/* 智能问答专用样式 — iframe / 本站悬浮窗 / 问答页，与全站 style.css 隔离 */

:root {
  --primary: #1e3a5f;
  --accent: #3b6ea8;
  --accent-light: #5a8fc8;
  --white: #ffffff;
  --bg-warm: #f7f9fb;
  --bg-neutral: #eef1f5;
  --text-dark: #0f1b2d;
  --text-body: #3a4a5c;
  --text-muted: #8a96a6;
  --border: #dbe3ec;
  --radius: 4px;
  --radius-md: 6px;
  --transition: all 0.25s ease;
}

*, *::before, *::after { box-sizing: border-box; }

/* 仅 iframe 弹窗页锁定滚动，勿写 html 裸选择器（会锁死全站） */
html:has(body.ai-chat-embed-body) {
  height: 100%;
  overflow: hidden;
}
body.ai-chat-embed-body {
  margin: 0;
  padding: 0;
  height: 100%;
  overflow: hidden;
  font-family: -apple-system, BlinkMacSystemFont, "PingFang SC", "Microsoft YaHei", "Segoe UI", sans-serif;
  color: var(--text-body);
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
  background: var(--white);
}

#ai-chat-widget button,
.ai-chat-embed-body button,
.ai-chat-page button {
  cursor: pointer;
  border: none;
  font-family: inherit;
}
#ai-chat-widget a,
.ai-chat-embed-body a,
.ai-chat-page a {
  color: var(--accent);
  text-decoration: none;
}
#ai-chat-widget a:hover,
.ai-chat-embed-body a:hover,
.ai-chat-page a:hover {
  text-decoration: underline;
}

.ai-chat-embed-body .ai-chat {
  height: 100%;
  min-height: 100%;
  display: flex;
  flex-direction: column;
  border: none;
  border-radius: 0;
  box-shadow: none;
  background: var(--white);
  overflow: hidden;
}

.ai-chat-head {
  flex-shrink: 0;
  display: flex;
  align-items: center;
  gap: 14px;
  padding: 16px 18px;
  background: var(--bg-warm);
  border-bottom: 1px solid var(--border);
}
.ai-chat-head > div:nth-child(2) { flex: 1; min-width: 0; }
.ai-chat-head-icon {
  width: 40px;
  height: 40px;
  border-radius: var(--radius);
  background: var(--white);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 20px;
  border: 1px solid var(--border);
}
.ai-chat-head-title {
  font-size: 15px;
  font-weight: 600;
  color: var(--text-dark);
}
.ai-chat-head-sub {
  font-size: 12px;
  color: var(--text-muted);
  margin-top: 2px;
}
.ai-chat-panel-close {
  flex-shrink: 0;
  margin-left: auto;
  width: 32px;
  height: 32px;
  padding: 0;
  background: transparent;
  font-size: 22px;
  line-height: 1;
  color: var(--text-muted);
  border-radius: var(--radius);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
}
.ai-chat-panel-close:hover {
  color: var(--text-dark);
  background: var(--bg-neutral);
}

.ai-chat-messages {
  flex: 1;
  min-height: 0;
  overflow-y: auto;
  padding: 18px;
  background: var(--bg-neutral);
}
.ai-chat-message {
  margin-bottom: 14px;
  display: flex;
  flex-direction: column;
  align-items: flex-start;
}
.ai-chat-message-user { align-items: flex-end; }
.ai-chat-bubble {
  max-width: 88%;
  padding: 10px 14px;
  border-radius: 12px;
  line-height: 1.65;
  white-space: pre-wrap;
  word-break: break-word;
  font-size: 14px;
}
.ai-chat-message-assistant .ai-chat-bubble {
  background: var(--white);
  border: 1px solid var(--border);
  color: var(--text-body);
}
.ai-chat-message-user .ai-chat-bubble {
  background: var(--primary);
  color: var(--white);
}
.ai-chat-sources {
  margin: 8px 0 0;
  padding-left: 18px;
  font-size: 12px;
  color: var(--text-muted);
  list-style: disc;
}
.ai-chat-sources li { margin-bottom: 4px; }

.ai-chat-image-previews {
  display: flex;
  flex-direction: column;
  gap: 10px;
  margin-top: 10px;
}
.ai-chat-image-preview {
  display: block;
  overflow: hidden;
  border-radius: 10px;
  border: 1px solid var(--border);
  background: var(--bg-neutral);
  line-height: 0;
}
.ai-chat-image-preview img {
  display: block;
  width: 100%;
  max-width: 320px;
  height: auto;
  object-fit: cover;
}
.ai-chat-message-assistant .ai-chat-bubble:has(.ai-chat-image-previews) {
  max-width: min(92%, 360px);
}

.ai-chat-form {
  flex-shrink: 0;
  padding: 14px 18px 18px;
  border-top: 1px solid var(--border);
  background: var(--white);
}
.ai-chat-form textarea {
  width: 100%;
  padding: 10px 12px;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  resize: vertical;
  font-family: inherit;
  font-size: 14px;
  line-height: 1.5;
  min-height: 64px;
}
.ai-chat-form textarea:focus {
  outline: none;
  border-color: var(--accent);
}
.ai-chat-actions {
  margin-top: 10px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
  flex-wrap: wrap;
}
.ai-chat-hint {
  font-size: 12px;
  color: var(--text-muted);
}
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 9px 16px;
  border-radius: var(--radius);
  font-size: 13px;
  font-weight: 500;
  transition: var(--transition);
}
.btn-primary {
  background: var(--accent);
  color: var(--white);
}
.btn-primary:hover { background: var(--accent-light); }
.btn-primary:disabled {
  opacity: 0.6;
  cursor: not-allowed;
}
.ai-chat-loading .ai-chat-bubble {
  opacity: 0.7;
  font-style: italic;
}

/* ====== 全站问答页 /ai/chat.html ====== */
.ai-chat-page { padding: 40px 0 80px; }
.ai-chat-page .ai-chat {
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  background: var(--white);
  overflow: hidden;
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.06);
}
.ai-chat-page .ai-chat-messages {
  min-height: 360px;
  max-height: 60vh;
}

/* ====== 本站悬浮窗 #ai-chat-widget / 后台 #admin-ai-chat-widget ====== */
#ai-chat-widget,
#admin-ai-chat-widget {
  z-index: 9990;
  pointer-events: none;
}
#ai-chat-widget > *,
#admin-ai-chat-widget > * { pointer-events: auto; }

#admin-ai-chat-widget {
  z-index: 99990;
}

.ai-chat-launcher {
  position: fixed;
  z-index: 9991;
  width: 56px;
  height: 56px;
  border: none;
  border-radius: 50%;
  background: linear-gradient(135deg, #02c7c7, #e90ec4);
  color: var(--white);
  font-size: 24px;
  line-height: 1;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.18);
  transition: transform 0.2s ease, box-shadow 0.2s ease, opacity 0.2s ease;
}
.ai-chat-launcher:hover {
  transform: scale(1.06);
  box-shadow: 0 6px 24px rgba(0, 0, 0, 0.22);
}
#ai-chat-widget:has(.ai-chat-panel.is-open) .ai-chat-launcher,
#admin-ai-chat-widget:has(.ai-chat-panel.is-open) .ai-chat-launcher {
  opacity: 0;
  pointer-events: none;
  transform: scale(0.85);
}

#ai-chat-widget.ai-chat-pos-bottom_right .ai-chat-launcher,
#admin-ai-chat-widget.ai-chat-pos-bottom_right .ai-chat-launcher {
  right: var(--ai-chat-offset-x, 24px);
  bottom: var(--ai-chat-offset-y, 96px);
  left: auto;
  top: auto;
}
#ai-chat-widget.ai-chat-pos-bottom_right .ai-chat-panel,
#admin-ai-chat-widget.ai-chat-pos-bottom_right .ai-chat-panel {
  right: var(--ai-chat-offset-x, 24px);
  bottom: calc(var(--ai-chat-offset-y, 96px) + 68px);
  left: auto;
  top: auto;
}
#ai-chat-widget.ai-chat-pos-bottom_left .ai-chat-launcher,
#admin-ai-chat-widget.ai-chat-pos-bottom_left .ai-chat-launcher {
  left: var(--ai-chat-offset-x, 24px);
  bottom: var(--ai-chat-offset-y, 96px);
  right: auto;
  top: auto;
}
#ai-chat-widget.ai-chat-pos-bottom_left .ai-chat-panel,
#admin-ai-chat-widget.ai-chat-pos-bottom_left .ai-chat-panel {
  left: var(--ai-chat-offset-x, 24px);
  bottom: calc(var(--ai-chat-offset-y, 96px) + 68px);
  right: auto;
  top: auto;
}
#ai-chat-widget.ai-chat-pos-top_right .ai-chat-launcher,
#admin-ai-chat-widget.ai-chat-pos-top_right .ai-chat-launcher {
  right: var(--ai-chat-offset-x, 24px);
  top: var(--ai-chat-offset-y, 24px);
  left: auto;
  bottom: auto;
}
#ai-chat-widget.ai-chat-pos-top_right .ai-chat-panel,
#admin-ai-chat-widget.ai-chat-pos-top_right .ai-chat-panel {
  right: var(--ai-chat-offset-x, 24px);
  top: calc(var(--ai-chat-offset-y, 24px) + 68px);
  left: auto;
  bottom: auto;
  transform: translateY(-12px) scale(0.98);
}
#ai-chat-widget.ai-chat-pos-top_right .ai-chat-panel.is-open,
#admin-ai-chat-widget.ai-chat-pos-top_right .ai-chat-panel.is-open {
  transform: translateY(0) scale(1);
}
#ai-chat-widget.ai-chat-pos-top_left .ai-chat-launcher,
#admin-ai-chat-widget.ai-chat-pos-top_left .ai-chat-launcher {
  left: var(--ai-chat-offset-x, 24px);
  top: var(--ai-chat-offset-y, 24px);
  right: auto;
  bottom: auto;
}
#ai-chat-widget.ai-chat-pos-top_left .ai-chat-panel,
#admin-ai-chat-widget.ai-chat-pos-top_left .ai-chat-panel {
  left: var(--ai-chat-offset-x, 24px);
  top: calc(var(--ai-chat-offset-y, 24px) + 68px);
  right: auto;
  bottom: auto;
  transform: translateY(-12px) scale(0.98);
}
#ai-chat-widget.ai-chat-pos-top_left .ai-chat-panel.is-open,
#admin-ai-chat-widget.ai-chat-pos-top_left .ai-chat-panel.is-open {
  transform: translateY(0) scale(1);
}

.ai-chat-backdrop {
  position: fixed;
  inset: 0;
  z-index: 9988;
  background: rgba(15, 23, 42, 0.35);
  opacity: 0;
  visibility: hidden;
  pointer-events: none;
  transition: opacity 0.25s ease, visibility 0.25s ease;
}
.ai-chat-backdrop.is-open {
  opacity: 1;
  visibility: visible;
  pointer-events: auto;
}

.ai-chat-panel {
  position: fixed;
  z-index: 9992;
  width: min(400px, calc(100vw - 32px));
  max-height: min(72vh, 640px);
  display: flex;
  flex-direction: column;
  opacity: 0;
  visibility: hidden;
  pointer-events: none;
  transform: translateY(12px) scale(0.98);
  transition: opacity 0.25s ease, transform 0.25s ease, visibility 0.25s ease;
  border-radius: var(--radius-md);
  overflow: hidden;
  box-shadow: 0 16px 48px rgba(0, 0, 0, 0.2);
}
.ai-chat-panel.is-open {
  opacity: 1;
  visibility: visible;
  pointer-events: auto;
  transform: translateY(0) scale(1);
}

#ai-chat-widget .ai-chat,
#admin-ai-chat-widget .ai-chat {
  margin: 0;
  max-height: min(72vh, 640px);
  display: flex;
  flex-direction: column;
  border: none;
  border-radius: 0;
  box-shadow: none;
  background: var(--white);
  overflow: hidden;
}
#ai-chat-widget .ai-chat-messages,
#admin-ai-chat-widget .ai-chat-messages {
  flex: 1;
  min-height: 220px;
  max-height: none;
  overflow-y: auto;
}
#ai-chat-widget .ai-chat-form,
#admin-ai-chat-widget .ai-chat-form { flex-shrink: 0; }

#admin-ai-chat-widget .ai-chat-panel {
  width: min(420px, calc(100vw - 32px));
}

#admin-ai-chat-widget .admin-ai-chat-head {
  flex-direction: column;
  align-items: stretch;
  gap: 12px;
  padding: 14px 16px 12px;
  background: linear-gradient(180deg, #f8fafc 0%, #f1f5f9 100%);
}

#admin-ai-chat-widget .ai-chat-head-main {
  display: flex;
  align-items: center;
  gap: 12px;
  min-width: 0;
}

#admin-ai-chat-widget .ai-chat-head-text {
  flex: 1;
  min-width: 0;
}

#admin-ai-chat-widget .ai-chat-head-toolbar {
  display: flex;
  align-items: center;
  gap: 8px;
  flex-wrap: wrap;
}

#admin-ai-chat-widget .admin-ai-chat-assistant-select {
  flex: 1 1 auto;
  min-width: 0;
  max-width: none;
  margin: 0;
  font-size: 13px;
  padding: 7px 10px;
  border-radius: 8px;
  border: 1px solid #cbd5e1;
  background: #fff;
  color: #0f172a;
  box-shadow: 0 1px 2px rgba(15, 23, 42, 0.04);
}

#admin-ai-chat-widget .admin-ai-chat-assistant-select:focus {
  outline: none;
  border-color: #7c3aed;
  box-shadow: 0 0 0 3px rgba(124, 58, 237, 0.12);
}

#admin-ai-chat-widget .ai-chat-new-thread {
  margin-right: 0;
  padding: 7px 12px;
  font-size: 13px;
  border-radius: 8px;
  border-color: #cbd5e1;
  color: #475569;
}

#admin-ai-chat-widget .ai-chat-panel-close {
  margin-left: 0;
}

.admin-ai-chat-assistant-select {
  max-width: 120px;
  margin-left: auto;
  margin-right: 8px;
  font-size: 12px;
  padding: 4px 6px;
  border-radius: 6px;
  border: 1px solid #e2e8f0;
  background: #fff;
}

.ai-chat-new-thread {
  margin-right: 4px;
  padding: 4px 8px;
  border: 1px solid #e2e8f0;
  border-radius: 6px;
  background: #fff;
  color: #64748b;
  font-size: 12px;
  line-height: 1.2;
  cursor: pointer;
  white-space: nowrap;
}
.ai-chat-new-thread:hover {
  border-color: #c084fc;
  color: #7e22ce;
}

@media (max-width: 768px) {
  #ai-chat-widget,
  #admin-ai-chat-widget {
    --ai-chat-offset-x: max(16px, var(--ai-chat-offset-x, 24px));
  }
  .ai-chat-panel {
    width: calc(100vw - 32px);
    max-height: min(68vh, 560px);
  }
}