:root{--bg:#f4f7fa;--white:#fff;--soft:#eaf1f6;--aqua:#e9f8f8;--nav:#102e46;--nav2:#163c57;--teal:#13b8c5;--blue:#237bd3;--heading:#18364b;--text:#344c60;--muted:#64798a;--line:#dce6ed;--footer:#0b2539;--space:clamp(30px,4.2vw,64px)}*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;background:var(--bg);color:var(--text);font:16px/1.8 Arial,'PingFang SC','Microsoft YaHei',sans-serif;overflow-x:hidden}h1,h2,h3,h4,p,figure{margin-top:0}h1,h2,h3{color:var(--heading);line-height:1.4}h1{font-size:clamp(27px,3.2vw,42px);letter-spacing:-.025em;margin-bottom:18px}h2{font-size:clamp(21px,2.2vw,28px);margin-bottom:18px}h3{font-size:clamp(18px,1.7vw,21px);margin-bottom:10px}p{margin-bottom:16px}a{color:#116395;text-decoration:none}a:hover{text-decoration:underline}a:focus-visible,button:focus-visible,summary:focus-visible{outline:3px solid #0aa7b5;outline-offset:3px}button{font:inherit;cursor:pointer}.container{width:min(1200px,calc(100% - 56px));margin-inline:auto}.site-main{min-height:65vh}.skip-link{position:absolute;top:-80px;left:16px;padding:8px 16px;background:white;z-index:110}.skip-link:focus{top:8px}.site-header{background:#fff;position:relative;z-index:20}.brand-row{height:72px;display:flex;align-items:center;gap:19px}.brand{display:flex;align-items:center;min-width:0;flex-shrink:0}.brand img{display:block;max-height:38px;width:auto;max-width:240px;object-fit:contain}.brand-fallback{font-size:23px;color:var(--nav);font-weight:800;line-height:1.1}.brand-fallback small{display:block;font-size:10px;letter-spacing:3px}.brand-description{font-size:13px;color:var(--muted)}.register-link,.button{background:var(--nav);color:white;padding:9px 20px;border-radius:10px;font-weight:700;display:inline-flex;align-items:center;justify-content:center;text-align:center}.register-link{margin-left:auto;white-space:nowrap}.register-link:hover,.button:hover{background:var(--nav2);color:white;text-decoration:none}.button--alt{background:#0b8f9b}.desktop-nav{background:var(--nav)}.desktop-nav-inner{display:flex;justify-content:space-between;gap:4px}.desktop-nav a{color:#e7f0f5;display:block;padding:11px 14px 12px;white-space:nowrap;font-size:15px;font-weight:600;border-bottom:3px solid transparent}.desktop-nav a:hover,.desktop-nav a.is-current{border-bottom-color:var(--teal);color:#fff;text-decoration:none}.menu-toggle{display:none}.mobile-drawer,.drawer-overlay{display:none}.nojs-nav{display:none}.page-section{margin-block:var(--space)}.page-section:first-child{margin-top:38px}.section-heading{display:flex;align-items:baseline;justify-content:space-between;gap:20px;border-bottom:1px solid var(--line);margin-bottom:24px;padding-bottom:12px}.section-heading h2{margin:0}.eyebrow{font-size:12px;letter-spacing:.14em;text-transform:uppercase;color:#0a7684;font-weight:bold;display:block;margin-bottom:10px}.lead{font-size:17px;line-height:1.85;color:#405e70;max-width:780px}.hero{display:grid;grid-template-columns:minmax(0,1.08fr) minmax(0,1fr);gap:32px;align-items:center;padding:25px 0 5px}.hero-actions{display:flex;gap:12px;flex-wrap:wrap;margin-top:26px}.hero-actions a:not(.button){align-self:center;font-weight:700}.media-frame{min-width:0;display:flex;justify-content:center;align-items:center;background:var(--soft);border-radius:14px;padding:8px;margin:0;width:100%;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--banner{--media-limit:210px}.media-frame--mobile{--media-limit:350px;max-width:320px;margin-inline:auto}.media-placeholder{width:100%;min-height:85px;display:grid;place-items:center;text-align:center;color:#657e8f;background:linear-gradient(135deg,#eaf1f6,#f6fafb);border:1px dashed #bccbd4;border-radius:9px;font-size:13px;padding:20px}.index-grid{display:grid;grid-template-columns:1fr 1fr;gap:0 28px}.index-item{padding:19px 0;border-bottom:1px solid var(--line);min-width:0}.index-item h3{margin-bottom:4px}.index-item p{margin:0 0 5px}.feature-grid{display:grid;grid-template-columns:2fr 1fr;gap:22px}.feature-large{background:#fff;border-left:5px solid var(--teal);padding:27px}.feature-stack{display:grid;gap:14px}.feature-small{padding:20px;background:var(--soft);border-radius:12px}.feature-small p:last-child,.feature-large p:last-child{margin:0}.split{display:grid;grid-template-columns:minmax(0,1fr) minmax(0,1.1fr);gap:34px;align-items:center}.split--reverse{grid-template-columns:minmax(0,1.13fr) minmax(0,1fr)}.soft-band{background:var(--aqua);padding:30px;border-radius:15px}.deep-band{background:var(--nav2);color:#e9f3f8;padding:32px;border-radius:14px}.deep-band h2,.deep-band h3{color:white}.rules-mini{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:20px}.rules-mini article{border-top:3px solid var(--teal);padding:18px 8px 0}.rules-mini article:nth-child(2){margin-top:22px}.rules-mini article:nth-child(3){margin-top:44px}.steps{list-style:none;counter-reset:step;display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:16px;margin:0;padding:0}.steps li{counter-increment:step;border-top:2px solid var(--line);padding:15px 4px 0;min-width:0}.steps li::before{content:'0' counter(step);display:block;color:#0c8490;font-size:25px;font-weight:800}.steps strong{display:block;color:var(--heading)}.article-header{padding:42px 0 20px;border-bottom:1px solid var(--line)}.article-header h1{font-size:clamp(25px,2.8vw,36px)}.breadcrumbs{font-size:13px;color:var(--muted);margin-bottom:14px}.article-layout{display:grid;grid-template-columns:minmax(0,1fr) 260px;gap:44px;align-items:start}.article-body{max-width:800px;min-width:0}.article-body h2{margin-top:34px}.article-body h3{margin-top:22px}.sidebar{background:#fff;border:1px solid var(--line);border-radius:12px;padding:22px;font-size:14px}.sidebar h2{font-size:19px}.sidebar a{display:block;padding:7px 0;border-top:1px solid var(--line)}.anchor-nav{display:flex;flex-wrap:wrap;gap:10px;margin:22px 0 28px}.anchor-nav a{border:1px solid #b8d2df;background:#fff;border-radius:8px;padding:6px 14px;font-weight:700}.reading-block{background:white;border:1px solid var(--line);border-radius:12px;padding:25px;margin-block:24px}.note{border-left:4px solid var(--teal);background:var(--aqua);padding:17px 20px;margin:20px 0;border-radius:0 10px 10px 0}.number-list{list-style:none;counter-reset:point;padding:0}.number-list li{counter-increment:point;border-bottom:1px solid var(--line);padding:12px 0 12px 48px;position:relative}.number-list li:before{content:counter(point);position:absolute;left:0;top:14px;border-radius:50%;background:var(--nav);color:white;width:30px;height:30px;text-align:center;line-height:30px;font-weight:bold}.table-scroll{overflow-x:auto;max-width:100%;margin:20px 0;border:1px solid var(--line);border-radius:12px;background:white}table{border-collapse:collapse;min-width:560px;width:100%;line-height:1.65}caption{text-align:left;padding:12px 16px;font-weight:bold;color:var(--heading)}th,td{padding:13px 16px;text-align:left;vertical-align:top;border-bottom:1px solid var(--line)}th{background:var(--soft);color:var(--heading)}tr:last-child td{border-bottom:0}.cards-three{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:16px}.text-card{padding:22px;background:white;border:1px solid var(--line);border-radius:12px}.gallery-grid{display:grid;grid-template-columns:1fr 1fr;gap:24px}.gallery-item{min-width:0}.gallery-item:nth-child(2){margin-top:40px}.gallery-item .media-frame{margin-bottom:16px}.faq details{background:white;border:1px solid var(--line);border-radius:10px;margin-bottom:10px;padding:0 17px}.faq summary{cursor:pointer;padding:13px 0;font-weight:bold;color:var(--heading)}.faq details p{padding:0 0 14px;margin:0}.related-links{display:flex;flex-wrap:wrap;gap:10px;margin-top:24px}.related-links a{padding:10px 16px;background:white;border:1px solid var(--line);border-radius:9px;font-weight:700}.small-print{font-size:13px;color:var(--muted)}.site-footer{background:var(--footer);color:#dcecf5;margin-top:60px;padding:38px 0 20px}.footer-inner{display:flex;justify-content:space-between;gap:45px}.footer-inner>div{max-width:730px}.footer-inner strong{font-size:22px;color:white}.footer-inner strong span{font-size:12px;letter-spacing:.07em}.footer-inner p{font-size:13px;line-height:1.8;margin:8px 0}.footer-inner nav{display:grid;align-content:start;grid-template-columns:repeat(2,max-content);gap:8px 20px}.footer-inner a{color:#dcecf5;font-size:14px}.footer-bottom{border-top:1px solid #345369;margin-top:24px;padding-top:15px;font-size:12px;color:#b4d1de}.mobile-quick{display:none}.back-top{opacity:0;visibility:hidden;pointer-events:none;position:fixed;right:19px;bottom:20px;border:0;border-radius:50%;background:var(--nav);color:white;width:42px;height:42px;z-index:10;transition:opacity .2s}.back-top.visible{opacity:1;visibility:visible;pointer-events:auto}.service-layout{display:grid;grid-template-columns:235px minmax(0,1fr);gap:35px}.service-side{align-self:start;position:sticky;top:20px}.service-side a{display:block;padding:9px 12px;border-bottom:1px solid var(--line)}.article-main{max-width:900px;min-width:0}section[id],article[id]{scroll-margin-top:25px}
@media(max-width:1200px){.container{width:calc(100% - 44px)}.desktop-nav a{padding-inline:9px;font-size:14px}}
@media(max-width:920px){.container{width:calc(100% - 44px)}.brand-row{height:63px;justify-content:space-between;gap:12px}.menu-toggle{display:flex;flex:0 0 40px;width:40px;height:40px;border:1px solid var(--line);border-radius:9px;background:#fff;flex-direction:column;justify-content:center;align-items:center;gap:5px}.menu-toggle span{display:block;width:20px;height:2px;background:var(--nav)}.brand img{max-height:30px;max-width:min(38vw,180px)}.brand-fallback{font-size:16px}.brand-fallback small{font-size:8px}.brand-description,.desktop-nav{display:none}.register-link{margin-left:0;padding:7px 10px;font-size:13px;min-height:38px}.drawer-overlay{display:block;position:fixed;inset:0;background:rgba(7,27,43,.57);opacity:0;visibility:hidden;pointer-events:none;z-index:40;transition:opacity .2s,visibility .2s}.mobile-drawer{display:block;position:fixed;inset:0 auto 0 0;width:min(86vw,340px);max-height:100dvh;overflow-y:auto;background:white;transform:translateX(-105%);visibility:hidden;pointer-events:none;z-index:41;box-shadow:10px 0 30px rgba(0,0,0,.1);transition:transform .22s,visibility .22s;padding:20px}.drawer-open{overflow:hidden}.drawer-open .drawer-overlay{opacity:1;visibility:visible;pointer-events:auto}.drawer-open .mobile-drawer{transform:translateX(0);visibility:visible;pointer-events:auto}.drawer-top{display:flex;justify-content:space-between;align-items:center;border-bottom:1px solid var(--line);padding-bottom:12px}.drawer-top strong{color:var(--heading)}.drawer-close{border:0;background:var(--soft);font-size:28px;width:40px;height:40px;border-radius:9px;line-height:1}.drawer-group{margin-top:23px}.drawer-group span{font-size:12px;letter-spacing:.08em;color:var(--muted);font-weight:700}.drawer-group a{display:block;color:var(--heading);padding:10px 6px;border-bottom:1px solid var(--line)}.drawer-group a.is-current{border-left:3px solid var(--teal);padding-left:13px;font-weight:700}.nojs-nav{display:flex;flex-wrap:wrap;gap:4px 16px;padding:14px 0}.mobile-quick{display:flex;flex-wrap:wrap;gap:10px 20px;margin-top:34px;font-size:13px;justify-content:center}.article-layout{grid-template-columns:1fr}.sidebar{display:none}}
@media(max-width:760px){.hero,.split,.split--reverse,.feature-grid,.service-layout{grid-template-columns:1fr}.hero{gap:20px}.article-layout{gap:20px}.service-side{position:static;order:2}.article-main{order:1}.steps{grid-template-columns:repeat(2,minmax(0,1fr))}.cards-three{grid-template-columns:1fr 1fr}.footer-inner{flex-direction:column;gap:12px}}
@media(max-width:640px){.container{width:calc(100% - 32px)}body{font-size:15px;line-height:1.78}.page-section:first-child{margin-top:25px}.article-header{padding-top:27px}.lead{font-size:15.5px}.hero h1{font-size:29px}.media-frame--hero{--media-limit:205px}.media-frame--feature{--media-limit:185px}.media-frame--card{--media-limit:145px}.media-frame--banner{--media-limit:135px}.media-frame--mobile{--media-limit:285px;max-width:250px}.index-grid,.gallery-grid,.cards-three,.rules-mini{grid-template-columns:1fr}.gallery-item:nth-child(2),.rules-mini article:nth-child(2),.rules-mini article:nth-child(3){margin-top:0}.rules-mini{gap:8px}.feature-large,.soft-band,.deep-band,.reading-block{padding:20px}.feature-stack{gap:10px}.steps{gap:14px}.anchor-nav{gap:7px}.anchor-nav a{font-size:13px;padding:5px 9px}.table-scroll th,.table-scroll td{padding:11px}.site-footer{margin-top:36px}.footer-inner nav{gap:8px 16px}.footer-inner strong{font-size:20px}}
@media(max-width:370px){.register-link{font-size:12px;padding:7px 8px}.brand img{max-width:36vw}.brand-row{gap:7px}.hero-actions{gap:8px}.hero-actions .button{padding:8px 12px}.steps{grid-template-columns:1fr}}
@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}*,*:before,*:after{animation-duration:.01ms!important;transition-duration:.01ms!important}}