:root {
  --bg: #0f1419;
  --surface: #1a2332;
  --surface2: #243044;
  --border: #2d3a4f;
  --text: #e7ecf3;
  --muted: #8b9cb3;
  --accent: #5b9fd4;
  --accent2: #7ec8a3;
  --warn: #e8b86d;
  --radius: 12px;
  --font: "Segoe UI", "PingFang SC", "Microsoft YaHei", sans-serif;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  min-height: 100vh;
  font-family: var(--font);
  background: radial-gradient(ellipse 120% 80% at 50% -20%, #1e3a5f 0%, var(--bg) 55%);
  color: var(--text);
  line-height: 1.6;
}

a {
  color: var(--accent);
  text-decoration: none;
}

a:hover {
  text-decoration: underline;
}

.site-header {
  padding: 2.5rem 1.5rem 1.5rem;
  text-align: center;
  border-bottom: 1px solid var(--border);
  background: rgba(15, 20, 25, 0.6);
  backdrop-filter: blur(8px);
}

.site-header h1 {
  margin: 0 0 0.35rem;
  font-size: 1.75rem;
  font-weight: 600;
  letter-spacing: 0.02em;
}

.site-header p {
  margin: 0;
  color: var(--muted);
  font-size: 0.95rem;
}

.site-nav {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem 1rem;
  justify-content: center;
  margin-top: 1rem;
}

.site-nav a {
  font-size: 0.875rem;
  color: var(--muted);
}

.site-nav a.active,
.site-nav a:hover {
  color: var(--accent);
}

.container {
  max-width: 1100px;
  margin: 0 auto;
  padding: 2rem 1.25rem 3rem;
}

.grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 1rem;
}

.card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.25rem 1.35rem;
  transition: border-color 0.15s, transform 0.15s;
}

.card:hover {
  border-color: var(--accent);
  transform: translateY(-2px);
}

.card h2 {
  margin: 0 0 0.5rem;
  font-size: 1.05rem;
  font-weight: 600;
}

.card p {
  margin: 0 0 1rem;
  font-size: 0.875rem;
  color: var(--muted);
}

.card .links {
  display: flex;
  flex-direction: column;
  gap: 0.35rem;
}

.card .links a {
  font-size: 0.875rem;
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
}

.tag {
  display: inline-block;
  font-size: 0.7rem;
  padding: 0.15rem 0.45rem;
  border-radius: 4px;
  background: var(--surface2);
  color: var(--accent2);
  margin-left: 0.35rem;
  vertical-align: middle;
}

.tag.live {
  color: var(--warn);
}

.section-title {
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--muted);
  margin: 2rem 0 0.75rem;
}

.article {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.5rem 1.75rem;
  max-width: 900px;
  margin: 0 auto;
}

.article h1 {
  font-size: 1.5rem;
  margin-top: 0;
  border-bottom: 1px solid var(--border);
  padding-bottom: 0.75rem;
}

.article h2 {
  font-size: 1.15rem;
  margin-top: 1.75rem;
  color: var(--accent2);
}

.article h3 {
  font-size: 1rem;
  margin-top: 1.25rem;
}

.article table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.875rem;
  margin: 1rem 0;
}

.article th,
.article td {
  border: 1px solid var(--border);
  padding: 0.5rem 0.65rem;
  text-align: left;
}

.article th {
  background: var(--surface2);
}

.article code {
  background: var(--surface2);
  padding: 0.12rem 0.35rem;
  border-radius: 4px;
  font-size: 0.85em;
}

.article pre {
  background: #0a0e14;
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 1rem;
  overflow-x: auto;
  font-size: 0.8rem;
}

.site-footer {
  text-align: center;
  padding: 1.5rem;
  color: var(--muted);
  font-size: 0.8rem;
  border-top: 1px solid var(--border);
}