:root {
  --bg-dark: #050810;
  --bg-card: #0c1018;
  --bg-card-hover: #121826;
  --bg-elevated: #161d2e;
  --border: rgba(0, 180, 255, 0.18);
  --border-strong: rgba(0, 180, 255, 0.42);
  --gold: #00b4ff;
  --gold-light: #5dd5ff;
  --gold-dark: #0088cc;
  --red: #c0392b;
  --red-hover: #e74c3c;
  --text: #e8e6e3;
  --text-muted: #8b9099;
  --text-dim: #5c6169;
  --success: #27ae60;
  --radius: 12px;
  --radius-lg: 18px;
  --shadow: 0 8px 32px rgba(0, 0, 0, 0.45);
  --font-display: "Cinzel", Georgia, serif;
  --font-body: "Inter", system-ui, sans-serif;
  --header-h: 72px;
}

*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

html { scroll-behavior: smooth; }

body {
  font-family: var(--font-body);
  background: var(--bg-dark);
  color: var(--text);
  line-height: 1.6;
  min-height: 100vh;
  background-image:
    radial-gradient(ellipse 80% 50% at 50% -20%, rgba(0, 180, 255, 0.1), transparent),
    radial-gradient(ellipse 60% 40% at 100% 100%, rgba(0, 136, 204, 0.06), transparent);
}

a { color: var(--gold); text-decoration: none; transition: color 0.2s; }
a:hover { color: var(--gold-light); }

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

.container {
  width: min(1200px, 92vw);
  margin: 0 auto;
}

/* Header */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  height: var(--header-h);
  background: rgba(7, 8, 13, 0.88);
  backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--border);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: var(--header-h);
  gap: 1.5rem;
}

.logo {
  display: flex;
  align-items: center;
  gap: 0.65rem;
  font-family: var(--font-display);
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--gold-light);
  letter-spacing: 0.04em;
}

.logo-img {
  height: 52px;
  width: auto;
  object-fit: contain;
  filter: drop-shadow(0 0 12px rgba(0, 180, 255, 0.35));
  transition: filter 0.2s;
}

.logo:hover .logo-img {
  filter: drop-shadow(0 0 18px rgba(0, 180, 255, 0.55));
}

.footer-brand .logo-img {
  height: 44px;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 0.25rem;
  list-style: none;
}

.nav-links a {
  color: var(--text-muted);
  padding: 0.5rem 1rem;
  border-radius: 8px;
  font-size: 0.925rem;
  font-weight: 500;
  transition: all 0.2s;
}

.nav-links a:hover,
.nav-links a.active {
  color: var(--gold);
  background: rgba(212, 175, 55, 0.08);
}

.header-actions {
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  padding: 0.65rem 1.25rem;
  border-radius: 10px;
  font-family: var(--font-body);
  font-size: 0.9rem;
  font-weight: 600;
  border: none;
  cursor: pointer;
  transition: all 0.2s;
  white-space: nowrap;
}

.btn-primary {
  background: linear-gradient(135deg, var(--gold-dark), var(--gold));
  color: #0a0a0f;
  box-shadow: 0 4px 16px rgba(0, 180, 255, 0.25);
}

.btn-primary:hover {
  transform: translateY(-1px);
  box-shadow: 0 6px 24px rgba(0, 180, 255, 0.4);
  color: #0a0a0f;
}

.btn-outline {
  background: transparent;
  color: var(--gold);
  border: 1px solid var(--border-strong);
}

.btn-outline:hover {
  background: rgba(212, 175, 55, 0.08);
  color: var(--gold-light);
}

.btn-ghost {
  background: rgba(255, 255, 255, 0.04);
  color: var(--text);
  border: 1px solid var(--border);
}

.btn-ghost:hover { background: rgba(255, 255, 255, 0.08); }

.btn-sm { padding: 0.45rem 0.9rem; font-size: 0.825rem; }

.btn-lg { padding: 0.85rem 1.75rem; font-size: 1rem; }

.mobile-toggle {
  display: none;
  background: none;
  border: 1px solid var(--border);
  color: var(--text);
  padding: 0.5rem;
  border-radius: 8px;
  cursor: pointer;
  font-size: 1.25rem;
}

/* Hero */
.hero {
  padding: 5rem 0 4rem;
  position: relative;
  overflow: hidden;
}

.hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background: url("data:image/svg+xml,%3Csvg width='60' height='60' viewBox='0 0 60 60' xmlns='http://www.w3.org/2000/svg'%3E%3Cg fill='none' fill-rule='evenodd'%3E%3Cg fill='%2300b4ff' fill-opacity='0.03'%3E%3Cpath d='M36 34v-4h-2v4h-4v2h4v4h2v-4h4v-2h-4zm0-30V0h-2v4h-4v2h4v4h2V6h4V4h-4zM6 34v-4H4v4H0v2h4v4h2v-4h4v-2H6zM6 4V0H4v4H0v2h4v4h2V6h4V4H6z'/%3E%3C/g%3E%3C/g%3E%3C/svg%3E");
  opacity: 0.5;
  pointer-events: none;
}

.hero-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 3rem;
  align-items: center;
  position: relative;
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.35rem 0.85rem;
  background: rgba(212, 175, 55, 0.1);
  border: 1px solid var(--border);
  border-radius: 999px;
  font-size: 0.8rem;
  color: var(--gold);
  margin-bottom: 1.25rem;
}

.hero h1 {
  font-family: var(--font-display);
  font-size: clamp(2rem, 4.5vw, 3.25rem);
  line-height: 1.15;
  margin-bottom: 1.25rem;
  background: linear-gradient(135deg, var(--text) 30%, var(--gold-light));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero-desc {
  color: var(--text-muted);
  font-size: 1.05rem;
  max-width: 520px;
  margin-bottom: 2rem;
}

.hero-actions { display: flex; gap: 1rem; flex-wrap: wrap; }

.hero-stats {
  display: flex;
  gap: 2rem;
  margin-top: 2.5rem;
  padding-top: 2rem;
  border-top: 1px solid var(--border);
}

.stat-item strong {
  display: block;
  font-family: var(--font-display);
  font-size: 1.5rem;
  color: var(--gold);
}

.stat-item span { font-size: 0.85rem; color: var(--text-muted); }

.hero-visual {
  position: relative;
}

.hero-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 1.5rem;
  box-shadow: var(--shadow);
}

.hero-card-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 1.25rem;
  padding-bottom: 1rem;
  border-bottom: 1px solid var(--border);
}

.hero-card-title {
  font-family: var(--font-display);
  color: var(--gold);
  font-size: 1rem;
}

.featured-mini-list { display: flex; flex-direction: column; gap: 0.75rem; }

.featured-mini-item {
  display: flex;
  align-items: center;
  gap: 0.85rem;
  padding: 0.75rem;
  background: var(--bg-elevated);
  border-radius: 10px;
  border: 1px solid transparent;
  transition: border-color 0.2s;
  cursor: pointer;
}

.featured-mini-item:hover { border-color: var(--border); }

.featured-mini-icon {
  width: 42px;
  height: 42px;
  background: rgba(212, 175, 55, 0.12);
  border-radius: 10px;
  display: grid;
  place-items: center;
  font-size: 1.25rem;
  flex-shrink: 0;
}

.featured-mini-info { flex: 1; min-width: 0; }
.featured-mini-info h4 { font-size: 0.9rem; margin-bottom: 0.15rem; }
.featured-mini-info p { font-size: 0.78rem; color: var(--text-muted); white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }

.featured-mini-price {
  font-family: var(--font-display);
  color: var(--gold);
  font-size: 0.95rem;
  flex-shrink: 0;
}

/* Sections */
.section { padding: 4rem 0; }

.section-header {
  text-align: center;
  margin-bottom: 2.5rem;
}

.section-header h2 {
  font-family: var(--font-display);
  font-size: clamp(1.5rem, 3vw, 2rem);
  color: var(--text);
  margin-bottom: 0.5rem;
}

.section-header p { color: var(--text-muted); max-width: 560px; margin: 0 auto; }

/* Categories */
.category-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(140px, 1fr));
  gap: 1rem;
}

.category-card {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.5rem;
  padding: 1.25rem 1rem;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  cursor: pointer;
  transition: all 0.2s;
  text-align: center;
}

.category-card:hover,
.category-card.active {
  border-color: var(--border-strong);
  background: var(--bg-card-hover);
  transform: translateY(-2px);
}

.category-card .cat-icon { font-size: 1.75rem; }
.category-card .cat-label { font-size: 0.85rem; color: var(--text-muted); font-weight: 500; }
.category-card.active .cat-label { color: var(--gold); }

/* System Cards */
.systems-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 1.25rem;
}

.system-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  overflow: hidden;
  transition: all 0.25s;
  display: flex;
  flex-direction: column;
}

.system-card:hover {
  border-color: var(--border-strong);
  transform: translateY(-4px);
  box-shadow: var(--shadow);
}

.system-card-top {
  padding: 1.25rem 1.25rem 0;
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 0.75rem;
}

.system-icon {
  width: 52px;
  height: 52px;
  background: linear-gradient(135deg, rgba(212, 175, 55, 0.15), rgba(212, 175, 55, 0.05));
  border: 1px solid var(--border);
  border-radius: 12px;
  display: grid;
  place-items: center;
  font-size: 1.5rem;
}

.badge {
  padding: 0.2rem 0.6rem;
  border-radius: 999px;
  font-size: 0.7rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.04em;
}

.badge-popular { background: rgba(212, 175, 55, 0.15); color: var(--gold); border: 1px solid var(--border); }
.badge-new { background: rgba(39, 174, 96, 0.15); color: var(--success); border: 1px solid rgba(39, 174, 96, 0.3); }
.badge-sale { background: rgba(192, 57, 43, 0.15); color: var(--red-hover); border: 1px solid rgba(192, 57, 43, 0.3); }

.system-card-body { padding: 1rem 1.25rem; flex: 1; }

.system-card-body h3 {
  font-size: 1.05rem;
  margin-bottom: 0.4rem;
  color: var(--text);
}

.system-card-body p {
  font-size: 0.85rem;
  color: var(--text-muted);
  line-height: 1.5;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.system-meta {
  display: flex;
  gap: 0.75rem;
  margin-top: 0.75rem;
  font-size: 0.75rem;
  color: var(--text-dim);
}

.system-card-footer {
  padding: 1rem 1.25rem 1.25rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.75rem;
  border-top: 1px solid var(--border);
}

.price-block { display: flex; align-items: baseline; gap: 0.5rem; }

.price-current {
  font-family: var(--font-display);
  font-size: 1.25rem;
  color: var(--gold);
  font-weight: 700;
}

.price-old {
  font-size: 0.85rem;
  color: var(--text-dim);
  text-decoration: line-through;
}

/* Search & Filter Bar */
.toolbar {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
  margin-bottom: 2rem;
  align-items: center;
}

.search-box {
  flex: 1;
  min-width: 220px;
  position: relative;
}

.search-box input {
  width: 100%;
  padding: 0.75rem 1rem 0.75rem 2.75rem;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 10px;
  color: var(--text);
  font-family: var(--font-body);
  font-size: 0.9rem;
  outline: none;
  transition: border-color 0.2s;
}

.search-box input:focus { border-color: var(--border-strong); }
.search-box input::placeholder { color: var(--text-dim); }

.search-icon {
  position: absolute;
  left: 0.9rem;
  top: 50%;
  transform: translateY(-50%);
  color: var(--text-dim);
  pointer-events: none;
}

.filter-chips {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
}

.chip {
  padding: 0.45rem 0.9rem;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 999px;
  font-size: 0.8rem;
  color: var(--text-muted);
  cursor: pointer;
  transition: all 0.2s;
  font-family: var(--font-body);
}

.chip:hover,
.chip.active {
  border-color: var(--border-strong);
  color: var(--gold);
  background: rgba(212, 175, 55, 0.08);
}

.sort-select {
  padding: 0.65rem 1rem;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 10px;
  color: var(--text);
  font-family: var(--font-body);
  font-size: 0.85rem;
  cursor: pointer;
  outline: none;
}

/* Product Page (mt2.work style) */
.product-page {
  padding-bottom: 4rem;
}

.product-page .breadcrumb {
  padding: 1.25rem 0 1.75rem;
  font-size: 0.875rem;
  color: var(--text-muted);
  display: flex;
  flex-wrap: wrap;
  gap: 0.45rem;
  align-items: center;
}

.product-page .breadcrumb span:not(:has(a)) { color: var(--text-dim); }
.product-page .breadcrumb > span:last-child { color: var(--gold-light); }

.product-shell {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow);
}

.product-top {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 2rem;
  padding: 2rem;
  border-bottom: 1px solid var(--border);
}

.product-gallery-main {
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
  background: #0a1018;
  min-height: 360px;
}

.product-gallery-main .gallery-main-btn,
.product-gallery-main img {
  width: 100%;
  min-height: 360px;
  max-height: 480px;
  object-fit: contain;
  background: #060a10;
}

.product-gallery-placeholder {
  min-height: 360px;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 0.75rem;
  color: var(--text-muted);
  background: linear-gradient(180deg, #0d1522, #090e16);
}

.product-gallery-icon {
  font-size: 4rem;
  filter: drop-shadow(0 0 16px rgba(0, 180, 255, 0.25));
}

.product-gallery-placeholder small {
  font-size: 0.78rem;
  color: var(--text-dim);
  opacity: 0.85;
}

.product-gallery-thumbs {
  margin-top: 0.85rem;
}

.product-summary {
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.product-category {
  display: inline-block;
  width: fit-content;
  padding: 0.25rem 0.75rem;
  border-radius: 999px;
  background: rgba(0, 180, 255, 0.1);
  border: 1px solid var(--border);
  color: var(--gold-light);
  font-size: 0.8rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.04em;
}

.product-title {
  font-family: var(--font-display);
  font-size: clamp(1.6rem, 3vw, 2.2rem);
  line-height: 1.2;
  color: var(--text);
}

.product-price-block {
  display: flex;
  align-items: baseline;
  gap: 0.75rem;
  padding: 0.75rem 0 0.25rem;
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
}

.product-price {
  font-family: var(--font-display);
  font-size: 2rem;
  font-weight: 700;
  color: var(--gold-light);
}

.product-price-old {
  font-size: 1.1rem;
  color: var(--text-dim);
  text-decoration: line-through;
}

.product-cart-row {
  display: flex;
  flex-wrap: wrap;
  gap: 0.85rem;
  align-items: flex-end;
  margin-top: 0.5rem;
}

.qty-field {
  display: flex;
  flex-direction: column;
  gap: 0.35rem;
  min-width: 88px;
}

.qty-field span {
  font-size: 0.78rem;
  color: var(--text-muted);
  font-weight: 600;
}

.qty-field input {
  width: 88px;
  padding: 0.7rem 0.75rem;
  border-radius: 8px;
  border: 1px solid var(--border);
  background: var(--bg-elevated);
  color: var(--text);
  font-size: 1rem;
  font-family: var(--font-body);
}

.btn-cart {
  flex: 1;
  min-width: 180px;
  padding: 0.85rem 1.5rem;
  border: none;
  border-radius: 8px;
  background: linear-gradient(135deg, #0088cc, #00b4ff);
  color: #fff;
  font-size: 1rem;
  font-weight: 700;
  cursor: pointer;
  transition: transform 0.2s, box-shadow 0.2s;
  box-shadow: 0 4px 18px rgba(0, 180, 255, 0.28);
}

.btn-cart:hover {
  transform: translateY(-1px);
  box-shadow: 0 6px 24px rgba(0, 180, 255, 0.38);
}

.product-meta-list {
  display: flex;
  flex-wrap: wrap;
  gap: 0.65rem;
}

.product-taxonomy {
  font-size: 0.9rem;
  color: var(--text-muted);
  padding-top: 0.5rem;
}

.product-taxonomy strong {
  color: var(--text);
  margin-right: 0.35rem;
}

.product-short-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem 1.25rem;
  font-size: 0.82rem;
  color: var(--text-dim);
  padding-top: 0.75rem;
  border-top: 1px dashed var(--border);
}

.product-tabs-wrap {
  padding: 0 2rem 2rem;
}

.product-tabs {
  display: flex;
  flex-wrap: wrap;
  gap: 0;
  border-bottom: 2px solid var(--border);
  margin-bottom: 1.5rem;
}

.product-tab {
  padding: 1rem 1.25rem;
  background: none;
  border: none;
  border-bottom: 3px solid transparent;
  margin-bottom: -2px;
  color: var(--text-muted);
  font-family: var(--font-body);
  font-size: 0.92rem;
  font-weight: 600;
  cursor: pointer;
  transition: color 0.2s, border-color 0.2s;
}

.product-tab:hover { color: var(--gold-light); }

.product-tab.active {
  color: var(--gold-light);
  border-bottom-color: var(--gold);
}

.product-tab-panel { display: none; }
.product-tab-panel.active { display: block; }

.product-lead {
  color: var(--text-muted);
  margin-bottom: 1.25rem;
  line-height: 1.7;
  font-size: 0.95rem;
}

.product-desc-list {
  list-style: none;
  display: grid;
  gap: 0.85rem;
}

.product-desc-list li {
  position: relative;
  padding-left: 1.25rem;
  color: var(--text);
  line-height: 1.6;
  font-size: 0.95rem;
}

.product-desc-list li::before {
  content: "•";
  position: absolute;
  left: 0;
  color: var(--gold);
  font-weight: 700;
}

.product-tech-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(180px, 1fr));
  gap: 1rem;
}

.product-tech-grid div {
  padding: 1rem;
  background: var(--bg-elevated);
  border: 1px solid var(--border);
  border-radius: 10px;
}

.product-tech-grid span {
  display: block;
  font-size: 0.78rem;
  color: var(--text-muted);
  margin-bottom: 0.35rem;
}

.product-tech-grid strong {
  color: var(--text);
  font-size: 0.95rem;
}

.product-tab-panel .media-video h3 { display: none; }
.product-tab-panel .video-wrapper { margin-top: 0; }

.reviews-empty {
  padding: 2rem;
  text-align: center;
  background: var(--bg-elevated);
  border: 1px dashed var(--border);
  border-radius: var(--radius);
}

.reviews-empty p { color: var(--text-muted); margin-bottom: 0.5rem; }
.reviews-note { font-size: 0.9rem; margin-bottom: 1rem !important; }

.related-products {
  padding: 2rem;
  border-top: 1px solid var(--border);
  background: rgba(0, 0, 0, 0.15);
}

.related-products h2 {
  font-family: var(--font-display);
  font-size: 1.35rem;
  margin-bottom: 1.25rem;
  color: var(--text);
}

.related-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
  gap: 1rem;
}

.related-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
  transition: border-color 0.2s, transform 0.2s;
}

.related-card:hover {
  border-color: var(--border-strong);
  transform: translateY(-2px);
}

.related-card-link {
  display: block;
  color: inherit;
}

.related-card-link:hover { color: inherit; }

.related-card-image {
  aspect-ratio: 16 / 10;
  overflow: hidden;
  background: var(--bg-elevated);
}

.related-card-image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.related-card-placeholder {
  display: grid;
  place-items: center;
  font-size: 2rem;
}

.related-card-body {
  padding: 1rem;
}

.related-card-cat {
  font-size: 0.72rem;
  color: var(--gold);
  text-transform: uppercase;
  letter-spacing: 0.04em;
}

.related-card-body h3 {
  font-size: 0.95rem;
  margin: 0.35rem 0 0.65rem;
  line-height: 1.35;
}

.related-card-price {
  font-family: var(--font-display);
  color: var(--gold-light);
  font-weight: 700;
  margin-bottom: 0.65rem;
}

.related-card-btn {
  display: inline-block;
  font-size: 0.8rem;
  color: var(--gold);
  font-weight: 600;
}

/* Detail Page (legacy) */
.detail-layout {
  display: grid;
  grid-template-columns: 1fr 340px;
  gap: 2rem;
  padding: 2rem 0 4rem;
  align-items: start;
}

.detail-main {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  overflow: hidden;
}

.detail-header {
  padding: 2rem;
  border-bottom: 1px solid var(--border);
  display: flex;
  gap: 1.25rem;
  align-items: flex-start;
}

.detail-icon {
  width: 72px;
  height: 72px;
  background: linear-gradient(135deg, rgba(212, 175, 55, 0.2), rgba(212, 175, 55, 0.05));
  border: 1px solid var(--border);
  border-radius: 16px;
  display: grid;
  place-items: center;
  font-size: 2rem;
  flex-shrink: 0;
}

.detail-title-block h1 {
  font-family: var(--font-display);
  font-size: 1.75rem;
  margin-bottom: 0.35rem;
}

.detail-title-block p { color: var(--text-muted); font-size: 0.95rem; }

.detail-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin-top: 0.75rem;
}

.tag {
  padding: 0.25rem 0.65rem;
  background: var(--bg-elevated);
  border-radius: 6px;
  font-size: 0.75rem;
  color: var(--text-muted);
}

.detail-content { padding: 2rem; }

.detail-content h3 {
  font-family: var(--font-display);
  font-size: 1.1rem;
  color: var(--gold);
  margin-bottom: 1rem;
}

.feature-list {
  list-style: none;
  display: grid;
  gap: 0.6rem;
  margin-bottom: 2rem;
}

.feature-list li {
  display: flex;
  align-items: flex-start;
  gap: 0.65rem;
  font-size: 0.9rem;
  color: var(--text-muted);
}

.feature-list li::before {
  content: "✓";
  color: var(--gold);
  font-weight: 700;
  flex-shrink: 0;
}

.includes-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(160px, 1fr));
  gap: 0.75rem;
}

.include-item {
  padding: 0.75rem 1rem;
  background: var(--bg-elevated);
  border-radius: 10px;
  font-size: 0.85rem;
  text-align: center;
  border: 1px solid var(--border);
}

/* Purchase Sidebar */
.purchase-sidebar {
  position: sticky;
  top: calc(var(--header-h) + 1.5rem);
  background: var(--bg-card);
  border: 1px solid var(--border-strong);
  border-radius: var(--radius-lg);
  padding: 1.5rem;
  box-shadow: var(--shadow);
}

.purchase-sidebar .price-current { font-size: 2rem; margin-bottom: 0.25rem; }

.purchase-sidebar .price-old { display: block; margin-bottom: 1.25rem; }

.purchase-actions { display: flex; flex-direction: column; gap: 0.75rem; margin: 1.25rem 0; }

.purchase-info {
  padding-top: 1.25rem;
  border-top: 1px solid var(--border);
  display: flex;
  flex-direction: column;
  gap: 0.65rem;
}

.info-row {
  display: flex;
  justify-content: space-between;
  font-size: 0.82rem;
}

.info-row span:first-child { color: var(--text-muted); }
.info-row span:last-child { color: var(--text); font-weight: 500; }

/* System Media */
.system-media {
  padding: 1.5rem 2rem 0;
  border-bottom: 1px solid var(--border);
}

.system-media h3 {
  font-family: var(--font-display);
  font-size: 1.05rem;
  color: var(--gold);
  margin-bottom: 1rem;
}

.media-gallery { margin-bottom: 1.5rem; }

.gallery-main {
  border-radius: var(--radius);
  overflow: hidden;
  border: 1px solid var(--border);
  background: var(--bg-elevated);
}

.gallery-main-btn {
  display: block;
  width: 100%;
  padding: 0;
  border: none;
  background: none;
  cursor: zoom-in;
}

.gallery-main-btn img {
  width: 100%;
  max-height: 420px;
  object-fit: cover;
  display: block;
  transition: transform 0.25s;
}

.gallery-main-btn:hover img { transform: scale(1.02); }

.gallery-thumbs {
  display: flex;
  gap: 0.75rem;
  margin-top: 0.85rem;
  overflow-x: auto;
  padding-bottom: 0.25rem;
}

.gallery-thumb {
  flex: 0 0 96px;
  height: 64px;
  padding: 0;
  border: 2px solid transparent;
  border-radius: 8px;
  overflow: hidden;
  cursor: pointer;
  background: var(--bg-elevated);
  transition: border-color 0.2s;
}

.gallery-thumb.active,
.gallery-thumb:hover {
  border-color: var(--gold);
}

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

.media-video { margin-bottom: 1.5rem; }

.video-wrapper {
  position: relative;
  width: 100%;
  padding-top: 56.25%;
  border-radius: var(--radius);
  overflow: hidden;
  border: 1px solid var(--border);
  background: #000;
}

.video-wrapper iframe,
.video-wrapper video {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  border: 0;
}

.system-card-cover {
  aspect-ratio: 16 / 9;
  overflow: hidden;
  border-bottom: 1px solid var(--border);
  background: var(--bg-elevated);
}

.system-card-cover img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.3s;
}

.system-card:hover .system-card-cover img { transform: scale(1.04); }

.media-lightbox {
  position: fixed;
  inset: 0;
  z-index: 300;
  background: rgba(0, 0, 0, 0.92);
  display: grid;
  place-items: center;
  padding: 2rem;
  opacity: 0;
  visibility: hidden;
  transition: opacity 0.25s, visibility 0.25s;
}

.media-lightbox.open {
  opacity: 1;
  visibility: visible;
}

.lightbox-img {
  max-width: min(1100px, 92vw);
  max-height: 85vh;
  object-fit: contain;
  border-radius: var(--radius);
  box-shadow: var(--shadow);
}

.lightbox-close {
  position: absolute;
  top: 1.25rem;
  right: 1.25rem;
  width: 44px;
  height: 44px;
  border-radius: 50%;
  border: 1px solid var(--border-strong);
  background: var(--bg-card);
  color: var(--text);
  font-size: 1.25rem;
  cursor: pointer;
  transition: background 0.2s;
}

.lightbox-close:hover { background: var(--bg-elevated); }

/* Features Section */
.features-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
  gap: 1.25rem;
}

.feature-box {
  padding: 1.5rem;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  transition: border-color 0.2s;
}

.feature-box:hover { border-color: var(--border-strong); }

.feature-box-icon {
  width: 48px;
  height: 48px;
  background: rgba(212, 175, 55, 0.1);
  border-radius: 12px;
  display: grid;
  place-items: center;
  font-size: 1.35rem;
  margin-bottom: 1rem;
}

.feature-box h3 { font-size: 1rem; margin-bottom: 0.4rem; }
.feature-box p { font-size: 0.85rem; color: var(--text-muted); }

/* FAQ */
.faq-list { max-width: 720px; margin: 0 auto; }

.faq-item {
  border: 1px solid var(--border);
  border-radius: var(--radius);
  margin-bottom: 0.75rem;
  overflow: hidden;
  background: var(--bg-card);
}

.faq-question {
  width: 100%;
  padding: 1.1rem 1.25rem;
  background: none;
  border: none;
  color: var(--text);
  font-family: var(--font-body);
  font-size: 0.95rem;
  font-weight: 600;
  text-align: left;
  cursor: pointer;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 1rem;
}

.faq-question:hover { color: var(--gold); }

.faq-answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.3s ease;
}

.faq-answer-inner {
  padding: 0 1.25rem 1.1rem;
  color: var(--text-muted);
  font-size: 0.9rem;
  line-height: 1.6;
}

.faq-item.open .faq-answer { max-height: 200px; }
.faq-item.open .faq-toggle { transform: rotate(180deg); }

.faq-toggle { transition: transform 0.3s; color: var(--gold); }

/* Contact */
.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 2rem;
}

.contact-form {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 2rem;
}

.form-group { margin-bottom: 1.25rem; }

.form-group label {
  display: block;
  font-size: 0.85rem;
  color: var(--text-muted);
  margin-bottom: 0.4rem;
  font-weight: 500;
}

.form-group input,
.form-group textarea,
.form-group select {
  width: 100%;
  padding: 0.75rem 1rem;
  background: var(--bg-elevated);
  border: 1px solid var(--border);
  border-radius: 10px;
  color: var(--text);
  font-family: var(--font-body);
  font-size: 0.9rem;
  outline: none;
  transition: border-color 0.2s;
}

.form-group input:focus,
.form-group textarea:focus,
.form-group select:focus { border-color: var(--border-strong); }

.form-group textarea { resize: vertical; min-height: 120px; }

.contact-cards { display: flex; flex-direction: column; gap: 1rem; }

.contact-card {
  padding: 1.25rem;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  display: flex;
  align-items: center;
  gap: 1rem;
}

.contact-card-icon {
  width: 48px;
  height: 48px;
  background: rgba(212, 175, 55, 0.1);
  border-radius: 12px;
  display: grid;
  place-items: center;
  font-size: 1.25rem;
}

.contact-card h4 { font-size: 0.95rem; margin-bottom: 0.15rem; }
.contact-card p { font-size: 0.85rem; color: var(--text-muted); }

/* Footer */
.site-footer {
  background: var(--bg-card);
  border-top: 1px solid var(--border);
  padding: 3rem 0 1.5rem;
  margin-top: 2rem;
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: 2rem;
  margin-bottom: 2rem;
}

.footer-brand p {
  color: var(--text-muted);
  font-size: 0.85rem;
  margin-top: 0.75rem;
  max-width: 280px;
}

.footer-col h4 {
  font-family: var(--font-display);
  font-size: 0.9rem;
  color: var(--gold);
  margin-bottom: 1rem;
}

.footer-col ul { list-style: none; }
.footer-col li { margin-bottom: 0.5rem; }
.footer-col a { color: var(--text-muted); font-size: 0.85rem; }
.footer-col a:hover { color: var(--gold); }

.footer-bottom {
  padding-top: 1.5rem;
  border-top: 1px solid var(--border);
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 1rem;
  font-size: 0.8rem;
  color: var(--text-dim);
}

/* Toast */
.toast {
  position: fixed;
  bottom: 1.5rem;
  right: 1.5rem;
  padding: 1rem 1.5rem;
  background: var(--bg-elevated);
  border: 1px solid var(--border-strong);
  border-radius: 12px;
  color: var(--text);
  font-size: 0.9rem;
  box-shadow: var(--shadow);
  transform: translateY(120%);
  opacity: 0;
  transition: all 0.3s;
  z-index: 200;
}

.toast.show { transform: translateY(0); opacity: 1; }

.empty-state {
  text-align: center;
  padding: 3rem;
  color: var(--text-muted);
}

.empty-state-icon { font-size: 3rem; margin-bottom: 1rem; opacity: 0.5; }

.breadcrumb {
  padding: 1.25rem 0;
  font-size: 0.85rem;
  color: var(--text-muted);
}

.breadcrumb a { color: var(--text-muted); }
.breadcrumb a:hover { color: var(--gold); }
.breadcrumb span { color: var(--gold); }

.page-title {
  font-family: var(--font-display);
  font-size: clamp(1.5rem, 3vw, 2rem);
  margin-bottom: 0.5rem;
}

.page-subtitle { color: var(--text-muted); margin-bottom: 2rem; }

/* Responsive */
@media (max-width: 900px) {
  .hero-grid { grid-template-columns: 1fr; }
  .hero-visual { order: -1; }
  .product-top { grid-template-columns: 1fr; padding: 1.25rem; }
  .product-tabs-wrap { padding: 0 1.25rem 1.25rem; }
  .related-products { padding: 1.25rem; }
  .detail-layout { grid-template-columns: 1fr; }
  .purchase-sidebar { position: static; }
  .footer-grid { grid-template-columns: 1fr 1fr; }
  .contact-grid { grid-template-columns: 1fr; }
}

@media (max-width: 640px) {
  .product-tab {
    padding: 0.75rem 0.85rem;
    font-size: 0.82rem;
  }

  .product-cart-row {
    flex-direction: column;
    align-items: stretch;
  }

  .btn-cart { width: 100%; }

  .nav-links {
    display: none;
    position: absolute;
    top: var(--header-h);
    left: 0;
    right: 0;
    flex-direction: column;
    background: var(--bg-card);
    border-bottom: 1px solid var(--border);
    padding: 1rem;
  }

  .nav-links.open { display: flex; }
  .mobile-toggle { display: block; }
  .header-actions .btn-outline { display: none; }
  .hero { padding: 3rem 0 2rem; }
  .hero-stats { gap: 1.25rem; }
  .footer-grid { grid-template-columns: 1fr; }
}