/* 后台管理系统样式 */
:root {
    --primary-color: #3498db;
    --primary-dark: #2980b9;
    --success-color: #27ae60;
    --warning-color: #f39c12;
    --danger-color: #e74c3c;
    --dark-bg: #2c3e50;
    --darker-bg: #1a252f;
    --sidebar-width: 160px;
    --header-height: 60px;
    --border-radius: 8px;
    --box-shadow: 0 2px 8px rgba(0, 0, 0, 0.08);
    --transition: all 0.3s ease;
}

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

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, 'PingFang SC', 'Microsoft YaHei', sans-serif;
    background-color: #f0f2f5;
    color: #333;
    line-height: 1.6;
}

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

/* 侧边栏 */
.sidebar {
    width: var(--sidebar-width);
    background: linear-gradient(180deg, #2c3e50 0%, #34495e 100%);
    color: #fff;
    position: fixed;
    height: 100vh;
    overflow-y: auto;
    box-shadow: 2px 0 8px rgba(0, 0, 0, 0.1);
    z-index: 1000;
}

.sidebar::-webkit-scrollbar {
    width: 6px;
}

.sidebar::-webkit-scrollbar-thumb {
    background-color: rgba(255, 255, 255, 0.2);
    border-radius: 3px;
}

.sidebar-header {
    padding: 16px 12px;
    background-color: var(--darker-bg);
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
    text-align: center;
}

.sidebar-header h2 {
    font-size: 16px;
    font-weight: 600;
    letter-spacing: 0.5px;
}

.sidebar-nav {
    padding: 8px 0;
}

.sidebar-nav ul {
    list-style: none;
}

.sidebar-nav li {
    margin: 3px 8px;
}

.sidebar-nav a {
    display: flex;
    align-items: center;
    padding: 10px 12px;
    color: rgba(255, 255, 255, 0.85);
    text-decoration: none;
    transition: var(--transition);
    font-size: 13px;
    border-radius: 6px;
    position: relative;
}

.sidebar-nav a::before {
    content: '';
    position: absolute;
    left: 0;
    top: 50%;
    transform: translateY(-50%);
    width: 3px;
    height: 0;
    background-color: #fff;
    border-radius: 0 2px 2px 0;
    transition: var(--transition);
}

.sidebar-nav a:hover {
    background-color: rgba(255, 255, 255, 0.1);
    color: #fff;
    padding-left: 16px;
}

.sidebar-nav a.active {
    background-color: var(--primary-color);
    color: #fff;
    font-weight: 500;
}

.sidebar-nav a.active::before {
    height: 20px;
}

/* 主内容区 */
.main-content {
    margin-left: var(--sidebar-width);
    flex: 1;
    padding: 24px;
    min-height: 100vh;
}

.content-header {
    border-bottom: 2px solid #e8e8e8;
}

.content-header h1 {
    font-size: 28px;
    font-weight: 600;
    color: #2c3e50;
    position: relative;
    padding-left: 16px;
}

.content-header h1::before {
    content: '';
    position: absolute;
    left: 0;
    top: 50%;
    transform: translateY(-50%);
    width: 4px;
    height: 24px;
    background: linear-gradient(135deg, var(--primary-color), var(--primary-dark));
    border-radius: 2px;
}

.content-body {
    background-color: #fff;
    padding: 24px;
    border-radius: var(--border-radius);
    box-shadow: var(--box-shadow);
}

/* 页面头部 */
.page-header {
    margin-bottom: 24px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 16px;
    background-color: #fafafa;
    border-radius: var(--border-radius);
}

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

.search-form input {
    padding: 10px 16px;
    border: 1px solid #e0e0e0;
    border-radius: 6px;
    font-size: 14px;
    width: 300px;
    transition: var(--transition);
}

.search-form input:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(52, 152, 219, 0.1);
}

/* 按钮样式 */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 10px 20px;
    border: none;
    border-radius: 6px;
    font-size: 14px;
    font-weight: 500;
    cursor: pointer;
    text-decoration: none;
    transition: var(--transition);
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
}

.btn:hover {
    transform: translateY(-1px);
    box-shadow: 0 4px 8px rgba(0, 0, 0, 0.15);
}

.btn:active {
    transform: translateY(0);
}

.btn-primary {
    background: linear-gradient(135deg, var(--primary-color), var(--primary-dark));
    color: #fff;
}

.btn-primary:hover {
    background: linear-gradient(135deg, var(--primary-dark), #1f6fa0);
}

.btn-secondary {
    background-color: #95a5a6;
    color: #fff;
}

.btn-secondary:hover {
    background-color: #7f8c8d;
}

.btn-sm {
    padding: 6px 12px;
    font-size: 13px;
}

.btn-edit {
    background-color: var(--warning-color);
    color: #fff;
}

.btn-edit:hover {
    background-color: #e67e22;
}

.btn-delete {
    background-color: var(--danger-color);
    color: #fff;
}

.btn-delete:hover {
    background-color: #c0392b;
}

.btn-view {
    background-color: var(--primary-color);
    color: #fff;
}

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

/* 表格样式 */
.data-table {
    width: 100%;
    border-collapse: separate;
    border-spacing: 0;
    margin-top: 20px;
    border-radius: var(--border-radius);
    overflow: hidden;
    box-shadow: 0 1px 3px rgba(0, 0, 0, 0.05);
}

.data-table th,
.data-table td {
    padding: 16px;
    text-align: left;
    border-bottom: 1px solid #f0f0f0;
}

.data-table th {
    background: linear-gradient(180deg, #fafafa 0%, #f5f5f5 100%);
    font-weight: 600;
    color: #2c3e50;
    font-size: 14px;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    position: sticky;
    top: 0;
    z-index: 10;
}

.data-table tbody tr {
    transition: var(--transition);
}

.data-table tbody tr:hover {
    background-color: #f8f9fa;
    transform: scale(1.001);
}

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

.data-table td img {
    border-radius: 6px;
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
}

.text-center {
    text-align: center;
}

/* 表单样式 */
/*.form-container {*/
/*    max-width: 700px;*/
/*}*/

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

.form-group label {
    display: block;
    margin-bottom: 8px;
    font-weight: 600;
    color: #2c3e50;
    font-size: 14px;
}

.form-group input,
.form-group select,
.form-group textarea {
    width: 100%;
    padding: 10px 16px;
    border: 1px solid #e0e0e0;
    border-radius: 6px;
    font-size: 14px;
    transition: var(--transition);
    background-color: #fafafa;
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--primary-color);
    background-color: #fff;
    box-shadow: 0 0 0 3px rgba(52, 152, 219, 0.1);
}

.form-group textarea {
    resize: vertical;
    min-height: 120px;
}

.form-actions {
    margin-top: 32px;
    padding-top: 24px;
    border-top: 2px solid #f0f0f0;
    display: flex;
    gap: 12px;
}

/* 详情页样式 */
.detail-container {
    max-width: 900px;
}

.detail-item {
    margin-bottom: 20px;
    padding: 16px;
    background-color: #fafafa;
    border-radius: 6px;
    display: flex;
    align-items: flex-start;
    transition: var(--transition);
}

.detail-item:hover {
    background-color: #f5f5f5;
}

.detail-item label {
    display: inline-block;
    min-width: 140px;
    font-weight: 600;
    color: #2c3e50;
    font-size: 14px;
}

.detail-item span {
    color: #555;
    flex: 1;
    word-break: break-word;
}

/* 紧凑型详情页样式 */
.detail-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 12px;
    margin-bottom: 20px;
}

.detail-item-compact {
    padding: 10px 14px;
    background-color: #fafafa;
    border-radius: 6px;
    display: flex;
    align-items: center;
    transition: var(--transition);
}

.detail-item-compact:hover {
    background-color: #f5f5f5;
}

.detail-item-compact label {
    display: inline-block;
    min-width: 100px;
    font-weight: 600;
    color: #2c3e50;
    font-size: 13px;
    margin-right: 8px;
}

.detail-item-compact span {
    color: #555;
    flex: 1;
    word-break: break-word;
    font-size: 13px;
}

.detail-actions {
    margin-top: 24px;
    padding-top: 20px;
    border-top: 2px solid #f0f0f0;
    display: flex;
    gap: 12px;
}

/* 分页样式 */
.pagination {
    margin-top: 24px;
    padding: 16px;
    text-align: center;
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 12px;
    background-color: #fafafa;
    border-radius: var(--border-radius);
}

.pagination .btn {
    min-width: 80px;
}

.pagination span {
    color: #666;
    font-size: 14px;
    padding: 0 16px;
}

/* 统计卡片 */
.dashboard {
    padding: 20px;
}

.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
    gap: 24px;
    margin-top: 20px;
}

.stat-card {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: #fff;
    padding: 24px;
    border-radius: var(--border-radius);
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15);
    position: relative;
    overflow: hidden;
    transition: var(--transition);
}

.stat-card::before {
    content: '';
    position: absolute;
    top: -50%;
    right: -50%;
    width: 200%;
    height: 200%;
    background: radial-gradient(circle, rgba(255, 255, 255, 0.1) 0%, transparent 70%);
}

.stat-card:hover {
    transform: translateY(-4px);
    box-shadow: 0 8px 20px rgba(0, 0, 0, 0.2);
}

.stat-card h3 {
    font-size: 14px;
    margin-bottom: 12px;
    opacity: 0.9;
    text-transform: uppercase;
    letter-spacing: 1px;
}

.stat-number {
    font-size: 36px;
    font-weight: 700;
    position: relative;
    z-index: 1;
}

/* 分类树样式 */
.category-tree h3 {
    margin-top: 30px;
    margin-bottom: 15px;
    color: #2c3e50;
    font-size: 18px;
}

.category-tree h3:first-child {
    margin-top: 0;
}

/* Toast 提示样式 */
.toast-container {
    position: fixed;
    top: 20px;
    right: 20px;
    z-index: 10000;
    pointer-events: none;
}

.toast {
    display: flex;
    align-items: center;
    gap: 12px;
    min-width: 300px;
    max-width: 500px;
    padding: 16px 20px;
    margin-bottom: 12px;
    background-color: #fff;
    border-radius: var(--radius-sm);
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15);
    opacity: 0;
    transform: translateX(400px);
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    pointer-events: auto;
}

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

.toast-icon {
    width: 24px;
    height: 24px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 16px;
    font-weight: bold;
    flex-shrink: 0;
}

.toast-message {
    flex: 1;
    font-size: 14px;
    line-height: 1.5;
    color: #333;
}

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

.toast-success .toast-icon {
    background-color: var(--success-color);
    color: #fff;
}

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

.toast-error .toast-icon {
    background-color: var(--danger-color);
    color: #fff;
}

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

.toast-warning .toast-icon {
    background-color: var(--warning-color);
    color: #fff;
}

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

.toast-info .toast-icon {
    background-color: var(--primary-color);
    color: #fff;
}

/* 确认对话框样式 */
.confirm-overlay {
    position: fixed;
    inset: 0;
    padding: 40px 24px;
    background: rgba(15, 23, 42, 0.35);
    backdrop-filter: blur(2px);
    z-index: 12000;
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    transition: opacity 0.25s ease;
}

.confirm-overlay.confirm-show {
    opacity: 1;
}

.confirm-dialog {
    width: 420px;
    max-width: 100%;
    border-radius: 12px;
    background: #ffffff;
    box-shadow: 0 22px 55px rgba(15, 23, 42, 0.18);
    transform: translateY(24px);
    transition: transform 0.25s ease, opacity 0.25s ease;
    opacity: 0;
}

.confirm-overlay.confirm-show .confirm-dialog {
    transform: translateY(0);
    opacity: 1;
}

.confirm-dialog-content {
    padding: 28px 32px 26px;
}

.confirm-dialog-title {
    font-size: 18px;
    font-weight: 600;
    color: #1f2937;
    margin: 0 0 12px;
}

.confirm-dialog-message {
    font-size: 14px;
    line-height: 1.7;
    color: #4b5563;
}

.confirm-dialog-buttons {
    margin-top: 24px;
    display: flex;
    justify-content: flex-end;
    gap: 12px;
}

.confirm-dialog-btn {
    min-width: 92px;
    padding: 10px 20px;
    border: none;
    border-radius: 8px;
    font-size: 14px;
    font-weight: 500;
    cursor: pointer;
    transition: background-color 0.2s ease, transform 0.2s ease;
}

.confirm-dialog-btn-cancel {
    background-color: #f1f5f9;
    color: #475569;
}

.confirm-dialog-btn-cancel:hover {
    background-color: #e2e8f0;
}

.confirm-dialog-btn-confirm {
    background-color: var(--primary-color);
    color: #fff;
    box-shadow: 0 10px 20px rgba(60, 197, 31, 0.25);
}

.confirm-dialog-btn-confirm:hover {
    background-color: var(--primary-dark);
    transform: translateY(-1px);
}

@media (max-width: 640px) {
    .confirm-dialog {
        border-radius: 10px;
        width: 100%;
    }

    .confirm-dialog-content {
        padding: 24px 20px 20px;
    }

    .confirm-dialog-buttons {
        gap: 10px;
    }

    .confirm-dialog-btn {
        min-width: 0;
        flex: 1;
    }
}

/* 加载提示样式 */
.loading-overlay {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-color: rgba(0, 0, 0, 0.5);
    z-index: 9998;
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    transition: opacity 0.3s;
}

.loading-overlay.loading-show {
    opacity: 1;
}

.loading-spinner {
    background-color: #fff;
    border-radius: var(--radius-sm);
    padding: 32px 48px;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 16px;
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.2);
}

.spinner {
    width: 40px;
    height: 40px;
    border: 4px solid #f0f0f0;
    border-top-color: var(--primary-color);
    border-radius: 50%;
    animation: spin 0.8s linear infinite;
}

@keyframes spin {
    to {
        transform: rotate(360deg);
    }
}

.loading-text {
    margin: 0;
    font-size: 14px;
    color: #666;
}

/* 图片上传样式 */
.image-upload-container {
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.image-preview {
    position: relative;
    width: 320px;
    height: 220px;
    border: 2px dashed #d0d0d0;
    border-radius: var(--border-radius);
    overflow: hidden;
    background-color: #fafafa;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: var(--transition);
}

.image-preview:hover {
    border-color: var(--primary-color);
    background-color: #f5f5f5;
}

.image-preview img {
    max-width: 100%;
    max-height: 100%;
    object-fit: contain;
}

.upload-placeholder {
    color: #999;
    text-align: center;
    padding: 20px;
    font-size: 14px;
}

.remove-image {
    position: absolute;
    top: 8px;
    right: 8px;
    width: 28px;
    height: 28px;
    background-color: rgba(231, 76, 60, 0.9);
    color: #fff;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    font-size: 18px;
    line-height: 1;
    transition: var(--transition);
}

.remove-image:hover {
    background-color: var(--danger-color);
    transform: scale(1.1);
}

.upload-status {
    font-size: 13px;
    color: #666;
    padding: 8px 12px;
    background-color: #f0f0f0;
    border-radius: 4px;
}