@charset "UTF-8";
:root{--green:#173f38;--blue:#29485b;--gold:#c7a66b;--paper:#faf9f6;--pale:#edf3ef;--ink:#213c35;--muted:#738079;--line:#dce2db;--serif:Georgia,'Noto Serif SC','Songti SC','SimSun',serif;--sans:Arial,'Microsoft YaHei','PingFang SC',sans-serif}*{box-sizing:border-box}html{scroll-behavior:smooth;scroll-padding-top:100px}body{margin:0;background:var(--paper);color:var(--ink);font-family:var(--sans);font-size:14px;line-height:1.8}a{color:inherit;text-decoration:none}button,input{font:inherit}button,a,input,summary{touch-action:manipulation}button{cursor:pointer}a,button{transition:color .2s,background .2s,transform .2s}a:hover{color:#9a783e}a:focus-visible,button:focus-visible,input:focus-visible,summary:focus-visible{outline:3px solid var(--gold);outline-offset:5px}img{display:block;width:100%;object-fit:cover}h1,h2,h3,h4,p{margin:0}h1,h2,h3{line-height:1.5}h1,h2{font-family:var(--serif);font-weight:500}h2{font-size:34px;letter-spacing:-1px}h3{font-size:19px;font-weight:500}p{color:#64736b}small{font-size:11px}.wrap{width:min(1280px,calc(100% - 104px));margin:auto}.topline{background:var(--green);color:#cfddd4;font-size:10px;letter-spacing:1.4px}.topline .wrap{display:flex;align-items:center;justify-content:space-between;min-height:29px}.topline span:first-child{display:flex;align-items:center;gap:8px}.dot{width:5px;height:5px;background:var(--gold);border-radius:100%;display:inline-block}.site-header{background:rgba(250,249,246,.97);position:sticky;top:0;z-index:30;border-bottom:1px solid var(--line)}.header-inner{height:94px;display:flex;align-items:center;justify-content:space-between;gap:32px}.brand{display:flex;gap:12px;align-items:center;flex-shrink:0}.brandmark{width:36px;height:42px;border:1px solid var(--green);position:relative;display:grid;place-items:center;font:22px var(--serif);font-style:italic}.brandmark:after{content:'';position:absolute;right:-4px;top:5px;width:9px;height:30px;background:var(--paper);border-left:2px solid var(--gold);transform:rotate(25deg)}.brand strong{font-size:21px;letter-spacing:.5px}.brand small{display:block;font-size:8px;letter-spacing:2.3px;line-height:1.5;color:var(--muted)}.desktop-nav{display:flex;gap:26px;align-items:center}.desktop-nav a{font-size:13px;white-space:nowrap;position:relative;line-height:94px}.desktop-nav a[aria-current=page]:after{content:'';height:2px;background:var(--gold);position:absolute;bottom:22px;left:0;right:0}.nav-brand{position:absolute;width:1px;height:1px;overflow:hidden;clip-path:inset(50%)}.nav-action{border:1px solid #b8c6bc;padding:8px 13px!important;line-height:1.5!important;font-size:11px!important}.menu-toggle{display:none;background:none;border:1px solid var(--line);padding:6px 12px;color:var(--green)}.eyebrow{display:block;font-size:10px;font-weight:500;letter-spacing:2.5px;color:#8d784d;text-transform:uppercase;margin-bottom:12px}.section{padding:84px 0;border-bottom:1px solid var(--line)}.section-head{display:flex;justify-content:space-between;align-items:flex-end;gap:30px;margin-bottom:36px}.section-head p{margin-top:9px;font-size:13px}.text-link{display:inline-flex;align-items:center;gap:24px;font-size:12px;border-bottom:1px solid #b9c6bd;padding-bottom:7px;white-space:nowrap}.arrow{font:21px Georgia}.btn{display:inline-flex;align-items:center;justify-content:space-between;gap:25px;background:var(--green);color:#fff;padding:13px 20px;border:1px solid var(--green);font-size:12px}.btn:hover{background:#26584b;color:white}.btn.light{background:transparent;color:var(--green);border-color:#bdcbbf}.meta{display:flex;gap:14px;align-items:center;color:var(--muted);font-size:10px;letter-spacing:.6px}.tag{display:inline-block;font-size:10px;padding:3px 10px;background:var(--pale);color:var(--green)}.section-number{font:12px Georgia;color:#9b9e88}.notice{font-size:11px;line-height:1.9;color:#7a8278;border-left:2px solid var(--gold);padding:8px 15px;background:#f3f1e9}.site-footer{background:var(--green);color:#dce5dc;padding:60px 0 24px}.footer-top{display:grid;grid-template-columns:1.3fr 2fr;gap:90px;padding-bottom:35px}.site-footer p{color:#9fb4a8;font-size:12px;margin-top:18px;max-width:360px}.footer-nav{display:grid;grid-template-columns:repeat(3,1fr);gap:20px;font-size:12px}.footer-nav a{color:#dce5dc}.footer-bottom{padding-top:23px;border-top:1px solid #37574b;color:#91aa9a;font-size:10px;display:flex;justify-content:space-between;gap:30px}.footer-disclosure{color:#a5b8ab;font-size:10px;line-height:1.9;padding-top:20px}.back-top{position:fixed;bottom:24px;right:22px;width:40px;height:40px;background:var(--paper);border:1px solid var(--line);color:var(--green);z-index:20;font-size:18px}.breadcrumbs{font-size:11px;color:var(--muted);margin-bottom:32px}.breadcrumbs a{border-bottom:1px solid var(--line)}.page-intro{padding:42px 0 55px}.page-intro h1{font-size:44px;max-width:850px;margin-bottom:20px}.page-intro .lede{max-width:720px;font-size:15px;line-height:2}.page-banner{height:270px;position:relative;overflow:hidden}.page-banner img{height:100%}.page-banner:after{content:'';position:absolute;inset:0;background:linear-gradient(90deg,rgba(10,40,30,.45),transparent)}.page-banner .banner-label{position:absolute;left:32px;bottom:26px;z-index:1;color:#fff;font:italic 25px Georgia}.page-layout{display:grid;grid-template-columns:230px 1fr;gap:64px}.page-sidebar{border-top:2px solid var(--green);padding-top:20px}.page-sidebar h2{font-size:19px;margin-bottom:18px}.page-sidebar p{font-size:12px}.page-sidebar a{display:block;padding:12px 0;border-bottom:1px solid var(--line);font-size:12px}.article-list{display:grid;gap:25px}.research-article{border-top:1px solid var(--line);padding:28px 0;scroll-margin-top:120px}.article-preview{display:grid;grid-template-columns:1fr 180px;gap:30px}.article-preview img{height:126px}.research-article h2{font:500 23px/1.6 var(--sans);margin:10px 0 14px;letter-spacing:0}.research-article .abstract{font-size:13px;line-height:2}.research-article details{margin-top:18px}.research-article summary{display:list-item;cursor:pointer;color:var(--green);font-size:12px;width:max-content;padding:5px 0;border-bottom:1px solid #acbbae}.article-body{max-width:780px;padding:26px 0 8px;color:#495c51;font-size:15px;line-height:2.15}.article-body h3{font-size:19px;margin:22px 0 9px}.article-body p{color:#495c51;margin:0 0 15px}.sources{border-top:1px solid var(--line);margin-top:24px;padding-top:18px;font-size:12px}.sources ol{padding-left:20px}.sources a{border-bottom:1px solid #c8d3c9;overflow-wrap:anywhere}.related{background:var(--pale);padding:20px;margin-top:20px;font-size:12px}.related a{display:block;margin-top:8px}.close-article{margin-top:20px;background:transparent;border:1px solid var(--line);padding:8px 18px;color:var(--green)}.no-results{padding:40px;color:var(--muted)}[hidden]{display:none!important}.filter-bar{display:flex;gap:10px;flex-wrap:wrap;margin-bottom:30px}.filter-bar button{padding:10px 24px;background:transparent;color:var(--green);border:1px solid var(--line);font-size:12px}.filter-bar button.active{background:var(--green);border-color:var(--green);color:#fff}.method-strip{display:grid;grid-template-columns:repeat(4,1fr);border:1px solid var(--line);margin:30px 0 55px}.method-strip>div{padding:25px;border-right:1px solid var(--line)}.method-strip strong{font-size:14px;display:block;margin:7px 0}.method-strip p{font-size:12px}.finance-glossary{display:grid;grid-template-columns:repeat(3,1fr);gap:1px;background:var(--line);border:1px solid var(--line);margin:30px 0 50px}.finance-glossary div{background:var(--paper);padding:24px}.finance-glossary strong{font:24px Georgia;display:block}.finance-glossary p{font-size:12px;margin-top:7px}.model-flow{display:flex;justify-content:space-between;gap:20px;padding:30px 0;border-top:1px solid var(--line);border-bottom:1px solid var(--line);margin:30px 0 45px}.model-flow div{font-size:13px}.model-flow span{display:block;font:italic 29px Georgia;color:var(--gold);margin-bottom:8px}.knowledge-actions{display:grid;grid-template-columns:1fr 1fr;gap:20px;margin:28px 0 45px}.knowledge-actions a{border:1px solid var(--line);padding:26px;background:var(--pale)}.knowledge-actions h2{font-size:24px;margin-bottom:10px}.news-layout .research-article{border-top:2px solid var(--green)}.news-layout .article-preview{grid-template-columns:1fr 280px}.news-layout .article-preview img{height:195px}.news-layout h2{font-family:var(--serif);font-size:28px}.skip-link{position:absolute;left:10px;top:-80px;background:#fff;padding:10px;z-index:50}.skip-link:focus{top:10px}@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}*{transition:none!important}}
/* Keep the complete column brand visible, including on small screens. */
.desktop-nav a{display:flex;flex-direction:column;justify-content:center;height:94px;line-height:1.7}
.desktop-nav .nav-brand{position:static;display:block;width:auto;height:auto;overflow:visible;clip-path:none;font-size:7px;line-height:1.6;letter-spacing:.5px;color:var(--muted)}
.desktop-nav a.nav-action{height:auto;display:inline-flex;flex-direction:row}
@media(max-width:850px){.desktop-nav a{height:50px;flex-direction:row;justify-content:flex-start;align-items:center;gap:10px}.desktop-nav .nav-brand{font-size:9px}}