:root {
  --bg: #0b0c10;
  --panel: #121318;
  --text: #e9eef3;
  --muted: #b7c0c7;
  --brand: #4f8cff;
  --brand-2: #8aa9ff;
  --border: #22252e;
}

* { box-sizing: border-box; }
html, body { height: 100%; }
body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, "Noto Sans", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  background: radial-gradient(1200px 600px at 70% -10%, rgba(79,140,255,0.12), transparent) var(--bg);
  color: var(--text);
  line-height: 1.65;
}

.container {
  width: min(1120px, 92%);
  margin: 0 auto;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 10;
  backdrop-filter: saturate(120%) blur(8px);
  background: color-mix(in srgb, var(--bg) 85%, transparent);
  border-bottom: 1px solid var(--border);
}
.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 14px 0;
}
.brand {
  font-size: 20px;
  color: var(--text);
  text-decoration: none;
  font-weight: 700;
}
.nav-toggle {
  display: none;
  background: transparent;
  border: 1px solid var(--border);
  color: var(--text);
  padding: 6px 10px;
  border-radius: 8px;
}
.site-nav a {
  color: var(--muted);
  text-decoration: none;
  margin-left: 18px;
  padding: 8px 10px;
  border-radius: 8px;
}
.site-nav a.active, .site-nav a:hover {
  color: var(--text);
  background: #161922;
}

.hero {
  padding: 56px 0 18px 0;
}
.hero h1 {
  font-size: clamp(28px, 4.5vw, 44px);
  line-height: 1.2;
  margin: 0 0 8px 0;
}
.subtitle { color: var(--muted); margin: 0 0 20px 0; }
.cta { margin: 20px 0 28px 0; }

.appstore-button {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  color: #fff;
  text-decoration: none;
  background: linear-gradient(180deg, #2a2a2a, #0f0f10);
  border: 1px solid #2e2f33;
  border-radius: 12px;
  padding: 10px 14px;
  box-shadow: inset 0 1px 0 rgba(255,255,255,0.06), 0 6px 20px rgba(0,0,0,0.3);
}
.appstore-button small { display: block; font-size: 11px; color: #cfd6de; }
.appstore-button strong { font-size: 16px; }
.apple-logo { font-family: system-ui, -apple-system; font-weight: 600; font-size: 22px; }

.feature-list { display: grid; gap: 8px; padding-left: 18px; }
.feature-list li { color: var(--muted); }

.gallery { padding: 16px 0 42px; }
.gallery h2 { margin-bottom: 14px; }
.grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 12px;
}
.grid figure {
  margin: 0;
  overflow: hidden;
  border-radius: 12px;
  border: 1px solid var(--border);
  background: var(--panel);
}
.grid img { width: 100%; height: auto; display: block; }

.faq-teaser { padding-bottom: 48px; }
.qa-list { list-style: none; padding: 0; margin: 0; display: grid; gap: 14px; }
.qa-list li { background: var(--panel); border: 1px solid var(--border); border-radius: 12px; padding: 14px 16px; }
.qa-list .more { color: var(--brand); text-decoration: none; }

.page { padding: 36px 0 48px; }
.page h1 { margin-top: 6px; }
.qa details { background: var(--panel); border: 1px solid var(--border); border-radius: 12px; padding: 12px 14px; margin: 10px 0; }
.qa summary { cursor: pointer; font-weight: 600; }
.button {
  display: inline-block;
  background: var(--brand);
  color: #fff;
  text-decoration: none;
  padding: 10px 14px;
  border-radius: 10px;
}

.site-footer { border-top: 1px solid var(--border); padding: 18px 0; }
.footer-inner { display: flex; align-items: center; justify-content: space-between; gap: 16px; }
.footer-nav a { color: var(--muted); text-decoration: none; margin-left: 16px; }
.footer-nav a:hover { color: var(--text); }

@media (max-width: 760px) {
  .nav-toggle { display: inline-block; }
  .site-nav { display: none; position: absolute; right: 4%; top: 54px; background: var(--panel); border: 1px solid var(--border); border-radius: 12px; padding: 10px; }
  .site-nav.open { display: block; }
  .site-nav a { display: block; margin: 4px 0; }
  .grid { grid-template-columns: 1fr; }
  .footer-inner { flex-direction: column; align-items: flex-start; }
}