body {
  margin: 0;
  padding: 0;
  font-family: sans-serif;
  background: #f0f0f0;
}

.grid-container {
  display: grid;
  gap: 1rem;
  padding: 1rem;
  grid-template-columns: repeat(auto-fit, minmax(720px, 1fr));
}

.project {
  background: white;
  border-radius: 8px;
  box-shadow: 0 4px 10px rgba(0, 0, 0, 0.1);
  overflow: hidden;
  aspect-ratio: 9 / 9 ; /* 或使用固定高度 */
}

.project iframe {
  width: 100%;
  height: 100%;
  border: none;
}