/* ============================================
   geology.css — 大地构造栏目专属样式
   ============================================ */

/* ---- Column Hero ---- */
.column-hero {
    min-height: 70vh;
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
    overflow: hidden;
    background: linear-gradient(160deg, #1a1a2e 0%, #16213e 40%, #0f3460 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-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;
    color: rgba(255,255,255,0.7);
    text-transform: uppercase;
}

.column-hero-content h1 {
    font-family: var(--font-heading);
    font-size: clamp(2.5rem, 6vw, 4rem);
    font-weight: 900;
    line-height: 1.15;
    margin-bottom: var(--space-lg);
    text-shadow: 0 2px 20px rgba(0,0,0,0.4);
}

.column-hero-content p {
    font-size: clamp(1rem, 2vw, 1.25rem);
    color: rgba(255,255,255,0.75);
    line-height: 1.8;
    max-width: 640px;
    margin: 0 auto;
}

/* ---- Breadcrumb ---- */
.breadcrumb {
    background: var(--color-card);
    border-bottom: 1px solid var(--color-border-light);
    padding: var(--space-sm) 0;
}

.breadcrumb-inner {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
    font-size: 0.875rem;
    color: var(--color-text-muted);
}

.breadcrumb-inner a { color: var(--color-text-secondary); }
.breadcrumb-inner a:hover { color: var(--color-secondary); }
.breadcrumb-inner .sep { opacity: 0.4; }
.breadcrumb-inner .current { color: var(--color-text); font-weight: 500; }

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

.overview-text h3 {
    font-family: var(--font-heading);
    font-size: 1.75rem;
    margin-bottom: var(--space-lg);
    color: var(--color-text);
}

.overview-text p {
    color: var(--color-text-secondary);
    line-height: 1.9;
    margin-bottom: var(--space-md);
    font-size: 1rem;
}

.overview-stats-mini {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: var(--space-lg);
    margin-top: var(--space-xl);
}

.overview-stat-mini {
    background: var(--color-bg);
    border-radius: var(--radius-lg);
    padding: var(--space-lg);
    border: 1px solid var(--color-border-light);
}

.overview-stat-mini .num {
    font-family: var(--font-heading);
    font-size: 1.75rem;
    font-weight: 700;
    color: var(--color-primary);
    line-height: 1;
}

.overview-stat-mini .label {
    font-size: 0.8125rem;
    color: var(--color-text-muted);
    margin-top: var(--space-xs);
}

.overview-visual {
    position: relative;
    background: linear-gradient(135deg, #0a1628, #1a3a5c);
    border-radius: var(--radius-xl);
    overflow: hidden;
    height: 460px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.overview-visual canvas {
    width: 100%;
    height: 100%;
    display: block;
}

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

.subcategory-card {
    background: var(--color-card);
    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-primary), var(--color-secondary));
    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);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.75rem;
    margin-bottom: var(--space-lg);
}

.subcategory-card:nth-child(1) .subcategory-icon { background: linear-gradient(135deg, #E8F5E9, #C8E6C9); }
.subcategory-card:nth-child(2) .subcategory-icon { background: linear-gradient(135deg, #FFEBEE, #FFCDD2); }
.subcategory-card:nth-child(3) .subcategory-icon { background: linear-gradient(135deg, #E3F2FD, #BBDEFB); }
.subcategory-card:nth-child(4) .subcategory-icon { background: linear-gradient(135deg, #F3E5F5, #E1BEE7); }
.subcategory-card:nth-child(5) .subcategory-icon { background: linear-gradient(135deg, #FFF3E0, #FFE0B2); }
.subcategory-card:nth-child(6) .subcategory-icon { background: linear-gradient(135deg, #E0F7FA, #B2EBF2); }

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

.subcategory-topics 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;
}

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

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

/* ---- Data Spotlight ---- */
.data-spotlight-grid {
    display: grid;
    grid-template-columns: 2fr 2fr;
    gap: var(--space-xl);
    margin-bottom: var(--space-2xl);
}

.data-spotlight-grid.reverse {
    grid-template-columns: 1fr 2fr;
}

.data-card {
    background: var(--color-card);
    border-radius: var(--radius-xl);
    border: 1px solid var(--color-border-light);
    overflow: hidden;
}

.data-card-header {
    padding: var(--space-lg) var(--space-xl);
    border-bottom: 1px solid var(--color-border-light);
    display: flex;
    align-items: center;
    justify-content: space-between;
    flex-wrap: wrap;
    gap: var(--space-sm);
}

.data-card-header h3 {
    font-family: var(--font-heading);
    font-size: 1.125rem;
    color: var(--color-text);
}

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

.data-card-body {
    padding: var(--space-xl);
}

.data-canvas-wrap {
    width: 100%;
    height: 480px;
    position: relative;
}

.data-canvas-wrap canvas {
    width: 100%;
    height: 100%;
    display: block;
}

/* Data table */
.data-table-wrap {
    overflow-x: auto;
}

.data-table {
    width: 100%;
    border-collapse: collapse;
    font-size: 0.9375rem;
}

.data-table th,
.data-table td {
    padding: var(--space-sm) var(--space-md);
    text-align: left;
    border-bottom: 1px solid var(--color-border-light);
}

.data-table th {
    font-weight: 600;
    color: var(--color-text-secondary);
    font-size: 0.8125rem;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    background: var(--color-bg);
}

.data-table td {
    color: var(--color-text);
}

.data-table tr:hover td {
    background: var(--color-sky);
}

.data-table .num-cell {
    font-family: var(--font-mono);
    font-weight: 600;
    color: var(--color-primary);
}

/* ---- Featured Articles ---- */
.featured-articles-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--space-xl);
}

/* ---- Related Tracks ---- */
.related-tracks-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: var(--space-xl);
}

.track-card-large {
    position: relative;
    border-radius: var(--radius-xl);
    overflow: hidden;
    aspect-ratio: 16/9;
    cursor: pointer;
    transition: var(--transition-base);
}

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

.track-card-large .track-img {
    width: 100%; height: 100%;
    object-fit: cover;
    transition: transform var(--transition-slow);
}

.track-card-large:hover .track-img { transform: scale(1.05); }

.track-card-large .track-overlay {
    position: absolute;
    inset: 0;
    background: linear-gradient(to top, rgba(0,0,0,0.8) 0%, rgba(0,0,0,0.2) 50%, transparent 100%);
    display: flex;
    flex-direction: column;
    justify-content: flex-end;
    padding: var(--space-2xl);
    color: white;
}

.track-card-large .track-region {
    font-size: 0.875rem;
    color: rgba(255,255,255,0.7);
    margin-bottom: var(--space-xs);
    letter-spacing: 0.05em;
}

.track-card-large .track-name {
    font-family: var(--font-heading);
    font-size: 1.5rem;
    font-weight: 600;
    margin-bottom: var(--space-sm);
}

.track-card-large .track-desc {
    font-size: 0.9375rem;
    color: rgba(255,255,255,0.7);
    line-height: 1.6;
}

/* ---- Responsive ---- */
@media (max-width: 1023px) {
    .overview-grid { grid-template-columns: 1fr; }
    .subcategory-grid { grid-template-columns: repeat(2, 1fr); }
    .data-spotlight-grid,
    .data-spotlight-grid.reverse { grid-template-columns: 1fr; }
    .featured-articles-grid { grid-template-columns: repeat(2, 1fr); }
    .related-tracks-grid { grid-template-columns: 1fr; }
    .overview-visual { height: 380px; }
    .data-canvas-wrap { height: 320px; }
}

@media (max-width: 767px) {
    .subcategory-grid { grid-template-columns: 1fr; }
    .featured-articles-grid { grid-template-columns: 1fr; }
    .overview-stats-mini { grid-template-columns: 1fr; }
    .column-hero { min-height: 50vh; }
    .overview-visual { height: 300px; }
    .data-canvas-wrap { height: 260px; }
}