:root{
  --bg:#f7f8fc;
  --fg:#101322;
  --muted:#5b6178;
  --line:#e5e8f2;
  --card:#ffffff;
  --brand:#3b5bff;
  --brand2:#7b3bff;
  --accent:#00b3a4;
  --warn:#b26a00;
  --shadow:0 10px 30px rgba(21,29,74,.08);
  --radius:16px;
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{
  margin:0;background:var(--bg);color:var(--fg);
  font:16px/1.7 -apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Hiragino Sans GB","Microsoft YaHei",sans-serif;
  -webkit-font-smoothing:antialiased;
}
a{color:var(--brand);text-decoration:none}
a:hover{text-decoration:underline}
code{font-family:ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;font-size:.92em;
  background:#eef1ff;color:#26327a;padding:2px 6px;border-radius:6px}
pre{background:#0f1424;color:#dfe6ff;padding:14px 16px;border-radius:12px;overflow:auto}
pre code{background:none;color:inherit;padding:0}
.wrap{max-width:1080px;margin:0 auto;padding:0 22px}

/* nav */
.nav{position:sticky;top:0;z-index:20;backdrop-filter:blur(12px);
  background:rgba(247,248,252,.82);border-bottom:1px solid var(--line)}
.nav-in{display:flex;align-items:center;justify-content:space-between;height:62px}
.brand{display:flex;align-items:center;gap:10px;color:var(--fg)}
.brand:hover{text-decoration:none}
.logo{display:inline-grid;place-items:center;width:34px;height:34px;border-radius:10px;
  background:linear-gradient(135deg,var(--brand),var(--brand2));color:#fff;font-weight:800;letter-spacing:.5px}
.brand-t{font-weight:650}
.links{display:flex;gap:22px;align-items:center;font-size:14.5px}
.links a{color:#3a4060}
.links a.ext{color:var(--brand);font-weight:600}

/* hero */
.hero{padding:64px 0 34px;background:
  radial-gradient(900px 380px at 12% -10%,#e7ecff 0%,rgba(231,236,255,0) 60%),
  radial-gradient(700px 320px at 92% 0%,#f2e9ff 0%,rgba(242,233,255,0) 60%)}
.hero-in{display:grid;grid-template-columns:1.05fr .95fr;gap:44px;align-items:center}
.pill{display:inline-block;font-size:13px;color:#2b3aa0;background:#e8ecff;border:1px solid #d5dcff;
  padding:6px 12px;border-radius:999px;margin-bottom:18px}
h1{font-size:46px;line-height:1.14;margin:0 0 16px;letter-spacing:-.6px}
.grad{background:linear-gradient(100deg,var(--brand),var(--brand2) 70%);-webkit-background-clip:text;background-clip:text;color:transparent}
.lede{font-size:17px;color:#3c4260;margin:0 0 26px;max-width:36em}
.cta{display:flex;gap:12px;flex-wrap:wrap}
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;
  height:44px;padding:0 20px;border-radius:12px;font-weight:650;font-size:15px;border:1px solid transparent;
  cursor:pointer;transition:.16s ease}
.btn:hover{transform:translateY(-1px);text-decoration:none}
.btn.primary{background:linear-gradient(135deg,var(--brand),#5a3bff);color:#fff;box-shadow:0 10px 22px rgba(59,91,255,.28)}
.btn.ghost{background:#fff;border-color:var(--line);color:#2b3150}
.btn.tiny{height:32px;padding:0 12px;font-size:13px;border-radius:9px;background:#fff;border-color:var(--line)}
.btn.disabled{background:#c9cee4;box-shadow:none;color:#fff;pointer-events:none}
.fine{margin-top:16px;font-size:13px;color:var(--muted)}
.hero-art img{width:100%;border-radius:18px;box-shadow:var(--shadow);display:block}
.cap{font-size:12.5px;color:var(--muted);margin:10px 2px 0;text-align:center}

/* notice */
.notice{padding:26px 0}
.notice-in{display:flex;gap:14px;align-items:flex-start;background:#fff8e8;border:1px solid #f1dfb6;
  border-radius:14px;padding:18px 20px}
.notice-ico{flex:none;width:26px;height:26px;border-radius:50%;background:#f0a500;color:#fff;
  display:grid;place-items:center;font-weight:800;margin-top:2px}
.notice b{display:block;margin-bottom:4px}
.notice p{margin:0;color:#6a5320;font-size:14.5px}

/* cards */
.cards{display:grid;grid-template-columns:repeat(auto-fit,minmax(230px,1fr));gap:16px;padding:14px 0}
.card{background:var(--card);border:1px solid var(--line);border-radius:var(--radius);padding:20px 20px 18px;
  box-shadow:0 4px 14px rgba(21,29,74,.04)}
.card h3{margin:0 0 8px;font-size:16.5px}
.card p{margin:0;color:var(--muted);font-size:14.5px}
.card.link:hover{text-decoration:none;border-color:#c9d3ff;box-shadow:var(--shadow);transform:translateY(-1px)}
.card .go{display:block;margin-top:12px;font-size:13px;color:var(--brand)}

/* sections */
.section{padding:54px 0}
.s-head{margin-bottom:22px}
.s-head h2{font-size:30px;margin:0 0 6px;letter-spacing:-.3px}
.s-head p{margin:0;color:var(--muted);font-size:14.5px}

/* download */
.dl-card{display:flex;justify-content:space-between;gap:28px;align-items:center;
  background:#fff;border:1px solid var(--line);border-radius:18px;padding:24px 26px;box-shadow:var(--shadow)}
.dl-title{font-size:20px;font-weight:700;margin-bottom:6px}
.dl-meta{color:var(--muted);font-size:14.5px}
.dl-note{margin-top:10px;font-size:13px;color:#7a809a}
.dl-right{text-align:center;flex:none}
.dl-size{margin-top:8px;font-size:12.5px;color:var(--muted)}
.tip{margin:14px 2px 0;font-size:13px;color:var(--muted)}

/* steps */
.steps{list-style:none;margin:0;padding:0;display:grid;gap:14px}
.steps li{display:flex;gap:16px;background:#fff;border:1px solid var(--line);border-radius:14px;padding:18px 20px}
.steps .n{flex:none;width:34px;height:34px;border-radius:10px;background:#eef1ff;color:#2b3aa0;
  display:grid;place-items:center;font-weight:800}
.steps h3{margin:2px 0 6px;font-size:16.5px}
.steps p{margin:0 0 6px;color:#3f4566;font-size:14.8px}
.steps .mini{margin:0;color:var(--muted);font-size:13px}
.steps pre{margin:10px 0}

/* faq */
details{background:#fff;border:1px solid var(--line);border-radius:12px;padding:14px 18px;margin-bottom:10px}
details summary{cursor:pointer;font-weight:650;outline:none}
details p{margin:10px 0 0;color:#454b6b;font-size:14.6px}

/* community */
.copyrow{display:flex;align-items:center;gap:10px;margin-top:12px}
.copyrow code{font-size:15px;letter-spacing:1px}

.plain{margin:0;padding-left:20px;color:#454b6b;font-size:14.6px}
.plain li{margin:6px 0}

footer{border-top:1px solid var(--line);margin-top:30px;padding:26px 0 40px;background:#fff}
.foot-in{display:flex;justify-content:space-between;gap:20px;align-items:center;font-size:14px}
.muted{color:var(--muted);font-size:12.5px;margin-top:4px}
.foot-links{display:flex;gap:16px}

@media (max-width:860px){
  .hero-in{grid-template-columns:1fr;gap:26px}
  h1{font-size:36px}
  .nav .links{display:none}
  .dl-card{flex-direction:column;align-items:flex-start}
  .dl-right{text-align:left}
  .foot-in{flex-direction:column;align-items:flex-start}
}