.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;
        }
    }