*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;background:#EAF2FB;color:#24364F;font:16px/1.8 Arial,"PingFang SC","Microsoft YaHei",sans-serif}a{color:inherit;text-decoration:none}a:hover{color:#137CD8}button{font:inherit;cursor:pointer}.container{width:min(100% - 48px,1160px);margin-inline:auto}.site-header{position:sticky;top:0;z-index:1000;background:#fff;box-shadow:0 3px 18px #163b6010}.header-inner{min-height:70px;display:flex;align-items:center;gap:28px}.brand{flex:none;display:flex;align-items:center;justify-content:center;max-width:168px}.brand img{display:block;max-width:150px;max-height:38px;width:auto;height:auto;object-fit:contain}.brand-text{color:#137CD8;font-weight:800;font-size:23px;white-space:nowrap}.desktop-nav{display:flex;gap:18px;align-items:center;margin:auto;white-space:nowrap}.desktop-nav a{display:inline-flex;align-items:center;height:70px;border-bottom:2px solid transparent;font-size:14px;font-weight:600}.desktop-nav .active{color:#137CD8;border-bottom-color:#137CD8}.account-btn,.btn{background:#137CD8;color:#fff;border:0;border-radius:999px;padding:8px 20px;display:inline-flex;align-items:center;justify-content:center;white-space:nowrap;font-weight:700;font-size:14px;min-height:41px}.account-btn:hover,.btn:hover{background:#0868b7;color:#fff}.channel-bar{background:#F7FBFF;border-bottom:1px solid #dceaf7}.channel-inner{display:flex;align-items:center;gap:0;white-space:nowrap;overflow-x:auto;min-height:44px;scrollbar-width:thin}.channel-inner a{font-size:13px;color:#5D718A;padding:0 18px;border-right:1px solid #d8e5f1;line-height:18px;flex:none}.channel-inner a:first-child{padding-left:0}.channel-inner a:last-child{border-right:0}.channel-inner a.active{color:#137CD8;font-weight:700}.page-content{padding-top:28px;padding-bottom:68px;min-height:65vh}.panel,.article-card,.category-card,.feature-card,.topic-card,.index-item,.visual-card{background:#fff;border:1px solid rgba(47,168,247,.14);border-radius:12px;box-shadow:0 5px 22px #234a7408}.panel{padding:28px}.page-hero{padding:32px 34px;margin-bottom:24px;background:linear-gradient(130deg,#fff 65%,#f5fbff)}.eyebrow{display:block;color:#137CD8;font-size:13px;font-weight:700;letter-spacing:.04em;margin-bottom:8px}.page-hero h1,.home-hero h1{font-size:32px;line-height:1.33;margin:0 0 16px;color:#173b60}.page-hero p,.home-hero p{margin:0;color:#5D718A;font-size:16px;max-width:820px}.editorial-layout{display:grid;grid-template-columns:minmax(0,1fr) 265px;gap:24px;align-items:start}.article-card{padding:28px 32px}.article-card section+section{margin-top:30px;border-top:1px solid #e4eef8;padding-top:20px}.article-card h2{font-size:23px;line-height:1.4;color:#137CD8;margin:0 0 12px}.article-card p{font-size:16px;margin:0 0 16px;line-height:1.82}.sidebar{padding:24px}.sidebar h2{font-size:19px;margin:0 0 12px;color:#173b60}.sidebar a{display:block;padding:11px 0;border-bottom:1px solid #e7eff7;font-size:15px}.sidebar a:last-child{border:0}.section-title{font-size:25px;line-height:1.4;color:#173b60;margin:0 0 18px}.home-section{margin-top:36px}.grid{display:grid;gap:18px}.cols-2{grid-template-columns:repeat(2,minmax(0,1fr))}.cols-3{grid-template-columns:repeat(3,minmax(0,1fr))}.cols-4{grid-template-columns:repeat(4,minmax(0,1fr))}.category-card,.feature-card,.topic-card,.index-item,.visual-card{padding:20px;min-width:0}.category-card h3,.feature-card h3,.topic-card h3{font-size:18px;margin:0 0 8px;color:#173b60}.category-card p,.feature-card p,.topic-card p,.index-item p,.visual-card p{margin:0 0 12px;font-size:15px;color:#5D718A}.text-link{color:#137CD8;font-weight:700;font-size:14px}.home-hero{display:grid;grid-template-columns:minmax(0,54fr) minmax(0,46fr);gap:24px;align-items:center;padding:26px 28px;background:#fff;border-radius:12px;border:1px solid rgba(47,168,247,.14)}.home-hero h1{font-size:37px}.hero-copy p{margin:0 0 22px}.hero-links{display:flex;gap:10px;flex-wrap:wrap}.hero-links a{padding:8px 15px;border-radius:30px;background:#eaf5ff;color:#137CD8;font-weight:700;font-size:14px}.split{display:grid;grid-template-columns:minmax(0,1.2fr) minmax(0,1fr);gap:18px}.split .panel h3,.split .panel h2{color:#137CD8;margin-top:0}.split .panel p{margin:0 0 12px}.clean-list{margin:0;padding-left:20px}.clean-list li{padding:6px 0}.number-list{counter-reset:num;display:grid;gap:12px}.number-list a{display:flex;gap:18px;align-items:flex-start;padding:16px 20px;border-radius:12px;background:#fff;border:1px solid #e0eefa}.number-list a:before{counter-increment:num;content:counter(num,decimal-leading-zero);font-size:20px;color:#137CD8;font-weight:800}.number-list strong{display:block;color:#24364F}.number-list span{display:block;font-size:14px;color:#5D718A}.media{display:flex;align-items:center;justify-content: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;max-height:235px}.media-banner{aspect-ratio:16/7;max-height:300px}.media-square{aspect-ratio:1/1;max-height:145px}.media-portrait{aspect-ratio:3/4;max-height:260px}.media-device{aspect-ratio:9/16;max-height:340px}.media-natural img{width:100%;height:auto;max-height:280px;object-fit:contain}.media-placeholder{width:100%;height:100%;min-height:80px;background:linear-gradient(135deg,#EDF5FF,#e2f0ff)}.home-hero .media{max-height:290px}.visual-card .media{margin-bottom:12px}.visual-card h3{font-size:16px;margin:0 0 8px;color:#173b60}.brand-card .media{max-height:125px}.brand-card h3{margin:12px 0 5px}.brand-card p{font-size:13px}.image-caption{margin:9px 0 0;color:#5D718A;font-size:14px}.inline-visual{margin:0 0 22px;max-width:460px}.detail-faq{border-bottom:1px solid #e4edf7;padding:14px 0}.detail-faq h3{font-size:17px;color:#173b60;margin:0 0 7px}.detail-faq p{margin:0;font-size:15px}.notice-bar{background:#f5fbff;border-left:3px solid #137CD8;padding:17px 20px;border-radius:8px;margin-top:22px;color:#44617e}.site-footer{background:#102B46;color:#EAF6FF;padding:44px 0 24px}.footer-grid{display:grid;grid-template-columns:1.3fr repeat(3,1fr);gap:38px}.footer-grid h2{font-size:16px;margin:0 0 14px;color:#fff}.footer-grid a:not(.footer-logo){display:block;color:#d0e2f1;font-size:14px;padding:4px 0}.footer-grid a:hover{color:#fff}.footer-grid p{font-size:14px;color:#d0e2f1}.footer-logo{font-weight:800;font-size:22px;color:#fff}.footer-logo img{max-height:40px;max-width:140px;object-fit:contain}.footer-bottom{border-top:1px solid #ffffff25;margin-top:28px;padding-top:18px;display:flex;justify-content:space-between;gap:20px;color:#c7deef;font-size:13px}.menu-trigger,.mobile-bottom,.mobile-drawer,.drawer-mask{display:none}.back-top{position:fixed;bottom:26px;right:20px;border:0;background:#137CD8;color:#fff;width:40px;height:40px;border-radius:50%;opacity:0;pointer-events:none;transition:opacity .2s;z-index:150}.back-top.visible{opacity:1;pointer-events:auto}@media(max-width:980px){.container{width:min(100% - 40px,1160px)}.header-inner{min-height:58px;justify-content:space-between;gap:10px}.desktop-nav{display:none}.brand{margin-inline:auto}.brand img{max-height:29px;max-width:128px}.brand-text{font-size:20px}.account-btn{min-height:36px;padding:7px 12px;font-size:13px}.menu-trigger{display:flex;flex-direction:column;justify-content:center;gap:4px;width:38px;height:40px;border:0;background:none;padding:7px;flex:none}.menu-trigger span{width:23px;height:2px;background:#24364F}.mobile-drawer{display:block;position:fixed;inset:0 auto 0 0;width:min(84vw,320px);height:100vh;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-head{display:flex;justify-content:space-between;align-items:center;padding:15px 18px;border-bottom:1px solid #dfebf8;color:#137CD8}.drawer-close{font-size:30px;border:0;background:none;line-height:1;color:#24364F}.drawer-group{padding:12px 18px}.drawer-group h2{font-size:13px;color:#5D718A;margin:4px 0 8px}.drawer-group a{display:block;min-height:42px;padding:9px 10px;border-radius:8px;font-size:15px}.drawer-group a.active{background:#eaf5ff;color:#137CD8;font-weight:700}.mobile-bottom{display:grid;grid-template-columns:repeat(4,1fr);position:fixed;bottom:0;left:0;right:0;height:60px;background:#fff;border-top:1px solid #e2ecf6;z-index:900}.mobile-bottom a{display:flex;flex-direction:column;align-items:center;justify-content:center;font-size:20px;line-height:1.1;color:#5D718A}.mobile-bottom a.active{color:#137CD8}.mobile-bottom small{font-size:12px;margin-top:4px}.page-content{padding-bottom:92px}.site-footer{padding-bottom:84px}.back-top{bottom:78px}.editorial-layout{grid-template-columns:minmax(0,1fr) 220px;gap:16px}}@media(max-width:768px){.cols-3,.cols-4{grid-template-columns:repeat(2,minmax(0,1fr))}.editorial-layout{grid-template-columns:1fr}.sidebar{order:2}.home-hero{grid-template-columns:1fr}.home-hero .hero-image{order:-1}.home-hero h1{font-size:29px}.split{grid-template-columns:1fr}.footer-grid{grid-template-columns:repeat(2,minmax(0,1fr));gap:26px}.footer-bottom{flex-direction:column;gap:6px}.page-hero h1{font-size:27px}.media-banner{max-height:195px}.media-device{max-height:260px}}@media(max-width:480px){.container{width:calc(100% - 32px)}.page-content{padding-top:18px}.panel,.article-card{padding:20px}.page-hero{padding:23px 20px}.home-hero{padding:17px;gap:14px}.home-hero h1{font-size:27px}.page-hero h1{font-size:25px}.article-card h2{font-size:21px}.article-card p{font-size:15px}.home-section{margin-top:28px}.section-title{font-size:21px}.category-card,.feature-card,.topic-card,.visual-card{padding:14px}.category-card h3,.feature-card h3,.topic-card h3{font-size:16px}.cols-2,.cols-3,.cols-4{gap:12px}.media-wide{max-height:160px}.home-hero .media{max-height:195px}.footer-grid{gap:22px}.footer-grid a:not(.footer-logo){font-size:13px}.account-btn{padding-inline:10px}.brand-text{font-size:18px}}@media(max-width:350px){.account-btn{font-size:12px;padding:6px 8px}.brand img{max-width:106px}.brand-text{font-size:17px}.menu-trigger{width:32px}.category-card{padding:12px}.hero-links a{font-size:12px}}