*{box-sizing:border-box}body{margin:0;background:#FAF8F3;color:#121E36;font-family:var(--font-sans);font-size:16px;line-height:1.75;-webkit-font-smoothing:antialiased}
a{color:inherit;text-decoration:none}button{font:inherit;cursor:pointer}h1,h2,h3,p,figure{margin:0}html{scroll-behavior:smooth}[lang="zh-CN"]{line-height:1.85}.bi{display:inline-grid}.bi>[lang]{grid-area:1/1}
.svg-defs{position:absolute;width:0;height:0;overflow:hidden}
.site-header{height:54px!important;padding:0 36px 0 22px!important;border-radius:20px!important;justify-content:flex-start!important;gap:28px!important;box-shadow:0 3px 16px #0a143209!important}
.site-header .brand img{height:38px!important}.site-header .nav-links{margin-left:auto;gap:28px!important}.site-header .header-actions{gap:22px!important}.site-header .lang-switch{background:transparent!important;border:0!important;padding:8px 0!important;border-radius:0!important;font:400 12px var(--font-sans)!important}.site-header .platform-pill{padding:7px 16px!important;box-shadow:none!important}
.shell{max-width:1100px;margin:auto}.page-hero{position:relative;padding:142px 40px 72px;isolation:isolate;border-bottom:1px solid var(--hairline-border)}
.page-hero:before{content:"";position:absolute;inset:0;z-index:-1;background:url('01_hero_perimeter_frame.jpg') center right/cover;opacity:.28;mask-image:linear-gradient(90deg,transparent 38%,#000)}
.breadcrumb{display:flex;flex-wrap:wrap;gap:10px;font-size:13px;color:var(--ink-muted);margin-bottom:38px}.breadcrumb a:hover{color:var(--brand-blue)}
.eyebrow{font-size:11px;font-weight:600;letter-spacing:.12em;text-transform:uppercase;color:var(--brand-blue);margin-bottom:20px}
h1{font-size:clamp(30px,4vw,46px);font-weight:600;letter-spacing:-0.022em;word-spacing:0.06em;line-height:1.12;max-width:22ch}
.overview h1{font-size:clamp(72px,9vw,110px);font-weight:400;letter-spacing:-0.035em}
.lede{max-width:720px;margin-top:28px;font-size:clamp(16px,1.4vw,18px);color:var(--ink-secondary);line-height:1.65}
.resources{display:flex;align-items:center;flex-wrap:wrap;gap:16px 28px;margin-top:32px}.pill{display:inline-flex;gap:12px;align-items:center;border:1px solid #14182424;background:#1418240d;border-radius:999px;padding:12px 24px;font-size:14px;font-weight:600}.pill:hover{background:white}
.unavailable{color:var(--ink-muted);font-size:14px}.unavailable small{display:block;font-size:11px;color:var(--ink-muted)}
.section{padding:72px 40px}.section h2,.article-section h2{font-size:clamp(23px,2.5vw,28px);line-height:1.25;letter-spacing:-0.018em;word-spacing:0.05em;font-weight:600}
.section-intro{max-width:700px;color:var(--ink-secondary);margin-top:20px}.themes{display:grid;grid-template-columns:repeat(3,1fr);gap:24px;margin-top:36px}
.theme{position:relative;display:flex;flex-direction:column;overflow:hidden;border:1px solid var(--hairline-border);border-radius:18px;background:#FAF9F6;transition:border-color .2s,transform .2s}
.theme:first-child{background:#D5E5F5;border-color:#5082b952}.theme:hover{transform:translateY(-3px);border-color:var(--brand-blue)}
.theme-copy{padding:30px 28px}.theme h3{font-size:22px;line-height:1.2;letter-spacing:-0.015em;word-spacing:0.04em;font-weight:600;min-height:3.6em}.theme p{font-size:15px;color:var(--ink-secondary);margin-top:16px}.number{display:block;font-size:13px;color:var(--ink-muted);margin-bottom:20px}
.theme img{width:100%;height:210px;object-fit:cover;margin-top:auto;opacity:.9}.theme .read{font-size:13px;display:block;margin-top:20px;color:var(--brand-blue)}
.figure-slot{margin-top:32px;border:1px solid var(--hairline-border);border-radius:16px;background:#f3f2ed;min-height:220px;display:flex;align-items:center;justify-content:center;text-align:center;padding:32px}
.figure-slot strong{display:block;font-weight:400;font-size:18px;line-height:1.4;color:var(--ink-secondary)}.figure-slot small{display:block;margin-top:16px;font-size:12px;color:var(--ink-muted)}figcaption{font-size:13px;color:var(--ink-muted);margin-top:12px;max-width:800px}
.article-section{scroll-margin-top:105px;margin-bottom:64px}.article-section p{margin-top:24px;color:var(--ink-secondary)}.pending-note{font-size:12px!important;color:var(--ink-muted)!important}
.article-wide{max-width:1100px;margin:0 auto 72px}.related{border-top:1px solid var(--hairline-border)}.related-links{display:flex;gap:32px;flex-wrap:wrap;margin-top:26px}.related-links a{color:var(--brand-blue);font-size:16px}
.draft-label{font-size:11px;color:var(--ink-muted);margin-top:24px}.site-footer a{display:inline-block}a:focus-visible,button:focus-visible{outline:2px solid var(--brand-blue);outline-offset:5px}
@media(max-width:1150px){.article-wide{margin-left:32px;margin-right:32px}.site-header{gap:18px!important}.site-header .nav-links{gap:20px!important}}
@media(max-width:800px){.page-hero{padding:118px 24px 48px}.section{padding:48px 24px}.themes{grid-template-columns:1fr}.theme h3{min-height:0}.theme img{height:220px}.article-wide{margin-left:24px;margin-right:24px}.site-header .header-actions{margin-left:auto}}
@media(max-width:540px){.site-header{padding:0 20px 0 18px!important;gap:12px!important}.site-header .header-actions{gap:16px!important}.breadcrumb{font-size:12px}.resources{gap:16px}.figure-slot{min-height:180px;padding:24px}}
@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}*{transition:none!important}}

/* Research articles: one continuous reading column, with figures aligned to the text. */
.research-article .page-hero .shell{max-width:740px}
.research-article .page-hero{padding-bottom:52px}
.research-article h1{max-width:none;font-size:clamp(30px,3.5vw,44px);line-height:1.2}
.research-article .lede{max-width:none;font-size:17px;line-height:1.75;margin-top:22px}
.article-layout{max-width:1100px;margin:0 auto;padding:56px 40px 0}
.article-layout article{max-width:740px;margin:0 auto}
.research-article .article-section{margin-bottom:44px}
.research-article .article-section h2{font-size:clamp(22px,2.4vw,26px)}
.research-article .article-section p{font-size:16px;line-height:1.8;margin-top:18px}
.research-article .article-section figure{margin:36px 0}
.research-article .related .shell{max-width:740px}
.research-article .article-wide{width:calc(100% - 80px);max-width:740px;margin:0 auto 64px}
.research-article figcaption{margin:14px auto 0}
@media(max-width:800px){.research-article .page-hero{padding-bottom:40px}.article-layout{padding:40px 24px 0}.research-article .article-wide{width:calc(100% - 48px)}.research-article .article-section{margin-bottom:44px}}