/* 1. 基础容器 */
    .faq-clean-section {
        max-width: 1000px;
        margin: 60px auto;
        padding: 0 20px;
        font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
        color: #0f172a;
    }

    /* 标题样式 */
    .faq-clean-title {
        text-align: center;
        font-size: 36px;
        font-weight: 800;
        margin-bottom: 50px;
        color: #0f172a;
        letter-spacing: -0.02em;
    }

    /* 2. 折叠项样式 */
    .faq-item {
        border-bottom: 1px solid #e2e8f0; /* 极细分割线 */
    }

    /* 隐藏原生箭头 */
    .faq-item summary {
        list-style: none;
        display: flex;
        justify-content: space-between;
        align-items: center;
        padding: 25px 0;
        font-size: 18px;
        font-weight: 700;
        cursor: pointer;
        outline: none;
        transition: color 0.3s ease;
    }
    
    .faq-item summary::-webkit-details-marker {
        display: none;
    }

    /* 3. 状态图标 (+ / -) */
    .faq-toggle-icon {
        position: relative;
        width: 16px;
        height: 16px;
        flex-shrink: 0;
    }

    /* 创建加号的两条线 */
    .faq-toggle-icon::before,
    .faq-toggle-icon::after {
        content: "";
        position: absolute;
        background-color: #94a3b8; /* 默认灰色图标 */
        transition: transform 0.3s ease, opacity 0.3s ease;
    }

    /* 横线 */
    .faq-toggle-icon::before {
        top: 7px;
        left: 0;
        width: 100%;
        height: 2px;
    }

    /* 竖线 */
    .faq-toggle-icon::after {
        top: 0;
        left: 7px;
        width: 2px;
        height: 100%;
    }

    /* 展开状态下的图标变化 (变为减号) */
    .faq-item[open] .faq-toggle-icon::after {
        transform: rotate(90deg);
        opacity: 0;
    }

    /* 4. 答案内容样式 */
    .faq-content {
        padding-bottom: 25px;
        font-size: 16px;
        line-height: 1.6;
        color: #475569;
        max-width: 95%;
    }

    /* 5. 特殊配色：还原图中第二个问题的文字颜色 */
    .faq-item.highlight summary {
        color: #56B8B8; /* 您的主色调 */
    }

    /* 悬停效果 */
    .faq-item summary:hover {
        color: #56B8B8;
    }

    /* 移动端适配 */
    @media (max-width: 768px) {
        .faq-clean-title { font-size: 28px; }
        .faq-item summary { font-size: 16px; padding: 20px 0; }
        .faq-content { font-size: 14.5px; }
    }