:root{--ink:#263a50;--muted:#66716d;--paper:#f5f3ec;--line:#e3e3d9;--green:#263a50;--green2:#344b64;--accent:#e8a76c;--white:#fff;scroll-behavior:smooth}
*{box-sizing:border-box}html{scroll-padding-top:88px}body{margin:0;background:var(--paper);color:var(--ink);font-family:'DM Sans','Noto Sans SC','Microsoft YaHei',sans-serif;-webkit-font-smoothing:antialiased}a{color:inherit;text-decoration:none}button{font:inherit}button,a,summary{ -webkit-tap-highlight-color:transparent}a:focus-visible,button:focus-visible,summary:focus-visible{outline:3px solid #8cae45;outline-offset:4px}.shell{width:min(1200px,calc(100% - 64px));margin-inline:auto}.skip-link{position:absolute;top:-100px;left:12px;z-index:200;background:#fff;padding:12px}.skip-link:focus{top:10px}
.site-header{height:82px;position:sticky;top:0;z-index:100;background:#f5f3ecee;backdrop-filter:blur(16px);border-bottom:1px solid #e8e8df}.header-inner{height:100%;display:flex;align-items:center;gap:28px}.brand{display:flex;align-items:center;gap:11px;white-space:nowrap}.brand-symbol{width:34px;height:34px;background:var(--green);border-radius:11px;display:flex;align-items:center;justify-content:center;gap:3px;transform:rotate(-7deg)}.brand-symbol span{height:16px;width:4px;background:var(--accent);border-radius:3px}.brand-symbol span:nth-child(2){height:21px}.brand-symbol span:nth-child(3){height:12px}.brand-word{font-size:23px;font-weight:700;letter-spacing:-1.3px}.brand-dot{color:#96ae45}.brand-old{border-left:1px solid #cbd0c5;padding-left:10px;font-size:11px;color:#79847c;margin-left:2px}.nav{display:flex;gap:27px;margin-left:auto;align-items:center}.nav a{font-size:13px;color:#45534e;transition:color .2s}.nav a:hover{color:#86a12d}.menu-toggle{display:none}.header-action{padding:11px 18px;border:1px solid #b9c5b5;border-radius:6px;font-size:12px;font-weight:700;margin-left:12px;white-space:nowrap}.header-action span{margin-left:14px}
.hero{min-height:665px;display:grid;grid-template-columns:1.02fr .98fr;align-items:center;gap:30px;padding-top:52px;padding-bottom:75px}.hero-copy{position:relative;z-index:2;padding-bottom:15px}.eyebrow,.kicker{font-size:12px;font-weight:700;letter-spacing:.12em;color:#657c4d}.eyebrow{display:flex;align-items:center;gap:12px}.eyebrow-line{display:block;width:27px;height:1px;background:#8cac63}.hero h1{font-size:clamp(45px,5.3vw,78px);line-height:1.18;letter-spacing:-.075em;margin:28px 0 24px;font-weight:700}.hero h1 em{font-style:normal;color:#416252}.hero-description{max-width:510px;font-size:16px;line-height:1.95;color:#5d6b64;margin:0 0 31px}.hero-actions{display:flex;gap:12px;flex-wrap:wrap}.button{min-height:50px;padding:14px 21px;border-radius:5px;display:inline-flex;align-items:center;justify-content:space-between;gap:26px;font-size:13px;font-weight:700;border:1px solid transparent;cursor:pointer;transition:transform .2s,background .2s,box-shadow .2s}.button:hover{transform:translateY(-2px);box-shadow:0 10px 22px #1727241c}.button-dark{background:var(--green);color:white}.button-dark:hover{background:#275247}.button-light{background:#fff;color:var(--green);border-color:#dfe3d8}.button-accent{background:var(--accent);color:var(--ink);width:100%}.hero-notes{display:flex;gap:18px;margin-top:25px;color:#79847d;font-size:11px}.hero-notes span:before{content:'•';margin-right:8px;color:#a1b463}
.hero-art{height:548px;position:relative;isolation:isolate}.art-grid{position:absolute;inset:5px 0 20px 20px;background-image:linear-gradient(#cfd6c844 1px,transparent 1px),linear-gradient(90deg,#cfd6c844 1px,transparent 1px);background-size:26px 26px;border-radius:50%;mask-image:radial-gradient(circle,#000 40%,transparent 76%)}.paper-back{position:absolute;width:70%;height:78%;right:5%;top:11%;background:#cedbb9;border:1px solid #b6c5a2;transform:rotate(8deg);border-radius:8px;box-shadow:0 22px 50px #1a352420}.paper-front{position:absolute;width:78%;height:83%;top:5%;left:9%;background:#fff;border:1px solid #e3e7dc;border-radius:8px;box-shadow:0 27px 65px #213c2a26;padding:31px 32px;transform:rotate(-3deg)}.paper-top{display:flex;justify-content:space-between;color:#9ca99c;font-size:9px;font-weight:700;letter-spacing:.15em}.paper-title{font-size:27px;font-weight:700;letter-spacing:-.04em;margin-top:32px}.paper-rule{height:1px;background:#dde5db;margin:18px 0 7px}.paper-row{display:flex;align-items:center;gap:13px;padding:15px 4px;border-bottom:1px solid #e7ece3}.paper-row.inset{padding-left:24px}.paper-row div{flex:1}.paper-row strong,.paper-row small{display:block}.paper-row strong{font-size:14px}.paper-row small{font-size:10px;color:#9aa89c;margin-top:3px}.row-num{color:#6e8f70;font-size:12px;font-weight:700;min-width:23px}.row-marker{font-size:9px;color:#86a78a;border:1px solid #bfd6bd;border-radius:3px;padding:3px 5px}.paper-body{padding:24px 4px}.paper-body span{display:block;height:5px;background:#eef1eb;border-radius:4px;margin-bottom:10px}.paper-body span:nth-child(2){width:88%}.paper-body span:nth-child(3){width:63%}.paper-bottom{position:absolute;bottom:23px;left:32px;right:32px;display:flex;justify-content:space-between;color:#a4b1a6;font-size:9px;letter-spacing:.1em}.float-card{position:absolute;right:-5px;bottom:58px;padding:16px 19px;display:flex;gap:12px;align-items:center;background:#fff;border:1px solid #e2e9df;border-radius:8px;box-shadow:0 18px 36px #183a3426;transform:rotate(4deg);font-size:11px;line-height:1.6;color:#69776c}.float-card strong{font-size:13px;color:#203c31}.float-icon{font-size:22px;color:#4b8058}
.trust-strip{border-top:1px solid #e2e5db;border-bottom:1px solid #e2e5db;background:#f0f1e9}.trust-inner{min-height:78px;display:flex;align-items:center;justify-content:space-between;gap:20px}.trust-inner span{font-size:12px;color:#768279}.trust-inner b{font-size:12px;letter-spacing:.07em;color:#3a5948;font-weight:600}
.section{padding-top:116px;padding-bottom:116px}.section-head{display:flex;justify-content:space-between;align-items:end;gap:45px;margin-bottom:46px}.kicker{margin:0 0 18px}.section h2,.contact-section h2{font-size:clamp(35px,4vw,56px);line-height:1.28;letter-spacing:-.06em;margin:0;font-weight:700}.section-head>p{max-width:350px;color:var(--muted);line-height:1.9;font-size:14px;margin:0 0 5px}.feature-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:15px}.feature-card{min-height:337px;padding:26px 29px;border:1px solid #e0e4d9;background:#fff;border-radius:8px;position:relative;transition:transform .2s,box-shadow .2s}.feature-card:hover{transform:translateY(-5px);box-shadow:0 18px 35px #23403512}.feature-number{font-size:12px;color:#90a095;font-weight:700}.feature-icon{width:63px;height:63px;margin:24px 0 24px;background:#edf4e9;border-radius:13px;position:relative;padding:13px}.icon-outline i{display:block;height:5px;border-left:5px solid #679370;border-bottom:1px solid #9bbca0;margin:5px 0;width:100%}.icon-outline i:nth-child(2){width:75%;margin-left:12%}.icon-outline i:nth-child(3){width:55%;margin-left:25%}.icon-blocks{display:flex;flex-wrap:wrap;gap:4px}.icon-blocks i{display:block;background:#77a181;border-radius:2px;height:13px;width:34px}.icon-blocks i:nth-child(2){width:22px;background:#afd0a8}.icon-blocks i:nth-child(3){width:34px}.icon-export i:first-child{display:block;width:23px;height:25px;border:2px solid #6b9875;margin:auto}.icon-export i:last-child{display:block;width:24px;height:12px;border-bottom:3px solid #6b9875;border-left:3px solid #6b9875;border-right:3px solid #6b9875;margin:2px auto}.feature-card h3{font-size:20px;letter-spacing:-.04em;margin:0 0 12px}.feature-card p{font-size:13px;color:#66746a;line-height:1.9;margin:0}.feature-meta{position:absolute;left:29px;bottom:25px;color:#7e947b;font-size:11px}
.workflow{background:#e9eee4}.workflow-inner{display:grid;grid-template-columns:.85fr 1.15fr;gap:100px}.workflow-intro>p:not(.kicker){max-width:355px;color:#647268;font-size:14px;line-height:1.95;margin:24px 0 28px}.text-link{font-size:13px;font-weight:700;color:#2d5d45;border-bottom:1px solid #88ac7d;padding-bottom:5px}.text-link span{margin-left:14px}.steps{border-top:1px solid #c7d2c3}.steps details{border-bottom:1px solid #c7d2c3;padding:0}.steps summary{list-style:none;cursor:pointer;display:flex;gap:22px;align-items:center;min-height:74px}.steps summary::-webkit-details-marker{display:none}.steps summary>span:first-child{font-size:12px;color:#6f9074;font-weight:700}.steps strong{font-size:17px;letter-spacing:-.03em;font-weight:600;flex:1}.step-plus{font-size:22px;color:#73967c;transition:transform .2s}.steps details[open] .step-plus{transform:rotate(45deg)}.steps details p{margin:-3px 35px 23px;color:#5d6e61;font-size:13px;line-height:1.9}
.demo-section{padding-bottom:124px}.demo-window{border-radius:10px;background:#fff;border:1px solid #d9e0d7;overflow:hidden;box-shadow:0 25px 60px #23403518}.demo-toolbar{height:48px;background:#f5f7f2;border-bottom:1px solid #e1e5de;display:flex;align-items:center;gap:20px;padding:0 17px;color:#869188;font-size:11px}.window-dots{display:flex;gap:5px}.window-dots i{width:8px;height:8px;border-radius:50%;background:#c6d3c5}.window-dots i:first-child{background:#e5b4a8}.window-dots i:nth-child(2){background:#e7d6a4}.demo-toolbar>a{margin-left:auto;color:#3c6b4c;font-weight:700}.demo-stage{height:565px;position:relative;background:radial-gradient(circle at 72% 30%,#e3eddf 0,transparent 40%),#f8faf5}.demo-stage iframe{width:100%;height:100%;border:0;display:block}.demo-prompt{height:100%;display:flex;flex-direction:column;align-items:center;justify-content:center;text-align:center;padding:30px}.demo-prompt-mark{font-size:35px;letter-spacing:-.1em;font-weight:700;background:#23483b;color:#d9e88a;width:76px;height:76px;display:grid;place-items:center;border-radius:19px;box-shadow:0 15px 30px #214a2d25}.demo-prompt h3{font-size:31px;line-height:1.4;letter-spacing:-.05em;margin:24px 0 10px}.demo-prompt p{max-width:400px;font-size:13px;color:#748077;line-height:1.9;margin:0 0 22px}.demo-footnote{font-size:12px;color:#839088;margin:16px 0 0}
.download-section{background:#183a34;color:#fff;padding-top:105px;padding-bottom:105px;position:relative;overflow:hidden}.download-section:before{content:'';position:absolute;right:-120px;top:-220px;width:600px;height:600px;border:1px solid #acc38d3a;border-radius:50%;box-shadow:0 0 0 90px #acc38d0a,0 0 0 180px #acc38d0a}.download-inner{display:grid;grid-template-columns:1fr 400px;gap:90px;position:relative;align-items:center}.light-kicker{color:#b7cf93}.download-inner>div:first-child>p:not(.kicker){max-width:495px;color:#b7ccc2;line-height:1.95;font-size:14px;margin:24px 0 30px}.download-meta{display:flex;gap:9px;flex-wrap:wrap}.download-meta span{border:1px solid #5e8273;border-radius:4px;color:#cee0ce;padding:8px 11px;font-size:11px}.download-card{background:#f8faf3;color:var(--ink);border-radius:8px;padding:30px 30px 25px;box-shadow:0 25px 50px #071b1a4d}.download-card-top{display:flex;justify-content:space-between;align-items:center;color:#8d9f8f;font-size:10px;letter-spacing:.1em}.download-card-icon{display:grid;place-items:center;width:51px;height:51px;border-radius:11px;background:#e7eddb;color:#43684a;font-size:25px}.download-card h3{font-size:21px;margin:27px 0 10px}.download-card p{font-size:12px;line-height:1.9;color:#758077;margin:0 0 21px}.download-card small{display:block;color:#89958a;font-size:10px;line-height:1.7;margin-top:13px}
.faq-section{padding-bottom:128px}.faq-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:25px;border-top:1px solid #d6ded2;padding-top:32px}.faq-grid>div{padding-right:20px}.faq-grid h3{font-size:16px;margin:0 0 12px}.faq-grid p{font-size:13px;color:#68756b;line-height:1.9;margin:0}.contact-section{background:#e6ecdc;padding:100px 0}.contact-inner{display:grid;grid-template-columns:1fr 365px;gap:70px;align-items:center}.contact-inner>div:first-child>p:not(.kicker){color:#68776d;line-height:1.9;font-size:14px;max-width:410px}.contact-card{background:#fff;padding:29px 30px;border-radius:8px;border:1px solid #d4dfce;box-shadow:0 20px 45px #294d3010}.contact-card-label{font-size:10px;letter-spacing:.11em;color:#8fa38c}.contact-card h3{font-size:19px;margin:25px 0 10px}.contact-card p{font-size:13px;color:#738178;line-height:1.8;margin:0 0 28px}
.site-footer{background:#142b27;color:#fff;padding:52px 0 25px}.footer-inner{display:grid;grid-template-columns:1fr 1fr;gap:50px}.footer-brand>span{font-size:25px;font-weight:700;letter-spacing:-1.3px}.footer-brand small{display:block;color:#9eb6a9;margin-top:8px;font-size:11px}.footer-links{display:flex;justify-content:end;align-items:start;gap:20px;flex-wrap:wrap}.footer-links a{font-size:11px;color:#c7d5cb}.footer-links a:hover{color:var(--accent)}.footer-bottom{grid-column:1/-1;display:flex;justify-content:space-between;border-top:1px solid #365349;padding-top:21px;color:#89a195;font-size:10px}
@media(max-width:1100px){.nav{gap:15px}.brand-old{display:none}.hero{grid-template-columns:1fr .9fr}.paper-front{left:3%;width:88%}.float-card{right:-8px}.workflow-inner{gap:55px}.download-inner{gap:40px}}
@media(max-width:800px){.shell{width:min(100% - 38px,620px)}.site-header{height:70px}.header-inner{gap:10px}.brand-word{font-size:21px}.nav{display:none;position:absolute;right:18px;top:64px;width:min(260px,calc(100vw - 36px));background:#fff;border:1px solid #dfe5da;border-radius:9px;padding:12px;box-shadow:0 16px 38px #183a3425;flex-direction:column;align-items:stretch;gap:0}.nav.is-open{display:flex}.nav a{display:block;padding:11px 12px}.menu-toggle{display:flex;margin-left:auto;width:38px;height:38px;border:0;background:transparent;flex-direction:column;align-items:center;justify-content:center;gap:4px;cursor:pointer}.menu-toggle span{width:17px;height:2px;background:#314a3d;border-radius:2px}.header-action{margin-left:0}.hero{display:flex;flex-direction:column;align-items:stretch;gap:10px;padding-top:75px;padding-bottom:70px;min-height:0}.hero h1{font-size:clamp(45px,10vw,66px)}.hero-art{height:450px;width:100%;max-width:540px;margin:auto}.paper-front{width:77%;left:10%}.section{padding-top:77px;padding-bottom:77px}.section-head{display:block;margin-bottom:32px}.section-head>p{margin-top:20px}.feature-grid{grid-template-columns:1fr;gap:12px}.feature-card{min-height:260px}.feature-icon{margin:15px 0}.workflow-inner,.download-inner,.contact-inner{grid-template-columns:1fr;gap:34px}.workflow-intro>p:not(.kicker){max-width:550px}.demo-stage{height:500px}.download-card{max-width:500px}.faq-grid{grid-template-columns:1fr;gap:26px}.faq-grid>div{padding-bottom:22px;border-bottom:1px solid #d6ded2}.trust-inner{flex-wrap:wrap;justify-content:flex-start;padding:18px 0}.trust-inner span{width:100%}.trust-inner b{font-size:10px}.contact-section{padding:75px 0}}
@media(max-width:520px){.shell{width:calc(100% - 32px)}.brand-symbol{width:30px;height:30px}.brand-word{font-size:20px}.header-action{padding:9px 12px}.header-action span{margin-left:6px}.hero{padding-top:55px}.hero h1{font-size:45px}.hero-description{font-size:14px}.hero-actions .button{width:100%}.hero-notes{flex-direction:column;gap:7px}.hero-art{height:340px}.paper-front{padding:19px 20px;height:88%;width:82%;left:6%}.paper-back{height:83%;right:3%}.paper-title{font-size:19px;margin-top:20px}.paper-row{padding:8px 2px;gap:6px}.paper-row.inset{padding-left:9px}.paper-row strong{font-size:11px}.paper-row small{font-size:8px}.row-num{font-size:9px;min-width:18px}.row-marker{font-size:8px}.paper-body{padding:14px 2px}.paper-bottom{left:20px;right:20px;bottom:15px;font-size:7px}.float-card{bottom:8px;padding:9px;right:1px;font-size:9px}.float-card strong{font-size:10px}.float-icon{font-size:16px}.section h2,.contact-section h2{font-size:35px}.steps summary{gap:13px}.steps strong{font-size:14px}.demo-stage{height:430px}.demo-toolbar{gap:8px}.demo-toolbar>span{overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.demo-toolbar>a{white-space:nowrap}.download-section{padding-top:75px;padding-bottom:75px}.download-card{padding:22px}.footer-inner{grid-template-columns:1fr;gap:25px}.footer-links{justify-content:start}.footer-bottom{display:block}.footer-bottom span{display:block;margin-bottom:7px}}
@media(prefers-reduced-motion:reduce){*,*:before,*:after{scroll-behavior:auto!important;transition:none!important}}
/* Zhangyuan identity */
.brand-symbol{background:url('./assets/zhangyuan-final.png') center/contain no-repeat;border-radius:9px;transform:none;flex:none}
.brand-symbol span{display:none}
.brand-word{font-size:23px;letter-spacing:.01em}
.brand-dot{display:none}
.demo-prompt-mark{background:url('./assets/zhangyuan-final.png') center/contain no-repeat;color:transparent;box-shadow:0 15px 30px #263a5025}
.eyebrow,.kicker{color:#966744}
.eyebrow-line{background:#e8a76c}
.hero h1 em{color:#344b64}
.workflow{background:#e9edf0}
.text-link,.demo-toolbar>a{color:#344b64;border-color:#e8a76c}
@media(max-width:520px){.brand-word{font-size:20px}}
.paper-back{background:#cbd4dd;border-color:#b8c4d0}
.feature-icon{background:#f4e8d8}
.download-section{background:#263a50}
.contact-section{background:#e8edf0}
.site-footer{background:#1d2f42}