:root {
  --ink: #25221c;
  --muted-ink: #625e54;
  --paper: #e8e0cf;
  --panel: #f3ede0;
  --accent: #8b352d;
  --accent-dark: #532a26;
  --line: rgba(37, 34, 28, 0.2);
  --ease: cubic-bezier(0.22, 1, 0.36, 1);
  font-family: "Songti SC", "STSong", "Noto Serif CJK SC", serif;
  color: var(--ink);
  background: var(--paper);
}

* {
  box-sizing: border-box;
}

html,
body {
  width: 100%;
  min-height: 100%;
  margin: 0;
}

body {
  overflow: hidden;
  background:
    radial-gradient(circle at 75% 25%, rgba(255, 255, 255, 0.3), transparent 28%),
    var(--paper);
}

button {
  color: inherit;
  font: inherit;
}

button:focus-visible {
  outline: 1px solid currentColor;
  outline-offset: 5px;
}

.grain {
  position: fixed;
  inset: 0;
  z-index: 50;
  pointer-events: none;
  opacity: 0.14;
  mix-blend-mode: multiply;
  background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 180 180' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='.9' numOctaves='3' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)' opacity='.22'/%3E%3C/svg%3E");
}

.site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 40;
  height: 86px;
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  align-items: center;
  padding: 0 42px;
  border-bottom: 1px solid transparent;
  transition: border-color 500ms ease;
}

body.is-exploring .site-header {
  border-color: var(--line);
}

.brand,
.top-nav button,
.sound-toggle,
.details-button,
.chapter-actions button,
.start-button {
  border: 0;
  background: transparent;
  cursor: pointer;
}

.brand {
  justify-self: start;
  display: inline-flex;
  align-items: center;
  gap: 12px;
  padding: 0;
}

.brand-mark {
  display: grid;
  place-items: center;
  width: 34px;
  aspect-ratio: 1;
  color: var(--panel);
  background: var(--accent);
  border-radius: 50% 50% 46% 48%;
  font-size: 17px;
  line-height: 1;
  transition: background-color 700ms ease;
}

.brand-name {
  font-weight: 600;
  letter-spacing: 0.12em;
}

.top-nav {
  display: flex;
  gap: 34px;
}

.top-nav button {
  position: relative;
  padding: 8px 0;
  color: var(--muted-ink);
  font-family: "PingFang SC", "Microsoft YaHei", sans-serif;
  font-size: 12px;
  letter-spacing: 0.14em;
}

.top-nav button::after {
  content: "";
  position: absolute;
  left: 0;
  right: 100%;
  bottom: 2px;
  height: 1px;
  background: currentColor;
  transition: right 280ms ease;
}

.top-nav button:hover::after {
  right: 0;
}

.sound-toggle {
  justify-self: end;
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 8px 0;
  font-family: "PingFang SC", "Microsoft YaHei", sans-serif;
  font-size: 11px;
  letter-spacing: 0.1em;
}

.sound-bars {
  display: flex;
  align-items: center;
  gap: 2px;
  height: 14px;
}

.sound-bars i {
  display: block;
  width: 1px;
  height: 4px;
  background: currentColor;
  transition: height 180ms ease;
}

.sound-bars i:nth-child(2) {
  height: 9px;
}

.sound-toggle[aria-pressed="true"] .sound-bars i {
  animation: sound-wave 700ms ease-in-out infinite alternate;
}

.sound-toggle[aria-pressed="true"] .sound-bars i:nth-child(2) {
  animation-delay: -240ms;
}

.sound-toggle[aria-pressed="true"] .sound-bars i:nth-child(3) {
  animation-delay: -460ms;
}

@keyframes sound-wave {
  from { height: 3px; }
  to { height: 13px; }
}

#app,
.home-view,
.chapter-view {
  min-height: 100svh;
}

.home-view,
.chapter-view {
  position: absolute;
  inset: 0;
  opacity: 0;
  visibility: hidden;
  transition:
    opacity 700ms ease,
    visibility 700ms;
}

.home-view.is-visible,
.chapter-view.is-visible {
  opacity: 1;
  visibility: visible;
}

.home-view {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: 110px 24px 52px;
  text-align: center;
}

.home-view::before {
  content: "";
  position: absolute;
  inset: 0;
  background:
    linear-gradient(90deg, transparent 49.93%, rgba(37, 34, 28, 0.08) 50%, transparent 50.07%),
    linear-gradient(0deg, transparent 49.93%, rgba(37, 34, 28, 0.05) 50%, transparent 50.07%);
  pointer-events: none;
}

.home-orbit {
  position: absolute;
  inset: 50% auto auto 50%;
  width: min(58vw, 760px);
  aspect-ratio: 1.55;
  transform: translate(-50%, -50%);
  pointer-events: none;
}

.home-orbit i {
  position: absolute;
  inset: 0;
  border: 1px solid rgba(83, 42, 38, 0.14);
  border-radius: 46% 54% 51% 49% / 54% 42% 58% 46%;
  transform: rotate(-5deg);
}

.home-orbit i:nth-child(2) {
  inset: 9%;
  transform: rotate(7deg);
}

.home-orbit i:nth-child(3) {
  inset: 18%;
  transform: rotate(-11deg);
}

.eyebrow {
  margin: 0 0 22px;
  color: var(--accent);
  font-family: "PingFang SC", "Microsoft YaHei", sans-serif;
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 0.22em;
  text-transform: uppercase;
}

.home-view h1 {
  position: relative;
  z-index: 2;
  display: flex;
  align-items: baseline;
  gap: 0.18em;
  margin: 0;
  font-size: clamp(76px, 11vw, 168px);
  font-weight: 500;
  letter-spacing: -0.08em;
  line-height: 0.9;
}

.home-view h1 span:last-child {
  color: var(--accent);
}

.home-lead {
  position: relative;
  margin: 34px 0 0;
  font-size: clamp(18px, 1.7vw, 26px);
  letter-spacing: 0.28em;
}

.home-intro {
  position: relative;
  max-width: 530px;
  margin: 22px auto 30px;
  color: var(--muted-ink);
  font-size: 14px;
  line-height: 2;
  letter-spacing: 0.08em;
}

.start-button {
  position: relative;
  display: inline-flex;
  align-items: center;
  gap: 34px;
  padding: 14px 4px;
  border-bottom: 1px solid var(--ink);
  font-size: 13px;
  letter-spacing: 0.12em;
}

.start-button .arrow {
  font-size: 18px;
  transition: transform 300ms var(--ease);
}

.start-button:hover .arrow {
  transform: translate(4px, -4px);
}

.home-foot {
  position: absolute;
  left: 42px;
  right: 42px;
  bottom: 29px;
  display: grid;
  grid-template-columns: auto 1fr auto;
  align-items: center;
  gap: 16px;
  color: var(--muted-ink);
  font-family: "PingFang SC", "Microsoft YaHei", sans-serif;
  font-size: 9px;
  letter-spacing: 0.18em;
}

.home-line {
  height: 1px;
  background: var(--line);
}

.chapter-view {
  overflow: hidden;
  background: var(--paper);
  transition:
    opacity 700ms ease,
    visibility 700ms,
    background-color 700ms ease;
}

.chapter-wash {
  position: absolute;
  inset: 0;
  opacity: 0.62;
  background:
    radial-gradient(circle at 52% 44%, rgba(255, 255, 255, 0.7), transparent 38%),
    linear-gradient(135deg, color-mix(in srgb, var(--accent) 8%, transparent), transparent 38%);
}

.chapter-meta {
  position: absolute;
  left: 42px;
  top: 132px;
  z-index: 4;
  width: 190px;
}

.chapter-count {
  display: flex;
  align-items: baseline;
  gap: 5px;
  margin-bottom: 54px;
  font-family: "PingFang SC", "Microsoft YaHei", sans-serif;
}

.chapter-count span:first-child {
  color: var(--accent);
  font-size: 28px;
  font-weight: 600;
}

.chapter-count span:last-child {
  color: var(--muted-ink);
  font-size: 10px;
}

.chapter-region {
  margin-bottom: 9px;
  color: var(--accent);
  font-family: "PingFang SC", "Microsoft YaHei", sans-serif;
  font-size: 10px;
  font-weight: 600;
  letter-spacing: 0.16em;
}

.chapter-meta h2 {
  margin: 0;
  font-size: clamp(23px, 2vw, 32px);
  font-weight: 500;
  line-height: 1.25;
  text-wrap: balance;
}

.details-button {
  display: flex;
  justify-content: space-between;
  width: 100%;
  margin-top: 30px;
  padding: 10px 0;
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
  color: var(--muted-ink);
  font-family: "PingFang SC", "Microsoft YaHei", sans-serif;
  font-size: 10px;
  letter-spacing: 0.08em;
}

.chapter-stage {
  --px: 0;
  --py: 0;
  position: absolute;
  inset: 96px 190px 46px 230px;
}

.chapter-verb {
  position: absolute;
  z-index: 0;
  top: 4%;
  left: 50%;
  margin: 0;
  color: color-mix(in srgb, var(--accent) 11%, transparent);
  font-size: min(40vw, 520px);
  font-weight: 600;
  line-height: 0.9;
  transform: translateX(-50%);
  user-select: none;
  transition: opacity 700ms ease;
}

.chapter-stage:not(.is-revealed) .chapter-verb {
  opacity: 0.24;
}

.model-wrap {
  position: absolute;
  z-index: 2;
  top: -3%;
  left: 50%;
  width: min(74vw, 1080px);
  height: 90%;
  transform:
    translateX(calc(-50% + var(--px) * 7px))
    translateY(calc(var(--py) * 4px));
  transition: transform 800ms var(--ease);
}

.model-wrap::before {
  content: "";
  position: absolute;
  z-index: 1;
  inset: 31% 8% 6%;
  opacity: 0.42;
  background:
    linear-gradient(
      90deg,
      transparent,
      color-mix(in srgb, var(--paper) 58%, transparent) 16% 84%,
      transparent
    ),
    repeating-linear-gradient(
      90deg,
      transparent 0 24px,
      color-mix(in srgb, var(--accent) 7%, transparent) 24px 25px
    );
  -webkit-mask-image: linear-gradient(to bottom, transparent, #000 12% 82%, transparent);
  mask-image: linear-gradient(to bottom, transparent, #000 12% 82%, transparent);
  pointer-events: none;
  transition: opacity 500ms ease;
}

.model-wrap.is-revealed::before {
  opacity: 0;
}

.model-wrap.is-changing #building-model,
.model-wrap.is-changing #building-full,
.model-wrap.is-changing canvas,
.model-wrap.is-changing .reveal-hit {
  opacity: 0;
  transform: translateY(-10px) scale(0.965);
}

#building-model,
#building-full {
  position: absolute;
  z-index: 2;
  top: 0;
  left: 0;
  display: block;
  width: 100%;
  height: auto;
  opacity: 1;
  filter: drop-shadow(0 18px 16px rgba(49, 40, 30, 0.16));
  transition:
    opacity 620ms var(--ease),
    transform 800ms var(--ease),
    filter 700ms ease;
}

#building-full {
  z-index: 1;
  opacity: 0;
  filter: drop-shadow(0 24px 22px rgba(49, 40, 30, 0.18));
  transition:
    opacity 720ms var(--ease) 420ms,
    filter 700ms ease;
}

.model-wrap.is-revealed #building-model {
  z-index: 2;
  opacity: 1;
  filter: drop-shadow(0 20px 18px rgba(49, 40, 30, 0.13));
  transform: none;
}

.model-wrap.is-revealed #building-full {
  z-index: 1;
  opacity: 1;
  filter: drop-shadow(0 28px 26px rgba(49, 40, 30, 0.22));
  transform: none;
}

.word-building-canvas {
  position: absolute;
  z-index: 3;
  inset: 0;
  width: 100%;
  height: 100%;
  pointer-events: none;
  transition:
    opacity 360ms ease,
    transform 700ms var(--ease);
}

.reveal-hit {
  --hit-x: 50%;
  --hit-y: 48%;
  position: absolute;
  z-index: 4;
  inset: 0;
  padding: 0;
  border: 0;
  color: var(--ink);
  background: transparent;
  cursor: crosshair;
  transition:
    opacity 320ms ease,
    transform 700ms var(--ease);
}

.reveal-cursor {
  position: absolute;
  left: var(--hit-x);
  top: var(--hit-y);
  width: 44px;
  aspect-ratio: 1;
  border: 1px solid color-mix(in srgb, var(--accent) 55%, transparent);
  border-radius: 50%;
  opacity: 0;
  transform: translate(-50%, -50%) scale(0.65);
  transition:
    opacity 180ms ease,
    transform 320ms var(--ease);
}

.reveal-cursor::before,
.reveal-cursor::after {
  content: "";
  position: absolute;
  left: 50%;
  top: 50%;
  background: var(--accent);
  transform: translate(-50%, -50%);
}

.reveal-cursor::before {
  width: 10px;
  height: 1px;
}

.reveal-cursor::after {
  width: 1px;
  height: 10px;
}

.reveal-hit:hover .reveal-cursor {
  opacity: 1;
  transform: translate(-50%, -50%) scale(1);
}

.reveal-prompt {
  position: absolute;
  left: 50%;
  bottom: 4%;
  display: grid;
  grid-template-columns: auto auto;
  align-items: baseline;
  gap: 12px;
  padding: 7px 12px;
  color: var(--muted-ink);
  border: 1px solid color-mix(in srgb, var(--accent) 18%, transparent);
  background: color-mix(in srgb, var(--paper) 86%, transparent);
  transform: translateX(-50%);
  white-space: nowrap;
  backdrop-filter: blur(5px);
}

.reveal-prompt b {
  color: var(--accent);
  font-family: "PingFang SC", "Microsoft YaHei", sans-serif;
  font-size: 10px;
  letter-spacing: 0.14em;
}

.reveal-prompt small {
  font-family: "PingFang SC", "Microsoft YaHei", sans-serif;
  font-size: 9px;
  letter-spacing: 0.08em;
}

.model-wrap.is-revealed .reveal-hit {
  opacity: 0;
  pointer-events: none;
}

.model-shadow {
  position: absolute;
  z-index: 0;
  left: 18%;
  right: 18%;
  bottom: 8%;
  height: 16px;
  border-radius: 50%;
  opacity: 0;
  background: var(--accent-dark);
  filter: blur(14px);
  transition: opacity 900ms ease 240ms;
}

.model-wrap.is-revealed .model-shadow {
  opacity: 0.24;
}

.story-reveal {
  position: absolute;
  z-index: 3;
  top: 82%;
  left: 50%;
  display: grid;
  grid-template-columns: 76px minmax(0, 1fr) auto;
  align-items: start;
  gap: 22px;
  width: min(62vw, 820px);
  padding: 18px 0 0;
  border-top: 1px solid color-mix(in srgb, var(--accent) 55%, transparent);
  opacity: 0;
  transform: translateX(-50%) translateY(20px);
  pointer-events: none;
  transition:
    transform 850ms var(--ease) 660ms,
    opacity 650ms ease 660ms;
}

.chapter-stage.is-revealed .story-reveal {
  opacity: 1;
  transform: translateX(-50%) translateY(0);
  pointer-events: auto;
}

.story-reveal.is-changing {
  opacity: 0;
  transform: translateX(-50%) translateY(14px);
  transition-delay: 0ms;
}

.story-kicker {
  padding-top: 5px;
  color: var(--accent);
  font-family: "PingFang SC", "Microsoft YaHei", sans-serif;
  font-size: 9px;
  letter-spacing: 0.18em;
  white-space: nowrap;
}

.story-reveal p {
  margin: 0;
  font-size: clamp(14px, 1.18vw, 18px);
  line-height: 1.8;
  letter-spacing: 0.075em;
  text-align: justify;
}

.reset-word-house {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  margin-top: 2px;
  padding: 4px 0 8px;
  border: 0;
  border-bottom: 1px solid currentColor;
  color: var(--accent);
  background: transparent;
  cursor: pointer;
  font-family: "PingFang SC", "Microsoft YaHei", sans-serif;
  font-size: 9px;
  letter-spacing: 0.12em;
  white-space: nowrap;
}

.chapter-actions {
  position: absolute;
  z-index: 4;
  left: 0;
  right: 0;
  top: 50%;
  height: 43px;
  pointer-events: none;
  transform: translateY(-50%);
}

.chapter-actions button {
  position: absolute;
  top: 0;
  display: grid;
  place-items: center;
  width: 43px;
  aspect-ratio: 1;
  border: 1px solid var(--line);
  border-radius: 50%;
  background: color-mix(in srgb, var(--paper) 78%, transparent);
  pointer-events: auto;
  backdrop-filter: blur(8px);
  transition:
    background-color 250ms ease,
    color 250ms ease,
    transform 250ms ease;
}

.chapter-actions [data-action="prev"] {
  left: 42px;
}

.chapter-actions [data-action="next"] {
  right: 42px;
}

.chapter-actions [data-action="prev"]:hover {
  color: var(--panel);
  background: var(--accent);
  transform: translateX(-2px);
}

.chapter-actions [data-action="next"]:hover {
  color: var(--panel);
  background: var(--accent);
  transform: translateX(2px);
}

.progress-rail {
  position: absolute;
  z-index: 4;
  left: 42px;
  right: 42px;
  bottom: 28px;
  height: 1px;
  background: var(--line);
}

.progress-rail span {
  display: block;
  width: 12.5%;
  height: 2px;
  margin-top: -1px;
  background: var(--accent);
  transition:
    width 700ms var(--ease),
    background-color 700ms ease;
}

.gesture-hint {
  position: absolute;
  right: 42px;
  bottom: 35px;
  margin: 0;
  color: var(--muted-ink);
  font-family: "PingFang SC", "Microsoft YaHei", sans-serif;
  font-size: 8px;
  letter-spacing: 0.16em;
}

.panel {
  width: calc(100vw - 48px);
  max-width: none;
  height: calc(100svh - 48px);
  max-height: none;
  margin: 24px;
  padding: 46px 52px;
  color: var(--ink);
  border: 0;
  background:
    radial-gradient(circle at 76% 22%, rgba(255, 255, 255, 0.55), transparent 24%),
    var(--panel);
  box-shadow: 0 26px 90px rgba(37, 34, 28, 0.22);
}

.panel[open] {
  animation: panel-in 480ms var(--ease);
}

.panel::backdrop {
  background: rgba(31, 27, 21, 0.42);
  backdrop-filter: blur(7px);
}

@keyframes panel-in {
  from {
    opacity: 0;
    transform: translateY(24px) scale(0.985);
  }
}

.panel-head {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 40px;
  padding-bottom: 30px;
  border-bottom: 1px solid var(--line);
}

.panel-head .eyebrow {
  margin-bottom: 12px;
}

.panel-head h2 {
  max-width: 750px;
  margin: 0;
  font-size: clamp(27px, 3vw, 48px);
  font-weight: 400;
  letter-spacing: 0.04em;
}

.panel-head > button {
  display: grid;
  place-items: center;
  width: 42px;
  aspect-ratio: 1;
  padding: 0;
  border: 1px solid var(--line);
  border-radius: 50%;
  background: transparent;
  cursor: pointer;
  font-family: sans-serif;
  font-size: 22px;
  font-weight: 200;
}

.index-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  height: calc(100% - 126px);
  overflow: auto;
}

.index-card {
  position: relative;
  display: flex;
  min-height: 250px;
  flex-direction: column;
  align-items: flex-start;
  justify-content: flex-end;
  padding: 22px;
  overflow: hidden;
  border: 0;
  border-right: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
  background: transparent;
  cursor: pointer;
  text-align: left;
}

.index-card:nth-child(4n) {
  border-right: 0;
}

.index-card img {
  position: absolute;
  inset: 8px 8px 72px;
  width: calc(100% - 16px);
  height: calc(100% - 80px);
  object-fit: contain;
  transition: transform 600ms var(--ease);
}

.index-card:hover img {
  transform: translateY(-5px) scale(1.035);
}

.index-card small {
  color: var(--accent);
  font-family: sans-serif;
  font-size: 9px;
  letter-spacing: 0.14em;
}

.index-card strong {
  margin-top: 5px;
  font-size: 18px;
  font-weight: 500;
}

.map-panel-head {
  padding-bottom: 22px;
}

.map-panel-head h2 {
  font-size: clamp(25px, 2.55vw, 42px);
}

.map-head-note {
  margin: 10px 0 0;
  color: var(--muted-ink);
  font-family: sans-serif;
  font-size: 10px;
  letter-spacing: 0.08em;
}

.map-diary-layout {
  display: grid;
  grid-template-columns: minmax(0, 1.72fr) minmax(292px, 0.72fr);
  gap: clamp(18px, 2.1vw, 34px);
  height: calc(100% - 120px);
  padding-top: 20px;
}

.map-board {
  position: relative;
  min-width: 0;
  min-height: 0;
  overflow: hidden;
  border: 1px solid color-mix(in srgb, var(--ink) 18%, transparent);
  background:
    linear-gradient(rgba(46, 41, 33, 0.035) 1px, transparent 1px),
    linear-gradient(90deg, rgba(46, 41, 33, 0.035) 1px, transparent 1px),
    radial-gradient(circle at 26% 20%, rgba(255, 255, 255, 0.74), transparent 28%),
    color-mix(in srgb, var(--paper) 78%, #fff);
  background-size: 42px 42px, 42px 42px, auto, auto;
  box-shadow:
    inset 0 0 70px color-mix(in srgb, var(--paper) 72%, transparent),
    0 18px 40px rgba(42, 35, 26, 0.08);
}

.map-board::after {
  content: "";
  position: absolute;
  inset: 0;
  z-index: 5;
  border: 8px solid color-mix(in srgb, var(--paper) 44%, transparent);
  pointer-events: none;
}

.map-board-caption {
  position: absolute;
  z-index: 4;
  left: 18px;
  top: 15px;
  display: flex;
  align-items: center;
  gap: 12px;
  font-family: sans-serif;
}

.map-board-caption span {
  color: var(--accent);
  font-size: 8px;
  font-weight: 700;
  letter-spacing: 0.18em;
}

.map-board-caption small {
  color: var(--muted-ink);
  font-size: 8px;
  letter-spacing: 0.1em;
}

.map-stage {
  position: absolute;
  inset: 0;
  min-height: 430px;
  overflow: hidden;
}

.map-contours {
  position: absolute;
  inset: 9% 7% 7%;
  opacity: 0.5;
  clip-path: polygon(
    18% 13%,
    38% 4%,
    52% 12%,
    69% 10%,
    77% 20%,
    91% 24%,
    86% 38%,
    96% 48%,
    87% 60%,
    82% 80%,
    70% 88%,
    58% 82%,
    49% 94%,
    39% 79%,
    25% 82%,
    19% 67%,
    6% 57%,
    13% 43%,
    4% 30%
  );
  background:
    repeating-radial-gradient(
      ellipse at 54% 48%,
      rgba(69, 83, 64, 0.07) 0 23px,
      rgba(76, 62, 42, 0.18) 24px 25px,
      transparent 26px 38px
    ),
    color-mix(in srgb, var(--paper) 42%, #b9b99e);
  filter: saturate(0.65);
  transform: rotate(-3deg);
}

.map-contours::after {
  content: "";
  position: absolute;
  left: 19%;
  top: 28%;
  width: 64%;
  height: 44%;
  border-top: 2px dashed rgba(75, 91, 92, 0.3);
  border-radius: 48%;
  transform: rotate(18deg);
}

.map-compass {
  position: absolute;
  right: 19px;
  top: 15px;
  z-index: 4;
  width: 28px;
  padding: 6px 0;
  border: 1px solid color-mix(in srgb, var(--ink) 18%, transparent);
  border-radius: 50%;
  background: color-mix(in srgb, var(--paper) 84%, transparent);
  font-family: sans-serif;
  font-size: 8px;
  line-height: 1.45;
  text-align: center;
}

.map-sticker {
  --tilt: 0deg;
  position: absolute;
  z-index: 3;
  display: grid;
  grid-template-columns: 50px 1fr;
  width: clamp(104px, 9.2vw, 132px);
  min-height: 82px;
  gap: 7px;
  padding: 12px 9px 9px;
  border: 1px solid color-mix(in srgb, var(--point-color) 28%, var(--line));
  color: var(--ink);
  background:
    linear-gradient(145deg, rgba(255, 255, 255, 0.82), transparent 46%),
    color-mix(in srgb, var(--paper) 86%, #fff7df);
  box-shadow:
    0 9px 18px rgba(48, 39, 28, 0.13),
    0 1px 0 rgba(255, 255, 255, 0.8) inset;
  cursor: pointer;
  text-align: left;
  transform: translate(-50%, -50%) rotate(var(--tilt));
  transform-origin: center;
  transition:
    transform 380ms var(--ease),
    box-shadow 380ms var(--ease),
    border-color 250ms ease;
}

.map-sticker::before {
  content: "";
  position: absolute;
  left: 50%;
  top: -7px;
  width: 42px;
  height: 14px;
  background: rgba(178, 152, 100, 0.24);
  box-shadow: 0 1px 2px rgba(60, 45, 28, 0.08);
  transform: translateX(-50%) rotate(-2deg);
}

.map-sticker:hover,
.map-sticker.is-active {
  z-index: 6;
  border-color: var(--point-color);
  box-shadow:
    0 16px 30px rgba(48, 39, 28, 0.2),
    0 0 0 2px color-mix(in srgb, var(--point-color) 14%, transparent);
  transform: translate(-50%, -50%) rotate(0deg) scale(1.055);
}

.map-sticker-figure {
  display: grid;
  place-items: center;
  min-width: 0;
  height: 54px;
}

.map-sticker-figure img {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: contain;
  filter: drop-shadow(0 5px 5px rgba(45, 37, 28, 0.12));
}

.map-sticker-copy {
  display: grid;
  align-content: center;
  min-width: 0;
}

.map-sticker-copy small {
  color: var(--point-color);
  font-family: sans-serif;
  font-size: 7px;
  letter-spacing: 0.08em;
}

.map-sticker-copy strong {
  margin-top: 2px;
  overflow: hidden;
  font-size: clamp(12px, 0.92vw, 15px);
  font-weight: 500;
  line-height: 1.12;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.map-sticker-note {
  grid-column: 1 / -1;
  min-height: 18px;
  overflow: hidden;
  color: var(--muted-ink);
  font-family: sans-serif;
  font-size: 7px;
  line-height: 1.35;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.map-sticker-note::before {
  content: "○";
  margin-right: 4px;
  color: var(--point-color);
}

.map-sticker.has-note .map-sticker-note {
  color: var(--ink);
}

.map-sticker.has-note .map-sticker-note::before {
  content: "●";
}

.map-notebook {
  position: relative;
  display: flex;
  min-width: 0;
  min-height: 0;
  flex-direction: column;
  padding: clamp(20px, 2vw, 30px);
  border: 1px solid color-mix(in srgb, var(--ink) 18%, transparent);
  background:
    repeating-linear-gradient(
      to bottom,
      transparent 0 29px,
      rgba(73, 88, 90, 0.11) 30px 31px
    ),
    linear-gradient(105deg, rgba(255, 255, 255, 0.55), transparent 36%),
    color-mix(in srgb, var(--paper) 72%, #fffdf2);
  box-shadow: 0 18px 40px rgba(42, 35, 26, 0.1);
}

.map-note-tape {
  position: absolute;
  left: 50%;
  top: -8px;
  width: 70px;
  height: 18px;
  background: rgba(173, 140, 85, 0.2);
  transform: translateX(-50%) rotate(1deg);
}

.map-note-building {
  display: grid;
  grid-template-columns: minmax(92px, 0.9fr) minmax(110px, 1fr);
  align-items: center;
  gap: 14px;
  min-height: 118px;
  padding-bottom: 18px;
  border-bottom: 1px solid color-mix(in srgb, var(--ink) 16%, transparent);
}

.map-note-image-wrap {
  display: grid;
  place-items: center;
  height: 100px;
  overflow: hidden;
}

.map-note-image-wrap img {
  display: block;
  width: 118%;
  height: 118%;
  object-fit: contain;
  filter: drop-shadow(0 10px 8px rgba(45, 37, 28, 0.13));
}

#map-note-region {
  color: var(--accent);
  font-family: sans-serif;
  font-size: 8px;
  font-weight: 600;
  letter-spacing: 0.12em;
}

.map-note-building h3 {
  margin: 7px 0 5px;
  font-size: clamp(22px, 2vw, 32px);
  font-weight: 400;
  line-height: 1.05;
}

#map-note-prompt {
  margin: 0;
  color: var(--muted-ink);
  font-size: 11px;
  line-height: 1.6;
}

.map-notebook > label {
  margin-top: 20px;
  color: var(--accent);
  font-family: sans-serif;
  font-size: 9px;
  font-weight: 700;
  letter-spacing: 0.14em;
}

#map-note-input {
  min-height: 118px;
  margin-top: 10px;
  padding: 10px 4px;
  resize: none;
  color: var(--ink);
  border: 0;
  outline: 0;
  background: transparent;
  font-family: "Songti SC", "STSong", "Noto Serif CJK SC", serif;
  font-size: 14px;
  line-height: 2.15;
}

#map-note-input::placeholder {
  color: color-mix(in srgb, var(--muted-ink) 62%, transparent);
}

#map-note-input:focus {
  box-shadow: inset 3px 0 0 var(--accent);
}

.map-note-meta {
  display: flex;
  justify-content: space-between;
  gap: 14px;
  margin-top: 6px;
  color: var(--muted-ink);
  font-family: sans-serif;
  font-size: 8px;
  letter-spacing: 0.06em;
}

#map-note-status {
  text-align: right;
}

.map-note-actions {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 8px;
  margin-top: auto;
  padding-top: 18px;
}

.map-note-actions button {
  min-height: 38px;
  padding: 8px 10px;
  border: 1px solid var(--accent);
  color: var(--panel);
  background: var(--accent);
  cursor: pointer;
  font-family: sans-serif;
  font-size: 9px;
  letter-spacing: 0.08em;
  transition:
    color 240ms ease,
    background 240ms ease;
}

.map-note-actions button:last-child {
  color: var(--accent);
  background: transparent;
}

.map-note-actions button:hover {
  color: var(--accent);
  background: transparent;
}

.map-note-actions button:last-child:hover {
  color: var(--panel);
  background: var(--accent);
}

.details-layout {
  display: grid;
  grid-template-columns: minmax(0, 1.4fr) minmax(390px, 0.95fr);
  gap: clamp(30px, 3.2vw, 64px);
  height: calc(100% - 116px);
  padding-top: 22px;
}

.details-diagram {
  display: block;
  min-width: 0;
  min-height: 0;
  margin: 0;
}

.details-image-wrap {
  position: relative;
  height: 100%;
  min-height: 0;
  overflow: hidden;
  border: 1px solid color-mix(in srgb, var(--accent) 20%, transparent);
  background:
    linear-gradient(90deg, transparent 49.9%, rgba(37, 34, 28, 0.035) 50%, transparent 50.1%),
    color-mix(in srgb, var(--paper) 62%, white);
}

.details-image-wrap::after {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  box-shadow: inset 0 0 68px color-mix(in srgb, var(--paper) 82%, transparent);
}

#details-image {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center;
  mix-blend-mode: multiply;
  transform: scale(1.2);
}

.details-figure-index {
  position: absolute;
  z-index: 2;
  left: 16px;
  top: 14px;
  padding: 5px 8px;
  color: var(--accent);
  background: color-mix(in srgb, var(--panel) 82%, transparent);
  font-family: "PingFang SC", "Microsoft YaHei", sans-serif;
  font-size: 8px;
  letter-spacing: 0.14em;
  backdrop-filter: blur(6px);
}

.details-copy-head {
  padding: 0 0 clamp(16px, 1.8vh, 24px);
  border-bottom: 1px solid var(--line);
}

.details-copy-head p {
  margin: 0;
  color: var(--accent);
  font-size: clamp(15px, 1.1vw, 19px);
  letter-spacing: 0.08em;
}

.details-copy-head small {
  display: block;
  margin-top: 7px;
  color: var(--muted-ink);
  font-family: "PingFang SC", "Microsoft YaHei", sans-serif;
  font-size: 8px;
  letter-spacing: 0.06em;
}

.details-steps {
  display: block;
  margin: 0;
  padding: 0;
  list-style: none;
}

.details-steps li {
  display: grid;
  grid-template-columns: 28px 1fr;
  gap: 12px;
  min-width: 0;
  padding: clamp(11px, 1.35vh, 17px) 0;
  border-bottom: 1px solid var(--line);
}

.details-steps li:last-child {
  padding-right: 0;
}

.details-steps li > span {
  color: var(--accent);
  font-family: "PingFang SC", "Microsoft YaHei", sans-serif;
  font-size: 9px;
  font-weight: 600;
}

.details-steps strong {
  display: block;
  margin-bottom: 4px;
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 0.08em;
}

.details-steps p {
  margin: 0;
  color: var(--muted-ink);
  font-size: clamp(10px, 0.68vw, 12px);
  line-height: 1.6;
}

.details-reading {
  position: relative;
  display: grid;
  align-content: start;
  min-width: 0;
  padding-left: clamp(22px, 2.4vw, 46px);
  overflow: auto;
  border-left: 1px solid var(--line);
}

.details-list {
  width: 100%;
  margin: 0;
}

.details-list > div {
  display: grid;
  grid-template-columns: 78px 1fr;
  gap: 18px;
  padding: clamp(11px, 1.35vh, 17px) 0;
  border-bottom: 1px solid var(--line);
}

.details-list dt {
  color: var(--accent);
  font-family: sans-serif;
  font-size: 10px;
  font-weight: 600;
  letter-spacing: 0.12em;
}

.details-list dd {
  margin: 0;
  font-size: clamp(12px, 0.92vw, 16px);
  line-height: 1.65;
}

.details-note {
  position: static;
  margin: clamp(15px, 1.8vh, 24px) 0 0;
  color: var(--muted-ink);
  font-family: sans-serif;
  font-size: 9px;
  letter-spacing: 0.08em;
}

@media (max-width: 980px) {
  .site-header {
    height: 70px;
    padding: 0 20px;
  }

  .brand-name,
  .sound-label {
    display: none;
  }

  .top-nav {
    gap: 20px;
  }

  .chapter-meta {
    top: 94px;
    left: 22px;
    width: 160px;
  }

  .chapter-count {
    margin-bottom: 28px;
  }

  .chapter-stage {
    inset: 80px 80px 48px 170px;
  }

  .chapter-actions {
    right: 0;
  }

  .chapter-actions [data-action="prev"] {
    left: 22px;
  }

  .chapter-actions [data-action="next"] {
    right: 22px;
  }

  .progress-rail {
    left: 22px;
    right: 22px;
  }

  .gesture-hint {
    right: 22px;
  }

  .index-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .index-card:nth-child(4n) {
    border-right: 1px solid var(--line);
  }

  .index-card:nth-child(2n) {
    border-right: 0;
  }

  .map-panel {
    overflow: auto;
  }

  .map-diary-layout {
    display: grid;
    height: auto;
  }

  .map-board {
    min-height: 560px;
  }

  .map-notebook {
    min-height: 470px;
  }

  .details-panel {
    overflow: auto;
  }

  .details-layout {
    display: block;
    height: auto;
  }

  .details-diagram {
    display: block;
  }

  .details-image-wrap {
    height: auto;
    aspect-ratio: 3 / 2;
  }

  .details-reading {
    margin-top: 34px;
    padding: 24px 0 0;
    overflow: visible;
    border-top: 1px solid var(--line);
    border-left: 0;
  }

  .details-note {
    position: static;
    margin-top: 34px;
  }
}

@media (max-width: 700px) {
  .home-view {
    padding-top: 90px;
  }

  .home-view h1 {
    flex-direction: column;
    gap: 0;
    font-size: clamp(70px, 27vw, 118px);
    line-height: 0.85;
  }

  .home-lead {
    margin-top: 24px;
    font-size: 15px;
    letter-spacing: 0.2em;
  }

  .home-intro {
    width: min(88vw, 430px);
    font-size: 12px;
  }

  .home-foot {
    left: 20px;
    right: 20px;
  }

  .chapter-meta {
    top: 86px;
    left: 20px;
    right: 20px;
    width: auto;
  }

  .chapter-count {
    position: absolute;
    right: 0;
    margin: 0;
  }

  .chapter-region {
    margin-bottom: 5px;
  }

  .chapter-meta h2 {
    font-size: 23px;
  }

  .details-button {
    width: 150px;
    margin-top: 12px;
    padding: 7px 0;
  }

  .chapter-stage {
    inset: 168px 10px 48px;
  }

  .chapter-verb {
    top: 11%;
    font-size: 68vw;
  }

  .model-wrap {
    top: 0;
    width: 108vw;
    height: 70%;
  }

  .reveal-prompt {
    bottom: 1%;
    grid-template-columns: 1fr;
    gap: 2px;
    padding: 6px 10px;
    text-align: center;
  }

  .story-reveal {
    top: 72%;
    grid-template-columns: 1fr;
    width: 91vw;
    gap: 10px;
    padding-top: 14px;
  }

  .story-reveal p {
    font-size: 14px;
    line-height: 1.85;
  }

  .reset-word-house {
    justify-self: end;
  }

  .story-kicker {
    display: none;
  }

  .chapter-actions {
    top: auto;
    left: 0;
    right: 0;
    bottom: 44px;
    height: 38px;
    transform: none;
  }

  .chapter-actions button {
    width: 38px;
  }

  .chapter-actions [data-action="prev"] {
    left: 20px;
  }

  .chapter-actions [data-action="next"] {
    right: 20px;
  }

  .gesture-hint {
    display: none;
  }

  .panel {
    width: calc(100vw - 20px);
    height: calc(100svh - 20px);
    margin: 10px;
    padding: 26px 20px;
  }

  .panel-head {
    gap: 14px;
    padding-bottom: 22px;
  }

  .panel-head h2 {
    font-size: 25px;
  }

  .index-grid {
    grid-template-columns: 1fr;
    height: calc(100% - 108px);
  }

  .index-card {
    min-height: 210px;
    border-right: 0 !important;
  }

  .map-panel-head h2 {
    font-size: 23px;
  }

  .map-head-note {
    max-width: 82%;
    line-height: 1.55;
  }

  .map-diary-layout {
    gap: 18px;
    padding-top: 16px;
  }

  .map-board {
    min-height: 610px;
  }

  .map-stage {
    min-height: 610px;
  }

  .map-sticker {
    width: 106px;
    grid-template-columns: 43px 1fr;
    padding: 11px 7px 8px;
  }

  .map-sticker-figure {
    height: 48px;
  }

  .map-note-building {
    grid-template-columns: 108px 1fr;
  }

  .map-note-actions {
    grid-template-columns: 1fr;
  }

  .details-layout {
    display: block;
    padding-top: 16px;
  }

  .details-steps {
    display: block;
  }

  .details-steps li,
  .details-steps li:last-child {
    grid-template-columns: 30px 1fr;
    padding: 13px 0;
    border-bottom: 1px solid var(--line);
  }

  .details-list {
    margin-top: 0;
  }

  .details-list > div {
    grid-template-columns: 80px 1fr;
    gap: 18px;
    padding: 18px 0;
  }

  .details-list dd {
    font-size: 15px;
  }

  .details-note {
    margin-bottom: 10px;
  }
}

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