/* Naval AI 2026 深度解读 - 共享样式 */
:root {
    --color-success: #059669;
    --color-success-light: #10B981;
    --color-danger: #E11D48;
    --color-danger-light: #F43F5E;
    --color-warning: #D97706;
    --color-warning-light: #F59E0B;
    --color-info: #2563EB;
    --color-info-light: #3B82F6;
    --color-purple: #7C3AED;
    --color-purple-light: #8B5CF6;
    --color-text-primary: #1C1917;
    --color-text-secondary: #57534E;
    --color-text-muted: #78716C;
    --color-border: #E7E5E4;
    --color-border-light: #F5F5F4;
    --color-bg: #F8FAFB;
    --color-bg-card: #FFFFFF;
    --color-bg-table-header: #FAFAF9;
    --gradient-success: linear-gradient(135deg, #059669 0%, #10B981 100%);
    --gradient-hero: linear-gradient(135deg, #059669 0%, #2563EB 50%, #7C3AED 100%);
    --gradient-badge: linear-gradient(135deg, #ECFDF5 0%, #EFF6FF 100%);
    --gradient-mesh: 
        radial-gradient(at 20% 20%, rgba(5,150,105,0.08) 0%, transparent 50%),
        radial-gradient(at 80% 80%, rgba(37,99,235,0.06) 0%, transparent 50%),
        radial-gradient(at 50% 50%, rgba(124,58,237,0.04) 0%, transparent 50%);
    --shadow-card: 0 2px 8px rgba(0,0,0,0.06), 0 1px 2px rgba(0,0,0,0.04);
    --shadow-hover: 0 6px 16px rgba(5,150,105,0.15), 0 2px 6px rgba(5,150,105,0.1);
    --shadow-glow-purple: 0 4px 14px rgba(124,58,237,0.15);
    --spacing-sm: 8px;
    --spacing-md: 16px;
    --spacing-lg: 24px;
    --spacing-xl: 32px;
    --spacing-2xl: 40px;
    --radius-sm: 8px;
    --radius-md: 12px;
    --radius-lg: 16px;
    --radius-full: 9999px;
    --font-family: -apple-system, "SF Pro Display", "system-ui", "Segoe UI", "Noto Sans SC", Helvetica, Arial, sans-serif;
    --transition-fast: 150ms cubic-bezier(0.4, 0, 0.2, 1);
}

* { margin: 0; padding: 0; box-sizing: border-box; }

body {
    font-family: var(--font-family);
    font-size: 15px;
    line-height: 1.65;
    color: var(--color-text-secondary);
    background: var(--color-bg);
    background-image: var(--gradient-mesh);
    background-attachment: fixed;
    -webkit-font-smoothing: antialiased;
}

::selection { background: rgba(124, 58, 237, 0.2); }

.container {
    max-width: 980px;
    margin: 0 auto;
    padding: var(--spacing-lg) var(--spacing-md) 48px;
}

/* Header */
.header {
    text-align: center;
    margin-bottom: var(--spacing-lg);
    position: relative;
    padding: var(--spacing-2xl) 0;
}
.header::after {
    content: '';
    position: absolute;
    top: 0; left: 0; right: 0;
    height: 3px;
    background: var(--gradient-hero);
}
.badge {
    display: inline-block;
    background: var(--gradient-badge);
    color: var(--color-purple);
    padding: 4px 14px;
    border-radius: var(--radius-full);
    font-size: 11px;
    font-weight: 500;
    margin-bottom: var(--spacing-md);
    border: 1px solid rgba(124, 58, 237, 0.12);
}
.main-title {
    font-size: 32px;
    font-weight: 800;
    margin-bottom: var(--spacing-sm);
    letter-spacing: -0.02em;
    background: var(--gradient-hero);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}
.subtitle { 
    color: var(--color-text-secondary); 
    max-width: 700px;
    margin: 0 auto;
    font-size: 15px;
}

/* Stats Grid */
.stats-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-lg);
}
@media (max-width: 768px) {
    .stats-grid { grid-template-columns: repeat(2, 1fr); }
}
.stat-card {
    background: var(--color-bg-card);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    padding: 20px;
    text-align: center;
    transition: all var(--transition-fast);
}
.stat-card:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-hover);
    border-color: var(--color-success);
}
.stat-value { font-size: 28px; font-weight: 700; }
.stat-value.success { color: var(--color-success); }
.stat-value.purple { color: var(--color-purple); }
.stat-value.info { color: var(--color-info); }
.stat-value.warning { color: var(--color-warning); }
.stat-label {
    font-size: 11px;
    color: var(--color-text-muted);
    text-transform: uppercase;
    letter-spacing: 0.05em;
    margin-top: 4px;
}

/* Tab Navigation */
.tab-nav {
    display: flex;
    flex-wrap: wrap;
    gap: 4px;
    background: rgba(255,255,255,0.95);
    backdrop-filter: blur(20px) saturate(1.8);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    padding: 6px;
    margin-bottom: var(--spacing-lg);
    position: sticky;
    top: 12px;
    z-index: 100;
    box-shadow: var(--shadow-card);
}
.tab-btn {
    flex: 1 1 auto;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 6px;
    padding: 10px 12px;
    background: transparent;
    border: none;
    border-radius: var(--radius-md);
    cursor: pointer;
    font-family: inherit;
    font-size: 13px;
    font-weight: 500;
    color: var(--color-text-muted);
    transition: all var(--transition-fast);
    white-space: nowrap;
    min-width: 80px;
}
.tab-btn:hover {
    background: var(--color-bg-table-header);
    color: var(--color-text-secondary);
}
.tab-btn.active {
    background: var(--gradient-success);
    color: #fff;
    box-shadow: 0 2px 8px rgba(5, 150, 105, 0.25);
}
@media (max-width: 768px) {
    .tab-btn {
        font-size: 12px;
        padding: 8px 10px;
        min-width: auto;
    }
    .tab-btn .tab-text { display: none; }
}

/* Tab Content */
.tab-content {
    display: none;
    animation: fadeIn 0.3s ease;
}
.tab-content.active {
    display: block;
}
@keyframes fadeIn {
    from { opacity: 0; transform: translateY(10px); }
    to { opacity: 1; transform: translateY(0); }
}

/* Section Card */
.section-card {
    background: var(--color-bg-card);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-card);
    padding: var(--spacing-lg);
    margin-bottom: var(--spacing-lg);
}
.section-header {
    display: flex;
    align-items: center;
    gap: 12px;
    margin-bottom: var(--spacing-md);
}
.section-header h2 {
    font-size: 18px;
    font-weight: 600;
    color: var(--color-text-primary);
}
.section-number {
    background: var(--gradient-success);
    color: white;
    width: 32px;
    height: 32px;
    border-radius: var(--radius-md);
    font-size: 14px;
    font-weight: 600;
    display: flex;
    align-items: center;
    justify-content: center;
}
.section-number.purple { background: linear-gradient(135deg, #7C3AED 0%, #8B5CF6 100%); }
.section-number.info { background: linear-gradient(135deg, #2563EB 0%, #3B82F6 100%); }
.section-number.warning { background: linear-gradient(135deg, #D97706 0%, #F59E0B 100%); }

/* Quote Block */
.quote-block {
    background: linear-gradient(135deg, rgba(124,58,237,0.08) 0%, rgba(124,58,237,0.03) 100%);
    border-left: 4px solid var(--color-purple);
    border-radius: 0 var(--radius-md) var(--radius-md) 0;
    padding: var(--spacing-lg);
    margin: var(--spacing-lg) 0;
}
.quote-block .quote {
    font-size: 17px;
    font-weight: 500;
    color: var(--color-text-primary);
    font-style: italic;
    line-height: 1.6;
    margin-bottom: 12px;
}
.quote-block .author {
    font-size: 13px;
    color: var(--color-purple);
    font-weight: 500;
}

/* Chapter Image */
.chapter-image {
    width: 100%;
    border-radius: var(--radius-lg);
    margin-bottom: var(--spacing-lg);
    box-shadow: var(--shadow-card);
    transition: all var(--transition-fast);
}
.chapter-image:hover {
    box-shadow: var(--shadow-hover);
}

/* Deep Analysis */
.deep-analysis {
    background: linear-gradient(135deg, rgba(5,150,105,0.06) 0%, rgba(5,150,105,0.02) 100%);
    border: 1px solid rgba(5,150,105,0.2);
    border-radius: var(--radius-lg);
    padding: var(--spacing-lg);
    margin: var(--spacing-lg) 0;
}
.deep-analysis h3 {
    font-size: 16px;
    font-weight: 600;
    color: var(--color-success);
    margin-bottom: var(--spacing-md);
    display: flex;
    align-items: center;
    gap: 8px;
}
.deep-analysis p {
    font-size: 14px;
    line-height: 1.7;
    margin-bottom: var(--spacing-sm);
}

/* Comparison Grid */
.comparison-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-md);
    margin: var(--spacing-md) 0;
}
@media (max-width: 768px) {
    .comparison-grid { grid-template-columns: 1fr; }
}
.comparison-card {
    background: var(--color-bg-card);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    padding: var(--spacing-md);
}
.comparison-card.highlight {
    border-color: var(--color-success);
    background: linear-gradient(135deg, rgba(5,150,105,0.04) 0%, transparent 100%);
}
.comparison-card .card-title {
    font-size: 14px;
    font-weight: 600;
    color: var(--color-text-primary);
    margin-bottom: var(--spacing-sm);
    display: flex;
    align-items: center;
    gap: 8px;
}
.comparison-card ul {
    font-size: 13px;
    margin-left: var(--spacing-md);
}
.comparison-card li {
    margin-bottom: 4px;
}

/* Evidence Card */
.evidence-card {
    background: var(--color-bg-table-header);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    padding: var(--spacing-md);
    margin-top: var(--spacing-md);
}
.evidence-card .label {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    font-size: 11px;
    font-weight: 600;
    color: var(--color-info);
    text-transform: uppercase;
    margin-bottom: 8px;
}
.evidence-card ul {
    margin-left: var(--spacing-md);
    font-size: 14px;
}
.evidence-card li {
    margin-bottom: 6px;
}

/* Tags */
.tag {
    display: inline-block;
    padding: 4px 10px;
    border-radius: var(--radius-full);
    font-size: 11px;
    font-weight: 500;
}
.tag.success { background: #ECFDF5; color: var(--color-success); }
.tag.purple { background: #F5F3FF; color: var(--color-purple); }
.tag.info { background: #EFF6FF; color: var(--color-info); }
.tag.warning { background: #FFFBEB; color: var(--color-warning); }
.tag.danger { background: #FEF2F2; color: var(--color-danger); }

/* Table */
.data-table {
    width: 100%;
    border-collapse: collapse;
    margin: var(--spacing-md) 0;
}
.data-table th, .data-table td {
    padding: 12px;
    text-align: left;
    border-bottom: 1px solid var(--color-border);
    font-size: 14px;
}
.data-table th {
    background: var(--color-bg-table-header);
    font-weight: 600;
    color: var(--color-text-primary);
}
.data-table tr:hover {
    background: rgba(5,150,105,0.04);
}

/* Key Insight */
.key-insight {
    background: linear-gradient(135deg, rgba(5,150,105,0.12) 0%, rgba(37,99,235,0.08) 50%, rgba(124,58,237,0.06) 100%);
    border: 2px solid var(--color-success);
    border-radius: var(--radius-lg);
    padding: var(--spacing-lg);
    margin: var(--spacing-lg) 0;
    text-align: center;
}
.key-insight .emoji {
    font-size: 48px;
    margin-bottom: var(--spacing-sm);
}
.key-insight .title {
    font-size: 20px;
    font-weight: 700;
    color: var(--color-text-primary);
    margin-bottom: var(--spacing-sm);
}
.key-insight .desc {
    font-size: 15px;
    color: var(--color-text-secondary);
    max-width: 600px;
    margin: 0 auto;
}

/* Metaphor Diagram */
.metaphor-diagram {
    background: linear-gradient(135deg, #F8FAFB 0%, #F0FDF4 100%);
    border: 2px solid var(--color-success);
    border-radius: var(--radius-lg);
    padding: var(--spacing-lg);
    margin: var(--spacing-lg) 0;
    text-align: center;
}
.metaphor-flow {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 20px;
    flex-wrap: wrap;
}
.metaphor-item {
    background: white;
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    padding: 16px 24px;
    min-width: 160px;
}
.metaphor-item .icon {
    font-size: 36px;
    margin-bottom: 8px;
}
.metaphor-item .label {
    font-size: 12px;
    color: var(--color-text-muted);
    margin-bottom: 4px;
}
.metaphor-item .value {
    font-size: 15px;
    font-weight: 600;
    color: var(--color-text-primary);
}
.metaphor-arrow {
    color: var(--color-success);
    font-size: 28px;
    font-weight: bold;
}

/* Learn More Footer */
.learn-more-footer {
    margin-top: 24px;
    background: linear-gradient(135deg, #F8FAFB 0%, #EEF2F6 100%);
    border: 1px solid #F5F5F4;
    border-radius: 14px;
    padding: 24px;
    box-shadow: 0 2px 8px rgba(31,35,40,.06), 0 1px 2px rgba(31,35,40,.04);
}
.learn-more-footer h4 {
    font-size: 16px;
    font-weight: 700;
    margin-bottom: 8px;
    display: flex;
    align-items: center;
    gap: 8px;
}
.learn-more-footer p {
    font-size: 14px;
    color: #57534E;
    line-height: 1.7;
    margin: 0 0 12px 0;
}
.learn-more-footer .btn-primary {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 8px 16px;
    background: linear-gradient(135deg, #059669 0%, #10B981 100%);
    color: #fff;
    border-radius: 999px;
    font-size: 13px;
    font-weight: 600;
    text-decoration: none;
}
.learn-more-footer .btn-primary:hover {
    transform: translateY(-1px);
    box-shadow: 0 4px 12px rgba(5,150,105,0.3);
}

/* Golden Grid */
.golden-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: var(--spacing-md);
}
@media (max-width: 768px) {
    .golden-grid { grid-template-columns: 1fr; }
}
.golden-card {
    background: var(--color-bg-card);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    padding: var(--spacing-md);
    transition: all var(--transition-fast);
}
.golden-card:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-hover);
    border-color: var(--color-success);
}
.golden-card .theme {
    font-size: 11px;
    font-weight: 600;
    color: var(--color-purple);
    text-transform: uppercase;
    letter-spacing: 0.05em;
    margin-bottom: 8px;
}
.golden-card .sentence {
    font-size: 14px;
    font-weight: 500;
    color: var(--color-text-primary);
    line-height: 1.5;
}