## margin-top


<!-- CSSJSON.margin-top.description -->

<!-- CSSJSON.margin-top.syntax -->

<!-- CSSJSON.margin-top.values -->

<!-- CSSJSON.margin-top.defaultValue -->

<!-- CSSJSON.margin-top.unixTags -->

**注意**  
app端不支持外边距折叠
3.98以下版本当position:fixed|absolute时,margin不支持auto

<!-- CSSJSON.margin-top.compatibility -->

<!-- CSSJSON.margin-top.reference -->
