.playground-dd {
    height: 4000px;
    background: #000;
  background-image: url('../img/work.png'); /* 添加背景图片 */
  background-size: cover; /* 确保图片覆盖整个区域，不重复 */
  background-position: center; /* 图片在区域中居中显示 */
  background-attachment: fixed;
  }

  .animation-container {
    position: sticky;
    height: 100vh;
    top: 0;
  }

  .list {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 80%;
    aspect-ratio: 2/1;
    border-radius: 10px;
    display: grid;
    grid-template-columns: repeat(7, 1fr);
    grid-template-rows: repeat(2, 1fr);
    place-items: center;
  }

  .list-item {
    width: 60%;
    aspect-ratio: 1/1;
    background: #fff;
    border-radius: 10px;
  }

  .list-item:nth-child(3n + 1) {
    background: linear-gradient(#3e90f7, #246bf6);
  }
  .list-item:nth-child(3n + 2) {
    background: linear-gradient(#53b655, #469c50);
  }
  .list-item:nth-child(3n + 3) {
    background: linear-gradient(#f3a93c, #f4ad3d);
  }
.icon-link {
    text-decoration: none;
    color: black; /* Or any other color you prefer */
  }
  .icon-link .icon {
    border-radius: 10px;
    display: block;
    width: 100%;
    height: 100%;
    line-height: 100px;
    background-size: cover;
    transition: background-color 0.3s;
  }
  .icon-link:hover .icon {
    background-color: rgba(0,0,0,0.1); /* Slight background on hover */
  }