/* ===== CSS Variables ===== */
:root {
  --primary: #268aff;
  --primary-dark: #1a6fd4;
  --primary-light: #e8f2ff;
  --text: #1a1a2e;
  --text-secondary: #5a5a72;
  --text-muted: #8a8a9a;
  --bg: #ffffff;
  --bg-alt: #f7f9fc;
  --border: #e8ecf2;
  --shadow: 0 4px 24px rgba(38, 138, 255, 0.08);
  --shadow-lg: 0 12px 48px rgba(38, 138, 255, 0.12);
  --radius: 12px;
  --radius-lg: 20px;
  --header-height: 72px;
  --transition: 0.3s ease;
  --font: 'Noto Sans SC', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
}

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

html {
  scroll-behavior: smooth;
  scroll-padding-top: var(--header-height);
}

body {
  font-family: var(--font);
  color: var(--text);
  background: var(--bg);
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
}

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

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

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

ul {
  list-style: none;
}

.container {
  width: 100%;
  max-width: 1140px;
  margin: 0 auto;
  padding: 0 24px;
}

/* ===== Header ===== */
.header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: var(--header-height);
  background: rgba(255, 255, 255, 0.92);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid transparent;
  z-index: 1000;
  transition: border-color var(--transition), box-shadow var(--transition);
}

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

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 100%;
}

.logo {
  display: flex;
  align-items: center;
  gap: 10px;
  color: var(--text);
  font-weight: 600;
  font-size: 1.15rem;
}

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

.logo img {
  border-radius: 8px;
}

.nav {
  display: flex;
  gap: 8px;
}

.nav-link {
  padding: 8px 16px;
  color: var(--text-secondary);
  font-size: 0.95rem;
  font-weight: 500;
  border-radius: 8px;
  transition: color var(--transition), background var(--transition);
}

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

.nav-toggle {
  display: none;
  background: none;
  border: none;
  font-size: 1.4rem;
  color: var(--text);
  cursor: pointer;
  padding: 8px;
}

/* ===== Buttons ===== */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 12px 28px;
  font-size: 0.95rem;
  font-weight: 500;
  border-radius: 10px;
  border: 2px solid transparent;
  cursor: pointer;
  transition: all var(--transition);
  font-family: var(--font);
}

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

.btn-primary:hover {
  background: var(--primary-dark);
  border-color: var(--primary-dark);
  color: #fff;
  transform: translateY(-1px);
  box-shadow: 0 6px 20px rgba(38, 138, 255, 0.3);
}

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

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

/* ===== Hero ===== */
.hero {
  position: relative;
  padding: calc(var(--header-height) + 80px) 0 100px;
  overflow: hidden;
}

.hero-bg {
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, var(--primary-light) 0%, #fff 50%, #f0f6ff 100%);
  z-index: -1;
}

.hero-bg::after {
  content: '';
  position: absolute;
  top: -50%;
  right: -20%;
  width: 600px;
  height: 600px;
  background: radial-gradient(circle, rgba(38, 138, 255, 0.08) 0%, transparent 70%);
  border-radius: 50%;
}

.hero-content {
  display: grid;
  gap: 60px;
}

.hero-tag {
  display: inline-block;
  padding: 6px 16px;
  background: rgba(38, 138, 255, 0.1);
  color: var(--primary);
  font-size: 0.85rem;
  font-weight: 500;
  border-radius: 20px;
  margin-bottom: 20px;
}

.hero-text h1 {
  font-size: clamp(2rem, 5vw, 3rem);
  font-weight: 700;
  line-height: 1.3;
  margin-bottom: 20px;
  color: var(--text);
}

.hero-desc {
  font-size: 1.1rem;
  color: var(--text-secondary);
  max-width: 560px;
  margin-bottom: 32px;
}

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

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

.feature-card {
  background: var(--bg);
  padding: 32px 24px;
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow);
  border: 1px solid var(--border);
  transition: transform var(--transition), box-shadow var(--transition);
}

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

.feature-card i {
  font-size: 1.8rem;
  color: var(--primary);
  margin-bottom: 16px;
}

.feature-card h3 {
  font-size: 1.1rem;
  margin-bottom: 8px;
}

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

/* ===== Sections ===== */
.section {
  padding: 100px 0;
}

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

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

.section-label {
  display: inline-block;
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--primary);
  text-transform: uppercase;
  letter-spacing: 2px;
  margin-bottom: 12px;
}

.section-header h2 {
  font-size: clamp(1.6rem, 3vw, 2.2rem);
  font-weight: 700;
  margin-bottom: 16px;
}

.section-desc {
  color: var(--text-secondary);
  max-width: 600px;
  margin: 0 auto;
  font-size: 0.95rem;
}

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

.about-content p {
  color: var(--text-secondary);
  margin-bottom: 20px;
  font-size: 1rem;
}

.about-stats {
  margin-top: 32px;
  display: flex;
  flex-direction: column;
  gap: 20px;
}

.about-stats li {
  display: flex;
  align-items: flex-start;
  gap: 16px;
}

.about-stats i {
  font-size: 1.3rem;
  color: var(--primary);
  margin-top: 4px;
  width: 24px;
  text-align: center;
}

.about-stats strong {
  display: block;
  font-size: 0.95rem;
  margin-bottom: 2px;
}

.about-stats span {
  font-size: 0.9rem;
  color: var(--text-secondary);
}

.about-icon-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 20px;
}

.icon-box {
  aspect-ratio: 1;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--bg);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow);
  border: 1px solid var(--border);
  transition: transform var(--transition);
}

.icon-box:hover {
  transform: scale(1.05);
}

.icon-box i {
  font-size: 2.5rem;
  color: var(--primary);
}

/* ===== Services ===== */
.services-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.service-card {
  background: var(--bg);
  padding: 36px 28px;
  border-radius: var(--radius-lg);
  border: 1px solid var(--border);
  transition: transform var(--transition), box-shadow var(--transition);
}

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

.service-icon {
  width: 56px;
  height: 56px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--primary-light);
  border-radius: 14px;
  margin-bottom: 20px;
}

.service-icon i {
  font-size: 1.4rem;
  color: var(--primary);
}

.service-card h3 {
  font-size: 1.1rem;
  margin-bottom: 10px;
}

.service-card p {
  font-size: 0.9rem;
  color: var(--text-secondary);
  line-height: 1.6;
}

/* ===== Products ===== */
.products-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
}

.product-card {
  background: var(--bg);
  padding: 28px 20px;
  border-radius: var(--radius);
  border: 1px solid var(--border);
  text-align: center;
  transition: border-color var(--transition), box-shadow var(--transition);
}

.product-card:hover {
  border-color: var(--primary);
  box-shadow: var(--shadow);
}

.product-card i {
  font-size: 1.6rem;
  color: var(--primary);
  margin-bottom: 14px;
}

.product-card h3 {
  font-size: 1rem;
  margin-bottom: 8px;
}

.product-card p {
  font-size: 0.85rem;
  color: var(--text-muted);
}

.products-note {
  margin-top: 40px;
  padding: 16px 20px;
  background: var(--primary-light);
  border-radius: var(--radius);
  font-size: 0.85rem;
  color: var(--text-secondary);
  display: flex;
  align-items: flex-start;
  gap: 10px;
  line-height: 1.6;
}

.products-note i {
  color: var(--primary);
  margin-top: 3px;
  flex-shrink: 0;
}

/* ===== Platforms ===== */
.platforms-grid {
  display: flex;
  justify-content: center;
  gap: 48px;
  flex-wrap: wrap;
}

.platform-item {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 12px;
}

.platform-item i {
  font-size: 2.5rem;
  color: var(--primary);
}

.platform-item span {
  font-size: 0.9rem;
  color: var(--text-secondary);
  font-weight: 500;
}

.platforms-note {
  text-align: center;
  margin-top: 32px;
  font-size: 0.85rem;
  color: var(--text-muted);
}

/* ===== Contact ===== */
.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 40px;
}

.contact-info {
  display: flex;
  flex-direction: column;
  gap: 28px;
}

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

.contact-item > i {
  font-size: 1.2rem;
  color: var(--primary);
  margin-top: 4px;
  width: 24px;
  text-align: center;
}

.contact-item strong {
  display: block;
  font-size: 0.9rem;
  margin-bottom: 4px;
}

.contact-item a,
.contact-item span {
  display: block;
  font-size: 0.95rem;
  color: var(--text-secondary);
}

.contact-hours,
.contact-transit {
  font-size: 0.85rem !important;
  color: var(--text-muted) !important;
  margin-top: 4px;
}

.contact-cta {
  background: linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 100%);
  color: #fff;
  padding: 48px 36px;
  border-radius: var(--radius-lg);
  text-align: center;
}

.contact-cta > i {
  font-size: 2.5rem;
  margin-bottom: 20px;
  opacity: 0.9;
}

.contact-cta h3 {
  font-size: 1.3rem;
  margin-bottom: 12px;
}

.contact-cta p {
  font-size: 0.9rem;
  opacity: 0.9;
  margin-bottom: 28px;
  line-height: 1.7;
}

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

.contact-cta .btn-primary:hover {
  background: var(--primary-light);
  color: var(--primary-dark);
  border-color: var(--primary-light);
}

/* ===== Footer ===== */
.footer {
  background: var(--text);
  color: rgba(255, 255, 255, 0.7);
  padding: 48px 0 32px;
}

.footer-top {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding-bottom: 32px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.1);
  margin-bottom: 24px;
}

.footer-brand {
  display: flex;
  align-items: center;
  gap: 10px;
  color: #fff;
  font-weight: 600;
  font-size: 1.1rem;
}

.footer-brand img {
  border-radius: 6px;
}

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

.footer-nav a {
  color: rgba(255, 255, 255, 0.7);
  font-size: 0.9rem;
  transition: color var(--transition);
}

.footer-nav a:hover {
  color: #fff;
}

.footer-legal {
  text-align: center;
}

.footer-legal p {
  font-size: 0.85rem;
  margin-bottom: 8px;
}

.footer-legal a {
  color: rgba(255, 255, 255, 0.7);
}

.footer-legal a:hover {
  color: #fff;
}

.disclaimer {
  margin-top: 16px;
  padding-top: 16px;
  border-top: 1px solid rgba(255, 255, 255, 0.08);
  font-size: 0.8rem !important;
  color: rgba(255, 255, 255, 0.45) !important;
  line-height: 1.7;
  max-width: 720px;
  margin-left: auto;
  margin-right: auto;
}

/* ===== Responsive ===== */
@media (max-width: 992px) {
  .hero-features {
    grid-template-columns: 1fr;
  }

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

  .about-visual {
    order: -1;
  }

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

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

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

@media (max-width: 768px) {
  .nav {
    position: fixed;
    top: var(--header-height);
    left: 0;
    right: 0;
    background: var(--bg);
    flex-direction: column;
    padding: 16px;
    border-bottom: 1px solid var(--border);
    box-shadow: var(--shadow);
    transform: translateY(-120%);
    opacity: 0;
    pointer-events: none;
    transition: transform var(--transition), opacity var(--transition);
  }

  .nav.open {
    transform: translateY(0);
    opacity: 1;
    pointer-events: auto;
  }

  .nav-toggle {
    display: block;
  }

  .section {
    padding: 72px 0;
  }

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

  .footer-top {
    flex-direction: column;
    gap: 20px;
    text-align: center;
  }

  .footer-nav {
    flex-wrap: wrap;
    justify-content: center;
  }
}

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

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

  .hero-actions .btn {
    width: 100%;
    justify-content: center;
  }

  .platforms-grid {
    gap: 32px;
  }
}