看别人做的一个3D导航栏，觉得很厉害，这里先保存下来，后面有时间好好分析一下：
<!doctype html> <html lang="en"> <head> <meta charset="UTF-8"> <title>制作3D旋转导航</title> <style> @import url("http://www.w3cplus.com/demo/css3/base.css"); /*任务一：引入本地字体文件*/ @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; /*调用本地字体*/ 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 { /* 任务三、设置3D舞台布景 */ perspective:200px; /*任务三 设置a元素.three-d为距离200px的3D舞台 perspective理论是用户通过屏幕看到3D元素的距离，以像素px为单位 */ /*任务四、设置3D舞台布景过渡效果*/ transition:all 0.3s linear; /*这里没有发现实际作用，望指出*/ position: relative; } .three-d:not(.active):hover { cursor: pointer; } /*任务五、给不是当前状态的3D舞台的悬浮与聚焦状态设置变形效果*/ .three-d:not(.active):hover .three-d-box, .three-d:not(.active):focus .three-d-box { transform:translateZ(-25px) rotateX(90deg); /* translateZ改变3D元素的Z轴高度，以用户看屏幕为准 X是左右，Y是上下，Z可以理解为自身的深度,对于用户就是前后(屏幕距离) 如果3D元素X轴旋转90度后，Z轴以用户看屏幕就变成了上下, X轴依旧是左右,Y轴变成了前后(屏幕距离)。 这里没图说不清楚，看个人理解吧 这里再次设置translateZ(-25px)是因为获取焦点后 不会保留原本的translateZ数值 rotateX改变3D元素的X轴角度,比如把这个元素横着插一根牙签，然后旋转 (怎么转自己想，难道还能左右转) */ } .three-d-box { /*任务六、给3D舞台中“.three-d-box”设置过渡与变形效果*/ transition:all 0.3s linear; transform:translateZ(-25px); /*这里先设置translateZ(-25px)是为了子元素旋转效果需求， 不然会造成拉近屏幕(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; /*规定如何在3D空间呈现子元素,(是否3D视图)*/ -webkit-pointer-events: none; -moz-pointer-events: none; -ms-pointer-events: none; -o-pointer-events: none; pointer-events: none; /*pointer-events设置元素对于鼠标事件的限制*/ position: absolute; top: 0; left: 0; display: block; width: 100%; height: 100%; } /*任务七、给导航设置3D前，与3D后变形效果*/ .front {/*这个是未获取焦点时显示的那一面(正面)*/ transform:rotateX(0deg) translateZ(25px); /*设置正面X轴不旋转(默认不转可以不设置) translateZ(25px)拉近正面深度距离，目的是不与背面重合 */ } .back {/*这个是获取焦点旋转后的那一面(底下货值背面)*/ transform:rotateX(-90deg) translateZ(25px); /*设置背面X轴旋转-90度， translateZ(25px)因为已经旋转了，所以Z轴变成了上下， 因为旋转的是-90 ， 反向，所以Z轴25px是向下， 设置Z轴是为了和正面的底边接触，而不是正面的中点(一横) */ 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; } /*任务八、设置导航当前状态与悬浮状态下的背景效果*/ .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); /*只是改变背景，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); /*这里-90deg是先把下拉旋转90度，形成隐藏的假象*/ -webkit-backface-visibility: hidden; -moz-backface-visibility: hidden; -ms-backface-visibility: hidden; -o-backface-visibility: hidden; backface-visibility: hidden; } /*任务九、显示下拉导航菜单，并其设置一个变形效果*/ .nav-menu > li:hover ul { display: block; transform:rotateX(0deg); /*获取焦点将下拉旋转回正面*/ } </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：
