:root {
  --bg: #0f1419;
  --card: #1a2332;
  --text: #e7ecf3;
  --muted: #9aa8b8;
  --accent: #6cb6ff;
  --border: #2a3648;
  --max: 720px;
}
* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  font-family: "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", system-ui, sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.7;
  font-size: 16px;
}
a { color: var(--accent); text-decoration: none; }
a:hover { text-decoration: underline; }
.wrap { max-width: var(--max); margin: 0 auto; padding: 0 1.1rem 3rem; }
header {
  border-bottom: 1px solid var(--border);
  background: rgba(15, 20, 25, 0.92);
  position: sticky; top: 0; z-index: 10;
  backdrop-filter: blur(8px);
}
.nav {
  max-width: var(--max); margin: 0 auto;
  padding: 0.85rem 1.1rem;
  display: flex; flex-wrap: wrap; gap: 0.75rem 1.1rem;
  align-items: center; justify-content: space-between;
}
.brand { font-weight: 700; color: var(--text); letter-spacing: 0.02em; }
.brand:hover { text-decoration: none; }
.nav-links { display: flex; flex-wrap: wrap; gap: 0.9rem; }
.nav-links a { color: var(--muted); font-size: 0.95rem; }
.nav-links a:hover, .nav-links a[aria-current="page"] { color: var(--text); }
.hero { padding: 2.2rem 0 1.2rem; }
.hero h1 { margin: 0 0 0.6rem; font-size: 1.75rem; line-height: 1.3; }
.lead { color: var(--muted); margin: 0; }
.notice {
  margin: 1.2rem 0 0;
  padding: 0.9rem 1rem;
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 10px;
  color: var(--muted);
  font-size: 0.95rem;
}
.cards { display: grid; gap: 1rem; margin: 1.6rem 0; }
.card {
  display: block; padding: 1.1rem 1.15rem;
  background: var(--card); border: 1px solid var(--border);
  border-radius: 12px; color: inherit;
}
.card:hover { border-color: var(--accent); text-decoration: none; }
.card h2 { margin: 0 0 0.35rem; font-size: 1.15rem; }
.card p { margin: 0; color: var(--muted); font-size: 0.95rem; }
.list { list-style: none; padding: 0; margin: 1.2rem 0; }
.list li {
  border-bottom: 1px solid var(--border);
  padding: 0.95rem 0;
}
.list li:first-child { border-top: 1px solid var(--border); }
.meta { color: var(--muted); font-size: 0.85rem; margin-bottom: 0.25rem; }
article h1 { font-size: 1.55rem; margin: 1.6rem 0 0.4rem; line-height: 1.35; }
article .meta { margin-bottom: 1.2rem; }
article p { margin: 0 0 1rem; }
article ul { padding-left: 1.2rem; color: var(--muted); }
article ul li { margin: 0.35rem 0; }
.back { display: inline-block; margin: 1.4rem 0 0; color: var(--muted); font-size: 0.95rem; }
footer {
  margin-top: 2.5rem; padding-top: 1.4rem;
  border-top: 1px solid var(--border);
  color: var(--muted); font-size: 0.85rem;
}
footer p { margin: 0.35rem 0; }
@media (max-width: 480px) {
  .hero h1, article h1 { font-size: 1.35rem; }
  .nav { gap: 0.5rem; }
}