<!DOCTYPE html>
<html lang="zh-CN">

<head>

  <meta charset="UTF-8">
  <meta name="viewport" content="width=device-width, initial-scale=1.0, user-scalable=no">

  <title>8 - LED时钟 (HTML+CSS+JS)</title>

  <link rel="stylesheet" href="./css/index.css">

</head>

<body>

  <!-- 父盒子 -->
  <div class="box">
    <!-- 每个数字元素，每个数字包含 7段 led灯 -->
    <div class="number">
      <span style="--ga-name:r1c2"></span>
      <span style="--ga-name:r2c1"></span>
      <span style="-