/* ===================================
   Meta Intelligence - Smart Lock
   Enterprise Website Stylesheet
   Pure HTML/CSS/JS | Responsive
   =================================== */

/* CSS Variables */
:root {
  --primary: #0066CC;
  --primary-dark: #0052A3;
  --primary-light: #E6F2FF;
  --accent: #00A8E8;
  --text-dark: #1A1A2E;
  --text-body: #4A4A5A;
  --text-light: #6B7280;
  --bg-light: #F8FAFC;
  --bg-white: #FFFFFF;
  --border: #E2E8F0;
  --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
  --shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
  --shadow-lg: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 10px 10px -5px rgba(0, 0, 0, 0.04);
  --radius: 8px;
  --radius-lg: 16px;
  --transition: all 0.3s ease;
  --container: 1200px;
}

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

html {
  scroll-behavior: smooth;
}

body {
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
  color: var(--text-body);
  background: var(--bg-white);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

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

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

a:hover {
  color: var(--primary-dark);
}

ul {
  list-style: none;
}

/* Typography */
h1, h2, h3, h4, h5, h6 {
  color: var(--text-dark);
  line-height: 1.2;
  font-weight: 700;
}

.section-title {
  font-size: 2rem;
  text-align: center;
  margin-bottom: 0.5rem;
}

.section-subtitle {
  text-align: center;
  color: var(--text-light);
  margin-bottom: 3rem;
  font-size: 1.1rem;
}

.section-header {
  margin-bottom: 3rem;
}

/* Layout */
.container {
  width: 100%;
  max-width: var(--container);
  margin: 0 auto;
  padding: 0 1.5rem;
}

.section {
  padding: 5rem 0;
}

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

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  padding: 0.875rem 1.75rem;
  border-radius: var(--radius);
  font-weight: 600;
  font-size: 1rem;
  cursor: pointer;
  border: none;
  transition: var(--transition);
  text-align: center;
}

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

.btn-primary:hover {
  background: var(--primary-dark);
  color: var(--bg-white);
  transform: translateY(-2px);
  box-shadow: var(--shadow);
}

.btn-outline {
  background: transparent;
  color: var(--primary);
  border: 2px solid var(--primary);
}

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

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

.btn-white:hover {
  background: var(--bg-light);
  color: var(--primary-dark);
}

.btn-sm {
  padding: 0.55rem 1.15rem;
  font-size: 0.9rem;
  line-height: 1.5;
  border-radius: var(--radius);
}

/* Header */
.header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  background: rgba(255, 255, 255, 0.95);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--border);
  transition: var(--transition);
}

.header.scrolled {
  box-shadow: var(--shadow);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 80px;
}

.logo {
  display: flex;
  align-items: center;
  gap: 0.65rem;
  font-weight: 800;
  font-size: 1.5rem;
  color: var(--primary);
  white-space: nowrap;
}

.logo-img {
  height: 40px;
  width: auto;
  display: block;
  object-fit: contain;
}

.logo-text {
  color: var(--primary);
  letter-spacing: -0.01em;
}

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

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

/* Navigation */
.nav {
  display: flex;
  align-items: center;
  gap: 2rem;
  margin-left: 3rem;
}

.nav-link {
  color: var(--text-body);
  font-weight: 500;
  font-size: 0.95rem;
  position: relative;
  padding: 0.5rem 0;
}

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

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

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

.nav-link.has-dropdown {
  display: flex;
  align-items: center;
  gap: 0.25rem;
}

.dropdown {
  position: relative;
}

.dropdown-menu {
  position: absolute;
  top: 100%;
  left: 0;
  min-width: 220px;
  background: var(--bg-white);
  border-radius: var(--radius);
  box-shadow: var(--shadow-lg);
  padding: 0.75rem 0;
  opacity: 0;
  visibility: hidden;
  transform: translateY(10px);
  transition: var(--transition);
  border: 1px solid var(--border);
}

.dropdown:hover .dropdown-menu {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}

.dropdown-menu a {
  display: block;
  padding: 0.625rem 1.25rem;
  color: var(--text-body);
  font-size: 0.9rem;
}

.dropdown-menu a:hover {
  background: var(--primary-light);
  color: var(--primary);
}

.mobile-menu-btn {
  display: none;
  background: none;
  border: none;
  font-size: 1.5rem;
  color: var(--text-dark);
  cursor: pointer;
}

/* Hero */
.hero {
  padding: 10rem 0 6rem;
  background: linear-gradient(135deg, var(--bg-white) 0%, var(--primary-light) 100%);
  position: relative;
  overflow: hidden;
}

.hero::before {
  content: '';
  position: absolute;
  top: -50%;
  right: -10%;
  width: 600px;
  height: 600px;
  background: radial-gradient(circle, rgba(0, 102, 204, 0.08) 0%, transparent 70%);
  border-radius: 50%;
}

.hero-inner {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 4rem;
  align-items: center;
  position: relative;
  z-index: 1;
}

.hero-content {
  max-width: 600px;
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  background: var(--primary-light);
  color: var(--primary);
  padding: 0.5rem 1rem;
  border-radius: 50px;
  font-size: 0.875rem;
  font-weight: 600;
  margin-bottom: 1.5rem;
}

.hero-title {
  font-size: 3rem;
  margin-bottom: 1.5rem;
  line-height: 1.1;
}

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

.hero-desc {
  font-size: 1.125rem;
  color: var(--text-light);
  margin-bottom: 2rem;
}

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

.hero-image {
  position: relative;
}

.hero-image img {
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-lg);
}

.hero-stats {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 2rem;
  margin-top: 4rem;
  padding-top: 3rem;
  border-top: 1px solid rgba(0, 102, 204, 0.15);
}

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

.hero-stat-number {
  font-size: 2.5rem;
  font-weight: 800;
  color: var(--primary);
  line-height: 1;
}

.hero-stat-label {
  font-size: 0.95rem;
  color: var(--text-light);
  margin-top: 0.5rem;
}

/* Cards */
.card {
  background: var(--bg-white);
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-sm);
  border: 1px solid var(--border);
  transition: var(--transition);
}

.card:hover {
  transform: translateY(-5px);
  box-shadow: var(--shadow-lg);
}

.card-img {
  width: 100%;
  aspect-ratio: 4/3;
  object-fit: cover;
  background: var(--bg-light);
}

.card-body {
  padding: 1.5rem;
}

.card-title {
  font-size: 1.25rem;
  margin-bottom: 0.5rem;
}

.card-text {
  color: var(--text-light);
  font-size: 0.95rem;
  margin-bottom: 1rem;
}

.card-link {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  font-weight: 600;
  font-size: 0.95rem;
}

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

.grid-3 {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 2rem;
}

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

/* Feature / Advantage */
.advantage-item {
  text-align: center;
  padding: 2rem;
  background: var(--bg-white);
  border-radius: var(--radius-lg);
  border: 1px solid var(--border);
  transition: var(--transition);
}

.advantage-item:hover {
  border-color: var(--primary);
  transform: translateY(-5px);
  box-shadow: var(--shadow);
}

.advantage-icon {
  width: 70px;
  height: 70px;
  background: var(--primary-light);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto 1.25rem;
  color: var(--primary);
  font-size: 1.75rem;
}

.advantage-title {
  font-size: 1.25rem;
  margin-bottom: 0.75rem;
}

.advantage-text {
  color: var(--text-light);
  font-size: 0.95rem;
}

/* Products */
.product-card {
  background: var(--bg-white);
  border-radius: var(--radius-lg);
  border: 1px solid var(--border);
  overflow: hidden;
  transition: var(--transition);
}

.product-card:hover {
  box-shadow: var(--shadow-lg);
  transform: translateY(-5px);
  border-color: var(--primary);
}

.product-img {
  width: 100%;
  aspect-ratio: 3/4;
  object-fit: cover;
  background: var(--bg-light);
  border-bottom: 1px solid var(--border);
}

.product-info {
  padding: 1.5rem;
}

.product-name {
  font-size: 1.15rem;
  margin-bottom: 0.25rem;
}

.product-model {
  display: inline-block;
  background: var(--primary-light);
  color: var(--primary);
  padding: 0.25rem 0.75rem;
  border-radius: 50px;
  font-size: 0.8rem;
  font-weight: 600;
  margin-bottom: 0.75rem;
}

.product-specs {
  font-size: 0.85rem;
  color: var(--text-light);
}

.product-specs li {
  display: flex;
  justify-content: space-between;
  padding: 0.35rem 0;
  border-bottom: 1px dashed var(--border);
}

.product-specs li:last-child {
  border-bottom: none;
}

/* Product Image-Only Grid */
.product-image-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 2rem;
}

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

.product-image-grid.single {
  grid-template-columns: 1fr;
  max-width: 760px;
  margin: 0 auto;
}

.product-image-link {
  display: block;
  background: var(--bg-white);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-sm);
  transition: var(--transition);
  aspect-ratio: 4 / 3;
}

.product-image-link:hover {
  transform: translateY(-5px);
  box-shadow: var(--shadow-lg);
  border-color: var(--primary);
}

.product-image-link img {
  width: 100%;
  height: 100%;
  object-fit: contain;
  background: var(--bg-light);
  display: block;
}

@media (max-width: 1024px) {
  .product-image-grid,
  .product-image-grid.cols-3 {
    grid-template-columns: repeat(3, 1fr);
  }
}

@media (max-width: 768px) {
  .product-image-grid,
  .product-image-grid.cols-3 {
    grid-template-columns: repeat(2, 1fr);
    gap: 1.25rem;
  }
}

@media (max-width: 480px) {
  .product-image-grid,
  .product-image-grid.cols-3 {
    grid-template-columns: 1fr;
  }
}

/* Spec Table */
.spec-table {
  width: 100%;
  border-collapse: collapse;
  margin: 1.5rem 0;
  background: var(--bg-white);
  border-radius: var(--radius);
  overflow: hidden;
  box-shadow: var(--shadow-sm);
  border: 1px solid var(--border);
}

.spec-table th,
.spec-table td {
  padding: 1rem 1.25rem;
  text-align: left;
  border-bottom: 1px solid var(--border);
}

.spec-table th {
  background: var(--primary-light);
  color: var(--primary);
  font-weight: 600;
  width: 35%;
}

.spec-table tr:last-child td {
  border-bottom: none;
}

.spec-table tr:hover td {
  background: var(--bg-light);
}

/* Patent Page */
.patent-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.5rem;
}

.patent-card {
  background: var(--bg-white);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
  transition: var(--transition);
}

.patent-card:hover {
  box-shadow: var(--shadow);
  transform: translateY(-3px);
}

.patent-card img {
  width: 100%;
  aspect-ratio: 3/4;
  object-fit: contain;
  background: var(--bg-light);
  padding: 0.5rem;
}

.patent-card-body {
  padding: 1rem;
  text-align: center;
}

.patent-card-title {
  font-size: 1rem;
  color: var(--text-dark);
  margin-bottom: 0.25rem;
}

.patent-card-type {
  font-size: 0.85rem;
  color: var(--text-light);
}

/* About Page */
.about-hero {
  padding: 10rem 0 5rem;
  background: linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 100%);
  color: var(--bg-white);
  text-align: center;
}

.about-hero h1 {
  color: var(--bg-white);
  font-size: 2.75rem;
  margin-bottom: 1rem;
}

.about-hero p {
  font-size: 1.1rem;
  opacity: 0.9;
  max-width: 700px;
  margin: 0 auto;
}

.page-hero {
  padding: 10rem 0 4rem;
  background: linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 100%);
  color: var(--bg-white);
  text-align: center;
}

.page-hero h1 {
  color: var(--bg-white);
  font-size: 2.5rem;
  margin-bottom: 0.75rem;
}

.page-hero p {
  font-size: 1.1rem;
  opacity: 0.9;
  max-width: 700px;
  margin: 0 auto;
}

.breadcrumb {
  display: flex;
  justify-content: center;
  align-items: center;
  gap: 0.5rem;
  margin-top: 1.5rem;
  font-size: 0.9rem;
  opacity: 0.9;
}

.breadcrumb a {
  color: var(--bg-white);
  opacity: 0.9;
}

.breadcrumb a:hover {
  opacity: 1;
  text-decoration: underline;
}

.about-content h2 {
  font-size: 1.75rem;
  margin-bottom: 1.25rem;
  color: var(--primary);
}

.about-content p {
  margin-bottom: 1rem;
  color: var(--text-body);
}

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

.milestone-card {
  background: var(--bg-white);
  border: 1px solid var(--border);
  border-left: 4px solid var(--primary);
  border-radius: var(--radius);
  padding: 2rem;
  transition: var(--transition);
}

.milestone-card:hover {
  box-shadow: var(--shadow);
  transform: translateY(-3px);
}

.milestone-card h3 {
  color: var(--primary);
  font-size: 1.25rem;
  margin-bottom: 0.75rem;
}

.milestone-card p {
  color: var(--text-body);
  font-size: 0.95rem;
  line-height: 1.7;
}

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

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

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

.cert-card img {
  width: 100%;
  aspect-ratio: 3/4;
  object-fit: contain;
  margin-bottom: 1rem;
  border-radius: var(--radius);
  background: var(--bg-light);
}

.cert-card h3 {
  font-size: 1.1rem;
  margin-bottom: 0.25rem;
}

.cert-card p {
  font-size: 0.9rem;
  color: var(--text-light);
}

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

.stat-box {
  background: var(--bg-white);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 2rem;
  text-align: center;
}

.stat-box-number {
  font-size: 2.25rem;
  font-weight: 800;
  color: var(--primary);
  line-height: 1;
  margin-bottom: 0.5rem;
}

.stat-box-label {
  color: var(--text-light);
  font-size: 0.95rem;
}

/* Contact Form */
.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 4rem;
  align-items: start;
}

.contact-info h2 {
  font-size: 1.75rem;
  margin-bottom: 1rem;
}

.contact-info p {
  color: var(--text-light);
  margin-bottom: 2rem;
}

.contact-item {
  display: flex;
  gap: 1rem;
  margin-bottom: 1.5rem;
}

.contact-item-icon {
  width: 50px;
  height: 50px;
  background: var(--primary-light);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--primary);
  font-size: 1.25rem;
  flex-shrink: 0;
}

.contact-item h4 {
  font-size: 1.1rem;
  margin-bottom: 0.25rem;
}

.contact-item p {
  color: var(--text-light);
  font-size: 0.95rem;
  margin: 0;
}

.form-card {
  background: var(--bg-white);
  border-radius: var(--radius-lg);
  padding: 2.5rem;
  box-shadow: var(--shadow-lg);
  border: 1px solid var(--border);
}

.form-group {
  margin-bottom: 1.5rem;
}

.form-label {
  display: block;
  margin-bottom: 0.5rem;
  font-weight: 600;
  color: var(--text-dark);
  font-size: 0.95rem;
}

.form-control,
.form-select,
.form-textarea {
  width: 100%;
  padding: 0.875rem 1rem;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  font-size: 1rem;
  font-family: inherit;
  transition: var(--transition);
  background: var(--bg-white);
  color: var(--text-body);
}

.form-control:focus,
.form-select:focus,
.form-textarea:focus {
  outline: none;
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(0, 102, 204, 0.1);
}

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

.form-select {
  appearance: none;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' fill='%236B7280' viewBox='0 0 16 16'%3E%3Cpath d='M7.247 11.14 2.451 5.658C1.885 5.013 2.345 4 3.204 4h9.592a1 1 0 0 1 .753 1.659l-4.796 5.48a1 1 0 0 1-1.506 0z'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 1rem center;
  padding-right: 2.5rem;
}

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

.form-message {
  padding: 1rem;
  border-radius: var(--radius);
  margin-bottom: 1rem;
  display: none;
}

.form-message.success {
  background: #D1FAE5;
  color: #065F46;
  border: 1px solid #A7F3D0;
}

.form-message.error {
  background: #FEE2E2;
  color: #991B1B;
  border: 1px solid #FECACA;
}

.form-message.show {
  display: block;
}

/* Footer */
.footer {
  background: var(--text-dark);
  color: var(--bg-white);
  padding: 4rem 0 1.5rem;
}

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

.footer-brand p {
  color: rgba(255, 255, 255, 0.7);
  margin-top: 1rem;
  font-size: 0.95rem;
}

.footer-title {
  color: var(--bg-white);
  font-size: 1.1rem;
  margin-bottom: 1.25rem;
}

.footer-links li {
  margin-bottom: 0.75rem;
}

.footer-links a {
  color: rgba(255, 255, 255, 0.7);
  font-size: 0.95rem;
}

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

.footer-bottom {
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  padding-top: 1.5rem;
  text-align: center;
  color: rgba(255, 255, 255, 0.6);
  font-size: 0.9rem;
}

/* Category Cards */
.category-card {
  background: var(--bg-white);
  border-radius: var(--radius-lg);
  border: 1px solid var(--border);
  overflow: hidden;
  transition: var(--transition);
  display: flex;
  flex-direction: column;
}

.category-card:hover {
  box-shadow: var(--shadow-lg);
  transform: translateY(-5px);
  border-color: var(--primary);
}

.category-card-img {
  width: 100%;
  aspect-ratio: 16/10;
  object-fit: contain;
  background: var(--bg-light);
  padding: 1rem;
}

.category-card-body {
  padding: 1.5rem;
  flex: 1;
  display: flex;
  flex-direction: column;
}

.category-card-title {
  font-size: 1.25rem;
  margin-bottom: 0.5rem;
}

.category-card-text {
  color: var(--text-light);
  font-size: 0.95rem;
  margin-bottom: 1rem;
  flex: 1;
}

/* Product Detail */
.product-detail {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 3rem;
  align-items: start;
}

.product-detail-img {
  border-radius: var(--radius-lg);
  border: 1px solid var(--border);
  overflow: hidden;
  background: var(--bg-white);
}

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

.product-detail-info h1 {
  font-size: 2rem;
  margin-bottom: 0.5rem;
}

.product-detail-meta {
  display: flex;
  gap: 1rem;
  margin-bottom: 1.5rem;
  flex-wrap: wrap;
}

.product-detail-meta span {
  background: var(--primary-light);
  color: var(--primary);
  padding: 0.35rem 0.85rem;
  border-radius: 50px;
  font-size: 0.85rem;
  font-weight: 600;
}

/* Unlock Methods */
.unlock-methods {
  display: flex;
  gap: 0.75rem;
  flex-wrap: wrap;
  margin: 1.5rem 0;
}

.unlock-method {
  display: flex;
  align-items: center;
  gap: 0.4rem;
  background: var(--bg-light);
  border: 1px solid var(--border);
  padding: 0.4rem 0.75rem;
  border-radius: 50px;
  font-size: 0.85rem;
  color: var(--text-body);
}

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

.oem-card {
  background: var(--bg-white);
  border-radius: var(--radius);
  padding: 2rem;
  border: 1px solid var(--border);
  text-align: center;
  transition: var(--transition);
}

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

.oem-card-icon {
  font-size: 2.5rem;
  color: var(--primary);
  margin-bottom: 1rem;
}

.oem-card h3 {
  font-size: 1.2rem;
  margin-bottom: 0.5rem;
}

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

/* === Technical Capabilities — One-Stop Solutions === */
.section-tag {
  display: inline-block;
  background: var(--primary-light);
  color: var(--primary);
  padding: 0.4rem 1.1rem;
  border-radius: 50px;
  font-size: 0.8rem;
  font-weight: 700;
  margin-bottom: 1rem;
  letter-spacing: 1px;
  text-transform: uppercase;
}

/* 6-step capability flow — clean circular timeline */
.cap-flow {
  display: grid;
  grid-template-columns: repeat(6, 1fr);
  gap: 1.5rem 1rem;
  margin-bottom: 4rem;
  position: relative;
}

.cap-flow::before {
  content: '';
  position: absolute;
  top: 2.5rem;
  left: 8%;
  right: 8%;
  height: 3px;
  background: linear-gradient(90deg, var(--primary) 0%, var(--accent) 100%);
  border-radius: 3px;
  z-index: 0;
}

.cap-flow-step {
  text-align: center;
  position: relative;
  z-index: 1;
  padding: 0 0.25rem;
}

.cap-flow-badge {
  width: 5rem;
  height: 5rem;
  background: var(--primary);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto 1rem;
  box-shadow: 0 6px 16px rgba(0, 102, 204, 0.25);
  position: relative;
  transition: var(--transition);
}

.cap-flow-step:hover .cap-flow-badge {
  transform: translateY(-4px) scale(1.05);
  box-shadow: 0 10px 24px rgba(0, 102, 204, 0.35);
  background: var(--primary-dark);
}

.cap-flow-badge i {
  font-size: 1.75rem;
  color: var(--bg-white);
}

.cap-flow-num {
  position: absolute;
  top: -0.25rem;
  right: -0.25rem;
  width: 1.6rem;
  height: 1.6rem;
  background: var(--bg-white);
  color: var(--primary);
  border: 2px solid var(--primary);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  font-size: 0.75rem;
  z-index: 2;
  box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
}

.cap-flow-step h4 {
  font-size: 0.95rem;
  color: var(--text-dark);
  font-weight: 700;
  line-height: 1.3;
  margin-bottom: 0;
}

/* Two detailed capability cards */
.cap-detail-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 2rem;
}

.cap-detail-card {
  background: var(--bg-white);
  border-radius: var(--radius-lg);
  padding: 2.5rem;
  border: 1px solid var(--border);
  border-top: 4px solid var(--primary);
  transition: var(--transition);
  position: relative;
  overflow: hidden;
}

.cap-detail-card::before {
  content: '';
  position: absolute;
  top: 0;
  right: 0;
  width: 120px;
  height: 120px;
  background: radial-gradient(circle, var(--primary-light) 0%, transparent 70%);
  opacity: 0.5;
  border-radius: 50%;
  transform: translate(40px, -40px);
}

.cap-detail-card:hover {
  box-shadow: var(--shadow-lg);
  transform: translateY(-4px);
}

.cap-detail-header {
  display: flex;
  align-items: center;
  gap: 1rem;
  margin-bottom: 1.5rem;
  padding-bottom: 1.25rem;
  border-bottom: 1px solid var(--border);
  position: relative;
  z-index: 1;
}

.cap-detail-icon {
  width: 56px;
  height: 56px;
  background: var(--primary);
  border-radius: var(--radius);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--bg-white);
  font-size: 1.6rem;
  flex-shrink: 0;
}

.cap-detail-header h3 {
  font-size: 1.4rem;
  color: var(--text-dark);
  margin-bottom: 0;
}

.cap-detail-list {
  list-style: none;
  padding: 0;
  margin: 0;
  position: relative;
  z-index: 1;
}

.cap-detail-list li {
  display: flex;
  align-items: flex-start;
  gap: 0.75rem;
  padding: 0.8rem 0;
  color: var(--text-body);
  font-size: 1rem;
  line-height: 1.5;
  border-bottom: 1px dashed var(--border);
}

.cap-detail-list li:last-child {
  border-bottom: none;
}

.cap-detail-list li i {
  color: var(--primary);
  font-size: 1.15rem;
  flex-shrink: 0;
  margin-top: 0.15rem;
}

.cap-detail-list li span {
  flex: 1;
}

.cap-detail-list li b {
  color: var(--text-dark);
  font-weight: 600;
}

/* CTA below capability detail cards */
.cap-cta {
  text-align: center;
  margin-top: 3rem;
}

.btn-lg {
  padding: 1.1rem 2.5rem;
  font-size: 1.1rem;
  border-radius: 50px;
}

/* Mobile Menu */
.mobile-menu {
  display: none;
  position: fixed;
  top: 80px;
  left: 0;
  right: 0;
  bottom: 0;
  background: var(--bg-white);
  z-index: 999;
  padding: 1.5rem;
  overflow-y: auto;
  border-top: 1px solid var(--border);
}

.mobile-menu.active {
  display: block;
}

.mobile-menu a {
  display: block;
  padding: 1rem 0;
  border-bottom: 1px solid var(--border);
  color: var(--text-dark);
  font-weight: 500;
}

.mobile-menu a:hover {
  color: var(--primary);
}

.mobile-submenu {
  padding-left: 1rem;
  margin-bottom: 0.5rem;
}

.mobile-submenu a {
  font-size: 0.95rem;
  padding: 0.65rem 0;
  border: none;
  color: var(--text-body);
}

/* Responsive */
@media (max-width: 1024px) {
  .hero-title {
    font-size: 2.5rem;
  }

  .grid-4 {
    grid-template-columns: repeat(3, 1fr);
  }

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

  .cap-flow {
    grid-template-columns: repeat(3, 1fr);
    gap: 1.75rem 1rem;
  }

  .cap-flow::before {
    display: none;
  }
}

@media (max-width: 768px) {
  .nav {
    display: none;
  }

  .mobile-menu-btn {
    display: block;
  }

  .hero-inner {
    grid-template-columns: 1fr;
    gap: 3rem;
    text-align: center;
  }

  .hero-content {
    max-width: 100%;
  }

  .hero-title {
    font-size: 2rem;
  }

  .hero-stats {
    grid-template-columns: 1fr;
    gap: 1.5rem;
  }

  .grid-2,
  .grid-3,
  .grid-4,
  .patent-grid,
  .cert-grid,
  .stats-grid,
  .oem-grid,
  .cap-detail-grid {
    grid-template-columns: 1fr;
  }

  .cap-flow {
    grid-template-columns: repeat(2, 1fr);
    gap: 1rem;
  }

  .cap-detail-card {
    padding: 1.75rem;
  }

  .contact-grid,
  .product-detail {
    grid-template-columns: 1fr;
    gap: 2rem;
  }

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

  .footer-grid {
    grid-template-columns: 1fr;
    gap: 2rem;
  }

  .section-title {
    font-size: 1.6rem;
  }

  .section {
    padding: 3rem 0;
  }

  .page-hero h1,
  .about-hero h1 {
    font-size: 2rem;
  }
}

@media (max-width: 480px) {
  .hero-title {
    font-size: 1.75rem;
  }

  .hero-buttons {
    flex-direction: column;
  }

  .btn {
    width: 100%;
  }

  .logo {
    font-size: 1.25rem;
  }

  .logo-img {
    height: 34px;
  }

  .logo-text {
    font-size: 1.1rem;
  }
}

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

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

/* Lazy loading */
img[loading="lazy"] {
  opacity: 1;
  transition: opacity 0.3s ease;
}

/* Accessibility */
:focus-visible {
  outline: 2px solid var(--primary);
  outline-offset: 2px;
}

.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border-width: 0;
}

/* Patent Gallery */
.patent-gallery-section .section-header {
  margin-top: 4rem;
}

.patent-gallery-section .section-header:first-of-type {
  margin-top: 0;
}

.patent-gallery-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1.5rem;
  margin-bottom: 4rem;
}

.patent-gallery-item {
  position: relative;
  background: var(--bg-white);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-sm);
  aspect-ratio: 3 / 4;
  cursor: zoom-in;
  transition: var(--transition);
}

.patent-gallery-item:hover {
  box-shadow: var(--shadow-lg);
  border-color: var(--primary);
}

.patent-gallery-item img {
  width: 100%;
  height: 100%;
  object-fit: contain;
  background: var(--bg-light);
  display: block;
  transition: transform 0.4s ease;
}

.patent-gallery-item:hover img {
  transform: scale(1.08);
}

@media (max-width: 1024px) {
  .patent-gallery-grid {
    grid-template-columns: repeat(3, 1fr);
  }
}

@media (max-width: 768px) {
  .patent-gallery-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: 1.25rem;
  }
}

@media (max-width: 480px) {
  .patent-gallery-grid {
    grid-template-columns: 1fr;
  }
}