:root {
  --bg: #0b1020;
  --panel: #121a33;
  --line: #33416b;
  --text: #eef1ff;
  --muted: #b5bdd8;
  --accent: #50d9ff;
  --accent-strong: #88ffae;
}
* { box-sizing: border-box; }
html, body {
  margin: 0;
  font-family: "Noto Sans SC", "PingFang SC", "Microsoft YaHei", Arial, sans-serif;
  background: radial-gradient(circle at 18% 12%, #11204a 0%, var(--bg) 34%, #080b18 100%);
  color: var(--text);
}
a { color: var(--accent); }
.site-shell {
  max-width: 1080px;
  margin: 0 auto;
  padding: 28px;
}
.brand {
  display: flex;
  gap: 14px;
  align-items: center;
  padding-bottom: 18px;
  border-bottom: 1px solid var(--line);
}
.logo {
  width: 44px;
  height: 44px;
  border-radius: 50%;
  display: grid;
  place-items: center;
  background: linear-gradient(145deg, #1de9b6, #6c8dff);
  color: #091028;
  font-weight: 700;
  letter-spacing: 1px;
}
.title-wrap h1 {
  margin: 0;
  font-size: clamp(1.8rem, 5vw, 2.6rem);
}
.subtitle {
  color: var(--muted);
  margin-top: 6px;
}
.signal-nav {
  margin-top: 16px;
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}
.signal-nav a {
  background: #1f2e58;
  border: 1px solid #2f4f97;
  border-radius: 999px;
  padding: 8px 14px;
  text-decoration: none;
}
main { margin-top: 26px; }
.panel {
  background: linear-gradient(170deg, rgba(39, 64, 127, 0.68), rgba(16, 29, 61, 0.78));
  border: 1px solid #243c74;
  border-radius: 16px;
  padding: 20px;
  margin: 16px 0 18px;
}
.grid {
  display: grid;
  grid-template-columns: repeat(12, 1fr);
  gap: 14px;
}
.panel h2 { margin: 0 0 10px; }
.signal-rail { display: flex; flex-direction: column; gap: 12px; }
.item {
  background: #121c3a;
  border: 1px solid #2a3f77;
  border-radius: 12px;
  padding: 14px;
}
.item h3 {
  margin: 0;
  font-size: 1.1rem;
}
.item p {
  margin: 8px 0 0;
  color: var(--muted);
}
.callout {
  padding: 14px;
  border-left: 4px solid var(--accent);
  background: rgba(80, 217, 255, 0.12);
}
ul {
  margin: 0;
  padding-left: 20px;
}
li + li { margin-top: 6px; }
footer {
  margin: 22px 0 6px;
  border-top: 1px solid var(--line);
  padding-top: 14px;
  color: var(--muted);
  font-size: .92rem;
}
.wr { color: var(--muted); }
.badge {
  margin-top: 4px;
  font-size: .86rem;
  color: var(--accent);
}
@media (max-width: 768px) {
  .site-shell { padding: 16px; }
  .grid { grid-template-columns: 1fr; }
  .signal-nav a { padding: 6px 10px; }
}