:root {
  --paper: #F4F1EA;
  --card: #FFFEFA;
  --ink: #1F2A26;
  --green: #234A3C;
  --night: #1B2433;
  --door: #A5522B;
  --star: #68549A;
  --deity: #3F5A7A;
  --stem: #6B6A2E;
  --ok: #2F6B4F;
  --ok-bg: #E6F1EA;
  --bad: #A8442F;
  --bad-bg: #FBEAE4;
  --line: rgba(31, 42, 38, 0.12);
  --max: 1180px;
}
* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: "PingFang TC", "Heiti TC", "Noto Sans CJK TC", sans-serif;
  line-height: 1.55;
}
button, input, select { font-family: inherit; color: inherit; }
h1, h2, h3 { font-family: "Songti TC", "Songti SC", "Noto Serif CJK TC", serif; }
button:focus-visible, a:focus-visible, input:focus-visible, select:focus-visible { outline: 3px solid var(--deity); outline-offset: 3px; }
.family-select { flex: 1 1 240px; min-width: 0; }
.family-select select { max-width: 100%; width: 100%; border: 1px solid var(--line); background: var(--card); padding: 8px; font-size: 14px; }
.wrap { max-width: var(--max); margin: 0 auto; padding: 0 20px 64px; }
.site-head { background: var(--night); color: #F4F1EA; }
.site-head h1 { margin: 0; font-size: 36px; font-weight: 600; letter-spacing: 0.04em; }
.head-row { display: flex; justify-content: space-between; align-items: flex-end; gap: 16px; padding-top: 28px; padding-bottom: 22px; }
.eyebrow { margin: 0 0 4px; letter-spacing: 0.18em; font-size: 12px; opacity: 0.72; }
.text-link { color: #F4F1EA; }
.stats { display: grid; grid-template-columns: repeat(4, 1fr); gap: 12px; margin: 22px 0 14px; }
.stat { background: var(--card); border: 1px solid var(--line); padding: 12px 14px; }
.stat b { display: block; font-size: 26px; color: var(--green); font-weight: 600; }
.stat span { font-size: 13px; }
.toolbar { display: flex; flex-wrap: wrap; gap: 8px; align-items: center; margin-bottom: 10px; }
.search { flex: 1 1 220px; }
.search input { width: 100%; background: var(--card); border: 1px solid var(--line); padding: 8px 10px; font-size: 15.5px; }
.chips { display: flex; flex-wrap: wrap; gap: 6px; }
.chip, .scene-nav button, .mode-row button, .q-nav button, .panel-nav button, .opt, .confirm-actions button {
  background: var(--card);
  border: 1px solid var(--line);
  padding: 6px 10px;
  cursor: pointer;
  font-size: 14px;
}
.chip.is-on, .mode-row button[aria-pressed="true"] { background: var(--green); color: #F4F1EA; border-color: var(--green); }
.continue-line, .status-line, .empty, .scene-meta { font-size: 14.5px; }
.continue-line a { color: var(--green); }
.card-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px; margin-top: 12px; }
.scene-card {
  display: flex; flex-direction: column; text-align: left;
  background: var(--card); border: 1px solid var(--line); padding: 0; cursor: pointer; color: inherit;
}
.scene-card .thumb {
  aspect-ratio: 2 / 1; background-color: #ddd6c8; background-repeat: no-repeat;
  background-size: cover; background-position: center;
}
.scene-card .body { padding: 12px 14px 14px; }
.scene-card h3 { margin: 0 0 6px; font-size: 18px; font-weight: 600; }
.scene-card p { margin: 0; font-size: 13.5px; }
.badges { display: flex; flex-wrap: wrap; gap: 6px; margin-top: 8px; }
.badge { display: inline-block; font-size: 12px; padding: 2px 7px; border: 1px solid var(--line); background: #F7F4EE; }
.badge.kind-ai { color: var(--deity); }
.badge.kind-orig { color: var(--door); }
#scene { padding-top: 18px; }
#scene h2 { font-size: 28px; margin: 12px 0 4px; font-weight: 600; }
.scene-nav, .mode-row, .q-nav, .panel-nav, .confirm-actions { display: flex; flex-wrap: wrap; gap: 8px; align-items: center; }
.panels { display: grid; grid-template-columns: repeat(3, 1fr); gap: 12px; margin-top: 14px; }
.panel, .gallery-panels figure { margin: 0; min-width: 0; }
.panel-frame {
  width: 100%; aspect-ratio: 2 / 3; background-color: #d9d2c4;
  background-repeat: no-repeat; position: relative;
}
.panel-caption {
  position: absolute; left: 0; right: 0; top: 0;
  background: rgba(27, 36, 51, 0.78); color: #F4F1EA;
  font-size: 13.5px; padding: 6px 8px; overflow: hidden;
}
.panel-caption.is-open { max-height: none; overflow: auto; }
.panel-caption > div { display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden; }
.panel-caption.is-open > div { display: block; overflow: visible; }
.panel-caption button {
  display: flex; align-items: center; box-sizing: border-box;
  min-height: 44px; margin-top: 2px; background: transparent; color: #F4F1EA;
  border: 0; padding: 8px 4px; cursor: pointer; text-decoration: underline; font-size: 14px;
}
.panel-nav { margin: 8px 0 4px; }
.panel-steps { display: flex; gap: 6px; }
.learn-layout { display: grid; grid-template-columns: 440px 1fr; gap: 18px; margin-top: 16px; align-items: start; }
#plate { background: var(--card); border: 1px solid var(--line); padding: 12px; }
.plate-head { font-size: 13.5px; margin-bottom: 8px; }
.plate-head p { margin: 2px 0; }
.layer-toggles { display: flex; flex-wrap: wrap; gap: 6px; margin: 8px 0 4px; }
.layer-hint { margin: 0 0 8px; font-size: 12px; opacity: 0.78; }
.advanced-plate { margin: 4px 0 8px; }
.advanced-plate summary { cursor: pointer; min-height: 44px; display: flex; align-items: center; }
.hint-bar { display: flex; flex-wrap: wrap; gap: 6px; margin: 8px 0; }
.hint-panel { margin: 8px 0; padding: 10px 12px; border-left: 3px solid var(--green); background: #EEF2EB; font-size: 14.5px; white-space: pre-line; }
.jump-row { display: flex; flex-wrap: wrap; gap: 8px; margin-top: 8px; }
.mode-note { margin: 8px 0 0; font-size: 13.5px; }
.grid9 { display: grid; grid-template-columns: repeat(3, 1fr); gap: 6px; }
.cell {
  border: 1px solid var(--line); background: #FFFEFA; padding: 4px; text-align: left;
  cursor: pointer; min-height: 92px; font-size: 12px; line-height: 1.35;
}
.cell.is-selected { outline: 2px solid var(--green); }
.cell .pname { font-weight: 600; }
.cell .door { color: var(--door); }
.cell .deity { color: var(--deity); }
.cell .stem { color: var(--stem); }
.cell [data-layer="九星"] { color: var(--star); }
.term-legend { display: flex; flex-wrap: wrap; gap: 8px; align-items: center; margin: 8px 0; font-size: 13px; }
.term-swatch { border-bottom: 2px solid currentColor; }
.term-swatch.is-door { color: var(--door); }
.term-swatch.is-star { color: var(--star); }
.term-swatch.is-god { color: var(--deity); }
.term-trigger {
  font: inherit; font-size: inherit; line-height: inherit; color: inherit;
  background: transparent; border: 0; padding: 0; margin: 0; cursor: pointer;
  border-bottom: 1px dashed currentColor;
}
.term-trigger.term-door { color: var(--door); }
.term-trigger.term-star { color: var(--star); }
.term-trigger.term-god { color: var(--deity); }
.term-heading.term-door { color: var(--door); }
.term-heading.term-star { color: var(--star); }
.term-heading.term-god { color: var(--deity); }
.term-dialog {
  border: 1px solid var(--line); background: var(--card); color: var(--ink);
  width: min(440px, calc(100vw - 24px)); max-height: min(78vh, 640px); padding: 0;
  overflow-wrap: anywhere; box-shadow: 0 16px 48px rgba(27, 36, 51, 0.18);
}
.term-dialog::backdrop { background: rgba(27, 36, 51, 0.45); }
.term-dialog-body { overflow: auto; max-height: min(78vh, 640px); padding: 12px 16px 18px; }
.term-dialog h3 { margin: 0 36px 8px 0; font-size: 22px; }
.term-dialog h4 { margin: 12px 0 4px; font-size: 15px; }
.term-dialog p { margin: 4px 0; font-size: 15px; }
.term-dialog .term-context-label { font-size: 13px; color: var(--green); margin-top: 8px; }
.term-context { border-left: 3px solid var(--line); padding-left: 10px; }
.term-dialog summary { cursor: pointer; min-height: 44px; display: list-item; padding-top: 10px; }
.term-close {
  float: right; position: sticky; top: 0; min-width: 44px; min-height: 44px; margin: 0 0 8px 8px;
  background: var(--card); border: 1px solid var(--line); cursor: pointer;
}
.term-dialog.is-fallback {
  position: fixed; z-index: 30; inset: auto 12px 12px 12px; margin: auto;
  display: block; top: 12px;
}
.term-backdrop {
  position: fixed; inset: 0; background: rgba(27, 36, 51, 0.45); z-index: 29;
}
.cell-detail { margin-top: 8px; font-size: 13.5px; background: #F7F4EE; padding: 8px 10px; }
#question { margin-top: 12px; }
.prompt { font-size: 17px; margin: 8px 0; }
.skill { font-size: 13.5px; color: var(--green); }
.options { display: flex; flex-direction: column; gap: 14px; }
.option-item { border: 1px solid var(--line); background: #F7F4EE; padding: 6px; }
.opt { text-align: left; font-size: 15.5px; padding: 10px 12px; width: 100%; }
.reset-progress {
  margin-left: auto; border: 0; background: transparent; color: var(--bad);
  min-height: 44px; padding: 10px 8px; cursor: pointer; font-size: 14px;
}
.opt[disabled] { cursor: default; }
.opt.is-selected { outline: 2px solid var(--deity); background: #EEF1F4; }
.question-stages { margin-top: 10px; }
.chip[disabled], .q-nav button[disabled], .scene-nav button[disabled] { opacity: 0.45; cursor: default; }
.reading-brief, .phase-bar, #notes, #followup { margin-top: 12px; }
.reading-brief p, #notes p, #followup p, .chain-step p { margin: 4px 0; }
.reading-brief, #notes, #followup, #score, #epilogue { background: var(--card); border: 1px solid var(--line); padding: 12px 14px; }
.phase-bar { display: flex; flex-wrap: wrap; gap: 6px; }
.phase { font-size: 13px; padding: 4px 8px; border: 1px solid var(--line); background: var(--card); }
.phase.is-current { border-color: var(--green); color: var(--green); }
#notes label, .followup-status { display: block; font-size: 14.5px; margin-top: 8px; }
#notes summary { cursor: pointer; min-height: 44px; display: flex; align-items: center; font-size: 15.5px; }
.followup-debrief { border-top: 1px solid var(--line); margin-top: 8px; padding-top: 8px; }
#notes textarea {
  display: block; width: 100%; min-height: 72px; margin-top: 4px;
  border: 1px solid var(--line); background: #FFFEFA; padding: 8px; font: inherit; font-size: 16px;
}
.note-frozen { background: #F7F4EE; padding: 8px 10px; margin-top: 8px; }
.note-hint { font-size: 13.5px; }
.chain-step { border-top: 1px solid var(--line); margin-top: 8px; padding-top: 8px; }
.chain-k { color: var(--green); }
.followup h3, #notes h3 { font-size: 16px; margin: 12px 0 4px; font-weight: 600; }
.gallery-note { margin: -4px 0 10px; font-size: 13.5px; color: var(--deity); }
.opt.is-correct { background: var(--ok-bg); border-color: var(--ok); color: var(--ok); }
.opt.is-wrong { background: var(--bad-bg); border-color: var(--bad); color: var(--bad); }
.mark { font-weight: 700; margin-right: 6px; }
.feedback, .explain, .evidence { font-size: 14px; margin: 6px 0 0; }
.verdict { font-size: 16px; margin: 8px 0; }
.verdict.ok { color: var(--ok); }
.verdict.bad { color: var(--bad); }
#score, #epilogue { margin-top: 12px; }
.confirm { position: fixed; inset: 0; background: rgba(27, 36, 51, 0.45); display: grid; place-items: center; padding: 20px; }
.confirm[hidden], [hidden] { display: none !important; }
.confirm-card { background: var(--card); max-width: 420px; padding: 18px 18px 14px; border: 1px solid var(--line); }
.visually-hidden { position: absolute; width: 1px; height: 1px; overflow: hidden; clip: rect(0 0 0 0); }
.gallery { display: grid; gap: 28px; padding-top: 22px; }
.gallery-item { background: var(--card); border: 1px solid var(--line); padding: 16px; min-width: 0; }
.gallery-item h2 { margin: 0 0 12px; font-size: 23px; }
.gallery-panels { display: grid; grid-template-columns: repeat(3, 1fr); gap: 0; }
.gallery-panels figcaption { padding: 10px 12px; font-size: 14px; }
@media (max-width: 860px) {
  .site-head h1 { font-size: 26px; }
  #scene h2 { font-size: 22px; }
  .stats { grid-template-columns: repeat(2, 1fr); }
  .card-grid { grid-template-columns: 1fr; }
  .panels { display: block; }
  .panels .panel { display: none; }
  .panels .panel.is-active { display: block; }
  .learn-layout { display: flex; flex-direction: column; }
  .quiz { order: -1; }
  #question, #plate { scroll-margin-top: 64px; }
  .hint-bar .chip { min-height: 44px; }
  .jump-row { position: sticky; top: 0; z-index: 3; background: var(--paper); padding: 6px 0; }
  .cell { min-height: 72px; font-size: 13px; }
  .plate-head { font-size: 12.5px; line-height: 1.45; }
  .layer-hint { font-size: 12px; line-height: 1.45; margin: 6px 0; }
  .panel-nav { position: sticky; top: 0; background: var(--paper); z-index: 2; padding: 6px 0; }
  .gallery-item { padding: 8px; }
  .gallery-item h2 { font-size: 20px; }
  .gallery-panels { grid-template-columns: 1fr; gap: 12px; }
  .gallery-panels figcaption { padding: 8px 4px; }
}
@media (min-width: 861px) {
  .panel-nav { display: none; }
}
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  * { animation: none !important; transition: none !important; }
}

.hypothesis-fold { margin: 8px 0; font-size: 14px; }
.hypothesis-fold summary { cursor: pointer; min-height: 44px; display: flex; align-items: center; color: var(--green); }
.hypothesis-fold p { margin: 6px 0; }

.advanced-plate summary::before, .hypothesis-fold summary::before, .note-fold summary::before { content: "▸"; margin-right: 8px; }
.advanced-plate[open] > summary::before, .hypothesis-fold[open] > summary::before, .note-fold[open] > summary::before { content: "▾"; }

.header-links { display: flex; gap: 12px; flex-wrap: wrap; align-items: center; }