/* Web端样式 */
body {
    background-color: #f5f5f5;
}

/* 侧边栏 */
.sidebar {
    position: fixed;
    left: 0;
    top: 0;
    bottom: 0;
    width: 250px;
    background: linear-gradient(180deg, #1f2937 0%, #111827 100%);
    color: white;
    overflow-y: auto;
    z-index: 100;
}

.sidebar-header {
    padding: 25px 20px;
    border-bottom: 1px solid rgba(255,255,255,0.1);
}

.sidebar-title {
    font-size: 18px;
    font-weight: 600;
    margin-bottom: 5px;
}

.sidebar-subtitle {
    font-size: 12px;
    color: rgba(255,255,255,0.6);
}

.sidebar-menu {
    padding: 20px 0;
}

.menu-item {
    padding: 12px 20px;
    color: rgba(255,255,255,0.8);
    text-decoration: none;
    display: flex;
    align-items: center;
    transition: all 0.3s;
    cursor: pointer;
}

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

.menu-item.active {
    background-color: rgba(102, 126, 234, 0.3);
    color: white;
    border-left: 3px solid #667eea;
}

.menu-icon {
    margin-right: 12px;
    font-size: 18px;
}

/* 主内容区 */
.main-content {
    margin-left: 250px;
    min-height: 100vh;
}

/* 顶部栏 */
.top-bar {
    background: white;
    padding: 15px 30px;
    box-shadow: 0 2px 8px rgba(0,0,0,0.05);
    display: flex;
    justify-content: space-between;
    align-items: center;
    position: sticky;
    top: 0;
    z-index: 90;
}

.page-title {
    font-size: 24px;
    font-weight: 600;
    color: #1f2937;
}

.top-bar-actions {
    display: flex;
    gap: 15px;
    align-items: center;
}

.user-info {
    display: flex;
    align-items: center;
    gap: 10px;
}

.user-avatar {
    width: 36px;
    height: 36px;
    border-radius: 50%;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-weight: 600;
}

/* 内容区域 */
.content-area {
    padding: 30px;
}

/* 统计卡片 */
.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 20px;
    margin-bottom: 30px;
}

.stat-card {
    background: white;
    border-radius: 12px;
    padding: 25px;
    box-shadow: 0 2px 8px rgba(0,0,0,0.08);
    position: relative;
    overflow: hidden;
}

.stat-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: linear-gradient(90deg, #667eea 0%, #764ba2 100%);
}

.stat-label {
    font-size: 14px;
    color: #6b7280;
    margin-bottom: 10px;
}

.stat-value {
    font-size: 32px;
    font-weight: 700;
    color: #1f2937;
    margin-bottom: 10px;
}

.stat-change {
    font-size: 12px;
    color: #10b981;
}

.stat-change.negative {
    color: #ef4444;
}

.stat-icon {
    position: absolute;
    right: 20px;
    top: 50%;
    transform: translateY(-50%);
    font-size: 48px;
    opacity: 0.1;
}

/* 表格 */
.table-container {
    background: white;
    border-radius: 12px;
    padding: 20px;
    box-shadow: 0 2px 8px rgba(0,0,0,0.08);
    overflow-x: auto;
}

.data-table {
    width: 100%;
    border-collapse: collapse;
}

.data-table thead {
    background-color: #f9fafb;
}

.data-table th {
    padding: 12px 15px;
    text-align: left;
    font-weight: 600;
    color: #374151;
    font-size: 14px;
    border-bottom: 2px solid #e5e7eb;
}

.data-table td {
    padding: 15px;
    border-bottom: 1px solid #f3f4f6;
    font-size: 14px;
    color: #1f2937;
}

.data-table tbody tr:hover {
    background-color: #f9fafb;
}

.data-table tbody tr:last-child td {
    border-bottom: none;
}

/* 操作按钮 */
.action-btns {
    display: flex;
    gap: 8px;
}

.action-btn {
    padding: 6px 12px;
    border: none;
    border-radius: 4px;
    font-size: 12px;
    cursor: pointer;
    transition: opacity 0.3s;
}

.action-btn:hover {
    opacity: 0.8;
}

.action-btn-primary {
    background-color: #667eea;
    color: white;
}

.action-btn-success {
    background-color: #10b981;
    color: white;
}

.action-btn-danger {
    background-color: #ef4444;
    color: white;
}

/* 搜索栏 */
.search-bar {
    display: flex;
    gap: 15px;
    margin-bottom: 20px;
    flex-wrap: wrap;
}

.search-input {
    flex: 1;
    min-width: 200px;
    padding: 10px 15px;
    border: 1px solid #e5e7eb;
    border-radius: 6px;
    font-size: 14px;
}

.search-input:focus {
    outline: none;
    border-color: #667eea;
}

/* 分页 */
.pagination {
    display: flex;
    justify-content: center;
    gap: 8px;
    margin-top: 20px;
}

.page-btn {
    padding: 8px 12px;
    border: 1px solid #e5e7eb;
    background: white;
    border-radius: 4px;
    cursor: pointer;
    font-size: 14px;
    transition: all 0.3s;
}

.page-btn:hover {
    border-color: #667eea;
    color: #667eea;
}

.page-btn.active {
    background-color: #667eea;
    color: white;
    border-color: #667eea;
}

/* 标签页 */
.tabs {
    display: flex;
    gap: 5px;
    border-bottom: 2px solid #e5e7eb;
    margin-bottom: 20px;
}

.tab {
    padding: 12px 24px;
    background: none;
    border: none;
    color: #6b7280;
    font-size: 14px;
    font-weight: 500;
    cursor: pointer;
    position: relative;
    transition: color 0.3s;
}

.tab:hover {
    color: #667eea;
}

.tab.active {
    color: #667eea;
}

.tab.active::after {
    content: '';
    position: absolute;
    bottom: -2px;
    left: 0;
    right: 0;
    height: 2px;
    background-color: #667eea;
}

/* 进度条 */
.progress-bar {
    width: 100%;
    height: 8px;
    background-color: #e5e7eb;
    border-radius: 4px;
    overflow: hidden;
}

.progress-fill {
    height: 100%;
    background: linear-gradient(90deg, #667eea 0%, #764ba2 100%);
    transition: width 0.3s;
}

/* 响应式 */
@media (max-width: 1024px) {
    .sidebar {
        transform: translateX(-100%);
        transition: transform 0.3s;
    }
    
    .sidebar.active {
        transform: translateX(0);
    }
    
    .main-content {
        margin-left: 0;
    }
    
    .stats-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 768px) {
    .stats-grid {
        grid-template-columns: 1fr;
    }
    
    .content-area {
        padding: 15px;
    }
}