lex
/
classroom-instruments


			
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<html lang="zh-CN">


<head>
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  <title>音乐数字课堂</title>

  <style>
    body {
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    .bgImg {
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      height: 27.1875vw;
    }

    .btnImg {
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      left: 50%;
      margin-left: -7.5vw;
      bottom: 1.61458333vw;
      cursor: pointer;
      z-index: 100;

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      font-size: 1.14583333rem;
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      border: none;
      font-size: 1.14583333rem;
      font-weight: 600;
      color: #FFFFFF;
      line-height: 1.5625vw;
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      margin-top: 1.66666667vw;
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