/* ============================================================
 * 星际能量漫游 · 样式
 * 配色：温润深蓝 · 青绿 · 暖白 · 少量香槟金
 * 深色用于衬托光，不代表幽暗
 * ============================================================ */

:root {
  --ink-900: #070f1c;
  --ink-800: #0b1424;
  --ink-700: #10203a;
  --ink-600: #17304f;
  --teal: #4fb3a6;
  --teal-deep: #2f6f6a;
  --gold: #e6c98a;
  --gold-soft: #f2dfb6;
  --warm-white: #fdf8f0;
  --paper: #fbf6ee;
  --paper-line: #e8dfd0;
  --text-dark: #33302b;
  --text-mid: #6b6255;
  --text-soft: #8b8172;
  --text-light: #eef3fb;
  --text-light-mid: #b9c7dc;
  --radius: 16px;
  --shadow-soft: 0 18px 50px rgba(4, 10, 20, 0.45);
  --ease-soft: cubic-bezier(0.22, 0.61, 0.36, 1);
}

* { box-sizing: border-box; }

/* 尊重界面显隐状态，避免 flex 布局让隐藏的提示层遮住星图。 */
[hidden] { display: none !important; }

html, body {
  margin: 0;
  height: 100%;
  overflow: hidden;
  background: var(--ink-800);
  color: var(--text-light);
  font-family: -apple-system, BlinkMacSystemFont, "PingFang SC", "Hiragino Sans GB",
    "Microsoft YaHei", "Noto Sans SC", sans-serif;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

body { position: relative; }

/* ===================== 3D 舞台 ===================== */

#stage {
  position: fixed;
  inset: 0;
  z-index: 0;
  isolation: isolate;
}

#canvas {
  display: block;
  width: 100%;
  height: 100%;
  opacity: 0;
  transition: opacity 1.6s var(--ease-soft);
}
#canvas.ready { opacity: 1; }

#vignette {
  position: absolute;
  inset: 0;
  pointer-events: none;
  background:
    radial-gradient(120% 78% at 50% 14%, rgba(120, 168, 220, 0.16), transparent 62%),
    radial-gradient(100% 70% at 50% 100%, rgba(12, 26, 44, 0.55), transparent 60%);
  mix-blend-mode: screen;
}

/* ===================== 星体标签 ===================== */

.labels {
  position: fixed;
  inset: 0;
  z-index: 6;
  pointer-events: none;
}

.star-label {
  position: absolute;
  left: 0;
  top: 0;
  transform: translate(-50%, -50%);
  pointer-events: auto;
  cursor: pointer;
  border: 0;
  background: transparent;
  padding: 0;
  color: var(--text-light);
  font-family: inherit;
  text-align: center;
  opacity: 0;
  transition: opacity 0.9s var(--ease-soft);
  will-change: transform;
}
.star-label.visible { opacity: 1; }

.star-label .dot {
  display: block;
  width: 6px;
  height: 6px;
  margin: 0 auto 9px;
  border-radius: 50%;
  background: var(--gold-soft);
  box-shadow: 0 0 12px 3px rgba(230, 201, 138, 0.55);
}

.star-label .name {
  display: block;
  font-size: 15px;
  letter-spacing: 0.06em;
  font-weight: 500;
  text-shadow: 0 2px 14px rgba(4, 10, 20, 0.9), 0 0 26px rgba(4, 10, 20, 0.7);
}

.star-label .meta {
  display: block;
  margin-top: 4px;
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--text-light-mid);
  text-shadow: 0 2px 12px rgba(4, 10, 20, 0.9);
}

.star-label .seen {
  display: block;
  margin-top: 6px;
  font-size: 11px;
  letter-spacing: 0.1em;
  color: rgba(230, 201, 138, 0.85);
  opacity: 0;
  transition: opacity 0.4s;
}
.star-label.seen .seen { opacity: 1; }

.star-label:hover .name,
.star-label:focus-visible .name { color: var(--gold-soft); }

.star-label:focus-visible { outline: 2px solid var(--gold); outline-offset: 6px; border-radius: 8px; }

/* ===================== 通用按钮 ===================== */

.btn {
  font-family: inherit;
  font-size: 15px;
  letter-spacing: 0.06em;
  border-radius: 999px;
  border: 1px solid transparent;
  padding: 12px 26px;
  cursor: pointer;
  transition: transform 0.25s var(--ease-soft), background 0.25s, border-color 0.25s, opacity 0.25s;
}
.btn:active { transform: translateY(1px); }
.btn:focus-visible { outline: 2px solid var(--gold); outline-offset: 3px; }

.btn-primary {
  background: linear-gradient(180deg, rgba(253, 248, 240, 0.98), rgba(238, 228, 208, 0.94));
  color: #2c2a25;
  box-shadow: 0 12px 34px rgba(230, 201, 138, 0.24);
}
.btn-primary:hover { background: #fffdf8; }

.btn-ghost {
  background: rgba(238, 243, 251, 0.07);
  border-color: rgba(238, 243, 251, 0.26);
  color: var(--text-light);
}
.btn-ghost:hover { background: rgba(238, 243, 251, 0.14); border-color: rgba(238, 243, 251, 0.42); }

.btn-quiet {
  background: transparent;
  border-color: var(--paper-line);
  color: var(--text-mid);
}
.btn-quiet:hover { border-color: #cfc3ad; color: var(--text-dark); }

.btn-lg { padding: 15px 44px; font-size: 16px; }
.btn-sm { padding: 9px 18px; font-size: 13.5px; }

/* ===================== 遮罩层 ===================== */

.overlay {
  position: fixed;
  inset: 0;
  z-index: 40;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 28px;
  background: radial-gradient(90% 70% at 50% 40%, rgba(16, 32, 58, 0.72), rgba(7, 15, 28, 0.9));
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  opacity: 0;
  transition: opacity 0.7s var(--ease-soft);
}
.overlay.shown { opacity: 1; }

/* 开场 */
.intro {
  background: radial-gradient(80% 60% at 50% 44%, rgba(23, 48, 79, 0.86), rgba(7, 15, 28, 0.96));
}
.intro-inner { text-align: center; max-width: 520px; }

.intro-kicker {
  margin: 0 0 18px;
  font-size: 12px;
  letter-spacing: 0.42em;
  color: var(--gold);
  text-indent: 0.42em;
}
.intro-title {
  margin: 0 0 14px;
  font-size: clamp(30px, 6vw, 46px);
  font-weight: 500;
  letter-spacing: 0.16em;
  text-indent: 0.16em;
  color: var(--warm-white);
  text-shadow: 0 0 44px rgba(230, 201, 138, 0.34);
}
.intro-subtitle {
  margin: 0 0 22px;
  font-size: 14px;
  letter-spacing: 0.2em;
  color: var(--text-light-mid);
}
.intro-lead {
  margin: 0 auto 32px;
  max-width: 400px;
  font-size: 15px;
  line-height: 1.9;
  color: var(--text-light-mid);
}
.intro-tip {
  margin: 22px 0 0;
  font-size: 12.5px;
  letter-spacing: 0.04em;
  color: rgba(185, 199, 220, 0.62);
}

/* 全貌操作条 */
.overview-bar {
  position: fixed;
  left: 50%;
  bottom: max(38px, env(safe-area-inset-bottom, 0px) + 26px);
  transform: translateX(-50%);
  z-index: 20;
  text-align: center;
  opacity: 0;
  transition: opacity 0.9s var(--ease-soft);
  pointer-events: none;
}
.overview-bar.shown { opacity: 1; }
.overview-bar.shown .btn { pointer-events: auto; }

.overview-hint {
  margin: 0 0 16px;
  font-size: 13.5px;
  letter-spacing: 0.14em;
  color: var(--text-light-mid);
  text-shadow: 0 2px 14px rgba(4, 10, 20, 0.9);
}
.overview-actions { display: flex; gap: 12px; justify-content: center; flex-wrap: wrap; }

/* 飞行中 */
.flying {
  position: fixed;
  left: 50%;
  bottom: max(34px, env(safe-area-inset-bottom, 0px) + 22px);
  transform: translateX(-50%);
  z-index: 22;
  display: flex;
  align-items: center;
  gap: 14px;
  opacity: 0;
  transition: opacity 0.6s var(--ease-soft);
}
.flying.shown { opacity: 1; }

.flying-text {
  margin: 0;
  font-size: 13px;
  letter-spacing: 0.16em;
  color: var(--text-light-mid);
  text-shadow: 0 2px 14px rgba(4, 10, 20, 0.9);
}

/* ===================== 阅读面板 ===================== */

.reading {
  position: fixed;
  z-index: 30;
  background: var(--paper);
  color: var(--text-dark);
  display: flex;
  flex-direction: column;
  box-shadow: var(--shadow-soft);
  opacity: 0;
  transition: opacity 0.75s var(--ease-soft), transform 0.75s var(--ease-soft);
}

.reading-scroll {
  flex: 1;
  overflow-y: auto;
  overscroll-behavior: contain;
  -webkit-overflow-scrolling: touch;
  padding: 40px 40px 28px;
}

.eyebrow {
  margin: 0 0 12px;
  font-size: 12px;
  letter-spacing: 0.24em;
  color: var(--teal-deep);
}
.reading-title {
  margin: 0 0 14px;
  font-size: 25px;
  font-weight: 550;
  letter-spacing: 0.04em;
  color: #2b2823;
}
.reading-welcome {
  margin: 0;
  padding-left: 14px;
  border-left: 2px solid var(--gold);
  font-size: 15.5px;
  line-height: 1.85;
  color: #5d5548;
}

/* 投影（画面） */
.vision { margin: 28px 0 26px; }
.vision-frame {
  position: relative;
  background: #efe7da;
  border-radius: 12px;
  overflow: hidden;
}
#r-image {
  display: block;
  width: 100%;
  height: auto;
  opacity: 0;
  transition: opacity 1.1s var(--ease-soft);
}
#r-image.shown { opacity: 1; }
.vision-fallback {
  padding: 46px 22px;
  text-align: center;
  font-size: 13.5px;
  line-height: 1.8;
  color: var(--text-soft);
}
.vision figcaption {
  margin-top: 12px;
  font-size: 12.5px;
  letter-spacing: 0.08em;
  color: var(--text-soft);
}

/* 讲述 */
.reading-story p {
  margin: 0 0 17px;
  font-size: 16px;
  line-height: 2;
  color: #3b3730;
}
.reading-story p:last-child { margin-bottom: 0; }

/* 展开的详细说明 */
.reading-detail { margin: 32px 0 8px; padding-top: 24px; border-top: 1px solid var(--paper-line); }
.detail-body { margin-top: 20px; }
.detail-body p {
  margin: 0 0 15px;
  font-size: 14.5px;
  line-height: 1.95;
  color: #55503f;
}

/* 底部操作 */
.reading-actions {
  flex-shrink: 0;
  padding: 18px 40px calc(18px + env(safe-area-inset-bottom, 0px));
  background: linear-gradient(180deg, rgba(251, 246, 238, 0.86), var(--paper) 46%);
  border-top: 1px solid var(--paper-line);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 14px;
  flex-wrap: wrap;
}
.reading-actions-minor { display: flex; gap: 10px; }

/* ===================== 目录 / 回顾 ===================== */

.picker-inner, .review-inner {
  width: min(560px, 100%);
  max-height: 88vh;
  overflow-y: auto;
  text-align: center;
}
.picker-kicker, .review-kicker {
  margin: 0 0 24px;
  font-size: 12px;
  letter-spacing: 0.36em;
  text-indent: 0.36em;
  color: var(--gold);
}
.picker-list, .review-list {
  list-style: none;
  margin: 0 0 28px;
  padding: 0;
  display: grid;
  gap: 12px;
  text-align: left;
}
.picker-list button {
  width: 100%;
  text-align: left;
  font-family: inherit;
  cursor: pointer;
  border-radius: 14px;
  border: 1px solid rgba(238, 243, 251, 0.18);
  background: rgba(238, 243, 251, 0.06);
  color: var(--text-light);
  padding: 17px 21px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  font-size: 15.5px;
  letter-spacing: 0.04em;
  transition: background 0.25s, border-color 0.25s;
}
.picker-list button:hover { background: rgba(238, 243, 251, 0.13); border-color: rgba(238, 243, 251, 0.4); }
.picker-list .pl-meta { font-size: 12.5px; color: var(--text-light-mid); letter-spacing: 0.1em; }
.picker-list .pl-seen { color: var(--gold-soft); font-size: 11.5px; letter-spacing: 0.14em; }

.review-lead {
  margin: 0 0 26px;
  font-size: 14.5px;
  line-height: 1.9;
  color: var(--text-light-mid);
}
.review-list li {
  border-radius: 14px;
  border: 1px solid rgba(238, 243, 251, 0.14);
  background: rgba(238, 243, 251, 0.05);
  padding: 18px 22px;
}
.review-list .rv-name {
  display: block;
  margin-bottom: 8px;
  font-size: 12px;
  letter-spacing: 0.2em;
  color: var(--gold);
}
.review-list .rv-line {
  display: block;
  font-size: 15.5px;
  line-height: 1.86;
  color: var(--warm-white);
}

/* ===================== 声音 ===================== */

.sound {
  position: fixed;
  z-index: 36;
  top: max(22px, env(safe-area-inset-top, 0px) + 14px);
  right: max(22px, env(safe-area-inset-right, 0px) + 14px);
}
.btn-sound {
  display: flex;
  align-items: center;
  gap: 9px;
  padding: 9px 17px;
  font-size: 13px;
  letter-spacing: 0.1em;
  border-radius: 999px;
  border: 1px solid rgba(238, 243, 251, 0.24);
  background: rgba(11, 20, 36, 0.5);
  color: var(--text-light);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
}
.btn-sound:hover { border-color: rgba(238, 243, 251, 0.44); }
.btn-sound[aria-pressed="true"] {
  border-color: rgba(230, 201, 138, 0.62);
  color: var(--gold-soft);
}
.sound-icon { font-size: 14px; }

/* ===================== 降级 ===================== */

.fallback {
  position: fixed;
  inset: 0;
  z-index: 34;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 28px;
  background: radial-gradient(80% 60% at 50% 40%, rgba(23, 48, 79, 0.8), rgba(7, 15, 28, 0.95));
}
.fallback-inner { width: min(460px, 100%); text-align: center; }
.fallback-title { margin: 0 0 10px; font-size: 19px; letter-spacing: 0.08em; }
.fallback-text { margin: 0 0 24px; font-size: 14px; line-height: 1.85; color: var(--text-light-mid); }

/* ===================== 电脑：左右分栏阅读 ===================== */

@media (min-width: 900px) {
  .reading {
    top: 0;
    right: 0;
    height: 100%;
    width: min(600px, 46vw);
    border-radius: 0;
    transform: translateX(38px);
  }
  .reading.shown { transform: translateX(0); }

  /* 电脑上投影已在宇宙中显现，面板内不再重复显示图片 */
  .reading .vision { display: none; }
  .reading-scroll { padding: 54px 54px 30px; }
  .reading-actions { padding: 20px 54px 26px; }
}

@media (max-width: 899px) {
  .reading {
    left: 0;
    right: 0;
    bottom: 0;
    height: 88vh;
    border-radius: 22px 22px 0 0;
    transform: translateY(30px);
  }  .reading.shown { transform: translateY(0); }
  .reading-scroll { padding: 28px 22px 22px; }
  .reading-title { font-size: 21px; }
  .reading-story p { font-size: 15.5px; line-height: 1.98; }
  .reading-actions { padding: 14px 22px calc(16px + env(safe-area-inset-bottom, 0px)); }
  .reading-actions .btn-primary { flex: 1; }
  .sound { top: max(16px, env(safe-area-inset-top, 0px) + 10px); right: 16px; }
  .btn-sound { padding: 8px 14px; }
  .sound-label { display: none; }
  .intro-lead { font-size: 14.5px; }
  .overview-bar { left: 20px; right: 20px; transform: none; }
  .overview-actions .btn { flex: 1; }
}

/* 横屏手机：收窄阅读面板，上方留出空间看见星体与画面；竖图限制高度，避免要滚很久 */
@media (max-width: 899px) and (orientation: landscape) {
  .reading { height: 64vh; }
  .reading-scroll { padding: 20px 26px 18px; }
  #r-image { max-height: 54vh; width: auto; max-width: 100%; margin: 0 auto; }
}

/* ===================== 本地文件方式打开的提示 ===================== */

.protocol-note {
  position: fixed;
  left: 50%;
  bottom: max(14px, env(safe-area-inset-bottom, 0px) + 10px);
  transform: translateX(-50%) translateY(10px);
  z-index: 50;
  width: min(560px, 92vw);
  padding: 10px 18px;
  border-radius: 14px;
  background: rgba(11, 20, 36, 0.86);
  border: 1px solid rgba(230, 201, 138, 0.4);
  color: var(--gold-soft);
  font-size: 12.5px;
  line-height: 1.7;
  text-align: center;
  opacity: 0;
  transition: opacity 0.6s var(--ease-soft), transform 0.6s var(--ease-soft);
}
.protocol-note.shown { opacity: 1; transform: translateX(-50%) translateY(0); }

/* ===================== 减少动态 ===================== */

@media (prefers-reduced-motion: reduce) {
  * { transition-duration: 0.01ms !important; animation-duration: 0.01ms !important; }
}

/* 面板显示状态与交互同步。 */
.reading.shown { opacity: 1; }
.overlay:not(.shown), .reading:not(.shown), .flying:not(.shown) { pointer-events: none; }
.star-label:not(.visible) { visibility: hidden; pointer-events: none; }
body.static-mode .reading .vision { display: block; }