css 的flex布局

.flex {
    display: -webkit-box;
    display: -moz-box;
    display: -ms-flexbox;
    display: -webkit-flex;
    display: flex;
}

.flex.flex--reverse {
    -webkit-box-orient: horizontal;
    -moz-box-orient: horizontal;
    -webkit-box-direction: reverse;
    -moz-box-direction: reverse;
    -webkit-flex-direction: row-reverse;
    -ms-flex-direction: row-reverse;
    flex-direction: row-reverse;
}

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

.flex--row.flex--reverse {
    -webkit-box-orient: vertical;
    -moz-box-orient: vertical;
    -webkit-box-direction: reverse;
    -moz-box-direction: reverse;
    -webkit-flex-direction: column-reverse;
    -ms-flex-direction: column-reverse;
    flex-direction: column-reverse;
}

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

.flex--justify-content--space-around {
    -webkit-box-pack: justify;
    -moz-box-pack: justify;
    -ms-flex-pack: distribute;
    -webkit-justify-content: space-around;
    justify-content: space-around;
}

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

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

.flex--justify-content--end {
    -webkit-box-pack: end;
    -moz-box-pack: end;
    -ms-flex-pack: end;
    -webkit-justify-content: flex-end;
    justify-content: flex-end;
}

.flex--align-items--start {
    -webkit-box-align: start;
    -moz-box-align: start;
    -ms-flex-align: start;
    -webkit-align-items: flex-start;
    align-items: flex-start;
}

.flex--align-items--end {
    -webkit-box-align: end;
    -moz-box-align: end;
    -ms-flex-align: end;
    -webkit-align-items: flex-end;
    align-items: flex-end;
}

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

.flex--align-items--baseline {
    -webkit-box-align: baseline;
    -moz-box-align: baseline;
    -ms-flex-align: baseline;
    -webkit-align-items: baseline;
    align-items: baseline;
}

.flex--align-items--stretch {
    -webkit-box-align: stretch;
    -moz-box-align: stretch;
    -ms-flex-align: stretch;
    -webkit-align-items: stretch;
    align-items: stretch;
}

/*.flex--flex-order {
    -webkit-box-ordinal-group: 2;
    -moz-box-ordinal-group: 2;
    -ms-flex-order: 2;
    -webkit-order: 2;
    order: 2
}*/
.flex--flex-grow-all > * {
    -webkit-box-flex: 1;
    -moz-box-flex: 1;
    -webkit-flex-grow: 1;
    -ms-flex-grow: 1;
    flex-grow: 1
}
.flex--flex-grow-last :last-child {
    -webkit-box-flex: 1;
    -moz-box-flex: 1;
    -webkit-flex-grow: 1;
    -ms-flex-grow: 1;
    flex-grow: 1
}

.flex--flex-grow-middle :nth-child(2) {
    -webkit-box-flex: 1;
    -moz-box-flex: 1;
    -webkit-flex-grow: 1;
    -ms-flex-grow: 1;
    flex-grow: 1
}

.flex-center-wrapper {
    display: -webkit-box;
    display: -moz-box;
    display: -ms-flexbox;
    display: -webkit-flex;
    display: flex;

    -webkit-box-pack: center;
    -moz-box-pack: center;
    -ms-flex-pack: center;
    -webkit-justify-content: center;
    justify-content: center;

    -webkit-box-align: center;
    -moz-box-align: center;
    -ms-flex-align: center;
    -webkit-align-items: center;
    align-items: center;
}