@import url('https://fonts.googleapis.com/css2?family=DM+Sans:wght@400;450;500;600;700&family=Manrope:wght@400;500;600;700;800&display=swap');
:root{--bg:#f5f8f5;--surface:#fff;--ink:#102e25;--muted:#4b655c;--line:#cedbd2;--green:#176548;--bright:#c5f278;--soft:#e5eee7;--hero:#123a2c;--white:#f4f9f5;color-scheme:light}html[data-theme=dark]{--bg:#0d1914;--surface:#14271e;--ink:#edf6ed;--muted:#b1c5b8;--line:#304638;--green:#b7ea7c;--soft:#1d3327;--hero:#143b2c;color-scheme:dark}*{box-sizing:border-box}html{scroll-behavior:smooth;scroll-padding-top:100px}body{margin:0;background:var(--bg);color:var(--ink);font:16px/1.65 'DM Sans',Arial,sans-serif}a{color:inherit;text-decoration:none}button,select{font:inherit}button,a,select{-webkit-tap-highlight-color:transparent}a:focus-visible,button:focus-visible,select:focus-visible,summary:focus-visible{outline:3px solid var(--green);outline-offset:5px}button{cursor:pointer}header{position:sticky;top:0;z-index:20;background:var(--bg);border-bottom:1px solid var(--line)}.nav{max-width:1440px;margin:auto;min-height:88px;padding:18px 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14px;border-radius:100px;font-size:14px}.speaking{background:var(--soft)}.speaking-layout{display:grid;grid-template-columns:1.1fr 1fr;gap:80px}.speaking .eyebrow{color:var(--green);margin-bottom:28px}.topics{list-style:none;padding:0;margin:0}.topics li{border-top:1px solid var(--line);padding:20px 0;display:flex;gap:20px;font-size:19px}.topics li span{color:var(--green);font-size:13px;padding-top:4px}.article-list{display:grid;grid-template-columns:repeat(2,1fr);gap:25px}.article{border:1px solid var(--line);padding:30px;border-radius:4px}.article .eyebrow{font-size:11px;color:var(--muted);margin-bottom:25px}.article h3{font-size:24px;line-height:1.4;letter-spacing:-.5px;font-weight:600}.article p{color:var(--muted)}details{border-top:1px solid var(--line);padding:22px 0}summary{cursor:pointer;display:flex;justify-content:space-between;font-weight:600;list-style:none}summary::after{content:'+';color:var(--green);font-size:23px}details[open] summary::after{content:'−'}details p{color:var(--muted);margin-top:18px}#contact{background:var(--hero);color:var(--white)}#contact .eyebrow{color:var(--bright)}#contact h2{font-size:clamp(38px,5vw,64px)}#contact .lead{color:#c5dacf}.contact-layout{display:grid;grid-template-columns:1.4fr 1fr;gap:70px;align-items:center}.contact-links a{display:block;border-bottom:1px solid #557765;padding:20px 0;font-size:20px;overflow-wrap:anywhere}.contact-links small{display:block;color:#acc6b6;font-size:12px;letter-spacing:1px;text-transform:uppercase;margin-bottom:5px}footer .wrap{display:flex;justify-content:space-between;gap:24px;padding-top:30px;padding-bottom:30px;color:var(--muted);font-size:13px}.skip{position:absolute;top:-100px}.skip:focus{top:10px;left:10px;z-index:99;background:var(--surface);padding:12px}html[lang=zh-CN] h1,html[lang=zh-CN] h2{letter-spacing:0;line-height:1.3}html[lang=zh-CN] h1{font-size:clamp(42px,5.8vw,75px)}@media(max-width:1000px){.nav{gap:16px}.navlinks{gap:15px}.brand{font-size:16px}.hero-bottom{gap:40px}.section-head,.about-body,.engagement{grid-template-columns:1fr 2fr;gap:35px}.cards{gap:14px}.card{padding:24px 18px}.speaking-layout{gap:35px}}@media(max-width:760px){.nav{min-height:74px;flex-wrap:wrap;padding:14px 5%;gap:10px}.brand{margin-right:auto}.controls{gap:8px}.menu{display:block;border:1px solid var(--line);background:transparent;color:var(--ink);width:36px;height:36px;border-radius:4px;font-size:18px}.navlinks{display:none;order:4;width:100%;margin:6px 0 0;padding:14px 0 4px;flex-wrap:wrap}.navlinks.open{display:flex}.navlinks a{padding:5px 0}.hero .wrap{padding-top:55px;padding-bottom:45px}h1{letter-spacing:-2px;margin:25px 0}.hero-bottom{grid-template-columns:1fr;gap:40px}.hero-intro{font-size:18px}.affiliations .wrap{justify-content:flex-start;gap:20px 28px}.affiliations .eyebrow{max-width:none;width:100%}.affiliations strong{font-size:16px}section{padding:65px 0}.section-head,.about-body,.engagement,.speaking-layout,.contact-layout{grid-template-columns:1fr;gap:22px}.section-head{margin-bottom:30px}.profile-note{display:none}.cards,.roles,.article-list{grid-template-columns:1fr}.card .number{margin-bottom:20px}.card h3{font-size:24px}.engagement{gap:10px}.contact-layout{gap:25px}footer .wrap{flex-direction:column;gap:8px}h2{letter-spacing:-1px}.lead{font-size:18px}.eyebrow{letter-spacing:1.4px}.controls select{max-width:90px}}@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}}

.hero-layout{display:grid;grid-template-columns:1.2fr 1fr;gap:65px;align-items:center}.hero h1{font-size:clamp(44px,5.1vw,70px);letter-spacing:-3px}.hero .wrap{padding-top:65px;padding-bottom:65px}.hero-portrait{display:block;width:100%;height:440px;object-fit:cover;object-position:50% 35%;border-radius:5px}.hero-visual .hero-index{margin-top:24px}.hero-visual .hero-index div{padding:10px 0}.hero-visual .hero-index strong{font-size:16px}@media(max-width:1000px){.hero-layout{gap:32px}.hero-portrait{height:370px}.hero h1{font-size:52px;letter-spacing:-2px}}@media(max-width:760px){.hero-layout{grid-template-columns:1fr;gap:35px}.hero .wrap{padding-top:48px;padding-bottom:45px}.hero h1{font-size:clamp(40px,8vw,60px)}.hero-portrait{height:auto;aspect-ratio:4/3;object-position:center}.hero-visual .hero-index{margin-top:22px}}

.conference-block{margin-top:55px}.conference-block>h3{font-size:25px;font-weight:600;letter-spacing:-.5px;margin-bottom:24px}.conference-cards{display:grid;grid-template-columns:1fr 1fr;gap:24px}.conference-card{padding:28px;border:1px solid var(--line);border-radius:4px;background:var(--surface)}.conference-card .eyebrow{font-size:12px;margin-bottom:20px;letter-spacing:1px}.conference-card h4{font:600 25px/1.35 Manrope,Arial,sans-serif;margin:0 0 15px}.conference-card p{color:var(--muted)}@media(max-width:760px){.conference-cards{grid-template-columns:1fr}.conference-block{margin-top:40px}.conference-card{padding:24px}}

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