样式优化等

src/components/cme/change-card.vue

@@ -156,11 +156,11 @@ export default {
     .cover {
       position: relative;
       top: px2rem(-77px);
-      z-index: 1;
+      z-index: 1000;
       height: px2rem(2px);
       margin-left: px2rem(58px);
       margin-right: px2rem(2px);
-      background: #fff;
+      background: #000;
     }
     .code {
       display: flex;