弹性盒子模型兼容性

弹性盒子模型兼容性：

display: -webkit-flex;
display: -moz-flex;
display: -ms-flex;
display: -o-flex;
display: flex; 

-webkit-align-items: center;
-moz-align-items: center;
-ms-align-items: center; 
-o-align-items: center; 
align-items: center;

-webkit-flex: 1; 
-moz-flex: 1; 
-ms-flex: 1;
-o-flex: 1;
flex: 1;

-webkit-flex-wrap: wrap; 
-moz-flex-wrap: wrap; 
-ms-flex-wrap: wrap; 
-o-flex-wrap: wrap;
flex-wrap: wrap;

-webkit-justify-content: center;
-moz-justify-content: center;
-ms-justify-content: center;
-o-justify-content: center;
justify-content: center;

-webkit-justify-content: space-between; 
-moz-justify-content: space-between; 
-ms-justify-content: space-between; 
-o-justify-content: space-between; 
justify-content: space-between;

-webkit-flex-direction: column;
-moz-flex-direction: column;
-ms-flex-direction: column;
-o-flex-direction: column;
flex-direction: column;

-webkit-justify-content: flex-end;
-moz-justify-content: flex-end; 
-ms-justify-content: flex-end;
-o-justify-content: flex-end; 
justify-content: flex-end;