:root {
  --bg: #0e161b; --chrome: #131c22; --raised: #1b252c; --line: #22303a; --line-strong: #2f4b4c;
  --txt: #e9f0f2; --txt-2: #c3ccd1; --txt-3: #96a3aa; --txt-5: #62707a;
  --brand: #46cfc0; --brand-hover: #63dccf; --amber: #e5b04a;
  --radius: 12px; --max: 960px;
}
* { box-sizing: border-box; }
html { color-scheme: dark; }
body { margin: 0; background: var(--bg); color: var(--txt); font: 15px/1.6 -apple-system, BlinkMacSystemFont, "PingFang SC", "Helvetica Neue", "Noto Sans SC", sans-serif; -webkit-font-smoothing: antialiased; }
a { color: inherit; text-decoration: none; }
code, pre { font-family: ui-monospace, SFMono-Regular, Menlo, monospace; font-size: 13px; }
.muted { color: var(--txt-3); }

.nav { position: sticky; top: 0; z-index: 2; display: flex; align-items: center; gap: 24px; padding: 14px 24px; background: color-mix(in srgb, var(--chrome) 88%, transparent); backdrop-filter: blur(10px); border-bottom: 1px solid var(--line); }
.brand { display: flex; align-items: center; gap: 10px; font-weight: 600; font-size: 16px; letter-spacing: -0.01em; }
.brand img { border-radius: 8px; }
.nav nav { margin-left: auto; display: flex; gap: 20px; font-size: 13.5px; color: var(--txt-3); }
.nav nav a:hover { color: var(--txt); }

main { max-width: var(--max); margin: 0 auto; padding: 0 24px 80px; }
.hero { position: relative; padding: 96px 0 64px; text-align: center; overflow: hidden; }
.glow { position: absolute; border-radius: 50%; pointer-events: none; }
.glow-a { top: -160px; left: 50%; width: 560px; height: 560px; margin-left: -280px; background: radial-gradient(circle, rgba(70,207,192,0.16) 0%, rgba(70,207,192,0) 68%); }
.hero h1 { position: relative; margin: 0 0 16px; font-size: clamp(34px, 6vw, 52px); line-height: 1.2; letter-spacing: -0.02em; font-weight: 600; }
.lede { position: relative; max-width: 520px; margin: 0 auto 36px; color: var(--txt-2); font-size: 16px; }

.download { position: relative; display: flex; flex-wrap: wrap; justify-content: center; gap: 12px; }
.btn { display: inline-flex; flex-direction: column; align-items: center; gap: 2px; min-width: 240px; padding: 14px 22px; border-radius: var(--radius); border: 1px solid var(--line-strong); background: var(--raised); color: var(--txt); cursor: pointer; font: inherit; transition: transform .12s ease, background .12s ease, border-color .12s ease; }
.btn:hover { transform: translateY(-1px); }
.btn-primary { background: var(--brand); border-color: var(--brand); color: #082320; }
.btn-primary:hover { background: var(--brand-hover); border-color: var(--brand-hover); }
.btn-primary .btn-label { display: inline-flex; align-items: center; gap: 8px; }
.btn-ghost { color: var(--txt-3); cursor: default; }
.btn-ghost:hover { transform: none; }
.btn-label { font-weight: 600; font-size: 15px; }
.btn-meta { font-size: 12px; opacity: .85; }
.fineprint { position: relative; margin: 18px 0 0; font-size: 12.5px; color: var(--txt-5); }

.features { display: grid; grid-template-columns: repeat(auto-fit, minmax(240px, 1fr)); gap: 14px; margin: 24px 0 72px; }
.feature { padding: 20px; border: 1px solid var(--line); border-radius: var(--radius); background: var(--chrome); }
.feature h3 { margin: 0 0 6px; font-size: 15px; }
.feature p { margin: 0; color: var(--txt-3); font-size: 13.5px; }

.steps, .faq { max-width: 680px; margin: 0 auto 72px; }
h2 { font-size: 22px; letter-spacing: -0.01em; margin: 0 0 10px; }
.steps ol { padding-left: 22px; color: var(--txt-2); }
.steps li { margin: 10px 0; }
.steps details { margin-top: 14px; color: var(--txt-3); font-size: 13.5px; }
.steps summary { cursor: pointer; }
.steps pre { margin: 10px 0 0; padding: 12px 14px; background: var(--chrome); border: 1px solid var(--line); border-radius: 10px; overflow-x: auto; color: var(--txt-2); }
.faq dl { margin: 0; }
.faq dt { font-weight: 600; margin-top: 16px; }
.faq dd { margin: 4px 0 0; color: var(--txt-3); }

footer { display: flex; gap: 16px; justify-content: space-between; max-width: var(--max); margin: 0 auto; padding: 20px 24px 40px; border-top: 1px solid var(--line); font-size: 12.5px; color: var(--txt-5); }
@media (max-width: 600px) { .nav nav { display: none; } .hero { padding-top: 64px; } .btn { width: 100%; } footer { flex-direction: column; } }