.landing-page{--landing-paper:var(--app-surface,#fbfcf8);--landing-frame:var(--app-frame,#f1f4ed);--landing-ink:#252b23;--landing-muted:#61685c;--landing-line:#dce2d5;--landing-accent:#345c38;--landing-soft:#e8efdf;--landing-outline:#9eae90;color:var(--landing-ink);background:var(--landing-paper);overflow:clip}.landing-page button,.landing-page a{-webkit-tap-highlight-color:transparent}.landing-page button{cursor:pointer}.landing-page :is(button,a):focus-visible{outline:2px solid var(--landing-accent);outline-offset:5px}.landing-page a{color:inherit;text-decoration:none}.landing-header{z-index:2;border-bottom:1px solid var(--landing-line);justify-content:space-between;align-items:center;gap:24px;height:82px;padding:0 clamp(20px,5vw,88px);display:flex;position:relative}.landing-brand{letter-spacing:-.06em;align-items:center;gap:12px;font-size:27px;font-weight:750;display:inline-flex}.landing-brand-mark{border:5px solid var(--landing-accent);border-radius:3px;width:19px;height:19px;transform:rotate(-12deg)}.landing-nav,.landing-account{align-items:center;gap:28px;display:flex}.landing-nav{color:var(--landing-muted);font-size:12px}.landing-nav a{padding:10px 0}.landing-nav a:hover{color:var(--landing-accent)}.landing-account{gap:14px;font-size:12px}.landing-login{color:var(--landing-ink);background:0 0;border:0;min-height:36px;padding:8px 0}.landing-signup{color:var(--landing-paper);background:var(--landing-ink);border:0;border-radius:999px;min-height:36px;padding:9px 18px;font-weight:550}.landing-signup:hover{background:var(--landing-accent)}.landing-hero{grid-template-columns:1.15fr 1fr;align-items:center;gap:clamp(26px,4vw,80px);max-width:1500px;min-height:min(900px,100svh - 82px);margin:0 auto;padding:clamp(55px,7vw,116px) clamp(24px,6vw,100px) 90px;display:grid;position:relative}.landing-kicker{letter-spacing:.075em;color:var(--landing-muted);margin:0 0 26px;font:500 11px/1.65 JetBrains Mono,monospace;display:block}.landing-kicker>span{color:var(--landing-accent);margin-right:8px}.landing-headline{letter-spacing:-.065em;margin:0;font-size:clamp(54px,6.5vw,104px);font-weight:580;line-height:1.03}.landing-headline>span{animation:.75s cubic-bezier(.16,1,.3,1) both landing-line-in;display:block}.landing-headline>span+span{animation-delay:.12s}@keyframes landing-line-in{0%{opacity:0;transform:translateY(20px)}to{opacity:1;transform:translateY(0)}}.landing-headline-accent{color:var(--landing-accent)}.landing-page[data-locale=zh] .landing-headline{letter-spacing:-.055em;font-size:clamp(42px,5vw,76px);line-height:1.14}.landing-intro{max-width:39ch;color:var(--landing-muted);text-wrap:pretty;margin:27px 0 31px;font-size:16px;line-height:1.7}.landing-task-label{margin:0 0 12px;font-size:12px;font-weight:650}.landing-task-grid{gap:8px;display:grid}.landing-task-grid-hero{grid-template-columns:1fr;max-width:400px}.landing-task{min-height:50px;color:var(--landing-ink);border:1px solid var(--landing-line);text-align:left;background:0 0;border-radius:4px;align-items:center;gap:12px;padding:13px 15px;transition:background-color .2s,border-color .2s;display:flex}.landing-task:hover{background:var(--landing-soft);border-color:var(--landing-outline)}.landing-task>svg:first-child{color:var(--landing-accent);flex:none}.landing-task>svg:last-child{flex:none;margin-left:auto}.landing-task strong{font-size:13px;font-weight:570;display:block}.landing-task small{color:var(--landing-muted);margin-top:6px;font-size:12px;line-height:1.55;display:block}.landing-setup-note{max-width:48ch;color:var(--landing-muted);margin:14px 0 0;font-size:11px;line-height:1.7}.landing-scroll{border-top:1px solid var(--landing-line);color:var(--landing-muted);justify-content:space-between;align-items:center;padding-top:16px;font-size:11px;display:flex;position:absolute;bottom:27px;left:clamp(24px,6vw,100px);right:clamp(24px,6vw,100px)}.landing-story{align-self:center;min-width:0;padding:0;position:relative}.landing-story-caption{color:var(--landing-muted);border-bottom:1px solid var(--landing-line);justify-content:space-between;align-items:center;padding:10px 0;font:10px/1.5 JetBrains Mono,monospace;display:flex}.landing-story-toggle{border:1px solid var(--landing-line);color:var(--landing-muted);background:0 0;border-radius:50%;place-items:center;width:32px;height:32px;display:grid}.landing-story-diagram{height:clamp(270px,26vw,350px);margin-top:22px;position:relative}.landing-story-wires{width:100%;height:100%;position:absolute;inset:0;overflow:visible}.story-wire{fill:none;stroke:var(--landing-line);stroke-width:1.3px;vector-effect:non-scaling-stroke}.story-wire-on{stroke:var(--landing-outline)}.story-wire-next{opacity:0}.story-wire-next.story-wire-on{opacity:1}.story-wire-flow{fill:none;stroke:var(--landing-accent);stroke-width:2px;stroke-dasharray:10 125;stroke-dashoffset:135px;vector-effect:non-scaling-stroke;animation:2s linear infinite story-flow}@keyframes story-flow{to{stroke-dashoffset:0}}.story-node{border:1px solid var(--landing-line);background:var(--landing-paper);border-radius:4px;align-items:center;gap:8px;width:40%;min-height:48px;padding:10px;font-size:12px;font-weight:550;transition:border-color .4s,background-color .4s,opacity .4s,transform .65s cubic-bezier(.16,1,.3,1);display:flex;position:absolute}.story-node>svg{color:var(--landing-muted);flex:none}.story-node>span:not(:last-child){flex:1}.story-node-controller{top:3%;left:30%}.story-node-code{top:34%;left:6%}.story-node-test{top:34%;right:6%}.story-node-follow{top:69%;left:30%}.story-node-current{border-color:var(--landing-accent);background:var(--landing-soft)}.story-node-done{border-color:var(--landing-outline)}.story-node-future{opacity:0;transform:translateY(12px)}.story-node-added{opacity:1;transform:translateY(0)}.story-added-label{color:var(--landing-muted);opacity:0;font-size:10px;transition:opacity .4s;position:absolute;top:60%;right:8%}.story-added-visible{opacity:1}.story-result{color:var(--landing-accent);opacity:0;justify-content:center;align-items:center;gap:7px;font-size:11px;transition:opacity .4s;display:flex;position:absolute;top:97%;left:0;right:0}.story-result-visible{opacity:1}.landing-story-copy{gap:16px;min-height:102px;margin-top:34px;display:flex}.landing-story-number{letter-spacing:-.06em;color:var(--landing-outline);font:400 35px/1 JetBrains Mono,monospace}.landing-story-copy h2{letter-spacing:-.02em;margin:0 0 7px;font-size:18px;font-weight:570}.landing-story-copy p{color:var(--landing-muted);max-width:45ch;margin:0;font-size:12.5px;line-height:1.65}.landing-story-phases{border-top:1px solid var(--landing-line);grid-template-columns:repeat(4,1fr);margin-top:14px;display:grid}.landing-story-phases button{color:var(--landing-muted);background:0 0;border:0;border-top:2px solid #0000;justify-content:center;align-items:center;gap:5px;padding:12px 2px;font-size:11px;display:flex}.landing-story-phases button>span{font:10px JetBrains Mono,monospace}.landing-story-phases button>svg{margin-left:auto}.landing-story-phases button[aria-pressed=true]{color:var(--landing-accent);border-top-color:var(--landing-accent);font-weight:650}.landing-product-section,.landing-proofs,.landing-start,.landing-footer{max-width:1200px;margin:0 auto;padding-left:clamp(22px,5vw,60px);padding-right:clamp(22px,5vw,60px)}.landing-product-section{padding-top:85px}.landing-product-heading{max-width:730px}.landing-product-heading h2,.landing-start h2{letter-spacing:-.045em;text-wrap:balance;margin:0;font-size:clamp(30px,4vw,56px);font-weight:570;line-height:1.12}.landing-product-heading p,.landing-start-body{max-width:58ch;color:var(--landing-muted);margin:22px 0 0;font-size:15px;line-height:1.75}.landing-product-theatre{margin-top:42px;padding-top:clamp(80px,15vw,190px);position:relative}.landing-product-theatre .landing-wordmark{z-index:0;color:var(--landing-line);transform:translateX(-50%) translateY(calc(var(--lp-p) * -85px));font-size:clamp(120px,28vw,330px);position:absolute;top:0;left:50%}.landing-product-capture{z-index:1;border:1px solid var(--landing-line);background:var(--landing-frame);transform:translateY(calc(var(--lp-p) * -12px));border-radius:8px;position:relative;overflow:hidden}.landing-product-capture img,.landing-proof-capture img{width:100%;height:auto;display:block}.landing-capture-caption{color:var(--landing-muted);margin:16px 0 0;font-size:11px;line-height:1.7}.landing-claims{grid-template-columns:repeat(4,minmax(0,1fr));gap:25px;margin:60px 0 0;display:grid}.landing-claims article{border-top:1px solid var(--landing-line);padding-top:22px}.landing-claims svg{color:var(--landing-accent)}.landing-claims h3{margin:15px 0 10px;font-size:15px;font-weight:600;line-height:1.45}.landing-claims p{color:var(--landing-muted);margin:0;font-size:12px;line-height:1.8}.landing-proofs{padding-top:110px;scroll-margin-top:25px}.landing-section-rule{color:var(--landing-muted);letter-spacing:.05em;align-items:center;gap:20px;margin-bottom:32px;font:11px JetBrains Mono,monospace;display:flex}.landing-section-rule i{background:var(--landing-line);flex:1;height:1px}.landing-proof{border-bottom:1px solid var(--landing-line);grid-template-columns:1fr 1.15fr;align-items:center;gap:55px;padding:55px 0;scroll-margin-top:24px;display:grid}.landing-proof-index{color:var(--landing-muted);font:11px JetBrains Mono,monospace}.landing-proof h3{letter-spacing:-.035em;margin:16px 0 14px;font-size:clamp(20px,2.4vw,30px);font-weight:570;line-height:1.24}.landing-proof p{color:var(--landing-muted);margin:0;font-size:13px;line-height:1.8}.landing-proof-capture{border:1px solid var(--landing-line);border-radius:6px;overflow:hidden}.landing-also{color:var(--landing-muted);padding:27px 0;font-size:12px;line-height:1.8}.landing-start{padding-top:100px;padding-bottom:100px;scroll-margin-top:35px}.landing-start h2{max-width:21ch}.landing-start-steps{gap:24px;margin:32px 0;padding:0;font-size:12px;list-style:none;display:flex}.landing-start-steps li{align-items:center;gap:8px;display:flex}.landing-start-steps li>span{color:var(--landing-muted);font:10px JetBrains Mono,monospace}.landing-task-grid-start{grid-template-columns:repeat(3,1fr);gap:14px}.landing-task-grid-start .landing-task{align-items:flex-start;padding:22px 18px}.landing-task-grid-start .landing-task>svg{margin-top:2px}.landing-task-grid-start .landing-task strong{font-size:14px}.landing-skip{color:var(--landing-muted);background:0 0;border:none;align-items:center;gap:8px;margin-top:27px;padding:6px 0;font-size:12px;display:inline-flex}.landing-skip:hover{color:var(--landing-accent)}.landing-terms{color:var(--landing-muted);max-width:73ch;margin:20px 0 0;font-size:11px;line-height:1.8}.landing-footer{border-top:1px solid var(--landing-line);justify-content:space-between;align-items:center;gap:20px;padding-top:28px;padding-bottom:32px;display:flex}.landing-footer-brand{letter-spacing:-.04em;flex-wrap:wrap;align-items:baseline;gap:14px;font-size:23px;font-weight:650;display:flex}.landing-footer-brand>span{color:var(--landing-muted);letter-spacing:0;font:11px JetBrains Mono,monospace}.landing-footer a{align-items:center;gap:7px;font-size:12px;display:inline-flex}@media (prefers-color-scheme:dark){.landing-page{--landing-paper:#191b18;--landing-frame:#22251f;--landing-ink:#edf0e6;--landing-muted:#b1b9a7;--landing-line:#343d2f;--landing-accent:#c5dd9f;--landing-soft:#293222;--landing-outline:#6f855b}}@media (width<=1050px){.landing-hero{gap:32px;padding-left:30px;padding-right:30px}.landing-headline{font-size:clamp(47px,6.5vw,74px)}.landing-story-phases button>svg{display:none}.landing-claims{grid-template-columns:repeat(2,minmax(0,1fr));gap:30px}}@media (width<=760px){.landing-header{gap:12px;height:70px;padding:0 22px}.landing-nav{display:none}.landing-hero{grid-template-columns:1fr;gap:40px;padding:50px 24px 76px}.landing-headline{font-size:clamp(46px,9.5vw,76px)}.landing-page[data-locale=zh] .landing-headline{font-size:clamp(41px,8.2vw,66px)}.landing-intro{max-width:44ch}.landing-story{justify-self:center;width:100%;max-width:540px}.landing-story-diagram{height:300px}.landing-story-copy{min-height:82px}.landing-scroll{bottom:18px}.landing-product-section{padding-top:60px}.landing-proof{grid-template-columns:1fr;gap:24px;padding:35px 0}.landing-task-grid-start{grid-template-columns:1fr}.landing-start{padding-top:65px;padding-bottom:65px}.landing-start-steps{flex-wrap:wrap;gap:16px}}@media (width<=410px){.landing-header{padding:0 16px}.landing-brand{gap:8px;font-size:24px}.landing-brand-mark{border-width:4px;width:15px;height:15px}.landing-account{gap:10px;font-size:11px}.landing-signup{padding:8px 13px}.landing-account .lang-toggle{padding:5px 0}.landing-account .lang-toggle svg{display:none}.landing-hero{padding-left:20px;padding-right:20px}.story-node{gap:5px;padding:9px 7px;font-size:11px}.story-node>svg{width:15px}.landing-start-steps{gap:13px;font-size:11px}.landing-footer-brand>span{max-width:190px}}@media (prefers-reduced-motion:reduce){.landing-page *,.landing-page :before,.landing-page :after{transition:none!important;animation:none!important}.landing-page .lp-reveal{opacity:1;transform:none}.landing-product-theatre .landing-wordmark{transform:translate(-50%)}.landing-page .lp-stage{transform:none}}