.study_main h1 {
    text-align: center;
    color: #000000;
    font-size: 30px;
    padding: 2rem;
    
  }
  .study_main h2 {
    border-bottom: 2px solid #ccc;
    padding-bottom: 0.3em;
    margin-top: 2em;
    margin-left: 1rem;
    margin-right: 80%;
    color: #2a2a2a;
    font-size:25px;
    padding-left: 1rem;
  }
  .study_main h3{
    position: relative;
    left: 3px;
    padding-bottom: 1rem;
  }
  .study_main ul {
    padding: 0.5rem;
    list-style: disc;
    padding-left: 1.5em;
  }

  .study_main li {
    margin-bottom: 0.8em;
  }

  /* 背景 */
  .study_wrapper{
    margin: 1rem;
    background-color: rgb(247, 247, 247);
    border-radius: 15px;
  }