* {
      margin: 0;
      padding: 0;
      box-sizing: border-box;
    }

    a {
      text-decoration: none;
      color: #000000;
    }

    li {
      list-style: none;
    }

    body {
      background-color: #eee;
    }

    input,
    textarea {
      outline: none;
    }

    .container {
      width: 1200px;
      background-color: #ffffff;
      margin: 0 auto;
    }

    .banner {
      width: 100%;
      height: 450px;
    }

    .banner img {
      width: 100%;
      height: 100%;
    }

    .nav {
      width: 100%;
      height: 60px;
    }

    .nav ul li {
      float: left;
      width: 240px;
      text-align: center;
      line-height: 60px;
      color: #ffffff;
      font-size: 20px;
      background: #1d86d2;
    }

    .nav ul li:hover {
      background-color: #fbfbfb;
      color: #000000;
    }
    
    .nav ul li>a {
      color: #fff;
    }

    .nav li:hover>a {
      color: #000000;
    }

    footer {
      margin-top: 20px;
      width: 1200px;
      height: 60px;
      text-align: center;
      line-height: 60px;
      color: #fff;
      font-size: 18px;
      background: #1d86d2;
      letter-spacing: 6px;
    }