:root {
  color-scheme: light;
  --bg: #f5f7fb;
  --card: #ffffff;
  --text: #0f172a;
  --muted: #64748b;
  --accent: #2563eb;
  --accent-soft: rgba(37, 99, 235, 0.12);
  --border: #e2e8f0;
}

* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

body {
  font-family: "Segoe UI", "PingFang SC", "Microsoft YaHei", sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.6;
}

.container {
  width: min(1100px, 92vw);
  margin: 0 auto;
}

.site-header {
  background: var(--card);
  border-bottom: 1px solid var(--border);
  position: sticky;
  top: 0;
  z-index: 10;
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 1.2rem 0;
}

.brand {
  display: flex;
  flex-direction: column;
}

.brand-title {
  font-size: 1.4rem;
  font-weight: 700;
}

.brand-subtitle {
  font-size: 0.95rem;
  color: var(--muted);
}

.nav {
  display: flex;
  gap: 1.2rem;
  flex-wrap: wrap;
}

.nav-link {
  text-decoration: none;
  color: var(--text);
  font-weight: 600;
  padding: 0.4rem 0.8rem;
  border-radius: 999px;
  transition: all 0.2s ease;
}

.nav-link:hover {
  background: var(--accent-soft);
  color: var(--accent);
}

.section {
  padding: 3rem 0;
}

.section.muted {
  background: var(--card);
  border-radius: 20px;
  padding: 2.5rem;
  margin-bottom: 1.5rem;
  box-shadow: 0 12px 30px rgba(15, 23, 42, 0.05);
}

.section-heading h1,
.section-heading h2 {
  font-size: 2rem;
  margin-bottom: 0.5rem;
}

.section-heading p {
  color: var(--muted);
}

.cards {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 1.6rem;
  margin-top: 2rem;
}

.card {
  background: var(--card);
  padding: 1.6rem;
  border-radius: 18px;
  box-shadow: 0 10px 26px rgba(15, 23, 42, 0.08);
  display: flex;
  flex-direction: column;
  gap: 0.8rem;
}

.card-meta {
  color: var(--muted);
  font-size: 0.85rem;
}

.card h2 {
  font-size: 1.3rem;
}

.card p {
  color: var(--muted);
}

.card-link {
  margin-top: auto;
  text-decoration: none;
  font-weight: 600;
  color: var(--accent);
}

.chips {
  display: flex;
  flex-wrap: wrap;
  gap: 0.8rem;
  margin-top: 1.5rem;
}

.chip {
  background: var(--accent-soft);
  color: var(--accent);
  padding: 0.4rem 1rem;
  border-radius: 999px;
  font-weight: 600;
}

.list {
  display: flex;
  flex-direction: column;
  gap: 1rem;
  margin-top: 1.5rem;
}

.list-item {
  background: var(--card);
  border-radius: 14px;
  padding: 1.2rem 1.5rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 1rem;
  border: 1px solid var(--border);
}

.list-item h3 {
  font-size: 1.1rem;
  margin-bottom: 0.3rem;
}

.list-item p {
  color: var(--muted);
}

.list-date {
  color: var(--muted);
  font-size: 0.9rem;
  white-space: nowrap;
}

.site-footer {
  margin-top: 3rem;
  background: #0f172a;
  color: #e2e8f0;
}

.footer-inner {
  padding: 1.6rem 0;
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 0.6rem;
}

@media (max-width: 720px) {
  .header-inner {
    flex-direction: column;
    align-items: flex-start;
    gap: 1rem;
  }

  .list-item {
    flex-direction: column;
    align-items: flex-start;
  }
}