/* 页面标题样式 */
.page-header {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    padding: 6rem 0 3rem;
    text-align: center;
    margin-top: 80px;
}

.page-header-content {
    max-width: 800px;
    margin: 0 auto;
    padding: 0 2rem;
}

.page-header h1 {
    font-size: 2.5rem;
    font-weight: 800;
    margin-bottom: 1rem;
    background: linear-gradient(45deg, #fff, #e0e7ff);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.page-header p {
    font-size: 1.125rem;
    margin-bottom: 1.5rem;
    opacity: 0.9;
}

.page-header .category-stats,
.page-header .tag-stats {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 2rem;
    flex-wrap: wrap;
}

.stat-item {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    background: rgba(255, 255, 255, 0.2);
    padding: 0.5rem 1rem;
    border-radius: 25px;
    font-size: 0.875rem;
}

.back-link {
    color: white;
    text-decoration: none;
    display: flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.5rem 1rem;
    border: 1px solid rgba(255, 255, 255, 0.3);
    border-radius: 25px;
    transition: all 0.3s ease;
}

.back-link:hover {
    background: rgba(255, 255, 255, 0.2);
    border-color: rgba(255, 255, 255, 0.5);
}

/* 分类卡片样式 */
.categories-section {
    margin-bottom: 3rem;
}

.categories-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(350px, 1fr));
    gap: 2rem;
}

.category-card {
    background: var(--card-bg);
    border-radius: 1rem;
    padding: 2rem;
    box-shadow: 0 4px 20px var(--shadow-color);
    transition: all 0.3s ease;
    border: 1px solid var(--border-color);
}

.category-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 8px 30px var(--shadow-color);
}

.category-icon {
    width: 60px;
    height: 60px;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 1.5rem;
}

.category-icon i {
    font-size: 1.5rem;
    color: white;
}

.category-name {
    font-size: 1.5rem;
    font-weight: 700;
    margin-bottom: 0.75rem;
    color: var(--text-primary);
}

.category-description {
    color: var(--text-secondary);
    margin-bottom: 1.5rem;
    line-height: 1.6;
}

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

.category-count {
    color: var(--text-secondary);
    font-size: 0.875rem;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.category-link {
    color: var(--accent-color);
    text-decoration: none;
    font-weight: 500;
    display: flex;
    align-items: center;
    gap: 0.5rem;
    transition: all 0.3s ease;
}

.category-link:hover {
    color: var(--accent-hover);
    transform: translateX(3px);
}

/* 标签卡片样式 */
.tags-section {
    margin-bottom: 3rem;
}

.tags-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(350px, 1fr));
    gap: 2rem;
}

.tag-card {
    background: var(--card-bg);
    border-radius: 1rem;
    padding: 2rem;
    box-shadow: 0 4px 20px var(--shadow-color);
    transition: all 0.3s ease;
    border: 1px solid var(--border-color);
}

.tag-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 8px 30px var(--shadow-color);
}

.tag-icon {
    width: 60px;
    height: 60px;
    background: linear-gradient(135deg, #f59e0b 0%, #d97706 100%);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 1.5rem;
}

.tag-icon i {
    font-size: 1.5rem;
    color: white;
}

.tag-name {
    font-size: 1.5rem;
    font-weight: 700;
    margin-bottom: 0.75rem;
    color: var(--text-primary);
}

.tag-description {
    color: var(--text-secondary);
    margin-bottom: 1.5rem;
    line-height: 1.6;
}

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

.tag-count {
    color: var(--text-secondary);
    font-size: 0.875rem;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.tag-link {
    color: var(--warning-color);
    text-decoration: none;
    font-weight: 500;
    display: flex;
    align-items: center;
    gap: 0.5rem;
    transition: all 0.3s ease;
}

.tag-link:hover {
    color: #d97706;
    transform: translateX(3px);
}

/* 快速导航样式 */
.quick-nav {
    list-style: none;
}

.quick-nav li {
    padding: 0.5rem 0;
    border-bottom: 1px solid var(--border-color);
}

.quick-nav li:last-child {
    border-bottom: none;
}

.quick-nav a {
    color: var(--text-secondary);
    text-decoration: none;
    display: flex;
    align-items: center;
    gap: 0.5rem;
    transition: color 0.3s ease;
}

.quick-nav a:hover {
    color: var(--accent-color);
}

/* 分类列表中的激活状态 */
.category-list a.active {
    color: var(--accent-color);
    font-weight: 600;
}

/* 标签云中的激活状态 */
.active-tag {
    background: linear-gradient(135deg, #f59e0b, #d97706) !important;
    color: white !important;
    border-color: #b45309 !important;
    text-shadow: 0 1px 3px rgba(0, 0, 0, 0.4) !important;
    box-shadow: 0 4px 12px rgba(245, 158, 11, 0.3) !important;
}

/* 无内容提示样式 */
.no-categories,
.no-tags {
    text-align: center;
    padding: 3rem;
    color: var(--text-secondary);
    font-size: 1.125rem;
}

/* 标签样式 */
.tag-high,
.tag-medium,
.tag-low {
    padding: 0.25rem 0.75rem;
    border-radius: 20px;
    font-size: 0.875rem;
    cursor: pointer;
    transition: all 0.3s ease;
    display: inline-block;
    margin: 0.125rem;
    text-decoration: none;
    border: 1px solid transparent;
    font-weight: 600;
}

.tag-high {
    background: linear-gradient(135deg, #667eea, #764ba2);
    color: white;
    border-color: #5a67d8;
    text-shadow: 0 1px 3px rgba(0, 0, 0, 0.4);
}

.tag-medium {
    background: linear-gradient(135deg, #f093fb, #f5576c);
    color: white;
    border-color: #e91e63;
    text-shadow: 0 1px 3px rgba(0, 0, 0, 0.4);
}

.tag-low {
    background: linear-gradient(135deg, #4facfe, #00f2fe);
    color: white;
    border-color: #2196f3;
    text-shadow: 0 1px 3px rgba(0, 0, 0, 0.4);
}

/* 当前活跃标签样式 */
.active-tag {
    background: linear-gradient(135deg, #f59e0b, #d97706) !important;
    color: white !important;
    border-color: #b45309 !important;
    text-shadow: 0 1px 3px rgba(0, 0, 0, 0.4) !important;
    box-shadow: 0 4px 12px rgba(245, 158, 11, 0.3) !important;
}

.tag-high:hover,
.tag-medium:hover,
.tag-low:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(0, 0, 0, 0.15);
    border-color: currentColor;
}

.tag-high:active,
.tag-medium:active,
.tag-low:active {
    transform: translateY(0);
    box-shadow: 0 3px 10px rgba(0, 0, 0, 0.1);
}

/* 为不同标签添加协调的颜色变体，确保文字清晰可读 */
.tag-high:nth-child(3n+1) {
    background: linear-gradient(135deg, #4c63d2, #6b46c1);
    border-color: #4338ca;
    color: white;
}

.tag-high:nth-child(3n+2) {
    background: linear-gradient(135deg, #dc2626, #b91c1c);
    border-color: #991b1b;
    color: white;
}

.tag-high:nth-child(3n+3) {
    background: linear-gradient(135deg, #059669, #047857);
    border-color: #065f46;
    color: white;
}

.tag-medium:nth-child(3n+1) {
    background: linear-gradient(135deg, #7c3aed, #6d28d9);
    border-color: #5b21b6;
    color: white;
}

.tag-medium:nth-child(3n+2) {
    background: linear-gradient(135deg, #ea580c, #c2410c);
    border-color: #9a3412;
    color: white;
}

.tag-medium:nth-child(3n+3) {
    background: linear-gradient(135deg, #0891b2, #0e7490);
    border-color: #155e75;
    color: white;
}

.tag-low:nth-child(3n+1) {
    background: linear-gradient(135deg, #f59e0b, #d97706);
    border-color: #b45309;
    color: white;
}

.tag-low:nth-child(3n+2) {
    background: linear-gradient(135deg, #ec4899, #db2777);
    border-color: #be185d;
    color: white;
}

.tag-low:nth-child(3n+3) {
    background: linear-gradient(135deg, #10b981, #059669);
    border-color: #047857;
    color: white;
}

/* 文章列表中的标签样式 */
.post-tags {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    flex-wrap: wrap;
}

.post-tags .tag-item {
    margin: 0;
}

.post-tags .tag-link {
    background: linear-gradient(135deg, var(--bg-tertiary), var(--border-color));
    color: var(--text-primary);
    padding: 0.25rem 0.75rem;
    border-radius: 20px;
    font-size: 0.75rem;
    font-weight: 500;
    text-decoration: none;
    border: 1px solid var(--border-color);
    transition: all 0.3s ease;
    display: inline-block;
    white-space: nowrap;
}

.post-tags .tag-link:hover {
    background: linear-gradient(135deg, var(--border-color), var(--text-muted));
    color: var(--text-primary);
    border-color: var(--text-muted);
    transform: translateY(-1px);
    box-shadow: 0 2px 8px var(--shadow-color);
}

.post-tags .tag-link:active {
    transform: translateY(0);
    box-shadow: 0 1px 4px var(--shadow-color);
}

/* 响应式设计 */
@media (max-width: 768px) {
    .page-header h1 {
        font-size: 2rem;
    }
    
    .page-header p {
        font-size: 1rem;
    }
    
    .page-header .category-stats,
    .page-header .tag-stats {
        flex-direction: column;
        gap: 1rem;
    }
    
    .categories-grid,
    .tags-grid {
        grid-template-columns: 1fr;
        gap: 1.5rem;
    }
    
    .category-card,
    .tag-card {
        padding: 1.5rem;
    }
}