:root{color-scheme:dark;--bg:#171719;--fg:#f4f6f8;--muted:#aeb6c3;--red:#d53132;--line:#3a3a3e;--page:1440px;--gutter:clamp(24px,5vw,80px)}
*{box-sizing:border-box}html{scroll-behavior:smooth;scroll-padding-top:100px}body{margin:0;background:var(--bg);color:var(--fg);font-family:"Microsoft YaHei","PingFang SC",system-ui,sans-serif;-webkit-font-smoothing:antialiased}button,a{-webkit-tap-highlight-color:transparent}a{color:inherit;text-decoration:none}button{font:inherit;color:inherit;cursor:pointer}button:disabled{cursor:default}button,a{touch-action:manipulation}button:focus-visible,a:focus-visible{outline:2px solid var(--red);outline-offset:7px}::selection{background:var(--red);color:white}[hidden]{display:none!important}.wrap{max-width:var(--page);padding-inline:var(--gutter);margin-inline:auto}.red{color:var(--red)}.kicker{color:var(--red);font-size:14px;font-weight:700;letter-spacing:.04em}.skip{position:fixed;left:20px;top:-100px;z-index:20;padding:12px;background:var(--red)}.skip:focus{top:20px}
.site-header{height:82px;position:sticky;top:0;z-index:10;display:flex;align-items:center;justify-content:space-between;padding-inline:var(--gutter);background:#171719f5;border-bottom:1px solid var(--line);backdrop-filter:blur(16px)}.wordmark{display:inline-flex;align-items:center;gap:14px;font-family:Arial,sans-serif;font-weight:900;letter-spacing:-.04em;font-size:26px;white-space:nowrap}.brand-text>span{font-size:19px;font-weight:500;letter-spacing:-.03em;margin-left:3px}.header-logo{display:block;width:52px;height:52px;flex:none;object-fit:contain}.site-header nav{display:flex;gap:clamp(20px,3vw,48px);font-size:14px;color:var(--muted)}.site-header nav a:hover,.site-header nav a[data-current]{color:var(--fg)}.site-header nav a[data-current]{text-decoration:underline;text-decoration-color:var(--red);text-underline-offset:9px}.menu-toggle{display:none;background:none;border:0}.read-progress{position:fixed;top:81px;left:0;right:0;height:2px;background:var(--red);transform:scaleX(0);transform-origin:left;z-index:11}.mobile-nav{position:fixed;top:82px;inset-inline:0;background:var(--bg);z-index:12;padding:18px var(--gutter) 30px;border-bottom:1px solid var(--line)}.mobile-nav a{display:flex;gap:20px;align-items:center;padding:16px 0;border-bottom:1px solid var(--line)}.mobile-nav a span:first-child{color:var(--red)}.mobile-nav a span:last-child{margin-left:auto}
.intro h1>span:first-child{font-size:.66em;letter-spacing:-.09em;font-weight:400}.app-word{letter-spacing:-.06em}.intro-bottom p{font-size:22px;line-height:1.7;margin:0;color:var(--muted)}.intro-bottom strong{font-size:30px;font-weight:600;color:var(--fg)}.text-link{background:none;border:0;border-bottom:1px solid var(--red);padding:0 0 9px;display:inline-flex;gap:22px;align-items:center;font-size:16px;font-weight:600;line-height:1.6}.text-link span{font-size:24px;line-height:1}.text-link:hover{color:var(--red)}.contents{padding-block:76px 114px}.contents-list{margin-top:34px;border-top:1px solid var(--line)}.contents-list a{display:grid;grid-template-columns:68px 1.3fr 1fr 30px;align-items:center;gap:20px;padding:29px 0;border-bottom:1px solid var(--line)}.ordinal{color:var(--red);font-size:18px}.contents-list strong{font-size:26px;font-weight:600}.contents-list a>span:nth-last-child(2){color:var(--muted);font-size:16px}.contents-list i{font-size:28px;font-style:normal}.contents-list a:hover strong{color:var(--red)}
.product{border-top:1px solid var(--line);scroll-margin-top:80px}.product-hero{padding-top:52px;padding-bottom:90px}.product-meta{display:flex;justify-content:space-between;gap:28px;align-items:center}.product-meta>span:last-child{font-size:14px;color:var(--muted)}.hero-content{display:grid;grid-template-columns:minmax(0,1fr) 32%;gap:4%;align-items:center;margin-top:84px}.hero-copy h2{font-size:clamp(58px,6.5vw,96px);font-weight:850;letter-spacing:-.055em;line-height:1.16;margin:0 0 39px}.hero-copy h2>span{display:block}.hero-introduction{color:var(--muted);font-size:23px;line-height:1.7;margin:0 0 29px}.product-art{width:100%;height:auto;max-height:480px;object-fit:contain}.product-art.together{width:62%;margin-left:19%;image-rendering:auto}.product-art.ledger{opacity:.9}.product-art.biga{max-height:450px}#board .hero-copy h2{font-size:clamp(54px,5.7vw,86px)}#biga .hero-copy h2{font-size:clamp(52px,5.75vw,86px)}
.explanation{display:grid;grid-template-columns:1fr 1fr;gap:10%;padding-block:45px 95px}.explanation .kicker{margin-top:0}.explanation div>p:last-child{font-size:22px;line-height:1.9;margin:24px 0 0;color:var(--muted)}.explanation div:last-child>p:last-child{color:var(--fg)}.feature-showcase{padding-bottom:105px}.showcase-heading{display:flex;justify-content:space-between;align-items:center;gap:30px;margin-bottom:34px}.showcase-heading h3{font-size:36px;letter-spacing:-.04em;margin:0}.feature-tabs{display:flex;gap:32px;border-bottom:1px solid var(--line);padding-bottom:0;overflow-x:auto;scrollbar-width:thin}.feature-tabs button{position:relative;flex:none;white-space:nowrap;background:none;border:0;font-size:17px;color:var(--muted);padding:15px 0 17px}.feature-tabs button[aria-selected="true"]{color:var(--fg)}.feature-tabs button[aria-selected="true"]:after{content:"";position:absolute;bottom:0;height:3px;background:var(--red);left:0;right:0}.feature-panel{display:grid;grid-template-columns:31% minmax(0,1fr);gap:6%;align-items:center;min-height:510px;padding-top:40px}.feature-number{font-size:14px;color:var(--red);font-family:Arial,sans-serif;font-weight:700;letter-spacing:.12em}.feature-description h4{font-size:35px;line-height:1.4;letter-spacing:-.04em;margin:24px 0}.feature-description>p:not(.feature-number){font-size:18px;line-height:1.9;color:var(--muted);margin:0 0 32px}.feature-panel figure{margin:0;min-width:0}.image-button{width:100%;height:450px;background:#111113;border:0;padding:20px;display:flex;align-items:center;justify-content:center;cursor:zoom-in}.image-button img{max-width:100%;max-height:100%;width:auto;height:auto;object-fit:contain}.feature-panel figcaption{color:var(--muted);font-size:12px;line-height:1.7;margin-top:15px}.more-features{font-size:19px;line-height:1.8;color:var(--fg);max-width:960px;margin:48px 0 35px}.chapter-end{border-top:1px solid var(--line);padding-top:25px;display:flex;align-items:flex-start;justify-content:space-between;gap:50px}.chapter-end p{margin:0;max-width:780px;font-size:14px;line-height:1.8;color:var(--muted)}.chapter-end .text-link{white-space:nowrap;flex-shrink:0}
.outro{padding-block:135px 145px}.outro h2{font-size:clamp(76px,10vw,148px);line-height:1.1;letter-spacing:-.07em;margin:45px 0}.outro>p:not(.kicker){font-size:24px;color:var(--muted);line-height:1.8;margin:0 0 35px}footer{padding-block:30px!important;border-top:1px solid var(--line);display:flex;justify-content:space-between;gap:25px;font-size:12px;color:var(--muted)}
dialog{color:var(--fg);background:#171719;border:1px solid var(--line);padding:20px;max-width:96vw;max-height:94svh}dialog::backdrop{background:#000d;backdrop-filter:blur(5px)}.dialog-open{overflow:hidden}.dialog-bar{display:flex;gap:28px;align-items:center;padding:0 0 16px;border-bottom:1px solid var(--line)}.dialog-bar p{margin:0;flex:1;font-size:14px}.dialog-bar button{border:0;background:none;white-space:nowrap;font-size:14px;padding:8px}.dialog-bar a{font-size:13px;color:var(--muted);white-space:nowrap}.dialog-bar button:hover,.dialog-bar a:hover{color:var(--red)}#lightbox img{display:block;max-width:90vw;max-height:78svh;object-fit:contain;margin:18px auto 0}#experience{width:96vw;height:94svh;overflow:hidden;display:none}#experience[open]{display:flex;flex-direction:column}.embed-note{font-size:12px;color:var(--muted);margin:12px 0}#experience iframe{border:0;width:100%;flex:1;min-height:0;background:var(--bg)}

@media(max-width:1000px){.site-header nav{gap:18px;font-size:13px}.hero-content{grid-template-columns:minmax(0,1fr) 30%;gap:4%}.hero-copy h2{font-size:66px}#board .hero-copy h2,#biga .hero-copy h2{font-size:55px}.explanation{gap:7%}.feature-panel{grid-template-columns:34% minmax(0,1fr);gap:5%}.image-button{height:390px}.feature-description h4{font-size:29px}.intro-bottom p{font-size:18px}.contents-list strong{font-size:23px}}
@media(max-width:760px){html{scroll-padding-top:90px}.site-header{height:72px}.wordmark{font-size:23px;gap:10px}.header-logo{width:44px;height:44px}.brand-text>span{font-size:17px}.site-header nav{display:none}.menu-toggle{display:flex;gap:18px;align-items:center;font-size:14px}.menu-toggle span{font-size:24px}.mobile-nav{top:72px}.read-progress{top:71px}.intro-top span:last-child{display:none}.intro-bottom p{font-size:17px}.intro-bottom p:nth-child(2){display:none}.intro-bottom strong{font-size:25px}.intro-bottom .text-link{justify-self:start}.contents{padding-block:35px 72px}.contents-list a{grid-template-columns:32px 1fr 22px;gap:12px;padding:24px 0}.contents-list strong{font-size:21px}.contents-list a>span:nth-last-child(2){grid-column:2;grid-row:2;font-size:13px}.contents-list i{grid-column:3;grid-row:1/3}.ordinal{font-size:14px;align-self:start;margin-top:5px}.product-hero{padding-top:30px;padding-bottom:52px}.product-meta{align-items:flex-start;flex-direction:column;gap:12px}.product-meta .kicker{font-size:13px}.product-meta>span:last-child{font-size:12px}.hero-content{grid-template-columns:1fr;margin-top:46px;gap:32px}.hero-copy h2,#board .hero-copy h2,#biga .hero-copy h2{font-size:clamp(40px,8vw,60px);letter-spacing:-.065em;line-height:1.25;margin-bottom:24px}.hero-introduction{font-size:19px;margin-bottom:24px}.product-art{width:65%;max-height:280px;justify-self:end}.product-art.together{width:28%;margin-left:0;margin-right:10%}.product-art.ledger{width:50%}.product-art.biga{width:60%}.explanation{grid-template-columns:1fr;gap:34px;padding-block:20px 64px}.explanation div>p:last-child{font-size:18px;line-height:1.9;margin-top:16px}.showcase-heading{align-items:flex-start;flex-direction:column;gap:16px;margin-bottom:24px}.showcase-heading h3{font-size:29px}.showcase-heading .text-link{font-size:14px}.feature-tabs{gap:26px}.feature-tabs button{font-size:15px}.feature-panel{grid-template-columns:1fr;gap:26px;min-height:0;padding-top:22px}.feature-description h4{font-size:29px;margin:17px 0}.feature-description>p:not(.feature-number){font-size:17px;margin-bottom:20px}.image-button{height:320px;padding:14px}.feature-panel figcaption{font-size:11px}.more-features{font-size:17px;margin-top:32px}.chapter-end{flex-direction:column;gap:22px}.chapter-end p{font-size:13px}.feature-showcase{padding-bottom:70px}.outro{padding-block:80px}.outro h2{font-size:clamp(58px,12vw,90px);margin:30px 0}.outro>p:not(.kicker){font-size:19px}footer{flex-direction:column;gap:12px}dialog{padding:12px}.dialog-bar{gap:12px}.dialog-bar p{font-size:12px}.dialog-bar a{font-size:11px}.dialog-bar button{font-size:12px}.embed-note{font-size:11px}#lightbox img{max-width:87vw}.text-link{font-size:15px}}
@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}*{animation:none!important;transition:none!important}}
@media(max-width:380px){.wordmark{font-size:20px;gap:8px}.brand-text>span{font-size:15px}.header-logo{width:40px;height:40px}.menu-toggle{gap:8px;padding:0}}




.header-logo{border-radius:28%}





/* Opening composition: one viewport, a connected title and personal statement. */
.intro{max-width:var(--page);margin:auto;min-height:calc(100svh - 82px);padding:clamp(32px,4svh,64px) var(--gutter) clamp(40px,7svh,96px);display:grid;grid-template-rows:auto 1fr auto;row-gap:clamp(32px,5svh,72px);position:relative;isolation:isolate}
.intro-top{display:flex;justify-content:space-between;gap:24px;font-size:13px;color:var(--muted);letter-spacing:.08em}
.intro-main{align-self:center;min-width:0}
.intro h1{font-family:Arial,sans-serif;font-size:clamp(96px,min(14.5vw,22svh),248px);line-height:.86;font-weight:900;letter-spacing:-.07em;margin:0 0 clamp(28px,4svh,52px)}

.intro-bottom{display:grid;grid-template-columns:1fr 1fr auto;gap:clamp(24px,4vw,64px);align-items:end;padding-top:24px;border-top:1px solid var(--line)}
.intro-bottom p{font-size:clamp(18px,1.55vw,22px);line-height:1.6}
.intro-bottom strong{display:inline-block;margin-top:4px;font-size:clamp(25px,2.1vw,30px);font-weight:600;line-height:1.5}
@media(max-width:760px){
 .intro{min-height:calc(100svh - 72px);padding-top:32px;padding-bottom:40px;row-gap:36px}
 .intro-top{font-size:11px}.intro-top span:last-child{display:none}
 .intro h1{font-size:clamp(60px,17.5vw,126px);margin-bottom:28px}
 
 .intro-bottom{grid-template-columns:1fr auto;gap:20px;align-items:end;padding-top:22px}
 .intro-bottom p{font-size:15px}.intro-bottom strong{font-size:clamp(20px,5.5vw,25px)}
 .intro-bottom p:nth-child(2){display:none}.intro-bottom .text-link{justify-self:end;font-size:13px;gap:10px;white-space:nowrap}
}
@media(max-width:380px){.intro-bottom{grid-template-columns:1fr;gap:18px}.intro-bottom .text-link{justify-self:start}}

/* Company purpose, subordinate to the main brand title. */
.origin-note{margin:0;max-width:780px;font-size:clamp(20px,1.65vw,26px);font-weight:600;line-height:1.7;letter-spacing:.02em;color:#dce0e6}
@media(max-width:760px){.origin-note{font-size:20px;line-height:1.7;letter-spacing:0}}