样式

src/page-instrument/component/the-music-list/index.module.less

@@ -49,8 +49,20 @@
             overflow-x: hidden;
             overflow-y: auto;
         }
+        .van-tab--active::after{
+            content: '';
+            position: absolute;
+            bottom: 0;
+            left: 50%;
+            transform: translateX(-50%);
+            width: var(--van-tabs-bottom-bar-width);
+            height: var(--van-tabs-bottom-bar-height);
+            background: var(--van-tabs-bottom-bar-color);
+            border-radius: var(--van-tabs-bottom-bar-height);
+        }
         .van-tabs__line{
             transition-duration: 0s !important;
+            display: none;
         }
     }
 }