/* ══════════════════════════════════════════
   针灸解剖学基础 · 样式表
   acupuncture.css — 与 tcm.css 同系列风格，独立维护
   主色调：米白 + 浅金 + 青墨（区别于tcm的暖金）
   ══════════════════════════════════════════ */

:root {
  --bg:         #f8f9f7;
  --bg2:        #eef1ec;
  --gold:       #7a9a6a;   /* 青绿金 — 区别tcm的暖金 */
  --gold-light: #b8d4a8;
  --gold-pale:  #edf5e8;
  --ink:        #1e2c1a;
  --ink2:       #3d5236;
  --ink3:       #7a9070;
  --accent:     #4a7c59;
  --red:        #8b3a3a;
  --border:     #ccd9c4;
  --shadow:     rgba(30,44,26,0.09);

  /* 经脉颜色（五行归属） */
  --c-lung:     #6b8cba;   /* 肺  金-蓝 */
  --c-li:       #8aaa6a;   /* 大肠 金-绿 */
  --c-st:       #c4a04a;   /* 胃  土-黄 */
  --c-sp:       #c47a4a;   /* 脾  土-橙 */
  --c-ht:       #c45050;   /* 心  火-红 */
  --c-si:       #b06080;   /* 小肠 火-玫 */
  --c-bl:       #5080b0;   /* 膀胱 水-蓝 */
  --c-ki:       #405090;   /* 肾  水-深蓝 */
  --c-pc:       #7050a0;   /* 心包 火-紫 */
  --c-sj:       #50a080;   /* 三焦 火-青 */
  --c-gb:       #609060;   /* 胆  木-绿 */
  --c-lv:       #507840;   /* 肝  木-深绿 */
}

* { margin:0; padding:0; box-sizing:border-box; }
html { scroll-behavior: smooth; }
body {
  font-family: 'Noto Sans SC', sans-serif;
  background: var(--bg);
  color: var(--ink);
  min-height: 100vh;
  font-size: 15px;
  line-height: 1.8;
}

/* ── HEADER ── */
header {
  background: var(--ink);
  padding: 0 2rem;
  position: sticky; top: 0; z-index: 100;
  display: flex; align-items: center; justify-content: space-between;
  height: 60px;
  border-bottom: 2px solid var(--gold);
}
.logo {
  font-family: 'Noto Serif SC', serif;
  color: var(--gold-light);
  font-size: 1.1rem;
  letter-spacing: .15em;
  font-weight: 600;
}
.header-right { display: flex; align-items: center; gap: 1rem; }
.search-wrap { position: relative; }
#searchInput {
  background: rgba(255,255,255,0.08);
  border: 1px solid rgba(122,154,106,0.4);
  border-radius: 20px;
  padding: .35rem 1rem .35rem 2.2rem;
  color: #fff;
  font-size: .82rem;
  width: 180px;
  outline: none;
  transition: border .2s, width .2s;
}
#searchInput::placeholder { color: var(--ink3); }
#searchInput:focus { border-color: var(--gold); width: 220px; }
.search-icon {
  position: absolute; left: .7rem; top: 50%; transform: translateY(-50%);
  color: var(--gold-light); font-size: .85rem; pointer-events: none;
}
.progress-badge {
  font-size: .78rem;
  color: var(--gold-light);
  background: rgba(122,154,106,0.15);
  border: 1px solid rgba(122,154,106,0.3);
  border-radius: 12px;
  padding: .2rem .8rem;
  white-space: nowrap;
}

/* ── TABS ── */
.tabs-bar {
  background: var(--bg2);
  border-bottom: 1px solid var(--border);
  display: flex;
  overflow-x: auto;
  scrollbar-width: none;
  padding: 0 1.5rem;
  position: sticky; top: 60px; z-index: 90;
}
.tabs-bar::-webkit-scrollbar { display: none; }
.tab-btn {
  flex-shrink: 0;
  padding: .85rem 1.4rem;
  font-size: .84rem;
  font-family: 'Noto Serif SC', serif;
  color: var(--ink3);
  background: none; border: none;
  cursor: pointer;
  border-bottom: 3px solid transparent;
  transition: color .2s, border-color .2s;
  white-space: nowrap;
  letter-spacing: .05em;
}
.tab-btn:hover { color: var(--accent); }
.tab-btn.active { color: var(--ink); border-bottom-color: var(--gold); font-weight: 600; }
.tab-btn .done-dot {
  display: inline-block; width: 7px; height: 7px;
  background: var(--accent); border-radius: 50%;
  margin-left: 5px; vertical-align: middle; opacity: 0;
  transition: opacity .3s;
}
.tab-btn.completed .done-dot { opacity: 1; }

/* ── PANELS ── */
.panel { display: none; max-width: 900px; margin: 0 auto; padding: 2.5rem 1.5rem 4rem; }
.panel.active { display: block; animation: fadeUp .4s ease; }
@keyframes fadeUp {
  from { opacity:0; transform:translateY(14px); }
  to   { opacity:1; transform:translateY(0); }
}
@keyframes fadeIn { from { opacity:0; } to { opacity:1; } }

/* ── CHAPTER HEADER ── */
.chapter-header {
  display: flex; align-items: baseline; gap: 1rem;
  margin-bottom: 2rem;
  padding-bottom: 1rem;
  border-bottom: 1px solid var(--border);
}
.chapter-num {
  font-family: 'Noto Serif SC', serif;
  font-size: 2.4rem;
  color: var(--gold);
  line-height: 1;
  font-weight: 300;
}
.chapter-title {
  font-family: 'Noto Serif SC', serif;
  font-size: 1.6rem;
  color: var(--ink);
  font-weight: 600;
  letter-spacing: .1em;
}
.chapter-sub {
  font-size: .84rem;
  color: var(--ink3);
  margin-top: .2rem;
  letter-spacing: .05em;
}

/* ── SECTION TITLE ── */
.section-title {
  font-family: 'Noto Serif SC', serif;
  font-size: 1.1rem;
  color: var(--ink);
  font-weight: 600;
  margin: 2rem 0 1rem;
  padding-left: .9rem;
  border-left: 3px solid var(--gold);
  letter-spacing: .08em;
}

/* ── INTRO BOX ── */
.intro-box {
  background: var(--gold-pale);
  border: 1px solid var(--gold-light);
  border-radius: 8px;
  padding: 1.2rem 1.5rem;
  margin-bottom: 1.5rem;
  font-size: .9rem;
  color: var(--ink2);
  line-height: 1.9;
}
.intro-box .quote {
  font-family: 'Noto Serif SC', serif;
  color: var(--accent);
  font-size: .95rem;
  margin-top: .7rem;
  padding-left: .8rem;
  border-left: 2px solid var(--gold-light);
}

/* ── SVG BODY NAVIGATOR ── */
.body-nav-wrap {
  display: flex;
  gap: 2rem;
  align-items: flex-start;
  margin: 1rem 0 2rem;
}
.body-svg-col {
  flex-shrink: 0;
  position: sticky;
  top: 130px;
}
.body-svg-col svg {
  width: 160px;
  height: auto;
}
.body-region {
  cursor: pointer;
  transition: opacity .2s;
  opacity: .7;
}
.body-region:hover { opacity: 1; }
.body-region.active { opacity: 1; }
.body-region path, .body-region ellipse, .body-region rect, .body-region polygon {
  transition: fill .25s;
}
.body-region:hover path, .body-region:hover ellipse,
.body-region:hover polygon {
  fill: var(--gold) !important;
}
.body-region.active path, .body-region.active ellipse,
.body-region.active polygon {
  fill: var(--accent) !important;
}
.body-label {
  font-family: 'Noto Serif SC', serif;
  font-size: 9px;
  fill: var(--ink2);
  text-anchor: middle;
  pointer-events: none;
}
.region-hint {
  font-size: .75rem;
  color: var(--ink3);
  margin-top: .5rem;
  text-align: center;
  letter-spacing: .05em;
  width: 160px;
}
.body-content-col { flex: 1; min-width: 0; }

/* ── REGION SECTION ── */
.region-section {
  margin-bottom: 2.5rem;
  scroll-margin-top: 140px;
}
.region-header {
  font-family: 'Noto Serif SC', serif;
  font-size: 1.05rem;
  font-weight: 600;
  color: var(--ink);
  margin-bottom: .8rem;
  display: flex; align-items: center; gap: .6rem;
}
.region-icon {
  width: 28px; height: 28px;
  background: var(--ink);
  color: var(--gold-light);
  border-radius: 50%;
  display: flex; align-items: center; justify-content: center;
  font-size: .85rem;
  flex-shrink: 0;
}

/* ── CARDS ── */
.cards-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(240px, 1fr));
  gap: .9rem;
  margin-bottom: 1rem;
}
.card {
  background: #fff;
  border: 1px solid var(--border);
  border-radius: 10px;
  overflow: hidden;
  cursor: pointer;
  transition: box-shadow .2s, transform .2s;
  box-shadow: 0 1px 4px var(--shadow);
}
.card:hover { box-shadow: 0 5px 18px var(--shadow); transform: translateY(-2px); }
.card-head {
  background: var(--ink);
  padding: .8rem 1rem;
  display: flex; align-items: center; gap: .6rem;
}
.card-icon { font-size: 1.2rem; }
.card-name {
  font-family: 'Noto Serif SC', serif;
  color: var(--gold-light);
  font-size: .95rem;
  letter-spacing: .08em;
}
.card-preview {
  padding: .65rem 1rem;
  font-size: .8rem;
  color: var(--ink3);
}
.card-body {
  padding: .8rem 1rem;
  font-size: .83rem;
  color: var(--ink2);
  display: none;
  animation: fadeIn .3s;
  line-height: 1.85;
  border-top: 1px solid var(--border);
}
.card.open .card-body { display: block; }
.card.open .card-preview { display: none; }
.expand-hint {
  font-size: .7rem; color: var(--ink3);
  text-align: right; padding: .3rem 1rem .5rem; opacity: .6;
}
.card.open .expand-hint { display: none; }
.tag {
  display: inline-block;
  font-size: .68rem;
  background: var(--gold-pale);
  color: var(--accent);
  border: 1px solid var(--gold-light);
  border-radius: 4px;
  padding: .1rem .45rem;
  margin: .15rem .1rem;
}
.tag-nerve  { background: #eef2fa; color: #3a5a9a; border-color: #b0c4e8; }
.tag-vessel { background: #fdeaea; color: #8a3030; border-color: #f0b0b0; }
.tag-muscle { background: #eafaee; color: #2a6a3a; border-color: #90d0a8; }
.tag-bone   { background: #f5f0e8; color: #7a5a20; border-color: #d4bc88; }

/* ── MERIDIAN CARDS ── */
.meridian-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
  gap: 1rem;
  margin: 1rem 0 1.5rem;
}
.mer-card {
  border-radius: 10px;
  border: 1px solid;
  overflow: hidden;
  cursor: pointer;
  transition: box-shadow .2s, transform .2s;
  box-shadow: 0 1px 4px var(--shadow);
}
.mer-card:hover { box-shadow: 0 5px 18px var(--shadow); transform: translateY(-2px); }
.mer-head {
  padding: .85rem 1.1rem;
  display: flex; align-items: center; gap: .8rem;
}
.mer-badge {
  width: 36px; height: 36px;
  border-radius: 50%;
  display: flex; align-items: center; justify-content: center;
  font-family: 'Noto Serif SC', serif;
  font-size: 1rem;
  font-weight: 700;
  color: #fff;
  flex-shrink: 0;
}
.mer-info { flex: 1; }
.mer-name {
  font-family: 'Noto Serif SC', serif;
  font-size: 1rem;
  font-weight: 600;
  letter-spacing: .08em;
}
.mer-alias { font-size: .72rem; opacity: .7; margin-top: .1rem; }
.mer-body {
  padding: 0 1.1rem;
  max-height: 0; overflow: hidden;
  transition: max-height .4s ease, padding .3s;
  font-size: .83rem;
  line-height: 1.85;
}
.mer-card.open .mer-body { max-height: 500px; padding: .8rem 1.1rem 1rem; }
.mer-row { display: flex; gap: .5rem; margin: .35rem 0; }
.mer-key {
  font-weight: 500;
  white-space: nowrap;
  min-width: 50px;
  font-size: .8rem;
}
.mer-acupoint {
  display: inline-block;
  background: rgba(255,255,255,0.6);
  border-radius: 4px;
  padding: .05rem .4rem;
  font-size: .75rem;
  margin: .1rem;
  border: 1px solid rgba(0,0,0,0.1);
}

/* ── TABLE ── */
.acu-table {
  width: 100%;
  border-collapse: collapse;
  font-size: .84rem;
  margin: 1rem 0 1.5rem;
}
.acu-table th {
  background: var(--ink);
  color: var(--gold-light);
  padding: .6rem .9rem;
  text-align: center;
  font-family: 'Noto Serif SC', serif;
  font-weight: 400;
  letter-spacing: .06em;
}
.acu-table td {
  padding: .5rem .9rem;
  text-align: center;
  border-bottom: 1px solid var(--border);
  color: var(--ink2);
}
.acu-table tr:nth-child(even) td { background: var(--bg2); }
.acu-table tr:hover td { background: var(--gold-pale); }

/* ── QUIZ ── */
.quiz-section {
  background: var(--bg2);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 1.5rem;
  margin-top: 2.5rem;
}
.quiz-header {
  font-family: 'Noto Serif SC', serif;
  font-size: 1.1rem;
  color: var(--ink);
  font-weight: 600;
  margin-bottom: 1.2rem;
  display: flex; align-items: center; gap: .6rem;
}
.quiz-q {
  margin-bottom: 1.4rem;
  background: #fff;
  border-radius: 8px;
  padding: 1rem 1.2rem;
  border: 1px solid var(--border);
}
.quiz-q-text {
  font-size: .9rem;
  color: var(--ink);
  margin-bottom: .9rem;
  font-weight: 500;
  line-height: 1.7;
}
.quiz-options { display: flex; flex-direction: column; gap: .5rem; }
.quiz-opt {
  display: flex; align-items: center; gap: .7rem;
  padding: .55rem .9rem;
  border-radius: 6px;
  border: 1px solid var(--border);
  cursor: pointer;
  font-size: .85rem;
  color: var(--ink2);
  transition: background .15s, border-color .15s;
  user-select: none;
}
.quiz-opt:hover { background: var(--gold-pale); border-color: var(--gold-light); }
.quiz-opt.selected { background: var(--gold-pale); border-color: var(--gold); color: var(--ink); font-weight: 500; }
.quiz-opt.selected::before { content: '◉ '; color: var(--gold); }
.quiz-opt:not(.selected)::before { content: '○ '; color: var(--ink3); }
.quiz-opt.correct { background: #eaf5ee; border-color: #8ad0a8; color: #1a5c35; font-weight: 500; }
.quiz-opt.correct::before { content: '✓ '; color: #2e7d52; }
.quiz-opt.wrong   { background: #fdecea; border-color: #f5b5ae; color: #852a20; }
.quiz-opt.wrong::before { content: '✗ '; color: #c0392b; }
.quiz-opt.show-correct { background: #eaf5ee; border-color: #8ad0a8; color: #1a5c35; opacity: .7; }
.quiz-opt.show-correct::before { content: '✓ '; color: #2e7d52; }
.quiz-opt input { display: none; }
.quiz-feedback {
  font-size: .8rem; margin-top: .5rem;
  padding: .4rem .7rem; border-radius: 4px; display: none;
}
.quiz-feedback.correct { background: #eaf5ee; color: #1a5c35; display: block; }
.quiz-feedback.wrong   { background: #fdecea; color: #852a20; display: block; }
.quiz-submit {
  background: var(--ink);
  color: var(--gold-light);
  border: none; border-radius: 8px;
  padding: .7rem 2rem;
  font-size: .88rem;
  font-family: 'Noto Serif SC', serif;
  cursor: pointer;
  letter-spacing: .1em;
  transition: background .2s, transform .1s;
  margin-top: .5rem;
}
.quiz-submit:hover { background: #0e1a0a; }
.quiz-submit:active { transform: scale(.98); }
.quiz-result {
  margin-top: 1rem;
  font-family: 'Noto Serif SC', serif;
  font-size: 1rem;
  color: var(--ink);
  text-align: center;
  display: none;
  padding: .8rem;
  background: var(--gold-pale);
  border-radius: 8px;
}
.mark-done-btn {
  display: block; width: 100%;
  margin-top: 1rem;
  background: none;
  border: 2px solid var(--gold);
  color: var(--gold); border-radius: 8px;
  padding: .65rem;
  font-size: .88rem;
  font-family: 'Noto Serif SC', serif;
  cursor: pointer;
  letter-spacing: .1em;
  transition: background .2s, color .2s;
}
.mark-done-btn:hover { background: var(--gold); color: #fff; }
.mark-done-btn.done { background: var(--accent); border-color: var(--accent); color: #fff; cursor: default; }

/* ── SEARCH RESULTS ── */
#searchResults {
  position: absolute;
  top: 36px; right: 0;
  background: #fff;
  border: 1px solid var(--border);
  border-radius: 8px;
  box-shadow: 0 8px 24px var(--shadow);
  width: 260px; max-height: 280px;
  overflow-y: auto; z-index: 200; display: none;
}
.sr-item {
  padding: .6rem 1rem;
  cursor: pointer; font-size: .83rem; color: var(--ink2);
  border-bottom: 1px solid var(--border);
  transition: background .1s;
}
.sr-item:hover { background: var(--gold-pale); }
.sr-chapter { font-size: .72rem; color: var(--accent); margin-bottom: .1rem; }

/* ── QUXUE METHOD CARDS ── */
.method-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
  gap: 1rem;
  margin: 1rem 0 1.5rem;
}
.method-card {
  background: #fff;
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 1.1rem;
  box-shadow: 0 1px 4px var(--shadow);
}
.method-num {
  width: 28px; height: 28px;
  background: var(--ink);
  color: var(--gold-light);
  border-radius: 50%;
  font-family: 'Noto Serif SC', serif;
  font-size: .85rem;
  display: flex; align-items: center; justify-content: center;
  margin-bottom: .7rem;
}
.method-name {
  font-family: 'Noto Serif SC', serif;
  font-size: .95rem;
  font-weight: 600;
  color: var(--ink);
  margin-bottom: .45rem;
  letter-spacing: .05em;
}
.method-desc { font-size: .82rem; color: var(--ink2); line-height: 1.8; }
.method-example {
  margin-top: .6rem;
  font-size: .78rem;
  color: var(--accent);
  background: var(--gold-pale);
  border-radius: 4px;
  padding: .3rem .6rem;
}

/* ── RESPONSIVE ── */
@media (max-width: 660px) {
  .body-nav-wrap { flex-direction: column; }
  .body-svg-col { position: static; display: flex; flex-direction: column; align-items: center; }
  .cards-grid { grid-template-columns: 1fr; }
  .meridian-grid { grid-template-columns: 1fr; }
  .chapter-num { font-size: 1.8rem; }
  .chapter-title { font-size: 1.2rem; }
  #searchInput { width: 130px; }
}