/* ================================================
   🌊 Aurora Luo - 小雨风格设计系统
   Version: 4.0
   Design: Futuristic + Narrative-Driven
   Color: Cyan-Purple (小雨 + 小落)
   ================================================ */

/* ========== CSS 变量系统 ========== */
:root {
  /* 主色系 - 小雨的青蓝色 */
  --rain-cyan: #00d4ff;
  --rain-blue: #4facfe;
  --rain-light: #00f2fe;

  /* 辅色系 - 小落的粉紫色 */
  --fall-purple: #7c4dff;
  --fall-pink: #f093fb;
  --fall-magenta: #f5576c;

  /* 中性色 - 翡翠绿 */
  --emerald: #10b981;
  --emerald-light: #34d399;

  /* 渐变色 */
  --gradient-rain: linear-gradient(135deg, #4facfe 0%, #00f2fe 100%);
  --gradient-fall: linear-gradient(135deg, #f093fb 0%, #f5576c 100%);
  --gradient-aurora: linear-gradient(135deg, #4facfe 0%, #f093fb 50%, #7c4dff 100%);
  --gradient-cosmic: linear-gradient(135deg, #667eea 0%, #764ba2 100%);

  /* 深色主题 */
  --bg-primary: #0a0a0f;
  --bg-secondary: #13131a;
  --bg-tertiary: #1a1a24;
  --bg-card: rgba(26, 26, 36, 0.8);

  /* 文字颜色 */
  --text-primary: #ffffff;
  --text-secondary: #b4bcd0;
  --text-tertiary: #8b92a8;
  --text-muted: #6b7280;

  /* 玻璃态 */
  --glass-bg: rgba(26, 26, 36, 0.7);
  --glass-border: rgba(255, 255, 255, 0.1);
  --glass-shadow: 0 8px 32px 0 rgba(0, 0, 0, 0.37);

  /* 发光效果 */
  --glow-cyan: 0 0 20px rgba(0, 212, 255, 0.3);
  --glow-purple: 0 0 20px rgba(124, 77, 255, 0.3);
  --glow-pink: 0 0 20px rgba(240, 147, 251, 0.3);

  /* 圆角 */
  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 16px;
  --radius-xl: 24px;

  /* 间距 */
  --space-xs: 0.5rem;
  --space-sm: 1rem;
  --space-md: 1.5rem;
  --space-lg: 2rem;
  --space-xl: 3rem;
  --space-2xl: 4rem;

  /* 字体 */
  --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  --font-mono: 'JetBrains Mono', 'Fira Code', Consolas, monospace;

  /* 动画 */
  --transition-fast: 0.15s ease;
  --transition-base: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  --transition-slow: 0.5s cubic-bezier(0.4, 0, 0.2, 1);

  /* Z-index */
  --z-base: 1;
  --z-dropdown: 1000;
  --z-sticky: 1020;
  --z-fixed: 1030;
  --z-modal: 1040;
  --z-tooltip: 1060;
}

/* ========== 基础重置 ========== */
*,
*::before,
*::after {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

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

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

/* ========== 赛博背景 ========== */
.cyber-background {
  position: fixed;
  inset: 0;
  z-index: -1;
  background: var(--bg-primary);
  overflow: hidden;
}

.cyber-grid {
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(0, 212, 255, 0.03) 1px, transparent 1px),
    linear-gradient(90deg, rgba(0, 212, 255, 0.03) 1px, transparent 1px);
  background-size: 50px 50px;
  animation: gridMove 20s linear infinite;
}

@keyframes gridMove {
  0% {
    transform: translate(0, 0);
  }
  100% {
    transform: translate(50px, 50px);
  }
}

.cyber-glow {
  position: absolute;
  width: 600px;
  height: 600px;
  border-radius: 50%;
  filter: blur(100px);
  opacity: 0.15;
  animation: glowFloat 15s ease-in-out infinite;
}

.glow-1 {
  top: -200px;
  left: -200px;
  background: radial-gradient(circle, var(--rain-cyan), transparent);
  animation-delay: 0s;
}

.glow-2 {
  top: 50%;
  right: -200px;
  background: radial-gradient(circle, var(--fall-purple), transparent);
  animation-delay: 5s;
}

.glow-3 {
  bottom: -200px;
  left: 30%;
  background: radial-gradient(circle, var(--fall-pink), transparent);
  animation-delay: 10s;
}

@keyframes glowFloat {
  0%, 100% {
    transform: translate(0, 0) scale(1);
  }
  33% {
    transform: translate(50px, -80px) scale(1.2);
  }
  66% {
    transform: translate(-30px, 50px) scale(0.8);
  }
}

/* ========== 导航栏 ========== */
.nav-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: var(--z-sticky);
  padding: var(--space-sm) 0;
  background: var(--glass-bg);
  backdrop-filter: blur(20px) saturate(180%);
  border-bottom: 1px solid var(--glass-border);
  transition: all var(--transition-base);
}

.nav-header.scrolled {
  padding: var(--space-xs) 0;
  box-shadow: var(--glass-shadow);
}

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

.nav-brand {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  text-decoration: none;
}

.brand-icon {
  font-size: 2rem;
  background: var(--gradient-aurora);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  animation: iconPulse 3s ease-in-out infinite;
}

@keyframes iconPulse {
  0%, 100% {
    transform: scale(1);
    filter: brightness(1);
  }
  50% {
    transform: scale(1.1);
    filter: brightness(1.3);
  }
}

.brand-text {
  display: flex;
  flex-direction: column;
}

.brand-name {
  font-size: 1.25rem;
  font-weight: 700;
  background: var(--gradient-aurora);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}

.brand-subtitle {
  font-size: 0.75rem;
  color: var(--text-tertiary);
  font-family: var(--font-mono);
}

.nav-links {
  display: flex;
  list-style: none;
  gap: var(--space-md);
}

.nav-link {
  position: relative;
  padding: var(--space-xs) var(--space-sm);
  color: var(--text-secondary);
  text-decoration: none;
  font-weight: 500;
  font-size: 0.9375rem;
  transition: color var(--transition-fast);
}

.nav-link::before {
  content: '';
  position: absolute;
  bottom: -2px;
  left: 0;
  width: 0;
  height: 2px;
  background: var(--gradient-aurora);
  transition: width var(--transition-base);
}

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

.nav-link:hover::before,
.nav-link.active::before {
  width: 100%;
}

.nav-actions {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
}

.partner-link {
  display: flex;
  align-items: center;
  gap: var(--space-xs);
  padding: var(--space-xs) var(--space-md);
  background: var(--gradient-rain);
  color: white;
  border: none;
  border-radius: var(--radius-lg);
  font-weight: 600;
  font-size: 0.875rem;
  text-decoration: none;
  cursor: pointer;
  transition: all var(--transition-base);
  box-shadow: var(--glow-cyan);
}

.partner-link:hover {
  transform: translateY(-2px);
  box-shadow: 0 0 30px rgba(0, 212, 255, 0.5);
}

/* ========== 英雄区 ========== */
.hero-section {
  min-height: 100vh;
  display: flex;
  align-items: center;
  padding: calc(80px + var(--space-2xl)) var(--space-lg) var(--space-2xl);
  position: relative;
}

.hero-container {
  max-width: 1400px;
  margin: 0 auto;
  width: 100%;
}

.hero-content {
  max-width: 800px;
}

.status-badge {
  display: inline-flex;
  align-items: center;
  gap: var(--space-xs);
  padding: var(--space-xs) var(--space-md);
  background: var(--glass-bg);
  backdrop-filter: blur(10px);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-lg);
  font-size: 0.875rem;
  color: var(--text-secondary);
  font-family: var(--font-mono);
  margin-bottom: var(--space-lg);
}

.status-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--emerald);
  box-shadow: 0 0 10px var(--emerald);
  animation: statusPulse 2s ease-in-out infinite;
}

@keyframes statusPulse {
  0%, 100% {
    opacity: 1;
  }
  50% {
    opacity: 0.5;
  }
}

.hero-title {
  font-size: clamp(2.5rem, 8vw, 5rem);
  font-weight: 800;
  line-height: 1.1;
  margin-bottom: var(--space-md);
}

.title-main {
  display: block;
  background: var(--gradient-aurora);
  background-size: 200% auto;
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  animation: gradientFlow 3s ease infinite;
}

@keyframes gradientFlow {
  0%, 100% {
    background-position: 0% center;
  }
  50% {
    background-position: 100% center;
  }
}

.title-sub {
  display: block;
  font-size: clamp(1.5rem, 4vw, 2.5rem);
  color: var(--text-secondary);
  margin-top: var(--space-sm);
}

.hero-description {
  font-size: 1.25rem;
  color: var(--text-secondary);
  margin-bottom: var(--space-xl);
  line-height: 1.8;
}

.hero-actions {
  display: flex;
  gap: var(--space-md);
  flex-wrap: wrap;
  margin-bottom: var(--space-2xl);
}

.btn {
  display: inline-flex;
  align-items: center;
  gap: var(--space-xs);
  padding: 1rem 2rem;
  border-radius: var(--radius-lg);
  font-weight: 600;
  font-size: 1rem;
  text-decoration: none;
  transition: all var(--transition-base);
  cursor: pointer;
  border: 2px solid transparent;
}

.btn-primary {
  background: var(--gradient-fall);
  color: white;
  box-shadow: var(--glow-purple);
}

.btn-primary:hover {
  transform: translateY(-3px);
  box-shadow: 0 0 30px rgba(124, 77, 255, 0.6);
}

.btn-secondary {
  background: transparent;
  color: var(--rain-cyan);
  border-color: var(--rain-cyan);
}

.btn-secondary:hover {
  background: rgba(0, 212, 255, 0.1);
  transform: translateY(-3px);
  box-shadow: var(--glow-cyan);
}

.hero-stats {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
  gap: var(--space-lg);
}

.stat-card {
  padding: var(--space-md);
  background: var(--glass-bg);
  backdrop-filter: blur(20px);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-lg);
  text-align: center;
  transition: all var(--transition-base);
}

.stat-card:hover {
  transform: translateY(-5px);
  border-color: var(--rain-cyan);
  box-shadow: var(--glow-cyan);
}

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

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

.stat-label {
  font-size: 0.875rem;
  color: var(--text-tertiary);
  margin-top: var(--space-xs);
}

/* ========== 通用容器 ========== */
.container {
  max-width: 1400px;
  margin: 0 auto;
  padding: 0 var(--space-lg);
}

.section {
  padding: var(--space-2xl) 0;
}

.section-header {
  text-align: center;
  margin-bottom: var(--space-2xl);
}

.section-badge {
  display: inline-block;
  padding: var(--space-xs) var(--space-md);
  background: var(--glass-bg);
  backdrop-filter: blur(10px);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-lg);
  font-size: 0.875rem;
  color: var(--rain-cyan);
  font-weight: 600;
  font-family: var(--font-mono);
  margin-bottom: var(--space-md);
}

.section-title {
  font-size: clamp(2rem, 5vw, 3.5rem);
  font-weight: 800;
  color: var(--text-primary);
  line-height: 1.2;
  margin-bottom: var(--space-sm);
}

.section-description {
  font-size: 1.125rem;
  color: var(--text-secondary);
  max-width: 700px;
  margin: 0 auto;
}

/* ========== 角色档案 ========== */
.profile-section {
  background: var(--bg-secondary);
}

.profile-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: var(--space-lg);
}

.profile-card {
  padding: var(--space-xl);
  background: var(--glass-bg);
  backdrop-filter: blur(20px);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-xl);
  transition: all var(--transition-base);
  position: relative;
  overflow: hidden;
}

.profile-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 4px;
  background: var(--gradient-aurora);
}

.profile-card:hover {
  transform: translateY(-8px);
  border-color: var(--rain-cyan);
  box-shadow: 0 12px 40px rgba(0, 212, 255, 0.2);
}

.profile-icon {
  font-size: 3.5rem;
  margin-bottom: var(--space-md);
  text-align: center;
}

.profile-card h3 {
  font-size: 1.75rem;
  font-weight: 700;
  margin-bottom: var(--space-sm);
  color: var(--text-primary);
}

.profile-meta {
  display: flex;
  gap: var(--space-sm);
  margin-bottom: var(--space-md);
  flex-wrap: wrap;
}

.meta-tag {
  padding: 0.25rem 0.75rem;
  background: rgba(0, 212, 255, 0.1);
  border: 1px solid rgba(0, 212, 255, 0.3);
  border-radius: var(--radius-sm);
  font-size: 0.75rem;
  color: var(--rain-cyan);
  font-family: var(--font-mono);
}

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

.profile-traits {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: var(--space-xs);
}

.profile-traits li {
  display: flex;
  align-items: center;
  gap: var(--space-xs);
  color: var(--text-secondary);
  font-size: 0.9375rem;
}

.profile-traits li::before {
  content: '→';
  color: var(--rain-cyan);
  font-weight: bold;
}

/* ========== 监控仪表板 ========== */
.dashboard-section {
  background: var(--bg-primary);
}

.dashboard-container {
  padding: var(--space-xl);
  background: var(--glass-bg);
  backdrop-filter: blur(20px);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-xl);
}

.dashboard-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: var(--space-xl);
  flex-wrap: wrap;
  gap: var(--space-md);
}

.dashboard-title {
  font-size: 1.75rem;
  font-weight: 700;
  display: flex;
  align-items: center;
  gap: var(--space-sm);
}

.live-indicator {
  display: flex;
  align-items: center;
  gap: var(--space-xs);
  padding: var(--space-xs) var(--space-md);
  background: rgba(16, 185, 129, 0.1);
  border: 1px solid rgba(16, 185, 129, 0.3);
  border-radius: var(--radius-lg);
  font-size: 0.875rem;
  color: var(--emerald);
  font-family: var(--font-mono);
}

.metrics-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: var(--space-lg);
  margin-bottom: var(--space-xl);
}

.metric-card {
  padding: var(--space-lg);
  background: var(--bg-tertiary);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-lg);
  transition: all var(--transition-base);
}

.metric-card:hover {
  border-color: var(--rain-cyan);
  box-shadow: var(--glow-cyan);
}

.metric-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: var(--space-md);
}

.metric-label {
  font-size: 0.875rem;
  color: var(--text-tertiary);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  font-family: var(--font-mono);
}

.metric-icon-small {
  font-size: 1.5rem;
}

.metric-value {
  font-size: 2.5rem;
  font-weight: 700;
  color: var(--text-primary);
  font-family: var(--font-mono);
  margin-bottom: var(--space-xs);
}

.metric-bar {
  height: 6px;
  background: rgba(255, 255, 255, 0.1);
  border-radius: 3px;
  overflow: hidden;
  margin-bottom: var(--space-xs);
}

.metric-fill {
  height: 100%;
  background: var(--gradient-aurora);
  border-radius: 3px;
  transition: width var(--transition-slow);
}

.metric-change {
  font-size: 0.875rem;
  color: var(--emerald);
  font-family: var(--font-mono);
}

.metric-change.negative {
  color: var(--fall-magenta);
}

/* ========== 能力展示 ========== */
.abilities-section {
  background: var(--bg-secondary);
}

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

.ability-card {
  padding: var(--space-xl);
  background: var(--glass-bg);
  backdrop-filter: blur(20px);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-xl);
  transition: all var(--transition-base);
  position: relative;
  overflow: hidden;
}

.ability-card::after {
  content: '';
  position: absolute;
  top: 50%;
  left: 50%;
  width: 300px;
  height: 300px;
  background: radial-gradient(circle, var(--rain-cyan), transparent 70%);
  transform: translate(-50%, -50%);
  opacity: 0;
  transition: opacity var(--transition-slow);
  pointer-events: none;
  filter: blur(40px);
}

.ability-card:hover::after {
  opacity: 0.1;
}

.ability-card:hover {
  transform: translateY(-8px);
  border-color: var(--rain-cyan);
  box-shadow: var(--glow-cyan);
}

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

.ability-card h3 {
  font-size: 1.5rem;
  font-weight: 700;
  margin-bottom: var(--space-sm);
  color: var(--text-primary);
}

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

.ability-features {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: var(--space-xs);
}

.ability-features li {
  display: flex;
  align-items: flex-start;
  gap: var(--space-xs);
  color: var(--text-secondary);
  font-size: 0.9375rem;
}

.ability-features li::before {
  content: '✦';
  color: var(--fall-purple);
  flex-shrink: 0;
  margin-top: 0.25rem;
}

/* ========== AI 伙伴关系 ========== */
.partnership-section {
  background: var(--bg-primary);
  position: relative;
  overflow: hidden;
}

.partnership-section::before {
  content: '';
  position: absolute;
  top: 50%;
  left: 50%;
  width: 800px;
  height: 800px;
  background: radial-gradient(circle, rgba(0, 212, 255, 0.05), transparent 70%);
  transform: translate(-50%, -50%);
  pointer-events: none;
}

.partnership-container {
  position: relative;
  z-index: var(--z-base);
}

.partnership-visual {
  display: flex;
  justify-content: center;
  align-items: center;
  gap: var(--space-2xl);
  margin-bottom: var(--space-2xl);
  flex-wrap: wrap;
}

.ai-avatar {
  position: relative;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-md);
}

.avatar-circle {
  width: 160px;
  height: 160px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 5rem;
  background: var(--glass-bg);
  backdrop-filter: blur(20px);
  border: 3px solid;
  transition: all var(--transition-base);
  position: relative;
}

.ai-avatar.fall .avatar-circle {
  border-color: var(--fall-purple);
  box-shadow: 0 0 30px rgba(124, 77, 255, 0.3);
}

.ai-avatar.rain .avatar-circle {
  border-color: var(--rain-cyan);
  box-shadow: 0 0 30px rgba(0, 212, 255, 0.3);
}

.ai-avatar:hover .avatar-circle {
  transform: scale(1.1);
}

.avatar-name {
  font-size: 1.5rem;
  font-weight: 700;
  text-align: center;
}

.connection-line {
  flex: 1;
  height: 3px;
  background: var(--gradient-aurora);
  position: relative;
  border-radius: 3px;
  overflow: hidden;
  min-width: 100px;
}

.connection-line::after {
  content: '';
  position: absolute;
  top: 0;
  left: -100%;
  width: 100%;
  height: 100%;
  background: linear-gradient(90deg, transparent, white, transparent);
  animation: dataFlow 2s linear infinite;
}

@keyframes dataFlow {
  to {
    left: 200%;
  }
}

.partnership-description {
  text-align: center;
  max-width: 800px;
  margin: 0 auto var(--space-xl);
}

.partnership-description p {
  font-size: 1.125rem;
  color: var(--text-secondary);
  line-height: 1.8;
  margin-bottom: var(--space-md);
}

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

.partnership-feature {
  padding: var(--space-lg);
  background: var(--glass-bg);
  backdrop-filter: blur(20px);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-lg);
  text-align: center;
}

.partnership-feature h4 {
  font-size: 1.25rem;
  font-weight: 600;
  margin-bottom: var(--space-sm);
  color: var(--text-primary);
}

.partnership-feature p {
  color: var(--text-secondary);
  font-size: 0.9375rem;
}

/* ========== 时间线 ========== */
.timeline-section {
  background: var(--bg-secondary);
}

.timeline-container {
  max-width: 1000px;
  margin: 0 auto;
}

.timeline-track {
  position: relative;
  padding: var(--space-lg) 0;
}

.timeline-track::before {
  content: '';
  position: absolute;
  left: 50%;
  top: 0;
  bottom: 0;
  width: 2px;
  background: linear-gradient(180deg,
    transparent,
    var(--rain-cyan) 10%,
    var(--fall-purple) 50%,
    var(--fall-pink) 90%,
    transparent
  );
  transform: translateX(-50%);
}

.timeline-item {
  position: relative;
  display: flex;
  justify-content: center;
  margin-bottom: var(--space-2xl);
}

.timeline-item:nth-child(odd) .timeline-content {
  margin-right: calc(50% + 60px);
}

.timeline-item:nth-child(even) .timeline-content {
  margin-left: calc(50% + 60px);
}

.timeline-dot {
  position: absolute;
  left: 50%;
  top: 40px;
  transform: translateX(-50%);
  width: 24px;
  height: 24px;
  background: var(--bg-primary);
  border: 4px solid var(--rain-cyan);
  border-radius: 50%;
  z-index: 2;
  box-shadow: 0 0 0 0 rgba(0, 212, 255, 0.4);
  animation: timelinePulse 2s ease-in-out infinite;
}

@keyframes timelinePulse {
  0%, 100% {
    box-shadow: 0 0 0 0 rgba(0, 212, 255, 0.4);
  }
  50% {
    box-shadow: 0 0 0 20px rgba(0, 212, 255, 0);
  }
}

.timeline-content {
  padding: var(--space-xl);
  background: var(--glass-bg);
  backdrop-filter: blur(20px);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-xl);
  max-width: 450px;
  transition: all var(--transition-base);
}

.timeline-content:hover {
  transform: scale(1.05);
  border-color: var(--rain-cyan);
  box-shadow: var(--glow-cyan);
}

.timeline-date {
  display: inline-block;
  padding: 0.25rem 0.75rem;
  background: rgba(0, 212, 255, 0.1);
  border: 1px solid rgba(0, 212, 255, 0.3);
  border-radius: var(--radius-sm);
  font-size: 0.75rem;
  color: var(--rain-cyan);
  font-family: var(--font-mono);
  margin-bottom: var(--space-sm);
}

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

.timeline-content h4 {
  font-size: 1.5rem;
  font-weight: 700;
  margin-bottom: var(--space-sm);
  color: var(--text-primary);
}

.timeline-content p {
  color: var(--text-secondary);
  line-height: 1.6;
}

/* ========== CTA 区域 ========== */
.cta-section {
  background: var(--bg-primary);
  padding: var(--space-2xl) 0;
}

.cta-card {
  position: relative;
  padding: var(--space-2xl);
  background: var(--gradient-aurora);
  border-radius: var(--radius-xl);
  overflow: hidden;
  box-shadow: 0 20px 60px rgba(0, 212, 255, 0.3);
}

.cta-content {
  position: relative;
  z-index: 2;
  text-align: center;
  max-width: 700px;
  margin: 0 auto;
}

.cta-content h2 {
  font-size: clamp(2rem, 4vw, 3rem);
  font-weight: 800;
  color: white;
  margin-bottom: var(--space-md);
}

.cta-content p {
  font-size: 1.25rem;
  color: rgba(255, 255, 255, 0.95);
  margin-bottom: var(--space-xl);
}

.cta-buttons {
  display: flex;
  gap: var(--space-md);
  justify-content: center;
  flex-wrap: wrap;
}

.btn-light {
  background: white;
  color: var(--fall-purple);
}

.btn-light:hover {
  background: rgba(255, 255, 255, 0.9);
  transform: translateY(-3px);
  box-shadow: 0 10px 30px rgba(255, 255, 255, 0.3);
}

.btn-outline {
  background: transparent;
  color: white;
  border-color: white;
}

.btn-outline:hover {
  background: rgba(255, 255, 255, 0.1);
  transform: translateY(-3px);
}

/* ========== 页脚 ========== */
.footer {
  background: var(--bg-tertiary);
  padding: var(--space-2xl) 0 var(--space-lg);
  border-top: 1px solid var(--glass-border);
}

.footer-content {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: var(--space-xl);
  margin-bottom: var(--space-xl);
}

.footer-brand h3 {
  font-size: 1.5rem;
  font-weight: 700;
  margin-bottom: var(--space-sm);
  background: var(--gradient-aurora);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}

.footer-brand p {
  color: var(--text-secondary);
  line-height: 1.6;
}

.footer-column h4 {
  font-weight: 600;
  margin-bottom: var(--space-md);
  color: var(--text-primary);
}

.footer-column a {
  display: block;
  color: var(--text-secondary);
  text-decoration: none;
  margin-bottom: var(--space-xs);
  transition: color var(--transition-fast);
}

.footer-column a:hover {
  color: var(--rain-cyan);
}

.footer-bottom {
  padding-top: var(--space-lg);
  border-top: 1px solid var(--glass-border);
  text-align: center;
  color: var(--text-tertiary);
  font-size: 0.875rem;
  font-family: var(--font-mono);
}

/* ========== 辅助组件 ========== */
.back-to-top {
  position: fixed;
  bottom: var(--space-lg);
  right: var(--space-lg);
  width: 56px;
  height: 56px;
  background: var(--glass-bg);
  backdrop-filter: blur(20px);
  border: 1px solid var(--glass-border);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--text-primary);
  cursor: pointer;
  opacity: 0;
  visibility: hidden;
  transform: translateY(20px);
  transition: all var(--transition-base);
  z-index: var(--z-fixed);
  font-size: 1.5rem;
}

.back-to-top.show {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}

.back-to-top:hover {
  background: var(--rain-cyan);
  color: var(--bg-primary);
  border-color: var(--rain-cyan);
  box-shadow: var(--glow-cyan);
  transform: translateY(-5px);
}

.scroll-progress {
  position: fixed;
  top: 0;
  left: 0;
  height: 4px;
  background: var(--gradient-aurora);
  z-index: var(--z-tooltip);
  transform-origin: left;
  transform: scaleX(0);
  transition: transform 0.1s ease-out;
}

/* ========== AOS 动画 ========== */
[data-aos] {
  opacity: 0;
  transition-property: opacity, transform;
  transition-duration: 0.8s;
  transition-timing-function: cubic-bezier(0.4, 0, 0.2, 1);
}

[data-aos="fade-up"] {
  transform: translateY(40px);
}

[data-aos="fade-down"] {
  transform: translateY(-40px);
}

[data-aos="fade-left"] {
  transform: translateX(-40px);
}

[data-aos="fade-right"] {
  transform: translateX(40px);
}

[data-aos="zoom-in"] {
  transform: scale(0.9);
}

[data-aos].aos-animate {
  opacity: 1;
  transform: none;
}

/* ========== 响应式设计 ========== */
@media (max-width: 1024px) {
  .timeline-item:nth-child(odd) .timeline-content,
  .timeline-item:nth-child(even) .timeline-content {
    margin: 0 0 0 60px;
  }

  .timeline-track::before {
    left: 0;
  }

  .timeline-dot {
    left: 0;
  }
}

@media (max-width: 768px) {
  .nav-links {
    position: fixed;
    top: 70px;
    left: 0;
    right: 0;
    flex-direction: column;
    background: var(--glass-bg);
    backdrop-filter: blur(20px);
    padding: var(--space-lg);
    gap: var(--space-md);
    transform: translateY(-100%);
    opacity: 0;
    transition: all var(--transition-base);
    box-shadow: var(--glass-shadow);
  }

  .nav-links.active {
    transform: translateY(0);
    opacity: 1;
  }

  .hero-section {
    padding: calc(80px + var(--space-xl)) var(--space-md) var(--space-xl);
  }

  .partnership-visual {
    flex-direction: column;
  }

  .connection-line {
    display: none;
  }

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

@media (max-width: 480px) {
  .hero-title {
    font-size: 2rem;
  }

  .section-title {
    font-size: 1.75rem;
  }

  .avatar-circle {
    width: 120px;
    height: 120px;
    font-size: 3.5rem;
  }
}

/* ========== 性能优化 ========== */
.cyber-glow,
.timeline-dot,
.avatar-circle {
  will-change: transform;
}

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
}