* {
    margin: 0;
    padding: 0;
  }
  
  em,
  i {
    font-style: normal;
  }
  
  li {
    list-style: none;
  }
  
  img {
    border: 0;
    vertical-align: middle;
    -webkit-user-select: none;
    -ms-user-select: none;
    -moz-user-select: none;
    -khtml-user-select: none;
    user-select: none;
  }
  
  button {
    cursor: pointer;
  }
  
  a {
    color: #666;
    text-decoration: none;
  }
  
  a:hover {
    color: #c81623;
  }
  
  button,
  input {
    font-family: Microsoft YaHei, tahoma, arial, Hiragino Sans GB, \\5b8b\4f53,
      sans-serif;
  }
  
  html,
  body {
    -webkit-font-smoothing: antialiased;
    background-color: #fff;
    font: 14px/1.5 Microsoft YaHei, tahoma, arial, Hiragino Sans GB, \\5b8b\4f53,
      sans-serif;
    color: #fff;
    width: 100%;
    height: 100%;
    font-size: 100px;
  }
  
  .hide,
  .none {
    display: none;
  }
  
  .clearfix:after {
    visibility: hidden;
    clear: both;
    display: block;
    content: ".";
    height: 0;
  }
  
  .clearfix {
    zoom: 1;
  }
  
  .flex {
    display: flex;
    justify-content: center;
    align-items: center;
  }
  
  .space-between {
    display: flex;
    justify-content: space-between;
    align-items: center;
  }
  
  .flex-start {
    display: flex;
    justify-content: flex-start;
    align-items: center;
  }
  
  .flex-end {
    display: flex;
    justify-content: flex-end;
    align-items: center;
  }
  
  .align-item-start {
    display: flex;
    justify-content: flex-start;
    align-items: flex-start;
  }