body{
  overflow-x: hidden;
}
header nav .collapse {
    height: 100%;
}

.navbar-ui {

    display: flex;
    justify-content: space-between;
    padding: 0;
    /* 可选：移除默认的填充 */
    margin: 0;
    /* 可选：移除默认的边距 */
    list-style: none;
    /* 可选：移除列表默认样式 */
}
.top-about {
    position: relative;
    width: 100%;
    height: auto;
    /* 或者设置一个固定高度 */
  }
  
  .top-img {
    width: 100%;
    height: auto;
    /* 图片填充div */
    display: block;
  }
  
  .top-text {
    position: absolute;
    left: 12.5%;
    top: 39%;
    font-size: 3.5vh;
    font-family: Microsoft YaHei;
    font-weight: bold;
    color: var(--platform-surface);
  }
  
  .top-text-EN {
    position: absolute;
    left: 12.5%;
    top: 54%;
    font-size: 2vh;
    font-family: Simpel;
    font-weight: 500;
    color: var(--platform-surface);
  }
  
  .mid-container {
    width: 100%;
    max-width: 100%;
    height: auto;
    background-color: var(--platform-page-background);
  }
  
  .mid-div {
    margin-left: 12.5%;
    margin-right: 12.5%;
  }
  
  .mid-title {
    height: 15vh;
    width: 100%;
    border-bottom: rgba(221, 221, 221, 1) 1px solid;
    align-items: center;
    /* 在垂直方向上居中 */
  }
  
  .mid-title ul {
    height: 100%;
    width: 100%;
    align-items: center;
    /* 在垂直方向上居中 */
  }
  
  .mid-title ul li {
    width: 11.46vw;
    height: 2.85vw;
    margin-right: 1vw;
    border-radius: 4px;
    background: var(--platform-surface);
    text-align: center;
    line-height: 2.85vw;
  }
  
  .mid-title ul li a {
    font-family: Microsoft YaHei;
    color: var(--platform-heading);
  }
  
  .mid-title ul li a:hover {
    cursor: pointer;
    text-decoration: none;
  }
  
  .mid-title ul li.active {
    background: var(--platform-heading);
  }
  
  .mid-title ul li.active a {
    color: var(--platform-surface);
  }
.mid-info {
    height: auto;
    margin-top: 8vh;
    padding-bottom: 8vh;
  }
  .top-hidden{
    display: none;
  }

.logo{
  width: 10.729vw;
  height: 3.177vw;
}