:root {
  --bg: #000;
  --fg: #f5f5f7;
  --muted: #86868b;
  --accent: #2997ff;
  --card-bg: #1d1d1f;
  --section-bg: #000;
}

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

body {
  background: var(--bg);
  color: var(--fg);
  font-family: -apple-system, BlinkMacSystemFont, "Helvetica Neue", Arial, "PingFang SC", sans-serif;
  line-height: 1.47;
  -webkit-font-smoothing: antialiased;
}

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

/* Nav */
.nav {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(0, 0, 0, 0.8);
  backdrop-filter: saturate(180%) blur(20px);
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
}
.nav-inner {
  max-width: 1024px;
  margin: 0 auto;
  height: 44px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 22px;
}
.nav-logo {
  font-size: 19px;
  font-weight: 600;
  letter-spacing: 0.5px;
}
.nav-links {
  display: flex;
  gap: 28px;
  font-size: 12px;
  color: var(--muted);
}
.nav-links a:hover { color: var(--fg); }

/* Hero */
.hero {
  text-align: center;
  padding: 90px 20px 70px;
  background: linear-gradient(180deg, #000 0%, #0a0a0c 100%);
}
.hero h1 {
  font-size: 56px;
  font-weight: 600;
  letter-spacing: -0.02em;
}
.hero-sub {
  font-size: 28px;
  color: var(--muted);
  margin-top: 8px;
}
.hero-desc {
  font-size: 17px;
  color: var(--muted);
  margin-top: 20px;
  max-width: 520px;
  margin-left: auto;
  margin-right: auto;
}
.hero-actions {
  margin-top: 28px;
  display: flex;
  gap: 16px;
  justify-content: center;
}
.btn {
  display: inline-block;
  padding: 10px 22px;
  border-radius: 980px;
  font-size: 15px;
  transition: opacity 0.2s;
}
.btn:hover { opacity: 0.8; }
.btn-primary { background: var(--accent); color: #fff; }
.btn-secondary { background: transparent; color: var(--accent); border: 1px solid var(--accent); }

.hero-visual {
  margin: 60px auto 0;
  max-width: 900px;
  height: 380px;
  border-radius: 24px;
  background: radial-gradient(circle at 30% 20%, #3a3a3c 0%, #1c1c1e 55%, #000 100%);
  box-shadow: 0 40px 80px -20px rgba(0, 0, 0, 0.6);
}

/* Features */
.features {
  max-width: 1024px;
  margin: 0 auto;
  padding: 80px 20px;
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}
.feature-card {
  background: var(--card-bg);
  border-radius: 18px;
  padding: 32px 24px;
  text-align: left;
}
.feature-card h3 {
  font-size: 20px;
  margin: 18px 0 10px;
}
.feature-card p {
  font-size: 14px;
  color: var(--muted);
}
.icon {
  width: 44px;
  height: 44px;
  border-radius: 12px;
}
.icon-chip { background: linear-gradient(135deg, #2997ff, #6dd5fa); }
.icon-shield { background: linear-gradient(135deg, #34c759, #30d158); }
.icon-leaf { background: linear-gradient(135deg, #ff9f0a, #ffd60a); }

/* Products */
.products {
  max-width: 1024px;
  margin: 0 auto;
  padding: 60px 20px 90px;
  text-align: center;
}
.products h2 {
  font-size: 40px;
  font-weight: 600;
  margin-bottom: 40px;
}
.product-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
}
.product-card {
  border-radius: 20px;
  padding: 40px 24px;
  text-align: left;
  min-height: 220px;
  display: flex;
  flex-direction: column;
  justify-content: flex-end;
}
.product-card h3 { font-size: 22px; margin-bottom: 8px; }
.product-card p { font-size: 14px; color: rgba(245,245,247,0.85); margin-bottom: 14px; }
.price { font-size: 13px; color: rgba(245,245,247,0.7); }
.product-a { background: linear-gradient(160deg, #2c2c2e, #1c1c1e); }
.product-b { background: linear-gradient(160deg, #3a2e17, #1c1c1e); }
.product-c { background: linear-gradient(160deg, #17233a, #1c1c1e); }

/* Gallery */
.gallery {
  max-width: 1024px;
  margin: 0 auto;
  padding: 40px 20px 90px;
  text-align: center;
}
.gallery h2 {
  font-size: 32px;
  font-weight: 600;
  margin-bottom: 32px;
}
.gallery-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 16px;
}
.gallery-item {
  height: 160px;
  border-radius: 16px;
}
.g1 { background: linear-gradient(135deg, #ff375f, #ff9f0a); }
.g2 { background: linear-gradient(135deg, #bf5af2, #5e5ce6); }
.g3 { background: linear-gradient(135deg, #64d2ff, #2997ff); }
.g4 { background: linear-gradient(135deg, #30d158, #34c759); }

/* CTA band */
.cta-band {
  text-align: center;
  padding: 90px 20px;
  background: #0a0a0c;
}
.cta-band h2 { font-size: 36px; margin-bottom: 12px; }
.cta-band p { color: var(--muted); margin-bottom: 26px; }

/* Footer */
.footer {
  border-top: 1px solid rgba(255,255,255,0.08);
  padding: 30px 20px;
}
.footer-inner {
  max-width: 1024px;
  margin: 0 auto;
  font-size: 12px;
  color: var(--muted);
}
.footer-inner p { margin-bottom: 8px; }

@media (max-width: 734px) {
  .nav-links { display: none; }
  .hero h1 { font-size: 40px; }
  .hero-sub { font-size: 21px; }
  .features, .product-grid { grid-template-columns: 1fr; }
  .gallery-grid { grid-template-columns: repeat(2, 1fr); }
}