CSS光束左右移动动画参考:http://datav.jiaminghi.com/guide/borderBox.htm


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

<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>

    <style>
        body {
            background: #282C34;
        }

        .box {
            width: 500px;
            height: 250px;
            border: 1px solid #235FA7;
            margin: 50px auto;
            position: relative;
        }

        .bar {
            width: 120px;
            height: 3px;
            border-radius: 3em;
            background: linear-gradient(to right, rgba(79, 209, 221, 0), rgba(79, 209, 221, 1));
            position: absolute;
            left: 0;
            bottom: 0;
            animation: slider 1s linear infinite;
        }

        @keyframes slider {
            0% {
                left: 0;
            }

            100% {
                left: calc(100% - 120px);
            }
        }

    </style>
</head>

<body>
    <div class="box">
        <div class="bar"></div>
    </div>
</body>

</html>

参考: datav.jiaminghi.com/guide/borde… 用css实现简单光束左右移动的动画，当然效果偏差有点大，有时间再继续完善 (ง •_•)ง