/* ============================================================
   help.css - 帮助中心/公告/单页 专属样式
   ============================================================ */

/* ---------- 面包屑 ---------- */
.breadcrumb {
    padding: 12px 0 16px;
    font-size: 13px;
    color: var(--color-text-secondary);
}
.breadcrumb a { color: var(--color-text-secondary); }
.breadcrumb a:hover { color: var(--color-primary); }
.breadcrumb .sep { margin: 0 6px; color: var(--color-border); }

/* ---------- 页面标题 ---------- */
.page-header {
    text-align: center;
    padding-bottom: 20px;
    border-bottom: 2px solid var(--color-border-light);
    margin-bottom: 24px;
}
.page-header h1 {
    font-size: var(--font-size-2xl);
    font-weight: 700;
    color: var(--color-primary);
}
.page-header .sub-title {
    font-size: 14px;
    color: var(--color-text-secondary);
    margin-top: 4px;
}

/* ---------- 帮助布局 ---------- */
.help-layout {
    display: flex;
    gap: var(--spacing-lg);
    align-items: flex-start;
}
.help-main {
    flex: 1;
    min-width: 0;
    max-width: 100%;
}
.help-sidebar {
    flex: 0 0 220px;
    min-width: 0;
    max-width: 100%;
}

/* ---------- 侧边栏 ---------- */
.help-sidebar .sidebar-box {
    background: var(--color-bg-white);
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-sm);
    padding: var(--spacing-md);
    max-width: 100%;
    width: 100%;
    box-sizing: border-box;
    overflow: hidden;
}
.help-sidebar .sidebar-title {
    font-weight: 700;
    font-size: var(--font-size-md);
    color: var(--color-primary);
    padding-bottom: 10px;
    border-bottom: 2px solid var(--color-primary);
    margin-bottom: 12px;
}
.help-sidebar .sidebar-menu {
    list-style: none;
    padding: 0;
    margin: 0;
}
.help-sidebar .sidebar-menu .menu-item {
    border-bottom: 1px solid var(--color-border-light);
}
.help-sidebar .sidebar-menu .menu-item:last-child {
    border-bottom: none;
}
.help-sidebar .sidebar-menu .menu-link {
    display: block;
    padding: 8px 0 8px 12px;
    font-weight: 600;
    font-size: 13px;
    color: var(--color-text);
    border-left: 3px solid transparent;
    transition: all 0.25s ease;
}
.help-sidebar .sidebar-menu .menu-link:hover {
    color: var(--color-primary);
    border-left-color: var(--color-primary);
    padding-left: 16px;
}
.help-sidebar .sidebar-menu .sub-menu {
    list-style: none;
    padding: 0 0 6px 0;
    margin: 0;
}
.help-sidebar .sidebar-menu .sub-menu li {
    padding: 2px 0;
}
.help-sidebar .sidebar-menu .sub-menu li a {
    display: block;
    padding: 4px 0 4px 24px;
    font-size: 12px;
    color: var(--color-text-secondary);
    transition: all 0.2s ease;
}
.help-sidebar .sidebar-menu .sub-menu li a:hover {
    color: var(--color-primary);
    padding-left: 28px;
}

/* ---------- 帮助列表 ---------- */
.help-list-wrap {
    background: var(--color-bg-white);
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-sm);
    padding: 0 var(--spacing-md);
    max-width: 100%;
    box-sizing: border-box;
    overflow: hidden;
}
.help-list-wrap .list-header {
    padding: 14px 0 10px;
    border-bottom: 2px solid var(--color-border-light);
    margin-bottom: 4px;
}
.help-list-wrap .list-header h3 {
    font-size: var(--font-size-md);
    font-weight: 700;
    margin: 0;
    color: var(--color-text);
}
.help-list {
    list-style: none;
    padding: 0;
    margin: 0;
}
.help-list li {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 10px 0;
    border-bottom: 1px solid var(--color-border-light);
}
.help-list li:last-child {
    border-bottom: none;
}
.help-list li.divider {
    border-bottom: 2px dashed var(--color-border-light);
    padding: 0;
}
.help-list .item-title {
    flex: 1;
    font-size: 14px;
    color: var(--color-text);
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}
.help-list .item-title:hover {
    color: var(--color-primary);
}
.help-list .item-date {
    flex-shrink: 0;
    margin-left: var(--spacing-md);
    font-size: 12px;
    color: var(--color-text-muted);
}

/* ---------- 详情页 ---------- */
.help-detail {
    background: var(--color-bg-white);
    border-radius: var(--radius-md);
    padding: var(--spacing-lg);
    box-shadow: var(--shadow-sm);
    max-width: 100%;
    box-sizing: border-box;
    overflow: hidden;
}
.help-detail * {
    max-width: 100%;
    box-sizing: border-box;
}
.help-detail .detail-title {
    font-size: var(--font-size-xl);
    font-weight: 700;
    margin-bottom: var(--spacing-md);
}
.help-detail .detail-meta {
    display: flex;
    flex-wrap: wrap;
    gap: 8px 20px;
    font-size: 12px;
    color: var(--color-text-secondary);
    padding-bottom: var(--spacing-md);
    border-bottom: 1px solid var(--color-border-light);
    margin-bottom: var(--spacing-md);
}
.help-detail .detail-meta .qr-trigger {
    color: var(--color-primary);
    cursor: pointer;
}
.help-detail .detail-meta .qr-trigger:hover {
    text-decoration: underline;
}
.help-detail .detail-body {
    font-size: 15px;
    line-height: 1.9;
    color: #333;
    overflow: hidden;
    word-wrap: break-word;
}
.help-detail .detail-body img {
    max-width: 100%;
    height: auto;
    display: block;
}
.help-detail .detail-prevnext {
    padding: var(--spacing-md) 0 0;
    border-top: 1px solid var(--color-border-light);
    margin-top: var(--spacing-md);
}
.help-detail .detail-prevnext p {
    font-size: 13px;
    color: var(--color-text-secondary);
    padding: 2px 0;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}
.help-detail .detail-prevnext p a {
    color: var(--color-text);
}
.help-detail .detail-prevnext p a:hover {
    color: var(--color-primary);
}

/* ---------- 二维码弹窗 ---------- */
.qr-popup {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 9999;
    pointer-events: none;
}
.qr-popup .qr-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.5);
    z-index: 1;
    pointer-events: auto;
    cursor: pointer;
}
.qr-popup .qr-popup-content {
    position: fixed;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    background: #fff;
    border-radius: 16px;
    padding: 32px 36px 24px;
    text-align: center;
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.3);
    pointer-events: auto;
    min-width: 200px;
    max-width: 90vw;
    z-index: 2;
}
.qr-popup .qr-popup-content p {
    margin: 0 0 12px 0;
    font-size: 16px;
    font-weight: 600;
    color: var(--color-text);
}
.qr-popup .qr-popup-content img {
    width: 180px;
    height: 180px;
    display: block;
    margin: 0 auto;
    border-radius: 8px;
}
.qr-popup .qr-popup-content .qr-tip {
    margin-top: 12px;
    font-size: 12px;
    font-weight: 400;
    color: var(--color-text-muted);
}
.qr-popup-close {
    position: absolute;
    top: 8px;
    right: 14px;
    background: none;
    border: none;
    font-size: 22px;
    color: var(--color-text-muted);
    cursor: pointer;
    padding: 4px 8px;
    line-height: 1;
    transition: color 0.2s;
    z-index: 3;
}
.qr-popup-close:hover {
    color: var(--color-text);
}

/* ---------- 操作提示页 ---------- */
.tips-box {
    background: var(--color-bg-white);
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-md);
    padding: 48px 32px 40px;
    text-align: center;
    max-width: 600px;
    margin: 20px auto;
}
.tips-box .tips-icon {
    font-size: 56px;
    margin-bottom: 16px;
}
.tips-box .tips-title {
    font-size: var(--font-size-xl);
    font-weight: 700;
    color: var(--color-text);
    margin-bottom: 12px;
}
.tips-box .tips-message {
    font-size: 15px;
    color: var(--color-text-secondary);
    line-height: 1.8;
    margin-bottom: 20px;
}
.tips-box .tips-jump a {
    color: var(--color-primary);
    font-size: 13px;
}
.tips-box .tips-jump a:hover {
    text-decoration: underline;
}

/* ---------- 分页 ---------- */
.pagination-wrapper {
    padding: var(--spacing-md) 0;
}
.pagination {
    display: flex;
    flex-wrap: wrap;
    gap: 4px;
    justify-content: center;
}
.pagination a,
.pagination .current,
.pagination .ellipsis {
    display: inline-block;
    padding: 6px 13px;
    border-radius: var(--radius-sm);
    font-size: 13px;
    transition: all 0.25s;
    min-width: 36px;
    text-align: center;
}
.pagination a {
    background: var(--color-bg-light);
    color: var(--color-text-secondary);
}
.pagination a:hover {
    background: var(--color-primary-light);
    color: var(--color-primary);
}
.pagination .current {
    background: var(--color-primary);
    color: #fff;
    font-weight: 700;
}
.pagination .ellipsis {
    background: transparent;
    color: var(--color-text-muted);
    padding: 6px 4px;
}
.pagination .first,
.pagination .last,
.pagination .prev,
.pagination .next {
    font-size: 15px;
    padding: 6px 10px;
}

/* ============================================================
   平板响应式
   ============================================================ */
@media (max-width: 992px) {
    .help-sidebar {
        flex: 0 0 200px;
    }
}

/* ============================================================
   手机端响应式
   ============================================================ */
@media (max-width: 768px) {
    .container {
        padding: 0 12px;
    }

    .help-layout {
        flex-direction: column;
        gap: var(--spacing-md);
    }
    .help-main {
        width: 100%;
        max-width: 100%;
    }
    .help-sidebar {
        flex: 0 0 auto;
        width: 100%;
        max-width: 100%;
    }

    .page-header h1 {
        font-size: var(--font-size-xl);
    }
    .page-header .sub-title {
        font-size: 12px;
    }

    .help-sidebar .sidebar-box {
        padding: 12px;
    }

    .help-list-wrap {
        padding: 0 12px;
    }
    .help-list .item-title {
        font-size: 13px;
    }
    .help-list .item-date {
        font-size: 11px;
    }

    .help-detail {
        padding: 14px 16px;
    }
    .help-detail .detail-title {
        font-size: 17px;
    }
    .help-detail .detail-body {
        font-size: 14px;
        line-height: 1.8;
    }
    .help-detail .detail-meta {
        font-size: 11px;
        gap: 4px 10px;
    }

    .qr-popup .qr-popup-content {
        padding: 24px 20px 20px;
        border-radius: 12px;
        max-width: 85vw;
    }
    .qr-popup .qr-popup-content img {
        width: 150px;
        height: 150px;
    }
    .qr-popup .qr-popup-content p {
        font-size: 14px;
    }

    .tips-box {
        padding: 32px 20px 28px;
        margin: 10px 0;
    }
    .tips-box .tips-icon {
        font-size: 44px;
    }
    .tips-box .tips-title {
        font-size: var(--font-size-lg);
    }
    .tips-box .tips-message {
        font-size: 14px;
    }

    .pagination a,
    .pagination .current,
    .pagination .ellipsis {
        padding: 4px 10px;
        font-size: 12px;
        min-width: 30px;
    }
}

@media (max-width: 480px) {
    .container {
        padding: 0 8px;
    }

    .page-header h1 {
        font-size: 18px;
    }
    .page-header .sub-title {
        font-size: 11px;
    }

    .help-sidebar .sidebar-menu .menu-link {
        font-size: 12px;
        padding: 6px 0 6px 10px;
    }
    .help-sidebar .sidebar-menu .sub-menu li a {
        font-size: 11px;
        padding: 3px 0 3px 18px;
    }

    .help-list .item-title {
        font-size: 12px;
    }
    .help-list .item-date {
        font-size: 10px;
    }

    .help-detail {
        padding: 10px 12px;
    }
    .help-detail .detail-title {
        font-size: 15px;
    }
    .help-detail .detail-body {
        font-size: 13px;
    }
    .help-detail .detail-meta {
        font-size: 10px;
        gap: 3px 8px;
    }
    .help-detail .detail-prevnext p {
        font-size: 12px;
    }

    .qr-popup .qr-popup-content {
        padding: 20px 16px 16px;
        border-radius: 10px;
        max-width: 80vw;
    }
    .qr-popup .qr-popup-content img {
        width: 120px;
        height: 120px;
    }
    .qr-popup .qr-popup-content p {
        font-size: 13px;
        margin-bottom: 8px;
    }
    .qr-popup-close {
        font-size: 18px;
        top: 4px;
        right: 10px;
    }

    .tips-box {
        padding: 24px 16px 20px;
    }
    .tips-box .tips-icon {
        font-size: 36px;
    }
    .tips-box .tips-title {
        font-size: 16px;
    }
    .tips-box .tips-message {
        font-size: 13px;
    }

    .pagination a,
    .pagination .current,
    .pagination .ellipsis {
        padding: 3px 7px;
        font-size: 11px;
        min-width: 24px;
    }
    .pagination .first,
    .pagination .last,
    .pagination .prev,
    .pagination .next {
        font-size: 12px;
        padding: 3px 6px;
    }
}
/* ---------- 侧边栏 - 手机端手风琴 ---------- */
@media (max-width: 768px) {
    .help-sidebar .sidebar-menu .menu-item {
        border-bottom: 1px solid var(--color-border-light);
    }
    .help-sidebar .sidebar-menu .menu-link {
        position: relative;
        padding-right: 32px;
        cursor: pointer;
        user-select: none;
    }
    /* 展开/收起箭头 */
    .help-sidebar .sidebar-menu .menu-link.has-sub::after {
        content: '▸';
        position: absolute;
        right: 8px;
        top: 50%;
        transform: translateY(-50%);
        font-size: 16px;
        color: var(--color-text-muted);
        transition: transform 0.3s ease;
    }
    .help-sidebar .sidebar-menu .menu-link.has-sub.open::after {
        transform: translateY(-50%) rotate(90deg);
    }
    /* 二级菜单默认隐藏 */
    .help-sidebar .sidebar-menu .sub-menu {
        display: none;
        padding-left: 12px;
        background: var(--color-bg-light);
        border-radius: var(--radius-sm);
        margin: 0 0 4px 0;
    }
    .help-sidebar .sidebar-menu .sub-menu.open {
        display: block;
    }
    .help-sidebar .sidebar-menu .sub-menu li a {
        padding: 6px 0 6px 16px;
        font-size: 12px;
        border-bottom: 1px solid var(--color-border-light);
    }
    .help-sidebar .sidebar-menu .sub-menu li:last-child a {
        border-bottom: none;
    }
    /* 当前高亮（在手机端保持可见） */
    .help-sidebar .sidebar-menu .sub-menu li a.active {
        color: var(--color-primary);
        font-weight: 600;
    }
    /* 手机端"网站公告"特殊处理 */
    .help-sidebar .sidebar-menu .menu-item:first-child .sub-menu {
        display: block;
        background: transparent;
        padding-left: 0;
    }
}