*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;color:#252B3A;background:#fff;font-family:Arial,"PingFang SC","Microsoft YaHei",sans-serif;font-size:16px;line-height:1.78}a{color:#315CFF;text-decoration:none}a:hover{text-decoration:underline}button{font:inherit;cursor:pointer}img{display:block;max-width:100%;height:auto}.container{max-width:1160px;padding:0 24px;margin:0 auto}.topbar{position:sticky;top:0;z-index:1000;background:rgba(255,255,255,.96);border-bottom:1px solid #e8edf9;backdrop-filter:blur(9px)}.topinner{height:70px;display:flex;align-items:center;gap:26px}.brand{display:inline-flex;gap:9px;align-items:center;flex:none;color:#17213A;font-weight:800;font-size:20px;white-space:nowrap}.brandmark img{max-height:36px;max-width:140px;object-fit:contain}.brandmark .media-placeholder{width:37px;height:32px}.brandtext{white-space:nowrap}.mainnav{display:flex;align-items:center;gap:27px;flex:1;justify-content:center;min-width:0}.mainnav a{font-size:14px;color:#252B3A;white-space:nowrap;padding:22px 0;border-bottom:2px solid transparent}.mainnav a:hover,.mainnav a.active{color:#315CFF;border-color:#315CFF;text-decoration:none}.main-btn{display:inline-flex;justify-content:center;align-items:center;flex:none;background:#315CFF;color:#fff;height:40px;min-width:80px;padding:0 18px;border-radius:999px;font-size:14px;font-weight:700}.main-btn:hover{background:#2449d5;color:#fff;text-decoration:none}.channel-strip{background:#F5F7FB;border-bottom:1px solid #edf0f5}.strip-inner{height:44px;display:flex;align-items:center;gap:0;overflow-x:auto;scrollbar-width:thin;white-space:nowrap}.strip-inner a{flex:none;padding:0 18px;color:#5F6B82;font-size:13px;line-height:1.3;border-right:1px solid #dfe5f0}.strip-inner a:first-child{padding-left:0}.strip-inner a.active,.strip-inner a:hover{color:#315CFF}.menu-toggle{display:none;background:none;border:0;font-size:23px;color:#17213A;padding:5px}.mobile-drawer,.drawer-mask{display:none}.mobile-bottom{display:none}.site-footer{background:#101828;color:#D8E0F2;margin-top:52px}.footer-grid{padding-top:43px;padding-bottom:32px;display:grid;grid-template-columns:1.5fr repeat(3,1fr);gap:30px}.footer-grid h2{font-size:16px;color:#fff;margin:0 0 16px}.footer-grid a:not(.footer-logo){display:block;color:#d8e0f2;font-size:14px;margin:5px 0}.footer-grid p{font-size:14px;line-height:1.9}.footer-logo{display:flex;align-items:center;gap:12px;color:#fff;font-size:20px}.footer-logo img{max-height:38px;max-width:130px;object-fit:contain}.footnote{display:flex;gap:20px;justify-content:space-between;border-top:1px solid #344058;padding-top:15px;padding-bottom:23px;font-size:12px}.footnote p{margin:0}.to-top{position:fixed;right:20px;bottom:20px;background:#315CFF;color:#fff;border:0;border-radius:50%;width:40px;height:40px;z-index:100;opacity:0;pointer-events:none;transition:opacity .2s}.to-top.visible{opacity:1;pointer-events:auto}.eyebrow{color:#315CFF;font-size:12px;font-weight:800;letter-spacing:1.6px;margin:0 0 10px}.section{margin-top:44px}.section h2,.related-section h2{font-size:25px;line-height:1.35;color:#17213A;margin:0 0 16px}.section h3{color:#17213A;font-size:18px;line-height:1.4;margin:14px 0 6px}.section-heading{margin-bottom:22px;display:flex;justify-content:space-between;align-items:baseline;gap:20px;border-bottom:1px solid #e6ebf4}.section-heading h2{margin:0 0 12px}.section-heading p{margin:0 0 12px;font-size:14px;color:#5F6B82}.home{padding-top:22px}.hero-slider{position:relative;height:300px;background:#EEF4FF;border-radius:14px;overflow:hidden}.slide-stage,.slide{height:100%;width:100%}.slide[hidden]{display:none}.slide{display:flex;align-items:center;justify-content:center}.slide img{max-width:100%;max-height:100%;width:auto;height:auto;object-fit:contain;margin:auto}.slider-empty{height:100%;background:#EEF4FF}.slider-prev,.slider-next{position:absolute;top:50%;transform:translateY(-50%);border:0;background:#17213ab0;color:white;border-radius:50%;width:34px;height:34px;font-size:25px;line-height:1}.slider-prev{left:14px}.slider-next{right:14px}.slider-dots{position:absolute;bottom:11px;left:0;right:0;display:flex;justify-content:center;gap:9px}.slider-dots button{width:9px;height:9px;border:0;border-radius:50%;padding:0;background:#8298df}.slider-dots button[aria-current=true]{background:#315CFF;width:22px;border-radius:7px}.intro-section{display:grid;grid-template-columns:3fr 2fr;gap:45px;align-items:center;padding:34px 0 4px}.intro-section h1{color:#17213A;font-size:36px;line-height:1.35;margin:0 0 16px}.intro-section p{margin-top:0}.intro-links{background:#F5F7FB;border:1px solid #e6ecfc;border-radius:14px;padding:21px 25px}.intro-links strong{display:block;color:#17213A;margin-bottom:10px}.intro-links a{display:flex;justify-content:space-between;padding:8px 0;border-bottom:1px solid #e1e7f1}.intro-links a:last-child{border:0}.six-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:16px}.six-grid a{padding:20px 21px;border-radius:12px;background:#fff;border:1px solid #e4eafb;color:#17213A;display:flex;flex-direction:column;min-height:150px}.six-grid strong{font-size:19px}.six-grid span{font-size:14px;color:#5F6B82;margin:7px 0;flex:1}.six-grid em{font-style:normal;font-size:13px;color:#315CFF}.six-grid a:hover,.related-card:hover{background:#EEF4FF;text-decoration:none}.split-feature{display:grid;grid-template-columns:1.25fr 1fr;gap:32px;align-items:center;background:#f7f9fd;padding:26px;border-radius:14px}.split-feature.reverse .feature-copy{order:2}.split-feature.reverse .media{order:1}.feature-copy p{margin:0 0 18px}.text-links{display:flex;flex-direction:column;gap:4px;font-size:14px}.media{display:flex;align-items:center;justify-content:center;max-width:100%;min-width:0;overflow:hidden;border-radius:12px;background:#EEF4FF;aspect-ratio:16 / 9}.media img{width:auto;height:auto;max-width:100%;max-height:100%;object-fit:contain;object-position:center}.media-natural{aspect-ratio:auto;min-height:150px}.media-natural img{max-height:270px;max-width:100%;width:auto;height:auto;object-fit:contain}.media-device{aspect-ratio:9 / 12;max-width:300px;justify-self:center}.media-device img{max-height:100%;max-width:100%}.media-placeholder{height:100%;width:100%;min-height:110px;background:#EEF4FF}.visual-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:19px}.visual-item{min-width:0}.visual-item .media{height:165px;aspect-ratio:auto}.visual-item p{font-size:14px;color:#5F6B82;margin:6px 0 10px}.visual-item a{font-size:14px}.dual-text{display:grid;grid-template-columns:1.2fr 1fr;gap:34px;padding:26px 0;border-top:1px solid #e6ebf4;border-bottom:1px solid #e6ebf4}.dual-text.soft{border:0;background:#EEF4FF;border-radius:14px;padding:28px}.dual-text p{margin:0 0 15px}.topic-list{display:flex;flex-direction:column;justify-content:center;gap:10px}.topic-list a{padding:12px 18px;background:#f5f7fb;border-radius:9px}.numbered-list{display:grid;grid-template-columns:1fr 1fr;column-gap:30px}.numbered-list a{display:flex;align-items:center;gap:18px;color:#252B3A;padding:15px 3px;border-bottom:1px solid #e4eaf4}.numbered-list b{color:#6B8DFF}.numbered-list span{flex:1}.numbered-list em{font-size:13px;color:#315CFF;font-style:normal}.two-visual{display:grid;grid-template-columns:1fr 1fr;gap:22px}.two-visual .media{height:205px;aspect-ratio:auto}.two-visual p{font-size:14px;margin:4px 0;color:#5F6B82}.knowledge-panel{background:#EEF4FF;padding:26px;border-radius:12px}.knowledge-panel strong{font-size:20px;color:#17213A}.three-help{display:grid;grid-template-columns:repeat(3,1fr);gap:18px}.three-help a{background:#F5F7FB;border-radius:12px;padding:20px;color:#17213A}.three-help strong{font-size:18px}.three-help p{font-size:14px;color:#5F6B82;margin-bottom:0}.about-feature{display:grid;grid-template-columns:1fr 1fr;gap:30px;align-items:center}.responsibility{background:#EEF4FF;border-radius:12px;padding:28px}.responsibility p{margin:0 0 10px}.page-shell{padding-top:27px}.breadcrumbs{font-size:13px;color:#8A95AA;margin-bottom:20px}.breadcrumbs a{color:#5F6B82}.page-header{max-width:850px;margin-bottom:30px}.page-header h1{font-size:32px;line-height:1.38;color:#17213A;margin:0 0 15px}.lead{font-size:17px;color:#5F6B82;line-height:1.85}.page-feature{max-width:820px;margin-bottom:30px}.page-feature .media{height:260px}.small-note{color:#8A95AA;font-size:12px}.reading-layout{display:grid;grid-template-columns:minmax(0,800px) minmax(220px,1fr);gap:45px;align-items:start}.article-body{min-width:0}.reading-section{margin-bottom:32px}.reading-section h2{font-size:23px;line-height:1.4;color:#17213A;margin:0 0 15px}.reading-section p{line-height:1.82;margin:0 0 16px}.reading-aside{position:sticky;top:95px;padding:22px;border:1px solid #e4eafb;border-radius:12px;background:#f8faff}.reading-aside h2{font-size:19px;color:#17213A;margin:0 0 10px}.reading-aside p{font-size:14px;color:#5F6B82}.reading-aside ul{list-style:none;padding:0;margin:15px 0}.reading-aside li{padding:9px 0;border-bottom:1px solid #e5ebf7}.aside-tip{margin-top:20px;border-top:1px solid #e2e7f2;padding-top:17px;font-size:14px}.related-section{margin-top:25px}.related-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:16px}.related-card{border:1px solid #e3eafa;border-radius:12px;padding:18px;color:#17213A}.related-card strong,.related-card span{display:block}.related-card span{font-size:13px;color:#5F6B82;margin-top:8px}.drawer-brand img{max-width:95px;max-height:30px}
@media(max-width:1080px){.mainnav{gap:15px}.topinner{gap:15px}.brandtext{font-size:17px}.reading-layout{gap:25px}}
@media(max-width:980px){.container{padding-left:20px;padding-right:20px}.topinner{height:58px;justify-content:space-between}.mainnav{display:none}.brand{margin:auto}.brandmark img{max-height:29px;max-width:110px}.brandtext{font-size:17px}.main-btn{height:36px;padding:0 14px;min-width:65px}.menu-toggle{display:block}.mobile-drawer{display:block;position:fixed;inset:0 auto 0 0;width:min(84vw,320px);height:100dvh;overflow-y:auto;background:#fff;z-index:12000;transform:translateX(-105%);visibility:hidden;pointer-events:none;transition:transform .2s ease,visibility .2s}.mobile-drawer.is-open{transform:translateX(0);visibility:visible;pointer-events:auto}.drawer-mask{display:block;position:fixed;inset:0;background:rgba(16,24,40,.42);z-index:11000;opacity:0;visibility:hidden;pointer-events:none;transition:opacity .2s ease,visibility .2s}.drawer-mask.is-visible{opacity:1;visibility:visible;pointer-events:auto}body.drawer-open{overflow:hidden}.drawer-top{display:flex;align-items:center;justify-content:space-between;gap:12px;padding:14px 18px;border-bottom:1px solid #e5ecf6}.drawer-brand{display:flex;align-items:center;gap:8px;color:#17213A;font-weight:800}.drawer-close{background:#EEF4FF;color:#17213A;border:0;border-radius:7px;padding:4px 10px}.drawer-group{padding:12px 18px;border-bottom:1px solid #edf1fa}.drawer-group h2{color:#5F6B82;font-size:13px;margin:0 0 5px}.drawer-group a{display:block;color:#252B3A;padding:6px 2px;min-height:40px;font-size:15px}.mobile-bottom{position:fixed;bottom:0;left:0;right:0;z-index:900;display:flex;justify-content:space-around;align-items:center;height:60px;background:#fff;border-top:1px solid #e2e9f5}.mobile-bottom a{color:#5F6B82;font-size:14px;flex:1;text-align:center;padding:14px 0}.mobile-bottom a.active{color:#315CFF;font-weight:700}body{padding-bottom:60px}.site-footer{margin-bottom:0}.to-top{bottom:75px}.reading-layout{grid-template-columns:minmax(0,1fr)}.reading-aside{position:static}.footer-grid{grid-template-columns:repeat(2,1fr)}}
@media(max-width:768px){.container{padding-left:16px;padding-right:16px}.hero-slider{height:190px}.intro-section{grid-template-columns:1fr;gap:20px}.intro-section h1{font-size:28px}.six-grid{grid-template-columns:repeat(2,minmax(0,1fr))}.split-feature,.about-feature{grid-template-columns:1fr}.split-feature.reverse .feature-copy{order:1}.split-feature.reverse .media{order:2}.visual-grid{grid-template-columns:repeat(2,minmax(0,1fr))}.dual-text{grid-template-columns:1fr;gap:13px}.numbered-list{grid-template-columns:1fr}.three-help{grid-template-columns:1fr}.related-grid{grid-template-columns:1fr}.section-heading{display:block}.section{margin-top:30px}.section h2{font-size:22px}.page-header h1{font-size:27px}.article-body h2{font-size:21px}.page-feature .media{height:auto;min-height:140px;max-height:250px}.footnote{display:block}.footnote p{margin-bottom:6px}.mobile-feature .media{order:-1}.media-device{max-width:220px}.two-visual .media{height:140px}}
@media(max-width:430px){.brandtext{font-size:16px}.topinner{gap:5px}.brandmark img{max-width:86px}.intro-section h1{font-size:26px}.hero-slider{height:170px}.six-grid a{padding:15px 12px;min-height:145px}.six-grid strong{font-size:16px}.visual-item .media{height:120px}.visual-item h3{font-size:16px}.footer-grid{gap:18px}.split-feature{padding:17px}.two-visual{grid-template-columns:1fr}.two-visual .media{height:155px}}
@media(max-width:350px){.brandtext{display:none}.hero-slider{height:145px}.visual-grid{grid-template-columns:1fr}.visual-item .media{height:165px}}
@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}*,*:before,*:after{transition:none!important;animation:none!important}}
