.qingtang-download-overlay {
  position: fixed;
  inset: 0;
  z-index: 999;
  display: flex;
  align-items: flex-start;
  justify-content: center;
  padding: 92px 16px 24px;
  background: rgba(239, 248, 240, 0.55);
  backdrop-filter: blur(2px);
}

.qingtang-download-overlay[hidden] { display: none; }
.qingtang-download-backdrop { position: absolute; inset: 0; border: 0; background: transparent; cursor: default; }
.qingtang-download-dialog {
  position: relative;
  width: min(760px, 100%);
  max-height: calc(100vh - 124px);
  overflow-y: auto;
  padding: 32px 56px 40px;
  border-radius: 28px;
  background: rgba(237, 249, 238, 0.8);
  box-shadow: 0 28px 90px rgba(38, 111, 62, 0.18);
  box-sizing: border-box;
}

.qingtang-download-close {
  position: absolute;
  top: 20px;
  right: 20px;
  width: 36px;
  height: 36px;
  border: 0;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.7);
  color: #333;
  font-size: 22px;
  line-height: 1;
  cursor: pointer;
}

.qingtang-download-dialog h2 { margin: 0; color: #242424; font-size: 30px; line-height: 36px; text-align: center; }
.qingtang-download-grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 28px; margin-top: 32px; }
.qingtang-download-card { padding: 28px 28px 24px; border-radius: 18px; background: rgba(255, 255, 255, 0.88); text-align: center; box-shadow: 0 20px 42px rgba(36, 96, 52, 0.1); }
.qingtang-download-card img { display: block; width: 180px; height: 180px; margin: 0 auto; object-fit: contain; }
.qingtang-download-card p { margin: 20px 0 0; color: #2b2b2b; font-size: 28px; font-weight: 600; line-height: 1; }

@media (max-width: 640px) {
  .qingtang-download-overlay { align-items: center; padding: 24px 16px; }
  .qingtang-download-dialog { max-height: calc(100vh - 48px); padding: 28px 20px 24px; border-radius: 20px; }
  .qingtang-download-dialog h2 { font-size: 22px; line-height: 30px; }
  .qingtang-download-grid { grid-template-columns: 1fr; gap: 16px; margin-top: 24px; }
  .qingtang-download-card { padding: 20px 16px; }
  .qingtang-download-card img { width: 148px; height: 148px; }
  .qingtang-download-card p { margin-top: 16px; font-size: 23px; }
}