CSS3和導航欄

Question

我試圖創建一個具有this style的下拉菜單樣式導航欄，我有我的菜單，在這裏

<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> 

奠定了，我的CSS來與它一起去

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; 
} 

但它沒有跨越頁面的整個長度，我可以做什麼不同？

Answer 1

根據你的款式nav ul元素是display: inline-table，所以它需要儘可能多的水平空間根據需要。讓它block級元素跨越整個寬度：

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/