:root {
  --bg: #0b0f17;
  --panel: #111927;
  --accent: #4de0ff;
  --accent-2: #8a5bff;
  --text: #e7edf5;
  --muted: #9fb2c8;
  --border: #1d2a3a;
  --shadow: 0 14px 50px rgba(0, 0, 0, 0.35);
  --radius: 14px;
  --max-width: 1160px;
  font-family: "Inter", "PingFang SC", "Microsoft YaHei", system-ui, -apple-system, sans-serif;
}

* { box-sizing: border-box; }
body {
  margin: 0;
  background: radial-gradient(circle at 20% 20%, rgba(77,224,255,0.06), transparent 35%),
              radial-gradient(circle at 80% 10%, rgba(138,91,255,0.06), transparent 30%),
              var(--bg);
  color: var(--text);
  line-height: 1.6;
}
a { color: var(--accent); text-decoration: none; }
a:hover { color: #7df0ff; }

.top-bar {
  position: sticky;
  top: 0;
  z-index: 20;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 14px 22px;
  background: rgba(11, 15, 23, 0.92);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--border);
}
.brand { display: flex; align-items: center; gap: 12px; }
.brand .logo { width: 44px; height: 44px; }
.brand-name { font-weight: 700; letter-spacing: 0.5px; }
.brand-tag { color: var(--muted); font-size: 13px; }
.nav { display: flex; gap: 14px; }
.nav a { padding: 8px 10px; color: var(--muted); }
.nav a:hover { color: var(--text); }
.nav-toggle { display: none; background: none; border: 1px solid var(--border); color: var(--text); padding: 8px 10px; border-radius: 8px; }

main { max-width: var(--max-width); margin: 0 auto; padding: 30px 18px 60px; }
.hero {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
  gap: 26px;
  background: linear-gradient(135deg, rgba(77,224,255,0.08), rgba(138,91,255,0.08));
  border: 1px solid var(--border);
  border-radius: 20px;
  padding: 28px;
  box-shadow: var(--shadow);
}
.hero-text h1 { font-size: 32px; margin: 6px 0 10px; line-height: 1.3; }
.hero-text h1 span { color: var(--accent); }
.hero-text .lede { color: var(--muted); margin-bottom: 18px; }
.hero-visual img { width: 100%; border-radius: 16px; border: 1px solid var(--border); box-shadow: var(--shadow); object-fit: cover; }
.eyebrow { text-transform: uppercase; letter-spacing: 1px; color: var(--accent); font-size: 12px; margin: 0; }
.cta-group { display: flex; gap: 12px; flex-wrap: wrap; margin-bottom: 12px; }
.btn {
  display: inline-block;
  padding: 12px 16px;
  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.primary { background: linear-gradient(135deg, var(--accent), #7df0ff); color: #04121a; box-shadow: 0 10px 30px rgba(77,224,255,0.25); }
.btn.ghost { border-color: var(--border); color: var(--text); background: rgba(255,255,255,0.04); }
.btn:hover { transform: translateY(-1px); box-shadow: 0 12px 30px rgba(0,0,0,0.25); }
.meta { display: flex; flex-wrap: wrap; gap: 10px; color: var(--muted); font-size: 14px; }

.panel-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 16px;
  margin: 28px 0;
}
.panel {
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 18px;
  box-shadow: var(--shadow);
}
.panel h2 { margin-top: 0; }
.panel ul { padding-left: 18px; margin: 0; color: var(--muted); }

.feature-block {
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 22px;
  box-shadow: var(--shadow);
  margin-bottom: 28px;
}
.feature-block .tags { color: var(--accent); font-weight: 700; }
.feature-block .split { display: grid; gap: 20px; grid-template-columns: repeat(auto-fit, minmax(280px, 1fr)); }
.bullets { padding-left: 18px; color: var(--muted); margin: 0; }

.updates .timeline { display: grid; gap: 14px; }
.updates .entry {
  background: rgba(77,224,255,0.04);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 14px;
}
.updates .time { color: var(--accent); font-weight: 700; margin-bottom: 4px; }
.section-head h2 { margin: 0 0 6px; }
.section-head p { margin: 0 0 14px; color: var(--muted); }

.screens .screen-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 12px;
}
.screens img {
  width: 100%;
  border-radius: 12px;
  border: 1px solid var(--border);
  box-shadow: var(--shadow);
  object-fit: cover;
}

.guide .guide-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 14px;
}
.guide article {
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 14px;
  box-shadow: var(--shadow);
}
.guide ul { margin: 0; padding-left: 18px; color: var(--muted); }

.related .chips {
  list-style: none;
  padding: 0;
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}
.related .chips li {
  padding: 8px 12px;
  border-radius: 999px;
  border: 1px solid var(--border);
  background: rgba(255,255,255,0.04);
  color: var(--text);
}

.faq .faq-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 12px;
}
.faq article {
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 14px;
  box-shadow: var(--shadow);
}

.cta-bottom {
  margin: 30px 0 10px;
  padding: 20px;
  border-radius: 14px;
  border: 1px solid var(--border);
  background: linear-gradient(135deg, rgba(138,91,255,0.12), rgba(77,224,255,0.1));
  box-shadow: var(--shadow);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  flex-wrap: wrap;
}

.footer {
  border-top: 1px solid var(--border);
  padding: 18px;
  background: #0a0d14;
  color: var(--muted);
}
.footer .logo { width: 34px; height: 34px; }
.footer-brand { display: flex; align-items: center; gap: 12px; }
.footer-meta { display: flex; gap: 10px; flex-wrap: wrap; margin: 10px 0; }
.footer-note { font-size: 13px; }

@media (max-width: 768px) {
  .nav { display: none; position: absolute; top: 60px; right: 16px; flex-direction: column; background: #0a0d14; padding: 12px; border: 1px solid var(--border); border-radius: 10px; box-shadow: var(--shadow); }
  .nav.open { display: flex; }
  .nav-toggle { display: block; }
  .hero { grid-template-columns: 1fr; }
  .hero-text h1 { font-size: 26px; }
}