:root{--paper:#f7f5f0;--surface:#fbfaf7;--ink:#302d30;--muted:#77716f;--accent:#7d627d;--line:#d8d2cb;--reading:Iowan Old Style,Palatino Linotype,Book Antiqua,Palatino,Georgia,Songti SC,Songti TC,Noto Serif CJK SC,Yu Mincho,serif;font-family:var(--reading);color:var(--ink);background:var(--paper);font-synthesis:none;scroll-behavior:smooth;scroll-padding-top:35px}
*{box-sizing:border-box}
body{margin:0}
a{color:inherit;text-decoration:none}
a:hover{color:var(--accent)}
button,select{font:inherit}
a:focus-visible,select:focus-visible{outline:2px solid var(--accent);outline-offset:6px}
::selection{background:#dfd5df}
.sr-only{position:absolute;width:1px;height:1px;overflow:hidden;clip:rect(0,0,0,0)}
.skip{position:absolute;inset:8px auto auto 12px;transform:translateY(-150%);background:var(--surface);padding:10px;z-index:10}
.skip:focus{transform:none}
.masthead{max-width:1440px;margin:auto;min-height:104px;padding:0 6%;display:flex;align-items:center;gap:36px;border-bottom:1px solid var(--line)}
.feather{font-size:31px;letter-spacing:-1.1px}
.feather span{color:var(--accent);font-weight:400}
.masthead nav{display:flex;gap:32px;margin:auto;font-size:14px}
.language{display:flex;align-items:center}
.language select{border:0;background:transparent;color:var(--muted);max-width:118px;font-size:13px;cursor:pointer;padding:8px 0}
.hero{max-width:1440px;min-height:720px;margin:auto;display:grid;grid-template-columns:1.1fr .9fr;position:relative;padding:76px 6% 80px;align-items:center}
.eyebrow{font-size:11px;letter-spacing:.14em;text-transform:uppercase;color:var(--muted);line-height:1.8}
.eyebrow>span:first-child{margin-right:12px;color:var(--accent)}
h1{font-size:clamp(80px,8.4vw,128px);letter-spacing:-.065em;font-weight:400;line-height:1;margin:28px 0 16px}
h1>span{color:var(--accent)}
.hero-title{font-size:clamp(30px,3.1vw,45px);line-height:1.2;letter-spacing:-.025em;margin:0 0 25px;max-width:510px}
.intro{font-size:17px;line-height:1.7;max-width:390px;margin:0 0 29px;color:var(--muted)}
.text-link{display:inline-flex;gap:44px;padding:10px 0;border-bottom:1px solid var(--accent);font-size:15px;align-items:center}
.text-link>span:last-child{color:var(--accent);font-family:serif}
.hero-art{margin:-10px 0 0 35px;position:relative}
.athena-seal{width:100%;max-height:505px;display:block;overflow:visible}
.axis{stroke:#ded8d0;stroke-width:.6;stroke-dasharray:2 8}
.orbit{stroke:#c9bbcd;stroke-width:.7}
.orbit-b{stroke:#cfc5bc;stroke-width:.6;stroke-dasharray:1 7}
.orbit-c{stroke:#947c96;stroke-width:1}
.point{fill:#a28ba3}
.owl{stroke:#78607c;stroke-width:.44;stroke-linecap:round;stroke-linejoin:round}
.eye{fill:#78607c;stroke:none}
.base{stroke:#a18e9f;stroke-width:1}
figcaption{font-size:9px;letter-spacing:.22em;text-align:center;color:#8c7e8c;margin-top:5px}
.hero-note{position:absolute;bottom:31px;left:6%;display:flex;gap:10px;align-items:center;font-size:12px;color:var(--muted)}
.status-dot{width:5px;height:5px;border:1px solid var(--accent);border-radius:50%}
.hero-index{position:absolute;right:6%;bottom:32px;font-size:9px;letter-spacing:.18em;color:var(--muted)}
.product-section{max-width:1440px;margin:auto;border-top:1px solid var(--line);padding:110px 9%;display:grid;grid-template-columns:.9fr 1.1fr;gap:12%;align-items:center;background:var(--surface)}
h2{font-size:clamp(33px,3.2vw,47px);line-height:1.18;font-weight:400;letter-spacing:-.035em;margin:23px 0 25px}
.section-heading>p{font-size:17px;line-height:1.8;color:var(--muted);max-width:390px;margin:0}
.conversation-preview{background:var(--paper);border:1px solid var(--line);padding:25px 30px 20px;max-width:485px;border-radius:3px;position:relative}
.preview-top{display:flex;justify-content:space-between;font-size:10px;letter-spacing:.2em;color:var(--muted);margin-bottom:42px}
.preview-greeting{font-size:23px;line-height:1.5;max-width:280px}
.preview-user{font-size:14px;line-height:1.6;padding:12px 15px;background:#eae5e9;border-radius:3px;margin:26px 0 20px 25%;}
.preview-reply{display:flex;gap:12px;font-size:15px;line-height:1.7}
.preview-reply p{margin:0;max-width:340px}
.small-owl{color:var(--accent)}
.preview-file{display:flex;align-items:center;gap:12px;margin:18px 0 34px 27px;font-size:12px;color:var(--muted)}
.file-rule{flex:1;border-top:1px solid var(--line);max-width:60px}
.preview-file>span:last-child{font-size:9px;letter-spacing:.1em}
.preview-composer{border:1px solid var(--line);background:var(--surface);padding:13px 14px;color:#948b90;display:flex;justify-content:space-between;align-items:center;border-radius:3px;font-size:13px}
.preview-composer>span:last-child{padding:3px 8px;background:#e9e2ea;color:var(--accent);border-radius:2px}
.illustration-label{display:block;text-align:right;margin-top:9px;font-size:9px;letter-spacing:.04em;color:var(--muted)}
.approach-section{max-width:1440px;margin:auto;padding:105px 9%;display:grid;grid-template-columns:.9fr 1.1fr;gap:12%;border-top:1px solid var(--line)}
.principles article{display:flex;gap:24px;padding:0 0 29px;margin-bottom:28px;border-bottom:1px solid var(--line)}
.principles article:last-child{margin-bottom:0}
.number{font-size:14px;color:var(--accent);padding-top:6px;width:18px;flex-shrink:0}
h3{font-size:25px;font-weight:400;margin:0 0 10px;letter-spacing:-.02em}
.principles p{font-size:15px;line-height:1.75;color:var(--muted);margin:0;max-width:385px}
.release-section{max-width:1440px;margin:auto;padding:78px 9% 80px;border-top:1px solid var(--line);border-bottom:1px solid var(--line);display:grid;grid-template-columns:1fr 1fr;gap:10%;background:#eeeaee}
.release-detail{align-self:center}
.release-detail>p:first-child{font-size:18px;line-height:1.75;margin:0 0 22px;max-width:410px}
.release-footnote{font-size:12px;color:var(--muted);line-height:1.7;margin:20px 0 0}
.solid-link{display:inline-flex;align-items:center;gap:40px;background:var(--ink);color:var(--surface);padding:13px 17px;margin:0 22px 12px 0;font-size:14px;border-radius:2px}
.solid-link:hover{background:var(--accent);color:white}
[hidden]{display:none!important}
footer{max-width:1440px;margin:auto;display:flex;justify-content:space-between;align-items:center;padding:38px 6% 44px;gap:24px}
footer .feather{font-size:27px}
footer p,footer>span{font-size:12px;color:var(--muted);line-height:1.7}
footer p{margin:auto}
.noscript{text-align:center;padding:12px;font-size:13px;color:var(--muted)}
html[lang^="zh"] h1,html[lang="ja"] h1{letter-spacing:-.065em}
html[lang^="zh"] .hero-title,html[lang^="zh"] h2,html[lang="ja"] .hero-title,html[lang="ja"] h2{letter-spacing:.035em;line-height:1.45}
html[lang^="zh"] .intro,html[lang^="zh"] .section-heading>p,html[lang="ja"] .intro,html[lang="ja"] .section-heading>p{line-height:1.95}
html[lang^="zh"] .eyebrow,html[lang="ja"] .eyebrow{letter-spacing:.16em}
@media(min-width:1600px){.hero{min-height:760px}
}
@media(max-width:850px){.masthead{min-height:84px;padding:0 6%;gap:20px}
.masthead nav{gap:18px;font-size:13px}
.hero{min-height:630px;padding-top:54px}
.hero-art{margin-left:0}
.hero-title{font-size:32px}
.intro{font-size:16px;max-width:320px}
.product-section,.approach-section{gap:7%;padding:80px 6%}
.conversation-preview{padding:22px}
.release-section{padding:65px 6%;gap:7%}
h2{font-size:34px}
footer{padding-top:30px}
}
@media(max-width:620px){.masthead{min-height:76px;flex-wrap:wrap;gap:10px}
.feather{font-size:27px}
.masthead nav{display:none}
.language{margin-left:auto}
.hero{grid-template-columns:1fr;min-height:auto;padding:53px 7% 56px;overflow:hidden}
.hero-copy{position:relative;z-index:1}
.eyebrow{font-size:10px}
h1{font-size:89px;margin:28px 0 19px}
.hero-title{font-size:33px;line-height:1.25;max-width:340px}
.intro{max-width:300px;font-size:16px;margin-bottom:24px}
.hero-art{position:absolute;right:-42px;top:78px;width:230px;opacity:.18;pointer-events:none}
.hero-art figcaption{display:none}
.hero-note{position:relative;left:auto;bottom:auto;margin-top:50px;font-size:11px}
.hero-index{display:none}
.product-section,.approach-section,.release-section{grid-template-columns:1fr;padding:58px 7%;gap:38px}
h2{font-size:34px;margin-top:18px}
.section-heading>p{font-size:16px;max-width:360px}
.conversation-preview{max-width:none;padding:24px}
.preview-top{margin-bottom:32px}
.preview-greeting{font-size:22px}
.preview-user{margin-left:12%;}
.principles article{gap:18px;padding-bottom:26px;margin-bottom:25px}
h3{font-size:25px}
.principles p{font-size:16px}
.approach-section{gap:12px}
.release-section{gap:8px}
.release-detail>p:first-child{font-size:17px}
.release-footnote{font-size:12px}
footer{padding:30px 7%;flex-wrap:wrap;gap:16px}
footer p{margin:0;order:2;flex-basis:100%}
footer>span{margin-left:auto;font-size:11px}
}
@media(prefers-reduced-motion:reduce){:root{scroll-behavior:auto}
}
@media(max-width:620px){.masthead{padding-top:16px;padding-bottom:14px}.masthead nav{display:flex;order:3;flex-basis:100%;justify-content:space-between;padding-top:12px;font-size:12px;gap:12px}.masthead .language{order:2}}