看別人做的一個3D導航欄，覺得很厲害，這里先保存下來，后面有時間好好分析一下：
<!doctype html> <html lang="en"> <head> <meta charset="UTF-8"> <title>制作3D旋轉導航</title> <style> @import url("http://www.w3cplus.com/demo/css3/base.css"); /*任務一：引入本地字體文件*/ @font-face{ font-family:"fontt"; src: url("http://www.imooc.com/Amaranth-BoldItalic.otf"); } body { background-color:#edecec; } /* basic menu styles */ .nav-menu { display: block; width:950px; margin: 50px auto 150px; } .nav-menu > li { display:inline; float:left; border-right:1px solid #edecec; } .nav-menu > li:last-child { border-right: none; } .nav-menu li a { color: #fff; display: block; text-decoration: none; /*調用本地字體*/ font-family:fontt; -webkit-font-smoothing: antialiased; -moz-font-smoothing: antialiased; font-smoothing: antialiased; text-transform: capitalize; overflow: visible; line-height: 20px; font-size: 20px; padding: 15px 30px 15px 31px; } .three-d { /* 任務三、設置3D舞台布景 */ perspective:200px; /*任務三 設置a元素.three-d為距離200px的3D舞台 perspective理論是用戶通過屏幕看到3D元素的距離，以像素px為單位 */ /*任務四、設置3D舞台布景過渡效果*/ transition:all 0.3s linear; /*這里沒有發現實際作用，望指出*/ position: relative; } .three-d:not(.active):hover { cursor: pointer; } /*任務五、給不是當前狀態的3D舞台的懸浮與聚焦狀態設置變形效果*/ .three-d:not(.active):hover .three-d-box, .three-d:not(.active):focus .three-d-box { transform:translateZ(-25px) rotateX(90deg); /* translateZ改變3D元素的Z軸高度，以用戶看屏幕為准 X是左右，Y是上下，Z可以理解為自身的深度,對於用戶就是前后(屏幕距離) 如果3D元素X軸旋轉90度后，Z軸以用戶看屏幕就變成了上下, X軸依舊是左右,Y軸變成了前后(屏幕距離)。 這里沒圖說不清楚，看個人理解吧 這里再次設置translateZ(-25px)是因為獲取焦點后 不會保留原本的translateZ數值 rotateX改變3D元素的X軸角度,比如把這個元素橫着插一根牙簽，然后旋轉 (怎么轉自己想，難道還能左右轉) */ } .three-d-box { /*任務六、給3D舞台中“.three-d-box”設置過渡與變形效果*/ transition:all 0.3s linear; transform:translateZ(-25px); /*這里先設置translateZ(-25px)是為了子元素旋轉效果需求， 不然會造成拉近屏幕(深度)25px */ -webkit-transform-style: preserve-3d; -moz-transform-style: preserve-3d; -ms-transform-style: preserve-3d; -o-transform-style: preserve-3d; transform-style: preserve-3d; /*規定如何在3D空間呈現子元素,(是否3D視圖)*/ -webkit-pointer-events: none; -moz-pointer-events: none; -ms-pointer-events: none; -o-pointer-events: none; pointer-events: none; /*pointer-events設置元素對於鼠標事件的限制*/ position: absolute; top: 0; left: 0; display: block; width: 100%; height: 100%; } /*任務七、給導航設置3D前，與3D后變形效果*/ .front {/*這個是未獲取焦點時顯示的那一面(正面)*/ transform:rotateX(0deg) translateZ(25px); /*設置正面X軸不旋轉(默認不轉可以不設置) translateZ(25px)拉近正面深度距離，目的是不與背面重合 */ } .back {/*這個是獲取焦點旋轉后的那一面(底下貨值背面)*/ transform:rotateX(-90deg) translateZ(25px); /*設置背面X軸旋轉-90度， translateZ(25px)因為已經旋轉了，所以Z軸變成了上下， 因為旋轉的是-90 ， 反向，所以Z軸25px是向下， 設置Z軸是為了和正面的底邊接觸，而不是正面的中點(一橫) */ color: #FFE7C4; } .front, .back { display: block; width: 100%; height: 100%; position: absolute; top: 0; left: 0; background: #74adaa; padding: 15px 30px 15px 31px; color: white; -webkit-pointer-events: none; -moz-pointer-events: none; -ms-pointer-events: none; -o-pointer-events: none; pointer-events: none; -webkit-box-sizing: border-box; box-sizing: border-box; } /*任務八、設置導航當前狀態與懸浮狀態下的背景效果*/ .nav-menu li .active .front, .nav-menu li .active .back, .nav-menu li a:hover .front, .nav-menu li a:hover .back { background-color: #51938f; background-size: 5px 5px; background-size: 5px 5px; background-position: 0 0, 30px 30px; background-image:linear-gradient(45deg, #478480 25%, transparent 25%, transparent 75%, #478480 75%, #478480),linear-gradient(45deg, #478480 25%, transparent 25%, transparent 75%, #478480 75%, #478480); /*只是改變背景，不重要*/ } .nav-menu ul { position: absolute; text-align: left; line-height: 40px; font-size: 14px; width: 200px; -webkit-transition: all 0.3s ease-in; -moz-transition: all 0.3s ease-in; -ms-transition: all 0.3s ease-in; -o-transition: all 0.3s ease-in; transition: all 0.3s ease-in; -webkit-transform-origin: 0px 0px; -moz-transform-origin: 0px 0px; -ms-transform-origin: 0px 0px; -o-transform-origin: 0px 0px; transform-origin: 0px 0px; -webkit-transform: rotateX(-90deg); -moz-transform: rotateX(-90deg); -ms-transform: rotateX(-90deg); -o-transform: rotateX(-90deg); transform: rotateX(-90deg); /*這里-90deg是先把下拉旋轉90度，形成隱藏的假象*/ -webkit-backface-visibility: hidden; -moz-backface-visibility: hidden; -ms-backface-visibility: hidden; -o-backface-visibility: hidden; backface-visibility: hidden; } /*任務九、顯示下拉導航菜單，並其設置一個變形效果*/ .nav-menu > li:hover ul { display: block; transform:rotateX(0deg); /*獲取焦點將下拉旋轉回正面*/ } </style> </head> <body> <div id="nav"> <ul class="nav-menu clearfix unstyled"> <li><a href="#" class="three-d active"> Home <span class="three-d-box"><span class="front">Home</span><span class="back">Home</span></span> </a></li> <li><a href="#" class="three-d"> Services <span class="three-d-box"><span class="front">Services</span><span class="back">Services</span></span></a> <ul class="clearfix unstyled drop-menu"> <li><a href="#" class="three-d"> Html5 <span class="three-d-box"><span class="front">Html5</span><span class="back">Html5</span></span> </a></li> <li><a href="#" class="three-d"> Css3 <span class="three-d-box"><span class="front">Css3</span><span class="back">Css3</span></span> </a></li> <li><a href="#" class="three-d"> JavaScript <span class="three-d-box"><span class="front">JavaScript</span><span class="back">JavaScript</span></span> </a></li> <li><a href="#" class="three-d"> Videogames <span class="three-d-box"><span class="front">Videogames</span><span class="back">Videogames</span></span> </a></li> </ul> </li> <li><a href="#" class="three-d"> Products <span class="three-d-box"><span class="front">Products</span><span class="back">Products</span></span> </a></li> <li><a href="#" class="three-d"> About <span class="three-d-box"><span class="front">About</span><span class="back">About</span></span> </a></li> <li><a href="#" class="three-d"> Contact <span class="three-d-box"><span class="front">Contact</span><span class="back">Contact</span></span></a> <ul class="clearfix unstyled drop-menu"> <li><a href="#" class="three-d"> Html5 <span class="three-d-box"><span class="front">Html5</span><span class="back">Html5</span></span> </a></li> <li><a href="#" class="three-d"> Css3 <span class="three-d-box"><span class="front">Css3</span><span class="back">Css3</span></span> </a></li> <li><a href="#" class="three-d"> JavaScript <span class="three-d-box"><span class="front">JavaScript</span><span class="back">JavaScript</span></span> </a></li> <li><a href="#" class="three-d"> Videogames <span class="three-d-box"><span class="front">Videogames</span><span class="back">Videogames</span></span> </a></li> </ul> </li> <li><a href="#" class="three-d"> Blog <span class="three-d-box"><span class="front">Blog</span><span class="back">Blog</span></span></a> <ul class="clearfix unstyled drop-menu"> <li><a href="#" class="three-d"> Html5 <span class="three-d-box"><span class="front">Html5</span><span class="back">Html5</span></span> </a></li> <li><a href="#" class="three-d"> Css3 <span class="three-d-box"><span class="front">Css3</span><span class="back">Css3</span></span> </a></li> <li><a href="#" class="three-d"> JavaScript <span class="three-d-box"><span class="front">JavaScript</span><span class="back">JavaScript</span></span> </a></li> <li><a href="#" class="three-d"> Videogames <span class="three-d-box"><span class="front">Videogames</span><span class="back">Videogames</span></span> </a></li> </ul> </li> <li><a href="#" class="three-d"> Shop On-line <span class="three-d-box"><span class="front">Shop On-line</span><span class="back">Shop On-line</span></span> </a></li> </ul> </div> </body> </html>
效果如下：
