h1#preguntas
       {
         margin-top: 5%;
         margin-bottom: 5%;
         color: #000;
         border-bottom: 8%;
       }
       h4#next
       {
         color: rgb(80, 64, 174);
         font-weight: bold;
         font-size: 180%;
       }
       h4#next
       {
         margin-bottom: 5%;
       }
       section#seccion2
       {
         margin-bottom: 7%;
       }
       a
       {
         text-decoration: none;
       }
       .linea
       {
         text-decoration: none;
       }
       div.panel-heading
       {
          background-color: red;
       }
       div.accordion.panel-group
       {
         background-color: #E0E0E0;
       }

       .panel-default>.panel-heading 
        {
        color: #919191;
        background-color: #E0E0E0;
        }
        .panel-default>.panel-heading:hover 
        {
           color: #000;
        }

        .panel-group 
        {
          background-color: #E0E0E0;
        }