* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
  outline: none;
}

html, body{
  width: 100vw;
  height: 100vh;
  font-size: 14px;
  background: #f6f7f8;
  font-family: "Helvetica Neue",Helvetica,"PingFang SC","Hiragino Sans GB","Microsoft YaHei","微软雅黑",Arial,sans-serif;
}

li{
  list-style: none;
}

img{
  border: none;
  
}

a{
  text-decoration: none;
  color: #399bff;
}

a.active,
a:focus{
  outline: none;
  text-decoration: none;
}

ol,
ul,
p,
h1,
h2,
h3,
h4,
h5,
h6{
  padding: 0;
  margin: 0;
}
.yc {
    display:none;
}

.xs {
    display: block;
}