:root {
  --bg: #07090d;
  --bg-elevated: #0c1017;
  --panel: #111722;
  --panel-2: #151c28;
  --text: #f5f7fa;
  --muted: #98a4b6;
  --line: rgba(163, 177, 199, 0.18);
  --line-strong: rgba(163, 177, 199, 0.3);
  --accent: #6d9fff;
  --accent-strong: #3d75ff;
  --success: #4fd69c;
  --warning: #f0c461;
  --danger: #ff7d7d;
  --max: 1220px;
  --nav-height: 72px;
  --radius: 22px;
  --shadow: 0 28px 80px rgba(0,0,0,.45);
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  min-width: 320px;
  background:
    radial-gradient(circle at 18% 8%, rgba(55, 101, 190, .14), transparent 30%),
    radial-gradient(circle at 82% 18%, rgba(90, 116, 165, .08), transparent 24%),
    var(--bg);
  color: var(--text);
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", "Microsoft YaHei", Arial, sans-serif;
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
}
body::before {
  content: "";
  position: fixed;
  inset: 0;
  pointer-events: none;
  opacity: .22;
  background-image:
    linear-gradient(rgba(255,255,255,.022) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255,255,255,.022) 1px, transparent 1px);
  background-size: 72px 72px;
  mask-image: linear-gradient(to bottom, black, transparent 72%);
}
img { max-width: 100%; display: block; }
a { color: inherit; text-decoration: none; }
button, input { font: inherit; }
button { color: inherit; }

.container { width: min(calc(100% - 40px), var(--max)); margin-inline: auto; }
.narrow { width: min(calc(100% - 40px), 860px); margin-inline: auto; }

.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  height: var(--nav-height);
  background: rgba(7, 9, 13, .76);
  border-bottom: 1px solid var(--line);
  backdrop-filter: blur(18px);
}
.nav-wrap { height: 100%; display: flex; align-items: center; justify-content: space-between; gap: 28px; }
.brand { display: inline-flex; align-items: center; gap: 11px; font-weight: 760; letter-spacing: -.02em; }
.brand img { width: 34px; height: 34px; }
.brand span { font-size: 18px; }
.site-nav { display: flex; align-items: center; gap: 6px; }
.site-nav a { color: var(--muted); padding: 9px 13px; border-radius: 11px; font-size: 14px; transition: .22s ease; }
.site-nav a:hover, .site-nav a[aria-current="page"] { color: var(--text); background: rgba(255,255,255,.06); }
.nav-cta { border: 1px solid var(--line-strong); color: var(--text)!important; }
.nav-toggle { display: none; background: transparent; border: 0; width: 42px; height: 42px; border-radius: 10px; cursor: pointer; }
.nav-toggle span { display: block; width: 21px; height: 2px; margin: 5px auto; background: var(--text); }

.hero { position: relative; overflow: hidden; padding: 110px 0 84px; }
.hero::after { content:""; position:absolute; width: 620px; height:620px; border-radius:50%; left:50%; top:300px; transform:translateX(-50%); background:rgba(57,103,214,.12); filter:blur(110px); pointer-events:none; }
.hero-copy { position: relative; z-index: 2; max-width: 860px; margin: 0 auto 58px; text-align: center; }
.eyebrow { display: inline-flex; align-items: center; gap: 10px; color: #a8b9d6; font-size: 12px; letter-spacing: .18em; font-weight: 760; text-transform: uppercase; }
.eyebrow::before { content:""; width: 28px; height: 1px; background: var(--accent); box-shadow: 0 0 14px var(--accent); }
h1, h2, h3, p { margin-top: 0; }
h1 { margin-bottom: 22px; font-size: clamp(46px, 7vw, 88px); line-height: 1.02; letter-spacing: -.055em; }
.hero-lead { max-width: 700px; margin: 0 auto 34px; color: #b7c1d0; font-size: clamp(17px, 2vw, 21px); }
.hero-actions { display:flex; justify-content:center; flex-wrap:wrap; gap:12px; }
.btn { display:inline-flex; align-items:center; justify-content:center; gap:9px; min-height:48px; padding: 0 19px; border-radius: 12px; border: 1px solid var(--line-strong); font-weight: 700; font-size:14px; transition: transform .2s ease, background .2s ease, border-color .2s ease; cursor:pointer; }
.btn:hover { transform: translateY(-2px); border-color: rgba(173,194,230,.5); }
.btn-primary { background: var(--text); color:#080b10; border-color:var(--text); }
.btn-secondary { background: rgba(255,255,255,.035); }
.btn-disabled { opacity:.54; cursor:not-allowed; transform:none!important; }
.btn svg { width:16px; height:16px; }
.hero-note { color: var(--muted); font-size: 12px; margin-top: 15px; }
.project-owner { display:inline-flex; align-items:center; justify-content:center; gap:9px; margin:-16px auto 30px; padding:8px 12px; border:1px solid rgba(141,183,255,.18); border-radius:999px; color:#9eabc0; background:rgba(72,105,170,.08); font-size:12px; }
.project-owner-dot { width:6px; height:6px; border-radius:50%; background:var(--accent); box-shadow:0 0 12px rgba(141,183,255,.6); }

.product-frame { position:relative; z-index:2; max-width: 1160px; margin:0 auto; padding: 10px; border:1px solid var(--line); border-radius:30px; background:linear-gradient(145deg, rgba(255,255,255,.07), rgba(255,255,255,.015)); box-shadow:var(--shadow); }
.product-frame::before { content:""; position:absolute; left:15%; right:15%; top:-1px; height:1px; background:linear-gradient(90deg,transparent,#99b9ff,transparent); }
.product-frame img { border-radius:22px; }

.section { position:relative; padding: 108px 0; }
.section-tight { padding: 78px 0; }
.section-head { display:flex; justify-content:space-between; align-items:flex-end; gap:28px; margin-bottom:42px; }
.section-head.center { display:block; max-width:760px; text-align:center; margin-inline:auto; }
.section-kicker { color:var(--accent); font-size:12px; font-weight:800; letter-spacing:.15em; text-transform:uppercase; margin-bottom:12px; }
h2 { font-size: clamp(34px, 5vw, 58px); line-height:1.08; letter-spacing:-.045em; margin-bottom:16px; }
h3 { font-size:22px; line-height:1.25; letter-spacing:-.025em; margin-bottom:10px; }
.section-desc { color:var(--muted); max-width:680px; font-size:17px; }

.stats { display:grid; grid-template-columns:repeat(4,1fr); border:1px solid var(--line); border-radius:var(--radius); overflow:hidden; background:rgba(255,255,255,.025); }
.stat { padding:28px; border-right:1px solid var(--line); }
.stat:last-child { border-right:0; }
.stat strong { display:block; font-size:25px; letter-spacing:-.03em; margin-bottom:4px; }
.stat span { color:var(--muted); font-size:13px; }

.feature-grid { display:grid; grid-template-columns:repeat(12,1fr); gap:18px; }
.feature-card { min-height:260px; padding:26px; border:1px solid var(--line); border-radius:var(--radius); background:linear-gradient(150deg, rgba(255,255,255,.045), rgba(255,255,255,.014)); position:relative; overflow:hidden; transition:.25s ease; }
.feature-card:hover { transform:translateY(-4px); border-color:rgba(129,165,230,.38); }
.feature-card:nth-child(1), .feature-card:nth-child(2) { grid-column:span 6; }
.feature-card:nth-child(n+3) { grid-column:span 4; }
.feature-index { color:var(--accent); font-size:12px; font-weight:800; letter-spacing:.16em; }
.feature-card p { color:var(--muted); max-width:390px; }
.feature-card::after { content:""; position:absolute; width:170px; height:170px; right:-70px; bottom:-85px; border-radius:50%; border:1px solid rgba(112,151,226,.22); box-shadow:0 0 60px rgba(72,114,205,.08) inset; }

.split { display:grid; grid-template-columns: .92fr 1.08fr; align-items:center; gap:64px; }
.media-card { border:1px solid var(--line); border-radius:var(--radius); padding:8px; background:rgba(255,255,255,.035); box-shadow:var(--shadow); }
.media-card img { border-radius:16px; }
.check-list { display:grid; gap:15px; margin:28px 0 0; padding:0; list-style:none; }
.check-list li { display:flex; gap:12px; color:#c4ccd8; }
.check-list li::before { content:""; width:9px; height:9px; flex:0 0 auto; margin-top:9px; border-radius:50%; background:var(--success); box-shadow:0 0 14px rgba(79,214,156,.45); }

.cta-panel { padding:58px; border-radius:30px; border:1px solid var(--line); background:linear-gradient(120deg, rgba(74,114,201,.14), rgba(255,255,255,.025) 55%, rgba(255,255,255,.012)); display:flex; justify-content:space-between; align-items:center; gap:36px; }
.cta-panel p { color:var(--muted); margin-bottom:0; }

.page-hero { padding: 104px 0 64px; }
.page-hero .inner { max-width:850px; }
.page-hero h1 { font-size:clamp(44px,7vw,76px); }
.breadcrumb { color:var(--muted); font-size:13px; margin-bottom:22px; }
.breadcrumb span { color:var(--text); }

.module-list { display:grid; gap:90px; }
.module { display:grid; grid-template-columns:1fr 1fr; gap:54px; align-items:center; }
.module:nth-child(even) .module-media { order:2; }
.module-meta { color:var(--accent); letter-spacing:.14em; font-size:12px; font-weight:800; margin-bottom:12px; }
.module p { color:var(--muted); }

.download-summary { display:grid; grid-template-columns: 1.15fr .85fr; gap:20px; }
.download-main, .info-panel, .contact-card, .about-card { border:1px solid var(--line); border-radius:var(--radius); background:rgba(255,255,255,.025); }
.download-main { padding:36px; }
.version-badge { display:inline-flex; align-items:center; gap:8px; color:#bfd0ec; padding:7px 11px; border-radius:999px; background:rgba(92,136,223,.12); border:1px solid rgba(92,136,223,.22); font-size:12px; font-weight:800; }
.status-row { display:flex; align-items:center; gap:10px; color:var(--warning); margin:24px 0 6px; }
.status-dot { width:9px; height:9px; border-radius:50%; background:var(--warning); box-shadow:0 0 16px rgba(240,196,97,.48); }
.download-options { display:grid; grid-template-columns:1fr 1fr; gap:14px; margin-top:26px; }
.download-option { padding:22px; border:1px solid var(--line); border-radius:16px; background:#0d1219; }
.download-option .meta { color:var(--muted); font-size:13px; margin:10px 0 20px; }
.info-panel { padding:30px; }
.info-list { margin:0; display:grid; }
.info-list div { display:flex; justify-content:space-between; gap:18px; padding:16px 0; border-bottom:1px solid var(--line); }
.info-list div:last-child { border-bottom:0; }
.info-list dt { color:var(--muted); }
.info-list dd { margin:0; text-align:right; }
.notice { margin-top:20px; padding:18px 20px; border-left:3px solid var(--accent); background:rgba(84,124,208,.08); color:#c6d0df; font-size:14px; }

.about-grid { display:grid; grid-template-columns:repeat(3,1fr); gap:18px; }
.about-card { padding:28px; }
.about-card p { color:var(--muted); margin-bottom:0; }

.contact-grid { display:grid; grid-template-columns:repeat(2,1fr); gap:18px; }
.contact-card { padding:28px; display:flex; justify-content:space-between; align-items:center; gap:20px; }
.contact-card small { display:block; color:var(--muted); margin-bottom:5px; }
.contact-card strong { word-break:break-all; }
.copy-btn { flex:0 0 auto; border:1px solid var(--line); background:rgba(255,255,255,.035); border-radius:10px; padding:9px 12px; cursor:pointer; }
.copy-btn:hover { border-color:var(--line-strong); }
.form-note { color:var(--muted); }

.site-footer { border-top:1px solid var(--line); padding:42px 0; margin-top:72px; }
.footer-grid { display:flex; justify-content:space-between; gap:30px; align-items:flex-start; }
.footer-brand p { color:var(--muted); font-size:13px; max-width:430px; margin-top:12px; margin-bottom:0; }
.footer-links { display:flex; flex-wrap:wrap; gap:20px; color:var(--muted); font-size:13px; }
.footer-bottom { margin-top:28px; padding-top:22px; border-top:1px solid var(--line); display:flex; justify-content:space-between; gap:20px; color:#718096; font-size:12px; }
.filing-links { display:flex; flex-wrap:wrap; justify-content:flex-end; gap:8px 16px; }
.filing-links a { color:#8290a5; transition:color .2s ease; }
.filing-links a:hover { color:#c6d4e8; }

.reveal { opacity:0; transform:translateY(18px); transition:opacity .7s ease, transform .7s ease; }
.reveal.visible { opacity:1; transform:none; }
.toast { position:fixed; left:50%; bottom:28px; transform:translate(-50%, 20px); opacity:0; z-index:100; background:#f5f7fa; color:#0b0e13; padding:10px 14px; border-radius:10px; font-size:13px; font-weight:700; transition:.22s ease; pointer-events:none; }
.toast.show { opacity:1; transform:translate(-50%,0); }

@media (max-width: 900px) {
  .site-nav { position:absolute; top:calc(var(--nav-height) - 1px); left:0; right:0; display:none; flex-direction:column; align-items:stretch; padding:14px 20px 22px; background:rgba(7,9,13,.98); border-bottom:1px solid var(--line); }
  .site-nav.open { display:flex; }
  .nav-toggle { display:block; }
  .stats { grid-template-columns:repeat(2,1fr); }
  .stat:nth-child(2) { border-right:0; }
  .stat:nth-child(-n+2) { border-bottom:1px solid var(--line); }
  .feature-card, .feature-card:nth-child(n) { grid-column:span 6; }
  .split, .module, .download-summary { grid-template-columns:1fr; gap:36px; }
  .module:nth-child(even) .module-media { order:0; }
  .about-grid { grid-template-columns:1fr; }
  .cta-panel { padding:36px; align-items:flex-start; flex-direction:column; }
}

@media (max-width: 640px) {
  .container, .narrow { width:min(calc(100% - 28px), var(--max)); }
  .hero { padding:80px 0 58px; }
  .section { padding:78px 0; }
  .section-head { display:block; }
  .stats { grid-template-columns:1fr; }
  .stat { border-right:0; border-bottom:1px solid var(--line); }
  .stat:last-child { border-bottom:0; }
  .feature-card, .feature-card:nth-child(n) { grid-column:1/-1; }
  .download-options, .contact-grid { grid-template-columns:1fr; }
  .download-main, .info-panel { padding:24px; }
  .contact-card { align-items:flex-start; }
  .footer-grid, .footer-bottom { flex-direction:column; }
  .page-hero { padding-top:80px; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior:auto; }
  *, *::before, *::after { animation-duration:.01ms!important; transition-duration:.01ms!important; }
  .reveal { opacity:1; transform:none; }
}