:root{
  --bg:#090b0e; --surface:#12161a; --surface-2:#181e23; --line:#303941;
  --text:#f3f1eb; --muted:#aeb5ba; --cyan:#52d6e7; --amber:#ffc247;
  --coral:#ff6f61; --green:#67d49f; --code:#0c1115;
}
*{box-sizing:border-box;margin:0;padding:0;letter-spacing:0}
html{scroll-behavior:smooth}
body{background:var(--bg);color:var(--text);font-family:"Segoe UI","Microsoft YaHei",system-ui,sans-serif;line-height:1.65;overflow-x:hidden}
a{color:inherit}
a:focus-visible,button:focus-visible{outline:3px solid var(--amber);outline-offset:3px}
.engine-nav{position:fixed;inset:0 0 auto;z-index:50;height:66px;padding:9px 28px;display:flex;align-items:center;gap:24px;background:rgba(9,11,14,.9);border-bottom:1px solid rgba(255,255,255,.1);backdrop-filter:blur(14px)}
.engine-brand{display:flex;align-items:center;gap:11px;text-decoration:none;line-height:1.05;white-space:nowrap}
.engine-brand>span:last-child{display:flex;flex-direction:column;gap:4px}.engine-brand b{font-size:15px}.engine-brand small{font:700 9px/1 Consolas,monospace;color:var(--muted)}
.brand-mark{display:grid;grid-template-columns:repeat(2,8px);grid-template-rows:repeat(2,8px);gap:3px;width:27px;height:27px;transform:rotate(45deg)}
.brand-mark i{display:block;background:var(--cyan)}.brand-mark i:nth-child(2){background:var(--amber)}.brand-mark i:nth-child(3){background:var(--coral)}.brand-mark i:nth-child(4){background:var(--green)}
.engine-links{margin-left:auto;display:flex;align-items:center;gap:22px}.engine-links a{color:var(--muted);text-decoration:none;font-size:13px;font-weight:700}.engine-links a:hover{color:var(--text)}
.engine-links .nav-home{min-height:36px;display:inline-flex;align-items:center;padding:6px 13px;border:1px solid #4a555e;border-radius:6px;color:var(--text)}
.engine-hero{position:relative;min-height:clamp(570px,78svh,760px);margin-top:66px;display:flex;align-items:center;isolation:isolate;overflow:hidden}
.engine-hero>img{position:absolute;inset:0;width:100%;height:100%;object-fit:cover;object-position:center;z-index:-2}
.hero-shade{position:absolute;inset:0;z-index:-1;background:linear-gradient(90deg,rgba(4,7,9,.97) 0%,rgba(4,7,9,.82) 32%,rgba(4,7,9,.18) 67%,rgba(4,7,9,.24) 100%),linear-gradient(0deg,rgba(9,11,14,.85),transparent 38%)}
.hero-copy{width:min(1180px,100%);margin:0 auto;padding:64px 28px 48px}.eyebrow,.section-label{font:800 11px/1.4 Consolas,monospace;color:var(--cyan)}
.hero-copy h1{max-width:720px;margin-top:18px;font-size:clamp(48px,6.3vw,88px);line-height:1.02;font-weight:900;color:#fff;text-shadow:0 5px 22px #000}
.hero-cn{margin-top:9px;font-size:22px;font-weight:800;color:var(--amber)}
.hero-lead{max-width:600px;margin-top:20px;font-size:18px;line-height:1.9;color:#d6dade;text-shadow:0 2px 9px #000}
.hero-actions{display:flex;gap:12px;flex-wrap:wrap;margin-top:30px}.hero-actions a{min-height:48px;display:inline-flex;align-items:center;justify-content:center;padding:10px 22px;border-radius:6px;text-decoration:none;font-size:14px;font-weight:800}
.primary-action{background:var(--amber);color:#171106;box-shadow:0 10px 24px rgba(255,194,71,.2)}.secondary-action{border:1px solid rgba(255,255,255,.35);background:rgba(8,11,14,.68)}
.hero-actions a:hover{transform:translateY(-2px)}
.hero-specs{display:flex;gap:38px;margin-top:38px}.hero-specs div{display:flex;flex-direction:column}.hero-specs dt{font:800 18px/1.2 Consolas,monospace}.hero-specs dd{margin-top:5px;color:var(--muted);font-size:11px}
.section-inner{width:min(1180px,100%);margin:0 auto;padding:88px 28px}.section-heading{display:grid;grid-template-columns:minmax(0,1.2fr) minmax(280px,.8fr);gap:64px;align-items:end;margin-bottom:42px}
.section-heading h2,.definition-grid h2,.capability-band h2,.api-copy h2,.roadmap-band h2{margin-top:11px;font-size:clamp(30px,3.2vw,46px);line-height:1.25}
.section-heading>p{color:var(--muted);font-size:15px;line-height:1.85}.definition-band{background:#11161a;border-block:1px solid rgba(255,255,255,.08)}
.definition-grid{display:grid;grid-template-columns:minmax(0,1fr) minmax(0,1fr);gap:72px;align-items:start}.definition-copy p{color:#c4cacf;font-size:15px;line-height:1.95}.definition-copy p+p{margin-top:16px}
.runtime-band{background:#0a0d10}.runtime-heading{align-items:center}.runtime-controls{display:flex;justify-content:flex-end;gap:8px}.runtime-controls button{width:42px;height:42px;border:1px solid #46525c;border-radius:6px;background:#151b20;color:var(--text);font:800 17px/1 Consolas,monospace;cursor:pointer}.runtime-controls button:hover{border-color:var(--cyan);color:var(--cyan)}
.runtime-heading>div:first-child>p:last-child{max-width:690px;margin-top:12px;color:var(--muted)}.runtime-layout{display:grid;grid-template-columns:minmax(0,1fr) 220px;gap:24px;align-items:stretch}
.runtime-canvas-wrap{position:relative;aspect-ratio:15/11;min-height:340px;background:#0d1216;border:1px solid #35414a;overflow:hidden}.runtime-canvas-wrap canvas{display:block;width:100%;height:100%}.runtime-status{position:absolute;left:12px;bottom:10px;padding:3px 8px;background:rgba(8,11,14,.8);color:#b9c2c8;font:700 10px/1.5 Consolas,monospace}
.runtime-stats{display:grid;grid-template-columns:1fr 1fr;border:1px solid #35414a;background:#10151a}.runtime-stats>div{min-height:102px;padding:18px;border-bottom:1px solid #303940}.runtime-stats>div:nth-child(odd){border-right:1px solid #303940}.runtime-stats dt{font:800 22px/1.15 Consolas,monospace;color:var(--amber)}.runtime-stats dd{margin-top:7px;color:var(--muted);font-size:11px}.runtime-stats .event-cell{grid-column:1/-1;min-height:145px;border-right:0}.runtime-stats .event-cell dt{font-size:12px;color:var(--cyan)}.runtime-stats .event-cell dd{font:600 11px/1.7 Consolas,monospace;color:#c8cfd4;overflow-wrap:anywhere}
.architecture-band{background:#15191d;border-block:1px solid rgba(255,255,255,.07)}.architecture-flow{display:grid;grid-template-columns:repeat(3,minmax(0,1fr)) 34px minmax(150px,1fr) 34px minmax(220px,1.4fr) 34px minmax(150px,1fr);align-items:stretch;gap:8px}
.architecture-flow>div:not(.flow-arrow){min-height:112px;display:flex;flex-direction:column;justify-content:center;padding:18px;border:1px solid #3a444c;background:#11161a}.architecture-flow b{font:800 13px/1.4 Consolas,monospace}.architecture-flow span{margin-top:7px;color:var(--muted);font-size:10px;line-height:1.5}.flow-source b{color:var(--green)}.flow-core b{color:var(--amber)}.flow-world{border-color:#398a96!important}.flow-world b{color:var(--cyan)}.flow-output b{color:var(--coral)}.flow-arrow{display:flex;align-items:center;justify-content:center;color:#65727c;font-size:22px}
.principles-grid{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:14px;margin-top:42px}.principles-grid article{padding:22px 20px;border-top:2px solid var(--cyan);background:#10151a}.principles-grid article:nth-child(2){border-color:var(--amber)}.principles-grid article:nth-child(3){border-color:var(--coral)}.principles-grid article:nth-child(4){border-color:var(--green)}.principles-grid article>span{font:800 11px/1 Consolas,monospace;color:#75818a}.principles-grid h3{margin-top:12px;font-size:16px}.principles-grid p{margin-top:8px;color:var(--muted);font-size:12.5px;line-height:1.75}
.capability-band{background:#0d1013}.capability-band h2{margin-bottom:36px}.capability-table{border-top:1px solid #3b444c}.table-row{display:grid;grid-template-columns:180px minmax(0,1fr) minmax(0,.9fr);border-bottom:1px solid #30383f}.table-row>*{padding:18px 16px}.table-row>*+*{border-left:1px solid #30383f}.table-row b{font:800 13px/1.5 Consolas,monospace;color:var(--cyan)}.table-row span{color:#bdc4c9;font-size:13px}.table-head span{color:#717d86;font:800 10px/1.4 Consolas,monospace}
.api-band{background:#151b20;border-block:1px solid rgba(255,255,255,.08)}.api-layout{display:grid;grid-template-columns:minmax(0,.8fr) minmax(520px,1.2fr);gap:70px;align-items:center}.api-copy p:not(.section-label){margin-top:18px;color:var(--muted)}.api-points{margin-top:26px;list-style:none}.api-points li{padding:12px 0;border-bottom:1px solid #343d44;color:#c8ced2;font-size:13px}.api-points code{color:var(--amber);font-family:Consolas,monospace}
.code-sample{min-width:0;overflow:auto;padding:28px;border:1px solid #39444c;border-radius:6px;background:var(--code);box-shadow:0 22px 50px rgba(0,0,0,.28);color:#d6dde1;font:13px/1.75 Consolas,"SFMono-Regular",monospace;tab-size:2}.code-key{color:#ff8d80}.code-string{color:#8ee1b7}.code-number{color:#ffd06d}
.adoption-band{background:#0d1013}.adoption-steps{display:grid;grid-template-columns:repeat(5,minmax(0,1fr));list-style:none;counter-reset:step;border-top:1px solid #384149;border-bottom:1px solid #384149}.adoption-steps li{min-height:190px;padding:24px 18px;border-right:1px solid #30383f}.adoption-steps li:last-child{border-right:0}.adoption-steps li::before{counter-increment:step;content:"0" counter(step);display:block;margin-bottom:24px;color:var(--amber);font:800 12px/1 Consolas,monospace}.adoption-steps b{display:block;font-size:15px}.adoption-steps span{display:block;margin-top:9px;color:var(--muted);font-size:12px;line-height:1.7}
.quality-contract{display:grid;grid-template-columns:220px minmax(0,1fr);align-items:center;margin-top:36px;padding:26px 0;border-bottom:2px solid var(--green)}.quality-contract div{display:flex;flex-direction:column}.quality-contract strong{font:900 34px/1 Consolas,monospace;color:var(--green)}.quality-contract span{margin-top:8px;color:var(--muted);font-size:11px}.quality-contract p{color:#c3c9cd;font-size:14px}
.roadmap-band{background:#15191d;border-top:1px solid rgba(255,255,255,.08)}.roadmap-band h2{max-width:800px}.roadmap-line{display:grid;grid-template-columns:repeat(5,minmax(0,1fr));margin-top:42px;border-top:2px solid #3b464e}.roadmap-line div{position:relative;padding:26px 18px 8px}.roadmap-line div::before{content:"";position:absolute;width:10px;height:10px;top:-6px;left:18px;background:var(--cyan)}.roadmap-line b{font:800 14px/1 Consolas,monospace;color:var(--cyan)}.roadmap-line span{display:block;margin-top:9px;color:var(--muted);font-size:11px;line-height:1.65}
.engine-footer{display:flex;align-items:center;justify-content:space-between;gap:24px;padding:34px max(28px,calc((100% - 1124px)/2));border-top:1px solid #343c43;background:#090b0e}.engine-footer>div:first-child{display:flex;flex-direction:column}.engine-footer b{font-size:14px}.engine-footer span{margin-top:5px;color:var(--muted);font-size:10px}.engine-footer>div:last-child{display:flex;gap:20px}.engine-footer a{color:var(--muted);text-decoration:none;font-size:11px}.engine-footer a:hover{color:var(--cyan)}
@media(max-width:1080px){.architecture-flow{grid-template-columns:repeat(3,1fr)}.architecture-flow .flow-arrow{display:none}.flow-core,.flow-world,.flow-output{grid-column:span 1}.principles-grid{grid-template-columns:repeat(2,1fr)}.adoption-steps{grid-template-columns:repeat(3,1fr)}.adoption-steps li:nth-child(3){border-right:0}.adoption-steps li:nth-child(n+4){border-top:1px solid #30383f}.api-layout{grid-template-columns:1fr;gap:38px}.code-sample{width:100%}}
@media(max-width:760px){.engine-nav{height:58px;padding:7px 14px}.engine-links a:not(.nav-home){display:none}.engine-links{gap:8px}.engine-links .nav-home{font-size:11px;padding:5px 9px}.engine-hero{margin-top:58px;min-height:calc(100svh - 112px);align-items:flex-end}.engine-hero>img{object-position:62% center}.hero-shade{background:linear-gradient(0deg,rgba(5,8,10,.98) 0%,rgba(5,8,10,.82) 48%,rgba(5,8,10,.12) 100%)}.hero-copy{padding:120px 18px 38px}.hero-copy h1{font-size:clamp(39px,13vw,58px);overflow-wrap:anywhere}.hero-cn{font-size:18px}.hero-lead{font-size:14px;line-height:1.75}.hero-actions{flex-direction:column}.hero-actions a{width:100%}.hero-specs{gap:20px;justify-content:space-between}.hero-specs dt{font-size:15px}.section-inner{padding:62px 16px}.definition-grid,.section-heading{grid-template-columns:1fr;gap:24px}.section-heading{margin-bottom:30px}.runtime-heading{grid-template-columns:1fr auto}.runtime-heading>div:first-child{grid-column:1/-1}.runtime-controls{justify-content:flex-start}.runtime-layout{grid-template-columns:1fr}.runtime-canvas-wrap{min-height:0}.runtime-stats{grid-template-columns:repeat(4,1fr)}.runtime-stats>div{min-height:78px;padding:12px 8px;text-align:center;border-right:1px solid #303940}.runtime-stats>div:nth-child(4){border-right:0}.runtime-stats dt{font-size:16px}.runtime-stats .event-cell{grid-column:1/-1;min-height:100px;text-align:left}.architecture-flow{grid-template-columns:1fr 1fr}.architecture-flow>div:not(.flow-arrow){min-height:90px}.principles-grid{grid-template-columns:1fr}.table-row{grid-template-columns:100px 1fr}.table-row>*:last-child{grid-column:1/-1;border-left:0;border-top:1px solid #30383f}.table-head>*:last-child{display:none}.adoption-steps{grid-template-columns:1fr}.adoption-steps li{min-height:0;border-right:0;border-bottom:1px solid #30383f}.adoption-steps li:nth-child(n+4){border-top:0}.quality-contract{grid-template-columns:1fr;gap:20px}.roadmap-line{grid-template-columns:1fr;border-top:0;border-left:2px solid #3b464e;margin-left:6px}.roadmap-line div{padding:12px 18px 22px}.roadmap-line div::before{top:16px;left:-6px}.engine-footer{flex-direction:column;align-items:flex-start;padding:28px 16px}.engine-footer>div:last-child{flex-wrap:wrap}.code-sample{padding:18px;font-size:11px}}
@media(max-width:420px){.engine-brand b{font-size:12px}.engine-brand small{font-size:8px}.brand-mark{transform:rotate(45deg) scale(.82)}.engine-links .nav-home{max-width:78px;text-align:center;line-height:1.1}.hero-specs{gap:10px}.hero-specs dd{font-size:9px}.runtime-stats dd{font-size:9px}.architecture-flow{grid-template-columns:1fr}.section-heading h2,.definition-grid h2,.capability-band h2,.api-copy h2,.roadmap-band h2{font-size:29px}}
.engine-language select{max-width:150px;border:1px solid #3b464e;border-radius:4px;background:#11171c;color:#d7dde1;padding:6px 24px 6px 8px;font:600 10px/1.2 inherit}.sr-only{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap;border:0}html[dir="rtl"] .engine-hero,html[dir="rtl"] .section-inner,html[dir="rtl"] .engine-footer{text-align:right}
@media(max-width:760px){.engine-links .nav-home{display:none}.engine-language select{max-width:128px}}
@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}*,*::before,*::after{transition:none!important;animation:none!important}}