*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;background:#eaf2fb;color:#24364f;font:16px/1.8 Arial,"PingFang SC","Microsoft YaHei",sans-serif}button{font:inherit}a{color:#137cd8;text-decoration:none}a:hover{text-decoration:underline}img{max-width:100%}h1,h2,h3,p{margin-top:0}h1,h2,h3{line-height:1.35}h1{font-size:34px;color:#142f4d}h2{font-size:24px;color:#163b61}h3{font-size:19px;color:#193f65}.container{width:min(1160px,calc(100% - 48px));margin-inline:auto;min-width:0}.site-header{position:sticky;top:0;z-index:1000;background:#fff;box-shadow:0 2px 10px #10314a10}.topbar{height:70px;display:flex;align-items:center;gap:28px}.brand{display:flex;align-items:center;gap:10px;flex:none;color:#137cd8;font-size:20px;font-weight:800;white-space:nowrap}.logo-media{display:flex;justify-content:center;align-items:center;width:38px;height:38px;overflow:hidden;border-radius:7px;background:#edf5ff}.logo-media img{max-width:100%;max-height:100%;width:auto;height:auto;object-fit:contain}.logo-media .media-placeholder{width:80%;height:80%;background:#cae5fb;border-radius:4px}.desktop-nav{display:flex;align-items:center;gap:24px;flex:1;justify-content:center;white-space:nowrap}.nav-link{position:relative;color:#24364f;font-size:14px;line-height:70px}.nav-link.is-current,.sub-link.is-current{color:#137cd8}.nav-link.is-current:after{position:absolute;content:"";height:2px;bottom:0;left:0;right:0;background:#137cd8}.btn-register,.button{border-radius:999px;background:#137cd8;color:#fff;font-weight:700;padding:9px 21px;white-space:nowrap;display:inline-flex;justify-content:center;align-items:center;min-height:42px}.btn-register:hover,.button:hover{color:#fff;background:#096ab9;text-decoration:none}.subbar{background:#f7fbff;border-top:1px solid #e9f2f9}.subbar-inner{display:flex;align-items:center;overflow-x:auto;white-space:nowrap;scrollbar-width:thin;gap:0;height:44px}.sub-link{color:#5d718a;font-size:13px;padding:0 16px;border-right:1px solid #e0eaf3}.sub-link:first-child{padding-left:0}.sub-link:last-child{border:0}.main-content{padding-top:28px;padding-bottom:55px}.card{background:#fff;border:1px solid rgba(47,168,247,.14);border-radius:12px;box-shadow:0 6px 22px #14517a08}.section{margin-top:42px}.section-heading{display:flex;align-items:baseline;justify-content:space-between;gap:15px;margin-bottom:18px}.section-heading h2{margin:0}.section-heading p{color:#5d718a;margin:0;font-size:14px}.eyebrow,.article-kicker,.entry-label{font-size:12px;letter-spacing:1.5px;font-weight:700;color:#137cd8;text-transform:uppercase}.hero{display:grid;grid-template-columns:54% 46%;align-items:center;padding:26px;gap:0;min-width:0}.hero-copy{padding:12px 25px 12px 5px}.hero h1{font-size:36px;line-height:1.35;margin-bottom:16px}.hero p:not(.eyebrow){color:#5d718a}.hero-links{display:flex;align-items:center;gap:17px;flex-wrap:wrap;margin-top:22px}.hero-visual{min-width:0}.media{display:flex;align-items:center;justify-content:center;width:100%;max-width:100%;min-width:0;overflow:hidden;border-radius:12px;background:#edf5ff}.media img{display:block;width:auto;height:auto;max-width:100%;max-height:100%;object-fit:contain;object-position:center}.media-placeholder{width:100%;height:100%;background:linear-gradient(130deg,#e4f2fe,#f2f9ff);min-height:60px}.media-wide{aspect-ratio:16/9}.media-banner{aspect-ratio:16/7}.media-square{aspect-ratio:1/1}.media-portrait{aspect-ratio:3/4}.media-device{aspect-ratio:9/16;max-height:340px}.hero .media{max-height:290px}.hero .media img{max-height:290px}.category-grid,.three-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:18px}.category-card{padding:23px}.category-card p,.article-teaser p,.feature-main p,.stack-list p{color:#52667e}.category-card a,.article-teaser a{font-weight:700}.feature-split{display:grid;grid-template-columns:1.55fr 1fr;gap:18px}.feature-main,.stack-list,.article-teaser,.wide-article{padding:25px}.stack-list p{padding:10px 0;border-bottom:1px solid #e9f1f8}.stack-list p:last-child{border:0}.duo-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:18px}.visual-grid{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:16px}.visual-item{margin:0;overflow:hidden;padding:10px}.visual-item figcaption{padding:10px 3px 3px;font-size:13px;color:#5d718a}.numbered-list{padding:12px 24px}.numbered-row{display:flex;gap:20px;padding:18px 0;border-bottom:1px solid #e7eef8}.numbered-row:last-child{border:0}.numbered-row>span{color:#137cd8;font-size:24px;font-weight:800}.numbered-row h3{margin-bottom:5px}.numbered-row p{margin-bottom:5px;color:#5d718a}.brand-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:16px}.brand-tile{padding:12px;min-width:0;text-align:center}.brand-tile .media{height:120px;aspect-ratio:auto}.brand-tile .media-placeholder{min-height:0}.brand-tile h3{font-size:16px;margin:10px 0 3px}.brand-tile p{font-size:13px;color:#5d718a;margin:0 0 6px}.brand-noimage{height:120px;background:#edf5ff;border-radius:8px}.section-link{text-align:right;margin-top:15px}.mobile-feature,.device-feature{display:grid;grid-template-columns:1fr 260px;align-items:center;gap:34px;padding:27px}.mobile-feature .media,.device-feature .media{max-height:310px;justify-self:center}.responsible-note{padding:24px}.responsible-note p{color:#52667e}.page-intro{padding:30px 35px;background:#fff;border-radius:12px;border:1px solid #dfeefb;margin-bottom:22px}.page-intro h1{margin-bottom:12px}.lead{font-size:17px;color:#5d718a;margin:0}.reading-layout{display:grid;grid-template-columns:minmax(0,1fr) 280px;gap:22px;align-items:start}.article{padding:29px 34px}.article section+section{border-top:1px solid #eaf1f8;margin-top:25px;padding-top:24px}.article h2{font-size:23px}.article p{line-height:1.85;margin-bottom:16px}.sidebar{display:grid;gap:18px}.side-card{padding:21px}.side-card h2{font-size:18px}.side-card p{font-size:14px;color:#5d718a}.side-links{display:grid;gap:10px}.related{margin-top:32px}.link-chips{display:flex;flex-wrap:wrap;gap:12px}.link-chips a{padding:9px 16px;background:#fff;border:1px solid #d7e9f8;border-radius:999px}.news-feed{display:grid;gap:17px;max-width:900px}.news-entry{padding:25px 30px}.news-entry h2{font-size:22px;margin-top:7px}.news-entry p{margin-bottom:9px}.entry-more{text-align:right}.gallery-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:17px}.faq-list details{padding:18px 23px;margin-bottom:12px}.faq-list summary{font-weight:700;cursor:pointer;color:#17436a}.faq-list p{margin:10px 0 0}.small-visual{padding:20px;max-width:720px}.small-visual .media{max-height:250px}.small-visual p{margin:14px 0 0}.site-footer{background:#102b46;color:#eaf6ff}.footer-grid{display:grid;grid-template-columns:1.5fr repeat(3,1fr);gap:35px;padding-top:45px;padding-bottom:35px}.footer-grid h2{font-size:17px;color:#fff}.footer-grid p{font-size:14px;color:#c4d9e9}.footer-grid a{display:block;color:#d4e8f5;font-size:14px;margin-bottom:8px}.footer-logo{display:flex!important;align-items:center;gap:10px;font-size:18px!important}.footer-bottom{border-top:1px solid #ffffff29;padding:18px 0 25px;display:flex;justify-content:space-between;gap:20px;font-size:12px;color:#bed2e0}.mobile-bottom,.menu-toggle,.mobile-drawer,.drawer-mask{display:none}.back-top{position:fixed;bottom:22px;right:23px;border:0;border-radius:50%;width:40px;height:40px;color:#fff;background:#137cd8;cursor:pointer;box-shadow:0 3px 12px #0002}
@media(max-width:1100px){.desktop-nav{gap:15px}.topbar{gap:15px}.nav-link{font-size:13px}.container{width:calc(100% - 40px)}}
@media(max-width:980px){.desktop-nav{display:none}.topbar{height:58px;justify-content:space-between}.brand{margin-inline:auto;font-size:18px}.brand .logo-media{height:30px;width:30px}.btn-register{min-height:36px;padding:6px 15px;font-size:13px}.menu-toggle{display:flex;flex-direction:column;justify-content:center;gap:5px;align-items:center;width:40px;height:40px;border:0;background:transparent;flex:none;cursor:pointer}.menu-toggle span{height:2px;width:21px;background:#24364f;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(16,43,70,.38);z-index:11000;opacity:0;visibility:hidden;pointer-events:none;transition:opacity .18s ease,visibility .18s}.drawer-mask.is-visible{opacity:1;visibility:visible;pointer-events:auto}body.drawer-open{overflow:hidden}.drawer-head{position:sticky;top:0;background:#f7fbff;display:flex;align-items:center;justify-content:space-between;padding:14px 17px;z-index:1}.drawer-close{border:0;background:transparent;font-size:27px;color:#24364f;cursor:pointer}.drawer-group{padding:13px 16px;border-bottom:1px solid #e6eff8}.drawer-group h3{font-size:13px;color:#5d718a;margin:0 0 6px}.drawer-group a{display:block;min-height:42px;padding:8px 9px;color:#24364f;font-size:15px}.drawer-group a.is-current{color:#137cd8;font-weight:700;background:#edf6ff;border-radius:7px}.mobile-bottom{position:fixed;display:grid;grid-template-columns:repeat(4,1fr);align-items:center;bottom:0;left:0;right:0;z-index:1000;background:#fff;border-top:1px solid #dceaf4;height:60px;padding-bottom:env(safe-area-inset-bottom)}.mobile-bottom a{text-align:center;color:#5d718a;font-size:14px;font-weight:700}.mobile-bottom a.is-current{color:#137cd8}.main-content{padding-bottom:90px}.footer-bottom{padding-bottom:80px}.back-top{bottom:75px}.reading-layout{grid-template-columns:minmax(0,1fr) 220px}}
@media(max-width:768px){.container{width:calc(100% - 32px)}.hero{grid-template-columns:1fr;padding:19px}.hero-visual{order:-1}.hero-copy{padding:16px 0 2px}.hero h1{font-size:28px}.hero .media{max-height:195px}.hero .media img{max-height:195px}.category-grid,.three-grid,.brand-grid{grid-template-columns:repeat(2,minmax(0,1fr))}.feature-split,.duo-grid,.reading-layout,.mobile-feature,.device-feature{grid-template-columns:1fr}.visual-grid{grid-template-columns:repeat(2,minmax(0,1fr))}.mobile-feature .media,.device-feature .media{order:-1;max-width:210px}.section{margin-top:29px}.section-heading{display:block}.section-heading p{margin-top:5px}.page-intro{padding:23px}.page-intro h1{font-size:27px}.article{padding:22px}.sidebar{grid-template-columns:repeat(2,minmax(0,1fr))}.footer-grid{grid-template-columns:repeat(2,minmax(0,1fr));gap:25px}.footer-bottom{display:block}.footer-bottom span{display:block;margin-bottom:7px}.gallery-grid{grid-template-columns:1fr}}
@media(max-width:430px){body{font-size:15px}.brand{font-size:16px;gap:6px}.topbar{gap:3px}.hero h1{font-size:26px}.category-card{padding:15px}.category-card h3{font-size:17px}.category-grid{gap:10px}.visual-grid{gap:9px}.visual-item{padding:6px}.visual-item figcaption{font-size:12px}.brand-grid{gap:10px}.brand-tile .media,.brand-noimage{height:96px}.sidebar{grid-template-columns:1fr}.hero-links{gap:12px}.hero-links a{font-size:13px}.numbered-list{padding:8px 14px}.numbered-row{gap:12px}.feature-main,.stack-list,.article-teaser,.wide-article{padding:19px}.footer-grid{gap:15px}.footer-grid h2{font-size:15px}}
@media(max-width:340px){.brand{font-size:14px}.btn-register{padding-inline:10px;font-size:12px}.container{width:calc(100% - 28px)}.category-grid{grid-template-columns:1fr}.category-card{padding:16px}}
