/* ============================================
   Yingdong Fitness - Premium Arena Dark Theme
   ============================================ */

/* ---------- CSS Variables ---------- */
:root {
  /* Colors - Premium Arena Dark */
  --bg-primary: #0a0a0a;
  --bg-secondary: #141414;
  --bg-card: #18181b;
  --bg-card-hover: #1f1f23;
  --bg-input: #1f1f23;
  
  --text-primary: #fafafa;
  --text-secondary: #a1a1aa;
  --text-muted: #71717a;
  
  --accent: #a3e635;
  --accent-hover: #bef264;
  --accent-dark: #84cc16;
  --accent-glow: rgba(163, 230, 53, 0.15);
  
  --border: #27272a;
  --border-light: #3f3f46;
  
  --success: #22c55e;
  --warning: #f59e0b;
  --error: #ef4444;
  
  /* Typography */
  --font-display: 'Oswald', sans-serif;
  --font-body: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  
  /* Spacing */
  --spacing-xs: 0.5rem;
  --spacing-sm: 0.75rem;
  --spacing-md: 1rem;
  --spacing-lg: 1.5rem;
  --spacing-xl: 2rem;
  --spacing-2xl: 3rem;
  --spacing-3xl: 4rem;
  
  /* Radius */
  --radius-sm: 0.375rem;
  --radius-md: 0.5rem;
  --radius-lg: 0.75rem;
  --radius-xl: 1rem;
  
  /* Shadows */
  --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.3);
  --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.4);
  --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.5);
  --shadow-glow: 0 0 30px rgba(163, 230, 53, 0.1);
  
  /* Transitions */
  --transition-fast: 150ms ease;
  --transition-normal: 250ms ease;
  --transition-slow: 350ms ease;
  
  /* Container */
  --container-max: 1280px;
  --container-padding: 1.5rem;
}

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

html {
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-body);
  background-color: var(--bg-primary);
  color: var(--text-primary);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-display);
  font-weight: 600;
  line-height: 1.2;
  letter-spacing: -0.02em;
}

a {
  color: inherit;
  text-decoration: none;
  transition: color var(--transition-fast);
}

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

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

ul, ol {
  list-style: none;
}

/* ---------- Container ---------- */
.container {
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 var(--container-padding);
}

/* ---------- Buttons ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  padding: 0.75rem 1.5rem;
  font-size: 0.875rem;
  font-weight: 500;
  border-radius: var(--radius-md);
  transition: all var(--transition-fast);
  cursor: pointer;
  border: 1px solid transparent;
  text-align: center;
}

.btn-primary {
  background-color: var(--accent);
  color: var(--bg-primary);
  border-color: var(--accent);
}

.btn-primary:hover {
  background-color: var(--accent-hover);
  border-color: var(--accent-hover);
  box-shadow: var(--shadow-glow);
}

.btn-secondary {
  background-color: transparent;
  color: var(--text-primary);
  border-color: var(--border);
}

.btn-secondary:hover {
  background-color: var(--bg-card);
  border-color: var(--border-light);
}

.btn-outline {
  background-color: transparent;
  color: var(--accent);
  border-color: var(--accent);
}

.btn-outline:hover {
  background-color: var(--accent-glow);
}

.btn-sm {
  padding: 0.5rem 1rem;
  font-size: 0.8125rem;
}

.btn-lg {
  padding: 1rem 2rem;
  font-size: 1rem;
}

.btn-icon {
  padding: 0.5rem;
  width: 2.5rem;
  height: 2.5rem;
}

/* ---------- Badge ---------- */
.badge {
  display: inline-flex;
  align-items: center;
  padding: 0.25rem 0.625rem;
  font-size: 0.75rem;
  font-weight: 500;
  border-radius: 9999px;
  background-color: var(--accent-glow);
  color: var(--accent);
  border: 1px solid rgba(163, 230, 53, 0.2);
}

.badge-secondary {
  background-color: var(--bg-card);
  color: var(--text-secondary);
  border-color: var(--border);
}

/* ---------- Card ---------- */
.card {
  background-color: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  overflow: hidden;
  transition: all var(--transition-normal);
}

.card:hover {
  border-color: var(--border-light);
  transform: translateY(-2px);
  box-shadow: var(--shadow-lg);
}

.card-body {
  padding: var(--spacing-lg);
}

/* ---------- Section ---------- */
.section {
  padding: var(--spacing-3xl) 0;
}

.section-header {
  text-align: center;
  margin-bottom: var(--spacing-2xl);
}

.section-subtitle {
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--accent);
  text-transform: uppercase;
  letter-spacing: 0.1em;
  margin-bottom: var(--spacing-sm);
}

.section-title {
  font-size: 2.5rem;
  margin-bottom: var(--spacing-md);
}

.section-desc {
  font-size: 1.125rem;
  color: var(--text-secondary);
  max-width: 600px;
  margin: 0 auto;
}

/* ---------- Navigation ---------- */
.navbar {
  position: sticky;
  top: 0;
  z-index: 50;
  background-color: rgba(10, 10, 10, 0.8);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border);
}

.nav-container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 4rem;
}

.logo {
  display: flex;
  align-items: center;
  gap: 0.625rem;
  font-family: var(--font-display);
  font-size: 1.25rem;
  font-weight: 700;
  letter-spacing: -0.02em;
}

.logo-icon {
  width: 2rem;
  height: 2rem;
  background-color: var(--accent);
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--bg-primary);
}

.logo span {
  color: var(--accent);
}

.nav-menu {
  display: flex;
  align-items: center;
  gap: 0.25rem;
}

.nav-link {
  padding: 0.5rem 0.875rem;
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--text-secondary);
  border-radius: var(--radius-md);
  transition: all var(--transition-fast);
}

.nav-link:hover,
.nav-link.active {
  color: var(--text-primary);
  background-color: var(--bg-card);
}

.nav-actions {
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.nav-rfq-btn {
  position: relative;
  display: flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.5rem 1rem;
  background-color: var(--accent);
  color: var(--bg-primary);
  border-radius: var(--radius-md);
  font-size: 0.875rem;
  font-weight: 600;
  transition: all var(--transition-fast);
}

.nav-rfq-btn:hover {
  background-color: var(--accent-hover);
  box-shadow: var(--shadow-glow);
}

.rfq-badge {
  background-color: var(--bg-primary);
  color: var(--accent);
  font-size: 0.7rem;
  font-weight: 700;
  padding: 0.125rem 0.375rem;
  border-radius: 9999px;
  min-width: 1.25rem;
  text-align: center;
}

.mobile-menu-btn {
  display: none;
  padding: 0.5rem;
  color: var(--text-secondary);
  border-radius: var(--radius-md);
}

.mobile-menu-btn:hover {
  color: var(--text-primary);
  background-color: var(--bg-card);
}

/* ---------- Mobile Menu ---------- */
.mobile-menu {
  display: none;
  position: fixed;
  top: 0;
  right: 0;
  width: 280px;
  height: 100vh;
  background-color: var(--bg-secondary);
  border-left: 1px solid var(--border);
  z-index: 100;
  padding: 1rem;
  transform: translateX(100%);
  transition: transform var(--transition-normal);
}

.mobile-menu.open {
  transform: translateX(0);
}

.mobile-menu-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 1.5rem;
  padding-bottom: 1rem;
  border-bottom: 1px solid var(--border);
}

.mobile-nav {
  display: flex;
  flex-direction: column;
  gap: 0.25rem;
}

.mobile-nav-link {
  padding: 0.75rem 1rem;
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--text-secondary);
  border-radius: var(--radius-md);
  transition: all var(--transition-fast);
}

.mobile-nav-link:hover,
.mobile-nav-link.active {
  color: var(--text-primary);
  background-color: var(--bg-card);
}

.mobile-overlay {
  display: none;
  position: fixed;
  inset: 0;
  background-color: rgba(0, 0, 0, 0.6);
  z-index: 99;
  backdrop-filter: blur(4px);
}

.mobile-overlay.open {
  display: block;
}

/* ---------- Hero Section ---------- */
.hero {
  position: relative;
  padding: 6rem 0 5rem;
  overflow: hidden;
  background: linear-gradient(135deg, var(--bg-primary) 0%, #111111 50%, var(--bg-primary) 100%);
}

.hero::before {
  content: '';
  position: absolute;
  top: -50%;
  right: -20%;
  width: 600px;
  height: 600px;
  background: radial-gradient(circle, var(--accent-glow) 0%, transparent 70%);
  border-radius: 50%;
  pointer-events: none;
}

.hero-content {
  position: relative;
  z-index: 1;
  max-width: 700px;
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.5rem 1rem;
  background-color: var(--accent-glow);
  border: 1px solid rgba(163, 230, 53, 0.2);
  border-radius: 9999px;
  font-size: 0.875rem;
  color: var(--accent);
  margin-bottom: 1.5rem;
}

.hero-title {
  font-size: 4rem;
  font-weight: 700;
  line-height: 1.1;
  margin-bottom: 1.5rem;
  letter-spacing: -0.03em;
}

.hero-title .accent {
  color: var(--accent);
}

.hero-subtitle {
  font-size: 1.25rem;
  color: var(--text-secondary);
  margin-bottom: 2.5rem;
  line-height: 1.7;
  max-width: 600px;
}

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

.hero-stats {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 2rem;
  margin-top: 4rem;
  padding-top: 3rem;
  border-top: 1px solid var(--border);
}

.hero-stat-item {
  text-align: left;
}

.hero-stat-number {
  font-family: var(--font-display);
  font-size: 2.5rem;
  font-weight: 700;
  color: var(--accent);
  line-height: 1;
  margin-bottom: 0.5rem;
}

.hero-stat-label {
  font-size: 0.875rem;
  color: var(--text-secondary);
}

/* ---------- Stats Section ---------- */
.stats-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1.5rem;
}

.stat-card {
  text-align: center;
  padding: 2rem 1.5rem;
  background-color: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  transition: all var(--transition-normal);
}

.stat-card:hover {
  border-color: var(--accent);
  transform: translateY(-4px);
}

.stat-number {
  font-family: var(--font-display);
  font-size: 3rem;
  font-weight: 700;
  color: var(--accent);
  line-height: 1;
  margin-bottom: 0.75rem;
}

.stat-label {
  font-size: 0.875rem;
  color: var(--text-secondary);
}

/* ---------- Solutions Section ---------- */
.solutions-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1.5rem;
}

.solution-card {
  padding: 2rem 1.5rem;
  background-color: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  transition: all var(--transition-normal);
  cursor: pointer;
}

.solution-card:hover {
  border-color: var(--accent);
  transform: translateY(-4px);
  box-shadow: var(--shadow-glow);
}

.solution-icon {
  width: 3rem;
  height: 3rem;
  background-color: var(--accent-glow);
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--accent);
  font-size: 1.25rem;
  margin-bottom: 1.25rem;
}

.solution-title {
  font-size: 1.125rem;
  font-weight: 600;
  margin-bottom: 0.5rem;
  font-family: var(--font-body);
}

.solution-desc {
  font-size: 0.875rem;
  color: var(--text-secondary);
  line-height: 1.6;
}

/* ---------- Product Categories Section ---------- */
.categories-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.5rem;
}

.category-card {
  position: relative;
  height: 320px;
  border-radius: var(--radius-lg);
  overflow: hidden;
  cursor: pointer;
  transition: all var(--transition-normal);
}

.category-card:hover {
  transform: translateY(-4px);
}

.category-card:hover .category-overlay {
  background: linear-gradient(to top, rgba(0,0,0,0.9) 0%, rgba(0,0,0,0.4) 100%);
}

.category-bg {
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, var(--bg-card) 0%, #1f1f23 100%);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 5rem;
  color: var(--text-muted);
  opacity: 0.3;
}

.category-overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(to top, rgba(0,0,0,0.8) 0%, rgba(0,0,0,0.2) 100%);
  transition: background var(--transition-normal);
}

.category-content {
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  padding: 1.5rem;
  z-index: 1;
}

.category-title {
  font-size: 1.5rem;
  font-weight: 600;
  margin-bottom: 0.25rem;
}

.category-count {
  font-size: 0.875rem;
  color: var(--text-secondary);
  margin-bottom: 1rem;
}

.category-link {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--accent);
  transition: gap var(--transition-fast);
}

.category-card:hover .category-link {
  gap: 0.75rem;
}

/* ---------- Products Grid ---------- */
.products-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.5rem;
}

.product-card {
  background-color: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  overflow: hidden;
  transition: all var(--transition-normal);
}

.product-card:hover {
  border-color: var(--border-light);
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
}

.product-image {
  position: relative;
  height: 220px;
  background: linear-gradient(135deg, #1f1f23 0%, #27272a 100%);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 4rem;
  color: var(--text-muted);
}

.product-badge {
  position: absolute;
  top: 1rem;
  left: 1rem;
}

.product-compare-btn {
  position: absolute;
  top: 1rem;
  right: 1rem;
  width: 2rem;
  height: 2rem;
  background-color: rgba(0, 0, 0, 0.5);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--text-secondary);
  font-size: 0.875rem;
  cursor: pointer;
  transition: all var(--transition-fast);
  backdrop-filter: blur(4px);
}

.product-compare-btn:hover,
.product-compare-btn.active {
  background-color: var(--accent);
  color: var(--bg-primary);
  border-color: var(--accent);
}

.product-info {
  padding: 1.25rem;
}

.product-category {
  font-size: 0.75rem;
  color: var(--accent);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  font-weight: 500;
  margin-bottom: 0.5rem;
}

.product-name {
  font-size: 1.125rem;
  font-weight: 600;
  margin-bottom: 0.5rem;
  font-family: var(--font-body);
  line-height: 1.4;
}

.product-sku {
  font-size: 0.8125rem;
  color: var(--text-muted);
  margin-bottom: 0.75rem;
}

.product-meta {
  display: flex;
  gap: 1rem;
  margin-bottom: 1rem;
  padding-bottom: 1rem;
  border-bottom: 1px solid var(--border);
}

.product-meta-item {
  font-size: 0.8125rem;
  color: var(--text-secondary);
}

.product-meta-item strong {
  color: var(--text-primary);
  font-weight: 500;
}

.product-actions {
  display: flex;
  gap: 0.5rem;
}

.product-actions .btn {
  flex: 1;
}

/* ---------- Page Header ---------- */
.page-header {
  padding: 4rem 0 3rem;
  background: linear-gradient(180deg, var(--bg-secondary) 0%, var(--bg-primary) 100%);
  border-bottom: 1px solid var(--border);
}

.page-header-content {
  max-width: 800px;
}

.breadcrumb {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 0.875rem;
  color: var(--text-muted);
  margin-bottom: 1rem;
}

.breadcrumb a:hover {
  color: var(--accent);
}

.breadcrumb .separator {
  color: var(--border-light);
}

.page-title {
  font-size: 3rem;
  font-weight: 700;
  margin-bottom: 1rem;
  letter-spacing: -0.02em;
}

.page-desc {
  font-size: 1.125rem;
  color: var(--text-secondary);
  line-height: 1.7;
}

/* ---------- Filter Sidebar ---------- */
.products-layout {
  display: grid;
  grid-template-columns: 260px 1fr;
  gap: 2rem;
  padding: 3rem 0;
}

.filter-sidebar {
  position: sticky;
  top: 5rem;
  align-self: start;
}

.filter-section {
  padding: 1.5rem;
  background-color: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  margin-bottom: 1rem;
}

.filter-title {
  font-size: 0.875rem;
  font-weight: 600;
  margin-bottom: 1rem;
  padding-bottom: 0.75rem;
  border-bottom: 1px solid var(--border);
  font-family: var(--font-body);
}

.filter-options {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.filter-option {
  display: flex;
  align-items: center;
  gap: 0.625rem;
  padding: 0.5rem;
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition: background-color var(--transition-fast);
  font-size: 0.875rem;
  color: var(--text-secondary);
}

.filter-option:hover {
  background-color: var(--bg-card-hover);
  color: var(--text-primary);
}

.filter-option input {
  accent-color: var(--accent);
}

.filter-option.active {
  color: var(--accent);
  font-weight: 500;
}

.filter-count {
  margin-left: auto;
  font-size: 0.75rem;
  color: var(--text-muted);
}

/* ---------- Product Detail ---------- */
.product-detail {
  padding: 3rem 0;
}

.product-detail-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 3rem;
  margin-bottom: 3rem;
}

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

.product-main-image {
  width: 100%;
  aspect-ratio: 1;
  background: linear-gradient(135deg, #1f1f23 0%, #27272a 100%);
  border-radius: var(--radius-lg);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 8rem;
  color: var(--text-muted);
  border: 1px solid var(--border);
}

.product-thumbs {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 0.75rem;
}

.product-thumb {
  aspect-ratio: 1;
  background: linear-gradient(135deg, #1f1f23 0%, #27272a 100%);
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 2rem;
  color: var(--text-muted);
  border: 2px solid var(--border);
  cursor: pointer;
  transition: all var(--transition-fast);
}

.product-thumb:hover,
.product-thumb.active {
  border-color: var(--accent);
}

.product-info-main {
  display: flex;
  flex-direction: column;
}

.product-detail-category {
  font-size: 0.875rem;
  color: var(--accent);
  text-transform: uppercase;
  letter-spacing: 0.1em;
  font-weight: 500;
  margin-bottom: 0.75rem;
}

.product-detail-name {
  font-size: 2.25rem;
  font-weight: 700;
  margin-bottom: 0.5rem;
  letter-spacing: -0.02em;
}

.product-detail-sku {
  font-size: 0.9375rem;
  color: var(--text-muted);
  margin-bottom: 1.5rem;
}

.product-specs-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1rem;
  margin-bottom: 2rem;
  padding: 1.5rem;
  background-color: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
}

.product-spec-item {
  display: flex;
  flex-direction: column;
  gap: 0.25rem;
}

.product-spec-label {
  font-size: 0.75rem;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.product-spec-value {
  font-size: 1rem;
  font-weight: 600;
  color: var(--text-primary);
}

.product-desc-section {
  margin-bottom: 2rem;
}

.product-desc-title {
  font-size: 1.125rem;
  font-weight: 600;
  margin-bottom: 0.75rem;
  font-family: var(--font-body);
}

.product-desc-text {
  font-size: 0.9375rem;
  color: var(--text-secondary);
  line-height: 1.7;
}

.product-features {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 0.75rem;
  margin-bottom: 2rem;
}

.product-feature {
  display: flex;
  align-items: center;
  gap: 0.625rem;
  font-size: 0.875rem;
  color: var(--text-secondary);
}

.product-feature i {
  color: var(--accent);
  font-size: 1rem;
}

.product-qty-section {
  display: flex;
  align-items: center;
  gap: 1rem;
  margin-bottom: 1.5rem;
}

.qty-label {
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--text-secondary);
}

.qty-control {
  display: flex;
  align-items: center;
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  overflow: hidden;
}

.qty-btn {
  width: 2.5rem;
  height: 2.5rem;
  display: flex;
  align-items: center;
  justify-content: center;
  background-color: var(--bg-card);
  color: var(--text-secondary);
  transition: all var(--transition-fast);
}

.qty-btn:hover {
  background-color: var(--bg-card-hover);
  color: var(--text-primary);
}

.qty-input {
  width: 4rem;
  height: 2.5rem;
  text-align: center;
  border: none;
  background-color: transparent;
  color: var(--text-primary);
  font-size: 0.9375rem;
  font-weight: 500;
  border-left: 1px solid var(--border);
  border-right: 1px solid var(--border);
}

.product-detail-actions {
  display: flex;
  gap: 0.75rem;
}

.product-detail-actions .btn {
  flex: 1;
  padding: 1rem 1.5rem;
  font-size: 0.9375rem;
}

/* ---------- OEM/ODM Section ---------- */
.oem-comparison {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 2rem;
  margin-bottom: 3rem;
}

.oem-card {
  padding: 2rem;
  background-color: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  position: relative;
  transition: all var(--transition-normal);
}

.oem-card:hover {
  border-color: var(--border-light);
}

.oem-card.popular {
  border-color: var(--accent);
  box-shadow: var(--shadow-glow);
}

.oem-popular-badge {
  position: absolute;
  top: -0.75rem;
  right: 1.5rem;
  padding: 0.375rem 0.875rem;
  background-color: var(--accent);
  color: var(--bg-primary);
  font-size: 0.75rem;
  font-weight: 700;
  border-radius: 9999px;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.oem-card-title {
  font-size: 1.5rem;
  font-weight: 700;
  margin-bottom: 0.5rem;
}

.oem-card-subtitle {
  font-size: 0.9375rem;
  color: var(--text-secondary);
  margin-bottom: 1.5rem;
}

.oem-features {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
  margin-bottom: 1.5rem;
}

.oem-feature {
  display: flex;
  align-items: center;
  gap: 0.625rem;
  font-size: 0.875rem;
  color: var(--text-secondary);
}

.oem-feature i {
  color: var(--accent);
}

.oem-meta {
  display: flex;
  gap: 2rem;
  padding-top: 1.5rem;
  border-top: 1px solid var(--border);
}

.oem-meta-item {
  display: flex;
  flex-direction: column;
  gap: 0.25rem;
}

.oem-meta-label {
  font-size: 0.75rem;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.oem-meta-value {
  font-size: 1.125rem;
  font-weight: 600;
  color: var(--text-primary);
}

/* ---------- Timeline ---------- */
.timeline {
  position: relative;
  max-width: 900px;
  margin: 0 auto;
}

.timeline::before {
  content: '';
  position: absolute;
  left: 50%;
  top: 0;
  bottom: 0;
  width: 2px;
  background-color: var(--border);
  transform: translateX(-50%);
}

.timeline-item {
  position: relative;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 2rem;
  margin-bottom: 2rem;
}

.timeline-item:nth-child(even) .timeline-content {
  grid-column: 2;
  text-align: left;
}

.timeline-item:nth-child(odd) .timeline-content {
  grid-column: 1;
  text-align: right;
}

.timeline-dot {
  position: absolute;
  left: 50%;
  top: 1.5rem;
  width: 1rem;
  height: 1rem;
  background-color: var(--accent);
  border-radius: 50%;
  transform: translateX(-50%);
  box-shadow: 0 0 0 4px var(--bg-primary), 0 0 0 6px var(--accent-glow);
  z-index: 1;
}

.timeline-content {
  padding: 1.5rem;
  background-color: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
}

.timeline-step {
  font-size: 0.75rem;
  font-weight: 700;
  color: var(--accent);
  text-transform: uppercase;
  letter-spacing: 0.1em;
  margin-bottom: 0.5rem;
}

.timeline-title {
  font-size: 1.125rem;
  font-weight: 600;
  margin-bottom: 0.5rem;
  font-family: var(--font-body);
}

.timeline-desc {
  font-size: 0.875rem;
  color: var(--text-secondary);
  line-height: 1.6;
}

/* ---------- Factory Stats ---------- */
.factory-stats {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1.5rem;
  margin-bottom: 3rem;
}

.factory-stat-card {
  padding: 2rem 1.5rem;
  background-color: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  text-align: center;
  transition: all var(--transition-normal);
}

.factory-stat-card:hover {
  border-color: var(--accent);
}

.factory-stat-icon {
  font-size: 2rem;
  color: var(--accent);
  margin-bottom: 1rem;
}

.factory-stat-number {
  font-family: var(--font-display);
  font-size: 2.5rem;
  font-weight: 700;
  color: var(--text-primary);
  line-height: 1;
  margin-bottom: 0.5rem;
}

.factory-stat-label {
  font-size: 0.875rem;
  color: var(--text-secondary);
}

/* ---------- Certifications ---------- */
.certifications-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1.5rem;
}

.cert-card {
  padding: 2rem 1.5rem;
  background-color: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  text-align: center;
  transition: all var(--transition-normal);
}

.cert-card:hover {
  border-color: var(--accent);
  transform: translateY(-4px);
}

.cert-icon {
  font-size: 2.5rem;
  color: var(--accent);
  margin-bottom: 1rem;
}

.cert-name {
  font-size: 1.125rem;
  font-weight: 600;
  margin-bottom: 0.25rem;
  font-family: var(--font-body);
}

.cert-desc {
  font-size: 0.8125rem;
  color: var(--text-secondary);
}

/* ---------- Projects Grid ---------- */
.projects-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.5rem;
}

.project-card {
  background-color: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  overflow: hidden;
  transition: all var(--transition-normal);
  cursor: pointer;
}

.project-card:hover {
  border-color: var(--border-light);
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
}

.project-image {
  height: 200px;
  background: linear-gradient(135deg, #1f1f23 0%, #27272a 100%);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 3rem;
  color: var(--text-muted);
  position: relative;
}

.project-region {
  position: absolute;
  top: 1rem;
  left: 1rem;
}

.project-content {
  padding: 1.5rem;
}

.project-title {
  font-size: 1.125rem;
  font-weight: 600;
  margin-bottom: 0.5rem;
  font-family: var(--font-body);
}

.project-client {
  font-size: 0.875rem;
  color: var(--text-secondary);
  margin-bottom: 1rem;
}

.project-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
}

.project-tag {
  padding: 0.25rem 0.625rem;
  background-color: var(--bg-card-hover);
  border-radius: 9999px;
  font-size: 0.75rem;
  color: var(--text-secondary);
}

/* ---------- Resources Section ---------- */
.resources-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1.5rem;
}

.resource-card {
  display: flex;
  gap: 1.5rem;
  padding: 1.5rem;
  background-color: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  transition: all var(--transition-normal);
  cursor: pointer;
}

.resource-card:hover {
  border-color: var(--accent);
}

.resource-icon {
  flex-shrink: 0;
  width: 3rem;
  height: 3rem;
  background-color: var(--accent-glow);
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--accent);
  font-size: 1.25rem;
}

.resource-content {
  flex: 1;
}

.resource-title {
  font-size: 1rem;
  font-weight: 600;
  margin-bottom: 0.5rem;
  font-family: var(--font-body);
}

.resource-desc {
  font-size: 0.875rem;
  color: var(--text-secondary);
  line-height: 1.6;
  margin-bottom: 0.75rem;
}

.resource-meta {
  display: flex;
  gap: 1rem;
  font-size: 0.75rem;
  color: var(--text-muted);
}

/* ---------- FAQ Section ---------- */
.faq-list {
  max-width: 800px;
  margin: 0 auto;
}

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

.faq-question {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 1.25rem 1.5rem;
  cursor: pointer;
  transition: background-color var(--transition-fast);
}

.faq-question:hover {
  background-color: var(--bg-card-hover);
}

.faq-question-text {
  font-size: 0.9375rem;
  font-weight: 500;
}

.faq-toggle {
  color: var(--text-muted);
  transition: transform var(--transition-fast);
}

.faq-item.open .faq-toggle {
  transform: rotate(180deg);
  color: var(--accent);
}

.faq-answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height var(--transition-normal);
}

.faq-item.open .faq-answer {
  max-height: 500px;
}

.faq-answer-content {
  padding: 0 1.5rem 1.25rem;
  font-size: 0.875rem;
  color: var(--text-secondary);
  line-height: 1.7;
}

/* ---------- About Section ---------- */
.about-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 3rem;
  align-items: center;
}

.about-content h2 {
  font-size: 2.25rem;
  margin-bottom: 1.5rem;
}

.about-content p {
  font-size: 1rem;
  color: var(--text-secondary);
  line-height: 1.8;
  margin-bottom: 1rem;
}

.about-image {
  aspect-ratio: 4/3;
  background: linear-gradient(135deg, #1f1f23 0%, #27272a 100%);
  border-radius: var(--radius-lg);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 6rem;
  color: var(--text-muted);
  border: 1px solid var(--border);
}

.values-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.5rem;
  margin-top: 3rem;
}

.value-card {
  padding: 2rem 1.5rem;
  background-color: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  text-align: center;
  transition: all var(--transition-normal);
}

.value-card:hover {
  border-color: var(--accent);
  transform: translateY(-4px);
}

.value-icon {
  font-size: 2.5rem;
  color: var(--accent);
  margin-bottom: 1rem;
}

.value-title {
  font-size: 1.125rem;
  font-weight: 600;
  margin-bottom: 0.5rem;
  font-family: var(--font-body);
}

.value-desc {
  font-size: 0.875rem;
  color: var(--text-secondary);
  line-height: 1.6;
}

/* ---------- Contact Section ---------- */
.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1.5fr;
  gap: 3rem;
}

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

.contact-info-title {
  font-size: 1.25rem;
  font-weight: 600;
  margin-bottom: 1.5rem;
  font-family: var(--font-body);
}

.contact-info-list {
  display: flex;
  flex-direction: column;
  gap: 1.25rem;
}

.contact-info-item {
  display: flex;
  gap: 1rem;
}

.contact-info-icon {
  flex-shrink: 0;
  width: 2.5rem;
  height: 2.5rem;
  background-color: var(--accent-glow);
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--accent);
}

.contact-info-content {
  flex: 1;
}

.contact-info-label {
  font-size: 0.75rem;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-bottom: 0.25rem;
}

.contact-info-value {
  font-size: 0.9375rem;
  color: var(--text-primary);
}

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

.contact-form-title {
  font-size: 1.25rem;
  font-weight: 600;
  margin-bottom: 0.5rem;
  font-family: var(--font-body);
}

.contact-form-desc {
  font-size: 0.875rem;
  color: var(--text-secondary);
  margin-bottom: 1.5rem;
}

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

.form-group {
  margin-bottom: 1rem;
}

.form-label {
  display: block;
  font-size: 0.875rem;
  font-weight: 500;
  margin-bottom: 0.5rem;
  color: var(--text-secondary);
}

.form-input,
.form-select,
.form-textarea {
  width: 100%;
  padding: 0.75rem 1rem;
  background-color: var(--bg-input);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  color: var(--text-primary);
  font-size: 0.9375rem;
  font-family: inherit;
  transition: border-color var(--transition-fast);
}

.form-input:focus,
.form-select:focus,
.form-textarea:focus {
  outline: none;
  border-color: var(--accent);
}

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

.form-checkbox {
  display: flex;
  align-items: flex-start;
  gap: 0.625rem;
  margin-bottom: 1.5rem;
}

.form-checkbox input {
  margin-top: 0.25rem;
  accent-color: var(--accent);
}

.form-checkbox label {
  font-size: 0.8125rem;
  color: var(--text-secondary);
  line-height: 1.5;
}

/* ---------- RFQ Cart Drawer ---------- */
.rfq-drawer {
  position: fixed;
  top: 0;
  right: 0;
  width: 100%;
  max-width: 420px;
  height: 100vh;
  background-color: var(--bg-secondary);
  border-left: 1px solid var(--border);
  z-index: 100;
  transform: translateX(100%);
  transition: transform var(--transition-normal);
  display: flex;
  flex-direction: column;
}

.rfq-drawer.open {
  transform: translateX(0);
}

.rfq-drawer-overlay {
  position: fixed;
  inset: 0;
  background-color: rgba(0, 0, 0, 0.6);
  z-index: 99;
  opacity: 0;
  visibility: hidden;
  transition: all var(--transition-normal);
  backdrop-filter: blur(4px);
}

.rfq-drawer-overlay.open {
  opacity: 1;
  visibility: visible;
}

.rfq-drawer-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 1.25rem 1.5rem;
  border-bottom: 1px solid var(--border);
}

.rfq-drawer-title {
  display: flex;
  align-items: center;
  gap: 0.625rem;
  font-size: 1rem;
  font-weight: 600;
}

.rfq-drawer-title i {
  color: var(--accent);
}

.rfq-drawer-close {
  width: 2rem;
  height: 2rem;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--text-muted);
  border-radius: var(--radius-sm);
  transition: all var(--transition-fast);
}

.rfq-drawer-close:hover {
  background-color: var(--bg-card);
  color: var(--text-primary);
}

.rfq-drawer-body {
  flex: 1;
  overflow-y: auto;
  padding: 1rem 1.5rem;
}

.rfq-empty {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  height: 100%;
  text-align: center;
  gap: 1rem;
}

.rfq-empty-icon {
  width: 4rem;
  height: 4rem;
  background-color: var(--bg-card);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.5rem;
  color: var(--text-muted);
}

.rfq-empty-text {
  font-size: 0.9375rem;
  font-weight: 500;
}

.rfq-empty-desc {
  font-size: 0.8125rem;
  color: var(--text-secondary);
}

.rfq-items {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

.rfq-item {
  display: flex;
  gap: 1rem;
  padding: 1rem;
  background-color: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
}

.rfq-item-image {
  width: 4rem;
  height: 4rem;
  background: linear-gradient(135deg, #1f1f23 0%, #27272a 100%);
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.5rem;
  color: var(--text-muted);
  flex-shrink: 0;
}

.rfq-item-info {
  flex: 1;
  min-width: 0;
}

.rfq-item-name {
  font-size: 0.875rem;
  font-weight: 500;
  margin-bottom: 0.25rem;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.rfq-item-sku {
  font-size: 0.75rem;
  color: var(--text-muted);
  margin-bottom: 0.5rem;
}

.rfq-item-qty {
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.rfq-qty-btn {
  width: 1.5rem;
  height: 1.5rem;
  display: flex;
  align-items: center;
  justify-content: center;
  background-color: var(--bg-input);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  color: var(--text-secondary);
  font-size: 0.75rem;
  cursor: pointer;
  transition: all var(--transition-fast);
}

.rfq-qty-btn:hover {
  border-color: var(--accent);
  color: var(--accent);
}

.rfq-qty-value {
  font-size: 0.8125rem;
  font-weight: 500;
  min-width: 1.5rem;
  text-align: center;
}

.rfq-item-remove {
  color: var(--text-muted);
  cursor: pointer;
  transition: color var(--transition-fast);
  align-self: flex-start;
}

.rfq-item-remove:hover {
  color: var(--error);
}

.rfq-drawer-footer {
  padding: 1.25rem 1.5rem;
  border-top: 1px solid var(--border);
}

.rfq-summary {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 1rem;
}

.rfq-summary-label {
  font-size: 0.875rem;
  color: var(--text-secondary);
}

.rfq-summary-value {
  font-size: 1rem;
  font-weight: 600;
}

.rfq-drawer-footer .btn {
  width: 100%;
}

/* ---------- Compare Drawer ---------- */
.compare-drawer {
  position: fixed;
  bottom: 0;
  left: 0;
  right: 0;
  background-color: var(--bg-secondary);
  border-top: 1px solid var(--border);
  z-index: 90;
  transform: translateY(100%);
  transition: transform var(--transition-normal);
  padding: 1rem 1.5rem;
}

.compare-drawer.open {
  transform: translateY(0);
}

.compare-content {
  max-width: var(--container-max);
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1.5rem;
}

.compare-items {
  display: flex;
  gap: 0.75rem;
  flex: 1;
}

.compare-item {
  display: flex;
  align-items: center;
  gap: 0.625rem;
  padding: 0.5rem 0.75rem;
  background-color: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
}

.compare-item-image {
  width: 2.5rem;
  height: 2.5rem;
  background: linear-gradient(135deg, #1f1f23 0%, #27272a 100%);
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1rem;
  color: var(--text-muted);
}

.compare-item-name {
  font-size: 0.8125rem;
  font-weight: 500;
  max-width: 120px;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.compare-item-remove {
  color: var(--text-muted);
  cursor: pointer;
  font-size: 0.875rem;
}

.compare-item-remove:hover {
  color: var(--error);
}

.compare-actions {
  display: flex;
  gap: 0.75rem;
}

/* ---------- CTA Section ---------- */
.cta-section {
  background: linear-gradient(135deg, var(--bg-card) 0%, #1a1a1a 100%);
  border: 1px solid var(--border);
  border-radius: var(--radius-xl);
  padding: 3rem;
  text-align: center;
  position: relative;
  overflow: hidden;
}

.cta-section::before {
  content: '';
  position: absolute;
  top: -50%;
  right: -20%;
  width: 400px;
  height: 400px;
  background: radial-gradient(circle, var(--accent-glow) 0%, transparent 70%);
  border-radius: 50%;
  pointer-events: none;
}

.cta-content {
  position: relative;
  z-index: 1;
  max-width: 600px;
  margin: 0 auto;
}

.cta-title {
  font-size: 2rem;
  font-weight: 700;
  margin-bottom: 1rem;
}

.cta-desc {
  font-size: 1rem;
  color: var(--text-secondary);
  margin-bottom: 2rem;
  line-height: 1.7;
}

.cta-actions {
  display: flex;
  gap: 1rem;
  justify-content: center;
  flex-wrap: wrap;
}

/* ---------- Footer ---------- */
.footer {
  background-color: var(--bg-secondary);
  border-top: 1px solid var(--border);
  padding: 4rem 0 2rem;
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: 3rem;
  margin-bottom: 3rem;
}

.footer-brand p {
  font-size: 0.875rem;
  color: var(--text-secondary);
  line-height: 1.7;
  margin-top: 1rem;
  max-width: 320px;
}

.footer-column h4 {
  font-size: 0.875rem;
  font-weight: 600;
  margin-bottom: 1.25rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  font-family: var(--font-body);
}

.footer-links {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

.footer-links a {
  font-size: 0.875rem;
  color: var(--text-secondary);
  transition: color var(--transition-fast);
}

.footer-links a:hover {
  color: var(--accent);
}

.footer-bottom {
  padding-top: 2rem;
  border-top: 1px solid var(--border);
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 1rem;
}

.footer-copyright {
  font-size: 0.8125rem;
  color: var(--text-muted);
}

.footer-legal {
  display: flex;
  gap: 2rem;
}

.footer-legal a {
  font-size: 0.8125rem;
  color: var(--text-muted);
  transition: color var(--transition-fast);
}

.footer-legal a:hover {
  color: var(--text-secondary);
}

/* ---------- 404 Page ---------- */
.not-found {
  min-height: 70vh;
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
  padding: 4rem 0;
}

.not-found-content {
  max-width: 500px;
}

.not-found-code {
  font-family: var(--font-display);
  font-size: 8rem;
  font-weight: 700;
  color: var(--accent);
  line-height: 1;
  margin-bottom: 1rem;
}

.not-found-title {
  font-size: 2rem;
  font-weight: 600;
  margin-bottom: 1rem;
}

.not-found-desc {
  font-size: 1rem;
  color: var(--text-secondary);
  margin-bottom: 2rem;
  line-height: 1.7;
}

.not-found-actions {
  display: flex;
  gap: 1rem;
  justify-content: center;
  flex-wrap: wrap;
}

/* ---------- Toast ---------- */
.toast-container {
  position: fixed;
  top: 1rem;
  right: 1rem;
  z-index: 200;
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.toast {
  padding: 0.875rem 1.25rem;
  background-color: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-lg);
  display: flex;
  align-items: center;
  gap: 0.625rem;
  min-width: 280px;
  animation: slideIn 0.3s ease;
}

@keyframes slideIn {
  from {
    opacity: 0;
    transform: translateX(100%);
  }
  to {
    opacity: 1;
    transform: translateX(0);
  }
}

.toast.success {
  border-color: var(--success);
}

.toast.success i {
  color: var(--success);
}

.toast.error {
  border-color: var(--error);
}

.toast.error i {
  color: var(--error);
}

.toast.info i {
  color: var(--accent);
}

.toast-message {
  font-size: 0.875rem;
  flex: 1;
}

/* ---------- Responsive ---------- */
@media (max-width: 1024px) {
  .hero-title {
    font-size: 3rem;
  }
  
  .hero-stats {
    grid-template-columns: repeat(2, 1fr);
  }
  
  .stats-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  
  .solutions-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  
  .categories-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  
  .products-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  
  .projects-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  
  .factory-stats {
    grid-template-columns: repeat(2, 1fr);
  }
  
  .certifications-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  
  .values-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  
  .footer-grid {
    grid-template-columns: 1fr 1fr;
  }
  
  .products-layout {
    grid-template-columns: 1fr;
  }
  
  .filter-sidebar {
    position: static;
  }
  
  .product-detail-grid {
    grid-template-columns: 1fr;
  }
  
  .about-grid {
    grid-template-columns: 1fr;
  }
  
  .contact-grid {
    grid-template-columns: 1fr;
  }
  
  .oem-comparison {
    grid-template-columns: 1fr;
  }
  
  .timeline::before {
    left: 1rem;
  }
  
  .timeline-item {
    grid-template-columns: 1fr;
    padding-left: 3rem;
  }
  
  .timeline-item:nth-child(even) .timeline-content,
  .timeline-item:nth-child(odd) .timeline-content {
    grid-column: 1;
    text-align: left;
  }
  
  .timeline-dot {
    left: 1rem;
  }
}

@media (max-width: 768px) {
  .nav-menu {
    display: none;
  }
  
  .mobile-menu-btn {
    display: flex;
  }
  
  .hero {
    padding: 4rem 0 3rem;
  }
  
  .hero-title {
    font-size: 2.25rem;
  }
  
  .hero-subtitle {
    font-size: 1rem;
  }
  
  .section-title {
    font-size: 1.875rem;
  }
  
  .page-title {
    font-size: 2rem;
  }
  
  .products-grid {
    grid-template-columns: 1fr;
  }
  
  .projects-grid {
    grid-template-columns: 1fr;
  }
  
  .resources-grid {
    grid-template-columns: 1fr;
  }
  
  .footer-grid {
    grid-template-columns: 1fr;
    gap: 2rem;
  }
  
  .form-row {
    grid-template-columns: 1fr;
  }
  
  .cta-section {
    padding: 2rem 1.5rem;
  }
  
  .cta-title {
    font-size: 1.5rem;
  }
  
  .not-found-code {
    font-size: 5rem;
  }
  
  .compare-content {
    flex-direction: column;
    align-items: stretch;
  }
  
  .compare-items {
    overflow-x: auto;
    padding-bottom: 0.5rem;
  }
}

@media (max-width: 480px) {
  :root {
    --container-padding: 1rem;
  }
  
  .hero-stats {
    grid-template-columns: 1fr 1fr;
    gap: 1rem;
  }
  
  .stats-grid {
    grid-template-columns: 1fr 1fr;
    gap: 1rem;
  }
  
  .solutions-grid {
    grid-template-columns: 1fr;
  }
  
  .categories-grid {
    grid-template-columns: 1fr;
  }
  
  .factory-stats {
    grid-template-columns: 1fr 1fr;
    gap: 1rem;
  }
  
  .certifications-grid {
    grid-template-columns: 1fr 1fr;
    gap: 1rem;
  }
  
  .values-grid {
    grid-template-columns: 1fr;
  }
  
  .product-specs-grid {
    grid-template-columns: 1fr;
  }
  
  .product-features {
    grid-template-columns: 1fr;
  }
  
  .hero-actions {
    flex-direction: column;
  }
  
  .hero-actions .btn {
    width: 100%;
  }
}