:root {
  --bg: #070b14;
  --bg-soft: #0e1524;
  --card: rgba(255,255,255,0.045);
  --card-border: rgba(255,255,255,0.1);
  --text: #e8eefc;
  --muted: #93a0bd;
  --accent: #6ea8ff;
  --accent-2: #5eead4;
  --shadow: 0 24px 80px rgba(0,0,0,0.35);
  --radius: 18px;
  --max: 980px;
  color-scheme: dark;
}
* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  font-family: "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  background:
    radial-gradient(900px 500px at 12% -10%, rgba(110,168,255,0.22), transparent 60%),
    radial-gradient(800px 480px at 100% 0%, rgba(94,234,212,0.12), transparent 55%),
    radial-gradient(700px 400px at 50% 100%, rgba(110,168,255,0.08), transparent 50%),
    var(--bg);
  color: var(--text);
  line-height: 1.65;
  min-height: 100vh;
}
a { color: var(--accent); text-decoration: none; }
a:hover { text-decoration: underline; }
.wrap { width: min(var(--max), calc(100% - 2rem)); margin: 0 auto; }
.nav {
  position: sticky; top: 0; z-index: 20;
  backdrop-filter: blur(14px);
  background: rgba(7,11,20,0.72);
  border-bottom: 1px solid rgba(255,255,255,0.06);
}
.nav-inner {
  display: flex; align-items: center; justify-content: space-between;
  padding: 0.9rem 0; gap: 1rem;
}
.brand { font-weight: 700; letter-spacing: 0.02em; color: var(--text); text-decoration: none; }
.brand:hover { text-decoration: none; }
.nav-links { display: flex; gap: 1rem; flex-wrap: wrap; }
.nav-links a { color: var(--muted); font-size: 0.95rem; }
.nav-links a:hover { color: var(--text); text-decoration: none; }
.hero {
  padding: 4.5rem 0 3rem;
  display: grid;
  gap: 1.4rem;
}
.badge {
  display: inline-flex; align-items: center; gap: 0.4rem;
  width: fit-content;
  padding: 0.28rem 0.75rem;
  border-radius: 999px;
  background: rgba(94,234,212,0.1);
  color: var(--accent-2);
  border: 1px solid rgba(94,234,212,0.25);
  font-size: 0.85rem;
}
h1 {
  margin: 0;
  font-size: clamp(2rem, 5vw, 3rem);
  line-height: 1.15;
  letter-spacing: 0.01em;
}
.lead { margin: 0; max-width: 42rem; color: var(--muted); font-size: 1.08rem; }
.actions { display: flex; gap: 0.75rem; flex-wrap: wrap; margin-top: 0.4rem; }
.btn {
  display: inline-flex; align-items: center; justify-content: center;
  padding: 0.7rem 1.1rem; border-radius: 12px;
  border: 1px solid transparent; font-weight: 600; text-decoration: none;
}
.btn:hover { text-decoration: none; }
.btn-primary { background: linear-gradient(135deg, #6ea8ff, #5b8cff); color: #061018; }
.btn-ghost { background: transparent; color: var(--text); border-color: var(--card-border); }
.btn-ghost:hover { border-color: rgba(255,255,255,0.25); }
section { padding: 1.2rem 0 2.6rem; }
.section-title {
  margin: 0 0 0.35rem;
  font-size: 1.45rem;
}
.section-desc { margin: 0 0 1.3rem; color: var(--muted); }
.grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 1rem;
}
.card {
  background: var(--card);
  border: 1px solid var(--card-border);
  border-radius: var(--radius);
  padding: 1.2rem 1.15rem;
  box-shadow: var(--shadow);
}
.card h3 { margin: 0 0 0.45rem; font-size: 1.12rem; }
.card p { margin: 0; color: var(--muted); }
.tags { display: flex; flex-wrap: wrap; gap: 0.4rem; margin: 0.9rem 0 0.85rem; }
.tag {
  font-size: 0.78rem;
  padding: 0.18rem 0.55rem;
  border-radius: 999px;
  background: rgba(110,168,255,0.12);
  color: #b9d3ff;
  border: 1px solid rgba(110,168,255,0.2);
}
.links { display: flex; gap: 0.85rem; flex-wrap: wrap; }
.about-card {
  display: grid;
  gap: 0.85rem;
}
.meta {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(160px, 1fr));
  gap: 0.75rem;
}
.meta div {
  padding: 0.85rem 0.95rem;
  border-radius: 14px;
  background: rgba(255,255,255,0.03);
  border: 1px solid rgba(255,255,255,0.07);
}
.meta strong { display: block; color: var(--text); margin-bottom: 0.15rem; }
.meta span { color: var(--muted); font-size: 0.92rem; }
footer {
  padding: 2rem 0 2.8rem;
  color: var(--muted);
  border-top: 1px solid rgba(255,255,255,0.06);
  font-size: 0.92rem;
}
.empty {
  color: var(--muted);
  padding: 1rem;
  border: 1px dashed rgba(255,255,255,0.15);
  border-radius: 14px;
}
@media (max-width: 640px) {
  .hero { padding-top: 3rem; }
}