:root {
  --bg: #070a10;
  --bg-2: #0a0e14;
  --panel: #131820;
  --card: #1a1f2e;
  --cyan: #00e5ff;
  --orange: #ff6d3a;
  --purple: #b388ff;
  --green: #69f0ae;
  --red: #ff5252;
  --yellow: #ffd740;
  --blue: #448aff;
  --text: #e8eaed;
  --muted: #9aa0b0;
  --border: #252a36;
}

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

html { scroll-behavior: smooth; }

body {
  background: var(--bg);
  color: var(--text);
  font-family: -apple-system, BlinkMacSystemFont, "PingFang SC", "Microsoft YaHei", sans-serif;
  line-height: 1.6;
  overflow-x: hidden;
}

a { color: inherit; text-decoration: none; }
img { max-width: 100%; display: block; }

.wrap {
  width: min(1120px, calc(100% - 40px));
  margin: 0 auto;
}

/* Nav */
.nav {
  position: sticky;
  top: 0;
  z-index: 50;
  backdrop-filter: blur(16px);
  background: rgba(7, 10, 16, 0.78);
  border-bottom: 1px solid var(--border);
}

.nav-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 68px;
}

.brand {
  display: flex;
  align-items: center;
  gap: 10px;
  font-weight: 700;
  letter-spacing: 0.04em;
}

.brand img { width: 36px; height: 36px; border-radius: 10px; }

.nav-links {
  display: flex;
  gap: 22px;
  color: var(--muted);
  font-size: 14px;
}

.nav-links a:hover { color: var(--cyan); }

.nav-cta {
  padding: 8px 16px;
  border-radius: 8px;
  background: var(--cyan);
  color: #041016;
  font-weight: 700;
  font-size: 13px;
}

.nav-cta:hover { opacity: 0.88; }

.menu-btn {
  display: none;
  background: none;
  border: 1px solid var(--border);
  color: var(--text);
  border-radius: 8px;
  padding: 8px 10px;
}

/* Hero */
.hero {
  position: relative;
  min-height: calc(100vh - 68px);
  display: flex;
  align-items: center;
  isolation: isolate;
}

.hero-bg {
  position: absolute;
  inset: 0;
  z-index: -1;
  background:
    radial-gradient(900px 500px at 75% 20%, rgba(0, 229, 255, 0.12), transparent 60%),
    radial-gradient(700px 420px at 10% 80%, rgba(255, 109, 58, 0.1), transparent 55%),
    linear-gradient(#070a10, #0c121c);
}

.hero-bg::after {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(37, 42, 54, 0.55) 1px, transparent 1px),
    linear-gradient(90deg, rgba(37, 42, 54, 0.55) 1px, transparent 1px);
  background-size: 48px 48px;
  mask-image: radial-gradient(ellipse at center, black 35%, transparent 78%);
}

#particles {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  z-index: -1;
}

.hero-grid {
  display: grid;
  grid-template-columns: 1.15fr 0.85fr;
  gap: 48px;
  align-items: center;
  padding: 72px 0 88px;
}

.kicker {
  color: var(--cyan);
  font-size: 13px;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  margin-bottom: 16px;
}

h1 {
  font-size: clamp(40px, 6vw, 72px);
  line-height: 1.05;
  letter-spacing: 0.02em;
}

h1 span { color: var(--cyan); }

.lede {
  margin-top: 20px;
  color: var(--muted);
  font-size: 18px;
  max-width: 560px;
}

.hero-actions {
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
  margin-top: 32px;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  min-height: 48px;
  padding: 0 22px;
  border-radius: 10px;
  font-weight: 700;
  border: 1px solid transparent;
  transition: 0.18s ease;
}

.btn-primary { background: var(--cyan); color: #041016; }
.btn-primary:hover { transform: translateY(-1px); box-shadow: 0 10px 30px rgba(0, 229, 255, 0.18); }
.btn-ghost { border-color: var(--border); background: rgba(26, 31, 46, 0.7); }
.btn-ghost:hover { border-color: var(--cyan); color: var(--cyan); }

.stats {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 12px;
  margin-top: 42px;
}

.stat {
  padding: 16px 14px;
  background: rgba(19, 24, 32, 0.8);
  border: 1px solid var(--border);
  border-radius: 12px;
}

.stat b {
  display: block;
  font-size: 26px;
  color: var(--cyan);
  font-variant-numeric: tabular-nums;
}

.stat span { color: var(--muted); font-size: 12px; }

.hero-card {
  background: linear-gradient(180deg, rgba(26, 31, 46, 0.92), rgba(19, 24, 32, 0.92));
  border: 1px solid var(--border);
  border-radius: 24px;
  padding: 28px;
  box-shadow: 0 30px 80px rgba(0, 0, 0, 0.35);
}

.hero-card img {
  width: 96px;
  height: 96px;
  margin: 0 auto 16px;
  border-radius: 24px;
}

.hero-card h3 { text-align: center; margin-bottom: 8px; }
.hero-card p { color: var(--muted); text-align: center; font-size: 14px; }

.feature-list {
  margin-top: 22px;
  display: grid;
  gap: 10px;
}

.feature-list li {
  list-style: none;
  display: flex;
  gap: 10px;
  align-items: center;
  font-size: 14px;
  color: var(--muted);
}

.dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--cyan);
  box-shadow: 0 0 10px var(--cyan);
}

/* Sections */
section { padding: 84px 0; }

.section-head {
  margin-bottom: 36px;
}

.section-head h2 {
  font-size: 32px;
  margin-top: 8px;
}

.cards {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: 14px;
}

.world {
  padding: 20px 16px;
  border-radius: 16px;
  background: var(--card);
  border: 1px solid var(--border);
  min-height: 180px;
}

.world .num { font-size: 12px; letter-spacing: 0.14em; color: var(--muted); }
.world h3 { margin: 10px 0 8px; font-size: 18px; }
.world p { color: var(--muted); font-size: 13px; }

.towers {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 12px;
}

.tower {
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 14px;
  padding: 16px;
}

.tower .icon { font-size: 28px; margin-bottom: 8px; }
.tower h3 { font-size: 16px; }
.tower p { color: var(--muted); font-size: 13px; margin-top: 6px; }

.features {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 14px;
}

.feature {
  padding: 22px;
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 16px;
}

.feature h3 { margin: 8px 0; }
.feature p { color: var(--muted); font-size: 14px; }

.download {
  background:
    radial-gradient(600px 240px at 50% 0%, rgba(0, 229, 255, 0.12), transparent),
    var(--bg-2);
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
}

.download-box {
  display: grid;
  grid-template-columns: 1.2fr 0.8fr;
  gap: 28px;
  align-items: center;
}

.download-actions { display: flex; flex-direction: column; gap: 10px; }

.dl {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 14px 16px;
  border: 1px solid var(--border);
  border-radius: 12px;
  background: var(--panel);
}

.dl small { color: var(--muted); }

footer {
  padding: 28px 0 40px;
  color: var(--muted);
  font-size: 13px;
}

.footer-inner {
  display: flex;
  justify-content: space-between;
  gap: 12px;
  flex-wrap: wrap;
}

@media (max-width: 960px) {
  .hero-grid, .download-box { grid-template-columns: 1fr; }
  .cards { grid-template-columns: 1fr 1fr; }
  .towers, .features { grid-template-columns: 1fr 1fr; }
  .nav-links { display: none; }
  .menu-btn { display: block; }
  .nav.open .nav-links {
    display: flex;
    position: absolute;
    left: 0; right: 0; top: 68px;
    flex-direction: column;
    padding: 16px 20px 20px;
    background: #0b1018;
    border-bottom: 1px solid var(--border);
  }
}

@media (max-width: 640px) {
  .stats, .cards, .towers, .features { grid-template-columns: 1fr 1fr; }
  .stats { grid-template-columns: 1fr 1fr; }
}