:root{color-scheme:light;--ink:#19313c;--muted:#526b78;--blue:#174c68;--pale:#edf5f8;--line:#d6e3e9;--coral:#d76659;--wide:1240px;font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Noto Sans CJK SC",sans-serif;color:var(--ink);background:#fff;font-synthesis:none}*{box-sizing:border-box}html{scroll-behavior:smooth;scroll-padding-top:30px}body{margin:0}a{color:var(--blue);text-underline-offset:.24em}a:hover{text-decoration-thickness:2px}a:focus-visible,button:focus-visible{outline:3px solid var(--coral);outline-offset:5px}img{display:block;max-width:100%;height:auto}.skip{position:absolute;top:-80px;left:16px;background:#fff;padding:12px;z-index:100}.skip:focus{top:12px}.site-header{max-width:var(--wide);margin:auto;padding:28px 36px;display:flex;align-items:center;justify-content:space-between;gap:24px}.wordmark{font-size:28px;letter-spacing:-1.4px;font-weight:760;text-decoration:none;color:var(--ink);display:inline-flex;gap:3px;align-items:baseline}.logo-dot{width:7px;height:7px;border-radius:50%;background:var(--coral)}nav{display:flex;align-items:center;gap:30px}nav a{font-size:15px;text-decoration:none;font-weight:550}.language{border:1px solid var(--line);border-radius:24px;padding:8px 15px}main{max-width:var(--wide);margin:auto;padding:0 36px}.intro{padding:65px 0 45px;display:grid;grid-template-columns:1.15fr 1fr;align-items:end;gap:60px}h1,h2,h3,p{margin:0}h1{font-family:Georgia,"Songti SC",serif;font-weight:400;font-size:clamp(44px,5.1vw,70px);letter-spacing:-.045em;line-height:1.08;text-wrap:balance}.intro>p{max-width:480px;padding-bottom:6px;font-size:20px;line-height:1.65;color:var(--muted)}.feature{display:grid;grid-template-columns:.78fr 1.5fr;gap:30px;align-items:center;background:var(--pale);border-radius:24px;padding:34px 30px 30px 38px}.feature-copy{padding:16px 0}.category{color:var(--blue);font-size:14px;margin:0 0 17px;font-weight:600}.feature h2{font-family:Georgia,"Songti SC",serif;font-weight:400;font-size:clamp(32px,3.2vw,43px);letter-spacing:-.035em;line-height:1.16}.feature-description{font-size:17px;line-height:1.7;color:var(--muted);margin:20px 0 26px;max-width:350px}.button{display:inline-block;background:var(--blue);color:#fff;text-decoration:none;font-weight:600;border-radius:9px;padding:15px 22px;line-height:1.35;font-size:15px;transition:background .15s}.button:hover{background:#226780}.text-link{display:block;margin-top:20px;font-size:14px;line-height:1.7}.model-preview{display:block;background:#fff;border:1px solid var(--line);border-radius:14px;overflow:hidden;text-decoration:none}.model-preview img{width:100%;aspect-ratio:1.5;object-fit:contain;background:#fff}.preview-caption{display:flex;align-items:center;justify-content:space-between;padding:14px 19px;border-top:1px solid var(--line);font-size:14px;font-weight:550}.learning{padding:72px 0 65px}.learning h2,.about h2{font-family:Georgia,"Songti SC",serif;font-size:32px;font-weight:400;letter-spacing:-.03em;line-height:1.25}.topics{display:grid;grid-template-columns:repeat(3,1fr);gap:46px;margin-top:30px}.topics h3{font-size:18px;font-weight:620;margin-bottom:12px;line-height:1.4}.topics p{color:var(--muted);font-size:16px;line-height:1.75;max-width:36ch}.about{border-top:1px solid var(--line);padding:53px 0 65px;display:grid;grid-template-columns:1.3fr 1fr;gap:85px}.about>div>p{line-height:1.8;max-width:58ch;color:var(--muted);margin-top:20px}.about aside{padding-left:27px;border-left:3px solid #d8e7ef;font-size:14px;line-height:1.85;color:var(--muted)}.about aside a{display:inline-block;margin-top:14px}footer{max-width:var(--wide);margin:auto;border-top:1px solid var(--line);padding:25px 36px 35px;display:flex;align-items:center;gap:24px}footer .wordmark{font-size:22px}footer p{color:var(--muted);font-size:13px}footer>a:last-child{margin-left:auto;font-size:13px}.project-page{padding-top:32px}.back{font-size:14px}.project-intro{display:grid;grid-template-columns:1.3fr .7fr;gap:80px;align-items:end;padding:35px 0 40px}.project-intro h1{font-size:clamp(40px,4.5vw,62px)}.lead{font-size:19px;line-height:1.75;color:var(--muted);max-width:62ch;margin-top:24px}.launch{padding:15px 0 4px}.launch p{color:var(--muted);font-size:14px;line-height:1.7;max-width:34ch;margin-top:18px}.project-image{margin:0}.project-image img{width:100%;height:auto;border:1px solid var(--line);border-radius:16px;background:var(--pale)}figcaption{color:var(--muted);font-size:13px;margin-top:12px}.steps{padding-left:22px;color:var(--muted);line-height:1.8;max-width:60ch}.steps li{padding:7px 0 7px 4px}.reading{max-width:860px;padding-top:60px;padding-bottom:80px}.reading h1{font-size:52px}.reading h2{font-size:24px;margin:40px 0 16px;font-weight:600}.reading p,.reading li{line-height:1.85;color:var(--muted)}.reading p+p{margin-top:15px}.reading .button{margin-top:30px}.reading ul{padding-left:24px}html[lang=zh-CN] h1{font-family:-apple-system,BlinkMacSystemFont,"PingFang SC",sans-serif;font-weight:550;line-height:1.25;letter-spacing:-.035em}html[lang=zh-CN] .intro{grid-template-columns:1.2fr 1fr;gap:40px}html[lang=zh-CN] .feature h2{font-family:inherit;font-size:35px;font-weight:550}html[lang=zh-CN] .learning h2,html[lang=zh-CN] .about h2{font-family:inherit;font-size:27px;font-weight:550}@media(max-width:900px){.intro{gap:30px;padding-top:40px}.intro>p{font-size:17px}.feature{grid-template-columns:1fr 1.3fr;padding:26px;gap:25px}.topics{gap:24px}.about{gap:38px}.project-intro{gap:35px}}@media(max-width:680px){.site-header{padding:20px}main{padding:0 20px}nav{gap:17px}nav a{font-size:14px}.wordmark{font-size:25px}.language{padding:7px 11px}.intro,html[lang=zh-CN] .intro{display:block;padding:37px 0 30px}.intro>p{margin-top:23px;font-size:18px;max-width:40ch}h1{font-size:46px;max-width:12ch}.feature{display:flex;flex-direction:column;padding:25px 18px 18px;border-radius:20px;gap:28px;align-items:stretch}.feature-copy{padding:0 6px}.feature h2{font-size:34px}.feature-description{max-width:40ch;margin:15px 0 20px}.category{margin-bottom:12px}.text-link{margin-top:17px}.model-preview img{aspect-ratio:auto}.learning{padding:48px 4px}.learning h2,.about h2{font-size:29px}.topics{grid-template-columns:1fr;gap:25px;margin-top:26px}.topics p{max-width:52ch}.about{grid-template-columns:1fr;gap:30px;padding:37px 4px 45px}.about aside{padding-left:20px}.about>div>p{margin-top:15px}footer{padding:24px 20px;flex-wrap:wrap;gap:17px}footer p{flex-basis:70%}footer>a:last-child{margin-left:0}.project-page{padding-top:22px}.project-intro{display:block;padding:29px 0 30px}.project-intro h1{max-width:16ch;font-size:43px}.project-intro .lead{font-size:18px}.launch{margin-top:14px}.launch p{max-width:50ch}.project-image img{border-radius:9px}.reading{padding-top:40px;padding-bottom:55px}.reading h1{font-size:43px}html[lang=zh-CN] h1{font-size:40px;max-width:14ch}html[lang=zh-CN] .feature h2{font-size:31px}}@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}.button{transition:none}}

html[lang=zh-CN] .intro h1{max-width:none;text-wrap:initial}
