:root{--navy:#142b3a;--ink:#243d49;--paper:#faf8f2;--gold:#b69a67;--line:#dddcd2;--muted:#63716f}*{box-sizing:border-box}html{scroll-behavior:smooth;scroll-padding-top:100px}body{margin:0;color:var(--ink);background:var(--paper);font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Microsoft YaHei",sans-serif;line-height:1.85}a{color:inherit;text-underline-offset:5px}a:hover{color:#92723d}button{font:inherit;cursor:pointer}.skip{position:absolute;top:-100px}.skip:focus{top:10px;background:white;padding:10px;z-index:50}.sitehead{display:flex;justify-content:space-between;align-items:center;padding:20px 5vw;border-bottom:1px solid var(--line);gap:20px}.brand{text-decoration:none;display:flex;align-items:center;gap:14px;line-height:1.4}.brand b{font:600 28px Georgia,serif;letter-spacing:2px;border-right:1px solid var(--gold);padding-right:14px}.brand span{font-size:12px;letter-spacing:1px}.sitehead nav{display:flex;gap:24px;font-size:13px}.eyebrow{font-size:11px;letter-spacing:3px;color:var(--gold);font-weight:600}.masthead{max-width:1060px;margin:auto;padding:72px 28px 45px}h1,h2,h3{font-family:Georgia,"Songti SC","Noto Serif CJK SC","SimSun",serif;font-weight:500;line-height:1.4}h1{font-size:clamp(34px,4.6vw,62px);letter-spacing:-1px;margin:20px 0}h1 span{display:block}.subtitle{font-size:19px;max-width:750px;color:var(--muted)}.byline{display:flex;align-items:center;gap:12px;margin-top:30px;font-size:12px}.byline img{width:44px;height:44px;border-radius:50%;object-fit:cover}.byline p{margin:0}.byline small{color:var(--muted)}.hero{max-width:1240px;margin:0 auto 50px;padding:0 28px}.hero img{width:100%;height:min(56vw,560px);object-fit:cover;display:block}.hero figcaption,figure figcaption{font-size:11px;color:var(--muted);line-height:1.6;margin-top:10px}.layout{max-width:1120px;margin:auto;display:grid;grid-template-columns:200px minmax(0,760px);gap:65px;padding:0 28px}.toc{position:sticky;top:28px;align-self:start;border-top:2px solid var(--gold);padding-top:16px;font-size:12px}.toc p{letter-spacing:2px;color:var(--muted)}.toc a{display:block;text-decoration:none;padding:10px 0;border-bottom:1px solid var(--line)}.toc a:hover{color:#92723d}.toc .share{display:block;border:0;background:none;padding:18px 0;text-decoration:underline;text-underline-offset:5px;color:var(--muted)}article{min-width:0;font-size:17px}article>p:first-child{font-size:20px;line-height:1.95}article section{padding:42px 0;border-top:1px solid var(--line);scroll-margin-top:24px}article section h2{font-size:32px;margin:10px 0 25px}article h3{font-size:23px;margin:32px 0 12px}article p{margin:0 0 24px}article .num{font:italic 17px Georgia,serif;color:var(--gold)}blockquote{margin:32px 0;padding:28px 30px;border-left:3px solid var(--gold);background:#efeee5;font-family:Georgia,"Songti SC","SimSun",serif;font-size:24px;line-height:1.7}blockquote cite{display:block;font-family:inherit;font-size:12px;font-style:normal;color:var(--muted);margin-top:12px}.chart{background:#fff;border:1px solid var(--line);padding:26px;margin:28px 0}.chart h3{font-family:inherit;font-size:16px;margin:0 0 24px}.barrow{display:grid;grid-template-columns:70px 1fr 60px;gap:10px;align-items:center;font-size:13px;margin:18px 0}.track{height:24px;background:#f1f0e9}.bar{height:100%;background:var(--navy)}.bar.gold{background:var(--gold)}.chart small,.source{font-size:12px;color:var(--muted);line-height:1.7}.metric{font:42px Georgia,serif;color:var(--gold);margin-top:15px}.metric small{font-family:inherit;font-size:15px}.returns{display:grid;grid-template-columns:repeat(3,1fr);gap:12px;margin:32px 0}.return{border-top:2px solid var(--gold);padding:20px 15px;background:#efeee5;font-size:14px}.return em{font:italic 12px Georgia,serif;color:var(--muted)}.return h3{font-size:21px;margin:10px 0}.return p{margin:0}.widephoto{margin:30px 0}.widephoto img{width:100%;height:auto;display:block}.comparison{overflow-x:auto;margin:28px 0}table{border-collapse:collapse;width:100%;font-size:14px;text-align:left}td,th{padding:15px 12px;border-bottom:1px solid var(--line);vertical-align:top}th{font-weight:500;background:#efeee5}.note{background:#efeee5;padding:24px;font-size:14px}.conclusion{background:var(--navy);color:var(--paper);padding:40px;margin:40px 0}.conclusion h2{font-size:32px;margin-top:0}.conclusion .english{font:22px/1.6 Georgia,serif;color:#ddc69b}.button{display:inline-block;background:var(--gold);color:#132a39;padding:12px 22px;text-decoration:none;font-size:14px;border:0}.contact{display:flex;align-items:center;gap:18px;margin:28px 0}.contact img{width:70px;height:70px;object-fit:cover;border-radius:50%}.sources{font-size:13px;overflow-wrap:anywhere}.sources li{margin-bottom:16px}.sources h2{font-size:24px}.sitefoot{margin-top:70px;padding:36px 5vw;border-top:1px solid var(--line);display:flex;justify-content:space-between;font-size:12px;color:var(--muted);gap:20px}.indexintro{max-width:1120px;margin:auto;padding:70px 28px 30px}.indexintro h1{margin-bottom:15px}.indexintro p{max-width:680px;color:var(--muted)}.feature{max-width:1064px;margin:20px auto 90px;display:grid;grid-template-columns:1.1fr 1fr;background:#efeee5;text-decoration:none}.feature img{width:100%;height:100%;min-height:360px;object-fit:cover}.feature .copy{padding:42px}.feature h2{font-size:30px;margin:18px 0}.feature p{font-size:15px;color:var(--muted)}.feature small{font-size:12px;color:var(--muted)}.tag{font-size:10px;letter-spacing:2px;color:var(--gold)}#share-status{font-size:12px;color:var(--muted)}@media(max-width:760px){.sitehead{padding:17px 20px;gap:10px}.brand span{font-size:10px}.brand b{font-size:24px}.sitehead nav{gap:13px;font-size:12px}.sitehead nav .home{display:none}.masthead{padding:45px 23px 30px}h1{font-size:36px}.subtitle{font-size:17px}.hero{padding:0 16px;margin-bottom:28px}.hero img{height:65vw}.layout{display:block;padding:0 23px}.toc{position:static;margin:0 0 32px;font-size:12px;display:flex;flex-wrap:wrap;gap:0 15px}.toc p{width:100%;margin:8px 0}.toc a{width:calc(50% - 8px);padding:9px 0}.toc .share{padding:9px 0}article{font-size:16px}article>p:first-child{font-size:18px}article section{padding:32px 0}article section h2{font-size:28px}.returns{grid-template-columns:1fr}.return{padding:20px}.return h3{display:inline-block;margin:0 0 8px 14px}.return em{display:inline-block}blockquote{font-size:21px;padding:22px}.chart{padding:20px}.conclusion{padding:28px 22px;margin:24px 0}.conclusion h2{font-size:27px}.sitefoot{display:block}.feature{display:block;margin:15px 20px 60px}.feature img{height:250px;min-height:0}.feature .copy{padding:26px}.feature h2{font-size:27px}.indexintro{padding:45px 23px 20px}}@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}}@media print{.toc,.sitehead nav,.share,.button{display:none}.layout{display:block;max-width:850px}.hero img{height:320px}.conclusion{color:#142b3a;background:#eee}a{overflow-wrap:anywhere}}
@media(max-width:760px){.sitehead .brand span{display:none}.sitehead .brand b{border:0;padding:0}.sitehead nav{white-space:nowrap;gap:20px}.masthead h1,.indexintro h1{font-size:30px;line-height:1.5}article section h2{font-size:26px}}

/* Data edition: original chart assets retain their full aspect ratio. */
.datafigure{margin:38px 0;padding:22px;background:#fff;border:1px solid var(--line)}.datafigure .figure-label{font-size:11px;letter-spacing:2px;color:#826a43}.datafigure h3{font-size:21px;margin:10px 0 20px}.datafigure a{display:block}.datafigure img{display:block;width:100%;height:auto}.datafigure figcaption{font-size:12px;line-height:1.85;border-top:1px solid var(--line);padding-top:15px;margin-top:18px}.datafigure figcaption a{display:inline}.zoom-hint{display:inline-block;margin-top:8px;color:#826a43}.author-note{border-top:2px solid var(--gold);padding:22px 0;font-size:14px}.author-note p{margin:10px 0}.note p{margin:10px 0 0}caption{text-align:left;font-size:13px;color:var(--muted);padding:0 0 12px}@media(max-width:760px){.datafigure{padding:14px;margin:30px -7px}.datafigure h3{font-size:20px}.datafigure figcaption{font-size:12px}.toc a{font-size:11px}.byline small{font-size:11px}}