/* DS-156: neutral UI; all colour belongs to the independent clay illustrations. */
*{box-sizing:border-box}
html{scroll-padding-top:108px}
body{margin:0;background:var(--paper);color:var(--body);font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","Noto Sans TC","Noto Sans SC","Noto Sans JP","Noto Sans KR",Roboto,Arial,sans-serif;line-height:1.7;-webkit-font-smoothing:antialiased}
h1,h2,h3,p,figure,ul{margin:0}
a{color:inherit;text-decoration:none}
button,select{font:inherit;color:inherit}
button,a,select,summary{-webkit-tap-highlight-color:transparent}
a:focus-visible,button:focus-visible,select:focus-visible,summary:focus-visible{outline:3px solid var(--ink);outline-offset:5px;border-radius:6px}
img,svg{display:block;max-width:100%}
img{height:auto}
.sr-only{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap;border:0}
.skip-link{position:fixed;z-index:20;left:24px;top:12px;padding:12px 20px;background:var(--card);border:1px solid var(--ink);transform:translateY(-180%)}
.skip-link:focus{transform:none}
.section-shell{width:min(1200px,calc(100% - 96px));margin-inline:auto}
.site-header{position:sticky;top:0;z-index:10;background:var(--paper);border-bottom:1px solid var(--line)}
.nav-shell{max-width:1320px;padding:8px 48px;margin:auto;display:grid;grid-template-columns:minmax(0,1fr) auto minmax(0,1fr);align-items:center;gap:24px;min-height:88px}
.brand{display:flex;align-items:center;gap:12px;flex-shrink:0;width:120px}
.brand img{width:120px;flex-shrink:0}
.brand-name{display:none;font-size:18px;font-weight:700;line-height:1.4;white-space:nowrap;color:var(--ink)}
html:lang(zh) .brand{width:max-content;max-width:100%}
html:lang(zh) .brand-name{display:block}
.brand-dark{display:none}
:root[data-theme="night"] .brand-light{display:none}
:root[data-theme="night"] .brand-dark{display:block}
.desktop-nav{display:flex;justify-self:center;gap:28px}
.nav-link{display:flex;align-items:center;min-height:48px;font-size:14px;font-weight:600}
.nav-link:hover,.footer-link:hover{color:var(--muted)}
.nav-tools{display:flex;align-items:center;justify-self:end;gap:8px}
.lang-select{width:116px;min-height:48px;background:transparent;border:0;padding:0 8px;font-size:13px;cursor:pointer}
.lang-select option{background:var(--card)}
.language-picker{position:relative;flex-shrink:0}
.language-trigger{display:flex;align-items:center;gap:8px;min-height:48px;padding:0 12px;border:0;border-radius:12px;background:transparent;color:var(--ink);font-size:14px;font-weight:500;cursor:pointer}
.language-trigger:hover,.language-trigger[aria-expanded="true"]{background:var(--paper-2)}
.language-trigger:active{opacity:.75}
.language-trigger svg,.language-option svg{fill:none;stroke:currentColor;stroke-width:1.6;stroke-linecap:round;stroke-linejoin:round;flex-shrink:0}
.language-globe{width:20px;height:20px}
.language-chevron{width:14px;height:14px}
.language-current{white-space:nowrap}
.language-panel{position:fixed;inset:auto;margin:0;width:224px;max-width:calc(100vw - 32px);overflow:auto;overscroll-behavior:contain;padding:8px;background:var(--card);color:var(--ink);border:1px solid var(--line);border-radius:16px;box-shadow:0 12px 40px #0002;z-index:100}
.language-option{display:flex;align-items:center;justify-content:space-between;gap:16px;width:100%;min-height:48px;border:0;border-radius:10px;background:transparent;color:inherit;padding:10px 12px;font:inherit;font-size:14px;text-align:left;cursor:pointer}
.language-option:hover,.language-option[aria-checked="true"]{background:var(--paper-2)}
.language-option:focus-visible{outline-offset:-3px}
.language-option svg{width:18px;height:18px;visibility:hidden}
.language-option[aria-checked="true"] svg{visibility:visible}
@media(max-width:760px){.language-trigger{width:48px;height:48px;justify-content:center;padding:13px}.language-globe{width:22px;height:22px}.language-current,.language-chevron{display:none}}
.icon-button{border:0;background:transparent;border-radius:12px;width:48px;height:48px;padding:13px;cursor:pointer;display:grid;place-items:center;flex-shrink:0}
.icon-button:hover{background:var(--paper-2)}
.icon-button svg{width:22px;height:22px;fill:none;stroke:currentColor;stroke-width:1.6;stroke-linecap:round;stroke-linejoin:round}
.ic-sun{display:none}
:root[data-theme="night"] .ic-sun{display:block}
:root[data-theme="night"] .ic-moon{display:none}
.btn{display:inline-flex;align-items:center;justify-content:center;text-align:center;gap:8px;min-height:48px;border:1px solid transparent;border-radius:12px;padding:12px 24px;font-size:15px;font-weight:600;line-height:1.5;cursor:pointer}
.btn-primary{background:var(--burnt);color:var(--on-burnt)}
.btn-primary:hover{background:var(--burnt-d)}
.btn-ghost{border-color:var(--line);background:transparent}
.btn-ghost:hover{background:var(--paper-2)}
.btn:active{opacity:.8}
.nav-cta{white-space:nowrap;padding-inline:18px}
.mobile-menu{display:none;position:relative}
.mobile-menu summary{list-style:none}
.mobile-menu summary::-webkit-details-marker{display:none}
.menu-panel{position:absolute;right:0;top:calc(100% + 16px);width:min(320px,calc(100vw - 48px));padding:20px;background:var(--card);border:1px solid var(--line);border-radius:16px;box-shadow:0 12px 40px #0002;display:grid;gap:8px}
.menu-panel .nav-link{padding:8px}
.hero-scene{position:relative;isolation:isolate;overflow:clip;padding-bottom:112px}
.hero{z-index:1;display:grid;grid-template-columns:minmax(0,.95fr) minmax(0,1.05fr);grid-template-areas:"intro art" "actions art";align-content:center;column-gap:16px;min-height:620px;padding-top:40px;padding-bottom:32px;position:relative}
.hero-intro{grid-area:intro;align-self:end;position:relative;z-index:1}
.hero-actions{grid-area:actions;align-self:start;position:relative;z-index:1;margin-top:32px;max-width:500px}
.eyebrow{font-size:13px;letter-spacing:.08em;font-weight:600;color:var(--muted);margin-bottom:22px}
h1{font-size:clamp(42px,4.7vw,64px);font-weight:750;line-height:1.18;letter-spacing:-.045em;max-width:570px;text-wrap:balance;overflow-wrap:break-word}
.phrase{display:inline-block;width:max-content;max-width:100%;white-space:normal;word-break:keep-all;overflow-wrap:anywhere}
.lead{font-size:18px;line-height:1.9;color:var(--muted)}
.hero .lead{margin-top:26px;max-width:465px}
.actions{display:flex;flex-wrap:wrap;gap:12px}
.download-actions{display:flex;flex-wrap:wrap;align-items:flex-start;gap:12px;margin-top:20px;max-width:440px}
.download-button{display:grid;place-items:center;flex-shrink:0;width:168px;height:50px;background:#000;border:1px solid #aaa;border-radius:8px;color:#fff;cursor:not-allowed;padding:1px;filter:grayscale(1);opacity:.4}
/* Generated marks/text have no inner border; this button owns the only frame. */
.download-button img{height:46px;width:auto;max-width:164px;object-fit:contain}
@media(max-width:760px){.download-actions{justify-content:center}}
.beta-note{margin-top:18px;font-size:12px;line-height:1.8;color:var(--muted);max-width:405px}
.illustration{position:relative;isolation:isolate;pointer-events:none;min-width:0}
.hero-art{grid-area:art;align-self:center;margin-inline:-24px;max-width:670px}
.hero-art .globe{position:relative;z-index:1;width:100%}
.art-mist{position:absolute;z-index:2;bottom:8%;left:-6%;width:112%;opacity:.65}
.hero-horizon{position:absolute;z-index:0;bottom:0;left:0;width:100%;pointer-events:none}
.hero-horizon img{width:100%;min-width:760px;max-width:1440px;position:relative;left:50%;transform:translateX(-50%);opacity:.22;mask-image:linear-gradient(to bottom,transparent,#000 28%,#000 68%,transparent)}
:root[data-theme="night"] .hero-horizon img{opacity:.12}
/* DS-156 R16/R17: real screens, short tab introductions, overlapping the Hero horizon. */
.app-screenshots{position:relative;z-index:1;margin-top:-144px;padding-bottom:96px}
.screenshot-grid{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:24px}
.app-screen{min-width:0;display:grid;grid-template-rows:subgrid;grid-row:span 2}
.app-screen figcaption{text-align:center;color:var(--ink)}
.screen-title{display:block;font-size:18px;font-weight:700}
.screen-description{margin:8px auto 0;max-width:30ch;font-size:14px;font-weight:500;line-height:1.7;color:var(--ink)}
.app-screen img{width:100%;border:1px solid var(--line);border-radius:16px;background:var(--paper-2)}
@media(max-width:760px){.app-screenshots{margin-top:-64px;padding-bottom:48px}.screenshot-grid{grid-template-columns:repeat(2,minmax(0,1fr));gap:16px}.screen-title{font-size:16px}.app-screen img{border-radius:12px}}
.story{display:grid;grid-template-columns:minmax(0,1fr) minmax(0,1fr);gap:32px 72px;align-items:center;padding-block:50px;margin-bottom:70px}
.story-copy{max-width:500px}
h2{font-size:clamp(30px,3.2vw,44px);line-height:1.3;letter-spacing:-.035em;font-weight:700;text-wrap:balance;overflow-wrap:break-word}
.story .lead{margin-top:24px}
.story-art{width:100%;max-width:600px;justify-self:center}
.story-art img{width:100%}
.story-1 .story-copy,.story-3 .story-copy{grid-column:2;grid-row:1}
.story-1 .story-art,.story-3 .story-art{grid-column:1;grid-row:1}
.story-labels{list-style:none;padding:0;display:flex;gap:12px 24px;flex-wrap:wrap;margin-top:24px;color:var(--ink);font-size:13px;font-weight:600}
.story-labels li{display:flex;align-items:center;gap:8px}
.story-labels li::before{content:"";width:4px;height:4px;border-radius:50%;background:var(--ink);flex-shrink:0}
.small-note{font-size:13px;color:var(--muted);margin-top:24px}
.purpose{position:relative;isolation:isolate;padding:90px 0 190px;margin-bottom:70px;overflow:hidden}
.purpose-copy{max-width:800px;text-align:center;position:relative;z-index:1}
.purpose h2{font-size:clamp(32px,3.6vw,48px)}
.purpose .lead{margin:28px auto 0;max-width:650px}
.purpose-horizon{position:absolute;z-index:-1;left:0;bottom:0;width:100%;pointer-events:none}
.purpose-horizon img{width:100%;opacity:.32;mask-image:linear-gradient(to bottom,transparent,#000 38%,#000 68%,transparent)}
:root[data-theme="night"] .purpose-horizon img{opacity:.16}
.past{padding-top:0}
.journey-options{grid-column:1/-1;display:grid;grid-template-columns:1fr 1fr;gap:64px;border-top:1px solid var(--line);padding-top:36px}
h3{font-size:20px;line-height:1.5;letter-spacing:-.015em}
.journey-options p{font-size:15px;color:var(--muted);margin-top:14px;max-width:460px}
.trust{border-block:1px solid var(--line);padding-block:40px;display:flex;gap:28px;align-items:flex-start;max-width:1000px;margin-bottom:130px}
.trust-icon{width:32px;flex-shrink:0;fill:none;stroke:currentColor;stroke-width:1.4;margin-top:4px}
.trust h2{font-size:28px}
.trust p{max-width:780px;color:var(--muted);margin-block:16px}
.text-link{display:inline-flex;align-items:center;min-height:48px;font-size:14px;font-weight:600;text-decoration:underline;text-underline-offset:5px}
.faq{display:grid;grid-template-columns:minmax(0,.8fr) minmax(0,1.2fr);gap:80px;margin-bottom:100px}
.faq-list{border-top:1px solid var(--line)}
.faq details{border-bottom:1px solid var(--line)}
.faq summary{list-style:none;position:relative;cursor:pointer;font-size:16px;font-weight:600;padding:22px 38px 22px 0;min-height:64px;line-height:1.7}
.faq summary::-webkit-details-marker{display:none}
.faq summary::after{content:"+";position:absolute;right:4px;top:20px;font-size:23px;font-weight:400;line-height:1.2}
.faq details[open] summary::after{content:"−"}
.faq-answer{padding:0 32px 24px 0;color:var(--muted);font-size:15px}
.final{text-align:center;padding-block:10px 100px;max-width:850px}
.final-globe{width:220px;margin:0 auto 24px}
.final .lead{margin:24px auto 28px;max-width:620px}
.site-footer{border-top:1px solid var(--line);padding-block:48px 24px}
.footer-top{display:flex;justify-content:space-between;gap:48px}
.footer-top .brand{width:max-content;margin-bottom:12px}
.footer-top .brand img{width:140px}
.footer-top p{color:var(--muted);font-size:14px;max-width:320px}
.footer-links{display:grid;grid-template-columns:1fr 1fr;gap:0 32px;max-width:520px}
.footer-links h2{grid-column:1/-1;font-size:13px;color:var(--muted);letter-spacing:.05em;margin-bottom:8px}
.footer-link{min-height:48px;display:flex;align-items:center;font-size:13px}
.footer-bottom{display:flex;justify-content:space-between;gap:24px;border-top:1px solid var(--line);margin-top:40px;padding-top:24px;font-size:11px;color:var(--muted)}
.footer-utilities{display:flex;align-items:center;gap:20px}
.footer-theme{width:auto;padding:0 12px;display:flex;gap:8px;font-size:12px;white-space:nowrap}
.footer-theme svg{flex-shrink:0;width:18px;height:18px}
@media(min-width:1500px){.hero{min-height:620px}}
@media(max-width:1280px){.nav-shell{padding-inline:32px;gap:16px}.desktop-nav{gap:16px}.desktop-nav .nav-link{font-size:12px}.nav-cta{font-size:13px;padding-inline:12px}}
@media(max-width:1040px){.nav-shell{display:flex}.desktop-nav,.nav-cta{display:none}.nav-tools{margin-left:auto}.mobile-menu{display:block}.lang-select{width:106px}}
@media(max-width:1100px){.nav-shell{padding-inline:32px;gap:16px}.desktop-nav{gap:16px}.desktop-nav .nav-link{font-size:12px}.section-shell{width:calc(100% - 64px)}.story{gap:32px 40px}.faq{gap:40px}.hero{min-height:550px}.hero-art{margin-inline:-16px}}
@media(max-width:960px){.desktop-nav,.nav-cta{display:none}.nav-tools{margin-left:auto}.mobile-menu{display:block}.lang-select{width:106px}.hero{padding-block:32px;min-height:540px}.lead{font-size:16px}.story{margin-bottom:36px}}
@media(max-width:760px){
 html{scroll-padding-top:88px}.section-shell{width:calc(100% - 48px)}.nav-shell{padding:6px 20px;min-height:76px;gap:8px}.brand{width:96px;gap:8px}.brand img{width:96px}.brand-name{font-size:16px}.nav-tools{gap:0}.lang-select{width:98px;font-size:12px}.hero{grid-template-columns:1fr;grid-template-areas:"intro" "art" "actions";padding-top:52px;padding-bottom:52px;min-height:0;text-align:center;gap:0}
 .eyebrow{font-size:12px;margin-bottom:18px}h1{font-size:clamp(36px,7.8vw,54px);max-width:560px;margin-inline:auto}.hero .lead{margin:22px auto 0;max-width:510px}.hero-art{margin:20px -8px 10px;max-width:560px;justify-self:center;width:calc(100% + 16px)}.hero-actions{margin:0;max-width:100%;justify-self:center}.actions{justify-content:center}.download-actions{margin:20px auto 0}.footer-utilities{justify-content:space-between;width:100%;gap:12px}.beta-note{margin:18px auto 0;max-width:380px}.hero-scene{padding-bottom:48px}
 .story{grid-template-columns:1fr;gap:12px;padding-block:32px;margin-bottom:44px}.story-copy{max-width:550px;margin-inline:auto;width:100%}.story-1 .story-copy,.story-3 .story-copy{grid-column:1;grid-row:auto}.story-1 .story-art,.story-3 .story-art{grid-column:1;grid-row:auto}.story-art{max-width:520px;margin-top:12px}.story h2{max-width:520px}.story .lead{margin-top:20px}.story-labels{margin-top:20px}.purpose{padding:56px 0 120px;margin-bottom:44px}.purpose-copy{max-width:620px}.purpose .lead{margin-top:24px}.purpose-horizon{width:180%;left:-40%}.past{padding-top:0}.journey-options{grid-template-columns:1fr;gap:28px;padding-top:28px;margin-top:8px}.journey-options p{max-width:100%}.trust{gap:18px;padding-block:32px;margin-bottom:80px}.trust h2{font-size:25px}.trust p{font-size:14px}.faq{grid-template-columns:1fr;gap:28px;margin-bottom:64px}.faq summary{font-size:15px}.final{padding-bottom:72px}.final-globe{width:180px}.footer-top{flex-direction:column;gap:32px}.footer-links{max-width:100%;gap:0 20px}.footer-bottom{flex-direction:column;gap:8px}
}
@media(max-width:380px){.nav-shell{padding-inline:12px}.brand{width:84px}.brand img{width:84px}.brand-name{font-size:15px}.lang-select{width:88px}.hero{padding-top:38px}.actions{flex-direction:column;width:100%}.hero-actions{width:100%}.actions .btn{width:100%}.hero-art{margin-block:16px}.trust{gap:12px}.trust-icon{width:24px}}
@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}}

[hidden]{display:none!important}
.waitlist-dialog{width:min(480px,calc(100vw - 32px));max-height:calc(100dvh - 32px);overflow:auto;border:1px solid var(--line);border-radius:16px;padding:40px 32px 32px;background:var(--card);color:var(--ink);box-shadow:0 24px 80px #0003}
.waitlist-dialog::backdrop{background:#0009}
.waitlist-dialog h2{font-size:28px;padding-right:24px}
.dialog-close{position:absolute;right:8px;top:8px;font-size:28px;font-weight:400}
.waitlist-intro{font-size:14px;color:var(--muted);margin:16px 0 24px;line-height:1.8}
#waitlistForm>label{display:block;font-size:13px;font-weight:600;margin-bottom:8px}
#waitlistEmail{display:block;box-sizing:border-box;width:100%;min-height:48px;padding:12px 14px;border:1px solid var(--line-2);border-radius:12px;color:var(--ink);background:var(--paper);font:inherit;font-size:16px}
#waitlistEmail:focus-visible{outline:2px solid var(--ink);outline-offset:2px}
#waitlistForm .waitlist-consent{display:flex;align-items:flex-start;gap:10px;margin:20px 0 8px;font-size:12px;font-weight:400;line-height:1.8}
.waitlist-consent input{width:18px;height:18px;flex-shrink:0;margin-top:3px;accent-color:var(--ink)}
.waitlist-privacy{display:inline-block;font-size:12px;text-decoration:underline;text-underline-offset:3px;min-height:32px;color:var(--muted)}
.waitlist-honeypot{position:absolute;left:-10000px;width:1px;height:1px;overflow:hidden}
.waitlist-submit,.waitlist-success .btn,.waitlist-leave .btn{width:100%;margin-top:12px}
.waitlist-dialog .btn:disabled{opacity:.6;cursor:wait}
.waitlist-status,.waitlist-leave-status{font-size:13px;line-height:1.7;min-height:0;margin-top:8px}
.waitlist-result{font-size:18px;font-weight:600;margin-top:24px}
.beta-testing-links{padding:20px;border:1px solid var(--line);border-radius:16px;background:var(--paper-2)}
.beta-testing-links h3{margin:0 0 8px;font-size:16px;font-weight:600;line-height:1.5}
.beta-testing-links .btn{min-height:48px;white-space:normal;text-align:center}
.beta-platform-pending{margin:16px 0 8px;font-size:13px;line-height:1.8;color:var(--muted)}
@media(max-width:380px){.waitlist-dialog{padding-inline:24px}}

/* Optional website analytics: compact, nonmodal, equal choices. */
.product-definition {max-width:52ch;color:var(--muted);font-size:.95rem;line-height:1.65;margin:1rem 0;}
.analytics-notice {position:fixed;bottom:16px;left:16px;right:16px;z-index:80;max-width:900px;margin:0 auto;padding:20px 24px;display:flex;gap:24px;align-items:center;background:var(--card);color:var(--body);border:1px solid var(--line,#ddd);border-radius:20px;box-shadow:0 12px 40px #0002;}
.analytics-notice[hidden] {display:none;}
.analytics-notice p {font-size:.875rem;line-height:1.5;margin:6px 0;}
.analytics-notice a {font-size:.875rem;}
.analytics-actions {display:flex;gap:8px;flex-shrink:0;}
.analytics-actions .btn {min-height:44px;padding:10px 16px;border:1px solid currentColor;background:transparent;color:inherit;}
#analyticsSettings {border:0;background:none;font:inherit;cursor:pointer;}
@media (max-width:640px) {.analytics-notice {flex-direction:column;align-items:stretch;gap:12px;padding:16px;} .analytics-actions .btn {flex:1;}}