:root{
  --paper:#FBF7F0;
  --surface:#FFFCF7;
  --ink:#2C2416;
  --muted:#7D7264;
  --jade:#2D5A47;
  --jade-light:#3A7360;
  --gold:#B8943A;
  --border:#D5C9B5;
  --header-h:78px;
  --footer-h:28px;
}

*,*::before,*::after{box-sizing:border-box}
html,body{width:100%;height:100%;margin:0;overflow:hidden;background:#fff;color:var(--ink)}
body{font-family:-apple-system,BlinkMacSystemFont,"PingFang SC","Noto Sans SC","Microsoft YaHei",sans-serif}
button,a{font:inherit;-webkit-tap-highlight-color:transparent}
button:focus-visible,a:focus-visible{outline:3px solid rgba(184,148,58,.32);outline-offset:2px}
svg{fill:none;stroke:currentColor;stroke-width:1.7;stroke-linecap:round;stroke-linejoin:round}

.model-header{
  height:var(--header-h);display:flex;align-items:center;gap:22px;padding:0 18px 0 24px;
  border-bottom:1px solid var(--border);background:rgba(251,247,240,.98);
  position:relative;z-index:10
}
.model-header::after{
  content:"";position:absolute;left:39%;right:23%;bottom:0;height:58px;opacity:.12;pointer-events:none;
  background:
    linear-gradient(135deg,transparent 48%,var(--jade) 49%,transparent 50%) 0 15px/72px 36px,
    linear-gradient(45deg,transparent 48%,var(--jade) 49%,transparent 50%) 27px 0/76px 48px
}
.brand{display:flex;align-items:center;gap:12px;color:var(--ink);text-decoration:none;z-index:1;white-space:nowrap}
.brand-mark{width:45px;height:45px;color:var(--jade);display:block}
.brand-mark svg{width:100%;height:100%;stroke-width:1.25}
.brand-copy strong{
  display:block;font-family:"Songti SC","Noto Serif SC",serif;
  font-size:23px;line-height:1.15;letter-spacing:.055em
}
.brand-copy small{display:block;margin-top:4px;color:#98783E;font-size:10px;letter-spacing:.14em}
.mode-switcher{
  display:flex;gap:3px;padding:3px;border:1px solid var(--border);border-radius:9px;
  background:rgba(237,230,216,.66);position:relative;z-index:1
}
.mode-button{
  height:34px;padding:0 12px;border:0;border-radius:6px;background:transparent;color:var(--muted);
  display:flex;align-items:center;justify-content:center;gap:7px;font-size:11px;font-weight:700;
  cursor:pointer;white-space:nowrap;transition:.16s ease
}
.mode-button svg{width:17px;height:17px}
.mode-button:hover{color:var(--jade)}
.mode-button.active{background:var(--surface);color:var(--jade);box-shadow:0 1px 5px rgba(44,36,22,.1)}
.status-dot{
  width:7px;height:7px;border-radius:50%;background:#4D9B70;
  box-shadow:0 0 0 4px rgba(77,155,112,.13),0 0 11px rgba(77,155,112,.4)
}
.header-actions{margin-left:auto;display:flex;gap:8px;position:relative;z-index:1}
.header-button{
  height:42px;padding:0 13px;border:1px solid var(--border);border-radius:8px;
  display:inline-flex;align-items:center;justify-content:center;gap:7px;
  background:var(--surface);color:var(--ink);text-decoration:none;
  font-size:12px;font-weight:650;cursor:pointer;white-space:nowrap;transition:.16s ease
}
.header-button svg{width:18px;height:18px}
.header-button:hover{border-color:var(--gold);transform:translateY(-1px)}
.header-button.primary{background:var(--jade);border-color:var(--jade);color:#fff}
.header-button.primary:hover{background:var(--jade-light);border-color:var(--jade-light)}

.model-stage{
  position:relative;width:100%;height:calc(100vh - var(--header-h) - var(--footer-h));
  overflow:hidden;background:#fff
}
/* Flash-free initial view: inline script sets --init-view before paint */
html:not(.view-image) .body-3d-view,
html.view-image .acupoint-image-view{display:block}
html:not(.view-image) .acupoint-image-view,
html.view-image .body-3d-view{display:none}
.view-panel{position:absolute;inset:0}
.view-panel[hidden]{display:none}
.body-3d-view iframe{display:block;width:100%;height:100%;border:0;background:#fff}
.loading-cover{
  position:absolute;z-index:4;inset:0;display:flex;flex-direction:column;align-items:center;justify-content:center;
  gap:8px;background:#fff;color:var(--jade);transition:opacity .38s ease
}
.loading-cover.done{opacity:0;pointer-events:none}
.loading-cover small{color:var(--muted)}
.loading-ring{
  width:38px;height:38px;border:2px solid var(--border);border-top-color:var(--jade);
  border-radius:50%;animation:loading-spin .8s linear infinite;margin-bottom:3px
}
@keyframes loading-spin{to{transform:rotate(360deg)}}
.highlight-note{
  position:absolute;z-index:5;top:10px;left:50%;transform:translateX(-50%);
  min-height:39px;max-width:calc(100% - 24px);padding:7px 38px 7px 13px;
  border:1px solid rgba(184,148,58,.42);border-radius:8px;background:rgba(255,252,247,.94);
  box-shadow:0 4px 18px rgba(44,36,22,.1);backdrop-filter:blur(8px);
  display:flex;align-items:center;gap:9px;color:var(--ink);font-size:11px;white-space:nowrap
}
.highlight-note[hidden]{display:none}
.highlight-note strong{color:var(--gold);font-size:12px}
.highlight-note span{font-weight:700;color:var(--jade)}
.highlight-note small{color:var(--muted)}
.highlight-note button{
  position:absolute;right:8px;top:50%;transform:translateY(-50%);
  width:24px;height:24px;border:0;background:transparent;color:var(--muted);
  font-size:18px;line-height:1;cursor:pointer
}
.error-card{
  position:absolute;z-index:6;left:50%;top:50%;transform:translate(-50%,-50%);
  padding:18px 24px;border:1px solid var(--border);border-radius:9px;background:var(--surface)
}
.acupoint-image-view{background:var(--paper);overflow:auto}
.image-workspace{
  min-height:100%;display:grid;grid-template-columns:262px minmax(0,1fr) 350px;background:var(--paper)
}
/* ── SIDEBAR ── */
.point-sidebar{
  border-right:1px solid var(--border);background:rgba(255,252,247,.94);
  display:flex;flex-direction:column;overflow:hidden
}
.sidebar-search-box{
  padding:12px;border-bottom:1px solid var(--border);flex:0 0 auto
}
.sidebar-search-box input{
  width:100%;height:34px;padding:0 10px;border:1px solid var(--border);border-radius:7px;
  background:var(--surface);color:var(--ink);font-size:12px;outline:none
}
.sidebar-search-box input:focus{border-color:var(--jade);box-shadow:0 0 0 3px rgba(45,90,71,.08)}
.sidebar-search-box input::placeholder{color:var(--ink-muted)}
.sidebar-meridian-list{
  flex:1;overflow-y:auto;padding:8px 0;scrollbar-width:thin;scrollbar-color:var(--border) transparent
}
.meridian-group{margin-bottom:2px}
.meridian-group-header{
  display:flex;align-items:center;gap:8px;padding:8px 12px 8px 14px;
  cursor:pointer;user-select:none;transition:background .12s
}
.meridian-group-header:hover{background:rgba(184,148,58,.05)}
.meridian-group-header .swatch{width:16px;height:3px;border-radius:2px;flex:0 0 auto}
.meridian-group-header .group-name{font-size:12px;font-weight:700;color:var(--ink);flex:1}
.meridian-group-header .group-count{font-size:10px;color:var(--ink-muted)}
.meridian-group-header .group-arrow{
  width:14px;height:14px;color:var(--ink-muted);transition:transform .2s;flex:0 0 auto
}
.meridian-group.collapsed .group-arrow{transform:rotate(-90deg)}
.meridian-group.collapsed .meridian-points{display:none}
.meridian-points{padding:0 0 6px}
.sidebar-point{
  display:flex;align-items:center;gap:6px;padding:4px 12px 4px 38px;
  cursor:pointer;transition:background .1s;font-size:11px;color:var(--ink-light)
}
.sidebar-point:hover{background:rgba(184,148,58,.07);color:var(--ink)}
.sidebar-point.active{background:rgba(45,90,71,.08);color:var(--jade);font-weight:700}
.sidebar-point .code{font-size:9px;color:var(--ink-muted);margin-left:auto}
.sidebar-point.hidden{display:none}
.sidebar-no-result{padding:20px 14px;text-align:center;color:var(--ink-muted);font-size:11px;display:none}
.sidebar-no-result.visible{display:block}
.image-main{min-width:0;padding:14px 18px 16px;display:flex;flex-direction:column;gap:12px}
.image-toolbar{
  min-height:54px;display:flex;align-items:center;gap:18px;padding:8px 12px;
  border:1px solid var(--border);border-radius:9px;background:var(--surface);box-shadow:0 2px 10px rgba(44,36,22,.04)
}
.compact-button{
  height:34px;min-width:76px;padding:0 12px;border:1px solid var(--border);border-radius:7px;
  display:inline-flex;align-items:center;justify-content:center;gap:5px;background:#fff;color:var(--jade);
  font-size:12px;font-weight:700;line-height:1;white-space:nowrap;cursor:pointer
}
.selected-point-title{min-width:180px}
.selected-point-title small{display:block;color:var(--muted);font-size:10px;margin-bottom:3px}
.selected-point-title strong{
  font-family:"Songti SC","Noto Serif SC",serif;color:var(--gold);font-size:19px;letter-spacing:.04em
}
.selected-point-title em{font-size:13px;font-style:normal;margin-left:4px}
.image-search{margin-left:auto;display:flex;align-items:center;gap:8px}
.image-search label{font-size:10px;color:var(--muted);white-space:nowrap}
.image-search>div{height:34px;display:flex;border:1px solid var(--border);border-radius:6px;overflow:hidden;background:#fff}
.image-search input{width:180px;border:0;outline:0;padding:0 10px;background:transparent;color:var(--ink);font-size:12px}
.image-search button{
  width:52px;border:0;border-left:1px solid var(--border);background:var(--jade);color:#fff;
  font-size:11px;font-weight:700;cursor:pointer
}
.image-navigation{display:flex;align-items:center;gap:6px;color:var(--muted);font-size:10px}
.image-navigation[hidden]{display:none}
.image-navigation button{
  width:30px;height:30px;border:1px solid var(--border);border-radius:50%;background:#fff;
  color:var(--jade);font-size:22px;line-height:1;cursor:pointer
}
.image-frame{
  position:relative;flex:none;min-height:0;aspect-ratio:16/9;margin:auto 0;border:1px solid var(--border);border-radius:10px;
  overflow:hidden;background:#fff;display:flex;align-items:flex-start;justify-content:center;
  box-shadow:0 5px 24px rgba(44,36,22,.07)
}
.image-frame img{display:block;width:100%;height:100%;object-fit:contain;background:#fff}
.image-frame figcaption{
  position:absolute;left:12px;bottom:10px;padding:6px 9px;border-radius:5px;
  color:#fff;background:rgba(44,36,22,.68);font-size:9px;backdrop-filter:blur(6px)
}
.image-missing{max-width:410px;padding:34px;text-align:center;color:var(--ink)}
.image-missing[hidden]{display:none}
.image-missing strong{display:block;color:var(--gold);font-size:18px;margin-bottom:8px}
.image-missing p{color:var(--muted);font-size:12px;line-height:1.7}
.image-missing button{
  margin-top:8px;height:36px;padding:0 16px;border:0;border-radius:6px;background:var(--jade);color:#fff;cursor:pointer
}
.point-detail-panel{
  border-left:1px solid var(--border);background:rgba(255,252,247,.92);padding:18px 14px;
  overflow-y:auto
}
.detail-heading{padding:0 6px 13px;border-bottom:1px solid #E8DFCF}
.detail-heading small{display:block;color:var(--muted);font-size:10px;margin-bottom:5px}
.detail-heading h2{
  margin:0;color:var(--gold);font-family:"Songti SC","Noto Serif SC",serif;font-size:24px;letter-spacing:.05em
}
.detail-heading h2 em{font-size:15px;font-style:normal;margin-left:5px}
.detail-list{display:grid;gap:9px;padding-top:12px}
.detail-list section{padding:11px 12px;border:1px solid #E8DFCF;border-radius:8px;background:rgba(255,255,255,.58)}
.detail-list h3{margin:0 0 6px;color:#6D5733;font-family:"Songti SC","Noto Serif SC",serif;font-size:13px}
.detail-list p{margin:0;color:#5C5244;font-size:11px;line-height:1.7}
.detail-list .pairing-section{border-color:rgba(45,90,71,.24);background:rgba(232,240,236,.66)}
.detail-list .pairing-section h3{color:var(--jade)}
.image-disclaimer{margin:12px 2px 0;padding:10px;border-top:1px solid #E8DFCF;color:var(--muted);font-size:9px;line-height:1.6}
.model-footer{
  height:var(--footer-h);padding:0 13px;display:flex;align-items:center;justify-content:space-between;
  border-top:1px solid var(--border);background:#EDE6D8;color:var(--muted);font-size:9px
}

@media(max-width:1100px){
  .image-workspace{grid-template-columns:238px minmax(0,1fr) 310px}
}
@media(max-width:950px){
  .image-workspace{display:block}
  .point-sidebar{position:fixed;left:0;top:var(--header-h);bottom:var(--footer-h);z-index:40;
    width:min(300px,80vw);border-right:1px solid var(--border);
    transform:translateX(-105%);transition:transform .24s ease;box-shadow:0 4px 20px rgba(44,36,22,.08)}
  .point-sidebar.open{transform:translateX(0)}
  .image-main{padding:12px;gap:10px}
  .image-toolbar{gap:9px}
  .image-search label{display:none}
  .image-frame{height:clamp(360px,62vh,620px);aspect-ratio:auto;margin:0}
  .point-detail-panel{border-left:0;border-top:1px solid var(--border);padding:14px 12px;overflow:visible}
  .detail-list{grid-template-columns:1fr}
  .model-header{gap:10px;padding:0 12px}
  .brand-copy small{display:none}
  .brand-copy strong{font-size:20px}
  .header-button{padding:0 10px}
  .mode-button{padding:0 9px}
}
@media(max-width:640px){
  :root{--header-h:62px;--footer-h:24px}
  .model-header{padding:0 9px}
  .brand{gap:8px}
  .brand-mark{width:35px;height:35px}
  .brand-copy strong{font-size:17px;letter-spacing:.02em}
  .mode-switcher{position:absolute;left:50%;bottom:-43px;transform:translateX(-50%);z-index:12;background:rgba(251,247,240,.97)}
  .mode-button{height:34px;padding:0 10px}
  .mode-button .status-dot{display:none}
  .header-actions{gap:5px}
  .header-button{width:37px;height:37px;padding:0;font-size:0}
  .header-button svg{width:19px;height:19px}
  .highlight-note{top:7px;display:block;text-align:center;white-space:normal;padding:7px 34px 7px 10px}
  .highlight-note strong,.highlight-note span,.highlight-note small{margin:0 3px}
  .model-footer span:last-child{display:none}
  .image-workspace{padding-top:43px}
  .image-main{padding:8px;gap:8px}
  .image-toolbar{min-height:94px;display:grid;grid-template-columns:minmax(0,1fr) auto;padding:8px;column-gap:8px}
  .selected-point-title{min-width:0}
  #openSidebarButton{min-width:76px;padding:0 10px}
  .image-search{grid-column:1/-1;margin:0;width:100%}
  .image-search>div{width:100%}
  .image-search input{width:100%}
  .image-frame{height:clamp(390px,64vh,620px);min-height:0;flex:none}
  .point-detail-panel{padding:14px 10px}
  .image-frame figcaption{left:7px;bottom:7px}
}
@media(prefers-reduced-motion:reduce){
  *,*::before,*::after{animation-duration:.01ms!important;transition-duration:.01ms!important}
}