/* 基础变量与样式 */
    :root {
        --color-primary: #1D2F46;
        --color-accent: #00E5FF;
        --text-main: #303133;
        --text-regular: #606266;
        --text-secondary: #909399;
        --border-color: #E4E7ED;
        --bg-color: #F5F7FA;
        --bg-card: #FFFFFF;
    }

    .faq-wrapper {
        background-color: var(--bg-color);
        color: var(--text-main);
        padding: 0 20px 60px;
        box-sizing: border-box;
    }

    .faq-wrapper a {
        text-decoration: none;
        color: inherit;
        transition: color 0.3s;
    }

    .faq-wrapper ul {
        list-style: none;
        padding: 0;
        margin: 0;
    }

    /* 顶部区域：大标题 + 搜索框居中 */
    .faq-topbar {
        background-color: var(--bg-card);
        border-bottom: 1px solid var(--border-color);
        padding: 60px 20px;
        max-width: var(--layout-content-width, 1440px);
        margin: 20px auto 0;
        border-radius: 12px;
        box-sizing: border-box;
        width: 100%;
    }

    .topbar-container {
        max-width: 1000px;
        margin: 0 auto;
        display: flex;
        flex-direction: column;
        align-items: center;
        text-align: center;
        gap: 24px;
    }

    .topbar-title {
        font-size: 36px;
        font-weight: 700;
        color: #000;
        margin: 0;
    }

    .topbar-desc {
        font-size: 16px;
        color: var(--text-regular);
        margin: 0;
        line-height: 1.6;
    }

    /* 大搜索框 */
    .ai-search-wrapper {
        position: relative;
        width: 100%;
        display: flex;
        gap: 12px;
        margin-top: 10px;
    }

    .ai-search-input-box {
        position: relative;
        flex-grow: 1;
    }

    .ai-search-input {
        width: 100%;
        padding: 16px 20px 16px 48px;
        border: 2px solid #000;
        border-radius: 8px;
        font-size: 16px;
        outline: none;
        box-sizing: border-box;
        transition: border-color 0.3s, box-shadow 0.3s;
    }

    .ai-search-input:focus {
        box-shadow: 0 4px 12px rgba(0,0,0,0.05);
    }

    .ai-search-icon {
        position: absolute;
        left: 18px;
        top: 50%;
        transform: translateY(-50%);
        color: #000;
        font-size: 20px;
    }

    .ai-search-btn {
        background: #000;
        color: #fff;
        border: none;
        padding: 0 32px;
        border-radius: 8px;
        font-size: 16px;
        font-weight: 500;
        cursor: pointer;
        transition: background-color 0.3s;
        white-space: nowrap;
    }

    .ai-search-btn:hover {
        background: #333;
    }

    /* 布局容器 */
    .faq-wrapper .main-container {
        max-width: var(--layout-content-width, 1440px);
        margin: 40px auto 80px;
        padding: 0;
        display: grid;
        grid-template-columns: 380px 1fr;
        gap: 40px;
        align-items: start;
        box-sizing: border-box;
        width: 100%;
    }

    /* ================= 左侧边栏导航样式 ================= */
    .sidebar-nav {
        position: sticky;
        top: 20px;
        display: flex;
        flex-direction: column;
        gap: 20px;
    }

    .nav-wrapper {
        background-color: var(--bg-card);
        border-radius: 12px;
        padding: 20px 0;
        box-shadow: 0 2px 12px rgba(0, 0, 0, 0.04);
        border: 1px solid var(--border-color);
    }

    .nav-header {
        font-size: 16px;
        font-weight: 600;
        color: var(--text-main);
        padding: 0 24px 16px;
        border-bottom: 1px solid var(--border-color);
        margin-bottom: 12px;
        display: flex;
        align-items: center;
        gap: 8px;
    }

    .nav-header iconify-icon {
        font-size: 18px;
    }

    .simple-nav-list {
        display: flex;
        flex-direction: column;
        padding: 0 12px 12px;
        gap: 8px;
    }

    .simple-nav-item {
        display: flex;
        justify-content: space-between;
        align-items: center;
        padding: 12px 16px;
        cursor: pointer;
        transition: all 0.3s ease;
        color: var(--text-regular);
        font-size: 14px;
        border-radius: 8px;
    }

    .simple-nav-item-left {
        display: flex;
        align-items: center;
        gap: 12px;
    }

    .simple-nav-item-left iconify-icon {
        font-size: 18px;
        opacity: 0.8;
    }

    .nav-count {
        background-color: #F4F4F5;
        color: var(--text-secondary);
        font-size: 12px;
        padding: 2px 8px;
        border-radius: 12px;
        transition: all 0.3s;
    }

    .simple-nav-item:hover {
        background-color: #F4F4F5;
        color: #000;
    }

    .simple-nav-item.active {
        background-color: #000;
        color: #fff;
        font-weight: 500;
    }

    .simple-nav-item.active .simple-nav-item-left iconify-icon {
        opacity: 1;
        color: #fff;
    }

    .simple-nav-item.active .nav-count {
        background-color: #333;
        color: #fff;
    }

    /* ================= 中间：FAQ 手风琴列表 ================= */
    .faq-main {
        background-color: transparent;
        border-radius: 0;
        padding: 0;
        box-shadow: none;
        border: none;
    }

    .faq-category-title {
        font-size: 24px;
        font-weight: 600;
        color: #000;
        margin: 0 0 24px;
        display: flex;
        align-items: center;
        gap: 10px;
    }

    /* 覆写 Element UI Collapse 样式 */
    .faq-collapse {
        border-top: none;
        border-bottom: none;
        display: flex;
        flex-direction: column;
        gap: 16px;
    }

    .faq-collapse .el-collapse-item {
        background-color: var(--bg-card);
        border-radius: 12px;
        border: 1px solid var(--border-color);
        overflow: hidden;
        box-shadow: 0 2px 8px rgba(0, 0, 0, 0.02);
        transition: box-shadow 0.3s, border-color 0.3s;
    }

    .faq-collapse .el-collapse-item:hover {
        box-shadow: 0 4px 12px rgba(0, 0, 0, 0.05);
        border-color: #dcdfe6;
    }

    .faq-collapse .el-collapse-item__header {
        font-size: 16px;
        font-weight: 500;
        color: #000;
        border-bottom: none;
        padding: 0 24px;
        height: 64px;
        line-height: 64px;
        background-color: transparent;
    }

    .faq-collapse .el-collapse-item__header.is-active {
        border-bottom: 1px solid var(--border-color);
        color: var(--color-primary);
    }

    .faq-collapse .el-collapse-item__wrap {
        border-bottom: none;
        background-color: transparent;
    }

    .faq-collapse .el-collapse-item__content {
        padding: 24px;
        font-size: 15px;
        color: var(--text-regular);
        line-height: 1.8;
    }

    .faq-collapse .el-collapse-item__content p {
        margin: 0 0 16px;
    }
    
    .faq-collapse .el-collapse-item__content p:last-child {
        margin-bottom: 0;
    }

    .faq-collapse .el-collapse-item__content a {
        color: var(--color-primary);
        text-decoration: underline;
    }

    .faq-collapse .el-collapse-item__content a:hover {
        color: #000;
    }

    /* 响应式断点 */
    @media (max-width: 992px) {
        .faq-wrapper .main-container {
            grid-template-columns: 1fr;
        }
    }

    @media (max-width: 768px) {
        .faq-topbar {
            padding: 40px 20px;
        }
        .topbar-title {
            font-size: 28px;
        }
        .ai-search-wrapper {
            flex-direction: column;
        }
        .ai-search-btn {
            width: 100%;
            padding: 14px 0;
        }
        .faq-collapse .el-collapse-item__header {
            height: auto;
            line-height: 1.5;
            padding: 16px 20px;
        }
        .faq-collapse .el-collapse-item__content {
            padding: 20px;
        }
    }