body {
  font-family: "Segoe UI", "PingFang SC", sans-serif;
  margin: 0;
  background: #f9f9f9;
  color: #333;
}
header {
  text-align: center;
  padding: 2rem 1rem;
}
header h1 {
  margin: 0;
  font-size: 2rem;
}
section {
  max-width: 1000px;
  margin: 2rem auto;
  padding: 0 1rem;
}
section h2 {
  margin-bottom: 1rem;
  color: #444;
  font-size: 1.3rem;
  border-left: 4px solid #0078d7;
  padding-left: 0.5rem;
}
.container {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
  gap: 1rem;
}
.card {
  background: #fff;
  border-radius: 10px;
  padding: 1rem;
  text-align: center;
  box-shadow: 0 2px 6px rgba(0,0,0,0.1);
  transition: transform 0.2s;
}
.card:hover {
  transform: translateY(-5px);
}
.card a {
  text-decoration: none;
  color: #333;
  font-weight: bold;
  display: block;
}
.card small {
  color: #888;
}
footer {
  text-align: center;
  padding: 2rem 1rem;
  font-size: 0.9rem;
  color: #666;
}