/* 管理后台样式 */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Roboto', 'Helvetica Neue', Arial, sans-serif;
    background: #f5f7fa;
    color: #333;
}

.container {
    display: flex;
    flex-direction: column;
    min-height: 100vh;
}

/* 顶部导航 */
.header {
    background: linear-gradient(135deg, #1E90FF 0%, #4A90E2 100%);
    color: #fff;
    padding: 20px 30px;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
}

.header-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.header h1 {
    font-size: 24px;
    font-weight: bold;
}

.header-stats {
    display: flex;
    gap: 30px;
}

.stat-item {
    display: flex;
    flex-direction: column;
    align-items: center;
}

.stat-label {
    font-size: 12px;
    opacity: 0.9;
    margin-bottom: 5px;
}

.stat-value {
    font-size: 24px;
    font-weight: bold;
}

/* 主要内容区 */
.main-content {
    display: flex;
    flex: 1;
}

/* 侧边栏 */
.sidebar {
    width: 250px;
    background: #fff;
    box-shadow: 2px 0 10px rgba(0, 0, 0, 0.05);
    padding: 20px 0;
}

.nav-menu {
    display: flex;
    flex-direction: column;
}

.nav-item {
    display: flex;
    align-items: center;
    padding: 15px 25px;
    color: #666;
    text-decoration: none;
    transition: all 0.3s;
    border-left: 3px solid transparent;
}

.nav-item:hover {
    background: #f8f9fa;
    color: #1E90FF;
}

.nav-item.active {
    background: #E6F3FF;
    color: #1E90FF;
    border-left-color: #1E90FF;
    font-weight: 500;
}

.nav-icon {
    font-size: 20px;
    margin-right: 12px;
    width: 24px;
    text-align: center;
}

.nav-text {
    font-size: 14px;
}

/* 内容区 */
.content-area {
    flex: 1;
    padding: 30px;
    overflow-y: auto;
}

.page {
    display: none;
}

.page.active {
    display: block;
}

.page-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 30px;
}

.page-header h2 {
    font-size: 28px;
    font-weight: bold;
    color: #333;
}

/* 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: #fff;
    border-radius: 12px;
    padding: 25px;
    display: flex;
    align-items: center;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.05);
    transition: transform 0.3s;
}

.stat-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.1);
}

.stat-icon {
    font-size: 48px;
    margin-right: 20px;
}

.stat-info {
    flex: 1;
}

.stat-title {
    font-size: 14px;
    color: #999;
    margin-bottom: 8px;
}

.stat-number {
    font-size: 32px;
    font-weight: bold;
    color: #1E90FF;
}

/* 按钮 */
.btn-primary {
    background: linear-gradient(135deg, #1E90FF 0%, #4A90E2 100%);
    color: #fff;
    border: none;
    border-radius: 6px;
    padding: 10px 20px;
    font-size: 14px;
    cursor: pointer;
    transition: all 0.3s;
}

.btn-primary:hover {
    opacity: 0.9;
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(30, 144, 255, 0.3);
}

.btn-secondary {
    background: #f0f0f0;
    color: #666;
    border: none;
    border-radius: 6px;
    padding: 10px 20px;
    font-size: 14px;
    cursor: pointer;
    transition: all 0.3s;
}

.btn-secondary:hover {
    background: #e0e0e0;
}

/* 筛选栏 */
.filter-bar {
    display: flex;
    gap: 15px;
    margin-bottom: 20px;
    align-items: center;
}

.filter-select,
.search-input {
    padding: 10px 15px;
    border: 1px solid #ddd;
    border-radius: 6px;
    font-size: 14px;
}

.search-input {
    flex: 1;
    min-width: 200px;
}

/* 表格 */
.table-container {
    background: #fff;
    border-radius: 12px;
    overflow: hidden;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.05);
}

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

.data-table thead {
    background: #f8f9fa;
}

.data-table th {
    padding: 15px;
    text-align: left;
    font-weight: 600;
    color: #333;
    border-bottom: 2px solid #e0e0e0;
}

.data-table td {
    padding: 15px;
    border-bottom: 1px solid #f0f0f0;
}

.data-table tbody tr:hover {
    background: #f8f9fa;
}

.data-table .loading {
    text-align: center;
    color: #999;
    padding: 40px;
}

/* 导入卡片 */
.import-card {
    background: #fff;
    border-radius: 12px;
    padding: 30px;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.05);
}

.import-card h3 {
    margin-bottom: 20px;
    color: #333;
}

.import-form {
    display: flex;
    flex-direction: column;
    gap: 20px;
}

.form-group {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.form-group label {
    font-size: 14px;
    font-weight: 500;
    color: #666;
}

.form-input,
.form-select {
    padding: 12px 15px;
    border: 1px solid #ddd;
    border-radius: 6px;
    font-size: 14px;
}

.form-input:focus,
.form-select:focus {
    outline: none;
    border-color: #1E90FF;
}

/* 进度条 */
.import-progress {
    margin-top: 30px;
    padding: 20px;
    background: #f8f9fa;
    border-radius: 8px;
}

.progress-bar {
    width: 100%;
    height: 30px;
    background: #e0e0e0;
    border-radius: 15px;
    overflow: hidden;
    margin-bottom: 10px;
}

.progress-fill {
    height: 100%;
    background: linear-gradient(90deg, #1E90FF 0%, #4A90E2 100%);
    transition: width 0.3s;
    width: 0%;
}

.progress-text {
    text-align: center;
    color: #666;
    font-size: 14px;
}

/* 分页 */
.pagination {
    display: flex;
    justify-content: center;
    gap: 10px;
    margin-top: 20px;
}

.pagination button {
    padding: 8px 15px;
    border: 1px solid #ddd;
    background: #fff;
    border-radius: 6px;
    cursor: pointer;
    transition: all 0.3s;
}

.pagination button:hover {
    background: #f0f0f0;
}

.pagination button.active {
    background: #1E90FF;
    color: #fff;
    border-color: #1E90FF;
}

/* 图表容器 */
.charts-container {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(400px, 1fr));
    gap: 20px;
}

.chart-card {
    background: #fff;
    border-radius: 12px;
    padding: 25px;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.05);
}

.chart-card h3 {
    margin-bottom: 20px;
    color: #333;
}

/* 文件上传区域 */
.file-upload-area {
    margin-bottom: 20px;
}

.file-upload-box {
    border: 2px dashed #ddd;
    border-radius: 8px;
    padding: 40px;
    text-align: center;
    cursor: pointer;
    transition: all 0.3s;
    background: #fafafa;
}

.file-upload-box:hover {
    border-color: #1E90FF;
    background: #f0f7ff;
}

.file-upload-box.drag-over {
    border-color: #1E90FF;
    background: #e6f3ff;
}

.file-upload-box.file-selected {
    border-color: #4CAF50;
    background: #f1f8f4;
}

.file-upload-icon {
    font-size: 48px;
    margin-bottom: 15px;
}

.file-upload-text {
    display: flex;
    flex-direction: column;
    gap: 5px;
}

.file-upload-text span:first-child {
    font-size: 16px;
    color: #333;
    font-weight: 500;
}

.file-upload-hint {
    font-size: 12px;
    color: #999;
}

/* 导入结果 */
.import-result {
    margin-top: 20px;
    padding: 20px;
    border-radius: 8px;
}

.import-result.success {
    background: #f1f8f4;
    border: 1px solid #4CAF50;
}

.import-result.error {
    background: #fff5f5;
    border: 1px solid #f44336;
}

.import-result h4 {
    margin-bottom: 15px;
    font-size: 18px;
}

.result-stats {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 15px;
    margin-top: 15px;
}

.result-item {
    display: flex;
    justify-content: space-between;
    padding: 10px;
    background: #fff;
    border-radius: 6px;
}

.result-label {
    color: #666;
    font-size: 14px;
}

.result-value {
    font-weight: bold;
    font-size: 16px;
}

.result-value.success {
    color: #4CAF50;
}

.result-value.skip {
    color: #FF9800;
}

.result-value.error {
    color: #f44336;
}

/* 导入提示 */
.import-tips {
    margin-top: 30px;
    background: #fff;
    border-radius: 12px;
    padding: 25px;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.05);
}

.import-tips h4 {
    margin-bottom: 15px;
    color: #333;
}

.import-tips ul {
    list-style: none;
    padding-left: 0;
}

.import-tips li {
    padding: 8px 0;
    color: #666;
    border-bottom: 1px solid #f0f0f0;
}

.import-tips li:last-child {
    border-bottom: none;
}

.import-tips code {
    background: #f5f5f5;
    padding: 2px 6px;
    border-radius: 4px;
    font-size: 12px;
    color: #1E90FF;
}

.btn-primary:disabled {
    opacity: 0.5;
    cursor: not-allowed;
    transform: none;
}

/* 响应式 */
@media (max-width: 768px) {
    .main-content {
        flex-direction: column;
    }
    
    .sidebar {
        width: 100%;
    }
    
    .nav-menu {
        flex-direction: row;
        overflow-x: auto;
    }
}