/* ============================================
   探空气球系统子页面样式表
   迪卓依思 · 地理志 (djoyce.com)
   对应文件: meteorology/upper-air/balloon-system.html
   ============================================ */

/* --------------------------------------------
   1. Hero 首屏区域覆盖
   -------------------------------------------- */
.balloon-hero {
    background: linear-gradient(160deg, #0a1a2e 0%, #1a3a5c 40%, #0d2137 100%);
}

.balloon-hero .column-hero-content h1 .highlight {
    background: linear-gradient(135deg, #FF9800, #FFB74D);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

/* --------------------------------------------
   2. 气球材质与规格
   -------------------------------------------- */
.balloon-materials {
    background: var(--color-bg);
}

.balloon-specs-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--space-xl);
    margin-bottom: var(--space-3xl);
}

.spec-card {
    background: var(--color-card);
    border: 1px solid var(--color-border-light);
    border-radius: var(--radius-xl);
    padding: var(--space-2xl);
    transition: var(--transition-base);
}

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

.spec-card .spec-icon {
    width: 56px;
    height: 56px;
    border-radius: var(--radius-lg);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.75rem;
    margin-bottom: var(--space-md);
    background: linear-gradient(135deg, #FFF3E0, #FFE0B2);
}

.spec-card:nth-child(2) .spec-icon {
    background: linear-gradient(135deg, #E3F2FD, #BBDEFB);
}

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

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

.spec-table-wrap {
    overflow-x: auto;
    margin-bottom: var(--space-lg);
    border-radius: var(--radius-md);
    border: 1px solid var(--color-border-light);
}

.spec-table {
    width: 100%;
    border-collapse: collapse;
    font-size: 0.875rem;
}

.spec-table thead {
    background: var(--color-sky);
}

.spec-table th {
    padding: var(--space-sm) var(--space-md);
    text-align: left;
    font-weight: 600;
    color: var(--color-text);
    font-size: 0.8125rem;
    text-transform: uppercase;
    letter-spacing: 0.03em;
    white-space: nowrap;
}

.spec-table td {
    padding: var(--space-sm) var(--space-md);
    border-top: 1px solid var(--color-border-light);
    color: var(--color-text-secondary);
    white-space: nowrap;
}

.spec-table tbody tr:hover {
    background: var(--color-sky);
}

.spec-note {
    background: linear-gradient(135deg, #FFF8E1, #FFF3E0);
    border-left: 3px solid var(--color-accent);
    padding: var(--space-md) var(--space-lg);
    border-radius: 0 var(--radius-md) var(--radius-md) 0;
    font-size: 0.875rem;
    color: var(--color-text-secondary);
    line-height: 1.7;
}

.spec-note strong {
    color: var(--color-accent);
}

/* --------------------------------------------
   3. Canvas 通用容器
   -------------------------------------------- */
.canvas-section {
    margin-top: var(--space-3xl);
}

.canvas-title {
    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);
}

.canvas-title svg {
    flex-shrink: 0;
}

.canvas-caption {
    font-size: 0.8125rem;
    color: var(--color-text-muted);
    margin-top: var(--space-sm);
    line-height: 1.6;
}

.balloon-expand-container,
.ascent-profile-container,
.trajectory-container,
.launch-timeline-container,
.global-map-container,
.china-map-container,
.china-bar-container {
    width: 100%;
    background: var(--color-card);
    border: 1px solid var(--color-border-light);
    border-radius: var(--radius-lg);
    overflow: hidden;
    position: relative;
}

.balloon-expand-container {
    aspect-ratio: 16 / 8;
    background: linear-gradient(180deg, #E3F2FD 0%, #E8F5E9 50%, #FFF3E0 100%);
}

.ascent-profile-container {
    aspect-ratio: 16 / 9;
    background: #FAFAFA;
}

.trajectory-container {
    aspect-ratio: 16 / 9;
    background: linear-gradient(180deg, #E3F2FD 0%, #E8F5E9 100%);
}

.launch-timeline-container {
    aspect-ratio: 16 / 5;
    background: #FAFAFA;
}

.global-map-container {
    aspect-ratio: 16 / 8;
    background: linear-gradient(180deg, #E8F5E9 0%, #E3F2FD 100%);
}

.china-map-container {
    aspect-ratio: 16 / 10;
    background: linear-gradient(180deg, #E3F2FD 0%, #E8F5E9 100%);
}

.china-bar-container {
    aspect-ratio: 16 / 8;
    background: #FAFAFA;
}

.balloon-expand-container canvas,
.ascent-profile-container canvas,
.trajectory-container canvas,
.launch-timeline-container canvas,
.china-map-container canvas,
.china-bar-container canvas {
    width: 100%;
    height: 100%;
    display: block;
}

/* --------------------------------------------
   4. 充气气体区域
   -------------------------------------------- */
.gas-section {
    background: var(--color-card);
}

.gas-content-grid {
    display: grid;
    grid-template-columns: 1.2fr 0.8fr;
    gap: var(--space-3xl);
    align-items: start;
}

.gas-theory h3,
.gas-practice h3 {
    font-family: var(--font-heading);
    font-size: 1.25rem;
    margin-bottom: var(--space-lg);
    color: var(--color-text);
}

.gas-theory > p {
    color: var(--color-text-secondary);
    font-size: 0.9375rem;
    line-height: 1.8;
    margin-bottom: var(--space-md);
}

.formula-box {
    background: linear-gradient(135deg, #f8f9fa, #e9ecef);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    padding: var(--space-lg);
    margin: var(--space-lg) 0;
}

.formula-row {
    display: flex;
    flex-direction: column;
    gap: var(--space-xs);
    margin-bottom: var(--space-md);
}

.formula-row:last-child {
    margin-bottom: 0;
}

.formula {
    font-family: var(--font-mono);
    font-size: 1rem;
    color: var(--color-secondary-dark);
    font-weight: 500;
    letter-spacing: 0.02em;
}

.formula-desc {
    font-size: 0.8125rem;
    color: var(--color-text-muted);
}

.gas-compare-table-wrap {
    overflow-x: auto;
    margin-top: var(--space-xl);
    border-radius: var(--radius-md);
    border: 1px solid var(--color-border-light);
}

.gas-compare-table {
    width: 100%;
    border-collapse: collapse;
    font-size: 0.8125rem;
}

.gas-compare-table thead {
    background: var(--color-sky);
}

.gas-compare-table th {
    padding: var(--space-sm) var(--space-md);
    text-align: left;
    font-weight: 600;
    color: var(--color-text);
    font-size: 0.75rem;
    text-transform: uppercase;
    letter-spacing: 0.03em;
    white-space: nowrap;
}

.gas-compare-table td {
    padding: var(--space-sm) var(--space-md);
    border-top: 1px solid var(--color-border-light);
    color: var(--color-text-secondary);
}

.gas-compare-table tbody tr:hover {
    background: var(--color-sky);
}

.gas-compare-table td:first-child {
    font-weight: 600;
    color: var(--color-text);
}

/* 实践卡片 */
.practice-card {
    background: var(--color-bg);
    border: 1px solid var(--color-border-light);
    border-radius: var(--radius-lg);
    padding: var(--space-lg);
    margin-bottom: var(--space-lg);
    transition: var(--transition-base);
}

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

.practice-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: var(--space-sm);
    flex-wrap: wrap;
    gap: var(--space-xs);
}

.practice-tag {
    display: inline-block;
    padding: 4px 12px;
    border-radius: var(--radius-full);
    font-size: 0.75rem;
    font-weight: 600;
    letter-spacing: 0.03em;
}

.practice-tag.hydrogen {
    background: #FFEBEE;
    color: #C62828;
}

.practice-tag.helium {
    background: #E3F2FD;
    color: #1565C0;
}

.practice-tag.hybrid {
    background: #F3E5F5;
    color: #6A1B9A;
}

.practice-station {
    font-size: 0.8125rem;
    color: var(--color-text-muted);
}

.practice-card > p {
    font-size: 0.875rem;
    color: var(--color-text-secondary);
    line-height: 1.7;
    margin-bottom: var(--space-md);
}

.practice-detail {
    display: flex;
    flex-direction: column;
    gap: var(--space-xs);
}

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

.practice-detail strong {
    color: var(--color-text-secondary);
}

/* --------------------------------------------
   5. 上升动力学
   -------------------------------------------- */
.physics-section {
    background: var(--color-bg);
}

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

.physics-text h3 {
    font-family: var(--font-heading);
    font-size: 1.25rem;
    margin-bottom: var(--space-md);
    margin-top: var(--space-xl);
    color: var(--color-text);
}

.physics-text h3:first-child {
    margin-top: 0;
}

.physics-text > p {
    color: var(--color-text-secondary);
    font-size: 0.9375rem;
    line-height: 1.8;
    margin-bottom: var(--space-md);
}

.physics-highlight {
    background: linear-gradient(135deg, #E8F5E9, #C8E6C9);
    border-left: 3px solid var(--color-primary);
    padding: var(--space-md) var(--space-lg);
    border-radius: 0 var(--radius-md) var(--radius-md) 0;
    font-size: 0.875rem;
    color: var(--color-text-secondary);
    line-height: 1.7;
    margin: var(--space-lg) 0;
}

.physics-highlight strong {
    color: var(--color-primary-dark);
}

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

.physics-visuals .canvas-section {
    margin-top: 0;
}

/* --------------------------------------------
   6. 施放流程
   -------------------------------------------- */
.launch-section {
    background: var(--color-card);
}

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

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

.launch-step:hover {
    box-shadow: var(--shadow-md);
    transform: translateY(-4px);
    border-color: var(--color-secondary-light);
}

.launch-number {
    font-family: var(--font-heading);
    font-size: 2.5rem;
    font-weight: 900;
    color: var(--color-secondary);
    opacity: 0.2;
    line-height: 1;
    margin-bottom: var(--space-sm);
}

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

.launch-content > p {
    font-size: 0.875rem;
    color: var(--color-text-secondary);
    line-height: 1.7;
    margin-bottom: var(--space-md);
}

.launch-meta {
    display: flex;
    flex-direction: column;
    gap: 4px;
}

.launch-meta span {
    font-size: 0.75rem;
    color: var(--color-text-muted);
    font-weight: 500;
}

.launch-canvas-section {
    margin-top: var(--space-3xl);
}

/* --------------------------------------------
   7. 性能参数
   -------------------------------------------- */
.performance-section {
    background: var(--color-bg);
}

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

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

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

.perf-header {
    background: linear-gradient(135deg, var(--color-primary), var(--color-secondary));
    padding: var(--space-lg);
    display: flex;
    align-items: center;
    gap: var(--space-sm);
}

.perf-icon {
    font-size: 1.5rem;
}

.perf-header h3 {
    font-family: var(--font-heading);
    font-size: 1rem;
    color: white;
    margin: 0;
}

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

.perf-metric {
    display: flex;
    align-items: baseline;
    gap: var(--space-xs);
    margin-bottom: var(--space-sm);
    padding-bottom: var(--space-sm);
    border-bottom: 1px solid var(--color-border-light);
}

.perf-metric:last-of-type {
    border-bottom: none;
    margin-bottom: var(--space-md);
}

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

.perf-unit {
    font-size: 0.875rem;
    color: var(--color-text-muted);
    font-weight: 500;
}

.perf-label {
    font-size: 0.75rem;
    color: var(--color-text-muted);
    margin-left: auto;
    text-align: right;
}

.perf-desc {
    font-size: 0.8125rem;
    color: var(--color-text-secondary);
    line-height: 1.6;
    margin: 0;
}

/* --------------------------------------------
   8. 全球网络
   -------------------------------------------- */
.network-section {
    background: var(--color-card);
}

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

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

.network-text > p {
    color: var(--color-text-secondary);
    font-size: 0.9375rem;
    line-height: 1.8;
    margin-bottom: var(--space-md);
}

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

.net-stat {
    background: linear-gradient(135deg, #E8F5E9, #E3F2FD);
    border-radius: var(--radius-lg);
    padding: var(--space-lg);
    text-align: center;
}

.net-num {
    font-family: var(--font-heading);
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--color-primary);
    display: block;
    line-height: 1;
    margin-bottom: var(--space-xs);
}

.net-label {
    font-size: 0.75rem;
    color: var(--color-text-secondary);
    font-weight: 500;
}

/* --------------------------------------------
   9. 中国布局
   -------------------------------------------- */
.china-section {
    background: var(--color-bg);
}

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

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

.china-text > p {
    color: var(--color-text-secondary);
    font-size: 0.9375rem;
    line-height: 1.8;
    margin-bottom: var(--space-md);
}

.china-regions {
    margin-top: var(--space-xl);
}

.china-regions h4,
.china-upgrade h4 {
    font-family: var(--font-heading);
    font-size: 1.0625rem;
    margin-bottom: var(--space-md);
    color: var(--color-text);
}

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

.region-item {
    background: var(--color-card);
    border: 1px solid var(--color-border-light);
    border-radius: var(--radius-lg);
    padding: var(--space-md) var(--space-lg);
    display: flex;
    flex-direction: column;
    gap: 4px;
    transition: var(--transition-base);
}

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

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

.region-stations {
    font-size: 0.8125rem;
    color: var(--color-text-secondary);
}

.region-note {
    font-size: 0.75rem;
    color: var(--color-text-muted);
    font-style: italic;
}

.china-upgrade {
    margin-top: var(--space-xl);
    background: linear-gradient(135deg, #E3F2FD, #E8F5E9);
    border-left: 3px solid var(--color-secondary);
    padding: var(--space-lg);
    border-radius: 0 var(--radius-md) var(--radius-md) 0;
}

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

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

.china-visuals .canvas-section {
    margin-top: 0;
}

/* --------------------------------------------
   10. 响应式适配
   -------------------------------------------- */
@media (max-width: 1023px) {
    .balloon-specs-grid {
        grid-template-columns: 1fr;
    }

    .gas-content-grid {
        grid-template-columns: 1fr;
    }

    .physics-grid {
        grid-template-columns: 1fr;
    }

    .launch-flow {
        grid-template-columns: repeat(2, 1fr);
    }

    .perf-grid {
        grid-template-columns: repeat(2, 1fr);
    }

    .network-content {
        grid-template-columns: 1fr;
    }

    .china-content {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 767px) {
    .launch-flow {
        grid-template-columns: 1fr;
    }

    .perf-grid {
        grid-template-columns: 1fr;
    }

    .network-stats {
        grid-template-columns: 1fr 1fr;
    }

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

    .balloon-expand-container,
    .ascent-profile-container,
    .trajectory-container,
    .launch-timeline-container,
    .global-map-container,
    .china-map-container,
    .china-bar-container {
        aspect-ratio: 4 / 3;
    }

    .formula {
        font-size: 0.875rem;
    }

    .perf-value {
        font-size: 1.5rem;
    }
}

@media (max-width: 479px) {
    .network-stats {
        grid-template-columns: 1fr;
    }

    .launch-step {
        padding: var(--space-lg);
    }

    .practice-header {
        flex-direction: column;
        align-items: flex-start;
    }
}