*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;background:#F7F8FC;color:#38445A;font:16px/1.78 system-ui,-apple-system,"Microsoft YaHei","PingFang SC",sans-serif;overflow-wrap:anywhere}a{color:#354c78;text-decoration:none}a:hover{color:#7566AB;text-decoration:underline}a:focus-visible,button:focus-visible,input:focus-visible{outline:3px solid #7566AB;outline-offset:3px}button,input{font:inherit}button{cursor:pointer}img{max-width:100%;height:auto;object-fit:contain;object-position:center;display:block}.wrap{max-width:1160px;margin:auto;padding-inline:28px}.skip{position:absolute;top:-70px;left:16px;z-index:20;background:white;padding:8px}.skip:focus{top:8px}.site-header{background:white;border-bottom:1px solid #E2E8F1}.header-row{min-height:70px;display:flex;align-items:center;gap:30px}.brand{display:inline-flex;align-items:center;gap:9px;flex-shrink:0;color:#202B43}.brand img{max-height:30px;width:auto}.brand-cn{font-weight:750;font-size:22px;white-space:nowrap}.brand-en{font-size:10px;letter-spacing:.12em;color:#637189}.primary,.header-actions,.ribbon-inner,.ribbon-inner>div{display:flex;align-items:center;gap:22px}.primary{margin-left:auto}.primary a,.ribbon a{white-space:nowrap}.header-actions{gap:14px}.icon-button{min-width:44px;min-height:44px;border:1px solid #E2E8F1;border-radius:10px;background:#fff;color:#202B43;font-size:24px;line-height:1}.menu-button{display:none}.no-js-menu{display:none}.ribbon{background:#EEF3FA}.ribbon-inner{min-height:40px;justify-content:space-between;gap:18px;font-size:13px}.ribbon-inner>span{color:#637189}.ribbon-inner>div{gap:22px}.ribbon a[aria-current=page],.primary a[aria-current=page]{color:#7566AB;text-decoration:underline;text-decoration-thickness:2px;text-underline-offset:6px}main{padding-top:34px;padding-bottom:70px}h1,h2,h3{color:#202B43;line-height:1.33;overflow-wrap:anywhere}h1{font-size:32px;margin:8px 0 14px}h2{font-size:25px;margin:0 0 18px}h3{font-size:19px;margin:0 0 10px}p{margin:0 0 16px}.eyebrow{color:#7566AB;font-size:13px;font-weight:700;letter-spacing:.11em}.lead{max-width:72ch;color:#52617a}.section{margin-top:54px}.section-head{display:flex;justify-content:space-between;align-items:baseline;gap:18px;margin-bottom:20px}.section-head p{max-width:65ch}.hero,.split,.duo,.feature,.article-lead{display:grid;grid-template-columns:minmax(0,1fr) minmax(0,.72fr);gap:34px;align-items:center}.hero{min-height:260px}.hero-copy p{max-width:65ch}.hero-media{max-height:260px}.image-box,.image-fallback{background:#EEF3FA;border-radius:12px;min-width:0;display:flex;justify-content:center;align-items:center;padding:12px}.image-box img{max-width:100%;max-height:180px;width:auto;height:auto;object-fit:contain}.image-fallback{color:#637189;text-align:center;min-height:120px;font-size:17px}.hero-media img{max-height:236px}.hero-media.image-fallback{min-height:210px}.action-row{display:flex;gap:12px;flex-wrap:wrap;margin-top:20px}.action{display:inline-flex;align-items:center;justify-content:center;min-height:44px;border:1px solid #D9E7F6;border-radius:10px;padding:9px 17px;font-weight:650;background:#fff}.action.primary-action{background:#202B43;color:#fff;border-color:#202B43}.feature{grid-template-columns:minmax(0,.48fr) minmax(0,1fr);background:#fff;border:1px solid #E2E8F1;padding:20px;border-radius:12px}.feature .image-box img{max-height:160px}.feature .image-fallback{min-height:140px}.cards{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:16px}.card{background:#fff;border:1px solid #E2E8F1;border-radius:12px;padding:20px;min-width:0}.card .image-box img{max-height:145px}.card .image-fallback{min-height:130px}.card h3{margin-top:15px}.card p{font-size:15px}.duo{grid-template-columns:1.15fr .85fr;align-items:stretch}.duo>.card{display:grid;grid-template-columns:minmax(0,1fr) minmax(0,.65fr);gap:14px}.duo>.card:nth-child(2){display:block}.duo .image-box img{max-height:145px}.editorial{display:grid;grid-template-columns:minmax(0,.65fr) minmax(0,1fr);gap:30px;align-items:center}.three-notes{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:16px}.three-notes article{border-left:2px solid #7566AB;padding:0 12px}.soft{background:#EEF3FA;border-radius:12px;padding:24px}.footer-bits{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:16px}.footer-bits article{padding-top:16px;border-top:1px solid #D9E7F6}.faq-teaser{background:#fff;border:1px solid #E2E8F1;border-radius:12px;padding:20px}.article-heading{margin:8px 0 22px}.article-heading .lead{font-size:17px}.article-lead{grid-template-columns:minmax(0,.6fr) minmax(0,1fr);align-items:start;background:#fff;border:1px solid #E2E8F1;border-radius:12px;padding:20px}.article-lead .image-box img{max-height:240px}.article-lead .image-fallback{min-height:150px}.article-body{max-width:790px;margin:35px auto 0}.article-body section{margin:0 0 34px}.article-body h2{font-size:24px}.article-body p{max-width:76ch}.article-body ul{padding-left:24px}.article-body li{margin-bottom:8px}.reading-tip{border-left:3px solid #7566AB;background:#EEF3FA;padding:16px 20px;margin:25px 0;border-radius:0 10px 10px 0}.related{border-top:1px solid #E2E8F1;padding-top:22px;margin-top:34px}.related a{display:inline-flex;margin:0 14px 12px 0;min-height:44px;align-items:center}.layout-b .article-lead{display:block}.layout-b .article-lead>.image-box,.layout-b .article-lead>.image-fallback{max-width:680px;margin:auto}.layout-b .article-lead .image-box img{max-height:240px}.layout-b .article-body{max-width:930px}.layout-b .article-body section{display:inline-block;width:calc(50% - 18px);vertical-align:top;margin-right:14px}.layout-c .article-lead{display:none}.layout-c .article-heading+.image-box,.layout-c .article-heading+.image-fallback{max-width:610px;margin:0 0 22px}.layout-c .article-heading+.image-box img{max-height:220px}.layout-c .article-shell{display:grid;grid-template-columns:minmax(0,210px) minmax(0,1fr);gap:34px}.layout-c .article-body{margin:0;max-width:790px}.toc{align-self:start;background:#EEF3FA;border-radius:12px;padding:18px}.toc a{display:block;padding:8px 0}.site-footer{background:#202B43;color:#e6ebf5;padding:40px 0}.site-footer a,.site-footer h2,.site-footer .brand-cn{color:white}.site-footer .brand-en{color:#c6d1e5}.footer-brand p{font-size:14px;max-width:650px;margin:14px 0 24px}.footer-grid{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:22px}.footer-grid nav{display:flex;flex-direction:column;align-items:flex-start;gap:5px}.footer-grid h2{font-size:17px;margin:0 0 8px}.footer-grid a{font-size:14px;min-height:29px}.mobile-tail{display:none}.overlay[hidden],.search-results a[hidden]{display:none!important}.overlay{position:fixed;inset:0;z-index:100;display:flex;justify-content:flex-end}.shade{position:absolute;inset:0;background:#172039b8}.panel{position:relative;z-index:1;background:#F7F8FC;width:min(100%,660px);height:100%;overflow-y:auto;padding:24px;box-shadow:-8px 0 32px #17203922}.panel-top{display:flex;align-items:center;justify-content:space-between;gap:16px;border-bottom:1px solid #E2E8F1;padding-bottom:16px;margin-bottom:18px}.panel-top h2{margin:0;font-size:23px}.menu-groups{display:grid;grid-template-columns:1fr 1fr;gap:22px}.menu-groups section{display:grid;grid-template-columns:1fr 1fr;gap:6px}.menu-groups h3{grid-column:1/-1;color:#7566AB}.menu-groups a,.search-results a{display:block;padding:8px;border-radius:7px;min-height:44px}.menu-groups a:hover,.search-results a:hover{background:#EEF3FA}.search-panel label{display:block;margin-bottom:8px}.search-panel input{width:100%;border:1px solid #9aa8bb;border-radius:9px;background:white;padding:12px}.search-results{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:4px}.modal-open{overflow:hidden}.app-art img{max-height:340px!important;max-width:210px!important}.app-art{max-width:250px;margin:auto}.app-art.image-fallback{min-height:210px}.short-line{height:1px;background:#E2E8F1;margin:20px 0}@media(max-width:1024px){.wrap{padding-inline:22px}.primary{gap:12px}.primary a:nth-child(n+3){display:none}.ribbon-inner>div{gap:12px}}@media(max-width:768px){.wrap{padding-inline:16px}.header-row{min-height:60px;gap:12px}.primary,.service-link,.ribbon{display:none}.header-actions{margin-left:auto;gap:8px}.menu-button{display:inline-block}.brand-en{display:none}main{padding-top:24px;padding-bottom:46px}.section{margin-top:36px}.hero,.split,.duo,.feature,.editorial,.article-lead{grid-template-columns:minmax(0,1fr)}.hero{gap:14px}.hero-media img{max-height:208px}.hero-media.image-fallback{min-height:145px}.feature{gap:14px}.cards{grid-template-columns:repeat(2,minmax(0,1fr))}.duo>.card{display:block}.three-notes,.footer-bits{grid-template-columns:1fr}.section-head{display:block}.article-lead{gap:12px}.layout-b .article-body section{display:block;width:auto;margin-right:0}.layout-c .article-shell{grid-template-columns:minmax(0,1fr)}.toc{display:flex;flex-wrap:wrap;gap:10px;padding:10px}.toc a{padding:4px}.footer-grid{grid-template-columns:repeat(2,minmax(0,1fr))}.mobile-tail{display:flex;flex-wrap:wrap;gap:22px;margin-top:25px;padding-top:14px;border-top:1px solid #52617a}.panel{padding:16px}.menu-groups{gap:14px}}@media(max-width:480px){h1{font-size:28px}h2{font-size:22px}.cards,.menu-groups,.search-results{grid-template-columns:1fr}.menu-groups section{grid-template-columns:1fr 1fr}.card{padding:17px}.feature{padding:16px}.footer-grid{gap:16px}.footer-grid a{font-size:13px}.hero-media img{max-height:200px}.article-lead .image-box img{max-height:200px}}@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}*,*:before,*:after{animation:none!important;transition:none!important}}