*{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:#137cd8;text-decoration:none}a:hover{text-decoration:underline}button{font:inherit}img{max-width:100%}.wrap{width:min(100% - 48px,1160px);margin-inline:auto}.site-header{position:sticky;top:0;z-index:100;background:#fff;box-shadow:0 3px 12px rgba(20,78,126,.07)}.topbar{min-height:70px;display:flex;align-items:center;gap:22px}.site-logo{display:flex;align-items:center;gap:9px;color:#137cd8;min-width:170px;font-weight:800;white-space:nowrap}.site-logo .media{width:40px;height:38px;border-radius:6px;background:transparent}.site-logo .media img{max-width:100%;max-height:38px}.logo-text{display:flex;flex-direction:column;font-size:19px;line-height:1.2}.logo-text small{font-size:9px;letter-spacing:1.2px;color:#5d718a}.main-nav{display:flex;align-items:center;justify-content:center;gap:22px;flex:1;white-space:nowrap}.main-nav a{color:#24364f;font-size:14px;padding:22px 0 20px;border-bottom:2px solid transparent}.main-nav a.active,.main-nav a:hover{color:#137cd8;border-bottom-color:#137cd8;text-decoration:none}.register-btn,.btn{display:inline-flex;align-items:center;justify-content:center;background:#137cd8;color:#fff;font-weight:700;border-radius:999px;padding:8px 19px;white-space:nowrap;font-size:14px;min-height:40px}.register-btn:hover,.btn:hover{color:#fff;background:#0965b9;text-decoration:none}.subnav{background:#f7fbff;border-top:1px solid #edf4fb}.subnav-scroll{display:flex;align-items:center;gap:0;overflow-x:auto;scrollbar-width:none;white-space:nowrap}.subnav-scroll a{font-size:13px;color:#5d718a;padding:10px 16px;position:relative;flex:none}.subnav-scroll a:first-child{padding-left:0}.subnav-scroll a:not(:first-child):before{content:"";position:absolute;left:0;top:17px;height:12px;border-left:1px solid #d9e6f5}.subnav-scroll a.active{color:#137cd8;font-weight:700}.menu-toggle{display:none}main.wrap{padding-top:26px;padding-bottom:62px;min-height:55vh}.card,.section{background:#fff;border:1px solid rgba(47,168,247,.14);border-radius:12px;box-shadow:0 5px 22px rgba(33,91,141,.045)}.section{padding:30px;margin-bottom:28px}.section h2{font-size:24px;line-height:1.4;color:#173d69;margin:0 0 18px}.section h3{color:#176eaf;font-size:19px;margin:22px 0 8px}.section p{margin:0 0 16px}.eyebrow{font-size:13px;font-weight:700;color:#137cd8;letter-spacing:1px}.hero{display:grid;grid-template-columns:54% 46%;gap:0;align-items:center;padding:30px}.hero-copy{padding:5px 28px 5px 0}.hero h1{font-size:36px;line-height:1.33;letter-spacing:-.5px;color:#113c68;margin:12px 0 18px}.hero p{color:#5d718a;font-size:16px}.hero .media{max-height:285px}.hero .media-banner{aspect-ratio:16/9}.hero-links{display:flex;flex-wrap:wrap;gap:10px;margin-top:20px}.hero-links a:not(.btn),.taglink{background:#eef6ff;border-radius:30px;padding:6px 13px;font-size:14px}.grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:18px}.grid.two{grid-template-columns:repeat(2,minmax(0,1fr))}.grid.four{grid-template-columns:repeat(4,minmax(0,1fr))}.content-card{padding:20px;border:1px solid #dfedf9;background:#fafdff;border-radius:12px;min-width:0}.content-card h3{font-size:18px;margin:0 0 8px}.content-card p{font-size:15px;color:#526a85;margin:0 0 12px}.content-card .media{margin-bottom:12px}.linkrow{display:flex;flex-wrap:wrap;gap:10px;margin-top:18px}.page-heading h1{font-size:32px;line-height:1.35;color:#143e6a;margin:8px 0 12px}.page-heading p{max-width:820px;color:#556f8b}.article-layout{display:grid;grid-template-columns:minmax(0,790px) minmax(220px,1fr);gap:22px;align-items:start}.article-body{padding:30px}.article-body h2{font-size:23px;color:#153f6a;margin:28px 0 12px}.article-body h2:first-child{margin-top:0}.article-body p{margin:0 0 19px}.sidebar{padding:22px;position:sticky;top:140px}.sidebar h2{font-size:19px;margin:0 0 10px}.sidebar a{display:block;padding:8px 0;border-bottom:1px solid #edf3f9}.article-index{padding-left:22px}.article-index li{padding:12px 0;border-bottom:1px solid #e6eff9}.article-index li strong{display:block;color:#143e6a}.article-index li p{margin:3px 0;color:#536e89}.page-links{margin-top:26px;border-top:1px solid #e8f0f9;padding-top:20px}.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}.media-banner{aspect-ratio:16/7}.media-square{aspect-ratio:1/1}.media-portrait{aspect-ratio:3/4}.media-device{aspect-ratio:9/16;max-height:340px}.media-natural img{width:100%;height:auto;max-height:280px;object-fit:contain;margin:0 auto}.media-placeholder{width:100%;height:100%;min-height:50px;background:#edf5ff}.figure-caption{font-size:14px;color:#5d718a;margin:10px 0 0}.brand-grid .media{max-height:140px;aspect-ratio:1/1}.brand-grid .content-card{text-align:center}.brand-grid h3{font-size:16px;margin:9px 0}.site-footer{background:#102b46;color:#eaf6ff;padding:44px 0 22px}.footer-grid{display:grid;grid-template-columns:1.7fr 1fr 1fr 1fr;gap:32px}.footer-grid h2{font-size:17px;margin:0 0 13px}.footer-grid a{display:block;color:#eaf6ff;font-size:14px;padding:3px 0}.footer-grid p{font-size:14px;color:#cee2f5}.footer-brand{display:flex!important;align-items:center;gap:10px;font-size:19px!important}.footer-brand .media{width:40px;height:40px;background:transparent}.footer-bottom{border-top:1px solid #34516b;padding-top:16px;margin-top:28px;display:flex;gap:15px;justify-content:space-between;font-size:12px;color:#bdd3e6}.drawer-mask,.mobile-drawer,.bottom-nav{display:none}.to-top{position:fixed;right:20px;bottom:22px;border:0;border-radius:50%;width:42px;height:42px;background:#137cd8;color:#fff;cursor:pointer;opacity:0;pointer-events:none;transition:opacity .2s}.to-top.show{opacity:1;pointer-events:auto}@media(max-width:1100px){.main-nav{gap:12px}.topbar{gap:12px}.site-logo{min-width:150px}}@media(max-width:980px){.wrap{width:calc(100% - 40px)}.topbar{min-height:58px;justify-content:space-between}.menu-toggle{display:flex;flex-direction:column;gap:5px;justify-content:center;background:transparent;border:0;width:36px;height:40px;padding:6px;cursor:pointer}.menu-toggle span{width:23px;border-top:2px solid #24364f}.main-nav{display:none}.site-logo{min-width:0;margin:0 auto}.site-logo .media{width:31px;height:30px}.site-logo .media img{max-height:30px}.logo-text{font-size:17px}.register-btn{min-height:36px;padding:5px 12px;font-size:13px}.subnav-scroll a{padding:9px 13px}.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}.mobile-drawer{display:block;position:fixed;inset:0 auto 0 0;width:min(84vw,320px);height:100dvh;overflow-y:auto;background:#fff;z-index:12000;transform:translateX(-105%);visibility:hidden;pointer-events:none;transition:transform .2s ease,visibility .2s;padding:0 20px 26px}.mobile-drawer.is-open{transform:translateX(0);visibility:visible;pointer-events:auto}.drawer-heading{position:sticky;top:0;background:#fff;display:flex;justify-content:space-between;align-items:center;padding:12px 0;border-bottom:1px solid #e6edf5}.drawer-heading button{border:0;background:transparent;font-size:26px;padding:2px 12px}.drawer-section{border-bottom:1px solid #e8f1f9;padding:10px 0}.drawer-section h2{font-size:15px;color:#137cd8;margin:8px 0}.drawer-section a{display:block;min-height:42px;color:#24364f;padding:6px 8px}.drawer-section a:hover{color:#137cd8}body.drawer-open{overflow:hidden}.bottom-nav{display:grid;grid-template-columns:repeat(4,1fr);position:fixed;bottom:0;left:0;right:0;height:60px;z-index:100;background:#fff;box-shadow:0 -3px 15px #163f6420}.bottom-nav a{display:flex;align-items:center;justify-content:center;font-size:14px;color:#5d718a}.bottom-nav a.active{color:#137cd8;font-weight:700;border-top:2px solid #137cd8}.site-footer{padding-bottom:83px}.to-top{bottom:75px}.article-layout{grid-template-columns:1fr}.sidebar{position:static}.footer-grid{grid-template-columns:repeat(2,minmax(0,1fr))}.grid{grid-template-columns:repeat(2,minmax(0,1fr))}.grid.four{grid-template-columns:repeat(2,minmax(0,1fr))}}@media(max-width:600px){body{font-size:15px}.wrap{width:calc(100% - 32px)}main.wrap{padding-top:16px;padding-bottom:30px}.section{padding:20px 17px;margin-bottom:20px}.section h2{font-size:21px}.section h3{font-size:17px}.hero{display:flex;flex-direction:column-reverse;padding:16px}.hero .media{max-height:195px}.hero-copy{padding:16px 2px 2px}.hero h1{font-size:27px}.page-heading h1{font-size:27px}.article-body{padding:21px 18px}.article-body h2{font-size:21px}.content-card{padding:14px}.content-card h3{font-size:16px}.content-card p{font-size:14px}.grid{gap:12px}.media-device{max-height:260px}.footer-grid{gap:18px}.footer-bottom{flex-direction:column}.logo-text small{font-size:8px}.site-logo{gap:5px}.site-logo .media{width:28px}.register-btn{padding-inline:10px}.grid.two.mobile-stack{grid-template-columns:1fr}}@media(max-width:350px){.logo-text{font-size:15px}.site-logo .media{width:24px}.register-btn{font-size:12px;padding-inline:8px}.grid.compact-safe{grid-template-columns:1fr}}@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}*,*:before,*:after{transition:none!important}}