#main {margin:40px auto;}
.slidtex {margin-top: 80px ; order: 1; height:15% ; }
#slider {overflow:hidden ; }
#slider ul {display:flex ; padding: 0 ; width:300% ; heigth:800px ; animation: cambio 10s infinite step-start; }
#slider li {list-style:none ; width:100% ; } 
#slider img {width:100% ; }

@keyframes cambio {
       0% {margin-left: 0 ;}   
      30% {margin-left: 0 ;} 

      35% {margin-left: -100% ;}   
      65% {margin-left: -100% ;}

      70% {margin-left: -200% ;}   
      100% {margin-left: -200% ;}
    }

#slider .info {display:flex ; padding: 0 ; width:400% ; heigth:600px ; animation: cambioinfo 10s infinite step-start; }
#slider .info>li {list-style:none ; width:100% ; } 
#slider .info>li img {width:100% ; }

@keyframes cambioinfo {
       
       0% {margin-left: 0 ;}   
      20% {margin-left: 0 ;} 

      25% {margin-left: -100% ;}   
      45% {margin-left: -100% ;}

      50% {margin-left: -200% ;}   
      70% {margin-left: -200% ;}

      75% {margin-left: -300% ;}   
      100% {margin-left: -300% ;}
    }