CSS卡片布局教程：新手入门指南

<div class="card-container">
  <div class="card">...</div>
  <div class="card">...</div>
  <div class="card">...</div>
</div>

.card {
  border: 1px solid #ddd;
  border-radius: 8px;
  box-shadow: 0 2px 5px rgba(0,0,0,0.1);
  padding: 16px;
  background-color: white;
  width: 250px;
  margin: 10px;
}
.card img {
  width: 100%;
  height: auto;
  border-radius: 4px;
}
.card h3 {
  margin: 10px 0;
  font-size: 18px;
}
.card p {
  color: #666;
  font-size: 14px;
}

.card-container {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 16px;
  padding: 20px;
}

@media (max-width: 768px) {
  .card {
    width: 100%;
  }
}

.card {
  flex: 1 1 250px; /* 最小宽度约250px，可伸缩 */
}