.jx-ask-fab {
  position: fixed;
  right: 1rem;
  bottom: 1.2rem;
  z-index: 90;
  min-height: 2.65rem;
  padding: 0.55rem 1rem;
  border: 1px solid rgba(201, 162, 39, 0.35);
  border-radius: 999px;
  cursor: pointer;
  color: #fbf6e6;
  background: rgba(201, 162, 39, 0.92);
  box-shadow: 0 6px 20px rgba(42, 34, 20, 0.18);
  font-family: var(--font-sans, sans-serif);
  font-size: 0.88rem;
  letter-spacing: 0.12em;
  transition: transform 0.2s ease, background 0.2s ease, box-shadow 0.2s ease, opacity 0.2s ease;
  opacity: 0.92;
}

.jx-ask-fab-label {
  display: inline-block;
  line-height: 1.2;
  white-space: nowrap;
}

.jx-ask-fab:hover,
.jx-ask-fab.is-open {
  opacity: 1;
  transform: translateY(-2px);
  background: var(--jade-deep, #8f7318);
  box-shadow: 0 10px 26px rgba(42, 34, 20, 0.24);
}

.jx-ask-panel {
  position: fixed;
  right: 1rem;
  bottom: 4.5rem;
  z-index: 91;
  width: min(26rem, calc(100vw - 1.5rem));
  max-height: min(78vh, 36rem);
  display: flex;
  flex-direction: column;
  background: rgba(247, 249, 248, 0.98);
  border: 1px solid var(--line, rgba(42, 34, 20, 0.12));
  box-shadow: 0 16px 40px rgba(42, 34, 20, 0.16);
  backdrop-filter: blur(10px);
}

.jx-ask-panel[hidden] {
  display: none !important;
}

.jx-ask-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.75rem;
  padding: 0.85rem 1rem;
  border-bottom: 1px solid var(--line, rgba(42, 34, 20, 0.12));
}

.jx-ask-head strong {
  font-family: var(--font-serif, serif);
  font-weight: 500;
  font-size: 1.05rem;
}

.jx-ask-close {
  border: 0;
  background: transparent;
  cursor: pointer;
  font-size: 1.2rem;
  line-height: 1;
  color: var(--ink-soft, #3a4540);
}

.jx-ask-body {
  padding: 0.85rem 1rem 1rem;
  overflow: auto;
  display: grid;
  gap: 0.75rem;
}

.jx-ask-hint {
  margin: 0;
  font-size: 0.82rem;
  color: var(--ink-soft, #3a4540);
  font-family: var(--font-sans, sans-serif);
  line-height: 1.55;
}

.jx-ask-input {
  width: 100%;
  min-height: 5.5rem;
  resize: vertical;
  box-sizing: border-box;
  padding: 0.65rem 0.75rem;
  border: 1px solid var(--line, rgba(42, 34, 20, 0.12));
  background: rgba(255, 255, 255, 0.75);
  font: inherit;
  color: var(--ink, #2a2214);
}

.jx-ask-actions {
  display: flex;
  gap: 0.5rem;
  align-items: center;
}

.jx-ask-actions button {
  font-family: var(--font-sans, sans-serif);
  font-size: 0.9rem;
  padding: 0.55rem 0.95rem;
  border: 1px solid var(--jade, #c9a227);
  background: var(--jade, #c9a227);
  color: #fbf6e6;
  cursor: pointer;
}

.jx-ask-actions button:disabled {
  opacity: 0.55;
  cursor: not-allowed;
}

.jx-ask-answer {
  display: grid;
  gap: 1rem;
}

.jx-ask-section h4 {
  margin: 0 0 0.45rem;
  font-family: var(--font-sans, sans-serif);
  font-size: 0.86rem;
  font-weight: 600;
  letter-spacing: 0.04em;
  color: var(--jade-deep, #8f7318);
}

.jx-ask-passage {
  margin-bottom: 0.65rem;
}

.jx-ask-label {
  display: inline-block;
  font-family: var(--font-sans, sans-serif);
  font-size: 0.78rem;
  font-weight: 600;
  letter-spacing: 0.06em;
  color: var(--jade, #c9a227);
  margin-bottom: 0.25rem;
}

.jx-ask-passage blockquote {
  margin: 0.25rem 0 0.4rem;
  padding: 0.55rem 0.7rem;
  border-left: 3px solid rgba(201, 162, 39, 0.35);
  background: rgba(255, 255, 255, 0.65);
  font-size: 0.9rem;
  line-height: 1.65;
  color: var(--ink, #2a2214);
  white-space: pre-wrap;
  word-break: break-word;
}

.jx-ask-summary {
  font-size: 0.95rem;
  line-height: 1.7;
  white-space: pre-wrap;
  word-break: break-word;
}

.jx-ask-sources {
  margin: 0;
  padding: 0;
  list-style: none;
  font-family: var(--font-sans, sans-serif);
  font-size: 0.84rem;
  line-height: 1.55;
}

.jx-ask-sources li {
  margin: 0.4rem 0;
}

.jx-ask-sources a {
  color: var(--jade-deep, #8f7318);
}

.jx-ask-error {
  color: #8a2f2f;
  font-family: var(--font-sans, sans-serif);
  font-size: 0.88rem;
  margin: 0;
}

.jx-ask-foot {
  margin: 0;
  font-size: 0.75rem;
  color: var(--ink-soft, #3a4540);
  font-family: var(--font-sans, sans-serif);
  line-height: 1.5;
}

.jx-ask-meta {
  margin: 0;
  font-size: 0.72rem;
  color: var(--ink-soft, #3a4540);
  font-family: var(--font-sans, sans-serif);
}

@media (max-width: 640px), (hover: none) and (pointer: coarse) {
  .jx-ask-fab {
    right: max(0.7rem, env(safe-area-inset-right));
    bottom: max(0.85rem, env(safe-area-inset-bottom));
    font-size: 0.85rem;
    padding: 0.55rem 0.95rem;
    min-height: 2.85rem;
  }
  .jx-ask-panel {
    right: max(0.5rem, env(safe-area-inset-right));
    left: max(0.5rem, env(safe-area-inset-left));
    bottom: calc(4.2rem + env(safe-area-inset-bottom));
    width: auto;
    max-height: min(70vh, 32rem);
  }
}

/* 学习页有目录 FAB（左下）时，问面板仍从右下升起，互不挡 */
body:has(.learn-toc-fab) .jx-ask-fab {
  z-index: 32;
}
body:has(.learn-toc-fab) .jx-ask-panel {
  z-index: 33;
}