@import url('https://fonts.googleapis.com/css2?family=DM+Sans:wght@400;450;500;600;700&family=Space+Grotesk:wght@400;500;600;700&display=swap');
:root{--paper:#f7f8fa;--ink:#171a20;--muted:#68707d;--blue:#3046eb;--line:#dce0e8}*{box-sizing:border-box}html{scroll-behavior:smooth;scroll-padding-top:90px}body{margin:0;background:var(--paper);color:var(--ink);font:16px/1.65 'DM Sans',sans-serif}a{color:inherit;text-decoration:none}button,input{font:inherit}button,a,input{touch-action:manipulation}a:focus-visible,button:focus-visible,input:focus-visible{outline:3px solid #3046eb;outline-offset:5px}header{height:86px;display:flex;align-items:center;justify-content:space-between;padding:0 5.5%;border-bottom:1px solid var(--line);background:#f7f8faed;position:sticky;top:0;z-index:10;backdrop-filter:blur(16px)}.brand{font-weight:700;letter-spacing:-.4px;font-size:21px}.brand span{color:var(--blue);padding:0 9px}nav{display:flex;gap:30px;font-size:14px}.nav-contact{font-size:14px;border-bottom:1px solid #aaa;padding:7px 0}h1,h2,h3,blockquote{font-family:'Space Grotesk','DM Sans',sans-serif;line-height:1.12;letter-spacing:-.045em}h2{font-size:clamp(34px,4.2vw,58px);font-weight:500;margin:22px 0}h3{font-size:24px;font-weight:500;letter-spacing:-.025em}p{color:var(--muted)}.hero{min-height:760px;height:calc(100svh - 86px);max-height:1050px;position:relative;overflow:hidden;padding:28px 5.5%}.hero-top,.hero-bottom{display:flex;justify-content:space-between;gap:20px;font-size:12px;letter-spacing:.09em}.hero-top{color:#676e7b}.hero-copy{position:relative;z-index:2;pointer-events:none;padding-top:66px;width:60%}.hero-copy a{pointer-events:auto}.eyebrow,.section-index{font-size:12px;letter-spacing:.13em;font-weight:600}.eyebrow{color:var(--muted)}h1{font-size:clamp(65px,7.8vw,120px);font-weight:500;margin:22px 0;line-height:1.01;letter-spacing:-.065em}h1 span{color:var(--blue)}.intro{font-size:16px;margin:25px 0}.pill{display:inline-flex;gap:40px;align-items:center;border:1px solid #bcc3ce;border-radius:30px;padding:12px 21px;font-size:14px;background:#ffffff70}.pill:hover{background:var(--ink);color:white}.hero-scene{position:absolute;right:-9%;top:8%;width:72%;height:85%}.scene-label{position:absolute;right:8%;bottom:130px;font-size:12px;letter-spacing:.1em}.scene-label small{display:block;margin:5px 0 0 15px;letter-spacing:0;color:var(--muted);font-size:12px}.blue-dot{display:inline-block;width:5px;height:5px;background:var(--blue);border-radius:50%;margin-right:10px}.hero-bottom{position:absolute;bottom:26px;left:5.5%;right:5.5%;border-top:1px solid var(--line);padding-top:20px}.section{padding:105px 7%;border-top:1px solid var(--line)}.section-index{color:var(--blue)}.about{display:grid;grid-template-columns:1fr 2fr;gap:50px;background:white}.about h2{margin-top:0}.about p{max-width:750px}.large{font-size:21px;color:var(--ink)}.muted{color:var(--muted);font-size:16px;margin-left:16px}.roles{display:grid;grid-template-columns:1fr 1fr;gap:35px;margin-top:45px;border-top:1px solid var(--line);padding-top:28px}.roles span,.bridge article>span{font-size:12px;letter-spacing:.12em;color:var(--muted)}.roles h3{font-size:19px;letter-spacing:-.02em;margin:10px 0}.roles p{font-size:14px;margin-top:8px}.section-heading{text-align:center}.research-layout{display:grid;grid-template-columns:1.3fr 1fr;gap:60px;align-items:center}.research-scene{height:470px}.research-buttons{display:flex;gap:9px;flex-wrap:wrap}.research-buttons button,.learning-tabs button{border:1px solid #cdd3df;background:transparent;border-radius:30px;padding:10px 15px;color:#59616e;font-size:14px;cursor:pointer}.research-buttons button[aria-pressed=true],.learning-tabs button[aria-pressed=true]{background:var(--blue);color:white;border-color:var(--blue)}.topic-detail{border-top:1px solid var(--line);margin-top:25px;padding-top:22px;min-height:190px}.topic-detail>span{font-size:12px;color:var(--blue)}.topic-detail h3{margin:8px 0 16px}.topic-detail p{margin:0}.projects{background:white}.split-heading{display:flex;justify-content:space-between;align-items:center;gap:20px}.split-heading>span{font-size:12px;color:var(--muted)}.project-grid{display:grid;grid-template-columns:1fr 1fr;gap:30px;margin-top:35px}.project{border:1px solid var(--line);border-radius:4px;overflow:hidden}.project-visual{height:310px;position:relative;background:#edf0f6}.glyph{background:#eef0fc}.mini-scene{height:100%;width:100%;touch-action:pan-y}.visual-tag{position:absolute;bottom:15px;left:20px;font-size:10px;letter-spacing:.08em;color:#565e71}.project-body{padding:30px}.project-body h3{font-size:30px;margin:15px 0}.tags{display:flex;gap:7px;flex-wrap:wrap;margin-top:25px}.tags span{padding:5px 10px;background:#f2f4f8;font-size:12px;color:#59616e}.glyph-control label{display:flex;justify-content:space-between;font-size:14px}.glyph-control input{width:100%;accent-color:var(--blue)}.glyph-control small{display:block;color:var(--muted);font-size:12px}.philosophy{text-align:center;background:#172337;color:white;padding:100px 6%}.philosophy .section-index{color:#98b1ff}.philosophy p{color:#b8c2d1}.philosophy blockquote{font-size:clamp(36px,5vw,72px);margin:35px 0;font-weight:400}.philosophy em{font-style:normal;color:#9eacff}.word-path{margin-top:50px;display:flex;align-items:center;justify-content:center;gap:20px;flex-wrap:wrap;font-size:12px;letter-spacing:.09em}.word-path span{color:#8193b8}.teaching{text-align:center}.learning-scene{height:220px}.learning-tabs{display:flex;gap:8px;justify-content:center;flex-wrap:wrap}.learning-detail{padding:30px;min-height:185px}.learning-detail>span{color:var(--blue);font-size:12px}.learning-detail h3{margin:10px}.learning-detail p{margin:10px}.courses{border-top:1px solid var(--line);padding-top:30px;display:grid;grid-template-columns:1fr 1fr 1fr 1fr;gap:25px;text-align:left}.courses h3{font-size:20px}.courses p{font-size:14px}.industry{background:white}.bridge{display:flex;align-items:center;justify-content:space-between;margin-top:50px;border-top:1px solid var(--line);border-bottom:1px solid var(--line);padding:40px 0;gap:30px}.bridge-center{text-align:center;color:var(--blue);font-size:60px;line-height:1}.bridge-center span{display:block;font-size:11px;letter-spacing:.13em;line-height:1.8;margin-top:16px}.industry-copy{max-width:770px;margin:35px 0 0}.achievement-grid{display:grid;grid-template-columns:1fr 1fr;gap:12%;margin-top:45px}.achievement-grid h3{font-size:20px}.timeline-item{display:flex;gap:35px;border-top:1px solid var(--line);padding:15px 0}.timeline-item>span{color:var(--blue);font-size:14px;min-width:48px}.timeline-item p{margin:0}.publication-list p{border-top:1px solid var(--line);padding:20px 0;margin:0;font-size:20px;color:var(--ink)}.publication-list p span{display:block;font-size:11px;letter-spacing:.1em;color:var(--muted);margin-bottom:15px}.publication-list a{color:var(--blue);font-size:14px}.lab{display:grid;grid-template-columns:1.2fr 1fr;background:#edf0f8;position:relative;overflow:hidden}.lab h2{font-size:clamp(38px,4.5vw,65px)}.lab h2 span{color:var(--blue)}.lab p{max-width:600px}.lab-text{z-index:1}.lab-scene{height:580px}.lab-motto{margin-top:35px;font-size:14px;color:var(--blue)}.students{text-align:center;background:white}.student-path{display:flex;gap:20px;justify-content:center;align-items:center;flex-wrap:wrap;margin-top:45px}.student-path span{font-size:15px}.student-path b{color:#9aa3b2;font-weight:400}footer{padding:90px 7% 25px;background:#e9ecf4}footer h2{font-size:clamp(44px,6.5vw,92px)}footer h2 span{color:var(--blue)}.footer-links{display:flex;gap:35px;flex-wrap:wrap;margin:40px 0 80px;font-size:15px}.footer-links a:hover{color:var(--blue)}.footer-bottom{display:flex;justify-content:space-between;gap:20px;flex-wrap:wrap;border-top:1px solid #cbd2df;padding-top:25px;font-size:12px;color:#626b7d}canvas{display:block;max-width:100%}.scene-fallback{display:grid;place-items:center;color:var(--blue);height:100%;font-size:20px;text-align:center;padding:30px}@media(min-width:1600px){main{max-width:1800px;margin:auto}}@media(max-width:900px){header{padding:0 5%;height:72px}nav{gap:16px}.nav-contact{display:none}.hero{height:850px;min-height:0}.hero-top{font-size:10px}.hero-top span:last-child{max-width:190px;text-align:right}.hero-copy{padding-top:50px;width:85%}.hero-scene{width:100%;height:65%;right:-24%;top:32%;opacity:.85}.hero-copy .intro{max-width:380px}.scene-label{bottom:110px;right:6%}.section{padding:75px 6%}.about{grid-template-columns:1fr;gap:25px}.research-layout{gap:20px;grid-template-columns:1fr 1fr}.research-scene{height:390px}.split-heading{display:block}.project-body{padding:22px}.project-body h3{font-size:25px}.courses{grid-template-columns:1fr 1fr}.lab{grid-template-columns:1fr}.lab-scene{height:300px}.achievement-grid{gap:40px}.hero-bottom{font-size:10px}}@media(max-width:600px){nav{gap:13px;font-size:12px}nav a:last-child{display:none}.brand{font-size:17px}.hero{height:840px}.hero-top span:last-child{display:none}.hero-copy{padding-top:30px;width:100%}h1{font-size:70px}.eyebrow{font-size:10px}.intro{font-size:14px}.hero-scene{top:43%;right:-10%;height:49%;width:105%}.scene-label{bottom:94px;font-size:10px}.hero-bottom{font-size:9px}.pill{font-size:13px}.section{padding:62px 6%}.roles,.research-layout,.project-grid,.achievement-grid{grid-template-columns:1fr}.research-scene{height:320px}.roles{gap:18px}.muted{display:block;margin-left:0;margin-top:7px}.topic-detail{min-height:180px}.project-grid{gap:25px}.project-visual{height:270px}.philosophy{padding:65px 6%}.philosophy blockquote{font-size:39px}.word-path{gap:12px;font-size:10px}.learning-scene{height:150px}.learning-tabs button{font-size:12px;padding:8px 12px}.learning-detail{padding:25px 0}.courses{gap:15px}.bridge{flex-direction:column;text-align:center;gap:20px}.bridge-center{font-size:45px}.bridge article h3{margin:12px}.bridge-center span{margin-top:5px}.lab-scene{height:280px}.student-path{gap:13px}.student-path span{font-size:13px}.footer-links{gap:20px;margin-bottom:55px}.footer-bottom{font-size:10px}footer{padding-top:65px}.desktop{display:none}}@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}}

/* Profile details */
.education,.expertise{border-top:1px solid var(--line);padding-top:28px;margin-top:28px}.education h3{margin:12px 0;font-size:23px}.education p{margin:8px 0}.text-link{display:inline-block;color:var(--blue);font-size:14px;margin-top:22px}.teaching-principles{display:grid;grid-template-columns:1fr 1fr;gap:45px;max-width:1000px;margin:55px auto 0;text-align:left;border-top:1px solid #44516a;padding-top:28px}.teaching-principles h3{font-size:24px;letter-spacing:-.025em;line-height:1.3}.teaching-principles p{font-size:16px}.emi-note{font-size:14px;text-align:left;margin-top:25px}.industry-projects{display:grid;grid-template-columns:1fr 1fr;gap:25px 50px;margin-top:50px}.industry-projects article{border-top:1px solid var(--line);padding-top:24px}.industry-projects h3{font-size:25px;line-height:1.25}.credential-list{padding-left:20px;color:var(--muted);line-height:2}.bibliography,.patents{margin-top:65px;border-top:1px solid var(--line);padding-top:35px;scroll-margin-top:100px}.publication-row{display:grid;grid-template-columns:65px 1fr;gap:25px;padding:25px 0;border-top:1px solid var(--line)}.publication-row h3{font-family:'DM Sans',sans-serif;font-size:20px;letter-spacing:-.015em;line-height:1.5;margin:0}.publication-row a:hover{color:var(--blue)}.publication-row p{font-size:14px;margin:10px 0 0;overflow-wrap:anywhere}.pub-year{color:var(--blue);font-size:14px;padding-top:4px}.subheading{margin-top:45px}.patent-grid{display:grid;grid-template-columns:1fr 1fr;gap:20px 40px}.patent-grid article{border-top:1px solid var(--line);padding:20px 0}.patent-grid article>span{color:var(--muted);font-size:13px}.patent-grid h3{font-size:19px;line-height:1.65;letter-spacing:0;margin:12px 0}.contact-email{display:inline-block;font-family:'Space Grotesk',sans-serif;font-size:clamp(23px,3vw,38px);color:var(--blue);overflow-wrap:anywhere;max-width:100%}.student-connections{margin-top:35px;font-size:14px}.roles h3{line-height:1.35}@media(max-width:600px){.teaching-principles,.industry-projects,.patent-grid{grid-template-columns:1fr;gap:20px}.publication-row{grid-template-columns:42px 1fr;gap:14px}.publication-row h3{font-size:18px}.bibliography,.patents{margin-top:40px}.teaching-principles h3{font-size:22px}}

/* Publication keyword topology */
.research-buttons button[aria-pressed=true]{background:var(--topic-color);border-color:var(--topic-color)}.topic-detail{border-top-color:var(--topic-color);min-height:330px}.topic-detail>span{color:var(--topic-color)}.paper-keywords{display:flex;flex-wrap:wrap;gap:7px;margin:18px 0}.paper-keywords button{cursor:pointer;border:1px solid #d5dce8;background:transparent;border-radius:16px;padding:5px 10px;color:#57657b;font-size:13px}.paper-keywords button[aria-pressed=true]{border-color:var(--topic-color);color:var(--topic-color);background:#fff}.paper-links{display:flex;flex-wrap:wrap;gap:22px;font-size:14px;color:var(--topic-color);margin:18px 0}.keyword-note{display:block;color:#697387;font-size:12px;line-height:1.6}.research-scene{height:560px;touch-action:pan-y}@media(max-width:600px){.research-scene{height:420px}.topic-detail{min-height:0}}

.research-graph{min-width:0}.research-zoom{display:flex;gap:10px;justify-content:center;align-items:center;margin:10px 0 24px;font-size:13px;color:#53617b}.research-zoom button{background:transparent;border:1px solid #cdd3df;border-radius:20px;padding:5px 13px;cursor:pointer;color:inherit}.research-zoom output{min-width:45px;text-align:center}.research-scene{height:650px}@media(max-width:600px){.research-scene{height:460px}}

/* Keep research selectors anchored while article details change height. */
.research-layout{align-items:start}.research-layout>div:last-child{align-self:start;padding-top:70px}.research-buttons{align-content:flex-start;align-items:flex-start}@media(max-width:600px){.research-layout>div:last-child{padding-top:0}}

/* All article variants reserve one shared, responsive footprint. */
.topic-stack{display:grid;min-width:0;align-items:start;overflow-anchor:none}
.topic-stack>.topic-detail{grid-area:1 / 1;min-width:0}
.topic-stack>.topic-reserve{visibility:hidden;pointer-events:none;user-select:none}
#research{overflow-anchor:none}

/* Thermal view shares the Urban Network neutral backdrop. */
.project-visual.glyph{background:#f5f6f8}

.journal-ranking{display:block;width:fit-content;margin-top:12px;font-size:14px;font-weight:400;line-height:1.6;color:#4058cf}.ranking-note{font-size:14px;line-height:1.7;color:#687181;max-width:780px;margin:16px 0 26px}.contact-email{overflow-wrap:anywhere}

.project-visual.lighting{background:#f5f6f8}.campus-note{font-size:14px!important;line-height:1.6}
.classroom-demo{max-width:1000px;margin:28px auto 22px;background:white;border:1px solid #dce0e8;border-radius:16px;text-align:left;overflow:hidden}.demo-heading{display:flex;justify-content:space-between;gap:12px;padding:18px 22px;border-bottom:1px solid #e5e9ef;font-size:12px;letter-spacing:.08em}.demo-sim{color:#687181}#demo-hint{padding:0 22px;font-size:15px;min-height:48px}.demo-grid{display:grid;grid-template-columns:1.3fr 1fr;gap:24px;padding:0 22px 22px}.demo-main,.demo-side{min-width:0}.classroom-demo [hidden]{display:none!important}#demo-layout{height:200px;background:#f0f3fa;border-radius:10px;padding:22px}#demo-layout>span,.demo-side>div>span{font-size:12px;letter-spacing:.08em;color:#65718a}#demo-layout h3{font-size:26px;margin:14px 0}#demo-layout p{font-size:14px;margin:10px 0}.demo-structure{display:flex;gap:16px;font-size:13px;color:#4058cf}#teaching-room{height:200px;background:#f0f3fa;border-radius:10px}.demo-controls{padding-top:16px}.demo-control-row{display:flex;align-items:center;justify-content:space-between;gap:12px;margin-bottom:12px}.classroom-demo button{border:1px solid #cdd5e5;border-radius:8px;padding:9px 12px;background:white;color:#3148c6;font-size:14px;cursor:pointer}.classroom-demo button[aria-pressed=true],#demo-apply{background:#4058cf;color:white;border-color:#4058cf}.classroom-demo button:disabled{opacity:.45;cursor:default}.classroom-demo label{display:block;font-size:14px;margin-top:12px}.classroom-demo output{float:right;color:#4058cf}.classroom-demo input[type=range]{width:100%;accent-color:#4058cf;margin:12px 0}.demo-auto{display:flex!important;gap:8px;align-items:center}.demo-devices{display:flex;gap:8px;margin-top:12px}#demo-status{border-left:3px solid #4058cf;padding-left:16px}#demo-status strong{display:block;font-weight:500;font-size:27px;margin-top:8px}#demo-status p{font-size:14px;margin:6px 0}.demo-metrics{display:flex;gap:24px;font-size:13px;color:#687181;margin:20px 0}.demo-metrics strong{display:block;color:#171a20;font-size:20px;font-weight:400}.demo-chart>div{display:grid;grid-template-columns:65px 1fr 56px;align-items:center;gap:8px;margin:12px 0;font-size:12px}.demo-chart i{display:block;background:#edf0f6;height:9px;border-radius:5px;overflow:hidden}.demo-chart b{display:block;height:100%;background:#4058cf;transition:width .2s}#demo-day-bar{background:#c9912e}#demo-sync,#demo-ai{border-top:1px solid #e5e9ef;padding-top:15px;margin-top:20px}#demo-sync p,#demo-ai p{font-size:14px}#demo-sync output{display:block;float:none;font-size:13px;margin-top:10px}#demo-ai small{display:block;font-size:12px;line-height:1.5;color:#687181;margin-top:12px}.learning-summary{display:grid;grid-template-columns:1fr 1fr;gap:30px;max-width:900px;margin:auto;text-align:left}.learning-summary span{font-size:12px;letter-spacing:.08em;color:#4058cf}.learning-summary p{font-size:16px}.learning-detail{min-height:250px}.teaching>p{margin-bottom:20px}@media(max-width:600px){.teaching h2{font-size:30px;margin:16px 0}.teaching>p{font-size:16px}.demo-grid{grid-template-columns:1fr;gap:20px;padding:0 16px 18px}.demo-heading{padding:14px 16px;font-size:10px}#demo-hint{padding:0 16px;min-height:0;font-size:14px}#demo-layout,#teaching-room{height:180px}.learning-summary{grid-template-columns:1fr;gap:12px}.learning-detail{padding:22px 0}.learning-detail h3{margin:14px 0 22px}.learning-tabs{gap:7px}.learning-tabs button{font-size:13px}.classroom-demo{margin-top:22px}.demo-side{border-top:1px solid #e5e9ef;padding-top:16px}}@media(prefers-reduced-motion:reduce){.demo-chart b{transition:none}}

/* Teaching: persistent spatial view beside the instruments. */
.classroom-demo{max-width:1120px}.demo-grid{grid-template-columns:minmax(0,1.35fr) minmax(300px,1fr);gap:0;padding:0;align-items:stretch}.demo-main{background:#f0f3f9;display:flex;flex-direction:column;position:relative;align-self:start;min-height:520px;border-right:1px solid #dce0e8}.demo-room-label{padding:22px 24px 0;font-size:12px;letter-spacing:.09em;color:#64718a}#teaching-room{position:relative;height:440px;flex:none;min-height:0;overflow:hidden;contain:size layout;background:transparent;touch-action:pan-y}#teaching-room canvas{position:absolute;inset:0;display:block;width:100%;height:100%;max-width:100%}.demo-room-footer{display:flex;justify-content:space-between;gap:12px;padding:16px 24px 24px;font-size:14px;color:#64718a}#demo-room-state{color:#4058cf}.demo-side{padding:24px;align-self:start}#demo-status{display:flex;align-items:center;gap:18px;padding:0;border:0}#demo-status strong{font-size:24px}#demo-status span{font-size:12px;letter-spacing:.08em;color:#64718a}.demo-gauge{width:100px;height:100px;position:relative;flex:none}.demo-gauge svg{width:100%;height:100%}.demo-gauge output{position:absolute;inset:0;display:grid;place-items:center;float:none;font-size:24px;color:#1b2335}.demo-metrics{display:grid;grid-template-columns:1fr 1fr;gap:12px;margin:20px 0}.demo-metrics>span{padding:14px;background:#f4f6fa;border-radius:10px;font-size:14px}.demo-metrics strong{font-size:28px;margin-top:8px}.demo-metrics small{font-size:14px}.demo-chart>div{grid-template-columns:65px minmax(0,1fr) 64px;font-size:14px}.demo-chart i{height:10px}.demo-controls{border-top:1px solid #e5e9ef;margin-top:20px;padding-top:20px}.classroom-demo button{min-height:44px}.classroom-demo input[type=range]{min-height:24px;cursor:pointer}.classroom-demo input[type=checkbox]{width:18px;height:18px;accent-color:#4058cf}#demo-hint{border-top:1px solid #e5e9ef;padding:16px 24px;margin:0;min-height:0;font-size:14px;color:#64718a;line-height:1.6}
@media(max-width:760px){.demo-grid{grid-template-columns:minmax(0,1fr)}.demo-main{min-height:0;border-right:0;border-bottom:1px solid #dce0e8}.demo-room-label{padding:18px 18px 0}#teaching-room{height:320px;min-height:0;flex:none}.demo-room-footer{padding:10px 18px 18px;font-size:13px}.demo-side{padding:20px;border-top:0}.demo-heading{font-size:11px}#demo-hint{padding:16px 20px}}

.about-portrait{display:block;width:228px;max-width:100%;height:auto;margin-top:32px;border-radius:12px;border:1px solid #e2e6ed;box-shadow:0 8px 24px #182c4b0a}.about-aside{min-width:0}@media(max-width:800px){.about-aside{display:flex;align-items:center;justify-content:space-between;gap:24px}.about-portrait{width:132px;flex-shrink:0;margin-top:0;border-radius:8px}}

/* Course navigation precedes changing content, so expansion cannot move it. */
.teaching{overflow-anchor:none}.teaching .learning-tabs{max-width:1120px;margin:28px auto 0;align-items:center}.teaching .learning-tabs button{flex:0 0 auto;min-height:44px;white-space:nowrap}.teaching .classroom-demo{margin-top:18px}.learning-tabs button:focus-visible{outline:2px solid #4058cf;outline-offset:3px}
@media(max-width:760px){.teaching .learning-tabs{flex-wrap:nowrap;justify-content:flex-start;overflow-x:auto;overscroll-behavior-x:contain;gap:8px;padding:4px 3px 12px;margin-top:22px;scroll-padding-inline:3px;scrollbar-width:thin;scrollbar-color:#b3bdd7 transparent}.teaching .learning-tabs button{font-size:14px;padding:10px 15px}.teaching .classroom-demo{margin-top:12px}}

/* Stage guidance and extensions stay close to the course selector and room. */
.teaching>#demo-hint{max-width:1120px;box-sizing:border-box;margin:8px auto 0;padding:0 12px;min-height:3.2em;border:0;text-align:center;font-size:14px;line-height:1.6;color:#64718a}.teaching .classroom-demo{margin-top:8px}.demo-main{min-height:0}#teaching-room{height:320px}.demo-extras{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:16px;padding:0 20px 20px}.demo-extras:has(>div[hidden]):not(:has(>div:not([hidden]))){display:none}.demo-extras>div:only-child,.demo-extras>div:first-child:has(+[hidden]),.demo-extras>div[hidden]+div{grid-column:1/-1}.demo-extras #demo-sync,.demo-extras #demo-ai{margin:0;padding:14px 0 0;border-top:1px solid #dce0e8;min-width:0}.demo-extras>div>span{font-size:12px;letter-spacing:.08em;color:#64718a}.demo-extras p{margin:10px 0;line-height:1.5}.demo-extras #demo-applied:empty{display:none}.demo-extras #demo-applied{font-size:13px;color:#4058cf}
@media(max-width:760px){.teaching>#demo-hint{min-height:4.8em;padding:0 4px}.demo-extras{grid-template-columns:1fr;gap:14px;padding:0 18px 18px}#teaching-room{height:300px}}

/* Explicit theme switch: light remains the default on every visit. */
:root{color-scheme:light}#theme-toggle{display:inline-flex;align-items:center;justify-content:center;gap:7px;flex-shrink:0;min-width:78px;min-height:42px;padding:7px 12px;border:1px solid var(--line);border-radius:24px;background:transparent;color:var(--ink);cursor:pointer;font-size:13px}#theme-icon{font-size:22px;line-height:1}header{gap:18px}
:root[data-theme=dark]{color-scheme:dark;--paper:#111722;--ink:#edf2fa;--muted:#aeb9cb;--blue:#97a6ff;--line:#344155}
[data-theme=dark] header{background:#111722ed}
[data-theme=dark] :is(.about,.projects,.industry,.students,.classroom-demo){background:#182130}
[data-theme=dark] :is(.lab,footer){background:#151e2d}
[data-theme=dark] :is(.project-visual,.project-visual.glyph,.project-visual.lighting,.demo-main){background:#202c3e}
[data-theme=dark] :is(.hero-top,.footer-bottom,.visual-tag,.keyword-note,.ranking-note,.research-zoom,.demo-sim,.demo-room-label,.demo-room-footer,.demo-metrics,.demo-extras>div>span,#demo-status span,#demo-ai small,.teaching>#demo-hint){color:#b8c5da}
[data-theme=dark] :is(.tags span,.demo-metrics>span){background:#27344a;color:#cbd6e9}
[data-theme=dark] :is(.demo-metrics strong,.demo-gauge output){color:var(--ink)}
[data-theme=dark] :is(.research-buttons button,.learning-tabs button,.paper-keywords button){color:#d1daea;border-color:#53617a}
[data-theme=dark] .learning-tabs button[aria-pressed=true]{background:#4058cf;color:white;border-color:#7184ff}
[data-theme=dark] .research-buttons button[aria-pressed=true]{background:var(--topic-color);color:white;border-color:color-mix(in srgb,var(--topic-color),white 35%)}
[data-theme=dark] :is(.topic-detail>span,.paper-links){color:color-mix(in srgb,var(--topic-color),white 45%)}
[data-theme=dark] .paper-keywords button[aria-pressed=true]{background:#27344a;color:color-mix(in srgb,var(--topic-color),white 50%);border-color:currentColor}
[data-theme=dark] :is(.journal-ranking,.classroom-demo output,.learning-summary span,#demo-room-state,.demo-extras #demo-applied){color:#a5b3ff}
[data-theme=dark] .classroom-demo button{background:#243148;color:#d7e0ff;border-color:#53617a}
[data-theme=dark] :is(.classroom-demo button[aria-pressed=true],#demo-apply){background:#4058cf;color:white;border-color:#7587ff}
[data-theme=dark] :is(.classroom-demo,.demo-main,.demo-heading,.demo-controls,.demo-extras #demo-sync,.demo-extras #demo-ai,.footer-bottom,.about-portrait){border-color:var(--line)}
[data-theme=dark] .demo-chart i{background:#344155}[data-theme=dark] .demo-chart b{background:#8c9eff}[data-theme=dark] #demo-day-bar{background:#e7b65d}
[data-theme=dark] .demo-gauge circle:first-child{stroke:#344155}[data-theme=dark] #demo-gauge-arc{stroke:#8c9eff}
[data-theme=dark] .classroom-demo input{accent-color:#9aaaff}
[data-theme=dark] .pill{background:#243148;border-color:#53617a}[data-theme=dark] .pill:hover{background:#334563;color:white}
[data-theme=dark] :is(a,button,input):focus-visible{outline-color:#a5b3ff}
@media(max-width:600px){header{height:auto;min-height:98px;flex-wrap:wrap;padding:9px 5%;gap:5px 12px}header nav{order:3;width:100%;justify-content:center;gap:24px;font-size:12px}header nav a:last-child{display:inline}#theme-toggle{min-width:44px;padding:6px 10px}.theme-text{display:none}html{scroll-padding-top:115px}}

#language-toggle{display:inline-flex;align-items:center;justify-content:center;flex-shrink:0;min-height:42px;padding:7px 12px;border:1px solid var(--line);border-radius:24px;background:transparent;color:var(--ink);cursor:pointer;font-size:13px;white-space:nowrap}header{gap:12px}header nav{margin-left:auto}html[lang=zh-Hant] body{font-family:'DM Sans','PingFang TC','Microsoft JhengHei',sans-serif}html[lang=zh-Hant] :is(h1,h2,h3,blockquote){letter-spacing:0;line-height:1.35}html[lang=zh-Hant] .hero-copy h1{font-size:clamp(58px,6.5vw,100px)}html[lang=zh-Hant] .hero-copy{width:65%}html[lang=zh-Hant] .learning-detail h3{line-height:1.4}@media(max-width:1100px){.nav-contact{display:none}}@media(max-width:600px){header nav{margin-left:0;gap:22px}.brand{margin-right:auto}#language-toggle{padding:7px 10px;font-size:12px}html[lang=zh-Hant] .hero-copy{width:100%}html[lang=zh-Hant] .hero-copy h1{font-size:58px}}

@media(max-width:600px){html[lang=zh-Hant] .hero-copy h1{font-size:clamp(36px,13vw,58px)}}