/* 组件样式 */

/* 导航栏 */
.navbar {
    position: sticky;
    top: 0;
    z-index: 1000;
    background-color: var(--bg-primary);
    border-bottom: 1px solid var(--border-color);
    box-shadow: var(--shadow-sm);
}

.navbar .container {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding-top: var(--spacing-md);
    padding-bottom: var(--spacing-md);
}

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

.brand-link {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    text-decoration: none;
    color: var(--text-primary);
}

.brand-logo {
    width: 32px;
    height: 32px;
}

.brand-text {
    font-size: var(--font-size-lg);
    font-weight: 600;
}

.nav-menu {
    display: flex;
    align-items: center;
}

.nav-list {
    display: flex;
    align-items: center;
    gap: var(--spacing-lg);
}

.nav-link {
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
    padding: var(--spacing-sm) var(--spacing-md);
    color: var(--text-secondary);
    text-decoration: none;
    border-radius: var(--border-radius);
    transition: var(--transition-fast);
}

.nav-link:hover,
.nav-link.active {
    color: var(--primary-color);
    background-color: rgba(0, 123, 255, 0.1);
}

.nav-actions {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
}

.theme-toggle {
    padding: var(--spacing-sm);
    color: var(--text-secondary);
    background: none;
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius);
    cursor: pointer;
    transition: var(--transition-fast);
}

.theme-toggle:hover {
    color: var(--primary-color);
    border-color: var(--primary-color);
}

/* 页脚 */
.footer {
    background-color: var(--bg-dark);
    color: var(--text-light);
    padding: var(--spacing-xl) 0 var(--spacing-md);
    margin-top: auto;
}

.footer-content {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: var(--spacing-xl);
    margin-bottom: var(--spacing-xl);
}

.footer-section h3 {
    margin-bottom: var(--spacing-md);
    color: var(--text-light);
}

.footer-section p,
.footer-section li {
    color: #adb5bd;
    margin-bottom: var(--spacing-sm);
}

.footer-section ul {
    list-style: none;
}

.footer-bottom {
    text-align: center;
    padding-top: var(--spacing-md);
    border-top: 1px solid #495057;
    color: #6c757d;
}

/* 照片网格 */
.photo-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: var(--spacing-lg);
    margin-bottom: var(--spacing-xl);
}

.photo-card {
    background-color: var(--bg-primary);
    border-radius: var(--border-radius-lg);
    box-shadow: var(--shadow);
    overflow: hidden;
    transition: var(--transition);
    cursor: pointer;
}

.photo-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-lg);
}

.photo-image {
    position: relative;
    width: 100%;
    height: 200px;
    overflow: hidden;
}

.photo-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: var(--transition);
}

.photo-card:hover .photo-image img {
    transform: scale(1.05);
}

.photo-overlay {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.7);
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    transition: var(--transition);
}

.photo-card:hover .photo-overlay {
    opacity: 1;
}

.photo-info {
    padding: var(--spacing-md);
}

.photo-insight {
    font-size: var(--font-size-sm);
    line-height: 1.5;
    margin-bottom: var(--spacing-sm);
    display: -webkit-box;
    -webkit-line-clamp: 3;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

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

.views-count {
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
}

/* 排行榜 */
.ranking-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: var(--spacing-lg);
}

.ranking-item {
    position: relative;
    background-color: var(--bg-primary);
    border-radius: var(--border-radius-lg);
    box-shadow: var(--shadow);
    overflow: hidden;
    transition: var(--transition);
}

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

.ranking-badge {
    position: absolute;
    top: var(--spacing-md);
    left: var(--spacing-md);
    z-index: 10;
    width: 40px;
    height: 40px;
    background: linear-gradient(135deg, #ffd700, #ffed4e);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: var(--shadow);
}

.ranking-badge.rank-1 {
    background: linear-gradient(135deg, #ffd700, #ffed4e);
}

.ranking-badge.rank-2 {
    background: linear-gradient(135deg, #c0c0c0, #e8e8e8);
}

.ranking-badge.rank-3 {
    background: linear-gradient(135deg, #cd7f32, #daa520);
}

.rank-number {
    font-weight: 700;
    font-size: var(--font-size-sm);
    color: #333;
}

/* 筛选器 */
.gallery-filters,
.ranking-filters {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-sm);
    margin-bottom: var(--spacing-xl);
    flex-wrap: wrap;
}

.filter-btn,
.filter-tab {
    padding: var(--spacing-sm) var(--spacing-md);
    background-color: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius);
    color: var(--text-secondary);
    cursor: pointer;
    transition: var(--transition-fast);
}

.filter-btn:hover,
.filter-tab:hover,
.filter-btn.active,
.filter-tab.active {
    background-color: var(--primary-color);
    border-color: var(--primary-color);
    color: var(--text-light);
}

/* 统计卡片 */
.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: var(--spacing-lg);
    margin-bottom: var(--spacing-xl);
}

.stat-item,
.stat-card {
    background-color: var(--bg-primary);
    padding: var(--spacing-lg);
    border-radius: var(--border-radius-lg);
    box-shadow: var(--shadow);
    text-align: center;
    transition: var(--transition);
}

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

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

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

.stat-change {
    margin-top: var(--spacing-xs);
    font-size: var(--font-size-xs);
}

.stat-change.positive {
    color: var(--success-color);
}

.stat-change.negative {
    color: var(--danger-color);
}

/* 功能特色 */
.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: var(--spacing-xl);
}

.feature-item {
    text-align: center;
    padding: var(--spacing-xl);
}

.feature-icon {
    width: 80px;
    height: 80px;
    margin: 0 auto var(--spacing-lg);
    background: linear-gradient(135deg, var(--primary-color), #0056b3);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 2rem;
    color: white;
}

.feature-title {
    font-size: var(--font-size-lg);
    font-weight: 600;
    margin-bottom: var(--spacing-md);
}

.feature-description {
    color: var(--text-secondary);
    line-height: 1.6;
}

/* 区域标题 */
.section-header {
    text-align: center;
    margin-bottom: var(--spacing-xl);
}

.section-title {
    font-size: 2.5rem;
    font-weight: 700;
    margin-bottom: var(--spacing-md);
    color: var(--text-primary);
}

.section-subtitle {
    font-size: var(--font-size-lg);
    color: var(--text-secondary);
    max-width: 600px;
    margin: 0 auto;
}

.section-link {
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-xs);
    margin-top: var(--spacing-md);
    color: var(--primary-color);
    text-decoration: none;
    font-weight: 500;
    transition: var(--transition-fast);
}

.section-link:hover {
    color: var(--primary-hover);
}

/* 加载更多 */
.load-more-container {
    text-align: center;
    margin-top: var(--spacing-xl);
}

/* 空状态 */
.empty-state {
    text-align: center;
    padding: var(--spacing-xl);
    color: var(--text-secondary);
}

.empty-icon {
    font-size: 4rem;
    margin-bottom: var(--spacing-lg);
    opacity: 0.5;
}

.empty-title {
    font-size: var(--font-size-xl);
    margin-bottom: var(--spacing-md);
}

.empty-message {
    margin-bottom: var(--spacing-lg);
}

/* 进度条 */
.progress-bar {
    width: 100%;
    height: 8px;
    background-color: var(--bg-secondary);
    border-radius: var(--border-radius);
    overflow: hidden;
}

.progress-fill {
    height: 100%;
    background: linear-gradient(90deg, var(--primary-color), #0056b3);
    border-radius: var(--border-radius);
    transition: width 0.3s ease;
    width: 0%;
}

/* 字符计数器 */
.char-counter {
    text-align: right;
    font-size: var(--font-size-xs);
    color: var(--text-muted);
    margin-top: var(--spacing-xs);
}

/* 图标 */
.icon-home::before { content: "🏠"; }
.icon-upload::before { content: "📤"; }
.icon-trophy::before { content: "🏆"; }
.icon-eye::before { content: "👁"; }
.icon-heart::before { content: "❤️"; }
.icon-mobile::before { content: "📱"; }
.icon-camera::before { content: "📷"; }
.icon-edit::before { content: "✏️"; }
.icon-refresh::before { content: "🔄"; }
.icon-close::before { content: "✕"; }
.icon-check-circle::before { content: "✅"; }
.icon-alert-circle::before { content: "⚠️"; }
.icon-plus::before { content: "+"; }
.icon-arrow-right::before { content: "→"; }
.icon-arrow-left::before { content: "←"; }
.icon-clock::before { content: "🕐"; }
.icon-calendar::before { content: "📅"; }
.icon-image::before { content: "🖼"; }
.icon-maximize::before { content: "⛶"; }
.icon-share::before { content: "📤"; }
.icon-moon::before { content: "🌙"; }
.icon-cloud-upload::before { content: "☁️"; }
.icon-trending-up::before { content: "📈"; }
.icon-activity::before { content: "📊"; }
.icon-server::before { content: "🖥"; }
.icon-zap::before { content: "⚡"; }
.icon-external-link::before { content: "🔗"; }
.icon-bar-chart::before { content: "📊"; }
.icon-list::before { content: "📋"; }
.icon-user::before { content: "👤"; }
.icon-lock::before { content: "🔒"; }
.icon-login::before { content: "🔑"; }
.icon-menu::before { content: "☰"; }
.icon-chevron-right::before { content: "›"; }
.icon-chevron-down::before { content: "⌄"; }
.icon-bell::before { content: "🔔"; }
.icon-log-out::before { content: "🚪"; }
.icon-settings::before { content: "⚙️"; }
.icon-shield::before { content: "🛡"; }
.icon-database::before { content: "💾"; }

/* 响应式设计 */
@media (max-width: 768px) {
    .navbar .container {
        flex-direction: column;
        gap: var(--spacing-md);
    }
    
    .nav-list {
        gap: var(--spacing-md);
    }
    
    .photo-grid {
        grid-template-columns: repeat(auto-fill, minmax(250px, 1fr));
        gap: var(--spacing-md);
    }
    
    .ranking-grid {
        grid-template-columns: 1fr;
    }
    
    .stats-grid {
        grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
        gap: var(--spacing-md);
    }
    
    .features-grid {
        grid-template-columns: 1fr;
        gap: var(--spacing-lg);
    }
    
    .section-title {
        font-size: 2rem;
    }
    
    .footer-content {
        grid-template-columns: 1fr;
        gap: var(--spacing-lg);
    }
}