*{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,video,svg{max-width:100%}a{color:#0877C9;text-decoration:none;touch-action:manipulation}a:hover{text-decoration:underline}a:focus-visible,button:focus-visible{outline:3px solid #1CA8F6;outline-offset:3px}button{font:inherit;cursor:pointer}.container{width:min(1160px,calc(100% - 36px));margin:0 auto}.site-header{position:sticky;top:0;z-index:1000;background:#fff;box-shadow:0 2px 18px rgba(8,42,70,.07)}.header-inner{height:78px;display:flex;align-items:center;gap:20px;justify-content:space-between;flex-wrap:nowrap}.site-logo,.drawer-logo{display:flex;align-items:center;flex:none;min-width:145px;color:#0877C9;white-space:nowrap}.site-logo img{height:36px;width:auto;max-width:190px;object-fit:contain}.site-logo strong{font-size:23px}.desktop-nav{display:flex;gap:clamp(10px,2vw,28px);align-items:center;white-space:nowrap;flex-wrap:nowrap;margin:auto}.desktop-nav a{color:#223044;padding:8px 3px 6px;border-bottom:2px solid transparent;white-space:nowrap}.desktop-nav a.active{color:#0877C9;border-color:#1CA8F6}.register-btn{background:linear-gradient(135deg,#38C7FF 0%,#1CA8F6 48%,#0877C9 100%);color:#fff;min-height:42px;min-width:92px;border-radius:999px;display:inline-flex;align-items:center;justify-content:center;font-weight:700;flex:none;padding:4px 18px}.register-btn:hover{color:#fff;text-decoration:none}.main-content{padding-top:34px;padding-bottom:76px;min-height:60vh}h1,h2,h3{color:#0877C9;line-height:1.35}h1{font-size:38px;margin:0 0 14px}h2{font-size:24px;margin:0 0 14px}h3{font-size:18px;margin:0 0 10px}p{margin:0 0 16px}.lead{font-size:18px;color:#5F7082;max-width:800px}.eyebrow{font-size:13px;color:#0877C9;font-weight:700;letter-spacing:.12em}.page-hero,.card,.section-card,.brand-card,.qa-item{background:#fff;border:1px solid #e1f0f8;border-radius:18px;box-shadow:0 10px 30px rgba(17,84,128,.045)}.page-hero{padding:34px;margin-bottom:24px}.page-hero p:last-child,.section-card p:last-child,.card p:last-child{margin-bottom:0}.section-card{padding:28px;margin-top:22px}.section-card>p{max-width:1000px}.section-card h2{margin-bottom:12px}.grid-3{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:18px}.grid-2{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:18px}.card{padding:22px;min-width:0}.card h3{margin:8px 0}.card p{color:#5F7082}.more{font-weight:700;display:inline-flex;min-height:40px;align-items:center}.topic-strip{display:flex;gap:12px;flex-wrap:wrap;margin:20px 0}.topic-strip a{background:#EAF7FF;padding:8px 16px;border-radius:100px;min-height:40px;display:inline-flex;align-items:center}.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-placeholder{background:linear-gradient(135deg,#EAF7FF,#d8effe)}.poster-grid .media{height:clamp(220px,23vw,270px);aspect-ratio:auto}.content-media{height:clamp(200px,22vw,250px);aspect-ratio:auto;margin:18px 0}.brand-card .media{height:200px;aspect-ratio:auto;margin-bottom:18px}.brand-card p{font-size:15px}.brand-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:16px}.brand-card{padding:17px;min-width:0}.qa-item{padding:20px;margin:14px 0}.qa-item h3{margin:0 0 8px}.qa-item p{margin:0}.section-number{color:#1CA8F6;font-weight:bold;font-size:13px}.site-footer{background:#082A46;color:#EAF8FF;padding:46px 0 22px}.footer-cols{display:grid;grid-template-columns:1.35fr repeat(3,1fr);gap:30px}.site-footer h2{color:#EAF8FF;font-size:17px}.site-footer a{color:#EAF8FF;display:block;min-height:34px}.footer-logo img{max-height:36px;width:auto;object-fit:contain}.site-footer p{color:#EAF8FF;opacity:.9}.footer-bottom{border-top:1px solid rgba(234,248,255,.2);margin-top:22px;padding-top:20px;display:flex;justify-content:space-between;gap:20px;flex-wrap:wrap;font-size:14px}.mobile-bottom,.menu-toggle{display:none}.mobile-drawer,.drawer-mask{display:none}.back-top{position:fixed;bottom:26px;right:20px;border:0;border-radius:50%;width:42px;height:42px;background:#0877C9;color:#fff;z-index:500}blockquote{margin:18px 0;border-left:4px solid #38C7FF;padding:12px 18px;background:#EAF7FF}body.drawer-open{overflow:hidden}
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@media(min-width:641px) and (max-width:980px){.poster-grid .media{height:180px}.brand-grid{grid-template-columns:repeat(2,minmax(0,1fr))}}
@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}.mobile-drawer{transition:none}}