:root {
  color-scheme: dark;
  --ink: #08090c;
  --human: #c8894d;
  --underworld: #3fa6a0;
  --gold: #d6b266;
  --gold-bright: #f0dca6;
  --cinnabar: #9e3b32;
  --paper: #ece5d3;
  --paper-dim: rgba(236, 229, 211, 0.68);
  --paper-faint: rgba(236, 229, 211, 0.4);
  --line: rgba(214, 178, 102, 0.3);
  --xaro: #e8c37e;
  --enchi: #c9b0ef;
  --font-display: "Noto Serif SC", "Songti SC", "STSong", serif;
  --font-body: "Noto Serif SC", "Songti SC", "PingFang SC", serif;
  --ease: cubic-bezier(0.22, 0.61, 0.28, 1);
  --ease-soft: cubic-bezier(0.25, 0.1, 0.25, 1);
  --space-unit: 0.25rem;
  --content-width: 34rem;
  --color-primary: var(--gold);
  --color-background: var(--ink);
  --color-surface: #121318;
  --color-text: var(--paper);
  --color-muted-text: var(--paper-dim);
  --color-border: var(--line);
  --color-focus: var(--gold);
  --radius-sm: 0.375rem;
  --radius-md: 0.75rem;
  --radius-lg: 1rem;
}

* { box-sizing: border-box; }

html {
  background: var(--ink);
  color: var(--paper);
  font-family: var(--font-body);
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
}

body {
  margin: 0;
  min-height: 100dvh;
  background: var(--ink);
  overflow-x: hidden;
}

button { font: inherit; color: inherit; border: 0; background: none; cursor: pointer; }
a { color: inherit; }
:focus-visible { outline: 2px solid var(--gold); outline-offset: 3px; }

.skip-link {
  position: fixed; left: 1rem; top: 1rem; transform: translateY(-240%);
  z-index: 120; background: var(--ink); color: var(--gold);
  padding: 0.5rem 0.9rem; border: 1px solid var(--line); border-radius: 999px;
  text-decoration: none; font-size: 0.85rem;
}
.skip-link:focus { transform: translateY(0); }

/* ============ 全局固定背景舞台（连续溶解，无断层） ============ */
#bg-stage {
  position: fixed; inset: 0; z-index: 0; overflow: hidden; background: var(--ink);
}
.bg-layer {
  position: absolute; inset: -4%;
  background-size: cover; background-position: center;
  opacity: 0; transform: scale(1.12);
  transition: opacity 1.7s var(--ease-soft);
  will-change: opacity, transform;
}
.bg-layer.is-active { opacity: 1; animation: kenburns 18s var(--ease-soft) forwards; }
@keyframes kenburns {
  from { transform: scale(1.12) translateY(0); }
  to   { transform: scale(1.2) translateY(-1.6%); }
}
#bg-veil {
  position: fixed; inset: 0; z-index: 1; pointer-events: none;
  background:
    radial-gradient(130% 90% at 50% 8%, rgba(8,9,12,0.15), rgba(8,9,12,0.62) 88%),
    linear-gradient(to bottom, rgba(8,9,12,0.5), rgba(8,9,12,0.12) 30%, rgba(8,9,12,0.55) 78%, rgba(8,9,12,0.92));
}
#bg-grain {
  position: fixed; inset: -50%; z-index: 2; pointer-events: none; opacity: 0.05;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='120' height='120'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='2'/%3E%3C/filter%3E%3Crect width='120' height='120' filter='url(%23n)' opacity='0.9'/%3E%3C/svg%3E");
  animation: grain 0.6s steps(2) infinite;
}
@keyframes grain {
  0% { transform: translate(0,0); } 50% { transform: translate(-2%,1.5%); } 100% { transform: translate(1.5%,-1%); }
}
#embers { position: fixed; inset: 0; z-index: 3; pointer-events: none; }

/* 顶部滚动进度细线 */
#progress {
  position: fixed; top: 0; left: 0; height: 1.5px; width: 100%;
  transform-origin: 0 50%; transform: scaleX(0);
  background: linear-gradient(90deg, var(--underworld), var(--gold-bright));
  z-index: 60; box-shadow: 0 0 10px rgba(214,178,102,0.7);
}

/* ============ 顶部控制 ============ */
.controls {
  position: fixed; top: 0; left: 0; right: 0; z-index: 50;
  display: flex; justify-content: space-between; align-items: center;
  padding: calc(0.85rem + env(safe-area-inset-top)) 1.15rem 0.85rem;
  background: linear-gradient(to bottom, rgba(8,9,12,0.7), rgba(8,9,12,0));
  pointer-events: none;
}
.controls > * { pointer-events: auto; }
.brand-mini {
  font-family: var(--font-display); letter-spacing: 0.4em; padding-left: 0.4em;
  font-size: 0.8rem; color: var(--gold); opacity: 0.85;
}
.controls-right { display: flex; align-items: center; gap: 0.6rem; }

.lang-switch {
  display: flex; align-items: center; gap: 0.15rem;
  border: 1px solid var(--line); border-radius: 999px; overflow: hidden;
  background: rgba(8,9,12,0.35); backdrop-filter: blur(8px);
}
.lang-switch button {
  font-size: 0.72rem; letter-spacing: 0.1em; padding: 0.42rem 0.62rem;
  color: var(--paper-faint); transition: color 0.3s, background 0.3s;
}
.lang-switch button.is-on { color: #1a1308; background: linear-gradient(180deg,var(--gold-bright),var(--gold)); }

.skip-btn {
  font-size: 0.76rem; letter-spacing: 0.14em; color: var(--paper-dim);
  border: 1px solid var(--line); padding: 0.44rem 0.95rem; border-radius: 999px;
  text-decoration: none; background: rgba(8,9,12,0.35); backdrop-filter: blur(8px);
  transition: color 0.3s, border-color 0.3s;
}
.skip-btn:active { color: var(--gold); border-color: var(--gold); }

.sound-btn {
  position: relative; width: 2.35rem; height: 2.35rem; border-radius: 50%;
  border: 1px solid var(--line); background: rgba(8,9,12,0.35);
  backdrop-filter: blur(8px); display: grid; place-items: center;
  color: var(--paper-dim); transition: color 0.35s, border-color 0.35s, box-shadow 0.35s;
}
.sound-btn svg { width: 1.05rem; height: 1.05rem; }
.sound-btn.is-on {
  color: var(--gold-bright); border-color: var(--gold);
  box-shadow: 0 0 0 1px rgba(214,178,102,0.4), 0 0 20px rgba(214,178,102,0.28) inset, 0 0 16px rgba(214,178,102,0.25);
}
.sound-btn .bars { display: none; gap: 2px; align-items: flex-end; height: 15px; }
.sound-btn .bars i { width: 2px; background: var(--gold-bright); border-radius: 1px; animation: eq 0.9s ease-in-out infinite; }
.sound-btn .bars i:nth-child(1){ height: 5px; animation-delay: -0.2s; }
.sound-btn .bars i:nth-child(2){ height: 12px; animation-delay: -0.5s; }
.sound-btn .bars i:nth-child(3){ height: 8px; animation-delay: -0.1s; }
.sound-btn.is-on .ic-mute { display: none; }
.sound-btn.is-on .bars { display: flex; }
@keyframes eq { 0%,100%{ transform: scaleY(0.4);} 50%{ transform: scaleY(1);} }

/* ============ 章节（透明，靠全局背景连续） ============ */
.scene {
  position: relative; z-index: 6;
  min-height: 118dvh;
  display: flex; flex-direction: column; justify-content: center;
}
.scene-content {
  position: sticky; top: 0; min-height: 100dvh;
  display: flex; flex-direction: column; justify-content: flex-end;
  width: min(var(--content-width), 100%); margin: 0 auto;
  padding: 0 1.9rem calc(5rem + env(safe-area-inset-bottom));
}
.reveal { opacity: 0; transform: translateY(34px); filter: blur(6px);
  transition: opacity 1.15s var(--ease), transform 1.15s var(--ease), filter 1.15s var(--ease); }
.scene.is-active .reveal { opacity: 1; transform: translateY(0); filter: blur(0); }
.scene.is-active .d1 { transition-delay: 0.1s; }
.scene.is-active .d2 { transition-delay: 0.32s; }
.scene.is-active .d3 { transition-delay: 0.54s; }
.scene.is-active .d4 { transition-delay: 0.76s; }
.scene.is-active .d5 { transition-delay: 0.98s; }

.chapter {
  font-family: var(--font-display); font-size: 0.74rem; letter-spacing: 0.52em;
  padding-left: 0.52em; color: var(--gold); margin: 0 0 1rem;
}
.scene-title {
  font-family: var(--font-display); font-weight: 700;
  font-size: clamp(2.1rem, 8.5vw, 3rem); line-height: 1.2; letter-spacing: 0.14em;
  margin: 0 0 1.5rem;
  text-shadow: 0 2px 30px rgba(0,0,0,0.6);
}
.narration { margin: 0; max-width: 30rem; }
.narration p {
  margin: 0 0 0.95rem; font-size: clamp(0.99rem, 3.9vw, 1.1rem);
  line-height: 2.12; letter-spacing: 0.055em; color: var(--paper);
  text-shadow: 0 1px 18px rgba(0,0,0,0.75);
}
.narration p:last-child { margin-bottom: 0; }

/* ============ 入口黑场 ============ */
.scene-enter { min-height: 100dvh; }
.scene-enter .scene-content { justify-content: center; text-align: center; padding-bottom: 0; }
.enter-inner { width: 100%; }
.enter-en { font-family: var(--font-display); letter-spacing: 0.62em; padding-left: 0.62em;
  font-size: 0.82rem; color: var(--gold); opacity: 0.72; margin: 0; }
.enter-title {
  font-family: var(--font-display); font-weight: 700;
  font-size: clamp(3.6rem, 18vw, 5.8rem); letter-spacing: 0.2em; padding-left: 0.2em;
  margin: 1.5rem 0 0.7rem;
  background: linear-gradient(180deg, var(--gold-bright), var(--gold) 58%, #8f6f38);
  -webkit-background-clip: text; background-clip: text; color: transparent;
  filter: drop-shadow(0 0 40px rgba(214,178,102,0.22));
}
.enter-sub { color: var(--paper-dim); letter-spacing: 0.32em; padding-left: 0.32em;
  font-size: 0.82rem; margin: 0 0 3.2rem; }
.enter-actions { display: flex; flex-direction: column; gap: 0.9rem; align-items: center; }
.btn-primary {
  font-family: var(--font-display); letter-spacing: 0.32em; padding-left: 0.32em;
  font-size: 1.02rem; color: #1a1308;
  background: linear-gradient(180deg, var(--gold-bright), var(--gold));
  padding: 1rem 2.7rem; border-radius: 999px;
  box-shadow: 0 10px 40px rgba(214,178,102,0.3), 0 0 0 1px rgba(255,240,200,0.25) inset;
  min-width: 15.5rem; transition: transform 0.4s var(--ease), box-shadow 0.4s;
}
.btn-primary:active { transform: scale(0.97); }
.btn-ghost { letter-spacing: 0.26em; padding-left: 0.26em; font-size: 0.84rem; color: var(--paper-dim); padding: 0.5rem 1rem; }
.enter-note { margin-top: 2.6rem; font-size: 0.72rem; color: var(--paper-faint);
  letter-spacing: 0.12em; line-height: 2; }

/* ============ 选角：全屏双大立绘 ============ */
.scene-choose { min-height: 130dvh; }
.choose-stage {
  position: sticky; top: 0; min-height: 100dvh;
  display: flex; flex-direction: column; justify-content: flex-end;
  overflow: hidden;
}
.choose-head {
  position: absolute; z-index: 8; top: calc(5.2rem + env(safe-area-inset-top)); left: 0; right: 0; text-align: center;
}
.choose-head .chapter { margin: 0; }
.standees { position: absolute; inset: 0; z-index: 5; display: flex; align-items: stretch; overflow: hidden; }
.standee {
  position: relative; flex: 1; height: 100%; padding: 0; margin: 0; overflow: hidden;
  background-size: cover; background-repeat: no-repeat; background-position: center 22%;
  filter: brightness(0.55) saturate(0.9);
  transition: flex 0.7s var(--ease), filter 0.7s var(--ease);
}
.standee.xaro { background-image: url("assets/standee_xaro.jpg"); }
.standee.enchi { background-image: url("assets/standee_enchi.jpg"); }
.standee::after {
  content: ""; position: absolute; inset: 0; z-index: 3;
  background: linear-gradient(to top, rgba(8,9,12,0.92), rgba(8,9,12,0.3) 42%, rgba(8,9,12,0.55));
}
.standee.is-picked, .standee:active { flex: 1.35; filter: brightness(1) saturate(1.1); }
.standees.has-pick .standee:not(.is-picked) { flex: 0.72; filter: brightness(0.3) saturate(0.7); }
.standee-glow { position: absolute; inset: auto 0 0 0; height: 60%; opacity: 0; transition: opacity 0.7s; z-index: 2; }
.standee.xaro .standee-glow { background: radial-gradient(60% 70% at 50% 100%, rgba(232,195,126,0.28), transparent 70%); }
.standee.enchi .standee-glow { background: radial-gradient(60% 70% at 50% 100%, rgba(150,110,220,0.3), transparent 70%); }
.standee.is-picked .standee-glow { opacity: 1; }

.standee-info {
  position: absolute; z-index: 5; left: 0; right: 0; bottom: 16.5rem;
  text-align: center; transform: translateY(10px); opacity: 0.4;
  transition: opacity 0.6s, transform 0.6s var(--ease);
  pointer-events: none;
}
.standee.is-picked .standee-info { opacity: 1; transform: translateY(0); }
.standee-name { display: block; font-family: var(--font-display); font-size: clamp(1.7rem, 7vw, 2.5rem);
  letter-spacing: 0.24em; padding-left: 0.24em; margin: 0; text-shadow: 0 2px 24px rgba(0,0,0,0.9); }
.standee.xaro .standee-name { color: var(--xaro); }
.standee.enchi .standee-name { color: var(--enchi); }
.standee-en { display: block; font-size: 0.7rem; letter-spacing: 0.4em; padding-left: 0.4em;
  color: var(--paper-faint); margin-top: 0.35rem; }

.choose-bottom {
  position: absolute; z-index: 9; left: 0; right: 0; bottom: 0; text-align: center;
  padding: 2.6rem 1.4rem calc(1.7rem + env(safe-area-inset-bottom));
  background: linear-gradient(to top, rgba(8,9,12,0.97) 28%, rgba(8,9,12,0.78) 62%, transparent);
}
.guide-line {
  max-width: 30rem; margin: 0 auto 1rem;
  font-size: 0.94rem; line-height: 1.8; letter-spacing: 0.04em; color: var(--paper);
  opacity: 0; transform: translateY(10px);
  transition: opacity 0.7s var(--ease) 0.15s, transform 0.7s var(--ease) 0.15s;
  text-shadow: 0 1px 14px rgba(0,0,0,0.9);
}
.choose-stage[data-state="loading"] .guide-line,
.choose-stage[data-state="complete"] .guide-line { opacity: 1; transform: translateY(0); }
.btn-choose {
  min-width: 16rem; padding: 0.82rem 2.2rem; font-size: 0.95rem; letter-spacing: 0.24em;
  margin-bottom: 0.9rem; opacity: 0; transform: translateY(8px);
  transition: opacity 0.6s var(--ease) 0.1s, transform 0.6s var(--ease) 0.1s;
}
.choose-stage[data-state="complete"] .btn-choose { opacity: 1; transform: translateY(0); }
.choose-hint { font-size: 0.76rem; letter-spacing: 0.3em; padding-left: 0.3em; color: var(--paper-faint); margin: 0; }

@media (min-width: 860px) {
  :root { --content-width: 44rem; }
  .standee.is-picked, .standee:hover { flex: 1.4; filter: brightness(1) saturate(1.1); }
  .standees.has-pick .standee:not(.is-picked) { flex: 0.66; }
  .standee-info { bottom: 13rem; }
  .guide-line { max-width: 34rem; font-size: 1rem; line-height: 1.85; }
}

@media (max-width: 640px) {
  .brand-mini { display: none; }
  .controls { padding: calc(0.55rem + env(safe-area-inset-top)) 0.65rem 0.55rem; }
  .controls-right { gap: 0.35rem; }
  .skip-btn { padding: 0.34rem 0.65rem; font-size: 0.68rem; letter-spacing: 0.06em; }
  .sound-btn { width: 2.05rem; height: 2.05rem; }
  .lang-switch button { padding: 0.32rem 0.48rem; font-size: 0.66rem; }
  .standees { inset: 3.4rem 0 0; }
  .standee { background-size: auto 100%; background-position: center top; }
  .standee-info { bottom: 13.5rem; }
  .choose-head { top: calc(4.6rem + env(safe-area-inset-top)); }
  .standee-name { font-size: 1.5rem; }
  .guide-line { font-size: 0.84rem; line-height: 1.7; max-width: 21rem; }
  .btn-choose { min-width: 13rem; padding: 0.75rem 1.5rem; font-size: 0.85rem; }
  .choose-head .chapter { font-size: 0.64rem; letter-spacing: 0.38em; padding-left: 0.38em; }
  .choose-bottom { padding: 2.2rem 1rem calc(1.5rem + env(safe-area-inset-bottom)); }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { animation-duration: 0.01ms !important; animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important; }
  .bg-layer.is-active { transform: scale(1.12); }
  #bg-grain { display: none; }
}