/* NexSight 共用壳层：顶栏、导航 pills、订阅、Agent 占位、toast（简报与探索共用） */

* { margin: 0; padding: 0; box-sizing: border-box; }

:root {
  /* 安慕诺企业色板（F_uxStyle）— 语义 token 保持 NexSight 变量名以兼容现有样式 */
  --canvas-deep: #0a1628;
  --surface-elevated: #1a2742;
  --surface-elevated-alt: #0f1f3a;
  --accent-cyan: #00f5ff;
  --accent-blue: #4a5bff;
  --accent-purple: #7b3ff2;
  --gradient-brand: linear-gradient(90deg, #7b3ff2 0%, #4a5bff 50%, #00f5ff 100%);
  --page-bg-gradient:
    radial-gradient(ellipse 120% 90% at 0% -10%, rgba(123, 63, 242, 0.18), transparent 52%),
    radial-gradient(ellipse 90% 70% at 100% 0%, rgba(0, 245, 255, 0.1), transparent 48%);

  --rausch: #7b3ff2;
  --rausch-active: #4a5bff;
  --ink: #ffffff;
  --body-ink: rgba(255, 255, 255, 0.86);
  --muted: rgba(255, 255, 255, 0.65);
  --muted-soft: rgba(255, 255, 255, 0.5);
  --hairline: rgba(255, 255, 255, 0.14);
  --hairline-soft: rgba(255, 255, 255, 0.08);
  --border-strong: rgba(255, 255, 255, 0.22);
  --canvas: #1a2742;
  --surface-soft: #0f1f3a;
  --surface-strong: #0a1628;
  --legal-link: #00f5ff;
  --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.35);
  --shadow-md: 0 6px 20px rgba(0, 0, 0, 0.45);
  --shadow-lg: 0 16px 48px rgba(0, 0, 0, 0.55);
  --radius-sm: 8px;
  --radius-md: 14px;
  --radius-full: 9999px;
  --side-sheet-header-min: 64px;
  --header-h: 64px;
  --safe-top: env(safe-area-inset-top, 0px);
  --safe-right: env(safe-area-inset-right, 0px);
  --safe-bottom: env(safe-area-inset-bottom, 0px);
  --safe-left: env(safe-area-inset-left, 0px);
  --panel-bg: #1a2742;
  --border-solid: var(--hairline);
  --text-primary: var(--ink);
  --text-tertiary: var(--muted);
  /* 顶栏 nav / 订阅：焦点环与玻璃面 */
  --chrome-focus-ring: 0 0 0 2px var(--canvas-deep), 0 0 0 4px var(--accent-cyan);
  --nav-track-bg: rgba(255, 255, 255, 0.06);
  --nav-track-border: rgba(255, 255, 255, 0.1);
  --chrome-pill-glass: rgba(26, 39, 66, 0.88);
  /* 简报 / 探索 分段滑块 */
  --site-nav-pad: 3px;
  --site-nav-thumb-dur: 0.28s;
  --site-nav-thumb-ease: cubic-bezier(0.4, 0, 0.2, 1);
}

@view-transition {
  navigation: auto;
}

#header.site-chrome-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  min-height: var(--header-h);
  padding: calc(var(--safe-top) + 12px) max(20px, var(--safe-right)) 12px max(20px, var(--safe-left));
  background: rgba(10, 22, 40, 0.92);
  backdrop-filter: blur(16px) saturate(1.1);
  z-index: 102;
  display: flex;
  align-items: center;
  align-content: center;
  justify-content: space-between;
  gap: 12px;
  border-bottom: 1px solid var(--hairline-soft);
  flex-wrap: wrap;
  box-shadow: 0 1px 0 rgba(0, 245, 255, 0.06);
}

/* 宽屏单行顶栏，避免 nav / 控制区分行与画布 top 错位感 */
@media (min-width: 901px) {
  #header.site-chrome-header {
    flex-wrap: nowrap;
    align-items: center;
  }

  .header-brand-scroll {
    flex: 1 1 auto;
    min-width: 0;
  }

  #header-controls {
    flex-wrap: nowrap;
  }

  /* 问 AI 侧栏（仅面板 chrome，不改简报/探索顶栏） */
  .nex-agent-panel-head {
    display: grid;
    grid-template-columns: 44px 1fr 44px;
    align-items: center;
    justify-content: stretch;
  }

  .nex-agent-panel-head h2 {
    grid-column: 2;
    text-align: center;
    margin: 0;
  }

  .nex-agent-back-btn {
    display: none !important;
  }

  .nex-agent-panel-close {
    grid-column: 3;
    justify-self: end;
  }

  /* 桌面：侧栏叠在内容上，图谱/简报不被挤压（覆盖误留的 mobile-fullpage） */
  .nex-agent-panel.nex-agent-panel--mobile-fullpage {
    width: min(420px, 100vw - 40px) !important;
    left: auto !important;
    right: 0 !important;
  }

  /* 探索页：打开问 AI 时不挤压图谱（叠层侧栏） */
  body.agent-panel-open #mynetwork {
    right: 0 !important;
    width: 100% !important;
    left: 0 !important;
  }
}

@media (min-width: 901px) and (max-width: 1240px) {
  #header-controls .github-btn .count {
    display: none !important;
  }
}

.site-chrome-header h1 {
  font-size: 16px;
  font-weight: 600;
  color: var(--text-primary);
  display: flex;
  align-items: center;
  gap: 10px;
  letter-spacing: -0.03em;
  min-width: 0;
  line-height: 1.2;
  margin: 0;
}

.header-brand-scroll {
  flex: 1 1 auto;
  min-width: 0;
  display: flex;
  align-items: center;
  overflow: visible;
  gap: 0;
}

.site-chrome-header h1 .header-brand-block {
  display: flex;
  flex-direction: row;
  align-items: center;
  gap: 10px;
  flex-shrink: 0;
  min-width: 0;
}

.site-chrome-header a.header-brand-block {
  text-decoration: none;
  color: inherit;
}

.site-chrome-header h1 .header-text-stack {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  justify-content: center;
  gap: 1px;
  min-width: 0;
}

.site-chrome-header h1 .header-title-text {
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  max-width: 100%;
  line-height: 1.2;
}

.site-chrome-header h1 .brand-mark {
  width: 30px;
  height: 30px;
  flex-shrink: 0;
  display: block;
  border-radius: 9px;
  object-fit: contain;
}

.site-chrome-header h1 .header-sub {
  font-size: 12px;
  font-weight: 500;
  color: var(--text-tertiary);
  line-height: 1.35;
  margin: 0;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  max-width: 100%;
}

.site-nav {
  position: relative;
  display: inline-flex;
  align-items: stretch;
  gap: 0;
  flex-shrink: 0;
  margin-left: 10px;
  padding: var(--site-nav-pad);
  border-radius: var(--radius-full);
  background: var(--nav-track-bg);
  border: 1px solid var(--nav-track-border);
  box-shadow: inset 0 1px 1px rgba(0, 0, 0, 0.04);
}

/* 可滑动的 iOS 式指示条（简报 / 探索）；跨文档 View Transition 时可参与 morph */
.site-nav-thumb {
  view-transition-name: nexsight-site-nav-thumb;
  position: absolute;
  left: var(--site-nav-pad);
  top: var(--site-nav-pad);
  bottom: var(--site-nav-pad);
  width: calc((100% - (var(--site-nav-pad) * 2)) / 2);
  border-radius: var(--radius-full);
  background: var(--gradient-brand);
  box-shadow: 0 1px 4px rgba(123, 63, 242, 0.45);
  z-index: 0;
  pointer-events: none;
  transform: translateX(0);
  transition:
    transform var(--site-nav-thumb-dur) var(--site-nav-thumb-ease),
    background 0.18s ease;
}

/* 探索为第二段：滑块右移（用 first/last-of-type 避免因空白文本节点破坏 nth-child） */
.site-nav:has(.site-nav-link:last-of-type.site-nav-link--active) .site-nav-thumb,
.site-nav:has(.site-nav-link:last-of-type[aria-current="page"]) .site-nav-thumb {
  transform: translateX(100%);
}

/*
 * graph.html 不使用 body.brief-page：探索链为白字并依赖 thumb 铺在第二段。
 * 无 :has() 的旧引擎不会应用上一段规则，thumb 停在左侧 ⇒「探索」看起来像消失。
 */
body:not(.brief-page) .site-nav .site-nav-thumb {
  transform: translateX(100%);
}

.site-nav:has(.site-nav-link:first-of-type.site-nav-link--active:hover) .site-nav-thumb,
.site-nav:has(.site-nav-link:first-of-type[aria-current="page"]:hover) .site-nav-thumb,
.site-nav:has(.site-nav-link:last-of-type.site-nav-link--active:hover) .site-nav-thumb,
.site-nav:has(.site-nav-link:last-of-type[aria-current="page"]:hover) .site-nav-thumb {
  filter: brightness(1.08);
}

.site-nav-link {
  position: relative;
  z-index: 1;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  flex: 1 1 0;
  min-width: 0;
  min-height: 30px;
  padding: 5px 16px;
  border-radius: var(--radius-full);
  border: none;
  background: transparent;
  color: var(--text-tertiary);
  font-size: 13px;
  font-weight: 600;
  letter-spacing: -0.02em;
  font-family: inherit;
  text-decoration: none;
  box-shadow: none;
  transition: background 0.18s ease, color 0.18s ease, box-shadow 0.18s ease;
  -webkit-tap-highlight-color: transparent;
}

.site-nav-link:hover:not(.site-nav-link--active):not([aria-current="page"]) {
  color: var(--text-primary);
  background: rgba(255, 255, 255, 0.08);
}

.site-nav-link:focus-visible {
  outline: none;
  box-shadow: var(--chrome-focus-ring);
  z-index: 2;
}

.site-nav-link:active:not(.site-nav-link--active):not([aria-current="page"]) {
  background: rgba(255, 255, 255, 0.05);
}

/* 当前页：类名或 aria-current（与 HTML 双写兼容）；着色由 thumb 承担 */
.site-nav-link--active,
.site-nav-link[aria-current="page"] {
  background: transparent;
  color: #fff;
  box-shadow: none;
}

.site-nav-link--active:hover,
.site-nav-link[aria-current="page"]:hover {
  background: transparent;
  color: #fff;
}

#header-controls {
  display: flex;
  align-items: center;
  align-content: center;
  gap: 8px;
  flex-shrink: 0;
  flex-wrap: wrap;
  justify-content: flex-end;
}

/* 窄屏专用：桌面端隐藏，媒体查询里再显示 */
.mobile-tab-bar {
  display: none;
}

/* 问 AI：顶栏按钮全端隐藏（桌面 FAB / 窄屏底栏 Tab） */
.header-agent-btn,
#header-agent-btn {
  display: none !important;
  white-space: nowrap;
  flex-shrink: 0;
}

.header-agent-btn .header-agent-label {
  white-space: nowrap;
  line-height: 1.2;
}

/* 右下角「问 AI」FAB（见 max-width 900 窄屏规则） */
.nex-agent-fab {
  position: fixed;
  right: calc(20px + var(--safe-right));
  bottom: calc(22px + var(--safe-bottom));
  z-index: 220;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 48px;
  padding: 0 18px;
  border-radius: 999px;
  border: none;
  background: var(--gradient-brand);
  color: #fff;
  font-size: 14px;
  font-weight: 700;
  font-family: inherit;
  line-height: 1.2;
  white-space: nowrap;
  flex-shrink: 0;
  cursor: pointer;
  box-shadow: var(--shadow-lg);
}

.nex-agent-fab:hover {
  background: var(--rausch-active);
}

/* 侧栏开启时隐藏 FAB，避免叠在会话层上 */
body.agent-panel-open #nex-agent-fab {
  display: none !important;
}

/* 图谱周视图等内嵌控件仍用经典白底按钮；顶栏订阅见下条 #header-controls */
.header-btn {
  background: var(--canvas);
  border: 1px solid var(--border-solid);
  color: var(--text-primary);
  padding: 10px 18px;
  border-radius: var(--radius-sm);
  cursor: pointer;
  font-size: 14px;
  font-weight: 600;
  transition: background 0.15s, border-color 0.15s, box-shadow 0.15s;
  font-family: inherit;
  display: flex;
  align-items: center;
  gap: 6px;
  min-height: 44px;
  box-shadow: var(--shadow-sm);
}

.header-btn:hover {
  background: var(--surface-soft);
  border-color: var(--border-strong);
}

.header-btn:focus-visible {
  outline: none;
  box-shadow: var(--chrome-focus-ring);
}

/* 顶栏右侧：与 .site-nav 同系的玻璃胶囊，对齐字号与高度 */
#header-controls .header-btn {
  min-height: 36px;
  padding: 6px 16px;
  border-radius: var(--radius-full);
  font-size: 13px;
  font-weight: 600;
  letter-spacing: -0.02em;
  border: 1px solid var(--nav-track-border);
  background: var(--chrome-pill-glass);
  backdrop-filter: blur(12px) saturate(1.08);
  -webkit-backdrop-filter: blur(12px) saturate(1.08);
  color: var(--text-primary);
  box-shadow:
    inset 0 1px 0 rgba(255, 255, 255, 0.06),
    0 1px 2px rgba(0, 0, 0, 0.25);
  transition: background 0.18s ease, border-color 0.18s ease, box-shadow 0.18s ease, color 0.18s ease;
}

#header-controls .header-btn:hover {
  background: rgba(26, 39, 66, 0.95);
  border-color: rgba(0, 245, 255, 0.25);
}

#header-controls .header-btn:active {
  box-shadow:
    inset 0 1px 1px rgba(0, 0, 0, 0.06),
    0 1px 2px rgba(0, 0, 0, 0.04);
}

#header-controls .header-btn:focus-visible {
  outline: none;
  box-shadow: var(--chrome-focus-ring);
}

#header-subscribe-btn[aria-expanded="true"]:focus-visible {
  box-shadow: var(--chrome-focus-ring);
}

#stats {
  display: inline-flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 8px;
}

#stats span {
  background: var(--surface-soft);
  padding: 6px 12px;
  border-radius: 999px;
  font-size: 12px;
  font-weight: 500;
  font-family: ui-monospace, "Cascadia Code", monospace;
  color: var(--text-tertiary);
  border: 1px solid var(--hairline-soft);
}

/* 简报页无图谱，顶栏 0 nodes 占位徒占宽度（易把「问 AI」挤出视口） */
body.brief-page #stats {
  display: none !important;
}

.subscribe-wrap {
  position: relative;
  display: inline-flex;
  align-items: center;
  flex-shrink: 0;
}

#header-subscribe-btn[aria-expanded="true"] {
  background: rgba(123, 63, 242, 0.15);
  border-color: rgba(0, 245, 255, 0.35);
  color: var(--accent-cyan);
  box-shadow:
    inset 0 1px 0 rgba(255, 255, 255, 0.05),
    0 0 0 1px rgba(123, 63, 242, 0.2);
}

#header-subscribe-btn[aria-expanded="true"]:hover {
  background: rgba(123, 63, 242, 0.22);
  border-color: var(--accent-cyan);
}

.subscribe-panel {
  position: absolute;
  top: calc(100% + 8px);
  right: 0;
  width: min(320px, calc(100vw - 24px));
  padding: 14px 16px;
  background: var(--panel-bg);
  border: 1px solid var(--hairline-soft);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-lg);
  z-index: 200;
  text-align: left;
}

.subscribe-panel[hidden] {
  display: none !important;
}

.subscribe-panel-title {
  font-size: 13px;
  font-weight: 600;
  color: var(--ink);
  margin: 0 0 10px;
}

.subscribe-row {
  padding: 10px 0;
  border-top: 1px solid var(--hairline-soft);
  font-size: 12px;
  line-height: 1.45;
  color: var(--body-ink);
}

.subscribe-row:first-of-type {
  border-top: none;
  padding-top: 0;
}

.subscribe-row p {
  margin: 0 0 8px;
  color: var(--muted);
  font-size: 11px;
}

.subscribe-row .action-link {
  display: inline-block;
  margin-top: 4px;
  font-size: 12px;
  color: var(--legal-link);
  text-decoration: none;
  font-weight: 500;
}

.subscribe-row .action-link:hover {
  text-decoration: underline;
}

.subscribe-qr-link {
  display: block;
  margin-top: 10px;
  text-align: center;
}

.subscribe-qr-img {
  width: 90px;
  height: 90px;
  border-radius: 8px;
  border: 1px solid var(--hairline-soft);
  object-fit: contain;
  background: #fff;
  transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.subscribe-copy-btn {
  width: 100%;
  margin-top: 4px;
  padding: 8px 12px;
  border-radius: var(--radius-sm);
  border: 1px solid var(--hairline);
  background: var(--canvas);
  color: var(--ink);
  font-size: 12px;
  font-weight: 500;
  cursor: pointer;
  font-family: inherit;
}

.subscribe-copy-btn:hover {
  background: var(--surface-soft);
}

.github-btn-group {
  display: flex;
  align-items: center;
  gap: 6px;
  margin-left: 12px;
}

.github-btn {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  background: var(--surface-elevated-alt);
  border: 1px solid var(--hairline);
  color: var(--ink);
  padding: 8px 14px;
  border-radius: var(--radius-full);
  cursor: pointer;
  font-size: 13px;
  font-weight: 600;
  transition: background 0.15s, border-color 0.15s, box-shadow 0.15s;
  text-decoration: none;
  font-family: inherit;
  box-shadow: var(--shadow-sm);
}

.github-btn:hover {
  background: var(--surface-soft);
  border-color: var(--border-strong);
  box-shadow: var(--shadow-md);
}

.github-btn svg {
  width: 14px;
  height: 14px;
  fill: currentColor;
}

.github-btn .count {
  font-family: ui-monospace, "Cascadia Code", "Consolas", monospace;
  font-size: 11px;
  color: var(--text-tertiary);
}

#subscribe-toast {
  position: fixed;
  bottom: 24px;
  left: 50%;
  transform: translateX(-50%) translateY(12px);
  padding: 10px 18px;
  background: var(--ink);
  color: #fff;
  font-size: 13px;
  border-radius: 999px;
  opacity: 0;
  pointer-events: none;
  z-index: 400;
  transition: opacity 0.2s ease, transform 0.2s ease;
}

#subscribe-toast.show {
  opacity: 1;
  transform: translateX(-50%) translateY(0);
}

@media (prefers-reduced-motion: reduce) {
  #subscribe-toast {
    transition: none;
  }

  .site-nav-thumb {
    transition: none;
  }

  .site-nav-link,
  #header-controls .header-btn {
    transition-duration: 0.01ms !important;
  }
}

.nex-agent-scrim {
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.35);
  z-index: 230;
  opacity: 0;
  visibility: hidden;
  transition: opacity 0.2s ease, visibility 0.2s;
}

.nex-agent-scrim.nex-agent-scrim--open {
  opacity: 1;
  visibility: visible;
}

.nex-agent-panel {
  position: fixed;
  top: 0;
  right: 0;
  width: min(420px, 100vw - 40px);
  height: 100%;
  height: 100dvh;
  background: var(--canvas);
  z-index: 240;
  box-shadow: var(--shadow-lg);
  transform: translateX(100%);
  transition: transform 0.28s cubic-bezier(0.4, 0, 0.2, 1);
  display: flex;
  flex-direction: column;
}

.nex-agent-panel.nex-agent-panel--open {
  transform: translateX(0);
}

/* [方案 C] 返回按钮：桌面端隐藏，移动端全屏时显示 */
.nex-agent-back-btn {
  display: none;
  min-width: 44px;
  min-height: 44px;
  border: none;
  background: transparent;
  color: var(--text-primary);
  font-size: 13px;
  font-weight: 600;
  font-family: inherit;
  cursor: pointer;
  align-items: center;
  gap: 4px;
  padding: 0 8px 0 4px;
  border-radius: var(--radius-sm);
  transition: background 0.15s;
}
.nex-agent-back-btn:hover {
  background: var(--surface-soft);
}
.nex-agent-back-btn svg {
  width: 18px;
  height: 18px;
}
.nex-agent-back-btn[hidden] {
  display: none !important;
}

/* [方案 C] 桌面端：关闭按钮始终可见，返回按钮始终隐藏 */
.nex-agent-panel-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: calc(var(--safe-top) + 14px) 16px 12px;
  border-bottom: 1px solid var(--hairline-soft);
}

.nex-agent-panel-head h2 {
  flex: 1;
  text-align: center;
}

.nex-agent-panel-close {
  min-width: 44px;
  min-height: 44px;
  border: none;
  background: var(--surface-soft);
  border-radius: var(--radius-sm);
  font-size: 18px;
  cursor: pointer;
  font-family: inherit;
}

.nex-agent-panel-body {
  flex: 1;
  display: flex;
  flex-direction: column;
  min-height: 0;
  overflow: hidden;
  padding: 0;
  font-size: 13px;
  line-height: 1.55;
  color: var(--body-ink);
}

.nex-sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

.nex-agent-frame-wrap {
  flex: 1;
  display: flex;
  flex-direction: column;
  min-height: 0;
  padding: 0;
}

.nex-agent-frame-wrap[hidden] {
  display: none !important;
}

.nex-agent-scaffold {
  flex: 1;
  display: flex;
  flex-direction: column;
  min-height: 0;
  background: var(--canvas);
}

.nex-agent-scaffold[hidden] {
  display: none !important;
}

.nex-agent-mid {
  flex: 1 1 auto;
  min-height: 0;
  display: flex;
  flex-direction: column;
}

/* 对话消息流样式（第二份定义，含 white-space: pre-wrap 用于代码块/换行） */
.nex-agent-thread {
  flex: 1 1 auto;
  min-height: 0;
  overflow-y: auto;
  overflow-x: hidden;
  padding: 12px 16px;
  -webkit-overflow-scrolling: touch;
  display: flex;
  flex-direction: column;
  justify-content: flex-start;
}

.nex-agent-thread.nex-agent-thread--idle {
  justify-content: center;
}

.nex-agent-message {
  display: flex;
  flex-direction: column;
}

.nex-agent-message--user {
  align-items: flex-end;
}

.nex-agent-message--assistant {
  align-items: flex-start;
}

.nex-agent-bubble {
  max-width: 85%;
  padding: 10px 14px;
  border-radius: 14px;
  font-size: 14px;
  line-height: 1.5;
  white-space: pre-wrap;
}

.nex-agent-bubble--user {
  background: var(--gradient-brand);
  color: #fff;
  border-bottom-right-radius: 4px;
}

.nex-agent-bubble--assistant {
  background: var(--surface-soft);
  border: 1px solid var(--hairline-soft);
  color: var(--body-ink);
  border-bottom-left-radius: 4px;
}

.nex-agent-bubble-meta {
  font-size: 11px;
  color: var(--muted);
  margin-top: 6px;
  opacity: 0.9;
}

.nex-agent-empty {
  flex-shrink: 0;
  padding: 12px 0 16px;
  text-align: center;
}
.nex-agent-empty[hidden] {
  display: none !important;
}

.nex-agent-empty-title {
  font-size: 16px;
  font-weight: 700;
  color: var(--ink);
  margin: 0 0 6px;
  letter-spacing: -0.02em;
}

.nex-agent-empty-desc {
  margin: 0;
  font-size: 13px;
  line-height: 1.52;
  color: var(--muted);
}

.nex-agent-chips {
  flex-shrink: 0;
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  padding: 0 16px 12px;
  margin-top: auto;
}
.nex-agent-chips[hidden] {
  display: none !important;
}

.nex-agent-chip {
  display: inline-flex;
  align-items: center;
  max-width: 100%;
  padding: 8px 12px;
  border-radius: var(--radius-full);
  border: 1px solid var(--hairline-soft);
  background: var(--canvas);
  color: var(--body-ink);
  font-size: 12px;
  font-weight: 500;
  font-family: inherit;
  line-height: 1.35;
  cursor: pointer;
  text-align: left;
  transition: background 0.15s, border-color 0.15s;
  box-shadow: var(--shadow-sm);
}

.nex-agent-chip:hover {
  background: var(--surface-soft);
  border-color: var(--border-strong);
}

.nex-agent-composer-wrap {
  flex-shrink: 0;
  border-top: 1px solid var(--hairline-soft);
  background: rgba(15, 31, 58, 0.98);
}

.nex-agent-composer-inner {
  display: flex;
  align-items: flex-end;
  gap: 8px;
  padding: 10px 16px calc(10px + var(--safe-bottom));
  max-width: 720px;
  margin: 0 auto;
}

.nex-agent-input {
  flex: 1;
  min-height: 44px;
  max-height: 132px;
  resize: none;
  border-radius: 12px;
  border: 1px solid var(--hairline-soft);
  padding: 10px 14px;
  font-size: 15px;
  line-height: 1.45;
  font-family: inherit;
  color: var(--ink);
  background: var(--surface-soft);
  outline: none;
  transition: border-color 0.15s, box-shadow 0.15s, background 0.15s;
}

.nex-agent-input::placeholder {
  color: var(--muted-soft);
}

.nex-agent-input:focus {
  border-color: var(--accent-cyan);
  box-shadow: 0 0 0 3px rgba(0, 245, 255, 0.12);
  background: var(--canvas);
}

.nex-agent-send {
  flex-shrink: 0;
  width: 40px;
  height: 40px;
  border-radius: 10px;
  border: none;
  background: var(--gradient-brand);
  color: #fff;
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  box-shadow: var(--shadow-sm);
  transition: background 0.15s, transform 0.1s, opacity 0.15s;
  font-family: inherit;
}

.nex-agent-send:hover {
  background: var(--rausch-active);
}

.nex-agent-send:active {
  transform: scale(0.95);
}

.nex-agent-send[disabled] {
  opacity: 0.35;
  cursor: not-allowed;
}

.nex-agent-send .nex-agent-send-icon {
  width: 18px;
  height: 18px;
}

.nex-agent-send .nex-agent-stop-icon {
  width: 16px;
  height: 16px;
  display: none;
}

.nex-agent-send--stop {
  background: var(--surface-strong) !important;
  color: var(--text-primary) !important;
  box-shadow: none !important;
}

.nex-agent-send--stop:hover {
  background: var(--surface-soft) !important;
}

.nex-agent-send--stop .nex-agent-send-icon {
  display: none;
}

.nex-agent-send--stop .nex-agent-stop-icon {
  display: block;
}

.nex-agent-frame {
  width: 100%;
  flex: 1;
  min-height: 200px;
  border: none;
  border-radius: var(--radius-sm);
}

.nex-agent-frame-wrap .nex-agent-frame {
  border: 1px solid var(--hairline-soft);
}

.nex-agent-frame[hidden] {
  display: none !important;
}

.mobile-tab-item--panel-open {
  color: var(--accent-cyan);
}

@media (max-width: 600px) {
  .nex-agent-panel {
    width: 100vw;
  }
}

@media (prefers-reduced-motion: reduce) {
  .nex-agent-panel,
  .nex-agent-scrim {
    transition: none;
  }
}

/* 与 graph 页窄屏一致：订阅层 fixed，避免被 overflow 裁切 */
@media (max-width: 900px) {
  /* bottom tab: .mobile-tab-item min-height 52px + bar padding max(12px, safe-bottom) */
  :root {
    --mobile-tab-bar-stack: calc(52px + max(12px, var(--safe-bottom)));
  }

  .github-btn-group {
    margin-left: 0 !important;
  }

  .github-btn {
    min-width: 40px;
    min-height: 40px;
    padding: 8px;
    justify-content: center;
  }

  .github-btn .count {
    display: none;
  }

  .github-btn svg {
    width: 18px;
    height: 18px;
  }

  #stats span {
    font-size: 11px;
    padding: 6px 8px;
  }

  #stats {
    display: none !important;
  }

  #header.site-chrome-header h1 .header-brand-block {
    gap: 8px;
  }

  #header.site-chrome-header h1 .header-text-stack {
    gap: 1px;
  }

  #header.site-chrome-header h1 .brand-mark {
    width: 28px;
    height: 28px;
    border-radius: 8px;
  }

  #header.site-chrome-header h1 .header-sub {
    font-size: 10px;
    line-height: 1.3;
  }

  #header.site-chrome-header {
    flex-wrap: nowrap;
    overflow-x: visible;
    overflow-y: visible;
    gap: 8px;
    box-shadow: var(--shadow-sm), inset -20px 0 18px -14px rgba(255, 255, 255, 0.92);
  }

  .header-brand-scroll {
    overflow-x: auto;
    overflow-y: hidden;
    -webkit-overflow-scrolling: touch;
    scrollbar-width: none;
    flex: 1 1 auto;
    min-width: 0;
  }

  .header-brand-scroll::-webkit-scrollbar {
    display: none;
  }

  #header.site-chrome-header h1 {
    flex: 1 1 auto;
    min-width: 0;
    font-size: 14px;
  }

  #header.site-chrome-header h1 .header-title-text,
  #header.site-chrome-header h1 .header-sub {
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
    max-width: 100%;
  }

  #header-controls {
    flex: 0 0 auto;
    flex-wrap: nowrap;
    margin-left: auto;
    gap: 6px;
    touch-action: manipulation;
    -webkit-tap-highlight-color: transparent;
  }

  /* 问 AI：底栏 Tab 已是入口，隐藏顶栏避免双入口（与移动端一致） */
  .header-agent-btn {
    display: none !important;
  }

  /* 顶栏仅剩「订阅」等控件：略增大触控面积（与 GitHub 圆钮协调） */
  #header-controls .header-btn {
    min-height: 40px;
    padding: 8px 14px;
  }

  .subscribe-panel {
    position: fixed;
    left: max(12px, var(--safe-left));
    right: max(12px, var(--safe-right));
    top: calc(var(--header-h) + 8px);
    width: auto;
    max-height: min(72vh, 520px);
    overflow-y: auto;
    -webkit-overflow-scrolling: touch;
    z-index: 220;
  }

  /* 探索页右下角已有「情报摘要」FAB，问答按钮改到左下 */
  body:not(.brief-page) .nex-agent-fab {
    right: auto;
    left: calc(16px + var(--safe-left));
  }

  /* ===== 窄屏：隐藏顶部 nav pill ===== */
  .site-nav {
    display: none !important;
  }

  /* 窄屏：隐藏悬浮 FAB，直接使用底部 Tab Bar 入口 */
  .nex-agent-fab {
    display: none !important;
  }

  /* ===== 窄屏底部 3-tab 导航栏（icon+label，等权） ===== */
  .mobile-tab-bar {
    position: fixed;
    bottom: 0;
    left: 0;
    right: 0;
    display: flex;
    align-items: stretch;
    justify-content: stretch;
    gap: 0;
    padding: 0 max(16px, var(--safe-left)) max(8px, var(--safe-bottom));
  background: rgba(10, 22, 40, 0.96);
  backdrop-filter: blur(16px) saturate(1.1);
  border-top: 1px solid var(--hairline-soft);
  box-shadow: 0 -1px 8px rgba(0, 0, 0, 0.35);
    z-index: 101;
  }

  .mobile-tab-item {
    flex: 1 1 0;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 3px;
    padding: 8px 4px;
    min-height: 52px;
    border: none;
    background: none;
    font-family: inherit;
    font-size: 10px;
    font-weight: 600;
    color: var(--text-tertiary);
    text-decoration: none;
    text-align: center;
    cursor: pointer;
    -webkit-tap-highlight-color: transparent;
    touch-action: manipulation;
    transition: color 0.15s;
    border-radius: 0;
  }

  .mobile-tab-icon {
    width: 22px;
    height: 22px;
    flex-shrink: 0;
    stroke-width: 1.8;
  }

  .mobile-tab-label {
    line-height: 1.2;
    white-space: nowrap;
  }

  .mobile-tab-item--active,
  .mobile-tab-item[aria-current="page"] {
    color: var(--accent-cyan);
  }

  .mobile-tab-item:active {
    background: var(--surface-soft);
  }

  .mobile-tab-item--disabled,
  .mobile-tab-item[aria-disabled='true'] {
    opacity: 0.48;
    pointer-events: none;
    cursor: not-allowed;
    color: var(--muted-soft);
  }

  .mobile-tab-item--disabled .mobile-tab-icon,
  .mobile-tab-item[aria-disabled='true'] .mobile-tab-icon {
    opacity: 0.88;
  }

  .mobile-tab-item--disabled:active,
  .mobile-tab-item[aria-disabled='true']:active {
    background: transparent;
  }

  .mobile-tab-item--panel-open.mobile-tab-item--disabled,
  .mobile-tab-item--panel-open[aria-disabled='true'] {
    color: var(--muted-soft);
  }

  .mobile-tab-soon {
    font-size: 8px;
    font-weight: 600;
    line-height: 1.1;
    color: var(--muted-soft);
    letter-spacing: 0.02em;
    margin-top: 1px;
    max-width: 100%;
    text-align: center;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
  }

  /* [方案 C] 移动端全屏覆盖 */
  .mobile-tab-bar--hidden {
    display: none !important;
  }

  .nex-agent-panel--mobile-fullpage {
    width: 100vw !important;
    left: 0 !important;
    right: 0 !important;
  }

  /* 移动端：返回按钮显示，关闭按钮隐藏 */
  .nex-agent-panel--mobile-fullpage .nex-agent-panel-close {
    display: none;
  }

  .nex-agent-back-btn {
    display: inline-flex;
  }

  .nex-agent-panel--mobile-fullpage .nex-agent-back-btn {
    display: inline-flex;
  }

  /* 移动端面板标题居中 */
  .nex-agent-panel--mobile-fullpage .nex-agent-panel-head {
    justify-content: center;
  }

  .nex-agent-panel--mobile-fullpage .nex-agent-panel-head h2 {
    text-align: center;
  }
}

/* ===== 智瞰问答 - 对话样式 ===== */
.nex-agent-typing {
  display: flex;
  gap: 4px;
  padding: 12px 16px;
}

.nex-agent-typing span {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--muted);
  animation: agent-typing 1.4s infinite;
}

.nex-agent-typing span:nth-child(2) { animation-delay: 0.2s; }
.nex-agent-typing span:nth-child(3) { animation-delay: 0.4s; }

@keyframes agent-typing {
  0%, 60%, 100% { transform: translateY(0); opacity: 0.4; }
  30% { transform: translateY(-4px); opacity: 1; }
}

/* 流式输出光标闪烁 */
.typing-cursor {
  display: inline-block;
  animation: cursor-blink 1s step-end infinite;
  color: var(--accent-cyan, #00f5ff);
  font-weight: bold;
}

@keyframes cursor-blink {
  0%, 50% { opacity: 1; }
  51%, 100% { opacity: 0; }
}

@media (max-width: 768px) {
  .nex-agent-bubble {
    max-width: 90%;
    font-size: 13px;
  }
}

@media (max-width: 900px) {
  body.agent-panel-open #mynetwork {
    right: 0 !important;
    width: 100% !important;
  }
}

/* ===== Phase 2 新增样式 ===== */

/* 阶段提示 */
.thinking-indicator {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 4px 0;
  font-size: 13px;
  color: var(--muted);
}

.thinking-dots {
  display: inline-flex;
  gap: 4px;
}

.thinking-dots span {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--muted);
  animation: agent-typing 1.4s infinite;
}

.thinking-dots span:nth-child(2) { animation-delay: 0.2s; }
.thinking-dots span:nth-child(3) { animation-delay: 0.4s; }

/* 停止按钮 */
.nex-agent-send--stop {
  background: var(--surface-strong) !important;
  color: var(--text-primary) !important;
  box-shadow: none !important;
}

.nex-agent-send--stop:hover {
  background: var(--surface-soft) !important;
}

/* 反馈按钮 */
.nex-agent-feedback {
  display: flex;
  gap: 8px;
  margin-top: 6px;
  opacity: 0.7;
  transition: opacity 0.15s;
}

.nex-agent-feedback:hover {
  opacity: 1;
}

.nex-agent-feedback-btn {
  background: none;
  border: none;
  font-size: 16px;
  cursor: pointer;
  padding: 4px;
  border-radius: 50%;
  transition: background 0.15s, transform 0.15s;
  line-height: 1;
}

.nex-agent-feedback-btn:hover {
  background: var(--surface-soft);
  transform: scale(1.15);
}

.nex-agent-feedback-done {
  font-size: 11px;
  color: var(--emerald, #00a854);
  font-weight: 500;
}

.nex-agent-feedback-form {
  display: flex;
  gap: 6px;
  margin-top: 6px;
}

.nex-agent-feedback-form[hidden] {
  display: none;
}

.nex-agent-feedback-form button {
  padding: 4px 10px;
  border-radius: var(--radius-full);
  border: 1px solid var(--hairline-soft);
  background: var(--canvas);
  font-size: 11px;
  color: var(--muted);
  cursor: pointer;
  font-family: inherit;
  transition: background 0.15s, border-color 0.15s, color 0.15s;
}

.nex-agent-feedback-form button:hover {
  background: var(--surface-soft);
  border-color: var(--border-strong);
  color: var(--body-ink);
}