:root {
  --bg: #0b0e14;
  --surface: #151a23;
  --surface-2: #1b2230;
  --border: #232b38;
  --text: #e6edf3;
  --text-dim: #9aa7b5;
  --accent: #ff6b35;
  --accent-2: #f7931e;
  --accent-soft: rgba(255, 107, 53, 0.15);
  --radius: 16px;
}

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

html { scroll-behavior: smooth; }

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC",
    "Microsoft YaHei", "Hiragino Sans GB", system-ui, sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

.bg-glow {
  position: fixed;
  inset: 0;
  z-index: 0;
  background:
    radial-gradient(60% 50% at 75% 0%, rgba(255, 107, 53, 0.18), transparent 70%),
    radial-gradient(50% 50% at 10% 20%, rgba(247, 147, 30, 0.10), transparent 70%);
  pointer-events: none;
}

main, .nav, .footer { position: relative; z-index: 1; }

/* Nav */
.nav {
  max-width: 1080px;
  margin: 0 auto;
  padding: 22px 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}
.brand { display: flex; align-items: center; gap: 10px; }
.brand-mark {
  width: 34px; height: 34px;
  display: grid; place-items: center;
  border-radius: 9px;
  background: linear-gradient(135deg, var(--accent), var(--accent-2));
  color: #1a1205; font-weight: 800; font-size: 18px;
}
.brand-name { font-weight: 700; font-size: 19px; letter-spacing: .3px; }
.nav-links { display: flex; align-items: center; gap: 22px; }
.nav-links a { color: var(--text-dim); text-decoration: none; font-size: 15px; transition: color .2s; }
.nav-links a:hover { color: var(--text); }
.nav-cta {
  padding: 8px 16px;
  border: 1px solid var(--border);
  border-radius: 999px;
  color: var(--text) !important;
}
.nav-cta:hover { border-color: var(--accent); }

/* Hero */
.hero {
  max-width: 860px;
  margin: 40px auto 20px;
  padding: 40px 24px 30px;
  text-align: center;
}
.eyebrow {
  display: inline-block;
  color: var(--accent-2);
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 1px;
  text-transform: uppercase;
  margin-bottom: 18px;
}
.hero-title {
  font-size: clamp(38px, 7vw, 68px);
  line-height: 1.08;
  font-weight: 800;
  letter-spacing: -0.5px;
}
.accent {
  background: linear-gradient(120deg, var(--accent), var(--accent-2));
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}
.hero-sub {
  max-width: 620px;
  margin: 22px auto 0;
  color: var(--text-dim);
  font-size: clamp(15px, 2.2vw, 18px);
}
.hero-actions {
  margin-top: 34px;
  display: flex; gap: 14px; justify-content: center; flex-wrap: wrap;
}
.hero-meta {
  margin-top: 20px;
  color: var(--text-dim);
  font-size: 14px;
}

/* Buttons */
.btn {
  display: inline-flex; align-items: center; justify-content: center;
  padding: 13px 26px;
  border-radius: 999px;
  font-size: 16px; font-weight: 700;
  text-decoration: none;
  cursor: pointer;
  transition: transform .15s ease, box-shadow .25s ease, background .2s;
}
.btn-primary {
  background: linear-gradient(120deg, var(--accent), var(--accent-2));
  color: #1a1205;
  box-shadow: 0 8px 30px rgba(255, 107, 53, 0.35);
}
.btn-primary:hover { transform: translateY(-2px); box-shadow: 0 12px 38px rgba(255, 107, 53, 0.5); }
.btn-ghost {
  background: var(--surface);
  color: var(--text);
  border: 1px solid var(--border);
}
.btn-ghost:hover { border-color: var(--accent); }
.btn-block { width: 100%; margin-top: 6px; }

/* Features */
.features {
  max-width: 1080px;
  margin: 50px auto 10px;
  padding: 30px 24px;
}
.section-title {
  text-align: center;
  font-size: clamp(26px, 4vw, 36px);
  font-weight: 800;
  margin-bottom: 34px;
}
.feature-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(230px, 1fr));
  gap: 18px;
}
.card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 26px 22px;
  transition: transform .2s, border-color .2s, background .2s;
}
.card:hover {
  transform: translateY(-4px);
  border-color: rgba(255, 107, 53, 0.5);
  background: var(--surface-2);
}
.card-icon { font-size: 30px; margin-bottom: 14px; }
.card h3 { font-size: 18px; margin-bottom: 8px; }
.card p { color: var(--text-dim); font-size: 14.5px; }

/* Download */
.download {
  max-width: 1080px;
  margin: 40px auto 30px;
  padding: 20px 24px 50px;
}
.download-card {
  max-width: 560px;
  margin: 0 auto;
  background: linear-gradient(180deg, var(--surface-2), var(--surface));
  border: 1px solid var(--border);
  border-radius: 22px;
  padding: 34px 30px;
  text-align: center;
  box-shadow: 0 20px 60px rgba(0, 0, 0, 0.35);
}
.download-head { display: flex; align-items: center; justify-content: center; gap: 14px; margin-bottom: 22px; }
.download-head h2 { font-size: 26px; font-weight: 800; }
.ver-badge {
  background: var(--accent-soft);
  color: var(--accent-2);
  border: 1px solid rgba(255, 107, 53, 0.4);
  padding: 5px 12px;
  border-radius: 999px;
  font-size: 14px;
  font-weight: 700;
}
.spec-list {
  list-style: none;
  text-align: left;
  margin: 0 auto 26px;
  max-width: 360px;
}
.spec-list li {
  display: flex; justify-content: space-between;
  padding: 11px 2px;
  border-bottom: 1px solid var(--border);
  font-size: 15px;
}
.spec-list li span { color: var(--text-dim); }
.download-note { margin-top: 16px; color: var(--text-dim); font-size: 13px; }

/* Footer */
.footer {
  max-width: 1080px;
  margin: 0 auto;
  padding: 30px 24px 50px;
  text-align: center;
  color: var(--text-dim);
  font-size: 14px;
  border-top: 1px solid var(--border);
}
.footer-sub { margin-top: 6px; font-size: 12.5px; opacity: .8; }

@media (max-width: 520px) {
  .hero { margin-top: 20px; padding-top: 24px; }
  .spec-list { font-size: 14px; }
}