:root{color-scheme:light dark;--bg:#fff;--ink:#252525;--muted:#6b6b6b;--line:#e0e0df;--surface:#f7f7f6;--accent:#006ee6;--serif:"Wenyin Serif","Songti SC","STSong","SimSun",serif;--ui:-apple-system,BlinkMacSystemFont,"PingFang SC",sans-serif;--ease:cubic-bezier(.22,.61,.36,1)}
*{box-sizing:border-box}html{scroll-behavior:smooth;scroll-padding-top:100px}body{margin:0;background:var(--bg);color:var(--ink);font:16px/1.95 var(--serif);-webkit-font-smoothing:antialiased}a{color:inherit;text-decoration:none}button{font:inherit;cursor:pointer}button,a{touch-action:manipulation}a:focus-visible,button:focus-visible,summary:focus-visible{outline:2px solid var(--accent);outline-offset:5px}p{margin:0 0 23px}h1,h2,h3{margin:0;font-family:var(--serif);font-weight:400;line-height:1.6;letter-spacing:.01em}h1{font-size:56px}h2{font-size:34px}h3{font-size:21px}.wrap{max-width:1280px;margin:auto;padding-left:60px;padding-right:60px}.narrow{max-width:920px}.muted,.fine{color:var(--muted)}.fine{font:11px/1.8 var(--ui);margin-top:19px}.lead{font-size:23px;line-height:1.8}.skip{position:fixed;top:-100px;left:16px;z-index:100;padding:8px;background:var(--bg)}.skip:focus{top:12px}
header{background:var(--bg);position:sticky;top:0;z-index:10;border-bottom:1px solid var(--line)}.nav{height:80px;display:flex;align-items:center;gap:38px}.brand{display:flex;align-items:center;gap:10px;white-space:nowrap;font-size:27px;letter-spacing:.12em;font-weight:400}.brand picture,.brand img{display:block;width:36px;height:36px}.nav nav{display:flex;gap:30px;margin-left:auto;font-size:13px}.nav nav a{color:var(--muted);position:relative;padding:7px 0}.nav nav a:after{content:'';position:absolute;bottom:0;left:0;right:0;height:1px;background:currentColor;transform:scaleX(0);transform-origin:left;transition:transform .22s var(--ease)}.nav nav a:hover,.nav nav a[aria-current]{color:var(--ink)}.nav nav a:hover:after,.nav nav a[aria-current]:after{transform:scaleX(1)}
.button{display:inline-flex;align-items:center;justify-content:center;gap:22px;min-height:45px;padding:9px 21px;border:1px solid var(--ink);background:var(--ink);color:var(--bg);border-radius:3px;font:13px/1.6 var(--ui);transition:opacity .18s var(--ease),transform .18s var(--ease)}.button:hover{opacity:.85}.button:active{transform:translateY(1px)}.button.small{min-height:32px;padding:5px 13px;font-size:11px;border-radius:3px}.text-link{display:inline-flex;align-items:center;gap:12px;font-size:14px;border-bottom:1px solid var(--line);padding-bottom:2px}.text-link span{transition:transform .2s var(--ease)}.text-link:hover{border-color:var(--ink)}.text-link:hover span{transform:translateX(4px)}
.hero{padding-top:78px;padding-bottom:72px}.hero-copy{display:grid;grid-template-columns:.8fr 1.4fr;gap:64px;align-items:center}.hero h1{font-size:clamp(42px,4.5vw,60px);line-height:1.6;letter-spacing:.02em}.hero-description{font-size:15px;color:var(--muted);margin:23px 0 0;line-height:2.15}.actions{display:flex;align-items:center;gap:25px;flex-wrap:wrap;margin-top:30px}.hero .fine{font-size:10px;margin-bottom:0;margin-top:16px}.product-shot{margin:0;min-width:0}.product-caption{display:flex;justify-content:flex-end;align-items:center;margin-bottom:12px}.image-tabs{display:flex;align-items:center;gap:21px;width:100%}.image-tabs button{position:relative;border:0;border-bottom:1px solid transparent;background:transparent;color:var(--muted);font-size:11px;padding:4px 0;border-radius:0;transition:color .2s var(--ease),border-color .2s var(--ease)}.image-tabs button[aria-pressed=true]{color:var(--ink);border-bottom-color:var(--ink)}.image-full{margin-left:auto;color:var(--muted);font-size:10px}.screen-stage{overflow:hidden;border:1px solid var(--line);border-radius:6px;background:var(--surface);box-shadow:0 12px 36px #00000008}.product-shot img{display:block;width:100%;height:auto;aspect-ratio:1280/820;object-fit:contain}.product-shot figcaption{font:9px/1.8 var(--ui);color:var(--muted);margin-top:12px;text-align:right}
.section{padding-top:80px;padding-bottom:85px}.section-head{display:flex;align-items:end;justify-content:space-between;gap:70px;margin-bottom:48px}.section-head>p{font-size:14px;color:var(--muted);line-height:2.1;margin:0;max-width:420px}.workflow-body{display:grid;grid-template-columns:1fr 1fr;gap:110px;align-items:start}#workflow{border-top:1px solid var(--line)}.reading-sample{border-top:1px solid var(--ink);border-bottom:1px solid var(--line);padding:17px 0}.sample-heading{display:flex;align-items:center;justify-content:space-between;gap:15px;font-size:11px;color:var(--muted)}.sample-switch{display:flex;gap:17px}.sample-switch button{padding:0 0 3px;border:0;border-bottom:1px solid transparent;background:transparent;color:var(--muted);font-size:11px}.sample-switch button[aria-pressed=true]{border-bottom-color:var(--ink);color:var(--ink)}.sample-text{padding:31px 0 25px;min-height:300px;font-size:23px;line-height:2}.sample-text p{margin:0 0 16px}.sample-text p:last-child{color:var(--muted);font-size:19px;margin:0}.sample-name{position:relative;display:inline-block;color:var(--ink);padding:0 3px;white-space:nowrap;border-bottom:1px solid var(--line)}.sample-name:after{content:'';position:absolute;inset:0;background:var(--ink);transform:scaleX(0);transform-origin:left;pointer-events:none}.sample-name.changing:after{animation:conceal .32s var(--ease)}@keyframes conceal{0%{transform:scaleX(0)}45%,55%{transform:scaleX(1)}100%{transform:scaleX(0)}}.sample-foot{display:flex;justify-content:space-between;color:var(--muted);font-size:10px}.sample-foot>span:last-child{letter-spacing:.12em}.steps{list-style:none;margin:0 0 24px;padding:0}.steps li{padding:19px 0;border-bottom:1px solid var(--line)}.steps li:first-child{padding-top:0}.steps h3{font-size:21px;margin:0 0 8px}.steps p{font-size:14px;line-height:2;color:var(--muted);margin:0;max-width:390px}
.privacy-feature{border-top:1px solid var(--line);border-bottom:1px solid var(--line)}.privacy-grid{display:grid;grid-template-columns:1fr 1fr;gap:110px;padding-top:70px;padding-bottom:70px}.privacy-feature .text-link{margin-top:25px}.privacy-lines>div{display:flex;justify-content:space-between;padding:15px 0;border-bottom:1px solid var(--line);font-size:14px}.privacy-lines>div:first-child{padding-top:0}.privacy-lines strong{font-weight:400}.privacy-lines p{font-size:12px;color:var(--muted);line-height:2;margin:22px 0 0;max-width:390px}.format-table{margin-bottom:26px}.format-row{display:grid;grid-template-columns:1.3fr .65fr 1.4fr;gap:35px;align-items:center;min-height:102px;padding:23px 0;border-top:1px solid var(--line)}.format-row:last-child{border-bottom:1px solid var(--line)}.format-row h3{font-size:18px}.file-extension{display:none}.format-row>span{font-size:12px}.format-row p{font-size:13px;line-height:2;color:var(--muted);margin:0}.faq-section{border-top:1px solid var(--line)}.faq-layout{display:grid;grid-template-columns:1fr 1.5fr;gap:100px}.faq details,article details{border-bottom:1px solid var(--line)}.faq details:first-child{border-top:1px solid var(--line)}summary{position:relative;cursor:pointer;list-style:none;font-size:16px;padding:22px 32px 22px 0;line-height:1.8}summary::-webkit-details-marker{display:none}summary:after{content:'+';position:absolute;right:1px;top:22px;font-family:var(--ui);font-size:19px;font-weight:300;color:var(--muted);transition:transform .2s var(--ease)}details[open] summary:after{transform:rotate(45deg)}details p{font-size:14px;color:var(--muted);line-height:2.1;margin:0 25px 25px 0}details{overflow:hidden}.closing{display:flex;justify-content:space-between;align-items:center;gap:60px;padding-top:68px;padding-bottom:74px;border-top:1px solid var(--line)}.closing .fine{margin-bottom:0}
footer{display:grid;grid-template-columns:1fr 1fr;gap:12px 35px;border-top:1px solid var(--line);padding-top:32px;padding-bottom:30px}footer .brand{font-size:24px}footer .wordmark{font-size:11px;font-weight:400;color:var(--muted);letter-spacing:.04em;margin-left:4px}footer p{font-size:12px;color:var(--muted);margin:0}footer>div{display:flex;justify-content:flex-end;align-items:center;gap:22px;grid-column:2;grid-row:1;font-size:11px}footer small{font:10px/1.8 var(--ui);grid-column:2;grid-row:2;text-align:right;color:var(--muted)}
.page-intro{padding-top:72px;padding-bottom:57px}.page-intro h1{font-size:47px;font-weight:400}.page-intro .lead{font-size:21px;color:var(--muted);margin:25px 0 12px}.page-intro>p:not(.lead){font-size:14px;color:var(--muted)}.docs{display:grid;grid-template-columns:190px 1fr;gap:90px;padding-bottom:80px}.docs aside{display:flex;flex-direction:column;gap:10px;align-self:start;position:sticky;top:110px;font-size:13px;color:var(--muted)}.docs aside a:hover{color:var(--ink)}article section{padding-bottom:45px;scroll-margin-top:110px}article h2{font-size:28px;margin-bottom:18px}article p{font-size:16px;line-height:2.2;color:var(--muted)}.progress-group{display:grid;grid-template-columns:1fr 1.45fr;gap:110px;padding:46px 0;border-top:1px solid var(--line)}.progress-group h2{font-size:29px;margin-bottom:18px}.progress-group>div>p{font-size:14px;color:var(--muted);max-width:300px}.progress-item{padding-bottom:27px}.progress-item h3{font-size:21px;margin-bottom:8px}.progress-item p{font-size:14px;line-height:2;color:var(--muted);margin:0}.download-panel{padding:30px 0;border-top:1px solid var(--line);border-bottom:1px solid var(--line)}.download-panel h2{font-size:28px;margin-bottom:18px}.download-panel p{font-size:15px;color:var(--muted)}.download-panel .fine{font-size:11px}.compact{padding-top:55px}.plain-list{padding-left:20px;color:var(--muted)}.plain-list li{font-size:15px;line-height:2.1;padding-left:6px;margin-bottom:20px}.prose{padding-bottom:60px}
@media(prefers-color-scheme:dark){:root{--bg:#191919;--ink:#ecebe8;--muted:#a8a7a3;--line:#3d3d3b;--surface:#222;--accent:#58a5ff}.screen-stage{box-shadow:none}}
@media(max-width:1050px){.wrap{padding-left:35px;padding-right:35px}.hero-copy{gap:34px;grid-template-columns:.9fr 1.2fr}.hero h1{font-size:46px}.hero-description{font-size:13px}.actions{gap:20px}.hero .text-link{font-size:12px}.workflow-body,.privacy-grid{gap:65px}.section-head{gap:40px}.faq-layout{gap:65px}.docs{gap:50px}.progress-group{gap:60px}.sample-text{font-size:21px}.sample-text p:last-child{font-size:17px}}
@media(max-width:720px){.wrap{padding-left:25px;padding-right:25px}.nav{height:auto;min-height:66px;flex-wrap:wrap;gap:0 18px;padding-top:12px;padding-bottom:10px}.brand{font-size:25px}.brand picture,.brand img{width:31px;height:31px}.nav>.button{margin-left:auto}.nav nav{order:3;width:100%;margin:7px 0 0;gap:26px;font-size:12px}.nav nav a{padding:2px 0}.button.small{font-size:10px;min-height:30px}.hero{padding-top:38px;padding-bottom:43px}.hero-copy{display:block}.hero h1{font-size:clamp(38px,9vw,50px);line-height:1.55}.hero-description{font-size:14px;margin-top:17px}.actions{margin-top:22px;gap:25px}.hero .fine{font-size:9px;margin-top:14px}.product-shot{margin-top:34px}.product-caption{margin-bottom:10px}.image-tabs{gap:24px}.image-tabs button{font-size:11px}.screen-stage{margin-left:-10px;margin-right:-10px;border-radius:4px}.product-shot figcaption{text-align:left;font-size:8px;margin-top:10px;line-height:1.9}.section{padding-top:50px;padding-bottom:52px}h2{font-size:29px}.section-head{display:block;margin-bottom:30px}.section-head>p{font-size:13px;margin-top:18px}.workflow-body{display:flex;flex-direction:column;gap:35px}.workflow-body>div{width:100%}.reading-sample{padding:15px 0}.sample-text{font-size:22px;min-height:270px;padding:23px 0}.sample-text p:last-child{font-size:18px}.sample-heading,.sample-switch button{font-size:10px}.sample-foot{font-size:9px}.steps h3{font-size:20px}.steps p{font-size:14px;max-width:none}.steps li{padding:19px 0}.privacy-grid{display:block;padding-top:45px;padding-bottom:45px}.privacy-feature .text-link{margin-top:21px}.privacy-lines{margin-top:30px}.privacy-lines>div{font-size:13px}.privacy-lines p{font-size:12px}.format-row{grid-template-columns:1.4fr .75fr;gap:12px 15px;min-height:0;padding:23px 0}.format-row h3{font-size:17px}.format-row>span{font-size:11px;text-align:right}.format-row p{grid-column:1/-1;font-size:13px}.faq-layout{display:block}.faq{margin-top:27px}summary{font-size:14px;padding:20px 28px 20px 0}summary:after{top:20px}details p{font-size:13px;margin-right:12px}.closing{display:block;padding-top:45px;padding-bottom:48px}.closing>div+div{margin-top:23px}.closing .fine{font-size:10px}footer{display:flex;flex-direction:column;gap:13px;padding-top:25px;padding-bottom:26px}footer>div{justify-content:flex-start;flex-wrap:wrap;gap:18px}footer small{text-align:left}.page-intro{padding-top:42px;padding-bottom:35px}.page-intro h1{font-size:37px}.page-intro .lead{font-size:18px;margin-top:18px}.docs{display:block}.docs aside{position:static;flex-flow:row wrap;gap:8px 18px;padding-bottom:24px;margin-bottom:30px;border-bottom:1px solid var(--line);font-size:12px}article h2{font-size:25px}article p{font-size:15px}.progress-group{display:block;padding:30px 0}.progress-group h2{font-size:27px}.progress-group>div>p{max-width:none}.progress-group>div+div{margin-top:25px}.progress-item h3{font-size:20px}.progress-item p{font-size:14px}.download-panel h2{font-size:25px}.download-panel p{font-size:14px}.plain-list li{font-size:14px}.compact{padding-top:38px}}
@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}*,*:before,*:after{animation:none!important;transition:none!important}}