:root{--bg:#F4F7FA;--white:#fff;--wash:#EAF1F6;--mint:#E9F8F8;--navy:#102E46;--dark:#163C57;--teal:#13B8C5;--blue:#237BD3;--heading:#18364B;--body:#344C60;--muted:#64798A;--line:#DCE6ED;--footer:#0B2539}*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;background:var(--bg);color:var(--body);font:16px/1.8 Arial,'PingFang SC','Microsoft YaHei',sans-serif;overflow-wrap:break-word}a{color:#14699F;text-underline-offset:3px}a:hover{color:#08527d}button{font:inherit}a:focus-visible,button:focus-visible,summary:focus-visible{outline:3px solid var(--blue);outline-offset:3px}img{max-width:100%;height:auto}.container{max-width:1200px;margin-inline:auto;padding-inline:28px;min-width:0}h1,h2,h3{color:var(--heading);line-height:1.38;margin:0 0 .7em}h1{font-size:36px}h2{font-size:26px}h3{font-size:20px}p{margin:0 0 1.15em}section{margin-block:56px}section:first-child{margin-top:30px}.eyebrow{font-size:13px;letter-spacing:.13em;font-weight:700;color:#138796;text-transform:uppercase}.lead{font-size:18px;color:#4a6375;max-width:850px}.muted{color:var(--muted)}.skip-link{position:absolute;left:10px;top:-120px;z-index:200;background:white;padding:10px}.skip-link:focus{top:8px}.site-header{background:white;position:relative;z-index:10}.brandbar{height:72px;display:flex;align-items:center;justify-content:space-between;gap:16px}.brand{display:flex;align-items:center;gap:12px;min-width:0;text-decoration:none}.brand .media-frame{padding:0;background:transparent;max-width:150px}.brand-name{font-size:14px;color:var(--heading);font-weight:800;letter-spacing:.035em;white-space:nowrap}.brand-name small{display:block;font-size:11px;font-weight:400;color:var(--muted);letter-spacing:0}.entry-link{display:inline-flex;align-items:center;justify-content:center;min-height:40px;padding:7px 16px;color:#fff;background:var(--navy);border-radius:10px;text-decoration:none;font-size:14px;font-weight:700;white-space:nowrap}.entry-link:hover{background:var(--dark);color:white}.desktop-nav{background:var(--navy)}.nav-grid{display:grid;grid-template-columns:repeat(7,minmax(0,1fr));height:51px}.nav-grid a{display:flex;align-items:center;justify-content:center;position:relative;text-align:center;padding:4px 2px;color:#dbe9f0;text-decoration:none;font-size:14px;white-space:nowrap}.nav-grid a:hover,.nav-grid .active{color:#fff;font-weight:700}.nav-grid .active:after{content:'';height:3px;width:26px;background:var(--teal);position:absolute;bottom:0;left:50%;transform:translateX(-50%)}.mobile-bar,.mobile-drawer,.drawer-backdrop,.mobile-quick,.no-js-nav{display:none}.content-root{padding-bottom:58px}.breadcrumb{display:flex;align-items:center;gap:10px;font-size:13px;color:var(--muted);margin:26px 0 30px}.breadcrumb a{color:var(--muted)}.page-intro{padding:31px 35px;background:var(--wash);border-left:4px solid var(--teal);border-radius:0 16px 16px 0}.page-intro .lead{margin:0}.section-nav{display:flex;flex-wrap:wrap;gap:8px;margin:24px 0 36px}.section-nav a{border:1px solid var(--line);padding:8px 16px;background:#fff;border-radius:100px;text-decoration:none;font-size:14px}.hero{display:grid;grid-template-columns:1.04fr .96fr;align-items:center;gap:32px;margin-top:36px}.hero h1{font-size:42px}.hero p{max-width:590px}.button-row{display:flex;flex-wrap:wrap;gap:12px;margin-top:24px}.button{display:inline-flex;padding:12px 20px;border-radius:10px;text-decoration:none;font-weight:700;min-height:44px;align-items:center;background:var(--navy);color:white}.button.secondary{background:var(--mint);color:#12546a}.button:hover{color:white;background:#28526d}.media-frame{margin:0;display:flex;align-items:center;justify-content:center;width:100%;min-width:0;padding:8px;border-radius:14px;background:var(--wash);--media-limit:220px}.media-frame img{display:block;width:auto;height:auto;max-width:100%;max-height:var(--media-limit);object-fit:contain;object-position:center}.media-frame--hero{--media-limit:310px}.media-frame--feature{--media-limit:250px}.media-frame--card{--media-limit:185px}.media-frame--wide{--media-limit:210px}.media-frame--mobile{--media-limit:350px;max-width:320px;margin-inline:auto}.media-frame--logo{--media-limit:38px;width:auto;flex:none}.media-frame--logo img{max-width:155px}.media-placeholder{display:grid;place-items:center;min-height:90px;width:100%;border:1px dashed #c9dbe5;border-radius:8px;color:#64798a;font-size:13px;text-align:center;padding:12px}.hero .media-placeholder{min-height:190px}.topic-index{display:grid;grid-template-columns:1fr 1fr;column-gap:45px}.topic-index article{border-top:1px solid var(--line);padding:19px 0 12px;min-width:0}.topic-index h3{margin-bottom:6px}.topic-index p{font-size:15px;margin-bottom:7px}.asym{display:grid;grid-template-columns:2fr 1fr;gap:30px}.feature-story,.note-panel{background:white;border:1px solid var(--line);padding:26px;border-radius:14px}.mini-stack{display:grid;gap:18px}.mini-stack article{border-left:3px solid var(--teal);padding:8px 0 6px 17px}.split{display:grid;grid-template-columns:1fr 1.13fr;gap:34px;align-items:center}.split.reverse{grid-template-columns:1.13fr 1fr}.split.reverse .media-frame{order:2}.editorial-strip{border-top:2px solid var(--navy);border-bottom:1px solid var(--line);padding:27px 0;display:grid;grid-template-columns:1fr 1fr 1fr;gap:26px}.lesson-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:18px;align-items:start}.lesson-grid article{padding:24px;background:white;border-top:3px solid var(--teal)}.lesson-grid article:nth-child(2){margin-top:23px}.lesson-grid article:nth-child(3){margin-top:46px}.timeline{counter-reset:step;display:grid;grid-template-columns:repeat(4,1fr);gap:16px}.timeline article{counter-increment:step;padding:18px 18px 12px;border-top:3px solid var(--teal);background:white}.timeline article:before{content:'0' counter(step);font-size:13px;font-weight:bold;color:#087b8c}.reading-col{max-width:790px}.reading-col p{line-height:1.82}.wide-section{margin-block:56px}.two-columns{display:grid;grid-template-columns:minmax(0,1.7fr) minmax(230px,.7fr);gap:34px;align-items:start}.aside-note{padding:22px;background:var(--mint);border-radius:12px;border-left:3px solid var(--teal)}.inline-figure{max-width:680px;margin:24px auto}.data-wrap{overflow-x:auto;max-width:100%;border:1px solid var(--line);border-radius:12px;background:white}table{width:100%;border-collapse:collapse;min-width:550px;font-size:15px}caption{text-align:left;font-weight:700;padding:16px 18px;color:var(--heading)}th,td{text-align:left;vertical-align:top;padding:14px 16px;border-bottom:1px solid var(--line)}th{background:var(--wash);color:var(--heading)}tr:last-child td{border-bottom:0}.process{display:grid;grid-template-columns:repeat(3,1fr);gap:16px}.process>div{background:white;border:1px solid var(--line);padding:20px;border-top:4px solid var(--teal);border-radius:8px}.process strong{display:block;margin-bottom:7px;color:var(--heading)}.vertical-steps{counter-reset:st;display:grid;gap:16px}.vertical-steps article{counter-increment:st;position:relative;padding:20px 23px 18px 70px;background:white;border-left:3px solid var(--teal)}.vertical-steps article:before{content:counter(st);position:absolute;left:21px;top:20px;font-weight:800;color:#168b9a;font-size:22px}.vertical-steps h3{margin-bottom:5px}.exhibit{display:grid;grid-template-columns:1fr 1fr;gap:32px;align-items:start}.exhibit article:nth-child(2){margin-top:70px}.exhibit article{background:white;padding:20px;border:1px solid var(--line);border-radius:12px}.cross-links{display:flex;flex-wrap:wrap;gap:12px;margin-top:25px}.cross-links a{background:white;border:1px solid var(--line);border-radius:10px;text-decoration:none;padding:13px 16px;font-weight:700}.cross-links span{color:#118d98}.faq details{padding:17px 2px;border-bottom:1px solid var(--line)}.faq summary{cursor:pointer;font-weight:700;color:var(--heading)}.faq details p{padding:10px 20px 0 0;margin:0}.about-layout{display:grid;grid-template-columns:240px minmax(0,1fr);gap:38px}.service-side{background:var(--wash);padding:22px;align-self:start;border-radius:12px}.service-side a{display:block;padding:7px 0}.service-main section:first-child{margin-top:0}.statement{padding:24px;background:var(--dark);color:#e7f2f6;border-radius:12px}.statement h2{color:white}.site-footer{background:var(--footer);color:#DCECF5;padding:36px 0 48px}.footer-layout{display:grid;grid-template-columns:1.4fr 1fr;gap:50px}.footer-layout strong{font-size:20px;color:white}.footer-layout strong span{font-size:12px;letter-spacing:.08em}.footer-layout p{font-size:14px;max-width:600px}.footer-layout nav{display:grid;grid-template-columns:1fr 1fr;align-content:start;gap:12px}.footer-layout a{color:#DCECF5;text-decoration:none;font-size:14px}.footer-layout a:hover{text-decoration:underline}@media(max-width:1200px){.container{padding-inline:22px}}@media(max-width:920px){.desktop-nav,.brandbar{display:none}.mobile-bar{height:63px;padding:0 18px;display:grid;grid-template-columns:44px minmax(0,1fr) auto;align-items:center;gap:8px}.mobile-logo{justify-self:center;min-width:0}.mobile-logo .media-frame{padding:0;background:none}.mobile-logo img{max-width:min(150px,36vw);max-height:30px}.mobile-bar .entry-link{padding-inline:12px;font-size:13px;min-height:39px}.menu-toggle{width:40px;height:40px;border:1px solid var(--line);background:white;border-radius:9px;display:flex;flex-direction:column;justify-content:center;align-items:center;gap:4px}.menu-toggle span{height:2px;width:19px;background:var(--navy)}.drawer-backdrop{display:block;position:fixed;inset:0;background:rgba(8,28,44,.58);opacity:0;visibility:hidden;pointer-events:none;transition:opacity .2s;z-index:20}.drawer-backdrop.visible{opacity:1;visibility:visible;pointer-events:auto}.drawer-backdrop[hidden]{display:none}.mobile-drawer{display:block;position:fixed;left:0;top:0;bottom:0;transform:translateX(-105%);transition:transform .22s;background:white;width:min(86vw,340px);overflow-y:auto;z-index:21;padding:20px 22px;box-shadow:8px 0 20px #152e4430;visibility:hidden}.mobile-drawer.open{transform:translateX(0);visibility:visible}.drawer-head{display:flex;justify-content:space-between;align-items:center;border-bottom:1px solid var(--line);padding-bottom:12px}.drawer-close{width:42px;height:42px;border:0;background:var(--wash);font-size:30px;border-radius:9px}.drawer-group{padding:12px 0;border-bottom:1px solid var(--line)}.drawer-group p{font-size:12px;color:var(--muted);font-weight:bold;margin:0}.drawer-group a{display:block;text-decoration:none;padding:9px 10px;color:var(--heading);border-radius:8px}.drawer-group a.active{background:var(--mint);font-weight:800;border-left:3px solid var(--teal)}.drawer-active{overflow:hidden}.no-js-nav{display:flex;flex-wrap:wrap;gap:5px;padding-block:6px;border-top:1px solid var(--line)}.no-js-nav a{font-size:12px;padding:3px 8px}.js .no-js-nav{display:none}.mobile-quick{display:flex;flex-wrap:wrap;justify-content:center;gap:15px;margin-bottom:25px}.mobile-quick a{font-size:14px}.section-nav{margin-bottom:25px}}@media(max-width:760px){.two-columns,.asym,.split,.split.reverse,.hero,.about-layout,.footer-layout{grid-template-columns:1fr}.split.reverse .media-frame{order:0}.hero{gap:20px}.topic-index,.exhibit{grid-template-columns:1fr}.exhibit article:nth-child(2){margin-top:0}.timeline,.process{grid-template-columns:1fr 1fr}.editorial-strip{grid-template-columns:1fr}.lesson-grid{grid-template-columns:1fr}.lesson-grid article:nth-child(n){margin-top:0}.service-side{order:2}.page-intro{padding:24px}.reading-col{max-width:100%}}@media(max-width:640px){body{font-size:15px}.container{padding-inline:16px}h1,.hero h1{font-size:29px}h2{font-size:22px}h3{font-size:18px}section,.wide-section{margin-block:36px}section:first-child{margin-top:24px}.lead{font-size:16px}.media-frame--hero{--media-limit:205px}.media-frame--feature{--media-limit:185px}.media-frame--card{--media-limit:145px}.media-frame--wide{--media-limit:135px}.media-frame--mobile{--media-limit:285px;max-width:250px}.button-row{gap:8px}.button{font-size:14px;padding:9px 14px}.feature-story,.note-panel{padding:18px}.timeline,.process{grid-template-columns:1fr}.hero .media-placeholder{min-height:120px}.footer-layout nav{grid-template-columns:1fr 1fr}}@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}*,*:before,*:after{transition:none!important;animation:none!important}}