/* 管理后台样式 - 参考图片风格 */

:root {
    --primary: #6366f1;
    --primary-light: #818cf8;
    --primary-dark: #4f46e5;
    --success: #10b981;
    --warning: #f59e0b;
    --danger: #ef4444;
    --info: #3b82f6;
    --bg-page: #f1f5f9;
    --bg-card: #ffffff;
    --text-primary: #1e293b;
    --text-secondary: #64748b;
    --text-muted: #94a3b8;
    --border: #e2e8f0;
    --sidebar-bg: #1e293b;
    --sidebar-width: 240px;
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'PingFang SC', sans-serif;
    background: var(--bg-page);
    color: var(--text-primary);
    font-size: 14px;
    line-height: 1.5;
}

/* 登录页 */
.login-page {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 100%);
}

.login-box {
    background: var(--bg-card);
    padding: 48px 40px;
    border-radius: 16px;
    box-shadow: 0 20px 60px rgba(0,0,0,0.2);
    width: 100%;
    max-width: 400px;
}

.login-logo {
    text-align: center;
    margin-bottom: 32px;
}

.login-logo h2 {
    font-size: 24px;
    color: var(--primary);
    margin-bottom: 4px;
}

.login-logo p {
    color: var(--text-muted);
    font-size: 14px;
}

.login-form .form-group {
    margin-bottom: 20px;
}

.login-form input {
    width: 100%;
    padding: 12px 16px;
    border: 1px solid var(--border);
    border-radius: 8px;
    font-size: 14px;
    transition: border-color 0.2s;
}

.login-form input:focus {
    outline: none;
    border-color: var(--primary);
}

.login-btn {
    width: 100%;
    padding: 12px;
    background: linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 100%);
    color: white;
    border: none;
    border-radius: 8px;
    font-size: 16px;
    font-weight: 500;
    cursor: pointer;
    transition: opacity 0.2s;
}

.login-btn:hover {
    opacity: 0.9;
}

/* 布局 */
.admin-layout {
    display: flex;
    min-height: 100vh;
}

/* 侧边栏 */
.sidebar {
    width: var(--sidebar-width);
    background: var(--sidebar-bg);
    color: white;
    position: fixed;
    height: 100vh;
    overflow-y: auto;
}

.sidebar-header {
    padding: 24px;
    border-bottom: 1px solid rgba(255,255,255,0.1);
}

.sidebar-header h3 {
    font-size: 18px;
    font-weight: 600;
}

.sidebar-header p {
    font-size: 12px;
    color: rgba(255,255,255,0.6);
    margin-top: 4px;
}

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

.nav-item {
    display: flex;
    align-items: center;
    padding: 12px 24px;
    color: rgba(255,255,255,0.7);
    text-decoration: none;
    transition: all 0.2s;
    gap: 12px;
}

.nav-item:hover {
    background: rgba(255,255,255,0.05);
    color: white;
}

.nav-item.active {
    background: var(--primary);
    color: white;
}

.nav-icon {
    font-size: 18px;
    width: 24px;
    text-align: center;
}

/* 主内容区 */
.main-content {
    flex: 1;
    margin-left: var(--sidebar-width);
    min-height: 100vh;
}

.top-bar {
    background: var(--bg-card);
    padding: 16px 32px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    border-bottom: 1px solid var(--border);
    position: sticky;
    top: 0;
    z-index: 10;
}

.top-bar h1 {
    font-size: 20px;
    font-weight: 600;
}

.user-info {
    display: flex;
    align-items: center;
    gap: 16px;
}

.logout-btn {
    color: var(--danger);
    text-decoration: none;
    font-size: 14px;
}

.content-body {
    padding: 24px 32px;
}

/* 统计卡片 */
.stats-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 24px;
    margin-bottom: 24px;
}

.stat-card {
    background: var(--bg-card);
    border-radius: 12px;
    padding: 24px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    box-shadow: 0 1px 3px rgba(0,0,0,0.08);
}

.stat-card.purple { background: linear-gradient(135deg, #6366f1 0%, #8b5cf6 100%); color: white; }
.stat-card.blue { background: linear-gradient(135deg, #3b82f6 0%, #06b6d4 100%); color: white; }
.stat-card.green { background: linear-gradient(135deg, #10b981 0%, #14b8a6 100%); color: white; }
.stat-card.orange { background: linear-gradient(135deg, #f59e0b 0%, #f97316 100%); color: white; }

.stat-info h3 {
    font-size: 14px;
    opacity: 0.9;
    margin-bottom: 8px;
    font-weight: 400;
}

.stat-number {
    font-size: 28px;
    font-weight: 700;
}

.stat-icon {
    font-size: 36px;
    opacity: 0.3;
}

/* 快捷操作 */
.quick-actions {
    background: var(--bg-card);
    border-radius: 12px;
    padding: 24px;
    margin-bottom: 24px;
    box-shadow: 0 1px 3px rgba(0,0,0,0.08);
}

.quick-actions h3 {
    font-size: 16px;
    margin-bottom: 16px;
}

.action-buttons {
    display: flex;
    gap: 12px;
    flex-wrap: wrap;
}

.action-btn {
    padding: 10px 20px;
    background: var(--bg-page);
    border: 1px solid var(--border);
    border-radius: 8px;
    text-decoration: none;
    color: var(--text-primary);
    font-size: 14px;
    transition: all 0.2s;
}

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

/* 图表 */
.chart-section {
    background: var(--bg-card);
    border-radius: 12px;
    padding: 24px;
    margin-bottom: 24px;
    box-shadow: 0 1px 3px rgba(0,0,0,0.08);
}

.chart-section h3 {
    font-size: 16px;
    margin-bottom: 20px;
}

.trend-chart {
    display: flex;
    align-items: flex-end;
    justify-content: space-around;
    height: 150px;
    padding: 20px 0;
    gap: 16px;
}

.chart-bar {
    flex: 1;
    background: linear-gradient(to top, var(--primary), var(--primary-light));
    border-radius: 4px 4px 0 0;
    min-height: 10px;
    position: relative;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: flex-end;
    padding-bottom: 4px;
}

.bar-value {
    position: absolute;
    top: -20px;
    font-size: 12px;
    color: var(--text-secondary);
}

.bar-label {
    font-size: 12px;
    color: var(--text-muted);
    margin-top: 8px;
}

/* 表格 */
.table-section {
    background: var(--bg-card);
    border-radius: 12px;
    padding: 24px;
    box-shadow: 0 1px 3px rgba(0,0,0,0.08);
}

.table-section h3 {
    font-size: 16px;
    margin-bottom: 20px;
}

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

.data-table th,
.data-table td {
    padding: 12px 16px;
    text-align: left;
    border-bottom: 1px solid var(--border);
}

.data-table th {
    font-weight: 600;
    color: var(--text-secondary);
    font-size: 13px;
    background: var(--bg-page);
}

.data-table tr:hover {
    background: var(--bg-page);
}

.ellipsis {
    max-width: 200px;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

/* 徽章 */
.badge {
    display: inline-block;
    padding: 4px 10px;
    border-radius: 4px;
    font-size: 12px;
    font-weight: 500;
}

.badge.success {
    background: rgba(16, 185, 129, 0.1);
    color: var(--success);
}

.badge.danger {
    background: rgba(239, 68, 68, 0.1);
    color: var(--danger);
}

/* 分页 */
.pagination {
    display: flex;
    gap: 8px;
    margin-top: 24px;
    justify-content: center;
}

.page-btn {
    padding: 8px 14px;
    border: 1px solid var(--border);
    border-radius: 6px;
    text-decoration: none;
    color: var(--text-primary);
    transition: all 0.2s;
}

.page-btn:hover,
.page-btn.active {
    background: var(--primary);
    color: white;
    border-color: var(--primary);
}

/* 搜索 */
.filter-bar {
    margin-bottom: 20px;
}

.search-form {
    display: flex;
    gap: 12px;
}

.search-form input {
    flex: 1;
    max-width: 300px;
    padding: 10px 16px;
    border: 1px solid var(--border);
    border-radius: 8px;
    font-size: 14px;
}

.search-form button {
    padding: 10px 20px;
    background: var(--primary);
    color: white;
    border: none;
    border-radius: 8px;
    cursor: pointer;
}

/* 链接按钮 */
.link-btn {
    color: var(--primary);
    text-decoration: none;
    font-size: 13px;
}

.link-btn:hover {
    text-decoration: underline;
}

/* 设置表单 */
.settings-form {
    background: var(--bg-card);
    border-radius: 12px;
    padding: 32px;
    box-shadow: 0 1px 3px rgba(0,0,0,0.08);
    max-width: 600px;
}

.form-section {
    margin-bottom: 32px;
}

.form-section h3 {
    font-size: 16px;
    margin-bottom: 20px;
    padding-bottom: 12px;
    border-bottom: 1px solid var(--border);
}

.form-group {
    margin-bottom: 20px;
}

.form-group label {
    display: block;
    margin-bottom: 8px;
    font-weight: 500;
    color: var(--text-secondary);
    font-size: 14px;
}

.form-group input,
.form-group textarea,
.form-group select {
    width: 100%;
    padding: 10px 14px;
    border: 1px solid var(--border);
    border-radius: 8px;
    font-size: 14px;
    transition: border-color 0.2s;
}

.form-group input:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--primary);
}

.save-btn {
    padding: 12px 32px;
    background: linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 100%);
    color: white;
    border: none;
    border-radius: 8px;
    font-size: 15px;
    font-weight: 500;
    cursor: pointer;
    transition: opacity 0.2s;
}

.save-btn:hover {
    opacity: 0.9;
}

/* 响应式 */
@media (max-width: 1024px) {
    .stats-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 768px) {
    .sidebar {
        transform: translateX(-100%);
    }
    .main-content {
        margin-left: 0;
    }
    .stats-grid {
        grid-template-columns: 1fr;
    }
}