当鼠标悬停在导航悬停按钮上时，它们没有完全着色。我尝试将宽度更改为 100%，我认为这可以解决它，但它没有。我试图寻找一些类似的问题和解决方案，但是我找到的所有解决方案都没有解决问题，所以我决定亲自询问。想法？
HTML：
<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8" />
<title>Sunny Acres</title>
<script src="modernizr-1.5.js"></script>
<link href="sa_layout.css" rel="stylesheet" type="text/css" />
<link href="sa_styles.css" rel="stylesheet" type="text/css" />
<style type="text/css">
section > p:first-of-type:first-line {
text-transform: uppercase;
}
section > p:first-of-type:first-letter {
font-size:250% font-family:'Times New Roman', Times, serif;
}
</style>
</head>
<body>
<header>
<h1>
<img src="salogo.png" alt="Sunny Acres" />
</h1>
</header>
<nav>
<ul>
<li><a href="home.htm">Home</a>
</li>
<li><a href="maze.htm">Autumn Fun</a>
</li>
<li><a href="haunted.htm">Scary Good</a>
</li>
<li><a href="petting.htm">Meet the Animals</a>
</li>
<li><a href="produce.htm">For your Tastebuds</a>
</li>
</ul>
</nav>
<section>
<header>
<h1>Welcome</h1>
</header>
<img src="photo1.jpg" alt="home page photo" id="promoimage" />
<p id="firstp">There's always something happening at Sunny Acres. With the coming of fall, we're gearing up for our big AutumnFest and Farm Show. If you haven't visited our famous <a href="maze.htm">Corn Maze</a>, be sure to do so before it gets torn down on November 5. This year's maze is bigger and better than ever.</p>
<p>Farms can be educational and Sunny Acres is no exception. Schools and home-schooling parents, spend an afternoon with us at our <a href="petting.htm">Petting Barn</a>. We have over 100 friendly farm animals in a clean environment. Kids can bottle feed the baby goats, lambs, and calves while they learn about nature and the farming life. Please call ahead for large school groups.</p>
<p>When the sun goes down this time of year, we're all looking for a good fright. Sunny Acres provides that too with another year of the <a href="haunted.htm">Haunted Maze</a>. Please plan on joining us during weekends in October or on Halloween for our big Halloween Festival.</p>
<p>Of course, Sunny Acres is, above all, a <em>farm</em>. Our <a href="produce.htm">Farm Shop</a> is always open with reasonable prices on great produce. Save even more money by picking your own fruits and vegetables from our orchards and gardens.</p>
<p class="closing">We all hope to see you soon, down on the farm.
<br />— Tammy & Brent Nielsen</p>
<h2>Hours</h2>
<ul>
<li>Farm Shop: 9 am - 5 pm Mon - Fri; 9 am - 3 pm Sat</li>
<li>The Corn Maze: 11 am - 9 pm Sat; 11 am - 5 pm Sun</li>
<li>The Haunted Maze: 5 pm - 9 pm Fri & Sat</li>
<li>Petting Barn: 9 am - 4 pm Mon - Fri; 11 am - 3 pm Sat & Sun</li>
</ul>
<h2>Directions</h2>
<ul>
<li>From Council Bluffs, proceed east on I-80</li>
<li>Take Exit 38 North to the Drake Frontage Road</li>
<li>Turn right on Highway G</li>
<li>Proceed east for 2.5 miles</li>
<li>Sunny Acres is on your left; watch for the green sign</li>
</ul>
</section>
<footer> <address>
Sunny Acres ☀
Tammy & Brent Nielsen ☀
1977 Highway G ☀
Council Bluffs, IA 51503
</address>
</footer>
</body>
</html>
CSS：
@font-face {
font-family: 'NobileRegular';
src: url('nobile-webfont.eot');
src: local('☺'),
url('nobile-webfont.woff') format('woff'),
url('nobile-webfont.ttf') format('truetype'),
url('nobile-webfont.svg#webfontsKo9tqe9') format('svg');
}
/* body styles */
body {
background-color: white;
font-family: NobileRegular, Verdana, Geneva, sans-serif;
line-height: 1.4em;
}
/*heading styles */
section h1 {
background-color: rgb(125, 186, 240);
color: white;
font-size: 1.7em;
letter-spacing: 0.4em;
text-indent: 1em;
line-height: 1.8em;
}
h2{
background-color: rgb(0,154,0);
color: white;
color : rgba(255, 255, 255, 0.8);
letter-spacing: 0.4em;
text-indent: 1em;
line-height: 1.8em;
}
/* navigation styles */
nav ul {
list-style-type: none;
padding-left: 0.5em;
background-color: rgb(125,186,240);
line-height: 3.5em;
width:none;
float:none;
}
nav ul li a {
color: white;
text-decoration: none;
width:100%;
float:none;
}
nav ul li:hover {
background-color: rgb(83,142,213);
width:none;
float:none;
}
/*nav ul li:first-of-type {
text-transform: uppercase;
}
*/
/* section styles */
section p.closing {
color: rgb(0,165,0);
text-align: right;
}
section h2+ul {
list-style-image: url(arrow.png);
}
/* footer styles */
footer address {
background-color: rgb(55,102,55);
color: white;
color: rgba(255,255,255,0.8);
font: normal small-caps 0.8em/4em 'Times New Roman', Times, serif;
text-align: center;
}