/* ===== CSS Variables ===== */
:root {
  --primary: #0a1628;
  --primary-light: #1a2a4a;
  --accent: #2563eb;
  --accent-light: #3b82f6;
  --accent-glow: rgba(37, 99, 235, 0.3);
  --text: #e2e8f0;
  --text-muted: #94a3b8;
  --text-dark: #1e293b;
  --bg-card: rgba(255, 255, 255, 0.03);
  --bg-card-hover: rgba(255, 255, 255, 0.06);
  --border: rgba(255, 255, 255, 0.08);
  --white: #ffffff;
  --gradient-hero: linear-gradient(135deg, #0a1628 0%, #1a2a4a 50%, #0f2040 100%);
  --gradient-accent: linear-gradient(135deg, #2563eb 0%, #1d4ed8 100%);
  --gradient-card: linear-gradient(145deg, rgba(255,255,255,0.05) 0%, rgba(255,255,255,0.02) 100%);
  --shadow: 0 4px 24px rgba(0, 0, 0, 0.3);
  --shadow-lg: 0 8px 40px rgba(0, 0, 0, 0.4);
  --radius: 12px;
  --radius-lg: 20px;
  --transition: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  --font-cn: 'PingFang SC', 'Microsoft YaHei', sans-serif;
  --font-en: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
}

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

html {
  scroll-behavior: smooth;
  font-size: 16px;
}

body {
  font-family: var(--font-cn);
  background: var(--primary);
  color: var(--text);
  line-height: 1.7;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
}

body[data-lang="en"] {
  font-family: var(--font-en);
}

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

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

ul {
  list-style: none;
}

.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
}

/* ===== Scroll Animations ===== */
.fade-in {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}

.fade-in.visible {
  opacity: 1;
  transform: translateY(0);
}

.fade-in-left {
  opacity: 0;
  transform: translateX(-40px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}

.fade-in-left.visible {
  opacity: 1;
  transform: translateX(0);
}

.fade-in-right {
  opacity: 0;
  transform: translateX(40px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}

.fade-in-right.visible {
  opacity: 1;
  transform: translateX(0);
}

.scale-in {
  opacity: 0;
  transform: scale(0.9);
  transition: opacity 0.5s ease, transform 0.5s ease;
}

.scale-in.visible {
  opacity: 1;
  transform: scale(1);
}

/* ===== Header / Navigation ===== */
.header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  padding: 16px 0;
  transition: background var(--transition), padding var(--transition), box-shadow var(--transition);
}

.header.scrolled {
  background: rgba(10, 22, 40, 0.95);
  backdrop-filter: blur(12px);
  padding: 10px 0;
  box-shadow: 0 2px 20px rgba(0, 0, 0, 0.3);
}

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

.logo {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--white);
}

.logo svg {
  width: 36px;
  height: 36px;
}

.logo-img {
  width: 36px;
  height: 36px;
  border-radius: 6px;
  object-fit: contain;
}

.nav {
  display: flex;
  align-items: center;
  gap: 32px;
}

.nav-links {
  display: flex;
  gap: 28px;
}

.nav-links a {
  font-size: 0.9rem;
  font-weight: 500;
  color: var(--text-muted);
  position: relative;
  padding: 4px 0;
}

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

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

.nav-links a:hover::after {
  width: 100%;
}

.lang-toggle {
  display: flex;
  align-items: center;
  gap: 6px;
  background: rgba(255, 255, 255, 0.08);
  border: 1px solid var(--border);
  border-radius: 20px;
  padding: 6px 14px;
  cursor: pointer;
  font-size: 0.8rem;
  font-weight: 500;
  color: var(--text-muted);
  transition: all var(--transition);
}

.lang-toggle:hover {
  background: rgba(255, 255, 255, 0.12);
  color: var(--white);
}

.lang-toggle svg {
  width: 16px;
  height: 16px;
}

/* Mobile menu */
.mobile-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  cursor: pointer;
  padding: 4px;
}

.mobile-toggle span {
  width: 24px;
  height: 2px;
  background: var(--white);
  border-radius: 2px;
  transition: all var(--transition);
}

/* ===== Hero Section ===== */
.hero {
  min-height: 100vh;
  display: flex;
  align-items: center;
  background: var(--gradient-hero);
  position: relative;
  overflow: hidden;
}

.hero::before {
  content: '';
  position: absolute;
  top: -50%;
  right: -20%;
  width: 800px;
  height: 800px;
  background: radial-gradient(circle, var(--accent-glow) 0%, transparent 70%);
  animation: pulse 8s ease-in-out infinite;
}

.hero::after {
  content: '';
  position: absolute;
  bottom: -30%;
  left: -10%;
  width: 600px;
  height: 600px;
  background: radial-gradient(circle, rgba(37, 99, 235, 0.15) 0%, transparent 70%);
  animation: pulse 10s ease-in-out infinite reverse;
}

@keyframes pulse {
  0%, 100% { transform: scale(1); opacity: 0.5; }
  50% { transform: scale(1.1); opacity: 0.8; }
}

.hero-content {
  position: relative;
  z-index: 2;
  max-width: 700px;
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: rgba(37, 99, 235, 0.15);
  border: 1px solid rgba(37, 99, 235, 0.3);
  border-radius: 20px;
  padding: 6px 16px;
  font-size: 0.8rem;
  color: var(--accent-light);
  margin-bottom: 24px;
}

.hero h1 {
  font-size: clamp(2.2rem, 5vw, 3.5rem);
  font-weight: 800;
  line-height: 1.2;
  margin-bottom: 20px;
  background: linear-gradient(135deg, var(--white) 0%, #93c5fd 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero p {
  font-size: 1.15rem;
  color: var(--text-muted);
  margin-bottom: 36px;
  max-width: 560px;
}

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

.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 14px 28px;
  border-radius: 8px;
  font-size: 0.95rem;
  font-weight: 600;
  cursor: pointer;
  border: none;
  transition: all var(--transition);
}

.btn-primary {
  background: var(--gradient-accent);
  color: var(--white);
  box-shadow: 0 4px 16px rgba(37, 99, 235, 0.4);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 24px rgba(37, 99, 235, 0.5);
}

.btn-outline {
  background: transparent;
  color: var(--white);
  border: 1px solid var(--border);
}

.btn-outline:hover {
  background: rgba(255, 255, 255, 0.05);
  border-color: var(--accent);
}

/* ===== Section Common ===== */
.section {
  padding: 100px 0;
  position: relative;
}

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

.section-header h2 { font-size: clamp(1.8rem, 3vw, 2.5rem);
  font-weight: 700;
  margin-bottom: 16px;
  color: var(--white);
}

.section-header p {
  font-size: 1.05rem;
  color: var(--text-muted);
  max-width: 600px;
  margin: 0 auto;
}

.section-light {
  background: linear-gradient(180deg, #f8fafc 0%, #e2e8f0 100%);
  color: var(--text-dark);
}

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

.section-light .section-header p {
  color: #64748b;
}

/* ===== About Section ===== */
.about-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 60px;
  align-items: center;
}

.about-text h3 {
  font-size: 1.5rem;
  margin-bottom: 16px;
  color: var(--white);
}

.about-text p {
  color: var(--text-muted);
  margin-bottom: 16px;
  line-height: 1.8;
}

.about-stats {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 24px;
}

.stat-card {
  background: var(--gradient-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 28px;
  text-align: center;
  transition: all var(--transition);
}

.stat-card:hover {
  border-color: var(--accent);
  transform: translateY(-4px);
  box-shadow: 0 8px 32px rgba(37, 99, 235, 0.15);
}

.stat-number {
  font-size: 2.2rem;
  font-weight: 800;
  color: var(--accent-light);
  margin-bottom: 4px;
}

.stat-label {
  font-size: 0.85rem;
  color: var(--text-muted);
}

/* ===== Hero Stats ===== */
.hero-stats {
  display: flex;
  gap: 40px;
  margin-top: 60px;
  position: relative;
  z-index: 2;
}

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

.hero-stat-number {
  display: block;
  font-size: 2rem;
  font-weight: 800;
  color: var(--accent-light);
}

.hero-stat-label {
  font-size: 0.8rem;
  color: var(--text-muted);
  margin-top: 4px;
}

/* ===== Product Layout ===== */
.product-layout {
  display: grid;
  grid-template-columns: 1fr 1.2fr;
  gap: 40px;
  align-items: center;
}

.product-layout.reverse {
  grid-template-columns: 1.2fr 1fr;
}

.product-layout.reverse .product-image {
  order: 2;
}

.product-layout.reverse .product-info {
  order: 1;
}

.product-image {
  border-radius: var(--radius);
  overflow: hidden;
  background: rgba(255, 255, 255, 0.02);
  border: 1px solid var(--border);
  aspect-ratio: 4/3;
}

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

/* Product Tracking Demo */
.product-tracking-demo {
  margin-top: 32px;
  padding-top: 24px;
  border-top: 1px solid var(--border);
}

.product-tracking-demo h4 {
  font-size: 1rem;
  font-weight: 600;
  color: var(--white);
  margin-bottom: 16px;
}

.tracking-images {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 12px;
}

.tracking-images img {
  width: 100%;
  height: auto;
  border-radius: 8px;
  border: 1px solid var(--border);
  cursor: pointer;
  transition: transform 0.2s, box-shadow 0.2s;
}

.tracking-images img:hover {
  transform: scale(1.02);
  box-shadow: 0 4px 20px rgba(37, 99, 235, 0.3);
}

/* Lightbox */
.lightbox {
  display: none;
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: rgba(0, 0, 0, 0.9);
  z-index: 9999;
  justify-content: center;
  align-items: center;
  cursor: zoom-out;
}

.lightbox.active {
  display: flex;
}

.lightbox img {
  max-width: 90%;
  max-height: 90%;
  border-radius: 8px;
  box-shadow: 0 0 40px rgba(0, 0, 0, 0.5);
}

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

/* PTL Carousel */
.product-image-carousel {
  position: relative;
  aspect-ratio: 4/3;
  display: flex;
  align-items: center;
  justify-content: center;
}

.product-image-carousel .carousel-img {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  opacity: 0;
  transition: opacity 0.6s ease;
}

.product-image-carousel .carousel-img.active {
  opacity: 1;
}

.carousel-dots {
  position: absolute;
  bottom: 12px;
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  gap: 8px;
  z-index: 2;
}

.carousel-dots .dot {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.3);
  cursor: pointer;
  transition: background 0.3s;
}

.carousel-dots .dot.active {
  background: var(--accent-light);
}

/* ===== About Content ===== */
.about-content {
  max-width: 800px;
  margin: 0 auto;
  text-align: center;
}

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

/* ===== Section Dark ===== */
.section-dark {
  background: linear-gradient(180deg, #0a1628 0%, #0f1d35 100%);
}

/* ===== Products Section ===== */
.product-card {
  background: var(--gradient-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 48px;
  margin-bottom: 40px;
  transition: all var(--transition);
}

.product-card:hover {
  border-color: rgba(37, 99, 235, 0.3);
  box-shadow: var(--shadow-lg);
}

.product-header {
  display: flex;
  align-items: flex-start;
  gap: 24px;
  margin-bottom: 32px;
}

.product-icon {
  width: 64px;
  height: 64px;
  background: var(--gradient-accent);
  border-radius: var(--radius);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

.product-icon svg {
  width: 32px;
  height: 32px;
  color: var(--white);
}

.product-header h3 {
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--white);
  margin-bottom: 8px;
}

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

.product-features {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: 20px;
  margin-bottom: 32px;
}

.feature-item {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  padding: 16px;
  background: rgba(255, 255, 255, 0.02);
  border-radius: 8px;
  border: 1px solid transparent;
  transition: all var(--transition);
}

.feature-item:hover {
  border-color: var(--border);
  background: rgba(255, 255, 255, 0.04);
}

.feature-item svg {
  width: 20px;
  height: 20px;
  color: var(--accent-light);
  flex-shrink: 0;
  margin-top: 2px;
}

.feature-item span {
  font-size: 0.9rem;
  color: var(--text-muted);
}

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

.spec-tag {
  background: rgba(37, 99, 235, 0.1);
  border: 1px solid rgba(37, 99, 235, 0.2);
  border-radius: 6px;
  padding: 6px 14px;
  font-size: 0.8rem;
  color: var(--accent-light);
}

/* ===== Advantages Section ===== */
.advantages-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 24px;
}

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

.advantage-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: var(--gradient-accent);
  transform: scaleX(0);
  transition: transform var(--transition);
}

.advantage-card:hover::before {
  transform: scaleX(1);
}

.advantage-card:hover {
  transform: translateY(-4px);
  border-color: rgba(37, 99, 235, 0.3);
  box-shadow: 0 12px 40px rgba(0, 0, 0, 0.3);
}

.advantage-card svg {
  width: 40px;
  height: 40px;
  color: var(--accent-light);
  margin-bottom: 20px;
}

.advantage-card h4 {
  font-size: 1.1rem;
  font-weight: 600;
  color: var(--white);
  margin-bottom: 12px;
}

.advantage-card p {
  font-size: 0.9rem;
  color: var(--text-muted);
  line-height: 1.7;
}

/* ===== Cases Section ===== */
.cases-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 24px;
}

.case-card {
  background: var(--white);
  border-radius: var(--radius);
  padding: 36px;
  transition: all var(--transition);
  box-shadow: 0 2px 12px rgba(0, 0, 0, 0.06);
}

.case-card:hover {
  transform: translateY(-4px);
  box-shadow: 0 12px 40px rgba(0, 0, 0, 0.12);
}

.case-industry {
  display: inline-block;
  background: rgba(37, 99, 235, 0.1);
  color: var(--accent);
  font-size: 0.75rem;
  font-weight: 600;
  padding: 4px 12px;
  border-radius: 12px;
  margin-bottom: 16px;
}

.case-card h4 {
  font-size: 1.1rem;
  font-weight: 600;
  color: var(--text-dark);
  margin-bottom: 12px;
}

.case-card p {
  font-size: 0.9rem;
  color: #64748b;
  margin-bottom: 20px;
  line-height: 1.7;
}

.case-metrics {
  display: flex;
  gap: 20px;
  padding-top: 16px;
  border-top: 1px solid #e2e8f0;
}

.case-metric {
  text-align: center;
}

.case-metric strong {
  display: block;
  font-size: 1.3rem;
  font-weight: 700;
  color: var(--accent);
}

.case-metric span {
  font-size: 0.75rem;
  color: #94a3b8;
}

/* ===== Partners Section ===== */
.partners-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
  gap: 24px;
  align-items: center;
}

.partner-logo {
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 32px 24px;
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 100px;
  transition: all var(--transition);
  color: var(--text-muted);
  font-size: 0.85rem;
  font-weight: 500;
  text-align: center;
}

.partner-logo:hover {
  border-color: var(--accent);
  background: rgba(37, 99, 235, 0.05);
}

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

.contact-info h3 {
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--white);
  margin-bottom: 24px;
}

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

.contact-item svg {
  width: 24px;
  height: 24px;
  color: var(--accent-light);
  flex-shrink: 0;
  margin-top: 2px;
}

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

.contact-item strong {
  display: block;
  color: var(--white);
  margin-bottom: 4px;
}

.contact-form {
  background: var(--gradient-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 40px;
}

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

.form-group label {
  display: block;
  font-size: 0.85rem;
  font-weight: 500;
  color: var(--text-muted);
  margin-bottom: 8px;
}

.form-group input,
.form-group textarea {
  width: 100%;
  padding: 12px 16px;
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid var(--border);
  border-radius: 8px;
  color: var(--white);
  font-size: 0.9rem;
  font-family: inherit;
  transition: all var(--transition);
}

.form-group input:focus,
.form-group textarea:focus {
  outline: none;
  border-color: var(--accent);
  box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.15);
}

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

/* ===== Section Divider ===== */
.section-divider {
  width: 60px;
  height: 2px;
  background: var(--gradient-accent);
  margin: 60px auto;
  border-radius: 2px;
}

/* ===== About & Contact Grid ===== */
.about-contact-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 60px;
  align-items: start;
}

.about-side h3,
.contact-side h3 {
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--white);
  margin-bottom: 24px;
}

.about-side p {
  color: var(--text-muted);
  line-height: 1.8;
  margin-bottom: 16px;
}

.contact-side .contact-info {
  display: flex;
  flex-direction: column;
  gap: 24px;
  margin-bottom: 32px;
}

.contact-side .contact-item {
  display: flex;
  align-items: center;
  gap: 16px;
}

.contact-side .contact-item svg {
  width: 24px;
  height: 24px;
  flex-shrink: 0;
  color: var(--accent-light);
}

.contact-side .contact-item strong {
  display: block;
  color: var(--white);
  margin-bottom: 4px;
}

.contact-side .contact-item p {
  color: var(--text-muted);
  margin: 0;
}

.contact-cta {
  text-align: left;
}

.contact-cta p {
  color: var(--text-muted);
  margin-bottom: 24px;
  font-size: 1rem;
}

@media (max-width: 768px) {
  .about-contact-grid {
    grid-template-columns: 1fr;
    gap: 40px;
  }
}

/* ===== Footer ===== */
.footer {
  background: #050d1a;
  padding: 60px 0 30px;
  border-top: 1px solid var(--border);
}

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

.footer-brand p {
  color: var(--text-muted);
  font-size: 0.9rem;
  margin-top: 16px;
  line-height: 1.7;
}

.footer-col h4 {
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--white);
  margin-bottom: 16px;
}

.footer-col a {
  display: block;
  font-size: 0.85rem;
  color: var(--text-muted);
  margin-bottom: 10px;
  transition: color var(--transition);
}

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

.footer-bottom {
  padding-top: 30px;
  border-top: 1px solid var(--border);
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 0.8rem;
  color: var(--text-muted);
}

/* ===== Responsive ===== */
@media (max-width: 1024px) {
  .about-grid {
    grid-template-columns: 1fr;
    gap: 40px;
  }

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

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

@media (max-width: 768px) {
  .nav-links {
    display: none;
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    background: rgba(10, 22, 40, 0.98);
    backdrop-filter: blur(12px);
    flex-direction: column;
    padding: 24px;
    gap: 16px;
    border-bottom: 1px solid var(--border);
  }

  .nav-links.active {
    display: flex;
  }

  .mobile-toggle {
    display: flex;
  }

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

  .hero p {
    font-size: 1rem;
  }

  .product-layout {
    grid-template-columns: 1fr;
  }

  .product-layout.reverse {
    grid-template-columns: 1fr;
  }

  .product-layout.reverse .product-image {
    order: 0;
  }

  .product-layout.reverse .product-info {
    order: 0;
  }

  .product-image {
    aspect-ratio: 16/9;
  }

  .product-image-k1 {
    aspect-ratio: 3/4;
  }

  .product-image-carousel {
    aspect-ratio: 16/9;
  }

  .hero-stats {
    flex-wrap: wrap;
    gap: 20px;
  }

  .hero-stat {
    flex: 1 1 40%;
  }

  .product-card {
    padding: 28px;
  }

  .product-header {
    flex-direction: column;
  }

  .product-features {
    grid-template-columns: 1fr;
  }

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

  .footer-grid {
    grid-template-columns: 1fr;
    gap: 30px;
  }

  .footer-bottom {
    flex-direction: column;
    gap: 12px;
    text-align: center;
  }

  .section {
    padding: 60px 0;
  }

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

  .about-contact-grid {
    grid-template-columns: 1fr;
    gap: 40px;
  }
}

@media (max-width: 480px) {
  .hero-buttons {
    flex-direction: column;
  }

  .btn {
    justify-content: center;
  }

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

  .case-metrics {
    flex-direction: column;
    gap: 12px;
  }

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