@media only screen and (max-width: 479px) {
  body {
    display: none;
  }
}
@media only screen and (min-width: 480px) and (max-width: 959px) {
  body {
    min-width: 480px;
    max-width: 959px;
    width: 100%;
    margin: 0 auto;
    line-height: 1;
    font-family: 'Microsoft YaHei', Arial, Helvetica, sans-serif;
    background-color: #FFFFFF;
  }
  body .logo {
    display: flex;
    width: 100%;
    height: 60px;
    margin: 0 auto;
  }
  body .logo a img {
    height: 60px;
  }
  body .logo div {
    flex: 1;
  }
  body .nav {
    width: 100%;
    height: 34px;
    min-width: 960px;
    background-color: #008CD7;
  }
  body .nav nav {
    display: flex;
    width: 100%;
    margin: 0 auto;
    transition: transform 0.5s ease-in-out;
  }
  body .nav nav a {
    font-size: 16px;
    color: #FFFFFF;
    line-height: 34px;
    text-align: center;
    padding: 0 20px;
  }
  body .nav nav a:hover {
    background-color: #FFFFFF;
    color: #008CD7;
  }
  body .nav .iconfont {
    position: fixed;
    width: 34px;
    height: 34px;
    background-color: #008CD7;
    line-height: 34px;
    text-align: center;
    bottom: 0px;
    color: #FFFFFF;
  }
  body .nav .iconfont:hover {
    cursor: pointer;
  }
  body .nav .icon-zuojiantou- {
    left: 0;
  }
  body .nav .icon-youjiantou {
    right: 0;
  }
}
@media only screen and (min-width: 960px) {
  body {
    min-width: 960px;
    width: 100%;
    margin: 0 auto;
    line-height: 1;
    font-family: 'Microsoft YaHei', Arial, Helvetica, sans-serif;
    background-color: #FFFFFF;
  }
  body .logo {
    display: flex;
    width: 960px;
    height: 60px;
    margin: 0 auto;
  }
  body .logo a img {
    height: 60px;
  }
  body .logo div {
    flex: 1;
  }
  body .nav {
    width: 100%;
    height: 34px;
    min-width: 960px;
    background-color: #008CD7;
  }
  body .nav nav {
    display: flex;
    width: 960px;
    margin: 0 auto;
  }
  body .nav nav span {
    display: none;
  }
  body .nav nav a {
    font-size: 16px;
    color: #FFFFFF;
    line-height: 34px;
    text-align: center;
    padding: 0 10px;
  }
  body .nav nav a:hover {
    background-color: #FFFFFF;
    color: #008CD7;
  }
}