<!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>css实现边框跑马灯效果</title>
    <style>
      .box {
        height: 300px;
        width: 400px;
        box-shadow: 0 0 3px orange;
        text-align: center;
        line-height: 280px;
      }

      .horse_run {
        background-image: linear-gradient(
            90deg,
  