:root{--bg:#F4F7FA;--white:#fff;--pale:#EAF1F6;--mint:#E9F8F8;--navy:#102E46;--deep:#163C57;--teal:#13B8C5;--blue:#237BD3;--title:#18364B;--text:#344C60;--muted:#64798A;--border:#DCE6ED;--footer:#0B2539;--space:clamp(30px,4.4vw,62px)}*{box-sizing:border-box}html{scroll-behavior:smooth;scroll-padding-top:25px}body{margin:0;color:var(--text);background:var(--bg);font-family:Arial,"PingFang SC","Microsoft YaHei",sans-serif;font-size:16px;line-height:1.8;overflow-wrap:break-word}img{max-width:100%}a{color:#1261a1;text-underline-offset:3px}a:hover{color:#067987}a:focus-visible,button:focus-visible,summary:focus-visible{outline:3px solid #009ca9;outline-offset:3px}button{font:inherit;cursor:pointer}.container{width:min(100% - 56px,1200px);margin-inline:auto}.site-header{background:#fff}.brand-bar{display:flex;align-items:center;gap:22px;height:72px;min-width:0}.brand{display:flex;align-items:center;min-width:0;flex-shrink:0;text-decoration:none;color:var(--navy)}.brand 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@media(max-width:920px){.container{width:calc(100% - 44px)}.brand-bar{height:62px;display:grid;grid-template-columns:40px minmax(0,1fr) auto;gap:10px}.brand{justify-self:center;max-width:100%}.brand img{max-height:30px;max-width:min(43vw,230px)}.brand-wordmark{font-size:19px}.brand-wordmark small{font-size:9px}.brand-subtitle,.desktop-nav{display:none}.registration{margin:0;min-height:40px;padding:0 11px;font-size:13px}.menu-toggle{display:flex;width:40px;height:40px;border:1px solid var(--border);background:#fff;border-radius:8px;align-items:center;justify-content:center;flex-direction:column;gap:4px}.menu-toggle span{display:block;width:19px;height:2px;background:var(--navy)}.drawer-backdrop{display:block;position:fixed;inset:0;background:rgba(10,32,48,.52);z-index:30;opacity:0;visibility:hidden;pointer-events:none;transition:opacity .18s,visibility .18s}.drawer-backdrop.is-open{opacity:1;visibility:visible;pointer-events:auto}.mobile-drawer{display:block;position:fixed;left:0;top:0;bottom:0;width:min(86vw,340px);background:white;z-index:31;transform:translateX(-102%);visibility:hidden;pointer-events:none;transition:transform .2s,visibility .2s;overflow-y:auto;box-shadow:5px 0 25px #0001}.mobile-drawer.is-open{transform:translateX(0);visibility:visible;pointer-events:auto}.drawer-active{overflow:hidden}.drawer-head{display:flex;justify-content:space-between;align-items:center;padding:16px 20px;border-bottom:1px solid var(--border)}.drawer-close{border:0;background:#eaf1f6;border-radius:8px;width:42px;height:42px;font-size:30px;line-height:1}.mobile-drawer nav{padding:12px 20px 30px}.mobile-drawer nav p{font-size:12px;color:var(--muted);font-weight:800;letter-spacing:.1em;margin:18px 0 4px}.mobile-drawer nav a{display:block;text-decoration:none;padding:9px 12px;color:var(--title);border-radius:7px;font-weight:700}.mobile-drawer nav a.is-current{background:var(--mint);border-left:3px solid var(--teal)}.noscript-nav{display:flex;flex-wrap:wrap;gap:6px;padding-block:8px}.noscript-nav a{display:inline-block;padding:5px 10px;border:1px solid var(--border);border-radius:7px}.mobile-quick{display:flex;flex-wrap:wrap;gap:15px;padding-block:20px;border-top:1px solid var(--border);font-size:14px}.mobile-quick a{text-decoration:none}}
@media(max-width:760px){.grid-2,.grid-3,.split,.split-main,.focus-layout,.exhibit,.exhibit:nth-child(even),.manual-layout,.service-layout,.footer-layout{grid-template-columns:minmax(0,1fr)}.exhibit:nth-child(even)>.exhibit-text{order:initial}.cover{grid-template-columns:1fr;padding-block:30px}.cover .media-frame{max-width:700px}.rule-tiles{grid-template-columns:1fr}.rule-tiles article:nth-child(n){margin:0}.route{grid-template-columns:repeat(2,minmax(0,1fr))}.manual-index{position:static;display:flex;flex-wrap:wrap;gap:10px}.service-menu{order:2}.footer-layout{gap:25px}.section{margin-block:38px}.page-intro{padding-top:15px}.side-index{max-width:none}}
@media(max-width:640px){.container{width:calc(100% - 32px)}body{font-size:15px}.lead{font-size:16px}h1{font-size:clamp(25px,7.1vw,29px)}.cover h1{font-size:clamp(27px,7.7vw,32px)}h2{font-size:21px}h3{font-size:18px}.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-missing{min-height:85px}.media-frame--hero.media-missing{min-height:125px}.surface,.soft-panel,.dark-panel,.focus-main{padding:19px}.directory{grid-template-columns:1fr;padding:5px 18px}.directory article:nth-last-child(2){border-bottom:1px solid var(--border)}.directory article:last-child{border:0}.actions{gap:8px}.pill-link{padding:8px 12px}.route{gap:7px}.route a{padding:12px}.route a:before{font-size:20px}.section-heading{display:block}.footer-brand span{display:block;margin-left:0}.registration{font-size:12px;padding:0 9px}.brand img{max-width:min(39vw,190px)}.brand-wordmark small{display:none}}
@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}*,*:before,*:after{transition:none!important;animation:none!important}}