/* FDEPE editorial system. Layout inspired by openai.com; original content and identity.
   Radius: 12px art panels, 8px fields, pill buttons. Layers: header 10, menu 20, toast 30. */
:root{color-scheme:light dark;--paper:#fafaf8;--ink:#20211f;--muted:#646660;--line:#dcded7;--soft:#eeefea;--accent:#244f3d;--button:#20211f;--button-text:#fafaf8;--error:#a52b25;--max:1280px;font-family:"Helvetica Neue",Arial,"PingFang SC","Hiragino Sans GB","Microsoft YaHei",sans-serif;font-synthesis:none}
*{box-sizing:border-box}html{scroll-behavior:smooth;scroll-padding-top:100px}body{margin:0;background:var(--paper);color:var(--ink);line-height:1.6;-webkit-font-smoothing:antialiased}button,input,select{font:inherit}button,a,input,select{-webkit-tap-highlight-color:transparent}button,a{touch-action:manipulation}a{color:inherit;text-decoration:none}button{cursor:pointer}button:disabled{cursor:wait;opacity:.65}a:focus-visible,button:focus-visible,input:focus-visible,select:focus-visible,summary:focus-visible{outline:2px solid var(--accent);outline-offset:5px}button:active,.button:active{transform:translateY(1px)}[hidden]{display:none!important}.skip{position:fixed;top:-100px;left:20px;padding:10px;background:var(--ink);color:var(--paper);z-index:40}.skip:focus{top:12px}.header{height:84px;max-width:1600px;padding:0 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24px;border-radius:8px;width:100%;text-align:center;margin-bottom:24px;min-height:48px}.empty{text-align:center;padding:100px 24px;grid-column:1/-1}.empty h1{font-size:36px;font-weight:500}.empty p{color:var(--muted);margin-bottom:28px}.skeleton{min-height:360px;display:grid;gap:20px;background:var(--soft);border-radius:12px;padding:50px}.skeleton span{height:24px;max-width:60%;background:var(--line);border-radius:6px}.skeleton span:first-child{height:60px;max-width:80%}.article-shell{max-width:1180px;margin:auto;padding:50px 48px 80px}.back{font-size:13px;display:inline-block;min-height:44px;margin-bottom:40px}.article-head{max-width:900px;margin:0 auto 60px}.article-head h1{font-size:clamp(30px,3.7vw,48px);line-height:1.45;letter-spacing:-1.3px;font-weight:500;margin:0 0 30px;text-wrap:pretty}.article-deck{font-size:19px;line-height:1.9;color:var(--muted);margin:0 0 30px}.article-byline{display:flex;flex-wrap:wrap;align-items:center;gap:12px 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0}.manifesto-intro>p:last-child{font-size:20px;color:var(--muted)}.manifesto-body{max-width:720px;margin:0 auto 100px;padding:0 24px}.manifesto-body .button{margin-top:32px}.toast{position:fixed;bottom:24px;left:50%;transform:translateX(-50%);background:var(--ink);color:var(--paper);padding:12px 24px;max-width:calc(100% - 32px);border-radius:8px;font-size:14px;z-index:30}
@media(prefers-color-scheme:dark){:root{--paper:#191a18;--ink:#efefea;--muted:#acaea6;--line:#40433b;--soft:#252722;--accent:#a8ccba;--button:#e8ebe3;--button-text:#1b201a;--error:#ffa79d}}
@media(max-width:1100px){.header{padding:0 30px}.desktop-nav{gap:22px;margin-left:14px}.section{padding-left:30px;padding-right:30px}.feature{gap:36px}.feature h3{font-size:27px}.method{margin-left:30px;margin-right:30px;gap:50px}.subscribe{gap:40px}.input-action{flex-direction:column;align-items:stretch}.input-action .button{align-self:flex-start}.reading-layout{gap:30px;grid-template-columns:140px minmax(0,720px)}}
@media(max-width:767px){.header{height:72px;padding:0 20px;gap:16px}.wordmark{font-size:25px}.desktop-nav{display:none}.menu-toggle{display:block}.header-actions .button.small{padding:8px 14px;gap:8px;font-size:12px;min-height:40px}.header-actions{gap:10px}.section{padding-left:22px;padding-right:22px}.intro{padding:52px 22px 56px;text-align:left}.intro h1{font-size:34px;letter-spacing:-1.2px;margin-bottom:22px;max-width:340px}.intro p{font-size:15px;line-height:1.9;margin-bottom:16px}.section-heading{margin-bottom:22px;gap:12px}.section-heading h2{font-size:23px}.section-heading .text-link{font-size:12px}.feature{display:flex;flex-direction:column;align-items:stretch;gap:0;margin-bottom:35px}.feature .cover{aspect-ratio:1.5}.feature-copy{padding:24px 0 0}.feature h3{font-size:25px;line-height:1.5;letter-spacing:-.6px;margin:14px 0 16px}.feature p.excerpt{font-size:15px;line-height:1.8;margin:0 0 12px}.story-grid{grid-template-columns:1fr;gap:30px}.story-card>a{display:grid;grid-template-columns:100px minmax(0,1fr);column-gap:18px;align-items:start}.story-card .cover{aspect-ratio:1;margin:0;border-radius:8px;grid-row:1/4}.story-card h3{font-size:17px;line-height:1.55;margin:0}.story-card .meta{font-size:11px;gap:8px;margin:10px 0 0;line-height:1.7}.story-card .meta span:first-child{display:none}.method{display:block;margin:64px 22px 0;padding:32px 24px;border-radius:12px}.method h2{font-size:28px;line-height:1.45;margin-bottom:20px}.method p{font-size:15px}.method dl{margin-top:30px}.method dl div+div{margin-top:22px}.method dd{font-size:14px}.method dt{font-size:17px}.research-section{padding-top:62px;padding-bottom:0}.deep-grid{display:grid;grid-template-columns:1fr;gap:34px}.deep-grid .story-card>a{display:block}.deep-grid .story-card .cover{aspect-ratio:1.8;margin:0 0 18px}.deep-grid .story-card h3{font-size:22px}.deep-grid .story-card .meta span:first-child{display:inline}.subscribe{display:block;margin-top:58px;padding-top:40px;padding-bottom:50px}.subscribe h2{font-size:32px;margin-bottom:20px}.subscribe form{margin-top:32px}.input-action{flex-direction:row;gap:8px}.input-action .button{padding:13px 15px;gap:8px;align-self:stretch;font-size:13px}.input-action input{padding:12px;font-size:16px}.footer{display:block;padding:36px 22px}.footer p{text-align:left;font-size:12px;margin:12px 0 24px}.footer>div{gap:24px;flex-wrap:wrap;margin-bottom:26px}.footer small{text-align:left}.archive-intro{padding-top:44px;padding-bottom:30px}.archive-intro h1{font-size:38px;letter-spacing:-1.2px}.archive-intro>p{font-size:15px}.search-form{margin-top:26px}.filterbar{margin-right:-22px;padding-right:22px;gap:7px}.filterbar button{padding:8px 15px;font-size:13px}.archive-meta{margin-top:0;margin-bottom:24px}.archive{padding-bottom:60px}.archive .story-grid{gap:32px}.article-shell{padding:30px 22px 50px}.back{margin-bottom:20px}.article-head{margin-bottom:30px}.article-head h1{font-size:29px;letter-spacing:-.7px;line-height:1.5;margin-bottom:24px}.article-deck{font-size:16px;line-height:1.9;margin-bottom:24px}.article-byline{gap:8px 14px;font-size:11px}.share-button{font-size:12px;margin:5px 0 0}.reading-layout{display:block}.toc{position:static;background:var(--soft);padding:18px 20px;border-radius:8px;margin-bottom:32px}.toc summary{margin-bottom:0;min-height:28px}.toc details[open] summary{margin-bottom:10px}.toc nav{display:flex;gap:4px 20px;flex-wrap:wrap}.toc a{padding:4px 0}.prose{font-size:16px;line-height:1.95}.prose .lede{font-size:19px}.prose h2{font-size:24px;margin:36px 0 20px}.prose .source{padding:16px;font-size:12px}.stat-row{padding:20px;gap:20px}.article-end{margin-top:46px}.article-end p{font-size:15px}.manifesto-intro{padding-top:46px;padding-bottom:34px}.manifesto-intro .meta{font-size:11px}.manifesto-intro h1{font-size:36px;letter-spacing:-1px}.manifesto-intro>p:last-child{font-size:16px}.manifesto-body{padding:0 22px;margin-bottom:60px}.empty{padding:70px 20px}.empty h1{font-size:29px}.skeleton{min-height:300px;padding:30px}}
@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}*,*::before,*::after{animation:none!important;transition:none!important}}

.services{padding-top:50px}.services-intro{font-size:16px;color:var(--muted);max-width:680px;margin-bottom:30px}.service-options{display:grid;grid-template-columns:1fr;gap:0}.service-options details{border-bottom:1px solid var(--line);padding:20px 0}.service-options summary{display:flex;align-items:center;justify-content:space-between;gap:20px;cursor:pointer;min-height:44px;font-size:18px}.service-options strong{font-size:15px;font-weight:500}.service-options p{font-size:14px;color:var(--muted);max-width:680px}.service-options summary:after{content:'+';font-size:20px;margin-left:4px}.service-options details[open] summary:after{content:'−'}.service-options summary span{margin-right:auto}@media(max-width:767px){.services{padding-top:56px}.service-options summary{font-size:16px}.service-options strong{font-size:13px}.services-intro{font-size:14px}}
/* Native language navigation and right-to-left reading. */
.language-switch{position:relative;font-size:14px}.language-switch summary{cursor:pointer;min-height:44px;display:flex;align-items:center;gap:8px;white-space:nowrap}.language-switch summary:after{content:'⌄'}.language-switch summary::-webkit-details-marker{display:none}.language-switch ul{position:absolute;z-index:40;inset-inline-end:0;top:100%;min-width:180px;list-style:none;margin:0;padding:8px;background:#fff;border:1px solid #deded8;box-shadow:0 12px 32px #00000010}.language-switch a{display:flex;align-items:center;min-height:44px;padding:6px 16px;border-radius:3px}.language-switch a:hover,.language-switch a[aria-current]{background:#f0f0eb}.header-actions{gap:22px}.translation-note{font-size:14px;line-height:1.7;color:#60605b;max-width:760px;margin-block:20px 10px}.translation-note a,.machine-link{text-decoration:underline;text-underline-offset:4px}.machine-link{font-size:13px;color:#60605b}.intro h1{max-width:1050px;overflow-wrap:break-word}.intro p{white-space:pre-line}.article-head h1{overflow-wrap:anywhere}.story-card h3{overflow-wrap:anywhere}[dir=rtl] .prose,[dir=rtl] .toc,[dir=rtl] .feature-copy{text-align:right}[dir=rtl] .prose ul{padding-right:1.3em;padding-left:0}[dir=rtl] .prose blockquote{border-left:0;border-right:2px solid #222;padding-left:0;padding-right:1.5rem}[dir=rtl] .toc{border-left:0;border-right:1px solid #deded8;padding-left:0;padding-right:20px}[dir=rtl] .search-form input{text-align:right}[dir=rtl] body{letter-spacing:0}html[lang=ar] h1,html[lang=ar] h2,html[lang=ar] h3{letter-spacing:0;line-height:1.35}@media(max-width:767px){.header-actions{gap:14px}.header-actions>.button{display:none}.language-switch{font-size:13px}.intro h1{font-size:clamp(38px,10vw,58px)}.article-head h1{font-size:clamp(32px,9vw,48px)}.translation-note{font-size:13px}.desktop-nav{display:none}.header{gap:12px}}@media(prefers-reduced-motion:reduce){*{scroll-behavior:auto!important}}
.prose .source{font-size:12px;line-height:1.7;color:#72726c;margin-block:10px 18px;overflow-wrap:anywhere}.prose .source a{color:inherit;text-decoration:none;border-bottom:1px solid #deded8;padding-block:3px}.prose .source a:hover{color:#242421;border-bottom-color:currentColor}.prose .source a:focus-visible{outline:2px solid #505b38;outline-offset:5px;color:#242421}.prose .source a span{font-size:10px;margin-inline-start:3px}
.intro h1,.article-head h1,.manifesto-intro h1{text-wrap:balance}
.prose .source{background:transparent;padding:0;border:0;border-radius:0;margin-block:6px 10px}
.language-switch ul{background:var(--paper);border-color:var(--line)}.language-switch a:hover,.language-switch a[aria-current]{background:var(--soft)}.translation-note,.machine-link,.prose .source{color:var(--muted)}.prose .source a{border-bottom-color:var(--line)}.prose .source a:hover,.prose .source a:focus-visible{color:var(--ink)}.prose .source a:focus-visible{outline-color:var(--accent)}