px; letter-spacing: .06em; }
.category-card__content {
  min-height: 76px;
  padding: 18px 22px;
  display: flex;
  align-items: center;
  border-top: 1px solid var(--border-soft);
}
.category-card__content h2 { margin: 0; font-size: 26px; line-height: 1.3; }

.catalog-layout {
  display: grid;
  grid-template-columns: 188px minmax(0, 1fr);
  align-items: start;
  gap: 32px;
}
.catalog-sidebar {
  min-width: 0;
  align-self: start;
}
.catalog-results__heading span {
  display: block;
  margin-bottom: 4px;
  color: var(--orange);
  font-size: 11px;
  line-height: 1.2;
  letter-spacing: .12em;
}
.catalog-results__heading h2 { margin: 0; color: var(--heading); font-size: 20px; line-height: 1.35; font-weight: 500; }
.filters {
  scroll-margin-top: 154px;
  margin: 0;
  display: flex;
  flex-direction: column;
  align-items: stretch;
  gap: 8px;
}
.filter-btn {
  width: 100%;
  min-height: 44px;
  padding: 8px 18px;
  text-align: left;
  border: 1px solid var(--border);
  border-radius: var(--radius-pill);
  color: var(--text);
  background: var(--white);
  transition: color .2s ease, border-color .2s ease, background-color .2s ease;
}
.filter-cluster { display: grid; gap: 6px; }
.filter-submenu { padding: 2px 0 4px 14px; display: grid; gap: 5px; }
.filter-submenu[hidden] { display: none; }
.subfilter-btn {
  min-height: 38px;
  padding: 7px 13px;
  border: 0;
  border-left: 2px solid var(--border);
  color: var(--soft-text);
  background: transparent;
  text-align: left;
  font-size: 14px;
  transition: color .2s ease, border-color .2s ease, background-color .2s ease;
}
.subfilter-btn:hover,
.subfilter-btn.is-active { border-left-color: var(--orange); color: var(--orange); background: rgba(255,255,255,.7); }
.filter-btn:hover,
.filter-btn.is-active { color: var(--white); border-color: var(--orange); background: var(--orange); }
.catalog-results { min-width: 0; }
.catalog-results__toolbar {
  min-height: 54px;
  margin-bottom: 16px;
  padding-bottom: 12px;
  display: flex;
  align-items: center;
  justify-content: flex-start;
  gap: 20px;
  border-bottom: 1px solid var(--border);
}
.catalog-results__heading h2 { font-size: 22px; }
.product-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 22px;
}
.product-grid:focus-visible { outline: 3px solid rgba(237,112,32,.26); outline-offset: 8px; }
.product-card {
  min-width: 0;
  overflow: hidden;
  border: 1px solid var(--border);
  border-radius: var(--radius-card);
  background: var(--white);
  transition: border-color .2s ease, box-shadow .2s ease, transform .2s ease;
}
.product-card:hover { border-color: var(--orange); box-shadow: var(--shadow-lift); transform: translateY(-2px); }
.product-card[hidden] { display: none; }
.product-card__link {
  min-height: 100%;
  display: flex;
  flex-direction: column;
  color: var(--heading);
}
.product-card__link:focus-visible { outline: 3px solid rgba(237,112,32,.28); outline-offset: -4px; }
.product-card__visual {
  height: 250px;
  min-width: 0;
  min-height: 0;
  padding: 22px 24px 16px;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  grid-template-rows: minmax(0, 1fr);
  place-items: center;
  overflow: hidden;
  background-color: #f3f6f8;
  background-position: center 60%;
  background-size: cover;
}
.product-card__visual--v1 { background-image: url("../images/backgrounds/poster-lightfield-t19c-v2.png"); }
.product-card__visual--v2 { background-image: url("../images/backgrounds/poster-lightfield-gt732b-v2.png"); }
.product-card__visual--v3 { background-image: url("../images/backgrounds/poster-lightfield-gx3-v2.png"); }
.product-card__visual--v4 { background-image: url("../images/backgrounds/poster-lightfield-t87-v2.png"); }
.product-card__visual--v5 { background-image: url("../images/backgrounds/poster-lightfield-n12l-v2.png"); }
.product-card__visual--v6 { background-image: url("../images/backgrounds/poster-lightfield-gi06-v2.png"); }
.product-card__visual img {
  min-width: 0;
  min-height: 0;
  width: 100%;
  height: 100%;
  max-width: 100%;
  max-height: 100%;
  object-fit: contain;
  filter: drop-shadow(8px 12px 14px rgba(35,45,55,.14));
  transition: transform .4s ease;
}
.product-card:hover .product-card__visual img { transform: scale(1.025); }
.product-card__label {
  min-height: 62px;
  padding: 12px 22px;
  display: flex;
  align-items: center;
  border-top: 1px solid var(--border-soft);
  background: rgba(255,255,255,.96);
}
.product-card__label h3 { margin: 0; font-size: 22px; line-height: 1.3; font-weight: 500; }
.catalog-pagination {
  min-height: 48px;
  width: auto;
  margin: 28px auto 0;
  padding: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 20px;
}
.catalog-pagination[hidden] { display: none; }
.catalog-pagination__status {
  min-width: 164px;
  margin: 0;
  color: var(--soft-text);
  text-align: center;
  font-size: 13px;
  letter-spacing: .01em;
}
.catalog-pagination__button {
  width: 42px;
  height: 42px;
  display: grid;
  place-items: center;
  border: 1px solid var(--border);
  border-radius: 50%;
  color: var(--heading);
  background: rgba(255,255,255,.42);
  font-size: 24px;
  line-height: 1;
  transition: color .2s ease, border-color .2s ease, background-color .2s ease, transform .2s ease;
}
.catalog-pagination__button:hover:not(:disabled) {
  color: var(--white);
  border-color: var(--orange);
  background: var(--orange);
  transform: translateY(-1px);
}
.catalog-pagination__button:disabled {
  color: #b9b9b9;
  border-color: #e5e5e5;
  background: transparent;
  cursor: not-allowed;
}
.catalog-empty {
  margin: 0 0 32px;
  padding: 64px 24px;
  border: 1px dashed #cfcfcf;
  border-radius: var(--radius-card);
  color: var(--heading);
  background: rgba(255,255,255,.62);
  text-align: center;
  font-size: 20px;
}
.catalog-empty[hidden] { display: none; }

.product-context-bar {
  position: sticky;
  z-index: 80;
  top: 136px;
  border-top: 1px solid var(--border-soft);
  border-bottom: 1px solid var(--border);
  background: rgba(255,255,255,.96);
  backdrop-filter: blur(10px);
}
.product-context-bar__inner {
  min-height: 50px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  color: var(--soft-text);
  font-size: 14px;
}
.product-context-bar__inner span { color: var(--heading); font-weight: 500; }
.product-context-bar__inner a {
  min-height: 44px;
  display: inline-flex;
  align-items: center;
  color: var(--orange);
}
.product-context-bar__inner a:hover { text-decoration: underline; }
.product-context-bar + main #specs { scroll-margin-top: 202px; }

.product-hero {
  min-height: 650px;
  padding: 76px 0;
  display: flex;
  align-items: center;
  overflow: hidden;
  border-top: 4px solid var(--orange);
  background: var(--white);
}
.product-hero--dark { color: var(--text); background: var(--white); }
.product-hero__grid { display: grid; grid-template-columns: .88fr 1.12fr; align-items: center; gap: 68px; }
.breadcrumbs { margin-bottom: 26px; color: var(--soft-text); font-size: 14px; }
.breadcrumbs a:hover { color: var(--orange); }
.product-hero--dark .breadcrumbs { color: var(--soft-text); }
.product-hero__model { margin: 10px 0 0; color: var(--orange); font-size: 22px; font-weight: 500; }
.product-hero--dark .product-hero__model { color: var(--orange); }
.product-hero__copy .lead { margin-left: 0; max-width: 590px; }
.product-hero__copy .btn-row { margin-top: 28px; }
.product-hero__visual {
  min-height: 520px;
  padding: 36px;
  display: grid;
  place-items: center;
  border: 1px solid var(--border-soft);
  border-radius: var(--radius-visual);
  background: var(--page);
}
.product-hero__visual img {
  width: 100%;
  max-height: 500px;
  object-fit: contain;
  filter: drop-shadow(18px 24px 28px rgba(0,0,0,.14));
}

.product-visual-placeholder {
  display: grid;
  justify-items: center;
  gap: 12px;
  color: var(--orange);
  text-align: center;
}
.product-visual-placeholder svg {
  width: 112px;
  height: 112px;
  fill: none;
  stroke: currentColor;
  stroke-linecap: round;
  stroke-linejoin: round;
  stroke-width: 2;
}
.product-visual-placeholder span { font-size: 14px; letter-spacing: .06em; }
.product-card__visual .product-visual-placeholder { height: 100%; align-content: center; }
.product-card__visual .product-visual-placeholder svg { width: 88px; height: 88px; }
.product-hero__visual .product-visual-placeholder svg { width: 150px; height: 150px; }

.feature-grid { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 22px; }
.feature-card {
  min-height: 220px;
  padding: 32px;
  border-top: 3px solid var(--orange);
  border-radius: var(--radius-card);
  background: var(--page);
}
.feature-index { display: block; margin-bottom: 18px; color: var(--orange); font-size: 13px; }
.feature-card p { margin: 10px 0 0; color: var(--text); }
.spec-layout { display: grid; grid-template-columns: .82fr 1.18fr; gap: 72px; align-items: start; }
.spec-layout .section-heading { margin: 0; text-align: left; }
.spec-layout .section-heading::after { margin-left: 0; }
.spec-layout--grouped { grid-template-columns: 1fr; gap: 40px; }
.spec-layout--grouped .section-heading { max-width: 760px; margin: 0 auto; text-align: center; }
.spec-layout--grouped .section-heading::after { margin-left: auto; }
.spec-group {
  overflow: hidden;
  border: 1px solid rgba(255,255,255,.18);
  border-radius: var(--radius-card);
  background: rgba(0,0,0,.12);
}
.spec-group summary { list-style: none; }
.spec-group summary::-webkit-details-marker { display: none; }
.spec-group h3 { margin: 0; padding: 19px 22px; border-bottom: 1px solid rgba(255,255,255,.16); color: var(--white); font-size: 19px; font-weight: 500; }
.spec-group .spec-table { border: 0; border-radius: 0; background: transparent; }
.product-specs--grouped { padding: 32px 0 64px; }
.product-specs--grouped .spec-layout--grouped { gap: 20px; }
.product-specs--grouped .section-heading h2 { font-size: 42px; }
.product-specs--grouped .section-heading .lead { margin-top: 8px; font-size: 16px; line-height: 1.6; }
.product-specs--grouped .section-heading::after { margin-top: 14px; }
.product-specs--grouped .spec-zones { width: 100%; display: grid; grid-template-columns: minmax(0, 1.42fr) minmax(0, 1fr); gap: 22px; align-items: stretch; }
.product-specs--grouped .spec-zones--single { grid-template-columns: minmax(0, 820px); justify-content: center; }
.product-specs--grouped .spec-zone { overflow: hidden; border: 1px solid var(--border); border-radius: var(--radius-card); background: var(--white); }
.product-specs--grouped .spec-zone > h3 { margin: 0; padding: 18px 26px 4px; color: var(--heading); font-size: 22px; font-weight: 600; }
.product-specs--grouped .spec-group { border: 0; border-radius: 0; background: transparent; }
.product-specs--grouped .spec-group + .spec-group { border-top: 1px solid var(--border); }
.product-specs--grouped .spec-group h4 { margin: 0; padding: 8px 26px 6px; color: var(--heading); font-size: 17px; font-weight: 500; }
.product-specs--grouped .spec-row { padding: 4px 22px; grid-template-columns: 142px 1fr; gap: 20px; border-bottom-color: var(--border-soft); line-height: 1.4; }
.product-specs--grouped .spec-row dt { color: var(--soft-text); font-size: 14px; }
.product-specs--grouped .spec-row dd { color: var(--heading); font-size: 14px; font-weight: 500; }
.product-specs--grouped .spec-row--highlight dd { color: var(--orange); font-weight: 700; }
.spec-table { overflow: hidden; border: 1px solid rgba(255,255,255,.18); border-radius: var(--radius-card); background: rgba(0,0,0,.12); }
.spec-row { padding: 18px 22px; display: grid; grid-template-columns: 150px 1fr; gap: 24px; border-bottom: 1px solid rgba(255,255,255,.14); }
.spec-row:last-child { border-bottom: 0; }
.spec-row dt { color: rgba(255,255,255,.62); }
.spec-row dd { margin: 0; color: var(--white); }
.source-note { margin-top: 20px; color: rgba(255,255,255,.58); font-size: 13px; }
.source-note a { color: #ff9c5d; }
.scenario-grid { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 22px; }
.scenario-card { min-height: 210px; padding: 32px; border: 1px solid var(--border); border-radius: var(--radius-card); background: var(--white); }
.scenario-card p { margin: 12px 0 0; color: var(--text); }

.product-pager { padding: 28px 0; border-top: 1px solid var(--border); background: var(--surface); }
.product-pager__inner { display: flex; justify-content: space-between; gap: 20px; }
.product-pager__inner--single { justify-content: center; }
.pager-link { max-width: 48%; color: var(--heading); }
.pager-link:hover { color: var(--orange); }
.pager-link span { display: block; color: var(--soft-text); font-size: 12px; }
.pager-link--next { margin-left: auto; text-align: right; }
.pager-link--back { max-width: none; color: var(--orange); }

.site-footer { padding: 58px 0; border-top: 3px solid var(--orange); color: var(--text); background: var(--footer); }
.footer-grid { display: grid; grid-template-columns: 1.15fr .85fr; gap: 64px; }
.site-footer img { width: 190px; }
.site-footer h2 { margin-top: 20px; color: var(--heading); font-size: 24px; }
.site-footer p { max-width: 620px; }
.footer-links { display: flex; flex-direction: column; align-items: flex-end; gap: 10px; }
.footer-links a { color: var(--orange); }

.reveal { opacity: 0; transform: translateY(14px); transition: opacity .55s ease, transform .55s ease; }
.reveal.is-visible { opacity: 1; transform: translateY(0); }

@media (max-width: 980px) {
  .container,
  .topbar__inner,
  .nav-inner { width: min(100% - 40px, var(--container)); }
  .nav-inner { gap: 38px; }
  .nav-links { gap: 20px; }
  .section { padding: 64px 0; }
  .category-grid,
  .product-grid,
  .feature-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .product-hero__grid,
  .spec-layout { grid-template-columns: 1fr; gap: 44px; }
  .product-hero__copy { text-align: center; }
  .product-hero__copy .lead { margin-left: auto; }
  .product-hero__copy .btn-row { justify-content: center; }
  .product-hero__visual { order: -1; }
  .product-hero__visual { width: min(680px, 100%); min-height: 430px; margin: 0 auto; }
  .product-hero__visual img { max-height: 390px; }
  .spec-layout .section-heading { margin: 0 auto; text-align: center; }
  .spec-layout .section-heading::after { margin-left: auto; }
  .scenario-grid { grid-template-columns: 1fr; }
}

@media (max-width: 768px) {
  html { scroll-padding-top: 64px; }
  .topbar { display: none; }
  .spec-group summary { position: relative; cursor: pointer; }
  .spec-group summary::after { content: "+"; position: absolute; top: 50%; right: 20px; color: #ff9c5d; font-size: 24px; line-height: 1; transform: translateY(-50%); }
  .spec-group[open] summary::after { content: "−"; }
  .spec-group h3,
  .spec-group h4 { padding-right: 54px; }
  .product-specs--grouped .spec-zones { grid-template-columns: 1fr; gap: 14px; }
  .product-specs--grouped { padding: 44px 0; }
  .product-specs--grouped .section-heading h2 { font-size: 34px; }
  .product-specs--grouped .spec-zone > h3 { padding: 20px 20px 8px; font-size: 20px; }
  .product-specs--grouped .spec-group h4 { padding: 14px 20px; }
  .product-specs--grouped .spec-row { grid-template-columns: 108px 1fr; gap: 14px; padding: 13px 18px; }
  .site-nav { height: 64px; border-bottom: 1px solid var(--border-soft); }
  .nav-inner { width: min(100% - 28px, var(--container)); justify-content: space-between; gap: 16px; }
  .brand img { width: 142px; height: 34px; }
  .nav-toggle { display: block; }
  .nav-links {
    position: fixed;
    z-index: 110;
    top: 64px;
    right: 0;
    left: 0;
    height: auto;
    padding: 14px 22px 20px;
    display: none;
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    border-top: 1px solid var(--border-soft);
    border-bottom: 3px solid var(--orange);
    background: var(--white);
  }
  .nav-links.is-open { display: flex; }
  .nav-links > a { min-height: 50px; height: auto; padding: 8px 6px; }
  .nav-links > a::after { right: auto; bottom: 0; left: 6px; width: 0; }
  .nav-links > a:hover::after,
  .nav-links > a[aria-current="page"]::after { right: auto; left: 6px; width: 44px; }
  .nav-links .nav-search-toggle {
    width: 100%;
    min-height: 50px;
    padding: 8px 6px;
    justify-content: flex-start;
    border: 0;
    border-radius: var(--radius-control);
  }
  .nav-links .nav-search-toggle::after { content: "搜索产品"; margin-left: 10px; }
  .product-search { inset: 64px 0 0; padding: 14px; }
  .product-search__panel { max-height: calc(100vh - 92px); }
  .product-search__bar { min-height: 60px; padding: 0 12px 0 16px; gap: 10px; }
  .product-search__input { height: 52px; }
  .product-search__results { max-height: calc(100vh - 166px); }
  .product-context-bar { top: 64px; }
  .product-context-bar__inner { min-height: 46px; font-size: 13px; }
  .product-context-bar + main #specs { scroll-margin-top: 126px; }
  .container { width: min(100% - 28px, var(--container)); }
  .section { padding: 56px 0; }
  .catalog-page { min-height: calc(100vh - 64px); padding-top: 24px; }
  .section-heading { margin-bottom: 38px; }
  .section-heading::after { margin-top: 20px; }
  .section-heading__title-row { flex-direction: column; gap: 16px; }
  h1 { font-size: clamp(38px, 11vw, 48px); }
  h2 { font-size: clamp(32px, 9vw, 40px); }
  .lead { font-size: 16px; line-height: 1.75; }
  .category-showcase { min-height: 0; padding: 24px 0 44px; }
  .category-grid { gap: 12px; }
  .category-card__visual { height: clamp(150px, 40vw, 220px); padding: 14px; }
  .category-card__content { min-height: 64px; padding: 14px 16px; }
  .category-card__content h2 { font-size: 20px; }
  .category-card__placeholder svg { width: 82px; height: 82px; }
  .catalog-layout { display: block; }
  .catalog-sidebar {
    margin: 0 -14px 24px;
    padding: 10px 14px 2px;
    background: rgba(240,240,240,.96);
    backdrop-filter: blur(8px);
  }
  .filters {
    margin: 0;
    padding: 0 0 8px;
    flex-direction: row;
    align-items: center;
    gap: 8px;
    overflow-x: auto;
    scroll-margin-top: 80px;
    scrollbar-width: thin;
  }
  .filter-btn { width: auto; flex: 0 0 auto; text-align: center; }
  .filter-cluster { flex: 0 0 auto; display: flex; align-items: center; gap: 8px; }
  .filter-submenu { padding: 0; display: flex; align-items: center; gap: 6px; }
  .subfilter-btn {
    min-height: 40px;
    padding: 7px 14px;
    flex: 0 0 auto;
    border: 1px solid var(--border);
    border-radius: var(--radius-pill);
    background: var(--white);
    text-align: center;
  }
  .subfilter-btn:hover,
  .subfilter-btn.is-active { border-color: var(--orange); background: #fff5ee; }
  .catalog-results__toolbar { min-height: 50px; margin-bottom: 14px; padding-bottom: 10px; gap: 8px; }
  .catalog-results__heading span { display: none; }
  .catalog-results__heading h2 { font-size: 20px; white-space: nowrap; }
  .catalog-pagination { margin-top: 22px; gap: 14px; }
  .catalog-pagination__status { min-width: 142px; font-size: 12px; }
  .catalog-pagination__button { width: 40px; height: 40px; }
  .feature-grid { grid-template-columns: 1fr; }
  .catalog-page .product-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 12px; }
  .product-card__visual { height: clamp(168px, 42vw, 245px); padding: 14px; }
  .product-card__label { min-height: 62px; padding: 12px 16px; }
  .product-card__label h3 { font-size: 19px; }
  .product-hero { min-height: auto; padding: 58px 0; }
  .product-hero__grid { gap: 30px; }
  .product-hero__visual { min-height: 340px; padding: 24px; }
  .product-hero__visual img { max-height: 310px; }
  .spec-row { grid-template-columns: 108px 1fr; gap: 14px; padding: 16px 18px; }
  .footer-grid { grid-template-columns: 1fr; gap: 36px; }
  .footer-links { align-items: flex-start; }
}

@media (max-width: 480px) {
  .category-card__visual { height: 144px; padding: 12px; }
  .category-card__content { min-height: 60px; padding: 12px; }
  .category-card__content h2 { font-size: 18px; }
  .product-card__visual { height: 168px; padding: 12px; }
  .product-card__label { min-height: 60px; padding: 10px 12px; }
  .product-card__label h3 { font-size: 17px; }
  .product-hero__visual { min-height: 310px; padding: 18px; }
  .product-pager__inner { display: grid; grid-template-columns: 1fr; }
  .pager-link { max-width: 100%; }
  .pager-link--next { margin-left: 0; text-align: left; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { scroll-behavior: auto !important; transition-duration: .01ms !important; animation-duration: .01ms !important; }
  .reveal { opacity: 1; transform: none; }
}