/* 共享主题仅覆盖颜色及主题控件；资料布局与数据保持原有实现。 */
:root{color-scheme:light}
:root[data-theme="dark"]{
  color-scheme:dark;
  --paper:#171b20;--white:#20262d;--surface:#20262d;--ink:#e8e8e3;
  --muted:#b4bec6;--line:#65727e;--accent:#ffaaa0;--tint:#3c2928;
  --blue:#a3d6ee;--green:#b0d4ac;--violet:#d3bfee;
  --control-line:#84929f;--placeholder:#b4bec6;--subtle:#282f37;
  --on-solid:#171b20;--on-accent:#171b20;
  --quoted-ink:#a3d6ee;--quoted-bg:#24343e;--quoted-line:#7999a8;
  --available-ink:#b0d4ac;--available-bg:#27362b;--available-line:#7c9c7e;
  --pending-ink:#f0c293;--pending-bg:#3a3025;--pending-line:#b6936e;
  --shadow:0 12px 35px #0004;
}
/* 脚本关闭时仍跟随系统；显式浅色选择不受此规则影响。 */
@media(prefers-color-scheme:dark){:root:not([data-theme]){
  color-scheme:dark;
  --paper:#171b20;--white:#20262d;--surface:#20262d;--ink:#e8e8e3;
  --muted:#b4bec6;--line:#65727e;--accent:#ffaaa0;--tint:#3c2928;
  --blue:#a3d6ee;--green:#b0d4ac;--violet:#d3bfee;
  --control-line:#84929f;--placeholder:#b4bec6;--subtle:#282f37;
  --on-solid:#171b20;--on-accent:#171b20;
  --quoted-ink:#a3d6ee;--quoted-bg:#24343e;--quoted-line:#7999a8;
  --available-ink:#b0d4ac;--available-bg:#27362b;--available-line:#7c9c7e;
  --pending-ink:#f0c293;--pending-bg:#3a3025;--pending-line:#b6936e;
  --shadow:0 12px 35px #0004;
}}
.theme-control{display:flex;align-items:center;gap:8px;flex-shrink:0;color:var(--muted);font:12px/1.5 var(--sans)}
.theme-control select{min-height:44px;max-width:145px;padding:8px;border:1px solid var(--control-line,var(--muted));border-radius:2px;background:var(--white,var(--surface));color:var(--ink);font:16px/1.5 var(--sans);cursor:pointer}
.theme-control select:focus-visible{outline:3px solid var(--blue);outline-offset:4px}
/* 在线概念地图复用原有tokens，补齐模板中的固定浅色表面。 */
.themed-map{--control-line:#8b949b;--subtle:#eeefea;--quoted-bg:#f0f5f7;--quoted-ink:#28566b;--quoted-line:#a9bec9;--available-bg:#f1f5ee;--available-ink:#4e6147;--available-line:#c4c9bb;--pending-bg:#fff4e5;--pending-ink:#81512d;--pending-line:#d8bc96}
.themed-map input{color:var(--ink)}
.themed-map input::placeholder{color:var(--muted)}
.themed-map .search input,.themed-map .select-label select,.themed-map .button{border-color:var(--control-line)}
.themed-map .concept,.themed-map .execution .concept{background:var(--surface);border-left-color:var(--line);border-right-color:var(--line);border-bottom-color:var(--line)}
.themed-map .concept:hover,.themed-map .concept[aria-pressed=true]{background:var(--tint)}
.themed-map .concept[aria-pressed=true]{border-color:var(--accent)}
.themed-map .execution,.themed-map .maintenance code{background:var(--subtle)}
.themed-map .tag{background:var(--surface)}
.themed-map .tag.r1{color:var(--accent);background:var(--tint);border-color:var(--accent)}
.themed-map .tag.r2{color:var(--quoted-ink);background:var(--quoted-bg);border-color:var(--quoted-line)}
.themed-map .tag.r3{color:var(--available-ink);background:var(--available-bg);border-color:var(--available-line)}
.themed-map .tag.pending{color:var(--pending-ink);background:var(--pending-bg);border-color:var(--pending-line)}
.themed-map .doc-summary{color:var(--muted)}
.themed-map .timeline-intro,.themed-map .dialog-body .version{background:var(--quoted-bg)}
.themed-map .top-inner{flex-wrap:wrap;padding-top:10px;padding-bottom:10px}
.themed-map .top-links{flex-wrap:wrap}
@media(max-width:1100px){.head-inner{height:auto;min-height:88px;flex-wrap:wrap;gap:0 16px;padding-top:14px}.head-inner nav{order:3;width:100%;height:44px;margin-top:10px}.theme-control{margin-left:auto}}
@media(max-width:760px){.head-inner{display:flex;align-items:center;gap:0 8px}.head-inner .brand{min-width:0}.theme-control>span{position:absolute;width:1px;height:1px;overflow:hidden;clip-path:inset(50%);white-space:nowrap}.theme-control select{max-width:120px}.themed-map .top-links{order:3;width:100%;gap:20px}.themed-map .top-links a:last-child{display:inline}}
@media(max-width:350px){.head-inner .theme-control{margin-top:10px}.head-inner .brand{flex-basis:100%}}
@media print{
  :root,:root[data-theme],:root:not([data-theme]){color-scheme:light;--paper:#fff;--white:#fff;--surface:#fff;--ink:#242b32;--muted:#626a6e;--line:#dcdcd4;--accent:#a52d26;--blue:#285d72;--tint:#f5e9e3;--subtle:#efeee7}
  .theme-control{display:none!important}
}