/* Native static site. Design variance 5, motion 2, visual density 3. */
:root{font-family:"Segoe UI","PingFang SC","Microsoft YaHei",sans-serif;--page:#fff;--ink:#172b3a;--muted:#657482;--line:#e4e9ef;--soft:#f6f8fb;--blue:#1677ff;--action:#0960d9;--radius:14px;color-scheme:light}*{box-sizing:border-box}html{scroll-behavior:smooth;scroll-padding-top:90px}body{margin:0;color:var(--ink);background:var(--page);line-height:1.8;font-size:15px}a{color:inherit;text-decoration:none}button{font:inherit;color:inherit;cursor:pointer}a:focus-visible,button:focus-visible,summary:focus-visible{outline:3px solid var(--blue);outline-offset:5px}.container{width:min(1160px,calc(100% - 64px));margin-inline:auto}.site-header{height:82px;border-bottom:1px solid var(--line);background:var(--page)}.header-inner{height:100%;display:flex;align-items:center;justify-content:space-between}.wordmark{display:flex;align-items:center;gap:10px;font-weight:700;font-size:25px;letter-spacing:1px}.wordmark img{object-fit:contain}.header-inner nav{display:flex;align-items:center;gap:34px;font-size:14px}.header-inner nav>a:hover,.text-link:hover,.site-footer a:hover{color:var(--action)}.theme-switch{border:1px solid var(--line);border-radius:8px;background:transparent;font-size:12px;padding:5px 10px;white-space:nowrap}.theme-switch:hover{background:var(--soft)}.hero{display:grid;grid-template-columns:1.1fr .9fr;gap:36px;align-items:center;padding-block:76px 80px}.eyebrow{font-size:14px;color:var(--muted);margin:0 0 20px}.hero h1{font-size:clamp(42px,4.7vw,62px);line-height:1.3;letter-spacing:-2px;margin:0 0 24px;font-weight:700}.hero-description{font-size:17px;color:var(--muted);max-width:440px;margin:0 0 32px}.button{display:inline-flex;align-items:center;justify-content:center;gap:28px;padding:12px 22px;border-radius:8px;font-size:14px;font-weight:600;white-space:nowrap;border:1px solid transparent}.primary{color:white;background:var(--action)}.primary:hover{background:#084eb2}.secondary{border-color:var(--line);background:var(--page)}.secondary:hover{background:var(--soft)}.hero-art{display:grid;place-items:center;background:var(--soft);border-radius:var(--radius);aspect-ratio:1/1}.hero-art img{width:85%;height:auto;object-fit:contain}.section-heading{margin-bottom:36px}.section-heading h2,h2{font-size:30px;line-height:1.4;letter-spacing:-.7px;margin:0 0 12px}.section-heading p,.muted{color:var(--muted)}.section-heading p{margin:0;font-size:15px}.products{padding-block:48px 76px;border-top:1px solid var(--line)}.product-feature{display:grid;grid-template-columns:.85fr 1.15fr;gap:42px;align-items:center;padding:40px;background:var(--soft);border-radius:var(--radius)}.product-icon{display:block;object-fit:contain;margin:0 0 16px}.product-title{display:flex;gap:12px;align-items:center;flex-wrap:wrap}.product-title h3{font-size:24px;line-height:1.4;margin:0;letter-spacing:-.5px}.status{font-size:11px;padding:3px 8px;border:1px solid var(--line);border-radius:5px;color:var(--muted);white-space:nowrap}.product-summary{font-size:26px;line-height:1.6;font-weight:600;letter-spacing:-.7px;margin:20px 0 14px}.product-copy>.muted{font-size:14px;margin:0;max-width:350px}.feature-points{display:flex;gap:16px;flex-wrap:wrap;font-size:12px;color:var(--muted);margin:20px 0 27px}.feature-points span+span{border-left:1px solid var(--line);padding-left:16px}.text-link{font-weight:600;color:var(--action);font-size:14px;display:inline-flex;gap:12px;align-items:center}.product-visual{margin:0;min-width:0}.product-visual img{display:block;width:100%;height:auto;box-shadow:0 12px 34px #172b3a0c;border:1px solid #e5eaf0;border-radius:8px;background:#f7f9fb}.product-visual figcaption{font-size:11px;color:var(--muted);margin:12px 0 0;text-align:center}.future-product{padding:26px 4px 0;display:flex;justify-content:space-between;align-items:center;gap:25px}.future-product p{font-size:16px;font-weight:600;margin:0}.future-product span{font-size:13px;color:var(--muted)}.about{border-block:1px solid var(--line);padding-block:70px;display:grid;grid-template-columns:1fr 1fr;gap:75px}.about-statement{font-size:21px;margin:20px 0 0;max-width:350px;line-height:1.7}.about-copy p{font-size:15px;color:var(--muted);margin:0 0 18px}.faq{padding-block:70px 85px;max-width:840px}.faq .section-heading{margin-bottom:24px}.faq details{border-bottom:1px solid var(--line);padding:21px 0}.faq summary{list-style:none;cursor:pointer;font-size:16px;font-weight:500;padding-right:30px;position:relative}.faq summary::-webkit-details-marker{display:none}.faq summary:after{content:"+";position:absolute;right:5px;top:0;font-size:21px;font-weight:400;color:var(--muted)}.faq details[open] summary:after{content:"−"}.faq details p{color:var(--muted);font-size:14px;max-width:730px;margin:14px 0 0}.site-footer{border-top:1px solid var(--line)}.footer-inner{min-height:110px;display:flex;gap:25px;align-items:center;justify-content:space-between;font-size:12px;color:var(--muted)}.wordmark.small{font-size:19px;color:var(--ink)}.footer-inner>div{display:flex;gap:24px}.skip{position:fixed;top:-80px;left:20px;padding:10px 20px;background:var(--page);z-index:10}.skip:focus{top:10px}.tool-main{max-width:1040px}.back-link{display:inline-block;font-size:13px;color:var(--muted);margin:32px 0 26px}.back-link:hover{color:var(--action)}.tool-intro{padding-bottom:36px;max-width:760px}.tool-intro h1{font-size:42px;letter-spacing:-1.5px;line-height:1.4;margin:0}.large{margin-bottom:20px}.tool-tagline{font-size:24px;font-weight:500;margin:20px 0 12px}.tool-intro>.muted{font-size:15px;margin:0 0 24px}.release-notice{background:var(--soft);border-left:3px solid var(--blue);padding:14px 18px;font-size:13px;color:var(--muted)}.tool-screenshot{margin:0 0 60px}.tool-screenshot img{width:100%;height:auto;border-radius:var(--radius);border:1px solid var(--line);display:block}.tool-screenshot figcaption{font-size:12px;color:var(--muted);margin:12px 0 0}.tool-section{padding:42px 0;border-top:1px solid var(--line)}.workflow{display:grid;grid-template-columns:repeat(3,1fr);gap:35px;margin-top:30px}.workflow article>span{font-size:12px;color:var(--action)}.workflow h3{font-size:18px;margin:10px 0 12px;line-height:1.6}.workflow p{font-size:14px;color:var(--muted);margin:0}.boundary{display:grid;grid-template-columns:.85fr 1.15fr;gap:55px}.boundary p{color:var(--muted);font-size:14px;margin:0 0 14px}.tool-next{padding-block:48px 70px}.tool-next h2{font-size:27px}.tool-next p{margin:12px 0 24px}.policy{max-width:800px;padding-block:60px 80px}.policy h1{font-size:38px;letter-spacing:-1px;margin:0 0 12px}.policy h2{font-size:21px;margin:38px 0 15px}.policy p{font-size:15px;color:var(--muted)}.policy .text-link{margin-top:24px}.toast{position:fixed;bottom:20px;left:50%;transform:translateX(-50%);border-radius:8px;padding:12px 20px;background:var(--ink);color:var(--page);font-size:13px;z-index:8}.toast[hidden]{display:none}
html[data-theme="dark"]{--page:#17202c;--ink:#eaf0f7;--muted:#a8b6c6;--line:#344154;--soft:#202c3b;--action:#85b7ff;color-scheme:dark}html[data-theme="dark"] .primary{background:#0960d9;color:#fff}html[data-theme="dark"] .hero-art{background:#edf2fa}html[data-theme="dark"] .wordmark img,html[data-theme="dark"] .product-icon{background:#edf2fa;border-radius:8px}html[data-theme="dark"] .product-visual img{box-shadow:none;border-color:#415169}
@media(max-width:1000px){.container{width:calc(100% - 48px)}.hero{padding-block:52px;gap:20px}.hero h1{font-size:47px}.product-feature{padding:30px;gap:25px}.product-summary{font-size:23px}.product-title h3{font-size:21px}.about{gap:40px}.feature-points{gap:10px}.feature-points span+span{padding-left:10px}}
@media(max-width:740px){.container{width:calc(100% - 40px)}.site-header{height:68px}.wordmark{font-size:21px;gap:7px}.wordmark img{width:30px;height:30px}.header-inner nav{gap:18px;font-size:12px}.theme-switch{font-size:11px;padding:4px 7px}.hero{grid-template-columns:1fr;padding-block:44px 34px;gap:30px}.hero h1{font-size:43px;letter-spacing:-1.5px;margin-bottom:18px}.hero-description{font-size:15px;margin-bottom:25px;max-width:315px}.eyebrow{font-size:12px;margin-bottom:16px}.hero-art{aspect-ratio:1.65}.hero-art img{height:205px;width:205px}.products{padding-block:35px 45px}.section-heading h2,h2{font-size:25px}.section-heading{margin-bottom:24px}.section-heading p{font-size:13px}.product-feature{grid-template-columns:1fr;padding:25px 22px;gap:30px}.product-summary{font-size:24px}.product-copy>.muted{max-width:none}.product-icon{width:68px;height:68px}.feature-points{font-size:11px;margin:18px 0 22px}.future-product{display:block}.future-product span{display:block;margin-top:7px;max-width:290px}.about{grid-template-columns:1fr;gap:24px;padding-block:40px}.about-statement{font-size:19px;margin:14px 0 0}.about-copy p{font-size:14px}.faq{padding-block:40px 50px}.faq summary{font-size:14px}.faq details p{font-size:13px}.footer-inner{padding-block:22px;display:flex;flex-wrap:wrap;gap:15px}.footer-inner>span{width:100%;order:3}.footer-inner>div{gap:16px;margin-left:auto}.wordmark.small img{width:24px;height:24px}.tool-intro h1{font-size:32px}.tool-tagline{font-size:20px}.tool-intro .large{width:90px;height:90px}.back-link{margin:22px 0}.tool-intro{padding-bottom:28px}.tool-screenshot{margin-bottom:35px}.workflow{grid-template-columns:1fr;gap:26px}.workflow h3{margin:5px 0 8px}.boundary{grid-template-columns:1fr;gap:12px}.tool-section{padding-block:30px}.tool-next{padding-bottom:45px}.policy{padding-block:35px 50px}.policy h1{font-size:31px}}
@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}*{animation:none!important;transition:none!important}}

.footer-inner{flex-wrap:wrap;padding-block:24px;min-height:110px}.footer-inner>a{white-space:nowrap}.faq details p .text-link{display:block;margin-top:10px}

.math-visual{padding:28px;border:1px solid var(--line);border-radius:12px;background:var(--page)}.math-visual>figcaption{text-align:left;margin:0 0 24px;font-size:12px;color:var(--action)}.math-process>div{padding:14px 18px;border-left:2px solid var(--blue);background:var(--soft)}.math-process>div>span{font-size:11px;color:var(--muted);display:block}.math-process strong{display:block;font-size:19px;line-height:1.6;margin-top:4px}.math-process p{font-size:13px;color:var(--muted);margin:5px 0 0}.math-arrow{display:block;text-align:center;color:var(--muted);line-height:1.5;margin:6px 0}@media(max-width:740px){.math-visual{padding:20px}.math-process strong{font-size:17px}.tool-intro .button{white-space:normal}}