/* Product-specific */
  .product-top {
    display: grid;
    grid-template-columns: minmax(0, 1.1fr) minmax(0, 1fr);
    gap: 48px;
    align-items: stretch;
  }

  /* Carousel */
  .carousel {
    display: flex; flex-direction: column; gap: 14px;
    height: 100%;
  }
  .car-main {
    position: relative;
    aspect-ratio: 4/3;
    border-radius: var(--radius);
    overflow: hidden;
    background: #0b1729;
    box-shadow: var(--shadow);
    flex: 1;
  }
  .car-track {
    position: absolute; inset: 0;
    display: flex;
    transition: transform .4s cubic-bezier(.4,0,.2,1);
    will-change: transform;
  }
  .car-slide {
    flex: 0 0 100%;
    background-size: cover; background-position: center;
    background-color: #0b1729;
  }
  .car-main .badges {
    position: absolute; top: 18px; left: 18px;
    display: flex; gap: 8px; z-index: 3;
  }
  .car-main .zoom {
    position: absolute; top: 18px; right: 18px;
    width: 42px; height: 42px; border-radius: 50%;
    background: rgba(255,255,255,0.95); display: grid; place-items: center;
    box-shadow: var(--shadow); z-index: 3;
  }
  .car-arrow {
    position: absolute; top: 50%; transform: translateY(-50%);
    width: 44px; height: 44px; border-radius: 50%;
    background: rgba(255,255,255,0.95);
    border: none;
    display: grid; place-items: center;
    cursor: pointer;
    box-shadow: var(--shadow);
    z-index: 3;
    transition: background .15s;
  }
  .car-arrow:hover { background: white; }
  .car-arrow.prev { left: 16px; }
  .car-arrow.next { right: 16px; }
  .car-arrow svg { width: 18px; height: 18px; color: var(--ink-900); }
  .car-dots {
    position: absolute; bottom: 14px; left: 50%; transform: translateX(-50%);
    display: flex; gap: 6px; z-index: 3;
  }
  .car-dots .dot {
    width: 8px; height: 8px; border-radius: 50%;
    background: rgba(255,255,255,0.45);
    transition: all .2s;
    cursor: pointer;
    border: none;
    padding: 0;
  }
  .car-dots .dot.active { background: white; width: 22px; border-radius: 4px; }
  .car-thumbs {
    display: grid;
    grid-template-columns: repeat(5, 1fr);
    gap: 10px;
  }
  .car-thumb {
    aspect-ratio: 4/3;
    border-radius: 8px;
    background-size: cover; background-position: center;
    cursor: pointer;
    border: 2px solid transparent;
    opacity: 0.75;
    transition: all .15s;
    background-color: #0b1729;
  }
  .car-thumb:hover { opacity: 1; }
  .car-thumb.active { border-color: var(--blue-600); opacity: 1; }

  /* Right info */
  .product-info {
    display: flex; flex-direction: column;
    gap: 0;
  }
  .product-info .chip { margin-bottom: 14px; align-self: flex-start; }
  .product-info h1 {
    font-size: clamp(26px, 2.6vw, 34px);
    line-height: 1.18;
    margin: 0 0 10px;
    font-weight: 800;
    letter-spacing: -0.01em;
  }
  .product-info .subtitle {
    color: var(--ink-600); font-size: 15px; margin: 0 0 18px; line-height: 1.55;
  }
  .std-row {
    display: flex; flex-wrap: wrap; gap: 6px;
    margin-bottom: 18px;
  }
  .std-row .std {
    font-size: 11.5px; font-weight: 700; letter-spacing: 0.08em;
    padding: 5px 10px;
    border: 1px solid var(--ink-200);
    border-radius: 6px;
    color: var(--ink-700);
    background: white;
  }
  .pill-stats {
    display: grid; grid-template-columns: repeat(3, 1fr);
    gap: 0;
    padding: 16px 0;
    border-top: 1px solid var(--ink-100);
    border-bottom: 1px solid var(--ink-100);
    margin-bottom: 18px;
  }
  .pill-stats > div {
    text-align: left;
    padding: 0 16px;
    border-right: 1px solid var(--ink-100);
  }
  .pill-stats > div:first-child { padding-left: 0; }
  .pill-stats > div:last-child { border-right: none; }
  .pill-stats b {
    display: block; font-size: 20px; color: var(--ink-900); font-weight: 800;
    letter-spacing: -0.01em;
    line-height: 1;
    margin-bottom: 6px;
  }
  .pill-stats span { color: var(--ink-500); font-size: 11.5px; letter-spacing: 0.08em; text-transform: uppercase; font-weight: 600; }

  .feat-mini {
    display: grid; grid-template-columns: 1fr 1fr;
    gap: 10px 18px;
    margin: 0 0 20px;
  }
  .feat-mini > div {
    display: flex; gap: 10px; align-items: flex-start;
    color: var(--ink-700);
    font-size: 13.5px;
    line-height: 1.45;
  }
  .feat-mini .check {
    flex: 0 0 18px; height: 18px; border-radius: 50%;
    background: var(--blue-50); color: var(--blue-600);
    display: grid; place-items: center;
    margin-top: 2px;
  }
  .feat-mini .check svg { width: 10px; height: 10px; }

  .cta-row {
    display: flex; gap: 10px; flex-wrap: wrap;
    padding-top: 18px;
    border-top: 1px solid var(--ink-100);
    margin-top: auto;
  }
  .cta-row .btn { flex: 1 1 auto; justify-content: center; }

  /* Section anchor nav */
  .tabs {
    display: flex;
    gap: 6px;
    border-bottom: 1px solid var(--ink-100);
    margin-bottom: 40px;
    position: sticky;
    top: 78px;
    background: white;
    z-index: 20;
    padding-top: 4px;
    overflow-x: auto;
  }
  .tab-btn {
    background: none; border: none; cursor: pointer;
    padding: 18px 22px;
    font: inherit;
    font-weight: 700;
    font-size: 14px;
    letter-spacing: 0.05em;
    color: var(--ink-500);
    border-bottom: 2px solid transparent;
    margin-bottom: -1px;
    transition: color .15s, border-color .15s;
    white-space: nowrap;
  }
  .tab-btn:hover { color: var(--ink-900); }
  .tab-btn.active { color: var(--blue-600); border-color: var(--blue-600); }

  .section-block { scroll-margin-top: 160px; padding-bottom: 64px; }
  .section-block + .section-block { border-top: 1px solid var(--ink-100); padding-top: 56px; }

  /* Specs table */
  .specs-grid {
    display: grid;
    grid-template-columns: 1.2fr 1fr;
    gap: 40px;
  }
  .spec-table {
    width: 100%;
    border-collapse: collapse;
    background: white;
    border: 1px solid var(--ink-100);
    border-radius: var(--radius);
    overflow: hidden;
  }
  .spec-table th, .spec-table td {
    text-align: left;
    padding: 14px 20px;
    font-size: 14px;
  }
  .spec-table thead th {
    background: var(--ink-50);
    font-weight: 700;
    color: var(--ink-700);
    text-transform: uppercase;
    font-size: 12px;
    letter-spacing: 0.1em;
    border-bottom: 1px solid var(--ink-100);
  }
  .spec-table tbody tr + tr { border-top: 1px solid var(--ink-100); }
  .spec-table td:first-child { color: var(--ink-700); width: 46%; }
  .spec-table td:last-child { font-weight: 600; color: var(--ink-900); }

  .spec-note {
    background: linear-gradient(180deg, var(--blue-50), white);
    border: 1px solid #dbeafe;
    border-radius: var(--radius);
    padding: 24px;
  }
  .spec-note h4 { margin: 0 0 10px; color: var(--blue-600); font-size: 14px; letter-spacing: 0.14em; text-transform: uppercase; }
  .spec-note p { margin: 0 0 10px; color: var(--ink-700); font-size: 14.5px; }
  .spec-note ul { margin: 0; padding-left: 18px; color: var(--ink-700); font-size: 14.5px; }
  .spec-note li { margin-bottom: 6px; }

  /* Features grid */
  .feat-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 22px; }
  .feat-card {
    padding: 28px;
    background: white;
    border: 1px solid var(--ink-100);
    border-radius: var(--radius);
    transition: transform .15s, box-shadow .15s;
  }
  .feat-card:hover { transform: translateY(-3px); box-shadow: var(--shadow); border-color: #dbeafe; }
  .feat-icon {
    width: 48px; height: 48px; border-radius: 10px;
    background: var(--blue-50); color: var(--blue-600);
    display: grid; place-items: center;
    margin-bottom: 18px;
  }
  .feat-icon svg { width: 22px; height: 22px; }
  .feat-card h4 { margin: 0 0 8px; font-size: 17px; font-weight: 700; }
  .feat-card p { margin: 0; color: var(--ink-600); font-size: 14.5px; }

  /* Construction diagram */
  .construction {
    display: grid; grid-template-columns: 1fr 1fr; gap: 40px; align-items: center;
  }
  .cable-diagram {
    aspect-ratio: 1;
    border-radius: var(--radius);
    background: radial-gradient(circle at 30% 30%, #1e293b, #0b1729);
    position: relative;
    overflow: hidden;
    box-shadow: var(--shadow);
  }
  .cable-layer-list { list-style: none; margin: 0; padding: 0; }
  .cable-layer-list li {
    display: grid;
    grid-template-columns: 40px 1fr;
    gap: 16px;
    padding: 16px 0;
    border-bottom: 1px solid var(--ink-100);
  }
  .cable-layer-list li:last-child { border-bottom: none; }
  .cable-layer-list .num {
    width: 34px; height: 34px; border-radius: 50%;
    background: var(--blue-600); color: white;
    display: grid; place-items: center;
    font-weight: 700; font-size: 14px;
  }
  .cable-layer-list h5 { margin: 0 0 2px; font-size: 15px; font-weight: 700; }
  .cable-layer-list p { margin: 0; color: var(--ink-600); font-size: 14px; }

  /* Applications */
  .apps-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 20px; }
  .app-card {
    border-radius: var(--radius);
    overflow: hidden;
    aspect-ratio: 4/5;
    position: relative;
    background-size: cover; background-position: center;
    color: white;
  }
  .app-card::after {
    content: ""; position: absolute; inset: 0;
    background: linear-gradient(180deg, transparent 40%, rgba(11,23,41,0.95));
  }
  .app-card .label {
    position: absolute; inset: auto 0 0 0; padding: 20px; z-index: 1;
  }
  .app-card h5 { margin: 0 0 4px; font-size: 16px; font-weight: 700; }
  .app-card p { margin: 0; font-size: 13px; opacity: 0.8; }

  /* Downloads */
  .download-list {
    display: grid; grid-template-columns: repeat(2, 1fr); gap: 16px;
  }
  .download-card {
    display: flex; gap: 16px; align-items: center;
    padding: 18px;
    border: 1px solid var(--ink-100);
    border-radius: var(--radius);
    background: white;
    cursor: pointer;
    transition: border-color .15s, transform .15s;
  }
  .download-card:hover { border-color: var(--blue-600); transform: translateY(-2px); }
  .download-card .dl-icon {
    width: 44px; height: 44px; border-radius: 10px; flex-shrink: 0;
    background: var(--blue-50); color: var(--blue-600);
    display: grid; place-items: center;
  }
  .download-card b { display: block; font-size: 15px; font-weight: 700; }
  .download-card span { color: var(--ink-500); font-size: 13px; }

  /* Sticky inquiry */
  .inquiry-rail {
    position: sticky; top: 140px;
    background: white;
    border: 1px solid var(--ink-100);
    border-radius: var(--radius);
    padding: 24px;
    box-shadow: var(--shadow);
  }
  .inquiry-rail h3 { margin: 0 0 8px; font-size: 20px; font-weight: 800; }
  .inquiry-rail p { margin: 0 0 18px; color: var(--ink-600); font-size: 14px; }
  .inquiry-rail .field { margin-bottom: 12px; }
  .inquiry-rail label {
    display: block; font-size: 12px; color: var(--ink-700); font-weight: 600; margin-bottom: 6px;
  }
  .inquiry-rail input, .inquiry-rail select, .inquiry-rail textarea {
    width: 100%; border: 1px solid var(--ink-200); border-radius: 8px;
    padding: 10px 12px;
    font: inherit; font-size: 14px;
    transition: border-color .15s;
  }
  .inquiry-rail input:focus, .inquiry-rail select:focus, .inquiry-rail textarea:focus {
    outline: none; border-color: var(--blue-600);
  }
  .inquiry-rail .btn { width: 100%; justify-content: center; margin-top: 6px; }
  .inquiry-contact {
    display: flex; gap: 10px; margin-top: 16px; padding-top: 16px; border-top: 1px solid var(--ink-100);
    font-size: 13px; color: var(--ink-600);
  }

  /* Related products */
  .related-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 20px; }
  .related-card {
    background: white; border-radius: var(--radius);
    overflow: hidden; box-shadow: var(--shadow-sm);
    transition: transform .15s, box-shadow .15s;
    border: 1px solid var(--ink-100);
  }
  .related-card:hover { transform: translateY(-3px); box-shadow: var(--shadow); }
  .related-card .img {
    aspect-ratio: 4/3;
    background-size: cover; background-position: center;
    background-color: #0b1729;
  }
  .related-card .body { padding: 18px; }
  .related-card h5 { margin: 0 0 6px; font-size: 15px; font-weight: 700; line-height: 1.3; }
  .related-card span { color: var(--blue-600); font-size: 13px; font-weight: 600; display: inline-flex; align-items: center; gap: 6px; }

  /* Two-col layout (tabs + inquiry) */
  .product-body {
    display: grid;
    grid-template-columns: 1fr 340px;
    gap: 48px;
    align-items: flex-start;
  }
  @media (max-width: 980px) {
    .product-top { grid-template-columns: 1fr; }
    .product-body { grid-template-columns: 1fr; }
    .grid-2, .grid-3, .grid-4, .specs-grid, .feat-grid, .construction, .apps-grid, .download-list, .related-grid {
      grid-template-columns: 1fr !important;
    }
  }