效果图如上
综合定位以及圆角圆点的知识，考验板块在图片中的居中（图源网络）
代码如下：
HTML文件
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta http-equiv="X-UA-Compatible" content="IE=edge">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<title>Document</title>
<link rel="stylesheet" href="style1.css">
</head>
<body>
<div class="tb-promo">
<img src="windy.jpg" alt="">
<a href="#" class="prev"><</a>
<a href="#" class="next">></a>
<ul>
<li class="selected"></li>
<li></li>
<li></li>
<li></li>
<li></li>
</ul>
</div>
</body>
</html>
CSS文件
*{
margin: 0;
padding: 0;
}
li{
list-style: none;
}
.tb-promo{
position: relative;
width: 520px;
height: 280px;
margin: 100px auto;
}
.tb-promo img{
width: 100%;
height: 100%;
}
.tb-promo a{
position: absolute;
top: 50%;
background-color: rgba(0,0,0,.7);
width: 20px;
height: 30px;
color: white;
line-height: 30px;
text-align: center;
text-decoration: none;
}
.tb-promo .prev{
left: 0;
border-top-right-radius:15px;
border-bottom-right-radius:15px;
}
.tb-promo .next{
right: 0;
border-top-left-radius:15px;
border-bottom-left-radius:15px;
}
.tb-promo ul{
position: absolute;
width: 70px;
height: 13px;
left: 50%;
bottom: 0;
margin-left:-35px;
margin-bottom: 10px;
background-color: rgba(255,255,255,.3);
border-radius: 15px;
}
.tb-promo ul li{
float: left;
width: 8px;
height: 8px;
background-color: #fff;
border-radius: 4px;
margin: 3px;
}
.tb-promo ul .selected{
background-color: #ff5000;
}
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