## 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 -->
