前端开发练习：淘宝焦点图

效果图如下：

代码如下：

<!DOCTYPE html>
<html lang="en">

<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>淘宝焦点图</title>
    <style>
        * {
            margin: 0;
            padding: 0;
        }

        .tb-promo {
            position: relative;
            height: 280px;
            width: 520px;
            margin: 100px auto;
        }

        .tb-promo img {
            height: 280px;
            width: 520px;
        }

        .prev,
        .next {
            position: absolute;
            top: 50%;
            margin-top: -15px;
            width: 20px;
            height: 30px;
            background: rgba(0, 0, 0, 0.3);
            text-decoration: none;
            line-height: 30px;
            color: #fff;
        }

        .tb-promo .prev {
            left: 0;
            border-radius: 0 15px 15px 0;
        }

        .tb-promo .next {
            right: 0;
            text-align: right;
            border-radius: 15px 0 0 15px;
        }

        .promo-nav {
            position: absolute;
            bottom: 15px;
            left: 50%;
            margin-left: -35px;
            width: 70px;
            height: 14px;
            background: rgba(255, 255, 255, 0.3);
            border-radius: 7px;
        }

        .promo-nav li {
            width: 8px;
            height: 8px;
            background-color: #fff;
            list-style: none;
            float: left;
            border-radius: 50%;
            margin: 3px;
        }

        .promo-nav li:hover {
            background-color: #ff5000;
        }
    </style>
</head>

<body>
    <div class="tb-promo">
        <img src="images/tb.jpg" alt="">
        <!-- 左侧按钮箭头 -->
        <!-- &lt;是小于号 -->
        <a href="#" class="prev">&lt;</a>
        <!-- 右侧按钮箭头 -->
        <!-- &gt;是大于号 -->
        <a href="#" class="next">&gt;</a>
        <!-- 小圆点 -->
        <ul class="promo-nav">
            <li></li>
            <li></li>
            <li></li>
            <li></li>
            <li></li>
        </ul>
    </div>
</body>

</html>