/* 基础页面样式 */
        .faq-container {
            max-width: 900px;
            margin: 40px auto;
            padding: 0 20px;
            font-family: Arial, sans-serif;
            color: #333;
            line-height: 1.6;
        }
        
        .faq-title {
            text-align: center;
            margin-bottom: 40px;
            font-size: 2.2rem;
            font-weight: bold;
        }

        /* 分类大标题样式 */
        .faq-section-title {
            margin-top: 50px;
            margin-bottom: 20px;
            color: #222;
            border-left: 4px solid #0066cc;
            padding-left: 12px;
            font-size: 1.5rem;
            font-weight: bold;
        }

        /* 原生风琴式折叠样式 */
        details {
            background: #f9f9f9;
            padding: 16px 20px;
            border-radius: 6px;
            margin-bottom: 14px;
            border: 1px solid #ddd;
            transition: background 0.3s ease;
        }
        
        details[open] {
            background: #fff;
            border-color: #0066cc;
            box-shadow: 0 2px 8px rgba(0,0,0,0.05);
        }

        summary {
            font-weight: bold;
            font-size: 1.2rem;
            cursor: pointer;
            outline: none;
            list-style: none; /* 隐藏默认小箭头 */
            position: relative;
            padding-right: 30px;
        }

        /* 用 CSS 自己画一个加减号 (+/-) 切换图标 */
        summary::after {
            content: '+';
            position: absolute;
            right: 0;
            top: 50%;
            transform: translateY(-50%);
            font-size: 1.4rem;
            color: #0066cc;
            transition: transform 0.3s ease;
        }

        details[open] summary::after {
            content: '−';
            color: #ff0000;
        }

        /* 隐藏默认的 Safari 箭头 */
        summary::-webkit-details-marker {
            display: none;
        }

        /* 展开后的答案文本样式 */
        .faq-content {
            margin-top: 15px;
            padding-top: 15px;
            border-top: 1px solid #eee;
            color: #555;
            font-size: 1.15rem; /* 保持放大的字号，方便客户阅读 */
        }

        /* 📱 手机移动端响应式布局优化 */
        @media (max-width: 600px) {
            .faq-container {
                margin: 20px auto;
                padding: 0 15px;
            }
            .faq-title {
                font-size: 1.5rem;
                margin-bottom: 30px;
            }
            .faq-section-title {
                font-size: 1.2rem;
                margin-top: 35px;
                margin-bottom: 15px;
            }
            summary {
                font-size: 1rem; 
            }
            .faq-content {
                font-size: 1rem; /* 移动端答案字号同步保持清晰放大状态 */
            }
        }