refactor: 答题组件样式

src/components/answer-explanation/index.vue

@@ -44,6 +44,7 @@ export default {
     }
     .title {
       padding-left: 25rpx;
+      color: #191C27;
     }
   }
   .content {
@@ -55,6 +56,7 @@ export default {
       text-align: left;
       padding: 10rpx 0 0rpx 30rpx;
       line-height: 50rpx;
+      color: #5A6073;
     }
     .lists:nth-of-type(1) {
       color: #2953ff;

src/components/answer-sheet/index.vue

@@ -173,6 +173,7 @@ export default {
       color: #fff;
     }
     .text {
+      color: #191C27;
       padding-left: 20rpx;
       flex: 1;
     }