/*取消按钮点击时有边框响应*/
.btn:focus, .btn:active:focus, .btn.active:focus, .btn.focus, .btn:active.focus, .btn.active.focus {
outline-style: none;
box-shadow: inset 0 0 0;
}
/*取消按钮点击时有边框响应*/
.btn:focus, .btn:active:focus, .btn.active:focus, .btn.focus, .btn:active.focus, .btn.active.focus {
outline-style: none;
box-shadow: inset 0 0 0;
}