CSS代码：
.box {
/* 可见视觉区域 */ width: 480px; height: 250px; position: relative; overflow: hidden; cursor: pointer; } .size { /* 广阔的海洋 */ width: 1000px; height: 1000px; position: absolute; left: 50%; top: 50%; margin: -500px 0 0 -500px; /* 水平居中 */ text-align: center; } .zoom { /* 缩放的元素 */ width: 480px; height: 250px; vertical-align: middle; -webkit-transition: -webkit-transform .2s; transition: transform .2s; } .box:hover .zoom { /* hover放大 */ -webkit-transform: scale(1.05); -ms-transform: scale(1.05); transform: scale(1.05); zoom: 1.05; } :root .box:hover .zoom { zoom: 1; } .middle { /* 垂直居中 */ display: inline-block; width: 0; height: 100%; vertical-align: middle; }
HTML代码：
<h4>左上角定位</h4> <div class="box"> <img src="20150213142143589.png" class="zoom"> </div> <h4>居中定位</h4> <div class="box"> <div class="size"> <img src="20150213142143589.png" class="zoom"><i class="middle"></i> </div> </div>
