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

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "Microsoft YaHei", sans-serif;
  line-height: 1.6;
  color: #333;
  background: #f5f5f5;
}

nav {
  display: flex;
  flex-wrap: nowrap;
  justify-content: space-between;
  align-items: center;
  background: #fff;
  padding: 1rem 2rem;
  box-shadow: 0 2px 4px rgba(0,0,0,0.1);
}

nav a {
  flex: 1 1 0;
  min-width: 0;
  text-align: center;
  text-decoration: none;
  color: #333;
  padding: 0.5rem;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

nav a:hover {
  color: #007bff;
}

@media (max-width: 768px) {
  nav {
    padding: 0.5rem;
  }

  nav a {
    font-size: 0.85rem;
    padding: 0.3rem 0.2rem;
  }
}

.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 2rem;
}

h1, h2, h3 {
  margin-bottom: 1rem;
  line-height: 1.2;
}

section {
  background: #fff;
  padding: 2rem;
  margin-bottom: 2rem;
  border-radius: 8px;
  box-shadow: 0 2px 8px rgba(0,0,0,0.05);
}

.card {
  border: 1px solid #e0e0e0;
  padding: 1.5rem;
  margin-bottom: 1.5rem;
  border-radius: 6px;
  transition: transform 0.2s, box-shadow 0.2s;
}

.card:hover {
  transform: translateY(-2px);
  box-shadow: 0 4px 12px rgba(0,0,0,0.1);
}

.card h3 {
  margin-bottom: 0.5rem;
}

.card p {
  color: #666;
  margin-bottom: 0.5rem;
}

.card a {
  color: #007bff;
  text-decoration: none;
}

.card a:hover {
  text-decoration: underline;
}

.tags {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin: 1rem 0;
}

.tag {
  background: #e3f2fd;
  color: #1976d2;
  padding: 0.25rem 0.75rem;
  border-radius: 20px;
  font-size: 0.875rem;
}

.info-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
  gap: 1rem;
  margin: 1.5rem 0;
}

.info-item {
  padding: 0.5rem;
  background: #f8f9fa;
  border-radius: 4px;
}

.info-item strong {
  display: block;
  margin-bottom: 0.25rem;
  color: #555;
}