:root {
  --bg: #07101c;
  --panel: #102033;
  --line: rgba(120, 190, 255, 0.12);
  --text: #e8f3ff;
  --muted: #8aa4c2;
  --accent: #2ee6c5;
  --accent-2: #4d8dff;
  --shadow: 0 18px 50px rgba(0, 0, 0, 0.35);
  color-scheme: dark;
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: "Segoe UI", "PingFang SC", "Microsoft YaHei", sans-serif;
}

a { color: inherit; text-decoration: none; }

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

.nav {
  position: sticky;
  top: 0;
  z-index: 20;
  backdrop-filter: blur(16px);
  background: rgba(7, 16, 28, 0.82);
  border-bottom: 1px solid var(--line);
}

.nav-inner {
  display: flex;
  align-items: center;
  gap: 28px;
  min-height: 64px;
}

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

.brand svg { width: 36px; height: 36px; }

.nav-links {
  display: flex;
  gap: 18px;
  margin-left: auto;
  color: var(--muted);
  font-size: 14px;
}

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

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border: 0;
  border-radius: 10px;
  padding: 10px 16px;
  font-weight: 700;
  background: var(--accent);
  color: #04231c;
  cursor: pointer;
}

.btn.ghost {
  background: transparent;
  color: var(--text);
  border: 1px solid var(--line);
}

.btn[hidden], .btn:disabled {
  opacity: 0.45;
  pointer-events: none;
}

.hero {
  position: relative;
  overflow: hidden;
  padding: 72px 0 64px;
  background:
    radial-gradient(circle at 18% 12%, rgba(46, 230, 197, 0.22), transparent 34%),
    radial-gradient(circle at 88% 78%, rgba(77, 141, 255, 0.22), transparent 38%),
    linear-gradient(165deg, #0a2a3d 0%, #07101c 48%, #040d16 100%);
}

.hero h1 {
  margin: 0 0 12px;
  font-size: clamp(40px, 7vw, 72px);
  letter-spacing: 0.08em;
}

.hero .sub {
  margin: 0 0 16px;
  font-size: 22px;
  color: var(--accent);
  font-weight: 650;
}

.hero p {
  max-width: 640px;
  color: var(--muted);
  line-height: 1.7;
  font-size: 16px;
}

.hero-actions { display: flex; gap: 12px; margin-top: 28px; flex-wrap: wrap; }

section { padding: 64px 0; }

h2 {
  margin: 0 0 8px;
  font-size: 28px;
}

.lead {
  margin: 0 0 28px;
  color: var(--muted);
}

.grid {
  display: grid;
  gap: 14px;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
}

.card {
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: 16px;
  padding: 18px;
  box-shadow: var(--shadow);
}

.card b { display: block; margin-bottom: 8px; font-size: 16px; }
.card p { margin: 0; color: var(--muted); line-height: 1.55; font-size: 14px; }

.tone {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  display: inline-block;
  margin-right: 8px;
}

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

.plan b { font-size: 28px; }
.plan .unit { font-size: 14px; color: var(--muted); font-weight: 500; }
.plan .chars { margin-top: 10px; color: var(--accent); }

.download { padding-top: 56px; }

.dl-card {
  background: var(--panel);
  border: 1px solid var(--line);
  color: var(--text);
  border-radius: 16px;
  padding: 20px;
  display: flex;
  align-items: center;
  gap: 16px;
}

.dl-card b {
  color: var(--text);
  margin: 0;
  font-size: 15px;
}

.dl-main {
  margin: 0 0 14px;
  padding: 22px 24px;
  background: linear-gradient(180deg, rgba(46, 230, 197, 0.1), rgba(16, 32, 51, 0.9));
  border-color: rgba(46, 230, 197, 0.28);
}

.dl-copy {
  flex: 1;
  min-width: 0;
}

.dl-copy span {
  display: block;
  color: var(--accent);
  font-size: 12px;
  margin-bottom: 4px;
}

.dl-main .btn { min-width: 148px; }

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

.dl-row .dl-card {
  flex-direction: column;
  align-items: flex-start;
}

.win-ico {
  width: 48px;
  height: 48px;
  flex: 0 0 48px;
}

.win-ico.sm { width: 36px; height: 36px; flex-basis: 36px; }

.dl-btn.wait {
  background: transparent;
  color: var(--muted);
  border: 1px solid var(--line);
  pointer-events: none;
}

.dock {
  position: fixed;
  right: 0;
  top: 42%;
  z-index: 30;
  display: flex;
  flex-direction: column;
  gap: 1px;
}

.dock a {
  writing-mode: vertical-rl;
  background: #12324a;
  border: 1px solid var(--line);
  padding: 14px 8px;
  font-size: 12px;
  letter-spacing: 0.12em;
}

.dock a:hover { background: #1a4664; color: var(--accent); }

@media (max-width: 900px) {
  .dl-row { grid-template-columns: 1fr; }
  .dock { display: none; }
}

footer {
  border-top: 1px solid var(--line);
  padding: 28px 0 40px;
  color: var(--muted);
  display: flex;
  justify-content: space-between;
  gap: 12px;
  flex-wrap: wrap;
  font-size: 13px;
}

@media (max-width: 720px) {
  .nav-links { display: none; }
  .hero { padding: 48px 0; }
}