:root{--ink:#10231d;--muted:#5c6b65;--paper:#fbfcf8;--line:#d8dfd9;--accent:#16734a;--soft:#e7f4ed;--dark:#0d2d22;--max:1180px}*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;background:var(--paper);color:var(--ink);font-family:"PingFang SC","Microsoft YaHei","Noto Sans SC",system-ui,sans-serif;line-height:1.72}a{color:inherit}.shell{width:min(calc(100% - 40px),var(--max));margin:auto}.site-header{position:sticky;top:0;z-index:20;background:rgba(251,252,248,.94);border-bottom:1px solid var(--line);backdrop-filter:blur(12px)}.header-inner{height:78px;display:flex;align-items:center;gap:34px}.brand{display:flex;align-items:center;gap:14px;text-decoration:none;margin-right:auto}.brand img{width:116px;height:auto;display:block}.brand span{font-size:14px;font-weight:700;border-left:1px solid var(--line);padding-left:14px}.main-nav{display:flex;gap:24px;font-size:14px}.main-nav a{text-decoration:none;color:#3d4a45}.main-nav a:hover,.main-nav a:focus{color:var(--accent)}.header-link{padding:10px 15px;background:var(--ink);color:white;text-decoration:none;font-size:13px;font-weight:700}.hero{padding:82px 0 0;background:radial-gradient(circle at 82% 18%,var(--soft),transparent 33%)}.hero-grid{display:grid;grid-template-columns:minmax(0,1.35fr) minmax(300px,.65fr);gap:70px;align-items:center}.eyebrow{font-size:12px;letter-spacing:.14em;text-transform:uppercase;color:var(--accent);font-weight:800;margin:0 0 18px}.hero h1{font-size:clamp(42px,6.1vw,78px);line-height:1.06;letter-spacing:-.045em;margin:0;max-width:900px}.hero .lead{font-size:19px;color:#42524b;max-width:780px;margin:28px 0}.actions{display:flex;flex-wrap:wrap;gap:12px;margin-top:32px}.button{display:inline-flex;align-items:center;justify-content:center;min-height:48px;padding:0 22px;text-decoration:none;font-weight:750;border:1px solid var(--ink)}.button.primary{background:var(--ink);color:white}.button.secondary{background:transparent}.button:hover,.button:focus{transform:translateY(-1px);box-shadow:0 8px 20px rgba(16,35,29,.1)}.hero-signal{min-height:390px;background:var(--dark);color:white;padding:34px;display:flex;flex-direction:column;justify-content:space-between;position:relative;overflow:hidden}.hero-signal:before,.hero-signal:after{content:"";position:absolute;border:1px solid rgba(255,255,255,.2);border-radius:50%}.hero-signal:before{width:320px;height:320px;right:-120px;top:-100px}.hero-signal:after{width:220px;height:220px;right:-35px;top:-25px}.hero-label{font-size:13px;color:#b9d8c9;max-width:260px;position:relative;z-index:1}.signal-flow{display:grid;gap:13px;position:relative;z-index:1}.signal-flow span{display:flex;align-items:center;gap:12px;font-weight:700}.signal-flow span:before{content:"";width:9px;height:9px;background:var(--accent);border-radius:50%}.signal-flow small{color:#abc1b7}.stats{display:grid;grid-template-columns:repeat(3,1fr);margin-top:72px;border-top:1px solid var(--line);border-bottom:1px solid var(--line)}.stat{padding:25px 0}.stat+ .stat{border-left:1px solid var(--line);padding-left:30px}.stat strong{display:block;font-size:29px}.stat span{font-size:13px;color:var(--muted)}.alert{background:#fff4df;border:1px solid #e7b96c;border-left:5px solid #b76d16;padding:17px 20px;font-weight:800;margin-top:28px}.section{padding:92px 0;border-bottom:1px solid var(--line)}.section.soft{background:var(--soft)}.section-heading{display:grid;grid-template-columns:minmax(240px,.62fr) minmax(0,1.38fr);gap:70px;margin-bottom:42px}.section h2{font-size:clamp(32px,4vw,52px);line-height:1.14;letter-spacing:-.03em;margin:0}.section-intro{font-size:18px;color:#46554f;margin:0}.card-grid{display:grid;grid-template-columns:repeat(3,1fr);border-top:1px solid var(--line);border-left:1px solid var(--line)}.card{padding:28px;min-height:220px;border-right:1px solid var(--line);border-bottom:1px solid var(--line);background:rgba(255,255,255,.55)}.card-tag{color:var(--accent);font-size:11px;font-weight:800;letter-spacing:.08em;margin:0 0 26px}.card h3{font-size:21px;line-height:1.35;margin:0 0 12px}.card p{margin:0;color:var(--muted)}.software-list{border-top:2px solid var(--ink)}.software-row{display:grid;grid-template-columns:44px minmax(280px,1.3fr) minmax(260px,1fr);gap:26px;padding:25px 0;border-bottom:1px solid var(--line)}.software-row>span{font-weight:800;color:var(--accent)}.software-row h3{font-size:18px;margin:0 0 8px}.software-row p{margin:0;color:var(--muted)}.software-meta{font-size:13px}.timeline{border-top:1px solid var(--line)}.step{display:grid;grid-template-columns:70px minmax(220px,.65fr) minmax(0,1.35fr);gap:28px;padding:23px 0;border-bottom:1px solid var(--line)}.step-code{font-weight:900;color:var(--accent)}.step strong{font-size:18px}.step p{margin:0;color:var(--muted)}.quote{font-size:clamp(25px,3vw,39px);line-height:1.35;font-weight:760;padding:42px;border-left:5px solid var(--accent);background:white;margin:0}.demo-panel{display:grid;grid-template-columns:1fr auto;gap:34px;align-items:center;padding:34px;background:var(--dark);color:white}.demo-panel h3{font-size:28px;margin:0 0 10px}.demo-panel p{color:#c8dad2;margin:0}.demo-panel .button{border-color:white}.faq-list{border-top:1px solid var(--line)}details{border-bottom:1px solid var(--line);padding:20px 0}summary{font-size:18px;font-weight:750;cursor:pointer;padding-right:30px}details p{max-width:850px;color:var(--muted)}.site-footer{background:var(--dark);color:white;padding:60px 0 26px}.footer-grid{display:grid;grid-template-columns:1.4fr 1fr 1fr;gap:50px}.footer-logo{width:150px;height:auto}.footer-grid h3{margin-top:0}.footer-grid p,.footer-grid a{color:#c5d5ce;font-size:14px}.footer-grid a{display:block;margin:6px 0}.footer-bottom{border-top:1px solid rgba(255,255,255,.16);margin-top:35px;padding-top:18px;display:flex;justify-content:space-between;color:#9fb3aa;font-size:12px}.mobile-nav{display:none}@media(max-width:900px){.main-nav,.header-link{display:none}.mobile-nav{display:block}.mobile-nav summary{font-size:14px}.mobile-nav nav{position:absolute;left:0;right:0;top:78px;background:var(--paper);border-bottom:1px solid var(--line);padding:20px}.mobile-nav a{display:block;padding:12px 20px;text-decoration:none}.hero{padding-top:55px}.hero-grid,.section-heading,.footer-grid{grid-template-columns:1fr}.hero-signal{min-height:290px}.stats{grid-template-columns:1fr}.stat+.stat{border-left:0;border-top:1px solid var(--line);padding-left:0}.card-grid{grid-template-columns:1fr 1fr}.software-row{grid-template-columns:35px 1fr}.software-meta{grid-column:2}.step{grid-template-columns:50px 1fr}.step p{grid-column:2}.demo-panel{grid-template-columns:1fr}.section{padding:68px 0}}@media(max-width:580px){.shell{width:min(calc(100% - 28px),var(--max))}.brand span{display:none}.hero h1{font-size:40px}.hero .lead{font-size:17px}.card-grid{grid-template-columns:1fr}.software-row{grid-template-columns:30px 1fr}.section-heading{gap:20px}.footer-bottom{display:block}.actions .button{width:100%}}@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}.button{transition:none}}
@media(max-width:580px){.footer-bottom span{display:block;margin-top:8px}}