/* ==================== 变量定义 ==================== */
:root {
    --primary-color: #1890FF;
    --primary-dark: #096DD9;
    --primary-light: #40a9ff;
    --success-color: #52C41A;
    --warning-color: #FAAD14;
    --danger-color: #F5222D;
    --purple-color: #722ED1;
    --orange-color: #FA8C16;

    --bg-color: #F0F2F5;
    --card-bg: #FFFFFF;
    --text-primary: #262626;
    --text-secondary: #8C8C8C;
    --text-muted: #BFBFBF;
    --border-color: #E8E8E8;
    --border-light: #F0F0F0;

    --sidebar-width: 240px;
    --sidebar-collapsed-width: 64px;
    --header-height: 56px;
    --footer-height: 48px;

    --shadow-sm: 0 1px 2px rgba(0,0,0,0.03), 0 2px 4px rgba(0,0,0,0.03);
    --shadow-md: 0 4px 12px rgba(0,0,0,0.1);
    --shadow-lg: 0 8px 24px rgba(0,0,0,0.12);

    --radius-sm: 4px;
    --radius-md: 6px;
    --radius-lg: 8px;
    --radius-xl: 12px;

    --transition: all 0.3s ease;
}

/* ==================== 基础重置 ==================== */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html, body {
    height: 100%;
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    font-size: 14px;
    color: var(--text-primary);
    background: var(--bg-color);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

a {
    color: var(--primary-color);
    text-decoration: none;
    transition: var(--transition);
}

a:hover {
    color: var(--primary-dark);
}

/* ==================== 布局容器 ==================== */
.app-container {
    display: flex;
    min-height: 100vh;
}

/* ==================== 侧边栏 ==================== */
.sidebar {
    position: fixed;
    left: 0;
    top: 0;
    bottom: 0;
    width: var(--sidebar-width);
    background: linear-gradient(180deg, #001529 0%, #000c17 100%);
    color: #fff;
    z-index: 1000;
    overflow-y: auto;
    transition: var(--transition);
}

.sidebar.collapsed {
    width: var(--sidebar-collapsed-width);
}

.sidebar.collapsed .logo-text,
.sidebar.collapsed .nav-item span,
.sidebar.collapsed .nav-section-title {
    display: none;
}

.sidebar.collapsed .nav-item {
    justify-content: center;
    padding: 12px;
}

.sidebar.collapsed .nav-item i {
    margin-right: 0;
    font-size: 18px;
}

.sidebar-header {
    height: var(--header-height);
    display: flex;
    align-items: center;
    padding: 0 20px;
    border-bottom: 1px solid rgba(255,255,255,0.1);
}

.logo {
    display: flex;
    align-items: center;
    gap: 12px;
}

.logo i {
    font-size: 28px;
    color: var(--primary-color);
}

.logo-text {
    font-size: 16px;
    font-weight: 600;
    white-space: nowrap;
}

.sidebar-nav {
    padding: 16px 0;
}

.nav-section {
    margin-bottom: 8px;
}

.nav-section-title {
    padding: 8px 20px;
    font-size: 12px;
    color: rgba(255,255,255,0.45);
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.nav-item {
    display: flex;
    align-items: center;
    padding: 10px 20px;
    color: rgba(255,255,255,0.75);
    transition: var(--transition);
    border-left: 3px solid transparent;
}

.nav-item:hover {
    color: #fff;
    background: rgba(255,255,255,0.08);
}

.nav-item.active {
    color: #fff;
    background: var(--primary-color);
    border-left-color: var(--primary-color);
}

.nav-item i {
    width: 20px;
    margin-right: 12px;
    font-size: 16px;
}

/* ==================== 主内容区 ==================== */
.main-wrapper {
    flex: 1;
    margin-left: var(--sidebar-width);
    display: flex;
    flex-direction: column;
    min-height: 100vh;
    transition: var(--transition);
}

.sidebar.collapsed ~ .main-wrapper {
    margin-left: var(--sidebar-collapsed-width);
}

/* ==================== 顶部导航 ==================== */
.top-header {
    height: var(--header-height);
    background: var(--card-bg);
    border-bottom: 1px solid var(--border-color);
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0 24px;
    position: sticky;
    top: 0;
    z-index: 100;
}

.header-left {
    display: flex;
    align-items: center;
    gap: 16px;
}

.sidebar-toggle {
    background: none;
    border: none;
    font-size: 18px;
    color: var(--text-secondary);
    cursor: pointer;
    padding: 8px;
    border-radius: var(--radius-md);
    transition: var(--transition);
}

.sidebar-toggle:hover {
    background: var(--bg-color);
    color: var(--text-primary);
}

.search-box {
    position: relative;
    width: 320px;
}

.search-box i {
    position: absolute;
    left: 12px;
    top: 50%;
    transform: translateY(-50%);
    color: var(--text-muted);
}

.search-box input {
    width: 100%;
    padding: 8px 12px 8px 36px;
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    background: var(--bg-color);
    font-size: 14px;
    transition: var(--transition);
}

.search-box input:focus {
    outline: none;
    border-color: var(--primary-color);
    background: #fff;
}

.header-right {
    display: flex;
    align-items: center;
    gap: 16px;
}

.header-icon-btn {
    position: relative;
    background: none;
    border: none;
    font-size: 18px;
    color: var(--text-secondary);
    cursor: pointer;
    padding: 8px;
    border-radius: var(--radius-md);
    transition: var(--transition);
}

.header-icon-btn:hover {
    background: var(--bg-color);
    color: var(--text-primary);
}

.header-icon-btn .badge {
    position: absolute;
    top: 2px;
    right: 2px;
    min-width: 18px;
    height: 18px;
    padding: 0 5px;
    font-size: 11px;
    line-height: 18px;
    text-align: center;
    background: var(--danger-color);
    color: #fff;
    border-radius: 9px;
}

.user-btn {
    display: flex;
    align-items: center;
    gap: 8px;
    background: none;
    border: none;
    cursor: pointer;
    padding: 4px 8px;
    border-radius: var(--radius-md);
    transition: var(--transition);
}

.user-btn:hover {
    background: var(--bg-color);
}

.user-avatar {
    width: 32px;
    height: 32px;
    border-radius: 50%;
    background: var(--primary-color);
    display: flex;
    align-items: center;
    justify-content: center;
    color: #fff;
}

.user-name {
    font-size: 14px;
    color: var(--text-primary);
}

/* ==================== 通知下拉 ==================== */
.notification-dropdown {
    width: 360px;
    padding: 0;
}

.notification-dropdown .dropdown-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 12px 16px;
    border-bottom: 1px solid var(--border-color);
}

.notification-dropdown .dropdown-header span {
    font-weight: 600;
}

.notification-dropdown .dropdown-header a {
    font-size: 13px;
    color: var(--primary-color);
}

.notification-dropdown .dropdown-item {
    display: flex;
    align-items: flex-start;
    padding: 12px 16px;
    border-bottom: 1px solid var(--border-light);
}

.notification-dropdown .dropdown-item:hover {
    background: var(--bg-color);
}

.notification-icon {
    width: 32px;
    height: 32px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: #fff;
    margin-right: 12px;
    flex-shrink: 0;
}

.notification-content p {
    margin: 0 0 4px;
    font-size: 14px;
    color: var(--text-primary);
}

.notification-content span {
    font-size: 12px;
    color: var(--text-secondary);
}

.dropdown-footer {
    text-align: center;
    padding: 12px;
    border-top: 1px solid var(--border-color);
}

/* ==================== 页面内容 ==================== */
.main-content {
    flex: 1;
    padding: 24px;
}

/* ==================== 页脚 ==================== */
.main-footer {
    height: var(--footer-height);
    background: var(--card-bg);
    border-top: 1px solid var(--border-color);
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0 24px;
    font-size: 13px;
    color: var(--text-secondary);
}

.footer-right a {
    color: var(--text-secondary);
}

.footer-right .divider {
    margin: 0 8px;
    color: var(--border-color);
}

/* ==================== 卡片 ==================== */
.card {
    background: var(--card-bg);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-sm);
    border: none;
}

.card-header {
    padding: 16px 24px;
    border-bottom: 1px solid var(--border-color);
    background: transparent;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.card-title {
    font-size: 16px;
    font-weight: 600;
    margin: 0;
    color: var(--text-primary);
}

.card-body {
    padding: 24px;
}

.card-footer {
    padding: 16px 24px;
    border-top: 1px solid var(--border-color);
    background: var(--bg-color);
    border-radius: 0 0 var(--radius-lg) var(--radius-lg);
}

/* ==================== 统计卡片 ==================== */
.stat-card {
    background: var(--card-bg);
    border-radius: var(--radius-lg);
    padding: 20px;
    box-shadow: var(--shadow-sm);
    transition: var(--transition);
}

.stat-card:hover {
    box-shadow: var(--shadow-md);
    transform: translateY(-2px);
}

.stat-card-icon {
    width: 48px;
    height: 48px;
    border-radius: var(--radius-lg);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 22px;
    margin-bottom: 16px;
}

.stat-card-icon.blue { background: rgba(24, 144, 255, 0.1); color: var(--primary-color); }
.stat-card-icon.green { background: rgba(82, 196, 26, 0.1); color: var(--success-color); }
.stat-card-icon.orange { background: rgba(250, 173, 20, 0.1); color: var(--warning-color); }
.stat-card-icon.red { background: rgba(245, 34, 45, 0.1); color: var(--danger-color); }
.stat-card-icon.purple { background: rgba(114, 46, 209, 0.1); color: var(--purple-color); }

.stat-value {
    font-size: 28px;
    font-weight: 700;
    color: var(--text-primary);
    line-height: 1.2;
}

.stat-label {
    font-size: 14px;
    color: var(--text-secondary);
    margin-top: 4px;
}

.stat-trend {
    display: flex;
    align-items: center;
    gap: 4px;
    font-size: 13px;
    margin-top: 8px;
}

.stat-trend.up { color: var(--success-color); }
.stat-trend.down { color: var(--danger-color); }

/* ==================== 按钮 ==================== */
.btn {
    font-weight: 500;
    padding: 8px 16px;
    border-radius: var(--radius-md);
    transition: var(--transition);
    display: inline-flex;
    align-items: center;
    gap: 6px;
}

.btn-primary {
    background: var(--primary-color);
    border-color: var(--primary-color);
}

.btn-primary:hover {
    background: var(--primary-dark);
    border-color: var(--primary-dark);
}

.btn-outline-primary {
    color: var(--primary-color);
    border-color: var(--primary-color);
}

.btn-outline-primary:hover {
    background: var(--primary-color);
    border-color: var(--primary-color);
}

.btn-sm {
    padding: 4px 12px;
    font-size: 13px;
}

.btn-icon {
    width: 32px;
    height: 32px;
    padding: 0;
    display: inline-flex;
    align-items: center;
    justify-content: center;
}

/* ==================== 表格 ==================== */
.table {
    margin-bottom: 0;
}

.table thead th {
    background: var(--bg-color);
    font-weight: 600;
    color: var(--text-secondary);
    border-bottom: 1px solid var(--border-color);
    padding: 12px 16px;
    font-size: 13px;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.table tbody td {
    padding: 14px 16px;
    vertical-align: middle;
    border-bottom: 1px solid var(--border-light);
}

.table tbody tr:hover {
    background: rgba(24, 144, 255, 0.02);
}

.table-actions {
    display: flex;
    gap: 8px;
}

/* ==================== 状态标签 ==================== */
.status-badge {
    display: inline-flex;
    align-items: center;
    padding: 4px 10px;
    font-size: 12px;
    font-weight: 500;
    border-radius: 20px;
}

.status-pending { background: #F0F0F0; color: #8C8C8C; }
.status-processing { background: #E6F7FF; color: var(--primary-color); }
.status-completed { background: #F6FFED; color: var(--success-color); }
.status-failed { background: #FFF1F0; color: var(--danger-color); }
.status-success { background: #F6FFED; color: var(--success-color); }
.status-info { background: #E6F7FF; color: var(--primary-color); }
.status-warning { background: #FFFBE6; color: var(--warning-color); }

/* ==================== 工具卡片网格 ==================== */
.tools-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(180px, 1fr));
    gap: 16px;
}

.tool-card {
    background: var(--bg-color);
    border-radius: var(--radius-lg);
    padding: 20px;
    text-align: center;
    cursor: pointer;
    transition: var(--transition);
    border: 1px solid transparent;
}

.tool-card:hover {
    background: #fff;
    border-color: var(--primary-color);
    box-shadow: var(--shadow-md);
    transform: translateY(-2px);
}

.tool-card-icon {
    width: 56px;
    height: 56px;
    border-radius: var(--radius-lg);
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 12px;
    font-size: 24px;
}

.tool-card-title {
    font-size: 14px;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 4px;
}

.tool-card-desc {
    font-size: 12px;
    color: var(--text-secondary);
}

/* ==================== 表单 ==================== */
.form-label {
    font-weight: 500;
    color: var(--text-primary);
    margin-bottom: 6px;
}

.form-control {
    border-radius: var(--radius-md);
    padding: 8px 12px;
    border: 1px solid var(--border-color);
    transition: var(--transition);
}

.form-control:focus {
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(24, 144, 255, 0.1);
}

.form-select {
    border-radius: var(--radius-md);
    padding: 8px 12px;
    border: 1px solid var(--border-color);
}

/* ==================== 上传区域 ==================== */
.upload-zone {
    border: 2px dashed var(--border-color);
    border-radius: var(--radius-lg);
    padding: 48px;
    text-align: center;
    background: var(--bg-color);
    transition: var(--transition);
    cursor: pointer;
}

.upload-zone:hover,
.upload-zone.dragover {
    border-color: var(--primary-color);
    background: rgba(24, 144, 255, 0.02);
}

.upload-zone-icon {
    font-size: 48px;
    color: var(--primary-color);
    margin-bottom: 16px;
}

.upload-zone-text {
    font-size: 16px;
    color: var(--text-primary);
    margin-bottom: 8px;
}

.upload-zone-hint {
    font-size: 13px;
    color: var(--text-secondary);
}

/* ==================== 文件列表 ==================== */
.file-list {
    margin-top: 20px;
}

.file-item {
    display: flex;
    align-items: center;
    padding: 12px 16px;
    background: var(--bg-color);
    border-radius: var(--radius-md);
    margin-bottom: 8px;
}

.file-item-icon {
    width: 40px;
    height: 40px;
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    margin-right: 12px;
    font-size: 18px;
}

.file-item-info {
    flex: 1;
}

.file-item-name {
    font-size: 14px;
    font-weight: 500;
    color: var(--text-primary);
    margin-bottom: 2px;
}

.file-item-meta {
    font-size: 12px;
    color: var(--text-secondary);
}

/* ==================== 进度条 ==================== */
.progress {
    height: 8px;
    border-radius: 4px;
    background: var(--bg-color);
}

.progress-bar {
    border-radius: 4px;
}

/* ==================== 分页 ==================== */
.pagination {
    margin: 0;
    gap: 4px;
    display: flex;
    flex-wrap: wrap;
}

.page-item {
    margin: 0 2px;
}

.page-link {
    border-radius: var(--radius-md);
    padding: 6px 12px;
    color: var(--text-primary);
    border: 1px solid var(--border-color);
    background: #fff;
    transition: var(--transition);
    display: flex;
    align-items: center;
    justify-content: center;
    min-width: 36px;
}

.page-link:hover {
    background: var(--bg-color);
    border-color: var(--primary-color);
    color: var(--primary-color);
    z-index: 1;
}

.page-link:focus {
    box-shadow: 0 0 0 3px rgba(24, 144, 255, 0.1);
    outline: none;
}

.page-item.active .page-link {
    background: var(--primary-color);
    border-color: var(--primary-color);
    color: #fff;
    z-index: 2;
}

.page-item.disabled .page-link {
    color: var(--text-muted);
    background: var(--bg-color);
    border-color: var(--border-color);
    pointer-events: none;
    cursor: not-allowed;
}

.page-link i {
    font-size: 12px;
}

.page-item:first-child .page-link,
.page-item:last-child .page-link {
    border-radius: var(--radius-md);
}

/* Bootstrap 5 分页图标支持 */
.page-link .fas,
.page-link .fa {
    font-size: 12px;
}

/* 分页信息 */
.pagination-info {
    color: var(--text-secondary);
    font-size: 14px;
    display: flex;
    align-items: center;
}

/* 分页容器增强 */
.pagination-wrapper {
    display: flex;
    align-items: center;
    justify-content: space-between;
    flex-wrap: wrap;
    gap: 12px;
}

.pagination-wrapper .pagination {
    margin: 0;
}

/* 数字页码样式 */
.page-pagination-info {
    color: var(--text-secondary);
    font-size: 14px;
    margin: 0 8px;
    display: flex;
    align-items: center;
}

/* ==================== 模态框 ==================== */
.modal-header {
    border-bottom: 1px solid var(--border-color);
    padding: 16px 24px;
}

.modal-title {
    font-weight: 600;
}

.modal-body {
    padding: 24px;
}

.modal-footer {
    border-top: 1px solid var(--border-color);
    padding: 16px 24px;
}

/* ==================== 下拉菜单 ==================== */
.dropdown-menu {
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-lg);
    border: 1px solid var(--border-color);
    padding: 8px;
}

.dropdown-item {
    border-radius: var(--radius-md);
    padding: 8px 12px;
    font-size: 14px;
    color: var(--text-primary);
}

.dropdown-item:hover {
    background: var(--bg-color);
    color: var(--text-primary);
}

.dropdown-item.text-danger:hover {
    background: #FFF1F0;
    color: var(--danger-color);
}

/* ==================== 空状态 ==================== */
.empty-state {
    text-align: center;
    padding: 48px 24px;
}

.empty-state-icon {
    font-size: 64px;
    color: var(--text-muted);
    margin-bottom: 16px;
}

.empty-state-title {
    font-size: 16px;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 8px;
}

.empty-state-desc {
    font-size: 14px;
    color: var(--text-secondary);
}

/* ==================== 辅助类 ==================== */
.text-primary { color: var(--text-primary) !important; }
.text-secondary { color: var(--text-secondary) !important; }
.text-muted { color: var(--text-muted) !important; }
.text-success { color: var(--success-color) !important; }
.text-warning { color: var(--warning-color) !important; }
.text-danger { color: var(--danger-color) !important; }

.bg-primary-light { background: rgba(24, 144, 255, 0.1) !important; }
.bg-success-light { background: rgba(82, 196, 26, 0.1) !important; }
.bg-warning-light { background: rgba(250, 173, 20, 0.1) !important; }
.bg-danger-light { background: rgba(245, 34, 45, 0.1) !important; }

.gap-1 { gap: 4px !important; }
.gap-2 { gap: 8px !important; }
.gap-3 { gap: 12px !important; }
.gap-4 { gap: 16px !important; }

/* ==================== 响应式 ==================== */
@media (max-width: 1200px) {
    .tools-grid {
        grid-template-columns: repeat(3, 1fr);
    }
}

@media (max-width: 992px) {
    .sidebar {
        transform: translateX(-100%);
    }

    .sidebar.active {
        transform: translateX(0);
    }

    .main-wrapper {
        margin-left: 0;
    }

    .search-box {
        width: 240px;
    }

    .tools-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 768px) {
    .main-content {
        padding: 16px;
    }

    .search-box {
        display: none;
    }

    .tools-grid {
        grid-template-columns: 1fr;
    }
}

/* ==================== Toast 通知 ==================== */
.toast-notification {
    position: fixed;
    top: 80px;
    right: 24px;
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 12px 20px;
    border-radius: var(--radius-lg);
    background: #fff;
    box-shadow: var(--shadow-lg);
    z-index: 9999;
    opacity: 0;
    transform: translateX(100px);
    transition: all 0.3s ease;
}

.toast-notification.show {
    opacity: 1;
    transform: translateX(0);
}

.toast-notification i {
    font-size: 18px;
}

.toast-notification span {
    font-size: 14px;
    font-weight: 500;
}

.toast-success {
    border-left: 4px solid var(--success-color);
}

.toast-success i {
    color: var(--success-color);
}

.toast-error {
    border-left: 4px solid var(--danger-color);
}

.toast-error i {
    color: var(--danger-color);
}

.toast-warning {
    border-left: 4px solid var(--warning-color);
}

.toast-warning i {
    color: var(--warning-color);
}

.toast-info {
    border-left: 4px solid var(--primary-color);
}

.toast-info i {
    color: var(--primary-color);
}

/* ==================== 页面特定样式 ==================== */
.page-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 24px;
}

.page-title {
    font-size: 20px;
    font-weight: 600;
    color: var(--text-primary);
    margin: 0;
}

.page-subtitle {
    font-size: 14px;
    color: var(--text-secondary);
    margin-top: 4px;
}

.quick-actions {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 16px;
}

.quick-action-btn {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: 20px;
    background: var(--bg-color);
    border-radius: var(--radius-lg);
    color: var(--text-primary);
    transition: var(--transition);
    border: 1px solid transparent;
}

.quick-action-btn:hover {
    background: var(--primary-color);
    color: #fff;
    transform: translateY(-2px);
}

.quick-action-btn i {
    font-size: 24px;
    margin-bottom: 8px;
}

.quick-action-btn span {
    font-size: 14px;
    font-weight: 500;
}

/* 任务列表样式 */
.task-list {
    margin-top: 16px;
}

.task-item {
    display: flex;
    align-items: center;
    padding: 16px;
    background: var(--bg-color);
    border-radius: var(--radius-lg);
    margin-bottom: 12px;
    transition: var(--transition);
}

.task-item:hover {
    background: #fff;
    box-shadow: var(--shadow-sm);
}

.task-info {
    flex: 1;
}

.task-name {
    font-size: 14px;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 4px;
}

.task-meta {
    font-size: 12px;
    color: var(--text-secondary);
    display: flex;
    gap: 16px;
}

.task-type {
    display: inline-flex;
    align-items: center;
    gap: 4px;
}

/* 帮助页面样式 */
.help-sidebar {
    position: sticky;
    top: 80px;
}

.help-toc {
    list-style: none;
    padding: 0;
    margin: 0;
}

.help-toc li {
    margin-bottom: 8px;
}

.help-toc a {
    display: block;
    padding: 8px 12px;
    color: var(--text-secondary);
    border-radius: var(--radius-md);
    transition: var(--transition);
}

.help-toc a:hover,
.help-toc a.active {
    color: var(--primary-color);
    background: rgba(24, 144, 255, 0.05);
}

/* FAQ折叠面板 */
.faq-item {
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    margin-bottom: 12px;
    overflow: hidden;
}

.faq-question {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 16px 20px;
    background: var(--card-bg);
    cursor: pointer;
    transition: var(--transition);
}

.faq-question:hover {
    background: var(--bg-color);
}

.faq-question h5 {
    margin: 0;
    font-size: 15px;
    font-weight: 500;
    flex: 1;
    padding-right: 16px;
}

.faq-question i {
    color: var(--text-secondary);
    transition: var(--transition);
}

.faq-item.active .faq-question i {
    transform: rotate(180deg);
}

.faq-answer {
    padding: 0 20px;
    max-height: 0;
    overflow: hidden;
    transition: all 0.3s ease;
}

.faq-item.active .faq-answer {
    padding: 0 20px 16px;
    max-height: 500px;
}

/* 教程卡片 */
.tutorial-card {
    background: var(--card-bg);
    border-radius: var(--radius-lg);
    overflow: hidden;
    box-shadow: var(--shadow-sm);
    transition: var(--transition);
}

.tutorial-card:hover {
    box-shadow: var(--shadow-md);
    transform: translateY(-4px);
}

.tutorial-thumbnail {
    position: relative;
    height: 160px;
    background: linear-gradient(135deg, var(--primary-color), var(--primary-dark));
    display: flex;
    align-items: center;
    justify-content: center;
}

.tutorial-thumbnail i {
    font-size: 48px;
    color: #fff;
    opacity: 0.8;
}

.tutorial-duration {
    position: absolute;
    bottom: 8px;
    right: 8px;
    background: rgba(0,0,0,0.6);
    color: #fff;
    padding: 2px 8px;
    border-radius: var(--radius-sm);
    font-size: 12px;
}

.tutorial-body {
    padding: 16px;
}

.tutorial-title {
    font-size: 15px;
    font-weight: 600;
    margin-bottom: 8px;
    color: var(--text-primary);
}

.tutorial-desc {
    font-size: 13px;
    color: var(--text-secondary);
    margin-bottom: 12px;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.tutorial-meta {
    display: flex;
    align-items: center;
    justify-content: space-between;
    font-size: 12px;
    color: var(--text-secondary);
}

.tutorial-category {
    background: var(--bg-color);
    padding: 2px 8px;
    border-radius: var(--radius-sm);
}