/* Independent public homepage. Blue brand palette; no shared documentation selectors. */
:root{--bg:#fff;--panel:#fff;--text:#15223b;--muted:#65738b;--subtle:#8490a5;--line:#e3e9f2;--soft:#f5f8ff;--accent:#2555e6;--button:#2f6bff;--art-bg:#f0f5ff;--header:rgba(255,255,255,.9);--shadow:0 16px 50px #1539780c;color-scheme:light}
html[data-theme=dark]{--bg:#0b1220;--panel:#111c2e;--text:#eef3ff;--muted:#a6b4ca;--subtle:#8798b1;--line:#26334a;--soft:#0e192b;--accent:#85acff;--button:#2f6bff;--art-bg:#12213a;--header:rgba(11,18,32,.92);--shadow:0 16px 50px #0002;color-scheme:dark}
*{box-sizing:border-box}html{scroll-behavior:smooth;scroll-padding-top:104px}body{margin:0;background:var(--bg);color:var(--text);font:15px/1.7 -apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Hiragino Sans GB","Microsoft YaHei",sans-serif;-webkit-font-smoothing:antialiased}a{color:inherit;text-decoration:none}button{font:inherit;cursor:pointer}a,button{touch-action:manipulation;-webkit-tap-highlight-color:transparent}button{color:inherit}p,h1,h2,h3{margin:0}svg{width:20px;height:20px;flex-shrink:0}img{max-width:100%}button,a,[tabindex="0"]{outline-offset:5px}a:focus-visible,button:focus-visible,[tabindex="0"]:focus-visible{outline:3px solid var(--accent)}[hidden]{display:none!important}::selection{background:#b5d1ff;color:#102554}.wrap{width:min(100% - 96px,1200px);margin-inline:auto}.skip{position:fixed;top:-80px;left:20px;z-index:100;background:var(--panel);border:1px solid var(--accent);padding:10px 18px;border-radius:8px}.skip:focus{top:10px}.site-header{height:84px;position:sticky;top:0;z-index:30;background:var(--header);backdrop-filter:blur(20px);border-bottom:1px solid transparent;transition:border-color .2s,box-shadow .2s}.site-header.scrolled{border-color:var(--line);box-shadow:0 2px 20px #00000003}.nav-shell{height:100%;display:flex;align-items:center;gap:66px}.brand{display:inline-flex;align-items:center;gap:10px;flex-shrink:0;letter-spacing:-1px;font-size:24px;line-height:1.2}.brand img{width:32px;height:32px;border-radius:9px}.brand strong{font-weight:740}.main-nav{display:flex;align-items:center;gap:32px;color:var(--muted);font-size:14px}.main-nav a:hover{color:var(--accent)}.nav-actions{display:flex;align-items:center;gap:12px;margin-left:auto}.language,.theme-toggle,.menu-toggle{width:36px;height:36px;display:inline-flex;align-items:center;justify-content:center;background:none;border:0;border-radius:8px;font-size:12px;color:var(--muted)}.language:hover,.theme-toggle:hover,.menu-toggle:hover{background:var(--soft);color:var(--text)}.theme-toggle svg{width:18px;height:18px}.moon-icon{display:none}html[data-theme=dark] .moon-icon{display:block}html[data-theme=dark] .sun-icon{display:none}.nav-cta{display:flex;align-items:center;gap:17px;padding:8px 15px;border:1px solid var(--line);background:var(--panel);border-radius:8px;font-size:12px;font-weight:600}.nav-cta:hover{border-color:var(--accent)}.nav-cta svg{width:15px;height:15px}.menu-toggle{display:none}#mobile-menu{padding:16px 24px 24px;background:var(--panel);border-bottom:1px solid var(--line)}#mobile-menu a{display:block;padding:12px 4px;font-size:15px}
/* Playground is a navigation disclosure; its destinations remain ordinary links. */
.main-nav{white-space:nowrap}.playground-nav{position:relative}.playground-toggle{display:flex;align-items:center;gap:5px;padding:8px 0;border:0;background:transparent;color:inherit;font:inherit;border-radius:5px}.playground-toggle:hover,.playground-toggle[aria-expanded=true]{color:var(--accent)}.playground-toggle svg{width:14px;height:14px;transition:transform .18s}.playground-toggle[aria-expanded=true] svg{transform:rotate(180deg)}.playground-dropdown{position:absolute;top:calc(100% + 13px);left:-20px;width:292px;padding:8px;background:var(--panel);border:1px solid var(--line);border-radius:12px;box-shadow:var(--shadow);white-space:normal}.playground-dropdown a{position:relative;display:block;padding:13px 34px 13px 13px;border-radius:7px;color:var(--text)}.playground-dropdown a:hover,.playground-dropdown a:focus-visible{background:var(--soft);color:var(--accent)}.playground-link-title{display:block;font-size:14px;line-height:1.5;font-weight:600}.playground-link-note{display:block;margin-top:4px;font-size:12px;line-height:1.7;color:var(--muted)}.playground-link-arrow{position:absolute;right:13px;top:15px;font-size:14px;color:var(--subtle)}.mobile-playground{margin-top:12px;padding-top:17px;border-top:1px solid var(--line)}.mobile-playground-heading{display:block;padding:0 4px 5px;font-size:12px;font-weight:600;letter-spacing:.04em;color:var(--subtle)}#mobile-menu .mobile-playground a{display:flex;align-items:center;justify-content:space-between;padding:11px 4px;font-size:14px}#mobile-menu .mobile-playground a>span:last-child{color:var(--accent)}#mobile-menu{max-height:calc(100dvh - 84px);overflow-y:auto}#mobile-menu a:hover{color:var(--accent)}
/* First fold: a quiet grid, a strong headline, and an original CSS gateway illustration. */
.hero-shell{position:relative;background:linear-gradient(180deg,var(--bg) 0%,var(--bg) 73%,var(--soft) 100%)}.hero{display:grid;grid-template-columns:1.05fr 1fr;align-items:center;gap:24px;padding-top:68px;padding-bottom:65px;min-height:610px}.hero-copy{position:relative;z-index:2}.announcement{display:inline-flex;align-items:center;gap:9px;background:var(--soft);border:1px solid var(--line);border-radius:100px;padding:5px 11px 5px 10px;font-size:11px;letter-spacing:.04em;color:var(--accent);margin-bottom:28px}.announcement svg{width:12px;height:12px;margin-left:5px}.dot{width:6px;height:6px;background:var(--button);border-radius:50%;box-shadow:0 0 0 3px #2f6bff12}.hero h1{font-size:clamp(44px,4.7vw,67px);line-height:1.23;letter-spacing:-.055em;font-weight:730}.hero-accent{color:var(--accent)}.hero-lead{font-size:19px;font-weight:500;margin:25px 0 9px;letter-spacing:-.015em}.hero-description{font-size:14px;line-height:1.95;color:var(--muted);max-width:390px;letter-spacing:.01em}.hero-actions{display:flex;align-items:center;gap:12px;margin-top:30px}.button{display:inline-flex;align-items:center;justify-content:center;gap:26px;padding:12px 22px;border:1px solid var(--line);border-radius:8px;font-size:13px;font-weight:600;transition:transform .2s,box-shadow .2s,background .2s;min-height:48px}.button svg{width:17px;height:17px}.primary{color:#fff;background:var(--button);border-color:var(--button);box-shadow:0 5px 12px #2f6bff20,inset 0 1px 0 #ffffff25}.primary:hover{background:#2159e8;transform:translateY(-2px);box-shadow:0 8px 20px #2f6bff30}.secondary{background:var(--panel);color:var(--text)}.secondary:hover{border-color:var(--accent);transform:translateY(-2px)}.hero-notes{display:flex;flex-wrap:wrap;align-items:center;gap:18px;margin-top:25px;color:var(--muted);font-size:10px}.hero-notes>span{display:flex;gap:5px;align-items:center}.hero-notes svg{width:13px;height:13px;color:var(--accent)}.hero-visual{position:relative;isolation:isolate;overflow:clip;min-width:0;height:475px;align-self:center}.visual-grid{position:absolute;inset:0 -10px 45px;background-image:radial-gradient(#7197d944 .65px,transparent .65px);background-size:18px 18px;mask-image:radial-gradient(ellipse,black 25%,transparent 73%);z-index:-1}.visual-topline{position:absolute;inset:0 10px auto;display:flex;align-items:center;justify-content:space-between;font:8px/1.6 ui-monospace,SFMono-Regular,Consolas,monospace;letter-spacing:.13em;color:var(--subtle)}.tiny-cross{font-size:17px;font-weight:200;color:#6d94d5}.scene{position:absolute;inset:20px 0 48px}.orbit{position:absolute;border:1px solid #b5cdf066;border-radius:50%;left:50%;top:48%;transform:translate(-50%,-50%) rotate(-32deg);z-index:-1}.orbit-one{width:350px;height:255px}.orbit-two{width:460px;height:345px;border-style:dashed;border-color:#b5cdf055}.gateway-orb{position:absolute;width:236px;height:236px;left:50%;top:42%;transform:translate(-50%,-50%) rotate(-20deg);border-radius:50%;background:conic-gradient(from 15deg,#1748bb,#5e9cff 18%,#d5ecff 29%,#548fff 42%,#1453d6 55%,#679fff 66%,#e3f4ff 76%,#306eeb 89%,#1748bb);box-shadow:inset 3px 3px 7px #fff9,inset -8px -10px 16px #0d3e9344,14px 25px 40px #296be532;display:flex;align-items:center;justify-content:center}.gateway-orb:before{content:"";position:absolute;inset:11px;border-radius:50%;border:1px solid #ffffff60}.orb-face{width:151px;height:151px;border-radius:50%;background:linear-gradient(145deg,#fff,#eef6ff);box-shadow:inset 2px 6px 9px #1e53ab30,0 1px 2px #fff;transform:rotate(20deg);display:flex;align-items:center;justify-content:center;flex-direction:column}.orb-symbol{font-family:Arial,sans-serif;font-size:87px;line-height:.9;font-weight:700;color:#245edf;letter-spacing:-11px;transform:translateX(-3px)}.orb-symbol>span{color:#44b7ff;font-size:37px;vertical-align:22px;margin-left:9px}.orb-label{color:#406295;font-size:10px;letter-spacing:.1em;margin-top:12px}.floating-chip{position:absolute;display:flex;align-items:center;gap:12px;padding:13px 17px;background:var(--panel);border:1px solid var(--line);border-radius:12px;box-shadow:var(--shadow)}.floating-chip small{display:block;color:var(--subtle);font:7px/1.5 ui-monospace,SFMono-Regular,monospace;letter-spacing:.08em}.floating-chip strong{display:block;font-size:13px;font-weight:600;margin-top:4px;letter-spacing:-.01em}.chip-icon{width:35px;height:35px;border-radius:9px;background:var(--soft);color:var(--accent);display:flex;align-items:center;justify-content:center}.chip-icon svg{width:19px;height:19px}.chip-dot{margin-left:15px;width:5px;height:5px;background:#57ac98;border-radius:50%}.model-chip{left:8px;top:35px;transform:rotate(-5deg);z-index:2}.output-chip{right:-5px;top:200px;transform:rotate(5deg);z-index:2}.request-card{position:absolute;left:14px;top:240px;width:305px;background:var(--panel);border:1px solid var(--line);border-radius:11px;box-shadow:0 12px 34px #2555c51a;transform:rotate(-4deg);z-index:3;overflow:hidden}.mini-window{display:flex;align-items:center;gap:13px;border-bottom:1px solid var(--line);height:30px;padding:0 13px;font:8px ui-monospace,monospace;color:var(--muted)}.mini-window>svg{margin-left:auto;width:12px;height:12px}.window-dots{display:flex;gap:4px}.window-dots i{display:block;width:5px;height:5px;border-radius:50%;background:#c7d1df}.mini-code{padding:12px 16px;font:9px/1.8 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button{display:flex;align-items:center;gap:7px;background:none;border:0;color:var(--muted);padding:8px 13px;border-radius:100px;font-size:10px}.scene-tabs button[aria-selected=true]{color:var(--accent);background:var(--soft);box-shadow:inset 0 0 0 1px #2f6bff12}.scene-tabs svg{width:14px;height:14px}
/* Native, decorative visual assets: no remote images or third-party resources. */
.landscape{position:absolute;inset:0;background:linear-gradient(160deg,#ddebff 0%,#adccff 48%,#7eacfc 100%);overflow:hidden}.land-sun{position:absolute;width:29%;aspect-ratio:1;border-radius:50%;left:44%;top:15%;background:linear-gradient(155deg,#fff,#e2f1ff);box-shadow:0 0 50px #fff5}.land-hill{position:absolute;width:125%;height:90%;border-radius:50%;transform:rotate(-25deg)}.hill-back{bottom:-56%;left:-20%;background:linear-gradient(160deg,#5e98ee,#98bdff);box-shadow:0 -1px 0 #e2eeff88}.hill-front{bottom:-62%;right:-28%;transform:rotate(33deg);background:linear-gradient(160deg,#1959cb,#619afa);box-shadow:0 -1px 0 #b9d7ff88}.land-orbit{position:absolute;left:24%;top:26%;width:44%;height:55%;border:1px solid #fff9;transform:rotate(-28deg);border-radius:50%;box-shadow:0 0 0 14px #ffffff16}.image-art-card{position:absolute;width:330px;height:300px;top:35px;left:50%;transform:translateX(-50%) rotate(-7deg);border:8px solid var(--panel);border-radius:14px;box-shadow:0 25px 60px #2f6bff22;overflow:hidden}.art-card-caption{position:absolute;bottom:0;left:0;right:0;padding:12px;background:var(--panel);font:8px ui-monospace,monospace;letter-spacing:.12em;display:flex;justify-content:space-between;align-items:center}.art-card-caption svg{width:15px;height:15px}.image-model-chip{top:10px;right:-8px;transform:rotate(5deg)}.prompt-chip{position:absolute;left:25px;right:20px;bottom:38px;padding:15px 17px;background:var(--panel);border:1px solid var(--line);border-radius:10px;box-shadow:var(--shadow);font-size:12px;display:flex;gap:10px;align-items:center}.prompt-chip svg{color:var(--accent)}.video-art-card{position:absolute;top:57px;left:12px;right:8px;height:285px;border:7px solid var(--panel);border-radius:15px;box-shadow:0 25px 55px #2f6bff25;transform:rotate(-4deg);overflow:hidden}.video-art-card .landscape{filter:saturate(.8);background:linear-gradient(150deg,#a6bcd8,#304d81)}.video-art-card .hill-front{background:linear-gradient(160deg,#11284c,#3e68a6)}.video-art-card .hill-back{background:linear-gradient(150deg,#4872a6,#81a6cf)}.play-icon{position:absolute;left:50%;top:45%;transform:translate(-50%,-50%);width:43px;height:43px;border-radius:50%;border:1px solid #ffffff80;background:#ffffff25;backdrop-filter:blur(8px);display:flex;align-items:center;justify-content:center;font-size:13px;color:#fff;padding-left:3px}.film-timeline{position:absolute;bottom:0;left:0;right:0;height:50px;background:#112545d9;padding:10px 12px;display:flex;gap:6px}.film-timeline>span{flex:1;background:linear-gradient(145deg,#9db9dd,#40639a);border:1px solid #ffffff40;border-radius:4px}.film-timeline i{position:absolute;left:39%;top:4px;bottom:4px;width:2px;background:#e4efff}.video-model-chip{right:12px;top:10px;transform:rotate(3deg);z-index:1}
.ecosystem{display:flex;align-items:center;gap:45px;padding-top:28px;padding-bottom:36px;border-top:1px solid var(--line)}.ecosystem p{font-size:10px;color:var(--muted);max-width:150px;flex-shrink:0;letter-spacing:.02em}.tool-links{display:flex;align-items:center;justify-content:space-between;gap:24px;flex:1}.tool-links a{display:flex;align-items:center;gap:9px;font-size:16px;font-weight:600;letter-spacing:-.4px;color:var(--muted);white-space:nowrap;transition:color .2s}.tool-links a:hover{color:var(--accent)}.tool-links svg{width:20px;height:20px}
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26px;border-right:0;border-bottom:1px solid var(--line);display:grid;grid-template-columns:40px 1fr;gap:5px 16px}.trust-grid article:last-child{border:0;padding-bottom:0}.trust-icon{grid-row:1/3;margin:0}.trust-grid h3{font-size:16px;margin:0}.trust-grid p{font-size:13px;grid-column:2}.resources{padding-top:35px;padding-bottom:55px}.resource-intro{display:block}.resource-intro .eyebrow{margin-bottom:15px}.resource-intro h2{font-size:25px}.resource-grid{gap:11px}.resource-link{padding:20px 17px}.resource-link p{font-size:11px}.closing{padding-bottom:55px}.closing-inner{border-radius:14px;padding:47px 20px}.closing-inner h2{font-size:33px}.closing-inner>p:not(.eyebrow){font-size:11px}.closing-inner .hero-actions{gap:9px}.closing-inner .button{font-size:11px;padding:11px 16px;gap:12px}.footer-main{grid-template-columns:repeat(3,1fr);gap:32px 18px;padding-bottom:35px}.footer-brand{grid-column:1/-1}.footer-brand p{margin-top:13px}.footer-location{margin-top:15px}.footer-main h3{font-size:11px;margin-bottom:14px}.footer-main>div:not(:first-child)>a{font-size:10px}.footer-bottom{font-size:9px;gap:10px;flex-wrap:wrap}.footer-bottom>span:nth-child(2){display:none}.image-art-card{top:37px;width:300px;height:285px}.image-model-chip{top:14px;right:2px}.prompt-chip{left:14px;right:14px;bottom:28px;font-size:11px}.video-art-card{top:61px;left:8px;right:8px;height:280px}.video-model-chip{top:10px}.art-card-caption{font-size:7px}html[lang=en] .hero h1{font-size:52px}html[lang=en] .hero-lead{font-size:15px}html[lang=en] .product-body h3{font-size:23px}html[lang=en] .product-body>p{min-height:0}html[lang=en] .resource-link p{font-size:11px}}
@media(max-width:380px){.wrap{width:calc(100% - 32px)}.brand{font-size:19px}.brand img{width:25px;height:25px}.nav-shell{gap:8px}.nav-actions{gap:0}.nav-cta{padding:6px 9px}.nav-cta svg{display:none}.language,.theme-toggle,.menu-toggle{width:28px}.hero{padding-top:37px;gap:33px}.hero h1{font-size:44px}.hero-lead{font-size:15px}.hero-description{font-size:12px}.hero-notes{font-size:8px;gap:9px}.hero-visual{height:425px}.gateway-orb{width:195px;height:195px}.orb-face{width:125px;height:125px}.orb-symbol{font-size:73px}.model-chip{left:0;top:30px}.floating-chip{gap:7px;padding:9px 11px}.floating-chip strong{font-size:11px}.output-chip{top:175px;right:0}.request-card{width:260px;top:217px;left:5px}.request-foot{font-size:7px}.mini-code{font-size:7px}.chip-dot{margin-left:3px}.scene-tabs button{font-size:9px;padding-inline:10px;gap:5px}.scene-tabs svg{width:12px;height:12px}.tool-links a{font-size:13px}.tool-links{gap:19px 23px}.image-art-card{width:250px;height:255px}.prompt-chip{font-size:9px}.video-art-card{height:250px}.hero-actions .button{padding-inline:17px;font-size:11px;gap:16px}.product-art{height:203px}.editor-lines{font-size:8px}.small-landscape{height:165px}.product-body{padding:23px}.product-body h3{font-size:20px}.code-tabs{gap:18px}.code-tabs button{font-size:10px}.code-file{font-size:7px;padding-inline:16px}.code-panel pre{font-size:9px;padding-inline:16px}.code-note{padding-inline:16px;font-size:7px}.closing-inner{padding-inline:14px}.closing-inner h2{font-size:30px}.closing-inner .hero-actions .button{font-size:10px;padding-inline:13px;gap:8px}.footer-main{gap:28px 12px}html[lang=en] .hero h1{font-size:43px}html[lang=en] .hero-lead{font-size:13px}html[lang=en] .hero-notes{font-size:7px}}
@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}*,*:before,*:after{animation:none!important;transition:none!important}}

/* Header links switch to the compact navigation before they crowd tablet widths. */
@media(min-width:1001px) and (max-width:1120px){.nav-shell{gap:26px}.main-nav{gap:20px}.nav-actions{gap:8px}.playground-dropdown{left:auto;right:-18px}}
@media(max-width:1000px){.main-nav{display:none}.menu-toggle{display:inline-flex}}
@media(max-width:760px){#mobile-menu{max-height:calc(100dvh - 70px)}}

/* Business headline: retain the intentional two-line composition at every width. */
html[lang=zh-CN] .hero h1{font-size:clamp(31px,4.2vw,60px)}
html[lang=en] .hero h1{font-size:clamp(29px,3.45vw,49px)}
.hero h1>span{display:inline-block;white-space:nowrap}
.hero-lead{text-wrap:balance}.hero-description{white-space:pre-line}
@media(max-width:760px){html[lang=zh-CN] .hero h1{font-size:clamp(28px,9.3vw,54px)}html[lang=en] .hero h1{font-size:clamp(23px,6.6vw,43px)}}