:root {
  --bg: #04060a;
  --bg-soft: #0c111b;
  --bg-card: #111a29;
  --bg-highlight: #1f2c44;
  --primary: #61f2d1;
  --accent: #6b8bff;
  --text: #f5f7fa;
  --text-muted: #9db1d4;
  --border: rgba(255, 255, 255, 0.08);
  --shadow: 0 25px 80px rgba(9, 23, 55, 0.55);
  font-family: 'Inter', system-ui, -apple-system, BlinkMacSystemFont, 'PingFang SC',
    'Microsoft YaHei', sans-serif;
}

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

body {
  margin: 0;
  background: radial-gradient(circle at top, rgba(97, 242, 209, 0.1), transparent 45%),
    var(--bg);
  color: var(--text);
  font-family: inherit;
  line-height: 1.6;
  min-height: 100vh;
}

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

a {
  color: inherit;
  text-decoration: none;
}

.container {
  width: min(1200px, 90%);
  margin: 0 auto;
}

.site-header {
  position: sticky;
  top: 0;
  backdrop-filter: blur(18px);
  background-color: rgba(4, 6, 10, 0.8);
  border-bottom: 1px solid var(--border);
  z-index: 10;
}

.header-content {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 1rem 0;
  gap: 1.5rem;
}

.logo {
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.logo-icon {
  width: 48px;
  height: 48px;
  border-radius: 14px;
  background: conic-gradient(from 120deg, var(--accent), var(--primary));
  display: grid;
  place-items: center;
  font-weight: 700;
  color: #020304;
}

.logo-text span {
  display: block;
  font-size: 0.75rem;
  color: var(--text-muted);
}

nav {
  display: flex;
  gap: 1rem;
}

nav a {
  font-size: 0.95rem;
  padding: 0.35rem 0.75rem;
  border-radius: 999px;
  color: var(--text-muted);
  transition: color 0.3s ease, background 0.3s ease;
}

nav a:hover {
  color: var(--text);
  background: rgba(255, 255, 255, 0.05);
}

.menu-toggle {
  display: none;
  flex-direction: column;
  gap: 0.25rem;
  background: transparent;
  border: none;
  padding: 0.35rem;
  cursor: pointer;
}

.menu-toggle span {
  width: 26px;
  height: 2px;
  background: var(--text);
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border-radius: 999px;
  padding: 0.65rem 1.5rem;
  font-weight: 600;
  border: none;
  cursor: pointer;
  transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.btn.primary {
  background: linear-gradient(120deg, var(--accent), var(--primary));
  color: #04111c;
  box-shadow: 0 15px 35px rgba(107, 139, 255, 0.35);
}

.btn.secondary {
  border: 1px solid rgba(255, 255, 255, 0.2);
  color: var(--text);
}

.btn.ghost {
  border: 1px solid var(--border);
  color: var(--text);
}

.btn.block {
  width: 100%;
}

.btn:hover {
  transform: translateY(-1px);
}

.hero {
  padding: 6rem 0 4rem;
}

.hero-layout {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
  gap: 3rem;
  align-items: center;
}

.hero-eyebrow {
  color: var(--text-muted);
  letter-spacing: 0.1em;
  font-size: 0.85rem;
  text-transform: uppercase;
}

.hero h1 {
  font-size: clamp(2.5rem, 5vw, 3.8rem);
  margin-bottom: 1rem;
}

.lead {
  color: var(--text-muted);
  font-size: 1.05rem;
}

.hero-actions {
  margin: 2rem 0 1rem;
  display: flex;
  gap: 1rem;
  flex-wrap: wrap;
}

.hero-stats {
  display: flex;
  gap: 2rem;
  margin-top: 1.5rem;
  flex-wrap: wrap;
}

.hero-stats strong {
  font-size: 1.8rem;
  display: block;
}

.hero-visual {
  position: relative;
  padding: 2rem;
}

.visual-card {
  background: var(--bg-card);
  padding: 2rem;
  border-radius: 24px;
  border: 1px solid var(--border);
  box-shadow: var(--shadow);
}

.visual-metrics {
  margin-top: 1.5rem;
  display: flex;
  gap: 1.5rem;
}

.visual-metrics span {
  color: var(--text-muted);
  font-size: 0.85rem;
}

.orb {
  position: absolute;
  width: 260px;
  height: 260px;
  border-radius: 50%;
  background: radial-gradient(circle at 30% 30%, var(--primary), rgba(4, 17, 28, 0));
  top: 60%;
  right: 0;
  filter: blur(20px);
  opacity: 0.5;
}

.section {
  padding: 4.5rem 0;
}

.section-head {
  margin-bottom: 2rem;
}

.section-head h2 {
  font-size: 2rem;
  margin-bottom: 0.5rem;
}

.section-head p {
  color: var(--text-muted);
  max-width: 640px;
}

.grid {
  display: grid;
  gap: 1.5rem;
}

.grid-3 {
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
}

.grid-4 {
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
}

.case-card,
.solution-card,
.software-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  padding: 1.75rem;
  border-radius: 20px;
  box-shadow: 0 10px 40px rgba(4, 6, 10, 0.4);
}

.case-card ul,
.hardware-card ul {
  padding-left: 1.2rem;
  color: var(--text-muted);
}

.case-card li + li,
.hardware-card li + li {
  margin-top: 0.35rem;
}

.badge {
  display: inline-flex;
  padding: 0.2rem 0.65rem;
  border-radius: 999px;
  font-size: 0.8rem;
  background: rgba(97, 242, 209, 0.1);
  color: var(--primary);
  margin-bottom: 0.5rem;
}

.solution-card .tags {
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem;
  margin-top: 1rem;
}

.solution-card .tags span {
  padding: 0.25rem 0.65rem;
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.04);
  font-size: 0.8rem;
  color: var(--text-muted);
}

.hardware-list {
  display: flex;
  flex-direction: column;
  gap: 1.25rem;
}

.hardware-card {
  display: flex;
  justify-content: space-between;
  gap: 1rem;
  padding: 1.75rem;
  border-radius: 18px;
  border: 1px solid var(--border);
  background: linear-gradient(120deg, rgba(107, 139, 255, 0.08), var(--bg-card));
}

.product-card {
  background: rgba(255, 255, 255, 0.03);
  border: 1px solid var(--border);
  padding: 1.5rem;
  border-radius: 16px;
  box-shadow: 0 10px 32px rgba(4, 6, 10, 0.35);
}

.product-card h3 {
  margin: 0 0 0.5rem;
}

.product-card p {
  color: var(--text-muted);
  margin: 0;
}

.hardware-block {
  margin-bottom: 2.5rem;
}

.hardware-block:last-of-type {
  margin-bottom: 0;
}

.hardware-block-head {
  margin-bottom: 1.5rem;
}

.hardware-block-head h3 {
  margin: 0 0 0.4rem;
}

.hardware-cards {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 1.25rem;
}

.software-card .meta {
  display: flex;
  gap: 0.5rem;
  margin-top: 1rem;
  color: var(--text-muted);
  font-size: 0.85rem;
}

.sensor-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 1rem;
}

.sensor-card {
  padding: 1.25rem;
  border-radius: 16px;
  border: 1px solid var(--border);
  background: rgba(97, 242, 209, 0.03);
  color: var(--text-muted);
}

.sensor-card h4 {
  margin-top: 0;
  color: var(--text);
}

.kit-list {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 1rem;
}

.kit-card {
  border: 1px solid var(--border);
  border-radius: 16px;
  padding: 1.25rem;
  background: rgba(255, 255, 255, 0.02);
}

.kit-card h4 {
  margin: 0 0 0.4rem;
}

.adv-grid {
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
}

.adv-card {
  border-radius: 18px;
  border: 1px solid var(--border);
  padding: 1.5rem;
  background: rgba(107, 139, 255, 0.08);
}

.audience-list {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 1rem;
}

.audience-list div {
  border: 1px solid var(--border);
  border-radius: 16px;
  padding: 1.25rem;
  background: rgba(255, 255, 255, 0.02);
}

.audience-list strong {
  display: block;
  margin-bottom: 0.35rem;
}

.media-placeholder {
  margin-top: 1rem;
  border: 1px dashed rgba(255, 255, 255, 0.35);
  border-radius: 14px;
  padding: 1rem;
  color: var(--text-muted);
  font-size: 0.9rem;
  text-align: center;
}

.docs-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 1.25rem;
}

.docs-grid article {
  border-radius: 18px;
  border: 1px solid var(--border);
  padding: 1.5rem;
  background: rgba(255, 255, 255, 0.02);
}

.docs-grid a {
  color: var(--primary);
  font-weight: 600;
}

.about-layout {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 2rem;
}

.values {
  margin-top: 1.5rem;
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(120px, 1fr));
  gap: 1rem;
}

.values strong {
  display: block;
  font-size: 1.5rem;
  color: var(--primary);
}

.about-card {
  border-radius: 20px;
  padding: 2rem;
  border: 1px solid var(--border);
  background: var(--bg-card);
  box-shadow: var(--shadow);
}

.site-footer {
  border-top: 1px solid var(--border);
  padding: 2rem 0;
  background: #05070e;
}

.footer-layout {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 1rem;
  flex-wrap: wrap;
}

.footer-links {
  display: flex;
  gap: 1rem;
  color: var(--text-muted);
}

.icp a {
  color: var(--text-muted);
  font-size: 0.9rem;
}

@media (max-width: 768px) {
  nav {
    position: absolute;
    top: 70px;
    left: 0;
    right: 0;
    background: rgba(4, 6, 10, 0.95);
    flex-direction: column;
    align-items: center;
    padding: 1rem 0;
    transform: translateY(-300%);
    transition: transform 0.3s ease;
  }

  nav.open {
    transform: translateY(0);
  }

  .menu-toggle {
    display: flex;
  }

  .header-content .btn {
    display: none;
  }

  .hardware-card {
    flex-direction: column;
  }

  .hardware-cards {
    grid-template-columns: 1fr;
  }
}