/* ---- 分享弹层（全站组件） ---- */
.share-sheet {
  position: fixed;
  inset: 0;
  z-index: 1150;
  display: flex;
  align-items: flex-end;
  justify-content: center;
  box-sizing: border-box;
}
.share-sheet[hidden] { display: none !important; }
.share-sheet__backdrop {
  position: absolute;
  inset: 0;
  background: rgba(15, 18, 20, 0.52);
  backdrop-filter: blur(3px);
}
.share-sheet__panel {
  position: relative;
  z-index: 1;
  width: 100%;
  max-width: 480px;
  max-height: min(88dvh, 520px);
  padding: 0 16px calc(16px + env(safe-area-inset-bottom, 0px));
  background: #fff;
  border-radius: var(--radius-lg) var(--radius-lg) 0 0;
  box-shadow: 0 -8px 32px rgba(0, 0, 0, 0.12);
  animation: share-sheet-in 0.28s ease-out;
  overflow: auto;
}
.share-sheet__head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  padding: 14px 0 10px;
  border-bottom: 1px solid var(--border);
}
.share-sheet__title {
  margin: 0;
  font-size: 16px;
  font-weight: 600;
  color: var(--text);
}
.share-sheet__close {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  margin: -6px -8px -6px 0;
  padding: 0;
  border: 0;
  border-radius: var(--radius-sm);
  background: transparent;
  color: var(--muted);
  cursor: pointer;
  transition: color var(--dur) var(--ease), background var(--dur) var(--ease);
}
.share-sheet__close:hover {
  color: var(--text);
  background: var(--surface2);
}
.share-sheet__preview {
  margin: 12px 0 0;
  font-size: 14px;
  line-height: 1.5;
  color: var(--text2);
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}
.share-sheet__copy {
  margin-top: 14px;
}
.share-sheet__copy-label {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}
.share-sheet__copy-row {
  display: flex;
  align-items: stretch;
  gap: 8px;
}
.share-sheet__input {
  flex: 1;
  min-width: 0;
  height: 40px;
  padding: 0 12px;
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  background: var(--surface2);
  color: var(--text2);
  font-size: 13px;
}
.share-sheet__copy-btn {
  flex: 0 0 auto;
  min-width: 72px;
  height: 40px;
  padding: 0 16px;
  border: 0;
  border-radius: var(--radius-sm);
  background: var(--pink);
  color: #fff;
  font-size: 14px;
  font-weight: 600;
  cursor: pointer;
  transition: background var(--dur) var(--ease), transform 0.12s ease;
}
.share-sheet__copy-btn:hover { background: var(--pink-hover, #ff85a1); }
.share-sheet__copy-btn:active { transform: scale(0.97); }
.share-sheet__grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 8px 4px;
  margin-top: 18px;
  padding-bottom: 4px;
}
.share-channel {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 8px;
  min-height: 88px;
  padding: 8px 4px;
  border: 0;
  border-radius: var(--radius-sm);
  background: transparent;
  color: var(--text2);
  cursor: pointer;
  transition: background var(--dur) var(--ease);
}
.share-channel:hover { background: var(--surface2); }
.share-channel__icon {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 48px;
  height: 48px;
  border-radius: 50%;
  background: var(--surface2);
  border: 1px solid var(--border);
  color: var(--text2);
  transition: transform var(--dur) var(--ease), border-color var(--dur) var(--ease);
}
.share-channel__glyph {
  width: 22px;
  height: 22px;
  font-size: 22px;
}
.share-channel__icon--wechat {
  background: #edf9f1;
  border-color: #d4f0df;
  color: #07c160;
}
.share-channel__icon--weibo {
  background: #fff4eb;
  border-color: #ffe4cc;
  color: #ff8200;
}
.share-channel__icon--qq {
  background: #ebf7fe;
  border-color: #ccecfb;
  color: #12b7f5;
}
.share-channel__icon--link {
  background: var(--surface2);
  border-color: var(--border);
  color: var(--text2);
}
.share-channel:hover .share-channel__icon {
  transform: scale(1.04);
}
.share-channel__label {
  font-size: 12px;
  line-height: 1.2;
  text-align: center;
}
body.has-share-sheet { overflow: hidden; }
.share-trigger:focus-visible,
.share-channel:focus-visible,
.share-sheet__copy-btn:focus-visible,
.share-sheet__close:focus-visible {
  outline: 2px solid var(--ring);
  outline-offset: 2px;
}
@keyframes share-sheet-in {
  from { opacity: 0; transform: translateY(100%); }
  to { opacity: 1; transform: translateY(0); }
}
@media (min-width: 641px) {
  .share-sheet {
    align-items: center;
    padding: 24px;
  }
  .share-sheet__panel {
    max-width: 420px;
    padding: 0 20px 20px;
    border-radius: var(--radius-lg);
    animation: share-sheet-in-desk 0.24s ease-out;
  }
}
@keyframes share-sheet-in-desk {
  from { opacity: 0; transform: translateY(16px) scale(0.98); }
  to { opacity: 1; transform: none; }
}
@media (prefers-reduced-motion: reduce) {
  .share-sheet__panel { animation: none; }
}