*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;background:#F5F8FA;color:#294356;font:16px/1.75 -apple-system,BlinkMacSystemFont,"PingFang SC","Microsoft YaHei",sans-serif;overflow-x:hidden}a{color:#176A91;text-decoration:none}a:hover{text-decoration:underline}a:focus-visible,button:focus-visible{outline:3px solid #D1A35B;outline-offset:3px}button{font:inherit;cursor:pointer}img{display:block;max-width:100%;height:auto;object-fit:contain;object-position:center center}h1,h2,h3{color:#173044;line-height:1.35;margin:0 0 15px;overflow-wrap:anywhere}h1{font-size:30px}h2{font-size:23px}h3{font-size:18px}p{margin:0 0 18px}main{padding-top:35px;padding-bottom:72px;min-width:0}.container{width:min(1120px,calc(100% - 48px));margin-inline:auto;min-width:0}.site-head{background:#fff;border-bottom:1px solid #DCE6EC;position:relative;z-index:3}.brandbar{min-height:68px;display:flex;align-items:center;justify-content:space-between;gap:20px}.brand{display:flex;align-items:center;gap:12px;color:#173044;font-size:21px;font-weight:700;line-height:1.1;white-space:nowrap}.brand small{display:block;font-size:10px;letter-spacing:2px;color:#607789;margin-top:6px}.logo{max-width:140px;max-height:34px;width:auto}.head-links{display:flex;align-items:center;gap:22px;font-size:14px}.head-links a,.navlinks a{color:#294356;display:inline-flex;align-items:center;min-height:44px;white-space:nowrap}.head-links .outline a{border:1px solid #176A91;color:#176A91;border-radius:8px;padding:0 17px;height:42px}.active{color:#176A91!important;font-weight:700}.navband{background:#EAF3F7}.navlinks{height:46px;display:flex;align-items:center;justify-content:space-between;gap:17px;overflow-x:auto;scrollbar-width:thin;font-size:14px}.menu-toggle,.mobile-panel{display:none}.skip{position:absolute;top:-100px;left:20px;background:#fff;padding:10px;z-index:10}.skip:focus{top:5px}.section{margin:0 0 54px;min-width:0}.eyebrow{color:#176A91;font-size:14px;font-weight:700;letter-spacing:1px}.hero{padding:18px 0 0}.hero h1{max-width:800px}.hero p{max-width:800px}.actions{display:flex;gap:12px;flex-wrap:wrap;margin:22px 0}.btn{display:inline-flex;align-items:center;justify-content:center;min-height:44px;padding:7px 18px;border-radius:8px;background:#176A91;color:white;font-size:14px}.btn.secondary{background:#fff;color:#176A91;border:1px solid #176A91}.visual{display:flex;align-items:center;justify-content:center;min-width:0;background:#F7F1E6;border-radius:12px;padding:12px}.visual img{max-height:100%;width:auto;max-width:100%;object-fit:contain}.banner{max-width:1120px;max-height:280px;margin:20px auto 0}.banner img{max-height:256px}.visual:has(img){min-height:0}.image-card{max-width:520px;max-height:240px}.image-card img{max-height:216px}.card-image{max-height:170px}.card-image img{max-height:146px}.app-image{max-width:240px;max-height:340px}.app-image img{max-height:316px}.visual:not(:has(img)){display:none}.grid4{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:16px}.grid3{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:18px}.grid2{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:20px}.card,.article,.note{background:#fff;border:1px solid #DCE6EC;border-radius:12px;padding:22px;min-width:0;box-shadow:0 5px 18px #17304408}.card p:last-child,.article p:last-child{margin-bottom:0}.card h3 a{color:#173044}.split{display:grid;grid-template-columns:minmax(0,2fr) minmax(260px,1fr);gap:20px}.stack{display:grid;gap:18px}.feature{display:grid;grid-template-columns:minmax(0,1.2fr) minmax(260px,1fr);align-items:center;gap:28px}.tint{background:#EAF3F7;border-radius:12px;padding:28px}.sand{background:#F7F1E6;border-radius:12px;padding:28px}.section-heading{display:flex;justify-content:space-between;align-items:end;gap:14px;margin-bottom:17px}.text-list{display:grid;gap:12px}.text-list a{display:block;padding:13px 0;border-bottom:1px solid #DCE6EC}.breadcrumb{font-size:14px;color:#607789;margin-bottom:20px}.intro{max-width:760px;color:#607789;margin-bottom:28px}.article-body{max-width:760px;margin:auto}.article-body section{padding:10px 0 24px;border-bottom:1px solid #DCE6EC;margin-bottom:20px}.article-body p{line-height:1.85}.article-body ul{padding-left:1.4em}.article-body li{margin-bottom:8px}.subnav{border-top:1px solid #DCE6EC;padding:28px 0;margin-top:38px}.subnav a{display:inline-flex;min-height:44px;align-items:center;margin-right:20px}.site-footer{background:#123247;color:#e8f1f5;font-size:13px;padding:38px 0 22px}.site-footer h2,.site-footer strong{color:#fff}.site-footer h2{font-size:16px}.site-footer a{display:block;color:#d7e7ef;min-height:34px}.footer-intro{display:flex;justify-content:space-between;gap:30px;align-items:start;max-width:900px;margin-bottom:26px}.footer-intro p{max-width:720px;margin:12px 0 0}.footer-logo{max-width:130px;max-height:30px}.footer-cols{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:20px;border-top:1px solid #416075;padding-top:24px}.copyright{border-top:1px solid #416075;margin-top:22px;padding-top:15px}.bottom-nav{display:none}.faq-item{padding:21px 0;border-bottom:1px solid #DCE6EC}.faq-item h2{font-size:18px}.faq-item p{max-width:760px}@media(max-width:950px){.grid4{grid-template-columns:repeat(2,minmax(0,1fr))}.split,.feature{grid-template-columns:minmax(0,1fr) minmax(0,1fr)}.head-links{gap:12px}}@media(max-width:767px){body{font-size:15px}.container{width:calc(100% - 32px)}h1{font-size:25px}h2{font-size:21px}h3{font-size:17px}.section{margin-bottom:38px}.brandbar{min-height:60px}.head-links,.navband{display:none}.menu-toggle{display:inline-flex;align-items:center;gap:7px;min-height:44px;padding:6px 12px;color:#176A91;background:#fff;border:1px solid #DCE6EC;border-radius:8px;font-size:14px}.mobile-panel:not([hidden]){display:block;position:absolute;top:100%;left:0;right:0;background:#fff;border-top:1px solid #DCE6EC;box-shadow:0 12px 23px #17304422;max-height:calc(100dvh - 66px);overflow-y:auto;overscroll-behavior:contain}.mobile-panel[hidden]{display:none!important}.menu-inner{padding-block:14px 24px}.menu-inner section{margin-bottom:15px}.menu-inner h2{font-size:15px;margin-bottom:6px}.menu-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:5px 12px}.menu-grid a{min-height:44px;display:flex;align-items:center;padding:8px 10px;border-radius:7px;background:#F5F8FA;overflow-wrap:anywhere}.grid4,.grid3,.grid2,.split,.feature{grid-template-columns:minmax(0,1fr)}.card,.article,.note{padding:17px}.tint,.sand{padding:18px}.feature .visual{order:2}.banner{max-height:190px}.banner img{max-height:166px}.image-card,.card-image{max-height:190px}.image-card img,.card-image img{max-height:166px}.app-image{max-height:300px;margin:auto}.app-image img{max-height:276px}.footer-cols{grid-template-columns:repeat(2,minmax(0,1fr));gap:16px}.footer-intro{display:block}.bottom-nav{position:fixed;bottom:0;left:0;right:0;z-index:2;display:grid;grid-template-columns:repeat(5,minmax(0,1fr));background:#fff;border-top:1px solid #DCE6EC;height:calc(56px + env(safe-area-inset-bottom));padding-bottom:env(safe-area-inset-bottom)}.bottom-nav a{font-size:13px;display:flex;align-items:center;justify-content:center;color:#294356;min-width:0;min-height:44px}.bottom-nav .active{border-top:3px solid #176A91}.site-footer{padding-bottom:calc(82px + env(safe-area-inset-bottom))}main{padding-bottom:38px}}@media(max-width:350px){.brand{font-size:18px}.brand .logo{max-width:90px}.menu-toggle{padding-inline:8px}.footer-cols{gap:10px}}