/* 时光机 / Time Machine (2026-10-30). Uses the site tokens from pages.css. */
.tm-root{--tm-pw:380px;--tm-bd:var(--line)}
.tm-head{display:flex;flex-wrap:wrap;align-items:flex-end;justify-content:space-between;gap:10px 24px;padding-top:22px;padding-bottom:14px}
.tm-ht{min-width:0;flex:1 1 420px}
.tm-head h1{font-family:var(--serif);font-size:28px;line-height:1.25;margin:0 0 6px;font-weight:700}
.tm-sub{margin:0;color:var(--ink2);font-size:14px;line-height:1.7;max-width:760px;overflow-wrap:anywhere}
.tm-tps{display:flex;gap:8px;flex-wrap:wrap}
.tm-tp{display:inline-flex;align-items:center;gap:6px;min-height:36px;padding:6px 14px;border:1px solid var(--tm-bd);border-radius:999px;font-size:13px;font-weight:600;color:var(--ink2);background:var(--paper);white-space:nowrap}
.tm-tp:hover{color:var(--ink);border-color:var(--ink2)}
.tm-tp.on{background:var(--ink);color:var(--bg);border-color:var(--ink)}
.tm-tp.off{opacity:.55;border-style:dashed;cursor:not-allowed}
.tm-tp small{font-weight:400;font-size:11px}
/* topic page: map + panel, the two resize against each other (C2/C3) */
.tm-app{display:grid;grid-template-columns:minmax(0,1fr) var(--tm-pw);gap:0;border-top:1px solid var(--tm-bd);border-bottom:1px solid var(--tm-bd);height:calc(100vh - 190px);min-height:460px;transition:grid-template-columns .45s ease}
.tm-topic[data-mode=detail]{--tm-pw:min(46vw,620px)}
.tm-topic[data-mode=read]{--tm-pw:min(68vw,900px)}
.tm-map{min-width:0;display:flex;flex-direction:column;background:var(--tint)}
.tm-legend{display:flex;flex-wrap:wrap;align-items:center;gap:6px 16px;padding:10px 20px 4px;font-size:12px;color:var(--ink2)}
.tm-lg{display:inline-flex;align-items:center;gap:6px}
.tm-lg i{width:18px;height:4px;border-radius:2px;background:var(--lc)}
[data-theme=dark] .tm-lg i{background:var(--lcd)}
.tm-keys{color:var(--mute)}
.tm-fit{margin-left:auto;border:1px solid var(--ink);background:var(--paper);color:var(--ink);border-radius:999px;padding:3px 12px;font-size:12px;font-weight:600;cursor:pointer}
.tm-fit[aria-pressed=true]{background:var(--ink);color:var(--paper)}
.tm-svg.tm-fitall{width:calc(100% - 24px);height:auto}
.tm-fitall .tm-lbl{display:none}
.tm-fitall .tm-yr text{font-size:26px}
.tm-fitall .tm-line{stroke-width:20}.tm-fitall .tm-line.tm-thin{stroke-width:10}
.tm-fitall .tm-c,.tm-fitall .tm-o{stroke-width:5}
.tm-fitall .tm-st.cur .tm-lbl,.tm-fitall .tm-st:hover .tm-lbl{display:inline;font-size:28px;stroke-width:9px}
.tm-follow{font-weight:600;color:var(--ink)}
.tm-follow button{margin-left:6px;border:1px solid var(--tm-bd);background:var(--paper);border-radius:999px;padding:2px 10px;font-size:12px;cursor:pointer}
.tm-scroll{flex:1;overflow:auto;overscroll-behavior:contain;display:flex;align-items:center;outline:none;scroll-behavior:smooth}
.tm-svg{display:block;flex:none;margin:0 auto}
.tm-yr line{stroke:var(--ink);stroke-opacity:.14;stroke-dasharray:4 6}
.tm-yr text{font:500 13px var(--mono);fill:var(--mute)}
.tm-line{fill:none;stroke:var(--lc);stroke-width:9;stroke-linecap:round;stroke-linejoin:round;transition:opacity .3s}
.tm-line.tm-thin{stroke-width:4.5}
[data-theme=dark] .tm-line{stroke:var(--lcd)}
.tm-st{cursor:pointer;transition:opacity .3s}
.tm-hit{fill:transparent}
.tm-c{fill:#fff;stroke:var(--lc);stroke-width:3;transition:fill .25s}
[data-theme=dark] .tm-c{fill:var(--paper);stroke:var(--lcd)}
.tm-o{fill:#fff;stroke:#141414;stroke-width:2.6}
.tm-o2{fill:none;stroke:#141414;stroke-width:2}
[data-theme=dark] .tm-o{fill:var(--paper);stroke:var(--ink)}
[data-theme=dark] .tm-o2{stroke:var(--ink)}
.tm-core{fill:var(--lc);opacity:0;transition:opacity .25s}
[data-theme=dark] .tm-core{fill:var(--lcd)}
.tm-has .tm-core,.tm-st.cur .tm-core{opacity:1}
.tm-st.cur .tm-c{stroke:var(--ink);stroke-width:3.4}
.tm-st:hover .tm-c{fill:#EDE6FD}
.tm-halo{fill:none;stroke:var(--ink);stroke-width:1.5;opacity:0;pointer-events:none}
.tm-st.cur .tm-halo{animation:tm-halo 1.8s ease-out infinite}
@keyframes tm-halo{0%{r:12px;opacity:.9}100%{r:21px;opacity:0}}
.tm-lbl{font:500 12.5px var(--mono);fill:#4A4A4A;paint-order:stroke;stroke:#F8F4EC;stroke-width:5px;stroke-linejoin:round}
[data-theme=dark] .tm-lbl{fill:var(--ink2);stroke:var(--tint)}
.tm-scroll{background-color:#F8F4EC;background-image:linear-gradient(rgba(20,20,20,.045) 1px,transparent 1px),linear-gradient(90deg,rgba(20,20,20,.045) 1px,transparent 1px);background-size:40px 40px;background-attachment:local}
[data-theme=dark] .tm-scroll{background-color:var(--tint);background-image:linear-gradient(rgba(255,255,255,.04) 1px,transparent 1px),linear-gradient(90deg,rgba(255,255,255,.04) 1px,transparent 1px)}
.tm-st:hover .tm-lbl,.tm-st:focus .tm-lbl{fill:var(--ink)}
.tm-st.cur .tm-lbl{fill:var(--red);font-weight:700}
.tm-st:focus{outline:none}.tm-st:focus-visible .tm-hit{stroke:var(--red);stroke-width:2}
.tm-dim .tm-line:not(.on),.tm-dim .tm-st:not(.on){opacity:.22}
.tm-hoot{filter:drop-shadow(0 2px 3px rgba(0,0,0,.25));transition:transform .7s cubic-bezier(.45,.05,.25,1);pointer-events:none}
.tm-nolist{columns:2;font-size:13px;padding:10px 40px}
/* panel */
.tm-panel{min-width:0;border-left:1px solid var(--tm-bd);background:var(--paper);display:flex;flex-direction:column;overflow:hidden}
.tm-bar{display:flex;align-items:center;gap:6px;padding:8px 12px;border-bottom:1px solid var(--tm-bd);min-height:52px}
.tm-handle{flex:1;min-width:0;display:flex;align-items:baseline;gap:8px;background:none;border:0;padding:4px 2px;cursor:pointer;text-align:left}
.tm-hb{width:28px;height:28px;flex:none;align-self:center}
.tm-handle span{font-size:12px;color:var(--mute);white-space:nowrap}
.tm-handle b{font-size:15px;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.tm-pos{font:12px var(--mono);color:var(--mute);white-space:nowrap}
.tm-ib{width:36px;height:36px;border:1px solid var(--tm-bd);border-radius:8px;background:var(--paper);cursor:pointer;font-size:16px;flex:none}
.tm-ib:hover{border-color:var(--ink2)}
.tm-topic[data-mode=map] #tm-close{display:none}
.tm-cards{flex:1;overflow:auto;padding:18px 22px 22px}
.tm-card{max-width:680px}
.tm-meta{display:flex;flex-wrap:wrap;gap:6px;align-items:center;margin-bottom:8px}
.tm-ym{font:600 12px var(--mono);color:var(--mute);margin-right:4px}
.tm-pill{font-size:11px;font-weight:700;padding:2px 9px;border-radius:999px;color:#fff;background:var(--lc)}
[data-theme=dark] .tm-pill{background:var(--lcd);color:#121212}
.tm-h{font-family:var(--serif);font-size:24px;margin:0 0 2px;line-height:1.3}
.tm-full{margin:0 0 12px;font-size:13px;color:var(--ink2);line-height:1.5;overflow-wrap:anywhere}
.tm-s{font-size:15px;line-height:1.8;margin:0 0 12px}
.tm-note,.tm-nodive{font-size:13px;color:var(--ink2);background:var(--tint);border-radius:8px;padding:8px 12px}
.tm-q{margin:14px 0;padding:10px 14px;border-left:3px solid var(--red);background:var(--tint);border-radius:0 8px 8px 0}
.tm-q p{margin:0;font-family:var(--serif);font-size:15px;line-height:1.8;overflow-wrap:anywhere}
.tm-q cite{display:block;margin-top:6px;font-style:normal;font-size:12px;color:var(--mute)}
.tm-hs{margin:14px 0;padding:12px 14px;background:#FBF6EC;border:1px solid #E9DCC3;border-radius:10px;color:#1E1A16}
.tm-hs b{display:block;font-size:13px;margin-bottom:4px}.tm-hs p{margin:0;font-size:14px;line-height:1.75}
[data-theme=dark] .tm-hs{background:#2A2520;border-color:#4A4036;color:#F2EADB}
.tm-xfer{display:flex;flex-wrap:wrap;gap:8px;margin:12px 0}
.tm-xb{border:2px solid var(--lc);background:var(--paper);border-radius:999px;padding:5px 12px;font-size:13px;font-weight:600;cursor:pointer;min-height:36px}
[data-theme=dark] .tm-xb{border-color:var(--lcd)}
.tm-xb.on{background:var(--lc);color:#fff}
.tm-acts{display:flex;flex-wrap:wrap;gap:8px;margin-top:14px}
.tm-btn{display:inline-flex;align-items:center;min-height:38px;padding:7px 14px;border-radius:8px;border:1px solid var(--ink);background:var(--ink);color:var(--bg);font-size:13px;font-weight:700;cursor:pointer;white-space:nowrap}
.tm-btn.tm-ghost{background:var(--paper);color:var(--ink);border-color:var(--tm-bd)}
.tm-btn:hover{opacity:.88}
.tm-nextrow{margin-top:22px;padding-top:14px;border-top:1px dashed var(--tm-bd)}
.tm-topic[data-mode=map] .tm-cards{display:block}
/* inline reader */
.tm-reader{flex:1;min-height:0;display:flex;flex-direction:column}
.tm-rbar{position:relative;display:flex;flex-wrap:wrap;gap:8px;padding:8px 14px 12px;border-bottom:1px solid var(--tm-bd)}
.tm-prog{position:absolute;left:0;right:0;bottom:-1px;height:3px;background:transparent}
.tm-prog i{display:block;height:100%;width:0;background:var(--red)}
.tm-toc{padding:8px 16px;border-bottom:1px solid var(--tm-bd);max-height:40%;overflow:auto;font-size:13px}
.tm-toc a{display:block;padding:5px 0;color:var(--ink2)}.tm-toc a.on{color:var(--red);font-weight:700}
.tm-rbody{flex:1;overflow:auto;padding:4px 26px 10px}
.tm-rbody .long{max-width:720px;margin:0 auto}
.tm-rbody img{max-width:100%;height:auto}
.tm-rbody .tbl{overflow-x:auto}
.tm-rbody pre{overflow-x:auto}
.tm-rbody .katex-display{overflow-x:auto;overflow-y:hidden}
.tm-rbody h1.tm-rt{font-family:var(--serif);font-size:24px;line-height:1.35;margin:16px 0 8px}
.tm-share-n{font-size:12px;color:var(--mute);padding:0 26px;margin:0}
.tm-reader .tm-nextrow{padding:12px 26px 16px;margin:0}
.tm-loading{color:var(--mute);padding:30px 0}
/* overview */
.tm-over .wrap{position:relative}
.tm-isls{display:grid;grid-template-columns:repeat(auto-fill,minmax(250px,1fr));gap:18px;margin:8px 0 18px}
.tm-isl{display:block;border:1px solid var(--tm-bd);border-radius:16px;padding:14px 16px 16px;background:var(--paper);transition:transform .2s,border-color .2s}
a.tm-isl:hover{transform:translateY(-2px);border-color:var(--ink2)}
.tm-isl.off{opacity:.6;border-style:dashed}
.tm-isl-sea{height:128px;border-radius:50% 46% 52% 44%/60% 55% 45% 50%;background:var(--tint);display:flex;align-items:center;justify-content:center;overflow:hidden;margin-bottom:10px}
.tm-isl-map{max-width:92%;height:auto}
.tm-isl-map path{fill:none;stroke:var(--lc);stroke-width:14;stroke-linecap:round}
[data-theme=dark] .tm-isl-map path{stroke:var(--lcd)}
.tm-isl-map circle{fill:var(--paper);stroke:var(--ink);stroke-width:5}
.tm-isl-q{font:700 40px var(--disp);color:var(--mute)}
.tm-isl h2{font-family:var(--serif);font-size:20px;margin:0 0 4px}
.tm-isl-st{margin:0;font-size:13px;color:var(--ink2)}
.tm-isl-l{margin:4px 0 0;font-size:12px;color:var(--mute)}
.tm-ohoot{position:absolute;left:24px;top:-6px;width:44px;height:44px;pointer-events:none;transition:transform .8s cubic-bezier(.45,.05,.25,1);z-index:3}
.tm-arch{font-size:13px;color:var(--ink2);margin:0 0 30px}
.tm-arch a{color:var(--red);font-weight:600}
/* mobile: map full width, the panel becomes a bottom sheet */
@media (max-width:760px){
  .tm-head{padding-top:14px}
  .tm-head h1{font-size:22px}
  .tm-tps{flex-wrap:nowrap;overflow-x:auto;width:100%;padding-bottom:4px;scrollbar-width:none}
  .tm-app{display:block;height:auto;min-height:0;border-bottom:0}
  .tm-scroll{height:calc(100vh - 300px);min-height:300px;align-items:center}
  .tm-keys{display:none}
  .tm-panel{position:fixed;left:0;right:0;bottom:0;z-index:30;border-left:0;border-top:1px solid var(--ink);border-radius:16px 16px 0 0;box-shadow:0 -8px 24px rgba(0,0,0,.15);height:64px;transition:height .35s ease}
  .tm-topic[data-mode=detail] .tm-panel{height:62vh}
  .tm-topic[data-mode=read] .tm-panel{height:calc(100vh - 52px)}
  .tm-topic[data-mode=map] .tm-cards,.tm-topic[data-mode=map] .tm-reader{display:none}
  .tm-cards{padding:14px 16px 24px}
  .tm-rbody{padding:4px 16px 10px}
  .tm-share-n{padding:0 16px}
  .tm-h{font-size:21px}
  .tm-page-topic .site-foot{padding-bottom:80px}
  .tm-isls{grid-template-columns:1fr}
  .tm-ohoot{display:none}
}
@media (prefers-reduced-motion:reduce){
  .tm-app,.tm-hoot,.tm-panel,.tm-ohoot,.tm-line,.tm-st,.tm-isl{transition:none!important}
  .tm-st.cur .tm-halo{animation:none}
  .tm-scroll{scroll-behavior:auto}
}