/* ═══════════════════════════════════════════════
   Deep Search — 对话式智能检索
   ═══════════════════════════════════════════════ */

/* ── 页面容器（全高对话布局） ── */
.ds-chat-page {
  display: flex;
  flex-direction: column;
  height: calc(100vh - 120px);
  min-height: 400px;
}

/* ── 顶部工具栏 ── */
.ds-chat-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 12px 0;
  border-bottom: 1px solid var(--border-subtle);
  flex-shrink: 0;
}
.ds-chat-title {
  font-size: var(--fs-2);
  font-weight: 600;
  color: var(--text-bright);
}
.ds-header-controls {
  display: flex;
  align-items: center;
  gap: 10px;
}
.ds-topk-select {
  padding: 5px 10px;
  border: 1px solid var(--border-default);
  border-radius: 6px;
  background: var(--bg-card);
  color: var(--text-primary);
  font-size: var(--fs-1);
  cursor: pointer;
  outline: none;
}

/* ── 对话消息区 ── */
.ds-chat-messages {
  flex: 1;
  overflow-y: auto;
  padding: 20px 0;
  scroll-behavior: smooth;
}

/* ── 欢迎页 ── */
.ds-chat-welcome {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  height: 100%;
  text-align: center;
  padding: 40px 20px;
}
.ds-welcome-icon {
  width: 64px;
  height: 64px;
  border-radius: 18px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 30px;
  background: linear-gradient(135deg, var(--accent), var(--accent-deep, var(--accent)));
  color: #fff;
  margin-bottom: 20px;
  box-shadow: 0 8px 32px rgba(var(--theme-accent-rgb, 74,158,142), 0.25);
}
.ds-welcome-title {
  font-size: var(--fs-4);
  font-weight: 700;
  color: var(--text-bright);
  margin-bottom: 8px;
}
.ds-welcome-desc {
  font-size: var(--fs-2);
  color: var(--text-secondary);
  margin-bottom: 32px;
}
.ds-welcome-hints {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 12px;
  max-width: 460px;
  width: 100%;
}
.ds-hint-card {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 14px 18px;
  border: 1px solid var(--border-default);
  border-radius: 12px;
  cursor: pointer;
  transition: all .2s;
  text-align: left;
  font-size: var(--fs-2);
  color: var(--text-primary);
  background: var(--bg-card);
}
.ds-hint-card:hover {
  border-color: var(--accent);
  background: var(--accent-bg);
  color: var(--accent);
}
.ds-hint-icon {
  font-size: var(--fs-2);
  flex-shrink: 0;
}

/* ── 消息气泡 ── */
.ds-msg {
  display: flex;
  gap: 12px;
  margin-bottom: 20px;
  animation: dsMsgIn .3s ease;
}
@keyframes dsMsgIn {
  from { opacity: 0; transform: translateY(8px); }
  to { opacity: 1; transform: translateY(0); }
}

/* 用户消息 */
.ds-msg-user {
  justify-content: flex-end;
}
.ds-msg-bubble-user {
  max-width: 70%;
  padding: 12px 18px;
  border-radius: 18px 18px 4px 18px;
  background: var(--accent);
  color: #fff;
  font-size: var(--fs-2);
  line-height: 1.6;
  word-break: break-word;
}

/* AI消息 */
.ds-msg-ai {
  align-items: flex-start;
}
.ds-msg-avatar {
  width: 36px;
  height: 36px;
  border-radius: 10px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: var(--fs-3);
  background: var(--accent-bg);
  flex-shrink: 0;
}
.ds-msg-body {
  flex: 1;
  min-width: 0;
}
.ds-msg-bubble-ai {
  max-width: 100%;
  padding: 16px 20px;
  border-radius: 4px 18px 18px 18px;
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
}
.ds-ai-summary {
  font-size: var(--fs-2);
  line-height: 1.6;
  color: var(--text-primary);
  margin-bottom: 12px;
}
.ds-ai-summary strong {
  color: var(--accent);
  font-weight: 600;
}

/* ── 打字动画 ── */
.ds-typing-dots {
  display: flex;
  gap: 4px;
  padding: 4px 0;
}
.ds-typing-dots span {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--text-ghost);
  animation: dsBounce 1.4s infinite ease-in-out both;
}
.ds-typing-dots span:nth-child(1) { animation-delay: -0.32s; }
.ds-typing-dots span:nth-child(2) { animation-delay: -0.16s; }
@keyframes dsBounce {
  0%, 80%, 100% { transform: scale(0); }
  40% { transform: scale(1); }
}

/* ── 搜索结果卡片（嵌在AI回复中） ── */
.ds-result-list {
  display: flex;
  flex-direction: column;
  gap: 8px;
  margin-top: 8px;
}
.ds-result-card {
  padding: 14px 16px;
  border-radius: 10px;
  cursor: pointer;
  transition: all .2s;
  background: var(--bg-surface);
  border: 1px solid var(--border-subtle);
}
.ds-result-card:hover {
  border-color: var(--accent);
  box-shadow: 0 2px 12px rgba(0,0,0,0.04);
}
.ds-result-top {
  display: flex;
  align-items: center;
  gap: 10px;
}
.ds-result-icon {
  width: 32px;
  height: 32px;
  border-radius: 8px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: var(--fs-2);
  background: var(--accent-bg);
  flex-shrink: 0;
}
.ds-result-info {
  flex: 1;
  min-width: 0;
}
.ds-result-name {
  font-size: var(--fs-2);
  font-weight: 600;
  color: var(--text-bright);
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}
.ds-result-meta {
  display: flex;
  align-items: center;
  gap: 6px;
  font-size: var(--fs-1);
  color: var(--text-ghost);
  margin-top: 2px;
}
.ds-result-score {
  padding: 3px 10px;
  background: var(--accent-bg);
  color: var(--accent);
  border-radius: 16px;
  font-size: var(--fs-1);
  font-weight: 600;
  font-family: var(--font-body);
  white-space: nowrap;
  flex-shrink: 0;
}
.ds-result-snippet {
  font-size: var(--fs-2);
  line-height: 1.6;
  color: var(--text-secondary);
  margin-top: 8px;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}
.ds-result-snippet mark {
  background: var(--highlight-bg);
  color: var(--highlight);
  padding: 1px 3px;
  border-radius: 3px;
  font-weight: 500;
}

/* ── 底部输入区 ── */
.ds-chat-input-bar {
  display: flex;
  align-items: flex-end;
  gap: 10px;
  padding: 16px 0;
  border-top: 1px solid var(--border-subtle);
  flex-shrink: 0;
}
.ds-chat-textarea {
  flex: 1;
  padding: 12px 16px;
  border: 1.5px solid var(--field-border);
  border-radius: 14px;
  background: var(--field-bg);
  color: var(--field-ink);
  font-size: var(--fs-2);
  line-height: 1.5;
  resize: none;
  outline: none;
  max-height: 120px;
  font-family: inherit;
  transition: border-color .2s;
}
.ds-chat-textarea::placeholder {
  color: var(--text-ghost);
  font-size: var(--fs-2);
}
.ds-chat-textarea:focus {
  border-color: var(--accent);
}
.ds-chat-send {
  width: 42px;
  height: 42px;
  border: none;
  border-radius: 12px;
  background: var(--accent);
  color: #fff;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all .2s;
  flex-shrink: 0;
}
.ds-chat-send:hover {
  background: var(--accent-hover);
  transform: scale(1.05);
}
.ds-chat-send svg {
  width: 18px;
  height: 18px;
  color: #fff;
  transform: rotate(-45deg);
}

/* ── 响应式 ── */
@media (max-width: 768px) {
  .ds-chat-header { flex-wrap: wrap; gap: 8px; }
  .ds-header-controls { flex-wrap: wrap; gap: 6px; }
  .ds-msg-bubble-user { max-width: 85%; }
  .ds-welcome-hints { grid-template-columns: 1fr; }
  .ds-hint-card { padding: 10px 14px; }
}

/* ═══════════════════════════════════════════════
   Q&A — 智能问答页面
   ═══════════════════════════════════════════════ */

/* ═══════════════════════════════════════════════
   Q&A 三栏布局
   ═══════════════════════════════════════════════ */
.qa-page { height: calc(100vh - 120px); display: flex; flex-direction: column; }
.qa-layout { display: flex; flex: 1; gap: 0; overflow: hidden; border: 1px solid var(--border-default); border-radius: 14px; background: var(--bg-card); }

/* 左侧历史面板 */
.qa-history-panel { width: 240px; flex-shrink: 0; display: flex; flex-direction: column; border-right: 1px solid var(--border-default); background: var(--bg-card); }
.qa-history-header { display: flex; align-items: center; justify-content: space-between; padding: 14px 16px; border-bottom: 1px solid var(--border-default); font-size: var(--fs-2); font-weight: 600; color: var(--text-primary); }
.qa-history-list { flex: 1; overflow-y: auto; padding: 8px; }
.qa-history-empty { display: flex; align-items: center; justify-content: center; height: 100%; color: var(--text-tertiary); font-size: var(--fs-2); }
.qa-history-item { padding: 10px 12px; border-radius: 8px; cursor: pointer; margin-bottom: 4px; transition: all .15s; position: relative; }
.qa-history-item:hover { background: var(--bg-base); }
.qa-history-item-active { background: rgba(var(--accent-rgb,99,102,241),.1); border-left: 3px solid var(--accent); }
.qa-history-item-title { font-size: var(--fs-2); color: var(--text-primary); overflow: hidden; text-overflow: ellipsis; white-space: nowrap; padding-right: 20px; }
.qa-history-item-time { font-size: var(--fs-1); color: var(--text-tertiary); margin-top: 3px; }
.qa-history-item-del { position: absolute; top: 8px; right: 8px; background: none; border: none; color: var(--text-tertiary); cursor: pointer; font-size: var(--fs-2); line-height: 1; opacity: 0; transition: opacity .15s; }
.qa-history-item:hover .qa-history-item-del { opacity: 1; }
.qa-history-item-del:hover { color: #ef4444; }

/* 中间对话面板 */
.qa-conversation-panel { flex: 1; display: flex; flex-direction: column; min-width: 0; }
.qa-conv-header { padding: 14px 20px; border-bottom: 1px solid var(--border-default); }
.qa-conv-title { font-size: var(--fs-2); font-weight: 600; color: var(--text-primary); }
.qa-conv-messages { flex: 1; overflow-y: auto; padding: 20px; scroll-behavior: smooth; }

/* 欢迎页 */
.qa-welcome { display: flex; flex-direction: column; align-items: center; justify-content: center; height: 100%; text-align: center; color: var(--text-secondary); padding: 40px; }
.qa-welcome-icon { font-size: 48px; margin-bottom: 16px; }
.qa-welcome h3 { font-size: var(--fs-3); font-weight: 600; color: var(--text-primary); margin: 0 0 8px; }
.qa-welcome p { font-size: var(--fs-2); line-height: 1.6; margin: 0 0 24px; }
.qa-hints { display: flex; flex-wrap: wrap; gap: 8px; justify-content: center; }
.qa-hint-card { padding: 8px 16px; border-radius: 8px; font-size: var(--fs-2); background: var(--bg-base); border: 1px solid var(--border-default); color: var(--text-secondary); cursor: pointer; transition: all .2s; }
.qa-hint-card:hover { border-color: var(--accent); color: var(--accent); background: rgba(var(--accent-rgb,99,102,241),.05); }

/* 消息 */
.qa-message { margin-bottom: 16px; max-width: 85%; display: flex; align-items: flex-start; gap: 10px; }
.qa-user-msg { margin-left: auto; flex-direction: row-reverse; }
.qa-user-msg .qa-msg-text { background: var(--accent); color: #fff; border-radius: 14px 14px 4px 14px; padding: 10px 16px; font-size: var(--fs-2); line-height: 1.6; display: inline-block; }
.qa-ai-msg .qa-msg-text { background: var(--bg-base); border: 1px solid var(--border-default); border-radius: 14px 14px 14px 4px; padding: 16px 20px; font-size: var(--fs-2); line-height: 1.8; color: var(--text-primary); }
.qa-msg-body { flex: 1; min-width: 0; }
/* 头像样式 */
.qa-avatar { width: 36px; height: 36px; border-radius: 50%; flex-shrink: 0; display: flex; align-items: center; justify-content: center; font-size: var(--fs-3); }
.qa-avatar-user { background: linear-gradient(135deg, var(--accent), var(--accent-deep, #6366f1)); color: #fff; font-weight: 600; font-size: var(--fs-2); }
.qa-avatar-initial { font-size: var(--fs-2); font-weight: 600; }
.qa-avatar-ai { background: var(--bg-base); border: 1px solid var(--border-default); }
.qa-avatar-user img { width: 100%; height: 100%; border-radius: 50%; object-fit: cover; }
.qa-msg-meta { font-size: var(--fs-1); color: var(--text-tertiary); margin-top: 6px; padding-left: 4px; }
.qa-error { color: #ef4444 !important; }

/* 引用标记 */
.qa-citation-mark { display: inline-block; padding: 0 4px; border-radius: 4px; background: rgba(var(--accent-rgb,99,102,241),.12); color: var(--accent); font-weight: 600; font-size: var(--fs-1); cursor: pointer; transition: all .2s; vertical-align: baseline; position: relative; top: -1px; }
.qa-citation-mark:hover, .qa-citation-mark-active { background: var(--accent); color: #fff; transform: scale(1.1); }

/* 思考过程时间线 */
.qa-thinking-timeline { padding: 8px 0; }
.qa-step { display: flex; gap: 12px; padding: 8px 0; opacity: 0.4; transition: all .3s; }
.qa-step-active { opacity: 1; }
.qa-step-done { opacity: 1; }
.qa-step-dot { width: 12px; height: 12px; border-radius: 50%; background: var(--border-default); flex-shrink: 0; margin-top: 3px; transition: all .3s; position: relative; }
.qa-step-active .qa-step-dot { background: var(--accent); box-shadow: 0 0 0 4px rgba(var(--accent-rgb,99,102,241),.2); animation: stepPulse 1.5s ease-in-out infinite; }
.qa-step-done .qa-step-dot { background: #22c55e; }
.qa-step-content { flex: 1; min-width: 0; }
.qa-step-label { font-size: var(--fs-2); font-weight: 600; color: var(--text-primary); margin-bottom: 2px; }
.qa-step-data { font-size: var(--fs-1); color: var(--text-secondary); line-height: 1.5; }
.qa-timeline-done { opacity: 0.6; }
.qa-timeline-done .qa-step { border-left: 2px solid #22c55e; padding-left: 10px; margin-left: -1px; }
@keyframes stepPulse { 0%,100% { box-shadow: 0 0 0 4px rgba(var(--accent-rgb,99,102,241),.2); } 50% { box-shadow: 0 0 0 8px rgba(var(--accent-rgb,99,102,241),.08); } }
@keyframes qaAnswerIn { from { opacity:0; transform:translateY(12px); } to { opacity:1; transform:translateY(0); } }

/* 输入区 */
.qa-input-bar { display: flex; align-items: flex-end; gap: 10px; padding: 12px 16px; border-top: 1px solid var(--border-default); background: var(--bg-card); }
.qa-textarea { flex: 1; resize: none; border: 1px solid var(--field-border); border-radius: 10px; padding: 10px 14px; font-size: var(--fs-2); line-height: 1.5; max-height: 120px; background: var(--field-bg); color: var(--field-ink); font-family: inherit; outline: none; transition: border-color .2s; }
.qa-textarea:focus { border-color: var(--accent); }

/* 右侧引用面板 */
.qa-citation-panel { width: 340px; flex-shrink: 0; display: flex; flex-direction: column; background: var(--bg-card); border-left: 1px solid var(--border-default); }
.qa-citation-header { display: flex; align-items: center; justify-content: space-between; padding: 14px 16px; border-bottom: 1px solid var(--border-default); font-size: var(--fs-2); font-weight: 600; color: var(--text-primary); }
.qa-citation-count { background: var(--accent); color: #fff; border-radius: 10px; padding: 2px 8px; font-size: var(--fs-1); font-weight: 600; }
.qa-citation-list { flex: 1; overflow-y: auto; padding: 12px; display: flex; flex-direction: column; gap: 10px; scroll-behavior: smooth; }
.qa-citation-empty { display: flex; align-items: center; justify-content: center; height: 100%; color: var(--text-tertiary); font-size: var(--fs-2); }

/* 引用卡片 */
.qa-citation-card { padding: 12px; border-radius: 10px; border: 1px solid var(--border-default); background: var(--bg-base); cursor: pointer; transition: all .3s cubic-bezier(.4,0,.2,1); transform-style: preserve-3d; perspective: 800px; position: relative; }
.qa-citation-card:hover { border-color: var(--accent); transform: translateY(-2px) rotateX(2deg); box-shadow: 0 4px 16px rgba(var(--accent-rgb,99,102,241),.15), 0 8px 32px rgba(0,0,0,.08); }
.qa-citation-card-active {
  border-color: var(--accent) !important;
  transform: translateY(-8px) translateZ(20px) rotateX(3deg) rotateY(-1deg) scale(1.03) !important;
  box-shadow:
    0 0 0 2px rgba(var(--accent-rgb,99,102,241),.2),
    0 4px 12px rgba(var(--accent-rgb,99,102,241),.2),
    0 12px 40px rgba(0,0,0,.12),
    0 20px 60px rgba(0,0,0,.06) !important;
  z-index: 10;
}
.qa-citation-card-active::before {
  content: ''; position: absolute; left: 0; top: 8px; bottom: 8px; width: 3px;
  background: var(--accent); border-radius: 2px;
  box-shadow: 0 0 8px var(--accent), 0 0 16px rgba(var(--accent-rgb,99,102,241),.3);
  animation: cardGlow 2s ease-in-out infinite;
}
.qa-citation-card-active::after {
  content: ''; position: absolute; inset: -1px; border-radius: 11px;
  background: linear-gradient(135deg, rgba(var(--accent-rgb,99,102,241),.08), transparent 60%);
  pointer-events: none;
}
@keyframes cardGlow { 0%,100% { opacity: 1; } 50% { opacity: 0.5; } }

.qa-citation-card-header { display: flex; align-items: center; gap: 8px; margin-bottom: 8px; }
.qa-citation-num { font-size: var(--fs-1); font-weight: 700; color: var(--accent); background: rgba(var(--accent-rgb,99,102,241),.1); padding: 2px 6px; border-radius: 4px; }
.qa-citation-fname { font-size: var(--fs-2); font-weight: 600; color: var(--text-primary); flex: 1; word-break: break-all; white-space: normal; line-height: 1.4; }
.qa-citation-indices { display: flex; flex-wrap: wrap; gap: 4px; margin-bottom: 8px; }
.qa-citation-indices .qa-citation-num { cursor: pointer; transition: all .15s; }
.qa-citation-indices .qa-citation-num:hover { background: var(--accent); color: #fff; transform: scale(1.1); }
.qa-citation-snippet { font-size: var(--fs-1); line-height: 1.5; color: var(--text-secondary); display: -webkit-box; -webkit-line-clamp: 3; -webkit-box-orient: vertical; overflow: hidden; margin-bottom: 8px; word-break: break-all; }
.qa-citation-snippet table, .qa-cite-tooltip-body table { border-collapse: collapse; width: 100%; margin: 4px 0; font-size: var(--fs-1); }
.qa-citation-snippet th, .qa-citation-snippet td, .qa-cite-tooltip-body th, .qa-cite-tooltip-body td { border: 1px solid var(--border-default); padding: 3px 6px; text-align: left; }
.qa-citation-snippet th, .qa-cite-tooltip-body th { background: rgba(var(--accent-rgb,99,102,241),.08); font-weight: 600; }
.qa-citation-snippet ul, .qa-citation-snippet ol, .qa-cite-tooltip-body ul, .qa-cite-tooltip-body ol { padding-left: 18px; margin: 4px 0; }
.qa-citation-snippet p, .qa-cite-tooltip-body p { margin: 4px 0; }
.qa-citation-card-footer { display: flex; justify-content: space-between; font-size: var(--fs-1); color: var(--text-tertiary); }
.qa-citation-score { font-weight: 600; color: var(--accent); }

/* 引用标记浮层 */
.qa-cite-tooltip {
  position: fixed; z-index: 9999; padding: 0; border-radius: 12px;
  background: var(--bg-elevated, #1e1e2e); color: var(--text-primary);
  font-size: var(--fs-1); box-shadow: 0 8px 32px rgba(0,0,0,.35), 0 2px 8px rgba(0,0,0,.2), 0 0 0 1px rgba(var(--accent-rgb,99,102,241),.15);
  pointer-events: auto; max-width: 380px; max-height: 320px;
  animation: tooltip3dIn .25s cubic-bezier(.4,0,.2,1);
  transform-origin: top center;
  overflow: hidden;
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
}
.qa-cite-tooltip-header {
  padding: 10px 14px 8px; border-bottom: 1px solid var(--border-default);
  display: flex; align-items: center; gap: 8px; flex-shrink: 0;
}
.qa-cite-tooltip-header .qa-cite-tooltip-icon {
  width: 28px; height: 28px; border-radius: 6px; background: rgba(var(--accent-rgb,99,102,241),.12);
  display: flex; align-items: center; justify-content: center; font-size: var(--fs-2); flex-shrink: 0;
}
.qa-cite-tooltip-header .qa-cite-tooltip-title {
  font-weight: 600; font-size: var(--fs-2); color: var(--text-bright);
  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-secondary); font-size: var(--fs-1);
  word-break: break-all; white-space: pre-wrap;
  scrollbar-width: thin; scrollbar-color: rgba(var(--accent-rgb,99,102,241),.3) transparent;
}
.qa-cite-tooltip-body::-webkit-scrollbar { width: 4px; }
.qa-cite-tooltip-body::-webkit-scrollbar-track { background: transparent; }
.qa-cite-tooltip-body::-webkit-scrollbar-thumb { background: rgba(var(--accent-rgb,99,102,241),.3); border-radius: 2px; }
.qa-cite-tooltip-footer {
  padding: 6px 14px 8px; border-top: 1px solid var(--border-default);
  font-size: var(--fs-1); color: var(--text-tertiary); display: flex; align-items: center; gap: 4px; flex-shrink: 0;
}
.qa-cite-tooltip-footer svg { width: 12px; height: 12px; }
@keyframes tooltip3dIn {
  from { opacity: 0; transform: perspective(600px) rotateX(-8deg) translateY(8px) scale(.95); }
  to   { opacity: 1; transform: perspective(600px) rotateX(0deg) translateY(0) scale(1); }
}

/* 响应式 */
@media (max-width: 1100px) { .qa-history-panel { width: 200px; } }
@media (max-width: 900px) {
  .qa-layout { flex-direction: column; }
  .qa-history-panel { width: 100%; max-height: 120px; border-right: none; border-bottom: 1px solid var(--border-default); }
  .qa-citation-panel { width: 100%; max-height: 40vh; border-top: 1px solid var(--border-default); border-left: none; }
}