console 命令行工具 X clear

console

<body>
  <div>
    Test (23.5 * 0.8 = 18.75px)
      <div>
        Test (18.75 * 0.8 = 15px)
          <div>
            Test (15 * 0.8 = 12px)
              <div>
                Test (12 * 0.8 = 9.6px)
              </div>
          </div>
     </div>
  </div>
</body>

body {
  font-size: 23.5px;
  text-align: center;
  background: #ff5722;
}

div {
  font-size: .8em;
  color: #64ffda;
  font-weight: bold;
  padding: 2em;
}