/* ── 铜人经穴 · 展厅式墨色界面 ─────────────────────────
   墨 #0f0c09 · 宣纸 #ede3cf · 鎏金 #d9a441 · 朱砂 #c8402c */
:root {
  --ink: #0f0c09;
  --ink-2: #1b1510;
  --paper: #ede3cf;
  --paper-dim: #a3967d;
  --gold: #d9a441;
  --cinnabar: #c8402c;
  --panel: rgba(24, 18, 12, .82);
  --hairline: rgba(217, 164, 65, .22);
  --serif: "Songti SC", "STSongti-SC", "Noto Serif CJK SC", "Source Han Serif SC", "SimSun", serif;
  --sans: "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", system-ui, sans-serif;
  --mono: "SF Mono", "JetBrains Mono", Menlo, Consolas, monospace;
}

* { margin: 0; padding: 0; box-sizing: border-box; }
html, body { height: 100%; }
body {
  font-family: var(--sans);
  color: var(--paper);
  background:
    radial-gradient(120% 90% at 50% 30%, #241a10 0%, #15100b 46%, var(--ink) 100%);
  overflow: hidden;
  -webkit-tap-highlight-color: transparent;
}

#stage { position: fixed; inset: 0; }
#stage canvas { display: block; touch-action: none; }

/* ── 题名 ── */
.masthead {
  position: fixed; top: 20px; left: 22px;
  display: flex; align-items: center; gap: 12px;
  pointer-events: none; z-index: 5;
}
.seal {
  width: 44px; height: 44px; flex: none;
  background: var(--cinnabar); color: #f5ead6;
  font-family: var(--serif); font-size: 26px; font-weight: 700;
  display: grid; place-items: center;
  border-radius: 6px;
  box-shadow: 0 2px 10px rgba(200, 64, 44, .35), inset 0 0 0 1.5px rgba(245, 234, 214, .35);
}
.masthead-text h1 {
  font-family: var(--serif); font-size: 26px; font-weight: 700;
  letter-spacing: .30em; color: var(--paper); line-height: 1.15;
  text-shadow: 0 2px 12px rgba(0,0,0,.6);
}
.masthead-text p {
  font-size: 11px; letter-spacing: .18em; color: var(--paper-dim); margin-top: 3px;
}

/* ── 视角按钮 ── */
.viewbar {
  position: fixed; top: 22px; right: 22px; z-index: 5;
  display: flex; gap: 6px;
}
.viewbar button {
  font-family: var(--sans); font-size: 12px; letter-spacing: .1em;
  color: var(--paper-dim); background: var(--panel);
  border: 1px solid var(--hairline); border-radius: 4px;
  padding: 7px 12px; cursor: pointer;
  backdrop-filter: blur(8px); -webkit-backdrop-filter: blur(8px);
  transition: color .15s, border-color .15s;
}
.viewbar button:hover { color: var(--gold); border-color: var(--gold); }
.viewbar button.on { color: var(--gold); border-color: var(--gold); }
.viewbar button:focus-visible,
button:focus-visible, input:focus-visible {
  outline: 2px solid var(--gold); outline-offset: 1px;
}

/* ── 目录开关（移动端） ── */
#listToggle {
  position: fixed; left: 16px; bottom: 56px; z-index: 8;
  display: none;
  font-size: 13px; letter-spacing: .12em; color: var(--ink);
  background: var(--gold); border: none; border-radius: 999px;
  padding: 10px 18px; cursor: pointer;
  box-shadow: 0 4px 16px rgba(0,0,0,.5);
}
#listToggle span { opacity: .7; font-size: 11px; margin-left: 4px; }

/* ── 穴位目录 ── */
#listPanel {
  position: fixed; top: 92px; left: 22px; bottom: 60px; width: 252px; z-index: 5;
  display: flex; flex-direction: column;
  background: var(--panel); border: 1px solid var(--hairline); border-radius: 8px;
  backdrop-filter: blur(10px); -webkit-backdrop-filter: blur(10px);
  overflow: hidden;
}
.list-head { display: flex; gap: 6px; padding: 10px 10px 6px; }
#searchBox {
  flex: 1; font-size: 13px; color: var(--paper);
  background: rgba(0,0,0,.35); border: 1px solid var(--hairline); border-radius: 4px;
  padding: 7px 10px;
}
#searchBox::placeholder { color: rgba(163,150,125,.7); }
#listClose {
  display: none; width: 34px; font-size: 18px; color: var(--paper-dim);
  background: none; border: 1px solid var(--hairline); border-radius: 4px; cursor: pointer;
}
.chips { display: flex; flex-wrap: wrap; gap: 5px; padding: 4px 10px 8px; }
.chips button {
  font-size: 11px; letter-spacing: .08em; color: var(--paper-dim);
  background: none; border: 1px solid var(--hairline); border-radius: 999px;
  padding: 4px 10px; cursor: pointer; transition: all .15s;
}
.chips button.on { color: var(--ink); background: var(--gold); border-color: var(--gold); }

#pointList { flex: 1; overflow-y: auto; padding: 2px 6px 10px; scrollbar-width: thin; }
#pointList h4 {
  font-family: var(--serif); font-size: 12px; font-weight: 400;
  color: var(--gold); letter-spacing: .28em;
  padding: 10px 8px 5px; border-bottom: 1px solid var(--hairline); margin-bottom: 3px;
}
.pt-item {
  display: flex; align-items: baseline; gap: 8px; width: 100%;
  font-size: 13px; color: var(--paper); text-align: left;
  background: none; border: none; border-radius: 4px;
  padding: 6px 8px; cursor: pointer;
}
.pt-item:hover { background: rgba(217,164,65,.10); }
.pt-item.sel { background: rgba(200,64,44,.18); }
.pt-item.sel .pt-name { color: var(--cinnabar); }
.pt-name { font-family: var(--serif); font-size: 14px; letter-spacing: .06em; }
.pt-tag { font-size: 11px; color: var(--paper-dim); white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }

/* ── 详情卡 ── */
#card {
  position: fixed; top: 92px; right: 22px; width: 320px; max-height: calc(100% - 160px);
  z-index: 5; overflow-y: auto; scrollbar-width: thin;
  background: var(--panel); border: 1px solid var(--hairline); border-radius: 8px;
  backdrop-filter: blur(10px); -webkit-backdrop-filter: blur(10px);
  padding: 18px 18px 16px;
}
#cardClose {
  display: none; position: absolute; top: 8px; right: 8px;
  width: 30px; height: 30px; font-size: 17px; color: var(--paper-dim);
  background: none; border: none; cursor: pointer;
}
.card-head { border-bottom: 1px solid var(--hairline); padding-bottom: 12px; margin-bottom: 12px; }
.card-head h2 {
  font-family: var(--serif); font-size: 30px; font-weight: 700;
  letter-spacing: .12em; color: var(--gold); line-height: 1.2;
}
.card-sub { display: flex; flex-wrap: wrap; gap: 8px; align-items: baseline; margin-top: 6px; }
.card-sub .py { font-family: var(--mono); font-size: 12px; color: var(--paper-dim); letter-spacing: .04em; }
.card-sub .mer {
  font-size: 11px; color: var(--gold); border: 1px solid var(--hairline);
  border-radius: 3px; padding: 2px 7px; letter-spacing: .1em;
}
#card h3 {
  font-family: var(--serif); font-size: 13px; font-weight: 400;
  color: var(--cinnabar); letter-spacing: .3em; margin: 14px 0 6px;
}
#card h3::before { content: "◈ "; color: var(--gold); }
#card p { font-size: 13.5px; line-height: 1.85; color: var(--paper); }
.caution {
  margin-top: 12px; padding: 8px 12px; font-size: 12.5px; line-height: 1.7;
  color: #f0b7ab; background: rgba(200,64,44,.14);
  border-left: 3px solid var(--cinnabar); border-radius: 0 4px 4px 0;
}
.massage-note {
  margin-top: 14px; padding-top: 10px; border-top: 1px dashed var(--hairline);
  font-size: 11.5px; line-height: 1.7; color: var(--paper-dim);
}
.intro-legend { display: flex; flex-direction: column; gap: 8px; margin-top: 12px; }
.intro-legend span { display: flex; align-items: center; gap: 8px; font-size: 12.5px; color: var(--paper-dim); }
.dot { width: 10px; height: 10px; border-radius: 50%; flex: none; }
.dot.g { background: var(--gold); box-shadow: 0 0 8px rgba(217,164,65,.8); }
.dot.r { background: var(--cinnabar); box-shadow: 0 0 8px rgba(200,64,44,.8); }

/* ── 悬浮标签 ── */
#hoverTip, #pointLabel {
  position: fixed; z-index: 8; pointer-events: none;
  font-family: var(--serif); letter-spacing: .1em;
  transform: translate(-50%, -140%);
  white-space: nowrap;
}
#hoverTip {
  font-size: 13px; color: var(--ink); background: var(--gold);
  padding: 3px 10px; border-radius: 3px;
  box-shadow: 0 2px 10px rgba(0,0,0,.45);
}
#pointLabel {
  font-size: 14px; color: #f5ead6; background: var(--cinnabar);
  padding: 4px 12px; border-radius: 3px;
  box-shadow: 0 2px 12px rgba(200,64,44,.4);
}
#pointLabel::after {
  content: ""; position: absolute; left: 50%; top: 100%;
  transform: translateX(-50%);
  border: 5px solid transparent; border-top-color: var(--cinnabar);
}

/* ── 底部提示 ── */
.hint {
  position: fixed; left: 0; right: 0; bottom: 0; z-index: 4;
  display: flex; justify-content: space-between; gap: 12px;
  padding: 9px 22px; font-size: 11px; letter-spacing: .06em;
  color: rgba(163,150,125,.85);
  background: linear-gradient(transparent, rgba(10,7,5,.75));
  pointer-events: none;
}

/* ── 移动端 ── */
@media (max-width: 900px) {
  .masthead { top: 14px; left: 14px; gap: 9px; }
  .seal { width: 36px; height: 36px; font-size: 21px; }
  .masthead-text h1 { font-size: 20px; letter-spacing: .22em; }
  .masthead-text p { font-size: 10px; }

  .viewbar { top: auto; bottom: 56px; right: 12px; }
  .viewbar button { padding: 8px 10px; font-size: 12px; }

  #listToggle { display: block; }
  #listPanel {
    top: auto; left: 0; right: 0; bottom: 0; width: 100%;
    max-height: 68%; border-radius: 14px 14px 0 0; z-index: 9;
    transform: translateY(105%); transition: transform .28s ease;
  }
  #listPanel.open { transform: translateY(0); }
  #listClose { display: block; }

  #card {
    top: auto; left: 0; right: 0; bottom: 0; width: 100%; max-height: 46%;
    border-radius: 14px 14px 0 0; z-index: 7;
    transform: translateY(105%); transition: transform .28s ease;
    padding: 16px 16px 20px;
  }
  #card.open { transform: translateY(0); }
  #cardClose { display: block; }
  .card-head h2 { font-size: 24px; }

  .hint { justify-content: center; }
  .hint .disclaimer { display: none; }
}

@media (prefers-reduced-motion: reduce) {
  #listPanel, #card { transition: none; }
}