page {
font-family: -apple-system-font,Helvetica Neue, Helvetica,微软雅黑,"Microsoft YaHei", sans-serif;
/* 宽高包括边框 */
box-sizing:border-box;
}
/* 水平居中 */
.horizontal{
display: flex;
align-items: center;
}
/* 平均分布 */
.between{
display: flex;
justify-content: space-between;
}