*,*::before,*::after{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;background:#eaf2fb;color:#24364f;font-family:Arial,"PingFang SC","Microsoft YaHei",sans-serif;font-size:16px;line-height:1.8}a{color:#137cd8;text-decoration:none}a:hover{text-decoration:underline}img{max-width:100%}button{font:inherit;cursor:pointer}.wrap{max-width:1160px;margin:0 auto;padding-left:24px;padding-right:24px}.site-header{position:sticky;top:0;z-index:1000;background:#fff;box-shadow:0 2px 16px rgba(16,43,70,.06)}.topbar{display:flex;align-items:center;height:70px;gap:28px;min-width:0}.brand{display:flex;align-items:center;gap:8px;flex-shrink:0;color:#137cd8;text-decoration:none}.brand .media-logo{height:38px;max-width:58px}.brand-words{white-space:nowrap;line-height:1.15;display:flex;flex-direction:column}.brand-words strong{font-size:19px}.brand-words small{font-size:9px;letter-spacing:.6px;color:#5d718a}.desktop-nav{display:flex;align-items:center;gap:24px;min-width:0;white-space:nowrap;margin-left:auto}.desktop-nav a{height:70px;display:flex;align-items:center;font-size:14px;color:#24364f;border-bottom:2px solid transparent}.desktop-nav a.is-active,.desktop-nav a:hover{color:#137cd8;border-color:#137cd8;text-decoration:none}.register-btn{flex-shrink:0;background:#137cd8;color:#fff;border-radius:999px;padding:8px 18px;font-size:14px;line-height:24px;font-weight:bold}.register-btn:hover{background:#0962b3;color:#fff;text-decoration:none}.subnav{background:#f7fbff;border-top:1px solid rgba(47,168,247,.10)}.subnav-inner{display:flex;align-items:center;gap:0;overflow-x:auto;scrollbar-width:none;white-space:nowrap;height:44px}.subnav-inner::-webkit-scrollbar{display:none}.subnav a{color:#5d718a;padding:0 17px;font-size:13px;line-height:1.2;border-right:1px solid #dbe8f4;flex-shrink:0}.subnav a:first-child{padding-left:0}.subnav a:last-child{border:0}.subnav a.is-active,.subnav a:hover{color:#137cd8}.menu-toggle{display:none;border:0;background:none;padding:8px;width:38px;flex-shrink:0}.menu-toggle span{display:block;height:2px;background:#24364f;margin:5px 0}.main{padding-top:30px;padding-bottom:52px;min-height:60vh}.panel,.article,.topic-card,.story-row,.side-box,.brand-card,.figure-card{background:#fff;border:1px solid rgba(47,168,247,.14);border-radius:12px;box-shadow:0 2px 15px rgba(16,43,70,.035)}.panel{padding:26px}.hero{display:grid;grid-template-columns:54fr 46fr;align-items:center;gap:28px;padding:28px}.hero-copy h1{font-size:36px;line-height:1.35;margin:4px 0 14px;color:#102b46;letter-spacing:-.5px}.hero-copy p{font-size:16px;color:#5d718a;max-width:600px}.eyebrow{color:#137cd8;font-weight:bold;font-size:13px;letter-spacing:1px}.hero-links{display:flex;gap:9px;flex-wrap:wrap;margin-top:18px}.hero-links a{border-radius:999px;background:#edf5ff;padding:7px 15px;font-size:14px;font-weight:bold}.hero-image{min-width:0}.section{margin-top:42px}.section-head{display:flex;align-items:baseline;justify-content:space-between;gap:14px;margin:0 0 17px}.section-head h2{font-size:24px;color:#102b46;line-height:1.4;margin:0}.section-head a{font-size:14px;white-space:nowrap}.grid{display:grid;gap:18px}.grid-3{grid-template-columns:repeat(3,minmax(0,1fr))}.grid-4{grid-template-columns:repeat(4,minmax(0,1fr))}.grid-2{grid-template-columns:repeat(2,minmax(0,1fr))}.topic-card{display:flex;flex-direction:column;padding:20px;gap:9px;color:#24364f;min-width:0;transition:transform .15s ease,box-shadow .15s ease}.topic-card:hover{text-decoration:none;transform:translateY(-2px);box-shadow:0 5px 22px rgba(16,43,70,.09)}.topic-name{font-weight:bold;color:#137cd8;font-size:18px}.topic-copy{color:#5d718a;font-size:14px;line-height:1.7;flex:1}.topic-more{font-size:13px;font-weight:bold;color:#137cd8}.prose p,.article p{line-height:1.84;margin:0 0 16px}.prose p:last-child,.article p:last-child{margin-bottom:0}.prose h3,.article h2{color:#102b46;margin:24px 0 12px}.prose h3{font-size:19px}.article h2{font-size:23px}.feature-split{display:grid;grid-template-columns:1.2fr 1fr;gap:20px}.feature-split>*{min-width:0}.reading-list{margin:0;padding:0;list-style:none}.reading-list li{padding:12px 0;border-bottom:1px solid #eaf2fb}.reading-list li:last-child{border:0}.reading-list a{font-weight:bold}.numbered{counter-reset:reading}.numbered li{display:flex;gap:13px;align-items:baseline}.numbered li:before{counter-increment:reading;content:counter(reading,decimal-leading-zero);color:#2fa8f7;font-weight:bold}.media{display:flex;justify-content:center;align-items: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-wide{aspect-ratio:16/9}.media-banner{aspect-ratio:16/7}.media-square{aspect-ratio:1}.media-portrait{aspect-ratio:3/4}.media-device{aspect-ratio:9/16;max-height:340px}.media-natural img{width:100%;height:auto;max-height:280px}.media-logo{height:125px;max-width:100%;background:transparent}.media-logo img{max-height:100%;max-width:100%}.hero-image .media{max-height:300px}.figure-card{padding:12px;min-width:0}.figure-card .media{max-height:210px}.figure-card p{margin:12px 3px 3px;font-size:14px;line-height:1.7;color:#5d718a}.brand-card{padding:15px;text-align:center;min-width:0}.brand-card .media{height:115px;aspect-ratio:auto}.brand-card h3{font-size:16px;margin:8px 0 4px}.brand-card p{font-size:12px;color:#5d718a;line-height:1.5;margin:0}.inner-hero{padding:30px}.inner-hero h1{font-size:32px;line-height:1.45;color:#102b46;margin:7px 0 12px}.inner-hero p{color:#5d718a;margin:0;max-width:780px}.breadcrumb{color:#5d718a;font-size:13px;margin-bottom:8px}.content-layout{display:grid;grid-template-columns:minmax(0,780px) minmax(0,1fr);gap:20px;align-items:start;margin-top:20px}.article{padding:32px}.article h2:first-child{margin-top:0}.aside-stack{display:grid;gap:18px}.side-box{padding:21px}.side-box h2{margin:0 0 14px;font-size:18px;color:#102b46}.side-box a{display:block;padding:8px 0;border-bottom:1px solid #eaf2fb;font-size:14px}.side-box a:last-child{border:0}.note{background:#f7fbff;border-left:3px solid #2fa8f7;padding:15px 18px;border-radius:5px;margin:20px 0;color:#46627f}.page-more{margin-top:24px}.page-more h2{font-size:21px}.site-footer{background:#102b46;color:#eaf6ff;padding-top:34px}.footer-grid{display:grid;grid-template-columns:1.4fr repeat(3,1fr);gap:28px}.footer-grid h2{font-size:16px;color:#fff;margin:0 0 11px}.footer-grid a:not(.footer-brand){display:block;font-size:14px;color:#d0e2f2;margin:6px 0}.footer-grid p{color:#c4d8ec;font-size:14px}.footer-brand{display:flex;align-items:center;gap:10px;color:#fff;font-size:19px}.footer-brand .media{width:50px;height:42px}.footer-bottom{border-top:1px solid rgba(234,246,255,.15);margin-top:25px;padding-top:16px;padding-bottom:20px;font-size:13px;color:#c4d8ec}.footer-bottom p{margin:3px 0}.mobile-bottom{display:none}.back-top{position:fixed;right:24px;bottom:24px;width:42px;height:42px;border-radius:50%;border:0;background:#137cd8;color:white;box-shadow:0 3px 12px #137cd844;opacity:0;pointer-events:none;transition:.2s;z-index:100}.back-top.visible{opacity:1;pointer-events:auto}.drawer-mask,.mobile-drawer{display:none}.visual-row{display:grid;grid-template-columns:minmax(0,1fr) 250px;align-items:center;gap:25px}.visual-row .media-device{max-width:240px;margin:auto}.simple-links{display:flex;flex-wrap:wrap;gap:10px;margin-top:16px}.simple-links a{display:inline-block;padding:6px 12px;background:#edf5ff;border-radius:30px;font-size:14px}.qa{border-bottom:1px solid #e6f0f9;padding:15px 0}.qa h3{margin:0 0 8px;font-size:17px;color:#137cd8}.qa p{margin:0}.muted{color:#5d718a}
@media(max-width:1100px){.topbar{gap:16px}.desktop-nav{gap:14px}.brand-words strong{font-size:17px}.desktop-nav a{font-size:13px}}
@media(max-width:980px){.wrap{padding-left:20px;padding-right:20px}.topbar{height:58px;gap:9px;justify-content:space-between}.desktop-nav{display:none}.menu-toggle{display:block}.brand{margin-right:auto;margin-left:0}.brand .media-logo{height:29px;max-width:42px}.brand-words strong{font-size:17px}.brand-words small{font-size:8px}.register-btn{height:36px;line-height:20px;padding:8px 12px;font-size:12px}.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-heading{display:flex;align-items:center;justify-content:space-between;padding:14px 20px;border-bottom:1px solid #e6f0f9}.drawer-title{font-weight:bold;font-size:18px}.drawer-title small{display:block;font-size:9px;color:#5d718a}.drawer-close{border:0;background:#edf5ff;border-radius:50%;width:36px;height:36px;font-size:24px}.drawer-section{padding:14px 20px;border-bottom:1px solid #edf5ff}.drawer-section h2{font-size:13px;color:#5d718a;margin:0 0 7px}.drawer-section a{display:block;padding:9px 10px;min-height:42px;border-radius:7px;color:#24364f;font-size:14px}.drawer-section a.is-active{background:#edf5ff;color:#137cd8}.mobile-bottom{position:fixed;bottom:0;left:0;right:0;z-index:1000;display:grid;grid-template-columns:repeat(4,minmax(0,1fr));background:#fff;border-top:1px solid #e1edf8;min-height:60px;padding-bottom:env(safe-area-inset-bottom)}.mobile-bottom a{display:flex;align-items:center;justify-content:center;font-size:14px;color:#5d718a}.mobile-bottom a.is-active{color:#137cd8;font-weight:bold}.main{padding-bottom:105px}.site-footer{padding-bottom:65px}.back-top{bottom:81px;right:16px}.content-layout{grid-template-columns:minmax(0,1fr)}.aside-stack{grid-template-columns:repeat(2,minmax(0,1fr))}.grid-4{grid-template-columns:repeat(2,minmax(0,1fr))}.grid-3{grid-template-columns:repeat(2,minmax(0,1fr))}.footer-grid{grid-template-columns:repeat(2,minmax(0,1fr))}}
@media(max-width:640px){.wrap{padding-left:16px;padding-right:16px}.main{padding-top:17px}.hero{display:flex;flex-direction:column;gap:15px;padding:18px}.hero-image{order:-1;width:100%}.hero-image .media{max-height:195px}.hero-copy h1{font-size:27px}.hero-copy p{font-size:15px}.section{margin-top:27px}.section-head h2{font-size:20px}.grid{gap:12px}.topic-card{padding:14px}.topic-name{font-size:16px}.topic-copy{font-size:13px}.feature-split,.visual-row{grid-template-columns:minmax(0,1fr)}.panel{padding:18px}.inner-hero{padding:20px}.inner-hero h1{font-size:26px}.article{padding:21px}.article h2{font-size:21px}.aside-stack{grid-template-columns:minmax(0,1fr)}.brand-card{padding:9px}.brand-card .media{height:95px}.figure-card .media{max-height:145px}.footer-grid{gap:17px}.footer-grid h2{font-size:14px}.footer-grid a:not(.footer-brand){font-size:13px}.visual-row .media-device{max-height:255px}.subnav a{padding:0 13px}.brand-words strong{font-size:16px}}
@media(max-width:360px){.brand-words small{display:none}.brand .media-logo{max-width:34px}.register-btn{padding:7px 10px}.grid-3,.grid-4{grid-template-columns:repeat(2,minmax(0,1fr))}.hero-copy h1{font-size:26px}.topic-card{padding:11px}.topic-copy{font-size:12px}}
@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}*,*:before,*:after{transition:none!important}}
