:root{--bg:#F4F7FA;--paper:#fff;--soft:#EAF1F6;--mint:#E9F8F8;--nav:#102E46;--deep:#163C57;--teal:#13B8C5;--blue:#237BD3;--heading:#18364B;--text:#344C60;--muted:#64798A;--line:#DCE6ED;--footer:#0B2539;--wrap:1200px}
*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;background:var(--bg);color:var(--text);font:16px/1.8 Arial,"PingFang SC","Microsoft YaHei",sans-serif;overflow-wrap:break-word}a{color:#1263a4;text-underline-offset:4px}a:hover{color:#07517e}img{max-width:100%;height:auto}h1,h2,h3{color:var(--heading);line-height:1.4;margin:0 0 .65em}h1{font-size:36px}h2{font-size:27px}h3{font-size:20px}p{margin:.6em 0 1.05em}ul,ol{padding-left:1.5em}li{margin:.35em 0}section{scroll-margin-top:20px}.container{width:min(calc(100% - 56px),var(--wrap));margin-inline:auto}.read-col{max-width:780px}.section{margin-block:62px}.section:last-child{margin-bottom:70px}.eyebrow{font-size:13px;font-weight:700;color:#087c88;text-transform:uppercase;letter-spacing:.08em}.lead{font-size:18px;line-height:1.8;max-width:820px}.muted{color:var(--muted)}.surface{background:var(--paper);border:1px solid var(--line);border-radius:14px;padding:24px}.band{background:var(--soft);padding:42px 0;margin:58px 0}.band-dark{background:var(--deep);color:#e9f6ff;padding:40px;border-radius:15px}.band-dark h2,.band-dark h3{color:white}.band-dark a{color:#8dedf2}.alt-band{background:var(--mint);padding:35px;border-radius:14px}.section-head{display:flex;justify-content:space-between;align-items:end;gap:20px;border-bottom:1px solid var(--line);padding-bottom:14px;margin-bottom:23px}.section-head p{max-width:550px;margin:0}.btn,.register-link{background:var(--nav);color:#fff;text-decoration:none;display:inline-flex;align-items:center;justify-content:center;border-radius:8px;font-weight:700;padding:10px 19px;min-height:42px}.btn:hover,.register-link:hover{background:#196c9c;color:#fff}.btn-outline{border:1px solid #96c6d6;background:white;color:var(--heading)}.btn-outline:hover{background:var(--mint);color:var(--heading)}.button-line{display:flex;flex-wrap:wrap;gap:12px;margin-top:22px}.site-header{position:relative;z-index:5}.brand-bar{background:#fff;border-bottom:1px solid 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a[aria-current]{font-weight:700;border-bottom-color:var(--teal);color:#fff}.menu-toggle,.mobile-menu,.menu-overlay,.mobile-shortcuts{display:none}.nojs-nav{display:none}.skip-link{position:absolute;top:-100px;left:10px;background:white;padding:8px;z-index:99}.skip-link:focus{top:6px}.page-heading{padding:43px 0 12px}.breadcrumb{font-size:13px;color:var(--muted);margin-bottom:16px}.breadcrumb a{color:#245e85}.page-heading p{max-width:820px}.hero{display:grid;grid-template-columns:minmax(0,52fr) minmax(0,48fr);align-items:center;gap:32px;padding-top:55px}.hero h1{font-size:42px}.hero p{font-size:17px}.media-frame{display:flex;align-items:center;justify-content:center;width:100%;min-width:0;margin:0;padding:8px;background:var(--soft);border:1px solid var(--line);border-radius:14px}.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--banner{--media-limit:210px}.media-frame--mobile{--media-limit:350px;max-width:320px;margin-inline:auto}.media-frame--empty{min-height:125px;color:#5d7d92;text-align:center;font-size:13px;border-style:dashed}.media-frame--hero.media-frame--empty{min-height:205px}.media-frame--mobile.media-frame--empty{min-height:220px}.media-frame--empty span{padding:20px}.topic-directory{display:grid;grid-template-columns:1fr 1fr;gap:0 38px}.topic-item{border-top:1px solid var(--line);padding:17px 0}.topic-item h3{font-size:19px;margin-bottom:4px}.topic-item p{font-size:15px;margin:0}.focus-grid{display:grid;grid-template-columns:minmax(0,2fr) minmax(0,1fr);gap:28px}.focus-grid>*{min-width:0}.focus-main{background:#fff;border:1px solid var(--line);padding:28px;border-top:4px solid var(--teal)}.focus-side{display:grid;gap:17px}.focus-side article{padding:20px;background:var(--soft);border-radius:10px}.focus-side h3{margin:0 0 8px}.split{display:grid;grid-template-columns:1fr 1fr;gap:35px;align-items:center}.split>*{min-width:0}.split-uneven{grid-template-columns:minmax(0,1.25fr) minmax(0,.75fr)}.split--text-first>*:first-child{order:0}.note{border-left:4px solid var(--teal);padding:12px 17px;background:var(--mint);margin:25px 0}.mini-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:17px}.mini-grid>article{min-width:0;border-top:3px solid var(--teal);background:#fff;padding:18px 20px}.route{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:20px;counter-reset:step}.route article{position:relative;border-top:1px solid #91cbd4;padding-top:15px}.route article::before{counter-increment:step;content:'0' counter(step);display:block;color:#087d88;font-size:24px;font-weight:700}.route h3{font-size:18px}.section-links{margin:55px 0;padding:25px;border:1px solid var(--line);background:#fff;border-radius:12px}.link-columns{display:flex;flex-wrap:wrap;gap:10px 22px}.section-links h2{font-size:22px}.intro-layout{display:grid;grid-template-columns:minmax(0,1fr) 260px;gap:38px}.intro-layout>*{min-width:0}.fact-aside{padding:20px;background:var(--soft);border-radius:12px;align-self:start}.fact-aside h2{font-size:19px}.fact-aside ul{font-size:14px;padding-left:20px}.anchor-nav{display:flex;flex-wrap:wrap;gap:8px 15px;padding:15px 0;border-block:1px solid var(--line);margin:25px 0}.anchor-nav a{padding:5px 12px;background:#fff;border:1px solid var(--line);border-radius:6px;text-decoration:none}.article-section{margin:42px 0}.article-section h2{padding-bottom:10px;border-bottom:1px solid var(--line)}.article-section p{max-width:800px}.table-scroll{max-width:100%;overflow-x:auto;border:1px solid var(--line);border-radius:11px;background:#fff;margin:22px 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var(--teal);padding-bottom:10px}.gallery{display:grid;grid-template-columns:1fr 1fr;gap:30px}.gallery article{min-width:0}.gallery article:nth-child(even){margin-top:50px}.gallery article .media-frame{margin-bottom:15px}.reading-index{position:relative}.reading-index nav{display:flex;gap:8px;flex-wrap:wrap}.faq-list{max-width:900px}.faq-list details{background:#fff;border:1px solid var(--line);padding:14px 20px;margin:9px 0;border-radius:9px}.faq-list summary{font-weight:700;cursor:pointer;color:var(--heading)}.faq-list details p{margin-bottom:4px}.service-layout{display:grid;grid-template-columns:230px minmax(0,1fr);gap:35px}.service-side{align-self:start;background:var(--soft);padding:22px;border-radius:12px}.service-side a{display:block;margin:9px 0}.service-article{min-width:0}.service-article section{margin:0 0 40px}.site-footer{background:var(--footer);color:#DCECF5;padding:45px 0}.site-footer p{font-size:14px;max-width:680px}.site-footer 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@media(max-width:920px){.container{width:calc(100% - 44px)}.desktop-nav{display:none}.brand-layout{min-height:62px;justify-content:space-between;gap:8px}.brand-logo{position:absolute;left:50%;transform:translateX(-50%);max-width:calc(100% - 240px)}.brand-logo img{max-height:30px}.brand-logo strong{font-size:19px}.brand-logo small{font-size:8px}.brand-tagline{display:none}.register-link{font-size:12px;min-height:40px;padding:8px 12px}.menu-toggle{display:flex;flex-direction:column;align-items:center;justify-content:center;gap:5px;width:40px;height:40px;background:none;border:1px solid var(--line);border-radius:8px;cursor:pointer;padding:0}.menu-toggle span{width:18px;height:2px;background:var(--heading)}.menu-overlay{display:block;position:fixed;inset:0;background:rgba(9,30,45,.48);opacity:0;visibility:hidden;pointer-events:none;transition:opacity .2s;z-index:19}.mobile-menu{display:block;position:fixed;top:0;bottom:0;left:0;width:min(86vw,340px);background:#fff;box-shadow:8px 0 24px #061e2b2e;z-index:20;overflow-y:auto;transform:translateX(-103%);visibility:hidden;pointer-events:none;transition:transform .22s,visibility .22s;padding:20px}.menu-open{overflow:hidden}.menu-open .menu-overlay{opacity:1;visibility:visible;pointer-events:auto}.menu-open .mobile-menu{transform:translateX(0);visibility:visible;pointer-events:auto}.drawer-heading{display:flex;align-items:center;justify-content:space-between;color:var(--heading);font-weight:700;font-size:20px}.menu-close{width:42px;height:42px;background:var(--soft);border:0;border-radius:8px;font-size:26px;color:var(--heading);cursor:pointer}.drawer-group{border-top:1px solid var(--line);padding-top:14px;margin-top:20px}.drawer-group strong{display:block;color:#658092;font-size:13px}.drawer-group a{display:block;color:var(--heading);padding:9px 12px;text-decoration:none;border-radius:7px}.drawer-group a[aria-current]{background:var(--mint);border-left:3px solid var(--teal);font-weight:bold}.mobile-shortcuts{display:flex;flex-wrap:wrap;gap:10px 20px;margin-block:30px}.mobile-shortcuts a{font-size:14px}.intro-layout{grid-template-columns:1fr 230px}}
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@media(max-width:640px){body{font-size:15px}.container{width:calc(100% - 32px)}h1{font-size:27px}h2{font-size:22px}h3{font-size:18px}.section{margin-block:37px}.section:last-child{margin-bottom:44px}.page-heading{padding-top:30px}.hero{grid-template-columns:1fr;padding-top:32px}.hero h1{font-size:30px}.hero p,.lead{font-size:16px}.hero .hero-copy{order:0}.hero .media-frame{order:1}.topic-directory,.gallery,.simple-list,.matrix,.mini-grid{grid-template-columns:1fr}.focus-main{padding:20px}.split{gap:20px}.section-head{display:block}.section-head p{margin-top:5px}.band{padding:27px 0;margin:35px 0}.band-dark{padding:24px}.alt-band{padding:20px}.surface{padding:18px}.route{gap:12px}.route article{padding-right:5px}.brand-logo{max-width:calc(100% - 185px)}.brand-logo img{max-height:28px}.brand-logo strong{font-size:16px}.brand-logo small{font-size:7px}.register-link{padding:6px 9px;font-size:12px}.media-frame--hero{--media-limit:205px}.media-frame--feature{--media-limit:185px}.media-frame--card{--media-limit:145px}.media-frame--banner{--media-limit:135px}.media-frame--mobile{--media-limit:285px;max-width:250px}.footer-layout nav{min-width:0;grid-template-columns:1fr 1fr}.article-section{margin:30px 0}.page-heading p{line-height:1.8}}
@media(max-width:370px){.brand-logo{max-width:calc(100% - 170px)}.brand-logo strong{font-size:14px}.register-link{font-size:11px;padding:5px 7px}.route{grid-template-columns:1fr}}
@media(min-width:921px){.nojs-nav{display:none!important}}
@media(max-width:920px){html:not(.js-ready) .nojs-nav{display:flex;flex-wrap:wrap;gap:8px 14px;padding-block:12px;font-size:13px}html:not(.js-ready) .menu-toggle{display:none}}
@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}*,*::before,*::after{transition-duration:.01ms!important;animation-duration:.01ms!important}}

@media(max-width:640px){.service-layout .split{grid-template-columns:1fr}}