:root {
  --bg: #070a11;
  --panel: rgba(255, 255, 255, 0.035);
  --panel-strong: rgba(255, 255, 255, 0.055);
  --line: rgba(255, 255, 255, 0.09);
  --text: #eef2fb;
  --muted: #9aa5bb;
  --dim: #6d7890;
  --violet: #8b7cff;
  --violet-2: #6366f1;
  --cyan: #5eead4;
  --blue: #7dd3fc;
  --radius: 16px;
  --wrap: 1160px;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; scroll-padding-top: 86px; }
body {
  margin: 0;
  min-height: 100vh;
  background: var(--bg);
  color: var(--text);
  font-family: "Segoe UI", "Microsoft YaHei", system-ui, -apple-system, sans-serif;
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}
body::before {
  content: "";
  position: fixed;
  inset: 0;
  z-index: -1;
  background-image:
    linear-gradient(rgba(255, 255, 255, 0.022) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 255, 255, 0.022) 1px, transparent 1px);
  background-size: 64px 64px;
  mask-image: radial-gradient(ellipse at 50% 0%, #000 20%, transparent 78%);
}
::selection { background: rgba(139, 124, 255, 0.35); color: #fff; }
a { color: inherit; text-decoration: none; }
img { max-width: 100%; }
.ico {
  width: 18px; height: 18px; flex: none;
  fill: none; stroke: currentColor; stroke-width: 1.8;
  stroke-linecap: round; stroke-linejoin: round;
}
h1, h2, h3, h4 { line-height: 1.18; }
.wrap { width: min(var(--wrap), calc(100% - 48px)); margin: 0 auto; }
.hero > *, .shots > *, .feature-grid > *, .benefits > *, .steps > *, .stats > *, .download-card > * { min-width: 0; }
.skip {
  position: fixed; left: 12px; top: -60px; z-index: 100;
  padding: 10px 14px; border-radius: 10px; background: #fff; color: #111;
  transition: top 0.2s;
}
.skip:focus { top: 12px; }
:focus-visible { outline: 2px solid var(--cyan); outline-offset: 3px; border-radius: 6px; }

.glow { position: fixed; z-index: -2; border-radius: 50%; filter: blur(90px); pointer-events: none; }
.glow-a { width: 620px; height: 620px; left: -180px; top: -240px; background: rgba(99, 102, 241, 0.3); }
.glow-b { width: 620px; height: 620px; right: -220px; top: 180px; background: rgba(94, 234, 212, 0.11); }

/* ---------- nav ---------- */
.nav {
  position: sticky; top: 0; z-index: 50;
  background: rgba(7, 10, 17, 0.72);
  backdrop-filter: blur(18px);
  border-bottom: 1px solid var(--line);
}
.nav-inner { display: flex; align-items: center; gap: 28px; height: 74px; }
.brand { display: inline-flex; align-items: center; gap: 11px; flex-shrink: 0; }
.brand-icon { border-radius: 11px; box-shadow: 0 6px 18px -6px rgba(0, 0, 0, 0.8); }
.brand-text { display: flex; flex-direction: column; line-height: 1.15; }
.brand-text strong { font-size: 15px; letter-spacing: 0.01em; }
.brand-text small { font-size: 8.5px; letter-spacing: 0.16em; color: var(--dim); }
.ver { font-size: 11px; color: #c7d2fe; background: rgba(139, 124, 255, 0.14); border: 1px solid rgba(139, 124, 255, 0.28); border-radius: 999px; padding: 2px 8px; }
.links { display: flex; gap: 26px; margin-left: auto; font-size: 13.5px; color: var(--muted); }
.links a { transition: color 0.18s; }
.links a:hover { color: #fff; }
.nav .btn { margin-left: auto; }
.links + .btn { margin-left: 0; }

/* ---------- buttons ---------- */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 8px;
  border: 1px solid transparent; border-radius: 12px;
  padding: 10px 16px; font-size: 14px; font-weight: 600; font-family: inherit;
  color: var(--text); cursor: pointer; white-space: nowrap;
  transition: transform 0.18s, box-shadow 0.18s, background 0.18s, border-color 0.18s;
}
.btn .ico { width: 17px; height: 17px; }
.btn-primary {
  background: linear-gradient(135deg, #8b7cff, #6366f1);
  box-shadow: 0 12px 32px -14px rgba(99, 102, 241, 0.9);
}
.btn-primary:hover { transform: translateY(-1px); box-shadow: 0 18px 38px -14px rgba(99, 102, 241, 1); }
.btn-ghost { background: rgba(255, 255, 255, 0.045); border-color: var(--line); }
.btn-ghost:hover { background: rgba(255, 255, 255, 0.08); border-color: rgba(255, 255, 255, 0.18); }
.btn-sm { padding: 8px 14px; font-size: 13px; border-radius: 10px; }
.btn-lg { padding: 14px 22px; font-size: 15px; border-radius: 14px; }
.size {
  font-size: 11.5px; font-weight: 500; padding: 2px 7px; border-radius: 999px;
  background: rgba(0, 0, 0, 0.2); color: rgba(255, 255, 255, 0.86);
}

/* ---------- hero ---------- */
.hero {
  display: grid; grid-template-columns: 1.02fr 0.98fr; gap: 56px;
  align-items: center; padding: 76px 0 54px;
}
.eyebrow {
  display: inline-flex; align-items: center; gap: 8px;
  font-size: 11.5px; letter-spacing: 0.05em; color: #c7d2fe;
  background: rgba(139, 124, 255, 0.1); border: 1px solid rgba(139, 124, 255, 0.26);
  padding: 6px 12px; border-radius: 999px;
}
.eyebrow .dot { width: 6px; height: 6px; border-radius: 50%; background: var(--cyan); box-shadow: 0 0 0 4px rgba(94, 234, 212, 0.12); }
h1 { margin: 22px 0 18px; font-size: clamp(46px, 6.4vw, 84px); font-weight: 800; letter-spacing: -0.045em; }
.grad {
  background: linear-gradient(100deg, #a78bfa 0%, #7dd3fc 55%, #5eead4 100%);
  -webkit-background-clip: text; background-clip: text; color: transparent;
}
.lede { margin: 0; max-width: 560px; font-size: 16.5px; line-height: 1.85; color: var(--muted); }
.cta { display: flex; flex-wrap: wrap; gap: 12px; margin: 28px 0 18px; }
.trust { display: flex; flex-wrap: wrap; gap: 8px 18px; font-size: 12.5px; color: var(--dim); }
.trust span { display: inline-flex; align-items: center; gap: 6px; }
.trust span::before { content: ""; width: 5px; height: 5px; border-radius: 50%; background: rgba(94, 234, 212, 0.75); }
.fineprint { margin: 16px 0 0; font-size: 11.5px; color: var(--dim); line-height: 1.75; }

.hero-shot { position: relative; }
.window {
  overflow: hidden; border-radius: 18px; border: 1px solid rgba(255, 255, 255, 0.13);
  background: #0c111c;
  box-shadow: 0 34px 80px -34px rgba(0, 0, 0, 0.95), 0 0 0 1px rgba(139, 124, 255, 0.06);
  transform: perspective(1400px) rotateY(-2deg) rotateX(1deg);
}
.window-bar { display: flex; align-items: center; gap: 7px; padding: 10px 14px; background: rgba(255, 255, 255, 0.03); border-bottom: 1px solid rgba(255, 255, 255, 0.06); }
.window-bar i { width: 9px; height: 9px; border-radius: 50%; background: #394155; }
.window-title { margin-left: 8px; font-size: 10.5px; letter-spacing: 0.05em; color: var(--dim); }
.window img { display: block; width: 100%; height: auto; }
.float-card {
  position: absolute; display: flex; align-items: baseline; gap: 6px;
  padding: 10px 14px; border-radius: 13px;
  background: rgba(12, 17, 28, 0.9); border: 1px solid var(--line);
  box-shadow: 0 20px 42px -22px #000; backdrop-filter: blur(10px);
}
.float-card strong { font-size: 21px; letter-spacing: -0.02em; }
.float-card span { font-size: 10.5px; color: var(--dim); }
.fc-1 { right: -14px; top: -18px; }
.fc-2 { left: -18px; bottom: -20px; }

/* ---------- stats ---------- */
.stats {
  display: grid; grid-template-columns: repeat(4, 1fr);
  border-top: 1px solid var(--line); border-bottom: 1px solid var(--line);
  padding: 22px 0;
}
.stats div { text-align: center; border-left: 1px solid var(--line); }
.stats div:first-child { border-left: 0; }
.stats strong { display: block; font-size: 23px; letter-spacing: -0.02em; }
.stats span { font-size: 11.5px; color: var(--dim); }

/* ---------- sections ---------- */
.section { padding: 86px 0 0; }
.section-head { max-width: 700px; margin-bottom: 30px; }
.kicker { font-size: 11px; font-weight: 700; letter-spacing: 0.18em; text-transform: uppercase; color: #a5b4fc; }
.section-head h2 { margin: 10px 0 10px; font-size: clamp(28px, 3.6vw, 40px); letter-spacing: -0.035em; }
.section-head p { margin: 0; color: var(--muted); font-size: 14.5px; }

.feature-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 14px; }
.feature {
  position: relative; overflow: hidden; padding: 22px;
  border: 1px solid var(--line); border-radius: var(--radius);
  background: linear-gradient(180deg, rgba(255, 255, 255, 0.05), rgba(255, 255, 255, 0.015));
  transition: transform 0.22s, border-color 0.22s;
}
.feature::after {
  content: ""; position: absolute; inset: 0; pointer-events: none;
  background: radial-gradient(380px at 20% 0%, rgba(139, 124, 255, 0.14), transparent 65%);
  opacity: 0; transition: opacity 0.22s;
}
.feature:hover { transform: translateY(-3px); border-color: rgba(139, 124, 255, 0.34); }
.feature:hover::after { opacity: 1; }
.feature .ico { width: 22px; height: 22px; color: #a78bfa; margin-bottom: 12px; }
.feature h3 { margin: 0 0 6px; font-size: 16px; }
.feature p { margin: 0; font-size: 12.8px; line-height: 1.75; color: var(--muted); }

.benefits { display: grid; grid-template-columns: repeat(3, 1fr); gap: 14px; margin-top: 14px; }
.benefit {
  padding: 22px; border: 1px solid rgba(94, 234, 212, 0.16); border-radius: var(--radius);
  background: linear-gradient(160deg, rgba(94, 234, 212, 0.055), rgba(255, 255, 255, 0.012));
}
.benefit .tag { display: inline-block; font-size: 10.5px; letter-spacing: 0.1em; color: #99f6e4; background: rgba(94, 234, 212, 0.1); border: 1px solid rgba(94, 234, 212, 0.22); border-radius: 999px; padding: 2px 8px; }
.benefit h3 { margin: 10px 0 6px; font-size: 15.5px; }
.benefit p { margin: 0; font-size: 12.8px; line-height: 1.75; color: var(--muted); }

/* ---------- shots ---------- */
.shots { display: grid; grid-template-columns: 1fr; gap: 16px; }
.shot { margin: 0; overflow: hidden; border: 1px solid var(--line); border-radius: 18px; background: #0c111c; }
.shot img { display: block; width: 100%; height: auto; }
.shot figcaption { padding: 11px 16px; border-top: 1px solid var(--line); font-size: 11.5px; color: var(--dim); }

/* ---------- download ---------- */
.download { padding: 88px 0 0; }
.download-card {
  position: relative; overflow: hidden;
  display: grid; grid-template-columns: 1.15fr 0.85fr; gap: 40px; align-items: center;
  padding: 40px; border-radius: 24px; border: 1px solid rgba(139, 124, 255, 0.3);
  background:
    radial-gradient(720px at 0% 0%, rgba(139, 124, 255, 0.2), transparent 62%),
    radial-gradient(620px at 100% 100%, rgba(94, 234, 212, 0.1), transparent 62%),
    #0b101b;
  box-shadow: 0 30px 80px -50px rgba(99, 102, 241, 0.9);
}
.download-card::before {
  content: ""; position: absolute; top: 0; left: 8%; right: 8%; height: 1px;
  background: linear-gradient(90deg, transparent, rgba(167, 139, 250, 0.8), transparent);
}
.download h2 { margin: 10px 0 10px; font-size: clamp(30px, 4vw, 43px); letter-spacing: -0.04em; }
.download-sub { margin: 0; color: var(--muted); font-size: 13.5px; }
.sha-card { padding: 18px; border-radius: 15px; border: 1px solid var(--line); background: rgba(0, 0, 0, 0.28); }
.sha-title { font-size: 10.5px; letter-spacing: 0.14em; text-transform: uppercase; color: var(--dim); }
#sha {
  display: block; margin: 10px 0 14px;
  font-family: ui-monospace, Consolas, monospace; font-size: 10.5px; line-height: 1.65;
  color: #c7d2fe; word-break: break-all;
}
.copy-state { margin-left: 8px; font-size: 11.5px; color: var(--cyan); }
.sha-note { margin: 12px 0 0; font-size: 11px; line-height: 1.7; color: var(--dim); }

/* ---------- install ---------- */
.steps { list-style: none; margin: 0; padding: 0; display: grid; grid-template-columns: repeat(3, 1fr); gap: 14px; counter-reset: step; }
.steps li { padding: 22px; border: 1px solid var(--line); border-radius: var(--radius); background: var(--panel); }
.steps li::before { counter-increment: step; content: "0" counter(step); display: block; font-size: 11px; font-weight: 700; letter-spacing: 0.14em; color: #a78bfa; }
.steps h3 { margin: 8px 0 6px; font-size: 15px; }
.steps p { margin: 0; font-size: 12.8px; line-height: 1.75; color: var(--muted); }
.callout {
  margin-top: 16px; padding: 16px 18px; border-radius: 14px;
  border: 1px solid rgba(251, 191, 36, 0.24); background: rgba(251, 191, 36, 0.055);
  color: #e7d8a5; font-size: 12.8px; line-height: 1.8;
}
.callout strong { color: #fde68a; }

/* ---------- faq ---------- */
.faq { display: grid; gap: 10px; max-width: 920px; }
details { border: 1px solid var(--line); border-radius: 14px; background: var(--panel); padding: 0 18px; }
summary { display: flex; justify-content: space-between; align-items: center; gap: 14px; padding: 15px 0; cursor: pointer; font-size: 13.8px; font-weight: 600; list-style: none; }
summary::-webkit-details-marker { display: none; }
summary::after { content: "+"; color: var(--dim); font-size: 18px; font-weight: 400; }
details[open] summary::after { content: "–"; }
details p { margin: 0 0 16px; font-size: 12.8px; line-height: 1.85; color: var(--muted); }

/* ---------- footer ---------- */
footer { margin-top: 90px; border-top: 1px solid var(--line); padding: 44px 0 30px; background: rgba(0, 0, 0, 0.18); }
.footer-grid { display: flex; justify-content: space-between; gap: 40px; flex-wrap: wrap; }
.footer-brand p { margin: 14px 0 0; font-size: 12px; line-height: 1.8; color: var(--dim); }
.footer-links { display: flex; gap: 56px; flex-wrap: wrap; }
.footer-links h4 { margin: 0 0 10px; font-size: 11px; letter-spacing: 0.12em; text-transform: uppercase; color: #c7d2fe; }
.footer-links a, .footer-links span { display: block; margin: 7px 0; font-size: 12px; color: var(--dim); }
.footer-links a:hover { color: #fff; }
.footer-bottom { display: flex; justify-content: space-between; gap: 16px; flex-wrap: wrap; margin-top: 36px; padding-top: 18px; border-top: 1px solid var(--line); font-size: 11px; color: var(--dim); }

/* ---------- motion ---------- */
.reveal { opacity: 1; transform: none; }
html.js .reveal { opacity: 0; transform: translateY(16px); transition: opacity 0.7s ease, transform 0.7s ease; }
html.js .reveal.in { opacity: 1; transform: none; }

@media (max-width: 980px) {
  .hero { grid-template-columns: 1fr; gap: 44px; padding-top: 54px; }
  .hero-shot { max-width: 760px; }
  .feature-grid, .benefits { grid-template-columns: repeat(2, 1fr); }
  .download-card { grid-template-columns: 1fr; gap: 26px; padding: 30px; }
  .shots { grid-template-columns: 1fr; }
  .steps { grid-template-columns: 1fr; }
}

@media (max-width: 720px) {
  .wrap { width: calc(100% - 36px); }
  .nav-inner { height: 64px; gap: 12px; }
  .links { display: none; }
  .nav .btn { margin-left: auto; }
  .brand-text small { display: none; }
  .ver { display: none; }
  h1 { font-size: clamp(42px, 12vw, 60px); }
  .lede { font-size: 15px; }
  .hero { padding: 44px 0 40px; }
  .stats { grid-template-columns: repeat(2, 1fr); gap: 14px 0; padding: 18px 0; }
  .stats div:nth-child(3) { border-left: 0; }
  .feature-grid, .benefits { grid-template-columns: 1fr; }
  .section { padding-top: 64px; }
  .download { padding-top: 64px; }
  .download-card { padding: 24px; border-radius: 20px; }
  .sha-card { padding: 16px; }
  .float-card { display: none; }
  .window { transform: none; }
  .footer-links { gap: 34px; }
  .footer-bottom { flex-direction: column; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { animation-duration: 0.01ms !important; transition-duration: 0.01ms !important; }
  html.js .reveal { opacity: 1; transform: none; }
}