html - CSS3 和导航栏

Question

我正在尝试创建一个包含 this style 的导航栏使用下拉菜单样式，我的菜单如下所示

<nav>
            <ul>
                <li> <a href="/index.php">Home</a></li>
                <li><a href="/kbi/articles/articles.php">Articles</a>
                    <ul>
                        <li><a href="/kbi/articles/new/new.php">News & Updates</a></li>
                        <li><a href="/kbi/articles/reviews/reviews.php">Reviews</a></li>
                        <li><a href="/kbi/articles/toppicks/toppicks.php">Top Picks</a></li>
                        <li><a href="/kbi/articles/vault/thevault.php">Vault</a></li>
                        <li><a href="/kbi/articles/myrig.php">My Rig</a></li>
                    </ul>
                </li>
                <li><a href="kbi/devices/devices.php">Devices</a>
                    <ul>
                        <li><a href="/kbi/devices/android/android.php">Android</a></li>
                        <li><a href="/kbi/devices/ios/ios.php">IOS</a></li>
                        <li><a href="/kbi/devices/windows/windows.php">Windows</a></li>
                        <li><a href="/kbi/devices/osx/osx.php">OSX</a></li>
                        <li><a href="/kbi/devices/linux/linux.php">Linux</a></li>
                    </ul>
                </li>
                <li><a href="/kbi/about/about.php">About</a>
                    <ul>
                        <li><a href="/kbi/about/contact/contact.php">Contact</a></li>
                        <ul>
                            <a href="/kbi/articles/myrig.php">My Rig</a>
                        </ul>
                    </ul>
                </li>
            </ul>
        </nav>

还有我的 CSS 来配合它

nav ul ul {
display: none;
}

nav ul li:hover > ul {
    display: block;
}
nav ul {
background: #efefef; 
background: linear-gradient(top, #efefef 0%, #bbbbbb 100%);  
background: -moz-linear-gradient(top, #efefef 0%, #bbbbbb 100%); 
background: -webkit-linear-gradient(top, #efefef 0%,#bbbbbb 100%); 
box-shadow: 0px 0px 9px rgba(0,0,0,0.15);
padding: 0 20px;
border-radius: 10px;  
list-style: none;
position: relative;
display: inline-table;
}
nav ul:after {
    content: ""; clear: both; display: block;
}
nav ul li {
float: left;
}
nav ul li:hover {
    background: #4b545f;
    background: linear-gradient(top, #4f5964 0%, #5f6975 40%);
    background: -moz-linear-gradient(top, #4f5964 0%, #5f6975 40%);
    background: -webkit-linear-gradient(top, #4f5964 0%,#5f6975 40%);
}
    nav ul li:hover a {
        color: #fff;
    }

nav ul li a {
    display: block; padding: 25px 40px;
    color: #757575; text-decoration: none;
}
nav ul ul {
background: #5f6975; border-radius: 0px; padding: 0;
position: absolute; top: 100%;
}
nav ul ul li {
    float: none; 
    border-top: 1px solid #6b727c;
    border-bottom: 1px solid #575f6a;
    position: relative;
}
    nav ul ul li a {
        padding: 15px 40px;
        color: #fff;
    }   
        nav ul ul li a:hover {
            background: #4b545f;
        }
nav ul ul ul {
position: absolute; left: 100%; top:0;
}

但它没有跨越页面的整个长度，我可以做些什么不同的事情？

Answer 1

根据您的样式，nav ul元素是display: inline-table，因此它需要所需的水平空间。使其 block 级元素跨越整个宽度:

nav ul {
    background: #efefef;
    background: linear-gradient(top, #efefef 0%, #bbbbbb 100%);
    background: -moz-linear-gradient(top, #efefef 0%, #bbbbbb 100%);
    background: -webkit-linear-gradient(top, #efefef 0%, #bbbbbb 100%);
    box-shadow: 0px 0px 9px rgba(0, 0, 0, 0.15);
    padding: 0 20px;
    border-radius: 10px;
    list-style: none;
    position: relative;
    display: block; /* make it block */
}

演示: http://jsfiddle.net/e0ar7urh/1/