/* ==========================================================================
   catalog.css — 产品中心（研华全系目录浏览器）
   Depends on style.css design tokens. Append-only, scoped under .catx*
   ========================================================================== */

/* ---------- Hero search + quick chips ---------- */
.hero-search {
  position: relative;
  display: flex;
  align-items: center;
  gap: 8px;
  margin-top: 26px;
  max-width: 620px;
  padding: 6px 6px 6px 44px;
  border: 1px solid var(--line-2);
  border-radius: 99px;
  background: rgba(6, 11, 21, 0.72);
  backdrop-filter: blur(10px);
  transition: border-color 0.28s var(--ease), box-shadow 0.28s var(--ease);
}
.hero-search:focus-within {
  border-color: rgba(34, 224, 255, 0.55);
  box-shadow: 0 0 0 4px rgba(34, 224, 255, 0.11), 0 18px 44px -22px rgba(34, 224, 255, 0.5);
}
.hero-search > svg {
  position: absolute;
  left: 17px;
  width: 17px; height: 17px;
  color: var(--txt-3);
  pointer-events: none;
}
.hero-search input {
  flex: 1;
  min-width: 0;
  border: 0;
  background: none;
  color: var(--txt-1);
  font: inherit;
  font-size: 14px;
  padding: 11px 0;
}
.hero-search input::placeholder { color: var(--txt-3); }
.hero-search input:focus { outline: none; }
.hero-search input::-webkit-search-cancel-button { -webkit-appearance: none; }
.hero-search button {
  flex-shrink: 0;
  border: 0;
  border-radius: 99px;
  padding: 11px 22px;
  font: inherit;
  font-size: 13px;
  font-weight: 700;
  color: #03121C;
  background: var(--grad);
  cursor: pointer;
  transition: box-shadow 0.25s var(--ease), transform 0.25s var(--ease);
}
.hero-search button:hover { box-shadow: var(--glow); transform: translateX(1px); }

.hero-chips {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 18px;
}
.hero-chips a {
  font-size: 12.5px;
  color: var(--txt-2);
  text-decoration: none;
  border: 1px solid var(--line-2);
  border-radius: 99px;
  padding: 6px 14px;
  background: rgba(255, 255, 255, 0.028);
  transition: all 0.24s var(--ease);
}
.hero-chips a:hover {
  color: var(--ice);
  border-color: rgba(34, 224, 255, 0.45);
  background: rgba(34, 224, 255, 0.08);
  transform: translateY(-1px);
}
.hero-chips a b { color: var(--cyan); font-family: var(--mono); font-weight: 600; margin-left: 5px; font-size: 11px; }

/* ---------- Shell ---------- */
.cat-scrim { display: none; }
.cat-shell {
  display: grid;
  grid-template-columns: 296px minmax(0, 1fr);
  gap: 34px;
  align-items: start;
}

/* ---------- Sidebar / category tree ---------- */
.cat-side {
  position: sticky;
  top: calc(var(--nav-h) + 18px);
  max-height: calc(100vh - var(--nav-h) - 40px);
  display: flex;
  flex-direction: column;
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  background:
    linear-gradient(180deg, rgba(255, 255, 255, 0.035), rgba(255, 255, 255, 0.012));
  overflow: hidden;
}

.cat-side-head {
  padding: 16px 16px 12px;
  border-bottom: 1px solid var(--line);
  flex-shrink: 0;
}

.cat-side-title {
  font-size: 12px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--txt-3);
  margin: 0 0 10px;
  font-weight: 600;
}

.cat-search {
  position: relative;
  display: flex;
  align-items: center;
}
.cat-search svg {
  position: absolute;
  left: 11px;
  width: 15px;
  height: 15px;
  stroke: var(--txt-3);
  fill: none;
  stroke-width: 2;
  pointer-events: none;
}
.cat-search input {
  width: 100%;
  background: rgba(0, 0, 0, 0.3);
  border: 1px solid var(--line-2);
  border-radius: 10px;
  color: var(--txt-1);
  font: inherit;
  font-size: 13px;
  padding: 9px 30px 9px 33px;
  transition: border-color 0.25s var(--ease), box-shadow 0.25s var(--ease);
}
.cat-search input::placeholder { color: var(--txt-3); }
.cat-search input:focus {
  outline: none;
  border-color: rgba(34, 224, 255, 0.5);
  box-shadow: 0 0 0 3px rgba(34, 224, 255, 0.12);
}
.cat-search-clear {
  position: absolute;
  right: 7px;
  width: 20px; height: 20px;
  border: 0;
  border-radius: 6px;
  background: transparent;
  color: var(--txt-3);
  cursor: pointer;
  display: none;
  line-height: 1;
  font-size: 15px;
}
.cat-search-clear:hover { color: var(--txt-1); background: rgba(255,255,255,.07); }
.cat-search.is-filled .cat-search-clear { display: block; }

.cat-tree {
  overflow-y: auto;
  padding: 8px 8px 14px;
  flex: 1;
  scrollbar-width: thin;
  scrollbar-color: rgba(255,255,255,.14) transparent;
}
.cat-tree::-webkit-scrollbar { width: 7px; }
.cat-tree::-webkit-scrollbar-thumb { background: rgba(255,255,255,.14); border-radius: 99px; }
.cat-tree::-webkit-scrollbar-track { background: transparent; }

.cat-grp {
  margin-top: 10px;
}
.cat-grp:first-child { margin-top: 2px; }
.cat-grp > .cat-grp-name {
  font-size: 10.5px;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--txt-3);
  padding: 8px 10px 5px;
  font-weight: 700;
}

.cat-node { position: relative; }

.cat-link {
  display: flex;
  align-items: center;
  gap: 8px;
  width: 100%;
  text-align: left;
  border: 0;
  background: transparent;
  color: var(--txt-2);
  font: inherit;
  font-size: 13px;
  line-height: 1.35;
  padding: 7px 10px;
  border-radius: 9px;
  cursor: pointer;
  transition: background 0.18s var(--ease), color 0.18s var(--ease);
}
.cat-link:hover { background: rgba(255, 255, 255, 0.055); color: var(--txt-1); }
.cat-link .cat-n {
  font-style: normal;
  font-size: 10px;
  font-family: var(--mono);
  color: var(--txt-3);
  margin-left: auto;
  flex-shrink: 0;
  padding-left: 6px;
}
.cat-link.is-active {
  background: linear-gradient(90deg, rgba(34, 224, 255, 0.17), rgba(59, 123, 255, 0.07));
  color: var(--ice);
  box-shadow: inset 2px 0 0 var(--cyan);
}
.cat-link.is-active .cat-n { color: var(--cyan); }

/* collapsed children */
.cat-kids {
  margin-left: 9px;
  padding-left: 9px;
  border-left: 1px solid var(--line);
  overflow: hidden;
  max-height: 0;
  transition: max-height 0.34s var(--ease);
}
.cat-node.is-open > .cat-kids { max-height: 3000px; }
.cat-kids .cat-link { font-size: 12.5px; padding: 6px 9px; }

.cat-caret {
  width: 12px; height: 12px;
  flex-shrink: 0;
  stroke: currentColor;
  fill: none;
  stroke-width: 2.4;
  opacity: 0.55;
  transition: transform 0.28s var(--ease);
}
.cat-node.is-open > .cat-link .cat-caret { transform: rotate(90deg); }
.cat-link--leaf .cat-caret { visibility: hidden; }

/* ---------- Main panel ---------- */
.cat-main { min-width: 0; }

.cat-crumb {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 7px;
  font-size: 12px;
  color: var(--txt-3);
  margin-bottom: 16px;
}
.cat-crumb button {
  border: 0; background: none; padding: 0; cursor: pointer;
  color: var(--txt-3); font: inherit; font-size: 12px;
  transition: color 0.2s var(--ease);
}
.cat-crumb button:hover { color: var(--cyan); }
.cat-crumb i { font-style: normal; opacity: 0.5; }
.cat-crumb b { color: var(--txt-2); font-weight: 500; }

/* category header card */
.cat-head {
  position: relative;
  display: grid;
  grid-template-columns: minmax(0, 1fr) 190px;
  gap: 26px;
  align-items: center;
  padding: 26px 28px;
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  background:
    radial-gradient(700px 240px at 88% -40%, rgba(34, 224, 255, 0.12), transparent 70%),
    linear-gradient(180deg, rgba(255, 255, 255, 0.045), rgba(255, 255, 255, 0.012));
  overflow: hidden;
  margin-bottom: 26px;
}
.cat-head h2 {
  margin: 0 0 8px;
  font-size: clamp(21px, 2.1vw, 27px);
  letter-spacing: -0.01em;
  color: var(--txt-1);
}
.cat-head p {
  margin: 0;
  font-size: 13.5px;
  line-height: 1.72;
  color: var(--txt-2);
  max-width: 62ch;
}
.cat-head-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 14px;
}
.cat-chip {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 11.5px;
  font-family: var(--mono);
  color: var(--txt-2);
  border: 1px solid var(--line-2);
  border-radius: 99px;
  padding: 4px 11px;
  background: rgba(0, 0, 0, 0.24);
}
.cat-chip b { color: var(--cyan); font-weight: 600; }
.cat-head-img {
  position: relative;
  aspect-ratio: 1 / 1;
  border-radius: var(--radius);
  border: 1px solid var(--line);
  background:
    radial-gradient(circle at 50% 42%, rgba(34, 224, 255, 0.16), transparent 66%),
    var(--bg-2);
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
  padding: 12px;
}
.cat-head-img img {
  max-width: 100%;
  max-height: 100%;
  object-fit: contain;
  background: linear-gradient(165deg, #FBFDFF 0%, #E9EFF8 100%);
  border-radius: 10px;
  padding: 8px;
  box-shadow: 0 10px 22px -10px rgba(0, 0, 0, 0.55);
}
.cat-head-img svg { width: 44px; height: 44px; stroke: var(--cyan); fill: none; stroke-width: 1.5; opacity: .85; }

/* ---------- Catalogs (型录) ---------- */
.cat-block-title {
  display: flex;
  align-items: baseline;
  gap: 12px;
  margin: 0 0 14px;
  font-size: 15px;
  color: var(--txt-1);
  font-weight: 600;
}
.cat-block-title::after {
  content: "";
  flex: 1;
  height: 1px;
  background: linear-gradient(90deg, var(--line-2), transparent);
}
.cat-block-title span { font-size: 11px; color: var(--txt-3); font-weight: 400; font-family: var(--mono); }

.cat-catalogs {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(238px, 1fr));
  gap: 12px;
  margin-bottom: 30px;
}
.cat-catalog {
  display: flex;
  gap: 12px;
  align-items: center;
  padding: 11px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: rgba(255, 255, 255, 0.028);
  text-decoration: none;
  transition: border-color 0.25s var(--ease), background 0.25s var(--ease), transform 0.25s var(--ease);
}
.cat-catalog:hover {
  border-color: rgba(34, 224, 255, 0.4);
  background: rgba(34, 224, 255, 0.06);
  transform: translateY(-2px);
}
.cat-catalog-thumb {
  width: 46px; height: 60px;
  flex-shrink: 0;
  border-radius: 6px;
  overflow: hidden;
  background: var(--bg-3);
  border: 1px solid var(--line);
  display: flex; align-items: center; justify-content: center;
}
.cat-catalog-thumb img { width: 100%; height: 100%; object-fit: cover; }
.cat-catalog-thumb span { font-size: 18px; }
.cat-catalog-txt { min-width: 0; }
.cat-catalog-txt b {
  display: block;
  font-size: 13px;
  font-weight: 600;
  color: var(--txt-1);
  line-height: 1.4;
  margin-bottom: 3px;
}
.cat-catalog-txt i {
  font-style: normal;
  font-size: 11px;
  color: var(--txt-3);
  font-family: var(--mono);
}

/* ---------- Sub-category cards (browse mode) ---------- */
.cat-subgrid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
  gap: 14px;
}
.cat-subcard {
  position: relative;
  display: flex;
  flex-direction: column;
  gap: 10px;
  padding: 16px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: linear-gradient(180deg, rgba(255, 255, 255, 0.04), rgba(255, 255, 255, 0.012));
  cursor: pointer;
  text-align: left;
  font: inherit;
  color: inherit;
  transition: border-color 0.28s var(--ease), transform 0.28s var(--ease), box-shadow 0.28s var(--ease);
  overflow: hidden;
}
.cat-subcard::before {
  content: "";
  position: absolute;
  inset: 0;
  background: radial-gradient(360px 140px at var(--mx, 50%) var(--my, 0%), rgba(34, 224, 255, 0.13), transparent 70%);
  opacity: 0;
  transition: opacity 0.35s var(--ease);
  pointer-events: none;
}
.cat-subcard:hover {
  border-color: rgba(34, 224, 255, 0.42);
  transform: translateY(-3px);
  box-shadow: 0 22px 46px -26px rgba(34, 224, 255, 0.55);
}
.cat-subcard:hover::before { opacity: 1; }
.cat-subcard-top {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
}
.cat-subcard h4 {
  margin: 0;
  font-size: 14.5px;
  font-weight: 600;
  color: var(--txt-1);
  line-height: 1.4;
}
.cat-subcard-img {
  aspect-ratio: 16 / 9;
  border-radius: 10px;
  border: 1px solid var(--line);
  background: radial-gradient(circle at 50% 45%, rgba(34,224,255,.12), transparent 68%), var(--bg-2);
  display: flex; align-items: center; justify-content: center;
  overflow: hidden;
  padding: 8px;
}
.cat-subcard-img img {
  max-width: 100%;
  max-height: 100%;
  object-fit: contain;
  background: linear-gradient(165deg, #FBFDFF 0%, #E9EFF8 100%);
  border-radius: 8px;
  padding: 6px 10px;
}
.cat-subcard p {
  margin: 0;
  font-size: 12.5px;
  line-height: 1.65;
  color: var(--txt-2);
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}
.cat-subcard-foot {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
  margin-top: auto;
  padding-top: 4px;
}
.cat-subcard-foot .cat-chip { font-size: 11px; }
.cat-subcard-foot .go {
  font-size: 12px;
  color: var(--cyan);
  display: inline-flex;
  align-items: center;
  gap: 4px;
  opacity: 0.85;
}
.cat-subcard:hover .cat-subcard-foot .go { opacity: 1; }

/* ---------- Product cards ---------- */
.cat-toolbar {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 12px;
  margin-bottom: 14px;
}
.cat-toolbar .cat-block-title { flex: 1; margin: 0; min-width: 200px; }
.cat-count {
  font-size: 12px;
  color: var(--txt-3);
  font-family: var(--mono);
  white-space: nowrap;
}

.pd-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(288px, 1fr));
  gap: 16px;
}

.pd-card {
  position: relative;
  display: flex;
  flex-direction: column;
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  background: linear-gradient(180deg, rgba(255, 255, 255, 0.042), rgba(255, 255, 255, 0.012));
  overflow: hidden;
  transition: border-color 0.3s var(--ease), transform 0.3s var(--ease), box-shadow 0.3s var(--ease);
}
.pd-card:hover {
  border-color: rgba(34, 224, 255, 0.36);
  transform: translateY(-4px);
  box-shadow: 0 26px 54px -28px rgba(34, 224, 255, 0.5);
}
.pd-card::before {
  content: "";
  position: absolute;
  inset: 0;
  background: radial-gradient(420px 180px at var(--mx, 50%) var(--my, 0%), rgba(34, 224, 255, 0.1), transparent 70%);
  opacity: 0;
  transition: opacity 0.4s var(--ease);
  pointer-events: none;
  z-index: 0;
}
.pd-card:hover::before { opacity: 1; }

.pd-stage {
  position: relative;
  height: 186px;
  flex-shrink: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 16px;
  background:
    radial-gradient(circle at 50% 46%, rgba(34, 224, 255, 0.15), transparent 68%),
    linear-gradient(180deg, rgba(6, 12, 24, 0.9), rgba(9, 16, 30, 0.5));
  border-bottom: 1px solid var(--line);
  overflow: hidden;
  z-index: 1;
}
.pd-stage::after {
  content: "";
  position: absolute;
  left: 12%; right: 12%; bottom: 0;
  height: 42px;
  background: radial-gradient(ellipse at center, rgba(34, 224, 255, 0.3), transparent 72%);
  filter: blur(11px);
  opacity: 0.6;
}
.pd-stage img {
  position: relative;
  max-width: 86%;
  max-height: 148px;
  object-fit: contain;
  background: linear-gradient(165deg, #FBFDFF 0%, #E9EFF8 100%);
  border-radius: 12px;
  padding: 10px 14px;
  box-shadow: 0 12px 26px -12px rgba(0, 0, 0, 0.55), 0 0 0 1px rgba(255, 255, 255, 0.09);
  transition: transform 0.4s var(--ease), box-shadow 0.4s var(--ease);
  z-index: 1;
}
.pd-card:hover .pd-stage img {
  transform: translateY(-5px) scale(1.025);
  box-shadow: 0 18px 34px -14px rgba(0, 0, 0, 0.6), 0 0 0 1px rgba(34, 224, 255, 0.3);
}
.pd-stage .pd-noimg {
  width: 58px; height: 58px; opacity: 0.3;
}

.pd-status {
  position: absolute;
  top: 11px; left: 11px;
  z-index: 2;
  font-size: 10px;
  font-family: var(--mono);
  letter-spacing: 0.06em;
  padding: 3px 8px;
  border-radius: 99px;
  border: 1px solid rgba(34, 224, 255, 0.34);
  background: rgba(4, 10, 20, 0.72);
  color: var(--cyan);
  backdrop-filter: blur(6px);
}
.pd-status--new { border-color: rgba(126, 255, 168, 0.4); color: #7EFFA8; }

.pd-body {
  position: relative;
  z-index: 1;
  padding: 15px 17px 17px;
  display: flex;
  flex-direction: column;
  flex: 1;
  gap: 9px;
}
.pd-name {
  margin: 0;
  font-family: var(--mono);
  font-size: 15px;
  font-weight: 600;
  letter-spacing: 0.015em;
  color: var(--txt-1);
  word-break: break-word;
}
.pd-desc {
  margin: 0;
  font-size: 12.5px;
  line-height: 1.68;
  color: var(--txt-2);
  display: -webkit-box;
  -webkit-line-clamp: 3;
  -webkit-box-orient: vertical;
  overflow: hidden;
}
.pd-feats {
  list-style: none;
  margin: 2px 0 0;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: 5px;
}
.pd-feats li {
  position: relative;
  padding-left: 14px;
  font-size: 12px;
  line-height: 1.6;
  color: var(--txt-2);
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}
.pd-feats li::before {
  content: "";
  position: absolute;
  left: 2px; top: 7.5px;
  width: 4px; height: 4px;
  border-radius: 50%;
  background: var(--cyan);
  opacity: 0.75;
}
.pd-feats li.is-more { color: var(--txt-3); font-family: var(--mono); font-size: 11px; }
.pd-feats li.is-more::before { background: var(--txt-3); }

.pd-parts {
  display: flex;
  flex-wrap: wrap;
  gap: 5px;
  margin-top: 2px;
}
.pd-part {
  font-family: var(--mono);
  font-size: 10.5px;
  color: var(--txt-2);
  border: 1px solid var(--line-2);
  border-radius: 5px;
  padding: 2px 6px;
  background: rgba(0, 0, 0, 0.26);
}

.pd-actions {
  display: flex;
  gap: 8px;
  margin-top: auto;
  padding-top: 12px;
  border-top: 1px solid var(--line);
}
.pd-btn {
  flex: 1;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  font-size: 12px;
  font-weight: 600;
  text-decoration: none;
  padding: 8px 10px;
  border-radius: 9px;
  border: 1px solid var(--line-2);
  color: var(--txt-2);
  background: rgba(255, 255, 255, 0.03);
  cursor: pointer;
  transition: all 0.24s var(--ease);
  white-space: nowrap;
}
.pd-btn svg { width: 13px; height: 13px; stroke: currentColor; fill: none; stroke-width: 2; flex-shrink: 0; }
.pd-btn:hover { color: var(--txt-1); border-color: var(--line-3); background: rgba(255, 255, 255, 0.07); }
.pd-btn--pri {
  border-color: transparent;
  background: var(--grad-soft);
  color: var(--ice);
  box-shadow: inset 0 0 0 1px rgba(34, 224, 255, 0.28);
}
.pd-btn--pri:hover {
  background: var(--grad);
  color: #03121c;
  box-shadow: var(--glow);
}
.pd-btn.is-disabled { opacity: 0.34; pointer-events: none; }

/* load more */
.cat-more {
  display: flex;
  justify-content: center;
  margin-top: 26px;
}
.cat-more button {
  min-width: 200px;
  padding: 12px 26px;
  border-radius: 99px;
  border: 1px solid var(--line-2);
  background: rgba(255, 255, 255, 0.035);
  color: var(--txt-2);
  font: inherit;
  font-size: 13px;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.25s var(--ease);
}
.cat-more button:hover {
  color: #03121c;
  background: var(--grad);
  border-color: transparent;
  box-shadow: var(--glow);
}

/* empty state */
.cat-empty {
  padding: 56px 20px;
  text-align: center;
  border: 1px dashed var(--line-2);
  border-radius: var(--radius-lg);
  color: var(--txt-3);
  font-size: 13px;
}
.cat-empty b { display: block; color: var(--txt-2); font-size: 15px; margin-bottom: 6px; font-weight: 600; }

/* skeleton */
.pd-skel {
  height: 386px;
  border-radius: var(--radius-lg);
  border: 1px solid var(--line);
  background: linear-gradient(100deg, rgba(255,255,255,.028) 30%, rgba(255,255,255,.07) 50%, rgba(255,255,255,.028) 70%);
  background-size: 220% 100%;
  animation: catShimmer 1.25s var(--ease) infinite;
}
@keyframes catShimmer { from { background-position: 180% 0; } to { background-position: -40% 0; } }

/* search-result highlighting */
mark.cat-hl {
  background: rgba(34, 224, 255, 0.2);
  color: var(--ice);
  border-radius: 3px;
  padding: 0 2px;
}

/* ---------- Mobile filter bar ---------- */
.cat-mobile-bar {
  display: none;
  align-items: center;
  gap: 10px;
  margin-bottom: 16px;
}
.cat-mobile-bar button {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  border: 1px solid var(--line-2);
  background: rgba(255, 255, 255, 0.035);
  color: var(--txt-1);
  font: inherit;
  font-size: 13px;
  font-weight: 600;
  padding: 10px 15px;
  border-radius: 11px;
  cursor: pointer;
}
.cat-mobile-bar button svg { width: 15px; height: 15px; stroke: currentColor; fill: none; stroke-width: 2; }
.cat-mobile-bar .now {
  font-size: 12px;
  color: var(--txt-3);
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

/* ---------- Responsive ---------- */
@media (max-width: 1180px) {
  .cat-shell { grid-template-columns: 258px minmax(0, 1fr); gap: 24px; }
  .cat-head { grid-template-columns: minmax(0, 1fr) 150px; padding: 22px; }
}

@media (max-width: 980px) {
  .cat-shell { grid-template-columns: minmax(0, 1fr); gap: 0; }
  .cat-mobile-bar { display: flex; }
  .cat-side {
    position: fixed;
    top: 0; left: 0; bottom: 0;
    width: min(330px, 88vw);
    max-height: none;
    z-index: 200;
    border-radius: 0;
    border: 0;
    border-right: 1px solid var(--line-2);
    background: linear-gradient(180deg, #080D18, #050910);
    transform: translateX(-102%);
    transition: transform 0.36s var(--ease-out);
    box-shadow: 30px 0 70px -30px rgba(0, 0, 0, 0.8);
  }
  .cat-shell.is-tree-open .cat-side { transform: none; }
  .cat-scrim {
    display: block;
    position: fixed;
    inset: 0;
    background: rgba(3, 6, 12, 0.66);
    backdrop-filter: blur(3px);
    z-index: 199;
    opacity: 0;
    pointer-events: none;
    transition: opacity 0.3s var(--ease);
  }
  .cat-shell.is-tree-open .cat-scrim { opacity: 1; pointer-events: auto; }
  .cat-head { grid-template-columns: minmax(0, 1fr); }
  .cat-head-img { display: none; }
  .pd-grid { grid-template-columns: repeat(auto-fill, minmax(250px, 1fr)); }
}

@media (max-width: 620px) {
  .pd-grid { grid-template-columns: minmax(0, 1fr); }
  .cat-subgrid { grid-template-columns: minmax(0, 1fr); }
  .cat-catalogs { grid-template-columns: minmax(0, 1fr); }
  .cat-head { padding: 18px; }
  .cat-head p { font-size: 13px; }
  .pd-stage { height: 172px; }
}

/* ==========================================================================
   Product detail panel — opens in-page, never leaves the site
   ========================================================================== */
html.pdx-lock { overflow: hidden; }
html.pdx-lock body { overflow: hidden; }

.pdx { position: fixed; inset: 0; z-index: 420; display: none; }
.pdx.is-open { display: block; }

.pdx-scrim {
  position: absolute;
  inset: 0;
  background: rgba(3, 6, 12, 0.74);
  backdrop-filter: blur(7px);
  -webkit-backdrop-filter: blur(7px);
  animation: pdxFade 0.3s var(--ease) both;
}
@keyframes pdxFade { from { opacity: 0; } to { opacity: 1; } }

.pdx-panel {
  position: absolute;
  top: 50%; left: 50%;
  transform: translate(-50%, -50%);
  width: min(1140px, 95vw);
  height: min(89vh, 940px);
  display: flex;
  flex-direction: column;
  border-radius: var(--radius-lg);
  border: 1px solid var(--line-2);
  background: linear-gradient(180deg, #080D18 0%, #05080F 100%);
  box-shadow: 0 44px 130px -44px rgba(0, 0, 0, 0.92), 0 0 0 1px rgba(34, 224, 255, 0.07);
  overflow: hidden;
  animation: pdxIn 0.36s var(--ease-out) both;
}
@keyframes pdxIn {
  from { opacity: 0; transform: translate(-50%, -47%) scale(0.975); }
  to   { opacity: 1; transform: translate(-50%, -50%) scale(1); }
}

.pdx-close {
  position: absolute;
  top: 16px; right: 16px;
  z-index: 6;
  width: 36px; height: 36px;
  display: flex; align-items: center; justify-content: center;
  border-radius: 50%;
  border: 1px solid var(--line-2);
  background: rgba(10, 16, 29, 0.86);
  color: var(--txt-2);
  cursor: pointer;
  transition: all 0.24s var(--ease);
}
.pdx-close:hover { color: var(--txt-1); border-color: var(--line-3); background: rgba(20, 30, 48, 0.96); }
.pdx-close svg { width: 15px; height: 15px; stroke: currentColor; fill: none; stroke-width: 1.8; stroke-linecap: round; }

.pdx-scroll {
  flex: 1;
  overflow-y: auto;
  overscroll-behavior: contain;
  padding: 30px 36px 44px;
}
.pdx-scroll::-webkit-scrollbar { width: 9px; }
.pdx-scroll::-webkit-scrollbar-thumb { background: rgba(255, 255, 255, 0.13); border-radius: 9px; }
.pdx-scroll::-webkit-scrollbar-track { background: transparent; }

/* ---- breadcrumb path ---- */
.pdx-path {
  font-size: 11.5px;
  font-family: var(--mono);
  letter-spacing: 0.02em;
  color: var(--txt-3);
  margin-bottom: 16px;
  padding-right: 46px;
}

/* ---- head ---- */
.pdx-head {
  display: flex;
  gap: 26px;
  align-items: flex-start;
  justify-content: space-between;
  padding-bottom: 22px;
  border-bottom: 1px solid var(--line);
  padding-right: 46px;
}
.pdx-head-main { min-width: 0; flex: 1; }
.pdx-title {
  margin: 0;
  font-family: var(--mono);
  font-size: clamp(22px, 2.6vw, 31px);
  font-weight: 600;
  letter-spacing: 0.005em;
  color: var(--txt-1);
  word-break: break-word;
}
.pdx-sub {
  margin: 9px 0 0;
  font-size: 14px;
  line-height: 1.72;
  color: var(--txt-2);
  max-width: 62ch;
}
.pdx-tags { display: flex; flex-wrap: wrap; gap: 7px; margin-top: 14px; }
.pdx-tag {
  font-size: 11px;
  font-family: var(--mono);
  letter-spacing: 0.03em;
  padding: 4px 9px;
  border-radius: 6px;
  border: 1px solid var(--line-2);
  background: rgba(255, 255, 255, 0.035);
  color: var(--txt-2);
}
.pdx-tag--new { border-color: rgba(34, 224, 255, 0.42); background: var(--grad-soft); color: var(--ice); }
.pdx-tag--cert { color: var(--txt-3); }

.pdx-head-actions {
  display: flex;
  gap: 9px;
  flex-shrink: 0;
  padding-top: 4px;
  margin-right: 42px;
}
.pdx-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 7px;
  font-size: 12.5px;
  font-weight: 600;
  text-decoration: none;
  padding: 10px 16px;
  border-radius: 10px;
  border: 1px solid var(--line-2);
  color: var(--txt-2);
  background: rgba(255, 255, 255, 0.035);
  cursor: pointer;
  white-space: nowrap;
  transition: all 0.24s var(--ease);
}
.pdx-btn svg { width: 14px; height: 14px; stroke: currentColor; fill: none; stroke-width: 1.7; stroke-linecap: round; stroke-linejoin: round; }
.pdx-btn:hover { color: var(--txt-1); border-color: var(--line-3); }
.pdx-btn--pri {
  border-color: transparent;
  background: var(--grad-soft);
  color: var(--ice);
  box-shadow: inset 0 0 0 1px rgba(34, 224, 255, 0.28);
}
.pdx-btn--pri:hover { background: var(--grad); color: #03121C; box-shadow: var(--glow); }

/* ---- media ---- */
.pdx-media { margin-top: 26px; }
.pdx-stage {
  position: relative;
  height: clamp(260px, 38vh, 400px);
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 26px;
  border-radius: var(--radius);
  border: 1px solid var(--line);
  background:
    radial-gradient(circle at 50% 46%, rgba(34, 224, 255, 0.14), transparent 68%),
    linear-gradient(180deg, rgba(6, 12, 24, 0.9), rgba(9, 16, 30, 0.5));
  overflow: hidden;
}
.pdx-stage img {
  max-width: 92%;
  max-height: 100%;
  object-fit: contain;
  background: linear-gradient(165deg, #FBFDFF 0%, #E9EFF8 100%);
  border-radius: 14px;
  padding: 16px 22px;
  box-shadow: 0 20px 44px -18px rgba(0, 0, 0, 0.62), 0 0 0 1px rgba(255, 255, 255, 0.09);
}
.pdx-thumbs { display: flex; gap: 10px; margin-top: 12px; flex-wrap: wrap; }
.pdx-thumb {
  width: 76px; height: 60px;
  padding: 5px;
  border-radius: 10px;
  border: 1px solid var(--line);
  background: linear-gradient(165deg, #FBFDFF 0%, #E9EFF8 100%);
  cursor: pointer;
  transition: all 0.24s var(--ease);
  display: flex; align-items: center; justify-content: center;
}
.pdx-thumb img { max-width: 100%; max-height: 100%; object-fit: contain; }
.pdx-thumb:hover { border-color: var(--line-3); transform: translateY(-2px); }
.pdx-thumb.is-on { box-shadow: 0 0 0 2px var(--cyan); }

/* ---- sections ---- */
.pdx-sec { margin-top: 34px; }
.pdx-h3 {
  margin: 0 0 14px;
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--txt-1);
  display: flex;
  align-items: center;
  gap: 10px;
}
.pdx-h3::before {
  content: "";
  width: 3px; height: 14px;
  border-radius: 2px;
  background: var(--grad);
  box-shadow: 0 0 12px rgba(34, 224, 255, 0.6);
}
.pdx-h3::after {
  content: "";
  flex: 1;
  height: 1px;
  background: linear-gradient(90deg, var(--line-2), transparent);
}
.pdx-text { margin: 0; font-size: 13.5px; line-height: 1.85; color: var(--txt-2); max-width: 90ch; }
.pdx-note {
  margin: 0;
  font-size: 13px;
  line-height: 1.8;
  color: var(--txt-3);
  padding: 14px 16px;
  border-radius: 10px;
  border: 1px dashed var(--line-2);
  background: rgba(255, 255, 255, 0.02);
}

.pdx-feats {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
  gap: 9px 26px;
}
.pdx-feats li {
  position: relative;
  padding-left: 20px;
  font-size: 13px;
  line-height: 1.72;
  color: var(--txt-2);
}
.pdx-feats li::before {
  content: "";
  position: absolute;
  left: 2px; top: 8px;
  width: 6px; height: 6px;
  border-radius: 50%;
  background: var(--grad);
  box-shadow: 0 0 9px rgba(34, 224, 255, 0.65);
}

/* ---- spec table ---- */
.pdx-specs {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(380px, 1fr));
  gap: 12px;
  align-items: start;
}
.pdx-spec {
  border: 1px solid var(--line);
  border-radius: 12px;
  background: rgba(255, 255, 255, 0.018);
  overflow: hidden;
}
.pdx-spec h4 {
  margin: 0;
  padding: 10px 14px;
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.05em;
  color: var(--ice);
  background: linear-gradient(90deg, rgba(34, 224, 255, 0.1), transparent);
  border-bottom: 1px solid var(--line);
}
.pdx-spec table { width: 100%; border-collapse: collapse; }
.pdx-spec tr + tr { border-top: 1px solid var(--line); }
.pdx-spec th,
.pdx-spec td {
  padding: 8px 14px;
  font-size: 12.5px;
  line-height: 1.65;
  vertical-align: top;
  text-align: left;
  font-weight: 400;
}
.pdx-spec th {
  width: 38%;
  color: var(--txt-3);
  font-family: var(--mono);
  font-size: 11.5px;
  letter-spacing: 0.01em;
}
.pdx-spec td { color: var(--txt-1); }

/* ---- catalogues ---- */
.pdx-cats {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
  gap: 12px;
}
.pdx-cat {
  display: flex;
  align-items: center;
  gap: 13px;
  padding: 12px;
  border-radius: 12px;
  border: 1px solid var(--line);
  background: rgba(255, 255, 255, 0.022);
  text-decoration: none;
  transition: all 0.26s var(--ease);
}
.pdx-cat:hover { border-color: rgba(34, 224, 255, 0.32); background: rgba(34, 224, 255, 0.055); transform: translateY(-2px); }
.pdx-cat-img {
  width: 62px; height: 46px;
  flex-shrink: 0;
  border-radius: 8px;
  overflow: hidden;
  display: flex; align-items: center; justify-content: center;
  background: linear-gradient(165deg, #FBFDFF 0%, #E9EFF8 100%);
}
.pdx-cat-img img { width: 100%; height: 100%; object-fit: cover; }
.pdx-cat-img--ph svg { width: 20px; height: 20px; stroke: #7C8DA6; fill: none; stroke-width: 1.6; }
.pdx-cat-txt { min-width: 0; display: flex; flex-direction: column; gap: 3px; }
.pdx-cat-txt b { font-size: 13px; font-weight: 600; color: var(--txt-1); line-height: 1.45; }
.pdx-cat-txt i { font-size: 11px; font-style: normal; color: var(--txt-3); font-family: var(--mono); }

/* ---- related models ---- */
.pdx-rels {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(250px, 1fr));
  gap: 10px;
}
.pdx-rel {
  text-align: left;
  padding: 13px 15px;
  border-radius: 11px;
  border: 1px solid var(--line);
  background: rgba(255, 255, 255, 0.022);
  cursor: pointer;
  display: flex;
  flex-direction: column;
  gap: 5px;
  transition: all 0.26s var(--ease);
  font-family: inherit;
}
.pdx-rel:hover { border-color: rgba(34, 224, 255, 0.32); background: rgba(34, 224, 255, 0.055); transform: translateY(-2px); }
.pdx-rel b { font-family: var(--mono); font-size: 13.5px; font-weight: 600; color: var(--txt-1); }
.pdx-rel span { font-size: 12px; line-height: 1.6; color: var(--txt-3); }

/* ---- applications ---- */
.pdx-apps {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 12px;
}
.pdx-app {
  border: 1px solid var(--line);
  border-radius: 12px;
  background: rgba(255, 255, 255, 0.02);
  overflow: hidden;
  padding-bottom: 14px;
}
.pdx-app-img { display: block; height: 132px; overflow: hidden; background: var(--bg-3); }
.pdx-app-img img { width: 100%; height: 100%; object-fit: cover; }
.pdx-app b { display: block; padding: 12px 14px 0; font-size: 13px; font-weight: 600; color: var(--txt-1); line-height: 1.5; }
.pdx-app p { margin: 6px 0 0; padding: 0 14px; font-size: 12px; line-height: 1.7; color: var(--txt-3); }

/* ---- footer cta ---- */
.pdx-foot {
  margin-top: 38px;
  padding: 22px 24px;
  border-radius: var(--radius);
  border: 1px solid rgba(34, 224, 255, 0.2);
  background: linear-gradient(120deg, rgba(34, 224, 255, 0.075), rgba(59, 123, 255, 0.06));
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  flex-wrap: wrap;
}
.pdx-foot p { margin: 0; font-size: 13px; line-height: 1.7; color: var(--txt-2); max-width: 62ch; }
.pdx-foot-actions { display: flex; gap: 10px; }

.pdx-loading {
  margin-top: 22px;
  padding: 16px;
  text-align: center;
  font-size: 12.5px;
  color: var(--txt-3);
  font-family: var(--mono);
  letter-spacing: 0.04em;
  border-radius: 10px;
  border: 1px dashed var(--line-2);
  animation: pdxPulse 1.6s ease-in-out infinite;
}
@keyframes pdxPulse { 0%, 100% { opacity: 0.55; } 50% { opacity: 1; } }

@media (max-width: 900px) {
  .pdx-panel { width: 96vw; height: 92vh; border-radius: 16px; }
  .pdx-scroll { padding: 22px 18px 34px; }
  .pdx-head { flex-direction: column; gap: 16px; padding-right: 0; }
  .pdx-head-actions { margin-right: 0; width: 100%; }
  .pdx-head-actions .pdx-btn { flex: 1; }
  .pdx-path { padding-right: 40px; }
  .pdx-specs, .pdx-rels { grid-template-columns: minmax(0, 1fr); }
  .pdx-feats { grid-template-columns: minmax(0, 1fr); }
  .pdx-stage { height: 240px; padding: 18px; }
}
@media (max-width: 560px) {
  .pdx-stage { height: 200px; }
  .pdx-thumb { width: 62px; height: 50px; }
  .pdx-cats, .pdx-apps { grid-template-columns: minmax(0, 1fr); }
  .pdx-foot { flex-direction: column; align-items: stretch; }
  .pdx-foot-actions .pdx-btn { width: 100%; }
}

/* ---- certification badges (detail panel) ---- */
.pdx-certs {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}
.pdx-cert {
  display: inline-flex;
  align-items: center;
  gap: 9px;
  padding: 8px 13px 8px 9px;
  border-radius: 10px;
  border: 1px solid var(--line);
  background: rgba(255, 255, 255, 0.024);
  transition: border-color 0.24s var(--ease);
}
.pdx-cert:hover { border-color: var(--line-3); }
.pdx-cert-img {
  width: 34px; height: 34px;
  border-radius: 7px;
  overflow: hidden;
  flex-shrink: 0;
  display: flex; align-items: center; justify-content: center;
  background: #FBFDFF;
}
.pdx-cert-img img { max-width: 100%; max-height: 100%; object-fit: contain; padding: 3px; }
.pdx-cert-img--ph {
  font-size: 15px;
  color: #1a8a3c;
  font-weight: 700;
}
.pdx-cert b { font-size: 12.5px; font-weight: 600; color: var(--txt-2); }