Illustration of the problem as shown in Chrome:

Expected Behavior and FF:

We create the Hybrid Orange page , but the top of the add-on does not affect the height of the Tecnología div in Chrome. I want the div to be 100% tall, so the first scroll of the px is the next section. I'm not sure what makes this behavior different in FF and Chrome.
Relevant part of HTML:
<nav>
<header id = "bar">
[...]
</header>
<ul>
[...]
</ul>
</nav>
<div id = "inicio">
[...]
</div>
<div id = "tecnologia">
<div class = "v_center">
<div class="container clearfix">
<div id="tecno-web" class="tecno-div">
[...]
</div>
</div>
</div>
</div>
Relevant part of css:
nav {
position: absolute;
top: 60%;
z-index: 100;
width: 80%;
height: 4em;
padding: 0 10%;
-webkit-backface-visibility: hidden;
background-color: #FFF;
box-shadow: 0 2px 8px -1px gray
}
#tecnologia {
display: table;
position: relative;
width: 100%;
padding-top: 4em;
height: calc(100% - 4em);
background-color:#68a4dc;
background-image: url('/images/fondo_azul.jpg');
color:#ffffff;
}
: tecnologia 100%, (100% - 4em) + . , Chrome , , Tecnología. , Firefox. height: 100%;, Chrome, Firefox ( ), + .