:root{--bg:#F4F7FA;--white:#fff;--pale:#EAF1F6;--mint:#E9F8F8;--navy:#102E46;--deep:#163C57;--teal:#13B8C5;--blue:#237BD3;--heading:#18364B;--body:#344C60;--sub:#64798A;--line:#DCE6ED;--radius:14px}*{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}body.drawer-open{overflow:hidden}img{max-width:100%}a{color:#1366a7;text-underline-offset:3px}a:hover{color:#075584}button{font:inherit;cursor:pointer}button:focus-visible,a:focus-visible,summary:focus-visible{outline:3px solid #087dba;outline-offset:3px}h1,h2,h3{color:var(--heading);line-height:1.38;margin:0 0 .75em}h1{font-size:clamp(32px,3.1vw,36px);letter-spacing:-.02em}h2{font-size:clamp(24px,2.3vw,28px)}h3{font-size:clamp(18px,1.75vw,21px)}p{margin:0 0 1.13em}ul,ol{padding-left:1.45em}li{margin:.25em 0}strong{color:var(--heading)}.shell{max-width:1200px;padding-left:28px;padding-right:28px;margin:0 auto;min-width:0}.section{margin-top:62px;margin-bottom:62px}.section-tight{margin-top:38px;margin-bottom:38px}.eyebrow{font-size:12px;text-transform:uppercase;letter-spacing:.17em;font-weight:700;color:#147e87;margin:0 0 12px}.lead{font-size:17px;color:#496173;max-width:820px}.muted{color:var(--sub)}.surface{background:var(--white);border:1px solid var(--line);border-radius:var(--radius);padding:26px}.tinted{background:var(--pale)}.mint{background:var(--mint)}.dark-band{background:var(--deep);color:#e6f1f6;border-radius:16px;padding:34px}.dark-band h2,.dark-band h3,.dark-band strong{color:#fff}.dark-band a{color:#b8f7fa}.pill-link,.primary-link{display:inline-flex;align-items:center;min-height:43px;padding:8px 19px;border-radius:9px;background:var(--navy);color:#fff;text-decoration:none;font-weight:700}.pill-link:hover,.primary-link:hover{background:#22597d;color:#fff}.text-link{font-weight:700}.button-row{display:flex;flex-wrap:wrap;gap:12px;margin-top:22px}.button-row .secondary{background:var(--mint);color:var(--navy);border:1px solid #c8e3e7}.skip-link{position:absolute;z-index:40;top:-70px;left:15px;background:#fff;padding:8px}.skip-link:focus{top:10px}.site-header{background:#fff}.brand-bar{height:72px;display:flex;align-items:center;gap:23px}.brand{display:flex;align-items:center;min-width:0;text-decoration:none;color:var(--navy)}.brand .media-frame{background:transparent;padding:0;border:0;width:auto}.brand .media-frame img{max-height:38px;max-width:210px}.brand-fallback{font-size:23px;white-space:nowrap}.brand-fallback small{display:block;font-size:9px;letter-spacing:.1em;line-height:1.1}.brand-tagline{font-size:13px;color:var(--sub);border-left:1px solid var(--line);padding-left:22px;white-space:nowrap}.entry-link{margin-left:auto;display:flex;align-items:center;justify-content:center;white-space:nowrap;color:#fff;background:var(--deep);font-size:14px;font-weight:700;text-decoration:none;border-radius:9px;min-height:42px;padding:0 22px}.entry-link:hover{background:#236181;color:#fff}.desktop-nav{background:var(--navy)}.nav-inner{display:flex;justify-content:space-between;align-items:stretch;min-height:50px;gap:5px}.nav-inner>a{display:flex;align-items:center;justify-content:center;color:#dbeef7;min-width:0;white-space:nowrap;text-decoration:none;font-size:14px;padding:0 13px;position:relative}.nav-inner>a:hover{color:white;background:#214c69}.nav-inner>a[aria-current=page]{color:#fff;font-weight:700}.nav-inner>a[aria-current=page]:after{content:"";position:absolute;bottom:0;left:20%;right:20%;height:3px;background:var(--teal)}.menu-toggle,.nojs-nav,.drawer-overlay,.mobile-drawer{display:none}.breadcrumbs{font-size:13px;display:flex;align-items:center;gap:11px;color:var(--sub);margin:22px 0 30px}.breadcrumbs a{text-decoration:none}.page-header{padding:20px 0 32px;border-bottom:1px solid var(--line)}.page-header .lead{margin-bottom:0}.hero{display:grid;grid-template-columns:minmax(0,1.04fr) minmax(0,.96fr);align-items:center;gap:36px;padding-top:48px}.hero h1{font-size:clamp(38px,3.7vw,44px)}.hero-copy p{max-width:560px}.media-frame{display:flex;align-items:center;justify-content:center;width:100%;min-width:0;max-width:100%;padding:8px;border-radius:14px;background:var(--pale);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--article{--media-limit:220px}.media-frame--wide{--media-limit:210px}.media-frame--mobile{--media-limit:350px;max-width:320px;margin:auto}.media-frame--logo{background:transparent;padding:0;--media-limit:38px}.media-placeholder{min-height:100px;border:1px dashed #bdced9;color:#6b8391;font-size:13px;text-align:center}.media-placeholder.media-frame--hero{min-height:185px}.media-placeholder.media-frame--mobile{min-height:200px}.media-placeholder span{padding:12px}.two-col,.feature-split,.sidebar-layout,.service-layout,.editor-focus,.exhibit-row{display:grid;gap:32px;min-width:0}.two-col{grid-template-columns:repeat(2,minmax(0,1fr))}.feature-split{grid-template-columns:minmax(0,1fr) minmax(0,1fr);align-items:center;gap:42px}.sidebar-layout{grid-template-columns:minmax(0,2.3fr) minmax(225px,.8fr);gap:40px}.editor-focus{grid-template-columns:minmax(0,2fr) minmax(240px,1fr)}.service-layout{grid-template-columns:230px minmax(0,1fr)}.exhibit-row{grid-template-columns:minmax(0,1fr) minmax(0,1fr);align-items:center}.feature-split>*,.two-col>*,.sidebar-layout>*,.editor-focus>*,.service-layout>*,.exhibit-row>*{min-width:0}.text-column{max-width:790px}.readable{max-width:800px}.topic-index{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:0 32px;border-top:1px solid var(--line)}.topic-item{padding:21px 0 17px;border-bottom:1px solid var(--line)}.topic-item h3{margin-bottom:8px}.topic-item p{font-size:15px;margin-bottom:6px}.number{font-size:13px;font-weight:700;color:#20838c;letter-spacing:.1em;margin-right:8px}.compact-stack>article{padding:17px 0;border-bottom:1px solid var(--line)}.compact-stack>article:first-child{padding-top:0}.compact-stack>article:last-child{border-bottom:0}.rule-tiles{display:grid;grid-template-columns:1fr 1fr 1fr;gap:16px;align-items:start}.rule-tiles>article{border-top:3px solid var(--teal);padding:22px;background:white;border-radius:0 0 12px 12px}.rule-tiles>article:nth-child(2){margin-top:23px}.rule-tiles>article:nth-child(3){margin-top:46px}.route-steps,.steps{counter-reset:step;list-style:none;padding:0}.route-steps{display:grid;grid-template-columns:repeat(4,1fr);gap:18px}.route-steps li,.steps li{counter-increment:step;position:relative;min-width:0}.route-steps li{border-top:2px solid var(--teal);padding:20px 10px 0 0}.route-steps li:before,.steps li:before{content:counter(step,decimal-leading-zero);display:block;color:#148895;font-weight:800;font-size:14px;margin-bottom:7px}.steps li{border-left:2px solid #b7dce3;padding:3px 0 20px 25px}.local-nav{display:flex;flex-wrap:wrap;align-items:center;gap:10px;padding:14px 18px;background:#eaf1f6;border-radius:12px;margin:25px 0 38px}.local-nav strong{font-size:14px;margin-right:6px}.local-nav a{padding:4px 12px;background:#fff;border:1px solid #d7e4eb;border-radius:8px;font-size:14px;text-decoration:none}.article-section{margin:42px 0;scroll-margin-top:22px}.article-section h2{margin-bottom:18px}.aside-note{padding:22px;background:var(--mint);border-left:4px solid var(--teal);font-size:14px}.aside-note h3{font-size:18px}.table-scroll{max-width:100%;overflow-x:auto;border:1px solid var(--line);border-radius:12px;background:#fff}table{width:100%;border-collapse:collapse;font-size:15px;min-width:580px}caption{text-align:left;font-weight:700;padding:16px 18px;color:var(--heading)}th,td{padding:13px 17px;border-top:1px solid var(--line);text-align:left;vertical-align:top}th{color:var(--heading);background:#edf5f8;font-weight:700}tbody tr:nth-child(even){background:#f8fbfd}.article-media{max-width:850px;margin:30px 0}.definition-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:16px}.definition-grid article{padding:21px;border:1px solid var(--line);background:white;border-radius:12px}.definition-grid h3{font-size:19px}.tactical-block{display:grid;grid-template-columns:150px minmax(0,1fr);gap:25px;align-items:start;border-top:1px solid var(--line);padding:26px 0}.tactical-block .label{font-weight:700;color:#148895}.project-matrix{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:15px}.project-matrix article{padding:24px 23px;background:white;border:1px solid var(--line);border-top:4px solid var(--teal);border-radius:12px}.project-matrix h3{margin-bottom:12px}.exhibit-row:nth-child(even) .exhibit-copy{order:-1}.quote{font-size:20px;line-height:1.65;font-weight:700;border-left:4px solid var(--teal);padding-left:23px;color:var(--deep);margin:25px 0}.faq-list{border-top:1px solid var(--line)}.faq-list details{padding:16px 2px;border-bottom:1px solid var(--line)}.faq-list summary{font-weight:700;color:var(--heading);cursor:pointer;line-height:1.6;padding-right:10px}.faq-list details p{margin:12px 0 3px;max-width:800px}.service-menu{border:1px solid var(--line);border-radius:12px;background:#fff;padding:18px;align-self:start}.service-menu a{display:block;padding:9px 6px;border-bottom:1px solid var(--line)}.service-menu a:last-child{border:0}.notice{padding:24px;border:1px solid #cde3e8;background:var(--mint);border-radius:12px}.related{display:flex;flex-wrap:wrap;gap:10px;margin-top:22px}.related a{display:inline-flex;border:1px solid var(--line);padding:7px 13px;border-radius:9px;background:white;text-decoration:none;font-size:14px;font-weight:700}.mobile-quick{display:none}.site-footer{background:#0B2539;color:#DCECF5;padding:46px 0 20px}.footer-grid{display:grid;grid-template-columns:1.7fr 1fr;gap:65px}.footer-brand{font-size:22px;font-weight:800;color:white}.footer-brand span{font-size:11px;letter-spacing:.15em;margin-left:10px}.site-footer p{font-size:14px;color:#d0e2ed;max-width:700px}.site-footer strong{color:#fff}.footer-links{display:grid;grid-template-columns:1fr 1fr;gap:7px 15px;margin-top:14px}.site-footer a{color:#e1f4ff;font-size:14px}.footer-bottom{font-size:12px;border-top:1px solid #315065;padding-top:17px;margin-top:24px;color:#b5cbda}.back-top{position:fixed;bottom:22px;right:22px;width:44px;height:44px;background:#163c57;color:white;border:0;border-radius:12px;z-index:5}.back-top[hidden]{display:none}
@media(max-width:1024px){.shell{padding-left:22px;padding-right:22px}.section{margin-top:48px;margin-bottom:48px}.brand-tagline{font-size:12px;padding-left:14px}.nav-inner>a{padding:0 8px;font-size:13px}.hero{gap:25px}.sidebar-layout{gap:25px}}
@media(max-width:920px){.brand-bar{height:62px;display:grid;grid-template-columns:40px minmax(0,1fr) auto;gap:10px}.brand{justify-content:center}.brand-tagline,.desktop-nav{display:none}.brand .media-frame img{max-height:30px;max-width:158px}.entry-link{margin:0;padding:0 13px;min-height:40px;font-size:13px}.menu-toggle{display:flex;width:40px;height:40px;border:1px solid #cfdee5;border-radius:9px;background:#fff;align-items:center;justify-content:center;flex-direction:column;gap:4px}.menu-toggle span{width:18px;height:2px;background:var(--navy);border-radius:5px}.drawer-overlay{display:block;position:fixed;inset:0;background:rgba(9,33,49,.49);z-index:20;opacity:0;visibility:hidden;pointer-events:none;transition:opacity .2s,visibility .2s}.drawer-overlay.is-open{opacity:1;visibility:visible;pointer-events:auto}.mobile-drawer{display:block;position:fixed;top:0;bottom:0;left:0;width:min(86vw,340px);background:white;z-index:21;transform:translateX(-105%);visibility:hidden;transition:transform .22s,visibility .22s;overflow-y:auto;box-shadow:7px 0 30px #0b253928}.mobile-drawer.is-open{transform:translateX(0);visibility:visible}.drawer-top{display:flex;justify-content:space-between;align-items:center;padding:18px 20px;border-bottom:1px solid var(--line)}.drawer-close{width:40px;height:40px;border:1px solid var(--line);border-radius:9px;background:white;font-size:27px;line-height:1}.mobile-drawer nav{padding:8px 18px 28px}.mobile-drawer nav a{display:block;padding:11px 12px;text-decoration:none;color:var(--heading);border-radius:8px}.mobile-drawer nav a[aria-current]{background:var(--mint);border-left:3px solid var(--teal);font-weight:700}.drawer-group{font-size:12px;color:var(--sub);font-weight:700;text-transform:uppercase;letter-spacing:.12em;margin:17px 12px 4px}.nojs-nav{display:none}.mobile-quick{display:flex;flex-wrap:wrap;gap:13px 22px;padding-top:22px;padding-bottom:22px;border-top:1px solid var(--line);font-size:13px}.mobile-quick a{text-decoration:none;font-weight:700}}
@media(max-width:760px){.two-col,.sidebar-layout,.editor-focus,.feature-split,.exhibit-row,.service-layout{grid-template-columns:1fr;gap:22px}.hero{grid-template-columns:1fr}.exhibit-row:nth-child(even) .exhibit-copy{order:0}.sidebar-layout aside{order:2}.service-layout .service-menu{order:2}.route-steps{grid-template-columns:repeat(2,minmax(0,1fr))}.rule-tiles{grid-template-columns:1fr}.rule-tiles>article:nth-child(n){margin-top:0}.project-matrix,.definition-grid{grid-template-columns:1fr 1fr}.footer-grid{grid-template-columns:1fr;gap:23px}.hero-copy{max-width:680px}}
@media(max-width:640px){body{font-size:15px;line-height:1.78}.shell{padding-left:16px;padding-right:16px}.section{margin-top:36px;margin-bottom:36px}.section-tight{margin-top:27px;margin-bottom:27px}.hero{padding-top:26px;gap:22px}.hero h1{font-size:clamp(27px,7vw,32px)}h1{font-size:clamp(25px,6.4vw,29px)}h2{font-size:clamp(20px,5.5vw,23px)}h3{font-size:clamp(17px,4.8vw,19px)}.lead{font-size:15px}.surface,.dark-band{padding:19px}.topic-index{grid-template-columns:1fr}.topic-item{padding:17px 0}.button-row{gap:9px}.button-row a{font-size:13px;padding:8px 13px}.local-nav{padding:13px;gap:8px}.local-nav strong{width:100%}.media-frame--hero{--media-limit:205px}.media-frame--feature{--media-limit:185px}.media-frame--card{--media-limit:145px}.media-frame--article{--media-limit:175px}.media-frame--wide{--media-limit:135px}.media-frame--mobile{--media-limit:285px;max-width:250px}.media-placeholder.media-frame--hero{min-height:145px}.article-section{margin:30px 0}.project-matrix,.definition-grid{grid-template-columns:1fr}.route-steps{gap:12px}.tactical-block{grid-template-columns:1fr;gap:5px}.footer-brand span{display:block;margin:0}.site-footer{padding-top:34px}}
@media(max-width:380px){.brand-bar{gap:4px}.brand .media-frame img{max-width:123px}.brand-fallback{font-size:17px}.entry-link{padding:0 8px;font-size:12px}.shell{padding-left:16px;padding-right:16px}}
@media(prefers-reduced-motion:reduce){*,*:before,*:after{scroll-behavior:auto!important;animation-duration:.01ms!important;transition-duration:.01ms!important}}
@media(max-width:920px){@supports not (selector(:has(*))){.nojs-nav{display:none}}}