:root {
  --bg: #070b14;
  --bg2: #0d1524;
  --panel: rgba(18, 28, 46, 0.82);
  --line: rgba(94, 200, 255, 0.22);
  --text: #e8eef8;
  --muted: #8fa3bf;
  --cyan: #5ec8ff;
  --cyan2: #2aa8ef;
  --glow: rgba(94, 200, 255, 0.35);
  --radius: 18px;
  --font: "Noto Sans SC", "Segoe UI", sans-serif;
  --display: "Orbitron", "Noto Sans SC", sans-serif;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  font-family: var(--font);
  color: var(--text);
  background: var(--bg);
  line-height: 1.65;
  min-height: 100vh;
  overflow-x: hidden;
}

a { color: var(--cyan); text-decoration: none; }
a:hover { color: #9fdfff; }

.bg-grid {
  position: fixed; inset: 0; pointer-events: none; z-index: 0;
  background-image:
    linear-gradient(rgba(94, 200, 255, 0.05) 1px, transparent 1px),
    linear-gradient(90deg, rgba(94, 200, 255, 0.05) 1px, transparent 1px);
  background-size: 48px 48px;
  mask-image: radial-gradient(ellipse at center, #000 20%, transparent 75%);
}
.bg-glow {
  position: fixed; inset: -20% auto auto 40%; width: 60vw; height: 50vh; pointer-events: none; z-index: 0;
  background: radial-gradient(circle, rgba(42, 168, 239, 0.22), transparent 65%);
  filter: blur(12px);
}

.topbar, main, .site-footer { position: relative; z-index: 1; }

.topbar {
  display: flex; align-items: center; justify-content: space-between;
  max-width: 1120px; margin: 0 auto; padding: 18px 24px;
}
.brand {
  display: inline-flex; align-items: center; gap: 10px;
  color: var(--text); font-weight: 700; font-size: 1.05rem; letter-spacing: 0.02em;
}
.brand img { border-radius: 7px; box-shadow: 0 0 16px var(--glow); }
.nav { display: flex; gap: 18px; align-items: center; }
.nav a { color: var(--muted); font-weight: 500; }
.nav a:hover { color: var(--text); }
.nav-cta {
  padding: 8px 14px; border-radius: 999px;
  border: 1px solid var(--line); color: var(--cyan) !important;
  background: rgba(94, 200, 255, 0.08);
}

.hero {
  max-width: 1120px; margin: 12px auto 0; padding: 24px 24px 48px;
  display: grid; grid-template-columns: 1.05fr 0.95fr; gap: 36px; align-items: center;
}
.eyebrow {
  margin: 0 0 10px; color: var(--cyan); font-size: 0.85rem; letter-spacing: 0.12em; text-transform: uppercase;
}
.hero h1 {
  margin: 0; font-family: var(--display); font-size: clamp(2.2rem, 4.5vw, 3.4rem);
  line-height: 1.15; letter-spacing: 0.04em; font-weight: 700;
}
.hero h1 span { color: var(--cyan); }
.lead { margin: 16px 0 22px; color: var(--muted); font-size: 1.08rem; max-width: 36em; }
.hero-actions { display: flex; flex-wrap: wrap; gap: 12px; }
.hero-meta {
  list-style: none; padding: 0; margin: 22px 0 0;
  display: flex; flex-wrap: wrap; gap: 10px 18px; color: var(--muted); font-size: 0.9rem;
}
.hero-meta li::before { content: "▸ "; color: var(--cyan); }

.btn {
  display: inline-flex; align-items: center; justify-content: center;
  padding: 12px 20px; border-radius: 12px; font-weight: 700; border: 1px solid transparent;
  transition: transform 0.15s ease, box-shadow 0.15s ease, background 0.15s ease;
}
.btn:hover { transform: translateY(-1px); }
.btn-primary {
  color: #041018 !important; background: linear-gradient(135deg, #7ad4ff, var(--cyan2));
  box-shadow: 0 8px 28px rgba(42, 168, 239, 0.35);
}
.btn-primary:hover { color: #041018 !important; box-shadow: 0 10px 32px rgba(42, 168, 239, 0.5); }
.btn-ghost {
  color: var(--text) !important; border-color: var(--line); background: rgba(255,255,255,0.03);
}
.btn-lg { padding: 14px 26px; font-size: 1.05rem; }

.hero-visual { display: flex; justify-content: center; }
.device-frame {
  width: min(100%, 340px);
  padding: 12px; border-radius: 22px;
  background: linear-gradient(160deg, rgba(94,200,255,0.25), rgba(255,255,255,0.04));
  box-shadow: 0 20px 60px rgba(0,0,0,0.45), 0 0 40px rgba(42,168,239,0.15);
}
.device-frame img {
  display: block; width: 100%; border-radius: 14px; border: 1px solid rgba(255,255,255,0.08);
}

.strip {
  max-width: 1120px; margin: 0 auto 40px; padding: 0 24px;
  display: grid; grid-template-columns: repeat(4, 1fr); gap: 12px;
}
.strip-item {
  padding: 16px 14px; border-radius: 14px;
  background: var(--panel); border: 1px solid var(--line);
  backdrop-filter: blur(8px);
}
.strip-item strong { display: block; color: var(--cyan); margin-bottom: 4px; }
.strip-item span { color: var(--muted); font-size: 0.88rem; }

.features { max-width: 1120px; margin: 0 auto; padding: 20px 24px 40px; }
.section-head { text-align: center; margin-bottom: 36px; }
.section-head h2 {
  margin: 0 0 8px; font-family: var(--display); letter-spacing: 0.06em; font-size: 1.8rem;
}
.section-head p { margin: 0; color: var(--muted); }

.feature {
  display: grid; grid-template-columns: 1fr 1fr; gap: 28px; align-items: center;
  margin-bottom: 48px; padding: 22px; border-radius: var(--radius);
  background: var(--panel); border: 1px solid var(--line);
}
.feature-flip { direction: rtl; }
.feature-flip > * { direction: ltr; }
.tag {
  display: inline-block; margin-bottom: 8px; color: var(--cyan);
  font-size: 0.82rem; letter-spacing: 0.08em; font-weight: 700;
}
.feature h3 { margin: 0 0 10px; font-size: 1.45rem; }
.feature p { margin: 0 0 12px; color: var(--muted); }
.feature ul { margin: 0; padding-left: 1.1em; color: var(--text); }
.feature li { margin: 4px 0; color: #c5d3e8; }
.feature-media {
  margin: 0; border-radius: 16px; overflow: hidden;
  border: 1px solid rgba(94, 200, 255, 0.18);
  box-shadow: 0 12px 40px rgba(0,0,0,0.35);
}
.feature-media img { display: block; width: 100%; height: auto; }

.faq { max-width: 860px; margin: 0 auto 48px; padding: 0 24px; position: relative; z-index: 1; }
.faq-list { display: grid; gap: 10px; }
.faq-list details {
  background: rgba(16, 28, 48, 0.72);
  border: 1px solid var(--line);
  border-radius: 14px;
  padding: 14px 18px;
}
.faq-list summary {
  cursor: pointer;
  font-weight: 700;
  color: var(--text);
  list-style: none;
}
.faq-list summary::-webkit-details-marker { display: none; }
.faq-list details p {
  margin: 10px 0 0;
  color: var(--muted);
  font-size: 0.95rem;
}

.download { max-width: 1120px; margin: 0 auto 56px; padding: 0 24px; }
.download-card {
  text-align: center; padding: 40px 28px; border-radius: 22px;
  background:
    radial-gradient(ellipse at top, rgba(94,200,255,0.18), transparent 55%),
    linear-gradient(180deg, rgba(16,28,48,0.95), rgba(8,14,24,0.98));
  border: 1px solid var(--line);
  box-shadow: 0 0 0 1px rgba(94,200,255,0.05), 0 24px 60px rgba(0,0,0,0.4);
}
.download-card h2 {
  margin: 0 0 10px; font-family: var(--display); letter-spacing: 0.04em; font-size: 1.7rem;
}
.download-card > p { color: var(--muted); max-width: 36em; margin: 0 auto 22px; }
.download-actions {
  display: flex; flex-wrap: wrap; gap: 12px; justify-content: center; align-items: center;
}
.download-note { margin: 16px 0 0 !important; font-size: 0.88rem; }
.hero-actions { flex-wrap: wrap; }

.site-footer {
  text-align: center; padding: 28px 16px 40px;
  border-top: 1px solid rgba(255,255,255,0.06); color: var(--muted); font-size: 0.9rem;
}
.footer-brand { margin: 0 0 8px; }
.footer-icp { margin: 0; }
.footer-icp a { color: #7f93ad; }
.footer-icp a:hover { color: var(--cyan); }

@media (max-width: 900px) {
  .hero, .feature, .feature-flip { grid-template-columns: 1fr; direction: ltr; }
  .strip { grid-template-columns: 1fr 1fr; }
  .hero { padding-top: 8px; }
  .device-frame { width: min(100%, 300px); }
}
@media (max-width: 560px) {
  .strip { grid-template-columns: 1fr; }
  .topbar { padding: 14px 16px; }
  .nav a:not(.nav-cta) { display: none; }
}