/*父级*/
    display: box;
    display: -moz-box;
    display: -webkit-box;
    box-orient: horizontal;
    -moz-box-orient: horizontal;
    -webkit-box-orient: horizontal;/*horizontal表横向，vertical表垂直*/
    /*子级*/
     width:0;
    box-sizing: border-box;
    box-flex: 1;
    -moz-box-flex: 1;
    -webkit-box-flex: 1;
    position: relative;

      /*父级*/
    display: -webkit-flex;
    display: -moz-flex;
    display: -ms-flex;
    display: flex;
    /*子级*/
     -webkit-flex: 1;
    -moz-flex: 1;
    -ms-flex: 1;
    flex: 1;