/* ==========================================================================
   廊坊市广阳区 · 城市美学志 H5 — Editorial Luxury Design System
   Palette: Obsidian (#0d0f12) · Travertine (#f3ede2) · Champagne Gold (#c7a667) · Vermilion (#96372e)
   ========================================================================== */

:root {
  --bg-obsidian: #0d0f12;
  --bg-obsidian-soft: #14171c;
  --bg-slate: #11151b;
  --bg-travertine: #f3ede2;
  --bg-travertine-alt: #eae2d3;
  --ink-dark: #181614;
  --ink-dark-muted: rgba(24, 22, 20, 0.68);
  --ink-light: #f5f0e6;
  --ink-light-muted: rgba(245, 240, 230, 0.72);
  --gold: #c7a667;
  --gold-bright: #e4c98e;
  --gold-dim: rgba(199, 166, 103, 0.28);
  --vermilion: #96372e;
  --jade: #647b78;
  --line-dark: rgba(24, 22, 20, 0.12);
  --line-light: rgba(245, 240, 230, 0.14);

  --font-serif: "Noto Serif SC", "Songti SC", "STSong", "Cormorant Garamond", Georgia, serif;
  --font-sans: "Noto Sans SC", "PingFang SC", "Hiragino Sans GB", -apple-system, BlinkMacSystemFont, sans-serif;
  --font-display-en: "Cormorant Garamond", Georgia, serif;

  --shell-width: 430px;
  --ease-editorial: cubic-bezier(0.22, 1, 0.36, 1);
}

*,
*::before,
*::after {
  box-sizing: border-box;
  -webkit-tap-highlight-color: transparent;
}

html {
  scroll-behavior: smooth;
  font-size: 16px;
  background: #07080a;
}

body {
  margin: 0;
  padding: 0;
  font-family: var(--font-sans);
  color: var(--ink-light);
  background: #07080a;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

/* Subtle paper/film grain overlay across viewport */
body::after {
  content: "";
  position: fixed;
  inset: 0;
  pointer-events: none;
  z-index: 90;
  opacity: 0.032;
  background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 200 200' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.85' numOctaves='3' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)'/%3E%3C/svg%3E");
}

button,
input {
  font-family: inherit;
}

/* ==========================================================================
   DESKTOP STUDIO BACKDROP (Visible on >= 760px viewports)
   ========================================================================== */
.desktop-backdrop {
  display: none;
}

@media (min-width: 760px) {
  body {
    background:
      radial-gradient(circle at 20% 25%, rgba(199, 166, 103, 0.08), transparent 45%),
      radial-gradient(circle at 80% 75%, rgba(150, 55, 46, 0.08), transparent 45%),
      #08090b;
  }

  .desktop-backdrop {
    display: flex;
    position: fixed;
    inset: 0;
    justify-content: space-between;
    align-items: center;
    padding: 0 clamp(28px, 5vw, 84px);
    pointer-events: none;
    z-index: 1;
  }

  .desktop-brand-col {
    width: calc((100vw - var(--shell-width)) / 2 - clamp(48px, 6vw, 110px));
    max-width: 260px;
    pointer-events: auto;
  }

  .desktop-kicker {
    margin: 0 0 12px;
    font-size: 10px;
    letter-spacing: 0.24em;
    color: var(--gold);
  }

  .desktop-title {
    margin: 0;
    font-family: var(--font-serif);
    font-size: 28px;
    font-weight: 500;
    letter-spacing: 0.14em;
    color: var(--ink-light);
  }

  .desktop-coords {
    margin: 10px 0 0;
    font-size: 11px;
    letter-spacing: 0.2em;
    color: rgba(245, 240, 230, 0.48);
  }

  .desktop-rule {
    width: 36px;
    height: 1px;
    background: var(--gold);
    margin: 20px 0;
    opacity: 0.65;
  }

  .desktop-desc {
    margin: 0;
    font-size: 13px;
    line-height: 1.8;
    color: rgba(245, 240, 230, 0.56);
    font-weight: 300;
  }

  .desktop-chapter-rail {
    list-style: none;
    margin: 0;
    padding: 0;
    display: flex;
    flex-direction: column;
    gap: 8px;
  }

  .desktop-chapter-rail button {
    background: none;
    border: none;
    padding: 5px 0;
    color: rgba(245, 240, 230, 0.42);
    font-size: 12px;
    letter-spacing: 0.12em;
    cursor: pointer;
    text-align: left;
    transition: color 0.35s var(--ease-editorial), transform 0.35s var(--ease-editorial);
  }

  .desktop-chapter-rail button:hover,
  .desktop-chapter-rail button.is-active {
    color: var(--gold-bright);
    transform: translateX(4px);
  }

  .desktop-stamp-status {
    margin-top: 24px;
    padding-top: 16px;
    border-top: 1px solid rgba(245, 240, 230, 0.1);
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 12px;
    color: rgba(245, 240, 230, 0.6);
  }

  .stamp-dot {
    width: 6px;
    height: 6px;
    border-radius: 50%;
    background: var(--vermilion);
    box-shadow: 0 0 10px rgba(150, 55, 46, 0.8);
  }
}

/* ==========================================================================
   MAIN H5 STAGE
   ========================================================================== */
.h5-shell {
  position: relative;
  width: 100%;
  max-width: var(--shell-width);
  margin: 0 auto;
  min-height: 100dvh;
  background: var(--bg-obsidian);
  z-index: 2;
  padding-bottom: 66px;
}

@media (min-width: 760px) {
  .h5-shell {
    box-shadow:
      0 0 0 1px rgba(199, 166, 103, 0.16),
      0 32px 90px rgba(0, 0, 0, 0.72);
  }
}

/* ==========================================================================
   PERSISTENT TOP BAR
   ========================================================================== */
.top-bar {
  position: fixed;
  top: 0;
  left: 50%;
  transform: translateX(-50%);
  width: min(var(--shell-width), 100vw);
  z-index: 40;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  padding: calc(12px + env(safe-area-inset-top)) 18px 12px;
  background: linear-gradient(to bottom, rgba(13, 15, 18, 0.84), rgba(13, 15, 18, 0));
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  transition: background 0.4s ease, color 0.4s ease;
}

.top-bar.is-light-mode {
  background: linear-gradient(to bottom, rgba(243, 237, 226, 0.9), rgba(243, 237, 226, 0));
  color: var(--ink-dark);
}

.top-mono {
  font-size: 10px;
  letter-spacing: 0.2em;
  opacity: 0.78;
}

.top-bar-center {
  flex: 1;
  display: flex;
  align-items: center;
}

.top-progress-track {
  display: block;
  width: 100%;
  height: 1px;
  background: rgba(199, 166, 103, 0.22);
  position: relative;
  overflow: hidden;
}

.top-progress-fill {
  display: block;
  width: 0%;
  height: 100%;
  background: linear-gradient(90deg, var(--gold), var(--gold-bright));
  transition: width 0.12s linear;
}

.audio-toggle {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 5px 10px;
  border-radius: 999px;
  border: 1px solid rgba(199, 166, 103, 0.35);
  background: rgba(13, 15, 18, 0.45);
  color: var(--gold-bright);
  font-size: 11px;
  letter-spacing: 0.1em;
  cursor: pointer;
  transition: all 0.3s ease;
}

.top-bar.is-light-mode .audio-toggle {
  background: rgba(243, 237, 226, 0.75);
  color: var(--ink-dark);
  border-color: rgba(24, 22, 20, 0.2);
}

.audio-bars {
  display: inline-flex;
  align-items: flex-end;
  gap: 2px;
  height: 10px;
}

.audio-bars i {
  display: block;
  width: 1.5px;
  height: 4px;
  background: currentColor;
  border-radius: 1px;
  transition: height 0.2s ease;
}

.audio-bars i:nth-child(2) {
  height: 7px;
}

.audio-toggle.is-playing .audio-bars i {
  animation: soundWave 0.9s ease-in-out infinite alternate;
}

.audio-toggle.is-playing .audio-bars i:nth-child(2) {
  animation-delay: 0.2s;
}

.audio-toggle.is-playing .audio-bars i:nth-child(3) {
  animation-delay: 0.4s;
}

@keyframes soundWave {
  from { height: 3px; }
  to { height: 10px; }
}

/* ==========================================================================
   CHAPTER 00: COVER / OPENING RITUAL
   ========================================================================== */
.chapter {
  position: relative;
  overflow: hidden;
}

.chapter-cover {
  min-height: 100dvh;
  display: flex;
  flex-direction: column;
  background: var(--bg-obsidian);
}

.cover-media {
  position: absolute;
  inset: 0;
  overflow: hidden;
}

.cover-img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center;
  transform: scale(1.04);
  animation: slowBreathe 18s ease-in-out infinite alternate;
}

@keyframes slowBreathe {
  from { transform: scale(1.03); }
  to { transform: scale(1.1); }
}

.cover-vignette {
  position: absolute;
  inset: 0;
  background:
    linear-gradient(to bottom, rgba(10, 12, 16, 0.74) 0%, rgba(10, 12, 16, 0.38) 42%, rgba(10, 12, 16, 0.88) 100%),
    linear-gradient(to right, rgba(8, 10, 13, 0.72) 0%, rgba(8, 10, 13, 0.36) 58%, rgba(8, 10, 13, 0.15) 100%);
}

@keyframes coverEnter {
  from {
    opacity: 0.2;
    transform: translateY(10px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.cover-fade {
  animation: coverEnter 0.65s var(--ease-editorial) both;
  animation-delay: var(--delay, 0s);
}

.ambient-canvas {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  pointer-events: none;
}

.cover-content {
  position: relative;
  z-index: 3;
  flex: 1;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  padding: calc(64px + env(safe-area-inset-top)) 26px 86px;
}

.cover-meta-row {
  display: flex;
  justify-content: space-between;
  align-items: center;
  border-bottom: 1px solid rgba(199, 166, 103, 0.22);
  padding-bottom: 12px;
}

.eyebrow-mono {
  font-size: 10px;
  letter-spacing: 0.18em;
  color: rgba(245, 240, 230, 0.74);
  font-weight: 300;
}

.cover-centerpiece {
  margin: auto 0;
  padding: 20px 0;
  text-align: left;
}

.seal-mark {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 32px;
  padding: 6px 0;
  margin-bottom: 18px;
  border: 1px solid rgba(150, 55, 46, 0.9);
  background: rgba(150, 55, 46, 0.88);
  color: #f6efe4;
  font-family: var(--font-serif);
  font-size: 12px;
  line-height: 1.2;
  text-align: center;
  box-shadow: 0 8px 22px rgba(150, 55, 46, 0.32);
}

.cover-pretitle {
  margin: 0 0 12px;
  font-size: 12px;
  letter-spacing: 0.24em;
  color: var(--gold-bright);
  font-weight: 300;
}

.cover-title {
  margin: 0;
  font-family: var(--font-serif);
  font-weight: 500;
  line-height: 1.12;
  letter-spacing: 0.14em;
  font-size: clamp(44px, 12vw, 56px);
  color: var(--ink-light);
}

.cover-title .title-line {
  display: block;
}

.cover-title .title-gold {
  margin-top: 6px;
  font-size: clamp(34px, 9.2vw, 44px);
  background: linear-gradient(120deg, #f5efe3 10%, #e5ca92 55%, #b8914e 100%);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

.cover-subtitle {
  margin: 18px 0 0;
  font-size: 13.5px;
  line-height: 1.85;
  color: rgba(245, 240, 230, 0.9);
  font-weight: 300;
  letter-spacing: 0.06em;
  text-shadow: 0 2px 14px rgba(8, 10, 13, 0.85);
}

.cover-cta-wrap {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 18px;
}

.unveil-btn {
  position: relative;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 196px;
  height: 54px;
  border-radius: 999px;
  border: 1px solid rgba(199, 166, 103, 0.55);
  background: rgba(13, 15, 18, 0.55);
  backdrop-filter: blur(10px);
  color: var(--ink-light);
  cursor: pointer;
  transition: transform 0.35s var(--ease-editorial), border-color 0.35s ease, background 0.35s ease;
}

.unveil-btn:hover,
.unveil-btn:active {
  transform: scale(0.97);
  border-color: var(--gold-bright);
  background: rgba(199, 166, 103, 0.14);
}

.unveil-ring {
  position: absolute;
  inset: -6px;
  border-radius: 999px;
  border: 1px solid rgba(199, 166, 103, 0.25);
  animation: pulseRing 2.8s cubic-bezier(0.22, 1, 0.36, 1) infinite;
  pointer-events: none;
}

@keyframes pulseRing {
  0% { transform: scale(0.96); opacity: 0.85; }
  75%, 100% { transform: scale(1.08, 1.24); opacity: 0; }
}

.unveil-core {
  display: flex;
  flex-direction: column;
  align-items: center;
  line-height: 1.25;
}

.unveil-cn {
  font-family: var(--font-serif);
  font-size: 14px;
  letter-spacing: 0.26em;
  color: var(--gold-bright);
}

.unveil-en {
  font-size: 8.5px;
  letter-spacing: 0.22em;
  color: rgba(245, 240, 230, 0.6);
  margin-top: 2px;
}

.scroll-cue {
  margin: 0;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 8px;
  font-size: 10px;
  letter-spacing: 0.22em;
  color: rgba(245, 240, 230, 0.52);
}

.cue-line {
  display: block;
  width: 1px;
  height: 22px;
  background: linear-gradient(to bottom, var(--gold), transparent);
}

/* ==========================================================================
   CHAPTER COMMON EDITORIAL TYPOGRAPHY & THEMES
   ========================================================================== */
.chapter-light {
  background: var(--bg-travertine);
  color: var(--ink-dark);
}

.chapter-dark {
  background: var(--bg-obsidian);
  color: var(--ink-light);
}

.chapter-slate {
  background: linear-gradient(180deg, #0d0f12 0%, #131820 55%, #0e1218 100%);
  color: var(--ink-light);
}

.chapter-inner {
  padding: 58px 24px 66px;
}

.chapter-header {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  margin-bottom: 22px;
}

.chapter-index-row {
  display: flex;
  align-items: baseline;
  gap: 8px;
  padding-top: 6px;
  border-top: 1px solid currentColor;
  border-top-color: rgba(199, 166, 103, 0.45);
}

.index-num {
  font-family: var(--font-display-en);
  font-size: 24px;
  font-style: italic;
  color: var(--gold);
  line-height: 1;
}

.index-slash {
  opacity: 0.35;
  font-size: 12px;
}

.index-label {
  font-size: 10px;
  letter-spacing: 0.22em;
  opacity: 0.68;
}

.vertical-stamp {
  writing-mode: vertical-rl;
  font-family: var(--font-serif);
  font-size: 12px;
  letter-spacing: 0.28em;
  padding: 7px 5px;
  border: 1px solid rgba(150, 55, 46, 0.45);
  color: var(--vermilion);
}

.vertical-stamp-gold {
  border-color: rgba(199, 166, 103, 0.45);
  color: var(--gold);
}

.display-heading {
  margin: 0 0 18px;
  font-family: var(--font-serif);
  font-size: clamp(30px, 8vw, 36px);
  font-weight: 500;
  line-height: 1.24;
  letter-spacing: 0.08em;
  color: var(--ink-dark);
}

.display-heading-light {
  color: var(--ink-light);
}

.editorial-lead {
  margin: 0 0 28px;
  font-size: 14px;
  line-height: 1.9;
  color: var(--ink-dark-muted);
  font-weight: 300;
  text-align: justify;
}

.editorial-lead strong {
  color: var(--ink-dark);
  font-weight: 500;
}

.editorial-lead-light {
  color: var(--ink-light-muted);
}

.editorial-lead-light strong {
  color: var(--gold-bright);
}

/* Scroll Reveal Animations */
.reveal-up {
  opacity: 0;
  transform: translateY(22px);
  transition: opacity 0.85s var(--ease-editorial), transform 0.85s var(--ease-editorial);
  transition-delay: var(--delay, 0s);
}

.reveal-up.is-visible {
  opacity: 1;
  transform: translateY(0);
}

/* ==========================================================================
   CHAPTER 01: CORRIDOR / GEODESIC NEXUS
   ========================================================================== */
.corridor-card {
  background: #ebe4d6;
  border: 1px solid var(--line-dark);
  padding: 18px 16px;
  margin-bottom: 24px;
}

.corridor-card-head {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  align-items: center;
  gap: 8px;
  margin-bottom: 10px;
}

.mono-tag {
  font-size: 9.5px;
  letter-spacing: 0.14em;
  color: rgba(24, 22, 20, 0.56);
}

.corridor-live-pill {
  font-size: 10.5px;
  padding: 4px 10px;
  background: var(--ink-dark);
  color: var(--gold-bright);
  letter-spacing: 0.06em;
  white-space: nowrap;
}

.corridor-svg-stage {
  background: #14171c;
  border: 1px solid rgba(199, 166, 103, 0.25);
  margin: 8px 0 14px;
  padding: 6px;
}

.corridor-svg {
  display: block;
  width: 100%;
  height: auto;
}

.radar-ring {
  fill: none;
  stroke: rgba(199, 166, 103, 0.14);
  stroke-width: 0.75;
}

.radar-ring-dash {
  stroke-dasharray: 3 4;
}

.radar-axis {
  stroke: rgba(245, 240, 230, 0.08);
  stroke-width: 0.75;
}

.geo-arc {
  fill: none;
  stroke: rgba(245, 240, 230, 0.2);
  stroke-width: 1.2;
  stroke-dasharray: 4 3;
  transition: stroke 0.4s ease, stroke-width 0.4s ease;
}

.geo-arc.is-active {
  stroke: var(--gold-bright);
  stroke-width: 2;
  stroke-dasharray: 220;
  stroke-dashoffset: 0;
  animation: drawArc 0.7s var(--ease-editorial);
}

@keyframes drawArc {
  from { stroke-dashoffset: 180; }
  to { stroke-dashoffset: 0; }
}

.geo-node {
  cursor: pointer;
}

.node-halo {
  fill: rgba(199, 166, 103, 0.08);
  transition: fill 0.3s ease, r 0.3s ease;
}

.node-core {
  fill: rgba(245, 240, 230, 0.55);
  transition: fill 0.3s ease;
}

.node-label {
  fill: rgba(245, 240, 230, 0.65);
  font-size: 9.5px;
  font-family: var(--font-sans);
  letter-spacing: 0.05em;
}

.geo-node.is-active .node-halo {
  fill: rgba(199, 166, 103, 0.28);
}

.geo-node.is-active .node-core {
  fill: var(--gold-bright);
}

.geo-node.is-active .node-label {
  fill: var(--gold-bright);
  font-weight: 500;
}

.gy-center-dot {
  fill: var(--vermilion);
  stroke: #f5efe3;
  stroke-width: 1.5;
}

.gy-center-ring {
  fill: none;
  stroke: rgba(199, 166, 103, 0.7);
  stroke-width: 1;
}

.gy-center-label {
  fill: #f5efe3;
  font-family: var(--font-serif);
  font-size: 11px;
  letter-spacing: 0.1em;
}

.gy-center-sub {
  fill: var(--gold);
  font-size: 7.5px;
  letter-spacing: 0.2em;
}

.corridor-tabs {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 8px;
  margin-bottom: 14px;
}

.corridor-tab {
  padding: 9px 10px;
  border: 1px solid rgba(24, 22, 20, 0.16);
  background: rgba(255, 255, 255, 0.42);
  color: var(--ink-dark-muted);
  font-size: 11.5px;
  letter-spacing: 0.04em;
  cursor: pointer;
  transition: all 0.25s ease;
}

.corridor-tab.is-active {
  background: var(--ink-dark);
  color: var(--gold-bright);
  border-color: var(--ink-dark);
}

.corridor-detail {
  padding-top: 12px;
  border-top: 1px solid var(--line-dark);
}

.corridor-stat-big {
  font-family: var(--font-serif);
  font-size: 24px;
  color: var(--vermilion);
  margin-bottom: 4px;
  letter-spacing: 0.06em;
}

.corridor-stat-desc {
  margin: 0;
  font-size: 12.5px;
  line-height: 1.7;
  color: var(--ink-dark-muted);
}

.metrics-strip {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 18px 8px;
  border-top: 1px solid var(--line-dark);
  border-bottom: 1px solid var(--line-dark);
}

.metric-item {
  flex: 1;
  text-align: center;
}

.metric-val {
  display: block;
  font-family: var(--font-display-en);
  font-size: 24px;
  font-weight: 500;
  color: var(--ink-dark);
  line-height: 1.1;
}

.metric-val small {
  font-family: var(--font-sans);
  font-size: 11px;
  margin-left: 2px;
  color: var(--vermilion);
}

.metric-key {
  display: block;
  margin-top: 5px;
  font-size: 10.5px;
  letter-spacing: 0.06em;
  color: var(--ink-dark-muted);
}

.metric-divider {
  width: 1px;
  height: 30px;
  background: var(--line-dark);
}

/* ==========================================================================
   CHAPTER 02: ART & LANDMARKS GALLERY
   ========================================================================== */
.gallery-controls {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 14px;
}

.gallery-dots {
  display: flex;
  gap: 6px;
}

.gallery-dots span {
  width: 16px;
  height: 2px;
  background: rgba(245, 240, 230, 0.22);
  transition: width 0.3s ease, background 0.3s ease;
}

.gallery-dots span.is-active {
  width: 28px;
  background: var(--gold);
}

.gallery-arrows {
  display: flex;
  gap: 8px;
}

.arrow-btn {
  width: 32px;
  height: 32px;
  border-radius: 50%;
  border: 1px solid rgba(199, 166, 103, 0.35);
  background: transparent;
  color: var(--gold-bright);
  font-size: 13px;
  cursor: pointer;
  transition: background 0.25s ease, color 0.25s ease;
}

.arrow-btn:hover {
  background: rgba(199, 166, 103, 0.16);
}

.art-track {
  display: flex;
  gap: 14px;
  overflow-x: auto;
  scroll-snap-type: x mandatory;
  padding-bottom: 10px;
  scrollbar-width: none;
  margin: 0 -24px;
  padding-left: 24px;
  padding-right: 24px;
}

.art-track::-webkit-scrollbar {
  display: none;
}

.art-card {
  flex: 0 0 84%;
  scroll-snap-align: center;
  background: var(--bg-obsidian-soft);
  border: 1px solid var(--line-light);
  cursor: pointer;
  transition: border-color 0.35s ease, transform 0.35s var(--ease-editorial);
}

.art-card:hover {
  border-color: rgba(199, 166, 103, 0.55);
}

.art-card-visual {
  position: relative;
  aspect-ratio: 4 / 5;
  overflow: hidden;
  background: #181a1f;
}

.art-card-visual img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.8s var(--ease-editorial);
}

.art-card:hover .art-card-visual img {
  transform: scale(1.04);
}

/* Bespoke architectural framing across cards */
.art-card-visual-cloud img {
  object-position: 78% 50%;
  transform: scale(1.65);
  transform-origin: 78% 50%;
  filter: contrast(1.06) brightness(1.04);
}

.art-card:hover .art-card-visual-cloud img {
  transform: scale(1.72);
}

.art-card-visual-pavilion img {
  object-position: 86% 42%;
  transform: scale(1.58);
  transform-origin: 86% 42%;
  filter: contrast(1.04) saturate(0.9);
}

.art-card:hover .art-card-visual-pavilion img {
  transform: scale(1.64);
}

.art-card-visual-lane img {
  object-position: 16% 56%;
  transform: scale(1.52);
  transform-origin: 16% 56%;
  filter: saturate(1.08) contrast(1.05);
}

.art-card:hover .art-card-visual-lane img {
  transform: scale(1.58);
}

.art-card-badge {
  position: absolute;
  top: 12px;
  left: 12px;
  padding: 4px 10px;
  background: rgba(13, 15, 18, 0.72);
  backdrop-filter: blur(6px);
  border: 1px solid rgba(199, 166, 103, 0.38);
  color: var(--gold-bright);
  font-size: 10px;
  letter-spacing: 0.14em;
}

.art-stamp-badge {
  position: absolute;
  top: 12px;
  right: 12px;
  padding: 4px 8px;
  font-size: 10px;
  letter-spacing: 0.1em;
  background: rgba(13, 15, 18, 0.65);
  color: rgba(245, 240, 230, 0.65);
  border: 1px solid rgba(245, 240, 230, 0.2);
}

.art-stamp-badge.is-collected {
  background: rgba(150, 55, 46, 0.92);
  color: #f6efe4;
  border-color: rgba(228, 201, 142, 0.5);
}

.art-card-body {
  padding: 18px 18px 20px;
}

.art-card-body h3 {
  margin: 0 0 6px;
  font-family: var(--font-serif);
  font-size: 20px;
  font-weight: 500;
  color: var(--ink-light);
  letter-spacing: 0.06em;
}

.art-card-sub {
  margin: 0 0 10px;
  font-size: 11px;
  color: var(--gold);
  letter-spacing: 0.08em;
}

.art-card-excerpt {
  margin: 0 0 14px;
  font-size: 13px;
  line-height: 1.75;
  color: var(--ink-light-muted);
  font-weight: 300;
}

.art-card-link {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 11.5px;
  letter-spacing: 0.14em;
  color: var(--gold-bright);
}

/* ==========================================================================
   CHAPTER 03: SANCTUARY / PARKS & LIGHT MODES
   ========================================================================== */
.sanctuary-showcase {
  margin-bottom: 26px;
}

.sanctuary-frame {
  position: relative;
  aspect-ratio: 4 / 5;
  overflow: hidden;
  border: 1px solid var(--line-dark);
}

.sanctuary-img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: filter 0.8s var(--ease-editorial), transform 1.2s var(--ease-editorial);
}

.sanctuary-tint {
  position: absolute;
  inset: 0;
  pointer-events: none;
  transition: background 0.8s var(--ease-editorial);
}

.sanctuary-frame.is-dawn .sanctuary-img {
  filter: brightness(1.02) saturate(0.95);
}
.sanctuary-frame.is-dawn .sanctuary-tint {
  background: linear-gradient(to top, rgba(18, 24, 24, 0.78) 0%, rgba(235, 226, 208, 0.12) 55%, rgba(255, 245, 224, 0.15) 100%);
}

.sanctuary-frame.is-noon .sanctuary-img {
  filter: brightness(1.08) contrast(1.04) saturate(1.1);
}
.sanctuary-frame.is-noon .sanctuary-tint {
  background: linear-gradient(to top, rgba(16, 22, 18, 0.72) 0%, rgba(199, 166, 103, 0.05) 60%, transparent 100%);
}

.sanctuary-frame.is-dusk .sanctuary-img {
  filter: brightness(0.76) contrast(1.12) sepia(0.24) saturate(1.15);
}
.sanctuary-frame.is-dusk .sanctuary-tint {
  background: linear-gradient(to top, rgba(13, 15, 18, 0.88) 0%, rgba(150, 55, 46, 0.18) 55%, rgba(26, 22, 34, 0.24) 100%);
}

.sanctuary-caption-overlay {
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  padding: 22px 18px 18px;
  color: #f6f1e7;
}

.sanctuary-mood-tag {
  display: inline-block;
  font-size: 10px;
  letter-spacing: 0.2em;
  color: var(--gold-bright);
  margin-bottom: 6px;
}

.sanctuary-poetic-line {
  margin: 0;
  font-family: var(--font-serif);
  font-size: 14.5px;
  line-height: 1.7;
  letter-spacing: 0.04em;
}

.mood-switcher {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  border: 1px solid var(--line-dark);
  border-top: none;
  background: #e9e1d2;
}

.mood-btn {
  padding: 11px 6px;
  border: none;
  border-right: 1px solid var(--line-dark);
  background: transparent;
  color: var(--ink-dark-muted);
  font-size: 11px;
  letter-spacing: 0.12em;
  cursor: pointer;
  transition: all 0.3s ease;
}

.mood-btn:last-child {
  border-right: none;
}

.mood-btn.is-active {
  background: var(--ink-dark);
  color: var(--gold-bright);
}

/* Park Accordion */
.park-accordion {
  border-top: 1px solid var(--line-dark);
}

.park-item {
  width: 100%;
  text-align: left;
  background: transparent;
  border: none;
  border-bottom: 1px solid var(--line-dark);
  padding: 16px 2px;
  color: var(--ink-dark);
  cursor: pointer;
}

.park-head {
  display: flex;
  align-items: center;
  gap: 14px;
}

.park-num {
  font-family: var(--font-display-en);
  font-style: italic;
  font-size: 18px;
  color: var(--vermilion);
  min-width: 24px;
}

.park-title-wrap {
  flex: 1;
  display: flex;
  flex-direction: column;
  gap: 3px;
}

.park-title-wrap strong {
  font-family: var(--font-serif);
  font-size: 16px;
  font-weight: 500;
  letter-spacing: 0.06em;
}

.park-title-wrap span {
  font-size: 11.5px;
  color: var(--ink-dark-muted);
}

.park-plus {
  position: relative;
  width: 14px;
  height: 14px;
}

.park-plus::before,
.park-plus::after {
  content: "";
  position: absolute;
  background: var(--ink-dark);
  transition: transform 0.3s ease;
}

.park-plus::before {
  top: 6.5px;
  left: 0;
  right: 0;
  height: 1px;
}

.park-plus::after {
  left: 6.5px;
  top: 0;
  bottom: 0;
  width: 1px;
}

.park-item.is-open .park-plus::after {
  transform: rotate(90deg);
  opacity: 0;
}

.park-body {
  max-height: 0;
  overflow: hidden;
  padding-left: 38px;
  font-size: 13px;
  line-height: 1.75;
  color: var(--ink-dark-muted);
  transition: max-height 0.45s var(--ease-editorial), margin-top 0.35s ease;
}

.park-item.is-open .park-body {
  max-height: 160px;
  margin-top: 10px;
}

/* ==========================================================================
   CHAPTER 04: HERITAGE & SOUND
   ========================================================================== */
.heritage-plate {
  border: 1px solid rgba(199, 166, 103, 0.32);
  padding: 10px;
  background: #13161b;
  margin-bottom: 24px;
}

.heritage-svg-stage {
  position: relative;
  width: 100%;
  aspect-ratio: 4 / 3;
  background:
    radial-gradient(circle at 50% 45%, rgba(199, 166, 103, 0.16) 0%, rgba(150, 55, 46, 0.08) 40%, #0d0f13 78%);
  border: 1px solid rgba(199, 166, 103, 0.16);
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
}

.heritage-svg-stage svg {
  width: 100%;
  height: 100%;
  display: block;
}

@keyframes ripplePulse {
  0% { transform: scale(0.92); opacity: 0.65; }
  100% { transform: scale(1.12); opacity: 0; }
}

.heritage-ripple {
  transform-origin: center;
  animation: ripplePulse 2.4s cubic-bezier(0.22, 1, 0.36, 1) infinite;
}

.heritage-plate-caption {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  align-items: center;
  gap: 6px 12px;
  padding: 12px 4px 4px;
  font-size: 10.5px;
  letter-spacing: 0.1em;
  color: rgba(245, 240, 230, 0.65);
}

.heritage-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 12px;
}

.heritage-item {
  text-align: left;
  padding: 18px 16px;
  background: rgba(255, 255, 255, 0.025);
  border: 1px solid var(--line-light);
  color: var(--ink-light);
  cursor: pointer;
  transition: border-color 0.3s ease, background 0.3s ease, transform 0.25s ease;
}

.heritage-item:hover,
.heritage-item.is-active {
  border-color: var(--gold);
  background: rgba(199, 166, 103, 0.08);
}

.heritage-top {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 8px;
}

.heritage-tag {
  font-size: 10px;
  letter-spacing: 0.16em;
  color: var(--gold);
}

.heritage-sound-icon {
  font-size: 10.5px;
  color: rgba(245, 240, 230, 0.65);
  letter-spacing: 0.08em;
}

.heritage-item.is-active .heritage-sound-icon {
  color: var(--gold-bright);
}

.heritage-item h3 {
  margin: 0 0 6px;
  font-family: var(--font-serif);
  font-size: 18px;
  font-weight: 500;
  letter-spacing: 0.06em;
}

.heritage-item p {
  margin: 0;
  font-size: 12.5px;
  line-height: 1.75;
  color: var(--ink-light-muted);
  font-weight: 300;
}

/* ==========================================================================
   CHAPTER 05: AEROTROPOLIS
   ========================================================================== */
.aero-visual-card {
  position: relative;
  border: 1px solid rgba(199, 166, 103, 0.28);
  margin-bottom: 22px;
  overflow: hidden;
  background: #0d0f12;
}

.aero-visual-card .aero-hero-img {
  display: block;
  width: 100%;
  aspect-ratio: 4 / 3;
  object-fit: cover;
  object-position: 62% 38%;
  filter: contrast(1.06) brightness(0.94);
}

.aero-telemetry-svg {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  pointer-events: none;
}

.aero-overlay-badge {
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  padding: 28px 18px 18px;
  background: linear-gradient(to top, rgba(13, 15, 18, 0.92), transparent);
}

.aero-overlay-badge span {
  display: block;
  font-size: 9.5px;
  letter-spacing: 0.2em;
  color: var(--gold);
  margin-bottom: 4px;
}

.aero-overlay-badge strong {
  font-family: var(--font-serif);
  font-size: 18px;
  font-weight: 500;
  letter-spacing: 0.08em;
  color: var(--ink-light);
}

.aero-tabs {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 8px;
  margin-bottom: 16px;
}

.aero-tab {
  padding: 10px 6px;
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid var(--line-light);
  color: rgba(245, 240, 230, 0.68);
  font-size: 12px;
  letter-spacing: 0.08em;
  cursor: pointer;
  transition: all 0.25s ease;
}

.aero-tab.is-active {
  background: var(--gold);
  border-color: var(--gold);
  color: var(--ink-dark);
  font-weight: 500;
}

.aero-panel-grid {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.aero-pillar {
  padding: 16px;
  background: rgba(255, 255, 255, 0.03);
  border-left: 2px solid var(--gold);
}

.pillar-code {
  display: block;
  font-size: 9.5px;
  letter-spacing: 0.2em;
  color: var(--gold);
  margin-bottom: 5px;
}

.aero-pillar h4 {
  margin: 0 0 6px;
  font-family: var(--font-serif);
  font-size: 16px;
  font-weight: 500;
  color: var(--ink-light);
}

.aero-pillar p {
  margin: 0;
  font-size: 12.5px;
  line-height: 1.75;
  color: var(--ink-light-muted);
  font-weight: 300;
}

.district-chips {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 8px;
}

.district-chip {
  padding: 6px 10px;
  border: 1px solid rgba(199, 166, 103, 0.35);
  background: rgba(199, 166, 103, 0.08);
  color: var(--ink-light);
  font-size: 11.5px;
  letter-spacing: 0.06em;
}

.district-chip-muted {
  border-color: rgba(245, 240, 230, 0.22);
  background: rgba(255, 255, 255, 0.03);
  color: rgba(245, 240, 230, 0.78);
}

/* ==========================================================================
   CHAPTER 06: KEEPSAKE POSTCARD STUDIO
   ========================================================================== */
.keepsake-studio {
  background: #eae2d3;
  border: 1px solid var(--line-dark);
  padding: 20px 16px;
}

.control-block {
  margin-bottom: 16px;
}

.control-label {
  display: block;
  font-size: 11.5px;
  letter-spacing: 0.1em;
  color: var(--ink-dark);
  margin-bottom: 9px;
  font-weight: 500;
}

.theme-pills {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 8px;
}

.theme-pill {
  padding: 9px 10px;
  border: 1px solid rgba(24, 22, 20, 0.18);
  background: rgba(255, 255, 255, 0.45);
  color: var(--ink-dark);
  font-size: 12px;
  letter-spacing: 0.08em;
  cursor: pointer;
  transition: all 0.25s ease;
}

.theme-pill.is-active {
  background: var(--ink-dark);
  border-color: var(--ink-dark);
  color: var(--gold-bright);
}

.signature-row {
  display: flex;
  align-items: center;
  gap: 10px;
}

.signature-row input {
  flex: 1;
  min-width: 0;
  padding: 10px 12px;
  border: 1px solid rgba(24, 22, 20, 0.2);
  background: rgba(255, 255, 255, 0.7);
  color: var(--ink-dark);
  font-size: 13px;
  outline: none;
}

.signature-row input:focus {
  border-color: var(--vermilion);
}

.collected-badge {
  font-size: 11px;
  padding: 9px 10px;
  background: rgba(150, 55, 46, 0.1);
  border: 1px solid rgba(150, 55, 46, 0.3);
  color: var(--vermilion);
  white-space: nowrap;
}

.postcard-preview-wrap {
  margin: 16px 0;
  background: #14171c;
  padding: 10px;
  box-shadow: 0 18px 36px rgba(24, 22, 20, 0.16);
}

#postcardCanvas {
  display: block;
  width: 100%;
  height: auto;
}

.download-btn {
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  padding: 14px 18px;
  border: none;
  background: var(--ink-dark);
  color: var(--gold-bright);
  font-family: var(--font-serif);
  font-size: 14.5px;
  letter-spacing: 0.16em;
  cursor: pointer;
  transition: background 0.3s ease, transform 0.25s ease;
}

.download-btn:hover {
  background: #272320;
}

.download-btn:active {
  transform: scale(0.985);
}

.download-hint {
  margin: 10px 0 0;
  font-size: 11px;
  text-align: center;
  color: var(--ink-dark-muted);
}

.h5-footer {
  margin-top: 46px;
  padding-top: 32px;
  border-top: 1px solid var(--line-dark);
  text-align: center;
}

.footer-seal {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 38px;
  height: 38px;
  border: 1px solid var(--vermilion);
  color: var(--vermilion);
  font-family: var(--font-serif);
  font-size: 13px;
  margin-bottom: 12px;
}

.footer-title {
  margin: 0 0 4px;
  font-family: var(--font-serif);
  font-size: 15px;
  letter-spacing: 0.18em;
  color: var(--ink-dark);
}

.footer-meta {
  margin: 0 0 18px;
  font-size: 10px;
  letter-spacing: 0.22em;
  color: var(--ink-dark-muted);
}

.back-top-btn {
  background: transparent;
  border: 1px solid rgba(24, 22, 20, 0.24);
  padding: 8px 18px;
  font-size: 11.5px;
  letter-spacing: 0.14em;
  color: var(--ink-dark);
  cursor: pointer;
}

/* ==========================================================================
   PERSISTENT MINIMAL BOTTOM NAVIGATION DOCK
   ========================================================================== */
.bottom-dock {
  position: fixed;
  bottom: 0;
  left: 50%;
  transform: translateX(-50%);
  width: min(var(--shell-width), 100vw);
  z-index: 45;
  display: grid;
  grid-template-columns: repeat(7, 1fr);
  padding: 8px 6px calc(10px + env(safe-area-inset-bottom));
  background: rgba(13, 15, 18, 0.9);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  border-top: 1px solid rgba(199, 166, 103, 0.24);
}

.dock-btn {
  background: none;
  border: none;
  padding: 7px 2px;
  font-size: 11px;
  letter-spacing: 0.06em;
  color: rgba(245, 240, 230, 0.52);
  cursor: pointer;
  position: relative;
  transition: color 0.3s ease;
}

.dock-btn.is-active {
  color: var(--gold-bright);
  font-weight: 500;
}

.dock-btn.is-active::after {
  content: "";
  position: absolute;
  left: 50%;
  bottom: 1px;
  transform: translateX(-50%);
  width: 14px;
  height: 1.5px;
  background: var(--gold-bright);
}

/* ==========================================================================
   ARCHITECTURAL DOSSIER SLIDE-UP SHEET
   ========================================================================== */
.dossier-backdrop {
  position: fixed;
  inset: 0;
  z-index: 70;
  background: rgba(7, 8, 10, 0.72);
  backdrop-filter: blur(6px);
  display: flex;
  align-items: flex-end;
  justify-content: center;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.35s ease;
}

.dossier-backdrop.is-open {
  opacity: 1;
  pointer-events: auto;
}

.dossier-sheet {
  position: relative;
  width: min(var(--shell-width), 100vw);
  background: #14171c;
  border-top: 1px solid rgba(199, 166, 103, 0.4);
  padding: 12px 24px calc(28px + env(safe-area-inset-bottom));
  color: var(--ink-light);
  transform: translateY(100%);
  transition: transform 0.45s var(--ease-editorial);
}

.dossier-backdrop.is-open .dossier-sheet {
  transform: translateY(0);
}

.dossier-handle {
  width: 36px;
  height: 3px;
  background: rgba(245, 240, 230, 0.25);
  border-radius: 2px;
  margin: 0 auto 18px;
}

.dossier-close {
  position: absolute;
  top: 16px;
  right: 18px;
  width: 30px;
  height: 30px;
  border-radius: 50%;
  border: 1px solid rgba(245, 240, 230, 0.2);
  background: transparent;
  color: var(--ink-light);
  cursor: pointer;
}

.dossier-kicker {
  display: block;
  font-size: 10px;
  letter-spacing: 0.22em;
  color: var(--gold);
  margin-bottom: 8px;
}

.dossier-title {
  margin: 0 0 4px;
  font-family: var(--font-serif);
  font-size: 24px;
  font-weight: 500;
  letter-spacing: 0.08em;
}

.dossier-subtitle {
  margin: 0 0 16px;
  font-size: 12px;
  color: rgba(245, 240, 230, 0.65);
}

.dossier-facts {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 10px;
  padding: 12px 0;
  margin-bottom: 14px;
  border-top: 1px solid var(--line-light);
  border-bottom: 1px solid var(--line-light);
}

.dossier-fact-item span {
  display: block;
  font-size: 10px;
  letter-spacing: 0.1em;
  color: rgba(245, 240, 230, 0.5);
  margin-bottom: 2px;
}

.dossier-fact-item strong {
  font-size: 13px;
  font-weight: 400;
  color: var(--gold-bright);
}

.dossier-body {
  margin: 0 0 20px;
  font-size: 13.5px;
  line-height: 1.85;
  color: var(--ink-light-muted);
  font-weight: 300;
}

.stamp-collect-btn {
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  padding: 13px 16px;
  border: 1px solid var(--gold);
  background: rgba(199, 166, 103, 0.12);
  color: var(--gold-bright);
  font-size: 13px;
  letter-spacing: 0.14em;
  cursor: pointer;
  transition: all 0.25s ease;
}

.stamp-collect-btn.is-collected {
  background: var(--vermilion);
  border-color: var(--vermilion);
  color: #f6efe4;
}

.stamp-icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 22px;
  height: 22px;
  border: 1px solid currentColor;
  font-family: var(--font-serif);
  font-size: 11px;
}