/*通用*/
*{ box-sizing:border-box;}
*::before, *::after{ box-sizing:border-box;}
*:focus{ outline:none;}
html{ -ms-touch-action: none;  /* 阻止windows Phone 的默认触摸事件 */}
/*兼容iphone去除默认input表单默认设置*/

.fl{float:left;}
.fr{float:right;}
.cl{clear:both;}
.show{display:block;}
.hide{display:none;}