/* 讀者回報 / 聯絡我 — 頁面右下角靜態按鈕 · WeChat only */
#contactFab {
  position: absolute;
  right: 18px;
  bottom: 18px;
  padding: 0;
  font-family: "Noto Sans TC", "LXGW WenKai", system-ui, sans-serif;
}
.site-footer--home { position: relative; }
#contactFab .fab-btn {
  width: 54px;
  height: 54px;
  border-radius: 50%;
  border: none;
  background: #07C160;                 /* WeChat green */
  color: #fff;
  cursor: pointer;
  box-shadow: 0 4px 14px rgba(7, 90, 40, .32);
  display: flex;
  align-items: center;
  justify-content: center;
  transition: transform .15s ease, background .15s ease;
}
#contactFab .fab-btn:hover {
  transform: scale(1.06);
  background: #06AD56;
}
#contactFab .fab-btn svg { width: 30px; height: 30px; display: block; }
#contactFab .fab-panel {
  position: absolute;
  right: 0;
  bottom: calc(100% + 12px);
  width: 300px;
  max-width: calc(100vw - 40px);
  background: #fffdf8;
  border: 1px solid #e7dcc4;
  border-radius: 14px;
  box-shadow: 0 10px 30px rgba(60, 40, 10, .22);
  padding: 16px;
  display: none;
}
#contactFab.open .fab-panel { display: block; }
#contactFab .fab-panel h3 {
  margin: 0 0 4px;
  font-size: 15px;
  color: #3a2f1a;
}
#contactFab .fab-panel p {
  margin: 0 0 12px;
  font-size: 12.5px;
  color: #6b5a3a;
  line-height: 1.55;
}
#contactFab .fab-wx {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-bottom: 12px;
}
#contactFab .fab-wx-id {
  flex: 1;
  min-width: 0;
  font-family: ui-monospace, Menlo, Consolas, monospace;
  font-size: 14px;
  color: #3a2f1a;
  background: #f3ecdd;
  border: 1px solid #e2d6bd;
  border-radius: 8px;
  padding: 8px 10px;
  user-select: all;
  overflow: hidden;
  text-overflow: ellipsis;
}
#contactFab .fab-copy {
  border: none;
  background: #07C160;
  color: #fff;
  font-size: 12.5px;
  padding: 8px 10px;
  border-radius: 8px;
  cursor: pointer;
  white-space: nowrap;
  transition: background .15s ease;
}
#contactFab .fab-copy:hover { background: #06AD56; }
#contactFab .fab-copy.done { background: #4a7a3a; }
#contactFab .fab-qr-label {
  font-size: 12.5px;
  color: #3a2f1a;
  margin-bottom: 6px;
  font-weight: 600;
}
#contactFab .fab-qr {
  width: 160px;
  height: 160px;
  object-fit: contain;
  border: 1px solid #e7dcc4;
  border-radius: 8px;
  display: block;
  margin: 0 auto 4px;
}
#contactFab .fab-foot {
  margin-top: 10px;
  font-size: 11px;
  color: #9b8a6a;
  text-align: center;
}
@media (max-width: 600px) {
  #contactFab { padding: 0; right: 16px; bottom: 16px; }
  #contactFab .fab-panel { right: 0; bottom: calc(100% + 12px); width: 280px; }
}