@charset "UTF-8";
:root{--navy:#0b1626;--navy2:#12243b;--ink:#142236;--muted:#596779;--line:#dce4e9;--paper:#f8fafb;--white:#fff;--aqua:#78d9dd;--accent:#296678;--serif:"Noto Serif SC","Songti SC","SimSun",serif;--sans:Inter,"Noto Sans SC","Microsoft YaHei",Arial,sans-serif}
*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;background:#fff;color:var(--ink);font-family:var(--sans);line-height:1.7;-webkit-font-smoothing:antialiased}img{display:block;max-width:100%;height:auto}a{color:inherit;text-decoration:none}button{font:inherit}h1,h2,h3,p{margin-top:0}h1,h2,h3{line-height:1.25}p{line-height:1.85}.container{width:min(100% - 48px,1240px);margin-inline:auto}.skip-link{position:absolute;z-index:100;top:-100px;left:15px;background:#fff;padding:12px}.skip-link:focus{top:12px}a:focus-visible,button:focus-visible,summary:focus-visible{outline:3px solid #62cacf;outline-offset:3px}
.site-header{height:78px;background:#fff;border-bottom:1px solid #e9eef2;position:relative;z-index:30}.header-inner{display:flex;align-items:center;justify-content:space-between;height:100%;gap:24px}.brand{display:flex;align-items:center;gap:11px;flex:none}.brand img{border-radius:10px}.brand span{display:flex;flex-direction:column;line-height:1.05}.brand strong{font-size:24px;letter-spacing:-.06em;color:#13263b}.brand small{font-size:10px;letter-spacing:.075em;color:#738091;margin-top:6px;white-space:nowrap}.main-nav{display:flex;align-items:center;gap:5px}.nav-link{position:relative;padding:11px 15px;color:#425064;font-size:13px;font-weight:600;white-space:nowrap;transition:color .2s}.nav-link:hover,.nav-link.is-active{color:#102e46}.nav-link.is-active:after{content:"";position:absolute;bottom:2px;left:15px;right:15px;height:2px;background:#2b778a}.menu-toggle{display:none}
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.intro-strip{border-bottom:1px solid var(--line);background:#eaf2f2}.intro-strip .container{display:flex;align-items:center;gap:26px;min-height:78px}.intro-strip span{font-size:11px;letter-spacing:.15em;color:#437280;font-weight:800;white-space:nowrap}.intro-strip p{font-size:14px;margin:0;flex:1}.intro-strip a{font-size:12px;font-weight:700;color:#275e6b;white-space:nowrap}.section{padding:94px 0}.section-paper{background:var(--paper)}.section-heading{display:flex;align-items:end;justify-content:space-between;gap:36px;margin-bottom:35px}.section-heading h2,.editorial-grid h2,.faq-grid h2{font-size:clamp(31px,3.4vw,46px);letter-spacing:-.055em;font-weight:730;margin:10px 0 0}.section-heading>p{max-width:380px;color:var(--muted);font-size:14px;margin:0}.section-label{color:#387688;font-size:11px;font-weight:800;letter-spacing:.2em}.cards-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:20px}.article-card{border:1px solid #e2e8eb;background:#fff;display:flex;flex-direction:column;min-width:0;transition:box-shadow .2s,transform .2s}.article-card:hover{box-shadow:0 18px 44px rgba(27,48,68,.09);transform:translateY(-3px)}.card-image{display:block;overflow:hidden;background:#17334d}.card-image img{width:100%;aspect-ratio:1.6;object-fit:cover;transition:transform .4s}.article-card:hover .card-image img{transform:scale(1.04)}.card-content{padding:23px 24px 25px;display:flex;flex-direction:column;flex:1}.eyebrow{display:flex;justify-content:space-between;gap:12px;align-items:center;color:#64798a;font-size:11px;font-weight:700;letter-spacing:.07em}.eyebrow span{color:#38798a}.eyebrow time{white-space:nowrap;font-variant-numeric:tabular-nums}.article-card h3{font-size:20px;letter-spacing:-.045em;margin:15px 0 13px;line-height:1.45}.article-card h3 a:hover{color:#1e6a7e}.article-card p{font-size:13px;color:#607082;line-height:1.8;margin:0 0 18px}.text-link{display:inline-flex;align-items:center;gap:10px;color:#245f73;font-weight:750;font-size:12px;margin-top:auto}.text-link span{font-size:17px}.text-link:hover{color:#0d3548}
.matrix-section{background:#13263c;color:#fff}.section-heading.light .section-label{color:#8ed9db}.section-heading.light p{color:#aabfca}.matrix-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:1px;background:#456078;border:1px solid #456078}.matrix-card{display:block;background:#19314a;padding:21px;transition:background .2s}.matrix-card:hover{background:#23435d}.matrix-card-top{display:flex;justify-content:space-between;align-items:center;color:#92b4bf;font-size:10px;letter-spacing:.16em}.matrix-card-top span:last-child{font-size:19px}.matrix-card img{margin:23px 0 20px;width:100%;height:130px;object-fit:cover;filter:saturate(.8)}.matrix-card h3{font-size:21px;margin:0 0 8px}.matrix-card p{font-size:12px;line-height:1.7;color:#b4c5d0;margin:0}.editorial-grid{display:grid;grid-template-columns:.7fr 1.3fr;gap:90px}.editorial-grid>div:first-child>p{font-size:14px;color:var(--muted);max-width:300px;margin:20px 0 29px}.brief-list{border-top:1px solid var(--line)}.brief-row{display:grid;grid-template-columns:45px 1fr 22px;gap:17px;padding:23px 0;border-bottom:1px solid var(--line);align-items:start}.brief-row>span{font-size:13px;color:#387688}.brief-row strong{font-size:17px}.brief-row p{color:#657384;font-size:12px;margin:8px 0 0}.brief-row b{font-size:18px;color:#4a8390;font-weight:400}.brief-row:hover strong{color:#277184}.applications{background:#fff}.application-grid{border-top:1px solid #cfdce2;display:grid;grid-template-columns:repeat(4,1fr);gap:0;margin-bottom:28px}.app-item{padding:22px 25px 10px;border-right:1px solid #d9e3e8}.app-item:first-child{padding-left:0}.app-item:last-child{border-right:0}.app-item span{font-size:11px;color:#4a8590;font-weight:800}.app-item h3{font-size:17px;margin:27px 0 10px}.app-item p{font-size:12px;color:#647687}.section-action{text-align:center;margin-top:33px}.faq-section{background:#e9f0f1}.faq-grid{display:grid;grid-template-columns:.65fr 1.35fr;gap:85px}.faq-grid>div:first-child p{font-size:14px;color:#5f7180;margin-top:17px}.faq-list{border-top:1px solid #bacdd2}.faq-list details{border-bottom:1px solid #bacdd2}.faq-list summary{list-style:none;cursor:pointer;padding:19px 0;display:flex;justify-content:space-between;gap:20px;font-size:15px;font-weight:700}.faq-list summary::-webkit-details-marker{display:none}.faq-list summary span{font-size:20px;color:#3a7380;font-weight:400}.faq-list details[open] summary span{transform:rotate(45deg)}.faq-list details p{font-size:13px;color:#546978;margin:0 0 20px;max-width:650px}
.site-footer{background:#0b1726;color:#dae6eb;padding:62px 0 0}.footer-grid{display:grid;grid-template-columns:2fr 1fr 1fr;gap:70px;padding-bottom:58px}.footer-brand{font-size:23px;font-weight:800;letter-spacing:-.06em}.footer-brand span{font-size:13px;font-weight:500;letter-spacing:0;margin-left:6px}.footer-grid p{color:#91a7b4;font-size:12px;max-width:340px;margin:18px 0 0}.footer-grid h2{font-size:12px;letter-spacing:.13em;color:#8fcdd3;margin:4px 0 18px}.footer-grid>div:not(:first-child) a{display:block;color:#c2d3dc;font-size:12px;margin-bottom:10px}.footer-grid a:hover{color:#fff}.footer-bottom{border-top:1px solid #304457;display:flex;justify-content:space-between;gap:20px;color:#7f95a4;padding:17px 0;font-size:10px}
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.article-top{background:#0f2237;color:#fff;padding:29px 0 57px}.breadcrumbs{color:#9db8c7;font-size:11px;display:flex;flex-wrap:wrap;gap:10px}.breadcrumbs a:hover{color:#fff}.breadcrumbs span[aria-current]{color:#dbe8ec}.article-kicker{color:#8dd7db;font-size:11px;font-weight:800;letter-spacing:.17em;margin-top:65px}.article-kicker span{margin:0 8px}.article-top h1{font-size:clamp(34px,4.2vw,57px);letter-spacing:-.055em;max-width:980px;margin:15px 0 18px}.article-lead{font-size:18px;color:#c4d6df;max-width:820px;margin:0}.article-meta{display:flex;gap:22px;flex-wrap:wrap;color:#9bb3c0;font-size:11px;margin-top:28px}.article-layout{display:grid;grid-template-columns:minmax(0,760px) 1fr;gap:80px;padding-top:54px;padding-bottom:90px;align-items:start}.article-cover{margin:0 0 45px}.article-cover img{width:100%;height:auto;aspect-ratio:1.6;object-fit:cover}.article-body{min-width:0}.article-body p{font-family:var(--serif);font-size:16px;line-height:2.05;color:#344354;letter-spacing:.012em}.article-body .opening{font-size:18px;line-height:2;color:#233b4d;padding-bottom:29px;border-bottom:1px solid var(--line)}.article-body section{padding-top:18px}.article-body h2{font-size:25px;letter-spacing:-.04em;margin:22px 0 14px;padding-left:16px;border-left:3px solid #3c9ba7}.article-body .sources{border-top:1px solid var(--line);margin-top:45px;padding-top:25px}.article-body .sources p{font-size:13px;font-family:var(--sans);color:#677888}.sources ol{padding-left:20px}.sources li{font-size:13px;margin:10px 0;line-height:1.7}.sources a{color:#2c6e80;text-decoration:underline;text-underline-offset:3px;overflow-wrap:anywhere}.article-endnote{border-left:3px solid #b7d8dd;background:#f0f6f6;color:#586d78;padding:16px 20px;font-size:12px;line-height:1.8;margin-top:36px}.article-aside{position:sticky;top:30px}.toc{border-top:2px solid #1b5265;padding-top:20px;display:flex;flex-direction:column;max-height:calc(100vh - 60px);overflow:auto}.toc>span,.aside-note span{font-size:11px;font-weight:800;color:#457786;letter-spacing:.14em;margin-bottom:12px}.toc a{font-size:12px;color:#607182;line-height:1.5;padding:9px 0;border-bottom:1px solid #e5ecef}.toc a:hover{color:#17677a}.aside-note{margin-top:28px;background:#eef4f4;padding:23px}.aside-note p{font-size:12px;color:#647784;margin:0}.related-section{background:#f4f7f8;padding:60px 0 80px}.related-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:1px;background:#dce7eb;border:1px solid #dce7eb}.related-grid a{display:grid;grid-template-columns:1fr 22px;gap:3px 20px;background:#fff;padding:22px;transition:background .2s}.related-grid a:hover{background:#edf6f6}.related-grid a span{grid-column:1;font-size:10px;color:#388093}.related-grid a strong{grid-column:1;font-size:15px;line-height:1.5}.related-grid a b{grid-column:2;grid-row:1/3;color:#4b8591;font-weight:400}.not-found{min-height:55vh;display:flex;align-items:center;padding:80px 0}.not-found span{color:#3f7d8a;font-size:12px;letter-spacing:.15em}.not-found h1{font-size:50px;margin:12px 0}.not-found p{color:#647686}.not-found .btn{margin-right:10px;margin-top:20px}