*{
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}
section{
    width: 100%;
    max-width: 1680px;
    height: auto;
    display: flex;
    font-family: sans-serif;
}
.contenido{
    width: 100%;    
    height: 2580px;
    margin: auto;
    background-color: rgba(255, 255, 255, 0.4);
    flex: 1 1%;
    box-sizing: border-box;    
    display: block;
    flex-wrap: wrap;
    margin-bottom: 4px;
}
.cero{
    width: 100%;
    height: 680px;
    margin: auto;
    background: url(imagenes/img-world.jpg);
    overflow: hidden;
    padding: 0;
    background-attachment:fixed;
}
.cero h1{
    width: 100%;
    text-align: center;
    color: #fff;
    font-family: sans-serif;
    font-size: 30px;
}
.cero h3{
    width: 100%;
    text-align: center;
    color: #fff;
    font-family: sans-serif;
    font-size: 24px;
}
.cero a{
    width: 280px;
    height: auto;
    margin: auto;
    text-decoration: none;
    color: #fff;
    text-align: center;
    font-family: sans-serif;
    font-size: 24px;
    display: block;
    padding: 20px;
    background: rgba(255, 102, 0, 0.6);
    font-weight: bold;
}
.cero a:hover{
    color: #fff;
    background: rgba(6,34,110, 0.8);
    text-decoration: none;
}


.cero .linea {  
    width: 560px;
    height: auto;
    margin: auto;
    text-decoration: none;
    text-align: center;
    list-style: none;
    padding: 0;
    padding-top: -20px;
}
.cero .linea p{
    width: 100%;
    height: auto;
    margin: auto;
    display: block;
    padding: 15px 20px;
    color: #fff;
    text-decoration: none;
    font-family: sans-serif;
    text-align: center;
    color: #fff;
    padding: 20px;
    margin: auto;
    font-weight: bold;
}
.cero .linea .cerrar {
    display: block;
    background: #ff6600;
    width: 60px;
    height: 60px;
    margin:  auto;
    text-align: center;
    text-decoration: none;
    font-size: 30px;
    color:#FFF;
    border-radius: 50%;
    line-height: 20px;
    font-family:sans-serif;
    font-weight: bold;
}
.cero .linea .cerrar:hover{
    display: block;
    background: #0033ff;
    width: 60px;
    height: 60px;
    margin:  auto;
    text-align: center;
    text-decoration: none;
    font-size: 30px;
    color:#FFF;
    border-radius: 50%;
    line-height: 20px;
    font-family:sans-serif;
}


.linea {
    margin: 0;
    list-style: none;
    padding: 0;
    display: flex;
    margin-top: 400px
}
.linea p{
    display: block;
    padding: 15px 20px;
    color: #fff;
    text-decoration: none;
    font-family: sans-serif;
    text-align: center;
    color: #fff;
    padding: 20px;
}
.cerrar{
    display: block;
    background: #ff6600;
    width: 60px;
    height: 60px;
    margin:  auto;
    text-align: center;
    text-decoration: none;
    font-size: 30px;
    color:#FFF;
    border-radius: 50%;
    line-height: 56px;
    font-family:sans-serif;
}
.cerrar:hover{
    display: block;
    background: #0033ff;
    width: 60px;
    height: 60px;
    margin:  auto;
    text-align: center;
    text-decoration: none;
    font-size: 30px;
    color:#FFF;
    border-radius: 50%;
    line-height: 56px;
    font-family:sans-serif;
}
.uno{
    width: 100%;
    height: 340px;
    background: #fff;
}
.uno h1{
    font-family:sans-serif;
    text-align: center;
    color: #202020;
    margin: auto;
    font-size: 40px;
    font-weight: bold;
}

.uno  li{
    width: 300px;
    height: 180px;
    margin: auto;
    text-align: center;
}

.unouno{
    width: 100%;
    align-content:  center;
    margin: 0;
    list-style: none;
    padding: 0;
    display: flex;
    margin-top: 2px;
    text-decoration: none;
}

.unouno h3{
    width: 100%;
    height: 20%;
    margin: auto;
    text-align: center;
    color: #fff;
    font-family: sans-serif;
    font-size: 40px;
    margin-top: 40px;
    font-weight: bold;
    text-shadow: 1px 1px 8px #ff6600;
}

.unouno p{
    width: 100%;
    margin: auto;
    text-align: center;
    color: #fff;
    font-family: sans-serif;
    font-size: 15px;
    font-weight: bold;
    margin-top: 12px;
    text-shadow: 1px 1px 8px #ff6600;
}

.pri{
    width: 200px;
    height: 150px;
    margin: auto;
    background: url(imagenes/img-feria.png);
}

.seg{
    width: 200px;
    height: 150px;
    margin: auto;
    background: url(imagenes/img-estad.png);
}


.tri{
    width: 200px;
    height: 150px;
    margin: auto;
    background: url(imagenes/img-deman.png);
}

.dos{
    width: 100%;
    height: 460px;
    background: url(imagenes/img-world01.jpg);
    overflow: hidden;
    padding: 100px;
    background-attachment:fixed;
}
.dos h3{
    width: 100%;
    text-align: center;
    color: #fff;
    font-family: sans-serif;
    font-size: 40px;
}
.cajan{
    width: 100%;
    align-content:  center;
    margin: 0;
    list-style: none;
    padding: 0;
    display: flex;
    margin-top: 2px;
    text-decoration: none;
}
.cajan li{
    width: 300px;
    height: 180px;
    margin: auto;
    background-color: rgba(255, 102, 0, 0.6);
}
.cajan li:hover{
    width: 300px;
    height: 180px;
    margin: auto;
    background-color: rgba(6,34,110, 0.8);
}
.cajan h1{
    width: 100%;
    text-align: center;
    color: #fff;
    font-family: sans-serif;
    font-size: 20px;
    margin-top: 10px;
}
.cajan p{
    width: 90%;
    margin: auto;
    color: #fff;
    font-family: sans-serif;
    font-size: 15px;
    margin-top: 10px;
}

.tres{
    width: 100%;
    height: 380px;
    background: #fff;
    padding-top: 2px;
}
.tres h1{
    width: 100%;
    text-align: center;
    color: #000;
    font-family: sans-serif;
    font-size: 40px;
    font-weight: bold;
}

.trespr{
    width: 100%;
    align-content:  center;
    margin: 0;
    list-style: none;
    padding: 0;
    display: flex;
    margin-top: 2px;
    text-decoration: none;
    margin-top: 20px;
}
.trespr li{
    width: 300px;
    height: 180px;
    margin: auto;
    background-color: rgba(255, 102, 0, 0.6);
}

.trespr h3{
    width: 100%;
    text-align: center;
    color: #fff;
    font-family: sans-serif;
    font-size: 40px;
    margin-top: 40px;
    font-weight: bold;
    text-shadow: 1px 1px 8px #ff6600;
}
.trespr p{
    width: 100%;
    margin: auto;
    color: #fff;
    font-family: sans-serif;
    font-size: 15px;
    text-align: center;
    margin-top: 12px;
    font-weight: bold;
    text-shadow: 1px 1px 8px #ff6600;
}

.trespri{
    width: 200px;
    height: 150px;
    margin: auto;
    background: url(imagenes/img-exp1.png);
}

.tresseg{
    width: 200px;
    height: 150px;
    margin: auto;
    background: url(imagenes/img-exp2.png);
}


.trestri{
    width: 200px;
    height: 150px;
    margin: auto;
    background: url(imagenes/img-exp3.png);
}



.cuatro{ 
    width: 100%;
    height: auto;
    background: url(imagenes/img-world02.jpg);
    overflow: hidden;
    padding: 100px;
    background-attachment:fixed;
}
.cuatro h1{
    width: 100%;
    text-align: center;
    color: #fff;
    font-family: sans-serif;
    font-size: 36px;
    font-weight: bold;
}

.cuatro a{
    width: 180px;
    margin: auto;
    align-content:  center;
    list-style: none;
    padding: 20px;;
    display: flex;
    color: #fff;
    font-weight: bold;
    font-family: sans-serif;
    font-size: 2rem;
    text-align: center;
    background: #ff6600;
    margin-top: 2px;
    text-decoration: none;
}
 .cuatro a:hover{
    font-weight: bold;
    font-family: sans-serif;
    font-size: 2rem;
    color: #fff;
    text-decoration: none;
    background: #0033FF;
}

.cinco{   
    width: 100%;
    height: 300px;
    margin: auto;
    color: #000;
    font-family: sans-serif;
    margin: auto;
}
.cinco div img{
    width: 125px;
    height: auto;
    margin: auto;
    display: block;
}

.cinco h1{
    width: 100%;
    text-align: center;
    color: #143470;
    font-family: sans-serif;
    font-size: 30px;
    font-weight: bold;
}
.cinco p{
   width: 100%;
    text-align: center;
    color: #143470;
    font-family: sans-serif;
    font-size: 14px;
    
}

.contenid{
    width: 100%;
    height: auto;
    background: #143470;
}
@media (min-width:0) and (max-width: 720px){
    .cero h1{
    font-size: 10px;
 }
    .cero h3{
        font-size: 10px;
    }
    .cero a{
        font-size: 8px;
    }
    .uno h1{
        font-size: 10px;
    }
    .unouno h3{
        font-size: 10px;
    }
    .unouno p{
        font-size: 10px;
    }
    .dos h3{
        font-size: 10px;
    }
    .cajan h1{
      font-size: 10px;
    }
    .cajan p{
        font-size: 8px;
    }
    .tres h1{
        font-size: 10px;
    }
    .trespr h3{
        font-size: 10px;
    }
    .trespr p{
        font-size: 8px;
    }
    .cuatro h1{
        font-size: 10px;
    }
    .cuatro a{
        font-size: 10px;
    }
        .cuatro a:hover{
        font-size: 10px;
    }
    .cinco h1{
        font-size: 12px;
    }
}