.answer-board div.is-locked {
  position: relative; overflow: hidden;
}
.answer-board div.is-locked span {
  color: #b9c8d8; filter: blur(.2px);
}
.answer-board div.is-locked::after {
  content: "等双方都写完"; position: absolute; right: 10px; bottom: 10px;
  padding: 5px 8px; border-radius: 999px; color: #102033;
  background: linear-gradient(180deg, #fff, #eaf7ff); font-family: var(--font-cute); font-size: 11px;
}
.sync-unlock-card {
  margin-top: 12px; padding: 13px; border: 1px solid rgba(99,230,184,.24);
  border-radius: 8px; background:
    radial-gradient(circle at 92% 0, rgba(99,230,184,.16), transparent 32%),
    rgba(255,255,255,.06);
}
.sync-unlock-card b {
  display: block; margin: 4px 0; color: #fff; font-family: var(--font-cute);
  font-size: 20px; font-weight: 400; line-height: 1.15;
}
.sync-unlock-card p {
  color: #d8e8f7; font-family: var(--font-soft); font-size: 13px; line-height: 1.55;
}
.sync-unlock-card button {
  margin-top: 10px; min-height: 36px; border-radius: 999px; padding: 0 13px;
  color: #102033; background: linear-gradient(180deg, #fff7df, #e6fbff);
  font-family: var(--font-cute); font-weight: 400;
}
.sync-unlock-card button:disabled {
  opacity: .45; cursor: not-allowed; filter: grayscale(.25);
}
.sync-unlock-card.is-open {
  border-color: rgba(255,176,95,.42);
  background:
    radial-gradient(circle at 15% 0, rgba(255,176,95,.16), transparent 34%),
    radial-gradient(circle at 92% 0, rgba(255,78,120,.14), transparent 28%),
    rgba(255,255,255,.07);
}
.sync-favorites {
  margin-top: 12px; padding: 12px; border: 1px solid rgba(255,255,255,.12);
  border-radius: 8px; background: rgba(6,13,25,.38);
}
.sync-favorite-list {
  display: grid; gap: 8px;
}
.sync-favorite-empty, .sync-favorite-item {
  padding: 10px; border-radius: 8px; background: rgba(255,255,255,.06);
}
.sync-favorite-empty {
  color: #b9c8d8; font-family: var(--font-soft); font-size: 13px; line-height: 1.55;
}
.sync-favorite-item b {
  display: block; color: var(--mint); font-family: var(--font-cute); font-size: 15px; font-weight: 400;
}
.sync-favorite-item span {
  display: block; margin-top: 3px; color: #d8e8f7; font-family: var(--font-soft);
  font-size: 12px; line-height: 1.45;
}