修改默认样式

miniprogram_npm/@vant/weapp/count-down/index.wxss

@@ -1 +1 @@
-@import '../common/index.wxss';.van-count-down{color:var(--count-down-text-color,#323233);font-size:var(--count-down-font-size,14px);line-height:var(--count-down-line-height,20px)}
+@import '../common/index.wxss';.van-count-down{color:var(--count-down-text-color,#888888);font-size:var(--count-down-font-size,12px);line-height:var(--count-down-line-height,20px)}