.email-not-received {
    max-width: 800px;
    margin: 20px auto;
    padding: 20px;
    background-color: #f9f9f9;
    /* border-left: 4px solid #0073e6; */
    border-radius: 8px;
    font-family: Arial, sans-serif;
    line-height: 1.8;
    color: #333;
    font-size: 18px;
    /* PC端正文字体调大 */
  }

  .email-not-received ol {
    padding-left: 25px;
  }

  .email-not-received li {
    margin-bottom: 18px;
  }

  .email-not-received a {
    color: #0073e6;
    text-decoration: underline;
  }

  @media screen and (max-width: 600px) {
    .email-not-received {
      padding: 15px;
      margin: 10px;
      font-size: 16px;
      /* 手机端保持原来大小 */
    }

    .email-not-received h2 {
      font-size: 1.5em;
    }

    .email-not-received ol {
      padding-left: 20px;
    }
  }