:root{--bg:#0d0f12;--panel:#15181d;--ink:#f0f1f3;--muted:#969ca7;--line:#282c34;--accent:#a6baff;color-scheme:dark}
*{box-sizing:border-box}html{scroll-behavior:smooth;scroll-padding-top:88px}body{margin:0;background:var(--bg);color:var(--ink);font:15px/1.8 "Microsoft YaHei","PingFang SC",sans-serif;-webkit-font-smoothing:antialiased}a{color:inherit;text-decoration:none}button{font:inherit}a:focus-visible,button:focus-visible{outline:2px solid var(--accent);outline-offset:5px}header{height:84px;max-width:1240px;margin:auto;padding:0 32px;display:flex;align-items:center;justify-content:space-between;border-bottom:1px solid #ffffff0e}.brand{display:flex;align-items:center;gap:9px;font-size:15px;letter-spacing:1px;font-weight:600}.brandmark{font-size:29px;color:#e7ebf5;line-height:1}.thin{font-size:11px;color:#a3a8b1;font-weight:400}nav{display:flex;align-items:center;gap:32px;font-size:12px;color:#b1b6c0}nav a:hover{color:white}.nav-cta{background:#e9ebef;color:#14161b!important;padding:7px 15px;border-radius:6px}main{max-width:1240px;margin:auto;padding:0 32px}.hero{padding:91px 0 62px;position:relative}.hero-copy{max-width:870px}.eyebrow{color:#9ea6b5;font-size:11px;letter-spacing:.8px;display:flex;align-items:center;gap:10px}.hero .eyebrow:before{content:"";width:5px;height:5px;border-radius:50%;background:#c0cdf5}.hero h1{font-size:clamp(42px,5.2vw,68px);line-height:1.3;letter-spacing:-2px;font-weight:500;margin:26px 0 22px}.serif{font:inherit;color:#9096a2}.intro{max-width:610px;color:#a2a8b3;font-size:16px;line-height:1.9;margin:0}.actions{display:flex;align-items:center;gap:25px;margin-top:29px;flex-wrap:wrap}.button{display:inline-flex;align-items:center;gap:27px;font-size:12px;font-weight:500;padding:10px 18px;border-radius:6px;transition:background .18s}.primary{background:#edf0f6;color:#14171b}.primary:hover{background:#fff}.text-link{font-size:12px;color:#aab0bb}.text-link:hover{color:white}.hero-note{position:absolute;bottom:66px;right:0;font-size:10px;color:#676e7b;writing-mode:vertical-rl;letter-spacing:1px}.hero-art{display:none}
#case{padding:0 0 75px}.section-head{display:flex;justify-content:space-between;align-items:end;gap:30px;margin-bottom:32px}h2{font-size:36px;line-height:1.4;font-weight:500;letter-spacing:-1px;margin:16px 0 0}.section-head>p{font-size:12px;color:var(--muted);margin:0}.section-head>p span{font-size:10px;color:#777e8b}#case>.section-head{margin-bottom:16px}#case .eyebrow{font-size:10px}#case h2{font-size:14px;letter-spacing:0;margin:0;font-weight:400;color:#858c99}#case .section-head>p{font-size:10px}#case .section-head>p br{display:none}#case .section-head>p span{margin-left:12px}
.case-shell{border:1px solid #353b47;border-radius:11px;overflow:hidden;background:#15191f;box-shadow:0 30px 75px #0005,0 1px 0 #ffffff09 inset}.case-top{height:47px;background:#1a1e25;border-bottom:1px solid #2b313b;padding:0 22px;display:flex;align-items:center;gap:11px;color:#aeb6c5;font-size:11px}.case-top:before{content:"";width:7px;height:7px;border:1px solid #6c778b;border-radius:50%}.case-tag{margin-left:auto;font-size:10px;color:#717c8d}.question{padding:28px 35px 26px;font-size:21px;line-height:1.65;color:#e5e9f2;letter-spacing:-.3px;border-bottom:1px solid #2b313b}.case-grid{display:grid;grid-template-columns:246px minmax(0,1fr)}.steps{padding:16px 12px;border-right:1px solid #2b313b;background:#13171c}.step{width:100%;display:flex;align-items:center;gap:12px;text-align:left;color:#919cac;background:transparent;border:1px solid transparent;padding:14px 12px;border-radius:6px;cursor:pointer;margin:2px 0}.step>span{font:10px monospace;color:#667082}.step>div{font-size:12px}.step small{display:block;font-size:9px;color:#657083;margin-top:2px}.step b{margin-left:auto;font-size:12px;font-weight:400;color:#667791}.step:hover{background:#1b222c}.step.active{background:#232d3b;border-color:#34435a;color:#e2eaff}.step.active>span,.step.active b{color:#acc2f5}.evidence{padding:32px 40px;min-height:330px;position:relative;background:linear-gradient(125deg,#1c243080,transparent 68%)}.evidence .label{font-size:10px;color:#95add9;letter-spacing:.3px}.evidence h3{font-size:22px;line-height:1.55;margin:12px 0 25px;font-weight:500}.evidence dl{margin:0}.evidence dl>div{display:grid;grid-template-columns:112px 1fr;gap:20px;border-bottom:1px solid #2e3643;padding:12px 0;font-size:12px}.evidence dt{color:#78879c}.evidence dd{color:#c4cedc;margin:0}.evidence p{font-size:12px;color:#7f8ea5;max-width:680px}.verdict{margin:24px 0;padding:20px 24px;border:1px solid #44536b;background:#243145;color:#c7d8f8;font-size:22px;border-radius:5px}.case-bottom{padding:12px 23px;font-size:10px;border-top:1px solid #2b313b;color:#78869c;text-align:right}.case-bottom a:hover{color:#d8e4ff}
.capability-strip{display:flex;justify-content:space-between;gap:25px;padding:28px 0;border-bottom:1px solid var(--line);color:#8b939f;font-size:12px}.capability-strip span{display:flex;align-items:center;gap:12px}.capability-strip i{font-style:normal;color:#495361;font-size:10px;font-family:monospace}
#system{padding:70px 0 80px;border-bottom:1px solid var(--line)}.muted{color:#717985}.architecture{margin-top:40px;border:1px solid #282f39;background:#11151b;border-radius:8px;overflow:hidden}.architecture img{display:block;width:100%}.editorial-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:48px;margin-top:38px}.editorial-grid article>span{color:#687586;font-size:10px}.editorial-grid h3{font-size:17px;font-weight:500;margin:12px 0 8px}.editorial-grid p{font-size:12px;line-height:1.95;color:#828c9a;margin:0;max-width:290px}
#research{display:grid;grid-template-columns:1fr 1.4fr;gap:65px;padding:80px 0 90px;border-bottom:1px solid var(--line)}#research .section-head{align-items:start;margin:0}#research h2{font-size:33px}.paper-list>a{display:flex;align-items:center;gap:23px;padding:22px 4px;border-bottom:1px solid var(--line)}.paper-list>a:first-child{padding-top:0}.paper-list>a:hover h3{color:#c0ceef}.paper-n{font:10px monospace;color:#596577}.paper-list h3{font-family:"Segoe UI",sans-serif;font-size:22px;font-weight:500;margin:0}.paper-list h3 span{font:9px "Microsoft YaHei",sans-serif;padding:4px 6px;border:1px solid #353e4e;border-radius:4px;color:#818fa3;vertical-align:middle;margin-left:13px}.paper-list p{font-size:12px;color:#8490a1;margin:7px 0 0}.paper-list b{font-weight:400;color:#6d7e96;margin-left:auto}.release{padding:75px 0 85px;display:grid;grid-template-columns:1fr auto;align-items:center;gap:0 30px}.release>.eyebrow{grid-column:1/-1}.release h2{font-size:44px}.release>p{font-size:11px;color:#727f91;grid-column:1;margin:15px 0}.release>.actions{grid-column:2;grid-row:2/4;margin-top:0}.release-note{font-size:10px!important;color:#7d8ca2!important}.release-note a:hover{color:white}footer{max-width:1176px;margin:auto;padding:26px 0;border-top:1px solid var(--line);display:flex;align-items:center;justify-content:space-between;color:#697585;font-size:10px}footer .brand{font-size:11px;letter-spacing:1px}footer>span{color:#505c6c}
@media(min-width:1500px){.hero{padding-top:110px}.hero h1{font-size:74px}}
@media(max-width:900px){.hero-note{display:none}.hero{padding-top:65px}.case-grid{grid-template-columns:210px 1fr}.evidence{padding:26px}.editorial-grid{gap:23px}#research{grid-template-columns:1fr 1.4fr;gap:30px}.release{display:block}.release>.actions{margin-top:25px}footer{margin:0 32px}}
@media(max-width:640px){header,main{padding-left:20px;padding-right:20px}header{height:70px}.brand{font-size:12px}.thin{font-size:9px}nav{gap:0}nav>a:not(.nav-cta){display:none}.hero{padding:52px 0 40px}.hero h1{font-size:39px;letter-spacing:-1px;margin-top:22px}.intro{font-size:13px;max-width:320px}.actions{gap:20px}.eyebrow{font-size:10px}#case .section-head{display:block}#case .section-head>p{margin-top:9px}.case-top{padding:0 15px;font-size:9px}.case-tag{font-size:8px}.question{padding:22px 20px;font-size:17px}.question br{display:none}.case-grid{grid-template-columns:1fr}.steps{display:grid;grid-template-columns:1fr 1fr;gap:5px;padding:10px;border-right:0;border-bottom:1px solid #2b313b}.step{padding:10px;gap:8px;margin:0}.step>div{font-size:11px}.step small{font-size:8px}.step b{display:none}.evidence{padding:24px 20px;min-height:330px}.evidence h3{font-size:19px}.evidence dl>div{grid-template-columns:73px 1fr;gap:12px;font-size:11px}.verdict{font-size:18px;padding:15px}.capability-strip{display:grid;grid-template-columns:1fr 1fr;gap:16px;font-size:10px}#case{padding-bottom:20px}#system{padding:50px 0}.section-head{display:block}h2{font-size:28px}.architecture{overflow:auto}.architecture img{min-width:670px}.editorial-grid{grid-template-columns:1fr;gap:25px}.editorial-grid p{max-width:none}#research{display:block;padding:50px 0}#research .section-head{margin-bottom:30px}#research h2{font-size:28px}.paper-list h3{font-size:21px}.paper-list p{font-size:11px}.paper-list>a{gap:15px}.release{padding:50px 0}.release h2{font-size:33px}.release>.actions{gap:20px}footer{margin:0 20px;font-size:9px;gap:15px}footer>span{display:none}}
@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}*{transition:none!important}}

/* Readable Chinese typography with local variable-font fallbacks. */
body{font-family:"Segoe UI Variable","Segoe UI","Noto Sans SC","PingFang SC","Microsoft YaHei",sans-serif;font-size:16px;line-height:1.75;font-weight:400;font-kerning:normal;font-variant-numeric:tabular-nums}
.hero h1{font-size:clamp(42px,5vw,64px);font-weight:550;line-height:1.3;letter-spacing:-.025em}.intro{font-size:18px;line-height:1.85;max-width:650px}.eyebrow{font-size:12px;letter-spacing:.025em}.hero-note{writing-mode:horizontal-tb;position:static;margin:23px 0 0;font-size:12px;color:#929cac;letter-spacing:0}
nav,.button,.text-link{font-size:14px}.thin{font-size:12px}.brand{font-size:16px}h2,#research h2{font-size:34px;font-weight:500;line-height:1.4;letter-spacing:-.02em}.release h2{font-size:40px}
#case h2{font-size:16px;color:#adb6c5}#case .section-head>p,#case .section-head>p span,.case-top,.case-tag{font-size:12px;color:#9da9bd}.case-top{height:50px}.question{font-size:23px;line-height:1.6}
.step>div{font-size:14px}.step small{font-size:12px;line-height:1.65;color:#929fb3}.step>span{font-size:12px}.step{gap:10px;padding:13px 10px}.case-grid{grid-template-columns:265px minmax(0,1fr)}
.evidence .label{font-size:12px}.evidence h3{font-size:24px;line-height:1.5}.evidence dl>div{font-size:15px;line-height:1.8;grid-template-columns:112px 1fr}.evidence dt{color:#9ba9bd}.evidence p{font-size:14px;line-height:1.85;color:#9ba9bd}.case-bottom{font-size:12px;color:#a2b0c6}.verdict{font-size:23px}
.capability-strip{font-size:14px}.capability-strip i{font-size:12px;color:#8592a5}.editorial-grid article>span{font-size:12px;color:#96a3b7}.editorial-grid h3{font-size:20px}.editorial-grid p{font-size:15px;line-height:1.85;color:#9ba6b6}
.paper-list h3{font-family:inherit;font-size:24px}.paper-list h3 span{font:12px "Noto Sans SC","Microsoft YaHei",sans-serif;color:#a0adc1}.paper-list p{font-size:14px;line-height:1.8}.paper-n{font-size:12px}.release>p{font-size:13px;color:#9aa7ba}.release-note{font-size:12px!important;color:#a0adc1!important}footer,footer .brand,footer>span{font-size:12px;color:#8e9bae}
@media(min-width:1500px){.hero h1{font-size:68px}}
@media(max-width:900px){.hero-note{display:block}.case-grid{grid-template-columns:235px minmax(0,1fr)}.evidence{padding:27px}}
@media(max-width:640px){body{font-size:15px}.hero h1{font-size:38px;letter-spacing:-.02em;line-height:1.35}.intro{font-size:16px;max-width:100%}.eyebrow{font-size:12px}.hero-note{font-size:12px;max-width:100%}.brand{font-size:14px}.thin{font-size:10px}nav,.button,.text-link{font-size:13px}.case-top{font-size:12px;flex-wrap:wrap;gap:2px 8px;height:auto;min-height:50px;padding:10px 14px}.case-tag{font-size:12px}.question{font-size:19px}.case-grid{grid-template-columns:1fr}.step>div{font-size:13px}.step small{font-size:11px}.step>span{font-size:11px}.evidence{padding:24px 20px}.evidence h3{font-size:21px}.evidence dl>div{font-size:14px;grid-template-columns:78px minmax(0,1fr);gap:10px}.evidence dd{overflow-wrap:anywhere}.evidence p{font-size:14px}.verdict{font-size:19px}.capability-strip{font-size:12px}h2,#research h2{font-size:28px}.paper-list h3{font-size:22px}.paper-list h3 span{font-size:11px}.paper-list p{font-size:13px}.release h2{font-size:32px}footer{font-size:11px}.editorial-grid p{max-width:none}}

/* Historical replay controls and source linkage. */
.replay-toolbar{display:flex;align-items:center;flex-wrap:wrap;gap:12px 18px;padding:15px 22px;border-bottom:1px solid #2b313b;background:#151b24;font-size:12px;color:#9ba9bd}.replay-actions{display:flex;gap:8px}.replay-actions button{border:1px solid #46556c;border-radius:5px;background:#26354b;color:#dce7fc;padding:7px 13px;font-size:12px;cursor:pointer;min-height:35px}.replay-actions button+button{background:transparent;color:#9ba9bd;border-color:#303d50}.replay-actions button:hover{background:#344966}.replay-actions button:active{transform:translateY(1px)}#replay-status{min-width:104px;font-variant-numeric:tabular-nums}#replay-progress{appearance:none;width:90px;height:3px;border:0;border-radius:3px;background:#303a49}#replay-progress::-webkit-progress-bar{background:#303a49}#replay-progress::-webkit-progress-value{background:#adc6f2;transition:width 230ms ease}#replay-progress::-moz-progress-bar{background:#adc6f2}.replay-note{margin-left:auto;color:#8493aa;font-size:11px}.step.visited>span{color:#9eb6df}.step{transition:background 180ms,border-color 180ms,color 180ms}.evidence{min-height:510px}.evidence-links{display:grid;gap:5px}.evidence-row{width:100%;display:grid;grid-template-columns:90px minmax(0,1fr) 12px;align-items:start;gap:14px;text-align:left;padding:12px;border:1px solid transparent;border-bottom-color:#2e3643;border-radius:5px;color:#c4cedc;background:transparent;cursor:pointer;font-size:14px;line-height:1.8;transition:background 180ms,border-color 180ms}.evidence-row>span{color:#97a7bf}.evidence-row strong{font-weight:400}.evidence-row b{font-size:12px;font-weight:400;color:#70829f}.evidence-row:hover{background:#1e2938}.evidence-row.linked{background:#233249;border-color:#46618a}.evidence-row.linked>span,.evidence-row.linked b{color:#b4cdf5}.source-detail{margin-top:22px;padding:18px 20px;background:#111a27;border-left:2px solid #7e9ed4;min-height:150px}.source-label{font-size:11px;color:#9cb7e4}.source-detail p{font-size:14px;color:#c2cfe3;margin:9px 0}.source-inference{font-size:12px;color:#91a2bc;margin-bottom:12px}.source-detail a{font-size:11px;color:#a5bde5}.evidence .verdict{margin:16px 0;font-size:20px;padding:15px 20px}.button,.text-link,.paper-list a{transition:background 180ms,color 180ms,transform 180ms}.button:hover{transform:translateY(-2px)}#system,#research,#release{opacity:1;transform:translateY(0);transition:opacity 400ms ease,transform 400ms ease}.reveal-pending{opacity:0!important;transform:translateY(12px)!important}
@media(max-width:640px){.replay-toolbar{padding:12px 14px;gap:10px 12px}.replay-note{width:100%;margin-left:0;font-size:11px}#replay-progress{width:55px}.evidence{min-height:575px}.evidence-row{grid-template-columns:66px minmax(0,1fr) 10px;gap:9px;font-size:13px;padding:10px}.source-detail{padding:15px}.source-detail p{font-size:13px}.evidence .verdict{font-size:18px;padding:12px 15px}}
@media(prefers-reduced-motion:reduce){*,*::before,*::after{animation:none!important;transition:none!important;scroll-behavior:auto!important}.reveal-pending{opacity:1!important;transform:none!important}.button:hover{transform:none}}

/* Release polish: final case section and readable navigation. */
section[id]{scroll-margin-top:92px}
.case-bottom{display:flex;justify-content:space-between;align-items:center;flex-wrap:wrap;gap:14px 28px}
.case-bottom a{line-height:1.7}
#case{padding-bottom:72px}
a:focus-visible,button:focus-visible{outline:2px solid #adc6f2;outline-offset:5px}
.replay-actions:has(button[hidden]){display:none}
@media(max-width:640px){section[id]{scroll-margin-top:74px}.case-bottom{align-items:flex-start;flex-direction:column;gap:12px}#case{padding-bottom:40px}.source-detail{overflow-wrap:anywhere}}