body {
    font-family: Arial, sans-serif;
    background-color: #f4f4f4;
    color: #333;
    margin: 0;
    padding: 0;
}

.announcement {
    background-color: #fff;
    border-left: 4px solid #0078D7;
    margin: 20px;
    padding: 20px;
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
}

.announcement h2 {
    color: #0078D7;
    margin-top: 0;
}

.announcement p {
    line-height: 1.6;
}
.announcement img {
    display: block;
    margin: 0 auto; /* 让图片在其容器中居中 */
    max-width: 100%; /* 确保图片不会超过其容器宽度 */
    height: auto; /* 保持图片的原始纵横比 */
}