.message-board-container {
    max-width: 800px;
    margin: 20px auto;
    padding: 20px;
    background-color: #fff;
    border-radius: 8px;
    box-shadow: 0 2px 10px rgba(0,0,0,0.05);
    background-color: rgba(255, 255, 255, 0.8);/* 80%透明度的白色 */
}

.message-board-container h1 {
    text-align: center;
    color: #333;
    margin-bottom: 30px;
}

.message-form-section {
    margin-bottom: 30px;
    padding-bottom: 20px;
    border-bottom: 1px solid #eee;
}

.message-form-section h3 {
    color: #555;
    margin-bottom: 15px;
}

#message-input {
    width: calc(100% - 22px); /* Account for padding and border */
    padding: 10px;
    border: 1px solid #ccc;
    border-radius: 4px;
    resize: vertical;
    font-size: 16px;
    margin-bottom: 10px;
}

#submit-message {
    display: block;
    width: 150px;
    padding: 10px 15px;
    background-color: #007bff;
    color: white;
    border: none;
    border-radius: 5px;
    font-size: 16px;
    cursor: pointer;
    transition: background-color 0.3s;
}

#submit-message:hover {
    background-color: #0056b3;
}

.messages-list-section h3 {
    color: #555;
    margin-bottom: 20px;
}

.message-item {
    background-color: #f9f9f9;
    border: 1px solid #eee;
    border-radius: 6px;
    padding: 15px;
    margin-bottom: 15px;
}

.message-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 10px;
    font-size: 0.9em;
    color: #777;
}

.message-username {
    font-weight: bold;
    color: #333;
}

.message-date {
    font-size: 0.85em;
}

.message-content {
    font-size: 1em;
    line-height: 1.6;
    color: #333;
    word-wrap: break-word;
}

.delete-message-btn {
    background-color: #dc3545; /* Red color for delete */
    color: white;
    border: none;
    padding: 5px 10px;
    border-radius: 4px;
    cursor: pointer;
    font-size: 0.8em;
    margin-left: 10px;
    transition: background-color 0.2s;
}

.delete-message-btn:hover {
    background-color: #c82333;
}