*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;background:#F4FBFF;color:#223044;font:16px/1.75 Arial,"PingFang SC","Microsoft YaHei",sans-serif;overflow-x:hidden}img,svg{max-width:100%}a{color:#0877C9;text-decoration:none;touch-action:manipulation}a:hover{text-decoration:underline}button{font:inherit;cursor:pointer}button,a{ -webkit-tap-highlight-color:transparent}button:focus-visible,a:focus-visible{outline:3px solid #38C7FF;outline-offset:3px}.wrap{width:min(calc(100% - 32px),1160px);margin-inline:auto}.skip-link{position:absolute;top:-70px;left:8px;z-index:20000;background:#fff;padding:12px}.skip-link:focus{top:4px}.site-header{background:#fff;border-bottom:1px solid #e5f3fc;position:relative;z-index:100}.header-inner{height:76px;display:flex;align-items:center;gap:28px;justify-content:space-between}.brand-logo{display:flex;align-items:center;flex:0 0 auto;color:#0877C9;white-space:nowrap}.brand-logo img{width:auto;height:36px;max-width:160px;object-fit:contain}.brand-logo strong{font-size:23px;letter-spacing:1px}.main-nav{display:flex;justify-content:center;align-self:stretch;gap:24px;flex:1;white-space:nowrap;min-width:0}.main-nav a{height:100%;display:inline-flex;align-items:center;border-bottom:2px solid transparent;font-weight:600;color:#223044}.main-nav a.active,.main-nav a[aria-current]{border-color:#1CA8F6;color:#0877C9}.register-btn{display:flex;flex:0 0 auto;align-items:center;justify-content:center;min-width:90px;height:42px;padding:0 22px;border-radius:999px;background:linear-gradient(135deg,#38C7FF 0%,#1CA8F6 48%,#0877C9 100%);color:#fff;font-weight:700;box-shadow:0 5px 18px rgba(28,168,246,.2)}.register-btn:hover{color:#fff;text-decoration:none;filter:brightness(.96)}.menu-toggle{display:none}.topic-strip{background:#EAF7FF;border-bottom:1px solid #d6edf9}.topic-strip .wrap{display:flex;align-items:center;gap:23px;white-space:nowrap;overflow-x:auto;scrollbar-width:none;padding:9px 0}.topic-strip span{color:#5F7082;font-size:14px}.topic-strip a{font-size:14px;flex-shrink:0}.site-main{padding:34px 0 68px;min-height:65vh}h1,h2,h3{color:#0877C9;line-height:1.35;margin:0 0 16px}h1{font-size:clamp(27px,3.5vw,38px);letter-spacing:.2px}h2{font-size:25px}h3{font-size:19px}p{margin:0 0 17px}.lead{font-size:18px;color:#485b6c;max-width:870px}.eyebrow{font-size:13px;color:#0877C9;font-weight:700;letter-spacing:1.6px}.hero{padding:8px 0 25px}.hero.center{text-align:center}.hero.center .lead{margin:0 auto}.card{background:#fff;border:1px solid #e3f2fb;border-radius:18px;padding:24px;box-shadow:0 7px 26px rgba(20,113,168,.04)}.card h2{font-size:23px}.cards-3{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:18px}.cards-2{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:18px}.section{margin:28px 0 36px}.section-head{display:flex;align-items:baseline;justify-content:space-between;gap:16px}.text-link{font-weight:700}.media{position:relative;width:100%;max-width:100%;overflow:hidden;border-radius:14px;background:#EAF7FF;aspect-ratio:16/9}.media > img{position:absolute;inset:0;width:100%;height:100%;object-fit:contain;object-position:center center;display:block}.media-fallback{display:block;width:100%;height:100%;background:linear-gradient(145deg,#eaf7ff,#d8f0ff)}.poster{height:clamp(220px,22vw,280px);aspect-ratio:auto}.feature-media{height:240px;aspect-ratio:auto}.poster-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:16px}.poster-grid .poster{height:240px}.topic-card{display:flex;flex-direction:column;gap:12px}.topic-card p{flex:1}.number{display:inline-flex;background:#EAF7FF;border-radius:40px;color:#0877C9;font-size:13px;padding:3px 12px;align-self:flex-start}.article-layout{display:grid;grid-template-columns:minmax(0,1fr) 270px;gap:24px;align-items:start}.article-body{background:#fff;border:1px solid #e3f2fb;border-radius:18px;padding:30px}.article-body p{margin-bottom:19px}.article-body h2{margin-top:29px}.aside-links{position:sticky;top:20px}.aside-links a{display:block;padding:10px 0;border-bottom:1px solid #e7f4fb}.aside-links h2{font-size:21px}.qa-item{padding:19px 0;border-top:1px solid #e2f0f9}.qa-item h2{font-size:20px;margin-bottom:6px}.qa-item p{margin-bottom:0}.brand-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:18px}.brand-card{display:grid;grid-template-columns:165px 1fr;gap:18px;align-items:center}.brand-card .media{height:118px;aspect-ratio:auto}.brand-card h2{font-size:20px;margin-bottom:9px}.brand-card p{font-size:15px;margin:0}.brand-card.no-image{grid-template-columns:1fr}.simple-list{display:grid;gap:12px}.simple-list article{background:#fff;border:1px solid #e2f1fb;border-radius:14px;padding:20px}.site-footer{background:#082A46;color:#EAF8FF;padding:46px 0 30px}.footer-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:28px}.site-footer h2{color:#fff;font-size:19px}.site-footer a{color:#EAF8FF;display:block;padding:4px 0}.footer-bottom{border-top:1px solid rgba(234,248,255,.2);margin-top:34px;padding-top:23px;color:#EAF8FF;font-size:14px}.footer-bottom p{margin:8px 0}.footer-logo img{height:36px;width:auto;object-fit:contain}.mobile-bottom{display:none}.mobile-drawer,.drawer-mask{display:none}.back-top{position:fixed;right:18px;bottom:24px;border:0;border-radius:50%;width:42px;height:42px;background:#0877C9;color:#fff;box-shadow:0 6px 20px #0877c933;z-index:100}.note{background:#EAF7FF;padding:16px 20px;border-radius:12px;border-left:3px solid #1CA8F6}.tag-links{display:flex;flex-wrap:wrap;gap:10px}.tag-links a{background:#EAF7FF;border-radius:100px;padding:6px 14px;font-size:14px}
@media(max-width:980px){
.mobile-drawer{display:block;position:fixed;inset:0 auto 0 0;width:min(84vw,320px);background:#fff;color:#223044;z-index:12000;transform:translateX(-105%);transition:transform .2s ease}
.mobile-drawer.is-open{transform:translateX(0)}
.drawer-mask{display:none;position:fixed;inset:0;background:rgba(8,42,70,.42);z-index:11000;opacity:0;pointer-events:none}
.drawer-mask.is-visible{display:block;opacity:1;pointer-events:auto}
body.drawer-open{overflow:hidden}.main-nav{display:none}.header-inner{height:62px;display:grid;grid-template-columns:1fr auto 1fr;gap:8px}.menu-toggle{display:flex;flex-direction:column;gap:4px;justify-content:center;align-items:center;border:0;background:transparent;width:44px;height:44px;padding:10px}.menu-toggle span{width:21px;height:2px;background:#0877C9;display:block}.header-inner .brand-logo{justify-self:center}.header-inner .brand-logo img{height:28px;max-width:135px}.header-inner .brand-logo strong{font-size:19px}.header-inner .register-btn{justify-self:end;min-width:72px;height:36px;padding:0 13px;font-size:14px}.drawer-head{height:66px;display:flex;align-items:center;justify-content:space-between;border-bottom:1px solid #e1f0f9;padding:0 15px}.drawer-head .brand-logo img{height:28px}.drawer-close{font-size:30px;width:44px;height:44px;background:none;border:0;color:#0877C9}.drawer-scroll{overflow-y:auto;height:calc(100dvh - 66px);padding:14px 18px 30px}.drawer-scroll h2{font-size:15px;margin:15px 0 4px;color:#5F7082}.drawer-scroll a{display:flex;align-items:center;min-height:42px;padding:5px 9px;border-bottom:1px solid #edf5fa;color:#223044}.mobile-bottom{display:grid;position:fixed;bottom:0;left:0;right:0;grid-template-columns:repeat(4,minmax(0,1fr));background:#fff;border-top:1px solid #d6eefa;z-index:500;height:60px;padding-bottom:env(safe-area-inset-bottom)}.mobile-bottom a{display:flex;align-items:center;justify-content:center;min-height:40px;font-size:14px;color:#0877C9;font-weight:700}.mobile-bottom a:last-child{background:linear-gradient(135deg,#38C7FF,#0877C9);color:#fff;margin:10px 12px;border-radius:999px}.site-main{padding-bottom:95px}.back-top{bottom:78px}.article-layout{grid-template-columns:1fr}.aside-links{position:static}.cards-3{grid-template-columns:1fr}.poster-grid{grid-template-columns:1fr}.poster-grid .poster{height:170px}.brand-grid{grid-template-columns:1fr}.footer-grid{grid-template-columns:repeat(3,minmax(0,1fr))}
}
@media(max-width:600px){.wrap{width:min(calc(100% - 28px),1160px)}.site-main{padding-top:22px}.article-body{padding:20px}.lead{font-size:16px}.cards-2,.footer-grid{grid-template-columns:1fr}.card{padding:19px}.poster-grid .poster{height:160px}.feature-media{height:160px}.brand-card{grid-template-columns:118px 1fr;gap:12px}.brand-card .media{height:110px}.brand-card h2{font-size:18px}.brand-card p{font-size:14px}.topic-strip .wrap{gap:16px}h2{font-size:23px}}
@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}.mobile-drawer{transition:none}}