.flex-box {
    display: flex;
    display: -moz-box;
    /* Firefox 17- */
    display: -webkit-flex;
    /* Chrome 21+, Safari 6.1+, iOS Safari 7+, Opera 15/16 */
    display: -moz-flex;
    /* Firefox 18+ */
    display: -ms-flexbox;
    /* IE 10 */
}

.flex-wrap {
    -webkit-flex-wrap: wrap;
    -moz-flex-wrap: wrap;
    -ms-flex-wrap: wrap;
    -o-flex-wrap: wrap;
    flex-wrap: wrap;
}

.flex-no-wrap {
    -webkit-flex-wrap: nowrap;
    -moz-flex-wrap: nowrap;
    -ms-flex-wrap: nowrap;
    -o-flex-wrap: nowrap;
    flex-wrap: nowrap;
}

.jc-center {
    -webkit-box-pack: center;
    -ms-justify-content: center;
    -moz-justify-content: center;
    -o-justify-content: center;
    -webkit-justify-content: center;
    justify-content: center;
}

.jc-around {
    -webkit-box-pack: justify;
    -ms-justify-content: space-around;
    -moz-justify-content: space-around;
    -o-justify-content: space-around;
    -webkit-justify-content: space-around;
    -webkit-justify-content: space-around;
    justify-content: space-around;
}

.jc-between {
    -webkit-box-pack: justify;
    -ms-justify-content: space-between;
    -moz-justify-content: space-between;
    -o-justify-content: space-between;
    -webkit-justify-content: space-between;
    -webkit-justify-content: space-between;
    justify-content: space-between;
}

.jc-end {
    -webkit-box-pack: end;
    -ms-justify-content: flex-end;
    -moz-justify-content: flex-end;
    -o-justify-content: flex-end;
    -webkit-justify-content: flex-end;
    -webkit-justify-content: flex-end;
    justify-content: flex-end !important;
}

.jc-start {
    -webkit-box-pack: justify;
    -moz-justify-content: start;
    -webkit-justify-content: flex-start;
    justify-content: flex-start;
}

.flex-y {
    -webkit-box-direction: normal;
    -moz-box-orient: vertical;
    -moz-box-direction: normal;
    -webkit-box-orient: vertical;
    flex-direction: column;
    -webkit-flex-direction: column;
    -ms-flex-direction: column;
    -moz-flex-direction: column;
    -o-flex-direction: column;
}

.ai-center {
    -webkit-box-align: center;
    -moz-align-items: center;
    -ms-align-items: center;
    -o-align-items: center;
    -webkit-align-items: center;
    align-items: center;
}

.ai-end {
    -webkit-box-align: end;
    -moz-align-items: flex-end;
    -ms-align-items: flex-end;
    -o-align-items: flex-end;
    -webkit-align-items: flex-end;
    align-items: flex-end !important;
}

.bg-a{
    background-color: #dadde6!important;
}
.bg-b{
    background-color: #f2f2f2!important;
}