vant/lib/index-bar/index.css

:root,:host{--van-index-bar-sidebar-z-index: 2;--van-index-bar-index-font-size: var(--van-font-size-xs);--van-index-bar-index-line-height: var(--van-line-height-xs);--van-index-bar-index-active-color: var(--van-primary-color)}.van-index-bar__sidebar{position:fixed;top:50%;right:0;z-index:var(--van-index-bar-sidebar-z-index);display:flex;flex-direction:column;text-align:center;transform:translateY(-50%);cursor:pointer;-webkit-user-select:none;user-select:none}.van-index-bar__index{padding:0 var(--van-padding-xs) 0 var(--van-padding-md);font-weight:var(--van-font-bold);font-size:var(--van-index-bar-index-font-size);line-height:var(--van-index-bar-index-line-height)}.van-index-bar__index--active{color:var(--van-index-bar-index-active-color);font-weight:700}