:root {
  --bg: #0b0c10;
  --bg-elev: #13151c;
  --gold: #d4b26a;
  --gold-soft: rgba(212, 178, 106, 0.18);
  --ink: #f4efe6;
  --muted: #9a9388;
  --line: rgba(255, 255, 255, 0.08);
  --wechat: #07c160;
  --radius: 22px;
}

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

html,
body {
  min-height: 100%;
}

body {
  font-family: "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  background:
    radial-gradient(1200px 600px at 80% -10%, rgba(212, 178, 106, 0.16), transparent 55%),
    radial-gradient(900px 500px at 10% 100%, rgba(7, 193, 96, 0.08), transparent 50%),
    var(--bg);
  color: var(--ink);
  line-height: 1.6;
}

.age-bar {
  text-align: center;
  font-size: 12px;
  letter-spacing: 0.18em;
  padding: 10px 16px;
  color: #c8b89a;
  background: rgba(0, 0, 0, 0.45);
  border-bottom: 1px solid var(--line);
}

.wrap {
  width: min(1080px, calc(100% - 32px));
  margin: 0 auto;
  padding: 28px 0 72px;
}

.nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 36px;
}

.brand {
  display: flex;
  align-items: center;
  gap: 10px;
  font-weight: 700;
  letter-spacing: 0.28em;
  font-size: 14px;
}

.mark {
  width: 28px;
  height: 28px;
  border: 1px solid var(--gold);
  border-radius: 50%;
  display: grid;
  place-items: center;
}

.mark span {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--gold);
  box-shadow: 0 0 12px var(--gold);
}

.hero {
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  gap: 28px;
  align-items: center;
}

.kicker {
  color: var(--gold);
  font-size: 13px;
  letter-spacing: 0.32em;
  text-transform: uppercase;
  margin-bottom: 14px;
}

h1 {
  font-size: clamp(36px, 6vw, 64px);
  line-height: 1.08;
  font-weight: 620;
  letter-spacing: 0.04em;
}

h1 em {
  font-style: normal;
  color: var(--gold);
}

.lead {
  margin-top: 18px;
  color: var(--muted);
  font-size: 16px;
  max-width: 42ch;
}

.cta-row {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 28px;
}

.btn {
  border: 0;
  cursor: pointer;
  border-radius: 999px;
  padding: 12px 22px;
  font-size: 14px;
  font-weight: 600;
  text-decoration: none;
  display: inline-flex;
  align-items: center;
  gap: 8px;
}

.btn-gold {
  background: linear-gradient(180deg, #ead7a4, var(--gold));
  color: #1a1408;
}

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

.device {
  position: relative;
  min-height: 460px;
  display: grid;
  place-items: center;
}

.device::before {
  content: "";
  position: absolute;
  width: 260px;
  height: 260px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(212, 178, 106, 0.28), transparent 68%);
  filter: blur(8px);
}

.device-photo {
  position: relative;
  z-index: 1;
  width: min(100%, 380px);
  height: auto;
  display: block;
  filter: drop-shadow(0 24px 40px rgba(0, 0, 0, 0.45));
  animation: float 6s ease-in-out infinite;
}

.card {
  margin-top: 48px;
  display: grid;
  grid-template-columns: 320px 1fr;
  gap: 0;
  background: rgba(19, 21, 28, 0.88);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  overflow: hidden;
  backdrop-filter: blur(16px);
}

.qr-pane {
  padding: 28px 24px 32px;
  text-align: center;
  background: linear-gradient(180deg, rgba(212, 178, 106, 0.08), transparent 40%);
  border-right: 1px solid var(--line);
}

.qr-frame {
  width: 220px;
  height: 220px;
  margin: 12px auto 16px;
  padding: 12px;
  background: #fff;
  border-radius: 18px;
  box-shadow: 0 16px 40px rgba(0, 0, 0, 0.28);
}

.qr-frame img {
  width: 100%;
  height: 100%;
  object-fit: contain;
  display: block;
}

.wechat-id {
  font-size: 15px;
  color: var(--gold);
  letter-spacing: 0.08em;
}

.hint {
  margin-top: 8px;
  font-size: 13px;
  color: var(--muted);
}

.info {
  padding: 32px 36px;
}

.info h2 {
  font-size: 24px;
  font-weight: 620;
}

.steps {
  margin-top: 20px;
  display: grid;
  gap: 12px;
}

.step {
  display: grid;
  grid-template-columns: 36px 1fr;
  gap: 12px;
  align-items: start;
}

.num {
  width: 36px;
  height: 36px;
  border-radius: 50%;
  display: grid;
  place-items: center;
  background: var(--gold-soft);
  color: var(--gold);
  font-weight: 700;
}

.features {
  margin-top: 28px;
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 12px;
}

.feature {
  padding: 14px;
  border: 1px solid var(--line);
  border-radius: 14px;
  background: rgba(255, 255, 255, 0.02);
}

.feature strong {
  display: block;
  font-size: 14px;
  margin-bottom: 4px;
}

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

.toast {
  position: fixed;
  left: 50%;
  bottom: 24px;
  transform: translateX(-50%) translateY(20px);
  opacity: 0;
  pointer-events: none;
  background: #fff;
  color: #111;
  padding: 10px 16px;
  border-radius: 999px;
  font-size: 13px;
  font-weight: 600;
  transition: 0.25s ease;
  z-index: 20;
}

.toast.show {
  opacity: 1;
  transform: translateX(-50%) translateY(0);
}

footer {
  margin-top: 40px;
  color: #6f6a62;
  font-size: 12px;
  text-align: center;
}

@keyframes float {
  0%,
  100% { transform: translateY(0); }
  50% { transform: translateY(-10px); }
}

@media (max-width: 860px) {
  .hero,
  .card,
  .features {
    grid-template-columns: 1fr;
  }

  .qr-pane {
    border-right: 0;
    border-bottom: 1px solid var(--line);
  }

  .info {
    padding: 24px 20px 28px;
  }

  .device {
    min-height: 0;
    order: -1;
  }

  .device-photo {
    width: min(100%, 280px);
  }
}