JSFiddle - React, Tailwind, and code Playground

HTML

<script src="https://code.jquery.com/jquery-1.11.3.js"></script>
<div id="nav">
  <nav>
    <ul>
        <li><a href="#home">Home</a></li>
        <li><a href="#um">Sobre Mim</a></li>
        <li><a href="#dois">Galeria</a></li>
        <li><a href="#tres">Contato</a></li>
    </ul>
 </nav>
 
 <div id="home">
  <div id="um">
</div>

CSS

html {
  height: 100%;
  margin: auto;
}

#nav {
  background: #FFF;
  width: 100%;
}
#nav ul {
  list-style: none;
  margin-left: 400;
  padding: 0;
  line-height: 1;
  display: block;
  zoom: 1;
}
#nav ul:after {
  content: " ";
  display: block;
  font-size: 0;
  height: 0;
  clear: both;
  visibility: hidden;
}
#nav ul li {
  display: inline-block;
  padding: 0;
  margin: 0;
}
#nav.align-left ul li {
  float: left;
}
#nav.align-center ul {
  text-align: center;
}
#nav ul li a {
  color: #000;
  text-decoration: none;
  display: block;
  padding: 15px 25px;
  font-family: 'Open Sans', sans-serif;
  font-weight: 700;
  text-transform: uppercase;
  font-size: 14px;
  position: relative;
  -webkit-transition: color .25s;
  -moz-transition: color .25s;
  -ms-transition: color .25s;
  -o-transition: color .25s;
  transition: color .25s;
}
#nav ul li a:hover {
  color: #333333;
}
#nav ul li a:hover:before {
  width: 100%;
}
#nav ul li a:after {
  content: "";
  display: block;
  position: absolute;
  right: -3px;
  top: 19px;
  height: 6px;
  width: 6px;
  background: #ffffff;
  opacity: .5;
}
#nav ul li a:before {
  content: "";
  display: block;
  position: absolute;
  left: 0;
  bottom: 0;
  height: 3px;
  width: 0;
  background: #333333;
  -webkit-transition: width .25s;
  -moz-transition: width .25s;
  -ms-transition: width .25s;
  -o-transition: width .25s;
  transition: width .25s;
}
#nav ul li.last > a:after,
#nav ul li:last-child > a:after {
  display: none;
}
#nav ul li.active a {
  color: #333333;
}
#nav ul li.active a:before {
  width: 100%;
}
#nav.align-right li.last > a:after,
#nav.align-right li:last-child > a:after {
  display: block;
}
#nav.align-right li:first-child a:after {
  display: none;
}

#home{
  background-color:#06A;
  width: 100%;
  height: auto;
}

#home, #um{ width: 100%; }
#home{
background:url('http://i.imgur.com/9EaNaJb.jpg') 50% 0 no-repeat fixed;
color: #fff;
height: 600px;
margin: 0;
padding: 200px 0 260px 0;
background-size:...

JavaScript

$('a[href^="#"]').on('click', function(event) {

    var target = $( $(this).attr('href') );

    if( target.length ) {
        event.preventDefault();
        $('html, body').animate({
            scrollTop: target.offset().top
        }, 1000);
    }

});



$(function(){
    $.stellar();
});


/*! Stellar.js v0.4.0 | Copyright 2012, Mark Dalgleish | http://markdalgleish.com/projects/stellar.js | http://markdalgleish.mit-license.org */
(function(e,t,n,r){function d(t,n){this.element=t,this.options=e.extend({},s,n),this._defaults=s,this._name=i,this.init()}var i="stellar",s={scrollProperty:"scroll",positionProperty:"position",horizontalScrolling:!0,verticalScrolling:!0,horizontalOffset:0,verticalOffset:0,parallaxBackgrounds:!0,parallaxElements:!0,hideDistantElements:!0,viewportDetectionInterval:1e4,hideElement:function(e){e.hide()},showElement:function(e){e.show()}},o={scroll:{getTop:function(e){return e.scrollTop()},setTop:function(e,t){e.scrollTop(t)},getLeft:function(e){return e.scrollLeft()},setLeft:function(e,t){e.scrollLeft(t)}},position:{getTop:function(e){return parseInt(e.css("top"),10)*-1},setTop:function(e,t){e.css("top",t)},getLeft:function(e){return parseInt(e.css("left"),10)*-1},setLeft:function(e,t){e.css("left",t)}},margin:{getTop:function(e){return parseInt(e.css("margin-top"),10)*-1},setTop:function(e,t){e.css("margin-top",t)},getLeft:function(e){return parseInt(e.css("margin-left"),10)*-1},setLeft:function(e,t){e.css("margin-left",t)}},transform:{getTop:function(e){return e.css(a+"transform")!=="none"?parseInt(e.css(a+"transform").match(/(-?[0-9]+)/g)[5],10)*-1:0},setTop:function(e,t){h(e,t,"Y")},getLeft:function(e){return e.css(a+"transform")!=="none"?parseInt(e.css(a+"transform").match(/(-?[0-9]+)/g)[4],10)*-1:0},setLeft:function(e,t){h(e,t,"X")}}},u={position:{setTop:function(e,t){e.css("top",t)},setLeft:function(e,t){e.css("left",t)}},transform:{setTop:function(e,t,n){h(e,t-n,"Y")},setLeft:function(e,t,n){h(e,t-n,"X")}}},a=function(){var...