/* ==========================================================================
   Design Tokens: Blue, White & Frosted Glass with Seamless Theme Toggle
   ========================================================================== */
:root {
  --font-serif: -apple-system, BlinkMacSystemFont, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", serif;
  --font-sans: -apple-system, BlinkMacSystemFont, "SF Pro Text", "Segoe UI", Roboto, sans-serif;
  --ease: cubic-bezier(0.16, 1, 0.3, 1);
  --ease-in-out: cubic-bezier(0.65, 0, 0.35, 1);
}

/* Light Mode: Airy Light Blue & Pure White with Frosted Glass */
[data-theme="light"] {
  --bg-base: #f0f5fa;
  --bg-gradient: radial-gradient(circle at 65% 15%, #e1effa 0%, #edf4fa 45%, #f4f8fc 100%);
  --ink-primary: #0c1b2a;
  --ink-secondary: #4a637a;
  --ink-tertiary: #7d96ae;
  --accent-blue: #0071e3;
  --accent-glow: rgba(0, 113, 227, 0.22);
  --accent-soft: #e5f1fc;
  
  --glass-surface: rgba(255, 255, 255, 0.65);
  --glass-surface-heavy: rgba(255, 255, 255, 0.85);
  --glass-border: rgba(255, 255, 255, 0.75);
  --glass-border-subtle: rgba(12, 27, 42, 0.08);
  --glass-shadow: 0 16px 40px rgba(12, 38, 64, 0.06);
  --glass-shadow-lg: 0 24px 60px rgba(12, 38, 64, 0.1);
  
  --line: rgba(12, 27, 42, 0.1);
  --card-hover: rgba(255, 255, 255, 0.88);
  --halo-color: #c9e3fa;
  --ring-focus: #0071e3;
}

/* Dark Mode: Deep Midnight Blue & Charcoal with Frosted Glass */
[data-theme="dark"] {
  --bg-base: #080e17;
  --bg-gradient: radial-gradient(circle at 65% 15%, #102133 0%, #0c1724 50%, #070d14 100%);
  --ink-primary: #f2f7fc;
  --ink-secondary: #9cb3c9;
  --ink-tertiary: #5d748a;
  --accent-blue: #38bdf8;
  --accent-glow: rgba(56, 189, 248, 0.3);
  --accent-soft: rgba(56, 189, 248, 0.12);
  
  --glass-surface: rgba(14, 25, 38, 0.62);
  --glass-surface-heavy: rgba(18, 32, 48, 0.85);
  --glass-border: rgba(255, 255, 255, 0.12);
  --glass-border-subtle: rgba(255, 255, 255, 0.06);
  --glass-shadow: 0 16px 45px rgba(0, 0, 0, 0.45);
  --glass-shadow-lg: 0 30px 80px rgba(0, 0, 0, 0.65);
  
  --line: rgba(255, 255, 255, 0.1);
  --card-hover: rgba(24, 42, 64, 0.75);
  --halo-color: #1a3a5a;
  --ring-focus: #38bdf8;
}

/* Global Reset & Base */
*, *:before, *:after { box-sizing: border-box; }
html {
  scroll-padding-top: 80px;
  background-color: var(--bg-base);
  color: var(--ink-primary);
  transition: background-color 0.65s var(--ease), color 0.5s var(--ease);
}
body {
  margin: 0;
  font-family: var(--font-sans);
  background-color: var(--bg-base);
  color: var(--ink-primary);
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
  min-height: 100vh;
  position: relative;
}

/* Dual-Layer Ambient Crossfade for 60fps Silky Theme Transitions */
.ambient-bg {
  position: fixed;
  inset: 0;
  z-index: -2;
  pointer-events: none;
  background-attachment: fixed;
  transition: opacity 0.65s var(--ease);
  will-change: opacity;
}
.ambient-bg-light {
  background: radial-gradient(circle at 65% 15%, #e1effa 0%, #edf4fa 45%, #f4f8fc 100%);
  opacity: 1;
}
.ambient-bg-dark {
  background: radial-gradient(circle at 65% 15%, #102133 0%, #0c1724 50%, #070d14 100%);
  opacity: 0;
}
[data-theme="dark"] .ambient-bg-light { opacity: 0; }
[data-theme="dark"] .ambient-bg-dark { opacity: 1; }

/* Coordinated Component Transitions */
.site-header,
.brand-title,
.brand-tag,
.nav-links a,
.btn-glass,
.btn-primary-glow,
.theme-toggle-btn,
.build-badge,
.prologue-title,
.prologue-desc,
.narrative-act,
.act-title,
.act-desc,
.chapter-nav,
.chapter-dot-btn,
.path-card,
.path-card-title,
.path-card-desc,
.path-card-status,
.callout-box,
.callout-quote,
.callout-sub,
.roadmap-item,
.roadmap-name,
.roadmap-badge,
.site-footer,
dialog,
.dialog-content,
.crystal-plate {
  transition: background-color 0.6s var(--ease),
              border-color 0.6s var(--ease),
              color 0.5s var(--ease),
              box-shadow 0.6s var(--ease),
              backdrop-filter 0.6s var(--ease);
}
button, a { font: inherit; color: inherit; }
button { cursor: pointer; border: none; background: none; }
a { text-decoration: none; }
button:focus-visible, a:focus-visible {
  outline: 2px solid var(--ring-focus);
  outline-offset: 4px;
}

/* Accessible Skip Link */
.skip-link {
  position: fixed;
  top: -80px;
  left: 20px;
  z-index: 1000;
  background: var(--ink-primary);
  color: var(--bg-base);
  padding: 12px 18px;
  border-radius: 8px;
  font-size: 13px;
  font-weight: 500;
  transition: top 0.2s var(--ease);
}
.skip-link:focus { top: 20px; }

/* ==========================================================================
   Header: Frosted Glass Floating Navigation
   ========================================================================== */
.site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: 72px;
  z-index: 100;
  padding: 0 clamp(20px, 5vw, 64px);
  display: flex;
  align-items: center;
  justify-content: space-between;
  border-bottom: 1px solid transparent;
  transition: background 0.3s var(--ease), border-color 0.3s var(--ease), box-shadow 0.3s var(--ease);
}
.site-header.is-scrolled {
  background: var(--glass-surface);
  backdrop-filter: blur(24px) saturate(160%);
  -webkit-backdrop-filter: blur(24px) saturate(160%);
  border-color: var(--glass-border);
  box-shadow: var(--glass-shadow);
}
.brand-group {
  display: flex;
  align-items: center;
  gap: 12px;
}
.brand-title {
  font-size: 20px;
  font-weight: 700;
  letter-spacing: 0.15em;
  color: var(--ink-primary);
}
.brand-tag {
  font-size: 9px;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--ink-tertiary);
  padding: 2px 8px;
  border-radius: 999px;
  background: var(--accent-soft);
  border: 1px solid var(--line);
}
.nav-actions {
  display: flex;
  align-items: center;
  gap: clamp(12px, 2.5vw, 24px);
}
.nav-links {
  display: flex;
  align-items: center;
  gap: 24px;
  font-size: 13px;
  font-weight: 500;
}
.nav-links a {
  color: var(--ink-secondary);
  transition: color 0.2s var(--ease);
}
.nav-links a:hover { color: var(--ink-primary); }

/* Frosted Glass Buttons */
.btn-glass {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 9px 18px;
  min-height: 42px;
  font-size: 13px;
  font-weight: 500;
  color: var(--ink-primary);
  background: var(--glass-surface);
  border: 1px solid var(--glass-border);
  border-radius: 999px;
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  box-shadow: var(--glass-shadow);
  transition: transform 0.25s var(--ease), background 0.25s var(--ease), border-color 0.25s var(--ease), box-shadow 0.25s var(--ease);
}
.btn-glass:hover {
  transform: translateY(-2px);
  background: var(--card-hover);
  border-color: var(--accent-blue);
  box-shadow: 0 12px 30px var(--accent-glow);
}
.btn-glass:active { transform: translateY(0); }

/* Theme Toggle Button with Rotating Sun/Moon Morph */
.theme-toggle-btn {
  position: relative;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 42px;
  height: 42px;
  border-radius: 50%;
  background: var(--glass-surface);
  border: 1px solid var(--glass-border);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  color: var(--ink-primary);
  box-shadow: var(--glass-shadow);
  transition: transform 0.25s var(--ease), background-color 0.5s var(--ease), border-color 0.5s var(--ease), color 0.5s var(--ease);
}
.theme-toggle-btn:hover {
  transform: scale(1.08);
  border-color: var(--accent-blue);
}
.theme-toggle-btn svg {
  position: absolute;
  width: 18px;
  height: 18px;
  fill: none;
  stroke: currentColor;
  stroke-width: 2;
  stroke-linecap: round;
  stroke-linejoin: round;
  transition: transform 0.55s var(--ease), opacity 0.45s ease;
}
[data-theme="light"] .icon-moon {
  opacity: 1;
  transform: rotate(0deg) scale(1);
}
[data-theme="light"] .icon-sun {
  opacity: 0;
  transform: rotate(-90deg) scale(0.6);
  pointer-events: none;
}
[data-theme="dark"] .icon-moon {
  opacity: 0;
  transform: rotate(90deg) scale(0.6);
  pointer-events: none;
}
[data-theme="dark"] .icon-sun {
  opacity: 1;
  transform: rotate(0deg) scale(1);
}

/* View Transitions Support */
::view-transition-old(root),
::view-transition-new(root) {
  animation-duration: 0.55s;
  animation-timing-function: cubic-bezier(0.16, 1, 0.3, 1);
}

/* Build Marker Badge */
.build-badge {
  position: fixed;
  bottom: 18px;
  right: 18px;
  z-index: 99;
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 8px 14px;
  border-radius: 999px;
  font-size: 11px;
  font-family: var(--font-sans);
  letter-spacing: 0.05em;
  background: var(--glass-surface-heavy);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border: 1px solid var(--glass-border);
  box-shadow: var(--glass-shadow);
  color: var(--ink-primary);
}
.build-dot {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--accent-blue);
  box-shadow: 0 0 10px var(--accent-blue);
  animation: pulse-dot 2.5s infinite;
}
@keyframes pulse-dot {
  0%, 100% { opacity: 1; transform: scale(1); }
  50% { opacity: 0.5; transform: scale(0.85); }
}

/* ==========================================================================
   Hero Stage: 4-Act Cinematic Presentation
   ========================================================================== */
.hero-experience {
  position: relative;
  min-height: 84vh;
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
  padding: 130px 24px 70px;
}

/* Atmospheric Visual Background */
.halo-sphere {
  position: absolute;
  width: min(60vw, 700px);
  height: min(60vw, 700px);
  border-radius: 50%;
  background: radial-gradient(circle at center, var(--accent-glow) 0%, rgba(56, 189, 248, 0.08) 35%, transparent 70%);
  pointer-events: none;
  will-change: transform, opacity;
  transform: translateZ(0);
}
.crystal-world {
  position: absolute;
  width: min(880px, 92vw);
  height: min(580px, 68vh);
  pointer-events: none;
  transform-style: preserve-3d;
  will-change: transform, opacity;
}
.crystal-plate {
  position: absolute;
  inset: 12% 8%;
  border-radius: 40px;
  background: var(--glass-surface);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  border: 1px solid var(--glass-border);
  box-shadow: var(--glass-shadow-lg);
  transform: rotateX(54deg) rotateZ(-26deg) translateZ(0);
  transition: background 0.4s var(--ease), border-color 0.4s var(--ease);
}
.crystal-river {
  position: absolute;
  top: -10%;
  left: 45%;
  width: 14%;
  height: 120%;
  background: linear-gradient(180deg, var(--accent-blue) 0%, #38bdf8 50%, var(--accent-soft) 100%);
  border-radius: 999px;
  opacity: 0.55;
  box-shadow: 0 0 24px var(--accent-glow);
}
.crystal-bridge {
  position: absolute;
  top: 42%;
  left: 32%;
  width: 40%;
  height: 18%;
  border-radius: 20px 20px 0 0;
  border: 4px solid var(--glass-border);
  border-bottom: 0;
  background: var(--glass-surface-heavy);
  box-shadow: inset 0 4px 12px var(--accent-glow);
}
.crystal-beacon {
  position: absolute;
  width: 12px;
  height: 12px;
  border-radius: 50%;
  background: var(--accent-blue);
  box-shadow: 0 0 25px var(--accent-blue), 0 0 50px var(--accent-blue);
}
.beacon-1 { top: 28%; left: 62%; }
.beacon-2 { top: 58%; left: 24%; }
.beacon-3 { top: 68%; left: 70%; }

/* Narrative Cards */
.hero-prologue {
  position: absolute;
  z-index: 10;
  max-width: 820px;
  padding: 0 clamp(24px, 5vw, 64px);
  text-align: left;
  will-change: transform, opacity;
}
.prologue-kicker {
  font-size: 12px;
  letter-spacing: 0.25em;
  font-weight: 600;
  color: var(--accent-blue);
  text-transform: uppercase;
  margin-bottom: 24px;
  display: flex;
  align-items: center;
  gap: 12px;
}
.prologue-kicker:before {
  content: "";
  width: 32px;
  height: 2px;
  background: currentColor;
}
.prologue-title {
  font-family: var(--font-serif);
  font-size: clamp(48px, 8.5vw, 108px);
  font-weight: 700;
  line-height: 1.02;
  letter-spacing: -0.04em;
  margin: 0 0 28px 0;
}
.prologue-title em {
  font-style: normal;
  color: var(--accent-blue);
  display: block;
}
.prologue-desc {
  font-size: clamp(15px, 1.8vw, 18px);
  line-height: 1.8;
  color: var(--ink-secondary);
  max-width: 480px;
  margin: 0 0 36px 0;
}
.btn-primary-glow {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  padding: 14px 32px;
  min-height: 48px;
  border-radius: 999px;
  background: var(--accent-blue);
  color: #ffffff;
  font-size: 14px;
  font-weight: 600;
  box-shadow: 0 10px 30px var(--accent-glow);
  transition: transform 0.25s var(--ease), box-shadow 0.25s var(--ease);
}
.btn-primary-glow:hover {
  transform: translateY(-2px);
  box-shadow: 0 16px 45px var(--accent-glow);
}

/* 4 Acts Narrative Layers */
.narrative-act {
  position: absolute;
  z-index: 10;
  width: min(680px, 86vw);
  padding: clamp(28px, 4vw, 42px);
  border-radius: 28px;
  background: var(--glass-surface-heavy);
  backdrop-filter: blur(14px) saturate(140%);
  -webkit-backdrop-filter: blur(14px) saturate(140%);
  border: 1px solid var(--glass-border);
  box-shadow: var(--glass-shadow-lg);
  will-change: transform, opacity;
  transform-origin: center center;
  transform: translateZ(0);
  opacity: 0;
  visibility: hidden;
  pointer-events: none;
  transition: box-shadow 0.3s var(--ease), border-color 0.3s var(--ease);
}
.narrative-act.is-active {
  z-index: 25;
  border-color: var(--accent-blue);
  box-shadow: 0 30px 90px rgba(0, 0, 0, 0.35), 0 0 40px var(--accent-glow);
  pointer-events: auto;
}
.narrative-act.is-peeked {
  cursor: pointer;
  pointer-events: auto;
}
.narrative-act.is-peeked:hover {
  opacity: 0.65 !important;
}
.act-num {
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.2em;
  color: var(--accent-blue);
  text-transform: uppercase;
  margin-bottom: 16px;
  display: flex;
  align-items: center;
  gap: 8px;
}
.act-title {
  font-family: var(--font-serif);
  font-size: clamp(32px, 5vw, 56px);
  font-weight: 700;
  line-height: 1.15;
  letter-spacing: -0.03em;
  margin: 0 0 18px 0;
}
.act-desc {
  font-size: clamp(14px, 1.6vw, 16px);
  line-height: 1.85;
  color: var(--ink-secondary);
  margin: 0;
}
.act-desc strong {
  color: var(--ink-primary);
  font-weight: 600;
}
.act-action {
  margin-top: 24px;
  pointer-events: auto;
}

/* Chapter Progress Bar */
.chapter-nav {
  position: absolute;
  bottom: 28px;
  left: clamp(20px, 5vw, 64px);
  z-index: 20;
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 8px 16px;
  border-radius: 999px;
  background: var(--glass-surface);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border: 1px solid var(--glass-border);
}
.chapter-dot-btn {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 4px;
  font-size: 11px;
  font-weight: 600;
  color: var(--ink-tertiary);
  transition: color 0.2s var(--ease);
}
.chapter-dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--ink-tertiary);
  transition: transform 0.25s var(--ease), background 0.25s var(--ease);
}
.chapter-dot-btn[aria-current="step"] {
  color: var(--accent-blue);
}
.chapter-dot-btn[aria-current="step"] .chapter-dot {
  background: var(--accent-blue);
  transform: scale(1.5);
  box-shadow: 0 0 8px var(--accent-blue);
}

/* ==========================================================================
   Content Sections: Glass Architecture
   ========================================================================== */
.content-wrap {
  position: relative;
  z-index: 10;
  max-width: 1200px;
  margin: 0 auto;
  padding: 80px clamp(20px, 5vw, 64px) 140px;
}

.section-head {
  margin-bottom: 56px;
}
.section-kicker {
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.2em;
  color: var(--accent-blue);
  text-transform: uppercase;
  margin-bottom: 14px;
}
.section-headline {
  font-family: var(--font-serif);
  font-size: clamp(36px, 5.5vw, 64px);
  font-weight: 700;
  line-height: 1.12;
  letter-spacing: -0.03em;
  margin: 0;
}

/* 3 Paths Cards Grid (Frosted Glass) */
.paths-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
  margin-bottom: 96px;
}
.path-card {
  padding: 36px 30px;
  border-radius: 24px;
  background: var(--glass-surface);
  backdrop-filter: blur(24px);
  -webkit-backdrop-filter: blur(24px);
  border: 1px solid var(--glass-border);
  box-shadow: var(--glass-shadow);
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  min-height: 320px;
  transition: transform 0.3s var(--ease), background 0.3s var(--ease), border-color 0.3s var(--ease), box-shadow 0.3s var(--ease);
}
.path-card:hover {
  transform: translateY(-6px);
  background: var(--card-hover);
  border-color: var(--accent-blue);
  box-shadow: 0 20px 45px var(--accent-glow);
}
.path-card-index {
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.15em;
  color: var(--accent-blue);
}
.path-card-title {
  font-family: var(--font-serif);
  font-size: 26px;
  font-weight: 700;
  margin: 16px 0 12px 0;
  letter-spacing: -0.02em;
}
.path-card-desc {
  font-size: 14px;
  line-height: 1.75;
  color: var(--ink-secondary);
  margin: 0;
}
.path-card-status {
  margin-top: 24px;
  padding: 6px 12px;
  border-radius: 999px;
  background: var(--accent-soft);
  color: var(--accent-blue);
  font-size: 11px;
  font-weight: 600;
  display: inline-block;
  align-self: flex-start;
  border: 1px solid var(--line);
}

/* Roadmap Grid */
.roadmap-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 20px;
  margin-bottom: 96px;
}
.roadmap-item {
  padding: 26px 28px;
  border-radius: 20px;
  background: var(--glass-surface);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border: 1px solid var(--glass-border);
  box-shadow: var(--glass-shadow);
  display: flex;
  align-items: center;
  justify-content: space-between;
}
.roadmap-label {
  font-size: 11px;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--accent-blue);
  margin-bottom: 6px;
}
.roadmap-name {
  font-size: 17px;
  font-weight: 600;
  color: var(--ink-primary);
  margin: 0;
}
.roadmap-badge {
  font-size: 11px;
  padding: 4px 10px;
  border-radius: 999px;
  background: var(--accent-soft);
  color: var(--accent-blue);
  border: 1px solid var(--line);
}

/* Philosophy Callout */
.callout-box {
  padding: clamp(40px, 6vw, 64px);
  border-radius: 32px;
  background: var(--glass-surface-heavy);
  backdrop-filter: blur(30px);
  -webkit-backdrop-filter: blur(30px);
  border: 1px solid var(--glass-border);
  box-shadow: var(--glass-shadow-lg);
  text-align: center;
  margin-bottom: 96px;
}
.callout-quote {
  font-family: var(--font-serif);
  font-size: clamp(26px, 4vw, 44px);
  font-weight: 700;
  line-height: 1.25;
  letter-spacing: -0.02em;
  margin: 0 0 24px 0;
}
.callout-quote em {
  font-style: normal;
  color: var(--accent-blue);
}
.callout-sub {
  font-size: 15px;
  color: var(--ink-secondary);
  max-width: 580px;
  margin: 0 auto 32px auto;
  line-height: 1.8;
}

/* Site Footer */
.site-footer {
  border-top: 1px solid var(--line);
  padding: 40px clamp(20px, 5vw, 64px);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  font-size: 12px;
  color: var(--ink-tertiary);
}
.footer-left strong { color: var(--ink-primary); font-weight: 600; }

/* ==========================================================================
   Modals & Dialogs (Apple-style Frosted Glass with Spring Physics)
   ========================================================================== */
dialog {
  width: min(640px, calc(100vw - 32px));
  max-height: 85vh;
  border: 1px solid var(--glass-border);
  border-radius: 28px;
  padding: 0;
  background: var(--glass-surface-heavy);
  backdrop-filter: blur(40px) saturate(180%);
  -webkit-backdrop-filter: blur(40px) saturate(180%);
  color: var(--ink-primary);
  box-shadow: var(--glass-shadow-lg);
  overflow: auto;
  opacity: 0;
  transform: scale(0.95) translateY(18px);
  transition: opacity 0.36s var(--ease),
              transform 0.36s var(--ease),
              overlay 0.36s allow-discrete,
              display 0.36s allow-discrete;
}
dialog[open] {
  opacity: 1;
  transform: scale(1) translateY(0);
}
@starting-style {
  dialog[open] {
    opacity: 0;
    transform: scale(0.95) translateY(18px);
  }
}

/* Graceful Closing Animation */
dialog.is-closing {
  opacity: 0 !important;
  transform: scale(0.96) translateY(12px) !important;
  transition: opacity 0.22s cubic-bezier(0.4, 0, 1, 1), transform 0.22s cubic-bezier(0.4, 0, 1, 1) !important;
}

dialog::backdrop {
  background: rgba(8, 14, 23, 0);
  backdrop-filter: blur(0px);
  -webkit-backdrop-filter: blur(0px);
  transition: background 0.36s var(--ease),
              backdrop-filter 0.36s var(--ease),
              overlay 0.36s allow-discrete,
              display 0.36s allow-discrete;
}
dialog[open]::backdrop {
  background: rgba(8, 14, 23, 0.65);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
}
@starting-style {
  dialog[open]::backdrop {
    background: rgba(8, 14, 23, 0);
    backdrop-filter: blur(0px);
    -webkit-backdrop-filter: blur(0px);
  }
}
dialog.is-closing::backdrop {
  background: rgba(8, 14, 23, 0) !important;
  backdrop-filter: blur(0px) !important;
  -webkit-backdrop-filter: blur(0px) !important;
  transition: background 0.22s var(--ease), backdrop-filter 0.22s var(--ease) !important;
}

.dialog-content {
  padding: clamp(32px, 5vw, 48px);
  position: relative;
}
.btn-dialog-close {
    position: absolute;
    top: 24px;
    right: 24px;
    width: 36px;
    height: 36px;
    padding: 0;
    margin: 0;
    border: none;
    outline: none;
    border-radius: 50%;
    background: var(--accent-soft);
    color: var(--ink-primary);
    display: inline-flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    box-sizing: border-box;
    transition: transform 0.2s var(--ease), background 0.2s var(--ease), color 0.2s var(--ease);
  }
  .btn-dialog-close svg {
    display: block;
    width: 12px;
    height: 12px;
    pointer-events: none;
    shape-rendering: geometricPrecision;
  }
.btn-dialog-close:hover {
  transform: scale(1.1);
  background: var(--accent-blue);
  color: #ffffff;
}
.dialog-kicker {
  font-size: 11px;
  letter-spacing: 0.2em;
  font-weight: 700;
  color: var(--accent-blue);
  text-transform: uppercase;
  margin-bottom: 12px;
}
.dialog-title {
  font-family: var(--font-serif);
  font-size: 28px;
  font-weight: 700;
  letter-spacing: -0.02em;
  margin: 0 0 20px 0;
}
.dialog-body-text {
  font-size: 14px;
  line-height: 1.8;
  color: var(--ink-secondary);
}
.dialog-list {
  padding-left: 20px;
  margin: 18px 0;
}
.dialog-list li {
  margin-bottom: 12px;
  line-height: 1.7;
}
.dialog-list li strong {
  color: var(--ink-primary);
}
.dialog-notice {
  padding: 12px 16px;
  border-radius: 12px;
  background: var(--accent-soft);
  border: 1px solid var(--line);
  color: var(--accent-blue);
  font-size: 12px;
  line-height: 1.6;
  margin-top: 20px;
}

/* ==========================================================================
   Responsive & Accessibility
   ========================================================================== */
@media (max-width: 900px) {
  .paths-grid { grid-template-columns: 1fr; gap: 16px; }
  .roadmap-grid { grid-template-columns: 1fr; gap: 14px; }
  .nav-links { display: none; }
  .hero-prologue { top: 18%; }
  .narrative-act { width: calc(100vw - 40px); }
  .site-footer { flex-direction: column; align-items: flex-start; }
}

@media (prefers-reduced-motion: reduce) {
  /* Keep visual layout fully unified while respecting vestibular comfort by avoiding aggressive spin */
  .crystal-world { transition: none; }
}

/* Navigation Link Buttons */
.nav-link-btn {
  font-size: 13px;
  font-weight: 500;
  color: var(--ink-secondary);
  background: none;
  border: none;
  padding: 6px 0;
  transition: color 0.2s var(--ease);
  cursor: pointer;
}
.nav-link-btn:hover { color: var(--ink-primary); }

.btn-account {
  gap: 8px;
  font-weight: 600;
  border-color: var(--accent-blue);
  background: var(--accent-soft);
  color: var(--accent-blue);
}

/* Modal Tab Navigation System */
.modal-tabs {
  display: flex;
  gap: 6px;
  padding: 4px;
  background: var(--accent-soft);
  border-radius: 14px;
  margin: 16px 0 24px 0;
  border: 1px solid var(--line);
  overflow-x: auto;
}
.tab-btn {
  flex: 1;
  min-width: max-content;
  padding: 8px 14px;
  font-size: 12px;
  font-weight: 600;
  border-radius: 10px;
  color: var(--ink-secondary);
  text-align: center;
  transition: background 0.2s var(--ease), color 0.2s var(--ease), box-shadow 0.2s var(--ease);
  cursor: pointer;
  border: none;
  background: none;
}
.tab-btn.is-active {
  background: var(--glass-surface-heavy);
  color: var(--accent-blue);
  box-shadow: 0 4px 14px rgba(0, 0, 0, 0.08);
}
.tab-pane {
  display: none;
  animation: tab-fade-in 0.25s var(--ease);
}
.tab-pane.is-active {
  display: block;
}
@keyframes tab-fade-in {
  from { opacity: 0; transform: translateY(6px); }
  to { opacity: 1; transform: translateY(0); }
}

/* Form Groups & Inputs */
.form-group {
  margin-bottom: 18px;
}
.form-label {
  display: block;
  font-size: 12px;
  font-weight: 600;
  margin-bottom: 8px;
  color: var(--ink-secondary);
}
.form-input {
  width: 100%;
  padding: 12px 16px;
  border-radius: 14px;
  background: var(--glass-surface);
  border: 1px solid var(--glass-border);
  color: var(--ink-primary);
  font-family: inherit;
  font-size: 14px;
  outline: none;
  transition: border-color 0.2s var(--ease), box-shadow 0.2s var(--ease);
}
.form-input:focus {
  border-color: var(--accent-blue);
  box-shadow: 0 0 0 3px var(--accent-glow);
}
.form-help {
  font-size: 11px;
  color: var(--ink-tertiary);
  margin-top: 6px;
  line-height: 1.5;
}

/* Status Cards & Info Callouts */
.info-card {
  padding: 16px 18px;
  border-radius: 16px;
  background: var(--glass-surface);
  border: 1px solid var(--line);
  margin-bottom: 18px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}
.info-card-left strong {
  display: block;
  font-size: 14px;
  color: var(--ink-primary);
}
.info-card-left span {
  font-size: 12px;
  color: var(--ink-secondary);
}

/* Feature Grid inside Modal */
.table-wrap {
  width: 100%;
  overflow-x: auto;
  border-radius: 14px;
  border: 1px solid var(--line);
  margin-top: 14px;
}
.data-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 12px;
  text-align: left;
}
.data-table th, .data-table td {
  padding: 10px 14px;
  border-bottom: 1px solid var(--line);
}
.data-table th {
  background: var(--accent-soft);
  color: var(--accent-blue);
  font-weight: 600;
}
.data-table tr:last-child td {
  border-bottom: none;
}

/* BlueMap Mockup Frame */
.map-viewport-frame {
  width: 100%;
  height: 380px;
  border-radius: 20px;
  background: radial-gradient(circle at center, #1b354d 0%, #0c1824 100%);
  border: 1px solid var(--glass-border);
  position: relative;
  overflow: hidden;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  color: #ffffff;
  text-align: center;
  box-shadow: var(--glass-shadow-lg);
}
.map-grid-overlay {
  position: absolute;
  inset: 0;
  pointer-events: none;
  background-image: linear-gradient(rgba(56, 189, 248, 0.12) 1px, transparent 1px), linear-gradient(90deg, rgba(56, 189, 248, 0.12) 1px, transparent 1px);
  background-size: 40px 40px;
  mask-image: radial-gradient(circle, black 40%, transparent 80%);
}
.map-compass {
  width: 54px;
  height: 54px;
  border-radius: 50%;
  border: 2px dashed var(--accent-blue);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 14px;
  animation: compass-spin 20s linear infinite;
}
@keyframes compass-spin {
  from { transform: rotate(0deg); }
  to { transform: rotate(360deg); }
}

/* Frosted Glass Slide-To-Verify CAPTCHA */
.captcha-slider-box {
  margin: 18px 0;
  user-select: none;
}
.captcha-slider-track {
  position: relative;
  height: 48px;
  border-radius: 14px;
  background: var(--glass-surface);
  border: 1px solid var(--glass-border);
  box-shadow: var(--glass-shadow);
  overflow: hidden;
  display: flex;
  align-items: center;
  justify-content: center;
  touch-action: none;
}
.captcha-slider-fill {
  position: absolute;
  left: 0;
  top: 0;
  bottom: 0;
  width: 0;
  background: linear-gradient(90deg, var(--accent-soft), rgba(56, 189, 248, 0.28));
  border-radius: 14px 0 0 14px;
}
.captcha-slider-text {
    pointer-events: none !important;
    user-select: none !important;
    -webkit-user-select: none !important;
  position: relative;
  z-index: 2;
  font-size: 12px;
  font-weight: 600;
  color: var(--ink-secondary);
  pointer-events: none;
  transition: opacity 0.2s var(--ease);
}
.captcha-slider-thumb {
    touch-action: none !important;
    user-select: none !important;
    -webkit-user-select: none !important;
    -webkit-user-drag: none !important;
  position: absolute;
  left: 4px;
  top: 4px;
  width: 40px;
  height: 40px;
  border-radius: 10px;
  background: var(--accent-blue);
  color: #ffffff;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: grab;
  z-index: 3;
  box-shadow: 0 4px 14px var(--accent-glow);
  transition: background 0.2s var(--ease);
}
.captcha-slider-thumb:active { cursor: grabbing; }
.captcha-slider-track.is-verified {
  border-color: #10b981;
  background: rgba(16, 185, 129, 0.12);
}
.captcha-slider-track.is-verified .captcha-slider-fill {
  background: rgba(16, 185, 129, 0.25);
  width: 100% !important;
}
.captcha-slider-track.is-verified .captcha-slider-thumb {
  background: #10b981;
  cursor: default;
  box-shadow: 0 4px 14px rgba(16, 185, 129, 0.35);
}
.captcha-slider-track.is-verified .captcha-slider-text {
  color: #10b981;
  font-weight: 600;
}

  /* WhiteLeaf In-Page Apple-Style Wiki System */
  .wiki-nav-btn {
    display: flex;
    align-items: center;
    gap: 10px;
    width: 100%;
    padding: 11px 14px;
    font-size: 13px;
    font-weight: 500;
    color: var(--text-muted);
    background: transparent;
    border: none;
    border-radius: 12px;
    cursor: pointer;
    text-align: left;
    transition: all 0.2s cubic-bezier(0.16, 1, 0.3, 1);
  }
  .wiki-nav-btn:hover {
    background: var(--accent-soft);
    color: var(--accent-blue);
  }
  .wiki-nav-btn.is-active {
    background: var(--accent-blue) !important;
    color: #ffffff !important;
    font-weight: 600;
    box-shadow: 0 4px 14px var(--accent-glow);
  }
  .wiki-panel {
    display: none;
    animation: wikiFadeIn 0.22s cubic-bezier(0.16, 1, 0.3, 1) forwards;
  }
  .wiki-panel.is-active {
    display: block;
  }
  @keyframes wikiFadeIn {
    from { opacity: 0; transform: translateY(8px); }
    to { opacity: 1; transform: translateY(0); }
  }
  .wiki-table {
    width: 100%;
    border-collapse: collapse;
    margin: 14px 0 20px;
    font-size: 13px;
    background: var(--bg-card);
    border-radius: 12px;
    overflow: hidden;
    border: 1px solid var(--border-glass);
  }
  .wiki-table th {
    background: var(--accent-soft);
    color: var(--accent-blue);
    font-weight: 600;
    text-align: left;
    padding: 10px 12px;
    border-bottom: 1px solid var(--border-glass);
  }
  .wiki-table td {
    padding: 10px 12px;
    border-bottom: 1px solid var(--border-glass);
    color: var(--text-main);
    vertical-align: top;
    line-height: 1.5;
  }
  .wiki-table tr:last-child td { border-bottom: none; }
  .cmd-badge {
    display: inline-block;
    background: var(--accent-soft);
    color: var(--accent-blue);
    font-family: var(--font-mono);
    font-size: 12px;
    font-weight: 600;
    padding: 2px 7px;
    border-radius: 6px;
    margin: 2px 4px 2px 0;
    cursor: pointer;
    transition: all 0.18s ease;
    border: 1px solid rgba(2, 132, 199, 0.2);
    user-select: none;
  }
  .cmd-badge:hover {
    background: var(--accent-blue);
    color: #ffffff;
    transform: translateY(-1px);
  }
  .wiki-card-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
    gap: 12px;
    margin: 14px 0 20px;
  }
  .wiki-card {
    background: var(--bg-card);
    border: 1px solid var(--border-glass);
    border-radius: 12px;
    padding: 14px;
    display: flex;
    flex-direction: column;
    gap: 5px;
    box-shadow: 0 4px 12px rgba(0,0,0,0.02);
  }
  .wiki-card-title {
    font-size: 14px;
    font-weight: 700;
    color: var(--text-main);
    display: flex;
    align-items: center;
    justify-content: space-between;
  }
  .wiki-card-desc {
    font-size: 12px;
    color: var(--text-muted);
    line-height: 1.5;
  }

  /* Triple-Barrier Scroll-Chaining & Modal Lock */
  body.is-modal-open {
    overflow: hidden !important;
    touch-action: none;
  }
  dialog,
  dialog *,
  .dialog-content,
  .wiki-content-pane,
  .wiki-sidebar,
  .wiki-panels,
  .wiki-panel {
    overscroll-behavior: contain !important;
  }


  /* ==========================================================================
     Apple-Grade Ghost Scrollbar System (全站自适应高级微光滚动条)
     彻底消灭 Windows 刺眼白灰原生粗滚动条
     ========================================================================== */
  :root {
    --scrollbar-thumb: rgba(2, 132, 199, 0.28);
    --scrollbar-thumb-hover: rgba(2, 132, 199, 0.5);
  }
  [data-theme="dark"] {
    --scrollbar-thumb: rgba(56, 189, 248, 0.25);
    --scrollbar-thumb-hover: rgba(56, 189, 248, 0.45);
  }

  /* 现代标准 (Firefox & Chromium 121+) */
  * {
    scrollbar-width: thin;
    scrollbar-color: var(--scrollbar-thumb) transparent;
  }

  /* WebKit 绝对控制 (Chrome, Edge, Safari, QQ, 360) */
  ::-webkit-scrollbar {
    width: 6px;
    height: 6px;
  }
  ::-webkit-scrollbar-track {
    background: transparent !important;
  }
  ::-webkit-scrollbar-thumb {
    background: var(--scrollbar-thumb) !important;
    border-radius: 9999px !important;
    border: none !important;
  }
  ::-webkit-scrollbar-thumb:hover {
    background: var(--scrollbar-thumb-hover) !important;
  }
  ::-webkit-scrollbar-corner {
    background: transparent !important;
  }
  ::-webkit-scrollbar-button {
    display: none !important;
    width: 0 !important;
    height: 0 !important;
  }



/* ==========================================================================
   Apple-Style Horizontal Narrative Reel & Pure Hero Stage
   ========================================================================== */
.hero-experience {
  position: relative;
  min-height: 84vh;
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
  padding: 130px 24px 70px;
}
.hero-prologue {
  position: relative;
  z-index: 20;
  max-width: 820px;
  text-align: center;
  margin: 0 auto;
}

/* Narrative Reel Section */
.narrative-reel-section {
  position: relative;
  padding: 40px 0 90px;
  overflow: hidden;
}
.reel-header-wrap {
  max-width: 1320px;
  margin: 0 auto 28px;
  padding: 0 32px;
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  gap: 20px;
}
.reel-section-title {
  font-family: var(--font-serif);
  font-size: clamp(28px, 3.6vw, 44px);
  font-weight: 700;
  letter-spacing: -0.02em;
  margin: 8px 0 0 0;
  color: var(--ink-primary);
}
.reel-header-controls {
  display: flex;
  align-items: center;
  gap: 18px;
}
.reel-counter {
  font-size: 14px;
  font-weight: 600;
  color: var(--ink-secondary);
  font-variant-numeric: tabular-nums;
}
.reel-counter strong {
  color: var(--accent-blue);
  font-size: 18px;
  font-weight: 800;
}
.reel-btn-group {
  display: flex;
  gap: 10px;
}
.reel-ctrl-btn {
  width: 44px;
  height: 44px;
  border-radius: 50%;
  background: var(--glass-surface-heavy);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border: 1px solid var(--glass-border);
  color: var(--ink-primary);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: all 0.25s var(--ease);
  box-shadow: 0 4px 16px rgba(0, 0, 0, 0.08);
}
.reel-ctrl-btn:hover {
  background: var(--accent-blue);
  color: #ffffff;
  border-color: var(--accent-blue);
  transform: scale(1.08);
  box-shadow: 0 6px 20px var(--accent-glow);
}
.reel-ctrl-btn:active {
  transform: scale(0.95);
}

/* Reel Track */
.reel-track-container {
  width: 100%;
  overflow-x: auto;
  overflow-y: hidden;
  scroll-behavior: smooth;
  -webkit-overflow-scrolling: touch;
  scrollbar-width: none;
  cursor: grab;
  user-select: none;
  touch-action: pan-x pan-y;
}
.reel-track-container::-webkit-scrollbar {
  display: none;
}
.reel-track-container.is-dragging {
  cursor: grabbing;
  scroll-behavior: auto;
}
.reel-track {
  display: flex;
  gap: 32px;
  padding-top: 16px;
  padding-bottom: 28px;
  padding-left: max(32px, calc((100vw - 1320px) / 2));
  padding-right: max(120px, calc(100vw - clamp(560px, 62vw, 840px) - 80px));
  width: max-content;
}

/* Reel Card: Apple iPad Pro Level Aesthetic */
.reel-card {
  position: relative;
  width: clamp(560px, 62vw, 840px);
  min-height: 450px;
  border-radius: 32px;
  background: var(--glass-surface-heavy);
  backdrop-filter: blur(20px) saturate(160%);
  -webkit-backdrop-filter: blur(20px) saturate(160%);
  border: 1px solid var(--glass-border);
  box-shadow: 0 20px 50px rgba(0, 0, 0, 0.12), 0 0 0 1px rgba(255, 255, 255, 0.05);
  display: flex;
  align-items: stretch;
  justify-content: space-between;
  overflow: hidden;
  transition: transform 0.35s cubic-bezier(0.2, 0.8, 0.2, 1), box-shadow 0.35s var(--ease), border-color 0.35s var(--ease);
  flex-shrink: 0;
}
.reel-card:hover {
  transform: translateY(-5px);
  box-shadow: 0 30px 75px rgba(0, 0, 0, 0.20), 0 0 35px var(--accent-glow);
  border-color: rgba(99, 179, 237, 0.45);
}
.reel-card.is-active {
  border-color: var(--accent-blue);
  box-shadow: 0 28px 70px rgba(0, 0, 0, 0.22), 0 0 45px var(--accent-glow);
}

/* Card Themes Accent Tint */
.reel-card.theme-land::before {
  content: '';
  position: absolute;
  top: 0; right: 0; width: 50%; height: 100%;
  background: radial-gradient(circle at 75% 60%, rgba(72, 187, 120, 0.15) 0%, transparent 70%);
  pointer-events: none;
}
.reel-card.theme-connect::before {
  content: '';
  position: absolute;
  top: 0; right: 0; width: 50%; height: 100%;
  background: radial-gradient(circle at 75% 60%, rgba(56, 178, 172, 0.18) 0%, transparent 70%);
  pointer-events: none;
}
.reel-card.theme-guard::before {
  content: '';
  position: absolute;
  top: 0; right: 0; width: 50%; height: 100%;
  background: radial-gradient(circle at 75% 60%, rgba(237, 137, 54, 0.15) 0%, transparent 70%);
  pointer-events: none;
}
.reel-card.theme-join::before {
  content: '';
  position: absolute;
  top: 0; right: 0; width: 50%; height: 100%;
  background: radial-gradient(circle at 75% 60%, rgba(66, 153, 225, 0.20) 0%, transparent 70%);
  pointer-events: none;
}

/* Card Content */
.reel-card-content {
  flex: 1.15;
  padding: clamp(34px, 4vw, 52px);
  display: flex;
  flex-direction: column;
  justify-content: center;
  z-index: 2;
}
.reel-card-badge {
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.15em;
  color: var(--accent-blue);
  text-transform: uppercase;
  margin-bottom: 16px;
  display: inline-flex;
  align-items: center;
  gap: 8px;
}
.reel-card-title {
  font-family: var(--font-serif);
  font-size: clamp(28px, 3.4vw, 42px);
  font-weight: 700;
  line-height: 1.2;
  letter-spacing: -0.03em;
  margin: 0 0 16px 0;
  color: var(--ink-primary);
}
.reel-card-desc {
  font-size: clamp(14px, 1.35vw, 16px);
  line-height: 1.85;
  color: var(--ink-secondary);
  margin: 0 0 24px 0;
}
.reel-card-footer {
  display: flex;
  align-items: center;
  gap: 14px;
  margin-top: auto;
}
.reel-card-hint {
  font-size: 13px;
  font-weight: 600;
  color: var(--ink-muted);
}

/* Mascot Visual inside Card */
.reel-card-visual {
  flex: 1;
  position: relative;
  display: flex;
  align-items: flex-end;
  justify-content: center;
  overflow: hidden;
  pointer-events: none;
  padding: 20px 24px 16px 0;
}
.reel-card-mascot {
  max-width: 100%;
  max-height: 96%;
  object-fit: contain;
  object-position: bottom center;
  filter: drop-shadow(0 18px 30px rgba(0, 0, 0, 0.45));
  transform: translateY(0);
  transition: transform 0.45s cubic-bezier(0.2, 0.8, 0.2, 1);
  will-change: transform;
}
.reel-card:hover .reel-card-mascot {
  transform: translateY(-6px) scale(1.03);
}

/* Dots Indicator */
.reel-dots-wrap {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  margin-top: 24px;
}
.reel-dot-btn {
  width: 24px;
  height: 6px;
  border-radius: 3px;
  background: var(--glass-border);
  border: none;
  cursor: pointer;
  transition: all 0.3s var(--ease);
}
.reel-dot-btn.is-active {
  width: 48px;
  background: var(--accent-blue);
  box-shadow: 0 0 10px var(--accent-glow);
}

@media (max-width: 768px) {
  .hero-experience {
    min-height: 70vh;
    padding: 100px 20px 40px;
  }
  .reel-card {
    width: 86vw;
    min-height: 500px;
    flex-direction: column;
  }
  .reel-card-content {
    padding: 28px 22px 14px;
  }
  .reel-card-visual {
    height: 220px;
  }
  .reel-card-mascot {
    max-height: 220px;
  }
  .reel-header-wrap {
    padding: 0 20px;
  }
}
`;