:root{color-scheme:light dark;--paper:#f8f7f4;--soft:#eeede8;--ink:#242321;--muted:#62615c;--line:#d6d4cd;--accent:#c72e29;--button:#b92a25;--button-hover:#99221e;--rail:1320px;--gutter:clamp(22px,4.5vw,72px);font-family:Inter,ui-sans-serif,-apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif}
*{box-sizing:border-box}html{scroll-behavior:smooth;scroll-padding-top:100px}body{margin:0;background:var(--paper);color:var(--ink);font-size:16px;line-height:1.6;-webkit-font-smoothing:antialiased}a{color:inherit;text-underline-offset:5px}button{font:inherit}a,button,summary{-webkit-tap-highlight-color:transparent}a:focus-visible,button:focus-visible,summary:focus-visible{outline:3px solid var(--accent);outline-offset:5px}button,a{touch-action:manipulation}p,h1,h2,h3,figure{margin:0}h2,h3{text-wrap:balance}img{display:block;max-width:100%}.section{max-width:var(--rail);margin-inline:auto;padding-inline:var(--gutter)}.skip-link{position:fixed;top:8px;left:12px;z-index:10;padding:10px 16px;background:var(--ink);color:var(--paper);transform:translateY(-160%)}.skip-link:focus{transform:none}
.site-header{min-height:80px;display:flex;align-items:center;justify-content:space-between;gap:24px;padding:16px var(--gutter);border-bottom:1px solid var(--line)}.wordmark{display:flex;align-items:center;gap:10px;text-decoration:none;font-size:14px;font-weight:650;letter-spacing:-.025em}.wordmark img{border-radius:7px}.site-header nav{display:flex;align-items:center;gap:30px}.nav-link{display:inline-flex;align-items:center;font-size:13px;text-decoration:none}.nav-link:hover{text-decoration:underline}
.hero{width:100%;padding:68px 0 88px;overflow:hidden}.hero-inner{max-width:1536px;margin:auto;padding-inline:var(--gutter);display:grid;grid-template-columns:minmax(380px,.85fr) minmax(0,1.15fr);align-items:center;gap:clamp(30px,4vw,70px)}.eyebrow{font-size:11px;line-height:1.5;letter-spacing:.11em;text-transform:uppercase;font-weight:650;color:var(--accent)}.hero h1{position:relative;display:table;max-width:100%;overflow-wrap:anywhere;font-size:clamp(68px,7.25vw,108px);line-height:.98;letter-spacing:-.06em;font-weight:650;margin:22px 0 28px}.hero h1 span{display:block}.hero h1 i{position:absolute;right:-23px;top:3px;width:20px;height:20px;border-top:3px solid var(--accent);border-right:3px solid var(--accent)}.promise{font-size:clamp(18px,1.7vw,24px);font-weight:550;line-height:1.35;letter-spacing:-.025em}.intro{max-width:420px;font-size:15px;color:var(--muted);margin-top:12px;line-height:1.7}.actions{display:flex;align-items:center;flex-wrap:wrap;gap:24px;margin-top:27px}.button{display:inline-flex;align-items:center;justify-content:center;min-height:48px;padding:12px 22px;background:var(--button);color:#fff;border-radius:5px;text-decoration:none;font-size:13px;font-weight:600;transition:background-color .18s ease,transform .18s ease}.button:hover{background:var(--button-hover);transform:translateY(-2px)}.button:active{transform:translateY(0)}.text-link{font-size:13px;font-weight:550;text-decoration-thickness:1px}.text-link:hover{color:var(--accent)}.fine-print{font-size:11px;color:var(--muted);margin-top:15px}.product-shot{min-width:0}.screenshot{display:block;position:relative;aspect-ratio:1120/616;overflow:hidden;border-radius:10px;border:1px solid #d8d8d7;background:#fff;outline-offset:5px;transition:transform .3s cubic-bezier(.2,.7,.2,1)}.screenshot img{position:absolute;max-width:none;width:114.285715%;height:auto;left:-7.142857%;top:-28.733766%}.screenshot:hover{transform:translateY(-3px)}figcaption{display:flex;justify-content:space-between;gap:14px;align-items:start;margin-top:13px;font-size:11px;line-height:1.6;color:var(--muted)}figcaption>a{display:grid;place-items:center;min-width:24px;min-height:24px;text-decoration:none;font-size:17px;line-height:1;margin-top:-3px}.hero-shot{padding-top:30px}.hero-shot .screenshot{box-shadow:0 16px 48px #25231e0c}
.workflow{padding-top:70px;padding-bottom:80px;border-top:1px solid var(--line)}.section-heading{margin-bottom:68px;max-width:780px}.section-heading h2,.privacy-inner h2,.faq-section h2,.closing h2{font-size:clamp(30px,3.6vw,48px);font-weight:550;line-height:1.15;letter-spacing:-.045em}.section-heading h2{margin:16px 0}.section-heading>p:last-child{font-size:15px;color:var(--muted)}.workflow-step{display:grid;grid-template-columns:minmax(0,.78fr) minmax(0,1.7fr);align-items:center;gap:clamp(35px,5vw,76px);padding:60px 0;border-top:1px solid var(--line)}.workflow-step:last-child{padding-bottom:0}.step-copy h3{font-size:clamp(25px,2.5vw,34px);font-weight:550;line-height:1.22;letter-spacing:-.035em;margin:17px 0}.step-copy>p:not(.eyebrow){color:var(--muted);font-size:14px;line-height:1.75}.step-copy .detail-note{margin-top:20px;font-size:12px!important}.privacy-section{background:var(--soft)}.privacy-inner{display:grid;grid-template-columns:1fr 1fr;gap:90px;padding-block:80px}.privacy-inner h2{max-width:470px;margin-top:18px}.privacy-inner>div:last-child{align-self:center}.privacy-inner>div:last-child p{max-width:480px;color:var(--muted);font-size:15px;margin-bottom:24px}.faq-section{display:grid;grid-template-columns:.85fr 1.15fr;gap:70px;padding-block:100px}.faq-list{border-top:1px solid var(--line)}details{border-bottom:1px solid var(--line)}summary{display:flex;align-items:center;justify-content:space-between;gap:18px;list-style:none;cursor:pointer;font-size:15px;font-weight:550;line-height:1.5;min-height:76px;padding:20px 0}summary::-webkit-details-marker{display:none}.disclosure{font-size:22px;font-weight:350;transition:transform .2s}details[open] .disclosure{transform:rotate(45deg)}details p{padding:0 30px 26px 0;font-size:14px;color:var(--muted);line-height:1.8}.closing{text-align:center;padding-top:40px;padding-bottom:100px}.closing h2{margin:18px auto;max-width:780px}.closing>p:not(.eyebrow){color:var(--muted);font-size:15px}.closing .button{margin-top:28px}footer.section{max-width:none;margin-inline:var(--gutter);padding:26px 0;display:flex;align-items:center;flex-wrap:wrap;gap:22px;border-top:1px solid var(--line);font-size:11px;color:var(--muted)}footer>a{text-decoration:none;color:var(--ink);font-weight:600}footer>div{display:flex;gap:26px;margin-left:auto}footer>div a{text-decoration:none}footer>div a:hover{text-decoration:underline}
:lang(zh-Hans) .eyebrow{letter-spacing:.06em}:lang(zh-Hans) .promise{line-height:1.5}:lang(zh-Hans) .intro{line-height:1.9}:lang(zh-Hans) .step-copy h3{line-height:1.4;letter-spacing:-.02em}:lang(zh-Hans) .section-heading h2,:lang(zh-Hans) .privacy-inner h2,:lang(zh-Hans) .closing h2{line-height:1.35;letter-spacing:-.03em}
@media(prefers-color-scheme:dark){:root{--paper:#181917;--soft:#232420;--ink:#eeeee8;--muted:#afafa5;--line:#3c3d36;--accent:#ff8276;--button:#b92a25;--button-hover:#d0352f}.hero-shot .screenshot{box-shadow:none}.screenshot{border-color:#54554e}.wordmark img{background:white}}
@media(min-width:801px) and (prefers-reduced-motion:no-preference){.hero-copy{animation:enter .2s cubic-bezier(.2,.7,.2,1) both}.hero-shot{animation:enter .24s .04s cubic-bezier(.2,.7,.2,1) both}@keyframes enter{from{opacity:.5;transform:translateY(16px)}to{opacity:1;transform:translateY(0)}}}
@media(max-width:1050px){.hero-inner{grid-template-columns:minmax(300px,.9fr) minmax(0,1.1fr);gap:32px}.hero h1{font-size:76px}.actions{gap:18px}.workflow-step{grid-template-columns:1fr 1.5fr;gap:35px}.privacy-inner{gap:50px}}
@media(max-width:800px){html{scroll-padding-top:28px}.site-header{min-height:68px;padding-block:12px;gap:12px}.site-header nav{gap:0}.nav-link{display:none}.wordmark{font-size:12px;gap:8px}.wordmark img{width:28px;height:28px}.hero{padding:38px 0 48px}.hero-inner{grid-template-columns:minmax(0,1fr);gap:28px;max-width:650px}.hero h1{font-size:clamp(62px,13.5vw,88px);margin:18px 0 21px}.hero h1 i{right:-20px;width:16px;height:16px}.promise{font-size:20px}.intro{font-size:14px;max-width:450px;margin-top:10px}.actions{margin-top:22px;gap:22px}.fine-print{font-size:10px;line-height:1.7;margin-top:12px}.hero-shot{padding:0}.button{min-height:46px;padding:11px 19px}.hero-shot figcaption{margin-top:10px}.workflow{padding-top:50px;padding-bottom:50px}.section-heading{margin-bottom:35px}.section-heading h2{margin:14px 0}.section-heading>p:last-child{font-size:14px}.workflow-step{grid-template-columns:1fr;gap:26px;padding:38px 0}.step-copy{max-width:520px}.step-copy h3{font-size:28px;margin:13px 0}.step-copy .detail-note{margin-top:12px}.screenshot{border-radius:7px}figcaption{font-size:10px}.privacy-inner{grid-template-columns:1fr;gap:22px;padding-block:48px}.privacy-inner>div:last-child p{font-size:14px;margin-bottom:18px}.privacy-inner h2{margin-top:14px;max-width:360px}.faq-section{grid-template-columns:1fr;gap:28px;padding-block:50px}.faq-section h2{font-size:30px}summary{min-height:70px;font-size:14px}details p{font-size:13px;padding-right:0}.closing{padding-top:24px;padding-bottom:60px}.closing h2{font-size:34px}.closing>p:not(.eyebrow){font-size:14px}.closing .button{margin-top:23px}footer.section{gap:14px 22px;padding-block:23px}footer>div{margin-left:0;flex-basis:100%;gap:22px}.eyebrow{font-size:10px}:lang(zh-Hans) .closing h2{font-size:31px}}
@media(max-width:360px){.wordmark span{max-width:108px;line-height:1.2}.hero h1{font-size:59px}.actions{gap:15px}.text-link{font-size:12px}.promise{font-size:18px}.closing h2{font-size:30px}}
@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}*,*::before,*::after{animation:none!important;transition:none!important}.screenshot:hover,.button:hover{transform:none}}

.screenshot-export{aspect-ratio:1160/580}.screenshot-export img{width:110.344828%;left:-5.172414%;top:-30.517242%}

.phrase{display:inline-block;max-width:100%;white-space:normal}

/* Public component roles; shared geometry lives in product-chrome.css. */
.ktb-footer{--ktb-ink:var(--ink);--ktb-muted:var(--muted);--ktb-line:var(--line);--ktb-width:var(--rail);--ktb-gutter:var(--gutter);--ktb-focus:var(--accent)}

/* Header follows the product reading rail; small screens use the full navigation. */
.site-header{--ktb-header-action:var(--button);--ktb-header-action-ink:#fff;--ktb-header-paper:var(--paper);--ktb-header-ink:var(--ink);--ktb-header-line:var(--line);--ktb-header-gutter:var(--gutter);--ktb-header-height:64px;position:sticky;top:0;z-index:30;min-height:72px;padding-block:12px;background:var(--paper)}
.site-header nav{gap:24px}.wordmark{font-size:15px;white-space:nowrap}.nav-link{font-size:14px}
@media(max-width:900px){.site-header{min-height:64px;padding-block:10px;gap:12px}.wordmark{font-size:14px}.wordmark span{max-width:none}.wordmark img{width:28px;height:28px}.site-header:not([data-menu-ready]){flex-wrap:wrap}.site-header:not([data-menu-ready]) nav{flex-wrap:wrap;gap:12px}.site-header:not([data-menu-ready]) .nav-link{display:inline-flex}}

.site-header .ktb-header-primary{background:var(--button);color:#fff}.site-header .ktb-header-primary:hover{background:var(--button-hover)}

/* Leave the section opening below the sticky product header. */
html{scroll-padding-top:96px}

/* Keep enlarged text inside the hero reading rail. */
.hero-copy,.hero-shot{min-width:0}