* {
  box-sizing: border-box;
  user-select: none;
}

:root {
  --swiper-navigation-size: 44px;
}

body {
  margin: 0;
  position: relative;
  font-size: 14px;
  font-family: 'Microsoft YaHei', 'Hiragino Sans GB', '微软雅黑', '宋体', Arial, Verdana, sans-serif;
  -webkit-font-smoothing: antialiased;
}

body,
html {
  background-color: #f2f7f6;
  font-size: .22rem;
  color: #73797b;
}


html {
  font-size: 14px;
}

@media screen and (min-width: 320px) {
  html {
    font-size: 42.67px;
  }
}

@media screen and (min-width: 360px) {
  html {
    font-size: 48px;
  }
}

@media screen and (min-width: 375px) {
  html {
    font-size: 50px;
  }
}

@media screen and (min-width: 414px) {
  html {
    font-size: 55.2px;
  }
}

@media screen and (min-width: 480px) {
  html {
    font-size: 64px;
  }
}

@media screen and (min-width: 640px) {
  html {
    font-size: 85.33px;
  }
}

@media screen and (min-width: 750px) {
  html {
    font-size: 100px;
  }
}


header {
  position: fixed;
  top: 0;
  left: 50%;
  transform: translate3d(-50%, 0, 0);
  width: 100%;
  max-width: 750px;
  height: 1rem;
  line-height: 1rem;
  background-color: hsla(0, 0%, 100%, .85);
  z-index: 3;
}

ul,
li,
img,
span,
p,
font,
strong,
em,
ol,
h1,
h2,
h3,
h4,
h5,
h6,
dl,
dt,
dd,
input,
tboby,
form {
  margin: 0;
  padding: 0;
  border: 0;
  list-style: none;
}

a,
i,
b,
font,
strong,
span,
h1,
h2,
h3,
h4,
h5,
h6,
p,
ul,
li,
div,
section {
  outline: 0;
  -ms-text-size-adjust: 100%;
  -webkit-text-size-adjust: 100%;
  -webkit-tap-highlight-color: transparent;
  -webkit-touch-callout: none;
  -webkit-focus-ring-color: rgba(0, 0, 0, 0);
}