:root{--bg:#F4F7FA;--paper:#fff;--tint:#EAF1F6;--aqua:#E9F8F8;--nav:#102E46;--nav2:#163C57;--cyan:#13B8C5;--blue:#237BD3;--title:#18364B;--body:#344C60;--muted:#64798A;--line:#DCE6ED;--radius:14px}*{box-sizing:border-box}html{scroll-behavior:smooth;scroll-padding-top:24px}body{margin:0;background:var(--bg);color:var(--body);font:16px/1.82 Arial,"PingFang SC","Microsoft YaHei",sans-serif}body.drawer-open{overflow:hidden}a{color:#176CB4;text-underline-offset:4px}a:hover{color:#064B84}button{font:inherit;cursor:pointer}img{max-width:100%}h1,h2,h3{color:var(--title);line-height:1.38;letter-spacing:-.015em}h1{font-size:clamp(32px,3vw,36px);margin:0 0 18px}h2{font-size:clamp(23px,2.25vw,28px);margin:0 0 20px}h3{font-size:20px;margin:0 0 10px}p{margin:0 0 17px}ul,ol{padding-left:1.4em}li+li{margin-top:8px}section{scroll-margin-top:28px}.shell{width:min(1200px,calc(100% - 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var(--line)}.brand-inner{height:72px;display:flex;gap:22px;align-items:center}.brand{display:flex;align-items:center;color:var(--nav);text-decoration:none;flex:none;min-width:0}.brand img{display:block;width:auto;height:auto;max-height:38px;max-width:205px;object-fit:contain}.brand-text{font-size:22px;font-weight:800;line-height:1}.brand-text small{display:block;margin-top:6px;font-size:9px;letter-spacing:.1em}.brand-tagline{font-size:13px;color:var(--muted);padding-left:18px;border-left:1px solid var(--line)}.entry-link{margin-left:auto;display:inline-flex;align-items:center;justify-content:center;white-space:nowrap;gap:12px;background:var(--nav);color:#fff;text-decoration:none;border-radius:8px;padding:9px 19px;font-size:14px;font-weight:700}.entry-link:hover{background:#1C5676;color:#fff}.desktop-nav{background:var(--nav)}.nav-inner{display:grid;grid-template-columns:repeat(7,minmax(0,1fr));gap:6px;min-height:50px}.desktop-nav 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@media(max-width:920px){.brand-inner{height:62px;justify-content:space-between;gap:10px}.brand{position:absolute;left:50%;transform:translateX(-50%)}.brand img{max-height:30px;max-width:150px}.brand-text{font-size:18px}.brand-text small{font-size:8px}.brand-tagline,.desktop-nav{display:none}.entry-link{margin-left:auto;font-size:12px;padding:9px 11px;min-height:40px;gap:3px}.entry-link span{display:none}.menu-toggle{width:40px;height:40px;border:1px solid var(--line);border-radius:8px;background:#fff;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:4px;flex:none}.menu-toggle span{height:2px;width:19px;background:var(--nav);border-radius:2px}.drawer-mask{display:block;position:fixed;inset:0;background:rgba(7,30,45,.6);z-index:49;opacity:0;visibility:hidden;pointer-events:none;transition:opacity .2s,visibility .2s}.mobile-drawer{display:block;position:fixed;left:0;top:0;height:100dvh;overflow-y:auto;width:min(86vw,340px);background:#fff;z-index:50;transform:translateX(-105%);visibility:hidden;pointer-events:none;transition:transform .2s,visibility .2s;padding:20px 24px 35px;box-shadow:10px 0 35px #0D304130}.drawer-open .drawer-mask{opacity:1;visibility:visible;pointer-events:auto}.drawer-open .mobile-drawer{transform:translateX(0);visibility:visible;pointer-events:auto}.drawer-heading{display:flex;align-items:center;justify-content:space-between;color:var(--title);font-size:18px}.drawer-close{border:1px solid var(--line);background:#fff;width:40px;height:40px;font-size:27px;line-height:1;border-radius:8px}.drawer-group{margin:26px 0 6px;color:#008893;font-size:12px;font-weight:800;letter-spacing:.12em}.mobile-drawer a{display:block;padding:11px 6px;border-bottom:1px solid var(--line);text-decoration:none;color:var(--title);font-weight:700}.mobile-quick{display:flex;justify-content:space-around;gap:12px;border-top:1px solid var(--line);padding:18px 0 0;margin-top:45px}.mobile-quick a{font-size:13px;text-decoration:none}.service-layout{grid-template-columns:190px minmax(0,1fr);gap:25px}.side-layout{grid-template-columns:1fr}.aside-index{max-width:none}.nav-inner{display:none}}
@media(max-width:760px){.hero-cover,.visual-split,.visual-split.reversed,.feature-split,.two-col,.rules-layout,.service-layout,.mobile-help{grid-template-columns:1fr}.hero-cover{padding-top:38px}.visual-split.reversed .media-frame{order:0}.three-notes{grid-template-columns:1fr;gap:12px}.three-notes article:nth-child(n){margin-top:0}.reading-route{grid-template-columns:1fr 1fr}.fact-grid{grid-template-columns:1fr 1fr}.gallery{grid-template-columns:1fr 1fr;gap:16px}.gallery article:nth-child(even){margin-top:0}.rules-toc{position:static}.service-content{order:0}.service-aside{order:1}.related-links{grid-template-columns:1fr}.footer-grid{grid-template-columns:1fr;gap:20px}.page-intro{padding-top:32px}}
@media(max-width:640px){body{font-size:15px;line-height:1.79}.shell{width:calc(100% - 32px)}h1{font-size:clamp(25px,7vw,29px)}h2{font-size:clamp(20px,5.5vw,23px)}h3{font-size:18px}.hero-cover h1{font-size:clamp(27px,7.6vw,32px)}.hero-cover .lead,.lead{font-size:15px}.page-intro{padding-bottom:20px}.section-space{margin-block:34px}.page-section{margin:35px auto}.hero-cover{gap:18px;padding-bottom:10px}.directory-grid{grid-template-columns:1fr}.directory-entry{padding:17px 0}.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}.white-panel,.soft-panel{padding:18px}.feature-big{padding:24px}.feature-big h3{font-size:21px}.gallery,.fact-grid{grid-template-columns:1fr}.reading-route{gap:9px}.reading-route a{padding:13px}.footer-grid{padding:35px 0 22px}.footer-bottom{flex-direction:column;gap:5px}.footer-links{gap:5px}.quote-note{font-size:15px}.desktop-nav{display:none}.anchor-nav{gap:7px}.anchor-nav a{padding:6px 11px;font-size:13px}}
@media(max-width:380px){.brand img{max-width:118px;max-height:28px}.brand-text{font-size:16px}.entry-link{font-size:11px;padding:8px}.button-pair .btn{padding:9px 13px}.reading-route{grid-template-columns:1fr}}
@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}*,*:before,*:after{animation-duration:.01ms!important;transition-duration:.01ms!important}}
@media(min-width:921px){.nojs-nav{display:none}}@media(max-width:920px){.nojs-nav{display:none;flex-wrap:wrap;gap:10px;padding-top:10px;padding-bottom:10px}.nojs-nav a{font-size:13px}}@media(max-width:920px){body:not(.js-enabled) .nojs-nav{display:flex}body:not(.js-enabled) .menu-toggle{display:none}body:not(.js-enabled) .brand{position:static;transform:none}body:not(.js-enabled) .brand-inner{justify-content:space-between}}