:root{--bg:#F4F7FA;--surface:#fff;--mist:#EAF1F6;--pale:#E9F8F8;--nav:#102E46;--nav2:#163C57;--teal:#13B8C5;--blue:#237BD3;--heading:#18364B;--body:#344C60;--muted:#64798A;--line:#DCE6ED;--footer:#0B2539;--footertext:#DCECF5}*{box-sizing:border-box}html{scroll-behavior:smooth;scroll-padding-top:28px}body{margin:0;background:var(--bg);font:16px/1.8 Arial,"PingFang SC","Microsoft YaHei",sans-serif;color:var(--body)}body.drawer-open{overflow:hidden}a{color:#1467a5;text-underline-offset:3px}a:hover{color:#07517f}a:focus-visible,button:focus-visible,summary:focus-visible{outline:3px solid var(--teal);outline-offset:3px}img{max-width:100%;height:auto}h1,h2,h3,p,ul,ol,figure{margin-top:0}h1,h2,h3{color:var(--heading);line-height:1.4}h1{font-size:35px;letter-spacing:-.025em;line-height:1.32}h2{font-size:26px;margin-bottom:20px}h3{font-size:20px;margin-bottom:12px}p{margin-bottom:17px}small,.eyebrow{font-size:13px}.eyebrow{display:block;letter-spacing:.12em;color:#067885;font-weight:700;margin-bottom:14px;text-transform:uppercase}.lead{font-size:18px;color:#425e70}.muted{color:var(--muted)}.container{max-width:1200px;margin-inline:auto;padding-inline:28px}.section{margin-block:62px}.section-tight{margin-block:45px}.section-heading{max-width:780px;margin-bottom:26px}.section-heading p{color:var(--muted)}.skip-link{position:absolute;z-index:2000;left:15px;top:-60px;background:#fff;padding:10px}.skip-link:focus{top:6px}.site-header{background:#fff;position:relative;z-index:15}.brand-bar{min-height:72px;display:flex;align-items:center;gap:24px}.brand{display:flex;align-items:center;gap:20px;color:var(--heading);text-decoration:none;min-width:0}.brand-label{font-size:13px;font-weight:700;color:#60788a;white-space:nowrap}.brand-label i{font-style:normal;margin-inline:5px;color:#a4b3bd}.brand .media-frame{padding:0;border:0;background:transparent}.media-frame--logo img{max-height:38px;width:auto}.brand .media-placeholder{min-width:110px;min-height:30px;padding:4px 8px;font-size:11px}.register-link{margin-left:auto;white-space:nowrap;text-decoration:none;border:1px solid var(--nav);background:var(--nav);color:#fff;border-radius:9px;min-height:40px;display:inline-flex;align-items:center;justify-content:center;padding:0 17px;font-size:14px;font-weight:700}.register-link:hover{background:#23506e;color:#fff}.desktop-nav{background:var(--nav)}.nav-inner{display:flex;justify-content:space-between;gap:8px}.desktop-nav a{color:#f1f6f9;text-decoration:none;text-align:center;padding:12px 10px 11px;font-weight:600;font-size:15px;min-height:50px;position:relative;white-space:nowrap}.desktop-nav a:hover{color:#fff;background:#23465d}.desktop-nav a[aria-current="page"]{color:#fff;font-weight:800}.desktop-nav a[aria-current="page"]:after{content:"";position:absolute;bottom:5px;left:25%;right:25%;height:3px;background:var(--teal);border-radius:3px}.menu-toggle,.mobile-drawer,.drawer-shade,.mobile-shortcuts,.nojs-nav{display:none}.page-intro{padding:47px 0 29px;background:#eaf1f6;border-bottom:1px solid var(--line)}.page-intro .container>p{max-width:850px}.page-intro h1{max-width:920px;margin-bottom:15px}.crumb{display:flex;align-items:center;gap:11px;color:var(--muted);font-size:13px;margin-bottom:20px}.crumb a{color:#426279}.hero{display:grid;grid-template-columns:minmax(0,1.08fr) minmax(0,1fr);gap:44px;align-items:center;padding-top:48px}.hero h1{font-size:42px;max-width:600px}.hero p{max-width:610px}.actions{display:flex;gap:12px;flex-wrap:wrap;margin-top:24px}.btn{display:inline-flex;align-items:center;justify-content:center;min-height:42px;padding:9px 17px;text-decoration:none;border-radius:9px;font-weight:700;font-size:15px;background:var(--nav);color:white}.btn:hover{background:#23516e;color:#fff}.btn-outline{background:#fff;color:var(--nav);border:1px solid #bccfd9}.btn-outline:hover{background:#eaf1f6;color:var(--nav)}.media-frame{display:flex;align-items:center;justify-content:center;min-width:0;width:100%;padding:8px;background:var(--mist);border:1px solid var(--line);border-radius:14px;overflow:hidden}.media-frame img{display:block;width:auto;height:auto;max-width:100%;max-height:var(--media-limit,220px);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}.media-placeholder{min-height:110px;color:#6a8594;font-size:13px;text-align:center}.media-placeholder.media-frame--hero{min-height:180px}.media-placeholder.media-frame--feature{min-height:125px}.topic-list{display:grid;grid-template-columns:1fr 1fr;column-gap:52px}.topic-list article{display:grid;grid-template-columns:38px 1fr;gap:14px;padding:21px 0;border-top:1px solid #cbdce7;min-width:0}.topic-list .num{font-size:13px;font-weight:800;color:#008895}.topic-list h3{margin-bottom:8px}.topic-list h3 a{text-decoration:none;color:var(--heading)}.topic-list p{font-size:15px;margin:0}.editorial-split{display:grid;grid-template-columns:minmax(0,2fr) minmax(0,1fr);gap:18px}.primary-story{background:#fff;border-top:4px solid var(--teal);padding:30px}.primary-story h3{font-size:25px}.side-stories{display:grid;gap:18px}.side-stories article{padding:24px;background:#eaf1f6;border-top:1px solid #b6ceda}.side-stories p:last-child{margin:0}.image-copy{display:grid;grid-template-columns:minmax(0, .95fr) minmax(0,1.05fr);gap:36px;align-items:center}.image-copy.reverse{grid-template-columns:minmax(0,1.12fr) minmax(0,.88fr)}.image-copy.reverse>:first-child{order:2}.image-copy.reverse>:last-child{order:1}.light-band{background:var(--pale);padding:33px;border-left:4px solid var(--teal)}.dark-band{background:var(--nav2);color:#eaf6fb;padding:32px;border-radius:12px}.dark-band h2,.dark-band h3{color:#fff}.three-notes{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:17px}.three-notes article{background:#fff;padding:24px;border:1px solid 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258px;gap:46px;align-items:start}.article-layout article{min-width:0}.article-layout aside{background:#fff;border:1px solid var(--line);padding:23px;position:sticky;top:20px;font-size:14px}.article-layout aside h3{font-size:18px}.article-layout aside ul{padding-left:20px}.prose{max-width:780px}.prose h2{margin-top:39px}.prose h2:first-child{margin-top:0}.prose h3{margin-top:24px}.prose ul,.prose ol{padding-left:25px}.prose li{margin-bottom:9px}.table-scroll{overflow-x:auto;max-width:100%;border:1px solid var(--line);border-radius:12px;background:#fff}.data-table{border-collapse:collapse;width:100%;min-width:610px;font-size:15px;text-align:left}.data-table caption{text-align:left;font-weight:700;padding:14px 18px;color:var(--heading)}.data-table th,.data-table td{padding:14px 16px;border-bottom:1px solid var(--line);vertical-align:top}.data-table th{background:#eaf1f6;color:var(--heading);font-weight:700}.data-table tr:last-child 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1.3fr;gap:32px;align-items:center}.text-stack{display:grid;gap:23px}.text-stack>article{border-bottom:1px solid var(--line);padding-bottom:15px}.exhibit-grid{display:grid;grid-template-columns:1fr 1fr;gap:28px;align-items:start}.exhibit-grid figure{margin:0}.exhibit-grid figure:nth-child(2){margin-top:42px}.exhibit-grid figcaption{font-size:14px;color:var(--muted);margin-top:9px}.faq details{background:#fff;border:1px solid var(--line);margin-bottom:10px;border-radius:9px;padding:0 18px}.faq summary{cursor:pointer;font-weight:700;color:var(--heading);padding:15px 2px}.faq details p{padding:0 2px 12px;margin:0;font-size:15px}.reading-links{border-top:1px solid #bed1dc;margin-block:62px;padding-top:25px}.reading-links__grid{display:grid;grid-template-columns:repeat(3,1fr);gap:18px}.reading-links__grid>div{border-left:3px solid var(--teal);padding:5px 0 8px 16px}.reading-links__grid a{font-weight:700}.reading-links__grid p{font-size:14px;color:var(--muted);margin:6px 0}.service-layout{display:grid;grid-template-columns:240px minmax(0,1fr);gap:40px}.service-nav{align-self:start;position:sticky;top:22px;padding:18px;background:#fff;border:1px solid var(--line)}.service-nav a{display:block;padding:7px 4px}.service-content{min-width:0}.site-footer{margin-top:65px;background:var(--footer);color:var(--footertext);padding-top:44px}.footer-grid{display:grid;grid-template-columns:2fr 1fr;gap:60px}.footer-grid p{max-width:680px;color:#c5dce6;font-size:14px}.footer-title{display:block;color:#fff;font-size:21px;margin-bottom:10px}.footer-title small{display:block;letter-spacing:.12em;color:#8ddde1}.footer-grid nav{display:grid;align-content:start;gap:5px}.footer-grid nav b{color:#fff}.footer-grid nav a,.footer-bottom a{color:#d5edf5;text-decoration:none;font-size:14px}.footer-grid nav a:hover,.footer-bottom a:hover{text-decoration:underline}.footer-bottom{border-top:1px solid #28495c;padding-top:15px;padding-bottom:18px;margin-top:34px;display:flex;justify-content:space-between;gap:20px;font-size:13px;color:#b5cedb}
@media(max-width:1199px){.container{padding-inline:22px}.brand-bar{gap:12px}.brand-label{font-size:12px}.nav-inner{gap:1px}.desktop-nav a{font-size:14px;padding-inline:6px}}
@media(max-width:920px){.site-header{height:63px}.brand-bar{height:63px;min-height:63px;display:grid;grid-template-columns:40px minmax(0,1fr) auto;gap:8px}.brand{justify-self:center}.brand-label{display:none}.brand .media-frame--logo img{max-height:30px}.brand .media-placeholder{min-width:100px;min-height:29px}.register-link{height:39px;min-height:39px;font-size:13px;padding:0 11px}.desktop-nav{display:none}.menu-toggle{display:flex;width:40px;height:40px;flex-direction:column;align-items:center;justify-content:center;gap:5px;border:1px solid #cad7e0;border-radius:9px;background:#fff;cursor:pointer}.menu-toggle span{width:19px;height:2px;background:var(--nav)}.mobile-drawer{display:block;position:fixed;top:0;bottom:0;left:0;width:min(86vw,340px);overflow-y:auto;background:#fff;z-index:35;transform:translateX(-105%);transition:transform .23s ease;box-shadow:5px 0 22px #112e4629}.drawer-shade{display:block;position:fixed;inset:0;background:rgb(10 32 50 / .55);z-index:30;opacity:0;visibility:hidden;pointer-events:none;transition:opacity .2s,visibility .2s}.drawer-open .mobile-drawer{transform:translateX(0)}.drawer-open .drawer-shade{opacity:1;visibility:visible;pointer-events:auto}.drawer-heading{display:flex;justify-content:space-between;align-items:center;padding:14px 20px;border-bottom:1px solid var(--line)}.drawer-close{width:40px;height:40px;border:1px solid var(--line);background:#fff;border-radius:9px;font-size:26px;color:var(--heading);cursor:pointer}.drawer-group{padding:12px 20px 18px;border-bottom:1px solid var(--line)}.drawer-group b{display:block;color:#718596;font-size:12px;padding:5px 8px}.drawer-group a{display:block;padding:9px 12px;border-radius:8px;color:var(--heading);text-decoration:none;font-weight:600}.drawer-group a[aria-current="page"]{background:#e9f8f8;border-left:3px solid #13b8c5}.mobile-shortcuts{display:flex;flex-wrap:wrap;justify-content:center;gap:12px;padding-top:22px}.mobile-shortcuts a{font-size:13px}.hero{gap:22px}.hero h1{font-size:36px}.article-layout{grid-template-columns:minmax(0,1fr) 210px;gap:24px}}
@media(max-width:760px){.hero,.image-copy,.image-copy.reverse,.feature-strip,.story-columns,.editorial-split,.article-layout,.service-layout{grid-template-columns:1fr}.image-copy.reverse>:first-child,.image-copy.reverse>:last-child{order:initial}.article-layout aside,.service-nav{position:static}.service-content{order:1}.service-nav{order:2}.hero{padding-top:32px}.topic-list{column-gap:24px}.reading-links__grid{grid-template-columns:1fr 1fr}.footer-grid{gap:28px}.section{margin-block:45px}.section-tight{margin-block:35px}.exhibit-grid{gap:16px}}
@media(max-width:640px){body{font-size:15px;line-height:1.78}.container{padding-inline:16px}h1{font-size:27px}h2{font-size:22px}h3{font-size:18px}.hero h1{font-size:30px}.lead{font-size:16px}.page-intro{padding:25px 0 17px}.hero{gap:23px}.section{margin-block:35px}.topic-list,.knowledge-grid,.three-notes,.exhibit-grid,.reading-links__grid,.footer-grid{grid-template-columns:1fr}.topic-list article{padding:14px 0}.exhibit-grid figure:nth-child(2){margin-top:0}.route-steps{grid-template-columns:1fr 1fr}.three-notes article:nth-child(2),.three-notes article:nth-child(3){transform:none}.primary-story,.side-stories article,.light-band,.dark-band{padding:21px}.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}.media-placeholder.media-frame--hero{min-height:110px}.footer-bottom{flex-direction:column;gap:5px}.site-footer{margin-top:40px}.story-columns{gap:15px}.actions{gap:9px}.btn{font-size:14px}.subnav a{padding:6px 12px}}
@media(max-width:390px){.brand-bar{gap:4px}.register-link{padding-inline:8px;font-size:12px}.route-steps{grid-template-columns:1fr}.brand .media-placeholder{min-width:80px;font-size:9px}.footer-grid{gap:16px}}
@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}*,*:before,*:after{transition:none!important;animation:none!important}}
@media(max-width:920px){noscript .nojs-nav{display:flex;gap:8px;flex-wrap:wrap;background:#eaf1f6;padding:10px 16px;position:relative;z-index:3}noscript .nojs-nav a{font-size:13px;padding:3px 6px}}