/* 解剖工坊 · 样式（手机 / 平板 / 电脑通用） */
:root {
  --ink: #2f2a27;
  --muted: #8d847c;
  --canvas: #f7f0e7;
  --paper: rgba(255, 251, 244, 0.82);
  --line: rgba(117, 91, 70, 0.18);
  --coral: #eb7c6b;
  --lavender: #8d6bcc;
  --sage: #769d74;
  --shadow: 0 18px 48px rgba(87, 62, 43, 0.06);
  --font-serif: "Songti SC", "STSong", "SimSun", "Noto Serif CJK SC", "Source Han Serif SC", Georgia, serif;
  --font-sans: "PingFang SC", "Microsoft YaHei", "Noto Sans CJK SC", "Source Han Sans SC", system-ui, sans-serif;
  --organ-accent: #ee7c6a;
}

* { box-sizing: border-box; }

html { background: #e9ddd0; -webkit-text-size-adjust: 100%; }

body {
  margin: 0;
  min-width: 320px;
  background:
    radial-gradient(circle at 48% 18%, rgba(255, 255, 255, 0.96), transparent 34%),
    linear-gradient(135deg, #f7f1e8, #fdf9f2 48%, #f2e9dd);
  color: var(--ink);
  font-family: var(--font-sans);
  font-size: 14px;
  -webkit-font-smoothing: antialiased;
}

button, input { font: inherit; }
button { color: inherit; }
button:focus-visible, input:focus-visible, canvas:focus-visible { outline: 2px solid #8b6fc4; outline-offset: 3px; }
[hidden] { display: none !important; }

.app-shell { min-height: 100vh; padding: 18px 20px 20px; max-width: 1680px; margin: 0 auto; }

/* ------------------------------------------------------------- 顶栏 --- */
.topbar {
  height: 62px;
  display: flex;
  align-items: center;
  gap: 16px;
}
.brand {
  display: flex; align-items: baseline; gap: 10px;
  border: 0; padding: 0; background: transparent; cursor: pointer; text-align: start;
}
.brand strong { font: 500 clamp(24px, 2.4vw, 36px)/1 var(--font-serif); letter-spacing: -0.02em; white-space: nowrap; }
.brand sup { color: var(--coral); font: 400 12px var(--font-sans); }
.brand em { color: var(--lavender); font-style: italic; font-size: 12px; white-space: nowrap; }

.search-box {
  margin-inline-start: auto;
  width: min(100%, 260px); height: 42px; padding: 0 16px;
  display: flex; align-items: center; gap: 9px;
  border: 1px solid var(--line); border-radius: 999px;
  background: rgba(255, 255, 255, 0.3); color: var(--muted);
}
.search-box input { width: 100%; border: 0; outline: 0; background: transparent; color: var(--ink); font-size: 12px; }
.search-box input::placeholder { color: #a49b93; }

.library-trigger {
  display: none; align-items: center; gap: 7px; height: 40px; padding: 0 14px;
  border: 1px solid var(--line); border-radius: 999px; background: rgba(255, 255, 255, 0.35); cursor: pointer; font-size: 12px;
}

/* --------------------------------------------------------- 工作区 --- */
.workspace {
  margin-top: 10px;
  display: grid;
  grid-template-columns: 252px minmax(0, 1fr) 330px;
  gap: 16px;
  align-items: stretch;
}
.organ-library, .viewer-shell, .info-panel {
  border: 1px solid var(--line); border-radius: 24px; background: var(--paper);
  box-shadow: var(--shadow), inset 0 1px 0 rgba(255, 255, 255, 0.75);
}

/* 器官库 */
.organ-library { padding: 15px 13px 13px; display: flex; flex-direction: column; min-height: 0; max-height: 660px; }
.panel-heading { display: flex; align-items: center; justify-content: space-between; padding: 0 5px 10px; }
.panel-heading > span, .info-kicker, .info-panel h2 {
  text-transform: uppercase; letter-spacing: 0.13em; font-size: 10px; font-weight: 600;
}
.mobile-close { display: none; border: 1px solid var(--line); background: rgba(255,255,255,.4); width: 30px; height: 30px; border-radius: 9px; place-items: center; cursor: pointer; }
.organ-list { display: flex; flex-direction: column; gap: 4px; overflow: auto; scrollbar-width: none; }
.organ-list::-webkit-scrollbar { width: 0; }
.organ-item {
  width: 100%; text-align: start; min-height: 66px;
  display: grid; grid-template-columns: 46px 1fr; align-items: center; gap: 10px;
  padding: 7px 9px; border: 1px solid transparent; border-radius: 15px; background: transparent; cursor: pointer;
}
.organ-item.active {
  background: rgba(253, 234, 226, 0.72);
  border-color: rgba(238, 124, 106, 0.35);
  box-shadow: 0 8px 20px rgba(195, 91, 70, 0.07);
}
.organ-glyph {
  width: 44px; height: 44px; border-radius: 50%; display: grid; place-items: center; overflow: hidden;
  background: radial-gradient(circle at 35% 28%, #fff, #f7e4dd);
  box-shadow: inset 0 0 0 1px rgba(121, 86, 67, 0.07);
}
.organ-glyph img { width: 100%; height: 100%; object-fit: cover; mix-blend-mode: multiply; transform: scale(1.12); }
.organ-item b { display: block; font: 500 16px/1.15 var(--font-serif); }
.organ-item small { display: block; margin-top: 3px; color: var(--muted); font-size: 10px; }
.organ-library blockquote { display: none; }

/* 查看器 */
.viewer-shell {
  position: relative; overflow: hidden; min-width: 0; height: 620px;
  background: radial-gradient(circle at 55% 45%, rgba(255,255,255,.92), rgba(255,250,242,.72) 45%, rgba(246,236,224,.7)), var(--paper);
}
.viewer-shell::after { content: ""; position: absolute; inset: 0; pointer-events: none; box-shadow: inset 0 0 90px rgba(124, 82, 51, 0.04); }
.viewer-glow {
  position: absolute; width: 400px; height: 400px; left: 50%; top: 46%; transform: translate(-50%, -50%);
  border-radius: 50%; background: var(--organ-accent); opacity: 0.06; filter: blur(72px); transition: background 0.5s ease;
}
.three-mount { position: absolute; inset: 0; }
.three-mount canvas { width: 100%; height: 100%; display: block; touch-action: none; }

.viewer-tools {
  position: absolute; inset-inline-start: 16px; top: 50%; z-index: 3; transform: translateY(-50%);
  width: 60px; padding: 7px 5px; display: flex; flex-direction: column; gap: 2px;
  border: 1px solid var(--line); border-radius: 20px;
  background: rgba(253, 250, 244, 0.84); backdrop-filter: blur(18px); box-shadow: 0 12px 30px rgba(75, 54, 40, 0.08);
}
.tool-button {
  height: 54px; border: 0; border-radius: 12px; background: transparent; cursor: pointer;
  display: flex; flex-direction: column; align-items: center; justify-content: center; gap: 4px;
  font: 500 9px/1 var(--font-serif); color: var(--muted);
}
.tool-button:hover { background: rgba(117, 91, 70, 0.06); color: var(--ink); }
.tool-button.active { color: var(--coral); background: rgba(238, 124, 106, 0.09); }

.tip-note {
  position: absolute; inset-inline-end: 16px; top: 16px; z-index: 2; width: 150px;
  padding: 12px 15px; transform: rotate(-4deg); background: #fff2c9;
  box-shadow: 0 7px 13px rgba(93, 69, 43, 0.13); color: #534a43;
}
.tip-note span { display: flex; align-items: center; color: var(--lavender); font: italic 12px/1 var(--font-serif); }
.tip-note p { margin: 7px 0 0; font: 500 13px/1.55 var(--font-serif); }

.auto-rotate {
  position: absolute; inset-inline-end: 16px; bottom: 15px; z-index: 4;
  display: flex; align-items: center; gap: 8px; padding: 8px 10px 8px 12px;
  border: 1px solid var(--line); border-radius: 13px; background: rgba(255, 252, 247, 0.9);
  box-shadow: 0 5px 14px rgba(65, 45, 32, 0.08); cursor: pointer; font: 500 10px var(--font-serif); color: var(--muted);
}
.switch { width: 29px; height: 17px; padding: 2px; border-radius: 99px; background: #c8c2bb; transition: background 0.2s; }
.switch i { display: block; width: 13px; height: 13px; border-radius: 50%; background: #fff; box-shadow: 0 1px 4px rgba(0,0,0,.17); transition: margin 0.2s; }
.switch.on { background: #70a9cb; }
.switch.on i { margin-inline-start: 12px; }
.view-caption {
  position: absolute; inset-inline-start: 92px; bottom: 17px; display: flex; flex-direction: column; gap: 2px;
  color: var(--muted); font-size: 9px; text-transform: uppercase; letter-spacing: 0.1em;
}
.view-caption strong { color: var(--ink); font: 500 13px var(--font-serif); text-transform: none; letter-spacing: 0; }

.model-loader {
  position: absolute; inset: 0; z-index: 6; display: grid; place-content: center; justify-items: center; gap: 8px;
  background: rgba(251, 246, 238, 0.45); backdrop-filter: blur(4px); text-align: center;
}
.model-loader strong { font: 500 17px var(--font-serif); }
.model-loader span { color: var(--muted); font-size: 10px; }
.loader-orbit { width: 46px; height: 46px; border: 1px dashed var(--coral); border-radius: 50%; display: grid; place-items: center; color: var(--coral); animation: orbit 2.4s linear infinite; }
@keyframes orbit { to { transform: rotate(360deg); } }

/* 热点气泡 */
.hotspot-callout { position: absolute; left: 0; top: 0; z-index: 5; width: 0; height: 0; will-change: transform; }
.callout-body {
  position: absolute; top: -28px; width: 166px; padding: 10px 24px 11px 12px;
  border: 1px solid rgba(116, 89, 67, 0.14); border-radius: 13px;
  background: rgba(255, 252, 247, 0.94); backdrop-filter: blur(10px);
  box-shadow: 0 12px 28px rgba(83, 59, 42, 0.14); animation: callout-in 0.26s cubic-bezier(0.2, 0.85, 0.3, 1);
}
.hotspot-callout[data-side="right"] .callout-body { left: 22px; }
.hotspot-callout[data-side="left"] .callout-body { right: 22px; }
@keyframes callout-in { from { opacity: 0; transform: translateX(-6px) scale(0.96); } }
.callout-body b { display: block; padding-inline-start: 13px; font: 500 13px var(--font-serif); position: relative; }
.callout-body b::before { content: ""; position: absolute; left: 0; top: 5px; width: 7px; height: 7px; border-radius: 50%; background: var(--hotspot-color); }
.callout-body small { display: block; margin-top: 3px; padding-inline-start: 13px; color: var(--muted); font-size: 10px; line-height: 1.35; }
.callout-close { position: absolute; top: 5px; inset-inline-end: 5px; width: 20px; height: 20px; display: grid; place-items: center; border: 0; border-radius: 50%; background: transparent; color: var(--muted); cursor: pointer; }

/* 测验 */
.quiz-bar {
  position: absolute; z-index: 6; inset-inline: 92px 16px; top: 16px; display: flex; align-items: center; gap: 14px;
  padding: 12px 13px 12px 18px; border: 1px solid var(--line); border-radius: 20px;
  background: rgba(255, 252, 247, 0.95); backdrop-filter: blur(14px); box-shadow: 0 12px 30px rgba(75, 54, 40, 0.11);
}
.quiz-prompt { display: flex; flex-direction: column; gap: 2px; min-width: 0; }
.quiz-prompt em { color: var(--muted); font-style: normal; font-size: 10px; text-transform: uppercase; letter-spacing: 0.13em; }
.quiz-prompt strong { font: 500 21px/1.15 var(--font-serif); color: var(--coral); overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.quiz-meta { margin-inline-start: auto; display: flex; flex-direction: column; align-items: flex-end; gap: 6px; }
.quiz-progress { color: var(--muted); font-size: 10px; letter-spacing: 0.06em; }
.quiz-pips { display: flex; gap: 5px; list-style: none; margin: 0; padding: 0; }
.quiz-pips li { width: 17px; height: 4px; border-radius: 999px; background: rgba(117, 91, 70, 0.16); transition: background 0.25s; }
.quiz-pips li.ok { background: #5c9e6b; }
.quiz-pips li.no { background: #d1584f; }
.quiz-pips li.now { background: var(--coral); }
.quiz-bar > button { flex: none; width: 30px; height: 30px; display: grid; place-items: center; border: 1px solid var(--line); border-radius: 50%; background: transparent; cursor: pointer; }

.quiz-answer {
  position: absolute; z-index: 7; left: 50%; bottom: 72px; transform: translateX(-50%);
  display: flex; align-items: center; gap: 13px; min-width: min(330px, calc(100% - 40px));
  padding: 13px 20px 13px 15px; border-radius: 18px; box-shadow: 0 16px 38px rgba(75, 54, 40, 0.18);
  animation: quiz-in 0.26s cubic-bezier(0.2, 0.85, 0.3, 1);
}
@keyframes quiz-in { from { opacity: 0; transform: translate(-50%, 10px); } }
.quiz-answer-icon { flex: none; width: 40px; height: 40px; display: grid; place-items: center; border-radius: 50%; font-size: 20px; }
.quiz-answer > div strong { display: block; font: 500 18px/1.2 var(--font-serif); }
.quiz-answer > div span { display: block; font-size: 12px; line-height: 1.4; }
.quiz-answer.ok { background: #e6f2e8; color: #2f5c3c; }
.quiz-answer.ok .quiz-answer-icon { background: #5c9e6b; color: #fff; }
.quiz-answer.no { background: #fbe7e5; color: #8f382f; }
.quiz-answer.no .quiz-answer-icon { background: #d1584f; color: #fff; }

.quiz-summary {
  position: absolute; z-index: 8; left: 50%; top: 50%; transform: translate(-50%, -50%);
  width: min(320px, calc(100% - 40px)); padding: 26px 22px 20px; text-align: center;
  border: 1px solid var(--line); border-radius: 24px; background: #fffaf2; box-shadow: 0 26px 70px rgba(63, 42, 28, 0.22);
  animation: modal-in 0.32s cubic-bezier(0.2, 0.85, 0.3, 1);
}
.quiz-summary h2 { margin: 4px 0 6px; font: 500 26px var(--font-serif); }
.quiz-summary p { margin: 0; color: #6e655f; font: 500 14px var(--font-serif); }
.quiz-summary-actions { margin-top: 18px; display: flex; flex-direction: column; gap: 8px; }
.quiz-summary-actions button { min-height: 38px; border: 0; border-radius: 10px; background: linear-gradient(110deg, #ed8a72, #e87868); color: #fff; cursor: pointer; font-size: 12px; }
.quiz-summary-actions button.ghost { border: 1px solid var(--line); background: transparent; color: var(--ink); }

/* 信息面板 */
.info-panel { padding: 20px 19px 18px; overflow: auto; scrollbar-width: none; max-height: 660px; }
.info-panel::-webkit-scrollbar { width: 0; }
.info-kicker { display: flex; align-items: center; gap: 6px; color: #795c55; }
.info-kicker svg { color: #ee8a7a; }
.info-title-row { display: flex; justify-content: space-between; align-items: flex-start; margin-top: 13px; }
.info-title-row h1 { margin: 0; font: 500 40px/0.95 var(--font-serif); letter-spacing: -0.02em; }
.info-title-row em { display: block; margin-top: 7px; font: italic 13px var(--font-serif); color: var(--lavender); }
.specimen-stamp { width: 78px; height: 78px; flex: none; display: grid; place-items: center; border-radius: 50%; overflow: hidden; background: radial-gradient(circle, #fff 25%, rgba(237, 142, 120, 0.12)); }
.specimen-stamp img { width: 100%; height: 100%; object-fit: cover; mix-blend-mode: multiply; }
.description { margin: 18px 0 14px; font: 500 14px/1.5 var(--font-serif); }
.rule { height: 1px; background: var(--line); }
.info-panel h2 { margin: 16px 0 10px; font: 600 10px var(--font-sans); color: #6b625b; }
.key-facts { margin: 0; display: flex; flex-direction: column; gap: 10px; }
.key-facts > div { display: grid; grid-template-columns: 96px 1fr; gap: 8px; align-items: baseline; }
.key-facts dt { display: flex; gap: 7px; font: 500 13px var(--font-serif); }
.key-facts dt span { color: var(--coral); width: 14px; }
.key-facts dd { margin: 0; color: var(--muted); font: 500 12px/1.4 var(--font-serif); }
.medical-note, .fun-note { margin-top: 14px; display: flex; gap: 9px; padding: 10px; border-radius: 12px; }
.medical-note { background: rgba(142, 109, 197, 0.065); color: #6d568f; }
.fun-note { background: rgba(198, 154, 94, 0.09); color: #86663c; }
.medical-note p, .fun-note p { margin: 0; font: 500 11px/1.5 var(--font-serif); }
.medical-note b, .fun-note b { display: block; margin-bottom: 2px; color: var(--ink); font-weight: 600; }
.action-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 8px; margin-top: 14px; }
.action-grid button {
  min-height: 38px; padding: 0 12px; border: 1px solid #c9b3df; border-radius: 10px; background: rgba(255,255,255,.2);
  display: flex; gap: 7px; align-items: center; justify-content: center; color: #8062b6; cursor: pointer; font-size: 11px;
}
.action-grid button:nth-child(2) { border-color: #bdcfaa; color: #789067; }
.action-grid button:last-child { grid-column: 1 / -1; border-color: #b9c6e3; color: #6e88bd; }
.action-grid button.active { background: rgba(111, 137, 192, 0.1); box-shadow: inset 0 0 0 1px #8ca2d0; }
.structure-list { list-style: none; margin: 0; padding: 0; display: flex; flex-direction: column; gap: 6px; }
.structure-list button {
  width: 100%; display: flex; align-items: center; gap: 9px; padding: 8px 10px; text-align: start;
  border: 1px solid transparent; border-radius: 11px; background: rgba(255,255,255,.28); cursor: pointer; font-size: 12px;
}
.structure-list button:hover { border-color: var(--line); }
.structure-list button.on { background: rgba(238, 124, 106, 0.08); border-color: rgba(238, 124, 106, 0.3); }
.structure-list i { width: 8px; height: 8px; border-radius: 50%; flex: none; }
.structure-list b { font: 500 13px var(--font-serif); }
.structure-list span { margin-inline-start: auto; color: var(--muted); font-size: 10px; }

/* --------------------------------------------------------- 卡片区 --- */
.learning-cards { margin-top: 16px; display: grid; grid-template-columns: 1.05fr repeat(5, 1fr); gap: 14px; }
.learning-cards article {
  min-height: 206px; min-width: 0; padding: 13px 14px 12px; display: flex; flex-direction: column; overflow: hidden;
  border: 1px solid var(--line); border-radius: 22px; background: rgba(255, 251, 244, 0.68); box-shadow: var(--shadow);
}
.learning-cards article > header { display: flex; align-items: flex-start; justify-content: space-between; gap: 8px; min-height: 34px; }
.learning-cards em { display: block; color: var(--lavender); font-size: 10px; text-transform: uppercase; letter-spacing: 0.1em; font-style: normal; }
.learning-cards h3 { margin: 3px 0 0; font: 500 13px/1.25 var(--font-serif); overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.learning-cards article > button {
  margin-top: auto; width: 100%; min-height: 34px; padding: 0 12px; display: flex; align-items: center; justify-content: space-between;
  border: 1px solid var(--line); border-radius: 10px; background: rgba(255,255,255,.26); cursor: pointer; font: 500 12px var(--font-serif);
}
.curiosity-card { justify-content: center; padding-inline-start: 24px; background: linear-gradient(145deg, rgba(255,247,234,.72), rgba(247,231,210,.88)); }
.curiosity-card span { color: #c8a0b8; font-size: 26px; }
.curiosity-card p { margin: 4px 0 8px; font: 500 17px/1.45 var(--font-serif); }
.curiosity-card em { color: var(--lavender); font-style: italic; font-size: 12px; text-transform: none; }
.curiosity-card > button { margin-top: 12px; }

.organ-card-image { position: relative; overflow: hidden; isolation: isolate; flex: none; width: min(100%, 200px); aspect-ratio: 1; margin: 8px auto 12px; cursor: pointer; }
.organ-card-image img { width: 100%; height: 100%; object-fit: contain; display: block; mix-blend-mode: multiply; animation: art-in 0.5s cubic-bezier(0.2, 0.8, 0.3, 1); }
@keyframes art-in { from { opacity: 0; transform: scale(0.96) translateY(4px); } }
.microscope-visual { border-radius: 50%; box-shadow: inset 0 0 0 5px rgba(255,255,255,.38), 0 6px 18px rgba(121, 72, 73, 0.08); }
.microscope-visual img { border-radius: 50%; object-fit: cover; }
.system-visual img, .comparison-visual img { border-radius: 12px; }
.function-visual { display: grid; place-items: center; }
.function-pulse { position: absolute; width: 80px; height: 80px; border: 1px solid rgba(235, 124, 107, 0.32); border-radius: 50%; animation: organ-pulse 2.2s ease-out infinite; pointer-events: none; }
@keyframes organ-pulse { 0% { opacity: .7; transform: scale(.62); } 80%, 100% { opacity: 0; transform: scale(1.35); } }
.play-badge { position: absolute; width: 38px; height: 38px; border: 1px solid rgba(255,255,255,.8); border-radius: 50%; background: rgba(255,255,255,.72); color: #b4a99f; display: grid; place-items: center; font-size: 12px; box-shadow: 0 3px 12px rgba(0,0,0,.1); pointer-events: none; }
.condition-list { list-style: none; margin: 8px 0 12px; padding: 0; flex: 1; display: flex; flex-direction: column; justify-content: center; gap: 8px; font: 500 11px var(--font-serif); }
.condition-list li::before { content: "♥"; color: #e9968b; margin-inline-end: 7px; }

.site-foot { margin-top: 18px; display: flex; justify-content: space-between; gap: 12px; flex-wrap: wrap; color: var(--muted); font-size: 11px; }

/* --------------------------------------------------------- 对比条 --- */
.compare-strip {
  position: fixed; z-index: 30; left: 50%; bottom: 20px; transform: translateX(-50%);
  width: min(720px, calc(100% - 24px)); padding: 12px 15px;
  display: grid; grid-template-columns: 1fr auto 1fr 1.4fr auto; align-items: center; gap: 12px;
  border: 1px solid var(--line); border-radius: 18px; background: rgba(255, 251, 245, 0.95);
  backdrop-filter: blur(18px); box-shadow: 0 22px 60px rgba(64, 43, 29, 0.2);
  animation: strip-in 0.3s cubic-bezier(0.2, 0.85, 0.3, 1);
}
@keyframes strip-in { from { opacity: 0; transform: translate(-50%, 12px); } }
.compare-strip > div { display: flex; flex-direction: column; min-width: 0; }
.compare-strip .compare-organ { position: relative; padding-inline-start: 42px; min-height: 36px; justify-content: center; }
.compare-organ > img { position: absolute; inset-inline-start: 0; top: 50%; width: 36px; height: 36px; border-radius: 50%; object-fit: cover; transform: translateY(-50%); mix-blend-mode: multiply; }
.compare-strip span { color: var(--lavender); font-size: 9px; text-transform: uppercase; letter-spacing: 0.1em; }
.compare-strip strong { font: 500 18px var(--font-serif); }
.compare-strip small { color: var(--muted); font-size: 9px; }
.compare-strip dl { margin: 0; display: flex; gap: 14px; }
.compare-strip dl div { max-width: 120px; }
.compare-strip dt { color: var(--muted); font-size: 8px; text-transform: uppercase; }
.compare-strip dd { margin: 3px 0 0; font: 500 10px/1.25 var(--font-serif); }
.compare-strip > button { border: 0; background: transparent; cursor: pointer; color: var(--muted); display: grid; place-items: center; }
.compare-strip .vs { color: var(--muted); font: 500 12px var(--font-serif); }

/* ----------------------------------------------------------- 模态 --- */
.modal-backdrop {
  position: fixed; inset: 0; z-index: 60; display: grid; place-items: center; padding: 18px;
  background: rgba(52, 39, 30, 0.26); backdrop-filter: blur(8px);
}
.learning-modal {
  width: min(460px, 100%); max-height: min(90vh, 880px); overflow: auto; scrollbar-width: none;
  position: relative; padding: 28px 26px 24px; text-align: center;
  border: 1px solid var(--line); border-radius: 26px; background: #fffaf2; box-shadow: 0 30px 90px rgba(63, 42, 28, 0.24);
  animation: modal-in 0.35s cubic-bezier(0.2, 0.85, 0.3, 1);
}
@keyframes modal-in { from { opacity: 0; transform: translateY(14px) scale(0.98); } }
.modal-close { position: absolute; top: 12px; inset-inline-end: 12px; width: 32px; height: 32px; display: grid; place-items: center; border: 1px solid var(--line); border-radius: 50%; background: transparent; cursor: pointer; }
.learning-modal h2 { margin: 6px 0 10px; font: 500 30px var(--font-serif); }
.learning-modal > p { color: #6e655f; font: 500 14px/1.6 var(--font-serif); margin: 0; }
.modal-figure { margin: 16px 0 4px; aspect-ratio: 1; max-height: 42vh; display: grid; place-items: center; overflow: hidden; border-radius: 20px; background: radial-gradient(circle at 50% 42%, #fff, #f8ecdf); }
.modal-figure img { width: 100%; height: 100%; object-fit: contain; mix-blend-mode: multiply; }
.modal-demo { width: 132px; height: 132px; margin: 16px auto 6px; border-radius: 50%; display: grid; place-items: center; overflow: hidden; background: radial-gradient(circle, #fff, #f5ded6); }
.modal-demo img { width: 100%; height: 100%; object-fit: cover; mix-blend-mode: multiply; }
.modal-demo.moving img { animation: heartbeat 1.1s ease-in-out infinite; }
@keyframes heartbeat { 0%, 100% { transform: scale(1); } 15% { transform: scale(1.12); } 28% { transform: scale(1); } 40% { transform: scale(1.07); } }
.modal-facts { margin: 14px 0 4px; display: grid; grid-template-columns: repeat(3, 1fr); gap: 10px; text-align: start; }
.modal-facts dt { color: var(--muted); font-size: 9px; text-transform: uppercase; letter-spacing: 0.1em; }
.modal-facts dd { margin: 4px 0 0; font: 500 12px/1.3 var(--font-serif); }
.modal-actions { margin-top: 18px; display: flex; flex-direction: column; gap: 8px; }
.modal-actions button { min-height: 40px; border: 0; border-radius: 10px; background: linear-gradient(110deg, #ed8a72, #e87868); color: #fff; cursor: pointer; font-size: 12px; box-shadow: 0 9px 20px rgba(208, 90, 70, 0.16); }
.modal-actions button.ghost { background: transparent; border: 1px solid var(--line); color: var(--ink); box-shadow: none; }
.lesson-step { display: inline-flex; align-items: center; gap: 8px; margin-top: 6px; color: var(--muted); font-size: 11px; }
.lesson-step i { width: 8px; height: 8px; border-radius: 50%; background: var(--coral); }

.drawer-backdrop { position: fixed; inset: 0; z-index: 40; border: 0; background: rgba(52, 39, 30, 0.26); backdrop-filter: blur(5px); }

/* --------------------------------------------------------- 响应式 --- */
@media (max-width: 1240px) {
  .workspace { grid-template-columns: 224px minmax(0, 1fr) 300px; }
  .learning-cards { grid-template-columns: repeat(3, 1fr); }
  .curiosity-card { grid-column: span 3; }
  .viewer-shell { height: 560px; }
}

@media (max-width: 1000px) {
  .app-shell { padding: 14px 14px 16px; }
  .search-box { display: none; }
  .library-trigger { display: flex; margin-inline-start: auto; }
  .workspace { grid-template-columns: 210px minmax(0, 1fr); }
  .info-panel { grid-column: 1 / -1; max-height: none; }
  .viewer-shell { height: 540px; }
  .info-panel { display: grid; grid-template-columns: 1fr 1.15fr; gap: 0 22px; align-content: start; }
  .info-kicker, .info-title-row { grid-column: 1; }
  .description, .rule, .info-panel h2, .key-facts, .medical-note, .fun-note, .action-grid, .structure-list { grid-column: 2; }
  .info-title-row { margin-top: 0; }
  .description { margin-top: 8px; }
  .organ-library { max-height: 540px; }
}

@media (max-width: 760px) {
  .app-shell { padding: 10px 10px 16px; }
  .topbar { height: 54px; gap: 10px; }
  .brand strong { font-size: 25px; }
  .brand em { display: none; }
  .workspace { display: block; margin-top: 8px; }
  .viewer-shell { height: 62vh; min-height: 420px; border-radius: 22px; }
  .organ-library {
    position: fixed; z-index: 42; left: 8px; right: 8px; bottom: 8px; height: min(72vh, 560px);
    transform: translateY(110%); transition: transform 0.3s cubic-bezier(0.2, 0.85, 0.3, 1);
    border-radius: 24px; background: #fffaf3; max-height: none; padding-bottom: 12px;
  }
  .organ-library.open { transform: translateY(0); }
  .mobile-close { display: grid; }
  .organ-list { display: grid; grid-template-columns: 1fr 1fr; }
  .organ-item { min-height: 72px; }
  .organ-library blockquote { display: block; margin: 10px 4px 0; font: 500 15px/1.4 var(--font-serif); color: #7d7168; }
  .organ-library blockquote cite { display: block; margin-top: 4px; font-style: normal; font-size: 11px; color: var(--lavender); }
  .info-panel { display: block; margin-top: 10px; border-radius: 22px; padding: 16px 15px; }
  .info-title-row h1 { font-size: 34px; }
  .specimen-stamp { width: 64px; height: 64px; }
  .learning-cards { grid-template-columns: 1fr 1fr; gap: 10px; margin-top: 10px; }
  .curiosity-card { grid-column: span 2; }
  .learning-cards article { min-height: 190px; border-radius: 20px; }
  .organ-card-image { width: min(100%, 240px); }
  .viewer-tools {
    inset-inline: 10px; top: auto; bottom: 10px; transform: none; width: auto; height: 56px;
    flex-direction: row; justify-content: space-around; padding: 4px; border-radius: 15px;
  }
  .tool-button { width: 46px; height: 46px; }
  .tool-button span { display: none; }
  .auto-rotate { bottom: 76px; inset-inline-end: 10px; }
  .view-caption { inset-inline-start: 12px; bottom: 78px; }
  .tip-note { width: 128px; padding: 10px; }
  .tip-note p { font-size: 11px; }
  .callout-body { width: 148px; }
  .quiz-bar { inset-inline: 10px; top: 10px; gap: 10px; padding: 10px 10px 10px 14px; }
  .quiz-prompt strong { font-size: 17px; }
  .quiz-answer { bottom: 92px; }
  .compare-strip { grid-template-columns: 1fr auto 1fr auto; bottom: 12px; }
  .compare-strip dl { display: none; }
  .site-foot { font-size: 10px; }
}

@media (max-width: 420px) {
  .viewer-shell { height: 58vh; min-height: 380px; }
  .organ-list { grid-template-columns: 1fr; }
  .learning-cards { grid-template-columns: 1fr; }
  .curiosity-card { grid-column: span 1; }
  .organ-card-image { width: min(100%, 280px); }
  .tip-note { display: none; }
}

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