/* ===== PC端管理后台样式 ===== */

/* 整体布局 */
.admin-layout {
    display: flex;
    min-height: 100vh;
    background-color: var(--bg-color);
}

/* 侧边栏样式 */
.sidebar {
    width: 240px;
    background-color: var(--sidebar-bg);
    color: var(--sidebar-text);
    display: flex;
    flex-direction: column;
    position: fixed;
    left: 0;
    top: 0;
    bottom: 0;
    z-index: 1000;
    box-shadow: 2px 0 8px rgba(0,0,0,0.15);
}

.sidebar-logo {
    height: 60px;
    display: flex;
    align-items: center;
    padding: 0 24px;
    font-size: 20px;
    font-weight: 600;
    color: var(--sidebar-text);
    border-bottom: 1px solid rgba(255,255,255,0.1);
}

.sidebar-logo i {
    font-size: 24px;
    margin-right: 12px;
    color: var(--primary-color);
}

.sidebar-menu {
    flex: 1;
    overflow-y: auto;
    padding: 16px 0;
}

.menu-group {
    margin-bottom: 24px;
}

.menu-group-title {
    padding: 8px 24px;
    font-size: 12px;
    color: var(--sidebar-text-muted);
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.menu-item {
    display: flex;
    align-items: center;
    padding: 12px 24px;
    color: var(--sidebar-text-muted);
    cursor: pointer;
    transition: all 0.3s;
    text-decoration: none;
}

.menu-item:hover {
    background-color: rgba(255,255,255,0.08);
    color: var(--sidebar-text);
}

.menu-item.active {
    background-color: var(--primary-color);
    color: var(--sidebar-text);
    position: relative;
}

.menu-item.active::before {
    content: '';
    position: absolute;
    left: 0;
    top: 0;
    bottom: 0;
    width: 3px;
    background-color: var(--sidebar-text);
}

.menu-item i {
    width: 20px;
    margin-right: 12px;
    text-align: center;
}

.menu-item .badge {
    margin-left: auto;
    background-color: var(--error-color);
    color: white;
    padding: 2px 8px;
    border-radius: 10px;
    font-size: 12px;
}

/* 菜单项分组（用于子菜单） */
.menu-item-group {
    position: relative;
}

/* 子菜单容器 */
.submenu {
    padding-left: 40px;
}

/* 子菜单项 */
.submenu-item {
    display: flex;
    align-items: center;
    padding: 10px 16px;
    color: rgba(255, 255, 255, 0.7);
    text-decoration: none;
    transition: all 0.3s;
    font-size: 13px;
    position: relative;
}

.submenu-item:hover {
    background: rgba(255, 255, 255, 0.1);
    color: white;
}

.submenu-item.active {
    background: rgba(255, 255, 255, 0.15);
    color: white;
}

.submenu-item.active::before {
    content: '';
    position: absolute;
    left: 0;
    top: 0;
    bottom: 0;
    width: 2px;
    background-color: var(--sidebar-text);
}

.submenu-item i {
    width: 18px;
    margin-right: 10px;
    text-align: center;
    font-size: 12px;
}

/* 主内容区域 */
.main-content {
    flex: 1;
    margin-left: 240px;
    display: flex;
    flex-direction: column;
    min-height: 100vh;
}

/* 顶部导航栏 */
.top-navbar {
    height: 60px;
    background-color: white;
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0 24px;
    box-shadow: 0 2px 8px rgba(0,0,0,0.08);
    position: sticky;
    top: 0;
    z-index: 999;
}

/* 面包屑导航 */
.breadcrumb {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 14px;
}

.breadcrumb-item {
    color: var(--text-secondary);
}

.breadcrumb-item:last-child {
    color: var(--text-primary);
    font-weight: 500;
}

.breadcrumb-separator {
    color: var(--text-disabled);
}

/* 用户信息区 */
.user-info {
    display: flex;
    align-items: center;
    gap: 16px;
}

.user-avatar {
    width: 32px;
    height: 32px;
    border-radius: 50%;
    background-color: var(--primary-color);
    color: white;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 600;
}

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

.logout-btn {
    color: var(--text-secondary);
    cursor: pointer;
    padding: 8px 12px;
    border-radius: var(--radius-md);
    transition: all 0.3s;
}

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

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

.page-header {
    margin-bottom: 24px;
}

.page-title {
    font-size: 20px;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 8px;
}

.page-description {
    font-size: 14px;
    color: var(--text-secondary);
}

/* 卡片容器 */
.card {
    background-color: white;
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-sm);
    padding: 24px;
    margin-bottom: 16px;
}

.card-header {
    padding-bottom: 16px;
    margin-bottom: 16px;
    border-bottom: 1px solid var(--border-color);
}

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

.card-body {
    padding: 0;
}

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

/* 统计卡片 */
.stat-card {
    background-color: white;
    border-radius: var(--radius-lg);
    padding: 24px;
    box-shadow: var(--shadow-sm);
    transition: all 0.3s;
}

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

.stat-label {
    font-size: 14px;
    color: var(--text-secondary);
    margin-bottom: 8px;
}

.stat-value {
    font-size: 30px;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 8px;
}

.stat-trend {
    font-size: 12px;
    display: flex;
    align-items: center;
    gap: 4px;
}

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

.stat-trend.down {
    color: var(--error-color);
}

/* 网格布局 */
.grid {
    display: grid;
    gap: 16px;
}

.grid-cols-2 { grid-template-columns: repeat(2, 1fr); }
.grid-cols-3 { grid-template-columns: repeat(3, 1fr); }
.grid-cols-4 { grid-template-columns: repeat(4, 1fr); }

/* 操作栏 */
.action-bar {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 16px;
    gap: 16px;
}

.action-bar-left {
    display: flex;
    gap: 8px;
}

.action-bar-right {
    display: flex;
    gap: 8px;
    align-items: center;
}

/* Tab标签页 */
.tabs {
    display: flex;
    border-bottom: 2px solid var(--border-color);
    margin-bottom: 24px;
}

.tab-item {
    padding: 12px 24px;
    cursor: pointer;
    color: var(--text-secondary);
    border-bottom: 2px solid transparent;
    margin-bottom: -2px;
    transition: all 0.3s;
}

.tab-item:hover {
    color: var(--primary-color);
}

.tab-item.active {
    color: var(--primary-color);
    border-bottom-color: var(--primary-color);
}

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

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

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

/* 页脚 */
.page-footer {
    text-align: center;
    padding: 24px;
    color: var(--text-secondary);
    font-size: 12px;
    background-color: white;
    border-top: 1px solid var(--border-color);
}

/* 响应式 */
@media (max-width: 1200px) {
    .sidebar {
        width: 200px;
    }
    
    .main-content {
        margin-left: 200px;
    }
}