/* ============================================
   historical-geo.css — 历史地理学子页面专用样式
   ============================================ */

/* ---- Hero ---- */
.hist-hero {
    min-height: 85vh;
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
    overflow: hidden;
    background: linear-gradient(160deg, #1a0a0a 0%, #3e1c1c 30%, #5d2e1e 60%, #2d1b10 100%);
    padding-top: 72px;
}

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

.hist-hero-content {
    position: relative;
    z-index: 2;
    text-align: center;
    color: white;
    max-width: 820px;
    padding: 0 var(--space-lg);
}

.hist-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;
}

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

.hist-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(0,0,0,0.4);
}

.hist-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;
}

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

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

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

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

.breadcrumb a {
    color: var(--color-text-secondary);
    transition: var(--transition-fast);
}

.breadcrumb a:hover {
    color: var(--color-secondary);
}

.breadcrumb .sep {
    opacity: 0.4;
}

.breadcrumb .current {
    color: var(--color-text);
    font-weight: 500;
}

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

.hist-overview-grid {
    display: grid;
    grid-template-columns: 1.3fr 1fr;
    gap: var(--space-3xl);
    align-items: start;
}

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

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

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

.hist-timeline-mini {
    margin-top: var(--space-xl);
    padding: var(--space-lg);
    background: var(--color-card);
    border-radius: var(--radius-lg);
    border: 1px solid var(--color-border-light);
}

.hist-timeline-mini h4 {
    font-family: var(--font-heading);
    font-size: 1rem;
    margin-bottom: var(--space-md);
    color: var(--color-text);
}

.mini-tl-row {
    display: flex;
    gap: var(--space-md);
    padding: var(--space-sm) 0;
    border-bottom: 1px solid var(--color-border-light);
    font-size: 0.875rem;
}

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

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

.mini-tl-event {
    color: var(--color-text-secondary);
}

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

.hist-overview-visual-inner {
    background: linear-gradient(135deg, #3e1c1c, #2d1b10);
    border-radius: var(--radius-xl);
    padding: var(--space-xl);
    width: 100%;
    max-width: 460px;
    box-shadow: var(--shadow-lg);
}

/* ---- Sub-fields ---- */
#hist-fields { background: var(--color-card); }

.fields-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: var(--space-xl);
}

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

.field-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);
}

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

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

.field-icon {
    width: 56px; height: 56px;
    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);
    font-size: 1.5rem;
}

.field-card:nth-child(2) .field-icon { background: linear-gradient(135deg, #E3F2FD, #BBDEFB); color: var(--color-secondary); }
.field-card:nth-child(3) .field-icon { background: linear-gradient(135deg, #FCE4EC, #F8BBD9); color: #C2185B; }
.field-card:nth-child(4) .field-icon { background: linear-gradient(135deg, #F3E5F5, #E1BEE7); color: #7B1FA2; }
.field-card:nth-child(5) .field-icon { background: linear-gradient(135deg, #E8F5E9, #C8E6C9); color: var(--color-primary); }
.field-card:nth-child(6) .field-icon { background: linear-gradient(135deg, #E0F2F1, #B2DFDB); color: #00796B; }
.field-card:nth-child(7) .field-icon { background: linear-gradient(135deg, #FFF8E1, #FFECB3); color: #F57F17; }
.field-card:nth-child(8) .field-icon { background: linear-gradient(135deg, #ECEFF1, #CFD8DC); color: #455A64; }

.field-card h3 {
    font-family: var(--font-heading);
    font-size: 1.125rem;
    margin-bottom: var(--space-sm);
    color: var(--color-text);
}

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

/* ---- Data Charts Section ---- */
#hist-data { background: var(--color-bg); }

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

.hist-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;
}

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

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

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

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

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

.hist-chart-container {
    padding: var(--space-lg) var(--space-xl);
    min-height: 300px;
    display: flex;
    align-items: center;
    justify-content: center;
    flex: 1;
}

.hist-data-card.wide .hist-chart-container {
    min-height: 380px;
}

.hist-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;
}

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

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

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

/* ---- Ancient Capitals ---- */
#hist-capitals { background: var(--color-card); }

.capitals-grid {
    display: grid;
    grid-template-columns: repeat(7, 1fr);
    gap: var(--space-md);
}

.capital-card {
    background: var(--color-bg);
    border-radius: var(--radius-lg);
    padding: var(--space-lg);
    text-align: center;
    border: 1px solid var(--color-border-light);
    transition: var(--transition-base);
    position: relative;
}

.capital-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-md);
    border-color: var(--color-accent-light);
}

.capital-card .dynasty-tag {
    position: absolute;
    top: -1px; left: 50%;
    transform: translateX(-50%);
    background: var(--color-accent);
    color: white;
    font-size: 0.6875rem;
    font-weight: 600;
    padding: 2px 10px;
    border-radius: 0 0 var(--radius-sm) var(--radius-sm);
}

.capital-card .capital-name {
    font-family: var(--font-heading);
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--color-text);
    margin-top: var(--space-sm);
    margin-bottom: var(--space-xs);
}

.capital-card .capital-era {
    font-size: 0.8125rem;
    color: var(--color-text-muted);
    margin-bottom: var(--space-sm);
}

.capital-card .capital-desc {
    font-size: 0.8125rem;
    color: var(--color-text-secondary);
    line-height: 1.6;
}

/* ---- Scholars ---- */
#hist-scholars { background: var(--color-bg); }

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

.scholar-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);
    display: flex;
    gap: var(--space-lg);
    align-items: flex-start;
}

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

.scholar-avatar {
    width: 64px; height: 64px;
    border-radius: 50%;
    background: linear-gradient(135deg, var(--color-earth-light), var(--color-earth));
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-family: var(--font-heading);
    font-size: 1.5rem;
    font-weight: 700;
    flex-shrink: 0;
}

.scholar-info h4 {
    font-family: var(--font-heading);
    font-size: 1.0625rem;
    margin-bottom: var(--space-xs);
    color: var(--color-text);
}

.scholar-info .scholar-years {
    font-size: 0.8125rem;
    color: var(--color-text-muted);
    margin-bottom: var(--space-sm);
}

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

/* ---- Literature ---- */
#hist-literature { background: var(--color-card); }

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

.lit-card {
    display: flex;
    gap: var(--space-lg);
    background: var(--color-bg);
    border-radius: var(--radius-lg);
    padding: var(--space-lg);
    border: 1px solid var(--color-border-light);
    transition: var(--transition-base);
}

.lit-card:hover {
    box-shadow: var(--shadow-sm);
    border-color: var(--color-border);
}

.lit-index {
    width: 48px; height: 48px;
    border-radius: var(--radius-md);
    background: linear-gradient(135deg, var(--color-earth-light), var(--color-earth));
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-family: var(--font-heading);
    font-size: 1.25rem;
    font-weight: 700;
    flex-shrink: 0;
}

.lit-info h4 {
    font-family: var(--font-heading);
    font-size: 1.0625rem;
    margin-bottom: var(--space-xs);
    color: var(--color-text);
}

.lit-info .lit-era {
    font-size: 0.8125rem;
    color: var(--color-accent);
    font-weight: 600;
    margin-bottom: var(--space-sm);
}

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

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

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

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

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

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

.hist-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;
}

.hist-knowledge-term {
    font-family: var(--font-heading);
    font-size: 1.125rem;
    font-weight: 600;
    color: var(--color-text);
    margin-bottom: var(--space-xs);
}

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

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

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

.hist-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;
}

/* ---- Responsive ---- */
@media (min-width: 1024px) and (max-width: 1439px) {
    .hist-overview-grid { grid-template-columns: 1fr; gap: var(--space-2xl); }
    .hist-overview-visual { order: -1; }
    .fields-grid { grid-template-columns: repeat(2, 1fr); }
    .hist-data-grid { grid-template-columns: repeat(2, 1fr); }
    .hist-data-card.wide { grid-column: span 2; }
    .capitals-grid { grid-template-columns: repeat(4, 1fr); }
    .scholars-grid { grid-template-columns: repeat(2, 1fr); }
    .lit-grid { grid-template-columns: 1fr; }
    .hist-knowledge-grid { grid-template-columns: repeat(2, 1fr); }
}

@media (min-width: 768px) and (max-width: 1023px) {
    .hist-overview-grid { grid-template-columns: 1fr; gap: var(--space-2xl); }
    .hist-overview-visual { order: -1; }
    .fields-grid { grid-template-columns: repeat(2, 1fr); gap: var(--space-lg); }
    .hist-data-grid { grid-template-columns: 1fr; }
    .hist-data-card.wide { grid-column: span 1; }
    .capitals-grid { grid-template-columns: repeat(3, 1fr); }
    .scholars-grid { grid-template-columns: 1fr; }
    .lit-grid { grid-template-columns: 1fr; }
    .hist-knowledge-grid { grid-template-columns: 1fr; }
    .hist-hero-meta { gap: var(--space-lg); }
}

@media (max-width: 767px) {
    .hist-overview-grid { grid-template-columns: 1fr; gap: var(--space-xl); }
    .hist-overview-visual { order: -1; }
    .fields-grid { grid-template-columns: 1fr; gap: var(--space-lg); }
    .hist-data-grid { grid-template-columns: 1fr; }
    .hist-data-card.wide { grid-column: span 1; }
    .hist-chart-container { min-height: 260px !important; }
    .capitals-grid { grid-template-columns: repeat(2, 1fr); }
    .scholars-grid { grid-template-columns: 1fr; }
    .lit-grid { grid-template-columns: 1fr; }
    .hist-knowledge-grid { grid-template-columns: 1fr; }
    .hist-hero-meta { flex-direction: column; gap: var(--space-sm); }
    .scholar-card { flex-direction: column; align-items: center; text-align: center; }
}

@media (max-width: 479px) {
    .field-card { padding: var(--space-xl); }
    .hist-data-header { padding: var(--space-md); }
    .hist-chart-container { padding: var(--space-md); }
    .hist-data-insight { padding: var(--space-md); }
    .capital-card { padding: var(--space-md); }
    .scholar-card { padding: var(--space-lg); }
    .lit-card { flex-direction: column; align-items: center; text-align: center; }
    .hist-knowledge-card { padding: var(--space-lg); }
}