/* ===== Spin Animation ===== */
@keyframes spin-icon-rotate {
  from { transform: rotate(0deg); }
  to { transform: rotate(360deg); }
}

.spin-icon {
  animation: spin-icon-rotate 0.8s linear infinite;
}

/* ===== Chat Page Layout ===== */
.chat-page {
  display: flex;
  height: 100%;
  overflow: hidden;
}

/* ===== Left Sidebar ===== */
.chat-sidebar {
  width: 280px;
  min-width: 280px;
  background: var(--color-sidebar-bg);
  border-right: 1px solid var(--color-border-light);
  display: flex;
  flex-direction: column;
  overflow: hidden;
}

.chat-sidebar-header {
  padding: var(--space-lg);
  border-bottom: 1px solid var(--color-border-light);
}

.new-chat-btn {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-sm);
  width: 100%;
  padding: var(--space-md) var(--space-lg);
  background: var(--color-accent);
  color: var(--color-text-inverse);
  border: none;
  border-radius: var(--radius-md);
  font-size: var(--text-base);
  font-weight: 600;
  cursor: pointer;
  transition: background var(--transition-fast), transform var(--transition-fast);
}

.new-chat-btn:hover {
  background: var(--color-accent-hover);
}

.new-chat-btn:active {
  transform: scale(0.98);
}

/* Search */
.chat-sidebar-search {
  padding: var(--space-md) var(--space-lg);
  position: relative;
}

.search-icon-wrap {
  position: absolute;
  left: calc(var(--space-lg) + var(--space-md));
  top: 50%;
  transform: translateY(-50%);
  display: flex;
  align-items: center;
  color: var(--color-text-tertiary);
  pointer-events: none;
}

.search-input {
  width: 100%;
  padding: var(--space-sm) var(--space-md) var(--space-sm) calc(var(--space-2xl) + var(--space-sm));
  background: var(--color-bg-secondary);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  font-size: var(--text-sm);
  color: var(--color-text-primary);
  outline: none;
  transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
}

.search-input::placeholder {
  color: var(--color-text-disabled);
}

.search-input:focus {
  border-color: var(--color-accent);
  box-shadow: 0 0 0 3px var(--color-accent-light);
}

/* Conversation List */
.chat-sidebar-list {
  flex: 1;
  overflow-y: auto;
  padding: var(--space-sm) var(--space-sm);
}

.conversation-item {
  padding: var(--space-md) var(--space-md);
  border-radius: var(--radius-md);
  cursor: pointer;
  transition: background var(--transition-fast);
  margin-bottom: 2px;
  position: relative;
}

.conversation-item:hover {
  background: var(--color-sidebar-hover);
}

.conversation-item.active {
  background: var(--color-sidebar-active);
}

.conversation-item.active .conv-title {
  color: var(--color-accent);
  font-weight: 600;
}

.conv-top {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-xs);
  margin-bottom: 4px;
}

.conv-pin-icon {
  display: flex;
  align-items: center;
  color: var(--color-accent);
  flex-shrink: 0;
  transform: rotate(45deg);
}

.conversation-item.pinned {
  background: var(--color-accent-subtle);
  border-left: 3px solid var(--color-accent);
}

.conversation-item.pinned:hover {
  background: var(--color-accent-light);
}

.conversation-item.pinned.active {
  background: var(--color-sidebar-active);
  border-left-color: var(--color-accent);
}

.conv-title {
  font-size: var(--text-sm);
  font-weight: 500;
  color: var(--color-text-primary);
  flex: 1;
  min-width: 0;
  line-height: 1.4;
}

.conv-more-btn {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 28px;
  height: 28px;
  border-radius: var(--radius-sm);
  color: var(--color-text-tertiary);
  cursor: pointer;
  opacity: 0.5;
  transition: opacity var(--transition-fast), background var(--transition-fast), color var(--transition-fast);
  flex-shrink: 0;
}

.conversation-item:hover .conv-more-btn {
  opacity: 1;
  color: var(--color-text-secondary);
}

.conv-more-btn:hover {
  background: var(--color-bg-tertiary);
  color: var(--color-accent);
}

.conv-preview {
  font-size: var(--text-xs);
  color: var(--color-text-tertiary);
  line-height: 1.4;
  margin-bottom: 4px;
}

.conv-meta {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
}

.conv-time {
  font-size: 11px;
  color: var(--color-text-disabled);
}

.conv-badge {
  font-size: 10px;
  color: var(--color-warning);
  background: var(--color-warning-light);
  padding: 1px 6px;
  border-radius: var(--radius-full);
  font-weight: 500;
}

.conv-empty {
  padding: var(--space-2xl) var(--space-lg);
  text-align: center;
  color: var(--color-text-tertiary);
  font-size: var(--text-sm);
}

/* ===== Right Main Area ===== */
.chat-main {
  flex: 1;
  display: flex;
  flex-direction: column;
  min-width: 0;
  background: var(--color-bg-primary);
  overflow: hidden;
}

/* Chat Header */
.chat-header {
  height: 52px;
  min-height: 52px;
  padding: 0 var(--space-xl);
  display: flex;
  align-items: center;
  justify-content: space-between;
  background: var(--color-bg-secondary);
  border-bottom: 1px solid var(--color-border-light);
}

.chat-header-left {
  display: flex;
  align-items: center;
  gap: var(--space-md);
  min-width: 0;
}

.model-selector {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  padding: var(--space-xs) var(--space-md);
  background: var(--color-bg-tertiary);
  border-radius: var(--radius-md);
  cursor: pointer;
  font-size: var(--text-sm);
  color: var(--color-text-secondary);
  transition: background var(--transition-fast);
  white-space: nowrap;
  flex-shrink: 0;
}

.model-selector:hover {
  background: var(--color-bg-hover);
}

.model-name {
  font-weight: 500;
  color: var(--color-text-primary);
}

.model-badge {
  font-size: 10px;
  color: var(--color-accent);
  background: var(--color-accent-light);
  padding: 1px 6px;
  border-radius: var(--radius-full);
  font-weight: 600;
}

.chat-header-divider {
  width: 1px;
  height: 20px;
  background: var(--color-border);
  flex-shrink: 0;
}

.chat-title {
  font-size: var(--text-base);
  font-weight: 500;
  color: var(--color-text-primary);
  min-width: 0;
}

/* Messages Area */
.chat-messages {
  flex: 1;
  overflow-y: auto;
  padding: var(--space-xl);
  display: flex;
  flex-direction: column;
  gap: var(--space-lg);
}

.chat-empty-state,
.chat-empty-full {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  height: 100%;
  color: var(--color-text-tertiary);
  gap: var(--space-md);
  user-select: none;
}

.empty-title {
  font-size: var(--text-lg);
  font-weight: 600;
  color: var(--color-text-secondary);
}

.empty-desc {
  font-size: var(--text-sm);
  color: var(--color-text-tertiary);
}

/* Message Row */
.message-row {
  display: flex;
  flex-direction: column;
  max-width: 75%;
  animation: fadeIn var(--transition-normal);
}

.message-row.user {
  align-self: flex-end;
  align-items: flex-end;
}

.message-row.assistant {
  align-self: flex-start;
  align-items: flex-start;
}

/* Message Bubble */
.message-bubble {
  padding: var(--space-md) var(--space-lg);
  border-radius: var(--radius-lg);
  font-size: var(--text-base);
  line-height: 1.7;
  word-break: break-word;
}

.message-bubble.user {
  background: var(--color-accent);
  color: var(--color-text-inverse);
  border-bottom-right-radius: var(--radius-sm);
}

.message-bubble.assistant {
  background: var(--color-bg-secondary);
  color: var(--color-text-primary);
  border: 1px solid var(--color-border-light);
  border-bottom-left-radius: var(--radius-sm);
  box-shadow: var(--shadow-xs);
}

/* Message Meta */
.message-meta {
  display: flex;
  gap: var(--space-sm);
  padding: 4px var(--space-sm) 0;
  font-size: 11px;
  color: var(--color-text-disabled);
}

.message-meta.user {
  justify-content: flex-end;
}

/* Markdown Rendering */
.markdown-body {
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.message-bubble.user .markdown-body {
  gap: 4px;
}

.md-code-block {
  background: rgba(0, 0, 0, 0.08);
  border-radius: var(--radius-sm);
  padding: var(--space-md);
  overflow-x: auto;
  font-family: var(--font-mono);
  font-size: var(--text-sm);
  line-height: 1.5;
  margin: 4px 0;
}

.message-bubble.user .md-code-block {
  background: rgba(255, 255, 255, 0.15);
}

.md-inline-code {
  background: rgba(0, 0, 0, 0.07);
  padding: 1px 5px;
  border-radius: 3px;
  font-family: var(--font-mono);
  font-size: var(--text-sm);
}

.message-bubble.user .md-inline-code {
  background: rgba(255, 255, 255, 0.15);
}

.md-h2 {
  font-size: var(--text-lg);
  font-weight: 700;
  margin-top: 8px;
  color: inherit;
}

.md-h3 {
  font-size: var(--text-md);
  font-weight: 600;
  margin-top: 6px;
  color: inherit;
}

.md-h4 {
  font-size: var(--text-base);
  font-weight: 600;
  color: inherit;
}

.md-li {
  margin-left: 1.2em;
  line-height: 1.6;
}

.md-table {
  width: 100%;
  border-collapse: collapse;
  margin: 12px 0;
  font-size: var(--text-sm);
  background: #fff;
  border-radius: var(--radius-md);
  overflow: hidden;
  box-shadow: 0 1px 3px rgba(0, 0, 0, 0.06);
}

.md-table thead {
  background: linear-gradient(135deg, #5B5FED 0%, #7B7FEE 100%);
  color: #fff;
}

.md-table th {
  padding: 10px 14px;
  font-weight: 600;
  text-align: left;
  font-size: var(--text-xs);
  letter-spacing: 0.3px;
}

.md-table td {
  padding: 8px 12px;
  border-bottom: 1px solid #EEF0F4;
  color: var(--color-text-primary);
  vertical-align: top;
  line-height: 1.5;
}

.md-table td br {
  line-height: 0.8;
}

.md-table tbody tr:last-child td {
  border-bottom: none;
}

.md-table tbody tr:hover {
  background: #F8F9FC;
}

.md-table tbody tr:nth-child(even) {
  background: #FAFBFD;
}

.md-table tbody tr:nth-child(even):hover {
  background: #F0F2F7;
}

.message-bubble.user .md-table {
  background: rgba(255, 255, 255, 0.08);
  color: inherit;
}
.message-bubble.user .md-table th,
.message-bubble.user .md-table td {
  color: inherit;
  border-color: rgba(255, 255, 255, 0.15);
}
.message-bubble.user .md-table tbody tr:hover,
.message-bubble.user .md-table tbody tr:nth-child(even) {
  background: rgba(255, 255, 255, 0.05);
}

/* 数学公式 */
.md-math-block {
  display: block;
  overflow-x: auto;
  padding: 10px 0;
  text-align: center;
}
.md-math-inline {
  display: inline;
  padding: 0 2px;
}

/* Mermaid 图表 */
.md-mermaid {
  display: flex;
  justify-content: center;
  margin: 16px 0;
  padding: 12px;
  background: #f8f9fb;
  border-radius: var(--radius-lg);
  border: 1px solid var(--color-border);
  overflow-x: auto;
}
.md-mermaid-rendered svg {
  max-width: 100%;
  height: auto;
}

/* 代码块包装器 + 复制按钮 */
.md-code-wrapper {
  position: relative;
  margin: 12px 0;
}
.md-code-wrapper .md-code-block {
  margin: 0;
  border-radius: var(--radius-md);
}
.md-code-copy {
  position: absolute;
  top: 8px;
  right: 8px;
  padding: 4px 10px;
  font-size: 12px;
  color: #6B7280;
  background: #F3F4F6;
  border: 1px solid #E5E7EB;
  border-radius: 4px;
  cursor: pointer;
  opacity: 0;
  transition: opacity 0.2s;
  z-index: 2;
}
.md-code-wrapper:hover .md-code-copy {
  opacity: 1;
}

/* 删除线 */
del {
  text-decoration: line-through;
  opacity: 0.6;
}

.md-hr {
  border: none;
  border-top: 1px solid var(--color-border);
  margin: 8px 0;
}

.message-bubble.user .md-hr {
  border-color: rgba(255, 255, 255, 0.2);
}

.message-bubble.user .md-code-block {
  background: rgba(0, 0, 0, 0.2);
}

/* ===== Input Area ===== */
.chat-input-area {
  padding: var(--space-md) var(--space-xl) var(--space-xl);
  background: var(--color-bg-primary);
  overflow: visible;
}

.chat-input-container {
  background: var(--color-bg-secondary);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: var(--space-sm);
  transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
}

.chat-input-container:focus-within {
  border-color: var(--color-accent);
  box-shadow: 0 0 0 3px var(--color-accent-light);
}

.input-attachments {
  display: flex;
  gap: 4px;
  padding: 0 var(--space-sm) 4px;
}

.attach-btn {
  display: flex;
  align-items: center;
  gap: 4px;
  padding: 4px 10px;
  border-radius: var(--radius-sm);
  font-size: var(--text-xs);
  color: var(--color-text-secondary);
  background: var(--color-bg-tertiary);
  border: 1px solid var(--color-border);
  cursor: pointer;
  transition: all var(--transition-fast);
  font-weight: 500;
}

.attach-btn:hover {
  background: var(--color-accent-subtle);
  border-color: var(--color-accent);
  color: var(--color-accent);
}

.input-row {
  display: flex;
  align-items: flex-end;
  gap: var(--space-sm);
  padding: 0 var(--space-sm);
}

.chat-textarea {
  flex: 1;
  border: none;
  outline: none;
  resize: none;
  font-size: var(--text-base);
  line-height: 1.6;
  color: var(--color-text-primary);
  background: transparent;
  padding: var(--space-xs) 0;
  max-height: 160px;
  font-family: var(--font-sans);
}

.chat-textarea::placeholder {
  color: var(--color-text-disabled);
}

.send-btn {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 34px;
  height: 34px;
  border-radius: var(--radius-md);
  background: var(--color-accent);
  color: var(--color-text-inverse);
  border: none;
  cursor: pointer;
  transition: all var(--transition-fast);
  flex-shrink: 0;
  margin-bottom: 2px;
}

.send-btn:hover:not(:disabled) {
  background: var(--color-accent-hover);
  transform: scale(1.05);
}

.send-btn:active:not(:disabled) {
  transform: scale(0.95);
}

.send-btn:disabled {
  background: var(--color-bg-tertiary);
  color: var(--color-text-disabled);
  cursor: not-allowed;
}

/* ===== Dropdown ===== */
.dropdown-wrapper {
  position: relative;
  display: inline-flex;
}

.dropdown-trigger {
  cursor: pointer;
}

.dropdown-menu {
  position: absolute;
  top: calc(100% + 4px);
  z-index: 9999;
  background: var(--color-bg-secondary);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-lg);
  padding: var(--space-xs);
  min-width: 180px;
  max-height: 320px;
  overflow-y: auto;
  animation: fadeIn var(--transition-fast);
}

/* Upward-opening dropdown for bottom-of-page elements */
.dropdown-menu.dropup {
  top: auto;
  bottom: calc(100% + 4px);
}

.dropdown-menu.align-left {
  left: 0;
}

.dropdown-menu.align-right {
  right: 0;
}

.dropdown-item {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  width: 100%;
  padding: var(--space-sm) var(--space-md);
  border-radius: var(--radius-sm);
  font-size: var(--text-sm);
  color: var(--color-text-secondary);
  background: none;
  border: none;
  cursor: pointer;
  transition: background var(--transition-fast);
  text-align: left;
  white-space: nowrap;
}

.dropdown-item:hover {
  background: var(--color-bg-hover);
  color: var(--color-text-primary);
}

.dropdown-item.selected {
  color: var(--color-accent);
  background: var(--color-accent-subtle);
  font-weight: 500;
}

.dropdown-item.danger {
  color: var(--color-error);
}

.dropdown-item.danger:hover {
  background: var(--color-error-light);
}

.dropdown-item.disabled {
  color: var(--color-text-disabled);
  cursor: default;
  pointer-events: none;
}

.dropdown-divider {
  height: 1px;
  background: var(--color-border-light);
  margin: var(--space-xs) 0;
}

.model-dropdown-item {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  width: 100%;
}

.model-provider-tag {
  font-size: 10px;
  color: var(--color-text-tertiary);
  margin-left: auto;
  background: var(--color-bg-tertiary);
  padding: 1px 6px;
  border-radius: var(--radius-full);
}

.attach-dropdown-title {
  padding: var(--space-xs) var(--space-md) var(--space-sm);
  font-size: 11px;
  font-weight: 600;
  color: var(--color-text-tertiary);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.attach-count {
  margin-left: auto;
  font-size: 11px;
  color: var(--color-text-disabled);
}

/* ===== Responsive ===== */
@media (max-width: 768px) {
  .chat-sidebar {
    position: fixed;
    left: 0;
    top: 0;
    bottom: 0;
    z-index: var(--z-overlay);
    transform: translateX(-100%);
    transition: transform var(--transition-slow);
    box-shadow: var(--shadow-lg);
  }

  .message-row {
    max-width: 90%;
  }

  .chat-header {
    padding: 0 var(--space-md);
  }

  .chat-messages {
    padding: var(--space-md);
  }

  .chat-input-area {
    padding: var(--space-sm) var(--space-md) var(--space-md);
  }
}

/* ===== Knowledge Graph Conversion Modal ===== */
.kg-overlay {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: rgba(0, 0, 0, 0.6);
  backdrop-filter: blur(4px);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: var(--z-overlay);
  animation: fadeIn 0.2s ease;
}

.kg-modal {
  background: var(--color-card-bg);
  border-radius: var(--radius-xl);
  box-shadow: var(--shadow-xl);
  width: 420px;
  max-width: 90vw;
  overflow: hidden;
}

.kg-modal-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--space-xl) var(--space-2xl);
  border-bottom: 1px solid var(--color-border-light);
}

.kg-modal-header h3 {
  font-size: var(--text-lg);
  font-weight: 700;
  color: var(--color-text-primary);
}

.kg-modal-close {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 32px;
  height: 32px;
  border-radius: var(--radius-full);
  border: none;
  background: transparent;
  color: var(--color-text-tertiary);
  cursor: pointer;
  transition: all var(--transition-fast);
}

.kg-modal-close:hover {
  background: var(--color-bg-hover);
  color: var(--color-text-primary);
}

.kg-modal-body {
  padding: var(--space-2xl);
}

/* Progress State */
.kg-progress-state {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-xl);
}

.kg-steps {
  display: flex;
  align-items: center;
  gap: 0;
  width: 100%;
}

.kg-step {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-sm);
}

.kg-step-indicator {
  width: 36px;
  height: 36px;
  border-radius: var(--radius-full);
  border: 2px solid var(--color-border);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: var(--text-sm);
  font-weight: 600;
  color: var(--color-text-tertiary);
  background: var(--color-card-bg);
  transition: all var(--transition-normal);
}

.kg-step.active .kg-step-indicator {
  border-color: var(--color-accent);
  color: var(--color-accent);
  background: var(--color-accent-light);
}

.kg-step.done .kg-step-indicator {
  border-color: var(--color-success);
  color: var(--color-success);
  background: var(--color-success-light, rgba(34, 197, 94, 0.1));
}

.kg-step-label {
  font-size: var(--text-xs);
  color: var(--color-text-tertiary);
  white-space: nowrap;
}

.kg-step.active .kg-step-label {
  color: var(--color-accent);
  font-weight: 600;
}

.kg-step.done .kg-step-label {
  color: var(--color-success);
}

.kg-step-connector {
  flex: 1;
  padding-bottom: 20px;
}

.kg-connector-line {
  height: 2px;
  background: var(--color-border);
  border-radius: 1px;
  position: relative;
  overflow: hidden;
}

.kg-connector-line.done {
  background: var(--color-success);
}

.kg-connector-progress {
  position: absolute;
  top: 0;
  left: 0;
  height: 100%;
  width: 70%;
  background: var(--color-accent);
  border-radius: 1px;
  animation: kgProgressPulse 1s ease-in-out infinite;
}

@keyframes kgProgressPulse {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.5; }
}

.kg-progress-tip {
  font-size: var(--text-sm);
  color: var(--color-text-secondary);
}

/* Spinner */
.kg-spinner {
  width: 16px;
  height: 16px;
  border: 2px solid transparent;
  border-top-color: var(--color-accent);
  border-radius: var(--radius-full);
  animation: spin 0.8s linear infinite;
}

@keyframes spin {
  to { transform: rotate(360deg); }
}

/* Success State */
.kg-success-state {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-lg);
}

.kg-success-icon {
  margin-bottom: var(--space-sm);
}

.kg-success-title {
  font-size: var(--text-lg);
  font-weight: 700;
  color: var(--color-text-primary);
}

.kg-result-stats {
  display: flex;
  align-items: center;
  gap: var(--space-xl);
  padding: var(--space-lg) var(--space-2xl);
  background: var(--color-bg-subtle);
  border-radius: var(--radius-lg);
}

.kg-stat-item {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-xs);
}

.kg-stat-value {
  font-size: var(--text-2xl);
  font-weight: 800;
  color: var(--color-accent);
}

.kg-stat-label {
  font-size: var(--text-xs);
  color: var(--color-text-tertiary);
}

.kg-stat-divider {
  width: 1px;
  height: 32px;
  background: var(--color-border);
}

.kg-result-kb {
  font-size: var(--text-sm);
  color: var(--color-text-secondary);
}

.kg-actions {
  display: flex;
  gap: var(--space-md);
  margin-top: var(--space-sm);
}

/* Error State */
.kg-error-state {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-lg);
}

.kg-error-icon {
  margin-bottom: var(--space-xs);
}

.kg-error-text {
  font-size: var(--text-sm);
  color: var(--color-error);
  text-align: center;
}

/* Buttons */
.kg-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: var(--space-sm) var(--space-xl);
  border-radius: var(--radius-md);
  font-size: var(--text-sm);
  font-weight: 600;
  cursor: pointer;
  transition: all var(--transition-fast);
  border: none;
}

.kg-btn-primary {
  background: var(--color-accent);
  color: var(--color-text-inverse);
}

.kg-btn-primary:hover {
  background: var(--color-accent-hover);
}

.kg-btn-secondary {
  background: var(--color-bg-hover);
  color: var(--color-text-secondary);
}

.kg-btn-secondary:hover {
  background: var(--color-border);
  color: var(--color-text-primary);
}

/* ===== Evolution Skill Tags (below assistant messages) ===== */
.evo-skill-tags-row {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-xs);
  margin-top: var(--space-xs);
  padding-left: 4px;
}

.evo-skill-tag {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  padding: 3px 10px;
  border-radius: var(--radius-full);
  background: var(--color-accent-subtle);
  color: var(--color-accent);
  font-size: 11px;
  font-weight: 500;
  cursor: pointer;
  transition: all var(--transition-fast);
  border: 1px solid transparent;
  font-family: var(--font-mono);
}

.evo-skill-tag:hover {
  background: var(--color-accent-light);
  border-color: var(--color-accent);
  transform: translateY(-1px);
}

.evo-skill-tag-more {
  background: var(--color-bg-tertiary);
  color: var(--color-text-tertiary);
  cursor: default;
  font-family: var(--font-sans);
}

.evo-skill-tag-more:hover {
  background: var(--color-bg-tertiary);
  border-color: transparent;
  transform: none;
}

/* ===== AI 生成媒体：固定缩略图 + 下载 ===== */
.md-text-seg {
  display: block;
  width: 100%;
}

.chat-media-wrap {
  position: relative;
  display: inline-block;
  max-width: 100%;
  margin: 2px 0;
}

.chat-media-img {
  display: block;
  max-width: 320px;
  max-height: 320px;
  width: auto;
  height: auto;
  object-fit: contain;
  border-radius: var(--radius-md);
  background: var(--color-bg-tertiary);
  cursor: zoom-in;
  box-shadow: var(--shadow-xs);
}

.chat-media-video {
  display: block;
  max-width: 360px;
  max-height: 320px;
  width: auto;
  height: auto;
  border-radius: var(--radius-md);
  background: #000;
  cursor: zoom-in;
  box-shadow: var(--shadow-xs);
}

.chat-media-bar {
  margin-top: 6px;
}

.chat-media-link {
  font-size: var(--text-xs);
  color: var(--color-accent);
  text-decoration: none;
}

.chat-media-link:hover {
  text-decoration: underline;
}

/* 下载按钮 */
.chat-media-dl-btn {
  position: absolute;
  top: 8px;
  right: 8px;
  width: 30px;
  height: 30px;
  display: flex;
  align-items: center;
  justify-content: center;
  border: none;
  border-radius: var(--radius-full);
  background: rgba(0, 0, 0, 0.55);
  color: #fff;
  cursor: pointer;
  opacity: 0;
  transition: opacity var(--transition-fast), background var(--transition-fast);
  z-index: 2;
}

.chat-media-wrap:hover .chat-media-dl-btn {
  opacity: 1;
}

.chat-media-dl-btn:hover {
  background: rgba(0, 0, 0, 0.75);
}

/* 下载弹层 */
.chat-media-dl-pop {
  position: absolute;
  top: 44px;
  right: 8px;
  z-index: 20;
  width: 220px;
  padding: var(--space-md);
  background: var(--color-card-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-lg);
  animation: fadeIn var(--transition-fast);
}

.chat-media-dl-title {
  font-size: var(--text-sm);
  font-weight: 600;
  color: var(--color-text-primary);
  margin-bottom: var(--space-sm);
}

.chat-media-dl-row {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  margin-bottom: var(--space-xs);
}

.chat-media-dl-label {
  font-size: var(--text-xs);
  color: var(--color-text-tertiary);
  margin-bottom: 4px;
}

.chat-media-dl-fmts {
  display: flex;
  gap: 4px;
}

.chat-media-dl-fmt {
  flex: 1;
  padding: 4px 0;
  font-size: var(--text-xs);
  font-weight: 600;
  color: var(--color-text-secondary);
  background: var(--color-bg-tertiary);
  border: 1px solid transparent;
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition: all var(--transition-fast);
}

.chat-media-dl-fmt.active {
  color: var(--color-text-inverse);
  background: var(--color-accent);
  border-color: var(--color-accent);
}

.chat-media-dl-sizes {
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.chat-media-dl-size {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 8px 10px;
  background: var(--color-bg-secondary);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition: all var(--transition-fast);
}

.chat-media-dl-size:hover {
  border-color: var(--color-accent);
  background: var(--color-accent-subtle);
}

.chat-media-dl-size-label {
  font-size: var(--text-sm);
  font-weight: 500;
  color: var(--color-text-primary);
}

.chat-media-dl-size-px {
  font-size: var(--text-xs);
  color: var(--color-text-tertiary);
  font-family: var(--font-mono);
}

/* 灯箱预览 */
.chat-lightbox {
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.78);
  backdrop-filter: blur(4px);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: var(--z-overlay);
  animation: fadeIn 0.2s ease;
}

.chat-lightbox-close {
  position: absolute;
  top: 18px;
  right: 22px;
  width: 40px;
  height: 40px;
  border-radius: var(--radius-full);
  border: none;
  background: rgba(255, 255, 255, 0.15);
  color: #fff;
  font-size: 24px;
  line-height: 1;
  cursor: pointer;
  transition: background var(--transition-fast);
}

.chat-lightbox-close:hover {
  background: rgba(255, 255, 255, 0.3);
}

.chat-lightbox-content {
  max-width: 92vw;
  max-height: 86vh;
}

/* ===== Clarify Card (模糊创作意图方向确认) ===== */
.chat-clarify-card {
  display: flex;
  flex-direction: column;
  gap: var(--space-md);
  padding: var(--space-lg);
  background: var(--color-bg-tertiary, #f5f7fb);
  border: 1px solid var(--color-border-light, #e6e9f0);
  border-radius: var(--radius-lg);
}

.chat-clarify-title {
  font-size: var(--text-sm);
  font-weight: 600;
  color: var(--color-text-primary);
}

.chat-clarify-sub {
  font-size: var(--text-xs);
  color: var(--color-text-tertiary);
  padding: 6px 10px;
  background: var(--color-bg-secondary, #fff);
  border-radius: var(--radius-sm);
  border-left: 3px solid var(--color-accent, #5B5FED);
  word-break: break-all;
}

.chat-clarify-options {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--space-sm);
}

.chat-clarify-option {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 2px;
  padding: 10px 14px;
  border: 1.5px solid var(--color-border, #dfe3ec);
  border-radius: var(--radius-md);
  background: var(--color-bg-secondary, #fff);
  cursor: pointer;
  transition: all var(--transition-fast);
  text-align: left;
}

.chat-clarify-option:hover {
  border-color: var(--color-accent, #5B5FED);
  background: var(--color-accent-subtle, #eef0ff);
  transform: translateY(-1px);
}

.chat-clarify-opt-label {
  font-size: var(--text-sm);
  font-weight: 700;
  color: var(--color-accent, #5B5FED);
}

.chat-clarify-opt-desc {
  font-size: var(--text-xs);
  color: var(--color-text-tertiary);
  line-height: 1.4;
}

@media (max-width: 640px) {
  .chat-clarify-options {
    grid-template-columns: 1fr;
  }
}

/* ===== 附件 chips ===== */
.attachment-chips {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-xs);
  padding: 8px 4px 0;
}

.attachment-chip {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  max-width: 220px;
  padding: 5px 8px 5px 10px;
  background: var(--color-bg-tertiary, #f5f7fb);
  border: 1px solid var(--color-border-light, #e6e9f0);
  border-radius: var(--radius-md);
  font-size: var(--text-xs);
  color: var(--color-text-secondary);
}

.attachment-chip svg {
  flex: none;
  color: var(--color-accent, #5B5FED);
}

.attachment-name {
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.attachment-remove {
  flex: none;
  border: none;
  background: transparent;
  color: var(--color-text-tertiary);
  font-size: 16px;
  line-height: 1;
  cursor: pointer;
  padding: 0 2px;
}

.attachment-remove:hover {
  color: #e5484d;
}

/* ===== 语音输入/朗读按钮 ===== */
.mic-btn {
  flex: none;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  border: 1px solid var(--color-border, #dfe3ec);
  border-radius: var(--radius-md);
  background: var(--color-bg-secondary, #fff);
  color: var(--color-text-secondary);
  cursor: pointer;
  transition: all var(--transition-fast);
}

.mic-btn:hover {
  border-color: var(--color-accent, #5B5FED);
  color: var(--color-accent, #5B5FED);
}

.mic-btn.recording {
  background: #e5484d;
  border-color: #e5484d;
  color: #fff;
  animation: mic-pulse 1.2s infinite;
}

@keyframes mic-pulse {
  0% { box-shadow: 0 0 0 0 rgba(229, 72, 77, 0.5); }
  70% { box-shadow: 0 0 0 10px rgba(229, 72, 77, 0); }
  100% { box-shadow: 0 0 0 0 rgba(229, 72, 77, 0); }
}

.msg-tts-btn {
  margin-top: 6px;
  display: inline-flex;
  align-items: center;
  gap: 4px;
  padding: 3px 8px;
  border: 1px solid var(--color-border-light, #e6e9f0);
  border-radius: var(--radius-sm);
  background: var(--color-bg-secondary, #fff);
  color: var(--color-text-tertiary);
  cursor: pointer;
  font-size: var(--text-xs);
  transition: all var(--transition-fast);
}

.msg-tts-btn:hover {
  border-color: var(--color-accent, #5B5FED);
  color: var(--color-accent, #5B5FED);
}

/* ===== AI 思考 / 执行过程面板（收拢式） ===== */
.ai-process {
  margin-top: 10px;
  border: 1px solid var(--color-border-light, #e6e9f0);
  border-radius: var(--radius-md, 12px);
  background: color-mix(in srgb, var(--color-bg-secondary, #fff) 75%, var(--color-accent, #5B5FED) 4%);
  backdrop-filter: blur(8px) saturate(160%);
  overflow: hidden;
  transition: border-color var(--transition-fast, .2s), box-shadow var(--transition-fast, .2s);
}

.ai-process[open] {
  box-shadow: 0 6px 22px rgba(91, 95, 237, 0.10);
  border-color: color-mix(in srgb, var(--color-accent, #5B5FED) 35%, transparent);
}

/* 新鲜出炉的思考面板 — 脉冲高亮动画 */
.ai-process-fresh {
  animation: aiProcessPulse 1.2s ease-out;
}
.ai-process-fresh .ai-process-summary {
  color: var(--color-accent, #5B5FED);
  font-weight: 700;
}

@keyframes aiProcessPulse {
  0% {
    box-shadow: 0 0 0 0 rgba(91, 95, 237, 0.4);
    border-color: var(--color-accent, #5B5FED);
  }
  50% {
    box-shadow: 0 0 0 6px rgba(91, 95, 237, 0.08);
    border-color: color-mix(in srgb, var(--color-accent, #5B5FED) 60%, transparent);
  }
  100% {
    box-shadow: 0 6px 22px rgba(91, 95, 237, 0.10);
    border-color: color-mix(in srgb, var(--color-accent, #5B5FED) 35%, transparent);
  }
}

.ai-process-summary {
  list-style: none;
  cursor: pointer;
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 9px 14px;
  font-size: var(--text-sm, 13px);
  font-weight: 600;
  color: var(--color-text-secondary, #475069);
  user-select: none;
  transition: background var(--transition-fast, .2s);
}

.ai-process-summary::-webkit-details-marker { display: none; }
.ai-process-summary::marker { content: ""; }

.ai-process-summary:hover {
  background: color-mix(in srgb, var(--color-accent, #5B5FED) 7%, transparent);
}

.ai-process-badge {
  font-size: 15px;
  line-height: 1;
  filter: drop-shadow(0 1px 2px rgba(91, 95, 237, 0.25));
}

.ai-process-list {
  padding: 4px 14px 12px;
  display: flex;
  flex-direction: column;
  gap: 8px;
  animation: ai-process-in .28s cubic-bezier(0.16, 1, 0.3, 1);
}

@keyframes ai-process-in {
  from { opacity: 0; transform: translateY(-4px); }
  to   { opacity: 1; transform: translateY(0); }
}

.ai-process-item {
  display: flex;
  gap: 10px;
  padding: 9px 12px;
  border-radius: 10px;
  background: var(--color-bg-secondary, #fff);
  border: 1px solid var(--color-border-light, #e6e9f0);
  border-left: 3px solid var(--color-accent, #5B5FED);
}

.ai-process-thinking { border-left-color: #8b8fe6; }
.ai-process-skill    { border-left-color: #5B5FED; }
.ai-process-mcp      { border-left-color: #12a594; }

.ai-process-ico {
  font-size: 15px;
  line-height: 1.4;
  flex-shrink: 0;
}

.ai-process-body {
  min-width: 0;
  flex: 1;
}

.ai-process-title {
  display: block;
  font-size: var(--text-sm, 13px);
  font-weight: 600;
  color: var(--color-text-primary, #1f2430);
  margin-bottom: 2px;
}

.ai-process-text {
  margin: 0;
  font-size: var(--text-xs, 12px);
  line-height: 1.55;
  color: var(--color-text-tertiary, #8a90a6);
  max-height: 160px;
  overflow-y: auto;
  word-break: break-word;
  white-space: pre-wrap;
}

/* 暗色主题微调 */
[data-theme="dark"] .ai-process,
html.dark .ai-process {
  background: color-mix(in srgb, var(--color-bg-secondary, #1b1d29) 70%, var(--color-accent, #5B5FED) 8%);
  border-color: color-mix(in srgb, var(--color-accent, #5B5FED) 25%, transparent);
}

/* ===== AI 回复异常状态 ===== */
.ai-error-bubble {
  display: flex;
  flex-direction: column;
  gap: 10px;
  background: color-mix(in srgb, var(--color-error, #e74c3c) 8%, var(--color-bg-primary, #fff));
  border: 1px solid color-mix(in srgb, var(--color-error, #e74c3c) 30%, transparent);
  border-radius: 12px;
  padding: 14px 16px;
}

.ai-error-icon {
  font-size: 18px;
  margin-bottom: -6px;
}

.ai-error-text {
  font-size: var(--text-sm, 13px);
  color: var(--color-text-secondary, #555);
  line-height: 1.6;
}

.ai-error-text p {
  margin: 0 0 4px;
}

.ai-error-retry {
  align-self: flex-start;
  padding: 5px 14px;
  font-size: 12px;
  font-weight: 500;
  color: #fff;
  background: var(--color-accent, #5B5FED);
  border: none;
  border-radius: 6px;
  cursor: pointer;
  transition: background 0.2s, transform 0.15s;
}

.ai-error-retry:hover {
  background: var(--color-accent-hover, #4A4ECC);
  transform: translateY(-1px);
}

.ai-error-retry:active {
  transform: scale(0.97);
}

/* 暗色主题 */
[data-theme="dark"] .ai-error-bubble,
html.dark .ai-error-bubble {
  background: color-mix(in srgb, var(--color-error, #e74c3c) 12%, var(--color-bg-primary, #1a1a2e));
  border-color: color-mix(in srgb, var(--color-error, #e74c3c) 20%, transparent);
}

/* 发送中——超时状态 */
.ai-sending-timeout {
  border-color: color-mix(in srgb, #f39c12 30%, transparent) !important;
  background: color-mix(in srgb, #f39c12 5%, var(--color-bg-primary, #fff)) !important;
}

[data-theme="dark"] .ai-sending-timeout,
html.dark .ai-sending-timeout {
  border-color: color-mix(in srgb, #f39c12 25%, transparent) !important;
  background: color-mix(in srgb, #f39c12 8%, var(--color-bg-primary, #1a1a2e)) !important;
}

.ai-cancel-btn:hover {
  background: color-mix(in srgb, #e74c3c 15%, var(--color-bg-tertiary)) !important;
}

/* ===== Phase 0 SSE 流式：思考链实时渲染 ===== */
/* 思考链文本保留模型原始换行（deepseek 原生 reasoning 含多段换行） */
.ai-process-thinking .ai-process-text {
  white-space: pre-wrap;
}

/* 流式生成中提示 */
.streaming-hint {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  color: var(--color-text-secondary);
  font-size: 14px;
}

.streaming-hint svg {
  width: 16px;
  height: 16px;
}

.ai-process-running { animation: aiPulse 1.5s ease-in-out infinite; }
@keyframes aiPulse { 0%,100% { opacity: 1; } 50% { opacity: 0.6; } }
.ai-process-error { background: rgba(255,0,0,0.05); border-left: 2px solid #e74c3c; }
.ai-process-running { border-left: 2px solid #3498db; }