vant/lib/sidebar-item/index.css

:root,:host{--van-sidebar-font-size: var(--van-font-size-md);--van-sidebar-line-height: var(--van-line-height-md);--van-sidebar-text-color: var(--van-text-color);--van-sidebar-disabled-text-color: var(--van-text-color-3);--van-sidebar-padding: 20px var(--van-padding-sm);--van-sidebar-active-color: var(--van-active-color);--van-sidebar-background: var(--van-background);--van-sidebar-selected-font-weight: var(--van-font-bold);--van-sidebar-selected-text-color: var(--van-text-color);--van-sidebar-selected-border-width: 4px;--van-sidebar-selected-border-height: 16px;--van-sidebar-selected-border-color: var(--van-primary-color);--van-sidebar-selected-background: var(--van-background-2)}.van-sidebar-item{position:relative;display:block;box-sizing:border-box;padding:var(--van-sidebar-padding);overflow:hidden;color:var(--van-sidebar-text-color);font-size:var(--van-sidebar-font-size);line-height:var(--van-sidebar-line-height);background:var(--van-sidebar-background);cursor:pointer;-webkit-user-select:none;user-select:none}.van-sidebar-item:active{background-color:var(--van-sidebar-active-color)}.van-sidebar-item:not(:last-child):after{border-bottom-width:1px}.van-sidebar-item__text{word-break:break-all}.van-sidebar-item--select{color:var(--van-sidebar-selected-text-color);font-weight:var(--van-sidebar-selected-font-weight)}.van-sidebar-item--select,.van-sidebar-item--select:active{background-color:var(--van-sidebar-selected-background)}.van-sidebar-item--select:before{position:absolute;top:50%;left:0;width:var(--van-sidebar-selected-border-width);height:var(--van-sidebar-selected-border-height);background-color:var(--van-sidebar-selected-border-color);transform:translateY(-50%);content:""}.van-sidebar-item--disabled{color:var(--van-sidebar-disabled-text-color);cursor:not-allowed}.van-sidebar-item--disabled:active{background-color:var(--van-sidebar-background)}