/* COVSE — B2B Children's Drawing Board Website */

:root {
  --color-primary: #1a5f7a;
  --color-primary-dark: #134a61;
  --color-primary-light: #e8f4f8;
  --color-accent: #f4a261;
  --color-accent-hover: #e8924d;
  --color-text: #2d3436;
  --color-text-muted: #636e72;
  --color-bg: #ffffff;
  --color-bg-alt: #f8fafb;
  --color-border: #e1e8ed;
  --font-sans: 'DM Sans', system-ui, -apple-system, sans-serif;
  --font-display: 'Outfit', var(--font-sans);
  --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.06);
  --shadow-md: 0 4px 20px rgba(26, 95, 122, 0.1);
  --shadow-lg: 0 12px 40px rgba(26, 95, 122, 0.15);
  --radius: 12px;
  --radius-lg: 20px;
  --max-width: 1200px;
  --header-height: 72px;
  --transition: 0.25s ease;
}

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

html {
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-sans);
  font-size: 16px;
  line-height: 1.6;
  color: var(--color-text);
  background: var(--color-bg);
}

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

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

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

ul {
  list-style: none;
}

.container {
  width: 100%;
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 24px;
}

/* Typography */
h1, h2, h3, h4 {
  font-family: var(--font-display);
  font-weight: 600;
  line-height: 1.25;
  color: var(--color-text);
}

h1 { font-size: clamp(2rem, 5vw, 3.25rem); }
h2 { font-size: clamp(1.75rem, 3vw, 2.25rem); }
h3 { font-size: 1.35rem; }

.section-label {
  display: inline-block;
  font-size: 0.8rem;
  font-weight: 600;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--color-accent);
  margin-bottom: 12px;
}

.section-header {
  text-align: center;
  max-width: 640px;
  margin: 0 auto 48px;
}

.section-header p {
  color: var(--color-text-muted);
  margin-top: 16px;
  font-size: 1.05rem;
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 14px 28px;
  font-family: var(--font-sans);
  font-size: 0.95rem;
  font-weight: 600;
  border-radius: 8px;
  border: 2px solid transparent;
  cursor: pointer;
  transition: all var(--transition);
}

.btn-primary {
  background: var(--color-primary);
  color: #fff;
}

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

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

.btn-outline:hover {
  background: var(--color-primary);
  color: #fff;
}

.btn-accent {
  background: var(--color-accent);
  color: #fff;
}

.btn-accent:hover {
  background: var(--color-accent-hover);
  color: #fff;
}

/* Header */
.site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  height: var(--header-height);
  background: rgba(255, 255, 255, 0.95);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--color-border);
}

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

.logo {
  display: flex;
  align-items: center;
  gap: 10px;
  font-family: var(--font-display);
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--color-primary);
  letter-spacing: 0.04em;
}

.logo-mark {
  width: 36px;
  height: 36px;
  background: linear-gradient(135deg, var(--color-primary), var(--color-accent));
  border-radius: 8px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: #fff;
  font-size: 0.85rem;
  font-weight: 700;
}

.logo:hover {
  color: var(--color-primary);
}

.main-nav ul {
  display: flex;
  gap: 32px;
}

.main-nav a {
  font-size: 0.95rem;
  font-weight: 500;
  color: var(--color-text);
  position: relative;
  padding: 4px 0;
}

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

.main-nav a:hover,
.main-nav a.active {
  color: var(--color-primary);
}

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

.header-cta .btn {
  padding: 10px 20px;
  font-size: 0.9rem;
}

.menu-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 8px;
}

.menu-toggle span {
  display: block;
  width: 24px;
  height: 2px;
  background: var(--color-text);
  transition: var(--transition);
}

/* Hero */
.hero {
  position: relative;
  min-height: 88vh;
  display: flex;
  align-items: center;
  margin-top: var(--header-height);
  overflow: hidden;
}

.hero-bg {
  position: absolute;
  inset: 0;
  z-index: 0;
}

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

.hero-bg::after {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(105deg, rgba(26, 95, 122, 0.88) 0%, rgba(26, 95, 122, 0.55) 50%, rgba(26, 95, 122, 0.25) 100%);
}

.hero-content {
  position: relative;
  z-index: 1;
  max-width: 620px;
  color: #fff;
  padding: 80px 0;
}

.hero-content h1 {
  color: #fff;
  margin-bottom: 20px;
}

.hero-content p {
  font-size: 1.15rem;
  opacity: 0.92;
  margin-bottom: 32px;
  line-height: 1.7;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
}

.hero-actions .btn-outline {
  color: #fff;
  border-color: rgba(255, 255, 255, 0.7);
}

.hero-actions .btn-outline:hover {
  background: #fff;
  color: var(--color-primary);
  border-color: #fff;
}

.hero-stats {
  display: flex;
  gap: 40px;
  margin-top: 48px;
  padding-top: 32px;
  border-top: 1px solid rgba(255, 255, 255, 0.25);
}

.hero-stat strong {
  display: block;
  font-family: var(--font-display);
  font-size: 1.75rem;
  font-weight: 700;
}

.hero-stat span {
  font-size: 0.85rem;
  opacity: 0.8;
}

/* Page Hero (inner pages) */
.page-hero {
  margin-top: var(--header-height);
  padding: 64px 0;
  background: linear-gradient(135deg, var(--color-primary-light) 0%, var(--color-bg) 100%);
  border-bottom: 1px solid var(--color-border);
}

.page-hero h1 {
  margin-bottom: 12px;
}

.page-hero p {
  color: var(--color-text-muted);
  font-size: 1.1rem;
  max-width: 560px;
}

.page-hero-company {
  font-weight: 600;
  color: var(--color-text);
  margin-bottom: 8px;
}

.breadcrumb {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  font-size: 0.875rem;
  margin-bottom: 20px;
  color: var(--color-text-muted);
}

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

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

/* Sections */
section {
  padding: 80px 0;
}

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

/* Features Grid */
.features-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 28px;
}

.feature-card {
  padding: 32px;
  background: var(--color-bg);
  border-radius: var(--radius);
  border: 1px solid var(--color-border);
  transition: all var(--transition);
}

.feature-card:hover {
  box-shadow: var(--shadow-md);
  transform: translateY(-4px);
}

.feature-icon {
  width: 52px;
  height: 52px;
  background: var(--color-primary-light);
  border-radius: 12px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.5rem;
  margin-bottom: 20px;
}

.feature-card h3 {
  margin-bottom: 10px;
}

.feature-card p {
  color: var(--color-text-muted);
  font-size: 0.95rem;
}

/* Product Cards */
.products-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(340px, 1fr));
  gap: 32px;
}

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

.product-card:hover {
  box-shadow: var(--shadow-lg);
  transform: translateY(-6px);
}

.product-card-image {
  position: relative;
  aspect-ratio: 4 / 3;
  overflow: hidden;
}

.product-card-image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.5s ease;
}

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

.product-card-badge {
  position: absolute;
  top: 16px;
  left: 16px;
  background: var(--color-accent);
  color: #fff;
  font-size: 0.75rem;
  font-weight: 600;
  padding: 4px 12px;
  border-radius: 20px;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.product-card-body {
  padding: 24px;
}

.product-card-body h3 {
  margin-bottom: 8px;
}

.product-card-body h3 a {
  color: var(--color-text);
}

.product-card-body h3 a:hover {
  color: var(--color-primary);
}

.product-card-body p {
  color: var(--color-text-muted);
  font-size: 0.95rem;
  margin-bottom: 16px;
}

.product-card-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: 20px;
}

.product-tag {
  font-size: 0.75rem;
  padding: 4px 10px;
  background: var(--color-primary-light);
  color: var(--color-primary);
  border-radius: 4px;
  font-weight: 500;
}

.product-card-link {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-weight: 600;
  font-size: 0.95rem;
}

.product-card-link::after {
  content: '→';
  transition: transform var(--transition);
}

.product-card-link:hover::after {
  transform: translateX(4px);
}

/* Product Detail */
.product-detail {
  padding: 48px 0 0;
}

.product-detail-grid {
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  gap: 48px;
  align-items: start;
}

.product-gallery {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.product-gallery-main {
  border-radius: var(--radius-lg);
  overflow: hidden;
  aspect-ratio: 4 / 3;
  box-shadow: var(--shadow-md);
  background: var(--color-bg-alt);
}

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

.product-gallery-thumbs {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 10px;
}

.gallery-thumb {
  padding: 0;
  border: 2px solid transparent;
  border-radius: 8px;
  overflow: hidden;
  cursor: pointer;
  aspect-ratio: 4 / 3;
  background: var(--color-bg-alt);
  transition: border-color var(--transition), opacity var(--transition);
}

.gallery-thumb:hover {
  border-color: var(--color-primary-light);
}

.gallery-thumb.active {
  border-color: var(--color-primary);
}

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

.product-info h1 {
  margin-bottom: 12px;
}

.product-series {
  color: var(--color-accent);
  font-weight: 600;
  font-size: 0.85rem;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  margin-bottom: 8px;
}

.product-model {
  font-size: 0.95rem;
  color: var(--color-text-muted);
  margin-bottom: 20px;
}

.product-model strong {
  color: var(--color-text);
  font-weight: 600;
}

.product-info .lead {
  font-size: 1.05rem;
  color: var(--color-text-muted);
  margin-bottom: 28px;
  line-height: 1.7;
}

.product-highlights {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-bottom: 32px;
}

.highlight-pill {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 8px 14px;
  background: var(--color-primary-light);
  color: var(--color-primary);
  border-radius: 6px;
  font-size: 0.85rem;
  font-weight: 500;
}

.product-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

.product-actions .btn {
  flex: 1;
  min-width: 160px;
}

/* CMS rich content (product & news detail body) */
.product-detail-content {
  padding: 0 0 80px;
  background: var(--color-bg);
}

.rich-content {
  width: 100%;
  background: var(--color-bg);
  padding: 48px 0 0;
  border-top: 1px solid var(--color-border);
}

.rich-content h2 {
  font-size: 1.5rem;
  margin: 32px 0 16px;
}

.rich-content h2:first-child {
  margin-top: 0;
}

.rich-content h3 {
  font-size: 1.15rem;
  margin: 24px 0 12px;
}

.rich-content p {
  color: var(--color-text-muted);
  margin-bottom: 16px;
  line-height: 1.75;
}

.rich-content ul,
.rich-content ol {
  margin: 0 0 20px 24px;
  color: var(--color-text-muted);
}

.rich-content li {
  margin-bottom: 8px;
  line-height: 1.6;
}

.rich-content img {
  border-radius: var(--radius);
  margin: 24px 0;
}

.rich-content table {
  width: 100%;
  border-collapse: collapse;
  margin: 20px 0;
  font-size: 0.95rem;
}

.rich-content table th,
.rich-content table td {
  padding: 12px 16px;
  border: 1px solid var(--color-border);
  text-align: left;
}

.rich-content table th {
  background: var(--color-primary-light);
  color: var(--color-primary);
  font-weight: 600;
}

.specs-table {
  width: 100%;
  border-collapse: collapse;
}

.specs-table tr {
  border-bottom: 1px solid var(--color-border);
}

.specs-table td {
  padding: 12px 0;
  font-size: 0.95rem;
}

.specs-table td:first-child {
  color: var(--color-text-muted);
  width: 40%;
}

/* Related Products */
.related-products {
  padding-top: 0;
}

.related-products h2 {
  margin-bottom: 32px;
}

/* About */
.about-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 48px;
  align-items: center;
}

.about-image {
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-md);
}

.about-content p {
  color: var(--color-text-muted);
  margin-bottom: 16px;
}

.about-content p:last-of-type {
  margin-bottom: 24px;
}

.values-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
  margin-top: 48px;
}

.value-item {
  text-align: center;
  padding: 28px 20px;
}

.value-item .value-num {
  font-family: var(--font-display);
  font-size: 2.5rem;
  font-weight: 700;
  color: var(--color-primary);
  line-height: 1;
}

.value-item .value-label {
  font-size: 0.9rem;
  color: var(--color-text-muted);
  margin-top: 8px;
}

/* Timeline / Milestones */
.timeline {
  max-width: 700px;
  margin: 0 auto;
}

.timeline-item {
  display: flex;
  gap: 24px;
  padding-bottom: 32px;
  position: relative;
}

.timeline-item:not(:last-child)::before {
  content: '';
  position: absolute;
  left: 11px;
  top: 28px;
  bottom: 0;
  width: 2px;
  background: var(--color-border);
}

.timeline-dot {
  flex-shrink: 0;
  width: 24px;
  height: 24px;
  background: var(--color-primary);
  border-radius: 50%;
  border: 4px solid var(--color-primary-light);
}

.timeline-content h4 {
  margin-bottom: 6px;
}

.timeline-content p {
  color: var(--color-text-muted);
  font-size: 0.95rem;
}

/* News */
.news-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(340px, 1fr));
  gap: 32px;
}

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

.news-card:hover {
  box-shadow: var(--shadow-md);
}

.news-card-image {
  aspect-ratio: 16 / 9;
  overflow: hidden;
}

.news-card-image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.5s ease;
}

.news-card:hover .news-card-image img {
  transform: scale(1.04);
}

.news-card-body {
  padding: 24px;
}

.news-date {
  font-size: 0.8rem;
  color: var(--color-accent);
  font-weight: 600;
  margin-bottom: 8px;
}

.news-card-body h3 {
  margin-bottom: 10px;
  font-size: 1.15rem;
}

.news-card-body h3 a {
  color: var(--color-text);
}

.news-card-body h3 a:hover {
  color: var(--color-primary);
}

.news-card-body p {
  color: var(--color-text-muted);
  font-size: 0.95rem;
  margin-bottom: 16px;
}

.news-card-read-more {
  font-weight: 600;
  font-size: 0.9rem;
}

.news-card-read-more::after {
  content: ' \2192';
}

/* News Detail */
.news-detail {
  padding: 48px 0 80px;
}

.news-detail-header {
  max-width: 780px;
  margin-bottom: 32px;
}

.news-detail-header h1 {
  margin-top: 12px;
  margin-bottom: 16px;
}

.news-detail-meta {
  font-size: 0.9rem;
  color: var(--color-text-muted);
}

.news-detail .rich-content {
  padding-top: 0;
  border-top: none;
}

.news-detail-footer {
  margin-top: 48px;
  padding-top: 32px;
  border-top: 1px solid var(--color-border);
}

/* Contact */
.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1.2fr;
  gap: 48px;
}

.contact-info h3 {
  margin-bottom: 24px;
}

.contact-item {
  display: flex;
  gap: 16px;
  margin-bottom: 24px;
}

.contact-item-icon {
  width: 44px;
  height: 44px;
  background: var(--color-primary-light);
  border-radius: 10px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.2rem;
  flex-shrink: 0;
}

.contact-item h4 {
  font-size: 0.9rem;
  font-weight: 600;
  margin-bottom: 4px;
}

.contact-item p {
  color: var(--color-text-muted);
  font-size: 0.95rem;
}

.contact-form {
  background: var(--color-bg-alt);
  padding: 36px;
  border-radius: var(--radius-lg);
  border: 1px solid var(--color-border);
}

.form-notice {
  display: flex;
  gap: 14px;
  align-items: flex-start;
  padding: 16px 18px;
  margin-bottom: 24px;
  border-radius: 10px;
  border: 1px solid transparent;
}

.form-notice--success {
  background: #ecfdf5;
  border-color: #6ee7b7;
  color: #065f46;
}

.form-notice--error {
  background: #fef2f2;
  border-color: #fecaca;
  color: #991b1b;
}

.form-notice-icon {
  flex-shrink: 0;
  width: 28px;
  height: 28px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  font-size: 1rem;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.65);
}

.form-notice-title {
  font-weight: 700;
  font-size: 1rem;
  margin: 0 0 4px;
}

.form-notice-text {
  margin: 0;
  font-size: 0.925rem;
  line-height: 1.5;
}

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

.form-group label {
  display: block;
  font-size: 0.875rem;
  font-weight: 600;
  margin-bottom: 8px;
}

.form-group input,
.form-group select,
.form-group textarea {
  width: 100%;
  padding: 12px 16px;
  font-family: var(--font-sans);
  font-size: 0.95rem;
  border: 1px solid var(--color-border);
  border-radius: 8px;
  background: var(--color-bg);
  transition: border-color var(--transition);
}

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

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

.form-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
}

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

.captcha-row .captcha-input {
  width: 50%;
  flex: 0 0 calc(50% - 6px);
  max-width: calc(50% - 6px);
}

.captcha-aside {
  display: flex;
  align-items: center;
  gap: 8px;
  flex: 1;
  min-width: 0;
}

.captcha-image {
  display: block;
  flex-shrink: 0;
  border-radius: 8px;
  border: 1px solid var(--color-border);
  background: #f5f7fa;
  cursor: pointer;
}

.captcha-refresh {
  flex-shrink: 0;
  width: 40px;
  height: 40px;
  padding: 0;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border: 1px solid var(--color-border);
  border-radius: 8px;
  background: var(--color-bg);
  color: var(--color-primary);
  cursor: pointer;
  transition: border-color var(--transition), color var(--transition);
}

.captcha-refresh:hover {
  border-color: var(--color-primary);
  color: var(--color-primary-dark);
}

.captcha-refresh:disabled {
  opacity: 0.5;
  cursor: wait;
}

.captcha-input.is-invalid {
  border-color: #e74c3c;
}

.captcha-field-error {
  margin: 10px 0 0;
  font-size: 0.875rem;
  font-weight: 600;
  color: #c0392b;
}

@media (max-width: 640px) {
  .captcha-row {
    flex-wrap: wrap;
  }

  .captcha-row .captcha-input {
    width: 100%;
    flex: 1 1 100%;
    max-width: 100%;
  }
}

/* CTA Banner */
.cta-banner {
  background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-dark) 100%);
  color: #fff;
  padding: 64px 0;
  text-align: center;
}

.cta-banner h2 {
  color: #fff;
  margin-bottom: 16px;
}

.cta-banner p {
  opacity: 0.9;
  max-width: 520px;
  margin: 0 auto 28px;
}

/* Footer */
.site-footer {
  background: #1a2332;
  color: rgba(255, 255, 255, 0.75);
  padding: 64px 0 24px;
}

.footer-grid {
  display: grid;
  grid-template-columns: 1.5fr 1fr 1fr 1fr;
  gap: 40px;
  margin-bottom: 48px;
}

.footer-brand .logo {
  color: #fff;
  margin-bottom: 16px;
}

.footer-company-name {
  font-size: 0.875rem;
  font-weight: 600;
  color: rgba(255, 255, 255, 0.92);
  margin-bottom: 10px;
  line-height: 1.5;
}

.footer-brand p {
  font-size: 0.9rem;
  line-height: 1.7;
}

.footer-col h4 {
  color: #fff;
  font-size: 0.95rem;
  margin-bottom: 20px;
}

.footer-col ul li {
  margin-bottom: 10px;
}

.footer-col a {
  color: rgba(255, 255, 255, 0.65);
  font-size: 0.9rem;
}

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

.footer-bottom {
  padding-top: 24px;
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 16px;
  font-size: 0.85rem;
}

/* OEM Section */
.oem-steps {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
  counter-reset: step;
}

.oem-step {
  text-align: center;
  padding: 24px 16px;
  position: relative;
}

.oem-step::before {
  counter-increment: step;
  content: counter(step);
  display: flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  background: var(--color-primary);
  color: #fff;
  font-weight: 700;
  border-radius: 50%;
  margin: 0 auto 16px;
}

.oem-step h4 {
  margin-bottom: 8px;
  font-size: 1rem;
}

.oem-step p {
  font-size: 0.875rem;
  color: var(--color-text-muted);
}

/* Applications strip */
.applications {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 16px;
}

.app-badge {
  padding: 12px 24px;
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: 40px;
  font-size: 0.9rem;
  font-weight: 500;
}

/* Responsive */
@media (max-width: 992px) {
  .product-detail-grid,
  .about-grid,
  .contact-grid {
    grid-template-columns: 1fr;
  }

  .product-gallery-thumbs {
    grid-template-columns: repeat(4, 1fr);
  }

  .rich-content {
    padding-top: 32px;
  }

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

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

  .values-grid {
    grid-template-columns: repeat(3, 1fr);
  }
}

@media (max-width: 768px) {
  .menu-toggle {
    display: flex;
  }

  .main-nav {
    position: fixed;
    top: var(--header-height);
    left: 0;
    right: 0;
    background: var(--color-bg);
    border-bottom: 1px solid var(--color-border);
    padding: 24px;
    transform: translateY(-120%);
    opacity: 0;
    visibility: hidden;
    transition: all var(--transition);
  }

  .main-nav.open {
    transform: translateY(0);
    opacity: 1;
    visibility: visible;
  }

  .main-nav ul {
    flex-direction: column;
    gap: 16px;
  }

  .header-cta {
    display: none;
  }

  .hero-stats {
    flex-wrap: wrap;
    gap: 24px;
  }

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

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

  .form-row {
    grid-template-columns: 1fr;
  }

  .oem-steps {
    grid-template-columns: 1fr;
  }

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

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

  .product-actions .btn {
    flex: 1 1 100%;
  }
}