:root{--bg:#F4F7FA;--white:#fff;--mist:#EAF1F6;--aqua:#E9F8F8;--navy:#102E46;--deep:#163C57;--brand:#13B8C5;--blue:#237BD3;--title:#18364B;--text:#344C60;--sub:#64798A;--line:#DCE6ED;--wrap:1200px}*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;background:var(--bg);color:var(--text);font:16px/1.82 Arial,'PingFang SC','Microsoft YaHei',sans-serif;overflow-x:hidden}img{max-width:100%}a{color:#1665a6;text-decoration-thickness:1px;text-underline-offset:4px}a:hover{color:#087b93}button{font:inherit;cursor:pointer}button:focus-visible,a:focus-visible,summary:focus-visible{outline:3px solid var(--brand);outline-offset:3px}h1,h2,h3,p{margin-top:0}h1,h2,h3{color:var(--title);line-height:1.38;letter-spacing:.01em}h1{font-size:36px}h2{font-size:27px}h3{font-size:20px}p{margin-bottom:17px}main{min-height:55vh}section{scroll-margin-top:28px}.container{width:min(calc(100% - 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p{font-size:17px}.eyebrow{text-transform:uppercase;letter-spacing:.12em;color:#087c92;font-size:12px;font-weight:800;display:block;margin-bottom:10px}.section-heading{max-width:770px;margin-bottom:25px}.section-heading h2{margin-bottom:8px}.section-heading p{color:var(--sub)}.section-space{margin-top:60px}.reading-column{max-width:790px}.article p,.reading-column p{line-height:1.85}.article h3{margin-top:26px}.light-panel{padding:26px;background:var(--white);border:1px solid var(--line);border-radius:14px}.soft-panel{background:var(--mist);padding:25px;border-radius:13px}.dark-panel{background:var(--deep);color:#e7f2f7;padding:27px;border-radius:14px}.dark-panel h2,.dark-panel h3{color:#fff}.two-col{display:grid;grid-template-columns:minmax(0,1fr) minmax(0,1fr);gap:32px;align-items:center}.wide-aside{display:grid;grid-template-columns:minmax(0,2fr) minmax(230px,1fr);gap:35px;align-items:start}.feature-cover{display:grid;grid-template-columns:minmax(0,1.08fr) 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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;width:auto;max-width:200px;background:transparent;padding:0;border-radius:0}.media-placeholder{min-height:88px;background:linear-gradient(120deg,#e6eef4,#f0f7fa);border:1px dashed #bfced7;font-size:12px;color:#64798a}.media-frame--logo.media-placeholder{min-height:32px;padding:0 6px}.index-list{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:0 45px}.index-item{padding:20px 0;border-top:1px solid var(--line)}.index-item b{display:block;color:var(--title);font-size:18px}.index-item p{font-size:15px;margin:6px 0}.index-item a{font-size:14px;font-weight:700}.editorial-grid{display:grid;grid-template-columns:minmax(0,2fr) minmax(0,1fr);gap:20px}.editorial-grid>.lead-story{background:#fff;border:1px solid var(--line);padding:26px;border-radius:13px}.editorial-stack{display:grid;gap:16px}.editorial-stack article{border-top:3px solid var(--brand);padding:17px 4px}.editorial-grid h3{margin:0 0 12px}.steps{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:15px;counter-reset:step}.steps>div{padding:20px;border-top:3px solid var(--brand);background:#fff;min-width:0}.steps>div:before{counter-increment:step;content:"0" counter(step);display:block;color:#0a7a90;font-size:15px;font-weight:800;margin-bottom:10px}.steps h3{font-size:18px}.flow-list{list-style:none;margin:0;padding:0;counter-reset:flow}.flow-list li{position:relative;margin-bottom:15px;padding:5px 0 22px 54px;border-bottom:1px solid var(--line)}.flow-list li:before{counter-increment:flow;content:counter(flow);position:absolute;left:0;top:2px;width:34px;height:34px;display:grid;place-items:center;border-radius:50%;color:#fff;background:var(--navy);font-weight:800}.section-tabs{display:flex;gap:8px;flex-wrap:wrap;margin:20px 0 36px;padding-bottom:10px;border-bottom:1px solid var(--line)}.section-tabs a{padding:7px 14px;background:#fff;border:1px solid var(--line);border-radius:8px;font-size:14px;text-decoration:none}.note{padding:18px 22px;border-left:4px solid var(--brand);background:var(--aqua);margin:22px 0}.note strong{color:var(--navy)}.fact-list{border-top:1px solid var(--line)}.fact-list>div{padding:14px 0;border-bottom:1px solid var(--line)}.fact-list b{display:block;color:var(--title)}.table-scroll{width:100%;overflow-x:auto;overscroll-behavior-x:contain;border:1px solid var(--line);border-radius:12px}table{border-collapse:collapse;width:100%;min-width:570px;background:#fff}caption{text-align:left;font-weight:700;padding:15px 17px;color:var(--title)}th,td{border-bottom:1px solid var(--line);padding:13px 16px;text-align:left;vertical-align:top;font-size:15px}th{background:var(--mist);color:var(--title);font-weight:700}tr:last-child td{border-bottom:0}.small-copy{font-size:14px;color:var(--sub)}.catalog{display:grid;grid-template-columns:minmax(0,1fr) minmax(0,1fr) minmax(0,1fr);gap:13px}.catalog article{padding:22px;background:#fff;border:1px solid var(--line);border-radius:10px}.catalog h3{margin-bottom:6px}.essay-layout{display:grid;grid-template-columns:minmax(0,2.3fr) minmax(230px,1fr);gap:45px}.essay-layout>*,.wide-aside>*{min-width:0}.sidebar-card{padding:23px;background:var(--mist);border-radius:12px}.sidebar-card h3{font-size:18px}.sidebar-card a{display:block;margin:10px 0}.gallery{display:grid;grid-template-columns:minmax(0,1.12fr) minmax(0,.88fr);gap:26px;align-items:start}.gallery article{min-width:0}.gallery article:nth-child(2){margin-top:45px}.gallery article:nth-child(3){grid-column:1/-1;display:grid;grid-template-columns:minmax(0,1fr) minmax(0,1fr);align-items:center;gap:25px;background:#fff;padding:18px;border-radius:12px}.faq details{padding:17px 0;border-bottom:1px solid var(--line)}.faq summary{cursor:pointer;color:var(--title);font-weight:700;line-height:1.5}.faq details p{margin:12px 20px 0 0}.service-layout{display:grid;grid-template-columns:minmax(205px,.8fr) minmax(0,2.2fr);gap:38px;align-items:start}.service-nav{padding:22px;background:#fff;border:1px solid var(--line);border-radius:12px}.service-nav a{display:block;padding:7px 0}.service-content>section{margin-bottom:48px}.related-links{display:flex;flex-wrap:wrap;gap:13px;margin:24px 0}.related-links a{border:1px solid #cbdde6;background:#fff;border-radius:8px;padding:10px 15px;text-decoration:none;font-size:14px;font-weight:700}.site-footer{background:#0B2539;color:#DCECF5;padding:46px 0 0}.footer-grid{display:grid;grid-template-columns:2fr 1fr 1fr;gap:40px}.site-footer h2{font-size:17px;color:#fff}.site-footer p{font-size:14px;max-width:440px}.site-footer a{display:block;color:#DCECF5;text-decoration:none;font-size:14px;margin:8px 0}.site-footer a:hover{text-decoration:underline}.footer-logo{display:flex!important;align-items:center;gap:10px}.footer-logo strong{font-size:14px}.footer-logo .brand-fallback{display:none}.footer-bottom{border-top:1px solid #30516a;padding:17px 0;margin-top:30px;font-size:12px}.mobile-shortcuts{display:none}.back-top{position:fixed;bottom:22px;right:22px;border:0;background:var(--navy);color:#fff;border-radius:50%;width:43px;height:43px;z-index:30}.back-top[hidden]{display:none}.reading-line{border-left:3px solid var(--brand);padding-left:20px;margin:22px 0}.spaced-list li{margin-bottom:9px}
@media(max-width:1200px){.container{width:min(calc(100% - 44px),var(--wrap))}.feature-cover{gap:23px}.section-space{margin-top:50px}}
@media(max-width:920px){.container{width:calc(100% - 44px)}.desktop-brand,.desktop-nav{display:none}.mobile-brand{display:grid;grid-template-columns:40px minmax(0,1fr) auto;align-items:center;gap:12px;min-height:63px}.mobile-brand .brand-logo{justify-self:center;min-width:0;gap:6px}.mobile-brand .brand-logo .media-frame{max-width:140px}.mobile-brand .brand-logo img{max-height:30px}.mobile-brand .brand-fallback{font-size:12px}.mobile-brand .register-link{padding:7px 11px;margin:0;font-size:12px;min-height:39px}.menu-toggle{display:flex;flex-direction:column;align-items:center;justify-content:center;gap:5px;width:40px;height:40px;border:1px solid var(--line);background:#fff;border-radius:8px}.menu-toggle span{width:19px;height:2px;background:var(--navy)}.mobile-drawer{display:block;position:fixed;left:0;top:0;bottom:0;z-index:101;width:min(86vw,340px);overflow:auto;background:#fff;transform:translateX(-110%);transition:transform .22s ease;visibility:hidden;padding:18px 22px;box-shadow:8px 0 22px #102e4625}.mobile-drawer.is-open{transform:translateX(0);visibility:visible}.drawer-top{display:flex;justify-content:space-between;align-items:center;padding:0 0 18px;border-bottom:1px solid var(--line);color:var(--navy)}.drawer-close{width:40px;height:40px;font-size:28px;border:0;background:var(--mist);border-radius:8px}.drawer-group{padding:20px 0 10px;border-bottom:1px solid var(--line)}.drawer-group>span{display:block;font-size:12px;color:var(--sub);font-weight:800;letter-spacing:.12em}.drawer-group a{display:block;padding:10px 0;text-decoration:none;color:var(--navy);font-weight:600}.drawer-overlay.is-visible{display:block;position:fixed;inset:0;background:#081c2aa9;z-index:100;visibility:visible;pointer-events:auto}.drawer-overlay:not(.is-visible){visibility:hidden;pointer-events:none}body.drawer-open{overflow:hidden}.mobile-shortcuts{display:flex;flex-wrap:wrap;gap:12px 20px;padding:15px 0 21px;border-top:1px solid var(--line);font-size:13px}.feature-cover h1{font-size:36px}.steps{grid-template-columns:repeat(2,minmax(0,1fr))}.footer-grid{grid-template-columns:1.5fr 1fr 1fr;gap:20px}.nojs-nav{display:flex;flex-wrap:wrap;gap:5px 15px;padding:10px 0;border-top:1px solid var(--line)}.nojs-nav a{font-size:13px}}
@media(max-width:760px){.page-shell{padding:30px 0 50px}.two-col,.wide-aside,.essay-layout,.service-layout,.editorial-grid,.gallery,.feature-cover{grid-template-columns:1fr}.feature-cover{padding:22px}.feature-cover .media-frame{grid-row:2}.gallery article:nth-child(2){margin:0}.gallery article:nth-child(3){grid-template-columns:1fr}.catalog{grid-template-columns:1fr}.index-list{gap:0 20px}.service-nav{order:2}.service-content{order:1}.footer-grid{grid-template-columns:1fr 1fr}.footer-identity{grid-column:1/-1}.section-space{margin-top:42px}}
@media(max-width:640px){body{font-size:15px;line-height:1.77}.container{width:calc(100% - 32px)}h1{font-size:28px}h2{font-size:22px}h3{font-size:18px}.feature-cover h1{font-size:30px}.feature-cover p,.page-intro p{font-size:15px}.section-space{margin-top:34px}.index-list,.steps{grid-template-columns:1fr}.index-item{padding:14px 0}.light-panel,.soft-panel,.dark-panel{padding:18px}.feature-cover{padding:18px;gap:20px}.two-col{gap:21px}.catalog article{padding:18px}.footer-grid{gap:15px}.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-frame--logo{--media-limit:30px}.action-group{gap:9px}.action-link{padding:10px 12px}.section-tabs a{font-size:13px;padding:6px 10px}.brand-descriptor{display:none}.site-footer{padding-top:32px}.footer-grid{grid-template-columns:1fr 1fr}.footer-identity{grid-column:1/-1}}
@media(max-width:380px){.mobile-brand{gap:6px}.mobile-brand .brand-logo .media-frame{max-width:105px}.mobile-brand .brand-fallback{font-size:10px}.mobile-brand .register-link{padding-inline:8px}.feature-cover h1{font-size:27px}}
@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}*,*:before,*:after{animation-duration:.01ms!important;transition-duration:.01ms!important}}