/* ========================================
   Card Lock Overlay (全卡片遮盖锁)
   ======================================== */
.card-lock-overlay {
  position: absolute;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 10;
  border-radius: var(--radius);
  overflow: hidden;
}
.lock-overlay-bg {
  position: absolute;
  inset: 0;
  background: var(--surface);
  opacity: 0.85;
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
}
.lock-content {
  position: relative;
  z-index: 1;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 8px;
  padding: 32px 24px;
  text-align: center;
}
.lock-icon {
  font-size: 36px;
  opacity: 0.8;
}
.lock-title {
  font-size: 16px;
  font-weight: 700;
  color: var(--text);
}
.lock-desc {
  font-size: 13px;
  color: var(--text-muted);
  line-height: 1.5;
}
.lock-desc strong {
  color: var(--accent-mid);
}
.lock-content .btn {
  margin-top: 4px;
}