:root {
  color: #1a1a1a;
  font-family: Inter, "PingFang SC", "Microsoft YaHei", sans-serif;
  background: #fff7fa;
}

* { box-sizing: border-box; }

html, body { min-height: 100%; margin: 0; }

body {
  min-width: 320px;
  background:
    radial-gradient(circle at 50% 18%, rgba(255, 79, 147, .16), transparent 34%),
    linear-gradient(180deg, #fff 0%, #fff7fa 100%);
}

.download-shell {
  display: grid;
  min-height: 100svh;
  padding: 32px 20px;
  place-items: center;
}

.download-card {
  width: min(100%, 400px);
  padding: 42px 28px 32px;
  text-align: center;
  background: rgba(255, 255, 255, .92);
  border: 1px solid rgba(255, 79, 147, .14);
  border-radius: 28px;
  box-shadow: 0 24px 70px rgba(95, 35, 59, .12);
  animation: card-in 550ms cubic-bezier(.22, 1, .36, 1) both;
}

.app-icon {
  display: block;
  width: 88px;
  height: 88px;
  margin: 0 auto 18px;
  border-radius: 22px;
  box-shadow: 0 12px 30px rgba(255, 47, 128, .28);
}

.brand {
  margin: 0 0 28px;
  color: #ff4f93;
  font-size: 13px;
  font-weight: 900;
  letter-spacing: 6px;
}

h1 {
  margin: 0 0 12px;
  font-size: 26px;
  line-height: 1.3;
}

.download-message {
  min-height: 48px;
  margin: 0 0 24px;
  color: #777;
  font-size: 14px;
  line-height: 1.7;
}

.primary-action {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 100%;
  min-height: 50px;
  padding: 0 20px;
  color: #fff;
  font: inherit;
  font-size: 15px;
  font-weight: 700;
  text-decoration: none;
  background: #ff4f93;
  border: 0;
  border-radius: 12px;
  transition: transform 180ms ease, filter 180ms ease;
}

.primary-action:hover, .primary-action:focus-visible { filter: brightness(.97); transform: translateY(-2px); }
.primary-action:active { transform: none; }
.primary-action:disabled { color: #999; cursor: not-allowed; background: #eee; }
.primary-action--dark { background: #1a1a1a; }

.platform-actions { display: grid; gap: 12px; }

.wechat-guide {
  padding: 20px;
  color: #555;
  background: #fff0f6;
  border: 1px solid #ffd0e6;
  border-radius: 16px;
}

.wechat-guide > span { display: block; margin-bottom: 14px; color: #ff4f93; font-size: 24px; font-weight: 900; letter-spacing: 4px; }
.wechat-guide strong { color: #1a1a1a; font-size: 17px; }
.wechat-guide p { margin: 10px 0 0; font-size: 13px; line-height: 1.7; }

.download-hint {
  margin: 16px 0 0;
  color: #999;
  font-size: 12px;
  line-height: 1.6;
}

.home-link {
  display: inline-block;
  margin-top: 28px;
  color: #888;
  font-size: 12px;
  text-underline-offset: 3px;
}

[hidden] { display: none !important; }
noscript { display: block; padding: 20px; text-align: center; }

@keyframes card-in {
  from { opacity: 0; transform: translateY(18px) scale(.98); }
  to { opacity: 1; transform: none; }
}

@media (prefers-reduced-motion: reduce) {
  .download-card { animation: none; }
  .primary-action { transition: none; }
}