问当我在全屏滚动时，我的最后一个过渡不会显示

EN

skrollr.init({
  forceHeight: false
});

/*!
 * Plugin for skrollr.
 * This plugin makes hashlinks scroll nicely to their target position.
 *
 * Alexander Prinzhorn - https://github.com/Prinzhorn/skrollr
 *
 * Free to use under terms of MIT license
 */
(function(document, window) {
  'use strict';

  var DEFAULT_DURATION = 500;
  var DEFAULT_EASING = 'sqrt';

  var MENU_TOP_ATTR = 'data-menu-top';
  var MENU_OFFSET_ATTR = 'data-menu-offset';

  var skrollr = window.skrollr;
  var history = window.history;
  var supportsHistory = !!history.pushState;

  /*
  	Since we are using event bubbling, the element that has been clicked
  	might not acutally be the link but a child.
  */
  var findParentLink = function(element) {
    //Yay, it's a link!
    if (element.tagName === 'A') {
      return element;
    }

    //We reached the top, no link found.
    if (element === document) {
      return false;
    }

    //Maybe the parent is a link.
    return findParentLink(element.parentNode);
  };

  /*
  	Handle the click event on the document.
  */
  var handleClick = function(e) {
    //Only handle left click.
    if ((e.which || e.button) !== 1) {
      return;
    }

    var link = findParentLink(e.target);

    //The click did not happen inside a link.
    if (!link) {
      return;
    }

    if (handleLink(link)) {
      e.preventDefault();
    }
  };

  /*
  	Handles the click on a link. May be called without an actual click event.
  	When the fake flag is set, the link won't change the url and the position won't be animated.
  */
  var handleLink = function(link, fake) {
    //Don't use the href property (link.href) because it contains the absolute url.
    var href = link.getAttribute('href');

    //Check if it's a hashlink.
    if (!/^#/.test(href)) {
      return false;
    }

    //Now get the targetTop to scroll to.
    var targetTop;

    //If there's a data-menu-top attribute, it overrides the actuall anchor offset.
    var menuTop = link.getAttribute(MENU_TOP_ATTR);

    if (menuTop !== null) {
      targetTop = +menuTop;
    } else {
      var scrollTarget = document.getElementById(href.substr(1));

      //Ignore the click if no target is found.
      if (!scrollTarget) {
        return false;
      }

      targetTop = _skrollrInstance.relativeToAbsolute(scrollTarget, 'top', 'top');

      var menuOffset = scrollTarget.getAttribute(MENU_OFFSET_ATTR);

      if (menuOffset !== null) {
        targetTop += +menuOffset;
      }
    }

    if (supportsHistory && !fake) {
      history.pushState({
        top: targetTop
      }, '', href);
    }

    //Now finally scroll there.
    if (_animate && !fake) {
      _skrollrInstance.animateTo(targetTop, {
        duration: _duration(_skrollrInstance.getScrollTop(), targetTop),
        easing: _easing
      });
    } else {
      defer(function() {
        _skrollrInstance.setScrollTop(targetTop);
      });
    }

    return true;
  };

  var defer = function(fn) {
    window.setTimeout(fn, 1);
  };

  /*
  	Global menu function accessible through window.skrollr.menu.init.
  */
  skrollr.menu = {};
  skrollr.menu.init = function(skrollrInstance, options) {
    _skrollrInstance = skrollrInstance;

    options = options || {};

    _easing = options.easing || DEFAULT_EASING;
    _animate = options.animate !== false;
    _duration = options.duration || DEFAULT_DURATION;

    if (typeof _duration === 'number') {
      _duration = (function(duration) {
        return function() {
          return duration;
        };
      }(_duration));
    }

    //Use event bubbling and attach a single listener to the document.
    skrollr.addEvent(document, 'click', handleClick);

    if (supportsHistory) {
      window.addEventListener('popstate', function(e) {
        var state = e.state || {};
        var top = state.top || 0;

        defer(function() {
          _skrollrInstance.setScrollTop(top);
        });
      }, false);
    }
  };

  //Private reference to the initialized skrollr.
  var _skrollrInstance;

  var _easing;
  var _duration;
  var _animate;

  //In case the page was opened with a hash, prevent jumping to it.
  //http://stackoverflow.com/questions/3659072/jquery-disable-anchor-jump-when-loading-a-page
  defer(function() {
    if (window.location.hash) {
      window.scrollTo(0, 0);

      if (document.querySelector) {
        var link = document.querySelector('a[href="' + window.location.hash + '"]');

        if (link) {
          handleLink(link, true);
        }
      }
    }
  });
}(document, window));

var s = skrollr.init( /*other stuff*/ );

//The options (second parameter) are all optional. The values shown are the default values.
skrollr.menu.init(s, {
  //skrollr will smoothly animate to the new position using `animateTo`.
  animate: true,

  //The easing function to use.
  easing: 'sqrt',

  //How long the animation should take in ms.
  duration: function(currentTop, targetTop) {
    //By default, the duration is hardcoded at 500ms.
    return 1000;

    //But you could calculate a value based on the current scroll position (`currentTop`) and the target scroll position (`targetTop`).
    //return Math.abs(currentTop - targetTop) * 10;
  },
});

$(".icon-bookmark").click(function() {
  $("#placemark").addClass("placemarked");
  $(".icon-bookmark").addClass("pressed");
});

@charset "UTF-8";
@import url("https://fonts.googleapis.com/css?family=Signika");
@import url("https://api.tiles.mapbox.com/mapbox.js/v1.3.1/mapbox.css");
@import url("https://netdna.bootstrapcdn.com/font-awesome/3.2.1/css/font-awesome.css");

html {
  font-family: 'Signika', sans-serif;
}

body {
  background: #DDD7D1;
}

#map {
  position: absolute;
  top: 0px;
  bottom: 0;
  width: 100%;
  height: 2000px;
  background-image: url("https://s3-us-west-2.amazonaws.com/s.cdpn.io/52524/NewYork2_bg.png");
}

.notPlacemarked {
  visibility: hidden;
}

.placemarked {
  visibility: visible;
  height: 55px;
  width: 55px;
  position: relative;
  top: 110px;
  margin-left: 40%;
  z-index: 100;
  transition: width 1s, height 1s, transform 1s;
  -webkit-transition: width 1s, height 1s, -webkit-transform 1s;
}

.container {
  background: #00C993;
  position: absolute;
  display: block;
  width: 100%;
  height: 2050px;
  color: white;
  text-align: center;
  min-width: 24px;
}

.section {
  position: absolute;
  display: block;
  width: 100%;
  color: white;
  text-align: left;
}

#sect1 {
  top: 400px;
}

#sect2 {
  top: 1000px;
}

#sect3 {
  top: 1500px;
}

#footer {
  top: 2000px;
  height: 50px;
  text-align: center;
}

#twitter {
  float: left;
  width: 20%;
  font-size: 5em;
  padding-left: 15%;
}

#rocket {
  float: right;
  width: 20%;
  font-size: 5em;
  padding-left: 15%;
}

#hiddenIcon {
  text-align: center;
  visibility: hidden;
  height: 0;
  font-size: 5em;
}

.anchor {
  height: 100px;
}

band2 h2 {
  text-align: left;
}

.explanation {
  min-width: 12.42em;
  float: left;
  width: 40%;
}

.explanation-right {
  min-width: 12.42em;
  float: left;
  text-align: right;
  padding-left: 5%;
  width: 40%;
}

#phone {
  background: #DDD7D1;
  border-radius: 30px;
  box-shadow: 0 0.5em 0 #BCB1A5;
  padding: 50px 18px 50px 18px;
  width: 20%;
  min-width: 200px;
  max-width: 400px;
  margin-right: 5%;
  float: left;
}

#screen {
  background: #ffffff;
  height: 300px;
  overflow: hidden;
  padding: 0;
  position: relative;
  min-width: 200px;
}

#topBar {
  background: #00C993;
  height: 10%;
  overflow: hidden;
  padding-left: 10px;
  padding-right: 10px;
  position: relative;
  min-width: 100px;
}

#mc_embed_signup {
  text-align: right;
  background-color: #00C993;
}

#mce-EMAIL {
  text-align: right;
  width: auto;
  height: 30px;
  margin-bottom: 20px;
  padding-right: 1em;
  border-style: none;
  outline: none;
}

#mce-EMAIL:focus {
  outline: none;
}

#mc-embedded-subscribe {
  border-style: none;
}

.icon-bookmark {
  float: right;
}

.icon-bookmark:hover {
  color: #FFC52F;
}

.pressed {
  color: #FFC52F;
}

h1,
h3 {
  font-family: 'Signika', sans-serif;
  font-weight: 700;
  text-align: center;
}

.container h1 {
  font-size: 5em;
  line-height: 1em;
  /*margin-bottom: 1em;*/
}

a {
  color: white;
}

.button {
  background: #DDD7D1;
  text-align: center;
  padding: .5em 1em;
  color: white;
  font-weight: bold;
  text-decoration: none;
  box-shadow: 0 0.2em 0 #BCB1A5;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  /*transition cross-browser stuff*/
  -webkit-transition: background 0.2s ease-out;
  /* Safari 3.2+, Chrome */
  -moz-transition: background 0.2s ease-out;
  /* Firefox 4-15 */
  -o-transition: background 0.2s ease-out;
  /* Opera 10.5–12.00 */
  transition: background 0.2s ease-out;
  /* Firefox 16+, Opera 12.50+ */
}

.button:hover {
  background: #BCB1A5;
}

a.arrow {
  color: white;
  text-align: center;
  font-size: 3em;
  text-decoration: none;
  padding-bottom: 30px;
  /*transition cross-browser stuff*/
  -webkit-transition: color 0.2s ease-out;
  /* Safari 3.2+, Chrome */
  -moz-transition: color 0.2s ease-out;
  /* Firefox 4-15 */
  -o-transition: color 0.2s ease-out;
  /* Opera 10.5–12.00 */
  transition: color 0.2s ease-out;
  /* Firefox 16+, Opera 12.50+ */
}

a.arrow:hover {
  color: #FFC52F;
}

@media only screen and (min-width: 767px) {
  body {
    font-size: 1.125em;  /* 18px / 16px */
  }
  
  .container {
    background-size: 100%;
  }
  
  .container h1 {
    font-size: 3.25em;  /* 52 / 16 */
  }
  
  a.button {
    padding: .75em 1.5em;
  }
}

@media only screen and (max-width: 600px) {
  .explanation {
    float: none;
    margin: auto;
    text-align: center;
  }
  
  .explanation-right {
    float: none;
    margin: center;
    text-align: center;
  }
  
  #sect1 {
    top: 350px;
  }
  
  #phone {
    visibility: hidden;
    height: 0px;
    width: 0px;
    padding: 0;
    margin: 0;
  }
  
  #map {
    width: 0px;
    height: 0px;
  }
  
  #sect2 {
    top: 900px;
  }
  
  #rocket {
    visibility: hidden;
  }
  
  #twitter {
    visibility: hidden;
    padding-left: 0em;
  }
  
  #hiddenIcon {
    visibility: visible;
    height: auto;
  }
  
  #mce-EMAIL {
    text-align: center;
    padding: 0;
    float: none;
  }
  
  #mc_embed_signup {
    text-align: center;
  }
}

<script src="https://cdnjs.cloudflare.com/ajax/libs/modernizr/2.8.3/modernizr.min.js" type="text/javascript"></script>
<script src="https://api.tiles.mapbox.com/mapbox.js/v1.3.1/mapbox.js"></script>
<script src='http://cdnjs.cloudflare.com/ajax/libs/jquery/2.1.3/jquery.min.js'></script>
<script src='http://cdnjs.cloudflare.com/ajax/libs/skrollr/0.6.11/skrollr.min.js'></script>
<link rel="stylesheet" href="https://cdnjs.cloudflare.com/ajax/libs/normalize/5.0.0/normalize.min.css">

<div class="container" id="skrollr-body" data-0="background-color:rgb(0,201,147);" data-400="background-color:rgb(74,173,255);" data-1000="background-color:rgb(74,173,255);" data-1300="background-color:rgb(0,201,147);">
  <h1><i class="icon-circle-blank"></i></h1>
  <h2>PoshFit</h2>
  <p> it's coming to your smartphone </p>

  <a class="arrow" href="#anchor1"><i class="icon-sort-down"></i></a>

  <div class="section" id="sect1">
    <div class="anchor" id="anchor1"></div>
    <div id="hiddenIcon">
      <i class="icon-mobile-phone"></i>
    </div>
    <div id="phone" data-0="margin-left: -20%; opacity:0" data-350="margin-left: 10%; opacity:1">

      <div id="topBar">
        <p>Press---> <i class="icon-bookmark"></i> </p>
      </div>
      <div id="screen">
        <div id="map">
          <img id="placemark" class="notPlacemarked" src="https://s.cdpn.io/52524/CircleMarkerTest3.png">
        </div>
        <!--/ map-->
      </div>
      <!--/ screen-->
    </div>
    <!--/ phone-->
    <div class="explanation" data-300="opacity: 0" data-350="opacity: 1">
      <h2>Right where you are</h2>
      <p>Try on clothes from home. There's no need to travel all the way to the store to find the perfect outfit.</p>
      <a class="arrow" href="#anchor2"><i class="icon-sort-down"></i></a>
    </div>
    <!--/ explanation-->
  </div>
  <!--/ sect1-->

  <div class="section" id="sect2">
    <div class="anchor" id="anchor2"></div>
    <div id="hiddenIcon">
      <i class="icon-twitter"></i>
    </div>
    <div id="twitter" data-600="margin-top: -20%; opacity: 0" data-1000="margin-top: 0; opacity:1">
      <i class="icon-twitter"></i>
    </div>
    <div class="explanation" data-850=" opacity: 0" data-900=" opacity:1">
      <h2>Follow @PoshFit on Twitter</h2>
      <p>Keep up with the latest updates from PoshFit. </p>
      <a class="arrow" href="#anchor3"><i class="icon-sort-down"></i></a>
    </div>
    <!--/ explanation-->
  </div>
  <!--sect2-->

  <div class="section" id="sect3">
    <div class="anchor" id="anchor3"></div>
    <div id="hiddenIcon">
      <i class="icon-rocket icon-rotate-180"></i>
      <p></p>
    </div>
    <div class="explanation-right" data-1350=" opacity: 0" data-1400=" opacity:1">
      <h2>It's almost here!</h2>
      <p>Leave your email address for our beta newsletter.</p>

      <!-- Begin MailChimp Signup Form -->

      <div id="mc_embed_signup">
        <form action="">
          <!-- currently empty -->
          <input type="email" value="" name="EMAIL" class="email" id="mce-EMAIL" placeholder="me@example.com" onfocus="this.placeholder = ''" onblur="this.placeholder = 'me@example.com'" required>
          <div><input type="submit" value="I want it!" name="subscribe" id="mc-embedded-subscribe" class="button"></div>
        </form>
      </div>

      <!--End mc_embed_signup-->
    </div>
    <!--/ explanation-->
    <div id="rocket" data-1100="margin-top:-300px; margin-right:0%; opacity: 0" data-1400="margin-top:50; margin-right:20%; opacity:1">
      <i class="icon-rocket icon-rotate-180"></i>
    </div>
    <!--/ rocket-->
  </div>
  <!--sect2-->
  <div class="section" id="footer">
    <p><a href="https://twitter.com/PoshFit">@PoshFit</a></p>
  </div>
</div>
<!--/ band-->