基于Jquery实现焦点图淡出淡入效果_jquery

@charset "utf-8";
/* 简单reset */
body, p, ul, ol, li {
 margin: 0;
 padding: 0;
}
ul, ol {
 list-style: none;
}
img { border:none; }
a,button{ outline: none; }
.clearfix:after {
 visibility: hidden;
 display: block;
 font-size: 0;
 content: " ";
 clear: both;
 height: 0;
} 
/* 具体样式 */
.banner { height: 400px; }
.banner .bannerCon {
 position: relative;
 width: 60%;
 height: 100%;
 margin: 0 auto;
 overflow: hidden;
}
.bannerCon .imgList {
 width: 100%;
 height: 100%;
}
.bannerCon .imgList li {
 display: none;
 position: absolute;
 top: 0;
 left: 0;
 width: 100%;
 height: 100%;
 background-color: #e2f6fd; /* 这个背景是为了展示宽度大于图片宽度时的区域，可以删除 */
 z-index: 1;
}
.bannerCon .imgList li a {
 display: block;
 height: 100%;
 text-align: center;
}
.imgList li a img {
 position: absolute;
 top: 0;
 left: 50%;
 margin-left: -400px; /* 这个数值填图片的实际宽度的一半 */
}
.bannerCon .pre-nex {
 display: none;
 position: absolute;
 top: 50%;
 width: 40px;
 height: 60px;
 margin-top: -40px;
 font: bold 40px/60px Simsun;
 color: #ccc;
 text-align: center;
 border:none;
 background: rgba(0,0,0,.30);
 filter:progid:DXImageTransform.Microsoft.Gradient(startColorStr=#4c000000, endColorStr=#4c000000);
 cursor: pointer;
 z-index: 3;
}
.bannerCon .pre-nex.show { display: inline-block; }
.bannerCon .prev { left: 13%; }
.bannerCon .next { right: 13%; }
.bannerCon .btnList {
 position: absolute;
 left: 0;
 bottom: 20px;
 width: 100%;
 height: 12px;
 text-align:center;
 z-index: 6;
 _overflow: hidden;
}
.bannerCon .btnList li { display: inline; }
.bannerCon .btnList li span {
 display: inline-block;
 width: 12px;
 height: 12px;
 margin: 0 5px;
 border-radius: 6px;
 background-color:#14829e;
 cursor: pointer;
}
.bannerCon .btnList li.cur span { background-color: #f30; }