/* ============================================
   human-geo.css — 人文地理栏目专用样式
   ============================================ */

/* ---- Column Hero ---- */
.column-hero {
    min-height: 85vh;
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
    overflow: hidden;
    background: linear-gradient(160deg, #1a0a2e 0%, #2d1b4e 30%, #1a3a5c 60%, #0d2137 100%);
    padding-top: 72px;
}

.column-hero-canvas {
    position: absolute;
    top: 0; left: 0;
    width: 100%; height: 100%;
    z-index: 1;
}

.column-hero-content {
    position: relative;
    z-index: 2;
    text-align: center;
    color: white;
    max-width: 800px;
    padding: 0 var(--space-lg);
}

.column-hero-badge {
    display: inline-flex;
    align-items: center;
    gap: var(--space-sm);
    background: rgba(255,255,255,0.08);
    backdrop-filter: blur(8px);
    border: 1px solid rgba(255,255,255,0.12);
    padding: var(--space-xs) var(--space-md);
    border-radius: var(--radius-full);
    font-size: 0.875rem;
    margin-bottom: var(--space-xl);
    letter-spacing: 0.08em;
    text-transform: uppercase;
}

.column-hero-badge .dot {
    width: 8px; height: 8px;
    background: var(--color-accent-light);
    border-radius: 50%;
    animation: pulse 2s infinite;
}

.column-hero-title {
    font-family: var(--font-heading);
    font-size: clamp(2.5rem, 6vw, 4.5rem);
    font-weight: 900;
    line-height: 1.1;
    margin-bottom: var(--space-lg);
    text-shadow: 0 2px 20px rgba(0,0,0,0.3);
}

.column-hero-subtitle {
    font-size: clamp(1rem, 2vw, 1.25rem);
    color: rgba(255,255,255,0.75);
    margin-bottom: var(--space-2xl);
    line-height: 1.8;
    max-width: 640px;
    margin-left: auto;
    margin-right: auto;
}

.column-hero-meta {
    display: flex;
    gap: var(--space-xl);
    justify-content: center;
    flex-wrap: wrap;
}

.column-hero-meta .meta-item {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
    color: rgba(255,255,255,0.6);
    font-size: 0.9375rem;
}

/* ---- Column Overview ---- */
#column-overview { background: var(--color-bg); }

.overview-grid {
    display: grid;
    grid-template-columns: 1.2fr 1fr;
    gap: var(--space-3xl);
    align-items: center;
}

.overview-text h2 {
    font-family: var(--font-heading);
    font-size: clamp(1.5rem, 3vw, 2rem);
    margin-bottom: var(--space-sm);
    color: var(--color-text);
}

.overview-text p {
    color: var(--color-text-secondary);
    line-height: 1.9;
    margin-bottom: var(--space-md);
    font-size: 0.9375rem;
}

.overview-text p strong {
    color: var(--color-text);
}

.overview-tags {
    display: flex;
    flex-wrap: wrap;
    gap: var(--space-xs);
    margin-top: var(--space-lg);
}

.overview-tag {
    background: var(--color-sky);
    color: var(--color-secondary-dark);
    padding: 6px 14px;
    border-radius: var(--radius-full);
    font-size: 0.8125rem;
    font-weight: 500;
}

.overview-visual {
    display: flex;
    justify-content: center;
}

.overview-visual-inner {
    background: linear-gradient(135deg, #1a3a5c, #0d2137);
    border-radius: var(--radius-xl);
    padding: var(--space-xl);
    width: 100%;
    max-width: 420px;
    box-shadow: var(--shadow-lg);
}

.overview-svg {
    width: 100%;
    height: auto;
}

.visual-caption {
    text-align: center;
    color: rgba(255,255,255,0.5);
    font-size: 0.8125rem;
    margin-top: var(--space-sm);
    font-style: italic;
}

/* ---- Subcategory Grid ---- */
#subcategories { background: var(--color-card); }

.subcategory-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--space-xl);
}

.subcategory-card {
    background: var(--color-bg);
    border-radius: var(--radius-xl);
    padding: var(--space-2xl);
    border: 1px solid var(--color-border-light);
    transition: var(--transition-base);
    position: relative;
    overflow: hidden;
}

.subcategory-card::before {
    content: '';
    position: absolute;
    top: 0; left: 0; right: 0;
    height: 4px;
    background: linear-gradient(90deg, var(--color-earth), var(--color-accent));
    opacity: 0;
    transition: var(--transition-base);
}

.subcategory-card:hover {
    transform: translateY(-6px);
    box-shadow: var(--shadow-lg);
    border-color: transparent;
}

.subcategory-card:hover::before { opacity: 1; }

.subcategory-icon {
    width: 64px; height: 64px;
    border-radius: var(--radius-lg);
    background: linear-gradient(135deg, #FFF3E0, #FFE0B2);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--color-accent);
    margin-bottom: var(--space-lg);
}

.subcategory-card:nth-child(2) .subcategory-icon { background: linear-gradient(135deg, #E3F2FD, #BBDEFB); color: var(--color-secondary); }
.subcategory-card:nth-child(3) .subcategory-icon { background: linear-gradient(135deg, #FCE4EC, #F8BBD9); color: #C2185B; }
.subcategory-card:nth-child(4) .subcategory-icon { background: linear-gradient(135deg, #F3E5F5, #E1BEE7); color: #7B1FA2; }
.subcategory-card:nth-child(5) .subcategory-icon { background: linear-gradient(135deg, #E8F5E9, #C8E6C9); color: var(--color-primary); }
.subcategory-card:nth-child(6) .subcategory-icon { background: linear-gradient(135deg, #E0F2F1, #B2DFDB); color: #00796B; }

.subcategory-card h3 {
    font-family: var(--font-heading);
    font-size: 1.25rem;
    margin-bottom: var(--space-sm);
    color: var(--color-text);
}

.subcategory-card p {
    color: var(--color-text-secondary);
    font-size: 0.9375rem;
    line-height: 1.7;
    margin-bottom: var(--space-md);
}

.subcategory-stats {
    display: flex;
    gap: var(--space-md);
    margin-bottom: var(--space-lg);
}

.subcategory-stats span {
    font-size: 0.8125rem;
    color: var(--color-text-muted);
}

.subcategory-tags {
    display: flex;
    flex-wrap: wrap;
    gap: var(--space-xs);
    margin-bottom: var(--space-lg);
}

.sub-tag {
    background: var(--color-sky);
    color: var(--color-secondary-dark);
    padding: 4px 10px;
    border-radius: var(--radius-full);
    font-size: 0.75rem;
    font-weight: 500;
}

.subcategory-link {
    display: inline-flex;
    align-items: center;
    gap: 4px;
    color: var(--color-secondary);
    font-weight: 600;
    font-size: 0.9375rem;
}

.subcategory-link:hover { gap: 8px; }

/* ---- Data Spotlight ---- */
#data-spotlight { background: var(--color-bg); }

.data-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: var(--space-xl);
}

.data-card {
    background: var(--color-card);
    border-radius: var(--radius-xl);
    border: 1px solid var(--color-border-light);
    overflow: hidden;
    transition: var(--transition-base);
    display: flex;
    flex-direction: column;
}

.data-card:hover {
    box-shadow: var(--shadow-md);
}

.data-card-large {
    grid-column: span 1;
}

.data-card-wide {
    grid-column: span 2;
}

.data-card-header {
    padding: var(--space-lg) var(--space-xl) var(--space-sm);
    border-bottom: 1px solid var(--color-border-light);
}

.data-card-header h3 {
    font-family: var(--font-heading);
    font-size: 1.0625rem;
    color: var(--color-text);
    margin-bottom: var(--space-xs);
}

.data-source {
    font-size: 0.75rem;
    color: var(--color-text-muted);
}

/* === 修复核心：图表容器与 Canvas 尺寸 === */
.data-chart-container {
    padding: var(--space-lg) var(--space-xl);
    min-height: 340px;
    display: flex;
    align-items: center;
    justify-content: center;
    flex: 1;
    overflow: visible;
}

.data-chart-container canvas {
    width: 100%;
    height: auto;
    display: block;
    max-width: 100%;
}

.data-card-large .data-chart-container {
    min-height: 360px;
}

.data-card-wide .data-chart-container {
    min-height: 400px;
}

.data-insight {
    display: flex;
    gap: var(--space-sm);
    padding: var(--space-md) var(--space-xl);
    background: var(--color-sky);
    border-top: 1px solid var(--color-border-light);
    margin-top: auto;
}

.data-insight svg {
    flex-shrink: 0;
    color: var(--color-secondary);
    margin-top: 2px;
}

.data-insight p {
    font-size: 0.875rem;
    color: var(--color-text-secondary);
    line-height: 1.7;
    margin-bottom: 0;
}

.data-insight p strong {
    color: var(--color-text);
}

/* Silk Road Timeline */
.silk-road-timeline {
    padding: var(--space-lg) var(--space-xl);
    max-height: 320px;
    overflow-y: auto;
    flex: 1;
}

.timeline-row {
    display: flex;
    gap: var(--space-md);
    padding: var(--space-sm) 0;
    border-bottom: 1px solid var(--color-border-light);
}

.timeline-row:last-child { border-bottom: none; }

.tl-year {
    font-family: var(--font-mono);
    font-size: 0.8125rem;
    font-weight: 600;
    color: var(--color-accent);
    min-width: 70px;
    flex-shrink: 0;
}

.tl-event {
    font-size: 0.875rem;
    color: var(--color-text-secondary);
}

/* Aging Legend */
.aging-legend {
    display: flex;
    gap: var(--space-lg);
    padding: 0 var(--space-xl) var(--space-md);
    flex-wrap: wrap;
    justify-content: center;
}

.legend-item {
    display: flex;
    align-items: center;
    gap: var(--space-xs);
    font-size: 0.8125rem;
    color: var(--color-text-secondary);
}

.legend-color {
    width: 16px; height: 16px;
    border-radius: var(--radius-sm);
}

/* ---- Featured Articles ---- */
#featured-articles { background: var(--color-card); }

.articles-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: var(--space-xl);
}

.featured-article {
    background: var(--color-bg);
    border-radius: var(--radius-xl);
    overflow: hidden;
    border: 1px solid var(--color-border-light);
    transition: var(--transition-base);
}

.featured-article:hover {
    box-shadow: var(--shadow-md);
    transform: translateY(-4px);
}

.featured-article-large {
    grid-column: span 2;
    display: grid;
    grid-template-columns: 1.2fr 1fr;
}

.article-hero-img {
    width: 100%;
    height: 100%;
    min-height: 280px;
    object-fit: cover;
}

.article-hero-body {
    padding: var(--space-2xl);
    display: flex;
    flex-direction: column;
    justify-content: center;
}

.article-hero-body h3 {
    font-family: var(--font-heading);
    font-size: 1.375rem;
    margin-bottom: var(--space-md);
    line-height: 1.4;
    color: var(--color-text);
}

.article-hero-body p {
    color: var(--color-text-secondary);
    font-size: 0.9375rem;
    line-height: 1.8;
    margin-bottom: var(--space-lg);
}

.article-hero-body .article-tags {
    margin-bottom: var(--space-lg);
}

.article-read-more {
    display: inline-flex;
    align-items: center;
    gap: var(--space-sm);
    color: var(--color-secondary);
    font-weight: 600;
    font-size: 0.9375rem;
    margin-top: auto;
}

.article-read-more:hover { gap: var(--space-md); }

.featured-article .article-thumb {
    width: 100%;
    aspect-ratio: 16/10;
    object-fit: cover;
}

.featured-article .article-body {
    padding: var(--space-lg);
}

.featured-article h4 {
    font-family: var(--font-heading);
    font-size: 1.0625rem;
    margin-bottom: var(--space-sm);
    line-height: 1.4;
    color: var(--color-text);
}

.featured-article .article-body p {
    font-size: 0.875rem;
    color: var(--color-text-secondary);
    line-height: 1.7;
    margin-bottom: var(--space-md);
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.article-tags {
    display: flex;
    flex-wrap: wrap;
    gap: var(--space-xs);
}

.article-tags span {
    background: var(--color-sky);
    color: var(--color-secondary-dark);
    padding: 3px 10px;
    border-radius: var(--radius-full);
    font-size: 0.75rem;
    font-weight: 500;
}

/* ---- Knowledge Cards ---- */
#knowledge-cards { background: var(--color-bg); }

.knowledge-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--space-xl);
}

.knowledge-card {
    background: var(--color-card);
    border-radius: var(--radius-xl);
    padding: var(--space-xl);
    border: 1px solid var(--color-border-light);
    transition: var(--transition-base);
    position: relative;
}

.knowledge-card:hover {
    box-shadow: var(--shadow-md);
    border-color: var(--color-primary-light);
}

.knowledge-card::before {
    content: '';
    position: absolute;
    top: 0; left: 0; right: 0;
    height: 3px;
    background: linear-gradient(90deg, var(--color-earth), var(--color-accent));
    border-radius: var(--radius-xl) var(--radius-xl) 0 0;
    opacity: 0.6;
}

.knowledge-term {
    font-family: var(--font-heading);
    font-size: 1.25rem;
    font-weight: 600;
    color: var(--color-text);
    margin-bottom: var(--space-xs);
}

.knowledge-phonetic {
    font-family: var(--font-mono);
    font-size: 0.8125rem;
    color: var(--color-text-muted);
    margin-bottom: var(--space-md);
    font-style: italic;
}

.knowledge-def {
    font-size: 0.875rem;
    color: var(--color-text-secondary);
    line-height: 1.8;
    margin-bottom: var(--space-md);
}

.knowledge-tags {
    display: flex;
    gap: var(--space-xs);
}

.knowledge-tags span {
    background: var(--color-sky);
    color: var(--color-secondary-dark);
    padding: 3px 10px;
    border-radius: var(--radius-full);
    font-size: 0.75rem;
    font-weight: 500;
}

/* ---- Related Tracks ---- */
#related-tracks { background: var(--color-card); }

/* ---- Responsive ---- */
@media (min-width: 1024px) and (max-width: 1439px) {
    .overview-grid { grid-template-columns: 1fr; gap: var(--space-2xl); }
    .overview-visual { order: -1; }
    .subcategory-grid { grid-template-columns: repeat(2, 1fr); }
    .data-grid { grid-template-columns: repeat(2, 1fr); }
    .data-card-wide { grid-column: span 2; }
    .data-card-large { grid-column: span 1; }
    .articles-grid { grid-template-columns: 1fr; }
    .featured-article-large { grid-template-columns: 1fr; }
    .knowledge-grid { grid-template-columns: repeat(2, 1fr); }
}

@media (min-width: 768px) and (max-width: 1023px) {
    .overview-grid { grid-template-columns: 1fr; gap: var(--space-2xl); }
    .overview-visual { order: -1; }
    .subcategory-grid { grid-template-columns: repeat(2, 1fr); gap: var(--space-lg); }
    .data-grid { grid-template-columns: 1fr; }
    .data-card-large, .data-card-wide { grid-column: span 1; }
    .articles-grid { grid-template-columns: 1fr; }
    .featured-article-large { grid-template-columns: 1fr; }
    .knowledge-grid { grid-template-columns: 1fr; }
    .column-hero-meta { gap: var(--space-lg); }
}

@media (max-width: 767px) {
    .overview-grid { grid-template-columns: 1fr; gap: var(--space-xl); }
    .overview-visual { order: -1; }
    .subcategory-grid { grid-template-columns: 1fr; gap: var(--space-lg); }
    .data-grid { grid-template-columns: 1fr; }
    .data-card-large, .data-card-wide { grid-column: span 1; }
    .data-chart-container { min-height: 300px !important; padding: var(--space-md); }
    .data-card-large .data-chart-container { min-height: 320px !important; }
    .data-card-wide .data-chart-container { min-height: 340px !important; }
    .articles-grid { grid-template-columns: 1fr; }
    .featured-article-large { grid-template-columns: 1fr; }
    .article-hero-img { min-height: 200px; }
    .knowledge-grid { grid-template-columns: 1fr; }
    .column-hero-meta { flex-direction: column; gap: var(--space-sm); }
    .aging-legend { gap: var(--space-sm); }
}

@media (max-width: 479px) {
    .subcategory-card { padding: var(--space-xl); }
    .data-card-header { padding: var(--space-md); }
    .data-chart-container { padding: var(--space-sm); min-height: 280px !important; }
    .data-card-large .data-chart-container { min-height: 300px !important; }
    .data-card-wide .data-chart-container { min-height: 320px !important; }
    .data-insight { padding: var(--space-md); }
    .article-hero-body { padding: var(--space-lg); }
    .silk-road-timeline { padding: var(--space-md); }
    .knowledge-card { padding: var(--space-lg); }
}