*{
  box-sizing: border-box;
}
a{
  text-decoration: none;
  color: inherit;
}
h1,h2,h3,h4,h5{
  font-weight: 400;
}
img{
  vertical-align: middle;
}
html{
  scroll-behavior: smooth;
}
body{
  font-family: "Helvetica Neue",Helvetica,"PingFang SC","Hiragino Sans GB","Microsoft YaHei","微软雅黑",Arial,sans-serif;
  color: #444444;
}