/* 网址导航系统样式表 - 优化版 */
/* 现代化设计，支持深色模式，性能优化 */

/* 基础样式重置和CSS变量 - 融合Tailwind设计 */
:root {
    /* 主色调 - 采用Tailwind紫色渐变 */
    --primary-color: #4f46e5;
    --primary-hover: #7c3aed;
    --primary-gradient: linear-gradient(135deg, #4f46e5 0%, #7c3aed 100%);
    
    --secondary-color: #64748b;
    --success-color: #10b981;
    --warning-color: #f59e0b;
    --error-color: #ef4444;
    
    /* 背景色 - 优化为更现代的浅色 */
    --bg-primary: #ffffff;
    --bg-secondary: #f8fafc;
    --bg-tertiary: #f1f5f9;
    --text-primary: #1e293b;
    --text-secondary: #64748b;
    --text-muted: #94a3b8;
    
    --border-color: #e2e8f0;
    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1);
    
    --radius-sm: 0.375rem;
    --radius-md: 0.5rem;
    --radius-lg: 0.75rem;
    
    --transition: all 0.2s ease-in-out;
}

/* 深色模式支持 */
@media (prefers-color-scheme: dark) {
    :root {
        --bg-primary: #0f172a;
        --bg-secondary: #1e293b;
        --bg-tertiary: #334155;
        --text-primary: #f1f5f9;
        --text-secondary: #cbd5e1;
        --text-muted: #94a3b8;
        --border-color: #334155;
    }
}

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

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    line-height: 1.6;
    color: var(--text-primary);
    background-color: var(--bg-secondary);
    transition: var(--transition);
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

/* 头部样式 - 融合Tailwind渐变设计 */
.header {
    background: var(--primary-gradient);
    color: white;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
    position: sticky;
    top: 0;
    z-index: 1000;
}

.header .container {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 1rem 20px;
}

.nav-brand {
    display: flex;
    align-items: center;
    gap: 10px;
}

.logo {
    font-size: 1.8rem;
    font-weight: 700;
    color: #1e40af;
    text-decoration: none;
}

.tagline {
    color: #6b7280;
    font-size: 0.9rem;
}

/* 搜索框样式 */
.search-box {
    flex: 1;
    max-width: 500px;
    margin: 0 2rem;
}

.search-form {
    position: relative;
    display: flex;
}

.search-input {
    width: 100%;
    padding: 12px 20px;
    border: 2px solid #e5e7eb;
    border-radius: 25px;
    font-size: 1rem;
    outline: none;
    transition: all 0.3s ease;
}

.search-input:focus {
    border-color: #1e40af;
    box-shadow: 0 0 0 3px rgba(30, 64, 175, 0.1);
}

.search-btn {
    position: absolute;
    right: 5px;
    top: 50%;
    transform: translateY(-50%);
    background: #1e40af;
    border: none;
    border-radius: 50%;
    width: 40px;
    height: 40px;
    color: white;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: background 0.3s ease;
}

.search-btn:hover {
    background: #1d4ed8;
}

/* 按钮样式 */
.btn {
    display: inline-block;
    padding: 10px 20px;
    border: 2px solid;
    border-radius: 8px;
    text-decoration: none;
    font-weight: 500;
    transition: all 0.3s ease;
    cursor: pointer;
}

.btn-primary {
    background: #1e40af;
    color: white;
    border-color: #1e40af;
}

.btn-primary:hover {
    background: #1d4ed8;
    border-color: #1d4ed8;
}

.btn-outline {
    background: transparent;
    color: #1e40af;
    border-color: #1e40af;
}

.btn-outline:hover {
    background: #1e40af;
    color: white;
}

.user-actions {
    display: flex;
    gap: 10px;
}

/* 主要内容区域 */
.main-content {
    padding: 2rem 0;
}

.section-title {
    font-size: 2rem;
    font-weight: 700;
    color: #1f2937;
    margin-bottom: 2rem;
    text-align: center;
}

/* 分类网格布局 */
.categories-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 1.5rem;
    margin-bottom: 3rem;
}

.category-card {
    background: white;
    border-radius: 12px;
    padding: 2rem;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.05);
    transition: all 0.3s ease;
    text-align: center;
}

.category-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 25px rgba(0, 0, 0, 0.1);
}

.category-icon {
    width: 64px;
    height: 64px;
    background: #eff6ff;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 1rem;
    color: #1e40af;
}

.category-name {
    font-size: 1.3rem;
    font-weight: 600;
    color: #1f2937;
    margin-bottom: 0.5rem;
}

.category-desc {
    color: #6b7280;
    margin-bottom: 1rem;
    line-height: 1.5;
}

.category-link {
    color: #1e40af;
    text-decoration: none;
    font-weight: 500;
    transition: color 0.3s ease;
}

.category-link:hover {
    color: #1d4ed8;
}

/* 网址卡片样式 */
.bookmarks-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 1.5rem;
}

.bookmark-card {
    background: white;
    border-radius: 12px;
    padding: 1.5rem;
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.05);
    transition: all 0.3s ease;
    border: 1px solid #f3f4f6;
}

.bookmark-card:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 20px rgba(0, 0, 0, 0.1);
    border-color: #e5e7eb;
}

.bookmark-header {
    display: flex;
    align-items: center;
    margin-bottom: 1rem;
}

.bookmark-icon {
    width: 40px;
    height: 40px;
    background: #eff6ff;
    border-radius: 8px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-right: 1rem;
    color: #1e40af;
    font-weight: bold;
}

.bookmark-title {
    font-size: 1.1rem;
    font-weight: 600;
    color: #1f2937;
    text-decoration: none;
}

.bookmark-title:hover {
    color: #1e40af;
}

.bookmark-description {
    color: #6b7280;
    margin-bottom: 1rem;
    line-height: 1.5;
}

.bookmark-meta {
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-size: 0.9rem;
    color: #9ca3af;
}

.bookmark-category {
    background: #f3f4f6;
    padding: 4px 8px;
    border-radius: 4px;
    font-size: 0.8rem;
}

/* 表单样式 */
.form-group {
    margin-bottom: 1.5rem;
}

.form-label {
    display: block;
    margin-bottom: 0.5rem;
    font-weight: 500;
    color: #374151;
}

.form-input {
    width: 100%;
    padding: 12px;
    border: 2px solid #e5e7eb;
    border-radius: 8px;
    font-size: 1rem;
    transition: border-color 0.3s ease;
}

.form-input:focus {
    outline: none;
    border-color: #1e40af;
    box-shadow: 0 0 0 3px rgba(30, 64, 175, 0.1);
}

.form-textarea {
    resize: vertical;
    min-height: 100px;
}

/* 页脚样式 */
.footer {
    background: #1f2937;
    color: #d1d5db;
    padding: 2rem 0;
    margin-top: 3rem;
}

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

/* 加载状态 */
.loading {
    text-align: center;
    padding: 2rem;
    color: #6b7280;
}

/* 工具类 */
.text-center { text-align: center; }
.text-left { text-align: left; }
.text-right { text-align: right; }

.mt-1 { margin-top: 0.5rem; }
.mt-2 { margin-top: 1rem; }
.mt-3 { margin-top: 1.5rem; }
.mt-4 { margin-top: 2rem; }

.mb-1 { margin-bottom: 0.5rem; }
.mb-2 { margin-bottom: 1rem; }
.mb-3 { margin-bottom: 1.5rem; }
.mb-4 { margin-bottom: 2rem; }

.hidden { display: none; }
.flex { display: flex; }
.items-center { align-items: center; }
.justify-between { justify-content: space-between; }

/* 后台管理样式 - 优化版 */
.admin-header {
    background: var(--primary-color);
    color: white;
    padding: 1rem 0;
    margin-bottom: 2rem;
}

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

.admin-nav {
    display: flex;
    gap: 1rem;
}

.admin-nav-link {
    color: white;
    text-decoration: none;
    padding: 0.5rem 1rem;
    border-radius: var(--radius-sm);
    transition: background 0.3s ease;
}

.admin-nav-link:hover,
.admin-nav-link.active {
    background: rgba(255, 255, 255, 0.2);
}

.admin-main {
    padding: 2rem 0;
}

.admin-sidebar {
    background: var(--bg-secondary);
    border-radius: var(--radius-md);
    padding: 1.5rem;
    margin-bottom: 2rem;
}

.admin-sidebar-title {
    font-size: 1.2rem;
    font-weight: 600;
    margin-bottom: 1rem;
    color: var(--text-primary);
}

.admin-sidebar-nav {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.admin-sidebar-link {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    padding: 0.75rem 1rem;
    color: var(--text-secondary);
    text-decoration: none;
    border-radius: var(--radius-sm);
    transition: all 0.3s ease;
}

.admin-sidebar-link:hover,
.admin-sidebar-link.active {
    background: var(--primary-color);
    color: white;
}

.admin-content {
    background: var(--bg-primary);
    border-radius: var(--radius-md);
    padding: 2rem;
    box-shadow: var(--shadow-sm);
}

.admin-section-title {
    font-size: 1.5rem;
    font-weight: 600;
    margin-bottom: 1.5rem;
    color: var(--text-primary);
}

.admin-stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 1.5rem;
    margin-bottom: 2rem;
}

.admin-stat-card {
    background: var(--bg-secondary);
    border-radius: var(--radius-md);
    padding: 1.5rem;
    text-align: center;
}

.admin-stat-number {
    font-size: 2rem;
    font-weight: 700;
    color: var(--primary-color);
    margin-bottom: 0.5rem;
}

.admin-stat-label {
    color: var(--text-secondary);
    font-size: 0.9rem;
}

.admin-form {
    background: var(--bg-secondary);
    border-radius: var(--radius-md);
    padding: 1.5rem;
    margin-bottom: 2rem;
}

.admin-form-title {
    font-size: 1.2rem;
    font-weight: 600;
    margin-bottom: 1rem;
    color: var(--text-primary);
}

.admin-form-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1rem;
    margin-bottom: 1rem;
}

.admin-form-group {
    margin-bottom: 1rem;
}

.admin-form-label {
    display: block;
    margin-bottom: 0.5rem;
    font-weight: 500;
    color: var(--text-primary);
}

.admin-form-input {
    width: 100%;
    padding: 0.75rem;
    border: 1px solid var(--border-color);
    border-radius: var(--radius-sm);
    font-size: 1rem;
    transition: border-color 0.3s ease;
}

.admin-form-input:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(30, 64, 175, 0.1);
}

.admin-form-textarea {
    resize: vertical;
    min-height: 100px;
}

.admin-form-select {
    width: 100%;
    padding: 0.75rem;
    border: 1px solid var(--border-color);
    border-radius: var(--radius-sm);
    font-size: 1rem;
    background: var(--bg-primary);
    cursor: pointer;
}

.admin-table {
    width: 100%;
    border-collapse: collapse;
    background: var(--bg-primary);
    border-radius: var(--radius-md);
    overflow: hidden;
    box-shadow: var(--shadow-sm);
}

.admin-table th,
.admin-table td {
    padding: 1rem;
    text-align: left;
    border-bottom: 1px solid var(--border-color);
}

.admin-table th {
    background: var(--bg-secondary);
    font-weight: 600;
    color: var(--text-primary);
}

.admin-table tr:hover {
    background: var(--bg-secondary);
}

.admin-btn {
    display: inline-block;
    padding: 0.75rem 1.5rem;
    border: none;
    border-radius: var(--radius-sm);
    font-weight: 500;
    text-decoration: none;
    cursor: pointer;
    transition: all 0.3s ease;
}

.admin-btn-primary {
    background: var(--primary-color);
    color: white;
}

.admin-btn-primary:hover {
    background: var(--primary-hover);
}

.admin-btn-success {
    background: var(--success-color);
    color: white;
}

.admin-btn-success:hover {
    background: #0da271;
}

.admin-btn-warning {
    background: var(--warning-color);
    color: white;
}

.admin-btn-warning:hover {
    background: #d97706;
}

.admin-btn-danger {
    background: var(--error-color);
    color: white;
}

.admin-btn-danger:hover {
    background: #dc2626;
}

.admin-btn-sm {
    padding: 0.5rem 1rem;
    font-size: 0.85rem;
}

.admin-alert {
    padding: 1rem;
    border-radius: var(--radius-sm);
    margin-bottom: 1rem;
}

.admin-alert-success {
    background: #d1fae5;
    border: 1px solid #a7f3d0;
    color: #065f46;
}

.admin-alert-error {
    background: #fee2e2;
    border: 1px solid #fecaca;
    color: #dc2626;
}

.admin-modal {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.5);
    z-index: 1000;
}

.admin-modal-content {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    background: var(--bg-primary);
    border-radius: var(--radius-md);
    padding: 2rem;
    width: 90%;
    max-width: 500px;
}

.admin-modal-header {
    margin-bottom: 1.5rem;
}

.admin-modal-title {
    font-size: 1.3rem;
    font-weight: 600;
    color: var(--text-primary);
}

.admin-modal-close {
    position: absolute;
    top: 1rem;
    right: 1rem;
    background: none;
    border: none;
    font-size: 1.5rem;
    cursor: pointer;
    color: var(--text-secondary);
}

.admin-modal-close:hover {
    color: var(--text-primary);
}

/* 响应式设计将在单独的CSS文件中实现 */

/* 收藏功能样式 - 优化版 */
.btn-success {
    background-color: var(--success-color);
    border-color: var(--success-color);
    color: white;
}

.btn-success:hover {
    background-color: #0da271;
    border-color: #0da271;
}

.favorite-btn:disabled {
    opacity: 0.7;
    cursor: not-allowed;
}

/* 收藏页面样式 */
.favorites-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 20px;
}

.user-stats {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    padding: 30px;
    border-radius: var(--radius-lg);
    margin-bottom: 30px;
    text-align: center;
}

.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 20px;
    margin-top: 20px;
}

.stat-item {
    background: rgba(255, 255, 255, 0.1);
    padding: 20px;
    border-radius: var(--radius-md);
    backdrop-filter: blur(10px);
}

.stat-number {
    font-size: 2.5em;
    font-weight: bold;
    margin-bottom: 5px;
}

.stat-label {
    font-size: 0.9em;
    opacity: 0.8;
}

.favorites-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: 20px;
    margin-top: 30px;
}

.favorite-item {
    background: var(--bg-primary);
    border-radius: var(--radius-lg);
    padding: 20px;
    box-shadow: var(--shadow-sm);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
    border-left: 4px solid var(--primary-color);
}

.favorite-item:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
}

.favorite-header {
    display: flex;
    align-items: center;
    margin-bottom: 15px;
}

.favorite-icon {
    width: 40px;
    height: 40px;
    border-radius: var(--radius-sm);
    margin-right: 15px;
    object-fit: cover;
}

.favorite-title {
    font-size: 1.1em;
    font-weight: bold;
    color: var(--text-primary);
    margin: 0;
    flex: 1;
}

.favorite-url {
    color: var(--text-secondary);
    font-size: 0.9em;
    margin-bottom: 10px;
    word-break: break-all;
}

.favorite-description {
    color: var(--text-muted);
    font-size: 0.9em;
    line-height: 1.4;
    margin-bottom: 15px;
}

.favorite-meta {
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-size: 0.8em;
    color: var(--text-muted);
}

.favorite-actions {
    display: flex;
    gap: 10px;
}

.btn-remove {
    background: var(--error-color);
    color: white;
    border: none;
    padding: 5px 10px;
    border-radius: var(--radius-sm);
    cursor: pointer;
    font-size: 0.8em;
    transition: background 0.3s ease;
}

.btn-remove:hover {
    background: #dc2626;
}

.empty-state {
    text-align: center;
    padding: 60px 20px;
    color: var(--text-secondary);
}

.empty-state svg {
    width: 80px;
    height: 80px;
    margin-bottom: 20px;
    opacity: 0.5;
}

.empty-state h3 {
    margin-bottom: 10px;
    color: var(--text-primary);
}

.empty-state p {
    margin-bottom: 20px;
}

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

/* 新增功能模块样式 */

/* 搜索页面样式 */
.search-header {
    margin-bottom: 2rem;
}

.search-title {
    font-size: 1.5rem;
    font-weight: 600;
    color: #1f2937;
    margin-bottom: 0.5rem;
}

.search-count {
    color: #6b7280;
    font-size: 0.9rem;
}

.search-results {
    display: grid;
    gap: 1rem;
}

.search-item {
    background: #fff;
    border-radius: 12px;
    padding: 1.5rem;
    box-shadow: 0 1px 3px rgba(0, 0, 0, 0.1);
    display: flex;
    align-items: flex-start;
    gap: 1rem;
    transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.search-item:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15);
}

.result-icon {
    flex-shrink: 0;
}

.result-icon img {
    width: 48px;
    height: 48px;
    border-radius: 8px;
    object-fit: cover;
}

.default-icon {
    width: 48px;
    height: 48px;
    border-radius: 8px;
    background: #e5e7eb;
    display: flex;
    align-items: center;
    justify-content: center;
    color: #6b7280;
}

.result-content {
    flex: 1;
}

.result-title {
    font-size: 1.1rem;
    font-weight: 600;
    margin-bottom: 0.5rem;
}

.result-title a {
    color: #1e40af;
    text-decoration: none;
}

.result-title a:hover {
    color: #1d4ed8;
}

.result-description {
    color: #6b7280;
    margin-bottom: 0.5rem;
    line-height: 1.5;
}

.result-meta {
    display: flex;
    align-items: center;
    gap: 1rem;
    font-size: 0.85rem;
    color: #9ca3af;
}

.result-category {
    background: #f3f4f6;
    padding: 0.25rem 0.5rem;
    border-radius: 4px;
    color: #4b5563;
}

.no-results, .search-prompt {
    text-align: center;
    padding: 3rem 1rem;
}

.no-results-icon, .prompt-icon {
    margin-bottom: 1rem;
    color: #d1d5db;
}

/* 认证页面样式 */
.auth-page {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

.auth-main {
    flex: 1;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 2rem 0;
}

.auth-container {
    width: 100%;
    max-width: 400px;
}

.auth-card {
    background: #fff;
    border-radius: 16px;
    padding: 2rem;
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.1);
}

.auth-header {
    text-align: center;
    margin-bottom: 2rem;
}

.auth-title {
    font-size: 1.5rem;
    font-weight: 700;
    color: #1f2937;
    margin-bottom: 0.5rem;
}

.auth-subtitle {
    color: #6b7280;
    font-size: 0.9rem;
}

.auth-form {
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.auth-footer {
    text-align: center;
    margin-top: 1.5rem;
    padding-top: 1.5rem;
    border-top: 1px solid #e5e7eb;
}

.auth-link {
    color: #1e40af;
    text-decoration: none;
    font-weight: 500;
}

.auth-link:hover {
    color: #1d4ed8;
}

/* 个人中心样式 */
.profile-layout {
    display: grid;
    grid-template-columns: 280px 1fr;
    gap: 2rem;
    margin-top: 2rem;
}

.profile-sidebar {
    background: #fff;
    border-radius: 12px;
    padding: 1.5rem;
    box-shadow: 0 1px 3px rgba(0, 0, 0, 0.1);
}

.user-card {
    text-align: center;
    margin-bottom: 1.5rem;
}

.user-avatar {
    margin-bottom: 1rem;
}

.user-avatar img {
    width: 80px;
    height: 80px;
    border-radius: 50%;
    object-fit: cover;
}

.avatar-placeholder {
    width: 80px;
    height: 80px;
    border-radius: 50%;
    background: #1e40af;
    color: #fff;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 2rem;
    font-weight: 600;
    margin: 0 auto;
}

.user-name {
    font-size: 1.2rem;
    font-weight: 600;
    margin-bottom: 0.25rem;
}

.user-email {
    color: #6b7280;
    font-size: 0.9rem;
    margin-bottom: 0.5rem;
}

.user-join-date {
    color: #9ca3af;
    font-size: 0.8rem;
}

.profile-nav {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.nav-link {
    padding: 0.75rem 1rem;
    border-radius: 8px;
    color: #6b7280;
    text-decoration: none;
    transition: all 0.2s ease;
}

.nav-link:hover, .nav-link.active {
    background: #f3f4f6;
    color: #1e40af;
}

.profile-content {
    background: #fff;
    border-radius: 12px;
    padding: 2rem;
    box-shadow: 0 1px 3px rgba(0, 0, 0, 0.1);
}

.profile-section {
    display: block;
}

.section-title {
    font-size: 1.3rem;
    font-weight: 600;
    margin-bottom: 1.5rem;
    color: #1f2937;
}

.profile-form {
    max-width: 400px;
}

.favorites-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: 1rem;
}

.empty-state {
    text-align: center;
    padding: 3rem 1rem;
    color: #6b7280;
}

.empty-icon {
    margin-bottom: 1rem;
    color: #d1d5db;
}

/* 管理后台样式 */
.admin-layout {
    display: grid;
    grid-template-columns: 250px 1fr;
    gap: 2rem;
    margin-top: 2rem;
}

.admin-sidebar {
    background: #fff;
    border-radius: 12px;
    padding: 1.5rem;
    box-shadow: 0 1px 3px rgba(0, 0, 0, 0.1);
}

.admin-nav {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.admin-content {
    background: #fff;
    border-radius: 12px;
    padding: 2rem;
    box-shadow: 0 1px 3px rgba(0, 0, 0, 0.1);
}

.admin-section {
    display: block;
}

.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 1.5rem;
    margin-bottom: 2rem;
}

.stat-card {
    background: #f8fafc;
    border-radius: 12px;
    padding: 1.5rem;
    display: flex;
    align-items: center;
    gap: 1rem;
}

.stat-icon {
    width: 60px;
    height: 60px;
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.stat-icon.users { background: #dbeafe; color: #1e40af; }
.stat-icon.categories { background: #f3e8ff; color: #7c3aed; }
.stat-icon.bookmarks { background: #fef3c7; color: #d97706; }
.stat-icon.favorites { background: #fce7f3; color: #db2777; }

.stat-number {
    font-size: 1.8rem;
    font-weight: 700;
    color: #1f2937;
    margin-bottom: 0.25rem;
}

.stat-label {
    color: #6b7280;
    font-size: 0.9rem;
}

.form-card {
    background: #f8fafc;
    border-radius: 12px;
    padding: 1.5rem;
    margin-bottom: 2rem;
}

.form-title {
    font-size: 1.1rem;
    font-weight: 600;
    margin-bottom: 1rem;
    color: #1f2937;
}

.form-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1rem;
}

.form-select {
    width: 100%;
    padding: 12px;
    border: 2px solid #e5e7eb;
    border-radius: 8px;
    font-size: 1rem;
    background: #fff;
    cursor: pointer;
}

.checkbox-label {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    cursor: pointer;
}

.checkbox-text {
    color: #374151;
}

.table-card {
    background: #f8fafc;
    border-radius: 12px;
    padding: 1.5rem;
}

.table-title {
    font-size: 1.1rem;
    font-weight: 600;
    margin-bottom: 1rem;
    color: #1f2937;
}

.table-responsive {
    overflow-x: auto;
}

.data-table {
    width: 100%;
    border-collapse: collapse;
    background: #fff;
    border-radius: 8px;
    overflow: hidden;
}

.data-table th,
.data-table td {
    padding: 1rem;
    text-align: left;
    border-bottom: 1px solid #e5e7eb;
}

.data-table th {
    background: #f9fafb;
    font-weight: 600;
    color: #374151;
}

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

.url-link {
    color: #1e40af;
    text-decoration: none;
    font-size: 0.9rem;
}

.url-link:hover {
    color: #1d4ed8;
}

.btn-sm {
    padding: 0.5rem 1rem;
    font-size: 0.85rem;
}

/* 分类页面样式 */
.breadcrumb {
    background: #f8fafc;
    padding: 1rem 0;
    border-bottom: 1px solid #e5e7eb;
}

.breadcrumb .container {
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.breadcrumb-link {
    color: #6b7280;
    text-decoration: none;
    font-size: 0.9rem;
}

.breadcrumb-link:hover {
    color: #374151;
}

.breadcrumb-separator {
    color: #9ca3af;
}

.breadcrumb-current {
    color: #374151;
    font-weight: 500;
}

.category-header {
    margin-bottom: 2rem;
}

.category-info {
    display: flex;
    align-items: center;
    gap: 1.5rem;
    background: #fff;
    border-radius: 12px;
    padding: 2rem;
    box-shadow: 0 1px 3px rgba(0, 0, 0, 0.1);
}

.category-icon {
    flex-shrink: 0;
}

.category-icon img {
    width: 64px;
    height: 64px;
    border-radius: 12px;
    object-fit: cover;
}

.category-icon.default {
    width: 64px;
    height: 64px;
    border-radius: 12px;
    background: #e5e7eb;
    display: flex;
    align-items: center;
    justify-content: center;
    color: #6b7280;
}

.category-title {
    font-size: 1.8rem;
    font-weight: 700;
    color: #1f2937;
    margin-bottom: 0.5rem;
}

.category-description {
    color: #6b7280;
    margin-bottom: 0.5rem;
}

.category-count {
    color: #9ca3af;
    font-size: 0.9rem;
}

.bookmarks-section {
    margin-top: 2rem;
}

.bookmarks-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(350px, 1fr));
    gap: 1.5rem;
}

.bookmark-card {
    background: #fff;
    border-radius: 12px;
    padding: 1.5rem;
    box-shadow: 0 1px 3px rgba(0, 0, 0, 0.1);
    transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.bookmark-card:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15);
}

.bookmark-icon {
    margin-bottom: 1rem;
}

.bookmark-icon img {
    width: 48px;
    height: 48px;
    border-radius: 8px;
    object-fit: cover;
}

.bookmark-content {
    flex: 1;
}

.bookmark-title {
    font-size: 1.1rem;
    font-weight: 600;
    margin-bottom: 0.75rem;
}

.bookmark-link {
    color: #1e40af;
    text-decoration: none;
}

.bookmark-link:hover {
    color: #1d4ed8;
}

.bookmark-description {
    color: #6b7280;
    margin-bottom: 1rem;
    line-height: 1.5;
}

.bookmark-actions {
    display: flex;
    gap: 0.75rem;
}

.btn-outline {
    background: transparent;
    border: 1px solid #d1d5db;
    color: #374151;
}

.btn-outline:hover {
    background: #f9fafb;
    border-color: #9ca3af;
}



/* 响应式设计将在单独的CSS文件中实现 */

/* 收藏功能样式 */
.btn-success {
    background-color: var(--success-color);
    border-color: var(--success-color);
    color: white;
}

.btn-success:hover {
    background-color: #0da271;
    border-color: #0da271;
}

.favorite-btn:disabled {
    opacity: 0.7;
    cursor: not-allowed;
}

/* 收藏页面样式 */
.favorites-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 20px;
}

.user-stats {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    padding: 30px;
    border-radius: 10px;
    margin-bottom: 30px;
    text-align: center;
}

.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 20px;
    margin-top: 20px;
}

.stat-item {
    background: rgba(255, 255, 255, 0.1);
    padding: 20px;
    border-radius: 8px;
    backdrop-filter: blur(10px);
}

.stat-number {
    font-size: 2.5em;
    font-weight: bold;
    margin-bottom: 5px;
}

.stat-label {
    font-size: 0.9em;
    opacity: 0.8;
}

.favorites-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: 20px;
    margin-top: 30px;
}

.favorite-item {
    background: white;
    border-radius: 10px;
    padding: 20px;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
    border-left: 4px solid #667eea;
}

.favorite-item:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.15);
}

.favorite-header {
    display: flex;
    align-items: center;
    margin-bottom: 15px;
}

.favorite-icon {
    width: 40px;
    height: 40px;
    border-radius: 8px;
    margin-right: 15px;
    object-fit: cover;
}

.favorite-title {
    font-size: 1.1em;
    font-weight: bold;
    color: #333;
    margin: 0;
    flex: 1;
}

.favorite-url {
    color: #666;
    font-size: 0.9em;
    margin-bottom: 10px;
    word-break: break-all;
}

.favorite-description {
    color: #777;
    font-size: 0.9em;
    line-height: 1.4;
    margin-bottom: 15px;
}

.favorite-meta {
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-size: 0.8em;
    color: #999;
}

.favorite-actions {
    display: flex;
    gap: 10px;
}

.btn-remove {
    background: #e74c3c;
    color: white;
    border: none;
    padding: 5px 10px;
    border-radius: 4px;
    cursor: pointer;
    font-size: 0.8em;
    transition: background 0.3s ease;
}

.btn-remove:hover {
    background: #c0392b;
}

.empty-state {
    text-align: center;
    padding: 60px 20px;
    color: #666;
}

.empty-state svg {
    width: 80px;
    height: 80px;
    margin-bottom: 20px;
    opacity: 0.5;
}

.empty-state h3 {
    margin-bottom: 10px;
    color: #333;
}

.empty-state p {
    margin-bottom: 20px;
}

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