:root {
  --bg: #0b1020;
  --bg-soft: #121a2f;
  --card: rgba(255, 255, 255, 0.04);
  --card-border: rgba(255, 255, 255, 0.1);
  --text: #eef2ff;
  --muted: #a7b0c8;
  --accent: #6ea8ff;
  --accent-2: #8b7bff;
  --radius: 18px;
  --shadow: 0 20px 50px rgba(0, 0, 0, 0.35);
  --max: 960px;
  font-family: "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei",
    system-ui, -apple-system, sans-serif;
}

* { box-sizing: border-box; }
html, body { margin: 0; padding: 0; }
body {
  min-height: 100vh;
  color: var(--text);
  background: var(--bg);
  line-height: 1.6;
}

.bg {
  position: fixed;
  inset: 0;
  z-index: -1;
  background:
    radial-gradient(900px 500px at 10% -10%, rgba(110, 168, 255, 0.28), transparent 60%),
    radial-gradient(700px 420px at 95% 5%, rgba(139, 123, 255, 0.22), transparent 55%),
    radial-gradient(600px 400px at 50% 110%, rgba(80, 200, 180, 0.12), transparent 50%),
    var(--bg);
}

.site-header,
main,
.site-footer {
  width: min(100% - 2rem, var(--max));
  margin-inline: auto;
}

.site-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding: 1.5rem 0 0.5rem;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 0.65rem;
  font-weight: 700;
  letter-spacing: 0.02em;
}

.brand-mark {
  width: 0.85rem;
  height: 0.85rem;
  border-radius: 999px;
  background: linear-gradient(135deg, var(--accent), var(--accent-2));
  box-shadow: 0 0 18px rgba(110, 168, 255, 0.7);
}

.tagline {
  margin: 0;
  color: var(--muted);
  font-size: 0.95rem;
}

.hero {
  padding: 2.5rem 0 1.5rem;
}

.hero h1 {
  margin: 0 0 0.75rem;
  font-size: clamp(1.8rem, 4vw, 2.6rem);
  line-height: 1.2;
  letter-spacing: -0.02em;
}

.lead {
  margin: 0;
  max-width: 42rem;
  color: var(--muted);
  font-size: 1.05rem;
}

.products {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1.25rem;
  padding-bottom: 3rem;
}

@media (min-width: 760px) {
  .products {
    grid-template-columns: 1fr 1fr;
  }
}

.card {
  background: var(--card);
  border: 1px solid var(--card-border);
  border-radius: var(--radius);
  overflow: hidden;
  box-shadow: var(--shadow);
  backdrop-filter: blur(10px);
}

.video-slot {
  aspect-ratio: 16 / 9;
  background:
    linear-gradient(180deg, rgba(255,255,255,0.04), transparent),
    repeating-linear-gradient(
      -45deg,
      rgba(255,255,255,0.03) 0 8px,
      transparent 8px 16px
    ),
    var(--bg-soft);
  border-bottom: 1px solid var(--card-border);
}

.video-placeholder {
  height: 100%;
  display: grid;
  place-content: center;
  justify-items: center;
  gap: 0.45rem;
  color: var(--muted);
  text-align: center;
  padding: 1rem;
}

.play-icon {
  width: 3rem;
  height: 3rem;
  border-radius: 999px;
  display: grid;
  place-items: center;
  margin-bottom: 0.35rem;
  background: rgba(255, 255, 255, 0.08);
  border: 1px solid rgba(255, 255, 255, 0.14);
  color: var(--text);
  font-size: 0.95rem;
  padding-left: 0.15rem;
}

.status {
  color: var(--text);
  font-weight: 600;
  font-size: 1.05rem;
}

.hint {
  font-size: 0.85rem;
  opacity: 0.85;
}

.card-body {
  padding: 1.15rem 1.25rem 1.35rem;
}

.card-body h2 {
  margin: 0 0 0.4rem;
  font-size: 1.2rem;
}

.card-body p {
  margin: 0;
  color: var(--muted);
  font-size: 0.95rem;
}

.site-footer {
  padding: 0 0 2.5rem;
  color: var(--muted);
  font-size: 0.85rem;
}

.site-footer p { margin: 0; }