/* ============================================
   wetlands.css — 湿地生态页面专用样式
   ============================================ */

/* ---- Wetland Hero ---- */
.wetland-hero {
    min-height: 75vh;
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
    overflow: hidden;
    background: linear-gradient(160deg, #0d3328 0%, #1b5e20 30%, #2e7d32 60%, #66bb6a 100%);
    padding-top: 72px;
}

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

.wetland-hero-content {
    position: relative;
    z-index: 2;
    text-align: center;
    color: white;
    max-width: 860px;
    padding: 0 var(--space-lg);
}

.wetland-hero-badge {
    display: inline-flex;
    align-items: center;
    gap: var(--space-sm);
    background: rgba(255,255,255,0.1);
    backdrop-filter: blur(8px);
    border: 1px solid rgba(255,255,255,0.2);
    padding: var(--space-xs) var(--space-md);
    border-radius: var(--radius-full);
    font-size: 0.875rem;
    margin-bottom: var(--space-xl);
    letter-spacing: 0.05em;
}

.wetland-hero-badge .dot {
    width: 8px; height: 8px;
    background: #a5d6a7;
    border-radius: 50%;
    animation: pulse 2s infinite;
}

.wetland-hero-title {
    font-family: var(--font-heading);
    font-size: clamp(2rem, 5vw, 3.5rem);
    font-weight: 900;
    line-height: 1.2;
    margin-bottom: var(--space-md);
    text-shadow: 0 2px 20px rgba(0,0,0,0.3);
}

.wetland-hero-title .highlight {
    background: linear-gradient(135deg, #a5d6a7, #81c784);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.wetland-hero-subtitle {
    font-size: clamp(1rem, 2vw, 1.125rem);
    color: rgba(255,255,255,0.85);
    margin-bottom: var(--space-xl);
    line-height: 1.8;
    max-width: 720px;
    margin-left: auto;
    margin-right: auto;
}

.wetland-hero-stats {
    display: flex;
    justify-content: center;
    gap: var(--space-2xl);
    flex-wrap: wrap;
}

.wetland-hero-stat {
    text-align: center;
}

.wetland-hero-stat .num {
    font-family: var(--font-heading);
    font-size: 2.25rem;
    font-weight: 700;
    color: #a5d6a7;
    display: block;
    line-height: 1;
}

.wetland-hero-stat .label {
    font-size: 0.8125rem;
    color: rgba(255,255,255,0.65);
    margin-top: 6px;
    max-width: 140px;
    display: inline-block;
}

/* ---- Wetland Definition ---- */
.wetland-definition {
    background: var(--color-card);
    padding: var(--space-4xl) 0;
}

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

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

.definition-text p {
    color: var(--color-text-secondary);
    line-height: 1.8;
    margin-bottom: var(--space-md);
}

.definition-features {
    margin: var(--space-lg) 0;
    padding-left: var(--space-lg);
}

.definition-features li {
    color: var(--color-text-secondary);
    line-height: 1.8;
    margin-bottom: var(--space-sm);
    position: relative;
    padding-left: var(--space-md);
}

.definition-features li::before {
    content: '';
    position: absolute;
    left: 0;
    top: 10px;
    width: 6px;
    height: 6px;
    background: var(--color-primary);
    border-radius: 50%;
}

.definition-visual {
    position: sticky;
    top: 100px;
}

.wetland-diagram {
    background: linear-gradient(135deg, #E8F5E9, #C8E6C9);
    border-radius: var(--radius-xl);
    padding: var(--space-xl);
    min-height: 360px;
}

.definition-caption {
    text-align: center;
    font-size: 0.8125rem;
    color: var(--color-text-muted);
    margin-top: var(--space-md);
}

/* ---- Wetland Types ---- */
.wetland-types {
    background: var(--color-bg);
    padding: var(--space-4xl) 0;
}

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

.type-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);
    display: flex;
    gap: var(--space-xl);
    align-items: flex-start;
}

.type-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-lg);
    border-color: transparent;
}

.type-icon {
    width: 64px; height: 64px;
    border-radius: var(--radius-lg);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 2rem;
    flex-shrink: 0;
    background: linear-gradient(135deg, #E8F5E9, #C8E6C9);
}

.type-content { flex: 1; }

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

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

.type-data {
    display: flex;
    gap: var(--space-lg);
    margin-bottom: var(--space-md);
    padding: var(--space-md);
    background: var(--color-bg);
    border-radius: var(--radius-lg);
}

.type-data-item {
    text-align: center;
}

.type-data-num {
    font-family: var(--font-heading);
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--color-primary);
    display: block;
}

.type-data-label {
    font-size: 0.75rem;
    color: var(--color-text-muted);
    margin-top: 2px;
}

.type-examples {
    font-size: 0.8125rem;
    color: var(--color-text-secondary);
    line-height: 1.6;
    padding-top: var(--space-sm);
    border-top: 1px solid var(--color-border-light);
}

.type-examples strong {
    color: var(--color-text);
}

/* ---- Distribution ---- */
.wetland-distribution {
    background: var(--color-card);
    padding: var(--space-4xl) 0;
}

.distribution-grid {
    display: grid;
    grid-template-columns: 1.1fr 1fr;
    gap: var(--space-3xl);
    align-items: start;
}

.distribution-map .chart-container {
    background: var(--color-bg);
    border-radius: var(--radius-xl);
    border: 1px solid var(--color-border-light);
    padding: var(--space-md);
    width: 100%;
    height: 100%;
    min-height: 420px;
    box-sizing: border-box;
}

.distribution-map .chart-container canvas {
    width: 100% !important;
    height: 100% !important;
    display: block;
    border-radius: var(--radius-lg);
}

.distribution-info {
    display: flex;
    flex-direction: column;
    gap: var(--space-xl);
}

.dist-region h4 {
    font-family: var(--font-heading);
    font-size: 1.0625rem;
    margin-bottom: var(--space-sm);
    color: var(--color-text);
    display: flex;
    align-items: center;
    gap: var(--space-sm);
}

.dist-region p {
    color: var(--color-text-secondary);
    font-size: 0.9375rem;
    line-height: 1.7;
    margin-bottom: 0;
}

/* ---- Functions ---- */
.wetland-functions {
    background: var(--color-bg);
    padding: var(--space-4xl) 0;
}

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

.function-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);
}

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

.function-icon {
    width: 56px; height: 56px;
    border-radius: var(--radius-lg);
    background: var(--color-sky);
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: var(--space-md);
}

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

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

.function-stat {
    display: inline-flex;
    align-items: baseline;
    gap: var(--space-sm);
    padding: var(--space-sm) var(--space-md);
    background: linear-gradient(135deg, #E8F5E9, #C8E6C9);
    border-radius: var(--radius-lg);
}

.function-stat-num {
    font-family: var(--font-heading);
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--color-primary);
}

.function-stat-label {
    font-size: 0.8125rem;
    color: var(--color-text-secondary);
}

/* ---- Data Charts ---- */
.wetland-data {
    background: var(--color-card);
    padding: var(--space-4xl) 0;
}

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

.wetland-data .data-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);
}

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

.wetland-data .data-card h3 {
    font-family: var(--font-heading);
    font-size: 1.0625rem;
    margin-bottom: var(--space-md);
    color: var(--color-text);
    display: flex;
    align-items: center;
    gap: var(--space-sm);
}

.wetland-data .chart-container {
    width: 100%;
    height: 280px;
    position: relative;
}

.wetland-data .chart-container canvas {
    width: 100% !important;
    height: 100% !important;
    display: block;
}

.wetland-data .chart-container canvas {
    width: 100%;
    height: 100%;
}

.wetland-data .chart-source {
    font-size: 0.75rem;
    color: var(--color-text-muted);
    margin-top: var(--space-sm);
    text-align: right;
}

/* ---- Ramsar Section ---- */
.ramsar-section {
    background: var(--color-bg);
    padding: var(--space-4xl) 0;
}

.ramsar-grid {
    display: grid;
    grid-template-columns: 1fr 1.1fr;
    gap: var(--space-3xl);
    align-items: start;
}

.ramsar-badge {
    display: inline-flex;
    align-items: center;
    gap: var(--space-sm);
    background: var(--color-sky);
    color: var(--color-secondary-dark);
    padding: var(--space-xs) var(--space-md);
    border-radius: var(--radius-full);
    font-size: 0.875rem;
    font-weight: 500;
    margin-bottom: var(--space-md);
}

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

.ramsar-text p {
    color: var(--color-text-secondary);
    line-height: 1.8;
    margin-bottom: var(--space-md);
}

.ramsar-timeline {
    margin-top: var(--space-xl);
    padding-left: var(--space-md);
    border-left: 2px solid var(--color-border);
}

.rt-item {
    display: flex;
    gap: var(--space-lg);
    margin-bottom: var(--space-lg);
    position: relative;
}

.rt-item::before {
    content: '';
    position: absolute;
    left: calc(-1 * var(--space-md) - 5px);
    top: 6px;
    width: 10px;
    height: 10px;
    background: var(--color-primary);
    border-radius: 50%;
    border: 2px solid var(--color-card);
}

.rt-year {
    font-family: var(--font-heading);
    font-size: 1rem;
    font-weight: 700;
    color: var(--color-primary);
    min-width: 48px;
    flex-shrink: 0;
}

.rt-event {
    color: var(--color-text-secondary);
    font-size: 0.9375rem;
    line-height: 1.6;
}

.ramsar-sites h3 {
    font-family: var(--font-heading);
    font-size: 1.25rem;
    margin-bottom: var(--space-lg);
    color: var(--color-text);
}

.site-list {
    display: flex;
    flex-direction: column;
    gap: var(--space-md);
}

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

.site-item:hover {
    box-shadow: var(--shadow-sm);
    border-color: var(--color-primary-light);
}

.site-flag {
    font-size: 1.5rem;
    flex-shrink: 0;
    width: 40px;
    text-align: center;
}

.site-info { flex: 1; }

.site-name {
    font-family: var(--font-heading);
    font-weight: 600;
    color: var(--color-text);
    margin-bottom: 2px;
}

.site-detail {
    font-size: 0.75rem;
    color: var(--color-text-muted);
    margin-bottom: var(--space-xs);
}

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

/* ---- China Wetlands ---- */
.china-wetlands {
    background: var(--color-card);
    padding: var(--space-4xl) 0;
}

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

.china-stat-row {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: var(--space-md);
    margin-bottom: var(--space-xl);
}

.china-stat {
    background: linear-gradient(135deg, #E8F5E9, #C8E6C9);
    border-radius: var(--radius-lg);
    padding: var(--space-md);
    text-align: center;
}

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

.china-stat-label {
    font-size: 0.8125rem;
    color: var(--color-text-secondary);
    margin-top: 4px;
}

.china-overview p {
    color: var(--color-text-secondary);
    line-height: 1.8;
    margin-bottom: var(--space-md);
}

.china-types h3 {
    font-family: var(--font-heading);
    font-size: 1.25rem;
    margin-bottom: var(--space-lg);
    color: var(--color-text);
}

.china-type-list {
    display: flex;
    flex-direction: column;
    gap: var(--space-lg);
}

.china-type-item {
    padding: var(--space-md);
    background: var(--color-bg);
    border-radius: var(--radius-lg);
    border: 1px solid var(--color-border-light);
}

.china-type-bar {
    height: 8px;
    background: var(--color-border-light);
    border-radius: var(--radius-full);
    margin-bottom: var(--space-sm);
    overflow: hidden;
}

.china-type-fill {
    height: 100%;
    background: linear-gradient(90deg, var(--color-primary), var(--color-primary-light));
    border-radius: var(--radius-full);
    transition: width 1.5s ease;
}

.china-type-info {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: var(--space-xs);
}

.china-type-name {
    font-weight: 600;
    color: var(--color-text);
    font-size: 0.9375rem;
}

.china-type-area {
    font-size: 0.8125rem;
    color: var(--color-primary);
    font-weight: 500;
}

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

/* ---- Wetland Crisis ---- */
.wetland-crisis {
    background: var(--color-bg);
    padding: var(--space-4xl) 0;
}

.crisis-header {
    text-align: center;
    margin-bottom: var(--space-3xl);
}

.crisis-header h2 {
    font-family: var(--font-heading);
    color: #c62828;
    font-size: clamp(1.5rem, 3vw, 2rem);
}

.crisis-grid {
    display: grid;
    grid-template-columns: 1.1fr 1fr;
    gap: var(--space-3xl);
}

.crisis-threats h3,
.crisis-impact h3 {
    font-family: var(--font-heading);
    font-size: 1.25rem;
    margin-bottom: var(--space-xl);
    color: var(--color-text);
}

.threat-list {
    display: flex;
    flex-direction: column;
    gap: var(--space-xl);
}

.threat-item {
    display: flex;
    gap: var(--space-lg);
}

.threat-num {
    font-family: var(--font-heading);
    font-size: 2rem;
    font-weight: 900;
    color: var(--color-primary);
    opacity: 0.3;
    line-height: 1;
    flex-shrink: 0;
    min-width: 48px;
}

.threat-content h4 {
    font-family: var(--font-heading);
    font-size: 1.0625rem;
    margin-bottom: var(--space-sm);
    color: var(--color-text);
}

.threat-content p {
    color: var(--color-text-secondary);
    font-size: 0.9375rem;
    line-height: 1.7;
    margin-bottom: 0;
}

.impact-cards {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--space-md);
}

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

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

.impact-icon {
    font-size: 2rem;
    margin-bottom: var(--space-sm);
}

.impact-card h4 {
    font-family: var(--font-heading);
    font-size: 1rem;
    margin-bottom: var(--space-sm);
    color: var(--color-text);
}

.impact-card p {
    font-size: 0.8125rem;
    color: var(--color-text-secondary);
    line-height: 1.6;
    margin-bottom: 0;
}

/* ---- Conservation ---- */
.wetland-conservation {
    background: var(--color-card);
    padding: var(--space-4xl) 0;
}

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

.conservation-international h3,
.conservation-china h3 {
    font-family: var(--font-heading);
    font-size: 1.25rem;
    margin-bottom: var(--space-xl);
    color: var(--color-text);
    padding-bottom: var(--space-md);
    border-bottom: 2px solid var(--color-border-light);
}

.conservation-china h3 {
    border-bottom-color: var(--color-primary-light);
}

.action-list {
    display: flex;
    flex-direction: column;
    gap: var(--space-xl);
}

.action-item {
    display: flex;
    gap: var(--space-lg);
}

.action-year {
    font-family: var(--font-heading);
    font-size: 0.875rem;
    font-weight: 700;
    color: white;
    background: linear-gradient(135deg, var(--color-primary), var(--color-primary-dark));
    padding: 4px 12px;
    border-radius: var(--radius-md);
    height: fit-content;
    flex-shrink: 0;
}

.action-content h4 {
    font-family: var(--font-heading);
    font-size: 1rem;
    margin-bottom: var(--space-sm);
    color: var(--color-text);
}

.action-content p {
    color: var(--color-text-secondary);
    font-size: 0.9375rem;
    line-height: 1.7;
    margin-bottom: 0;
}

/* ---- Articles & Tracks ---- */
.wetland-articles {
    background: var(--color-bg);
    padding: var(--space-4xl) 0;
}

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

.wetland-tracks {
    background: var(--color-card);
    padding: var(--space-4xl) 0;
}

/* ---- Responsive ---- */
@media (min-width: 1024px) and (max-width: 1439px) {
    .types-grid { grid-template-columns: repeat(2, 1fr); }
    .functions-grid { grid-template-columns: repeat(2, 1fr); }
    .wetland-data .data-grid { grid-template-columns: repeat(2, 1fr); }
    .ramsar-grid { grid-template-columns: 1fr 1fr; }
    .china-grid { grid-template-columns: 1fr 1fr; }
    .crisis-grid { grid-template-columns: 1fr 1fr; }
    .conservation-grid { grid-template-columns: 1fr 1fr; }
    .wetland-articles .content-grid { grid-template-columns: repeat(2, 1fr); }
    .definition-grid { grid-template-columns: 1fr 1fr; }
    .distribution-grid { grid-template-columns: 1fr 1fr; }
}

@media (min-width: 768px) and (max-width: 1023px) {
    .types-grid { grid-template-columns: 1fr; gap: var(--space-lg); }
    .functions-grid { grid-template-columns: 1fr; gap: var(--space-lg); }
    .wetland-data .data-grid { grid-template-columns: 1fr; }
    .ramsar-grid { grid-template-columns: 1fr; gap: var(--space-2xl); }
    .china-grid { grid-template-columns: 1fr; gap: var(--space-2xl); }
    .crisis-grid { grid-template-columns: 1fr; gap: var(--space-2xl); }
    .conservation-grid { grid-template-columns: 1fr; gap: var(--space-2xl); }
    .wetland-articles .content-grid { grid-template-columns: repeat(2, 1fr); gap: var(--space-lg); }
    .definition-grid { grid-template-columns: 1fr; gap: var(--space-2xl); }
    .distribution-grid { grid-template-columns: 1fr; gap: var(--space-2xl); }
    .impact-cards { grid-template-columns: 1fr 1fr; }
    .wetland-hero-stats { gap: var(--space-xl); }
}

@media (max-width: 767px) {
    .types-grid { grid-template-columns: 1fr; gap: var(--space-lg); }
    .type-card { flex-direction: column; gap: var(--space-md); }
    .functions-grid { grid-template-columns: 1fr; gap: var(--space-lg); }
    .wetland-data .data-grid { grid-template-columns: 1fr; }
    .ramsar-grid { grid-template-columns: 1fr; gap: var(--space-2xl); }
    .china-grid { grid-template-columns: 1fr; gap: var(--space-2xl); }
    .crisis-grid { grid-template-columns: 1fr; gap: var(--space-2xl); }
    .conservation-grid { grid-template-columns: 1fr; gap: var(--space-2xl); }
    .wetland-articles .content-grid { grid-template-columns: 1fr; gap: var(--space-lg); }
    .definition-grid { grid-template-columns: 1fr; gap: var(--space-2xl); }
    .distribution-grid { grid-template-columns: 1fr; gap: var(--space-2xl); }
    .impact-cards { grid-template-columns: 1fr; }
    .wetland-hero-stats { gap: var(--space-xl); }
    .wetland-hero-stat .num { font-size: 1.75rem; }
    .china-stat-row { grid-template-columns: 1fr 1fr; }
    .wetland-data .chart-container { height: 220px; }
    .wetland-data .data-card[style*="grid-column"] .chart-container { height: 260px; }
}