* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, sans-serif;
    background-color: #f5f5f5;
    color: #333;
    line-height: 1.6;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 20px;
}

.header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 20px 0;
    border-bottom: 1px solid #ddd;
    margin-bottom: 20px;
}

.header h1 {
    font-size: 24px;
    font-weight: 600;
}

.actions {
    display: flex;
    gap: 10px;
}

.btn {
    padding: 10px 20px;
    border: none;
    border-radius: 5px;
    background-color: #007bff;
    color: white;
    cursor: pointer;
    font-size: 14px;
    transition: background-color 0.2s ease;
}

.btn:hover {
    background-color: #0056b3;
}

.main {
    margin: 20px 0;
}

#book {
    width: 100%;
    background-color: white;
    border-radius: 8px;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
}

.footer {
    text-align: center;
    padding: 20px 0;
    border-top: 1px solid #ddd;
    margin-top: 20px;
    color: #666;
    font-size: 14px;
}

/* 响应式设计 */
@media (max-width: 768px) {
    .header {
        flex-direction: column;
        gap: 15px;
    }
    
    .header h1 {
        font-size: 20px;
    }
    
    .actions {
        width: 100%;
        justify-content: center;
    }
    
    .btn {
        flex: 1;
        max-width: 150px;
    }
}