*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;background:#F4FBFF;color:#223044;font:16px/1.8 Arial,"PingFang SC","Microsoft YaHei",sans-serif}a{color:#0877C9;text-decoration:none}a:hover{text-decoration:underline}a:focus-visible,button:focus-visible{outline:3px solid #0877C9;outline-offset:3px}img{max-width:100%}.container{width:min(1160px,calc(100% - 48px));margin-inline:auto}h1,h2,h3{line-height:1.35;color:#223044}h1{font-size:clamp(25px,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}.site-header{position:sticky;top:0;z-index:1000;background:#fff;border-bottom:1px solid #E1EFF8}.head-inner{height:70px;max-width:1208px;padding:0 24px;margin:auto;display:flex;align-items:center;justify-content:space-between;gap:22px}.brand{display:flex;align-items:center;flex:none;gap:8px;color:#0877C9;font-weight:800}.brand-image{background:transparent;border-radius:0;width:130px;height:38px;min-height:0}.brand-image img{max-height:38px;width:auto;max-width:100%;object-fit:contain}.brand-image .media-placeholder{display:none}.brand-fallback{font-size:19px}.desktop-nav{display:flex;align-items:stretch;height:100%;gap:20px;margin-left:auto}.desktop-nav a{display:flex;align-items:center;white-space:nowrap;font-size:15px;font-weight:600;color:#223044;border-bottom:2px solid transparent;padding-top:2px}.desktop-nav a.active,.desktop-nav a:hover{color:#0877C9;border-bottom-color:#1CA8F6;text-decoration:none}.main-btn{display:inline-flex;align-items:center;justify-content:center;min-width:78px;height:40px;padding:0 18px;border-radius:999px;background:#0877C9;color:white;font-weight:700;white-space:nowrap}.main-btn:hover{color:white}.quick-nav{background:#EAF7FF}.quick-inner{max-width:1160px;margin:auto;display:flex;align-items:center;overflow-x:auto;white-space:nowrap;min-height:44px;scrollbar-width:thin}.quick-inner a{flex:none;color:#5F7082;font-size:14px;padding:0 16px;line-height:20px;border-right:1px solid #CDDFEB}.quick-inner a.active{color:#0877C9;font-weight:700}.site-main{padding:32px 0 56px;min-height:55vh}.panel,.article,.aside-panel,.tile,.topic-card{background:#fff;border:1px solid #E0EEF7;border-radius:13px}.panel{padding:28px;margin-bottom:30px}.section-heading{margin-bottom:18px}.muted,.eyebrow{color:#5F7082}.eyebrow{font-size:13px;letter-spacing:1px;font-weight:700;margin-bottom:9px;color:#0877C9}.hero{display:grid;grid-template-columns:55fr 45fr;gap:28px;align-items:center}.hero .media{min-height:230px;max-height:290px}.hero-links{display:flex;flex-wrap:wrap;gap:12px;margin-top:15px}.hero-links a,.pill{display:inline-block;padding:6px 12px;background:#EAF7FF;border-radius:18px;font-size:14px}.media{display:flex;align-items:center;justify-content:center;max-width:100%;min-width:0;overflow:hidden;background:#EAF7FF;border-radius:12px}.media img{display:block;width:auto;height:auto;max-width:100%;max-height:100%;object-fit:contain;object-position:center}.media-natural img{display:block;width:100%;height:auto;max-height:280px;object-fit:contain;margin:auto}.media-placeholder{width:100%;height:100%;min-height:90px;background:#EAF7FF}.media-banner{aspect-ratio:16/7}.media-wide{aspect-ratio:16/9}.media-device{aspect-ratio:9/16;max-height:330px}.media-device img{max-height:330px}.media-brand{height:110px;padding:10px}.media-brand img{max-height:92px}.topic-grid{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:16px}.topic-card{padding:20px;min-width:0}.topic-card h3{font-size:17px}.topic-card p{font-size:14px;color:#5F7082}.two-col{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:20px}.three-col{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:20px}.feature-layout{display:grid;grid-template-columns:1.8fr 1fr;gap:24px}.article-list{list-style:none;padding:0;margin:0;counter-reset:item}.article-list li{border-top:1px solid #E4EDF4;padding:13px 0;display:flex;gap:15px}.article-list li::before{counter-increment:item;content:counter(item,decimal-leading-zero);color:#1CA8F6;font-size:17px;font-weight:bold}.article-list strong{display:block;font-size:17px}.article-list p{font-size:14px;color:#5F7082;margin:2px 0 0}.split{display:grid;grid-template-columns:1fr 1fr;gap:24px;align-items:center}.brand-grid{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:16px}.brand-tile{border:1px solid #E1EDF6;background:white;border-radius:12px;padding:12px;min-width:0}.brand-tile strong{display:block;margin:10px 0 3px;font-size:15px}.brand-tile p{font-size:13px;line-height:1.6;color:#5F7082;margin:0}.page-intro{max-width:900px}.inner-layout{display:grid;grid-template-columns:minmax(0,3fr) minmax(220px,1fr);gap:24px;align-items:start}.article{padding:30px}.prose-section{padding:24px 0;border-top:1px solid #E4EFF7}.prose-section h2{color:#0877C9}.article p{line-height:1.85}.aside-panel{padding:20px;position:sticky;top:128px}.aside-panel h2{font-size:19px}.aside-panel a{display:block;padding:9px 0;border-bottom:1px solid #E7F0F8;font-size:14px}.detail-links{display:flex;flex-wrap:wrap;gap:12px;margin:25px 0 8px}.editor-note{border-left:3px solid #1CA8F6;background:#EAF7FF;padding:13px 16px;font-size:14px}.faq-item{border-bottom:1px solid #E4EFF7;padding:15px 0}.faq-item h2{font-size:18px}.gallery-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:20px}.gallery-item{border:1px solid #E0EEF7;border-radius:12px;padding:12px}.gallery-item .media{max-height:210px}.gallery-item h3{margin:12px 0 5px}.gallery-item p{font-size:14px;color:#5F7082}.site-footer{background:#082A46;color:#EAF8FF;padding:44px 0 20px}.footer-grid{display:grid;grid-template-columns:2fr repeat(3,1fr);gap:32px}.site-footer h2{font-size:17px;color:#fff}.site-footer a{display:block;color:#EAF8FF;font-size:14px;margin:5px 0}.footer-about p{font-size:14px;color:#D2E5F1}.footer-brand{display:flex!important;align-items:center;gap:8px;font-size:19px!important}.footer-brand .brand-image{width:100px}.footer-bottom{border-top:1px solid #27536B;padding-top:18px;margin-top:26px;font-size:12px;display:flex;justify-content:space-between;gap:16px;flex-wrap:wrap}.menu-toggle,.mobile-bottom,.drawer-mask,.mobile-drawer{display:none}.menu-toggle{appearance:none;background:none;border:0;padding:8px;cursor:pointer}.menu-toggle span{display:block;width:22px;height:2px;background:#223044;margin:4px}.drawer-top{display:flex;justify-content:space-between;align-items:center;padding:15px 18px;border-bottom:1px solid #E1EDF6}.drawer-close{font-size:28px;background:none;border:0;cursor:pointer;color:#223044}.drawer-group{padding:10px 18px}.drawer-group h2{font-size:15px;color:#0877C9;margin:6px 0}.drawer-links{display:grid;grid-template-columns:1fr 1fr;gap:2px 10px}.drawer-links a{font-size:14px;color:#223044;min-height:40px;display:flex;align-items:center}.drawer-links a.active{color:#0877C9;font-weight:700}@media(max-width:1100px){.desktop-nav{gap:12px}.head-inner{gap:12px}.brand-image{width:95px}.brand-fallback{font-size:16px}}@media(max-width:980px){.desktop-nav{display:none}.menu-toggle{display:block}.head-inner{height:58px;padding:0 20px;display:grid;grid-template-columns:1fr auto 1fr}.head-inner .menu-toggle{justify-self:start}.head-inner .main-btn{justify-self:end;height:36px}.brand{justify-self:center}.brand-image{height:30px;width:100px}.brand-image img{max-height:30px}.brand-fallback{font-size:16px}.mobile-drawer{display:block;position:fixed;inset:0 auto 0 0;width:min(84vw,320px);height:100dvh;background:#fff;color:#223044;z-index:12000;overflow-y:auto;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(8,42,70,.42);z-index:11000;opacity:0;visibility:hidden;pointer-events:none;transition:opacity .2s ease,visibility .2s}.drawer-mask.is-visible{opacity:1;visibility:visible;pointer-events:auto}body.drawer-open{overflow:hidden}.mobile-bottom{display:grid;grid-template-columns:repeat(4,1fr);position:fixed;bottom:0;left:0;right:0;z-index:800;height:60px;background:#fff;border-top:1px solid #E1EDF6;align-items:center;text-align:center}.mobile-bottom a{color:#0877C9;font-size:14px;font-weight:bold}.site-footer{padding-bottom:86px}.inner-layout{grid-template-columns:minmax(0,1fr)}.aside-panel{position:static}.footer-grid{grid-template-columns:repeat(2,minmax(0,1fr))}.topic-grid{grid-template-columns:repeat(2,minmax(0,1fr))}.brand-grid{grid-template-columns:repeat(3,minmax(0,1fr))}}@media(max-width:700px){.container{width:calc(100% - 32px)}.head-inner{padding:0 16px}.site-main{padding:22px 0 36px}.panel{padding:19px;margin-bottom:24px}.article{padding:20px}.hero,.two-col,.three-col,.feature-layout,.split,.gallery-grid{grid-template-columns:minmax(0,1fr)}h2{font-size:21px}.topic-grid{gap:10px}.topic-card{padding:14px}.topic-card h3{font-size:16px}.topic-card p{font-size:13px}.brand-grid{grid-template-columns:repeat(2,minmax(0,1fr));gap:10px}.brand-tile{padding:9px}.media-brand{height:90px}.media-brand img{max-height:76px}.hero .media{min-height:145px;max-height:190px}.footer-grid{gap:22px}.footer-bottom{display:block}.prose-section{padding:19px 0}.media-device{max-height:250px}.media-device img{max-height:250px}}@media(max-width:350px){.brand-image{width:70px}.brand-fallback{font-size:14px}.head-inner .main-btn{min-width:64px;padding:0 10px}.topic-card{padding:10px}.brand-tile strong{font-size:13px}}