:root {
  --bg: #05060a;
  --bg-soft: #0a0c14;
  --panel: rgba(255, 255, 255, 0.04);
  --panel-border: rgba(255, 255, 255, 0.08);
  --gold: #d9b873;
  --gold-soft: #f0d9a8;
  --gold-deep: #b8954f;
  --text: #ece9e3;
  --text-dim: #9a978f;
  --text-faint: #6a6760;
  --radius: 18px;
  --serif: "Noto Serif SC", "Songti SC", "STSong", Georgia, "Times New Roman", serif;
  --sans: "PingFang SC", "Microsoft YaHei", system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
}

* { margin: 0; padding: 0; box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  background: var(--bg);
  color: var(--text);
  font-family: var(--sans);
  line-height: 1.7;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
}

/* ===== Aurora background ===== */
.aurora {
  position: fixed;
  inset: 0;
  z-index: -2;
  background:
    radial-gradient(1200px 600px at 15% -10%, rgba(217, 184, 115, 0.10), transparent 60%),
    radial-gradient(900px 500px at 90% 10%, rgba(86, 120, 200, 0.12), transparent 60%),
    radial-gradient(1000px 700px at 50% 120%, rgba(180, 90, 150, 0.10), transparent 60%),
    var(--bg);
}
.grain {
  position: fixed;
  inset: 0;
  z-index: -1;
  opacity: 0.04;
  pointer-events: none;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='120' height='120'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='3'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)'/%3E%3C/svg%3E");
}

/* ===== Layout ===== */
.wrap { width: min(1180px, 92vw); margin: 0 auto; }
.section { padding: 120px 0; position: relative; }

/* ===== Nav ===== */
header.nav {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 50;
  transition: background .4s, backdrop-filter .4s, border-color .4s;
  border-bottom: 1px solid transparent;
}
header.nav.scrolled {
  background: rgba(5, 6, 10, 0.72);
  backdrop-filter: blur(18px) saturate(140%);
  border-bottom: 1px solid var(--panel-border);
}
.nav-inner { display: flex; align-items: center; justify-content: space-between; height: 76px; }
.brand { display: flex; align-items: center; gap: 12px; font-family: var(--serif); font-size: 22px; letter-spacing: 2px; }
.brand .seal {
  width: 34px; height: 34px; border-radius: 9px;
  display: grid; place-items: center;
  background: linear-gradient(135deg, var(--gold-soft), var(--gold-deep));
  color: #1a1407; font-weight: 700; font-size: 18px;
  box-shadow: 0 6px 20px rgba(217,184,115,.35);
}
.brand small { color: var(--text-faint); font-family: var(--sans); font-size: 11px; letter-spacing: 3px; display:block; margin-top:-4px;}
.nav-links { display: flex; gap: 34px; align-items: center; }
.nav-links a { color: var(--text-dim); text-decoration: none; font-size: 14.5px; letter-spacing: .5px; transition: color .3s; }
.nav-links a:hover { color: var(--gold-soft); }
.btn {
  display: inline-flex; align-items: center; gap: 8px;
  padding: 12px 24px; border-radius: 999px;
  font-size: 14.5px; letter-spacing: 1px; cursor: pointer;
  border: 1px solid var(--gold-deep);
  background: linear-gradient(135deg, rgba(217,184,115,.16), rgba(217,184,115,.04));
  color: var(--gold-soft); text-decoration: none;
  transition: transform .3s, box-shadow .3s, background .3s;
}
.btn:hover { transform: translateY(-2px); box-shadow: 0 10px 30px rgba(217,184,115,.25); background: linear-gradient(135deg, rgba(217,184,115,.28), rgba(217,184,115,.08)); }
.btn.solid { background: linear-gradient(135deg, var(--gold-soft), var(--gold-deep)); color: #1a1407; border: none; font-weight: 600; }
.btn.ghost { background: transparent; border-color: var(--panel-border); color: var(--text); }
.btn.ghost:hover { border-color: var(--gold-deep); color: var(--gold-soft); box-shadow:none; }

/* ===== Hero ===== */
.hero { min-height: 100vh; display: flex; align-items: center; text-align: center; position: relative; padding-top: 76px; }
.hero .wrap { display: flex; flex-direction: column; align-items: center; }
.eyebrow {
  display: inline-flex; align-items: center; gap: 10px;
  padding: 8px 18px; border-radius: 999px;
  border: 1px solid var(--panel-border); background: var(--panel);
  color: var(--gold-soft); font-size: 13px; letter-spacing: 3px; margin-bottom: 34px;
}
.eyebrow .dot { width: 7px; height: 7px; border-radius: 50%; background: var(--gold); box-shadow: 0 0 12px var(--gold); }
.hero h1 {
  font-family: var(--serif); font-weight: 600;
  font-size: clamp(44px, 8vw, 96px); line-height: 1.08; letter-spacing: 4px;
  background: linear-gradient(180deg, #fff 10%, var(--gold-soft) 70%, var(--gold-deep));
  -webkit-background-clip: text; background-clip: text; color: transparent;
  margin-bottom: 26px;
}
.hero p.lead { color: var(--text-dim); font-size: clamp(16px, 2vw, 20px); max-width: 620px; margin: 0 auto 44px; letter-spacing: 1px; }
.hero-actions { display: flex; gap: 18px; flex-wrap: wrap; justify-content: center; }
.hero-meta { margin-top: 70px; display: flex; gap: 56px; flex-wrap: wrap; justify-content: center; }
.hero-meta .stat { text-align: center; }
.hero-meta .num { font-family: var(--serif); font-size: 34px; color: var(--gold-soft); }
.hero-meta .lbl { color: var(--text-faint); font-size: 13px; letter-spacing: 2px; }

/* floating orb */
.orb {
  position: absolute; width: 520px; height: 520px; border-radius: 50%;
  background: radial-gradient(circle at 35% 30%, rgba(217,184,115,.35), rgba(217,184,115,0) 60%);
  filter: blur(20px); top: 8%; left: 50%; transform: translateX(-50%);
  z-index: -1; animation: float 9s ease-in-out infinite;
}
@keyframes float { 0%,100%{transform:translateX(-50%) translateY(0)} 50%{transform:translateX(-50%) translateY(26px)} }

/* ===== Section heading ===== */
.sec-head { text-align: center; margin-bottom: 70px; }
.sec-head .kicker { color: var(--gold); letter-spacing: 4px; font-size: 13px; text-transform: uppercase; }
.sec-head h2 { font-family: var(--serif); font-size: clamp(30px, 4.5vw, 50px); letter-spacing: 3px; margin: 14px 0 16px; }
.sec-head p { color: var(--text-dim); max-width: 560px; margin: 0 auto; }

/* ===== Features ===== */
.features { display: grid; grid-template-columns: repeat(3, 1fr); gap: 22px; }
.card {
  padding: 36px 30px; border-radius: var(--radius);
  background: var(--panel); border: 1px solid var(--panel-border);
  transition: transform .4s, border-color .4s, background .4s;
  position: relative; overflow: hidden;
}
.card::before {
  content: ""; position: absolute; inset: 0;
  background: radial-gradient(400px circle at var(--mx,50%) var(--my,0%), rgba(217,184,115,.10), transparent 60%);
  opacity: 0; transition: opacity .4s;
}
.card:hover { transform: translateY(-6px); border-color: rgba(217,184,115,.35); }
.card:hover::before { opacity: 1; }
.card .ico {
  width: 52px; height: 52px; border-radius: 13px; display: grid; place-items: center;
  background: linear-gradient(135deg, rgba(217,184,115,.2), rgba(217,184,115,.04));
  border: 1px solid rgba(217,184,115,.3); margin-bottom: 22px;
}
.card .ico svg { width: 26px; height: 26px; stroke: var(--gold-soft); fill: none; stroke-width: 1.6; }
.card h3 { font-family: var(--serif); font-size: 22px; letter-spacing: 1px; margin-bottom: 12px; }
.card p { color: var(--text-dim); font-size: 15px; }

/* ===== Personas ===== */
.personas { display: grid; grid-template-columns: repeat(4, 1fr); gap: 18px; }
.persona {
  border-radius: var(--radius); padding: 30px 24px; text-align: center;
  background: linear-gradient(180deg, rgba(255,255,255,.05), rgba(255,255,255,.01));
  border: 1px solid var(--panel-border); transition: transform .4s, border-color .4s;
}
.persona:hover { transform: translateY(-6px); border-color: rgba(217,184,115,.4); }
.persona .av { width: 78px; height: 78px; border-radius: 50%; margin: 0 auto 18px; display:grid; place-items:center; font-family: var(--serif); font-size: 30px; color: #1a1407; }
.persona h4 { font-family: var(--serif); font-size: 19px; letter-spacing: 1px; }
.persona span { color: var(--text-faint); font-size: 13px; letter-spacing: 2px; }
.persona p { color: var(--text-dim); font-size: 13.5px; margin-top: 10px; }

/* ===== Download ===== */
.download-box {
  border-radius: 28px; padding: 64px 48px; text-align: center;
  background:
    radial-gradient(600px 300px at 50% -20%, rgba(217,184,115,.16), transparent 70%),
    linear-gradient(180deg, rgba(255,255,255,.05), rgba(255,255,255,.01));
  border: 1px solid rgba(217,184,115,.3);
}
.download-box h2 { font-family: var(--serif); font-size: clamp(28px,4vw,46px); letter-spacing: 3px; margin-bottom: 14px; }
.download-box p { color: var(--text-dim); margin-bottom: 30px; }
.ver-pill { display:inline-block; padding:6px 16px; border-radius:999px; border:1px solid var(--panel-border); background:var(--panel); color:var(--gold-soft); font-size:13px; letter-spacing:2px; margin-bottom: 26px; }
.dl-row { display:flex; gap:16px; justify-content:center; flex-wrap:wrap; align-items:center; }
.dl-note { color: var(--text-faint); font-size: 13px; margin-top: 22px; letter-spacing: 1px; }
.dl-size { color: var(--text-dim); font-size: 14px; }

/* ===== Footer ===== */
footer { border-top: 1px solid var(--panel-border); padding: 50px 0 40px; }
.foot-inner { display:flex; justify-content:space-between; align-items:center; flex-wrap:wrap; gap:20px; color: var(--text-faint); font-size: 13px; letter-spacing: 1px; }
.foot-inner a { color: var(--text-dim); text-decoration: none; }
.foot-inner a:hover { color: var(--gold-soft); }

/* ===== Reveal animation ===== */
.reveal { opacity: 0; transform: translateY(28px); transition: opacity .9s cubic-bezier(.2,.7,.2,1), transform .9s cubic-bezier(.2,.7,.2,1); }
.reveal.in { opacity: 1; transform: none; }

/* ===== Toast ===== */
.toast {
  position: fixed; bottom: 30px; left: 50%; transform: translateX(-50%) translateY(20px);
  background: rgba(20,22,30,.95); border: 1px solid var(--panel-border); color: var(--text);
  padding: 14px 26px; border-radius: 12px; z-index: 999; opacity: 0; transition: all .4s; backdrop-filter: blur(10px);
}
.toast.show { opacity: 1; transform: translateX(-50%) translateY(0); }
.toast.err { border-color: #a44; }

@media (max-width: 880px) {
  .features { grid-template-columns: 1fr; }
  .personas { grid-template-columns: repeat(2, 1fr); }
  .nav-links { display: none; }
  .section { padding: 80px 0; }
  .hero-meta { gap: 32px; }
}