.wrapper {
    width: 1200px;
    margin: 0 auto;
    overflow: hidden;
}
.flexa-container{
    display: -moz-flex;
    display: -o-flex;
    display: -webkit-box;
    display: -moz-box;
    display: -ms-flexbox;
    display: flex;
}

.flexa-justify-around{
    -moz-justify-content: space-around;
    -o-justify-content: space-around;
    -ms-flex-pack: distribute;
    justify-content: space-around;
}
.flexa-justify-center{
    -webkit-box-pack: center;
    -moz-box-pack: center;
    -ms-flex-pack: center;
    justify-content: center;
}
.flexa-justify-between{
    -moz-justify-content: space-between;
    -o-justify-content: space-between;
    -webkit-box-pack: justify;
    -moz-box-pack: justify;
    -ms-flex-pack: justify;
    justify-content: space-between;
}
.flexa-justify-start{
    -webkit-box-pack: start;
    -moz-box-pack: start;
    -ms-flex-pack: start;
    justify-content: flex-start;
}
.flexa-justify-end{
    -webkit-box-pack: end;
    -moz-box-pack: end;
    -ms-flex-pack: end;
    justify-content: flex-end;
}


.flexa-align-center{
    -moz-align-items: center;
    -o-align-items: center;
    -webkit-box-align: center;
    -moz-box-align: center;
    -ms-flex-align: center;
    align-items: center;
}
.flexa-align-start{
    -webkit-box-align:start;
    -moz-box-align:start;
    -ms-flex-align:start;
    align-items:flex-start;
}
.flexa-align-end{
    -webkit-box-align:end;
    -moz-box-align:end;
    -ms-flex-align:end;
    align-items:flex-end;
}
/*将占满整个容器的高度*/
.flexa-align-stretch{
    -webkit-box-align:stretch;
    -moz-box-align:stretch;
    -ms-flex-align:stretch;
    align-items:stretch;
}

/*换行*/
.flexa-wrap{
    -ms-flex-wrap: wrap;
    flex-wrap: wrap;
}
/*不换行*/
.flexa-nowrap{
    -ms-flex-wrap: nowrap;
    flex-wrap: nowrap;
}
/*不均匀缩放*/
.flexa-shrink{
    -ms-flex-negative:0;
    flex-shrink:0
}


.clearfix::after,
.clearfix::before {
    content: " ";
    display: table;
}
.clearfix::after {
    clear: both;
}

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