.tag-cloud {
  padding: 20px;
}

.tag-cloud .tag {
    display: inline-block;
    text-decoration: none;
    padding: 5px 10px;
    margin: 5px;
    border-radius: 5px;
    cursor: pointer;
    background-color: #fefefe;
    transition: color 0.3s ease;
}

.tag-cloud a.selected {
  font-size: 24px;
  font-weight: bold;
  background-color: #e0e0e0;
}

.tag:hover {
    transform: scale(2.0); /* 悬停时放大 */
}