qq_兜里有米_04383258
2017-06-05 23:23
<!doctype html> <html> <head> <meta charset="utf-8"> <title>无标题文档</title> <style type="text/css"> @charset "utf-8"; /* CSS Document */ body{ background:#F4F4F4; } .nav-menu{ display:block; width:950px; background:#74adaa; margin:50px auto 150px; } .nav-menu>li{ display:inline;/*使li的点消失*/ float:left; border-right:1px solid #94c0be; } .nav-menu>li:last-child{ border-right:none; } .nav-menu li a{ display:block; padding:15px 30px 15px 31px; color:#fff; text-decoration:none; font-size:20px; line-height:20px; text-transform:capitalize; overflow: visible;/*?????????*/ } /*搭建3d布景*/ .three-d{ -webkit-perspective:200px; perspective:200px; -webkit-transition:all 0.07s linear; transition:all 0.07s linear; position:relative; } .three-d:not(.active):hover { cursor: pointer; } .three-d:not(.active):hover .three-d-box, .three-d:not(.active):focus .three-d-box { -webkit-transform: translateZ(-25px) rotateX(90deg); transform: translateZ(-25px) rotateX(90deg); } .three-d-box{ position:absolute; top:0; left:0; display:block; width:100%; height:100%; -webkit-transform:translatez(-25px); transform:translatez(-25px); -webkit-transform-style:preserve-3d;/*!!!!!!!*/ transform-style:preserve-3d; -webkit-transition: all .3s ease-out;/*!!!!!!!*/ transition: all .3s ease-out; } .front{ -webkit-transform:rotatex(0deg) translatez(25px); transform:rotatex(0deg) translatez(25px); } .back{ -webkit-transform:rotatex(-90deg) translatez(25px); transform:rotatex(-90deg) translatez(25px); } .front,.back{ position:absolute; top:0; left:0; padding: 15px 30px 15px 31px; width: 100%; height: 100%; display: block; box-sizing: border-box; background: #74adaa;/*!!!!!!!!!!*/ } .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; } .nav-menu ul{ position:absolute; width:150px; background:#74adaa;/*......*/ font-size:14px; padding:0; -webkit-transform: rotateX(-90deg); transform: rotateX(-90deg); -webkit-transform-origin: 0px 0px; transform-origin: 0px 0px; } .nav-menu > li:hover ul { display: block; -webkit-transform: rotateX(0deg); transform: rotateX(0deg); } .clearfix{ overflow:hidden } </style> </head> <body> <div class="nav"> <ul class="nav-menu unstyle"> <li> <a class="three-d active" href="#">home <span class="three-d-box"> <span class="front">home</span> <span class="back">home</span> </span> </a> </li> <li> <a class="three-d" href="#">services <span class="three-d-box"> <span class="front">services</span> <span class="back">services</span> </span> </a> </li> <li> <a class="three-d" href="#">products <span class="three-d-box"> <span class="front">products</span> <span class="back">products</span> </span> </a> </li> <li> <a class="three-d" href="#">about <span class="three-d-box"> <span class="front">about</span> <span class="back">about</span> </span> </a> </li> <li> <a class="three-d" href="#">contact <span class="three-d-box"> <span class="front">contact</span> <span class="back">contact</span> </span> </a> </li> <li> <a class="three-d" href="#">blog <span class="three-d-box"> <span class="front">blog</span> <span class="back">blog</span> </span> </a> <ul class="drop-menu clearfix unstyle"> <li><a class="three-d" href="#">html5 <span class="three-d-box"> <span class="front">html5</span> <span class="back">html5</span> </span> </a></li> <li><a class="three-d" href="#">css3 <span class="three-d-box"> <span class="front">css3</span> <span class="back">css3</span> </span> </a></li> <li><a class="three-d" href="#">javascript <span class="three-d-box"> <span class="front">javascript</span> <span class="back">javascript</span> </span> </a></li> <li><a class="three-d" href="#">videogames <span class="three-d-box"> <span class="front">videogames</span> <span class="back">videogames</span> </span> </a></li> </ul> </li> <li> <a class="three-d" href="#">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>
在这个代码中最外围的ul里的li的点是设置了display:inline使点消失的(其实这里也不明白为什么设置inline会使点消失)。
外围的ul中blog项里面也包含一个ul。这个ul里的li的点我是在最后面加了一个overflow:hidden才使点消失的。问题是我不明白什么原理,为什么会这样?
我的问题就是,上述是什么原理为什么会这样?
ps:至于为什么不用list-style-type, 我发现使用list-style-type的效果只是使点消失但是还占据原来的位置,效果达不到居中。list-style-type效果就好像visibility:hidden一样(visibility:hidden使元素隐藏,还占据空间;display:none使元素隐藏,并且不占据原来的空间)。
起作用的是它吧
ul, li {
list-style: none outside none;
}
十天精通CSS3
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