:root{color-scheme:light;--paper:#f5f4ef;--ink:#172a26;--soft:#5a6860;--line:#d6ddd5;--panel:#e8ede3;--lime:#cdeb88;--on-lime:#172a26;--field:#fff;--field-border:#b9c5b9;--focus:#476f27;--link-hover:#507d29;--button-hover:#2d443c;--brand:#79a24c;--shadow:#172a2614}*{box-sizing:border-box}html{scroll-behavior:smooth;scroll-padding-top:24px}body{margin:0;background:var(--paper);color:var(--ink);font-family:Arial,Helvetica,sans-serif;-webkit-font-smoothing:antialiased}.shell{max-width:1240px;padding:0 64px;margin:auto}a{color:inherit;text-decoration:none}button,input,textarea{font:inherit}button,a{touch-action:manipulation}button{cursor:pointer}a:focus-visible,button:focus-visible,summary:focus-visible{outline:3px solid var(--focus);outline-offset:5px}header{padding:32px 0;display:flex;align-items:center;justify-content:space-between;gap:25px;border-bottom:1px solid var(--line)}.brand{font-size:28px;font-weight:700;letter-spacing:-1.4px;white-space:nowrap}.brand>span:first-child{font-weight:400;color:var(--soft)}.brand-dot{display:inline-block;width:8px;height:8px;border-radius:50%;background:var(--brand);margin-left:7px}nav{display:flex;gap:32px;font-size:13px}nav a:hover{color:var(--link-hover)}.eyebrow{display:block;font-size:11px;letter-spacing:1.6px;text-transform:uppercase;color:var(--soft);margin-bottom:23px;line-height:1.6}.hero{display:grid;grid-template-columns:1.3fr 1fr;gap:60px;align-items:center;padding:92px 0 80px}h1{font-size:clamp(45px,5.2vw,74px);line-height:1.025;letter-spacing:-3.6px;font-weight:500;margin:0 0 30px}p{color:var(--soft);font-size:15px;line-height:1.75;margin:0 0 24px}.intro{max-width:520px}.button{display:inline-flex;align-items:center;justify-content:center;gap:24px;border:0;border-radius:4px;padding:17px 22px;background:var(--ink);color:var(--paper);font-size:13px;min-height:48px}.button:hover{background:var(--button-hover)}.button:disabled{opacity:.55;cursor:wait}.stages{background:var(--panel);padding:32px;border-radius:7px}.stage-buttons{display:flex;flex-direction:column;gap:10px}.stage-buttons button{display:flex;align-items:center;justify-content:space-between;gap:15px;text-align:left;padding:20px 18px;border:1px solid var(--line);background:var(--paper);color:var(--ink);border-radius:4px;font-size:14px;min-height:58px}.stage-buttons button[aria-pressed=true]{background:var(--lime);border-color:var(--lime);color:var(--on-lime)}.stage-detail{font-size:13px;min-height:78px;margin:24px 0 20px}.stage-decoration{font-family:monospace;font-size:12px;color:var(--soft);padding-top:15px;border-top:1px solid var(--line)}.strip{display:flex;justify-content:space-between;gap:24px;padding:23px 0;border-top:1px solid var(--line);border-bottom:1px solid var(--line);font-size:12px;color:var(--soft)}main>section:not(.hero){padding:64px 0;border-bottom:1px solid var(--line)}h2{font-size:clamp(30px,3.2vw,43px);font-weight:500;letter-spacing:-1.7px;line-height:1.15;margin:0 0 24px}h3{font-size:21px;font-weight:500;letter-spacing:-.5px;line-height:1.3;margin:0 0 15px}.section-heading{display:flex;justify-content:space-between;gap:45px;align-items:start}.section-heading>p{max-width:340px;font-size:14px}.cards{display:grid;grid-template-columns:repeat(3,1fr);gap:40px;margin:36px 0 0}.cards p,.ai p,.results p{font-size:14px;margin-bottom:0}.number{display:block;font-family:monospace;color:var(--soft);font-size:12px;margin-bottom:24px}.ai{display:grid;grid-template-columns:1fr 1fr;gap:65px;background:var(--panel);border-radius:6px;padding:36px;margin-top:48px}.ai .eyebrow{margin-bottom:15px}.results{display:grid;grid-template-columns:repeat(3,1fr);gap:40px;margin-top:28px}.metric{font-size:54px;letter-spacing:-2px;margin-bottom:14px}.note{font-size:11px;margin:24px 0 0}.steps{display:grid;grid-template-columns:repeat(4,1fr);gap:22px;margin-top:28px}.steps>div{border-top:1px solid var(--line);padding-top:20px;font-size:13px}.steps span{display:block;font-family:monospace;font-size:11px;color:var(--soft);margin-bottom:13px}.founder{display:grid;grid-template-columns:1fr 1.5fr;gap:45px}.founder p{font-size:14px;margin:0}.founder .eyebrow{margin-bottom:12px}#contact{max-width:100%}#contact form{max-width:760px}.form-row{display:grid;grid-template-columns:1fr 1fr;gap:22px}label{display:block;font-size:13px;line-height:1.6;margin-bottom:20px}input,textarea{display:block;width:100%;background:var(--field);border:1px solid var(--field-border);border-radius:4px;padding:14px;color:var(--ink);font-size:16px;margin-top:8px}textarea{resize:vertical}.honey{display:none}footer{display:flex;justify-content:space-between;gap:20px;padding:28px 0;font-size:11px;color:var(--soft)}[hidden]{display:none!important}html[lang=zh-Hans] h1{letter-spacing:-1px;line-height:1.2}html[lang=zh-Hans] h2{letter-spacing:0}@media(max-width:900px){.shell{padding:0 32px}.hero{gap:32px;padding:65px 0}.stages{padding:22px}h1{font-size:51px}.cards,.results{gap:25px}.ai{gap:32px}.strip{font-size:11px}}@media(max-width:650px){.shell{padding:0 22px}header{padding:23px 0;gap:12px}.brand{font-size:24px}nav{display:none}.hero{grid-template-columns:1fr;padding:48px 0;gap:38px}h1{font-size:clamp(41px,10vw,60px);letter-spacing:-2px}.eyebrow{font-size:10px}.strip{flex-direction:column;gap:12px}.section-heading{display:block}.section-heading>p{max-width:none}.cards,.results,.ai,.founder{grid-template-columns:1fr;gap:30px}.cards article{border-top:1px solid var(--line);padding-top:20px}.number{margin-bottom:12px}.ai{padding:25px;margin-top:32px}.results article{display:grid;grid-template-columns:85px 1fr;column-gap:16px}.metric{grid-row:span 2;font-size:39px}.results h3{font-size:18px;margin-bottom:8px}.results p{font-size:13px}.steps{grid-template-columns:1fr 1fr}.form-row{grid-template-columns:1fr;gap:0}main>section:not(.hero){padding:42px 0}footer{flex-direction:column;gap:12px}}@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}}

@media(prefers-color-scheme:dark){:root:not([data-theme="light"]){color-scheme:dark;--paper:#101916;--ink:#edf3eb;--soft:#b0beb4;--line:#33443a;--panel:#1c2a22;--lime:#cdeb88;--field:#18261f;--field-border:#64776b;--focus:#cdeb88;--link-hover:#cdeb88;--button-hover:#cdeb88;--brand:#cdeb88;--shadow:#00000066}}
input::placeholder,textarea::placeholder{color:var(--soft);opacity:1}

:root[data-theme="dark"]{color-scheme:dark;--paper:#101916;--ink:#edf3eb;--soft:#b0beb4;--line:#33443a;--panel:#1c2a22;--lime:#cdeb88;--field:#18261f;--field-border:#64776b;--focus:#cdeb88;--link-hover:#cdeb88;--button-hover:#cdeb88;--brand:#cdeb88;--shadow:#00000066}
:root[data-theme="light"]{color-scheme:light}
.header-controls{display:flex;align-items:center;gap:20px}.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}@media(max-width:650px){header{flex-wrap:wrap}.header-controls{margin-left:auto;gap:14px}}@media(max-width:400px){.header-controls{width:100%;justify-content:space-between}}



.dropdown{position:relative;font-size:12px;min-width:93px}
.dropdown summary{display:flex;align-items:center;justify-content:space-between;gap:16px;padding:10px 0;min-height:40px;list-style:none;cursor:pointer;color:var(--ink)}
.dropdown summary::-webkit-details-marker{display:none}
.dropdown-chevron{color:var(--soft)}
.dropdown-menu{position:absolute;right:0;top:100%;z-index:3;min-width:156px;padding:8px;background:var(--paper);border:1px solid var(--line);box-shadow:0 8px 25px var(--shadow)}
.dropdown-option{display:block;width:100%;padding:12px;text-align:left;font:inherit;color:var(--ink);background:transparent;border:0;border-radius:0;line-height:1.4;white-space:nowrap;cursor:pointer}
.dropdown-option:hover,.dropdown-option[aria-current="page"],.dropdown-option[aria-pressed="true"]{background:var(--panel)}
.dropdown-option:focus-visible{outline:2px solid var(--focus);outline-offset:-2px}

@media(max-width:400px){.header-controls>.dropdown:first-child .dropdown-menu{left:0;right:auto}}