:root{--ink:#102f47;--accent:#137469;--paper:#fff;--muted:#546671;--line:#dbe3e6}*{box-sizing:border-box}html{scroll-behavior:smooth;scroll-padding-top:110px}body{margin:0;color:var(--ink);background:var(--paper);font-family:"Microsoft YaHei","PingFang SC",sans-serif;font-size:16px;line-height:1.8}a{color:inherit;text-decoration:none}button,summary,a{-webkit-tap-highlight-color:transparent}a:focus-visible,button:focus-visible,summary:focus-visible{outline:3px solid #d09e35;outline-offset:6px}.skip{position:fixed;top:-80px;background:white;padding:12px;z-index:100}.skip:focus{top:0}header{padding:25px 5%;display:flex;justify-content:space-between;align-items:center;gap:30px;background:white;position:sticky;top:0;z-index:10;border-bottom:1px solid #edf0f2}.brand{line-height:1.4;display:block}.wordmark{font-family:"Songti SC",SimSun,serif;font-size:28px;font-weight:bold;letter-spacing:2px}.wordmark span{font-size:21px;letter-spacing:1px}.brand small{display:block;font-size:10px;letter-spacing:2.6px;margin-top:5px}nav{display:flex;gap:32px;align-items:center;font-size:14px}nav a:hover{color:var(--accent)}.nav-contact{border-left:1px solid var(--line);padding-left:30px}.nav-contact span{margin-left:18px}.menu{display:none}.hero{background:var(--ink);color:white;position:relative;overflow:hidden;display:flex;min-height:630px}.hero-inner{padding:78px 0 28px 7%;width:76%;position:relative;z-index:1}.eyebrow{font-size:12px;letter-spacing:2px;font-weight:600;margin:0 0 22px}.hero .eyebrow{color:#95c8c6;font-size:14px}.hero h1{font-family:"Songti SC",SimSun,serif;font-size:clamp(40px,4.5vw,70px);font-weight:500;line-height:1.4;letter-spacing:3px;margin:0 0 24px}.hero h1 span{color:#65b4a7}.hero-desc{font-size:18px;color:#c3d5de;line-height:1.9}.hero-actions{display:flex;gap:32px;align-items:center;margin:34px 0 60px}.button{padding:12px 22px;display:inline-flex;align-items:center;justify-content:space-between;gap:34px;font-size:14px;font-weight:600}.light{background:white;color:var(--ink)}.dark{background:var(--ink);color:white}.button:hover{background:#16756d;color:white}.text-link{font-size:14px}.text-link span{margin-left:18px}.hero-bottom{display:flex;gap:20px;justify-content:space-between;font-size:12px;color:#a1bac9;border-top:1px solid #365266;padding-top:20px;letter-spacing:1px}.hero-side{position:absolute;right:4%;top:14px;bottom:20px;display:flex;flex-direction:column;align-items:center;justify-content:center;color:#ffffff0a;font-family:SimSun,serif;font-size:235px;line-height:1.03;border-left:1px solid #ffffff0e;width:27%}.hero-side small{font-family:sans-serif;color:#8fb0c0;font-size:12px;letter-spacing:7px;margin-top:25px}.section{padding:90px 7%}h2{font-family:"Songti SC",SimSun,serif;font-weight:500;font-size:38px;line-height:1.5;letter-spacing:1px;margin:0}p{margin:0 0 20px}.about{display:grid;grid-template-columns:1fr 1.25fr;gap:8%}.section .eyebrow{color:var(--accent)}.about-copy>p{color:var(--muted)}.about-copy .lead{color:var(--ink);font-size:21px;line-height:1.7}.milestones{display:grid;grid-template-columns:1fr 1fr;gap:28px;border-top:1px solid var(--line);margin:30px 0 16px;padding-top:22px}.milestones strong{font-family:Georgia,serif;font-size:38px;font-weight:400}.milestones strong span{font-family:sans-serif;font-size:14px;margin-left:6px}.milestones p{font-size:14px;color:var(--muted);margin-top:8px}.source-link{font-size:12px;color:var(--muted);text-decoration:underline;text-underline-offset:5px}.photo-section{display:grid;grid-template-columns:1.3fr 1fr;margin:0 7%;background:#eff4f5}.photo-section figure{margin:0;position:relative;min-height:365px}.photo-section img{display:block;width:100%;height:100%;object-fit:cover}.photo-section figcaption{position:absolute;bottom:0;padding:40px 24px 14px;background:linear-gradient(transparent,#0b223aca);color:#fff;font-size:12px;width:100%}.photo-caption{padding:42px;display:flex;flex-direction:column;justify-content:center}.photo-caption .eyebrow{color:var(--accent)}.photo-caption h2{font-size:31px}.photo-caption p{font-size:15px;color:var(--muted);margin-top:20px}.photo-caption a{font-size:14px;text-decoration:underline;text-underline-offset:6px}.section-top{display:flex;justify-content:space-between;align-items:flex-end;gap:30px;margin-bottom:42px}.section-top>p{color:var(--muted);font-size:15px;margin:0}.focus-grid{display:grid;grid-template-columns:repeat(3,1fr);border-top:1px solid var(--line)}.focus-grid article{padding:30px 28px 0 0}.focus-grid article+article{border-left:1px solid var(--line);padding-left:28px}.number{font:italic 26px Georgia,serif;color:var(--accent)}h3{font-size:23px;font-weight:500;margin:16px 0}.focus-grid p{color:var(--muted);font-size:16px}.tags{font-size:13px;color:var(--accent)}.study{background:#edf3f3}.study-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:22px}.study-grid article{background:white;border-top:3px solid var(--accent);padding:30px 26px;align-self:start}.study-label{font-size:12px;color:var(--accent);letter-spacing:2px}.study-grid h3{font-size:22px}.study-grid p{font-size:15px;color:var(--muted)}details{border-top:1px solid var(--line);margin-top:24px}summary{cursor:pointer;list-style:none;font-size:14px;padding-top:18px;display:flex;justify-content:space-between;gap:16px}summary::-webkit-details-marker{display:none}details[open] summary span{transform:rotate(45deg)}details>div{padding-top:18px}details>div p{font-size:14px}details>div p:last-child{margin-bottom:0}.study-note{font-size:13px;color:var(--muted);margin:26px 0 0}.contact{display:grid;grid-template-columns:1fr 1fr;gap:8%;align-items:center}.contact>div>p:not(.eyebrow){color:var(--muted)}.contact-note{font-size:13px;margin-top:20px;margin-bottom:0}footer{padding:40px 7%;border-top:1px solid var(--line);display:flex;justify-content:space-between;gap:30px;flex-wrap:wrap}footer strong{font-family:SimSun,serif;font-size:20px}footer p{font-size:13px;color:var(--muted);margin:6px 0 0}.footer-links{display:flex;gap:30px;font-size:14px}.footer-note{width:100%;padding-top:22px;border-top:1px solid #edf0f2;font-size:12px}@media(min-width:1600px){header,.section,footer{padding-left:max(7%,calc((100% - 1400px)/2));padding-right:max(7%,calc((100% - 1400px)/2))}}@media(max-width:950px){header{padding:20px 5%}.wordmark{font-size:24px}.wordmark span{font-size:18px}nav{gap:18px}.nav-contact{display:none}.section{padding:65px 6%}.about{gap:6%}h2{font-size:32px}.photo-caption{padding:28px}.photo-caption h2{font-size:26px}.study-grid{gap:14px}.study-grid article{padding:24px 20px}.study-grid h3{font-size:20px}.hero-inner{width:90%}.hero-side{right:0}.hero-bottom{max-width:85%}}@media(max-width:650px){html{scroll-padding-top:95px}header{padding:17px 6%}.wordmark{font-size:23px;letter-spacing:0}.wordmark span{font-size:16px}.brand small{font-size:8px;letter-spacing:1.7px}.menu{display:block;background:transparent;border:1px solid var(--line);padding:8px 10px;color:var(--ink);font-size:14px}nav{display:none;position:absolute;top:100%;left:0;right:0;background:white;padding:18px 6%;box-shadow:0 10px 20px #102f4710}nav.open{display:flex;flex-direction:column;align-items:stretch;gap:0}nav a{padding:10px 0}.hero{min-height:auto}.hero-inner{padding:58px 6% 24px;width:100%}.hero h1{font-size:37px;letter-spacing:1px}.hero .eyebrow{font-size:12px}.hero-desc{font-size:16px}.hero-side{font-size:160px;right:-90px;opacity:.7;width:65%}.hero-side small{display:none}.hero-actions{gap:20px;margin:30px 0 48px}.hero-bottom{display:block;max-width:none;font-size:10px}.hero-bottom span{display:block;margin-top:6px}.section{padding:55px 6%}.about{display:block}.section-heading{margin-bottom:25px}.about-copy .lead{font-size:19px}.milestones{gap:22px}.milestones strong{font-size:34px}.photo-section{margin:0 6%;display:block}.photo-section figure{min-height:0}.photo-section img{height:auto;aspect-ratio:1.35;object-fit:cover}.photo-caption{padding:28px}.photo-caption h2 br{display:none}.photo-caption h2{font-size:27px}.section-top{display:block;margin-bottom:28px}.section-top>p{margin-top:18px}.focus-grid,.study-grid{grid-template-columns:1fr}.focus-grid article{padding:24px 0}.focus-grid article+article{border-left:0;border-top:1px solid var(--line);padding-left:0}.focus-grid article:last-child{padding-bottom:0}.focus-grid h3{display:inline-block;margin:0 0 12px 18px}.focus-grid p{margin-bottom:12px}.study-grid{gap:18px}.study-grid article{padding:26px}.contact{display:block}.contact>div+div{margin-top:28px}footer{padding:30px 6%}.footer-links{width:100%}.footer-note{margin:0}}@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}}
/* Language navigation and English typography */
header{gap:20px}.brand{margin-right:auto;min-width:0}header nav{order:2}.language-switch{order:3;flex-shrink:0;font-size:14px;border:1px solid var(--line);padding:7px 12px;line-height:1.5}.language-switch:hover{color:var(--accent);border-color:var(--accent)}.menu{order:4;flex-shrink:0}
html[lang="en"] body{font-family:Arial,Helvetica,sans-serif}html[lang="en"] .wordmark{font-family:Georgia,serif;font-size:24px;letter-spacing:0;display:block}html[lang="en"] .wordmark span{display:block;font-size:17px;letter-spacing:.3px}html[lang="en"] .brand small{font-size:10px;letter-spacing:1.3px}html[lang="en"] h1,html[lang="en"] h2{font-family:Georgia,serif;letter-spacing:-.02em}html[lang="en"] .hero h1{font-size:clamp(36px,4.3vw,64px);line-height:1.2;max-width:950px}html[lang="en"] .hero-desc{max-width:650px}html[lang="en"] .hero-side{font-family:Georgia,serif;font-size:clamp(36px,6vw,90px);gap:36px;letter-spacing:-.04em}html[lang="en"] .hero-side small{font-size:10px;letter-spacing:1.2px;max-width:80%;text-align:center}html[lang="en"] .hero .eyebrow{font-size:12px;max-width:85%}html[lang="en"] .hero-bottom{flex-wrap:wrap;max-width:92%;font-size:11px}html[lang="en"] .hero-actions{flex-wrap:wrap}html[lang="en"] .hero-inner{width:85%}html[lang="en"] .study-grid h3{line-height:1.4}html[lang="en"] .section-top>p{max-width:390px}html[lang="en"] .contact a{overflow-wrap:anywhere}html[lang="en"] .focus-grid h3{line-height:1.4}html[lang="en"] .photo-caption h2{font-size:30px}html[lang="en"] footer strong{font-family:Georgia,serif}
@media(max-width:1150px){html[lang="en"] header .menu{display:block;background:transparent;border:1px solid var(--line);padding:8px 10px;color:var(--ink);font-size:14px}html[lang="en"] header nav{display:none;position:absolute;top:100%;left:0;right:0;background:white;padding:18px 6%;box-shadow:0 10px 20px #102f4710}html[lang="en"] header nav.open{display:flex;flex-direction:column;align-items:stretch;gap:0}html[lang="en"] header nav a{padding:10px 0}html[lang="en"] .nav-contact{display:block;border:0}}
@media(max-width:650px){html{scroll-padding-top:125px}header{display:grid;grid-template-columns:minmax(0,1fr) auto auto;gap:10px;padding:15px 6%}.brand .wordmark{font-size:21px}.brand .wordmark span{display:block;font-size:15px}.brand small{font-size:8px;letter-spacing:.45px;white-space:normal}.language-switch{grid-column:2;order:2;font-size:13px;padding:6px 8px}.menu{grid-column:3;order:3}header nav{grid-column:1/-1}.brand{margin:0;overflow-wrap:normal}html[lang="en"] .wordmark{font-size:19px}html[lang="en"] .wordmark span{font-size:14px}html[lang="en"] .brand small{font-size:8px;letter-spacing:.3px}html[lang="en"] .hero-inner{width:100%}html[lang="en"] .hero h1{font-size:36px}html[lang="en"] .hero .eyebrow{max-width:100%;font-size:11px}html[lang="en"] .hero-actions{gap:20px}html[lang="en"] .hero-side{right:-40px;font-size:56px}html[lang="en"] .focus-grid h3{display:block;margin:12px 0}html[lang="en"] .photo-caption h2{font-size:27px}html[lang="en"] .hero-bottom{max-width:100%}html[lang="en"] .contact .button{font-size:13px;gap:18px;max-width:100%}html[lang="en"] .study-grid article{padding:24px}html[lang="en"] h2{font-size:32px}}
@media(min-width:651px) and (max-width:1050px){header .menu{display:block;background:transparent;border:1px solid var(--line);padding:8px 10px;color:var(--ink);font-size:14px}header nav{display:none;position:absolute;top:100%;left:0;right:0;background:white;padding:18px 6%;box-shadow:0 10px 20px #102f4710}header nav.open{display:flex;flex-direction:column;align-items:stretch;gap:0}header nav a{padding:10px 0}header .nav-contact{display:block;border:0}}