/* ============================================================
   WUZHI AUDIO — Main Stylesheet
   8px grid · Golden Ratio · 60-30-10 colour strategy
   ============================================================ */

/* ---------- CSS Custom Properties ---------- */
:root {
  /* Brand colours */
  --brand-primary: #0052FF;
  --brand-dark:    #0039C6;
  --brand-accent:  #00C6FF;
  --brand-gradient: linear-gradient(135deg, #0052FF 0%, #00C6FF 100%);

  /* 60 % – neutral / light */
  --bg-white:  #FFFFFF;
  --bg-light:  #F0F5FF;
  --bg-card:   #F7FAFF;

  /* 30 % – dark */
  --dark-900:  #0A0F1E;
  --dark-800:  #111827;
  --dark-700:  #1E2A40;
  --dark-600:  #2D3A52;

  /* Text */
  --text-primary:   #0A0F1E;
  --text-secondary: #4A5568;
  --text-muted:     #718096;
  --text-light:     #FFFFFF;

  /* Footer */
  --footer-bg:      #0A0F1E;
  --footer-address: rgba(255,255,255,0.7);

  /* Spacing (8px grid) */
  --s-4:   4px;
  --s-8:   8px;
  --s-16:  16px;
  --s-24:  24px;
  --s-32:  32px;
  --s-48:  48px;
  --s-64:  64px;
  --s-80:  80px;
  --s-96:  96px;
  --s-128: 128px;

  /* Golden ratio section split ≈ 1.618 */
  --golden: 1.618;

  /* Border radius */
  --radius-sm: 8px;
  --radius-md: 16px;
  --radius-lg: 24px;
  --radius-xl: 32px;

  /* Shadows */
  --shadow-sm: 0 2px 8px rgba(0,82,255,0.08);
  --shadow-md: 0 8px 32px rgba(0,82,255,0.12);
  --shadow-lg: 0 16px 48px rgba(0,82,255,0.18);

  /* Transitions */
  --transition: 0.3s cubic-bezier(0.4,0,0.2,1);
}

/* ---------- Reset & Base ---------- */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

html {
  scroll-behavior: smooth;
  font-size: 16px;
}

body {
  font-family: 'Inter', system-ui, -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  color: var(--text-primary);
  background: var(--bg-white);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

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

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

ul, ol { list-style: none; }

button {
  font-family: inherit;
  cursor: pointer;
  border: none;
  background: none;
}

/* ---------- Typography ---------- */
h1 { font-size: clamp(2rem, 5vw, 3.5rem); font-weight: 800; line-height: 1.15; letter-spacing: -0.02em; }
h2 { font-size: clamp(1.5rem, 3.5vw, 2.5rem); font-weight: 700; line-height: 1.2; letter-spacing: -0.01em; }
h3 { font-size: clamp(1.15rem, 2.5vw, 1.5rem); font-weight: 600; line-height: 1.3; }
h4 { font-size: 1.125rem; font-weight: 600; }
p  { font-size: 1rem; line-height: 1.7; color: var(--text-secondary); }

/* ---------- Layout ---------- */
.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 var(--s-24);
}

.section {
  padding: var(--s-96) 0;
}

.section--alt {
  background: var(--bg-light);
}

/* ---------- Buttons ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--s-8);
  padding: 14px 32px;
  font-size: 1rem;
  font-weight: 600;
  border-radius: 50px;
  transition: var(--transition);
  min-height: 48px;
  min-width: 48px;
}

.btn-primary {
  background: var(--brand-gradient);
  color: var(--text-light);
  box-shadow: 0 4px 20px rgba(0,82,255,0.35);
}
.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 30px rgba(0,82,255,0.45);
}
.btn-primary:active { transform: translateY(0); }

.btn-outline {
  border: 2px solid var(--brand-primary);
  color: var(--brand-primary);
}
.btn-outline:hover {
  background: var(--brand-primary);
  color: #fff;
  transform: translateY(-2px);
}

.btn-check-price {
  background: var(--brand-gradient);
  color: #fff;
  padding: 12px 28px;
  border-radius: 50px;
  font-weight: 600;
  font-size: 0.95rem;
  box-shadow: 0 4px 16px rgba(0,82,255,0.3);
  transition: var(--transition);
  display: inline-flex;
  align-items: center;
  gap: 8px;
  min-height: 44px;
}
.btn-check-price:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 24px rgba(0,82,255,0.4);
}
.btn-check-price svg { flex-shrink: 0; }

/* ---------- NAVIGATION ---------- */
.navbar {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 1000;
  background: rgba(255,255,255,0.95);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid rgba(0,82,255,0.08);
  transition: box-shadow var(--transition);
}
.navbar.scrolled { box-shadow: var(--shadow-md); }

.navbar__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 72px;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 var(--s-24);
}

.navbar__logo {
  display: flex;
  align-items: center;
  gap: var(--s-8);
  font-weight: 800;
  font-size: 1.25rem;
  letter-spacing: -0.02em;
  color: var(--text-primary);
}
.navbar__logo span { color: var(--brand-primary); }

.navbar__nav {
  display: flex;
  align-items: center;
  gap: var(--s-8);
}

.nav-link {
  padding: 8px 16px;
  font-weight: 500;
  font-size: 0.95rem;
  color: var(--text-secondary);
  border-radius: var(--radius-sm);
  transition: var(--transition);
  position: relative;
}
.nav-link::after {
  content: '';
  position: absolute;
  bottom: 4px; left: 50%;
  transform: translateX(-50%) scaleX(0);
  width: calc(100% - 32px);
  height: 2px;
  background: var(--brand-primary);
  border-radius: 2px;
  transition: transform var(--transition);
}
.nav-link:hover, .nav-link.active {
  color: var(--brand-primary);
}
.nav-link:hover::after, .nav-link.active::after {
  transform: translateX(-50%) scaleX(1);
}

.navbar__cta {
  background: var(--brand-gradient);
  color: #fff !important;
  padding: 10px 20px !important;
  border-radius: 50px !important;
  box-shadow: 0 4px 16px rgba(0,82,255,0.3);
}
.navbar__cta::after { display: none !important; }
.navbar__cta:hover {
  transform: translateY(-1px);
  box-shadow: 0 6px 20px rgba(0,82,255,0.4) !important;
  color: #fff !important;
}

/* Hamburger */
.hamburger {
  display: none;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  width: 44px;
  height: 44px;
  gap: 5px;
  border-radius: var(--radius-sm);
  transition: var(--transition);
}
.hamburger span {
  display: block;
  width: 24px;
  height: 2px;
  background: var(--text-primary);
  border-radius: 2px;
  transition: var(--transition);
}
.hamburger.open span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.hamburger.open span:nth-child(2) { opacity: 0; transform: scaleX(0); }
.hamburger.open span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

/* Mobile menu */
.mobile-menu {
  display: none;
  position: fixed;
  inset: 0;
  background: rgba(10,15,30,0.97);
  z-index: 999;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: var(--s-8);
  padding: var(--s-24);
}
.mobile-menu.open { display: flex; }
.mobile-menu .close-btn {
  position: absolute;
  top: 20px; right: 20px;
  width: 44px; height: 44px;
  display: flex; align-items: center; justify-content: center;
  color: #fff;
  font-size: 1.5rem;
  border-radius: var(--radius-sm);
  transition: var(--transition);
}
.mobile-menu .close-btn:hover { background: rgba(255,255,255,0.1); }
.mobile-menu a {
  color: #fff;
  font-size: 1.5rem;
  font-weight: 600;
  padding: var(--s-16) var(--s-32);
  border-radius: var(--radius-md);
  transition: var(--transition);
  text-align: center;
  width: 100%;
}
.mobile-menu a:hover {
  background: rgba(0,82,255,0.3);
  color: var(--brand-accent);
}
.mobile-menu a.active { color: var(--brand-accent); }

/* ---------- MARQUEE ---------- */
.marquee-wrap {
  background: var(--brand-gradient);
  overflow: hidden;
  padding: 14px 0;
}
.marquee-track {
  display: flex;
  width: max-content;
  animation: marquee 28s linear infinite;
}
.marquee-item {
  white-space: nowrap;
  padding: 0 var(--s-32);
  font-size: 0.875rem;
  font-weight: 600;
  color: #fff;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  display: flex;
  align-items: center;
  gap: var(--s-16);
}
.marquee-item::before {
  content: '◆';
  font-size: 0.5rem;
  opacity: 0.7;
}
@keyframes marquee {
  0%   { transform: translateX(0); }
  100% { transform: translateX(-50%); }
}
@media (prefers-reduced-motion: reduce) {
  .marquee-track { animation: none; }
}

/* ---------- HERO ---------- */
.hero {
  min-height: 100vh;
  display: flex;
  align-items: center;
  position: relative;
  overflow: hidden;
  padding: 120px 0 var(--s-80);
  background: linear-gradient(160deg, #F0F5FF 0%, #FFFFFF 40%, #E8EFFF 100%);
}
.hero::before {
  content: '';
  position: absolute;
  top: -200px; right: -200px;
  width: 800px; height: 800px;
  background: radial-gradient(circle, rgba(0,82,255,0.08) 0%, transparent 70%);
  pointer-events: none;
}
.hero::after {
  content: '';
  position: absolute;
  bottom: -100px; left: -100px;
  width: 500px; height: 500px;
  background: radial-gradient(circle, rgba(0,198,255,0.06) 0%, transparent 70%);
  pointer-events: none;
}

.hero__inner {
  display: grid;
  grid-template-columns: 1fr 1fr;
  align-items: center;
  gap: var(--s-64);
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 var(--s-24);
}

.hero__badge {
  display: inline-flex;
  align-items: center;
  gap: var(--s-8);
  background: rgba(0,82,255,0.08);
  color: var(--brand-primary);
  font-weight: 600;
  font-size: 0.8rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  padding: 8px 16px;
  border-radius: 50px;
  border: 1px solid rgba(0,82,255,0.15);
  margin-bottom: var(--s-24);
}
.hero__badge-dot {
  width: 8px; height: 8px;
  background: var(--brand-primary);
  border-radius: 50%;
  animation: pulse 2s infinite;
}
@keyframes pulse {
  0%, 100% { opacity: 1; transform: scale(1); }
  50%       { opacity: 0.5; transform: scale(0.8); }
}

.hero__title { margin-bottom: var(--s-24); }
.hero__title em {
  font-style: normal;
  background: var(--brand-gradient);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero__desc {
  font-size: 1.125rem;
  line-height: 1.7;
  margin-bottom: var(--s-32);
  max-width: 520px;
}

.hero__actions {
  display: flex;
  align-items: center;
  gap: var(--s-16);
  flex-wrap: wrap;
}

.hero__image {
  position: relative;
  display: flex;
  align-items: center;
  justify-content: center;
}
.hero__image-wrap {
  width: 100%;
  aspect-ratio: 1;
  max-width: 480px;
  background: var(--bg-light);
  border-radius: var(--radius-xl);
  overflow: hidden;
  box-shadow: var(--shadow-lg);
  display: flex;
  align-items: center;
  justify-content: center;
}
.hero__image-wrap img {
  width: 100%;
  height: 100%;
  object-fit: contain;
  padding: var(--s-32);
}
.hero__float {
  position: absolute;
  background: #fff;
  border-radius: var(--radius-md);
  padding: var(--s-16);
  box-shadow: var(--shadow-md);
  display: flex;
  align-items: center;
  gap: var(--s-8);
}
.hero__float--tl { top: var(--s-24); left: -var(--s-24); animation: float 4s ease-in-out infinite; }
.hero__float--br { bottom: var(--s-32); right: -var(--s-16); animation: float 4s ease-in-out infinite 2s; }
@keyframes float {
  0%, 100% { transform: translateY(0); }
  50%       { transform: translateY(-10px); }
}
.hero__float-icon { font-size: 1.5rem; }
.hero__float-text { font-size: 0.8rem; font-weight: 600; color: var(--text-primary); }
.hero__float-sub  { font-size: 0.7rem; color: var(--text-muted); }

/* ---------- SECTION HEADERS ---------- */
.section-header {
  text-align: center;
  margin-bottom: var(--s-64);
}
.section-eyebrow {
  display: inline-block;
  font-size: 0.8rem;
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--brand-primary);
  margin-bottom: var(--s-16);
}
.section-title { margin-bottom: var(--s-16); }
.section-desc {
  max-width: 580px;
  margin: 0 auto;
  font-size: 1.05rem;
}

/* ---------- PRODUCT CARDS ---------- */
.products-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
  gap: var(--s-32);
}

.product-card {
  background: var(--bg-white);
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-sm);
  border: 1px solid rgba(0,82,255,0.06);
  transition: var(--transition);
  display: flex;
  flex-direction: column;
}
.product-card:hover {
  transform: translateY(-8px);
  box-shadow: var(--shadow-lg);
  border-color: rgba(0,82,255,0.15);
}

.product-card__img-wrap {
  aspect-ratio: 1;
  background: var(--bg-light);
  overflow: hidden;
  display: flex;
  align-items: center;
  justify-content: center;
}
.product-card__img-wrap img {
  width: 100%;
  height: 100%;
  object-fit: contain;
  padding: var(--s-24);
  transition: transform var(--transition);
}
.product-card:hover .product-card__img-wrap img {
  transform: scale(1.04);
}

.product-card__body {
  padding: var(--s-24);
  flex: 1;
  display: flex;
  flex-direction: column;
}
.product-card__model {
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--brand-primary);
  margin-bottom: var(--s-8);
}
.product-card__title {
  font-size: 1.05rem;
  font-weight: 700;
  margin-bottom: var(--s-16);
  color: var(--text-primary);
  line-height: 1.4;
}
.product-card__desc {
  font-size: 0.9rem;
  color: var(--text-secondary);
  line-height: 1.6;
  margin-bottom: var(--s-16);
  flex: 1;
}
.product-card__specs {
  display: flex;
  flex-wrap: wrap;
  gap: var(--s-8);
  margin-bottom: var(--s-24);
}
.product-spec-tag {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  font-size: 0.75rem;
  font-weight: 600;
  background: rgba(0,82,255,0.07);
  color: var(--brand-primary);
  padding: 4px 10px;
  border-radius: 50px;
  border: 1px solid rgba(0,82,255,0.12);
}
.product-card__footer {
  margin-top: auto;
}

/* ---------- FEATURES / BENEFITS ---------- */
.features-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(240px, 1fr));
  gap: var(--s-32);
}
.feature-card {
  background: var(--bg-white);
  border-radius: var(--radius-lg);
  padding: var(--s-32);
  box-shadow: var(--shadow-sm);
  border: 1px solid rgba(0,82,255,0.06);
  transition: var(--transition);
}
.feature-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-md);
  border-color: rgba(0,82,255,0.12);
}
.feature-card__icon {
  width: 56px; height: 56px;
  background: rgba(0,82,255,0.08);
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.5rem;
  margin-bottom: var(--s-16);
}
.feature-card__title {
  font-size: 1.05rem;
  font-weight: 700;
  margin-bottom: var(--s-8);
  color: var(--text-primary);
}
.feature-card__desc {
  font-size: 0.9rem;
  color: var(--text-secondary);
  line-height: 1.6;
}

/* ---------- STATS ---------- */
.stats-section {
  background: var(--dark-900);
  padding: var(--s-80) 0;
}
.stats-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: var(--s-32);
  text-align: center;
}
.stat-item__number {
  font-size: clamp(2rem, 4vw, 3rem);
  font-weight: 800;
  background: var(--brand-gradient);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  display: block;
  line-height: 1;
  margin-bottom: var(--s-8);
}
.stat-item__label {
  font-size: 0.9rem;
  color: rgba(255,255,255,0.6);
  font-weight: 500;
}

/* ---------- REVIEWS ---------- */
.reviews-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: var(--s-24);
  align-items: start;
}
.review-card {
  background: var(--bg-white);
  border-radius: var(--radius-lg);
  padding: var(--s-24);
  box-shadow: var(--shadow-sm);
  border: 1px solid rgba(0,82,255,0.06);
  transition: var(--transition);
}
.review-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-md);
}
.review-card--featured {
  background: linear-gradient(135deg, rgba(0,82,255,0.04) 0%, rgba(0,198,255,0.04) 100%);
  border-color: rgba(0,82,255,0.12);
}
.review-card__header {
  display: flex;
  align-items: center;
  gap: var(--s-16);
  margin-bottom: var(--s-16);
}
.review-card__avatar {
  width: 44px; height: 44px;
  background: var(--brand-gradient);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  font-size: 1rem;
  color: #fff;
  flex-shrink: 0;
}
.review-card__name {
  font-weight: 700;
  font-size: 0.95rem;
  color: var(--text-primary);
}
.review-card__meta {
  font-size: 0.8rem;
  color: var(--text-muted);
}
.review-card__verified {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  font-size: 0.75rem;
  color: #16A34A;
  font-weight: 600;
  margin-bottom: var(--s-16);
}
.review-card__text {
  font-size: 0.9rem;
  color: var(--text-secondary);
  line-height: 1.65;
}
.review-card__product {
  margin-top: var(--s-16);
  font-size: 0.78rem;
  font-weight: 600;
  color: var(--brand-primary);
  background: rgba(0,82,255,0.07);
  padding: 4px 10px;
  border-radius: 50px;
  display: inline-block;
}

/* ---------- CTA SECTION ---------- */
.cta-section {
  background: var(--brand-gradient);
  padding: var(--s-96) 0;
  text-align: center;
  position: relative;
  overflow: hidden;
}
.cta-section::before {
  content: '';
  position: absolute;
  top: -50%; left: -50%;
  width: 200%; height: 200%;
  background: radial-gradient(circle at 30% 50%, rgba(255,255,255,0.08) 0%, transparent 50%),
              radial-gradient(circle at 70% 50%, rgba(0,0,0,0.1) 0%, transparent 50%);
  pointer-events: none;
}
.cta-section h2 { color: #fff; position: relative; }
.cta-section p  { color: rgba(255,255,255,0.85); max-width: 560px; margin: var(--s-16) auto var(--s-32); font-size: 1.1rem; position: relative; }
.btn-cta-white {
  background: #fff;
  color: var(--brand-primary);
  padding: 16px 40px;
  border-radius: 50px;
  font-weight: 700;
  font-size: 1rem;
  box-shadow: 0 8px 32px rgba(0,0,0,0.15);
  transition: var(--transition);
  display: inline-flex;
  align-items: center;
  gap: 8px;
  min-height: 48px;
  position: relative;
}
.btn-cta-white:hover {
  transform: translateY(-2px);
  box-shadow: 0 12px 40px rgba(0,0,0,0.2);
}

/* ---------- ABOUT PAGE ---------- */
.about-hero {
  padding: 140px 0 var(--s-80);
  background: linear-gradient(160deg, #F0F5FF 0%, #FFFFFF 60%);
}
.about-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--s-64);
  align-items: center;
}
.about-image-wrap {
  aspect-ratio: 4/3;
  background: var(--bg-light);
  border-radius: var(--radius-xl);
  overflow: hidden;
  box-shadow: var(--shadow-lg);
  display: flex;
  align-items: center;
  justify-content: center;
}
.about-image-wrap img {
  width: 100%;
  height: 100%;
  object-fit: contain;
  padding: var(--s-32);
}

.values-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--s-24);
}
.value-card {
  background: var(--bg-white);
  border-radius: var(--radius-lg);
  padding: var(--s-32);
  text-align: center;
  box-shadow: var(--shadow-sm);
  border: 1px solid rgba(0,82,255,0.06);
  transition: var(--transition);
}
.value-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-md); }
.value-card__icon { font-size: 2.5rem; margin-bottom: var(--s-16); }
.value-card__title { font-size: 1.05rem; font-weight: 700; margin-bottom: var(--s-8); }

.promise-list { display: flex; flex-direction: column; gap: var(--s-16); }
.promise-item {
  display: flex;
  align-items: flex-start;
  gap: var(--s-16);
  padding: var(--s-24);
  background: var(--bg-white);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-sm);
  border-left: 4px solid var(--brand-primary);
  transition: var(--transition);
}
.promise-item:hover { transform: translateX(4px); box-shadow: var(--shadow-md); }
.promise-item__icon { font-size: 1.5rem; flex-shrink: 0; margin-top: 2px; }
.promise-item__title { font-weight: 700; margin-bottom: 4px; }
.promise-item__desc { font-size: 0.9rem; color: var(--text-secondary); }

/* ---------- PRODUCTS PAGE ---------- */
.products-hero {
  padding: 140px 0 var(--s-64);
  background: linear-gradient(160deg, #F0F5FF 0%, #FFFFFF 60%);
  text-align: center;
}

.filter-bar {
  display: flex;
  align-items: center;
  gap: var(--s-8);
  flex-wrap: wrap;
  margin-bottom: var(--s-48);
}
.filter-btn {
  padding: 10px 20px;
  border-radius: 50px;
  font-size: 0.875rem;
  font-weight: 600;
  border: 2px solid rgba(0,82,255,0.15);
  color: var(--text-secondary);
  background: var(--bg-white);
  transition: var(--transition);
  min-height: 44px;
}
.filter-btn:hover, .filter-btn.active {
  border-color: var(--brand-primary);
  color: var(--brand-primary);
  background: rgba(0,82,255,0.06);
}
.filter-btn.active {
  background: var(--brand-primary);
  color: #fff;
  border-color: var(--brand-primary);
}

/* Product detail expanded */
.product-detail {
  background: var(--bg-white);
  border-radius: var(--radius-xl);
  overflow: hidden;
  box-shadow: var(--shadow-md);
  border: 1px solid rgba(0,82,255,0.08);
  margin-bottom: var(--s-48);
}
.product-detail__grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
}
.product-detail__img-wrap {
  background: var(--bg-light);
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 400px;
}
.product-detail__img-wrap img {
  width: 100%;
  height: 100%;
  object-fit: contain;
  padding: var(--s-48);
}
.product-detail__content { padding: var(--s-48); }
.product-detail__model {
  font-size: 0.8rem;
  font-weight: 700;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--brand-primary);
  margin-bottom: var(--s-8);
}
.product-detail__title { margin-bottom: var(--s-16); }
.product-detail__desc { margin-bottom: var(--s-24); }
.product-detail__specs-list { margin-bottom: var(--s-32); }
.spec-row {
  display: flex;
  padding: var(--s-8) 0;
  border-bottom: 1px solid rgba(0,82,255,0.06);
  font-size: 0.9rem;
}
.spec-row:last-child { border-bottom: none; }
.spec-row__key { font-weight: 600; width: 45%; color: var(--text-primary); }
.spec-row__val { color: var(--text-secondary); }

.bullets-list { margin-bottom: var(--s-24); }
.bullets-list li {
  display: flex;
  align-items: flex-start;
  gap: var(--s-8);
  font-size: 0.9rem;
  color: var(--text-secondary);
  margin-bottom: var(--s-8);
  line-height: 1.6;
}
.bullets-list li::before {
  content: '✓';
  color: var(--brand-primary);
  font-weight: 700;
  flex-shrink: 0;
  margin-top: 2px;
}

/* ---------- CONTACT PAGE ---------- */
.contact-hero {
  padding: 140px 0 var(--s-64);
  background: linear-gradient(160deg, #F0F5FF 0%, #FFFFFF 60%);
  text-align: center;
}
.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1.618fr;
  gap: var(--s-64);
  align-items: start;
}
.contact-info { display: flex; flex-direction: column; gap: var(--s-24); }
.contact-info-item {
  display: flex;
  align-items: flex-start;
  gap: var(--s-16);
  padding: var(--s-24);
  background: var(--bg-white);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-sm);
  border: 1px solid rgba(0,82,255,0.06);
  transition: var(--transition);
}
.contact-info-item:hover { box-shadow: var(--shadow-md); transform: translateY(-2px); }
.contact-info-item__icon {
  width: 48px; height: 48px;
  background: rgba(0,82,255,0.08);
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.25rem;
  flex-shrink: 0;
}
.contact-info-item__title { font-weight: 700; margin-bottom: 4px; font-size: 0.9rem; }
.contact-info-item__val { font-size: 0.9rem; color: var(--text-secondary); }
.contact-info-item__val a {
  color: var(--brand-primary);
  font-weight: 600;
  transition: var(--transition);
}
.contact-info-item__val a:hover { text-decoration: underline; }

/* Contact Form */
.contact-form-wrap {
  background: var(--bg-white);
  border-radius: var(--radius-xl);
  padding: var(--s-48);
  box-shadow: var(--shadow-md);
  border: 1px solid rgba(0,82,255,0.06);
}
.form-title { margin-bottom: var(--s-8); }
.form-subtitle { margin-bottom: var(--s-32); }
.form-group { margin-bottom: var(--s-24); }
.form-row { display: grid; grid-template-columns: 1fr 1fr; gap: var(--s-16); }
label {
  display: block;
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: var(--s-8);
}
input, select, textarea {
  width: 100%;
  padding: 14px 16px;
  border: 2px solid rgba(0,82,255,0.12);
  border-radius: var(--radius-sm);
  font-family: inherit;
  font-size: 1rem;
  color: var(--text-primary);
  background: var(--bg-white);
  transition: var(--transition);
  outline: none;
  min-height: 48px;
}
input:focus, select:focus, textarea:focus {
  border-color: var(--brand-primary);
  box-shadow: 0 0 0 3px rgba(0,82,255,0.1);
}
textarea { resize: vertical; min-height: 144px; line-height: 1.6; }
.form-submit { width: 100%; padding: 16px; font-size: 1.05rem; }

/* Success message */
.form-success {
  display: none;
  text-align: center;
  padding: var(--s-48) var(--s-24);
}
.form-success__icon { font-size: 3rem; margin-bottom: var(--s-16); }
.form-success h3 { margin-bottom: var(--s-8); }

/* FAQ */
.faq-list { max-width: 800px; margin: 0 auto; }
.faq-item {
  border-bottom: 1px solid rgba(0,82,255,0.1);
  overflow: hidden;
}
.faq-item:first-child { border-top: 1px solid rgba(0,82,255,0.1); }
.faq-question {
  width: 100%;
  text-align: left;
  padding: var(--s-24) var(--s-8);
  font-size: 1rem;
  font-weight: 600;
  color: var(--text-primary);
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: var(--s-16);
  transition: color var(--transition);
  min-height: 44px;
}
.faq-question:hover { color: var(--brand-primary); }
.faq-question.active { color: var(--brand-primary); }
.faq-icon {
  width: 24px; height: 24px;
  border: 2px solid currentColor;
  border-radius: 50%;
  display: flex; align-items: center; justify-content: center;
  flex-shrink: 0;
  font-size: 1rem;
  transition: transform var(--transition);
}
.faq-question.active .faq-icon { transform: rotate(45deg); }
.faq-answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.4s ease, padding 0.4s ease;
  padding: 0 var(--s-8);
}
.faq-answer.open {
  max-height: 400px;
  padding: 0 var(--s-8) var(--s-24);
}
.faq-answer p { font-size: 0.95rem; }

/* ---------- FOOTER ---------- */
.footer {
  background: var(--footer-bg);
  color: rgba(255,255,255,0.85);
  padding: var(--s-64) 0 var(--s-32);
}
.footer__grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: var(--s-48);
  margin-bottom: var(--s-48);
}
.footer__brand { }
.footer__logo {
  font-size: 1.25rem;
  font-weight: 800;
  color: #fff;
  margin-bottom: var(--s-16);
  display: flex;
  align-items: center;
  gap: var(--s-8);
}
.footer__logo span { color: var(--brand-accent); }
.footer__tagline {
  font-size: 0.9rem;
  color: rgba(255,255,255,0.6);
  line-height: 1.7;
  margin-bottom: var(--s-24);
}
.footer__address {
  font-size: 0.875rem;
  color: var(--footer-address);
  line-height: 1.8;
}

.footer__heading {
  font-size: 0.8rem;
  font-weight: 700;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: rgba(255,255,255,0.4);
  margin-bottom: var(--s-16);
}
.footer__links { display: flex; flex-direction: column; gap: var(--s-8); }
.footer__links a {
  font-size: 0.9rem;
  color: rgba(255,255,255,0.65);
  transition: color var(--transition);
  padding: 2px 0;
}
.footer__links a:hover { color: var(--brand-accent); }

.footer__contact-item {
  display: flex;
  align-items: flex-start;
  gap: var(--s-8);
  font-size: 0.875rem;
  color: rgba(255,255,255,0.65);
  margin-bottom: var(--s-8);
}
.footer__contact-item a {
  color: rgba(255,255,255,0.65);
  transition: color var(--transition);
}
.footer__contact-item a:hover { color: var(--brand-accent); }

.footer__bottom {
  border-top: 1px solid rgba(255,255,255,0.08);
  padding-top: var(--s-24);
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: var(--s-16);
}
.footer__copy {
  font-size: 0.875rem;
  color: rgba(255,255,255,0.45);
}
.footer__bottom-links {
  display: flex;
  gap: var(--s-24);
}
.footer__bottom-links a {
  font-size: 0.875rem;
  color: rgba(255,255,255,0.45);
  transition: color var(--transition);
}
.footer__bottom-links a:hover { color: rgba(255,255,255,0.8); }

/* ---------- PAGE HERO INNER PAGES ---------- */
.page-hero {
  padding: 140px 0 var(--s-64);
  background: linear-gradient(160deg, #F0F5FF 0%, #FFFFFF 60%);
  text-align: center;
}
.breadcrumb {
  display: flex;
  align-items: center;
  gap: 8px;
  justify-content: center;
  margin-bottom: var(--s-16);
  font-size: 0.875rem;
  color: var(--text-muted);
}
.breadcrumb a { color: var(--brand-primary); transition: color var(--transition); }
.breadcrumb a:hover { color: var(--brand-dark); }
.breadcrumb span { color: var(--text-muted); }

/* ---------- SCROLL ANIMATIONS ---------- */
[data-reveal] {
  opacity: 0;
  transform: translateY(32px);
  transition: opacity 0.7s ease, transform 0.7s ease;
}
[data-reveal].visible {
  opacity: 1;
  transform: translateY(0);
}
[data-reveal="left"] { transform: translateX(-32px); }
[data-reveal="left"].visible { transform: translateX(0); }
[data-reveal="right"] { transform: translateX(32px); }
[data-reveal="right"].visible { transform: translateX(0); }

@media (prefers-reduced-motion: reduce) {
  [data-reveal] { opacity: 1; transform: none; transition: none; }
}

/* ---------- UTILITIES ---------- */
.text-center { text-align: center; }
.text-gradient {
  background: var(--brand-gradient);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}
.mt-8  { margin-top: var(--s-8); }
.mt-16 { margin-top: var(--s-16); }
.mt-24 { margin-top: var(--s-24); }
.mt-32 { margin-top: var(--s-32); }
.mb-8  { margin-bottom: var(--s-8); }
.mb-16 { margin-bottom: var(--s-16); }
.mb-24 { margin-bottom: var(--s-24); }

/* ---------- RESPONSIVE ---------- */
@media (max-width: 1024px) {
  .hero__inner { gap: var(--s-48); }
  .footer__grid { grid-template-columns: 1fr 1fr; gap: var(--s-32); }
  .stats-grid { grid-template-columns: repeat(2, 1fr); }
  .values-grid { grid-template-columns: 1fr 1fr; }
}

@media (max-width: 768px) {
  html { font-size: 15px; }

  .navbar__nav { display: none; }
  .hamburger { display: flex; }

  .hero { min-height: auto; padding: 100px 0 60px; }
  .hero__inner { grid-template-columns: 1fr; text-align: center; }
  .hero__image { order: -1; }
  .hero__image-wrap { max-width: 320px; margin: 0 auto; }
  .hero__actions { justify-content: center; }
  .hero__float--br { right: 0; }
  .hero__float--tl { left: 0; }

  .section { padding: 60px 0; }
  .section-header { margin-bottom: var(--s-48); }

  .about-grid { grid-template-columns: 1fr; }
  .about-image-wrap { max-width: 400px; margin: 0 auto; }

  .product-detail__grid { grid-template-columns: 1fr; }
  .product-detail__content { padding: var(--s-24); }
  .product-detail__img-wrap { min-height: 280px; }

  .contact-grid { grid-template-columns: 1fr; }
  .contact-form-wrap { padding: var(--s-24); }
  .form-row { grid-template-columns: 1fr; }

  .footer__grid { grid-template-columns: 1fr; gap: var(--s-32); }
  .footer__bottom { flex-direction: column; text-align: center; }

  .stats-grid { grid-template-columns: repeat(2, 1fr); }
  .values-grid { grid-template-columns: 1fr; }

  .products-grid { grid-template-columns: 1fr; }

  .footer__bottom-links { flex-wrap: wrap; justify-content: center; }
}

@media (max-width: 480px) {
  .container { padding: 0 var(--s-16); }
  h1 { font-size: 1.875rem; }
  h2 { font-size: 1.5rem; }
  .btn { padding: 12px 24px; }
  .hero__actions { flex-direction: column; align-items: center; }
  .stats-grid { grid-template-columns: 1fr; }
}

/* ---------- Container queries (product cards) ---------- */
@container (max-width: 300px) {
  .product-card__body { padding: var(--s-16); }
}