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/* =========================================================================
 * Restored sections (merged from the full-content version)
 * Dynamics · Toolkit · Trajectory · NOW · Join · Collaboration
 * ========================================================================= */
.dynamics,.toolkit,.trajectory,.join,.collab{border-top:1px solid var(--line);padding-top:105px;padding-bottom:110px}

/* ---------- From Light to Dynamics ---------- */
.dynamics-grid{display:grid;grid-template-columns:repeat(6,1fr);border-top:1px solid var(--line);margin-top:62px}
.dyn-cell{position:relative;padding:24px 14px 20px;border-right:1px solid var(--soft-line);transition:background .25s}
.dyn-cell:last-child{border-right:0}
.dyn-cell:hover{background:rgba(140,229,221,.03)}
.dyn-cell canvas{width:100%;height:110px;margin-bottom:14px}
.dyn-idx{font:400 9px/1 var(--mono);color:var(--signal);letter-spacing:.12em}
.dyn-cell h4{font-size:14px;margin:8px 0 4px;font-weight:500}
.dyn-cell p{font-size:11px;color:var(--muted);margin:0;line-height:1.45}

/* ---------- Scientific Toolkit ---------- */
.toolkit-grid{margin-top:62px;display:grid;grid-template-columns:repeat(4,1fr);gap:1px;background:var(--line);border:1px solid var(--line)}
.toolkit-panel{background:var(--ink);padding:26px;transition:background .25s}
.toolkit-panel:hover{background:var(--surface)}
.tk-code{font:400 9px/1 var(--mono);color:var(--dim);letter-spacing:.16em}
.toolkit-panel h3{font-size:16px;font-weight:500;margin:10px 0 18px}
.tk-items{display:flex;flex-direction:column;gap:9px}
.tk-item{font-size:12.5px;color:var(--muted)}
.tk-item:before{content:"";display:inline-block;width:5px;height:5px;border:1px solid var(--signal);border-radius:50%;margin-right:9px;vertical-align:1px}

/* ---------- Research Trajectory ---------- */
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.trajectory-intro>p:not(.eyebrow){color:var(--muted);margin:20px 0 0}
.trajectory-track{display:grid;grid-template-columns:repeat(7,1fr);gap:12px;margin-top:64px;position:relative;padding-top:34px}
.trajectory-track:before{content:"";position:absolute;left:3%;right:3%;top:9px;height:1px;background:var(--soft-line)}
.traj-phase{position:relative}
.tp-dot{position:absolute;top:-30px;left:0;width:13px;height:13px;border:1px solid var(--line);border-radius:50%;background:var(--ink)}
.traj-phase.current .tp-dot{border-color:var(--signal);box-shadow:0 0 0 4px rgba(140,229,221,.1)}
.traj-phase.future .tp-dot{border-style:dashed}
.tp-tag{font:400 9px/1 var(--mono);color:var(--dim);letter-spacing:.14em}
.traj-phase h4{font-size:13.5px;font-weight:500;margin:8px 0 5px;line-height:1.35}
.traj-phase.current h4{color:var(--signal)}
.traj-phase p{font-size:11px;color:var(--muted);line-height:1.5;margin:0}

/* ---------- NOW ---------- */
.now-panel{border-top:1px solid var(--line);margin-top:70px;padding-top:34px}
.now-head{display:flex;align-items:baseline;gap:16px}
.now-label{font:500 16px/1 var(--mono);color:var(--signal);letter-spacing:.3em}
.now-year{font:400 12px/1 var(--mono);color:var(--dim);letter-spacing:.14em}
.now-statement{font-size:clamp(18px,2.2vw,26px);line-height:1.45;font-weight:500;max-width:820px;margin:20px 0 26px}
.now-tags{display:flex;flex-wrap:wrap;gap:10px}
.now-tag{font:400 10px/1 var(--mono);letter-spacing:.08em;color:var(--signal);border:1px solid var(--line);border-radius:99px;padding:9px 15px}

/* ---------- Join the Lab ---------- */
.join-grid{display:grid;grid-template-columns:1fr 1fr;gap:clamp(30px,5vw,70px);align-items:start}
.join-copy h2{font-size:clamp(24px,2.8vw,38px)}
.join-sub{color:var(--muted);margin:22px 0 30px;max-width:480px}
.join-lists{display:flex;flex-direction:column;gap:36px}
.join-lists h3{font:500 11px/1.3 var(--mono);letter-spacing:.1em;color:var(--signal);margin:0 0 18px}
.join-chips{display:flex;flex-wrap:wrap;gap:9px}
.join-chip{font:400 11px/1 var(--mono);letter-spacing:.05em;color:var(--muted);border:1px solid var(--soft-line);border-radius:99px;padding:8px 13px;transition:color .2s,border-color .2s}
.join-chip:hover{color:var(--signal);border-color:var(--signal)}

/* ---------- Collaboration ---------- */
.collab-head>p:not(.eyebrow){color:var(--muted);margin:20px 0 0}
.collab-areas{display:grid;grid-template-columns:repeat(3,1fr);gap:1px;background:var(--line);border:1px solid var(--line);margin-top:55px}
.collab-area{background:var(--ink);padding:24px;font-size:14px;transition:background .25s}
.collab-area:hover{background:var(--surface)}
.collab-area span:before{content:"";display:inline-block;width:6px;height:6px;border:1px solid var(--signal);border-radius:50%;margin-right:11px;vertical-align:1px}
.collab-cta{color:var(--muted);margin-top:26px}

/* ---------- Publications: restored metadata ---------- */
.pub-topic{font:400 9px/1 var(--mono);letter-spacing:.14em;color:var(--signal);text-transform:uppercase;margin:0 0 10px;display:inline}
.pub-role{font:400 9px/1 var(--mono);letter-spacing:.1em;color:var(--dim);border:1px solid var(--soft-line);border-radius:99px;padding:4px 9px;margin-left:10px;text-transform:uppercase;display:inline-block;vertical-align:1px}
.pub-authors{color:var(--muted);font-size:11px;margin:8px 0 0}
.pub-authors .pub-self{color:var(--text);font-weight:600}
.pub-found{margin-top:12px;font-size:12px;color:var(--muted);line-height:1.65}
.pub-found-label{font:400 9px/1 var(--mono);letter-spacing:.14em;color:var(--signal);margin-right:9px}

/* ---------- Research rows: restored question line ---------- */
.row-question{line-height:1.6}
.research-row .row-detail{line-height:1.75}

/* ---------- Responsive (merged breakpoints) ---------- */
@media(max-width:850px){
  .dynamics-grid{grid-template-columns:repeat(3,1fr)}
  .dyn-cell:nth-child(3n){border-right:0}
  .dyn-cell:nth-child(n+4){border-top:1px solid var(--soft-line)}
  .toolkit-grid{grid-template-columns:repeat(2,1fr)}
  .trajectory-track{grid-template-columns:repeat(2,1fr);row-gap:30px}
  .trajectory-track:before{display:none}
  .join-grid{grid-template-columns:1fr;gap:40px}
  .collab-areas{grid-template-columns:repeat(2,1fr)}
}
@media(max-width:500px){
  .dynamics,.toolkit,.trajectory,.join,.collab{padding-top:72px;padding-bottom:75px}
  .dynamics-grid{grid-template-columns:repeat(2,1fr)}
  .dyn-cell:nth-child(3n){border-right:1px solid var(--soft-line)}
  .dyn-cell:nth-child(2n){border-right:0}
  .dyn-cell:nth-child(n+3){border-top:1px solid var(--soft-line)}
  .toolkit-grid{grid-template-columns:1fr}
  .trajectory-track{grid-template-columns:1fr}
  .collab-areas{grid-template-columns:1fr}
  .now-head{flex-direction:column;gap:6px;align-items:flex-start}
}

/* ---------- Dynamics chain arrows (light → understanding) ---------- */
.dyn-cell::after{
  content:"";
  position:absolute;
  right:-7px;top:42%;
  width:10px;height:10px;
  border-top:1px solid var(--signal);
  border-right:1px solid var(--signal);
  transform:rotate(45deg);
  z-index:2;
  opacity:.9;
  pointer-events:none;
}
.dyn-cell:last-child::after{display:none}
@media(max-width:850px){
  .dyn-cell::after{display:none}
  .dyn-cell:nth-child(3n+1)::after,.dyn-cell:nth-child(3n+2)::after{display:block}
  .dyn-cell:nth-child(3n)::after{display:none}
}
@media(max-width:500px){
  .dyn-cell:nth-child(3n+1)::after,.dyn-cell:nth-child(3n+2)::after{display:none}
  .dyn-cell:nth-child(2n+1)::after{display:block}
  .dyn-cell:nth-child(2n)::after{display:none}
}

/* =========================================================================
 * Theme system — dark (default) / light toggle, follows prefers-color-scheme
 * ========================================================================= */
:root{color-scheme:dark}
html[data-theme="light"]{color-scheme:light}

/* ---------- Light theme tokens ---------- */
html[data-theme="light"]{
  --ink:#F0EFEA;        /* 淡雅米黄（原版背景） */
  --surface:#FCFBF6;    /* 米白表面 */
  --line:#DCD8CC;
  --soft-line:#E9E6DB;
  --text:#23241F;       /* 暖墨 */
  --muted:#5E6159;
  --dim:#95978E;
  --signal:#0E7C6C;     /* deeper teal for contrast on light */
}

/* ---------- Hard-coded colour overrides (light) ---------- */
html[data-theme="light"] .hero-statement{color:#3a3f3c}
html[data-theme="light"] .question-statement{color:#303633}
html[data-theme="light"] .research-row p{color:#39403c}
html[data-theme="light"] .instrument-label{color:#454b48}
html[data-theme="light"] .site-header.scrolled{background:rgba(240,239,234,.92)}
html[data-theme="light"] .mobile-nav{background:rgba(240,239,234,.98)}
html[data-theme="light"] .skip-link{color:#0a3a36}
html[data-theme="light"] .hero-instrument{background:rgba(238,236,228,.55)}
html[data-theme="light"] .page-noise{opacity:.06}
html[data-theme="light"] .research-row:hover{background:rgba(14,131,116,.045)}
html[data-theme="light"] .dyn-cell:hover{background:rgba(14,131,116,.04)}
html[data-theme="light"] .traj-phase.current .tp-dot{box-shadow:0 0 0 4px rgba(14,131,116,.14)}
html[data-theme="light"] .loop-node i{background:var(--ink)}

/* ---------- Smooth theme transition ---------- */
body,.site-header,.hero-instrument,.mobile-nav,.projects,.toolkit-panel,.collab-area{transition:background-color .3s var(--ease, ease),color .3s var(--ease, ease),border-color .3s var(--ease, ease)}

/* ---------- Theme toggle button ---------- */
.theme-button{background:none;border:1px solid var(--soft-line);border-radius:50%;width:30px;height:30px;display:flex;align-items:center;justify-content:center;cursor:pointer;color:var(--text);transition:color .2s,border-color .2s}
.theme-button:hover{color:var(--signal);border-color:var(--signal)}
.theme-button svg{width:14px;height:14px;display:block}
.th-moon{display:none}
html[data-theme="light"] .th-sun{display:none}
html[data-theme="light"] .th-moon{display:block}
@media(max-width:500px){.theme-button{width:28px;height:28px}}

/* ---------- Toggle buttons: active/highlight states ---------- */
.language-button{display:flex;align-items:center;gap:6px;border:1px solid var(--soft-line);border-radius:99px;padding:6px 12px;color:var(--muted);transition:color .2s,border-color .2s}
.language-button:hover{color:var(--text);border-color:var(--line)}
.language-button b{color:var(--signal);font-weight:500}
.language-button .sep{opacity:.4}
.theme-button.active{border-color:var(--signal);color:var(--signal)}
.theme-button.active:hover{color:var(--signal);border-color:var(--signal)}
@media(max-width:500px){.language-button{padding:5px 9px;font-size:11px}}