css3鼠标悬停动画效果

效果图:
这里写图片描述
这里写图片描述
鼠标悬停的时候三角向左变大直到彻底覆盖,文字缓慢显示。用CSS3完成整个效果,主要是三角形的写法
具体代码以下:css

<!DOCTYPE html>
<html>
<head>
    <meta charset="utf-8">
    <title>css3三角叠加效果</title>
    <link rel="stylesheet" type="text/css" href="main.css">
</head>
<body>
    <div class="content-item"> <div class="overlays"></div> <div class="info">Info</div> <div class="text"> <h3>标题</h3> <p>这是一段文字,这是一个三角叠加特效</p> </div> </div> <div class="content-item"> <div class="overlays"></div> <div class="info">Info</div> <div class="text"> <h3>标题</h3> <p>这是一段文字,这是一个三角叠加特效</p> </div> </div> <div class="content-item"> <div class="overlays"></div> <div class="info">Info</div> <div class="text"> <h3>标题</h3> <p>这是一段文字,这是一个三角叠加特效</p> </div> </div> <div class="content-item"> <div class="overlays"></div> <div class="info">Info</div> <div class="text"> <h3>标题</h3> <p>这是一段文字,这是一个三角叠加特效</p> </div> </div> </body> </html>
@charset "utf-8";
/* css Document*/
body,div,h3,p,h2{margin: 0;padding: 0;}
.content-item{
    position: relative;
    width: 300px;
    height: 200px;
    float: left;
    margin: 0 10px;
    background: url(images/4.jpg) no-repeat;
    overflow: hidden;
}
.text{
    position: absolute;
    padding: 3px;
    opacity: 0;
    left: 20px;
    top: 50px;
    transition: all 0.3s ease-out;
    -moz-transition: all 0.3s ease-out;
    -ms-transition: all 0.3s ease-out;
    -webkit-transition: all 0.3s ease-out;
    -o-transition: all 0.3s ease-out;
    color: white;
}
.text h3{
    border-bottom: 1px solid #333;
    padding-bottom: 12px;
}
.text p{
    line-height: 50px;
    font-weight: normal;
    font-family: "微软雅黑";
    font-size: 15px;
}
.info{
    position: absolute;
    right: 15px;
    bottom: 15px;
    color: #000;
    font-size: 12px;
    transition: all 0.5s ease-out;
    -moz-transition: all 0.5s ease-out;
    -ms-transition: all 0.5s ease-out;
    -webkit-transition: all 0.5s ease-out;
    -o-transition: all 0.5s ease-out;
}
.overlays{
    position: absolute;
    right: 0;
    bottom: 0;
    border-bottom: 100px solid rgba(0,0,0,0.8);
    border-left:100px solid rgba(0,0,0,0); 
    opacity: 0.8;
    transition: all 0.5s ease-out;
    -moz-transition: all 0.5s ease-out;
    -ms-transition: all 0.5s ease-out;
    -webkit-transition: all 0.5s ease-out;
    -o-transition: all 0.5s ease-out;
}

.content-item:hover .overlays{
    border-bottom: 600px solid rgba(0,0,0,0.8);
    border-left: 600px solid rgba(0,0,0,0);
}
.content-item:hover .info{
    opacity: 0;
}
.content-item:hover .text{
    opacity: 1;
    transition: all 0.5s ease-out 0.2s;
    -moz-transition: all 0.5s ease-out 0.2s;
    -ms-transition: all 0.5s ease-out 0.2s;
    -webkit-transition: all 0.5s ease-out 0.2s;
    -o-transition: all 0.5s ease-out 0.2s;
}

代码中图片的路径以及CSS的连接方式须要改动一下。html