/* ============================================
   跑路力 — Premium Dark Glassmorphism Design
   ============================================ */

@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700;800;900&family=Noto+Sans+SC:wght@300;400;500;700;900&display=swap');

/* ---------- Design Tokens ---------- */
:root {
  --bg-deep: #06060f;
  --bg-primary: #0a0a1a;
  --bg-card: rgba(255, 255, 255, 0.04);
  --bg-glass: rgba(255, 255, 255, 0.06);
  --border-glass: rgba(255, 255, 255, 0.08);
  --border-glow: rgba(120, 80, 255, 0.3);

  --text-primary: #f0f0f5;
  --text-secondary: rgba(240, 240, 245, 0.65);
  --text-muted: rgba(240, 240, 245, 0.4);

  --accent-1: #7c5cfc;
  --accent-2: #00d4ff;
  --accent-3: #ff6b9d;
  --accent-4: #ffd93d;
  --accent-5: #4ade80;

  --gradient-hero: linear-gradient(135deg, #7c5cfc 0%, #00d4ff 50%, #ff6b9d 100%);
  --gradient-card: linear-gradient(135deg, rgba(124,92,252,0.12) 0%, rgba(0,212,255,0.08) 100%);
  --gradient-warm: linear-gradient(135deg, #ff6b9d 0%, #ffd93d 100%);
  --gradient-trust: linear-gradient(135deg, rgba(74, 222, 128, 0.1) 0%, rgba(0, 212, 255, 0.08) 100%);

  --glass-blur: 20px;
  --radius-sm: 8px;
  --radius-md: 16px;
  --radius-lg: 24px;
  --radius-xl: 32px;

  --shadow-card: 0 8px 32px rgba(0, 0, 0, 0.4);
  --shadow-glow: 0 0 30px rgba(124, 92, 252, 0.15);

  --ff-cn: 'Noto Sans SC', system-ui, sans-serif;
  --ff-en: 'Inter', system-ui, sans-serif;

  --transition: 0.35s cubic-bezier(0.4, 0, 0.2, 1);
}

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

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

body {
  font-family: var(--ff-cn);
  background: var(--bg-deep);
  color: var(--text-primary);
  line-height: 1.7;
  overflow-x: hidden;
}

::selection { background: var(--accent-1); color: #fff; }

.gradient-text {
  background: var(--gradient-hero);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

/* ---------- Audio Player ---------- */
.audio-player {
  position: fixed;
  bottom: 2rem;
  right: 2rem;
  z-index: 9999;
}

.audio-btn {
  width: 52px;
  height: 52px;
  border-radius: 50%;
  background: rgba(124, 92, 252, 0.15);
  backdrop-filter: blur(var(--glass-blur));
  border: 1px solid rgba(124, 92, 252, 0.3);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: var(--transition);
  position: relative;
}

.audio-btn:hover {
  background: rgba(124, 92, 252, 0.3);
  transform: scale(1.08);
  box-shadow: 0 0 25px rgba(124, 92, 252, 0.4);
}

.audio-icon { font-size: 1.3rem; }

.audio-bars {
  display: none;
  align-items: flex-end;
  gap: 2px;
  height: 18px;
}

.audio-bars.playing { display: flex; }
.audio-btn .audio-icon.hidden { display: none; }

.audio-bars span {
  width: 3px;
  background: var(--accent-1);
  border-radius: 2px;
  animation: audioBar 0.8s ease-in-out infinite alternate;
}
.audio-bars span:nth-child(1) { height: 6px; animation-delay: 0s; }
.audio-bars span:nth-child(2) { height: 14px; animation-delay: 0.15s; }
.audio-bars span:nth-child(3) { height: 10px; animation-delay: 0.3s; }
.audio-bars span:nth-child(4) { height: 16px; animation-delay: 0.45s; }

@keyframes audioBar {
  0% { transform: scaleY(0.4); }
  100% { transform: scaleY(1); }
}

/* ---------- Navigation ---------- */
.navbar {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 1000;
  padding: 0 2rem;
  height: 64px;
  display: flex; align-items: center; justify-content: space-between;
  background: rgba(6, 6, 15, 0.75);
  backdrop-filter: blur(var(--glass-blur));
  border-bottom: 1px solid var(--border-glass);
  transition: var(--transition);
}

.navbar.scrolled {
  background: rgba(6, 6, 15, 0.92);
  box-shadow: 0 2px 20px rgba(0,0,0,0.4);
}

.nav-logo {
  font-weight: 900; font-size: 1.25rem;
  background: var(--gradient-hero);
  -webkit-background-clip: text; -webkit-text-fill-color: transparent;
  background-clip: text; letter-spacing: 0.05em;
}

.nav-links { display: flex; gap: 0.15rem; list-style: none; }

.nav-links a {
  font-size: 0.82rem; font-weight: 500;
  color: var(--text-secondary); text-decoration: none;
  padding: 0.35rem 0.75rem; border-radius: var(--radius-sm);
  transition: var(--transition);
}
.nav-links a:hover, .nav-links a.active { color: var(--text-primary); background: var(--bg-glass); }

.nav-hamburger { display: none; flex-direction: column; gap: 5px; cursor: pointer; padding: 6px; }
.nav-hamburger span { width: 24px; height: 2px; background: var(--text-primary); border-radius: 2px; transition: var(--transition); }

/* ---------- Section Shared ---------- */
section {
  min-height: 100vh; padding: 7rem 2rem 4rem;
  display: flex; flex-direction: column; align-items: center; justify-content: center;
  position: relative;
}

.section-badge {
  display: inline-flex; align-items: center; gap: 0.5rem;
  font-size: 0.8rem; font-weight: 600; color: var(--accent-2);
  background: rgba(0, 212, 255, 0.08); border: 1px solid rgba(0, 212, 255, 0.2);
  padding: 0.35rem 1rem; border-radius: 100px;
  margin-bottom: 1.5rem; letter-spacing: 0.08em; text-transform: uppercase;
}

.section-title {
  font-size: clamp(2rem, 5vw, 3.2rem); font-weight: 800;
  text-align: center; margin-bottom: 1rem; line-height: 1.3;
}

.section-subtitle {
  font-size: 1.05rem; color: var(--text-secondary);
  text-align: center; max-width: 680px; margin-bottom: 3rem; line-height: 1.8;
}

/* ---------- Animations ---------- */
.animate-in {
  opacity: 0; transform: translateY(40px);
  transition: opacity 0.7s cubic-bezier(0.4, 0, 0.2, 1), transform 0.7s cubic-bezier(0.4, 0, 0.2, 1);
}
.animate-in.visible { opacity: 1; transform: translateY(0); }
.animate-in.delay-1 { transition-delay: 0.1s; }
.animate-in.delay-2 { transition-delay: 0.2s; }
.animate-in.delay-3 { transition-delay: 0.3s; }
.animate-in.delay-4 { transition-delay: 0.4s; }
.animate-in.delay-5 { transition-delay: 0.5s; }

/* ---------- 1. HERO ---------- */
#hero { min-height: 100vh; padding-top: 0; background: var(--bg-deep); overflow: hidden; }

#hero-canvas { position: absolute; inset: 0; z-index: 0; }

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

.hero-trust-badge {
  display: inline-flex; align-items: center; gap: 0.6rem;
  font-size: 0.82rem; font-weight: 500; color: var(--accent-5);
  background: rgba(74, 222, 128, 0.06);
  border: 1px solid rgba(74, 222, 128, 0.15);
  padding: 0.4rem 1.2rem; border-radius: 100px;
  margin-bottom: 2rem;
}

.trust-dot {
  width: 8px; height: 8px; border-radius: 50%;
  background: var(--accent-5);
  animation: pulse-dot 2s ease-in-out infinite;
}

@keyframes pulse-dot {
  0%, 100% { box-shadow: 0 0 0 0 rgba(74,222,128,0.4); }
  50% { box-shadow: 0 0 0 8px rgba(74,222,128,0); }
}

.hero-title {
  font-size: clamp(3.5rem, 10vw, 7rem); font-weight: 900;
  background: var(--gradient-hero);
  -webkit-background-clip: text; -webkit-text-fill-color: transparent;
  background-clip: text; background-size: 200% auto;
  animation: shimmer 4s ease-in-out infinite;
  margin-bottom: 1rem; letter-spacing: 0.02em;
}

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

.hero-tagline {
  font-size: clamp(1.1rem, 2.5vw, 1.5rem); font-weight: 500;
  color: var(--text-secondary); margin-bottom: 1.5rem;
}

.hero-formula {
  display: inline-flex; align-items: center; gap: 0.6rem;
  font-family: var(--ff-en); font-size: clamp(0.9rem, 2vw, 1.1rem); font-weight: 500;
  color: var(--text-secondary);
  background: var(--bg-glass); backdrop-filter: blur(var(--glass-blur));
  border: 1px solid var(--border-glass);
  padding: 0.7rem 1.6rem; border-radius: 100px;
  margin-bottom: 1.5rem; flex-wrap: wrap; justify-content: center;
}
.hero-formula .op { color: var(--accent-1); font-weight: 700; }
.hero-formula .term { color: var(--text-primary); }

.hero-desc {
  font-size: 1.05rem; color: var(--text-secondary);
  max-width: 600px; margin: 0 auto 2.5rem; line-height: 1.9;
}
.hero-desc strong { color: var(--text-primary); }

.hero-stats {
  display: flex; align-items: center; gap: 2rem;
  background: var(--bg-card); backdrop-filter: blur(var(--glass-blur));
  border: 1px solid var(--border-glass); border-radius: var(--radius-lg);
  padding: 1.5rem 2.5rem; justify-content: center;
}

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

.hero-stat-num {
  font-family: var(--ff-en); font-size: 2.5rem; font-weight: 800;
  background: var(--gradient-hero);
  -webkit-background-clip: text; -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero-stat-unit { font-size: 1.2rem; font-weight: 600; color: var(--text-primary); margin-left: 0.15rem; }
.hero-stat-label { display: block; font-size: 0.8rem; color: var(--text-muted); margin-top: 0.2rem; }
.hero-stat-divider { width: 1px; height: 40px; background: var(--border-glass); }

.hero-scroll-hint {
  position: absolute; bottom: 2.5rem; left: 50%; transform: translateX(-50%);
  display: flex; flex-direction: column; align-items: center; gap: 0.5rem;
  color: var(--text-muted); font-size: 0.75rem; letter-spacing: 0.15em;
  animation: bounce 2s ease-in-out infinite;
}
.hero-scroll-hint .arrow { width: 20px; height: 20px; border-right: 2px solid var(--text-muted); border-bottom: 2px solid var(--text-muted); transform: rotate(45deg); }
@keyframes bounce { 0%, 100% { transform: translateX(-50%) translateY(0); } 50% { transform: translateX(-50%) translateY(8px); } }

@keyframes float { 0%, 100% { transform: translateY(0); } 50% { transform: translateY(-12px); } }

/* ---------- 2. CONCEPT ---------- */
#concept { background: var(--bg-primary); }

.concept-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 1.5rem; max-width: 1100px; width: 100%; }

.concept-card {
  background: var(--bg-card); backdrop-filter: blur(var(--glass-blur));
  border: 1px solid var(--border-glass); border-radius: var(--radius-lg);
  padding: 2.5rem 2rem; transition: var(--transition); position: relative; overflow: hidden;
}
.concept-card::before {
  content: ''; position: absolute; top: 0; left: 0; right: 0; height: 3px;
  background: var(--gradient-hero); opacity: 0; transition: var(--transition);
}
.concept-card:hover { transform: translateY(-6px); border-color: var(--border-glow); box-shadow: var(--shadow-glow); }
.concept-card:hover::before { opacity: 1; }

.concept-icon { font-size: 2.5rem; margin-bottom: 1.2rem; display: block; }
.concept-card h3 { font-size: 1.25rem; font-weight: 700; margin-bottom: 0.8rem; }
.concept-card p { font-size: 0.95rem; color: var(--text-secondary); line-height: 1.8; }

.concept-tag {
  display: inline-block; margin-top: 1.2rem;
  font-size: 0.75rem; font-weight: 600; letter-spacing: 0.1em;
  color: var(--accent-2); background: rgba(0, 212, 255, 0.06);
  border: 1px solid rgba(0, 212, 255, 0.15);
  padding: 0.3rem 0.8rem; border-radius: 100px;
}

/* ---------- 3. CELEBRITIES ---------- */
#celebrities { background: var(--bg-deep); padding-bottom: 5rem; }

.celeb-carousel {
  display: flex; gap: 1.5rem; max-width: 1200px; width: 100%;
  overflow: hidden; position: relative;
  scroll-snap-type: x mandatory;
}

.celeb-card {
  min-width: 100%; max-width: 100%;
  background: var(--bg-card); backdrop-filter: blur(var(--glass-blur));
  border: 1px solid var(--border-glass); border-radius: var(--radius-lg);
  padding: 2.5rem; scroll-snap-align: center;
  transition: var(--transition);
}

.celeb-header { display: flex; align-items: center; gap: 1rem; margin-bottom: 1.5rem; }

.celeb-avatar {
  width: 56px; height: 56px; border-radius: 50%;
  background: var(--gradient-card); border: 1px solid var(--border-glass);
  display: flex; align-items: center; justify-content: center;
  font-size: 1.6rem; flex-shrink: 0;
}

.celeb-info h3 { font-size: 1.3rem; font-weight: 700; line-height: 1.3; }
.celeb-role { font-size: 0.82rem; color: var(--text-muted); }

.celeb-year {
  margin-left: auto; font-family: var(--ff-en); font-size: 1.8rem; font-weight: 800;
  background: var(--gradient-hero);
  -webkit-background-clip: text; -webkit-text-fill-color: transparent;
  background-clip: text; opacity: 0.3;
}

.celeb-quote {
  font-size: 1.05rem; font-style: italic; color: var(--text-secondary);
  border: none; margin: 0 0 1.8rem; padding: 1.2rem 1.5rem;
  background: rgba(124, 92, 252, 0.04);
  border-left: 3px solid var(--accent-1); border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
  line-height: 1.8;
}

.celeb-timeline { display: flex; flex-direction: column; gap: 1rem; margin-bottom: 1.5rem; }

.celeb-event {
  display: flex; align-items: flex-start; gap: 0.8rem;
  font-size: 0.92rem; color: var(--text-secondary); line-height: 1.6;
}

.celeb-event-dot {
  width: 12px; height: 12px; border-radius: 50%; flex-shrink: 0; margin-top: 0.3rem;
}

.celeb-event.danger .celeb-event-dot { background: var(--accent-3); box-shadow: 0 0 8px rgba(255,107,157,0.3); }
.celeb-event.action .celeb-event-dot { background: var(--accent-4); box-shadow: 0 0 8px rgba(255,217,61,0.3); }
.celeb-event.success .celeb-event-dot { background: var(--accent-5); box-shadow: 0 0 8px rgba(74,222,128,0.3); }

.celeb-event strong { color: var(--text-primary); }

.celeb-lesson {
  display: flex; align-items: flex-start; gap: 0.7rem;
  background: var(--gradient-trust); border: 1px solid rgba(74, 222, 128, 0.12);
  border-radius: var(--radius-md); padding: 1rem 1.3rem;
  font-size: 0.9rem; color: var(--text-secondary); line-height: 1.7;
}
.celeb-lesson-icon { font-size: 1.2rem; flex-shrink: 0; margin-top: 0.1rem; }
.celeb-lesson strong { color: var(--accent-5); }

.celeb-nav {
  display: flex; align-items: center; gap: 1rem; margin-top: 2rem;
}

.celeb-nav-btn {
  width: 44px; height: 44px; border-radius: 50%;
  background: var(--bg-glass); border: 1px solid var(--border-glass);
  color: var(--text-primary); font-size: 1.4rem;
  cursor: pointer; transition: var(--transition);
  display: flex; align-items: center; justify-content: center;
}
.celeb-nav-btn:hover { background: var(--accent-1); border-color: var(--accent-1); box-shadow: 0 0 20px rgba(124,92,252,0.4); }

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

.celeb-dot {
  width: 10px; height: 10px; border-radius: 50%;
  background: var(--bg-glass); border: 1px solid var(--border-glass);
  cursor: pointer; transition: var(--transition);
}
.celeb-dot.active { background: var(--accent-1); border-color: var(--accent-1); box-shadow: 0 0 10px rgba(124,92,252,0.4); transform: scale(1.2); }

.celeb-summary {
  max-width: 800px; width: 100%; margin-top: 2.5rem;
}

.celeb-summary-inner {
  display: flex; align-items: flex-start; gap: 1rem;
  background: var(--gradient-card); border: 1px solid var(--border-glass);
  border-radius: var(--radius-lg); padding: 2rem 2.5rem;
}
.celeb-summary-icon { font-size: 2rem; flex-shrink: 0; }
.celeb-summary-inner p { font-size: 1.05rem; color: var(--text-secondary); line-height: 1.9; }
.celeb-summary-inner strong { color: var(--text-primary); }

/* ---------- 4. CATEGORIES ---------- */
#categories { background: var(--bg-primary); }

.tab-nav { display: flex; gap: 0.5rem; margin-bottom: 2.5rem; flex-wrap: wrap; justify-content: center; }

.tab-btn {
  font-family: var(--ff-cn); font-size: 0.9rem; font-weight: 600;
  color: var(--text-secondary); background: var(--bg-card);
  border: 1px solid var(--border-glass);
  padding: 0.65rem 1.5rem; border-radius: 100px;
  cursor: pointer; transition: var(--transition);
  display: flex; align-items: center; gap: 0.4rem;
}
.tab-btn:hover { color: var(--text-primary); background: var(--bg-glass); }
.tab-btn.active { color: #fff; background: var(--accent-1); border-color: var(--accent-1); box-shadow: 0 4px 20px rgba(124,92,252,0.35); }

.tab-panels { max-width: 800px; width: 100%; }

.tab-panel {
  display: none; background: var(--bg-card);
  backdrop-filter: blur(var(--glass-blur)); border: 1px solid var(--border-glass);
  border-radius: var(--radius-lg); padding: 3rem; animation: fadeIn 0.4s ease;
}
.tab-panel.active { display: block; }
@keyframes fadeIn { from { opacity: 0; transform: translateY(12px); } to { opacity: 1; transform: translateY(0); } }

.tab-panel-icon { font-size: 3rem; margin-bottom: 1.2rem; display: block; }
.tab-panel h3 { font-size: 1.5rem; font-weight: 700; margin-bottom: 1rem; }
.tab-panel .desc { font-size: 1rem; color: var(--text-secondary); line-height: 1.9; margin-bottom: 1.5rem; }

.case-study {
  background: rgba(124,92,252,0.06); border-left: 3px solid var(--accent-1);
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0; padding: 1.2rem 1.5rem;
}
.case-study .label { font-size: 0.75rem; font-weight: 700; color: var(--accent-1); text-transform: uppercase; letter-spacing: 0.12em; margin-bottom: 0.4rem; }
.case-study p { font-size: 0.92rem; color: var(--text-secondary); line-height: 1.7; }

/* ---------- 5. METRICS ---------- */
#metrics { background: var(--bg-deep); }

.metrics-container { max-width: 950px; width: 100%; }

.metrics-table { width: 100%; border-collapse: separate; border-spacing: 0 0.75rem; }
.metrics-table thead th { font-size: 0.8rem; font-weight: 600; color: var(--text-muted); text-transform: uppercase; letter-spacing: 0.1em; text-align: left; padding: 0 1.5rem 0.5rem; }
.metrics-table tbody tr { background: var(--bg-card); border-radius: var(--radius-md); transition: var(--transition); }
.metrics-table tbody tr:hover { background: var(--bg-glass); transform: scale(1.01); }
.metrics-table td { padding: 1.3rem 1.5rem; vertical-align: middle; }
.metrics-table td:first-child { border-radius: var(--radius-md) 0 0 var(--radius-md); font-weight: 700; white-space: nowrap; }
.metrics-table td:last-child { border-radius: 0 var(--radius-md) var(--radius-md) 0; }

.metric-name { display: flex; align-items: center; gap: 0.7rem; }
.metric-name .dot { width: 10px; height: 10px; border-radius: 50%; flex-shrink: 0; }
.metric-desc { color: var(--text-secondary); font-size: 0.9rem; }
.metric-example { font-size: 0.82rem; color: var(--text-muted); font-style: italic; }

.metric-bar { height: 6px; background: rgba(255,255,255,0.06); border-radius: 100px; overflow: hidden; margin-top: 0.4rem; }
.metric-bar-fill { height: 100%; border-radius: 100px; width: 0; transition: width 1.2s cubic-bezier(0.4, 0, 0.2, 1); }
.metric-bar-fill.bar-1 { background: var(--accent-1); }
.metric-bar-fill.bar-2 { background: var(--accent-2); }
.metric-bar-fill.bar-3 { background: var(--accent-5); }
.metric-bar-fill.bar-4 { background: var(--accent-4); }

/* ---------- 6. RELATIONSHIP ---------- */
#relationship { background: var(--bg-primary); }

.rel-container { max-width: 900px; width: 100%; }
.rel-comparison { display: grid; grid-template-columns: 1fr auto 1fr; gap: 2rem; align-items: center; }

.rel-card {
  background: var(--bg-card); backdrop-filter: blur(var(--glass-blur));
  border: 1px solid var(--border-glass); border-radius: var(--radius-lg);
  padding: 2.5rem 2rem; text-align: center; transition: var(--transition);
}
.rel-card:hover { border-color: var(--border-glow); box-shadow: var(--shadow-glow); }
.rel-card-icon { font-size: 3rem; margin-bottom: 1rem; display: block; }
.rel-card h3 { font-size: 1.4rem; font-weight: 700; margin-bottom: 0.8rem; }
.rel-card p { font-size: 0.92rem; color: var(--text-secondary); line-height: 1.8; }

.rel-card .highlight { display: inline-block; margin-top: 1rem; font-size: 0.82rem; font-weight: 600; padding: 0.4rem 1rem; border-radius: 100px; }
.rel-card:first-child .highlight { color: var(--accent-2); background: rgba(0,212,255,0.1); border: 1px solid rgba(0,212,255,0.2); }
.rel-card:last-child .highlight { color: var(--accent-3); background: rgba(255,107,157,0.1); border: 1px solid rgba(255,107,157,0.2); }

.rel-vs { display: flex; flex-direction: column; align-items: center; gap: 1rem; }
.rel-vs-circle { width: 60px; height: 60px; border-radius: 50%; background: var(--gradient-hero); display: flex; align-items: center; justify-content: center; font-weight: 800; font-size: 0.9rem; box-shadow: 0 0 30px rgba(124,92,252,0.4); }
.rel-vs-line { width: 2px; height: 40px; background: linear-gradient(to bottom, var(--accent-1), transparent); }

.rel-conclusion { margin-top: 3rem; max-width: 800px; background: var(--gradient-card); border: 1px solid var(--border-glass); border-radius: var(--radius-lg); padding: 2rem 2.5rem; text-align: center; }
.rel-conclusion p { font-size: 1.05rem; color: var(--text-secondary); line-height: 1.9; }
.rel-conclusion strong { color: var(--text-primary); }

/* ---------- 7. METHODS ---------- */
#methods { background: var(--bg-deep); }

.methods-timeline { max-width: 700px; width: 100%; position: relative; padding-left: 3rem; }
.methods-timeline::before { content: ''; position: absolute; top: 0; left: 14px; bottom: 0; width: 2px; background: linear-gradient(to bottom, var(--accent-1), var(--accent-2), var(--accent-5)); border-radius: 100px; }

.method-item { position: relative; margin-bottom: 2.5rem; }
.method-item:last-child { margin-bottom: 0; }

.method-dot { position: absolute; left: -3rem; top: 0.3rem; width: 30px; height: 30px; border-radius: 50%; display: flex; align-items: center; justify-content: center; font-size: 0.85rem; font-weight: 700; color: #fff; z-index: 1; box-shadow: 0 0 16px rgba(124,92,252,0.3); }
.method-dot.d1 { background: var(--accent-1); }
.method-dot.d2 { background: var(--accent-2); }
.method-dot.d3 { background: var(--accent-3); }
.method-dot.d4 { background: var(--accent-5); }
.method-dot.d5 { background: var(--accent-4); }

.method-content { background: var(--bg-card); border: 1px solid var(--border-glass); border-radius: var(--radius-md); padding: 1.5rem 2rem; transition: var(--transition); }
.method-content:hover { border-color: var(--border-glow); box-shadow: var(--shadow-glow); transform: translateX(6px); }
.method-content h3 { font-size: 1.1rem; font-weight: 700; margin-bottom: 0.5rem; display: flex; align-items: center; gap: 0.5rem; }
.method-content p { font-size: 0.92rem; color: var(--text-secondary); line-height: 1.8; }

/* ---------- 8. SUMMARY ---------- */
#summary { background: var(--bg-primary); position: relative; overflow: hidden; }

#summary::before { content: ''; position: absolute; inset: 0; background: radial-gradient(ellipse at center, rgba(124,92,252,0.08) 0%, transparent 70%); pointer-events: none; }

.summary-content { position: relative; z-index: 1; text-align: center; max-width: 800px; }
.summary-emoji { font-size: 4.5rem; margin-bottom: 2rem; display: block; animation: float 3.5s ease-in-out infinite; }

.summary-quote { font-size: clamp(1.2rem, 3vw, 1.7rem); font-weight: 600; line-height: 1.9; margin-bottom: 2rem; }
.summary-sub { font-size: 1rem; color: var(--text-secondary); line-height: 1.9; max-width: 600px; margin: 0 auto 3rem; }

.summary-wisdom { display: grid; grid-template-columns: repeat(3, 1fr); gap: 1.2rem; margin-bottom: 3rem; }

.wisdom-card {
  background: var(--bg-card); border: 1px solid var(--border-glass);
  border-radius: var(--radius-md); padding: 1.5rem; text-align: center;
  transition: var(--transition);
}
.wisdom-card:hover { border-color: var(--border-glow); box-shadow: var(--shadow-glow); transform: translateY(-4px); }

.wisdom-icon { font-size: 1.5rem; display: block; margin-bottom: 0.8rem; }
.wisdom-card p { font-size: 0.95rem; color: var(--text-primary); font-weight: 500; margin-bottom: 0.5rem; line-height: 1.6; }
.wisdom-source { font-size: 0.78rem; color: var(--text-muted); }

.summary-cta {
  display: inline-flex; align-items: center; gap: 0.5rem;
  font-family: var(--ff-cn); font-size: 1rem; font-weight: 600; color: #fff;
  background: var(--gradient-hero); background-size: 200% auto;
  border: none; border-radius: 100px;
  padding: 0.9rem 2.5rem; cursor: pointer; transition: var(--transition);
  text-decoration: none;
}
.summary-cta:hover { background-position: 100% center; box-shadow: 0 8px 30px rgba(124,92,252,0.4); transform: translateY(-2px); }

/* ---------- Footer ---------- */
.footer { background: var(--bg-deep); border-top: 1px solid var(--border-glass); padding: 2rem; text-align: center; font-size: 0.8rem; color: var(--text-muted); }

/* ---------- Responsive ---------- */
@media (max-width: 768px) {
  .nav-links { display: none; }
  .nav-hamburger { display: flex; }
  .nav-links.open { display: flex; flex-direction: column; position: absolute; top: 64px; left: 0; right: 0; background: rgba(6,6,15,0.95); backdrop-filter: blur(var(--glass-blur)); padding: 1rem; border-bottom: 1px solid var(--border-glass); }

  section { padding: 5rem 1.2rem 3rem; }
  .concept-grid { grid-template-columns: 1fr; }
  .rel-comparison { grid-template-columns: 1fr; gap: 1.5rem; }
  .rel-vs { flex-direction: row; }
  .rel-vs-line { width: 40px; height: 2px; background: linear-gradient(to right, var(--accent-1), transparent); }
  .methods-timeline { padding-left: 2.5rem; }
  .method-dot { left: -2.5rem; width: 26px; height: 26px; font-size: 0.75rem; }
  .tab-panel { padding: 2rem 1.5rem; }

  .hero-stats { flex-direction: column; gap: 1rem; padding: 1.2rem 1.5rem; }
  .hero-stat-divider { width: 40px; height: 1px; }

  .celeb-card { padding: 1.8rem; }
  .celeb-header { flex-wrap: wrap; }
  .celeb-year { font-size: 1.3rem; }

  .summary-wisdom { grid-template-columns: 1fr; }

  .metrics-table thead { display: none; }
  .metrics-table tbody tr { display: flex; flex-direction: column; padding: 1.2rem; border-radius: var(--radius-md); margin-bottom: 0.75rem; }
  .metrics-table td { padding: 0.4rem 0; border-radius: 0 !important; }
}

@media (max-width: 480px) {
  .hero-title { font-size: 3rem; }
  .hero-formula { font-size: 0.82rem; padding: 0.6rem 1.2rem; }
}