.timeline {
  display: flex;
  flex-direction: column;
  gap: 0;
  max-width: 920px;
  margin: 0 auto;
  padding-bottom: 16px;
}

/* Empty state */
.timeline-empty {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: 60px 20px;
  color: var(--text-muted);
  gap: 12px;
}

.timeline-empty-spinner {
  font-size: 28px;
  animation: spin 1.2s linear infinite;
}

/* Round header */
.round-header {
  display: flex;
  align-items: center;
  gap: 10px;
  margin: 20px 0 12px;
  padding: 0 2px;
}

.round-header:first-child {
  margin-top: 0;
}

.round-header-line {
  flex: 1;
  height: 1px;
  background: var(--border);
}

.round-header-label {
  font-size: 12px;
  font-weight: 700;
  color: var(--text-muted);
  white-space: nowrap;
  letter-spacing: 0.3px;
}

.round-header-badge {
  padding: 2px 8px;
  border-radius: 12px;
  font-size: 11px;
  font-weight: 700;
}

/* Background retrieval card */
.bg-retrieval-card {
  background: var(--surface-raised);
  border: 1px solid var(--border);
  border-radius: 14px;
  margin-bottom: 18px;
  overflow: hidden;
  box-shadow: var(--shadow-card);
}

.bg-retrieval-header {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 12px 16px;
  border-bottom: 1px solid var(--border);
  cursor: pointer;
  background: var(--surface-hover);
  user-select: none;
}

.bg-retrieval-header:hover {
  background: var(--surface-hover-strong);
}

.bg-retrieval-title {
  font-size: 13px;
  font-weight: 700;
  color: var(--text);
}

.bg-retrieval-meta {
  font-size: 12px;
  color: var(--text-muted);
  margin-left: auto;
}

.bg-retrieval-chevron {
  color: var(--text-muted);
  font-size: 12px;
  transition: transform 0.2s;
}

.bg-retrieval-chevron.open {
  transform: rotate(180deg);
}

.bg-retrieval-body {
  padding: 12px 14px;
  display: flex;
  flex-direction: column;
  gap: 14px;
}

.bg-retrieval-dim {
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.bg-retrieval-dim-label {
  font-size: 11px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  color: var(--accent);
}

.bg-retrieval-result {
  margin-bottom: 8px;
}

.bg-retrieval-query {
  font-size: 11px;
  color: var(--text-muted);
  margin-bottom: 4px;
  font-style: italic;
}

.bg-retrieval-items {
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.bg-retrieval-item {
  font-size: 12px;
  color: var(--text);
  line-height: 1.5;
  padding: 4px 8px;
  background: var(--surface-hover);
  border-radius: 4px;
  border-left: 2px solid var(--border);
}

/* Coordinator card */
.coordinator-card {
  background: rgba(137, 87, 229, 0.06);
  border: 1px solid rgba(137, 87, 229, 0.25);
  border-radius: 14px;
  padding: 14px 16px;
  margin-bottom: 14px;
  box-shadow: var(--shadow-card);
}

.coordinator-card-title {
  font-size: 12px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  color: var(--purple);
  margin-bottom: 8px;
  display: flex;
  align-items: center;
  gap: 6px;
}

.coordinator-speakers {
  font-size: 13px;
  color: var(--text);
  margin-bottom: 8px;
}

.coordinator-speaker-tag {
  display: inline-block;
  background: rgba(137, 87, 229, 0.15);
  color: var(--purple);
  border-radius: 4px;
  padding: 1px 6px;
  font-size: 12px;
  margin: 0 3px;
  font-weight: 600;
}

.coordinator-focus {
  display: flex;
  flex-direction: column;
  gap: 6px;
  margin-top: 6px;
}

.coordinator-focus-item {
  display: flex;
  gap: 8px;
  align-items: flex-start;
  font-size: 12px;
}

.coordinator-focus-agent {
  font-weight: 700;
  color: var(--purple);
  flex-shrink: 0;
  min-width: 60px;
}

.coordinator-focus-directive {
  color: var(--text-muted);
  line-height: 1.5;
}

.coordinator-round-badge {
  font-weight: 400;
  color: var(--text-muted);
  text-transform: none;
  letter-spacing: 0;
  font-size: 11px;
}

.coordinator-speakers-label {
  color: var(--text-muted);
  margin-right: 4px;
}

/* 草稿进展区块 */
.coordinator-draft-section {
  margin-bottom: 10px;
  border: 1px solid rgba(137, 87, 229, 0.15);
  border-radius: 6px;
  overflow: hidden;
}

.coordinator-draft-header {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 7px 10px;
  background: rgba(137, 87, 229, 0.08);
  cursor: pointer;
  user-select: none;
}

.coordinator-draft-header:hover {
  background: rgba(137, 87, 229, 0.13);
}

.coordinator-draft-title {
  font-size: 12px;
  font-weight: 600;
  color: var(--purple);
}

.coordinator-draft-progress {
  font-size: 11px;
  color: var(--text-muted);
  margin-left: auto;
}

.coordinator-draft-chevron {
  font-size: 12px;
  color: var(--text-muted);
  transition: transform 0.15s;
}

.coordinator-draft-chevron.open {
  transform: rotate(180deg);
}

.coordinator-draft-body {
  padding: 8px 10px;
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.coordinator-draft-field {
  display: flex;
  flex-direction: column;
  gap: 2px;
  padding: 5px 8px;
  border-radius: 4px;
  font-size: 12px;
}

.coordinator-draft-field.filled {
  background: rgba(34, 197, 94, 0.06);
  border-left: 2px solid rgba(34, 197, 94, 0.5);
}

.coordinator-draft-field.empty {
  background: rgba(239, 68, 68, 0.05);
  border-left: 2px solid rgba(239, 68, 68, 0.3);
}

.coordinator-draft-field-name {
  font-weight: 600;
  color: var(--text-muted);
  font-size: 11px;
  text-transform: uppercase;
  letter-spacing: 0.3px;
}

.coordinator-draft-field-content {
  color: var(--text);
  line-height: 1.5;
}

.coordinator-draft-field-empty {
  color: var(--text-muted);
  font-style: italic;
}

/* 协调员流式动画点 */
.coordinator-streaming-dot {
  color: var(--purple);
  font-size: 10px;
  animation: pulse 1s ease-in-out infinite;
  margin-left: 6px;
}

@keyframes pulse {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.3; }
}

/* 协调员思考过程 */
.coordinator-thinking-section {
  margin-bottom: 10px;
  border: 1px solid rgba(137, 87, 229, 0.15);
  border-radius: 6px;
  overflow: hidden;
}

.coordinator-thinking-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 6px 10px;
  background: rgba(137, 87, 229, 0.06);
  cursor: pointer;
  user-select: none;
}

.coordinator-thinking-header:hover {
  background: rgba(137, 87, 229, 0.1);
}

.coordinator-thinking-label {
  font-size: 11px;
  font-weight: 600;
  color: var(--purple);
}

.coordinator-thinking-body {
  padding: 8px 10px;
  font-size: 12px;
  color: var(--text-muted);
  line-height: 1.6;
  white-space: pre-wrap;
  word-break: break-word;
  max-height: 300px;
  overflow-y: auto;
}

.coordinator-status-banner {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  margin-bottom: 10px;
  padding: 7px 10px;
  border-radius: 999px;
  background: var(--accent-soft);
  color: var(--accent);
  font-size: 12px;
  font-weight: 600;
}

.coordinator-status-banner-tail {
  display: flex;
  width: 100%;
  margin-top: 10px;
  margin-bottom: 0;
  padding: 10px 12px;
  border: 1px solid color-mix(in srgb, var(--accent) 28%, transparent);
  box-shadow: 0 8px 18px color-mix(in srgb, var(--accent) 10%, transparent);
}

.coordinator-status-spinner {
  display: inline-block;
  animation: spin 1s linear infinite;
}

/* 活跃字段（正在生成）高亮 */
.coordinator-draft-field.active {
  background: rgba(137, 87, 229, 0.08);
  border-left: 2px solid rgba(137, 87, 229, 0.6);
}

/* 缺口列表 */
.coordinator-gaps {
  margin-bottom: 10px;
}

.coordinator-gaps-title {
  font-size: 11px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.3px;
  color: #f59e0b;
  margin-bottom: 4px;
}

.coordinator-gap-item {
  font-size: 12px;
  color: var(--text-muted);
  line-height: 1.5;
  padding: 1px 0;
}

.human-review-card {
  background: rgba(88, 166, 255, 0.08);
  border: 1px solid rgba(88, 166, 255, 0.28);
  border-radius: 10px;
  padding: 14px;
  margin-bottom: 16px;
}

.human-review-title {
  display: flex;
  align-items: center;
  gap: 8px;
  color: var(--accent);
  font-size: 12px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.4px;
  margin-bottom: 8px;
}

.human-review-hint {
  font-size: 12px;
  color: var(--text-muted);
  margin-bottom: 12px;
}

.human-review-chatbox {
  min-height: 120px;
}

.human-review-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 12px;
}

.human-review-field {
  margin-bottom: 12px;
}

.human-review-field label {
  display: block;
  font-size: 11px;
  font-weight: 700;
  color: var(--text-muted);
  margin-bottom: 6px;
  text-transform: uppercase;
  letter-spacing: 0.3px;
}

.human-review-input,
.human-review-textarea {
  width: 100%;
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 6px;
  color: var(--text);
  padding: 10px;
  font-family: inherit;
  font-size: 13px;
  outline: none;
}

.human-review-speaker-select {
  width: 100%;
}

.human-review-speaker-select .t-select__wrap,
.human-review-speaker-select .t-input,
.human-review-speaker-select .t-tag-input {
  width: 100%;
}

.human-review-speaker-select .t-input,
.human-review-speaker-select .t-tag-input {
  border-color: var(--border);
  border-radius: 6px;
  background: var(--card);
  color: var(--text);
}

.human-review-speaker-select .t-input:hover,
.human-review-speaker-select .t-tag-input:hover,
.human-review-speaker-select .t-input.t-is-focused,
.human-review-speaker-select .t-tag-input.t-is-focused {
  border-color: var(--accent);
}

.human-review-speaker-select .t-tag {
  background: var(--accent-soft);
  color: var(--accent);
  border-color: var(--border);
}

.human-review-textarea {
  min-height: 220px;
  resize: vertical;
  font-family: 'SFMono-Regular', Consolas, monospace;
  line-height: 1.5;
}

.human-review-textarea-sm {
  min-height: 120px;
}

.human-review-input:focus,
.human-review-textarea:focus {
  border-color: var(--accent);
}

.human-review-meta {
  margin-top: 6px;
  font-size: 11px;
  color: var(--text-muted);
  line-height: 1.5;
}

.human-review-actions {
  display: flex;
  justify-content: flex-end;
}

.human-review-actions-left {
  justify-content: flex-start;
  margin-top: 8px;
}

.human-review-error {
  color: var(--red);
  font-size: 12px;
  margin-bottom: 10px;
}

@media (max-width: 900px) {
  .human-review-grid {
    grid-template-columns: 1fr;
  }
}

/* 下滑按钮 */
.scroll-to-bottom-button {
  position: fixed;
  bottom: 34px;
  left: 50%;
  transform: translateX(-50%);
  width: 48px;
  height: 48px;
  border-radius: 50%;
  color: #fff;
  border: 1px solid rgba(255, 255, 255, 0.34);
  background:
    radial-gradient(circle at 30% 22%, rgba(255, 255, 255, 0.42), transparent 34%),
    linear-gradient(135deg, rgba(59, 130, 246, 0.46), rgba(124, 58, 237, 0.42));
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  box-shadow:
    0 16px 40px rgba(37, 99, 235, 0.28),
    0 6px 18px rgba(15, 23, 42, 0.16),
    inset 0 1px 0 rgba(255, 255, 255, 0.24);
  transition:
    transform 0.2s ease,
    box-shadow 0.2s ease,
    background 0.2s ease,
    border-color 0.2s ease;
  z-index: 1000;
  backdrop-filter: blur(16px) saturate(1.2);
  -webkit-backdrop-filter: blur(16px) saturate(1.2);
  animation: scrollBtnIn 0.26s ease-out;
  pointer-events: auto;
}

.scroll-to-bottom-button::before {
  content: '';
  position: absolute;
  inset: -6px;
  border-radius: inherit;
  background: rgba(99, 102, 241, 0.12);
  border: 1px solid rgba(255, 255, 255, 0.12);
  pointer-events: none;
}

.scroll-to-bottom-button::after {
  content: '';
  position: absolute;
  inset: 4px;
  border-radius: inherit;
  border: 1px solid rgba(255, 255, 255, 0.2);
  pointer-events: none;
}

.scroll-to-bottom-button:hover {
  background:
    radial-gradient(circle at 30% 22%, rgba(255, 255, 255, 0.55), transparent 34%),
    linear-gradient(135deg, rgba(59, 130, 246, 0.62), rgba(124, 58, 237, 0.58));
  transform: translateX(-50%) translateY(-3px) scale(1.04);
  box-shadow:
    0 20px 48px rgba(37, 99, 235, 0.36),
    0 10px 26px rgba(15, 23, 42, 0.2),
    inset 0 1px 0 rgba(255, 255, 255, 0.32);
  border-color: rgba(255, 255, 255, 0.52);
}

.scroll-to-bottom-button:active {
  transform: translateX(-50%) translateY(-1px) scale(0.97);
  box-shadow:
    0 10px 28px rgba(37, 99, 235, 0.28),
    0 4px 14px rgba(15, 23, 42, 0.18),
    inset 0 1px 0 rgba(255, 255, 255, 0.22);
}

@keyframes scrollBtnIn {
  from {
    opacity: 0;
    transform: translateX(-50%) translateY(12px) scale(0.86);
  }
  to {
    opacity: 1;
    transform: translateX(-50%) translateY(0) scale(1);
  }
}

.scroll-to-bottom-button .scroll-arrow {
  position: relative;
  z-index: 1;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 26px;
  height: 26px;
  border-radius: 50%;
  font-size: 24px;
  line-height: 1;
  font-weight: 800;
  text-shadow: 0 2px 8px rgba(15, 23, 42, 0.32);
  animation: scrollArrowBounce 1.35s ease-in-out infinite;
}

@keyframes scrollArrowBounce {
  0%, 100% { transform: translateY(-1px); }
  50% { transform: translateY(3px); }
}