Flexbox兼容性

.flex-container{
    display: -webkit-box; /* Chrome 4+, Safari 3.1, iOS Safari 3.2+ */
    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 */
    display: flex; /* Chrome 29+, Firefox 22+, IE 11+, Opera 12.1/17/18, Android 4.4+ */
}

.flex-container {
    display: -moz-box;  /* Firefox */ 
    display: -ms-flexbox;    /* IE10 */ 
    display: -webkit-box;    /* Safari */  
    display: -webkit-flex;    /* Chrome, WebKit */ 
    display: box;  
    display: flexbox;  
    display: flex;
}