:root{--ink:#0E2A44;--text:#1C3A56;--muted:#3D5C78;--blue:#1E6FD9;--sky:#6BA8F0;--deep:#0E4A9E;--line:rgba(30,111,217,.26);--bg:#F4F8FC;--pale:#E8F1FA;--card:#fff;--shadow:0 12px 28px rgba(14,42,68,.08)}*{box-sizing:border-box}html{scroll-behavior:smooth;scroll-padding-top:122px}body{margin:0;background:var(--bg);color:var(--text);font:15px/1.75 system-ui,-apple-system,'Microsoft YaHei',sans-serif;overflow-x:hidden}a{color:inherit;text-decoration:none}button,input{font:inherit}button{cursor:pointer}img{max-width:100%;object-fit:contain;object-position:center}p{margin:0 0 15px}h1,h2,h3{color:var(--ink);line-height:1.35;margin:0 0 15px}h1{font-size:24px}h2{font-size:20px}h3{font-size:16px}.container{width:min(960px,calc(100% - 32px));margin:auto}.skip-link{position:absolute;z-index:200;left:-9999px}.skip-link:focus{left:10px;top:10px;background:white;padding:8px}.topbar{height:62px;background:#E8F1FA;border-bottom:3px solid var(--blue);position:fixed;inset:0 0 auto;z-index:80}.top-inner{max-width:960px;height:100%;padding:0 16px;margin:auto;display:flex;align-items:center;justify-content:space-between;gap:12px}.brand{display:flex;align-items:center;gap:8px;font-size:16px;font-weight:800;color:var(--ink);white-space:nowrap}.brand img,.footer-identity img{height:28px;width:auto;max-width:75px}.brand small{display:block;font-size:12px;letter-spacing:.12em;font-weight:500;line-height:1.1}.center-pill{border:1px solid var(--blue);border-radius:30px;height:34px;background:#fff;padding:4px 20px;color:var(--deep);font-size:13px;white-space:nowrap}.top-actions{display:flex;gap:8px;flex-shrink:0}.icon-button{border:1px solid var(--line);border-radius:12px;color:var(--ink);background:white;min-width:44px;min-height:44px;padding:3px 11px;font-weight:700}.desktop-label{margin-left:5px;font-size:13px}.window-nav{height:40px;background:#E8F1FA;margin-top:62px;border-bottom:1px solid var(--line)}.window-inner{height:100%;display:flex;align-items:center;gap:29px}.window-entry{display:flex;align-items:center;gap:7px;font-size:13px;color:#3D5C78}.window-square{width:14px;height:14px;border:2px solid #6BA8F0;border-radius:0 0 0 4px;flex-shrink:0}.window-entry.is-current{color:var(--ink);font-weight:700}.window-entry.is-current .window-square{background:var(--blue);border-color:var(--blue);box-shadow:0 0 12px rgba(30,111,217,.45)}.content-root{min-height:60vh}.crumb{font-size:13px;color:#6A88A0;margin:27px 0 24px}.crumb a{color:var(--deep)}.article{padding-bottom:70px}.page-intro{background:#fff;border:1px solid var(--line);border-radius:18px;display:flex;align-items:center;gap:24px;padding:28px;margin-bottom:24px;box-shadow:var(--shadow)}.page-intro .lead-copy{flex:1;min-width:0}.eyebrow{display:block;color:#0E4A9E;font-size:13px;font-weight:750;letter-spacing:.04em;margin-bottom:11px}.lead{font-weight:700;color:var(--blue);font-size:17px}.feature-media{background:#F4F8FC;width:260px;height:175px;flex-shrink:0;border-radius:14px;display:flex;justify-content:center;align-items:center;overflow:hidden}.feature-media img{width:100%;height:100%;object-fit:contain}.layout-offset{align-items:flex-start}.layout-offset .feature-media{transform:translateY(17px)}.layout-horizontal{flex-direction:column;align-items:stretch}.layout-horizontal .feature-media{width:100%;height:170px}.layout-wrap .feature-media{float:right}.layout-state{border-top:7px solid #6BA8F0}.layout-panel{background:#E8F1FA}.article-sections{display:grid;grid-template-columns:1fr 1fr;gap:16px}.article-part{padding:25px;border:1px solid var(--line);background:#fff;border-radius:14px;min-width:0}.article-part:nth-child(3n){grid-column:1/-1;background:#F7FBFE}.article-part:nth-child(4n){border-left:5px solid #E2B23A}.article-part:nth-child(5n){border-top:5px solid #E07A62}.article-part p{margin:0}.related{display:flex;flex-wrap:wrap;gap:14px;align-items:center;margin-top:24px;padding:18px 20px;background:#E8F1FA;border-radius:14px}.related a,.inline-link{color:var(--deep);font-weight:750}.site-note{margin:20px 0 60px;padding:22px;background:white;border-radius:14px}.home{padding-bottom:70px}.home-intro{padding:44px 0 35px;max-width:775px}.home-intro h1{margin-bottom:10px}.home-statement{font-weight:750;font-size:20px;color:var(--deep);margin:10px 0 17px}.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;min-height:44px;border-radius:12px;padding:9px 20px;font-size:14px;font-weight:750;margin-top:12px}.primary{background:linear-gradient(135deg,#6BA8F0 0%,#1E6FD9 54%,#0E4A9E 100%);color:#F4F8FC;box-shadow:0 6px 16px rgba(30,111,217,.24)}.btn:hover,.icon-button:hover{filter:brightness(1.05);box-shadow:0 0 0 3px rgba(107,168,240,.5),0 10px 24px rgba(14,74,158,.24)}.btn:active,.icon-button:active{filter:brightness(1.06);box-shadow:0 0 0 4px rgba(226,178,58,.36),0 0 22px rgba(30,111,217,.5)}:focus-visible{outline:2px solid #0E4A9E;outline-offset:2px}a,button{transition:box-shadow .18s,filter .18s}.feature{background:white;border:1px solid var(--line);border-radius:14px;margin:0 0 19px;padding:24px;display:flex;gap:26px;align-items:center;box-shadow:var(--shadow)}.feature .feature-text{flex:1;min-width:0}.media{width:240px;min-width:200px;height:160px;flex-shrink:0;border-radius:12px;background:#F4F8FC;display:flex;align-items:center;justify-content:center;overflow:hidden}.media img{height:100%;width:100%;object-fit:contain}.feature.stagger{display:block;background:#E8F1FA}.stagger-first{max-width:70%;padding:2px 0 18px}.stagger-second{display:flex;align-items:center;gap:26px;margin-left:11%;padding:16px;background:white;border-radius:14px}.stagger-second .media{height:168px}.feature.strip{border-left:7px solid var(--blue)}.feature.sheet{flex-direction:column;align-items:flex-start}.feature.sheet .media{width:100%;height:160px}.feature.flowing{flex-direction:row-reverse}.feature.compact{background:#F7FBFE}.feature:nth-of-type(3n) .media{background:#E8F1FA}.feature:nth-of-type(4n){border-top:4px solid #E2B23A}.feature:nth-of-type(5n){border-left:4px solid #E07A62}.home-end{padding:26px;background:#fff;border-radius:14px;margin:24px 0;border:1px solid var(--line)}.question{padding:15px 0;border-bottom:1px solid var(--line)}.question:last-of-type{margin-bottom:16px}.question p{margin:0}.brand-media{height:140px;background:#F4F8FC;display:flex;align-items:center;justify-content:center;margin-bottom:18px}.brand-media img{height:100%;max-width:100%;object-fit:contain}.faq-head{padding:20px 0 28px}.faq-list{display:grid;grid-template-columns:1fr 1fr;gap:16px;padding-bottom:65px}.faq-entry{background:#fff;border-radius:14px;padding:23px;border:1px solid var(--line)}.faq-entry p{margin:0}.footer{background:#0E2A44;color:#E8F1FA;border-top:3px solid var(--blue);padding:36px 0 24px;font-size:13px}.footer-identity{display:flex;align-items:center;gap:10px}.footer-identity strong{font-size:16px}.footer-identity small{opacity:.8}.footer-groups{display:grid;grid-template-columns:repeat(4,1fr);gap:20px;margin:28px 0}.footer-groups h2{color:#E8F1FA;font-size:15px;margin-bottom:12px}.footer-groups a{display:block;margin:7px 0;color:#E8F1FA}.footer a:hover{text-decoration:underline}.footer-note{border-top:1px solid rgba(232,241,250,.2);padding-top:18px}.copyright{opacity:.75}.overlay{position:fixed;inset:62px 0 0;background:rgba(14,42,68,.44);z-index:88}.overlay[hidden]{display:none!important}.lock-scroll{overflow:hidden}.menu-panel,.search-panel{position:fixed;z-index:90;background:#fff;visibility:hidden;pointer-events:none;opacity:0;box-shadow:0 20px 45px rgba(14,42,68,.2);transition:opacity .18s,visibility .18s}.menu-panel.visible,.search-panel.visible{visibility:visible;pointer-events:auto;opacity:1}.menu-panel{left:16px;top:70px;width:min(560px,calc(100vw - 32px));max-height:70vh;border-left:8px solid #1E6FD9;border-radius:0 14px 14px 0;display:flex;flex-direction:column}.panel-title,.search-top{display:flex;justify-content:space-between;align-items:center;padding:14px 18px;border-bottom:1px solid var(--line)}.close-btn{min-width:44px;min-height:44px;background:#E8F1FA;border:0;border-radius:10px;color:#0E2A44;font-size:24px}.menu-scroller{overflow-y:auto;padding:8px 18px 20px}.menu-group h2{font-size:16px;margin:15px 0 10px}.menu-links{display:grid;grid-template-columns:1fr 1fr;gap:9px}.menu-links a,.search-results a{display:flex;flex-direction:column;border:1px solid var(--line);padding:8px 11px;border-radius:10px;min-height:57px}.menu-links small,.search-results small{font-size:12px;color:#3D5C78}.search-panel{top:70px;right:16px;width:min(420px,calc(100vw - 32px));border-radius:14px;padding-bottom:18px}.search-panel label{display:block;margin:12px 18px 8px;font-size:13px}.search-panel input{display:block;width:calc(100% - 36px);margin:0 18px 12px;padding:10px 12px;border:1px solid #1E6FD9;border-radius:10px;background:#fff;color:#0E2A44;min-height:44px}.search-results{padding:0 18px;display:grid;grid-template-columns:1fr 1fr;gap:8px;max-height:48vh;overflow:auto}.search-results a[hidden]{display:none}.search-empty{margin:12px 18px}.mobile-bottom{display:none}@media(max-width:650px){html{scroll-padding-top:75px}.window-nav{display:none}.content-root{padding-top:62px}.top-inner{gap:7px;padding:0 12px}.brand{gap:5px}.brand img{max-width:43px}.center-pill{display:none}.desktop-label{display:none}.icon-button{padding:3px 8px}.container{width:calc(100% - 32px)}.home-intro{padding-top:30px}.page-intro,.feature,.feature.flowing{flex-direction:column;align-items:stretch;padding:20px}.page-intro .feature-media,.feature .media{width:100%;height:165px;min-width:0}.page-intro.layout-offset .feature-media{transform:none}.article-sections,.faq-list{grid-template-columns:1fr}.article-part:nth-child(3n){grid-column:auto}.stagger-first{max-width:100%}.stagger-second{margin-left:0;display:block}.stagger-second .media{width:100%;margin-bottom:13px}.feature.stagger{padding:17px}.feature.sheet .media{width:100%}.footer{padding-bottom:84px}.footer-groups{grid-template-columns:repeat(2,minmax(0,1fr))}.mobile-bottom{display:grid;grid-template-columns:repeat(4,1fr);position:fixed;bottom:0;left:0;right:0;z-index:79;height:calc(48px + env(safe-area-inset-bottom));padding-bottom:env(safe-area-inset-bottom);background:#E8F1FA;border-top:1px solid var(--line)}.mobile-bottom a{display:flex;align-items:center;justify-content:center;font-size:13px;color:#3D5C78;min-height:48px}.mobile-bottom .is-current{color:#0E2A44;border-top:3px solid var(--blue);font-weight:800;box-shadow:0 -3px 12px rgba(30,111,217,.17)}.menu-panel{max-height:calc(100vh - 92px)}.search-panel{inset:62px 0 0;width:100vw;max-height:none;height:calc(100dvh - 62px);background:#0E2A44;border-radius:0;color:#E8F1FA}.search-panel strong,.search-panel label{color:#E8F1FA}.search-panel .close-btn{background:#E8F1FA}.search-results a{border-color:#6BA8F0;color:#E8F1FA}.search-results small{color:#E8F1FA}.search-results{max-height:65vh}.search-top{border-color:#6BA8F0}.related{flex-wrap:wrap}.brand-media{height:120px}}