语音矩阵全屏连接线，黑暗模式变白色背景

src/components/Adult/preview/VoiceMatrixFullscreen.vue

@@ -1041,6 +1041,8 @@ $dark-color-play: #fff2c6;
       }
 
       .connection {
+        background-color: #fff !important;
+
         &.highlight-bc-,
         &.highlight-bc-red,
         &.highlight-bc-brown,