.announcement-card {
  background-color: #fffbea;      /* 淡いクリーム色 */
  border-left: 4px solid #ffc107; /* 黄色い強調ライン */
  border-radius: 4px;
  padding: 12px 16px;
  margin: 20px 0;
  box-shadow: 0 1px 3px rgba(0,0,0,0.1);
}

.announcement-header {
  font-weight: bold;
  margin-bottom: 8px;
  color: #856404;
}

.announcement-header i {
  margin-right: 6px;
}

.announcement-body {
  color: #5a4630;
  line-height: 1.5;
}