/*纵向排列，居中*/

.flex_box_v {
    display: -webkit-box;
    display: -webkit-flex;
    /*webkit*/
    display: flex;
    -webkit-box-direction: normal;
    -webkit-box-orient: vertical;
    -webkit-flex-direction: column;
    flex-direction: column;
}

.flex_box_h {
    display: -webkit-box;
    display: -webkit-flex;
    /*webkit*/
    display: flex;
    -webkit-box-direction: normal;
    -webkit-box-orient: horizontal;
    -webkit-flex-direction: row;
    flex-direction: row;
}



.flex_box_center {
    -webkit-box-align: center;
    -webkit-align-items: center;
    align-items: center;
    -webkit-box-pack: center;
    -webkit-justify-content: center;
    justify-content: center;
}

.flex_box_ai_center {
    -webkit-box-align: center;
    -webkit-align-items: center;
    align-items: center;
}

.flex_box_jc_center {
    -webkit-box-pack: center;
    -webkit-justify-content: center;
    justify-content: center;
}

.flex_box_jc_between {
    -webkit-box-pack: center;
    -webkit-justify-content: center;
    justify-content: center;
}

.flex_box_jc_space-between {
    -webkit-box-pack: justify;
    -webkit-justify-content: space-between;
    justify-content: space-between;
}

.flex_box_jc_space-around {
    -webkit-box-pack: justify;
    -webkit-justify-content: space-around;
    justify-content: space-around;
}
.flex_box_between_center {
    -webkit-box-pack: justify;
    -webkit-justify-content: space-between;
    justify-content: space-between;
    -webkit-box-align: center;
    -webkit-align-items: center;
    align-items: center;

}


.flex_box_end {
    -webkit-box-pack: justify;
    -webkit-justify-content: flex-end;
    justify-content: flex-end;
}
.flex_box_start {
    -webkit-box-pack: justify;
    -webkit-justify-content: flex-start;
    justify-content: flex-start;
}

.flex_box_grow {
    -webkit-box-flex: 1;
    -webkit-flex: 1;
    flex: 1;
}