@GOLLUM23 esto es lo que estoy haciendo:
< ! DOCTYPE html >
< html >
< head >
< meta charset = "utf-8" >
< title > imvie las mejores guitarras < / title >
< link href = "https://fonts.googleapis.com/css?family=Montserrat|Allerta" rel = "stylesheet" >
< link rel = "stylesheet" href = "css/invie.css" / >
< meta name = "viewport" content = "width=device-width, initial-scale=1, user-scalable=no" / >
< / head >
< body >
< section id = "portada" class = "InvieHero" > < ! -- portada -- >
< header id = "header" class = "InvieHero-header u-wrapper" > < ! -- encabezado -- >
< figure class = "InvieHero-logo" > < ! -- logotipo -- >
< img src = "images/invie.png" srcset = "images/invie.png 1x, images/invie2x.png 2x" width = "186" height = "60" alt = "invie logotipo" / >
< / figure >
< span class = "InvieHero-btn icon-menu" id = "menuicono" > < / span >
< nav class = "InvieHero-navbar" id = "manuactivo" > < ! -- menu -- >
< ul class = "InvieHero-menu" > < ! -- lista desordenada -- >
< li class = "InvieHero-menu-item" > < ! -- elementos listas -- >
< a href = "index.html" > < ! -- enlaces -- >
home
< / a >
< / li >
< li class = "InvieHero-menu-item" > < ! -- elementos listas -- >
< a href = "precios.html" > < ! -- enlaces -- >
precios
< / a >
< / li >
< li class = "InvieHero-menu-item" > < ! -- elementos listas -- >
< a href = "#guitarras" > < ! -- enlaces -- >
guitarras
< / a >
< / li >
< / ul >
< / nav >
< / header >
< div class = "InvieHero-copy u-wrapper" >
< h1 class = "InvieHero-copy-title" > Guitarras < span > Invie < / span > sibles < / h1 >
< h3 class = "InvieHero-copy-subtitle" > se la estrella de rock que siempre quisiste ser < / h3 > < ! -- resumen -- >
< a href = "precios.html" class = "enlacebot" > < button class = "InvieHero-copy-bot" > conoce mas < / button > < / a >
< / div >
< / section >
< section id = "guitarras" class = "InvieGuitars u-wrapper" > < ! -- guitarras -- >
< h2 class = "InvieGuitars-title" > nuestras guitarras < / h2 >
< div class = "u-scrollcontainer" >
< article class = "u-scrollcontainer-itemcontainer" > < ! -- articulo1 -- >
< div class = "u-scrollcontainer-itemcontent" >
< img class = "InvieGuitars-item-img" data - src = "images/invie-acustica.png|images/invie-acustica2x.png" alt = "guitarra invie acustica" width = "350" / >
< div class = "InvieGuitars-item-container" >
< h3 class = "InvieGuitars-item-title" > invie acustica < / h3 >
< ol class = "InvieGuitars-item-list" >
< li > estilo vintage < / li >
< li > madera pura < / li >
< li > incluye estuche de aluminio < / li >
< / ol >
< / div >
< / div >
< / article >
< article class = "u-scrollcontainer-itemcontainer" > < ! -- articulo2 -- >
< div class = "u-scrollcontainer-itemcontent" >
< img class = "InvieGuitars-item-img" data - src = "images/invie-classic.png|images/invie-classic2x.png" alt = "guitarra invie classic" width = "350" / >
< div class = "InvieGuitars-item-container" >
< h3 class = "InvieGuitars-item-title" > invie classic < / h3 >
< ol class = "InvieGuitars-item-list" >
< li > estilo vintage < / li >
< li > liviana < / li >
< li > inicia tu camino como rockstars < / li >
< / ol >
< / div >
< / div >
< / article >
< / div >
< div class = "u-grid u-wrapper" >
< div class = "u-grid-column" > < p > Col1 < / p > < / div >
< div class = "u-grid-column" > < p > Col2 < / p > < / div >
< div class = "u-grid-column" > < p > Col3 < / p > < / div >
< div class = "u-grid-column" > < p > Col4 < / p > < / div >
< div class = "u-grid-column" > < p > Col5 < / p > < / div >
< / div >
< / section >
< footer class = "InvieFooter" >
< div class = "InvieFooter-container u-wrapper" >
< div class = "InvieFooter-contact" >
< img class = "InvieFooter-logo" data - src = "images/invie-white.png|images/invie-white2x.png" alt = "logo invie blanco" >
< a class = "InvieFooter-link" href = "tel:+573024456678" > < strong > Telefono < / strong > < span > 3024456678 < / span > < / a class = "InvieFooter-link" >
< a class = "InvieFooter-link" href = "mailto:ramirezandrew172@gmail.com" > < strong > E - mail < / strong > < span > contacto@invie . com < / span > < / a >
< / div >
< form class = "InvieFooter-form" >
< div class = "InvieFooter-form-colum" >
< label class = "InvieFooter-form-label" for = "nombre" > Nombre < / label >
< input class = "InvieFooter-form-input InvieFooter-form-input--text" type = "text" required id = "nombre" name = "nombre" / >
< label class = "InvieFooter-form-label" for = "email" > Correo < / label >
< input class = "InvieFooter-form-input InvieFooter-form-input--text" type = "email" required id = "email" name = "email" / >
< div class = "sexo" >
< label class = "InvieFooter-form-label" for = "mujer" >
< input class = "InvieFooter-form-input InvieFooter-form-input--radio" type = "radio" id = "mujer" name = "sexo" value = "mujer" / > mujer
< / label >
< label class = "InvieFooter-form-label" for = "hombre" >
< input class = "InvieFooter-form-input InvieFooter-form-input--radio" type = "radio" id = "hombre" name = "sexo" value = "hombre" / > hombre
< / label >
< / div >
< div class = "intereses" >
< label class = "InvieFooter-form-label" for = "cotizacion" >
< input class = "InvieFooter-form-input InvieFooter-form-input--check" type = "checkbox" id = "cotizacion" name = "cotizacion" value = "cotizacion" / > cotizacion
< / label > < br >
< label class = "InvieFooter-form-label" for = "reclamos" >
< input class = "InvieFooter-form-input InvieFooter-form-input--check" type = "checkbox" id = "reclamos" name = "reclamos" value = "reclamos" / > reclamos
< / label > < br >
< label class = "InvieFooter-form-label" for = "comentarios" >
< input class = "InvieFooter-form-input InvieFooter-form-input--check" type = "checkbox" id = "comentarios" name = "comentarios" value = "comentarios" / > comentarios
< / label > < br >
< label class = "InvieFooter-form-label" for = "otros" >
< input class = "InvieFooter-form-input InvieFooter-form-input--check" type = "checkbox" id = "otros" name = "otros" value = "otros" / > otros
< / label >
< / div >
< / div >
< div class = "InvieFooter-form-colum" >
< label class = "InvieFooter-from-label" for = "comentarios" > comentarios < / label >
< textarea class = "InvieFooter-form-input InvieFooter-form-input--textarea" name = "comentarios" id = "casilla" cols = "21" rows = "7" > < / textarea >
< input class = "InvieFooter-form-btn" type = "submit" value = "enviar" class = "boton" / >
< / div >
< / form >
< / div >
< / footer >
< script src = "https://cdnjs.cloudflare.com/ajax/libs/blazy/1.8.2/blazy.min.js" > < / script >
< script src = "https://cdnjs.cloudflare.com/ajax/libs/hammer.js/2.0.8/hammer.min.js" > < / script >
< script src = "accion.js" > < / script >
< / body >
< / html >