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

.announcement {
    max-width: 600px;
    margin: 50px auto;
    padding: 20px;
    background-color: #fff;
    box-shadow: 0 0 10px rgba(0, 0, 0, 0.1);
}

.announcement h1 {
    color: #333;
    font-size: 20px;
    text-align: center;
    margin-bottom: 20px;
}

.announcement p {
    color: #666;
    font-size: 16px;
    line-height: 1.6;
}

.info {
    margin-top: 20px;
}

.info .date,
.info .company {
    font-size: 14px;
    color: #999;
    margin: 0;
}

@media (max-width: 600px) {
    .announcement {
        margin: 10px;
        padding: 10px;
    }
}