:root{--bg:#f4f7fa;--paper:#fff;--soft:#eaf1f6;--mint:#e9f8f8;--nav:#102e46;--nav2:#163c57;--teal:#13b8c5;--blue:#237bd3;--title:#18364b;--body:#344c60;--muted:#64798a;--line:#dce6ed;--footer:#0b2539;--max:1200px}*{box-sizing:border-box}html{scroll-behavior:smooth;scroll-padding-top:22px}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}a{color:#116ea7;text-decoration:none}a:hover{text-decoration:underline}a:focus-visible,button:focus-visible,summary:focus-visible{outline:3px solid var(--teal);outline-offset:3px}button{font:inherit;cursor:pointer}img{max-width:100%;height:auto}h1,h2,h3{color:var(--title);line-height:1.38;letter-spacing:-.02em}h1{font-size:clamp(29px,3.4vw,43px);margin:12px 0 18px}h2{font-size:clamp(22px,2.3vw,28px);margin:0 0 18px}h3{font-size:19px;margin:0 0 12px}p{margin:0 0 15px}ul,ol{padding-left:1.4em}li+li{margin-top:8px}.wrap{width:min(calc(100% - 56px),var(--max));margin-inline:auto}.skip-link{position:absolute;left:16px;top:-100px;background:#fff;padding:8px 14px;z-index:200}.skip-link:focus{top:12px}.site-header{position:relative;z-index:20}.brand-bar{background:#fff;border-bottom:1px solid var(--line)}.brand-inner{height:72px;display:flex;align-items:center;gap:22px}.brand{display:inline-flex;align-items:center;min-width:0;color:var(--title)}.brand img{display:block;max-height:38px;width:auto;object-fit:contain}.brand-fallback{display:flex;flex-direction:column;line-height:1.15}.brand-fallback strong{font-size:22px}.brand-fallback small{font-size:10px;letter-spacing:2px}.brand-tagline{font-size:13px;color:var(--muted);border-left:1px solid var(--line);padding-left:20px;margin-right:auto}.entry-link{background:var(--nav);color:#fff;border-radius:9px;padding:8px 22px;font-weight:700;white-space:nowrap}.entry-link:hover{background:var(--nav2);color:#fff;text-decoration:none}.desktop-navigation{background:var(--nav)}.desktop-navigation-inner{display:grid;grid-template-columns:repeat(7,minmax(0,1fr));min-height:50px}.desktop-navigation a{position:relative;display:flex;align-items:center;justify-content:center;color:#dcecf5;font-size:15px;font-weight:500;white-space:nowrap}.desktop-navigation a:hover,.desktop-navigation a.is-active{color:#fff;text-decoration:none;font-weight:700}.desktop-navigation a.is-active:after{content:"";height:3px;width:34px;background:var(--teal);position:absolute;bottom:0}.menu-toggle{display:none;border:0;background:transparent;width:40px;height:40px;padding:10px;flex-shrink:0}.menu-toggle span{display:block;height:2px;margin:4px 0;background:var(--nav);border-radius:3px}.drawer-overlay{position:fixed;inset:0;background:rgba(9,29,45,.57);opacity:0;visibility:hidden;pointer-events:none;z-index:35;transition:opacity .22s,visibility .22s}.drawer-overlay.is-visible{opacity:1;visibility:visible;pointer-events:auto}.mobile-drawer{position:fixed;left:0;top:0;bottom:0;width:min(86vw,340px);background:#fff;z-index:36;overflow-y:auto;transform:translateX(-102%);visibility:hidden;transition:transform .24s,visibility .24s;padding:16px 20px;box-shadow:8px 0 35px #102e4625}.mobile-drawer.is-open{transform:translateX(0);visibility:visible}.drawer-header{display:flex;justify-content:space-between;align-items:center;border-bottom:1px solid var(--line);padding-bottom:10px;color:var(--title)}.drawer-close{font-size:29px;border:0;background:transparent;width:42px;height:42px}.drawer-group{padding:15px 0;border-bottom:1px solid var(--line)}.drawer-group p{color:var(--muted);font-size:12px;letter-spacing:.15em;font-weight:700}.drawer-group a{display:block;padding:9px 12px;color:var(--body);border-radius:7px}.drawer-group a[aria-current]{font-weight:700;color:#066b87;background:var(--mint)}.no-js-navigation{display:none}.eyebrow{font-size:12px;color:#087f91;letter-spacing:.16em;font-weight:800;text-transform:uppercase;margin:0 0 10px}.page-intro{padding:54px 0 33px;border-bottom:1px solid var(--line)}.page-intro h1{font-size:clamp(25px,3vw,36px)}.page-lead{font-size:17px;max-width:830px;line-height:1.85;color:#4c6475}.section{padding-block:54px}.section-heading{margin-bottom:28px;max-width:830px}.section-heading>p:last-child{color:var(--muted)}.panel{background:var(--paper);border:1px solid var(--line);border-radius:13px;padding:26px}.panel-soft{background:var(--soft)}.panel-mint{background:var(--mint)}.panel-dark{background:var(--nav);color:#e2f1fa;border-color:var(--nav)}.panel-dark h2,.panel-dark h3{color:#fff}.columns-2{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:26px}.columns-3{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:20px}.wide-narrow{display:grid;grid-template-columns:minmax(0,2fr) minmax(0,1fr);gap:27px}.article-narrow{max-width:800px}.article-text p{max-width:800px}.article-text h2{margin-top:35px}.article-text h3{margin-top:24px}.subnav{display:flex;gap:10px;flex-wrap:wrap;margin:23px 0}.subnav a{padding:7px 15px;background:#fff;border:1px solid var(--line);border-radius:100px;font-size:14px;font-weight:700}.subnav a:hover{background:var(--mint);text-decoration:none}.media-frame{display:flex;justify-content:center;align-items:center;margin:0;width:100%;min-width:0;padding:9px;background:var(--soft);border:1px solid var(--line);border-radius:14px}.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--banner{--media-limit:210px}.media-frame--mobile{--media-limit:350px;max-width:320px}.media-frame--missing{min-height:100px;color:#698493;font-size:13px;letter-spacing:.06em}.media-frame--hero.media-frame--missing{min-height:205px}.media-frame--feature.media-frame--missing{min-height:150px}.media-frame--mobile.media-frame--missing{min-height:200px}.hero{background:linear-gradient(118deg,#edf6f8 0%,#f7f9fb 65%);border-bottom:1px solid var(--line)}.hero-inner{display:grid;grid-template-columns:minmax(0,52fr) minmax(0,48fr);gap:34px;align-items:center;padding-block:52px}.hero h1{max-width:600px}.hero p{max-width:650px}.hero-links{display:flex;flex-wrap:wrap;gap:12px;margin-top:25px}.btn{display:inline-flex;align-items:center;justify-content:center;padding:9px 21px;border-radius:9px;font-weight:700;background:var(--nav);color:#fff}.btn.secondary{background:#fff;color:var(--nav);border:1px solid #bed2de}.btn:hover{color:#fff;background:var(--nav2);text-decoration:none}.btn.secondary:hover{color:var(--nav);background:var(--mint)}.topic-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:0 38px;border-top:1px solid var(--line)}.topic-row{padding:22px 0;border-bottom:1px solid var(--line);display:grid;grid-template-columns:47px 1fr;gap:16px;min-width:0}.topic-num{font-size:22px;font-weight:800;color:#2ba8b0}.topic-row h3{margin-bottom:5px}.topic-row p{color:var(--muted);margin:0 0 8px;font-size:15px}.text-link{font-weight:700;font-size:14px}.feature-spotlight{display:grid;grid-template-columns:2fr 1fr;gap:24px}.feature-main{background:#fff;padding:30px;border:1px solid var(--line);border-top:4px solid var(--teal)}.feature-side{display:grid;gap:18px}.feature-side article{border-bottom:1px solid var(--line);padding:18px;background:#fff}.feature-side article:last-child{border-bottom:0}.split-feature{display:grid;grid-template-columns:minmax(0,43fr) minmax(0,57fr);gap:38px;align-items:center}.split-feature.reverse{grid-template-columns:minmax(0,57fr) minmax(0,43fr)}.split-feature.reverse .media-frame{order:2}.rule-bites{display:grid;grid-template-columns:1fr 1fr 1fr;gap:20px;align-items:start}.rule-bites article:nth-child(2){margin-top:24px}.rule-bites article:nth-child(3){margin-top:47px}.reading-path{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:12px;counter-reset:path}.reading-path a{background:#fff;border-top:3px solid var(--teal);padding:20px;border-radius:0 0 10px 10px;min-width:0}.reading-path a:before{counter-increment:path;content:"0" counter(path);display:block;font-size:23px;font-weight:800;color:#1699a5}.reading-path strong,.reading-path span{display:block}.reading-path span{font-size:14px;color:var(--muted);margin-top:6px}.reading-path a:hover{text-decoration:none;background:var(--mint)}.reading-links{padding-block:46px 60px}.reading-link-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:14px}.reading-link{display:flex;flex-direction:column;gap:6px;padding:20px;background:white;border:1px solid var(--line);border-radius:11px;min-width:0}.reading-link strong{font-size:18px;color:var(--title)}.reading-link span{font-size:14px;color:var(--muted)}.reading-link span:last-child{color:#138ca2;font-size:20px;align-self:flex-end}.reading-link:hover{text-decoration:none;border-color:var(--teal)}.table-scroll{overflow-x:auto;max-width:100%;border:1px solid var(--line);border-radius:11px;background:#fff}table{width:100%;border-collapse:collapse;min-width:560px}caption{text-align:left;padding:14px 16px;color:var(--title);font-weight:700}th,td{padding:15px 16px;text-align:left;vertical-align:top;border-bottom:1px solid var(--line)}th{background:var(--soft);color:var(--title)}tr:last-child td{border-bottom:0}.steps{counter-reset:step;list-style:none;padding:0;margin:0;display:grid;gap:13px}.steps li{background:white;border-left:3px solid var(--teal);padding:17px 20px;margin:0}.steps li::before{counter-increment:step;content:counter(step,decimal-leading-zero);font-weight:800;color:#009aaa;display:block}.steps li strong{display:block;color:var(--title)}.mini-index{padding:23px;background:var(--mint);border-radius:12px}.mini-index a{display:block;padding:10px 0;border-bottom:1px solid #d3e7e7;font-weight:700}.mini-index a:last-child{border:0}.quote{font-size:21px;line-height:1.65;border-left:4px solid var(--teal);padding:12px 23px;color:var(--title);margin:20px 0}.case-notes{background:var(--soft);border-radius:12px;padding:21px}.exhibit{display:grid;grid-template-columns:1fr 1fr;gap:24px;align-items:center;margin-bottom:28px}.exhibit:nth-child(even) .media-frame{order:2}.exhibit p{max-width:580px}.faq-list{display:grid;gap:10px}.faq-list details{border:1px solid var(--line);border-radius:9px;padding:0 18px;background:#fff}.faq-list summary{color:var(--title);font-weight:700;cursor:pointer;padding:13px 3px}.faq-list details p{padding:2px 3px 15px}.service-layout{display:grid;grid-template-columns:minmax(210px,270px) minmax(0,1fr);gap:32px}.service-side{align-self:start;background:#fff;border:1px solid var(--line);padding:20px;border-radius:12px}.service-side a{display:block;padding:8px 0;border-bottom:1px solid var(--line)}.service-side a:last-child{border:0}.service-content section+section{margin-top:43px}.service-content h2{margin-bottom:17px}.editor-note{font-size:14px;border-top:1px solid var(--line);padding-top:22px;color:var(--muted)}.mobile-quick-links{display:none}.site-footer{background:var(--footer);color:#dcecf5;padding-top:44px}.footer-main{display:grid;grid-template-columns:1.5fr 1fr;gap:60px;padding-bottom:35px}.footer-about p{max-width:560px;font-size:14px}.footer-name{font-size:23px;font-weight:800;color:#fff}.footer-name span{font-size:11px;font-weight:600;letter-spacing:2px;margin-left:8px}.footer-nav h2{font-size:17px;color:#fff}.footer-nav nav{display:grid;grid-template-columns:repeat(2,1fr);gap:8px}.footer-nav a{color:#dcecf5;font-size:14px}.footer-bottom{border-top:1px solid #2b4b61;display:flex;justify-content:space-between;gap:20px;flex-wrap:wrap;padding-block:18px;font-size:12px;color:#b0c9d7}.back-to-top{position:fixed;bottom:20px;right:20px;background:var(--nav);color:#fff;border:0;width:43px;height:43px;border-radius:50%;z-index:12;box-shadow:0 4px 12px #102e462b}.back-to-top[hidden]{display:none}
@media(max-width:1024px){.wrap{width:min(calc(100% - 44px),var(--max))}.columns-3{gap:13px}.hero-inner{gap:24px}}@media(max-width:920px){.brand-inner{height:62px;display:grid;grid-template-columns:40px minmax(0,1fr) auto;gap:10px}.menu-toggle{display:block}.brand{justify-content:center;max-width:100%;overflow:hidden}.brand img{max-height:30px;max-width:100%}.brand-tagline{display:none}.entry-link{font-size:13px;padding:7px 11px}.desktop-navigation{display:none}.no-js-navigation{display:flex;flex-wrap:wrap;gap:8px;padding-block:12px}.no-js-navigation a{padding:4px 10px;background:#fff;border:1px solid var(--line);border-radius:5px;font-size:13px}.footer-main{gap:24px}}@media(max-width:760px){.hero-inner,.split-feature,.split-feature.reverse,.feature-spotlight,.wide-narrow,.service-layout{grid-template-columns:1fr}.split-feature.reverse .media-frame,.exhibit:nth-child(even) .media-frame{order:initial}.columns-3{grid-template-columns:1fr 1fr}.split-feature{gap:22px}.service-side{order:2}.service-content{order:1}.reading-path{grid-template-columns:repeat(2,minmax(0,1fr))}.exhibit{grid-template-columns:1fr}.rule-bites{grid-template-columns:1fr}.rule-bites article:nth-child(n){margin-top:0}.footer-main{grid-template-columns:1fr}.mobile-quick-links{display:flex;justify-content:space-between;gap:8px;flex-wrap:wrap;padding-block:17px}.mobile-quick-links a{font-size:13px}.page-intro{padding-top:35px}}@media(max-width:640px){.wrap{width:calc(100% - 32px)}body{font-size:15px;line-height:1.78}h1{font-size:clamp(27px,7vw,32px)}h2{font-size:22px}h3{font-size:18px}.section{padding-block:35px}.hero-inner{padding-block:30px}.hero-inner .media-frame{margin-top:5px}.page-lead{font-size:15px}.panel{padding:18px}.topic-grid,.columns-2,.columns-3,.reading-link-grid{grid-template-columns:1fr}.topic-row{padding-block:16px}.feature-main{padding:19px}.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--banner{--media-limit:135px}.media-frame--mobile{--media-limit:285px;max-width:250px}.reading-links{padding-block:30px 40px}.reading-link-grid{gap:10px}.reading-link{padding:15px}.footer-name span{display:block;margin:2px 0}.footer-bottom{display:block}.footer-bottom span{display:block;margin-bottom:6px}.reading-path a{padding:14px}.quote{font-size:18px}}
@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}*,*:before,*:after{animation-duration:.01ms!important;transition-duration:.01ms!important}}