:root{--paper:#e7e4dc;--paper-deep:#d7d4ca;--ink:#171916;--muted:#61645a;--orange:#e85b24;--green:#34725d;--screen:#cbd3c3;--line:#a3a195;--mono:Consolas,"Courier New",monospace;--sans:"Segoe UI","Microsoft YaHei",sans-serif}
*{box-sizing:border-box}html{scroll-behavior:smooth;scroll-padding-top:100px;background:var(--paper)}body{margin:0;color:var(--ink);font:16px/1.7 var(--sans);background:linear-gradient(#17191604 1px,transparent 1px),var(--paper);background-size:100% 30px}button,a{-webkit-tap-highlight-color:transparent;touch-action:manipulation}button{font:inherit;color:inherit;cursor:pointer}a{color:inherit}button:focus-visible,a:focus-visible,summary:focus-visible{outline:3px solid #155eef;outline-offset:5px}[hidden]{display:none!important}button:disabled{opacity:.5;cursor:not-allowed}.page-width{width:min(1240px,calc(100% - 112px));margin-inline:auto}.mono,.eyebrow{font:12px/1.6 var(--mono);letter-spacing:.035em}.eyebrow{color:var(--muted);margin:0 0 24px;display:flex;align-items:center;gap:9px}.tiny-dot,.brand-dot{display:inline-block;flex-shrink:0;width:8px;height:8px;border-radius:50%;background:var(--orange)}.brand-dot{width:12px;height:12px}.brand{font:700 12px/1.5 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p{font-size:12px;line-height:1.8;margin:0}.sample-deadline{display:grid;grid-template-columns:29px 1fr;gap:12px;padding:11px 13px}.sample-deadline strong{font-size:12px;font-weight:650}.sample-source{display:flex;justify-content:space-between;gap:16px;border-top:1px solid #c2c2b5;margin-top:6px;padding-top:11px;font-size:10px;color:var(--muted)}.demo-disclaimer{font-size:10px;color:var(--muted);line-height:1.8;margin:16px 0 0}.trust-strip{display:flex;justify-content:space-between;gap:24px;align-items:center;padding:25px 0;border-top:1px solid var(--ink);border-bottom:1px solid var(--line)}.trust-strip>span{display:flex;align-items:center;gap:11px;font-size:12px}.trust-strip i{width:6px;height:6px;flex-shrink:0;border-radius:50%;background:var(--green)}.section-space{padding-top:88px;padding-bottom:88px}.section-title h2{font-size:clamp(29px,3.15vw,43px);line-height:1.35;letter-spacing:-.05em;margin:0 0 18px}.section-title>p:last-child{font-size:14px;color:var(--muted);line-height:1.9;max-width:560px;margin:0}.feature-rows{margin-top:44px}.feature-row{display:grid;grid-template-columns:40px minmax(0,1fr) 300px;gap:26px 34px;padding:34px 0;border-top:1px solid var(--line);align-items:center}.feature-index{font:12px var(--mono);color:var(--orange);align-self:start;padding-top:5px}.feature-row h3{font-size:22px;line-height:1.5;letter-spacing:-.025em;margin:0 0 10px}.feature-row>div>p{font-size:13px;line-height:1.95;color:var(--muted);max-width:510px;margin:0}.category-stack{display:grid;grid-template-columns:1fr 1fr;gap:9px}.category{border:1px solid var(--line);padding:11px 12px;font-size:12px;text-align:center}.category.academic{border-color:var(--green);color:var(--green);background:#d8e0d1}.category.high{border-color:#bf5b35;color:#a4421e}.range-example{border:1px solid var(--line);padding:17px 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0;display:flex;flex-direction:column;align-items:flex-start}.step+.step{padding-left:23px}.step:last-child{border:0;padding-right:0}.step-number{font:12px var(--mono);color:#f58c5b}.step h3{font-size:20px;line-height:1.5;margin:28px 0 13px;letter-spacing:-.025em}.step p{font-size:12px;line-height:1.95;color:#c2c5b9;margin:0 0 23px}.step-tag{font-size:10px;line-height:1.7;padding:5px 8px;border:1px solid #6c7461;color:#d3ddc7;margin-top:auto}.step-link{text-decoration:none}.step-link:hover{background:#30382b}.guide-bottom{display:flex;align-items:center;gap:11px;padding-top:20px}.guide-bottom .tiny-dot{background:#85a477;width:6px;height:6px}.guide-bottom p{font-size:11px;line-height:1.8;margin:0;color:#aeb5a5}.privacy-section{display:grid;grid-template-columns:1fr 1.12fr;gap:110px;border-bottom:1px solid var(--line)}.privacy-intro h2,.download-section h2{font-size:clamp(36px,4.7vw,64px);line-height:1.25;letter-spacing:-.055em;white-space:pre-line;margin:0 0 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p{font-size:13px;line-height:1.95;margin:0 25px 22px 0;color:var(--muted)}.download-section{padding:88px 0 90px;display:grid;grid-template-columns:1fr 1fr;gap:110px;align-items:center}.download-section>div>p:last-child{font-size:15px;line-height:1.9;color:var(--muted);white-space:pre-line}.download-panel{border:1px solid var(--ink);background:#efede5;padding:27px}.download-panel-head{display:flex;align-items:center;gap:13px;margin-bottom:25px}.download-panel-head>div{display:flex;flex-direction:column;gap:4px}.download-panel-head strong{font-size:15px}.download-panel-head>div>span{font:9px var(--mono);color:var(--muted)}.release-label{font:10px var(--mono);margin-left:auto;color:var(--muted)}.download-main{display:flex;width:100%;justify-content:space-between}.download-status{font-size:10px;line-height:1.8;color:var(--muted);margin:10px 0 20px}.download-status.available{color:var(--green)}.release-facts{margin:0;border-top:1px solid var(--line)}.release-facts>div{display:flex;justify-content:space-between;gap:25px;font-size:11px;padding:10px 0;border-bottom:1px solid #c2c1b5}.release-facts dt{color:var(--muted)}.release-facts dd{margin:0;text-align:right}.checksum-row{display:flex;justify-content:space-between;align-items:center;gap:14px;margin-top:20px;font:10px var(--mono);color:var(--muted)}.checksum-row button{border:0;border-bottom:1px solid var(--line);background:none;font-size:10px;padding:3px 0}#checksum{display:block;overflow-wrap:anywhere;font:10px/1.8 var(--mono);color:#727768;margin-top:8px}.download-panel .download-fineprint{font-size:10px;line-height:1.8;margin:17px 0 0;color:var(--muted)}.site-footer{border-top:1px solid var(--line);display:flex;align-items:center;gap:25px;padding:26px 0 35px}.site-footer p{font-size:11px;color:var(--muted)}.site-footer>a:not(.brand){font-size:11px}.footer-edition{font:9px var(--mono);color:var(--muted);margin-left:auto}.skip-link{position:fixed;left:15px;top:-100px;z-index:100;background:var(--ink);color:var(--paper);padding:10px 20px}.skip-link:focus{top:15px}dialog{background:var(--paper);border:1px solid var(--ink);padding:38px;max-width:min(470px,calc(100% - 32px));color:var(--ink)}dialog::backdrop{background:#17191688}dialog h2{font-size:28px;line-height:1.5;letter-spacing:-.03em;margin:0 0 15px}dialog>p:not(.eyebrow){font-size:14px;color:var(--muted);line-height:1.9;margin-bottom:25px}.dialog-close{position:absolute;right:12px;top:9px;border:0;background:none;font-size:24px;padding:3px 8px}.site-notice{position:fixed;bottom:24px;left:50%;transform:translateX(-50%);background:var(--ink);color:var(--paper);border:1px solid var(--paper);padding:13px 20px;z-index:100;font-size:12px;max-width:calc(100% - 30px);box-shadow:4px 4px 0 #17191625}.noscript-note{padding:15px 30px;text-align:center;font-size:12px}
html[lang=en] .hero h1{font-size:clamp(49px,6.35vw,90px);letter-spacing:-.065em}html[lang=en] .demo-tabs button{font-size:10px;white-space:normal;line-height:1.4}html[lang=en] .demo-mail{min-height:295px}html[lang=en] .category{font-size:11px}html[lang=en] .step h3{font-size:19px}
@media(min-width:1600px){.hero{padding-top:105px;padding-bottom:78px}}
@media(max-width:1100px){.page-width{width:calc(100% - 72px)}.site-header{padding:0 28px;gap:24px}.top-nav{gap:20px}.header-actions{gap:18px}.hero{gap:40px;padding-top:65px}.hero-description{font-size:14px}.hero-actions{gap:17px}.button-large{font-size:13px;padding-inline:18px;gap:16px}.demo-content{padding:18px}.demo-tabs button{font-size:10px}.feature-row{grid-template-columns:30px minmax(0,1fr) 260px;gap:25px}.privacy-section,.download-section{gap:65px}.faq-section{gap:50px}.step h3{font-size:18px}.step p{font-size:11px}.site-footer{gap:18px}.site-footer .brand{font-size:11px}}
@media(max-width:850px){.top-nav{display:none}.header-actions{margin-left:auto}.site-header{height:70px}.hero{grid-template-columns:1fr 1fr;gap:28px;padding-top:55px}.hero h1{font-size:49px}.hero-actions{align-items:flex-start;flex-direction:column;gap:8px}.hero-footnote{margin-top:30px}.demo-content{padding:15px}.demo-readout{padding:15px}.demo-readout p{font-size:17px}.demo-titlebar{padding:0 15px}.demo-tabs{grid-template-columns:1fr 1fr;gap:0}.demo-mail h2{font-size:20px}.sample-source{flex-direction:column;gap:3px}.trust-strip{gap:20px;align-items:flex-start}.trust-strip>span{font-size:11px;gap:7px}.feature-row{grid-template-columns:25px minmax(0,1fr) 225px;gap:20px}.feature-row h3{font-size:20px}.feature-row>div>p{font-size:12px}.steps-grid{grid-template-columns:1fr 1fr}.step{padding:25px 25px 28px!important;border-bottom:1px solid #62675b}.step:nth-child(odd){padding-left:0!important}.step:nth-child(even){border-right:0}.step:nth-child(n+3){border-bottom:0}.step h3{font-size:21px;margin-top:22px}.step p{font-size:12px}.privacy-section{gap:40px}.privacy-list>div{grid-template-columns:1fr;gap:8px;padding:19px 0}.faq-section{grid-template-columns:1fr;gap:30px}.faq-section h2{max-width:none;font-size:34px}.download-section{gap:40px}.download-panel{padding:22px}.release-label{display:none}.site-footer{flex-wrap:wrap}.footer-edition{width:100%;margin-left:0}.section-space{padding-block:65px}}
@media(max-width:620px){html{scroll-padding-top:85px}.page-width{width:calc(100% - 40px)}.site-header{height:66px;padding:0 20px;gap:12px}.brand{font-size:10px;gap:8px}.brand i{display:none}.brand-dot{width:10px;height:10px}.header-actions{gap:13px}.language-button{font-size:10px}.header-download{font-size:10px;padding:10px 12px;gap:12px;min-height:36px}.hero{grid-template-columns:1fr;gap:40px;padding-top:46px;padding-bottom:42px}.hero h1{font-size:clamp(48px,12vw,70px);margin-bottom:24px}.hero-description{font-size:14px;max-width:32em;margin-bottom:24px}.hero-actions{flex-direction:row;align-items:center;gap:22px}.hero-actions .button-large{padding-inline:18px;gap:14px;font-size:12px}.quiet-link{font-size:12px;gap:12px}.hero-footnote{max-width:none;margin-top:29px}.system-note{font-size:10px}.eyebrow{font-size:10px;margin-bottom:22px}.product-demo{box-shadow:6px 6px 0 #d1d0c5;transform:none}.demo-content{padding:20px}.demo-readout{padding:18px}.demo-readout p{font-size:20px}.demo-tabs{grid-template-columns:repeat(4,1fr)}.demo-tabs button{font-size:10px}.demo-mail{min-height:255px}.sample-source{flex-direction:row}.trust-strip{flex-direction:column;gap:15px;padding-block:22px}.trust-strip>span{font-size:12px;gap:12px}.section-space{padding-block:54px}.section-title h2{font-size:29px}.section-title>p:last-child{font-size:13px}.feature-rows{margin-top:29px}.feature-row{grid-template-columns:22px minmax(0,1fr);gap:14px;padding-block:27px}.feature-row>div:last-child{grid-column:2;margin-top:4px}.feature-row h3{font-size:21px}.feature-row>div>p{font-size:13px}.category-stack{max-width:300px}.range-example{max-width:340px}.export-example{margin-top:9px}.guide-section{padding-top:50px}.steps-grid{margin-top:30px}.step{padding:24px 15px 26px!important}.step:nth-child(even){padding-right:0!important;padding-left:16px!important}.step h3{font-size:18px;margin-top:20px}.step p{font-size:11px}.step-tag{font-size:9px;padding:4px 6px}.guide-bottom{align-items:flex-start}.guide-bottom .tiny-dot{margin-top:7px}.privacy-section,.download-section{grid-template-columns:1fr;gap:30px}.privacy-intro h2,.download-section h2{font-size:45px;margin-bottom:20px}.privacy-intro>p:last-child{font-size:13px;max-width:none}.privacy-list>div{grid-template-columns:75px 1fr;gap:16px}.privacy-list dt,.privacy-list dd{font-size:12px}.faq-section{gap:22px}.faq-section h2{font-size:29px}.faq-list summary{font-size:13px;padding-block:19px}.faq-list details p{font-size:12px}.download-section{padding-block:55px}.download-section>div>p:last-child{font-size:14px}.download-panel{padding:22px}.download-panel-head strong{font-size:14px}.download-panel-head img{width:40px;height:40px}.site-footer{gap:10px 18px;padding-block:24px}.site-footer p{font-size:10px;margin:0}.footer-edition{font-size:9px}.site-footer .brand{font-size:10px}html[lang=en] .hero h1{font-size:62px}html[lang=en] .step h3{font-size:17px}html[lang=en] .step-tag{font-size:9px}dialog{padding:32px 25px}.site-notice{bottom:16px}}
.campus-section{border-bottom:1px solid var(--line)}
.campus-section .section-title>p:last-child{max-width:690px}
.campus-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:36px;margin-top:36px}
.campus-grid article{border-top:2px solid var(--green);padding-top:20px;min-width:0}
.campus-number{font:10px var(--mono);color:var(--green)}
.campus-grid h3{font-size:22px;letter-spacing:-.025em;margin:16px 0 10px}
.campus-grid p{font-size:14px;color:var(--muted);line-height:1.9;margin:0;max-width:28em}
.independent-note{font-size:11px;color:var(--muted);line-height:1.8;margin-top:-12px;margin-bottom:28px}
.site-footer{flex-wrap:wrap}
.author-info{flex-basis:100%;display:flex;align-items:center;flex-wrap:wrap;gap:8px 20px;border-top:1px solid var(--line);padding-top:18px;font-size:12px}
.author-info>span{color:var(--muted)}
.author-info strong{color:var(--ink);font-weight:600;margin-left:8px}
.author-info a{overflow-wrap:anywhere;text-underline-offset:4px}
.author-info a:hover{color:var(--orange)}
.faq-list details{overflow:hidden}
.faq-list summary:after{transition:transform .26s cubic-bezier(.2,.65,.3,1)}
.faq-list details[open] summary:after{content:"+";transform:rotate(45deg)}
.hero-copy,.campus-grid article,.feature-row,.step{min-width:0}
.brand i{font-size:10px;font-weight:400}
.brand [data-i18n="digest.appName"]{font-family:var(--sans);font-size:14px;letter-spacing:0}
.hero .eyebrow{line-height:1.8;max-width:36em;align-items:baseline}
.hero .eyebrow .tiny-dot{align-self:center}
.button>span[aria-hidden]{transition:transform .2s ease}
@media(hover:hover){.button:hover>span[aria-hidden]{transform:translate(2px,-2px)}}
@keyframes reveal-rise{from{opacity:0;translate:0 16px}to{opacity:1;translate:0 0}}
.is-revealed{animation:reveal-rise .6s cubic-bezier(.2,.65,.3,1) both}
.campus-grid article:nth-child(2).is-revealed,.step:nth-child(2).is-revealed{animation-delay:60ms}
.campus-grid article:nth-child(3).is-revealed,.step:nth-child(3).is-revealed{animation-delay:120ms}
.step:nth-child(4).is-revealed{animation-delay:180ms}
@media(max-width:1100px){.site-header .brand i{display:none}}
@media(max-width:620px){
  .site-header{padding-inline:16px;gap:12px}
  .site-header .brand{white-space:normal;min-width:0;gap:8px}
  .site-header .brand [data-i18n="digest.appName"]{font-size:12px;line-height:1.35}
  .site-header .header-actions{flex-shrink:0;gap:12px}
  .header-download{min-height:44px;padding-inline:10px;gap:7px}
  .language-button{min-width:28px;min-height:44px}
  .campus-grid{grid-template-columns:1fr;gap:26px;margin-top:28px}
  .campus-grid article{padding-top:16px}
  .campus-grid h3{font-size:21px;margin-top:10px}
  .campus-grid p{font-size:14px;max-width:none}
  .privacy-intro h2,.download-section h2{font-size:clamp(28px,8.3vw,45px)}
  .independent-note{font-size:11px;margin-top:0}
  .demo-tabs button{min-height:44px;white-space:normal;line-height:1.5}
  .sample-summary,.sample-action p,.sample-deadline strong{font-size:13px}
  .demo-mail{min-height:280px}
  .step p{font-size:13px}
  .privacy-list dd,.faq-list details p{font-size:13px}
  .release-facts>div{flex-wrap:wrap;gap:5px 14px}
  .release-facts dd{overflow-wrap:anywhere;max-width:100%}
  .checksum-row button{min-height:44px}
  html[lang=en] .header-download{font-size:10px;max-width:118px}
  html[lang=en] .site-header .brand [data-i18n="digest.appName"]{max-width:112px;font-size:11px}
}
@media(max-width:420px){
  .steps-grid{grid-template-columns:1fr}
  .steps-grid .step{padding:24px 0!important;border-right:0;border-bottom:1px solid #62675b}
  .steps-grid .step:last-child{border-bottom:0}
  .step h3{font-size:21px;margin-top:14px}
  html[lang=en] .step h3{font-size:21px}
  .step p{margin-bottom:16px}
  .step-tag,html[lang=en] .step-tag{font-size:11px}
  .hero-actions{gap:12px 20px}
  .privacy-list>div{grid-template-columns:1fr;gap:6px}
  .sample-source{flex-wrap:wrap;gap:4px 12px}
}
@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}*,*:before,*:after{transition:none!important;animation:none!important}}