*{
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}
#body{
    width: 7.5rem;
    margin: 0 auto;
    position: relative;
    /*overflow: hidden;*/
    min-height: 100vh;
}
.close{
    width: 0.72rem;
    height: 0.72rem;
    background: url(../images/close.png)no-repeat center/100%;
}

.flex{
    display: flex;
}
.alignCenter{
    align-items: center;
}
.justifyCenter{
    justify-content: center;
}
/* 全局禁止系统字体缩放，兼容所有浏览器 */
html,
body {
  /* 尽量禁止微信再按系统字体倍数放大 */
  -webkit-text-size-adjust: 100% !important;
  text-size-adjust: 100% !important;
  font-size-adjust: none !important;
  max-height: 100vh;
  overflow-x: hidden;
}
/* 页面主容器再加一层保险 */
#body {
  width: 7.5rem;
  margin: 0 auto;
  position: relative;
  min-height: 100vh;
  -webkit-text-size-adjust: 100% !important;
  text-size-adjust: 100% !important;
}