/* ============================================
   Corbay Excavator Parts - Main Stylesheet
   B2B Industrial Parts Supplier Website
   ============================================ */

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

:root {
  --primary: #1a56db;
  --primary-dark: #1e40af;
  --primary-light: #dbeafe;
  --accent: #f59e0b;
  --accent-dark: #d97706;
  --dark: #111827;
  --gray-900: #1f2937;
  --gray-800: #374151;
  --gray-600: #6b7280;
  --gray-500: #9ca3af;
  --gray-300: #d1d5db;
  --gray-200: #e5e7eb;
  --gray-100: #f3f4f6;
  --gray-50: #f9fafb;
  --white: #ffffff;
  --shadow-sm: 0 1px 2px rgba(0,0,0,0.05);
  --shadow: 0 4px 6px -1px rgba(0,0,0,0.1);
  --shadow-lg: 0 10px 25px -5px rgba(0,0,0,0.1);
  --radius: 12px;
  --radius-sm: 8px;
  --max-width: 1200px;
  --transition: 0.3s ease;
}

html { scroll-behavior: smooth; }

body {
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
  font-size: 16px;
  line-height: 1.7;
  color: var(--gray-800);
  background: var(--white);
  -webkit-font-smoothing: antialiased;
}

img { max-width: 100%; height: auto; display: block; }
a { color: inherit; text-decoration: none; }

.container {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 24px;
}

/* --- Typography --- */
.section-header {
  text-align: center;
  max-width: 700px;
  margin: 0 auto 64px;
}

.section-title {
  font-size: 2.5rem;
  font-weight: 800;
  color: var(--dark);
  margin-bottom: 16px;
  letter-spacing: -0.02em;
}

.section-desc {
  font-size: 1.125rem;
  color: var(--gray-600);
  line-height: 1.8;
}

/* --- Buttons --- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 12px 28px;
  border-radius: var(--radius-sm);
  font-weight: 600;
  font-size: 0.95rem;
  cursor: pointer;
  transition: all var(--transition);
  border: 2px solid transparent;
}

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

.btn-primary:hover {
  background: var(--primary-dark);
  border-color: var(--primary-dark);
  transform: translateY(-1px);
  box-shadow: var(--shadow-lg);
}

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

.btn-outline:hover {
  background: var(--white);
  color: var(--dark);
}

.btn-lg { padding: 16px 36px; font-size: 1rem; }
.btn-block { width: 100%; }

/* --- Header --- */
.header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  padding: 16px 0;
  transition: all var(--transition);
  background: transparent;
}

.header-scrolled {
  background: var(--white);
  box-shadow: var(--shadow);
  padding: 10px 0;
}

.header-scrolled .nav-link { color: var(--dark); }
.header-scrolled .btn-primary { background: var(--primary); color: white; }

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.logo { flex-shrink: 0; }

.logo-img {
  height: 48px;
  width: auto;
}

.header-scrolled .logo-img { height: 40px; }

.nav {
  display: flex;
  gap: 24px;
}

.nav-link {
  font-weight: 500;
  font-size: 0.95rem;
  color: var(--white);
  opacity: 0.9;
  transition: opacity var(--transition);
}

.header-scrolled .nav-link { color: var(--dark); opacity: 0.8; }

.nav-link:hover { opacity: 1; }

/* --- Mobile nav toggle (hamburger) --- */
.nav-toggle {
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: 44px;
  height: 44px;
  padding: 10px;
  background: none;
  border: none;
  cursor: pointer;
  z-index: 101;
}

.nav-toggle span {
  display: block;
  width: 100%;
  height: 2px;
  background: var(--white);
  border-radius: 2px;
  transition: all 0.3s ease;
}

.header-scrolled .nav-toggle span {
  background: var(--dark);
}

.nav-toggle.active span:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
}

.nav-toggle.active span:nth-child(2) {
  opacity: 0;
}

.nav-toggle.active span:nth-child(3) {
  transform: translateY(-7px) rotate(-45deg);
}

.header.nav-open {
  background: var(--white);
  box-shadow: var(--shadow);
}

.header.nav-open .nav-toggle span {
  background: var(--dark);
}

/* --- Hero --- */
.hero {
  position: relative;
  min-height: 100vh;
  display: flex;
  align-items: center;
  background: linear-gradient(135deg, #1e3a5f 0%, #1a56db 40%, #2563eb 100%);
  color: var(--white);
  overflow: hidden;
}

.hero::before {
  content: '';
  position: absolute;
  top: -50%;
  right: -20%;
  width: 800px;
  height: 800px;
  background: radial-gradient(circle, rgba(255,255,255,0.08) 0%, transparent 70%);
  border-radius: 50%;
}

.hero::after {
  content: '';
  position: absolute;
  bottom: -30%;
  left: -10%;
  width: 600px;
  height: 600px;
  background: radial-gradient(circle, rgba(245,158,11,0.08) 0%, transparent 70%);
  border-radius: 50%;
}

.hero-content {
  position: relative;
  z-index: 1;
  max-width: 750px;
  padding: 120px 0 80px;
}

.hero-subtitle {
  font-size: 0.875rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.15em;
  color: var(--accent);
  margin-bottom: 16px;
}

.hero-title {
  font-size: 3.5rem;
  font-weight: 800;
  line-height: 1.15;
  letter-spacing: -0.03em;
  margin-bottom: 24px;
}

.hero-desc {
  font-size: 1.15rem;
  line-height: 1.8;
  opacity: 0.9;
  margin-bottom: 40px;
}

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

.hero-brandnote {
  font-size: 0.95rem;
  line-height: 1.75;
  opacity: 0.72;
  max-width: 640px;
  margin: -24px 0 40px;
}
.hero-brandnote strong { color: var(--accent); opacity: 1; }
.hero-brandnote a { color: #fff; text-decoration: underline; opacity: 0.9; }
.hero-brandnote a:hover { opacity: 1; }

.hero-btns {
  display: flex;
  gap: 16px;
  margin-bottom: 64px;
}

.hero-stats {
  display: flex;
  gap: 48px;
}

.stat { text-align: center; }

.stat-num {
  display: block;
  font-size: 2.5rem;
  font-weight: 800;
  color: var(--accent);
  line-height: 1.2;
}

.stat-label {
  font-size: 0.875rem;
  opacity: 0.8;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

/* --- Partners Banner --- */
.partners-banner {
  background: var(--dark);
  color: var(--white);
  padding: 32px 0;
  text-align: center;
}

.partners-label {
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.15em;
  color: var(--accent);
  margin-bottom: 16px;
  font-weight: 600;
}

.partners-logos {
  display: flex;
  justify-content: center;
  align-items: center;
  gap: 56px;
  flex-wrap: wrap;
}

.partner-logo-item {
  display: flex;
  align-items: center;
  justify-content: center;
  height: 72px;
  min-width: 150px;
  padding: 8px 16px;
  background: #ffffff;
  border: 1px solid var(--gray-200);
  border-radius: 8px;
  opacity: 0.95;
  transition: all var(--transition);
}

.partner-logo-item:hover {
  opacity: 1;
  border-color: var(--primary);
  transform: translateY(-2px);
  box-shadow: var(--shadow);
}

.partner-logo-item img {
  max-height: 56px;
  width: auto;
  max-width: 100%;
  object-fit: contain;
}

/* --- Products Section --- */
.products {
  padding: 100px 0;
  background: var(--white);
}

.product-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 28px;
  margin-bottom: 48px;
}

.product-card {
  background: var(--gray-50);
  border: 1px solid var(--gray-200);
  border-radius: var(--radius);
  padding: 40px 36px;
  transition: all var(--transition);
}

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

.product-icon {
  width: 56px;
  height: 56px;
  color: var(--primary);
  margin-bottom: 20px;
}

.product-img {
  width: 100%;
  height: 200px;
  background: var(--white);
  border-radius: var(--radius-sm);
  margin-bottom: 20px;
  overflow: hidden;
  display: flex;
  align-items: center;
  justify-content: center;
}

.product-img img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.4s ease;
}

.product-card:hover .product-img img {
  transform: scale(1.05);
}

.product-title {
  font-size: 1.35rem;
  font-weight: 700;
  color: var(--dark);
  margin-bottom: 16px;
}

.product-list {
  list-style: none;
  display: grid;
  gap: 8px;
}

.product-list li {
  font-size: 0.9rem;
  color: var(--gray-600);
  padding-left: 18px;
  position: relative;
}

.product-list li::before {
  content: '>';
  position: absolute;
  left: 0;
  color: var(--primary);
  font-weight: 700;
  font-size: 0.75rem;
}

.product-brands {
  background: linear-gradient(135deg, var(--primary-light), #eff6ff);
  border-radius: var(--radius);
  padding: 32px 36px;
  text-align: center;
}

.product-brands-title {
  font-size: 1rem;
  color: var(--primary-dark);
  margin-bottom: 16px;
  font-weight: 600;
}

.brand-tags {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 10px;
}

.brand-tag {
  display: inline-block;
  padding: 6px 16px;
  background: var(--white);
  border: 1px solid var(--gray-200);
  border-radius: 20px;
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--gray-700);
  transition: all var(--transition);
}

.brand-tag:first-child {
  background: var(--primary);
  color: var(--white);
  border-color: var(--primary);
}

.brand-tag:hover {
  border-color: var(--primary);
  color: var(--primary);
}

/* --- Product Category Sections --- */
.product-category {
  margin-bottom: 48px;
}

.cat-title {
  font-size: 1.4rem;
  font-weight: 700;
  color: var(--dark);
  margin-bottom: 24px;
  padding-bottom: 12px;
  border-bottom: 3px solid var(--primary);
  display: flex;
  align-items: center;
}

.cat-title span {
  background: var(--primary);
  color: var(--white);
  padding: 6px 20px;
  border-radius: 4px 4px 0 0;
  font-size: 1rem;
}

.product-grid-3 {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

/* --- Hot Product Card --- */
.hot-product-card {
  background: var(--white);
  border: 1px solid var(--gray-200);
  border-radius: var(--radius);
  overflow: hidden;
  transition: all var(--transition);
  box-shadow: var(--shadow-sm);
  cursor: pointer;
}

.hot-product-card:hover {
  box-shadow: var(--shadow-lg);
  transform: translateY(-3px);
  border-color: var(--primary-light);
}

.hot-product-img {
  width: 100%;
  aspect-ratio: 1/1;
  overflow: hidden;
  background: #f8fafc;
  padding: 18px;
  display: flex;
  align-items: center;
  justify-content: center;
}

.hot-product-img img {
  max-width: 100%;
  max-height: 100%;
  width: auto;
  height: auto;
  object-fit: contain;
  transition: transform 0.4s ease;
}

.hot-product-card:hover .hot-product-img img {
  transform: scale(1.05);
}

.hot-product-info {
  padding: 20px 24px 24px;
}

.hot-product-info h4 {
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--dark);
  margin-bottom: 8px;
  line-height: 1.35;
}

.hp-pn {
  font-size: 0.8rem;
  color: var(--primary);
  font-weight: 600;
  font-family: 'Courier New', monospace;
  margin-bottom: 8px;
  word-break: break-all;
}

.hp-desc {
  font-size: 0.88rem;
  color: var(--gray-600);
  line-height: 1.6;
  margin-bottom: 10px;
}

.hp-models {
  font-size: 0.8rem;
  color: var(--gray-500);
  line-height: 1.5;
  margin-bottom: 16px;
}

.hp-models strong {
  color: var(--gray-700);
}

.btn-sm {
  padding: 8px 20px;
  font-size: 0.85rem;
}

/* --- Why Us Section --- */
.why-us {
  padding: 100px 0;
  background: var(--gray-50);
}

.features-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 28px;
}

.feature-card {
  background: var(--white);
  border: 1px solid var(--gray-200);
  border-radius: var(--radius);
  padding: 36px;
  position: relative;
  overflow: hidden;
  transition: all var(--transition);
}

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

.feature-num {
  font-size: 3.5rem;
  font-weight: 800;
  color: var(--primary-light);
  position: absolute;
  top: 12px;
  right: 20px;
  line-height: 1;
  opacity: 0.6;
}

.feature-title {
  font-size: 1.2rem;
  font-weight: 700;
  color: var(--dark);
  margin-bottom: 12px;
  position: relative;
  z-index: 1;
}

.feature-desc {
  font-size: 0.95rem;
  color: var(--gray-600);
  position: relative;
  z-index: 1;
  line-height: 1.7;
}

/* --- About Section --- */
.about {
  padding: 100px 0;
  background: var(--white);
}

.about-grid {
  display: grid;
  grid-template-columns: 1fr 280px;
  gap: 64px;
  align-items: start;
}

.about-label {
  font-size: 0.8rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.15em;
  color: var(--primary);
  margin-bottom: 12px;
}

.about-title {
  font-size: 2.2rem;
  font-weight: 800;
  color: var(--dark);
  line-height: 1.25;
  margin-bottom: 24px;
  letter-spacing: -0.02em;
}

.about-text {
  color: var(--gray-600);
  margin-bottom: 16px;
  font-size: 1.05rem;
  line-height: 1.8;
}

.about-highlights {
  margin-top: 28px;
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.highlight {
  display: flex;
  align-items: center;
  gap: 12px;
  font-weight: 600;
  color: var(--gray-800);
}

.highlight-icon {
  width: 24px;
  height: 24px;
  color: #10b981;
  flex-shrink: 0;
}

.about-stats-panel {
  background: linear-gradient(135deg, var(--primary), var(--primary-dark));
  border-radius: var(--radius);
  padding: 40px 32px;
  color: var(--white);
}

.stat-item {
  text-align: center;
  padding: 20px 0;
  border-bottom: 1px solid rgba(255,255,255,0.15);
}

.stat-item:last-child { border-bottom: none; }

.stat-item-num {
  display: block;
  font-size: 2.2rem;
  font-weight: 800;
  color: var(--accent);
  line-height: 1.2;
}

.stat-item-label {
  font-size: 0.85rem;
  opacity: 0.9;
}

/* --- Authorized Section --- */
.auth-section {
  padding: 100px 0;
  background: var(--gray-50);
}

.auth-cards {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(215px, 1fr));
  gap: 24px;
}

.auth-card {
  background: var(--white);
  border: 1px solid var(--gray-200);
  border-radius: var(--radius);
  padding: 32px 24px;
  text-align: center;
  transition: all var(--transition);
  display: flex;
  flex-direction: column;
  align-items: center;
}

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

.auth-logo {
  height: 64px;
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 20px;
}

.auth-logo-text {
  font-size: 1.05rem;
  font-weight: 800;
  letter-spacing: 0.2em;
  color: var(--dark);
}

.auth-logo img {
  max-height: 56px;
  max-width: 180px;
  object-fit: contain;
}

.auth-brand {
  font-size: 1.25rem;
  font-weight: 800;
  letter-spacing: 0.05em;
  color: var(--dark);
  margin-bottom: 16px;
}

.auth-brand span {
  font-size: 0.65rem;
  font-weight: 400;
  color: var(--gray-500);
  display: block;
  letter-spacing: 0.1em;
}

.auth-desc {
  font-size: 0.92rem;
  color: var(--gray-600);
  line-height: 1.7;
}

/* --- Certificates Section --- */
.certificates {
  padding: 80px 0;
  background: var(--white);
}

.cert-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
}

.cert-item {
  border-radius: var(--radius);
  overflow: hidden;
  box-shadow: var(--shadow);
  background: #f8fafc;
  transition: all var(--transition);
  height: 280px;
  padding: 16px;
  display: flex;
  align-items: center;
  justify-content: center;
}

.cert-item:hover {
  transform: translateY(-3px);
  box-shadow: var(--shadow-lg);
}

.cert-item img {
  max-width: 100%;
  max-height: 100%;
  width: auto;
  height: auto;
  object-fit: contain;
}

.cert-wide {
  grid-column: span 2;
  height: 320px;
}

/* --- Exhibition Section --- */
.exhibition {
  padding: 100px 0;
  background: linear-gradient(135deg, var(--primary-dark) 0%, var(--primary) 100%);
  color: var(--white);
}

.exhibition-grid {
  display: grid;
  grid-template-columns: 2fr 1fr;
  gap: 60px;
  align-items: center;
}

.exhibition-label {
  font-size: 0.85rem;
  text-transform: uppercase;
  letter-spacing: 0.2em;
  color: var(--accent);
  font-weight: 600;
  margin-bottom: 16px;
}

.exhibition-title {
  font-size: 2.75rem;
  font-weight: 800;
  margin-bottom: 24px;
  letter-spacing: -0.02em;
  line-height: 1.1;
}

.exhibition-text {
  font-size: 1.05rem;
  line-height: 1.8;
  opacity: 0.95;
  margin-bottom: 32px;
}

.exhibition-text strong {
  color: var(--accent);
}

.exhibition-details {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 20px;
  margin-bottom: 32px;
}

.exhibition-item {
  background: rgba(255,255,255,0.1);
  padding: 16px 20px;
  border-radius: var(--radius-sm);
  backdrop-filter: blur(10px);
}

.exhibition-item strong {
  display: block;
  font-size: 0.7rem;
  text-transform: uppercase;
  letter-spacing: 0.15em;
  color: var(--accent);
  margin-bottom: 6px;
  font-weight: 600;
}

.exhibition-item span {
  font-size: 0.95rem;
  line-height: 1.5;
}

.exhibition-badge {
  display: flex;
  justify-content: center;
  align-items: center;
}

.badge-inner {
  width: 260px;
  height: 260px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--accent) 0%, var(--accent-dark) 100%);
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  text-align: center;
  box-shadow: 0 20px 60px rgba(0,0,0,0.3);
  border: 6px solid rgba(255,255,255,0.2);
  animation: pulse-badge 3s ease-in-out infinite;
}

@keyframes pulse-badge {
  0%, 100% { transform: scale(1); }
  50% { transform: scale(1.05); }
}

.badge-year {
  font-size: 1.5rem;
  font-weight: 700;
  opacity: 0.9;
  letter-spacing: 0.1em;
}

.badge-name {
  font-size: 2.5rem;
  font-weight: 900;
  line-height: 1;
  margin: 8px 0;
  letter-spacing: -0.02em;
}

.badge-city {
  font-size: 1rem;
  opacity: 0.9;
  letter-spacing: 0.2em;
  text-transform: uppercase;
}

/* --- Exhibitions Section --- */
.exhibitions {
  padding: 100px 0;
  background: var(--gray-50);
}

.exhibition-cards {
  display: flex;
  flex-direction: column;
  gap: 24px;
  max-width: 860px;
  margin: 0 auto;
}

.expo-card {
  display: flex;
  gap: 28px;
  background: var(--white);
  border: 1px solid var(--gray-200);
  border-radius: var(--radius);
  padding: 28px 32px;
  transition: all var(--transition);
  align-items: flex-start;
}

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

.expo-year {
  font-size: 1.8rem;
  font-weight: 800;
  color: var(--primary);
  min-width: 80px;
  text-align: center;
  padding-top: 4px;
  flex-shrink: 0;
}

.expo-content h3 {
  font-size: 1.15rem;
  font-weight: 700;
  color: var(--dark);
  margin-bottom: 6px;
}

.expo-date {
  font-size: 0.82rem;
  color: var(--accent-dark);
  font-weight: 600;
  margin-bottom: 10px;
}

.expo-content p {
  font-size: 0.92rem;
  color: var(--gray-600);
  line-height: 1.65;
  margin-bottom: 14px;
}

/* --- Global Business Section --- */
.global {
  padding: 100px 0;
  background: var(--white);
}

.global-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
  margin-bottom: 48px;
}

.global-card {
  background: var(--gray-50);
  border: 1px solid var(--gray-200);
  border-radius: var(--radius);
  padding: 32px 24px;
  text-align: center;
  transition: all var(--transition);
}

.global-card:hover {
  box-shadow: var(--shadow-lg);
  transform: translateY(-3px);
  border-color: var(--primary-light);
}

.global-flag {
  width: 56px;
  height: 56px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--primary), var(--primary-dark));
  color: var(--white);
  font-size: 1.1rem;
  font-weight: 800;
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto 16px;
  letter-spacing: 0.05em;
}

.global-card h3 {
  font-size: 1.15rem;
  font-weight: 700;
  color: var(--dark);
  margin-bottom: 6px;
}

.global-since {
  font-size: 0.8rem;
  color: var(--accent-dark);
  font-weight: 600;
  margin-bottom: 12px;
}

.global-card p {
  font-size: 0.88rem;
  color: var(--gray-600);
  line-height: 1.6;
}

.global-cta {
  text-align: center;
  background: linear-gradient(135deg, var(--primary), var(--primary-dark));
  border-radius: var(--radius);
  padding: 40px;
  color: var(--white);
}

.global-cta p {
  font-size: 1.15rem;
  margin-bottom: 20px;
  opacity: 0.95;
}

.global-cta strong {
  color: var(--accent);
}

/* --- Contact Section --- */
.contact {
  padding: 100px 0;
  background: var(--white);
}

.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 64px;
}

.contact-label {
  font-size: 0.8rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.15em;
  color: var(--primary);
  margin-bottom: 12px;
}

.contact-title {
  font-size: 2.2rem;
  font-weight: 800;
  color: var(--dark);
  line-height: 1.25;
  margin-bottom: 16px;
  letter-spacing: -0.02em;
}

.contact-desc {
  color: var(--gray-600);
  margin-bottom: 36px;
  font-size: 1.05rem;
}

.contact-details {
  display: flex;
  flex-direction: column;
  gap: 20px;
}

.contact-item {
  display: flex;
  align-items: flex-start;
  gap: 14px;
}

.contact-icon {
  width: 24px;
  height: 24px;
  color: var(--primary);
  margin-top: 2px;
  flex-shrink: 0;
}

.contact-item strong {
  display: block;
  font-size: 0.9rem;
  color: var(--dark);
  margin-bottom: 2px;
}

.contact-item span {
  font-size: 0.95rem;
  color: var(--gray-600);
}

/* --- Contact Form --- */
.contact-form-wrapper {
  background: var(--gray-50);
  border: 1px solid var(--gray-200);
  border-radius: var(--radius);
  padding: 40px;
}

.form-group { margin-bottom: 20px; }

.form-group label {
  display: block;
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--dark);
  margin-bottom: 6px;
}

.form-group input,
.form-group textarea {
  width: 100%;
  padding: 12px 16px;
  border: 1px solid var(--gray-300);
  border-radius: var(--radius-sm);
  font-size: 0.95rem;
  font-family: inherit;
  color: var(--dark);
  background: var(--white);
  transition: all var(--transition);
}

.form-group input:focus,
.form-group textarea:focus {
  outline: none;
  border-color: var(--primary);
  box-shadow: 0 0 0 3px var(--primary-light);
}

.form-group textarea { resize: vertical; }

.form-note {
  font-size: 0.8rem;
  color: var(--gray-500);
  margin-top: 12px;
  text-align: center;
}

/* --- Footer --- */
.footer {
  background: var(--dark);
  color: var(--gray-300);
  padding: 64px 0 32px;
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: 48px;
}

.footer-brand { max-width: 340px; }

.footer-logo {
  height: 40px;
  width: auto;
  margin-bottom: 16px;
  filter: brightness(0) invert(1);
  opacity: 0.9;
}

.footer-desc {
  font-size: 0.9rem;
  line-height: 1.7;
  margin-bottom: 20px;
  opacity: 0.7;
}

.footer-social {
  display: flex;
  gap: 12px;
}

.social-link {
  width: 36px;
  height: 36px;
  display: flex;
  align-items: center;
  justify-content: center;
  border: 1px solid rgba(255,255,255,0.15);
  border-radius: 50%;
  font-size: 0.7rem;
  font-weight: 700;
  color: var(--gray-300);
  transition: all var(--transition);
}

.social-link:hover { background: var(--primary); border-color: var(--primary); color: white; }

.footer-links h4 {
  font-size: 0.9rem;
  font-weight: 700;
  color: var(--white);
  margin-bottom: 16px;
}

.footer-links a {
  display: block;
  font-size: 0.9rem;
  opacity: 0.7;
  margin-bottom: 10px;
  transition: opacity var(--transition);
}

.footer-links a:hover { opacity: 1; color: var(--accent); }

.footer-links p {
  font-size: 0.9rem;
  opacity: 0.7;
  margin-bottom: 10px;
}

/* --- Footer social links --- */
.footer-social {
  margin-top: 40px;
  padding-top: 24px;
  border-top: 1px solid rgba(255,255,255,0.08);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-wrap: wrap;
  gap: 12px 18px;
}
.footer-social-label {
  font-size: 0.85rem;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  opacity: 0.7;
}
.footer-social-links { display: flex; gap: 10px; flex-wrap: wrap; }
.social-link {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 38px;
  height: 38px;
  border-radius: 50%;
  background: rgba(255,255,255,0.08);
  color: #fff;
  transition: background 0.2s ease, transform 0.2s ease, color 0.2s ease;
}
.social-link:hover { transform: translateY(-3px); color: #fff; }
.social-link svg { display: block; }
.social-link[aria-label^="Facebook"]:hover { background: #1877F2; }
.social-link[aria-label^="YouTube"]:hover { background: #FF0000; }
.social-link[aria-label^="Instagram"]:hover { background: linear-gradient(45deg,#F58529,#DD2A7B,#8134AF); }
.social-link[aria-label^="WhatsApp"]:hover { background: #25D366; }

.footer-bottom {
  margin-top: 48px;
  padding-top: 24px;
  border-top: 1px solid rgba(255,255,255,0.08);
  text-align: center;
  font-size: 0.85rem;
  opacity: 0.5;
}

.footer-shenyue { margin-top: 8px; font-size: 0.8rem; max-width: 880px; margin-left: auto; margin-right: auto; line-height: 1.6; }

/* --- Blog Article --- */
.blog-article { padding: 48px 0 80px; }
.blog-post { max-width: 860px; margin: 0 auto; }
.blog-meta {
  font-size: 0.85rem;
  color: var(--gray-500);
  text-transform: uppercase;
  letter-spacing: 0.06em;
  margin-bottom: 12px;
}
.blog-title {
  font-size: 2.2rem;
  font-weight: 800;
  color: var(--dark);
  line-height: 1.25;
  margin-bottom: 24px;
}
.blog-lead {
  font-size: 1.15rem;
  color: var(--gray-700);
  line-height: 1.75;
  border-left: 4px solid var(--accent);
  padding-left: 20px;
  margin-bottom: 24px;
}
.blog-text {
  font-size: 1.02rem;
  color: var(--gray-700);
  line-height: 1.85;
  margin-bottom: 20px;
}
.blog-h3 {
  font-size: 1.45rem;
  font-weight: 700;
  color: var(--dark);
  margin: 40px 0 16px;
}
.blog-timeline {
  display: flex;
  flex-direction: column;
  gap: 12px;
  margin: 24px 0 8px;
  border-left: 2px solid var(--gray-200);
  padding-left: 24px;
}
.blog-tl-item { display: flex; gap: 16px; align-items: baseline; }
.blog-tl-year {
  flex-shrink: 0;
  width: 96px;
  font-weight: 800;
  color: var(--accent);
  font-size: 0.95rem;
}
.blog-tl-text { color: var(--gray-700); font-size: 0.98rem; }
.blog-cat-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
  margin: 24px 0 8px;
}
.blog-cat {
  background: var(--gray-100);
  border-radius: var(--radius-sm);
  overflow: hidden;
  box-shadow: var(--shadow-sm);
  transition: transform var(--transition), box-shadow var(--transition);
}
.blog-cat:hover { transform: translateY(-3px); box-shadow: var(--shadow-lg); }
.blog-cat img { width: 100%; aspect-ratio: 4/3; object-fit: cover; display: block; }
.blog-cat h4 {
  font-size: 0.95rem;
  font-weight: 700;
  color: var(--dark);
  margin: 12px 14px 4px;
}
.blog-cat p {
  font-size: 0.82rem;
  color: var(--gray-500);
  line-height: 1.5;
  margin: 0 14px 14px;
}
.blog-points {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 14px;
  margin: 24px 0 8px;
}
.blog-point {
  background: var(--gray-100);
  border-radius: var(--radius-sm);
  padding: 16px 18px;
  font-size: 0.95rem;
  color: var(--gray-700);
  line-height: 1.6;
}
.blog-point strong { color: var(--dark); display: block; margin-bottom: 4px; }
.blog-cta {
  display: flex;
  gap: 16px;
  flex-wrap: wrap;
  margin: 32px 0 24px;
}
.blog-note {
  font-size: 0.85rem;
  color: var(--gray-500);
  border-top: 1px solid var(--gray-200);
  padding-top: 20px;
}
@media (max-width: 768px) {
  .blog-title { font-size: 1.7rem; }
  .blog-cat-grid { grid-template-columns: repeat(2, 1fr); gap: 14px; }
  .blog-points { grid-template-columns: 1fr; }
  .blog-tl-year { width: 80px; }
}
@media (max-width: 480px) {
  .blog-cat-grid { grid-template-columns: 1fr; }
}

/* --- Trade show post (bauma CHINA 2026) --- */
.bauma-facts {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 14px;
  margin: 26px 0 8px;
}
.bauma-fact {
  background: var(--gray-100);
  border-radius: var(--radius-sm);
  padding: 16px 18px;
}
.bauma-fact-l {
  display: block;
  font-size: 0.7rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.09em;
  color: var(--gray-500);
  margin-bottom: 6px;
}
.bauma-fact-v {
  display: block;
  font-size: 1.08rem;
  font-weight: 800;
  color: var(--dark);
  line-height: 1.3;
}
.bauma-fact-n {
  display: block;
  font-size: 0.84rem;
  color: var(--gray-500);
  line-height: 1.55;
  margin-top: 6px;
}
.bauma-venues {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 18px;
  margin: 24px 0 8px;
}
.bauma-venue {
  background: #fff;
  border: 1px solid var(--gray-200);
  border-left: 4px solid var(--accent);
  border-radius: var(--radius-sm);
  padding: 18px 20px;
}
.bauma-venue h4 {
  font-size: 1rem;
  font-weight: 700;
  color: var(--dark);
  line-height: 1.4;
  margin-bottom: 6px;
}
.bauma-venue-date {
  font-size: 0.82rem;
  font-weight: 700;
  color: var(--accent);
  margin-bottom: 10px;
}
.bauma-venue p:last-child {
  font-size: 0.92rem;
  color: var(--gray-700);
  line-height: 1.65;
  margin: 0;
}
.bauma-faqs { margin: 22px 0 8px; }
.bauma-faq { border-bottom: 1px solid var(--gray-200); padding: 16px 0; }
.bauma-faq:first-child { border-top: 1px solid var(--gray-200); }
.bauma-q {
  font-size: 1.05rem;
  font-weight: 700;
  color: var(--dark);
  line-height: 1.45;
  margin-bottom: 8px;
}
.bauma-a {
  font-size: 0.98rem;
  color: var(--gray-700);
  line-height: 1.75;
  margin: 0;
}
/* Blog index cards */
.blog-index { padding: 40px 0 8px; }
.blog-index-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 20px;
  margin-top: 20px;
}
.blog-card {
  display: block;
  background: var(--gray-100);
  border-radius: var(--radius-sm);
  padding: 20px 22px;
  text-decoration: none;
  transition: transform var(--transition), box-shadow var(--transition);
}
.blog-card:hover { transform: translateY(-3px); box-shadow: var(--shadow-lg); }
.blog-card .blog-card-tag {
  display: inline-block;
  font-size: 0.7rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: #fff;
  background: var(--accent);
  border-radius: 999px;
  padding: 3px 10px;
  margin-bottom: 10px;
}
.blog-card h3 {
  font-size: 1.12rem;
  font-weight: 700;
  color: var(--dark);
  line-height: 1.45;
  margin-bottom: 8px;
}
.blog-card p {
  font-size: 0.92rem;
  color: var(--gray-700);
  line-height: 1.65;
  margin: 0;
}
.blog-card .blog-card-more {
  display: inline-block;
  margin-top: 12px;
  font-size: 0.88rem;
  font-weight: 700;
  color: var(--accent);
}
@media (max-width: 768px) {
  .bauma-facts, .bauma-venues, .blog-index-grid { grid-template-columns: 1fr; }
}

/* --- Clickable Images --- */
.hot-product-img,
.cert-item,
.auth-logo {
  cursor: pointer;
}

/* --- Lightbox --- */
.lightbox {
  display: none;
  position: fixed;
  z-index: 9999;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: rgba(0,0,0,0.92);
  align-items: center;
  justify-content: center;
  animation: fadeIn 0.25s ease;
}

.lightbox.active {
  display: flex;
}

@keyframes fadeIn {
  from { opacity: 0; }
  to { opacity: 1; }
}

.lightbox-img {
  max-width: 90vw;
  max-height: 90vh;
  object-fit: contain;
  border-radius: 4px;
  box-shadow: 0 20px 60px rgba(0,0,0,0.5);
  animation: zoomIn 0.3s ease;
}

@keyframes zoomIn {
  from { transform: scale(0.85); opacity: 0; }
  to { transform: scale(1); opacity: 1; }
}

.lightbox-close {
  position: absolute;
  top: 20px;
  right: 30px;
  width: 44px;
  height: 44px;
  background: rgba(255,255,255,0.12);
  border: none;
  border-radius: 50%;
  color: #fff;
  font-size: 1.5rem;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: background 0.2s;
  z-index: 2;
}

.lightbox-close:hover {
  background: rgba(255,255,255,0.25);
}

.lightbox-prev,
.lightbox-next {
  position: absolute;
  top: 50%;
  transform: translateY(-50%);
  width: 48px;
  height: 48px;
  background: rgba(255,255,255,0.12);
  border: none;
  border-radius: 50%;
  color: #fff;
  font-size: 1.5rem;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: background 0.2s;
  z-index: 2;
}

.lightbox-prev { left: 20px; }
.lightbox-next { right: 20px; }

.lightbox-prev:hover,
.lightbox-next:hover {
  background: rgba(255,255,255,0.25);
}

.lightbox-caption {
  position: absolute;
  bottom: 24px;
  left: 50%;
  transform: translateX(-50%);
  color: rgba(255,255,255,0.7);
  font-size: 0.9rem;
  text-align: center;
  max-width: 600px;
}

/* --- Responsive --- */
@media (max-width: 1024px) {
  .nav { gap: 16px; }
  .btn-header-cta { display: none; }
  .features-grid { grid-template-columns: repeat(2, 1fr); }
  .footer-grid { grid-template-columns: 1fr 1fr; }
  .auth-cards { grid-template-columns: repeat(2, 1fr); }
  .cert-grid { grid-template-columns: repeat(2, 1fr); }
  .product-grid-3 { grid-template-columns: repeat(2, 1fr); }
  .global-grid { grid-template-columns: repeat(2, 1fr); }
  .catalog-grid { grid-template-columns: repeat(3, 1fr); }
  .cert-wide { grid-column: span 2; }
}

/* ── Catalog Page ── */
.catalog-cat-title {
  margin: 32px 0 14px;
  font-size: 1.3rem;
  color: var(--primary);
  padding-bottom: 8px;
  border-bottom: 2px solid var(--gray-200);
}
.catalog-cat-title .catalog-count {
  color: var(--gray-500);
  font-size: 0.95rem;
  font-weight: 400;
  margin-left: 6px;
}
.catalog-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 18px;
  margin-bottom: 24px;
}
.catalog-card {
  background: #fff;
  border: 1px solid var(--gray-200);
  border-radius: var(--radius);
  overflow: hidden;
  transition: all var(--transition);
  text-decoration: none;
  color: var(--text);
  display: flex;
  flex-direction: column;
  position: relative;
}
.catalog-link {
  text-decoration: none;
  color: inherit;
  display: flex;
  flex-direction: column;
  flex: 1;
}
.catalog-quote {
  width: 100%;
  border: none;
  border-top: 1px solid var(--gray-200);
  background: var(--gray-50, #f8fafc);
  color: var(--primary);
  font-size: 0.86rem;
  font-weight: 600;
  padding: 9px 10px;
  cursor: pointer;
  transition: all var(--transition);
  font-family: inherit;
}
.catalog-quote:hover {
  background: var(--primary);
  color: #fff;
}
.catalog-card:hover {
  transform: translateY(-3px);
  box-shadow: var(--shadow-lg);
  border-color: var(--primary);
}
.catalog-img {
  background: #f8fafc;
  aspect-ratio: 1/1;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 12px;
  border-bottom: 1px solid var(--gray-200);
  position: relative;
}
.hot-badge {
  position: absolute;
  top: 10px;
  left: 10px;
  background: #dc2626;
  color: #fff;
  font-size: 0.68rem;
  font-weight: 700;
  letter-spacing: 0.5px;
  padding: 3px 8px;
  border-radius: 4px;
  box-shadow: 0 2px 6px rgba(0,0,0,0.18);
}
.catalog-card.hot {
  border-color: #fca5a5;
}
.catalog-img img {
  max-width: 100%;
  max-height: 100%;
  object-fit: contain;
}
.catalog-info {
  padding: 12px 14px;
  flex: 1;
  display: flex;
  flex-direction: column;
  gap: 4px;
}
.catalog-pn {
  font-family: monospace;
  font-size: 0.82rem;
  font-weight: 600;
  color: var(--primary);
  word-break: break-all;
}
.catalog-name-en {
  font-size: 0.92rem;
  font-weight: 600;
  color: var(--text);
  line-height: 1.3;
}
.catalog-name-cn {
  font-size: 0.8rem;
  color: var(--gray-500);
}
.catalog-models {
  font-size: 0.75rem;
  color: var(--gray-500);
  font-style: italic;
  margin-top: 2px;
}
.catalog-meta {
  margin-top: auto;
  padding-top: 6px;
  font-size: 0.8rem;
  color: var(--gray-500);
  border-top: 1px dashed var(--gray-200);
}
.catalog-meta strong { color: #059669; }
@media (max-width: 768px) {
  .catalog-grid { grid-template-columns: repeat(2, 1fr); gap: 12px; }
}
@media (max-width: 480px) {
  .catalog-grid { grid-template-columns: 1fr; }
  .catalog-cat-title { font-size: 1.1rem; }
}

@media (max-width: 768px) {
  .nav-toggle { display: flex; }
  .btn-header-cta { display: none; }
  .nav {
    display: flex;
    flex-direction: column;
    gap: 0;
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    background: var(--white);
    box-shadow: var(--shadow-lg);
    padding: 0;
    max-height: 0;
    overflow: hidden;
    opacity: 0;
    visibility: hidden;
    transition: all 0.3s ease;
  }
  .nav.open {
    max-height: 520px;
    opacity: 1;
    visibility: visible;
    padding: 8px 0 16px;
  }
  .nav .nav-link {
    color: var(--dark);
    opacity: 1;
    padding: 14px 24px;
    font-size: 1rem;
    font-weight: 500;
    border-bottom: 1px solid var(--gray-100);
  }
  .nav .nav-link:last-child { border-bottom: none; }

  .hero-title { font-size: 2.2rem; }
  .hero-btns { flex-direction: column; }
  .hero-stats { gap: 24px; flex-wrap: wrap; justify-content: center; }

  .product-grid { grid-template-columns: 1fr; }
  .product-grid-3 { grid-template-columns: 1fr; }
  .product-grid-4 { grid-template-columns: 1fr; }
  .category-grid { grid-template-columns: 1fr; }
  .features-grid { grid-template-columns: 1fr; }
  .auth-cards { grid-template-columns: 1fr; }
  .global-grid { grid-template-columns: 1fr; }

  .about-grid { grid-template-columns: 1fr; }
  .about-stats-panel { display: grid; grid-template-columns: repeat(2, 1fr); }
  .stat-item:last-child { border-bottom: 1px solid rgba(255,255,255,0.15); }

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

  .partners-logos { gap: 20px; }
  .partner-logo-item { height: 60px; min-width: 120px; padding: 6px 12px; }
  .partner-logo-item img { max-height: 46px; }

  .section-title { font-size: 1.8rem; }

  .cert-grid { grid-template-columns: 1fr; }
  .cert-wide { grid-column: span 1; }

  .expo-card { flex-direction: column; gap: 12px; }
  .expo-year { text-align: left; min-width: auto; }
}

/* ============================================
   Multi-page SEO additions
   (breadcrumb, page-hero, product detail,
    spec table, category cards, 4-col grid)
   ============================================ */

/* --- Breadcrumb --- */
.breadcrumb {
  padding: 20px 0;
  font-size: 0.875rem;
  color: var(--gray-500);
}
.breadcrumb ol {
  list-style: none;
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 8px;
}
.breadcrumb li { display: flex; align-items: center; }
.breadcrumb a { color: var(--primary); font-weight: 500; }
.breadcrumb a:hover { text-decoration: underline; }
.breadcrumb li[aria-current] { color: var(--gray-800); font-weight: 600; }
.breadcrumb .sep { color: var(--gray-300); }

/* --- Page Hero (inner pages) --- */
.page-hero {
  position: relative;
  padding: 160px 0 80px;
  background: linear-gradient(135deg, #1e3a5f 0%, #1a56db 45%, #2563eb 100%);
  color: var(--white);
  overflow: hidden;
}
.page-hero::before {
  content: '';
  position: absolute;
  top: -40%;
  right: -10%;
  width: 500px;
  height: 500px;
  background: radial-gradient(circle, rgba(255,255,255,0.08) 0%, transparent 70%);
  border-radius: 50%;
}
.page-hero-title {
  position: relative;
  font-size: 2.75rem;
  font-weight: 800;
  letter-spacing: -0.02em;
  line-height: 1.15;
  margin-bottom: 16px;
}
.page-hero-sub {
  position: relative;
  font-size: 1.15rem;
  opacity: 0.9;
  max-width: 720px;
  line-height: 1.7;
}

/* --- Category Cards (home) --- */
.category-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
}
.category-card {
  display: block;
  background: var(--gray-50);
  border: 1px solid var(--gray-200);
  border-radius: var(--radius);
  padding: 32px 28px;
  transition: all var(--transition);
}
.category-card:hover {
  background: var(--white);
  border-color: var(--primary-light);
  box-shadow: var(--shadow-lg);
  transform: translateY(-3px);
}
.category-card-body h3 {
  font-size: 1.2rem;
  font-weight: 700;
  color: var(--dark);
  margin-bottom: 10px;
}
.category-card-body p {
  font-size: 0.9rem;
  color: var(--gray-600);
  line-height: 1.6;
  margin-bottom: 16px;
}
.category-count {
  display: inline-block;
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--primary);
  background: var(--primary-light);
  padding: 4px 12px;
  border-radius: 20px;
}

/* --- 4-column product grid --- */
.product-grid-4 {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
}

/* --- section CTA --- */
.section-cta {
  text-align: center;
  margin-top: 48px;
}

/* --- category cross links --- */
.category-links {
  margin-top: 48px;
  padding-top: 32px;
  border-top: 1px solid var(--gray-200);
}
.category-links p {
  font-size: 0.95rem;
  font-weight: 600;
  color: var(--dark);
  margin-bottom: 12px;
}
.cat-desc {
  font-size: 1rem;
  color: var(--gray-600);
  margin: -12px 0 24px;
  max-width: 760px;
}

/* --- Product Detail --- */
.product-detail {
  padding: 40px 0 100px;
  background: var(--white);
}
.product-detail-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 56px;
  align-items: start;
}
.product-detail-media {
  background: #f8fafc;
  border: 1px solid var(--gray-200);
  border-radius: var(--radius);
  overflow: hidden;
  padding: 32px;
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 320px;
}
.product-detail-media img {
  max-width: 100%;
  max-height: 480px;
  width: auto;
  height: auto;
  object-fit: contain;
}
.product-detail-title {
  font-size: 2rem;
  font-weight: 800;
  color: var(--dark);
  line-height: 1.2;
  letter-spacing: -0.02em;
  margin-bottom: 12px;
}
.product-detail-cat {
  font-size: 0.9rem;
  color: var(--gray-500);
  margin-bottom: 20px;
}
.product-detail-cat a {
  color: var(--primary);
  font-weight: 600;
}
.product-detail-cat a:hover { text-decoration: underline; }
.product-detail-desc {
  color: var(--gray-600);
  line-height: 1.8;
  margin-bottom: 28px;
  font-size: 1.05rem;
}
.product-detail-actions {
  display: flex;
  gap: 16px;
  margin-top: 32px;
  flex-wrap: wrap;
}

/* --- Spec Table --- */
.spec-table {
  width: 100%;
  border-collapse: collapse;
  margin-bottom: 8px;
  border: 1px solid var(--gray-200);
  border-radius: var(--radius-sm);
  overflow: hidden;
}
.spec-table th, .spec-table td {
  padding: 12px 16px;
  text-align: left;
  font-size: 0.92rem;
  border-bottom: 1px solid var(--gray-200);
  vertical-align: top;
}
.spec-table tr:last-child th,
.spec-table tr:last-child td { border-bottom: none; }
.spec-table th {
  width: 170px;
  background: var(--gray-50);
  color: var(--gray-700);
  font-weight: 600;
}
.spec-table td {
  color: var(--gray-800);
  word-break: break-word;
}
.spec-table td a { color: var(--primary); font-weight: 600; }
.spec-table td a:hover { text-decoration: underline; }

/* --- Related Products --- */
.related-products {
  padding: 80px 0 100px;
  background: var(--gray-50);
}

/* --- Outline button on light background --- */
.btn-outline.btn-dark {
  color: var(--dark);
  border-color: var(--gray-300);
  background: transparent;
}
.btn-outline.btn-dark:hover {
  background: var(--gray-100);
  color: var(--dark);
}

/* --- Responsive additions --- */
@media (max-width: 1024px) {
  .category-grid { grid-template-columns: repeat(2, 1fr); }
  .product-grid-4 { grid-template-columns: repeat(2, 1fr); }
  .product-detail-grid { grid-template-columns: 1fr; }
}

@media (max-width: 768px) {
  .page-hero { padding: 120px 0 48px; }
  .page-hero-title { font-size: 2rem; }
  .product-detail-grid { gap: 28px; }
  .product-detail-actions { flex-direction: column; }
  .product-detail-media { padding: 16px; min-height: 220px; }
  .product-detail-media img { max-height: 360px; }
  .spec-table th { width: 110px; }
  .cert-item { height: 240px; }
  .cert-wide { height: 260px; }
}

@media (max-width: 480px) {
  .hero-content { padding: 100px 0 60px; }
  .hero-title { font-size: 1.9rem; }
  .hero-desc { font-size: 1rem; }
  .stat-num { font-size: 2rem; }
  .section-title { font-size: 1.6rem; }
  .product-detail-title { font-size: 1.5rem; }
  .product-detail-media { padding: 12px; min-height: 180px; }
  .product-detail-media img { max-height: 300px; }
  .spec-table th { width: 96px; }
  .spec-table th, .spec-table td { padding: 10px 12px; font-size: 0.85rem; }
  .cert-item { height: 220px; padding: 10px; }
  .cert-wide { height: 240px; }
  .breadcrumb { font-size: 0.8rem; }
  .hot-product-img { padding: 10px; }
}

/* === 询价弹窗 === */
.inq-overlay {
  position: fixed;
  inset: 0;
  background: rgba(15, 23, 42, 0.55);
  backdrop-filter: blur(2px);
  -webkit-backdrop-filter: blur(2px);
  display: none;
  align-items: flex-start;
  justify-content: center;
  z-index: 9999;
  padding: 40px 16px 16px;
  overflow-y: auto;
}
.inq-overlay.open { display: flex; }
.inq-modal {
  background: #fff;
  border-radius: 12px;
  width: 100%;
  max-width: 520px;
  padding: 28px 28px 24px;
  box-shadow: 0 20px 60px rgba(0,0,0,0.25);
  position: relative;
  animation: inqSlide 0.22s ease-out;
}
@keyframes inqSlide {
  from { opacity: 0; transform: translateY(-12px); }
  to   { opacity: 1; transform: translateY(0); }
}
.inq-close {
  position: absolute;
  top: 10px;
  right: 12px;
  background: none;
  border: none;
  font-size: 28px;
  line-height: 1;
  color: var(--gray-500);
  cursor: pointer;
  padding: 4px 8px;
}
.inq-close:hover { color: var(--text); }
.inq-title {
  margin: 0 0 16px;
  font-size: 1.4rem;
  color: var(--text);
}
.inq-partbox {
  display: flex;
  align-items: center;
  gap: 12px;
  background: var(--gray-50, #f8fafc);
  border: 1px solid var(--gray-200);
  border-radius: 8px;
  padding: 10px 12px;
  margin-bottom: 16px;
}
.inq-partbox img {
  width: 56px;
  height: 56px;
  object-fit: contain;
  background: #fff;
  border-radius: 6px;
  padding: 4px;
  flex-shrink: 0;
}
.inq-partbox-txt { min-width: 0; }
.inq-pn {
  font-family: monospace;
  font-size: 0.86rem;
  color: var(--primary);
  font-weight: 600;
  word-break: break-all;
}
.inq-nm {
  font-size: 0.95rem;
  color: var(--text);
  font-weight: 500;
  margin-top: 2px;
}
.inq-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 12px;
}
.inq-actions {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 10px;
  margin-top: 4px;
}
.inq-note {
  text-align: center;
  font-size: 0.82rem;
  color: var(--gray-500);
  margin: 10px 0 0;
}
.btn-wa {
  background: #25D366;
  color: #fff;
  border: none;
}
.btn-wa:hover { background: #1ebe57; color: #fff; }
.inq-done {
  text-align: center;
  padding: 12px 0;
}
.inq-done-icon {
  width: 56px;
  height: 56px;
  line-height: 56px;
  border-radius: 50%;
  background: #d1fae5;
  color: #059669;
  font-size: 32px;
  margin: 0 auto 12px;
}
.inq-done h4 { margin: 0 0 8px; color: var(--text); }
.inq-done p { font-size: 0.92rem; color: var(--gray-500); margin: 0 0 16px; }
.inq-done a { color: var(--primary); }

@media (max-width: 520px) {
  .inq-modal { padding: 22px 18px 20px; }
  .inq-row, .inq-actions { grid-template-columns: 1fr; }
  .inq-overlay { padding: 20px 10px 10px; }
}

/* --- Language switcher (multilingual) --- */
.header-actions {
  display: flex;
  align-items: center;
  gap: 12px;
}
.lang-switch {
  position: relative;
}
.lang-btn {
  display: inline-flex;
  align-items: center;
  gap: 5px;
  padding: 8px 12px;
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--white);
  background: rgba(255, 255, 255, 0.12);
  border: 1px solid rgba(255, 255, 255, 0.25);
  border-radius: 8px;
  cursor: pointer;
  transition: background var(--transition);
}
.header-scrolled .lang-btn { color: var(--dark); border-color: rgba(0, 0, 0, 0.15); background: rgba(0, 0, 0, 0.04); }
.lang-btn:hover { background: rgba(255, 255, 255, 0.22); }
.lang-menu {
  position: absolute;
  top: calc(100% + 8px);
  right: 0;
  min-width: 140px;
  background: #fff;
  border: 1px solid var(--gray-200, #e5e7eb);
  border-radius: 10px;
  box-shadow: 0 12px 30px rgba(0, 0, 0, 0.14);
  padding: 6px;
  display: none;
  z-index: 200;
}
.lang-switch:hover .lang-menu,
.lang-switch:focus-within .lang-menu { display: block; }
.lang-opt {
  display: block;
  padding: 8px 12px;
  font-size: 0.9rem;
  color: var(--dark);
  border-radius: 6px;
  transition: background 0.15s;
}
.lang-opt:hover { background: #f1f5f9; }
.lang-opt.active { background: var(--primary, #e11d48); color: #fff; font-weight: 600; }

@media (max-width: 1024px) {
  .header-actions { gap: 8px; }
  .lang-btn { padding: 7px 10px; }
}
@media (max-width: 768px) {
  .header-actions { gap: 6px; }
  .lang-menu { right: auto; left: 0; }
}

/* ===== RTL (Arabic) support ===== */
html[dir="rtl"] body {
  font-family: 'Inter', 'Noto Sans Arabic', 'Segoe UI', Tahoma, 'Arial', sans-serif;
}
html[dir="rtl"] h1, html[dir="rtl"] h2, html[dir="rtl"] h3,
html[dir="rtl"] h4, html[dir="rtl"] .nav-link, html[dir="rtl"] .btn {
  font-family: 'Noto Sans Arabic', 'Segoe UI', Tahoma, 'Arial', sans-serif;
}
/* language dropdown opens to the left in RTL */
html[dir="rtl"] .lang-menu { right: auto; left: 0; }
/* force right alignment on the one inventory section header that inlines text-align:left */
html[dir="rtl"] .section-header[style*="text-align"] { text-align: right !important; }
/* hero/subtitle/desc/paragraph blocks read right-to-left */
html[dir="rtl"] .hero-content,
html[dir="rtl"] .hero-subtitle,
html[dir="rtl"] .about-content,
html[dir="rtl"] .contact-info,
html[dir="rtl"] .blog-post,
html[dir="rtl"] .global-card,
html[dir="rtl"] .expo-content,
html[dir="rtl"] .auth-desc,
html[dir="rtl"] .feature-card,
html[dir="rtl"] .contact-desc,
html[dir="rtl"] .section-desc { text-align: right; }
/* keep latin part numbers & counts readable inside RTL flow */
html[dir="rtl"] .catalog-pn,
html[dir="rtl"] .catalog-models,
html[dir="rtl"] .stat-num,
html[dir="rtl"] .stat-item-num,
html[dir="rtl"] .expo-date,
html[dir="rtl"] .expo-year,
html[dir="rtl"] .blog-tl-year,
html[dir="rtl"] .catalog-count { direction: ltr; unicode-bidi: isolate; }
html[dir="rtl"] .bauma-venue {
  border-left: 1px solid var(--gray-200);
  border-right: 4px solid var(--accent);
}
html[dir="rtl"] .bauma-fact,
html[dir="rtl"] .bauma-q,
html[dir="rtl"] .bauma-a,
html[dir="rtl"] .blog-card { text-align: right; }

/* --- Social profile cards (contact page) --- */
.social-section { padding: 8px 0 72px; }
.social-cards { display: grid; grid-template-columns: repeat(4, 1fr); gap: 16px; margin-top: 8px; }
.social-card {
  display: flex; align-items: center; gap: 12px;
  padding: 16px 18px; border-radius: 12px;
  border: 1px solid var(--gray-200); background: #fff;
  transition: transform 0.2s ease, box-shadow 0.2s ease, border-color 0.2s ease;
}
.social-card:hover { transform: translateY(-3px); box-shadow: 0 10px 24px rgba(0,0,0,0.08); border-color: var(--gray-300); }
.social-card-icon {
  flex: 0 0 auto; width: 40px; height: 40px; border-radius: 50%;
  display: inline-flex; align-items: center; justify-content: center; color: #fff;
}
.social-card-icon svg { display: block; }
.social-card[data-net="facebook"] .social-card-icon { background: #1877F2; }
.social-card[data-net="youtube"] .social-card-icon { background: #FF0000; }
.social-card[data-net="instagram"] .social-card-icon { background: linear-gradient(45deg,#F58529,#DD2A7B,#8134AF); }
.social-card[data-net="whatsapp"] .social-card-icon { background: #25D366; }
.social-card-text { min-width: 0; }
.social-card-name { display: block; font-weight: 600; color: var(--gray-900); font-size: 0.95rem; }
.social-card-handle { display: block; font-size: 0.78rem; color: var(--gray-500); overflow: hidden; text-overflow: ellipsis; white-space: nowrap; direction: ltr; }
@media (max-width: 900px) { .social-cards { grid-template-columns: repeat(2, 1fr); } }
@media (max-width: 560px) { .social-cards { grid-template-columns: 1fr; } }

/* --- Brand relationship block (About page) --- */
.brand-rel-section, .facts-section { padding: 8px 0 72px; }
.brand-rel { display: grid; grid-template-columns: 1fr 1fr; gap: 24px; margin-top: 8px; }
.brand-rel-card {
  padding: 26px 28px; border-radius: 14px; background: #fff;
  border: 1px solid var(--gray-200); border-top: 4px solid var(--accent);
}
.brand-rel-card h3 { margin: 0 0 6px; font-size: 1.15rem; color: var(--gray-900); }
.brand-rel-tag { display: inline-block; font-size: 0.72rem; letter-spacing: 0.08em; text-transform: uppercase; color: var(--accent); font-weight: 700; margin-bottom: 10px; }
.brand-rel-card p { color: var(--gray-600); line-height: 1.75; margin: 0 0 10px; }
.brand-rel-link { font-weight: 600; color: var(--accent); text-decoration: none; }
.brand-rel-link:hover { text-decoration: underline; }
@media (max-width: 760px) { .brand-rel { grid-template-columns: 1fr; } }

/* --- Quick facts (GEO / AI-answer friendly) --- */
.quick-facts { background: var(--gray-50, #f8fafc); border: 1px solid var(--gray-200); border-radius: 14px; padding: 24px 28px; margin-top: 8px; }
.quick-facts h3 { margin: 0 0 14px; font-size: 1.05rem; }
.quick-facts dl { display: grid; grid-template-columns: auto 1fr; gap: 8px 18px; margin: 0; }
.quick-facts dt { font-weight: 600; color: var(--gray-900); font-size: 0.9rem; }
.quick-facts dd { margin: 0; color: var(--gray-600); font-size: 0.9rem; }
@media (max-width: 560px) { .quick-facts dl { grid-template-columns: 1fr; gap: 2px 0; } .quick-facts dd { margin-bottom: 8px; } }

/* --- Sister-site cross-promotion (Hot Sellers) --- */
.sister-link {
  display: block;
  margin: 0 12px 8px;
  padding: 8px 10px;
  background: linear-gradient(135deg, #fef3c7 0%, #fde68a 100%);
  color: #92400e;
  border: 1px solid #fbbf24;
  border-radius: 6px;
  font-size: 0.8rem;
  font-weight: 500;
  text-decoration: none;
  text-align: center;
  transition: all 0.2s;
}
.sister-link:hover {
  background: linear-gradient(135deg, #fde68a 0%, #fbbf24 100%);
  color: #78350f;
  transform: translateY(-1px);
  box-shadow: 0 2px 6px rgba(146, 64, 14, 0.2);
}
.sister-link strong {
  font-weight: 700;
  color: #78350f;
}
.sister-spec-link {
  color: #92400e;
  text-decoration: none;
  border-bottom: 1px dashed #fbbf24;
  transition: color 0.15s;
}
.sister-spec-link:hover {
  color: #78350f;
  border-bottom-color: #78350f;
}


/* ============================================
   CTA Box (catalog pages) — 2026-09-17 补
   这些类此前无样式（HTML 裸奔），纯新增不影响既有元素
   ============================================ */
.cta { padding: 64px 0 88px; background: var(--white); }
.cta-box {
  background: linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 100%);
  border-radius: var(--radius);
  padding: 56px 48px;
  text-align: center;
  color: var(--white);
  box-shadow: var(--shadow-lg);
}
.cta-box h2 { font-size: 1.9rem; font-weight: 800; margin: 0 0 14px; color: var(--white); letter-spacing: -0.02em; }
.cta-box p { font-size: 1.05rem; color: rgba(255,255,255,.9); max-width: 640px; margin: 0 auto 28px; line-height: 1.7; }
.cta-btns { display: flex; gap: 16px; justify-content: center; flex-wrap: wrap; }
.cta-btns .btn-outline { border-color: rgba(255,255,255,.6); color: var(--white); }
.cta-btns .btn-outline:hover { background: rgba(255,255,255,.12); border-color: var(--white); }
@media (max-width: 640px) {
  .cta { padding: 44px 0 64px; }
  .cta-box { padding: 40px 22px; }
  .cta-box h2 { font-size: 1.45rem; }
}

/* ============================================
   Category deep-content modules (cb-* )
   Added 2026-09-22 — additive only, no
   existing selector is modified.
   ============================================ */
.cb-sec { padding: 54px 0; background: var(--white); }
.cb-sec-alt { background: #f8fafc; }
.cb-prose { max-width: 900px; }
.cb-prose p { color: #3f4d5e; line-height: 1.85; margin: 0 0 18px; font-size: 1.02rem; }
.cb-note { color: #5b6779; font-size: 0.92rem; line-height: 1.75; margin: 16px 0 0; max-width: 900px; }
.cb-table-wrap { overflow-x: auto; margin-top: 6px; -webkit-overflow-scrolling: touch; }
.cb-table { width: 100%; border-collapse: collapse; background: var(--white); border: 1px solid #e2e8f0; border-radius: 10px; overflow: hidden; font-size: 0.94rem; }
.cb-table th, .cb-table td { padding: 13px 16px; text-align: left; vertical-align: top; border-bottom: 1px solid #eef2f7; line-height: 1.65; }
.cb-table thead th { background: #f1f5f9; font-weight: 700; color: #1e293b; font-size: 0.86rem; letter-spacing: .02em; text-transform: uppercase; }
.cb-table tbody tr:last-child td { border-bottom: none; }
.cb-table tbody tr:hover td { background: #f8fafc; }
.cb-table td { color: #475569; }
.cb-table td:first-child { color: #1e293b; font-weight: 600; }
.cb-table-3 td:nth-child(2) { width: 34%; }
.cb-table-4 td:nth-child(4) { width: 30%; }
.cb-list { list-style: none; margin: 10px 0 0; padding: 0; max-width: 940px; }
.cb-list li { position: relative; padding: 0 0 14px 26px; color: #475569; line-height: 1.75; }
.cb-list li::before { content: ""; position: absolute; left: 4px; top: 10px; width: 8px; height: 8px; border-radius: 50%; background: var(--primary); }
.cb-faq { max-width: 940px; margin-top: 6px; }
.cb-faq details { background: var(--white); border: 1px solid #e2e8f0; border-radius: 8px; padding: 14px 18px; margin-bottom: 10px; }
.cb-faq summary { font-weight: 600; cursor: pointer; color: var(--gray-700); line-height: 1.6; }
.cb-faq p { margin: 10px 0 0; color: #475569; line-height: 1.75; }
@media (max-width: 768px) {
  .cb-sec { padding: 40px 0; }
  .cb-table { font-size: 0.85rem; }
  .cb-table th, .cb-table td { padding: 10px 12px; }
  .cb-table-3 td:nth-child(2), .cb-table-4 td:nth-child(4) { width: auto; }
}
.cb-stats { display: grid; grid-template-columns: repeat(4, 1fr); gap: 16px; margin: 18px 0 8px; }
.cb-stat { background: #f8fafc; border: 1px solid #e2e8f0; border-radius: 10px; padding: 18px 20px; }
.cb-stat .n { font-size: 26px; font-weight: 800; letter-spacing: -.5px; line-height: 1.15; color: var(--primary); }
.cb-stat .l { font-size: 12.5px; color: #6b7684; margin-top: 4px; line-height: 1.5; }
@media (max-width: 768px) {
  .cb-stats { grid-template-columns: 1fr 1fr; gap: 12px; }
  .cb-stat { padding: 14px 15px; }
  .cb-stat .n { font-size: 21px; }
}