修改swiper的指示器样式

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

<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <link rel="stylesheet" href="https://unpkg.com/swiper/swiper-bundle.css">
    <link rel="stylesheet" href="https://unpkg.com/swiper/swiper-bundle.min.css">
    <script src="https://unpkg.com/swiper/swiper-bundle.js"> </script>
    <script src="https://unpkg.com/swiper/swiper-bundle.min.js"> </script>
    <style>
        .swiper-container {
            width: 600px;
            height: 300px;
        }

        .swiper-slide {
            display: flex;
            justify-content: center;
            align-items: center;
        }

        .swiper-pagination-bullet {
            transition-duration: 300ms;
        }

        .swiper-pagination-bullet-active {
            width: 20px;
            border-radius: 4px;
        }

        .swiper-pagination {
            display: flex;
            justify-content: flex-end;
            align-items: center;
        }
    </style>
    <title>Document</title>
</head>

<body>
    <div class="swiper-container">
        <div class="swiper-wrapper">
            <div class="swiper-slide">Slide 1</div>
            <div class="swiper-slide">Slide 2</div>
            <div class="swiper-slide">Slide 3</div>
            <div class="swiper-slide">Slide 4</div>
            <div class="swiper-slide">Slide 5</div>
        </div>
        <!-- 如果需要分页器 -->
        <div class="swiper-pagination"></div>

        <!-- 如果需要导航按钮 -->
        <div class="swiper-button-prev"></div>
        <div class="swiper-button-next"></div>
    </div>
</body>
<script>
    var mySwiper = new Swiper('.swiper-container', {
        loop: true,
        pagination: {
            el: '.swiper-pagination',
        },

        navigation: {
            nextEl: '.swiper-button-next',
            prevEl: '.swiper-button-prev',
        },

        scrollbar: {
            el: '.swiper-scrollbar',
        },
    });
</script>

</html>