/* html{font-size:62.5%;}
body{font-size:14px;font-size:1.4rem;font-family:"Microsoft Yahei",arial,sans-serif;position:relative;text-align:center;padding: 0;margin: 0;} */

html {
  height: 100%;
  font-size: 10vw;
  color: #434343;
}
body {
  font-size: 15px;
  width: 100%;
  height: 100%;
  margin: 0 auto;
}
input{
  font-size: 15px;
}
div{
  box-sizing: border-box;
}
img{
  display: block;
}

@media screen and (max-width: 430px) {
  html{
    font-size: 6px;
  }
  /* body{
    min-width: 320px;
  } */
}
@media screen and (min-width: 440px) {
  html{
    font-size: 10px;
  }
  body{
    min-width: 1200px;
  }
}

span{
  line-height: 30px;
}


.flex_x{
  display: flex;
  justify-content: center;
  align-items: center;
}

.flex_y{
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
}

.flex_s_b{
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.shadow{
  box-shadow: 0 0 20px 0px rgba(0,0,0,0.15);
}