/* 确保这段 CSS 代码在 HTML body 加载前执行 */
details {
    margin-bottom: 15px;
    border-radius: 8px;
    border: 1px solid #dee2e6;
    box-shadow: 0 2px 4px rgba(0,0,0,0.05);
}
summary {
    cursor: pointer;
    background-color: #f8f9fa;
    padding: 15px 20px;
    border-radius: 8px;
    outline: none;
    transition: background-color 0.3s;
}
details[open] summary {
    background-color: #e9ecef;
    border-bottom-left-radius: 0;
    border-bottom-right-radius: 0;
}