:root{--bg:#F4F7FA;--white:#fff;--light:#EAF1F6;--mint:#E9F8F8;--nav:#102E46;--deep:#163C57;--cyan:#13B8C5;--blue:#237BD3;--heading:#18364B;--text:#344C60;--muted:#64798A;--border:#DCE6ED;--footer:#0B2539}*{box-sizing:border-box}html{scroll-behavior:smooth;scroll-padding-top:28px}body{margin:0;background:var(--bg);color:var(--text);font-family:Arial,'PingFang SC','Microsoft YaHei',sans-serif;font-size:16px;line-height:1.8}body.drawer-open{overflow:hidden}a{color:#1767a7;text-decoration:none}a:hover{text-decoration:underline}button{font:inherit}img{max-width:100%}.wrap{width:min(1200px,calc(100% - 56px));margin-inline:auto}main{min-height:60vh;padding-bottom:70px}h1,h2,h3{color:var(--heading);line-height:1.38;margin:0 0 .7em;font-weight:750}h1{font-size:clamp(29px,3vw,42px)}h2{font-size:clamp(23px,2.15vw,28px)}h3{font-size:20px}p{margin:.6em 0 1.1em}ul,ol{padding-left:1.3em}li+li{margin-top:.4em}section{margin-block:58px}section 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.media-placeholder{min-height:170px}.section-heading{display:flex;align-items:baseline;justify-content:space-between;gap:24px;border-bottom:1px solid var(--border);padding-bottom:14px;margin-bottom:26px}.section-heading h2{margin:0}.section-heading p{max-width:380px;margin:0;color:var(--muted);font-size:14px}.directory{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:0 38px}.directory a{display:block;padding:19px 3px 20px;border-bottom:1px solid var(--border);color:inherit}.directory a:hover{text-decoration:none}.directory strong{display:block;color:var(--heading);font-size:18px;margin-bottom:5px}.directory span{font-size:14px;color:var(--muted)}.editorial-grid{display:grid;grid-template-columns:2fr 1fr;gap:24px}.editorial-main{background:#fff;border:1px solid var(--border);padding:30px 32px;border-top:4px solid var(--deep)}.editorial-side{display:grid;gap:18px}.editorial-side article{padding:23px;background:var(--mint);border-left:3px solid var(--cyan)}.split{display:grid;grid-template-columns:1fr 1fr;gap:35px;align-items:center}.split.wide-text{grid-template-columns:.8fr 1.2fr}.split.reverse{grid-template-columns:1.2fr .8fr}.split.reverse .media-frame{order:2}.band{padding:28px 32px;background:#fff;border-top:1px solid var(--border);border-bottom:1px solid var(--border)}.dark-band{background:var(--deep);padding:32px 38px;color:#e6f4f9;border-radius:12px}.dark-band h2,.dark-band h3{color:#fff}.dark-band a{color:#9de9ef}.note-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:18px}.note-grid article{padding:22px 24px;background:#fff;border:1px solid var(--border);border-radius:10px}.note-grid article:nth-child(2){transform:translateY(14px)}.steps{counter-reset:step;display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:14px;margin-top:24px}.steps article{padding:22px;background:var(--light);border-radius:10px}.steps article::before{counter-increment:step;content:'0' 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li::before{content:counter(item,decimal-leading-zero);font-size:23px;color:#088b95;font-weight:800}.tip{padding:18px 24px;border-left:4px solid var(--cyan);background:var(--mint);margin:24px 0}.topic-matrix{display:grid;grid-template-columns:repeat(3,1fr);gap:1px;background:var(--border);border:1px solid var(--border)}.topic-matrix article{background:#fff;padding:23px 25px}.topic-matrix h3{color:#087e94}.exhibit{display:grid;grid-template-columns:1fr 1fr;gap:36px;align-items:center;margin:40px 0}.exhibit:nth-of-type(even) .media-frame{order:2}.exhibit .media-frame{--media-limit:185px}.manual{max-width:870px;margin-inline:auto}.manual section{scroll-margin-top:24px}.manual .manual-heading{border-bottom:2px solid var(--border);padding-bottom:12px}.faq details{background:#fff;border:1px solid var(--border);padding:0 18px;margin-bottom:9px;border-radius:7px}.faq summary{cursor:pointer;font-weight:700;color:var(--heading);padding:13px 4px}.faq details p{margin:0;padding:2px 4px 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@media(max-width:1024px){.wrap{width:calc(100% - 44px)}.brand-subtitle{font-size:12px}.editorial-grid{grid-template-columns:1.6fr 1fr}.reading-layout{grid-template-columns:minmax(0,1fr) 210px;gap:22px}.split{gap:22px}}
@media(max-width:920px){.brand-bar{height:63px;gap:14px;justify-content:space-between}.menu-toggle{display:flex;flex-direction:column;justify-content:center;gap:5px;border:0;background:transparent;padding:0;min-width:40px;height:40px;cursor:pointer}.menu-toggle span{display:block;height:2px;width:23px;background:var(--heading);margin-left:8px}.brand{margin-inline:auto;min-width:0}.brand-logo{max-height:29px;max-width:min(42vw,200px)}.brand-name{font-size:19px}.brand-name small{font-size:8px}.brand-subtitle,.desktop-nav{display:none}.entry-link{margin:0;padding:7px 11px;font-size:12px;min-height:38px;display:inline-flex;align-items:center}.drawer-overlay{display:block;position:fixed;inset:0;z-index:30;background:rgba(4,20,32,.57);opacity:0;visibility:hidden;pointer-events:none;transition:opacity .2s,visibility .2s}.drawer-overlay.is-visible{opacity:1;visibility:visible;pointer-events:auto}.mobile-drawer{display:flex;flex-direction:column;position:fixed;inset:0 auto 0 0;width:min(86vw,340px);z-index:31;background:#fff;transform:translateX(-105%);transition:transform .22s;overflow-y:auto;padding:15px 20px 40px;box-shadow:4px 0 14px #102e4622}.mobile-drawer.is-open{transform:translateX(0)}.drawer-top{display:flex;align-items:center;justify-content:space-between;color:var(--heading);border-bottom:1px solid var(--border)}.drawer-close{font-size:32px;border:0;background:transparent;width:43px;height:43px;cursor:pointer;color:var(--heading)}.drawer-group{margin:20px 0 5px;color:#087e94;font-size:12px;font-weight:800;letter-spacing:1px}.mobile-drawer>a{display:block;padding:10px 12px;color:var(--heading);border-bottom:1px solid var(--border)}.mobile-quick{display:flex;justify-content:space-around;flex-wrap:wrap;gap:12px;margin-bottom:23px;font-size:13px}.reading-layout{grid-template-columns:1fr}.fact-rail{position:static;max-width:none}.fact-rail ul{display:flex;flex-wrap:wrap;gap:6px 25px}.footer-grid{gap:26px}}
@media(max-width:760px){.hero,.split,.split.wide-text,.split.reverse,.editorial-grid,.reading-layout,.support-layout,.exhibit{grid-template-columns:1fr}.hero .hero-copy{order:0}.split.reverse .media-frame,.exhibit:nth-of-type(even) .media-frame{order:0}.hero .media-frame{order:1}.editorial-side{grid-template-columns:1fr 1fr}.topic-matrix{grid-template-columns:1fr}.steps{grid-template-columns:1fr 1fr}.note-grid{grid-template-columns:1fr}.note-grid article:nth-child(2){transform:none}.support-index{position:static;order:2}.support-body{order:1}.related-links{grid-template-columns:1fr 1fr}.footer-grid{grid-template-columns:1fr 1fr}.footer-grid>div{grid-column:span 2}.exhibit .media-frame{max-width:560px}.text-columns{columns:1}}
@media(max-width:640px){.wrap{width:calc(100% - 32px)}body{font-size:15px;line-height:1.8}main{padding-bottom:36px}h1{font-size:clamp(27px,7vw,32px)}h2{font-size:clamp(20px,5.5vw,23px)}h3{font-size:18px}section{margin-block:38px}.page-intro{margin-top:20px;padding:23px 18px}.page-intro h1{font-size:clamp(25px,6.4vw,29px)}.lead{font-size:15px}.hero{margin-top:26px}.hero h1{font-size:29px}.hero p{font-size:15px}.media-frame{padding:7px}.media-frame--hero{--media-limit:205px}.media-frame--feature{--media-limit:185px}.media-frame--card,.exhibit .media-frame{--media-limit:145px}.media-frame--wide{--media-limit:135px}.media-frame--rules{--media-limit:175px}.media-frame--mobile{--media-limit:285px;max-width:250px}.section-heading{display:block}.section-heading p{margin-top:8px}.directory{grid-template-columns:1fr}.editorial-main{padding:20px}.editorial-side{grid-template-columns:1fr}.editorial-side article{padding:19px}.band,.dark-band{padding:22px 19px}.steps{grid-template-columns:1fr}.steps article{padding:18px}.related-links{grid-template-columns:1fr}.note-grid article{padding:20px}.footer-grid{grid-template-columns:1fr;gap:22px}.footer-grid>div{grid-column:auto}.footer-bottom{flex-direction:column}.anchor-nav{gap:7px}.anchor-nav a{font-size:13px;padding:7px 11px}.numbered li{grid-template-columns:36px 1fr;padding:14px}.numbered li::before{font-size:19px}}
@media(prefers-reduced-motion:reduce){*,*::before,*::after{scroll-behavior:auto!important;transition:none!important;animation:none!important}}