:root {
  color-scheme: dark;
  font-family: "Segoe UI", system-ui, sans-serif;
  line-height: 1.65;
  background: #0f1419;
  color: #e8edf4;
}

body {
  margin: 0;
  padding: 1.5rem 1.25rem 3rem;
}

main {
  max-width: 720px;
  margin: 0 auto;
}

.site-nav {
  display: flex;
  flex-wrap: wrap;
  gap: 0.35rem 0.75rem;
  font-size: 0.88rem;
  margin-bottom: 1.25rem;
  color: #8b9cb3;
}

.site-nav a {
  color: #34d399;
  text-decoration: none;
}

.site-nav a:hover {
  text-decoration: underline;
}

.site-nav .sep {
  color: #4a5568;
}

h1 {
  font-size: 1.65rem;
  margin: 0 0 0.35rem;
  line-height: 1.25;
}

.lead {
  font-size: 1.05rem;
  color: #b8c5d6;
  margin: 0.75rem 0 1.5rem;
}

.muted {
  color: #8b9cb3;
  font-size: 0.9rem;
}

h2 {
  font-size: 1.15rem;
  margin: 2rem 0 0.65rem;
  color: #f0f4f8;
}

h3 {
  font-size: 1rem;
  margin: 1.25rem 0 0.5rem;
  color: #d1dae6;
}

p {
  margin: 0.65rem 0;
}

ul,
ol {
  padding-left: 1.35rem;
  margin: 0.5rem 0 1rem;
}

li {
  margin-bottom: 0.45rem;
}

a {
  color: #34d399;
}

.note {
  border-left: 3px solid #34d399;
  background: #1a2332;
  padding: 0.75rem 1rem;
  border-radius: 0 6px 6px 0;
  margin: 1.25rem 0;
  font-size: 0.95rem;
}

.note strong {
  color: #34d399;
}

.article-card {
  border: 1px solid #2d3a4f;
  border-radius: 8px;
  padding: 1rem 1.1rem;
  margin-bottom: 0.85rem;
  background: #1a2332;
  transition: border-color 0.15s;
}

.article-card:hover {
  border-color: #34d399;
}

.article-card h2 {
  margin: 0 0 0.35rem;
  font-size: 1.05rem;
}

.article-card p {
  margin: 0;
  font-size: 0.92rem;
  color: #b8c5d6;
}

.article-card a {
  text-decoration: none;
  color: inherit;
  display: block;
}

.article-card a:hover h2 {
  color: #34d399;
}

.tag {
  display: inline-block;
  font-size: 0.72rem;
  font-weight: 600;
  padding: 0.1rem 0.45rem;
  border-radius: 4px;
  margin-right: 0.35rem;
  vertical-align: middle;
  background: #243044;
  color: #8b9cb3;
}

.lang-zh,
.lang-en {
  display: none;
}

table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.92rem;
  margin: 1rem 0;
}

th,
td {
  border: 1px solid #2d3a4f;
  padding: 0.5rem 0.65rem;
  text-align: left;
}

th {
  background: #1a2332;
  color: #b8c5d6;
}