:root{--bg:#EAF2FB;--blue:#137CD8;--bright:#2FA8F7;--ink:#24364F;--muted:#5D718A;--light:#F7FBFF;--stroke:rgba(47,168,247,.14)}*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;background:var(--bg);color:var(--ink);font:16px/1.8 Arial,"PingFang SC","Microsoft YaHei",sans-serif}a{color:var(--blue);text-decoration:none}a:hover{text-decoration:underline}img{max-width:100%;height:auto}button{font:inherit;cursor:pointer}h1,h2,h3{line-height:1.36;letter-spacing:.01em}h1{font-size:clamp(26px,3vw,36px);margin:0 0 20px}h2{font-size:24px;margin:0 0 16px}h3{font-size:19px;margin:0 0 12px}p{margin:0 0 16px}.container{width:min(100% - 48px,1160px);margin:auto}.site-header{background:#fff;position:sticky;top:0;z-index:500;box-shadow:0 4px 18px #143e6810}.topbar{height:70px;display:flex;align-items:center;gap:23px}.brand{display:flex;flex:0 0 auto;align-items:center;color:#137CD8;font-weight:800;font-size:23px;white-space:nowrap}.brand img{display:block;max-width:165px;max-height:38px;object-fit:contain}.brand-text span{color:#24364F}.primary-nav{display:flex;gap:19px;align-items:center;justify-content:center;flex:1;min-width:0;white-space:nowrap;height:100%}.nav-link{color:var(--ink);font-size:14px;font-weight:600;height:100%;display:flex;align-items:center;border-bottom:2px solid transparent}.nav-link.is-current,.nav-link:hover{color:var(--blue);border-bottom-color:var(--blue);text-decoration:none}.register-btn,.pill-link{display:inline-flex;align-items:center;justify-content:center;min-height:42px;padding:0 18px;border-radius:999px;background:#137CD8;color:#fff!important;font-weight:700;font-size:14px;white-space:nowrap}.register-btn:hover,.pill-link:hover{background:#0962b3;text-decoration:none}.channel-bar{background:var(--light);border-top:1px solid 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.media{min-height:220px}.hero-links{display:flex;gap:10px;flex-wrap:wrap;margin-top:21px}.hero-links a{background:#eef7ff;border-radius:40px;padding:8px 14px;font-weight:700;font-size:13px}.hero-links a:hover{background:#daeeff;text-decoration:none}.section{margin-top:40px}.section-heading{display:flex;align-items:end;justify-content:space-between;gap:16px;margin-bottom:16px}.section-heading h2{margin:0}.section-heading>a{font-size:14px;font-weight:700}.grid{display:grid;gap:18px}.grid-2{grid-template-columns:repeat(2,minmax(0,1fr))}.grid-3{grid-template-columns:repeat(3,minmax(0,1fr))}.grid-4{grid-template-columns:repeat(4,minmax(0,1fr))}.tile{padding:22px;min-width:0}.tile h3{margin-top:0}.tile p,.news-item p{color:var(--muted);font-size:14px}.text-link{font-weight:700;font-size:14px}.article-layout{display:grid;grid-template-columns:minmax(0,790px) minmax(220px,1fr);gap:22px;align-items:start}.prose{padding:34px}.prose section+section{margin-top:32px;padding-top:24px;border-top:1px 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auto}.media-placeholder{width:100%;height:100%;min-height:115px;background:linear-gradient(125deg,#edf5ff,#e0efff)}.hero .media-banner{max-height:290px}.thumb-card{padding:12px}.thumb-card p{font-size:13px;color:var(--muted);margin:8px 3px 0}.thumb-card .media{max-height:190px}.brand-card{padding:14px;display:flex;align-items:center;gap:13px}.brand-card .media{width:98px;min-width:98px;height:98px;aspect-ratio:1}.brand-card h3{font-size:16px;margin:0 0 5px}.brand-card p{font-size:12px;margin:0;color:var(--muted)}.news-item{padding:20px;display:flex;gap:17px;align-items:flex-start}.news-number{color:var(--blue);font-size:23px;font-weight:800;line-height:1.2}.news-item h3{font-size:17px;margin:0 0 6px}.split{display:grid;grid-template-columns:1.2fr .8fr;gap:20px}.feature-article{padding:28px}.feature-article h3{font-size:21px}.feature-article p{color:var(--muted)}.tags{display:flex;gap:9px;flex-wrap:wrap;margin-top:12px}.tags a{background:#eff7fe;color:#137CD8;border-radius:20px;font-size:13px;padding:5px 11px}.app-split{display:grid;grid-template-columns:1fr 250px;gap:30px;align-items:center}.app-split .media{max-height:320px}.faq-list details{border-top:1px solid #e5eff9;padding:16px 0}.faq-list summary{cursor:pointer;font-weight:700;color:#24364F}.faq-list p{margin:12px 0 0}.site-footer{background:#102B46;color:#EAF6FF;padding-top:40px}.footer-grid{display:grid;grid-template-columns:1.5fr repeat(3,1fr);gap:38px}.footer-grid h3{font-size:16px;color:#fff}.footer-grid a{display:block;color:#d8eafa;font-size:14px;margin-bottom:8px}.footer-brand{font-size:21px!important;font-weight:800}.footer-brand small{display:block;font-size:10px;letter-spacing:.13em}.footer-grid p{font-size:13px;color:#c9dcec;margin-top:15px}.footer-bottom{border-top:1px solid #ffffff28;margin-top:28px;padding:19px 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@media(max-width:1120px){.topbar{gap:15px}.primary-nav{gap:12px}.nav-link{font-size:13px}.brand{font-size:19px}.container{width:min(100% - 40px,1160px)}}
@media(max-width:980px){.primary-nav{display:none}.topbar{height:58px;justify-content:space-between;gap:10px}.brand{margin:auto}.brand img{max-height:30px;max-width:135px}.register-btn{min-height:36px;padding:0 13px;font-size:13px}.menu-toggle{display:flex;flex-direction:column;justify-content:center;gap:4px;background:transparent;border:0;min-width:37px;height:40px;padding:8px}.menu-toggle span{height:2px;width:22px;background:#24364F;border-radius:3px}.mobile-drawer{display:block;position:fixed;inset:0 auto 0 0;width:min(84vw,320px);height:100dvh;overflow-y:auto;background:#FFFFFF;z-index:12000;transform:translateX(-105%);visibility:hidden;pointer-events:none;transition:transform .2s ease,visibility .2s;padding-bottom:24px}.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:#fff;z-index:2;padding:13px 18px;display:flex;align-items:center;justify-content:space-between;color:#137CD8;font-weight:800;box-shadow:0 2px 8px #0000000a}.drawer-close{border:0;background:#eef7ff;color:#24364F;width:37px;height:37px;border-radius:50%;font-size:25px;line-height:1}.drawer-group{padding:17px 17px 5px}.drawer-group strong{display:block;color:#137CD8;font-size:13px;margin-bottom:7px}.drawer-link{display:block;color:#24364F;padding:8px 12px;min-height:41px;font-size:15px;border-radius:8px}.drawer-link.is-current{background:#eaf5ff;color:#137CD8;font-weight:700}.channel-nav{height:43px}.mobile-bottom{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));position:fixed;bottom:0;left:0;right:0;z-index:800;background:#fff;box-shadow:0 -4px 20px #25415a18;min-height:60px;padding-bottom:env(safe-area-inset-bottom)}.mobile-bottom a{color:#5D718A;display:flex;flex-direction:column;align-items:center;justify-content:center;font-size:12px;line-height:1.3;gap:2px}.mobile-bottom a span{font-size:20px;line-height:1.2}.mobile-bottom .is-current{color:#137CD8;font-weight:700}.site-footer{padding-bottom:74px}.back-to-top{bottom:78px}.hero{grid-template-columns:1fr 1fr}.article-layout{grid-template-columns:minmax(0,1fr)}.sidebar{order:2}.side-links{display:grid;grid-template-columns:repeat(3,1fr);gap:0 14px}.footer-grid{gap:24px}}
@media(max-width:700px){.container{width:calc(100% - 32px)}.page-main{padding:20px 0 30px}.hero{display:flex;flex-direction:column-reverse;padding:20px;align-items:stretch;gap:18px}.hero .media{min-height:150px;max-height:195px}.hero h1{font-size:27px;margin:0 0 12px}.lead{font-size:15px}.section{margin-top:28px}.section-heading h2,h2{font-size:21px}.grid-4,.grid-3{grid-template-columns:repeat(2,minmax(0,1fr))}.grid-2,.split{grid-template-columns:1fr}.grid{gap:12px}.tile{padding:16px}.tile h3{font-size:16px}.panel,.prose{padding:20px}.prose h1{font-size:26px}.prose p{font-size:15px}.news-item{padding:16px}.app-split{grid-template-columns:1fr}.app-split .media{order:-1;max-height:260px}.footer-grid{grid-template-columns:repeat(2,minmax(0,1fr));gap:22px}.footer-bottom{flex-direction:column}.side-links{grid-template-columns:repeat(2,minmax(0,1fr))}.brand-card{gap:8px;flex-direction:column;text-align:center}.brand-card .media{width:100%;height:auto;max-height:105px}.brand-card h3{font-size:14px}.thumb-card .media{max-height:145px}}
@media(max-width:370px){.brand{font-size:17px}.brand img{max-width:109px}.register-btn{font-size:12px;padding:0 9px}.grid-3 .tile{padding:12px}.grid-3 .tile h3{font-size:15px}.hero h1{font-size:26px}.channel-link{padding:0 13px}}
@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}.mobile-drawer,.drawer-mask{transition:none}}