/* ═══════════════════════════════════════════════
   Q&A Fullscreen — 智能问答全屏页面
   基于 Aurora UI v4.2 设计规范重构
   ═══════════════════════════════════════════════ */

/* ═══ QA容器（嵌入框架 content 区域） ═══ */
.qa-fullscreen {
  position: absolute; inset: 0; z-index: 1;
  background: var(--bg-base);
  display: flex; flex-direction: column;
  overflow: hidden;
}

/* ═══ 环境光效（使用系统accent色） ═══ */
.qa-ambient {
  position: absolute; inset: 0; pointer-events: none; z-index: 0;
  overflow: hidden;
}
.qa-ambient .glow {
  position: absolute; border-radius: 50%; filter: blur(140px);
}
.qa-ambient .g1 {
  width: 700px; height: 700px; top: -280px; left: 50%; transform: translateX(-50%);
  background: radial-gradient(circle, rgba(var(--theme-accent-rgb),0.06) 0%, transparent 70%);
  animation: qa-drift 20s ease-in-out infinite;
}
.qa-ambient .g2 {
  width: 500px; height: 500px; bottom: -200px; left: -100px;
  background: radial-gradient(circle, rgba(var(--theme-accent-rgb),0.03) 0%, transparent 70%);
  animation: qa-drift 25s ease-in-out infinite reverse;
}
@keyframes qa-drift {
  0%, 100% { transform: translate(0, 0); }
  50% { transform: translate(40px, 30px); }
}

/* ═══ Home视图 ═══ */
.qa-home {
  position: relative; z-index: 2;
  height: 100%; display: flex; flex-direction: column;
  transition: opacity 0.4s ease, transform 0.4s ease;
}
.qa-home.hidden {
  opacity: 0; transform: scale(0.98);
  pointer-events: none; position: absolute; inset: 0;
}

.qa-home-bar {
  display: flex; justify-content: space-between; align-items: center;
  padding: 28px 40px; flex-shrink: 0;
}
.qa-logo { display: flex; align-items: center; gap: 10px; }
.qa-logo-icon {
  width: 32px; height: 32px; border-radius: 9px;
  background: linear-gradient(135deg, var(--accent), var(--accent-deep, var(--accent)));
  display: flex; align-items: center; justify-content: center;
  font-family: var(--font-display); font-weight: 800;
  font-size: var(--fs-2); color: var(--btn-text, #fff);
}
.qa-logo-text {
  font-family: var(--font-display); font-weight: 700;
  font-size: var(--fs-2); color: var(--text-bright);
}
.qa-home-avatar {
  width: 34px; height: 34px; border-radius: 50%;
  background: var(--bg-elevated); border: 1px solid var(--border-default);
  display: flex; align-items: center; justify-content: center;
  font-size: var(--fs-2); font-weight: 600; color: var(--text-secondary);
  cursor: pointer; overflow: hidden;
}
.qa-home-avatar img { width: 100%; height: 100%; object-fit: cover; }

.qa-home-stage {
  flex: 1; display: flex; flex-direction: column;
  align-items: center; justify-content: center;
  padding: 0 24px;
}

.qa-greeting {
  font-family: var(--font-display);
  font-size: clamp(26px, 4.5vw, 42px);
  font-weight: 800; letter-spacing: -1.5px;
  margin-bottom: 48px; text-align: center;
  background: linear-gradient(135deg, var(--text-bright) 20%, var(--text-ghost) 100%);
  -webkit-background-clip: text; -webkit-text-fill-color: transparent;
  background-clip: text;
  opacity: 0; animation: qa-rise 0.7s ease 0.1s forwards;
}
@keyframes qa-rise {
  from { opacity: 0; transform: translateY(24px); }
  to { opacity: 1; transform: translateY(0); }
}

/* ═══ 搜索框（使用 Aurora UI Composer 组件） ═══ */
.qa-search-wrap {
  width: 100%; max-width: 853px;
  opacity: 0; animation: qa-rise 0.7s ease 0.2s forwards;
}
.qa-search-box {
  position: relative;
  display: flex; align-items: flex-end;
  background: var(--surface-2);
  border: 1px solid var(--border);
  border-radius: var(--r-lg); padding: 6px;
  backdrop-filter: blur(24px);
  transition: border-color var(--dur-2) var(--ease-out), 
              box-shadow var(--dur-3) var(--ease-out),
              transform var(--dur-2) var(--ease-out);
}
.qa-search-box:hover {
  border-color: var(--border-strong);
  transform: translateY(-1px);
}
.qa-search-box:focus-within {
  border-color: var(--accent);
  background: var(--surface);
  box-shadow: 0 0 0 .2rem var(--accent-soft),
              0 14px 34px -16px var(--accent-glow);
  transform: translateY(-2px);
}
.qa-search-box textarea {
  flex: 1; background: none; border: none; outline: none;
  color: var(--text-1);
  font-size: var(--fs-3); line-height: 1.6;
  font-family: 'Noto Sans SC', sans-serif;
  padding: 16px 22px;
  resize: none; min-height: 56px; max-height: 200px;
}
.qa-search-box textarea:focus { outline: none; border: none; box-shadow: none; }
.qa-search-box textarea::placeholder { color: var(--text-4); font-weight: 400; }
.qa-send-btn {
  width: 3.5rem; height: 3.5rem; border-radius: var(--r-md);
  background: linear-gradient(180deg, var(--grad-a), var(--grad-b));
  border: none; cursor: pointer; flex-shrink: 0;
  display: flex; align-items: center; justify-content: center;
  transition: transform var(--dur-2) var(--ease-spring), 
              box-shadow var(--dur-3) var(--ease-out);
  color: #fff;
  box-shadow: inset 0 1px 0 rgba(255,255,255,.24), 0 6px 18px -8px var(--accent-glow);
}
.qa-send-btn:hover {
  transform: scale(1.06);
  box-shadow: inset 0 1px 0 rgba(255,255,255,.32), 0 14px 30px -10px var(--accent-glow);
}
.qa-send-btn:active { transform: scale(0.98); }
.qa-send-btn:disabled { opacity: 0.38; cursor: not-allowed; transform: none; box-shadow: none; }
.qa-send-btn svg { width: 1.375rem; height: 1.375rem; }

/* ═══ 模式切换 ═══ */
.qa-search-meta {
  display: flex; align-items: center; justify-content: center;
  margin-top: 16px; padding: 0 6px;
  opacity: 0; animation: qa-rise 0.7s ease 0.3s forwards;
}
.qa-modes {
  display: flex; gap: 8px;
}

/* ═══ 建议词（使用 Aurora UI Tag 组件） ═══ */
.qa-suggestions {
  margin-top: 56px; width: 100%; max-width: 853px;
  opacity: 0; animation: qa-rise 0.7s ease 0.35s forwards;
}
.qa-sug-row { display: flex; flex-wrap: wrap; gap: 8px; justify-content: center; }
.qa-sug-chip {
  display: inline-flex; align-items: center; gap: .375rem;
  height: 2rem; padding: 0 .875rem;
  border-radius: var(--r-full);
  font-size: var(--fs-2); font-weight: 500;
  letter-spacing: .01em;
  border: 1px solid var(--border);
  background: var(--surface-2);
  color: var(--text-2);
  cursor: pointer; 
  transition: transform var(--dur-2) var(--ease-spring), 
              background-color var(--dur-2) var(--ease-out),
              border-color var(--dur-2) var(--ease-out),
              box-shadow var(--dur-3) var(--ease-out);
  white-space: nowrap;
}
.qa-sug-chip:hover {
  background: var(--accent-soft);
  border-color: var(--accent-line);
  color: var(--accent-text);
  transform: translateY(-2px) scale(1.04);
  box-shadow: var(--shadow-md);
}

/* ═══ 最近搜索（使用 Aurora UI 设计规范） ═══ */
.qa-recent {
  margin-top: 48px; width: 100%; max-width: 853px;
  opacity: 0; animation: qa-rise 0.7s ease 0.4s forwards;
}
.qa-recent-head {
  display: flex; align-items: center; justify-content: space-between;
  margin-bottom: 12px; padding: 0 4px;
}
.qa-recent-title {
  font-size: var(--fs-1); font-family: var(--font-mono);
  color: var(--text-4); text-transform: uppercase; letter-spacing: .12em;
}
.qa-recent-clear {
  font-size: var(--fs-1); color: var(--text-4);
  background: none; border: none; cursor: pointer;
  font-family: 'Noto Sans SC', sans-serif; 
  transition: color var(--dur-2) var(--ease-out);
}
.qa-recent-clear:hover { color: var(--text-2); }
.qa-recent-list {
  display: flex; flex-direction: column; gap: 1px;
  max-height: 170px; overflow-y: auto;
  mask-image: linear-gradient(to bottom, #000 85%, transparent 100%);
  -webkit-mask-image: linear-gradient(to bottom, #000 85%, transparent 100%);
}
.qa-recent-list::-webkit-scrollbar { width: 4px; }
.qa-recent-list::-webkit-scrollbar-track { background: transparent; }
.qa-recent-list::-webkit-scrollbar-thumb { background: var(--border); border-radius: var(--r-full); }
.qa-recent-item {
  display: flex; align-items: center; gap: 14px;
  padding: 11px 16px; border-radius: var(--r-md);
  cursor: pointer; 
  transition: background-color var(--dur-2) var(--ease-out),
              transform var(--dur-2) var(--ease-out);
}
.qa-recent-item:hover { 
  background: var(--surface-2); 
  transform: translateX(3px);
}
.qa-ri-icon {
  width: 28px; height: 28px; border-radius: 7px;
  background: var(--bg-card);
  display: flex; align-items: center; justify-content: center; flex-shrink: 0;
}
.qa-ri-icon svg { width: 13px; height: 13px; color: var(--text-ghost); }
.qa-ri-text {
  flex: 1; font-size: var(--fs-2); color: var(--text-secondary);
  white-space: nowrap; overflow: hidden; text-overflow: ellipsis;
}
.qa-ri-tag {
  padding: 2px 8px; border-radius: 4px;
  font-size: var(--fs-1); font-family: var(--font-body);
  font-weight: 500; flex-shrink: 0;
}
.qa-ri-tag.local { background: rgba(var(--theme-accent-rgb), 0.1); color: var(--accent); }
.qa-ri-tag.web { background: rgba(90,156,246,0.1); color: #5a9cf6; }
.qa-ri-time {
  font-size: var(--fs-1); color: var(--text-ghost);
  font-family: var(--font-body); flex-shrink: 0;
}

/* ═══════════════════════════════════════════════
   Result视图（适配框架布局）
   ═══════════════════════════════════════════════ */
.qa-result {
  position: relative; z-index: 2;
  height: 100%; display: flex; flex-direction: column;
  transition: opacity 0.4s ease, transform 0.4s ease;
}
.qa-result.hidden {
  opacity: 0; transform: scale(1.02);
  pointer-events: none; position: absolute; inset: 0;
}

/* ═══ 主体区域 ═══ */
.qa-r-body {
  flex: 1; overflow-y: auto; display: flex;
}
.qa-r-body::-webkit-scrollbar { width: 5px; }
.qa-r-body::-webkit-scrollbar-track { background: transparent; }
.qa-r-body::-webkit-scrollbar-thumb { background: var(--border-default); border-radius: 4px; }

/* ═══ 悬浮返回（与 fd-back-btn 同款式）：常驻正文右上可达处，不随正文滚走 ═══
   窄屏（<1200px）右侧无空白，贴屏幕右上角；正文列顶内边距 44px，按钮同一水平带 ═══ */
.qa-back-fab {
  position: absolute; right: 1.5rem; top: 2.75rem; z-index: 100;
  display: inline-flex; align-items: center; gap: .375rem;
  padding: .5rem .875rem; border-radius: 999px;
  background: var(--accent); border: none;
  color: #fff; cursor: pointer;
  box-shadow: 0 4px 14px color-mix(in srgb, var(--accent) 28%, transparent);
  transition: transform .4s var(--ease-spring), box-shadow .3s var(--ease-out), background-color .25s var(--ease-out);
  will-change: transform;
}
.qa-back-fab svg {
  width: 1.125rem; height: 1.125rem;
  stroke: #fff; stroke-width: 2.25; fill: none;
  stroke-linecap: round; stroke-linejoin: round;
  transition: transform .45s var(--ease-spring);
}
.qa-back-fab span {
  font-size: var(--fs-1); font-weight: 500; letter-spacing: .04em;
  color: #fff; white-space: nowrap;
}
.qa-back-fab:hover {
  transform: translateY(-2px);
  background: color-mix(in srgb, var(--accent) 88%, #fff);
  box-shadow: 0 8px 20px color-mix(in srgb, var(--accent) 38%, transparent);
}
.qa-back-fab:hover svg { transform: translateX(-2px); }
.qa-back-fab:active { transform: translateY(-1px) scale(.96); transition-duration: .1s; }

/* ≥1200px 时正文列（820px，两侧内边距各 48px）右缘外有足够空白，落进那片空白里 */
@media (min-width: 1200px) {
  .qa-back-fab { left: calc(50% + 386px); right: auto; }
}

/* ═══ 上下滑动切换前后问题的提示胶囊 ═══ */
.qa-turn-hint {
  position: absolute; left: 50%; transform: translateX(-50%);
  z-index: 20; pointer-events: none;
  padding: 4px 12px; border-radius: 999px;
  font-size: var(--fs-1); color: var(--text-3);
  background: var(--surface-2); border: 1px solid var(--border);
  box-shadow: var(--shadow-sm); opacity: .85;
  white-space: nowrap;
}
.qa-turn-hint--prev { top: 10px; }
.qa-turn-hint--next { bottom: 6.5rem; }

.qa-r-main {
  flex: 1; padding: 44px 48px 120px;
  max-width: 820px; margin: 0 auto;
}

/* ═══ 问题区 ═══ */
.qa-q-section { margin-bottom: 36px; animation: qa-rise 0.5s ease both; }
.qa-q-badge {
  display: inline-flex; align-items: center; gap: 6px;
  padding: 4px 12px; border-radius: 6px;
  font-size: var(--fs-1); font-family: var(--font-body);
  margin-bottom: 14px;
}
.qa-q-badge.local { background: rgba(var(--theme-accent-rgb), 0.1); color: var(--accent); }
.qa-q-badge.web { background: rgba(90,156,246,0.1); color: #5a9cf6; }
.qa-q-text {
  font-size: clamp(20px, 3vw, 26px);
  font-weight: 700; line-height: 1.45; color: var(--text-bright);
}

/* ═══ 回答区 ═══ */
.qa-a-section { animation: qa-rise 0.5s ease 0.1s both; }
.qa-a-header {
  display: flex; align-items: center; gap: 10px; margin-bottom: 22px;
}
.qa-a-avatar {
  width: 30px; height: 30px; border-radius: 9px;
  background: linear-gradient(135deg, var(--accent), var(--accent-deep, var(--accent)));
  display: flex; align-items: center; justify-content: center;
  font-family: var(--font-display); font-weight: 800;
  font-size: var(--fs-1); color: var(--btn-text, #fff); flex-shrink: 0;
}
.qa-a-name { font-size: var(--fs-2); font-weight: 600; color: var(--text-secondary); }
.qa-a-divider { height: 1px; background: var(--border-default); margin: 28px 0; }
/* 字号与详情页内容同源：qa.html 由 QaFsPref 注入 --qa-body-fs；index 嵌入态回退 全局--fs-2+2px */
.qa-a-body { font-size: var(--qa-body-fs, calc(var(--fs-2) + 2px)); line-height: 2; color: var(--text-primary); }
.qa-a-body p { margin-bottom: 16px; }
.qa-a-body strong { color: var(--accent); font-weight: 600; }
.qa-a-body ol, .qa-a-body ul { margin: 12px 0 16px 22px; }
.qa-a-body li { margin-bottom: 8px; }
.qa-a-body br + br { display: block; content: ""; margin-top: 8px; }
/* 联网链路降级提醒（检索词改写/相关性筛查退回粗筛时才出现，正常链路不渲染） */
.qa-web-note { display: flex; align-items: flex-start; gap: 6px; margin-top: 10px; font-size: var(--fs-1); line-height: 1.6; color: var(--warning); }
.qa-web-note svg { flex: 0 0 auto; width: 14px; height: 14px; margin-top: 2px; }
/* 检索口径（V190）：系统把「前年/我国/我们单位」推成了什么——信息行不是告警，取 --text-ghost 不借 --warning */
.qa-web-plan { display: flex; align-items: flex-start; gap: 6px; margin-top: 10px; font-size: var(--fs-1); line-height: 1.6; color: var(--text-ghost); }
.qa-web-plan svg { flex: 0 0 auto; width: 14px; height: 14px; margin-top: 2px; }

/* ═══ MD 标题分级加粗渲染 ═══ */
.qa-a-body .qa-md-h1 {
  font-size: var(--fs-4); font-weight: 800; line-height: 1.5;
  color: var(--text-bright); margin: 26px 0 14px;
  padding-bottom: 8px; border-bottom: 1px solid var(--border-default);
}
.qa-a-body .qa-md-h2 {
  font-size: var(--fs-3); font-weight: 700; line-height: 1.5;
  color: var(--text-bright); margin: 20px 0 10px;
}
.qa-a-body .qa-md-h3 {
  font-size: var(--fs-2); font-weight: 600; line-height: 1.5;
  color: var(--text-primary); margin: 16px 0 8px;
}
.qa-a-body .qa-md-h1:first-child, .qa-a-body .qa-md-h2:first-child, .qa-a-body .qa-md-h3:first-child { margin-top: 0; }
.qa-a-body pre.qa-md-code {
  background: var(--bg-elevated); border: 1px solid var(--border-default);
  border-radius: 8px; padding: 12px 14px; overflow-x: auto;
  font-family: var(--font-body); font-size: var(--fs-1); line-height: 1.6;
  color: var(--text-secondary); margin: 12px 0 16px;
  white-space: pre-wrap; word-break: break-word;
}
.qa-a-body code {
  font-family: var(--font-body); font-size: var(--fs-2);
  background: var(--bg-elevated); color: var(--accent);
  padding: 1px 5px; border-radius: 4px;
}

/* ═══ 引用标记（行内） ═══ */
.qa-cm {
  display: inline-flex; align-items: center; justify-content: center;
  width: 20px; height: 20px;
  background: rgba(var(--theme-accent-rgb), 0.18); color: var(--accent);
  font-size: var(--fs-1); font-weight: 700; font-family: var(--font-body);
  border-radius: 5px; margin: 0 2px;
  cursor: pointer; transition: 0.2s ease;
  position: relative; top: -1px; vertical-align: baseline;
}
.qa-cm:hover { background: var(--accent); color: var(--btn-text, #fff); transform: scale(1.15); }

/* ═══ 引用卡片网格（使用 Aurora UI Panel 组件） ═══ */
.qa-ref-grid {
  display: grid; grid-template-columns: 1fr 1fr; gap: 8px;
  margin-top: 28px;
  grid-auto-rows: 1fr;
}
.qa-ref-card {
  background: var(--surface); 
  border: 1px solid var(--border);
  border-radius: var(--r-lg); 
  padding: 1rem 1.125rem;
  display: flex; gap: 12px; align-items: flex-start;
  cursor: pointer; 
  transition: transform var(--dur-3) var(--ease-out),
              border-color var(--dur-2) var(--ease-out),
              box-shadow var(--dur-3) var(--ease-out),
              background-color var(--dur-2) var(--ease-out);
  height: 100%;
  box-shadow: var(--shadow-sm);
}
.qa-ref-card:hover {
  transform: translateY(-3px);
  border-color: var(--accent-line);
  box-shadow: var(--shadow-md), 0 0 0 1px var(--accent-line);
  background: var(--surface-2);
}
.qa-rc-num {
  width: 28px; height: 28px; border-radius: var(--r-sm);
  background: var(--accent-soft); color: var(--accent-text);
  font-size: var(--fs-1); font-weight: 700; font-family: var(--font-mono);
  display: flex; align-items: center; justify-content: center; flex-shrink: 0;
  border: 1px solid var(--accent-line);
}
.qa-rc-info { flex: 1; min-width: 0; }
.qa-rc-name {
  font-size: var(--fs-2); font-weight: 600; color: var(--text-1); margin-bottom: 3px;
  white-space: normal; overflow: hidden;
  display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical;
  word-break: break-word;
}
.qa-rc-meta {
  font-size: var(--fs-1); color: var(--text-3);
  font-family: var(--font-mono);
}

/* ═══ 操作按钮（使用 Aurora UI Button 组件） ═══ */
.qa-a-actions { display: flex; flex-wrap: wrap; gap: 6px; margin-top: 28px; }
.qa-act-btn {
  display: inline-flex; align-items: center; justify-content: center;
  gap: .5rem;
  height: 2rem; padding: 0 .875rem;
  border-radius: var(--r-sm);
  border: 1px solid var(--border);
  background: transparent;
  color: var(--text-3);
  font-size: var(--fs-2); font-weight: 500;
  cursor: pointer; 
  transition: transform var(--dur-2) var(--ease-spring),
              background-color var(--dur-2) var(--ease-out),
              border-color var(--dur-2) var(--ease-out),
              color var(--dur-2) var(--ease-out);
  font-family: 'Noto Sans SC', sans-serif;
}
.qa-act-btn:hover { 
  background: var(--accent-soft); 
  border-color: var(--accent-line);
  color: var(--accent-text);
  transform: translateY(-2px);
}
.qa-act-btn svg { width: 14px; height: 14px; }

/* ═══ Loading（使用 Aurora UI Dots 组件） ═══ */
.qa-loading-wrap {
  display: flex; align-items: center; gap: 10px; padding: 20px 0;
}
.qa-loading-dots { 
  display: inline-flex; gap: .25rem; 
}
.qa-loading-dots span {
  width: .375rem; height: .375rem; border-radius: 50%;
  background: var(--accent);
  animation: au-dotBounce 1.4s var(--ease-in-out) infinite both;
}
.qa-loading-dots span:nth-child(2) { animation-delay: .16s; }
.qa-loading-dots span:nth-child(3) { animation-delay: .32s; }
@keyframes au-dotBounce {
  0%, 80%, 100% { transform: scale(.6); opacity: .4; }
  40%           { transform: scale(1.15); opacity: 1; }
}
.qa-loading-text {
  font-size: var(--fs-2); color: var(--text-3);
  font-family: var(--font-mono);
}

/* ═══ 思考步骤时间线（使用 Aurora UI Timeline 组件） ═══ */
.qa-thinking-timeline { padding: 8px 0; }
.qa-step { 
  display: flex; gap: .875rem; padding: 8px 0; 
  opacity: 0.4; 
  transition: opacity var(--dur-2) var(--ease-out); 
}
.qa-step-active { opacity: 1; }
.qa-step-done { opacity: 1; }
.qa-step-dot {
  width: .9375rem; height: .9375rem; border-radius: 50%;
  background: var(--surface-3); 
  border: 2px solid var(--border-strong);
  flex-shrink: 0; margin-top: 3px;
  transition: all var(--dur-2) var(--ease-out); 
  position: relative;
}
.qa-step-active .qa-step-dot {
  background: linear-gradient(140deg, var(--grad-a), var(--grad-b));
  border-color: transparent;
  box-shadow: 0 0 0 .25rem var(--accent-soft), 0 0 12px -2px var(--accent-glow);
  animation: qa-stepPulse 1.5s ease-in-out infinite;
}
.qa-step-done .qa-step-dot { 
  background: var(--success); 
  border-color: transparent; 
}
.qa-step-content { flex: 1; min-width: 0; }
.qa-step-label { 
  font-size: var(--fs-2); font-weight: 600; 
  color: var(--text-1); margin-bottom: 2px; 
}
.qa-step-data { 
  font-size: var(--fs-2); color: var(--text-3); 
  line-height: 1.5; 
}
.qa-timeline-done { opacity: 0.6; }
.qa-timeline-done .qa-step { 
  border-left: 2px solid var(--success); 
  padding-left: 10px; margin-left: -1px; 
}
@keyframes qa-stepPulse {
  0%, 100% { box-shadow: 0 0 0 .25rem var(--accent-soft); }
  50% { box-shadow: 0 0 0 .5rem var(--accent-soft); }
}

/* ═══ 底部追问输入栏（使用 Aurora UI Composer 组件） ═══ */
.qa-r-input {
  padding: 14px 28px 24px;
  background: linear-gradient(to top, var(--bg-base) 50%, transparent);
  flex-shrink: 0;
}
.qa-ri-wrap { max-width: 1280px; margin: 0 auto; }
.qa-ri-box {
  display: flex; align-items: flex-end; gap: 6px;
  background: var(--surface-2); 
  border: 1px solid var(--border);
  border-radius: var(--r-lg); 
  padding: 6px; 
  transition: border-color var(--dur-2) var(--ease-out),
              box-shadow var(--dur-3) var(--ease-out),
              transform var(--dur-2) var(--ease-out);
}
.qa-ri-box:hover {
  border-color: var(--border-strong);
  transform: translateY(-1px);
}
.qa-ri-box:focus-within {
  border-color: var(--accent);
  background: var(--surface);
  box-shadow: 0 0 0 .2rem var(--accent-soft),
              0 14px 34px -16px var(--accent-glow);
  transform: translateY(-2px);
}
.qa-ri-box textarea {
  flex: 1; background: none; border: none; outline: none;
  color: var(--text-1); font-size: var(--fs-2);
  font-family: 'Noto Sans SC', sans-serif;
  line-height: 1.5; padding: 10px 14px;
  resize: none; min-height: 40px; max-height: 140px;
}
.qa-ri-box textarea:focus { outline: none; border: none; box-shadow: none; }
.qa-ri-box textarea::placeholder { color: var(--text-4); }
.qa-ri-send {
  width: 46px; height: 46px; border-radius: var(--r-md);
  background: linear-gradient(180deg, var(--grad-a), var(--grad-b));
  border: none; cursor: pointer; flex-shrink: 0;
  display: flex; align-items: center; justify-content: center;
  transition: transform var(--dur-2) var(--ease-spring),
              box-shadow var(--dur-3) var(--ease-out);
  color: #fff;
  box-shadow: inset 0 1px 0 rgba(255,255,255,.24), 0 6px 18px -8px var(--accent-glow);
}
.qa-ri-send:hover { 
  transform: scale(1.06); 
  box-shadow: inset 0 1px 0 rgba(255,255,255,.32), 0 14px 30px -10px var(--accent-glow);
}
.qa-ri-send:disabled { opacity: 0.38; cursor: not-allowed; transform: none; box-shadow: none; }
.qa-ri-send svg { width: 19px; height: 19px; }

/* ═══ 引用标记tooltip（使用 Aurora UI 设计规范） ═══ */
.qa-cite-tooltip {
  position: fixed; z-index: 99999; 
  padding: 0; border-radius: var(--r-lg);
  background: var(--surface); 
  color: var(--text-1);
  font-size: var(--fs-2); 
  box-shadow: var(--shadow-lg), 0 0 0 1px var(--accent-line);
  pointer-events: auto; max-width: 380px; max-height: 320px;
  display: none; overflow: hidden;
  backdrop-filter: blur(24px) saturate(180%);
  -webkit-backdrop-filter: blur(24px) saturate(180%);
}
.qa-cite-tooltip-header {
  padding: 10px 14px 8px; 
  border-bottom: 1px solid var(--border);
  display: flex; align-items: center; gap: 8px; flex-shrink: 0;
}
.qa-cite-tooltip-icon {
  width: 28px; height: 28px; border-radius: var(--r-sm);
  background: var(--accent-soft);
  display: flex; align-items: center; justify-content: center; 
  font-size: var(--fs-2); flex-shrink: 0;
  border: 1px solid var(--accent-line);
}
.qa-cite-tooltip-title {
  font-weight: 600; font-size: var(--fs-2); color: var(--text-1);
  overflow: hidden; text-overflow: ellipsis; white-space: nowrap; flex: 1;
}
.qa-cite-tooltip-body {
  padding: 10px 14px; overflow-y: auto; max-height: 220px;
  line-height: 1.6; color: var(--text-2); font-size: var(--fs-1);
  word-break: break-all; white-space: pre-wrap;
}
.qa-cite-tooltip-body table { 
  border-collapse: collapse; width: 100%; margin: 4px 0; font-size: var(--fs-1); 
}
.qa-cite-tooltip-body th, .qa-cite-tooltip-body td { 
  border: 1px solid var(--border); padding: 3px 6px; text-align: left; 
}
.qa-cite-tooltip-body th { 
  background: var(--accent-soft); font-weight: 600; 
}
.qa-cite-tooltip-body ul, .qa-cite-tooltip-body ol { 
  padding-left: 18px; margin: 4px 0; 
}
.qa-cite-tooltip-body p { margin: 4px 0; }
.qa-cite-tooltip-footer {
  padding: 6px 14px 8px; 
  border-top: 1px solid var(--border);
  font-size: var(--fs-1); color: var(--text-4);
  display: flex; align-items: center; gap: 4px; flex-shrink: 0;
}
.qa-cite-tooltip-footer svg { width: 12px; height: 12px; }

/* ═══ 错误提示 ═══ */
.qa-a-body .qa-error { color: var(--rose, #ef4444) !important; }

/* ═══ 响应式 ═══ */
@media (max-width: 1000px) {
  .qa-r-main { padding: 28px 24px 120px; }
  .qa-ref-grid { grid-template-columns: 1fr; }
  .qa-back-fab { top: 1.75rem; }
}
@media (max-width: 600px) {
  .qa-home-bar { padding: 20px; }
  .qa-greeting { margin-bottom: 36px; }
  .qa-recent { display: none; }
  .qa-sug-chip { font-size: var(--fs-1); padding: 8px 14px; }
  .qa-back-fab { right: 1rem; padding: .4375rem .75rem; }
  .qa-turn-hint--next { bottom: 5.5rem; }
}