body {
  background-color: var(--background-color) !important;
  color: var(--text-color);
}

.content-card {
  background-color: #252526;  /* VS Code Dark+ 次级背景 */
  color: var(--text-color);
  border: 1px solid #333;
}

.intro-text p {
  margin-bottom: 1.25rem;
  letter-spacing: 1px;
  opacity: 0.95;
}

.steam-btn {
  max-width: 400px;
  background: linear-gradient(135deg, #8b0000, #b22222);
  border: 1px solid #aa3333;
}
.steam-btn:hover {
  background: linear-gradient(135deg, #b22222, #dc3545);
  box-shadow: 0 0 15px rgba(220,53,69,0.6);
}

.paypal-btn {
  max-width: 400px;
  background: linear-gradient(135deg, #003087, #005ea6);
  border: 1px solid #0a4fb3;
}

.paypal-btn:hover {
  background: linear-gradient(135deg, #005ea6, #009cde);
  box-shadow: 0 0 15px rgba(0, 156, 222, 0.6);
}

.guide-btn {
  color: #ddd !important;
  background-color: transparent !important;
  border: 1px solid #888 !important;
}

.guide-btn:hover {
  color: #fff;
  border-color: #d4af37;
  box-shadow: 0 0 12px rgba(212,175,55,0.6);
}