//伸缩盒（旧） @mixin box{display: -webkit-box;display: box;} @mixin pack-c{@include box;-webkit-box-pack:center;box-pack:center;} @mixi
//伸缩盒（旧） @mixin box{display: -webkit-box;display: box;} @mixin pack-c{@include box;-webkit-box-pack:center;box-pack:center;} @mixi
