:root{
  --bg:#fafaf7; --panel:#ffffff; --ink:#1a231e; --mut:#5b6660; --line:#e3e7e2;
  --green:#178a50; --green-d:#0f6b3c; --green-bg:#e8f4ec; --amber:#b45309;
  --code:#0f1a14; --radius:14px;
}
*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
body{font-family:"Segoe UI","PingFang SC","Microsoft YaHei",system-ui,sans-serif;background:var(--bg);color:var(--ink);line-height:1.7}
a{color:var(--green);text-decoration:none}
a:hover{text-decoration:underline}
.wrap{max-width:1060px;margin:0 auto;padding:0 22px}

/* nav */
nav{position:sticky;top:0;z-index:50;background:rgba(250,250,247,.88);backdrop-filter:blur(10px);border-bottom:1px solid var(--line)}
nav .wrap{display:flex;align-items:center;gap:26px;height:58px}
.brand{font-weight:700;font-size:18px;color:var(--ink);display:flex;align-items:center;gap:9px}
.logo{width:26px;height:26px;border-radius:7px;background:linear-gradient(135deg,#22b365,#0f6b3c);display:inline-flex;align-items:center;justify-content:center;color:#fff;font-size:14px;font-weight:800}
nav .links{margin-left:auto;display:flex;gap:22px;font-size:14.5px}
nav .links a{color:var(--mut)}
nav .links a:hover{color:var(--ink);text-decoration:none}
.nav-cta{background:var(--green);color:#fff!important;padding:7px 16px;border-radius:8px;font-weight:600}
.nav-cta:hover{background:var(--green-d);text-decoration:none!important}

/* hero */
.hero{padding:84px 0 66px;text-align:center;background:
  radial-gradient(700px 340px at 50% -60px,#dcefe2 0%,transparent 70%)}
.hero .tag{display:inline-block;background:var(--green-bg);color:var(--green-d);border:1px solid #c4e3ce;font-size:13px;padding:4px 14px;border-radius:99px;margin-bottom:22px}
.hero h1{font-size:44px;line-height:1.25;letter-spacing:-.5px}
.hero h1 em{font-style:normal;color:var(--green)}
.hero p.sub{max-width:640px;margin:18px auto 0;color:var(--mut);font-size:17.5px}
.hero .btns{margin-top:34px;display:flex;gap:14px;justify-content:center;flex-wrap:wrap}
.btn{display:inline-flex;align-items:center;gap:9px;padding:13px 30px;border-radius:11px;font-size:16px;font-weight:600}
.btn.primary{background:var(--green);color:#fff;box-shadow:0 6px 18px rgba(23,138,80,.28)}
.btn.primary:hover{background:var(--green-d);text-decoration:none}
.btn.ghost{border:1.5px solid var(--line);background:var(--panel);color:var(--ink)}
.btn.ghost:hover{border-color:var(--green);text-decoration:none}
.hero .meta{margin-top:16px;color:#8a958e;font-size:13px}

/* sections */
section{padding:64px 0}
.sec-head{text-align:center;margin-bottom:44px}
.sec-head h2{font-size:30px}
.sec-head p{color:var(--mut);margin-top:8px}
.alt{background:var(--panel);border-top:1px solid var(--line);border-bottom:1px solid var(--line)}

/* features */
.feat{display:grid;grid-template-columns:repeat(3,1fr);gap:18px}
.feat .card{background:var(--panel);border:1px solid var(--line);border-radius:var(--radius);padding:24px 22px;transition:transform .15s,box-shadow .15s}
.feat .card:hover{transform:translateY(-3px);box-shadow:0 10px 26px rgba(20,40,30,.08)}
.feat .ic{font-size:24px}
.feat h3{font-size:16.5px;margin:10px 0 6px}
.feat p{font-size:14px;color:var(--mut)}

/* shots */
.shots{display:grid;grid-template-columns:1fr 1fr;gap:18px}
.shots figure{border:1px solid var(--line);border-radius:var(--radius);overflow:hidden;background:var(--panel)}
.shots figure.wide{grid-column:1/-1}
.shots img{display:block;width:100%;height:auto}
.shots figcaption{padding:11px 16px;font-size:13.5px;color:var(--mut);border-top:1px solid var(--line)}

/* steps */
.steps{display:grid;grid-template-columns:repeat(3,1fr);gap:18px;counter-reset:s}
.step{background:var(--panel);border:1px solid var(--line);border-radius:var(--radius);padding:24px 22px;position:relative}
.step::before{counter-increment:s;content:counter(s);position:absolute;top:-14px;left:20px;width:30px;height:30px;border-radius:9px;background:var(--green);color:#fff;font-weight:700;display:flex;align-items:center;justify-content:center;font-size:15px}
.step h3{font-size:16px;margin:8px 0 6px}
.step p{font-size:14px;color:var(--mut)}
.step code{background:#f0f3ef;border:1px solid var(--line);border-radius:5px;padding:1px 7px;font-size:13px;font-family:Consolas,monospace}

/* license */
.lic{display:grid;grid-template-columns:repeat(4,1fr);gap:16px}
.lic .card{background:var(--green-bg);border:1px solid #c4e3ce;border-radius:var(--radius);padding:22px 20px}
.lic h3{font-size:15.5px;color:var(--green-d)}
.lic p{font-size:13.5px;color:#315c44;margin-top:6px}

/* buy */
.buy{background:var(--code);color:#e8f0ea;border-radius:18px;padding:52px 40px;text-align:center}
.buy h2{font-size:28px;color:#fff}
.buy p{color:#a8b8ae;margin:12px auto 26px;max-width:560px}
.buy .ways{display:flex;gap:16px;justify-content:center;flex-wrap:wrap}
.buy .way{background:rgba(255,255,255,.07);border:1px solid rgba(255,255,255,.14);border-radius:12px;padding:16px 28px;min-width:250px}
.buy .way .k{font-size:12.5px;color:#8fa396;letter-spacing:1px}
.buy .way .v{font-size:17px;color:#fff;margin-top:5px;font-family:Consolas,monospace}
.buy .note{font-size:13px;color:#7d8f84;margin-top:22px}

/* faq */
.faq{max-width:780px;margin:0 auto}
.faq details{background:var(--panel);border:1px solid var(--line);border-radius:11px;margin-bottom:11px;padding:15px 20px}
.faq summary{cursor:pointer;font-weight:600;font-size:15.5px}
.faq details[open]{border-color:#bcd9c6}
.faq .a{color:var(--mut);font-size:14.5px;margin-top:9px}

footer{border-top:1px solid var(--line);padding:30px 0 40px;color:#8a958e;font-size:13.5px;text-align:center}
footer .brand{justify-content:center;display:flex;margin-bottom:8px}

@media(max-width:860px){
  .feat,.steps,.lic{grid-template-columns:1fr 1fr}
  .shots{grid-template-columns:1fr}
  .hero h1{font-size:33px}
  nav .links a:not(.nav-cta){display:none}
}
@media(max-width:560px){
  .feat,.steps,.lic{grid-template-columns:1fr}
  .buy{padding:40px 22px}
}

/* ===== 文档页 ===== */
.doc{display:grid;grid-template-columns:210px minmax(0,1fr);gap:38px;align-items:start;padding-top:44px}
.doc-toc{position:sticky;top:76px;font-size:14px}
.doc-toc .t{font-weight:700;margin-bottom:10px;font-size:13px;color:#8a958e;letter-spacing:1px}
.doc-toc a{display:block;padding:5px 0;color:var(--mut);border-left:2px solid transparent;padding-left:11px}
.doc-toc a:hover{color:var(--green);border-left-color:var(--green);text-decoration:none}
.doc-body h2{font-size:25px;margin:44px 0 14px;padding-top:10px}
.doc-body h2:first-child{margin-top:0}
.doc-body h3{font-size:17px;margin:26px 0 8px}
.doc-body p{margin:10px 0}
.doc-body ul,.doc-body ol{margin:10px 0 10px 22px}
.doc-body li{margin:5px 0}
.doc-body table{width:100%;border-collapse:collapse;margin:14px 0;font-size:14.5px}
.doc-body th,.doc-body td{border:1px solid var(--line);padding:9px 12px;text-align:left}
.doc-body th{background:#f2f5f1}
.doc-body code{background:#f0f3ef;border:1px solid var(--line);border-radius:5px;padding:1px 7px;font-size:13.5px;font-family:Consolas,monospace}
.doc-body .tip{background:var(--green-bg);border:1px solid #c4e3ce;border-radius:10px;padding:13px 18px;margin:16px 0;font-size:14.5px;color:#315c44}
.doc-body .tip strong{color:var(--green-d)}
.crumb{font-size:13.5px;color:#8a958e;padding:18px 0 0}
.crumb a{color:var(--mut)}
@media(max-width:860px){
  .doc{grid-template-columns:1fr;gap:0}
  .doc-toc{position:static;margin-bottom:26px;border:1px solid var(--line);border-radius:12px;padding:16px;background:var(--panel)}
}