/* 页脚与头图透明 */
#footer {
    background: transparent !important;
  }
  #page-header {
    background: transparent !important;
  }
  
  /* 白天模式遮罩透明 */
  #footer::before {
    background: transparent !important;
  }
  #page-header::before {
    background: transparent !important;
  }
  
  /* 夜间模式遮罩透明 */
  [data-theme="dark"] #footer::before {
    background: transparent !important;
  }
  [data-theme="dark"] #page-header::before {
    background: transparent !important;
  }


  /* 一级菜单居中 */
#nav .menus_items {
    position: absolute !important;
    width: fit-content !important;
    left: 50% !important;
    transform: translateX(-50%) !important;
  }
  /* 子菜单横向展示 */
  #nav .menus_items .menus_item:hover .menus_item_child {
    display: flex !important;
  }
  /* 这里的2是代表导航栏的第2个元素，即有子菜单的元素，可以按自己需求修改 */
  .menus_items .menus_item:nth-child(2) .menus_item_child {
    left: -125px;
  }

/*哔哩哔哩视频适配*/
.aspect-ratio {
    position: relative;
    width: 90%;
    height: auto;
    padding-bottom: 75%;
    margin: 3% auto;
    text-align: center;
  }
  .aspect-ratio iframe {
    position: absolute;
    width: 100%;
    height: 86%;
    left: 0;
    top: 0;
  }