:root {
  --primary: #2d4a4e;
  --primary-light: #3d6066;
  --accent: #c9a962;
  --bg: #f5f9f8;
  --text-main: #2d4a4e;
  --text-muted: #5a7a7e;
  --card-bg: #ffffff;
  --border-soft: #d4e5e2;
  --shadow-soft: 0 8px 24px rgba(45, 74, 78, 0.08);
  --radius-xl: 1.5rem;
  --radius-lg: 1rem;
  --radius-pill: 999px;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  background: var(--bg);
  color: var(--text-main);
  line-height: 1.6;
}

img {
  max-width: 100%;
  display: block;
}

a {
  color: inherit;
  text-decoration: none;
}

.container {
  width: min(1120px, calc(100% - 2rem));
  margin: 0 auto;
}

.page {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

.product-header {
  background: rgba(245, 249, 248, 0.95);
  backdrop-filter: blur(18px);
  border-bottom: 1px solid rgba(212, 229, 226, 0.8);
  position: sticky;
  top: 0;
  z-index: 20;
}

.product-header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding: 1rem 0.25rem;
}

.product-logo {
  display: inline-flex;
  align-items: center;
  gap: 0.75rem;
  font-weight: 700;
  font-size: 0.95rem;
  line-height: 1.25;
  letter-spacing: 0.02em;
  white-space: nowrap;
  flex-shrink: 0;
}

.product-logo img {
  width: 48px;
  height: 48px;
  border-radius: 0.75rem;
  object-fit: cover;
  box-shadow: var(--shadow-soft);
  flex-shrink: 0;
}

.product-logo span {
  white-space: nowrap;
}

.product-header-actions {
  display: flex;
  align-items: center;
  gap: 1rem;
  flex-wrap: wrap;
}

.product-nav-link {
  color: var(--text-muted);
  font-size: 0.92rem;
}

.lang-switch {
  display: inline-flex;
  border: 1px solid var(--border-soft);
  border-radius: var(--radius-pill);
  overflow: hidden;
  background: #fff;
}

.lang-btn {
  border: 0;
  background: transparent;
  padding: 0.35rem 0.7rem;
  cursor: pointer;
  color: var(--text-muted);
}

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

html[data-lang="en"] .lang-zh,
html:not([data-lang="en"]) .lang-en {
  display: none;
}

.product-main {
  flex: 1;
  padding: 1.5rem 0 3rem;
}

.product-breadcrumb {
  display: flex;
  flex-wrap: wrap;
  gap: 0.45rem;
  font-size: 0.88rem;
  color: var(--text-muted);
  margin-bottom: 1.25rem;
}

.product-breadcrumb .current {
  color: var(--text-main);
}

.product-layout {
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  gap: 2rem;
  align-items: start;
}

.product-gallery-main {
  background: var(--card-bg);
  border: 1px solid var(--border-soft);
  border-radius: var(--radius-xl);
  overflow: hidden;
  box-shadow: var(--shadow-soft);
}

.product-gallery-main img {
  width: 100%;
  aspect-ratio: 1 / 1;
  object-fit: cover;
}

.product-gallery-main {
  position: relative;
}

.product-gallery-main-button {
  display: block;
  width: 100%;
  border: 0;
  padding: 0;
  background: transparent;
  cursor: zoom-in;
}

.product-gallery-controls {
  position: absolute;
  inset: 0;
  pointer-events: none;
  z-index: 4;
}

.product-gallery-arrow,
.product-gallery-counter {
  position: absolute;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border: 0;
  color: #fff;
  background: rgba(28, 40, 42, 0.52);
  box-shadow: 0 6px 16px rgba(28, 40, 42, 0.18);
  backdrop-filter: blur(4px);
}

.product-gallery-arrow {
  top: 50%;
  width: 2.25rem;
  height: 2.25rem;
  border-radius: 999px;
  font-size: 1.55rem;
  line-height: 1;
  transform: translateY(-50%);
  cursor: pointer;
  pointer-events: auto;
}

.product-gallery-arrow:hover,
.product-gallery-arrow:focus-visible {
  background: rgba(28, 40, 42, 0.72);
  outline: none;
}

.product-gallery-arrow.prev {
  left: 0.75rem;
}

.product-gallery-arrow.next {
  right: 0.75rem;
}

.product-gallery-counter {
  top: 0.75rem;
  right: 0.75rem;
  min-width: 2.8rem;
  height: 1.65rem;
  padding: 0 0.5rem;
  border-radius: 0.45rem;
  font-size: 0.78rem;
  font-weight: 700;
  pointer-events: none;
}

.gslide-number,
.glightbox-slide-number {
  position: absolute;
  top: 16px;
  left: 16px;
  right: auto;
  bottom: auto;
  transform: none;
  background-color: rgba(0, 0, 0, 0.7);
  color: #fff;
  padding: 4px 10px;
  font-size: 13px;
  border-radius: 999px;
  z-index: 9999;
  pointer-events: none;
}

.product-gallery-thumbs {
  display: flex;
  gap: 0.65rem;
  margin-top: 0.85rem;
  flex-wrap: wrap;
}

.product-thumb {
  border: 2px solid transparent;
  border-radius: 0.75rem;
  padding: 0;
  overflow: hidden;
  width: 72px;
  height: 72px;
  cursor: pointer;
  background: #fff;
}

.product-thumb.active {
  border-color: var(--primary);
}

.product-thumb img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.product-details {
  background: rgba(255, 255, 255, 0.88);
  border: 1px solid var(--border-soft);
  border-radius: var(--radius-xl);
  padding: 1.5rem;
  box-shadow: var(--shadow-soft);
}

.product-panel-meta {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 0.75rem;
  margin-bottom: 0.45rem;
}

.product-ref {
  font-size: 0.82rem;
  color: var(--text-muted);
  margin: 0;
  line-height: 1.4;
}

.product-category-badge {
  flex-shrink: 0;
  display: inline-flex;
  align-items: center;
  padding: 0.24rem 0.7rem;
  border-radius: var(--radius-pill);
  background: rgba(45, 74, 78, 0.06);
  border: 1px solid var(--border-soft);
  color: var(--primary);
  font-size: 0.78rem;
  font-weight: 600;
  letter-spacing: 0.02em;
  white-space: nowrap;
}

.product-title {
  font-size: clamp(1.5rem, 2.5vw, 2rem);
  line-height: 1.3;
  margin: 0 0 0.75rem;
}

.product-price {
  font-size: 1.35rem;
  font-weight: 700;
  line-height: 1.3;
  margin: 0 0 0.75rem;
}

.product-price-row {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 0.55rem;
  margin-bottom: 0.85rem;
}

.product-price-row .product-price,
.product-price-row .product-quick-view-price {
  margin: 0;
}

.product-enquiry-help {
  margin: 0.75rem 0 0;
  font-size: 0.85rem;
  line-height: 1.55;
  color: var(--text-muted);
}

.product-collection-series {
  color: var(--text-muted);
  font-size: 0.9rem;
  line-height: 1.55;
  margin: -0.35rem 0 0.85rem;
}

.product-info-block {
  padding: 0.7rem 0.8rem;
  border-radius: 0.8rem;
  background: rgba(45, 74, 78, 0.035);
  border: 1px solid rgba(212, 229, 226, 0.9);
  margin-bottom: 0.65rem;
}

.product-info-label {
  display: block;
  font-size: 0.72rem;
  font-weight: 600;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  color: var(--text-muted);
  margin-bottom: 0.3rem;
}

.product-info-text {
  margin: 0;
  font-size: 0.92rem;
  line-height: 1.6;
  color: var(--text-main);
}

.product-materials.product-info-block {
  margin-bottom: 0.65rem;
}

.product-excerpt.product-info-block {
  margin-bottom: 1rem;
}

.product-related h2 {
  font-size: 0.95rem;
  margin: 0 0 0.45rem;
}

.product-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  margin-top: 0.25rem;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0.7rem 1.1rem;
  border-radius: var(--radius-pill);
  font-weight: 600;
  border: 1px solid transparent;
}

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

.btn-ghost {
  background: transparent;
  border-color: var(--border-soft);
  color: var(--primary);
}

.product-related {
  margin-top: 2.5rem;
}

.product-related-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
  gap: 1rem;
  margin-top: 1rem;
}

.product-related-card {
  background: #fff;
  border: 1px solid var(--border-soft);
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-soft);
}

.product-related-image img {
  width: 100%;
  aspect-ratio: 1 / 1;
  object-fit: cover;
}

.product-related-label {
  margin: 0 0 0.25rem;
  font-size: 0.75rem;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.04em;
}

.product-related-body {
  padding: 0.85rem;
}

.product-related-body h3 {
  font-size: 0.95rem;
  margin: 0 0 0.35rem;
}

.product-related-price {
  margin: 0;
  font-weight: 700;
}

.product-related-empty {
  color: var(--text-muted);
}

.product-footer {
  margin-top: 2.5rem;
  border-top: 1px solid var(--border-soft);
  padding: 1.2rem 0 1.8rem;
  color: var(--text-muted);
  font-size: 0.75rem;
  background: linear-gradient(to bottom, transparent, rgba(45, 74, 78, 0.03));
}

.product-footer-inner {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 0.5rem;
}

@media (max-width: 860px) {
  .product-layout {
    grid-template-columns: 1fr;
  }

  .product-logo {
    font-size: 0.85rem;
  }
}