/* ============================================
   40年的追寻 - iPhone 17e 风格样式表
   极简主义设计 + 深邃黑色背景 + 细腻渐变
   ============================================ */

/* CSS Variables */
:root {
    /* 颜色系统 - 深邃黑色主题 */
    --bg-primary: #000000;
    --bg-secondary: #0a0a0a;
    --bg-tertiary: #111111;
    --bg-card: rgba(255, 255, 255, 0.03);
    
    /* 文字颜色 */
    --text-primary: #ffffff;
    --text-secondary: rgba(255, 255, 255, 0.7);
    --text-tertiary: rgba(255, 255, 255, 0.5);
    
    /* 渐变色彩 */
    --gradient-blue: linear-gradient(135deg, #007AFF 0%, #5856D6 100%);
    --gradient-purple: linear-gradient(135deg, #5856D6 0%, #AF52DE 100%);
    --gradient-pink: linear-gradient(135deg, #FF2D55 0%, #FF9500 100%);
    --gradient-teal: linear-gradient(135deg, #5AC8FA 0%, #34C759 100%);
    --gradient-gold: linear-gradient(135deg, #FFD700 0%, #FF9500 100%);
    
    /* 强调色 */
    --accent-blue: #007AFF;
    --accent-purple: #5856D6;
    --accent-pink: #FF2D55;
    --accent-teal: #5AC8FA;
    --accent-green: #34C759;
    --accent-orange: #FF9500;
    
    /* 证据等级颜色 */
    --evidence-a: #34C759;
    --evidence-b: #5AC8FA;
    --evidence-c: #FF9500;
    --evidence-d: #FF3B30;
    
    /* 字体 */
    --font-primary: 'Noto Sans SC', 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
    
    /* 间距 */
    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 1.5rem;
    --spacing-lg: 2rem;
    --spacing-xl: 3rem;
    --spacing-xxl: 5rem;
    
    /* 圆角 */
    --radius-sm: 8px;
    --radius-md: 12px;
    --radius-lg: 20px;
    --radius-xl: 28px;
    
    /* 过渡 */
    --transition-fast: 0.2s ease;
    --transition-normal: 0.3s ease;
    --transition-slow: 0.5s ease;
    
    /* 阴影 */
    --shadow-card: 0 4px 24px rgba(0, 0, 0, 0.3);
    --shadow-glow: 0 0 40px rgba(0, 122, 255, 0.3);
}

/* Reset & Base */
*, *::before, *::after {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    font-size: 16px;
    scroll-behavior: smooth;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

body {
    font-family: var(--font-primary);
    background-color: var(--bg-primary);
    color: var(--text-primary);
    line-height: 1.6;
    overflow-x: hidden;
}

/* Selection */
::selection {
    background: rgba(0, 122, 255, 0.3);
    color: var(--text-primary);
}

/* Scrollbar */
::-webkit-scrollbar {
    width: 8px;
}

::-webkit-scrollbar-track {
    background: var(--bg-secondary);
}

::-webkit-scrollbar-thumb {
    background: rgba(255, 255, 255, 0.2);
    border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
    background: rgba(255, 255, 255, 0.3);
}

/* ============================================
   导航栏
   ============================================ */
.nav-bar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    padding: 1rem 0;
    transition: var(--transition-normal);
    background: transparent;
}

.nav-bar.scrolled {
    background: rgba(0, 0, 0, 0.8);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
}

.nav-container {
    max-width: 1400px;
    margin: 0 auto;
    padding: 0 var(--spacing-lg);
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.nav-logo {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    text-decoration: none;
    color: var(--text-primary);
}

.logo-icon {
    font-size: 1.5rem;
    background: var(--gradient-blue);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.logo-text {
    font-size: 1.1rem;
    font-weight: 600;
    letter-spacing: -0.02em;
}

.nav-menu {
    display: flex;
    list-style: none;
    gap: var(--spacing-lg);
}

.nav-link {
    color: var(--text-secondary);
    text-decoration: none;
    font-size: 0.9rem;
    font-weight: 500;
    transition: var(--transition-fast);
    position: relative;
}

.nav-link::after {
    content: '';
    position: absolute;
    bottom: -4px;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--gradient-blue);
    transition: var(--transition-fast);
}

.nav-link:hover {
    color: var(--text-primary);
}

.nav-link:hover::after {
    width: 100%;
}

/* 移动端导航 */
.nav-toggle {
    display: none;
    flex-direction: column;
    gap: 5px;
    background: none;
    border: none;
    cursor: pointer;
    padding: 5px;
}

.nav-toggle span {
    display: block;
    width: 24px;
    height: 2px;
    background: var(--text-primary);
    transition: var(--transition-fast);
}

/* ============================================
   Hero Section
   ============================================ */
.hero {
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    position: relative;
    padding: var(--spacing-xxl) var(--spacing-lg);
    overflow: hidden;
}

.hero-background {
    position: absolute;
    inset: 0;
    overflow: hidden;
}

.gradient-orb {
    position: absolute;
    border-radius: 50%;
    filter: blur(80px);
    opacity: 0.5;
    animation: orbFloat 20s ease-in-out infinite;
}

.orb-1 {
    width: 600px;
    height: 600px;
    background: var(--gradient-purple);
    top: -200px;
    right: -100px;
    animation-delay: 0s;
}

.orb-2 {
    width: 500px;
    height: 500px;
    background: var(--gradient-blue);
    bottom: -150px;
    left: -100px;
    animation-delay: -7s;
}

.orb-3 {
    width: 400px;
    height: 400px;
    background: var(--gradient-pink);
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    animation-delay: -14s;
    opacity: 0.3;
}

@keyframes orbFloat {
    0%, 100% {
        transform: translate(0, 0) scale(1);
    }
    25% {
        transform: translate(30px, -30px) scale(1.05);
    }
    50% {
        transform: translate(-20px, 20px) scale(0.95);
    }
    75% {
        transform: translate(-30px, -20px) scale(1.02);
    }
}

.hero-content {
    position: relative;
    z-index: 1;
    text-align: center;
    max-width: 900px;
}

.hero-badge {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.5rem 1rem;
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: 100px;
    margin-bottom: var(--spacing-lg);
}

.badge-dot {
    width: 8px;
    height: 8px;
    background: var(--accent-green);
    border-radius: 50%;
    animation: pulse 2s ease-in-out infinite;
}

@keyframes pulse {
    0%, 100% {
        opacity: 1;
        transform: scale(1);
    }
    50% {
        opacity: 0.5;
        transform: scale(1.2);
    }
}

.badge-text {
    font-size: 0.85rem;
    color: var(--text-secondary);
}

.hero-title {
    margin-bottom: var(--spacing-lg);
}

.title-line {
    display: block;
    font-size: clamp(3rem, 10vw, 6rem);
    font-weight: 900;
    letter-spacing: -0.03em;
    line-height: 1.1;
    background: linear-gradient(180deg, #fff 0%, rgba(255, 255, 255, 0.7) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.title-sub {
    display: block;
    font-size: clamp(1rem, 3vw, 1.5rem);
    font-weight: 400;
    color: var(--text-secondary);
    margin-top: var(--spacing-sm);
    letter-spacing: 0.02em;
}

.hero-description {
    font-size: 1.1rem;
    color: var(--text-secondary);
    max-width: 600px;
    margin: 0 auto var(--spacing-xl);
    line-height: 1.8;
}

.hero-stats {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: var(--spacing-xl);
    flex-wrap: wrap;
}

.stat-item {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 0.25rem;
}

.stat-number {
    font-size: 2rem;
    font-weight: 700;
    background: var(--gradient-blue);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.stat-label {
    font-size: 0.85rem;
    color: var(--text-tertiary);
}

.stat-divider {
    width: 1px;
    height: 40px;
    background: rgba(255, 255, 255, 0.1);
}

/* 滚动指示器 */
.scroll-indicator {
    position: absolute;
    bottom: var(--spacing-xl);
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--spacing-sm);
}

.scroll-mouse {
    width: 26px;
    height: 40px;
    border: 2px solid rgba(255, 255, 255, 0.3);
    border-radius: 13px;
    position: relative;
}

.scroll-wheel {
    width: 4px;
    height: 8px;
    background: rgba(255, 255, 255, 0.5);
    border-radius: 2px;
    position: absolute;
    top: 8px;
    left: 50%;
    transform: translateX(-50%);
    animation: scrollWheel 2s ease-in-out infinite;
}

@keyframes scrollWheel {
    0% {
        opacity: 1;
        transform: translateX(-50%) translateY(0);
    }
    100% {
        opacity: 0;
        transform: translateX(-50%) translateY(12px);
    }
}

.scroll-text {
    font-size: 0.8rem;
    color: var(--text-tertiary);
}

/* ============================================
   章节通用样式
   ============================================ */
.chapter {
    padding: var(--spacing-xxl) var(--spacing-lg);
    position: relative;
}

.chapter-dark {
    background: var(--bg-primary);
}

.chapter-gradient {
    background: linear-gradient(180deg, var(--bg-primary) 0%, var(--bg-secondary) 50%, var(--bg-primary) 100%);
}

.chapter-gradient-alt {
    background: linear-gradient(180deg, var(--bg-secondary) 0%, var(--bg-primary) 50%, var(--bg-secondary) 100%);
}

.chapter-header {
    text-align: center;
    margin-bottom: var(--spacing-xxl);
}

.chapter-number {
    font-size: 5rem;
    font-weight: 900;
    background: var(--gradient-blue);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    opacity: 0.5;
    line-height: 1;
    margin-bottom: var(--spacing-sm);
}

.chapter-title {
    font-size: clamp(2.5rem, 6vw, 4rem);
    font-weight: 800;
    letter-spacing: -0.02em;
    margin-bottom: var(--spacing-sm);
}

.chapter-subtitle {
    font-size: 1.1rem;
    color: var(--text-secondary);
}

.chapter-intro {
    text-align: center;
    max-width: 700px;
    margin: 0 auto var(--spacing-xxl);
    font-size: 1.1rem;
    color: var(--text-secondary);
    line-height: 1.8;
}

.section-title {
    font-size: 1.5rem;
    font-weight: 700;
    margin-bottom: var(--spacing-lg);
    text-align: center;
}

.section-desc {
    text-align: center;
    color: var(--text-secondary);
    margin-bottom: var(--spacing-xl);
}

/* ============================================
   时间轴
   ============================================ */
.timeline-container {
    max-width: 900px;
    margin: 0 auto;
    position: relative;
    padding: var(--spacing-lg) 0;
}

.timeline-line {
    position: absolute;
    left: 50%;
    top: 0;
    bottom: 0;
    width: 2px;
    background: linear-gradient(180deg, transparent 0%, var(--accent-blue) 20%, var(--accent-purple) 80%, transparent 100%);
    transform: translateX(-50%);
}

.timeline-item {
    display: flex;
    align-items: center;
    margin-bottom: var(--spacing-xxl);
    position: relative;
}

.timeline-item:nth-child(odd) {
    flex-direction: row-reverse;
}

.timeline-item:nth-child(odd) .timeline-content {
    text-align: right;
    padding-right: var(--spacing-xxl);
    padding-left: 0;
}

.timeline-content {
    width: 50%;
    padding-left: var(--spacing-xxl);
}

.timeline-dot {
    position: absolute;
    left: 50%;
    transform: translateX(-50%);
    width: 16px;
    height: 16px;
    background: var(--bg-primary);
    border: 3px solid var(--accent-blue);
    border-radius: 50%;
    z-index: 1;
}

.timeline-year {
    display: inline-block;
    font-size: 0.85rem;
    font-weight: 600;
    color: var(--accent-blue);
    margin-bottom: 0.5rem;
}

.timeline-title {
    font-size: 1.3rem;
    font-weight: 700;
    margin-bottom: 0.5rem;
}

.timeline-desc {
    font-size: 0.95rem;
    color: var(--text-secondary);
    line-height: 1.7;
    margin-bottom: var(--spacing-sm);
}

.timeline-tag {
    display: inline-block;
    padding: 0.25rem 0.75rem;
    background: rgba(0, 122, 255, 0.1);
    border: 1px solid rgba(0, 122, 255, 0.3);
    border-radius: 100px;
    font-size: 0.75rem;
    color: var(--accent-blue);
}

.timeline-tag.highlight {
    background: rgba(255, 149, 0, 0.1);
    border-color: rgba(255, 149, 0, 0.3);
    color: var(--accent-orange);
}

.timeline-tags {
    display: flex;
    gap: 0.5rem;
    flex-wrap: wrap;
}

.timeline-tags .tag {
    padding: 0.25rem 0.75rem;
    background: rgba(255, 255, 255, 0.05);
    border-radius: 100px;
    font-size: 0.75rem;
    color: var(--text-secondary);
}

.timeline-tags .tag.warning {
    background: rgba(255, 59, 48, 0.1);
    color: #FF3B30;
}

/* 洞察框 */
.insight-box {
    max-width: 700px;
    margin: var(--spacing-xxl) auto 0;
    padding: var(--spacing-lg);
    background: var(--bg-card);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: var(--radius-lg);
    display: flex;
    gap: var(--spacing-md);
    align-items: flex-start;
}

.insight-icon {
    font-size: 2rem;
    flex-shrink: 0;
}

.insight-content h4 {
    font-size: 1.1rem;
    margin-bottom: 0.5rem;
}

.insight-content p {
    font-size: 0.95rem;
    color: var(--text-secondary);
    line-height: 1.7;
}

/* ============================================
   学科轮播
   ============================================ */
.discipline-carousel {
    max-width: 800px;
    margin: 0 auto var(--spacing-xxl);
}

.carousel-container {
    position: relative;
}

.carousel-track {
    display: flex;
    transition: transform var(--transition-slow);
}

.discipline-card {
    min-width: 100%;
    padding: var(--spacing-xl);
    background: var(--bg-card);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: var(--radius-xl);
    text-align: center;
    opacity: 0.5;
    transform: scale(0.95);
    transition: var(--transition-normal);
}

.discipline-card.active {
    opacity: 1;
    transform: scale(1);
}

.card-icon {
    font-size: 3rem;
    margin-bottom: var(--spacing-md);
}

.discipline-card h3 {
    font-size: 1.5rem;
    margin-bottom: 0.5rem;
}

.discipline-card > p {
    color: var(--text-secondary);
    margin-bottom: var(--spacing-md);
}

.discipline-card ul {
    list-style: none;
    text-align: left;
    max-width: 300px;
    margin: 0 auto var(--spacing-md);
}

.discipline-card li {
    padding: 0.5rem 0;
    padding-left: 1.5rem;
    position: relative;
    color: var(--text-secondary);
    font-size: 0.95rem;
}

.discipline-card li::before {
    content: '•';
    position: absolute;
    left: 0;
    color: var(--accent-blue);
}

.evidence-badge {
    display: inline-block;
    padding: 0.5rem 1rem;
    background: rgba(52, 199, 89, 0.1);
    border: 1px solid rgba(52, 199, 89, 0.3);
    border-radius: 100px;
    font-size: 0.8rem;
    color: var(--evidence-a);
}

.carousel-nav {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: var(--spacing-md);
    margin-top: var(--spacing-lg);
}

.carousel-btn {
    width: 44px;
    height: 44px;
    border-radius: 50%;
    background: var(--bg-card);
    border: 1px solid rgba(255, 255, 255, 0.1);
    color: var(--text-primary);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: var(--transition-fast);
}

.carousel-btn:hover {
    background: rgba(255, 255, 255, 0.1);
}

.carousel-btn svg {
    width: 20px;
    height: 20px;
}

.carousel-dots {
    display: flex;
    gap: 0.5rem;
}

.carousel-dot {
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.2);
    cursor: pointer;
    transition: var(--transition-fast);
}

.carousel-dot.active {
    background: var(--accent-blue);
    width: 24px;
    border-radius: 4px;
}

/* 技术网格 */
.tech-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: var(--spacing-lg);
    max-width: 1000px;
    margin: 0 auto;
}

.tech-card {
    padding: var(--spacing-lg);
    background: var(--bg-card);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: var(--radius-lg);
    text-align: center;
    transition: var(--transition-normal);
}

.tech-card:hover {
    transform: translateY(-4px);
    border-color: rgba(255, 255, 255, 0.2);
}

.tech-visual {
    height: 120px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: var(--spacing-md);
}

.tech-animation {
    width: 80px;
    height: 80px;
    border-radius: 50%;
    background: var(--gradient-blue);
    animation: techPulse 3s ease-in-out infinite;
}

@keyframes techPulse {
    0%, 100% {
        transform: scale(1);
        opacity: 0.8;
    }
    50% {
        transform: scale(1.1);
        opacity: 1;
    }
}

.tech-card h4 {
    font-size: 1.2rem;
    margin-bottom: 0.5rem;
}

.tech-card p {
    font-size: 0.9rem;
    color: var(--text-secondary);
    line-height: 1.6;
}

/* ============================================
   畜牧业启示
   ============================================ */
.livestock-section {
    max-width: 1000px;
    margin: 0 auto;
}

.species-comparison {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-xl);
    margin-bottom: var(--spacing-xxl);
    flex-wrap: wrap;
}

.species-card {
    flex: 1;
    min-width: 280px;
    max-width: 350px;
    padding: var(--spacing-xl);
    background: var(--bg-card);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: var(--radius-xl);
    text-align: center;
}

.species-card.livestock {
    border-color: rgba(255, 149, 0, 0.3);
}

.species-icon {
    font-size: 4rem;
    margin-bottom: var(--spacing-md);
}

.species-card h3 {
    font-size: 1.3rem;
    margin-bottom: var(--spacing-lg);
}

.species-timeline {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-md);
}

.st-item {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: var(--spacing-sm);
    background: rgba(255, 255, 255, 0.03);
    border-radius: var(--radius-md);
}

.st-year {
    font-weight: 700;
    color: var(--accent-blue);
}

.st-event {
    font-size: 0.9rem;
    color: var(--text-secondary);
}

.knowledge-flow {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
}

.flow-arrows {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 8px;
}

.arrow-row {
    display: flex;
    align-items: center;
    width: 80px;
    height: 2px;
    position: relative;
}

.top-arrow {
    justify-content: flex-start;
}

.top-arrow .arrow-line {
    flex: 1;
    height: 2px;
    background: var(--gradient-gold);
    margin-left: 8px;
}

.top-arrow .arrow-head-left {
    font-size: 1.2rem;
    color: var(--accent-orange);
    line-height: 1;
}

.bottom-arrow {
    justify-content: flex-end;
}

.bottom-arrow .arrow-line {
    flex: 1;
    height: 2px;
    background: var(--gradient-gold);
    margin-right: 8px;
}

.bottom-arrow .arrow-head {
    font-size: 1.2rem;
    color: var(--accent-orange);
    line-height: 1;
}

.flow-label {
    font-size: 0.8rem;
    color: var(--accent-orange);
    padding: 0.25rem 0.75rem;
    background: rgba(255, 149, 0, 0.1);
    border-radius: 100px;
    white-space: nowrap;
}

.knowledge-transfer {
    margin-top: var(--spacing-xxl);
}

.transfer-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: var(--spacing-lg);
}

.transfer-item {
    padding: var(--spacing-lg);
    background: var(--bg-card);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: var(--radius-lg);
    transition: var(--transition-normal);
}

.transfer-item:hover {
    border-color: rgba(255, 149, 0, 0.3);
}

.transfer-icon {
    font-size: 2.5rem;
    margin-bottom: var(--spacing-sm);
}

.transfer-item h4 {
    font-size: 1.1rem;
    margin-bottom: 0.5rem;
}

.transfer-item p {
    font-size: 0.9rem;
    color: var(--text-secondary);
    line-height: 1.6;
}


/* ============================================
   技术展示网格
   ============================================ */
.tech-showcase {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: var(--spacing-lg);
    max-width: 1200px;
    margin: 0 auto var(--spacing-xxl);
}

.showcase-card {
    padding: var(--spacing-lg);
    background: var(--bg-card);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: var(--radius-xl);
    position: relative;
    overflow: hidden;
    transition: var(--transition-normal);
}

.showcase-card:hover {
    transform: translateY(-4px);
    border-color: rgba(255, 255, 255, 0.2);
}

.showcase-card.large {
    grid-column: span 2;
    display: flex;
    align-items: center;
    gap: var(--spacing-xl);
}

.showcase-tag {
    display: inline-block;
    padding: 0.25rem 0.75rem;
    background: var(--gradient-blue);
    border-radius: 100px;
    font-size: 0.75rem;
    font-weight: 600;
    margin-bottom: var(--spacing-sm);
}

.showcase-card h3 {
    font-size: 1.3rem;
    margin-bottom: var(--spacing-sm);
}

.showcase-card p {
    font-size: 0.95rem;
    color: var(--text-secondary);
    line-height: 1.7;
}

.showcase-metric {
    margin-top: var(--spacing-md);
    padding-top: var(--spacing-md);
    border-top: 1px solid rgba(255, 255, 255, 0.1);
}

.metric-value {
    display: block;
    font-size: 2rem;
    font-weight: 700;
    background: var(--gradient-green);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.metric-label {
    font-size: 0.85rem;
    color: var(--text-tertiary);
}

.showcase-visual {
    width: 150px;
    height: 150px;
    flex-shrink: 0;
}

.dna-helix {
    background: linear-gradient(45deg, var(--accent-blue), var(--accent-purple));
    border-radius: 50%;
    animation: dnaRotate 10s linear infinite;
}

@keyframes dnaRotate {
    from {
        transform: rotate(0deg);
    }
    to {
        transform: rotate(360deg);
    }
}

/* ============================================
   可交互临床决策流程图
   ============================================ */
.flowchart-section {
    max-width: 1000px;
    margin: 0 auto var(--spacing-xxl);
}

.interactive-flowchart {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-md);
}

.flow-level {
    background: var(--bg-card);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: var(--radius-xl);
    padding: var(--spacing-md);
    transition: var(--transition-normal);
}

.flow-level:hover {
    border-color: rgba(255, 255, 255, 0.2);
}

.level-header {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    margin-bottom: var(--spacing-md);
}

.level-num {
    width: 32px;
    height: 32px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--gradient-blue);
    border-radius: 50%;
    font-weight: 700;
    font-size: 0.9rem;
}

.level-header h4 {
    font-size: 1.1rem;
    flex: 1;
}

.level-badge {
    padding: 0.25rem 0.75rem;
    background: rgba(255, 255, 255, 0.05);
    border-radius: 100px;
    font-size: 0.75rem;
    color: var(--text-secondary);
}

.level-nodes {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(120px, 1fr));
    gap: 0.75rem;
}

.flow-node {
    padding: var(--spacing-sm);
    background: rgba(255, 255, 255, 0.03);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: var(--radius-md);
    text-align: center;
    cursor: pointer;
    transition: var(--transition-fast);
    position: relative;
}

.flow-node:hover {
    background: rgba(255, 255, 255, 0.06);
    border-color: var(--accent-blue);
    transform: translateY(-2px);
}

.node-icon {
    font-size: 1.5rem;
    margin-bottom: 0.5rem;
}

.node-name {
    display: block;
    font-size: 0.85rem;
    font-weight: 500;
    margin-bottom: 0.25rem;
}

.node-evidence {
    display: inline-block;
    padding: 0.15rem 0.5rem;
    background: rgba(52, 199, 89, 0.1);
    border-radius: 100px;
    font-size: 0.7rem;
    color: var(--evidence-a);
}

.level-2 .node-evidence {
    background: rgba(90, 200, 250, 0.1);
    color: var(--evidence-b);
}

.level-3 .node-evidence {
    background: rgba(255, 149, 0, 0.1);
    color: var(--evidence-c);
}

.level-4 .node-evidence {
    background: rgba(255, 59, 48, 0.1);
    color: var(--evidence-d);
}

.flow-arrow-down {
    text-align: center;
    font-size: 1.2rem;
    color: var(--text-tertiary);
    animation: arrowBounce 2s ease-in-out infinite;
    margin: 0.25rem 0;
}

@keyframes arrowBounce {
    0%, 100% {
        transform: translateY(0);
    }
    50% {
        transform: translateY(3px);
    }
}

/* 节点详情弹窗 */
.node-modal {
    position: fixed;
    inset: 0;
    background: rgba(0, 0, 0, 0.8);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    z-index: 2000;
    display: none;
    align-items: center;
    justify-content: center;
    padding: var(--spacing-lg);
}

.node-modal.active {
    display: flex;
}

.modal-content {
    background: var(--bg-secondary);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: var(--radius-xl);
    max-width: 500px;
    width: 90%;
    max-height: 80vh;
    overflow-y: auto;
    position: relative;
}

/* 弹窗居中样式 */
.modal-content-centered {
    position: fixed !important;
    top: 50% !important;
    left: 50% !important;
    transform: translate(-50%, -50%) !important;
    margin: 0 !important;
}

@keyframes modalSlideIn {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.modal-close {
    position: absolute;
    top: var(--spacing-sm);
    right: var(--spacing-sm);
    width: 36px;
    height: 36px;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.05);
    border: none;
    color: var(--text-secondary);
    font-size: 1.5rem;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: var(--transition-fast);
}

.modal-close:hover {
    background: rgba(255, 255, 255, 0.1);
    color: var(--text-primary);
}

.modal-header {
    padding: var(--spacing-lg);
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
}

.modal-icon {
    font-size: 2rem;
}

.modal-title {
    flex: 1;
    font-size: 1.2rem;
}

.modal-evidence {
    padding: 0.25rem 0.75rem;
    background: rgba(52, 199, 89, 0.1);
    border-radius: 100px;
    font-size: 0.75rem;
    color: var(--evidence-a);
}

.modal-body {
    padding: var(--spacing-lg);
}

.modal-description {
    font-size: 0.95rem;
    color: var(--text-secondary);
    line-height: 1.7;
    margin-bottom: var(--spacing-md);
}

.modal-recommendations h5 {
    font-size: 0.9rem;
    margin-bottom: var(--spacing-sm);
    color: var(--text-primary);
}

.modal-recommendations ul {
    list-style: none;
}

.modal-recommendations li {
    padding: 0.5rem 0;
    padding-left: 1.5rem;
    position: relative;
    font-size: 0.9rem;
    color: var(--text-secondary);
}

.modal-recommendations li::before {
    content: '✓';
    position: absolute;
    left: 0;
    color: var(--accent-green);
}

/* ============================================
   成功率数据展示
   ============================================ */
.success-data {
    max-width: 1000px;
    margin: 0 auto;
}

.data-cards {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: var(--spacing-lg);
}

.data-card {
    padding: var(--spacing-lg);
    background: var(--bg-card);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: var(--radius-xl);
    text-align: center;
    transition: var(--transition-normal);
}

.data-card:hover {
    border-color: rgba(255, 255, 255, 0.2);
}

.data-chart {
    width: 100px;
    height: 100px;
    margin: 0 auto var(--spacing-md);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
}

/* 饼图百分比 - 使用CSS变量 */
.data-chart[data-percent="55"] {
    background: conic-gradient(var(--accent-blue) 0% 55%, rgba(255, 255, 255, 0.1) 55% 100%);
}

.data-chart[data-percent="30"] {
    background: conic-gradient(var(--accent-teal) 0% 30%, rgba(255, 255, 255, 0.1) 30% 100%);
}

.data-chart[data-percent="15"] {
    background: conic-gradient(var(--accent-orange) 0% 15%, rgba(255, 255, 255, 0.1) 15% 100%);
}

.data-chart::after {
    content: '';
    width: 80px;
    height: 80px;
    background: var(--bg-card);
    border-radius: 50%;
}

.data-info {
    display: flex;
    flex-direction: column;
    gap: 0.25rem;
}

.data-value {
    font-size: 2rem;
    font-weight: 700;
    background: var(--gradient-blue);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.data-label {
    font-size: 0.9rem;
    color: var(--text-secondary);
}

/* ============================================
   第五章：边界
   ============================================ */
.mystery-section {
    max-width: 1000px;
    margin: 0 auto;
}

.mystery-card {
    padding: var(--spacing-xl);
    background: var(--bg-card);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: var(--radius-xl);
    text-align: center;
    margin-bottom: var(--spacing-xxl);
}

.mystery-visual {
    width: 100px;
    height: 100px;
    margin: 0 auto var(--spacing-md);
    display: flex;
    align-items: center;
    justify-content: center;
}

.question-mark {
    font-size: 5rem;
    font-weight: 900;
    background: var(--gradient-purple);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    animation: questionPulse 3s ease-in-out infinite;
}

@keyframes questionPulse {
    0%, 100% {
        opacity: 0.5;
        transform: scale(1);
    }
    50% {
        opacity: 1;
        transform: scale(1.05);
    }
}

.mystery-card h3 {
    font-size: 1.5rem;
    margin-bottom: var(--spacing-sm);
}

.mystery-card > p {
    color: var(--text-secondary);
    max-width: 600px;
    margin: 0 auto var(--spacing-lg);
    line-height: 1.7;
}

.mystery-stats {
    display: flex;
    justify-content: center;
    gap: var(--spacing-xl);
    flex-wrap: wrap;
}

.m-stat {
    text-align: center;
}

.m-value {
    display: block;
    font-size: 2.5rem;
    font-weight: 700;
    background: var(--gradient-blue);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.m-label {
    font-size: 0.85rem;
    color: var(--text-secondary);
}

/* 证据等级分析 */
.evidence-analysis {
    margin-bottom: var(--spacing-xxl);
}

.evidence-bars {
    max-width: 700px;
    margin: 0 auto;
    display: flex;
    flex-direction: column;
    gap: var(--spacing-md);
}

.evidence-item {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
}

.evi-name {
    width: 180px;
    font-size: 0.9rem;
    color: var(--text-secondary);
    flex-shrink: 0;
}

.evi-bar {
    flex: 1;
    height: 8px;
    background: rgba(255, 255, 255, 0.05);
    border-radius: 4px;
    overflow: hidden;
}

.evi-fill {
    height: 100%;
    border-radius: 4px;
    background: var(--gradient-green);
    transition: width 1s ease;
}

.evi-fill[data-level="A"] {
    background: var(--evidence-a);
}

.evi-fill[data-level="A-B"] {
    background: linear-gradient(90deg, var(--evidence-a), var(--evidence-b));
}

.evi-fill[data-level="C"] {
    background: var(--evidence-c);
}

.evi-level {
    width: 40px;
    text-align: right;
    font-size: 0.85rem;
    font-weight: 600;
    color: var(--text-secondary);
}

/* 未来研究方向 */
.future-research {
    margin-bottom: var(--spacing-xxl);
}

.research-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: var(--spacing-lg);
}

.research-item {
    padding: var(--spacing-lg);
    background: var(--bg-card);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: var(--radius-lg);
    transition: var(--transition-normal);
}

.research-item:hover {
    border-color: var(--accent-purple);
    transform: translateY(-4px);
}

.research-num {
    font-size: 2.5rem;
    font-weight: 900;
    color: rgba(255, 255, 255, 0.1);
    line-height: 1;
    margin-bottom: var(--spacing-sm);
}

.research-item h4 {
    font-size: 1.1rem;
    margin-bottom: 0.5rem;
}

.research-item p {
    font-size: 0.9rem;
    color: var(--text-secondary);
    line-height: 1.6;
}

/* ============================================
   结语
   ============================================ */
.conclusion {
    padding-bottom: 0;
}

.conclusion-content {
    max-width: 800px;
    margin: 0 auto;
    text-align: center;
}

.conclusion-text {
    margin-bottom: var(--spacing-xxl);
}

.conclusion-text p {
    font-size: 1.1rem;
    color: var(--text-secondary);
    line-height: 1.9;
    margin-bottom: var(--spacing-md);
}

.tech-preview {
    margin-bottom: var(--spacing-xxl);
}

.preview-title {
    font-size: 1.3rem;
    margin-bottom: var(--spacing-lg);
}

.preview-grid {
    display: flex;
    justify-content: center;
    gap: var(--spacing-lg);
    flex-wrap: wrap;
}

.preview-item {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--spacing-sm);
    padding: var(--spacing-md);
    background: var(--bg-card);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: var(--radius-lg);
    min-width: 100px;
    transition: var(--transition-normal);
}

.preview-item:hover {
    border-color: var(--accent-blue);
    transform: translateY(-4px);
}

.preview-icon {
    font-size: 2rem;
}

.preview-item span {
    font-size: 0.85rem;
    color: var(--text-secondary);
}

/* 分享区域 */
.share-section {
    padding: var(--spacing-xxl) var(--spacing-lg);
    background: linear-gradient(180deg, transparent 0%, rgba(0, 122, 255, 0.05) 100%);
    border-radius: var(--radius-xl) var(--radius-xl) 0 0;
}

.share-title {
    font-size: 1.5rem;
    margin-bottom: 0.5rem;
}

.share-section > p {
    color: var(--text-secondary);
    margin-bottom: var(--spacing-lg);
}

.share-btn {
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-sm);
    padding: var(--spacing-md) var(--spacing-xl);
    background: var(--gradient-blue);
    border: none;
    border-radius: 100px;
    color: white;
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition-fast);
}

.share-btn:hover {
    transform: scale(1.05);
    box-shadow: var(--shadow-glow);
}

.btn-icon {
    font-size: 1.2rem;
}

/* 海报弹窗 */
.poster-modal {
    position: fixed;
    inset: 0;
    background: rgba(0, 0, 0, 0.9);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    z-index: 3000;
    display: none;
    align-items: center;
    justify-content: center;
    padding: var(--spacing-lg);
}

.poster-modal.active {
    display: flex;
}

.poster-content {
    max-width: 400px;
    width: 100%;
    position: relative;
}

.poster-close {
    position: absolute;
    top: -40px;
    right: 0;
    width: 36px;
    height: 36px;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.1);
    border: none;
    color: var(--text-primary);
    font-size: 1.5rem;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: var(--transition-fast);
}

.poster-close:hover {
    background: rgba(255, 255, 255, 0.2);
}

.poster-preview {
    background: linear-gradient(180deg, #1a1a2e 0%, #16213e 100%);
    border-radius: var(--radius-xl);
    overflow: hidden;
    aspect-ratio: 3/4;
    display: flex;
    flex-direction: column;
}

.poster-header {
    padding: var(--spacing-lg);
    text-align: center;
    background: rgba(0, 0, 0, 0.2);
}

.poster-badge {
    display: inline-block;
    padding: 0.25rem 0.75rem;
    background: rgba(0, 122, 255, 0.2);
    border-radius: 100px;
    font-size: 0.75rem;
    color: var(--accent-blue);
    margin-bottom: var(--spacing-sm);
}

.poster-header h2 {
    font-size: 1.8rem;
    margin-bottom: 0.5rem;
}

.poster-header p {
    font-size: 0.9rem;
    color: var(--text-secondary);
}

.poster-body {
    flex: 1;
    padding: var(--spacing-lg);
    display: flex;
    flex-direction: column;
    justify-content: center;
    gap: var(--spacing-xl);
}

.poster-stats {
    display: flex;
    justify-content: center;
    gap: var(--spacing-xl);
}

.p-stat {
    text-align: center;
}

.p-num {
    display: block;
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--accent-blue);
}

.p-label {
    font-size: 0.8rem;
    color: var(--text-secondary);
}

.poster-timeline {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-sm);
}

.p-item {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: var(--spacing-sm);
    background: rgba(255, 255, 255, 0.03);
    border-radius: var(--radius-md);
}

.p-year {
    font-weight: 700;
    color: var(--accent-blue);
}

.p-event {
    font-size: 0.9rem;
    color: var(--text-secondary);
}

.poster-footer {
    padding: var(--spacing-md);
    text-align: center;
    background: rgba(0, 0, 0, 0.2);
}

.poster-footer p {
    font-size: 0.85rem;
    color: var(--text-tertiary);
}

.poster-actions {
    margin-top: var(--spacing-lg);
    text-align: center;
}

.poster-download {
    padding: var(--spacing-sm) var(--spacing-xl);
    background: var(--gradient-blue);
    border: none;
    border-radius: 100px;
    color: white;
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition-fast);
}

.poster-download:hover {
    transform: scale(1.05);
    box-shadow: var(--shadow-glow);
}

/* ============================================
   Footer
   ============================================ */
.main-footer {
    margin-top: var(--spacing-xxl);
    padding: var(--spacing-xxl) var(--spacing-lg);
    background: var(--bg-secondary);
    border-top: 1px solid rgba(255, 255, 255, 0.05);
}

.footer-content {
    max-width: 1200px;
    margin: 0 auto;
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: var(--spacing-xl);
}

.footer-section h4 {
    font-size: 1rem;
    margin-bottom: var(--spacing-md);
    color: var(--text-primary);
}

.footer-section p,
.footer-section li {
    font-size: 0.9rem;
    color: var(--text-secondary);
    line-height: 1.7;
}

.footer-section ul {
    list-style: none;
}

.footer-section li {
    padding: 0.25rem 0;
}

.footer-bottom {
    max-width: 1200px;
    margin: var(--spacing-xl) auto 0;
    padding-top: var(--spacing-lg);
    border-top: 1px solid rgba(255, 255, 255, 0.05);
    text-align: center;
}

.footer-bottom p {
    font-size: 0.85rem;
    color: var(--text-tertiary);
}

/* ============================================
   返回顶部按钮
   ============================================ */
.back-to-top {
    position: fixed;
    bottom: var(--spacing-lg);
    right: var(--spacing-lg);
    width: 48px;
    height: 48px;
    border-radius: 50%;
    background: var(--bg-card);
    border: 1px solid rgba(255, 255, 255, 0.1);
    color: var(--text-primary);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    visibility: hidden;
    transition: var(--transition-normal);
    z-index: 999;
}

.back-to-top.visible {
    opacity: 1;
    visibility: visible;
}

.back-to-top:hover {
    background: rgba(255, 255, 255, 0.1);
    transform: translateY(-4px);
}

.back-to-top svg {
    width: 20px;
    height: 20px;
}

/* ============================================
   滚动揭示动画
   ============================================ */
[data-reveal] {
    opacity: 0;
    transform: translateY(30px);
    transition: opacity 0.6s ease, transform 0.6s ease;
}

[data-reveal].revealed {
    opacity: 1;
    transform: translateY(0);
}

[data-reveal="fade-up"] {
    transform: translateY(30px);
}

[data-reveal="slide-right"] {
    transform: translateX(-50px);
}

[data-reveal="slide-left"] {
    transform: translateX(50px);
}

[data-reveal].revealed[data-reveal="slide-right"],
[data-reveal].revealed[data-reveal="slide-left"] {
    transform: translateX(0);
}

[data-delay="100"] {
    transition-delay: 0.1s;
}

[data-delay="200"] {
    transition-delay: 0.2s;
}

[data-delay="300"] {
    transition-delay: 0.3s;
}

[data-delay="400"] {
    transition-delay: 0.4s;
}

[data-delay="500"] {
    transition-delay: 0.5s;
}


/* ============================================
   响应式设计
   ============================================ */
@media (max-width: 1024px) {
    .showcase-card.large {
        grid-column: span 1;
        flex-direction: column;
    }
    
    .showcase-visual {
        width: 100px;
        height: 100px;
    }
}

@media (max-width: 768px) {
    :root {
        --spacing-xxl: 3rem;
        --spacing-xl: 2rem;
    }
    
    .nav-menu {
        position: fixed;
        top: 60px;
        left: 0;
        right: 0;
        background: rgba(0, 0, 0, 0.95);
        backdrop-filter: blur(20px);
        flex-direction: column;
        padding: var(--spacing-lg);
        gap: var(--spacing-md);
        transform: translateY(-100%);
        opacity: 0;
        visibility: hidden;
        transition: var(--transition-normal);
    }
    
    .nav-menu.active {
        transform: translateY(0);
        opacity: 1;
        visibility: visible;
    }
    
    .nav-toggle {
        display: flex;
    }
    
    .hero-stats {
        flex-direction: column;
        gap: var(--spacing-lg);
    }
    
    .stat-divider {
        width: 40px;
        height: 1px;
    }
    
    .timeline-line {
        left: 20px;
    }
    
    .timeline-item,
    .timeline-item:nth-child(odd) {
        flex-direction: column;
        align-items: flex-start;
        padding-left: 50px;
    }
    
    .timeline-item:nth-child(odd) .timeline-content,
    .timeline-content {
        width: 100%;
        text-align: left;
        padding-left: 0;
        padding-right: 0;
    }
    
    .timeline-dot {
        left: 20px;
        transform: translateX(-50%);
    }
    
    .species-comparison {
        flex-direction: column;
    }
    
    .knowledge-flow {
        transform: rotate(90deg);
        margin: var(--spacing-lg) 0;
    }
    
    .flow-label {
        transform: rotate(-90deg);
    }
    
    .level-nodes {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .evidence-item {
        flex-wrap: wrap;
    }
    
    .evi-name {
        width: 100%;
        margin-bottom: 0.5rem;
    }
    
    .preview-grid {
        display: grid;
        grid-template-columns: repeat(2, 1fr);
    }
    
    .chapter-number {
        font-size: 3rem;
    }
    
    .chapter-title {
        font-size: 2rem;
    }
}

@media (max-width: 480px) {
    .hero-title .title-line {
        font-size: 2.5rem;
    }
    
    .level-nodes {
        grid-template-columns: 1fr;
    }
    
    .mystery-stats {
        flex-direction: column;
        gap: var(--spacing-lg);
    }
    
    .research-grid {
        grid-template-columns: 1fr;
    }
    
    .footer-content {
        grid-template-columns: 1fr;
        text-align: center;
    }
}

/* ============================================
   减少动画（无障碍）
   ============================================ */
@media (prefers-reduced-motion: reduce) {
    *,
    *::before,
    *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }
    
    html {
        scroll-behavior: auto;
    }
    
    [data-reveal] {
        opacity: 1;
        transform: none;
    }
}

/* ============================================
   高对比度模式
   ============================================ */
@media (prefers-contrast: high) {
    :root {
        --text-secondary: rgba(255, 255, 255, 0.9);
        --text-tertiary: rgba(255, 255, 255, 0.8);
    }
    
    .flow-node,
    .discipline-card,
    .tech-card,
    .showcase-card,
    .data-card {
        border-width: 2px;
    }
}

/* ============================================
   图片样式
   ============================================ */
.image-container {
    max-width: 800px;
    margin: 0 auto;
    padding: var(--spacing-md);
    background: var(--bg-card);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: var(--radius-lg);
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.2);
    overflow: hidden;
}

.responsive-image {
    max-width: 100%;
    height: auto;
    display: block;
    margin: 0 auto;
    border-radius: var(--radius-md);
}

.image-caption {
    text-align: center;
    font-size: 0.9rem;
    color: var(--text-secondary);
    margin-top: var(--spacing-md);
    padding-top: var(--spacing-sm);
    border-top: 1px solid rgba(255, 255, 255, 0.1);
}

/* 图片区块间距 */
.image-section,
.etiology-section,
.evidence-distribution-image,
.forest-plot-section,
.literature-section,
.research-hotspots-section,
.success-rate-trend-section,
.age-correlation-section {
    max-width: 1000px;
    margin: var(--spacing-xxl) auto;
    padding: 0 var(--spacing-lg);
}

/* ============================================
   打印样式
   ============================================ */
@media print {
    .nav-bar,
    .scroll-indicator,
    .back-to-top,
    .share-section,
    .carousel-nav,
    .poster-modal,
    .node-modal {
        display: none !important;
    }
    
    .hero {
        min-height: auto;
        padding: 2rem;
    }
    
    .chapter {
        padding: 2rem;
        page-break-inside: avoid;
    }
    
    body {
        background: white;
        color: black;
    }
    
    .gradient-orb {
        display: none;
    }
}