*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;background:#F5FAFE;color:#2A4156;font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Microsoft YaHei",Arial,sans-serif;font-size:15px;line-height:1.7;overflow-x:hidden;padding-bottom:0}body.is-locked{overflow:hidden}a{color:inherit;text-decoration:none}button{font:inherit}.shell{width:min(1120px,calc(100% - 32px));margin:0 auto}.topline{position:fixed;z-index:60;top:0;left:0;right:0;height:22px;background:#1B4A6E;color:#fff;font-size:12px}.topline-inner{height:22px;display:flex;align-items:center;justify-content:space-between}.text-button{border:0;background:transparent;color:#fff;min-width:44px;height:22px;padding:0 4px;cursor:pointer}.masthead{position:fixed;z-index:59;top:22px;left:0;right:0;height:60px;background:#fff;border-bottom:1px solid rgba(74,163,224,.16)}.masthead-inner{height:60px;display:grid;grid-template-columns:1fr auto 1fr;align-items:center}.brand-link{justify-self:start;min-width:44px;min-height:44px;display:inline-flex;align-items:center}.brand-logo,.footer-logo,.drawer-brand img{height:28px;width:auto;max-width:150px;object-fit:contain}.brand-fallback{font-weight:800;color:#16324A;font-size:16px}.drawer-button,.app-link,.icon-button{min-height:44px;border-radius:10px;border:1px solid rgba(74,163,224,.42);background:#fff;color:#1B4A6E;padding:0 16px;font-size:14px;display:inline-flex;align-items:center;justify-content:center;cursor:pointer}.drawer-button{justify-self:center}.app-link{justify-self:end}.tabbar{position:fixed;z-index:58;top:82px;left:0;right:0;height:40px;background:#EAF5FC;border-bottom:1px solid rgba(74,163,224,.16)}.tabbar-inner{height:40px;display:flex;justify-content:center;align-items:center;gap:8px}.tabbar a{height:32px;min-width:76px;padding:0 16px;border-radius:9px;display:flex;align-items:center;justify-content:center;font-size:13px;color:#1B4A6E}.tabbar a.is-current{background:#4AA3E0;color:#fff}.site-main{padding-top:150px;min-height:65vh}.page-hero{padding:34px 0 20px}.eyebrow{font-size:13px;letter-spacing:.08em;color:#4E6A80;margin:0 0 8px}.page-hero h1,.cover-copy h1{font-size:24px;line-height:1.3;color:#16324A;margin:0 0 14px}.page-hero p{max-width:780px;margin:0;color:#4E6A80}.section{padding:24px 0}.section-title{display:flex;align-items:end;justify-content:space-between;gap:16px;margin-bottom:14px}.section-title h2{font-size:20px;color:#16324A;margin:0}.section-title p{margin:0;color:#6E8899;font-size:13px}.card-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:16px}.card,.paper,.feature,.faq-item,.note-card,.index-card{background:#fff;border:1px solid rgba(74,163,224,.16);border-radius:12px;box-shadow:0 12px 28px rgba(27,74,110,.08)}.card,.note-card,.index-card{padding:18px}.card h3,.note-card h3,.index-card h3{font-size:16px;color:#16324A;margin:0 0 8px}.card p,.note-card p,.index-card p{margin:0}.media-slot{width:100%;background:#EAF5FC;border:1px solid rgba(74,163,224,.16);border-radius:12px;display:flex;align-items:center;justify-content:center;overflow:hidden}.media-slot img{width:100%;height:100%;object-fit:contain;object-position:center}.media-hero{height:260px}.media-sm{height:180px}.media-md{height:200px}.media-app{height:340px}.cover-wrap{padding:24px 0}.cover-copy{padding:20px 0 8px;max-width:820px}.cover-copy .lead{font-size:15px;color:#4E6A80;margin:0 0 16px}.button-row{display:flex;flex-wrap:wrap;gap:10px}.btn{min-height:42px;padding:0 18px;border-radius:10px;font-size:14px;display:inline-flex;align-items:center;justify-content:center;white-space:nowrap;border:1px solid transparent}.btn-primary{background:linear-gradient(135deg,#6BB8EC 0%,#4AA3E0 55%,#1B4A6E 100%);color:#fff}.btn-secondary{background:#fff;border-color:rgba(74,163,224,.42);color:#1B4A6E}.btn:hover,.drawer-button:hover,.app-link:hover,.icon-button:hover,.tabbar a:hover,.mobile-bottom a:hover{transform:translateY(-1px)}a:focus-visible,button:focus-visible{outline:3px solid rgba(74,163,224,.42);outline-offset:2px}.number-list{display:grid;gap:10px}.number-item{display:grid;grid-template-columns:46px 1fr;gap:14px;align-items:start;padding:16px;background:#fff;border:1px solid rgba(74,163,224,.16);border-radius:12px}.number{width:42px;height:42px;border-radius:10px;background:#4AA3E0;color:#fff;display:flex;align-items:center;justify-content:center;font-weight:700}.number-item h3{font-size:16px;color:#16324A;margin:0 0 6px}.number-item p{margin:0}.shelf{display:grid;grid-template-columns:repeat(2,1fr);gap:14px}.shelf article{background:#fff;border-left:4px solid #6BB8EC;padding:18px;border-radius:0 12px 12px 0;box-shadow:0 12px 28px rgba(27,74,110,.08)}.shelf h3{margin:0 0 6px;color:#16324A;font-size:16px}.shelf p{margin:0}.timeline{position:relative;margin-left:13px;padding-left:28px;border-left:2px solid #D7EAF6}.timeline article{position:relative;margin:0 0 18px;background:#fff;border:1px solid rgba(74,163,224,.16);border-radius:12px;padding:18px}.timeline article:before{content:"";position:absolute;left:-36px;top:20px;width:14px;height:14px;border-radius:50%;background:#4AA3E0;border:3px solid #F5FAFE}.status{display:inline-flex;padding:2px 10px;border-radius:999px;background:#EAF5FC;color:#1B4A6E;font-size:12px;margin-bottom:6px}.paper{padding:22px}.paper h2{font-size:20px;color:#16324A;margin:0 0 10px}.paper h3{font-size:16px;color:#16324A;margin:22px 0 8px}.paper p{margin:0 0 14px}.paper ul{margin:8px 0 14px;padding-left:20px}.paper li{margin:4px 0}.two-col{display:grid;grid-template-columns:1fr 1fr;gap:16px}.app-feature{display:grid;grid-template-columns:minmax(0,1fr) 320px;gap:20px;align-items:center;background:#fff;border:1px solid rgba(74,163,224,.16);border-radius:14px;padding:20px}.app-feature h2{margin-top:0;color:#16324A}.icon-wrap{display:flex;align-items:center;gap:12px}.icon-48{width:48px;height:48px;object-fit:contain}.link-list{display:grid;grid-template-columns:repeat(2,1fr);gap:10px}.link-list a{background:#fff;border:1px solid rgba(74,163,224,.16);border-radius:10px;padding:14px;min-height:44px;color:#1B4A6E}.faq-list{display:grid;gap:12px}.faq-item{padding:18px}.faq-item h2{font-size:16px;color:#16324A;margin:0 0 8px}.faq-item p{margin:0}.site-footer{margin-top:40px;background:#1B4A6E;color:#E7F2FA;border-top:1px solid #D7EAF6;padding:28px 0 74px;font-size:13px}.footer-top{display:grid;grid-template-columns:220px 1fr;gap:30px}.footer-brand{display:flex;align-items:center;gap:12px}.footer-brand div{display:flex;flex-direction:column}.footer-brand span{opacity:.8}.footer-groups{display:grid;grid-template-columns:repeat(4,1fr);gap:18px}.footer-groups section{display:flex;flex-direction:column;gap:6px}.footer-groups h2{font-size:13px;margin:0 0 4px;color:#fff}.footer-groups a{color:#E7F2FA;opacity:.92}.footer-note{border-top:1px solid rgba(234,245,252,.25);margin-top:20px;padding-top:16px}.footer-note p{margin:4px 0}.page-overlay{position:fixed;z-index:80;inset:0;background:rgba(22,50,74,.34);opacity:0;visibility:hidden;pointer-events:none;transition:.2s}.page-overlay.is-active{opacity:1;visibility:visible;pointer-events:auto}.drawer{position:fixed;z-index:90;top:0;right:0;width:400px;max-width:86vw;height:100dvh;background:#fff;transform:translateX(102%);visibility:hidden;pointer-events:none;transition:transform .25s ease,visibility .25s;box-shadow:-18px 0 40px rgba(27,74,110,.16)}.drawer.is-open{transform:translateX(0);visibility:visible;pointer-events:auto}.drawer-head{height:68px;padding:0 18px;display:flex;align-items:center;justify-content:space-between;border-bottom:1px solid rgba(74,163,224,.16)}.drawer-brand{display:flex;align-items:center;gap:10px}.drawer-scroll{height:calc(100dvh - 68px);overflow-y:auto;padding:12px 18px 30px}.drawer-group{padding:8px 0}.drawer-group h2{font-size:13px;color:#6E8899;margin:0 0 6px}.drawer-group a{display:block;padding:10px;border-radius:10px}.drawer-group a:hover{background:#EAF5FC}.drawer-group strong{display:block;color:#16324A;font-size:14px}.drawer-group span{display:block;color:#4E6A80;font-size:12px;line-height:1.55}.search-layer{position:fixed;z-index:95;top:82px;left:0;right:0;visibility:hidden;pointer-events:none;opacity:0;transition:.2s}.search-layer.is-open{visibility:visible;pointer-events:auto;opacity:1}.search-card{width:min(720px,calc(100% - 32px));margin:0 auto;background:#fff;border:1px solid rgba(74,163,224,.16);box-shadow:0 12px 28px rgba(27,74,110,.08);border-radius:0 0 14px 14px;padding:18px}.search-head{display:flex;align-items:center;justify-content:space-between;color:#16324A}.search-card p{margin:6px 0 12px;color:#4E6A80}.search-presets{display:flex;flex-wrap:wrap;gap:8px}.search-presets a{min-height:40px;padding:0 14px;border-radius:10px;background:#EAF5FC;color:#1B4A6E;display:inline-flex;align-items:center}.mobile-bottom{display:none}.muted{color:#6E8899}.rule-note{padding:16px;border-radius:12px;background:#EAF5FC;color:#2A4156;border:1px solid rgba(74,163,224,.16)}
@media(max-width:820px){body{padding-bottom:calc(56px + env(safe-area-inset-bottom))}.shell{width:calc(100% - 32px)}.tabbar{display:none}.site-main{padding-top:104px}.masthead-inner{grid-template-columns:1fr auto 1fr}.app-link,.drawer-button{padding:0 10px;min-width:44px}.card-grid,.shelf,.two-col,.link-list{grid-template-columns:1fr}.app-feature{grid-template-columns:1fr}.media-app{height:320px}.footer-top{grid-template-columns:1fr}.footer-groups{grid-template-columns:repeat(2,1fr)}.site-footer{padding-bottom:calc(76px + env(safe-area-inset-bottom))}.mobile-bottom{position:fixed;z-index:70;display:grid;grid-template-columns:repeat(5,1fr);left:0;right:0;bottom:0;height:calc(48px + env(safe-area-inset-bottom));padding-bottom:env(safe-area-inset-bottom);background:#fff;border-top:1px solid rgba(74,163,224,.16)}.mobile-bottom a{height:48px;display:flex;align-items:center;justify-content:center;font-size:12px;color:#1B4A6E}.mobile-bottom a.is-current{background:#4AA3E0;color:#fff}.search-layer{top:0;bottom:0;background:#1B4A6E;color:#fff}.search-card{width:100%;height:100%;border:0;border-radius:0;background:#1B4A6E;color:#fff;padding:28px 16px}.search-head{color:#fff}.search-card p{color:#E7F2FA}.search-presets{display:grid;grid-template-columns:repeat(2,1fr)}.search-presets a{background:#fff;color:#1B4A6E}.search-card .icon-button{background:#fff}.page-hero{padding-top:22px}.media-hero{height:220px}}
@media(max-width:480px){.footer-groups{grid-template-columns:1fr 1fr}.card,.paper,.note-card,.index-card{padding:16px}.number-item{grid-template-columns:40px 1fr}.number{width:38px;height:38px}.cover-copy h1,.page-hero h1{font-size:23px}.app-feature{padding:16px}.media-app{height:300px}}