body {
    font-family: Arial, sans-serif;
    margin: 0;
    padding: 0;
    background-color: #f5f5f5;
}

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

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

.query-form {
    background: white;
    padding: 20px;
    border-radius: 8px;
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
    margin-bottom: 20px;
}

/* 响应式设计：适应小屏幕 */
.date-range, .search-fields {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 20px;
    margin-bottom: 20px;
}

@media (max-width: 768px) {
    .date-range, .search-fields {
        grid-template-columns: 1fr; /* 小屏幕下改为单列布局 */
    }
}

.input-group {
    display: flex;
    flex-direction: column;
}

.input-group label {
    margin-bottom: 5px;
    color: #666;
}

input {
    padding: 10px;
    border: 1px solid #ddd;
    border-radius: 4px;
    font-size: 14px;
}

.button-group {
    display: flex;
    gap: 10px;
    justify-content: center;
    flex-wrap: wrap; /* 确保按钮在小屏幕下不会溢出 */
}

button {
    padding: 10px 20px;
    border: none;
    border-radius: 4px;
    cursor: pointer;
    font-size: 14px;
    transition: background-color 0.3s;
}

.primary-btn {
    background-color: #4CAF50;
    color: white;
}

.primary-btn:hover {
    background-color: #45a049;
}

.secondary-btn {
    background-color: #2196F3;
    color: white;
}

.secondary-btn:hover {
    background-color: #1976D2;
}

.secondary-btn:disabled {
    background-color: #cccccc;
    cursor: not-allowed;
}

#results {
    background: white;
    padding: 20px;
    border-radius: 8px;
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
}

.order-card {
    border: 1px solid #eee;
    padding: 15px;
    margin-bottom: 15px;
    border-radius: 4px;
}

.order-card h3 {
    margin-top: 0;
    color: #333;
}

.order-card p {
    margin: 5px 0;
    color: #666;
}

.order-card ul {
    margin: 10px 0;
    padding-left: 20px;
}

.order-card li {
    color: #666;
    margin: 5px 0;
}

.no-results {
    text-align: center;
    color: #666;
    padding: 20px;
}

.error-message {
    color: #f44336;
    text-align: center;
    padding: 20px;
}

/* 进一步优化手机端显示 */
@media (max-width: 600px) {
    .container {
        padding: 15px; /* 减小边距，适应小屏幕 */
    }
    
    input {
        padding: 8px; /* 缩小输入框内边距以适应屏幕 */
    }

    button {
        padding: 10px 15px; /* 调整按钮大小 */
        font-size: 12px; /* 缩小字体以适应屏幕 */
    }

    .order-card {
        padding: 10px; /* 调整卡片的内边距 */
    }

    h1 {
        font-size: 22px; /* 调整标题大小 */
        margin-bottom: 20px;
    }
    
    .no-results, .error-message {
        padding: 10px; /* 调整无结果和错误消息的内边距 */
    }
}