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实例演示字体的图标和媒体查询
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  1. <!DOCTYPE html>
  2. <html lang="zh-CN">
  3. <head>
  4.     <meta charset="UTF-8">
  5.     <meta http-equiv="X-UA-Compatible" content="IE=edge">
  6.     <meta name="viewport" content="width=device-width, initial-scale=1.0">
  7.     <title>Document</title>
  8.     <style>
  9.         /* CDN 服务仅供平台体验和调试使用，平台不承诺服务的稳定性，企业客户需下载字体包自行发布使用并做好备份。 */
  10. @font-face {
  11.   font-family: 'iconfont';  /* Project id 3729000 */
  12.   src: url('//at.alicdn.com/t/c/font_3729000_n4lju3ux24b.woff2?t=1666699928473') format('woff2'),
  13.        url('//at.alicdn.com/t/c/font_3729000_n4lju3ux24b.woff?t=1666699928473') format('woff'),
  14.        url('//at.alicdn.com/t/c/font_3729000_n4lju3ux24b.ttf?t=1666699928473') format('truetype');
  15. }
  16. .iconfont.unicode{
  17.     font-family: iconfont;
  18.     font-size: xx-large;
  19.     cursor: pointer;
  20.     color: red;
  21. }
  22. .iconfont .icon-zhuce{
  23.     font-size: xx-large;
  24.     color: blue;
  25.     cursor: pointer;
  26. }
  27.     </style>
  28. <link rel="stylesheet" href="//at.alicdn.com/t/c/font_3729000_n4lju3ux24b.css">
  29. </head>
  30. <body>
  31.     <!-- unicode -->
  32.   <div class="iconfont unicode">
  33.     <span>&#xe63e;</span>
  34.   </div>
  35.   <hr>
  36.   <!-- class类 -->
  37. <div class="iconfont">
  38.     <span class="icon-zhuce"></span>
  39. </div>
  40. <hr>
  41. <style>
  42.     html{
  43.         font-size: 10px;
  44.     }
  45.     .btn.small{
  46.     font-size: 1rem;
  47.      }
  48.      .btn.middle{
  49.         font-size: 2rem;
  50.      }
  51.      .btn.large{
  52.         font-size: 3rem;
  53.      }
  54.      /* 判断最小值，并且从小到大进行判断.如果是判断最大值，就应该从大到小写 */
  55.      /* 我这边写的是移动端 故从小到大进行判断 */
  56.      /* 当最大的宽度是374px时 1rem=12px */
  57.      @media (max-width:374px) {
  58.         html{
  59.             font-size: 12px;
  60.         }
  61.      }
  62.      /* 当最大的宽度是414px 最下宽度是375时 1rem=14px */
  63.      @media (min-width:375px) and (max-width:414px) {
  64.         html{
  65.             font-size: 14px;
  66.         }
  67.      }
  68.      /* 当最小的宽度是415px时 1rem=16px */
  69.      @media (min-width:415px) {
  70.         html{
  71.             font-size: 16px;
  72.         }
  73.      }
  74. </style>
  75. <button class="btn small">按钮1</button>
  76. <button class="btn middle">按钮2</button>
  77. <button class="btn large">按钮3</button>
  78. </body>
  79. </html>

代码展示如下

  1. 随着屏幕宽度的变大,而进行的rem的值的改变,从而影响元素大小

1rem=12px
1rem=14px
1rem=16px

Correcting teacher：PHPzPHPz

Correction status：qualified

Teacher's comments：完成的很好，继续加油
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