/* EGEN Auto Parts - B2B Foreign Trade Website Stylesheet */

/* ===== CSS Variables - Brand Colors ===== */
:root {
  --brand-blue: #1e3a8a;
  --brand-blue-light: #2563eb;
  --brand-orange: #f97316;
  --brand-orange-light: #fb923c;
  --metal-dark: #1f2937;
  --metal-gray: #6b7280;
  --metal-light: #9ca3af;
  --white: #ffffff;
  --off-white: #f9fafb;
  --light-gray: #f3f4f6;
  --border-gray: #e5e7eb;
  --text-dark: #111827;
  --text-gray: #4b5563;
  --success-green: #10b981;
  --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
  --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
  --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1);
  --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1);
  --transition: all 0.3s ease;
}

/* ===== Reset & Base Styles ===== */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  font-family: 'Segoe UI', 'Helvetica Neue', Arial, sans-serif;
  line-height: 1.6;
  color: var(--text-dark);
  background-color: var(--white);
  overflow-x: hidden;
}

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

ul {
  list-style: none;
}

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

.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 20px;
}

/* ===== Header & Navigation ===== */
.header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  background: var(--white);
  box-shadow: var(--shadow-md);
  z-index: 1000;
  transition: var(--transition);
}

.header.scrolled {
  background: rgba(255, 255, 255, 0.98);
  backdrop-filter: blur(10px);
}

.nav-container {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 15px 0;
}

.logo {
  display: flex;
  align-items: center;
  gap: 12px;
}

.logo-text {
  font-size: 28px;
  font-weight: 800;
  color: var(--brand-blue);
  letter-spacing: -1px;
}

.logo-text span {
  color: var(--brand-orange);
}

.logo-tagline {
  font-size: 11px;
  color: var(--metal-gray);
  letter-spacing: 2px;
  text-transform: uppercase;
  margin-top: -5px;
}

.nav-menu {
  display: flex;
  gap: 30px;
  align-items: center;
}

.nav-menu a {
  font-size: 15px;
  font-weight: 600;
  color: var(--text-dark);
  padding: 8px 0;
  position: relative;
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.nav-menu a::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 0;
  height: 2px;
  background: var(--brand-orange);
  transition: var(--transition);
}

.nav-menu a:hover::after,
.nav-menu a.active::after {
  width: 100%;
}

.nav-menu a:hover {
  color: var(--brand-blue);
}

.nav-cta {
  background: var(--brand-orange);
  color: var(--white) !important;
  padding: 10px 24px !important;
  border-radius: 4px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.nav-cta::after {
  display: none;
}

.nav-cta:hover {
  background: var(--brand-orange-light);
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
}

/* Mobile Menu Toggle */
.menu-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  cursor: pointer;
  padding: 5px;
}

.menu-toggle span {
  width: 25px;
  height: 3px;
  background: var(--text-dark);
  transition: var(--transition);
}

/* ===== Hero Banner / Slideshow ===== */
.hero {
  margin-top: 80px;
  position: relative;
  overflow: hidden;
  background: var(--metal-dark);
}

.hero-slide {
  position: relative;
  height: 600px;
  display: flex;
  align-items: center;
  overflow: hidden;
}

.hero-slide::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: linear-gradient(135deg, rgba(30, 58, 138, 0.9), rgba(37, 99, 235, 0.7));
  z-index: 1;
}

.hero-content {
  position: relative;
  z-index: 2;
  color: var(--white);
  max-width: 700px;
}

.hero-badge {
  display: inline-block;
  background: var(--brand-orange);
  color: var(--white);
  padding: 8px 20px;
  border-radius: 4px;
  font-size: 14px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 1px;
  margin-bottom: 20px;
}

.hero-title {
  font-size: 52px;
  font-weight: 800;
  line-height: 1.1;
  margin-bottom: 20px;
  text-transform: uppercase;
}

.hero-title span {
  color: var(--brand-orange);
}

.hero-subtitle {
  font-size: 20px;
  margin-bottom: 30px;
  opacity: 0.95;
  line-height: 1.5;
}

.hero-btn {
  display: inline-block;
  background: var(--brand-orange);
  color: var(--white);
  padding: 15px 40px;
  border-radius: 4px;
  font-size: 16px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 1px;
  transition: var(--transition);
  border: 2px solid var(--brand-orange);
}

.hero-btn:hover {
  background: var(--brand-orange-light);
  border-color: var(--brand-orange-light);
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
}

.hero-stats {
  display: flex;
  gap: 40px;
  margin-top: 40px;
}

.hero-stat {
  text-align: center;
}

.hero-stat-number {
  font-size: 42px;
  font-weight: 800;
  color: var(--brand-orange);
  display: block;
}

.hero-stat-label {
  font-size: 14px;
  text-transform: uppercase;
  letter-spacing: 1px;
  opacity: 0.9;
}

/* ===== Section Styles ===== */
.section {
  padding: 80px 0;
}

.section-dark {
  background: var(--metal-dark);
  color: var(--white);
}

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

.section-header {
  text-align: center;
  margin-bottom: 60px;
}

.section-header h2 {
  font-size: 36px;
  font-weight: 800;
  color: var(--text-dark);
  text-transform: uppercase;
  letter-spacing: 1px;
  margin-bottom: 15px;
}

.section-dark .section-header h2 {
  color: var(--white);
}

.section-header p {
  font-size: 18px;
  color: var(--metal-gray);
  max-width: 600px;
  margin: 0 auto;
}

.section-dark .section-header p {
  color: var(--metal-light);
}

.section-header .orange-line {
  width: 60px;
  height: 4px;
  background: var(--brand-orange);
  margin: 0 auto 20px;
}

/* ===== Product Categories ===== */
.categories-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 30px;
}

.category-card {
  background: var(--white);
  border-radius: 8px;
  overflow: hidden;
  box-shadow: var(--shadow-md);
  transition: var(--transition);
  border: 1px solid var(--border-gray);
}

.category-card:hover {
  transform: translateY(-10px);
  box-shadow: var(--shadow-xl);
  border-color: var(--brand-blue);
}

.category-img {
  height: 250px;
  background: var(--light-gray);
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
  overflow: hidden;
}

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

.category-icon {
  font-size: 80px;
  color: var(--brand-blue);
  opacity: 0.2;
}

.category-content {
  padding: 25px;
}

.category-content h3 {
  font-size: 20px;
  font-weight: 700;
  color: var(--text-dark);
  margin-bottom: 10px;
  text-transform: uppercase;
}

.category-content p {
  font-size: 14px;
  color: var(--metal-gray);
  margin-bottom: 15px;
  line-height: 1.6;
}

.category-items {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: 20px;
}

.category-item-tag {
  background: var(--light-gray);
  color: var(--text-gray);
  padding: 5px 12px;
  border-radius: 20px;
  font-size: 12px;
  font-weight: 600;
}

.category-link {
  display: inline-block;
  color: var(--brand-blue);
  font-weight: 700;
  font-size: 14px;
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.category-link:hover {
  color: var(--brand-orange);
}

/* ===== Features / Selling Points ===== */
.features-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 30px;
}

.feature-card {
  text-align: center;
  padding: 40px 30px;
  background: var(--white);
  border-radius: 8px;
  box-shadow: var(--shadow-md);
  transition: var(--transition);
  border: 1px solid var(--border-gray);
}

.feature-card:hover {
  transform: translateY(-5px);
  border-color: var(--brand-orange);
}

.feature-icon {
  width: 80px;
  height: 80px;
  background: var(--brand-blue);
  color: var(--white);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 36px;
  margin: 0 auto 20px;
}

.feature-card h3 {
  font-size: 20px;
  font-weight: 700;
  color: var(--text-dark);
  margin-bottom: 15px;
  text-transform: uppercase;
}

.feature-card p {
  font-size: 14px;
  color: var(--metal-gray);
  line-height: 1.7;
}

/* ===== Product Filter ===== */
.product-filter {
  display: flex;
  justify-content: center;
  flex-wrap: wrap;
  gap: 12px;
  margin-bottom: 50px;
}

.filter-btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 10px 24px;
  background: var(--white);
  border: 2px solid var(--border-gray);
  border-radius: 4px;
  font-size: 14px;
  font-weight: 700;
  color: var(--text-gray);
  cursor: pointer;
  transition: var(--transition);
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.filter-btn:hover {
  border-color: var(--brand-blue);
  color: var(--brand-blue);
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
}

.filter-btn.active {
  background: var(--brand-blue);
  border-color: var(--brand-blue);
  color: var(--white);
}

/* ===== Featured Products ===== */
.products-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 30px;
}

.product-card {
  background: var(--white);
  border-radius: 8px;
  overflow: hidden;
  box-shadow: var(--shadow-md);
  transition: var(--transition);
  border: 1px solid var(--border-gray);
}

.product-card:hover {
  transform: translateY(-8px);
  box-shadow: var(--shadow-xl);
}

.product-img {
  height: 280px;
  background: var(--off-white);
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
  border-bottom: 1px solid var(--border-gray);
}

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

.product-badge {
  position: absolute;
  top: 15px;
  left: 15px;
  background: var(--brand-orange);
  color: var(--white);
  padding: 5px 15px;
  border-radius: 4px;
  font-size: 12px;
  font-weight: 700;
  text-transform: uppercase;
}

.product-brand {
  position: absolute;
  top: 15px;
  right: 15px;
  background: var(--brand-blue);
  color: var(--white);
  padding: 5px 15px;
  border-radius: 4px;
  font-size: 12px;
  font-weight: 700;
}

.product-content {
  padding: 25px;
}

.product-content h3 {
  font-size: 18px;
  font-weight: 700;
  color: var(--text-dark);
  margin-bottom: 10px;
  text-transform: uppercase;
}

.product-oe {
  font-size: 13px;
  color: var(--brand-blue);
  font-weight: 600;
  margin-bottom: 8px;
}

.product-desc {
  font-size: 14px;
  color: var(--metal-gray);
  margin-bottom: 15px;
  line-height: 1.6;
}

.product-btn {
  display: inline-block;
  background: var(--brand-blue);
  color: var(--white);
  padding: 10px 25px;
  border-radius: 4px;
  font-size: 14px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  transition: var(--transition);
}

.product-btn:hover {
  background: var(--brand-orange);
}

/* ===== About Page ===== */
.about-timeline {
  position: relative;
  padding: 40px 0;
}

.about-timeline::before {
  content: '';
  position: absolute;
  left: 50%;
  transform: translateX(-50%);
  width: 4px;
  height: 100%;
  background: var(--brand-orange);
}

.timeline-item {
  display: flex;
  justify-content: flex-start;
  align-items: center;
  margin-bottom: 60px;
  position: relative;
}

.timeline-item:nth-child(odd) {
  flex-direction: row;
}

.timeline-item:nth-child(even) {
  flex-direction: row-reverse;
}

.timeline-content {
  width: 42%;
  background: var(--white);
  padding: 30px;
  border-radius: 8px;
  box-shadow: var(--shadow-md);
  border: 1px solid var(--border-gray);
}

.timeline-year {
  position: absolute;
  left: 50%;
  transform: translateX(-50%);
  background: var(--brand-orange);
  color: var(--white);
  width: 80px;
  height: 80px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 20px;
  font-weight: 800;
  z-index: 2;
}

.timeline-content h3 {
  font-size: 22px;
  font-weight: 700;
  color: var(--brand-blue);
  margin-bottom: 15px;
}

.timeline-content p {
  font-size: 15px;
  color: var(--text-gray);
  line-height: 1.7;
}

.about-stats {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 30px;
  margin-top: 60px;
}

.about-stat {
  text-align: center;
  padding: 30px;
  background: var(--white);
  border-radius: 8px;
  box-shadow: var(--shadow-md);
}

.about-stat-number {
  font-size: 48px;
  font-weight: 800;
  color: var(--brand-orange);
  display: block;
  margin-bottom: 10px;
}

.about-stat-label {
  font-size: 16px;
  color: var(--text-gray);
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

/* ===== Contact Page ===== */
.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 60px;
}

.contact-info h3 {
  font-size: 24px;
  font-weight: 700;
  color: var(--text-dark);
  margin-bottom: 30px;
}

.contact-item {
  display: flex;
  gap: 20px;
  margin-bottom: 30px;
  align-items: flex-start;
}

.contact-icon {
  width: 50px;
  height: 50px;
  background: var(--brand-blue);
  color: var(--white);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 20px;
  flex-shrink: 0;
}

.contact-item-content h4 {
  font-size: 16px;
  font-weight: 700;
  color: var(--text-dark);
  margin-bottom: 5px;
  text-transform: uppercase;
}

.contact-item-content p {
  font-size: 15px;
  color: var(--metal-gray);
  line-height: 1.6;
}

/* ===== Inquiry Form (Floating) ===== */
.inquiry-float {
  position: fixed;
  bottom: 30px;
  right: 30px;
  z-index: 999;
}

.inquiry-toggle {
  width: 60px;
  height: 60px;
  background: var(--brand-orange);
  color: var(--white);
  border: none;
  border-radius: 50%;
  font-size: 24px;
  cursor: pointer;
  box-shadow: var(--shadow-lg);
  transition: var(--transition);
  display: flex;
  align-items: center;
  justify-content: center;
}

.inquiry-toggle:hover {
  transform: scale(1.1);
  background: var(--brand-orange-light);
}

.inquiry-form-container {
  position: absolute;
  bottom: 80px;
  right: 0;
  width: 400px;
  background: var(--white);
  border-radius: 12px;
  box-shadow: var(--shadow-xl);
  padding: 30px;
  display: none;
  border: 2px solid var(--brand-blue);
}

.inquiry-form-container.active {
  display: block;
  animation: slideUp 0.3s ease;
}

@keyframes slideUp {
  from {
    opacity: 0;
    transform: translateY(20px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.inquiry-form-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 25px;
}

.inquiry-form-header h3 {
  font-size: 20px;
  font-weight: 700;
  color: var(--brand-blue);
  text-transform: uppercase;
}

.inquiry-close {
  background: none;
  border: none;
  font-size: 24px;
  cursor: pointer;
  color: var(--metal-gray);
  transition: var(--transition);
}

.inquiry-close:hover {
  color: var(--brand-orange);
}

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

.inquiry-form label {
  display: block;
  font-size: 14px;
  font-weight: 600;
  color: var(--text-dark);
  margin-bottom: 8px;
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.inquiry-form input,
.inquiry-form textarea {
  width: 100%;
  padding: 12px 15px;
  border: 2px solid var(--border-gray);
  border-radius: 6px;
  font-size: 14px;
  font-family: inherit;
  transition: var(--transition);
  background: var(--off-white);
}

.inquiry-form input:focus,
.inquiry-form textarea:focus {
  outline: none;
  border-color: var(--brand-blue);
  background: var(--white);
}

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

.inquiry-form button {
  width: 100%;
  background: var(--brand-orange);
  color: var(--white);
  padding: 15px;
  border: none;
  border-radius: 6px;
  font-size: 16px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 1px;
  cursor: pointer;
  transition: var(--transition);
}

.inquiry-form button:hover {
  background: var(--brand-orange-light);
  box-shadow: var(--shadow-md);
}

/* ===== Footer ===== */
.footer {
  background: var(--metal-dark);
  color: var(--white);
  padding: 60px 0 30px;
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: 40px;
  margin-bottom: 40px;
}

.footer-brand h3 {
  font-size: 28px;
  font-weight: 800;
  color: var(--white);
  margin-bottom: 15px;
}

.footer-brand h3 span {
  color: var(--brand-orange);
}

.footer-brand p {
  font-size: 14px;
  color: var(--metal-light);
  line-height: 1.7;
  margin-bottom: 20px;
}

.footer-social {
  display: flex;
  gap: 15px;
}

.footer-social a {
  width: 40px;
  height: 40px;
  background: rgba(255, 255, 255, 0.1);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 18px;
  transition: var(--transition);
}

.footer-social a:hover {
  background: var(--brand-orange);
  transform: translateY(-3px);
}

.footer-links h4 {
  font-size: 16px;
  font-weight: 700;
  color: var(--white);
  margin-bottom: 20px;
  text-transform: uppercase;
  letter-spacing: 1px;
}

.footer-links ul li {
  margin-bottom: 12px;
}

.footer-links ul li a {
  font-size: 14px;
  color: var(--metal-light);
  transition: var(--transition);
}

.footer-links ul li a:hover {
  color: var(--brand-orange);
  padding-left: 5px;
}

.footer-bottom {
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  padding-top: 30px;
  text-align: center;
  font-size: 14px;
  color: var(--metal-light);
}

/* ===== Page Specific Layouts ===== */
.featured-seller {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 40px;
  margin-bottom: 60px;
  padding: 30px;
  background: var(--light-gray);
  border-radius: 12px;
  align-items: center;
}

.featured-seller-img {
  text-align: center;
}

.featured-seller-img img {
  width: 100%;
  border-radius: 12px;
  border: 1px solid var(--border-gray);
}

.featured-seller-reverse .featured-seller-img {
  order: 2;
}

.featured-seller-reverse .featured-seller-info {
  order: 1;
}

.about-intro-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 60px;
  align-items: center;
  margin-bottom: 80px;
}

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

.about-brands-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 40px;
}

.about-exhibition-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 40px;
}

.about-markets-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 40px;
}

.about-stat-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 20px;
  text-align: left;
}

.compatible-vehicles-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 10px;
}

/* ===== Responsive Design ===== */
@media (max-width: 1024px) {
  .categories-grid {
    grid-template-columns: repeat(2, 1fr);
  }

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

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

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

  .featured-seller {
    grid-template-columns: 1fr;
    padding: 25px;
    gap: 30px;
  }

  .featured-seller-reverse .featured-seller-img,
  .featured-seller-reverse .featured-seller-info {
    order: 0;
  }

  .about-intro-grid,
  .about-warehouse-grid {
    grid-template-columns: 1fr;
    gap: 40px;
    margin-bottom: 40px;
  }

  .about-brands-grid,
  .about-markets-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: 25px;
  }

  .about-exhibition-grid {
    grid-template-columns: 1fr;
  }

  .about-stat-grid {
    grid-template-columns: 1fr 1fr;
  }

  .product-detail-grid {
    grid-template-columns: 1fr;
    gap: 40px;
  }
}

@media (max-width: 768px) {
  .menu-toggle {
    display: flex;
  }
  
  .nav-menu {
    position: fixed;
    top: 80px;
    left: -100%;
    flex-direction: column;
    background: var(--white);
    width: 100%;
    padding: 30px;
    box-shadow: var(--shadow-lg);
    transition: var(--transition);
    gap: 20px;
  }
  
  .nav-menu.active {
    left: 0;
  }
  
  .hero {
    margin-top: 90px;
  }

  .hero-slide {
    height: auto;
    min-height: 480px;
    padding: 50px 0;
  }

  .hero-content {
    max-width: 100%;
    padding: 0 10px;
  }

  .hero-badge {
    font-size: 12px;
    padding: 6px 16px;
    margin-bottom: 15px;
  }

  .hero-title {
    font-size: 32px;
    line-height: 1.15;
    margin-bottom: 15px;
  }

  .hero-subtitle {
    font-size: 16px;
    line-height: 1.6;
    margin-bottom: 25px;
  }

  .hero-btn {
    padding: 12px 32px;
    font-size: 15px;
  }

  .hero-stats {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 15px;
    margin-top: 30px;
  }

  .hero-stat {
    background: rgba(255,255,255,0.08);
    border-radius: 8px;
    padding: 12px 8px;
  }

  .hero-stat-number {
    font-size: 28px;
  }

  .hero-stat-label {
    font-size: 11px;
  }
  
  .categories-grid,
  .features-grid,
  .products-grid {
    grid-template-columns: 1fr;
  }
  
  .contact-grid {
    grid-template-columns: 1fr;
  }
  
  .about-timeline::before {
    left: 30px;
  }
  
  .timeline-item,
  .timeline-item:nth-child(odd),
  .timeline-item:nth-child(even) {
    flex-direction: column;
    align-items: flex-start;
    padding-left: 80px;
  }
  
  .timeline-content {
    width: 100%;
  }
  
  .timeline-year {
    left: 30px;
    width: 60px;
    height: 60px;
    font-size: 16px;
  }
  
  .about-stats {
    grid-template-columns: repeat(2, 1fr);
  }

  .about-brands-grid,
  .about-exhibition-grid,
  .about-markets-grid {
    grid-template-columns: 1fr;
  }

  .about-stat-grid {
    grid-template-columns: 1fr 1fr;
  }

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

  .inquiry-form-container {
    width: 300px;
    right: -50px;
  }

  .compatible-vehicles-grid {
    grid-template-columns: 1fr;
  }

  /* Page banner mobile */
  .page-banner {
    padding: 50px 0 !important;
  }
  .page-banner-title {
    font-size: 32px !important;
  }

  /* Section titles mobile */
  .section-title {
    font-size: 28px !important;
  }

  /* Info cards mobile */
  .info-card {
    padding: 30px 20px !important;
  }

  /* Stat numbers mobile */
  .stat-number {
    font-size: 22px !important;
  }

  /* Warehouse stat mobile */
  .warehouse-stat {
    font-size: 40px !important;
  }

  /* Brand names mobile */
  .brand-name {
    font-size: 48px !important;
  }

  /* Exhibition items mobile */
  .exhibition-item {
    flex-direction: column !important;
    align-items: center !important;
    text-align: center !important;
    gap: 15px !important;
  }
  .exhibition-item img {
    margin: 0 auto !important;
  }

  /* Market icons mobile */
  .market-icon {
    font-size: 50px !important;
    margin-bottom: 15px !important;
  }

  /* CTA title mobile */
  .cta-title {
    font-size: 28px !important;
  }

  /* Timeline content mobile */
  .timeline-content {
    padding: 20px !important;
  }

  /* Featured seller mobile */
  .featured-seller-info h3 {
    font-size: 22px !important;
  }

  .featured-seller-info span {
    padding: 6px 14px !important;
    font-size: 12px !important;
  }

  /* Reduce card padding on mobile */
  .about-brands-grid > div,
  .about-markets-grid > div {
    padding: 25px 20px !important;
  }

  .exhibition-item {
    padding: 20px !important;
  }
}

@media (max-width: 480px) {
  .filter-btn {
    padding: 8px 16px;
    font-size: 12px;
    gap: 6px;
  }

  .product-filter {
    gap: 8px;
    margin-bottom: 35px;
  }

  .hero-slide {
    min-height: 420px;
    padding: 40px 0;
  }

  .hero-badge {
    font-size: 11px;
    padding: 5px 14px;
  }

  .hero-title {
    font-size: 24px;
    margin-bottom: 12px;
  }

  .hero-subtitle {
    font-size: 14px;
    margin-bottom: 20px;
  }

  .hero-btn {
    padding: 10px 28px;
    font-size: 14px;
  }

  .hero-stats {
    gap: 10px;
    margin-top: 25px;
  }

  .hero-stat {
    padding: 10px 6px;
  }

  .hero-stat-number {
    font-size: 24px;
  }

  .hero-stat-label {
    font-size: 10px;
  }

  .section-header h2 {
    font-size: 28px;
  }

  .about-stats {
    grid-template-columns: 1fr;
  }

  .about-stat-grid {
    grid-template-columns: 1fr 1fr;
  }

  .section {
    padding: 50px 0;
  }

  .page-banner {
    padding: 40px 0 !important;
  }
  .page-banner-title {
    font-size: 26px !important;
  }

  .section-title {
    font-size: 24px !important;
  }

  .brand-name {
    font-size: 36px !important;
  }

  .warehouse-stat {
    font-size: 32px !important;
  }

  .market-icon {
    font-size: 40px !important;
  }

  .cta-title {
    font-size: 24px !important;
  }

  .timeline-content {
    padding: 15px !important;
  }

  .timeline-item {
    padding-left: 70px !important;
    margin-bottom: 40px !important;
  }

  .timeline-year {
    left: 25px !important;
    width: 50px !important;
    height: 50px !important;
    font-size: 14px !important;
  }

  .about-timeline::before {
    left: 25px !important;
  }

  .featured-seller {
    padding: 15px !important;
    gap: 20px !important;
    margin-bottom: 40px !important;
  }

  .featured-seller-info h3 {
    font-size: 20px !important;
  }

  .stat-number {
    font-size: 20px !important;
  }

  .info-card {
    padding: 25px 15px !important;
  }

  .featured-seller-info span {
    padding: 5px 12px !important;
    font-size: 11px !important;
  }
}

/* ===== Animations ===== */
@keyframes fadeInUp {
  from {
    opacity: 0;
    transform: translateY(30px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.fade-in-up {
  animation: fadeInUp 0.6s ease forwards;
}

/* ===== Product Detail Page ===== */
.product-detail-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 60px;
  margin-bottom: 60px;
}

.product-gallery {
  position: relative;
}

.product-main-img {
  width: 100%;
  height: 450px;
  background: var(--off-white);
  border-radius: 8px;
  display: flex;
  align-items: center;
  justify-content: center;
  border: 1px solid var(--border-gray);
  margin-bottom: 20px;
}

.product-main-img img {
  max-width: 90%;
  max-height: 90%;
  object-fit: contain;
}

.product-thumbnails {
  display: flex;
  gap: 15px;
}

.product-thumb {
  width: 100px;
  height: 100px;
  background: var(--off-white);
  border-radius: 6px;
  display: flex;
  align-items: center;
  justify-content: center;
  border: 2px solid var(--border-gray);
  cursor: pointer;
  transition: var(--transition);
}

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

.product-info h1 {
  font-size: 32px;
  font-weight: 800;
  color: var(--text-dark);
  margin-bottom: 15px;
  text-transform: uppercase;
}

.product-info .oe-number {
  font-size: 16px;
  color: var(--brand-blue);
  font-weight: 700;
  margin-bottom: 20px;
  padding: 10px 20px;
  background: var(--light-gray);
  border-radius: 6px;
  display: inline-block;
}

.product-info .price {
  font-size: 36px;
  font-weight: 800;
  color: var(--brand-orange);
  margin-bottom: 20px;
}

.product-info .desc {
  font-size: 15px;
  color: var(--text-gray);
  line-height: 1.8;
  margin-bottom: 25px;
}

.product-specs {
  margin-bottom: 30px;
}

.product-specs h3 {
  font-size: 18px;
  font-weight: 700;
  color: var(--text-dark);
  margin-bottom: 15px;
  text-transform: uppercase;
}

.spec-item {
  display: flex;
  justify-content: space-between;
  padding: 12px 0;
  border-bottom: 1px solid var(--border-gray);
}

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

.spec-label {
  font-weight: 600;
  color: var(--text-dark);
}

.spec-value {
  color: var(--metal-gray);
}

/* ===== Breadcrumb ===== */
.breadcrumb {
  background: var(--light-gray);
  padding: 15px 0;
  margin-top: 80px;
}

.breadcrumb ul {
  display: flex;
  gap: 10px;
  align-items: center;
}

.breadcrumb ul li {
  font-size: 14px;
  color: var(--metal-gray);
}

.breadcrumb ul li a {
  color: var(--brand-blue);
}

.breadcrumb ul li a:hover {
  color: var(--brand-orange);
}

.breadcrumb ul li::after {
  content: '>';
  margin-left: 10px;
  color: var(--metal-light);
}

.breadcrumb ul li:last-child::after {
  display: none;
}

/* ===== SEO Hidden Content ===== */
.seo-content {
  position: absolute;
  left: -9999px;
  width: 1px;
  height: 1px;
  overflow: hidden;
}

/* ===== Loading Spinner ===== */
.loading-spinner {
  display: inline-block;
  width: 40px;
  height: 40px;
  border: 4px solid var(--border-gray);
  border-top: 4px solid var(--brand-orange);
  border-radius: 50%;
  animation: spin 1s linear infinite;
}

@keyframes spin {
  0% { transform: rotate(0deg); }
  100% { transform: rotate(360deg); }
}

/* ===== Back to Top Button ===== */
.back-to-top {
  position: fixed;
  bottom: 100px;
  right: 30px;
  width: 50px;
  height: 50px;
  background: var(--brand-blue);
  color: var(--white);
  border: none;
  border-radius: 50%;
  font-size: 20px;
  cursor: pointer;
  box-shadow: var(--shadow-md);
  transition: var(--transition);
  display: none;
  align-items: center;
  justify-content: center;
  z-index: 998;
}

.back-to-top.visible {
  display: flex;
}

.back-to-top:hover {
  background: var(--brand-orange);
  transform: translateY(-3px);
}