* {
    padding: 0;
    margin: 0;
  }

  html {
    width: 100%;
  }

  body {
    width: 100%;
    background-color: #fff;
    font-size: 1vw;
    box-sizing: border-box;
  }

  header {
    height: 4vw;
    line-height: 4vw;
    width: 100%;
    padding: 0px 5vw;
    box-sizing: border-box;
    position: fixed;
    top: 0;
    z-index: 99;
    background: #122529;
    color: #fff;
  }
nav{
    display: flex;
    justify-content: space-between;
}
  nav img {
    width: 2vw;
    height: 2vw;  
    vertical-align: middle;
  }
nav .logoname{
  width: 20vw;
}
  nav ul {
    list-style-type: none;
  }


  nav li {
    float: left;
    
    margin-right: 2vw;
    opacity: 1;
    display: block;
    text-align: center;
   
    box-sizing: border-box;
    padding: 0 1vw;
    box-sizing: border-box;
    height: 2vw;
    margin-top: 1vw;
    line-height: 2vw;
    cursor: pointer;
  }
  nav .activeclass{
    border-radius: 1vw;
    background: #479FB5;
    color: #fff;
    font-weight: bold;
  }

  nav li a {
    text-decoration: none;
    color: #fff;
    display: block; 
    width: 100%;
    height: 100%;
  }

  nav li:hover {
    border-radius: 1vw;
    background: #479FB5;
    color: #fff;
    font-weight: bold;
  }
  

  section {
    margin-top: 10vw;
    width: 100%;
  }
  #foot{
   background: black;
   text-align: center;
   padding: 4vw 0 1vw;
  }
.footlog img{
  width: 20vw;
  margin-bottom: 2vw;
}

.navss{
  margin-bottom: 3vw;
  
}
.navss ul{
  display: flex;
  justify-content: center;
  
}
.navss li {
  display: block; 
  margin-right: 2vw;
}
.navss li a{
  display: block; 
  text-decoration: none;
  color: #fff;
}
.copytext{
  color: #fff;
  font-size: .9vw;
}