body {
            font: 100%/1.4 Verdana, Arial, Helvetica, sans-serif;
            background: #4E5869;
            margin: 0;
            padding: 0;
            color: #000;
        }

        
        ul,
        ol,
        dl {
            
            padding: 0;
            margin: 0;
        }
        
        h1,
        h2,
        h3,
        h4,
        h5,
        h6,
        p {
            margin-top: 0;

            padding-right: 15px;
            padding-left: 15px;

        }
        
        a img {

            border: none;
        }

        
        a:link {
            color: #414958;
            text-decoration: underline;

        }
        
        a:visited {
            color: #4E5869;
            text-decoration: underline;
        }
        
        a:hover,
        a:active,
        a:focus {

            text-decoration: none;
        }

        
        .container {
            width: 80%;
            max-width: 1260px;

            min-width: 780px;

            background: #FFF;
            margin: 0 auto;

        }

        
        .header {
            background: #6F7D94;
        }

        
        .sidebar1 {
            float: left;
            width: 20%;
            background: #93A5C4;
            padding-bottom: 10px;
        }
        
        .content {
            padding: 10px 0;
            width: 80%;
            float: left;
        }

        
        .content ul,
        .content ol {
            padding: 0 15px 15px 40px;

        }

        
        ul.nav {
            list-style: none;

            border-top: 1px solid #666;

            margin-bottom: 15px;

        }
        
        ul.nav li {
            border-bottom: 1px solid #666;

        }
        
        ul.nav a,
        ul.nav a:visited {

            padding: 5px 5px 5px 15px;
            display: block;

            text-decoration: none;
            background: #8090AB;
            color: #000;
        }
        
        ul.nav a:hover,
        ul.nav a:active,
        ul.nav a:focus {

            background: #6F7D94;
            color: #FFF;
        }

        
        .footer {
            padding: 0px 0;
            background: #6F7D94;
            position: relative;

            clear: both;

        }

        
        .fltrt {

            float: right;
            margin-left: 8px;
        }
        
        .fltlft {

            float: left;
            margin-right: 8px;
        }
        
        .clearfloat {

            clear: both;
            height: 0;
            font-size: 1px;
            line-height: 0px;
        }

        .iframe{

          width: 100%;
          height: 1500px;  /* 100vh视口的100%高度*/
          border: 0;  /*把他自带的边框去，不然会有违和感 */
        }

        .iframe2{

          width: 100%;
          height: 200px;  /* */
          border: 0;  /*把他自带的边框去，不然会有违和感 */
        }