/* 政务蓝白风格 v4：借鉴 Cherry Studio 设计语言（浅色主题 token 体系）
 * 核心：白底 + 透明黑边框 + 极浅灰用户气泡 + AI 消息无气泡 + 克制主色
 * 主色保留水利蓝（政务属性），图标统一 lucide 线条体系（无 emoji）
 */
:root {
  /* 色彩 token：高对比政务风（正文近黑、次级文字加深、边框加实） */
  --background: #ffffff;
  --background-subtle: #f7f8f9;
  --foreground: #1a1d21;            /* 正文近黑，对比度 > 15:1 */
  --foreground-secondary: #4b5158;
  --foreground-tertiary: #6b7280;   /* 次级文字（≥4.5:1） */
  --border: rgba(0, 0, 0, 0.12);
  --border-strong: rgba(0, 0, 0, 0.22);
  --muted: rgba(0, 0, 0, 0.045);
  --sidebar: #f4f5f6;

  /* 水利蓝主色（政务定制：Cherry 品牌绿 → 水利蓝） */
  --primary: #1e6fc4;
  --primary-foreground: #ffffff;
  --primary-subtle: rgba(30, 111, 196, 0.10);
  --primary-border: rgba(30, 111, 196, 0.35);

  /* 消息表面（照 Cherry：用户气泡极浅灰，非彩色） */
  --chat-user: rgba(0, 0, 0, 0.045);

  /* 引用/参考（Cherry: #cfe1ff） */
  --reference: #dce9fb;
  --reference-foreground: #1a3a5f;

  /* 圆角体系：克制（政务系统的方正感，避免圆润的"AI 卡片"味） */
  --radius: 6px;
  --radius-sm: 4px;
  --radius-lg: 8px;

  /* 滚动条 */
  --scrollbar-thumb: rgba(0, 0, 0, 0.15);
  --scrollbar-thumb-hover: rgba(0, 0, 0, 0.22);
  --scrollbar-width: 6px;

  /* 侧栏 chrome（豆包风格：浅灰底、深色字） */
  --chrome-bg: #f7f7f8;
  --chrome-fg: #1a1d21;
  --chrome-fg-dim: #6b7280;
  --chrome-hover: rgba(0, 0, 0, 0.05);
  --chrome-active: rgba(0, 0, 0, 0.08);
  --chrome-border: rgba(0, 0, 0, 0.12);
  --chrome-accent: #1e6fc4;

  /* 布局 */
  --sidebar-w: 272px;
  --header-h: 52px;

  /* 阴影 */
  --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.04);
  --shadow-md: 0 4px 20px rgba(0, 0, 0, 0.08);
  --shadow-lg: 0 16px 48px rgba(0, 0, 0, 0.12);
}

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

html, body { height: 100%; }

body {
  font-family: "PingFang SC", "Microsoft YaHei", "Helvetica Neue", Inter, -apple-system, sans-serif;
  background: var(--background);
  color: var(--foreground);
  font-size: 14px;
  line-height: 1.6;
  overflow: hidden;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

/* 文本区域可选择（Cherry: body 默认禁选，内容区开放） */
input, textarea, .markdown, #messages, .selectable, pre, code {
  -webkit-user-select: text;
  user-select: text;
}

/* 基础字号（PC 端整体放大一档，手机端 @media 另覆盖更大值） */
body { font-size: 15px; }

.app { display: flex; flex-direction: column; height: 100vh; overflow: hidden; }

/* ============ 系统顶栏（深色 chrome，豆包风格） ============ */
.topbar {
  flex: none;
  height: 44px;
  display: flex; align-items: center; gap: 12px;
  padding: 0 20px;
  background: var(--chrome-bg);
  color: var(--chrome-fg);
}
.topbar-brand { display: flex; align-items: center; gap: 8px; font-size: 14px; font-weight: 600; letter-spacing: .2px; }
.topbar-brand svg { flex: none; color: var(--chrome-accent); }
.topbar-sub { font-size: 12px; color: var(--chrome-fg-dim); }

/* ============ 主区（顶栏下方：侧栏 + 内容区横向排列） ============ */
.app-main { flex: 1; display: flex; min-height: 0; overflow: hidden; }

/* ============ 左侧会话列表（Cherry sidebar: 白底与对话区同色 + 细边框分隔） ============ */
.sidebar {
  width: var(--sidebar-w);
  min-width: var(--sidebar-w);
  background: var(--chrome-bg);
  display: flex;
  flex-direction: column;
  z-index: 20;
  transition: transform .2s ease;
}
/* 桌面端收起：整个侧边栏滑出视口 */
.app.sidebar-collapsed .sidebar,
.sidebar.sidebar-collapsed {
  margin-left: calc(-1 * var(--sidebar-w));
}

/* 侧栏品牌（系统名，替代原顶栏） */
.sidebar-brand {
  display: flex; align-items: center; gap: 7px;
  padding: 16px 14px 4px;
  font-size: 12.5px; font-weight: 600;
  color: var(--foreground-secondary);
  letter-spacing: .2px;
}
.sidebar-brand svg { flex: none; color: var(--primary); }

.sidebar-header {
  padding: 14px 12px 12px;
}

.brand { display: flex; align-items: center; gap: 10px; padding: 0 2px; }
.brand-logo {
  width: 34px; height: 34px;
  display: flex; align-items: center; justify-content: center;
  font-size: 18px;
  background: var(--background);
  border: 1px solid var(--border);
  border-radius: 9px;
}
.brand-title { font-size: 15px; font-weight: 700; color: var(--foreground); letter-spacing: .3px; }
.brand-sub { font-size: 11.5px; color: var(--foreground-tertiary); margin-top: 1px; }

/* 新建对话：列表顶部全宽按钮（Cherry: icon + 文字组成完整按钮） */
.conv-toolbar {
  padding: 12px 10px 6px;
  flex-shrink: 0;
}
.btn-new {
  display: flex; align-items: center; justify-content: center; gap: 6px;
  width: 100%;
  height: 34px;
  border: 1px solid var(--chrome-border);
  background: rgba(255, 255, 255, 0.06);
  color: var(--chrome-fg);
  border-radius: var(--radius);
  font-size: 14px;
  font-weight: 500;
  cursor: pointer;
  transition: background .12s;
}
.btn-new svg { color: var(--chrome-accent); }
.btn-new:hover { background: var(--chrome-hover); }
.btn-new:active { transform: scale(.98); }

.conv-list { flex: 1; overflow-y: auto; padding: 2px 8px 8px; }
.conv-empty { padding: 24px 12px; text-align: center; color: var(--chrome-fg-dim); font-size: 13.5px; }
/* 时间分组标题（豆包：深色底上淡字） */
.conv-group-title {
  padding: 14px 12px 6px;
  font-size: 11.5px;
  font-weight: 400;
  color: var(--chrome-fg-dim);
  user-select: none;
}

/* 会话项（豆包风格：深色底、42px 高、软调选中态） */
.conv-item {
  display: flex; align-items: center; gap: 10px;
  height: 40px;
  padding: 0 12px;
  margin-bottom: 2px;
  border-radius: var(--radius);
  cursor: pointer;
  font-size: 14px;
  color: var(--chrome-fg);
  white-space: nowrap;
  transition: background .12s;
}
/* 任务条目：纯文字列表（去掉彩色圆底图标，减少视觉噪音） */
.conv-item .conv-icon { display: none; }
.conv-item:hover { background: var(--chrome-hover); }
/* 选中态：浅色高亮 + 加粗 */
.conv-item.active { background: var(--chrome-active); font-weight: 600; }
/* 标题右侧渐变淡出（渐隐而非硬切断，豆包 mask 效果） */
.conv-item .conv-name {
  flex: 1;
  overflow: hidden;
  white-space: nowrap;
  -webkit-mask-image: linear-gradient(90deg, #000 88%, transparent 98%);
  mask-image: linear-gradient(90deg, #000 88%, transparent 98%);
}
.conv-item .conv-del {
  flex-shrink: 0;
  display: flex; align-items: center; justify-content: center;
  width: 22px; height: 22px;
  border: none; background: none; cursor: pointer;
  color: var(--chrome-fg-dim);
  border-radius: var(--radius-sm);
  opacity: 0;
  transition: opacity .12s, background .12s, color .12s;
  margin-right: -4px;
}
.conv-item:hover .conv-del { opacity: 1; }
.conv-item .conv-del:hover { color: #ff7b7b; background: rgba(255, 123, 123, .15); }

.sidebar-footer { padding: 10px; }
/* 知识库管理入口（Cherry: 整行 ghost 按钮） */
.kb-manage {
  display: flex; align-items: center; gap: 8px;
  width: 100%;
  height: 34px;
  padding: 0 10px;
  border: none; background: none; cursor: pointer;
  color: var(--foreground-tertiary);
  border-radius: 8px;
  font-size: 13.5px;
  transition: background .12s, color .12s;
}
.kb-manage:hover { background: var(--muted); color: var(--foreground); }
.kb-manage-label { flex: 1; text-align: left; }
.kb-manage-count {
  font-size: 11px;
  color: var(--foreground-tertiary);
  background: var(--muted);
  border-radius: 9px;
  padding: 1px 7px;
}

.sidebar-mask { display: none; }

/* ============ 中间对话区（Cherry: 白底） ============ */
.chat-area { flex: 1; display: flex; flex-direction: column; min-width: 0; background: var(--background); }

.chat-header {
  height: var(--header-h);
  display: flex; align-items: center;
  padding: 0 14px;
  gap: 4px;
}
/* 顶栏图标按钮（Cherry NavbarIcon: ghost、muted、hover bg-muted） */
.btn-menu, .btn-sidebar-toggle {
  display: flex; align-items: center; justify-content: center;
  background: none; border: none; cursor: pointer;
  color: var(--foreground-tertiary);
  width: 32px; height: 32px;
  border-radius: 8px;
  transition: background .12s, color .12s;
}
.btn-menu:hover, .btn-sidebar-toggle:hover { background: var(--muted); color: var(--foreground); }
.btn-menu { display: none; }
.chat-title-wrap { display: flex; flex-direction: column; line-height: 1.25; margin-left: 4px; }
.chat-title { font-size: 15.5px; font-weight: 600; color: var(--foreground); max-width: 50vw; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.chat-sub { font-size: 12px; color: var(--foreground-tertiary); }

/* ============ 统一内容列（表单向导宽屏布局） ============
   诊断向导是表单类页面（16 字段表单 / 33 行 × 10 列场景表），
   需要宽屏；不再沿用聊天应用的 800px 窄列 */
.chat-column {
  position: relative;
  max-width: 1400px;
  width: 100%;
  margin: 0 auto;
  padding: 0 28px;
}

/* 消息区（全宽滚动，滚动条贴右缘；Cherry: 无背景、细滚动条） */
.messages {
  flex: 1; overflow-y: auto;
  padding: 20px 0;
  scroll-behavior: smooth;
  scrollbar-gutter: stable;
}


/* 欢迎页 */
.welcome { text-align: center; margin-top: 9vh; padding: 0 20px; animation: fadeUp .35s ease; }
@keyframes fadeUp { from { opacity: 0; transform: translateY(12px); } to { opacity: 1; transform: none; } }
.welcome-logo {
  width: 56px; height: 56px; margin: 0 auto 16px;
  display: flex; align-items: center; justify-content: center;
  color: var(--primary);
  background: var(--primary-subtle);
  border-radius: var(--radius);
}
.welcome h2 { font-size: 23px; color: var(--foreground); font-weight: 700; margin-bottom: 8px; }
.welcome-desc { font-size: 14.5px; color: var(--foreground-tertiary); line-height: 1.8; margin-bottom: 28px; }
.welcome-hints { display: flex; flex-wrap: wrap; justify-content: center; gap: 8px; max-width: 640px; margin: 0 auto; }
.hint {
  display: flex; align-items: center; gap: 7px;
  padding: 8px 16px;
  border: 1px solid var(--border);
  border-radius: 999px;
  background: var(--background);
  font-size: 14px;
  cursor: pointer;
  color: var(--foreground);
  transition: all .13s;
}
.hint .hint-icon { font-size: 14px; }
.hint:hover { border-color: var(--primary-border); color: var(--primary); background: var(--primary-subtle); }

/* 消息（Cherry 结构：用户右对齐浅灰气泡，AI 无气泡直排） */
.msg { display: flex; margin-bottom: 22px; padding: 0; animation: fadeUp .2s ease; position: relative; }
.msg.user { justify-content: flex-end; }
.msg.assistant { justify-content: flex-start; }

.msg.user .bubble {
  max-width: min(70%, 720px);
  padding: 9px 16px;
  border-radius: var(--radius-lg);
  background: var(--chat-user);           /* Cherry: rgba(0,0,0,0.045) 极浅灰 */
  color: var(--foreground);
  font-size: 15px;
  line-height: 1.65;
  white-space: pre-wrap;
  word-break: break-word;
  text-align: left;
}

.msg.assistant .bubble {
  max-width: 100%;
  padding-left: 0;                        /* Cherry: AI 无气泡无边框 */
  font-size: 15px;
  line-height: 1.65;
  white-space: normal;
  word-break: break-word;
}

/* AI 文本与输入框文字起点对齐：textarea padding-left 15px，消息同补 15px */
.msg.assistant .markdown-content { padding-left: 15px; }

/* 消息操作栏（常驻显示：复制/重新生成，muted 图标按钮） */
.msg-actions {
  display: flex; align-items: center; gap: 2px;
  margin-top: 6px;
}
.msg-actions .action-btn {
  display: flex; align-items: center; justify-content: center;
  width: 26px; height: 26px;
  border: none; background: none; cursor: pointer;
  color: var(--foreground-tertiary);
  border-radius: 6px;
  transition: background .1s, color .1s;
}
.msg-actions .action-btn:hover { background: var(--muted); color: var(--foreground); }
.msg-actions .action-btn.copied { color: var(--primary); }

/* Markdown 渲染（Cherry markdown.css 风格） */
.markdown-content { color: var(--foreground); overflow-wrap: anywhere; word-break: normal; }
.markdown-content > :first-child { margin-top: 0; }
.markdown-content > :last-child { margin-bottom: 0; }

.markdown-content h1, .markdown-content h2, .markdown-content h3,
.markdown-content h4, .markdown-content h5, .markdown-content h6 {
  margin: 1.4em 0 0.6em;
  color: var(--foreground);
  line-height: 1.35;
}
.markdown-content h1 {
  padding-bottom: 0.35em;
  border-bottom: 1px solid var(--border);
  font-size: 1.5em;
  font-weight: 700;
}
.markdown-content h2 { font-size: 1.3em; font-weight: 700; }
.markdown-content h3 { font-size: 1.12em; font-weight: 600; }
.markdown-content h4 { font-size: 1em; font-weight: 600; }

.markdown-content p { margin: 0.6em 0; }
.markdown-content ul, .markdown-content ol { margin: 0.6em 0; padding-left: 1.6em; }
.markdown-content li { margin: 0.25em 0; }
.markdown-content strong { font-weight: 700; }

.markdown-content code {
  background: var(--muted);
  border-radius: 4px;
  padding: 0.15em 0.4em;
  font-size: 0.88em;
  font-family: Consolas, Monaco, "Courier New", monospace;
}
.markdown-content pre {
  background: var(--background-subtle);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 12px 14px;
  overflow-x: auto;
  margin: 0.8em 0;
}
.markdown-content pre code { background: none; border: none; padding: 0; }
.markdown-content table { border-collapse: collapse; margin: 0.8em 0; font-size: 13.5px; width: 100%; }
.markdown-content th, .markdown-content td { border: 1px solid var(--border-strong); padding: 6px 10px; text-align: left; }
.markdown-content th { background: var(--background-subtle); font-weight: 600; }
.markdown-content blockquote {
  background: var(--background-subtle);
  padding: 8px 14px;
  margin: 0.8em 0;
  color: var(--foreground-tertiary);
  border-radius: 8px;
  font-size: 13.5px;
}
.markdown-content hr { border: none; border-top: 1px solid var(--border); margin: 1.2em 0; }

/* 引用标注（Cherry: 浅蓝 reference 底） */
.citation {
  display: inline-block;
  font-size: 11px;
  font-weight: 600;
  color: var(--reference-foreground);
  background: var(--reference);
  border-radius: 4px;
  padding: 0 5px;
  margin: 0 2px;
  cursor: pointer;
  vertical-align: baseline;
  transition: all .1s;
}
.citation:hover { filter: brightness(0.92); }

/* 来源折叠（Cherry: 细边卡片） */
.sources-box {
  margin-top: 14px;
  font-size: 13.5px;
  max-width: 760px;
}
.sources-label {
  font-size: 12px; color: var(--foreground-tertiary);
  margin-bottom: 6px;
  display: flex; align-items: center; gap: 6px;
  cursor: pointer;
  user-select: none;
  width: fit-content;
  padding: 3px 6px 3px 0;
  border-radius: 6px;
}
.sources-label:hover { color: var(--foreground); }
.sources-label .sources-icon { color: var(--foreground-tertiary); }
.sources-label .src-collapse-btn {
  display: flex; align-items: center; justify-content: center;
  width: 18px; height: 18px;
  border: none; background: none; cursor: pointer;
  color: var(--foreground-tertiary);
  border-radius: 4px;
  transition: transform .15s, background .1s, color .1s;
  padding: 0;
}
.sources-label .src-collapse-btn:hover { background: var(--muted); color: var(--foreground); }
.sources-box.collapsed .src-collapse-btn { transform: rotate(-90deg); }
/* 收起时隐藏来源列表 */
.sources-box.collapsed details { display: none; }
.sources-box details {
  margin-bottom: 4px;
  border: 1px solid var(--border);
  border-radius: 8px;
  background: var(--background);
  overflow: hidden;
  transition: border-color .12s;
}
.sources-box details:hover { border-color: var(--border-strong); }
.sources-box details[open] { border-color: var(--primary-border); }
.sources-box summary {
  cursor: pointer;
  color: var(--foreground);
  padding: 7px 12px;
  font-size: 13.5px;
  user-select: none;
  display: flex; align-items: center; gap: 7px;
}
.sources-box summary .src-icon { color: var(--foreground-tertiary); flex-shrink: 0; }
.sources-box summary .src-name { overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.sources-box summary .src-chevron { margin-left: auto; color: var(--foreground-tertiary); transition: transform .15s; flex-shrink: 0; }
.sources-box details[open] summary .src-chevron { transform: rotate(90deg); }
.sources-box summary:hover { background: var(--background-subtle); }
.sources-box .src-text {
  margin: 0;
  background: var(--background);
  border-top: 1px solid var(--border);
  padding: 9px 12px;
  max-height: 220px;
  overflow-y: auto;
  word-break: break-word;
  line-height: 1.55;
  font-size: 13.5px;
  color: var(--foreground);
}
/* 引用原文中的表格：紧凑展示 */
.sources-box .src-text table {
  width: 100%;
  font-size: 12px;
  margin: 4px 0;
}
.sources-box .src-text th,
.sources-box .src-text td {
  border: 1px solid var(--border-strong);
  padding: 3px 6px;
  white-space: normal;
  word-break: break-word;
}
.sources-box .src-text p { margin: 3px 0; }
.sources-box .src-text ul, .sources-box .src-text ol { margin: 3px 0; padding-left: 18px; }

/* 正在准备回复占位（Cherry PlaceholderBlock 照抄）：
   flex min-h-7 items-center gap-1.5 text-[13px] text-foreground-tertiary */
.placeholder-status {
  display: flex;
  align-items: center;
  gap: 6px;
  min-height: 28px;
  padding: 2px 0;
  font-size: 13px;
  line-height: 20px;
  color: var(--foreground-tertiary);
  user-select: none;
}
.placeholder-status .beat-loader {
  display: inline-flex;
  align-items: center;
  gap: 3px;
}
.placeholder-status .beat-dot {
  width: 4px;
  height: 4px;
  border-radius: 50%;
  background: currentColor;
  animation: beat 0.9s ease-in-out infinite;
}
.placeholder-status .beat-dot:nth-child(2) { animation-delay: 0.15s; }
.placeholder-status .beat-dot:nth-child(3) { animation-delay: 0.3s; }
@keyframes beat {
  0%, 80%, 100% { transform: scale(0.4); opacity: 0.5; }
  40% { transform: scale(1); opacity: 1; }
}

/* ============ 输入区（照搬 Cherry Studio composer） ============ */
/* 全宽容器；chat-column(800px) 内部约束宽度，与消息列严格对齐。
   overflow-y:auto + scrollbar-gutter:stable → 与 .messages 同样预留滚动条宽度，
   两列容器实际宽度一致（内容不溢出则不出现滚动条，仅占位） */
.input-bar {
  padding: 0 0 20px;
  overflow-y: auto;
  scrollbar-gutter: stable;
}

/* inputbar-container: 圆角20px + 0.5px边框 + 卡片底 + 细阴影（Cherry 原样）
   宽度由外层 narrow-layout(800px) 统一控制，与消息区对齐 */
.inputbar-container {
  position: relative;
  background: var(--card, var(--background));
  border: 0.5px solid var(--border);
  border-radius: 20px;
  box-shadow: var(--shadow-sm);
  padding-top: 8px;
  transition: border-color .15s;
}
.inputbar-container:focus-within { border-color: var(--primary-border); }

/* textarea：右侧 44px 留给发送按钮（Cherry: padding 6px 44px 0 15px） */
.inputbar-container textarea {
  display: block;
  box-sizing: border-box;
  width: 100%;
  min-width: 0;
  resize: none;
  overflow-y: auto;
  background: transparent;
  border: none;
  outline: none;
  color: var(--foreground);
  font-size: 15px;
  font-family: inherit;
  line-height: 1.4;
  padding: 6px 44px 0 15px;
  max-height: 150px;
}
.inputbar-container textarea::placeholder { color: var(--foreground-tertiary); }

/* 附件列表（Cherry file token: 类型色块图标 + 文件名 + 删除） */
.attachment-list {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  padding: 0 14px 6px;
}
.attachment-item {
  display: flex;
  align-items: center;
  gap: 7px;
  border: 1px solid var(--border);
  border-radius: 8px;
  background: var(--background);
  padding: 4px 8px 4px 5px;
  font-size: 13px;
  max-width: 240px;
  transition: border-color .12s;
}
.attachment-item:hover { border-color: var(--border-strong); }
.attachment-item .att-icon {
  display: flex; align-items: center; justify-content: center;
  width: 24px; height: 24px;
  border-radius: 6px;
  font-size: 11px;
  font-weight: 700;
  flex-shrink: 0;
}
/* Cherry 类型色块 */
.att-icon.pdf { background: #fee2e2; color: #b91c1c; }
.att-icon.word { background: #dbeafe; color: #1d4ed8; }
.att-icon.excel { background: #dcfce7; color: #15803d; }
.att-icon.txt, .att-icon.md { background: #f3f4f6; color: #4b5563; }
.att-icon.other { background: #ede9fe; color: #6d28d9; }
.attachment-item .att-name {
  flex: 1;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  color: var(--foreground);
}
.attachment-item .att-del {
  display: flex; align-items: center; justify-content: center;
  width: 18px; height: 18px;
  border: none; background: none; cursor: pointer;
  color: var(--foreground-tertiary);
  border-radius: 4px;
  flex-shrink: 0;
  padding: 0;
}
.attachment-item .att-del:hover { color: #d33; background: rgba(221, 51, 51, .08); }
.attachment-item .att-spin {
  width: 12px; height: 12px;
  border: 2px solid var(--border);
  border-top-color: var(--primary);
  border-radius: 50%;
  animation: att-rotate .7s linear infinite;
  flex-shrink: 0;
}
@keyframes att-rotate { to { transform: rotate(360deg); } }

/* 用户消息内的附件卡片（Cherry：发送后附件显示在对话气泡里） */
.msg-attachments {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  margin-bottom: 6px;
}
.msg-attachments .attachment-item { max-width: 260px; }
.msg-attachments .att-name {
  text-decoration: none;
  cursor: pointer;
}
.msg-attachments .att-name:hover { text-decoration: underline; color: var(--primary); }

/* composer-actions 工具栏：h-10 两端对齐（Cherry: flex h-10 justify-between px-2 py-1.25） */
.composer-actions {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 4px;
  height: 40px;
  padding: 5px 8px;
  position: relative;
  z-index: 2;
}
.composer-left {
  display: flex;
  align-items: center;
  gap: 8px;
  min-width: 0;
  flex: 1;
  overflow: hidden;
}

/* 左侧工具按钮（Cherry ghost: muted → hover bg-muted） */
.tool-btn {
  display: flex; align-items: center; justify-content: center;
  width: 28px; height: 28px;
  border: none; background: none; cursor: pointer;
  color: var(--foreground-tertiary);
  border-radius: 8px;
  transition: background .1s, color .1s;
  flex-shrink: 0;
}
.tool-btn:hover { background: var(--muted); color: var(--foreground); }
.tool-btn:active { transform: scale(.94); }
/* 清除上下文成功反馈（Cherry: 短暂换勾） */
.tool-btn.done { color: #34c759; }
.tool-btn.done svg { display: none; }
.tool-btn.done::after {
  content: "✓";
  font-size: 13px;
  font-weight: 700;
  line-height: 1;
}

/* 发送按钮（Cherry SendMessageButton: 主色图标 22px、无底、hover 过渡） */
.btn-send {
  display: flex; align-items: center; justify-content: center;
  width: 32px; height: 32px;
  background: none; border: none; cursor: pointer;
  color: var(--primary);
  border-radius: 8px;
  flex-shrink: 0;
  transition: all .2s;
}
.btn-send:hover { background: var(--primary-subtle); }
.btn-send:active { transform: scale(.94); }
.btn-send:disabled { color: var(--foreground-disabled, var(--foreground-tertiary)); cursor: not-allowed; }
.btn-send.stop { color: #e5484d; }
.btn-send.stop:hover { background: rgba(229, 72, 77, .08); }

/* ============ 弹窗遮罩（居中弹窗 uiAlert/uiConfirm 用） ============ */
.modal-mask {
  position: fixed; inset: 0;
  background: rgba(0, 0, 0, 0.38);
  z-index: 100;
  display: flex; align-items: center; justify-content: center;
  opacity: 0; pointer-events: none;
  transition: opacity .18s ease;
}
.modal-mask.show { opacity: 1; pointer-events: auto; }

/* 上传区（点击/拖拽）：大拖拽目标，视觉焦点 */
.kb-upload-zone {
  display: flex; flex-direction: column; align-items: center; justify-content: center;
  gap: 12px;
  height: calc(100vh - 300px);
  min-height: 320px;
  padding: 48px 24px;
  border: 2px dashed var(--border-strong);
  border-radius: var(--radius);
  color: var(--foreground-tertiary);
  cursor: pointer;
  transition: border-color .15s, background .15s, color .15s;
  outline: none;
}
.kb-upload-zone:hover, .kb-upload-zone.dragover {
  border-color: var(--primary);
  background: var(--primary-subtle);
  color: var(--primary);
}
.kb-upload-zone svg { width: 34px; height: 34px; }
.kb-upload-zone .kb-upload-text { font-size: 16px; font-weight: 500; color: var(--foreground); }
.kb-upload-zone .kb-upload-hint { font-size: 13px; }

.kb-section-title {
  display: flex; align-items: center; gap: 6px;
  margin: 14px 0 8px;
  font-size: 12px; font-weight: 600;
  color: var(--foreground-tertiary);
}
.kb-section-count { font-weight: 400; }

/* 导入任务项 */
.kb-import { display: flex; align-items: center; gap: 8px; padding: 7px 4px; font-size: 13.5px; }
.kb-import .kb-import-name {
  flex: 1; overflow: hidden; text-overflow: ellipsis; white-space: nowrap;
  color: var(--foreground);
}
.kb-import .kb-import-status { display: flex; align-items: center; gap: 6px; flex-shrink: 0; }
.kb-import .kb-import-status svg { flex-shrink: 0; }
.kb-import .kb-import-status .st-done { color: #34c759; font-size: 12px; }
.kb-import .kb-import-status .st-failed { color: #e5484d; font-size: 12px; }
.kb-import .kb-import-status .st-queued { color: var(--foreground-tertiary); font-size: 12px; }
/* 导入进度条 */
.kb-import .kb-progress {
  width: 110px; height: 5px;
  border-radius: 3px;
  background: var(--muted);
  overflow: hidden;
  flex-shrink: 0;
}
.kb-import .kb-progress-fill {
  display: block;
  height: 100%;
  border-radius: 3px;
  background: var(--primary);
  transition: width .4s ease;
}
.kb-import .kb-progress-text {
  font-size: 11px;
  color: var(--foreground-tertiary);
  min-width: 28px;
  text-align: right;
}
.kb-import .kb-import-err {
  width: 100%;
  color: #e5484d;
  font-size: 11.5px;
  margin-top: 2px;
  overflow: hidden; text-overflow: ellipsis; white-space: nowrap;
}
/* 删除任务记录（常显） */
.kb-import .kb-import-del {
  flex-shrink: 0;
  display: flex; align-items: center; justify-content: center;
  width: 20px; height: 20px;
  border: none; background: none; cursor: pointer;
  color: var(--foreground-tertiary);
  border-radius: 5px;
  transition: background .12s, color .12s;
}
.kb-import .kb-import-del:hover { color: #d33; background: rgba(221, 51, 51, .1); }

/* 已入库文档项 */
.kb-doc {
  display: flex; align-items: center; gap: 8px;
  padding: 8px 10px;
  border: 1px solid var(--border);
  border-radius: 8px;
  margin-bottom: 6px;
  transition: border-color .12s;
}
.kb-doc:hover { border-color: var(--border-strong); }
.kb-doc .kb-doc-icon { color: var(--primary); flex-shrink: 0; display: flex; }
.kb-doc .kb-doc-info { flex: 1; min-width: 0; }
.kb-doc .kb-doc-name {
  font-size: 13.5px; color: var(--foreground);
  overflow: hidden; text-overflow: ellipsis; white-space: nowrap;
}
.kb-doc .kb-doc-meta { font-size: 12px; color: var(--foreground-tertiary); margin-top: 1px; }
.kb-doc .kb-doc-del {
  flex-shrink: 0;
  display: flex; align-items: center; justify-content: center;
  width: 24px; height: 24px;
  border: none; background: none; cursor: pointer;
  color: var(--foreground-tertiary);
  border-radius: 6px;
  transition: background .12s, color .12s;
}
.kb-doc .kb-doc-del:hover { color: #d33; background: rgba(221, 51, 51, .1); }

.kb-empty { padding: 14px 4px; text-align: center; color: var(--foreground-tertiary); font-size: 12px; }

/* 错误样式 */
.msg .bubble.error-bubble { border: 1px solid rgba(229, 72, 77, .3); background: rgba(229, 72, 77, .05); color: #c0392b; border-radius: var(--radius-lg); }

/* ============ 滚动条（Cherry: 6px 透明黑） ============ */
::-webkit-scrollbar { width: var(--scrollbar-width); height: var(--scrollbar-width); }
::-webkit-scrollbar-track, ::-webkit-scrollbar-corner { background: transparent; }
::-webkit-scrollbar-thumb { border-radius: 10px; background: var(--scrollbar-thumb); }
::-webkit-scrollbar-thumb:hover { background: var(--scrollbar-thumb-hover); }
* { scrollbar-width: thin; scrollbar-color: var(--scrollbar-thumb) transparent; }

/* ============ 移动端适配 ============ */
@media (max-width: 768px) {
  /* 消除移动端 300ms 点击延迟/双击缩放误判（真机"点两次才生效"根因） */
  html, body { touch-action: manipulation; }

  .sidebar {
    position: fixed;
    left: 0; top: 0; bottom: 0;
    transform: translateX(-100%);
    transition: transform .15s ease;
    box-shadow: var(--shadow-lg);
  }
  .sidebar.open { transform: translateX(0); }
  .sidebar-mask {
    display: block;
    position: fixed; inset: 0;
    background: rgba(0, 0, 0, 0.35);
    z-index: 15;
    opacity: 0;
    pointer-events: none;
    transition: opacity .2s;
  }
  .sidebar-mask.show { opacity: 1; pointer-events: auto; }

  /* 手机端删除按钮常驻（不依赖 hover，避免"第一次点击拦截"问题；热区加大防误触） */
  .conv-item .conv-del {
    opacity: 1;
    width: 30px; height: 30px;
    margin-right: -4px;
  }

  /* ① 顶部压缩：只留汉堡（隐藏自定义标题 + 侧栏矩形图标，释放纵向空间） */
  .chat-header { height: 44px; padding: 0 8px; }
  .btn-menu { display: block; }
  .btn-sidebar-toggle { display: none; }
  .chat-title-wrap { display: none; }

  /* ② 欢迎页紧凑：缩小 logo/间距，推荐问题按钮适配窄屏（字体已加大加粗） */
  .welcome { margin-top: 2vh; padding: 0 12px; }
  .welcome-logo { width: 44px; height: 44px; margin-bottom: 10px; font-size: 22px; border-radius: 13px; }
  .welcome h2 { font-size: 19px; margin-bottom: 4px; font-weight: 700; }
  .welcome-desc { font-size: 13.5px; line-height: 1.7; margin-bottom: 14px; }
  .welcome-hints { gap: 6px; }
  .hint { padding: 7px 13px; font-size: 13.5px; font-weight: 500; max-width: 100%; }

  .msg.user .bubble { max-width: 88%; }
  .messages { padding: 16px 0; }

  /* 手机端字体整体加大加粗（领导手机演示可读性） */
  body { font-size: 15px; }
  .conv-item { font-size: 15px; font-weight: 500; }
  .conv-group-title { font-size: 12.5px; }
  .btn-new { font-size: 14px; font-weight: 600; }
  .kb-manage { font-size: 13.5px; font-weight: 500; }
  .msg.user .bubble, .msg.assistant .bubble { font-size: 17px; }
  .markdown-content h2 { font-size: 1.35em; }
  #input { font-size: 17px; }
  .composer-hint, .kb-upload-hint { font-size: 12px; }
  .sources-label, .src-name { font-size: 13px; }
  .kb-import-name, .kb-doc-name { font-size: 13.5px; font-weight: 500; }
  .kb-doc-meta { font-size: 12px; }

  /* ③ 输入框：底部安全区适配 + 简化工具栏（只留附件/发送）+ 点击热区 ≥40px */
  .input-bar { padding: 0 0 max(12px, env(safe-area-inset-bottom)); }
  .composer-left { gap: 2px; }
  .btn-new-conv, .btn-clear-context, .btn-clear { display: none; }
  .tool-btn { width: 40px; height: 40px; }
  .btn-send { width: 40px; height: 40px; }
  .chat-column { padding: 0 16px; }
}

/* ============ 诊断向导（wizard）样式 ============ */
/* 步骤条：下划线式标签（政务系统 tab 风格，非胶囊） */
.wizard-steps {
  display: flex; gap: 0; padding: 0; flex-wrap: wrap;
  border-bottom: 1px solid var(--border);
  margin-bottom: 22px;
}
.wizard-step {
  display: flex; align-items: center; gap: 8px;
  padding: 12px 0; margin-right: 30px; margin-bottom: -1px;
  border: none; border-bottom: 2px solid transparent;
  background: none;
  color: var(--foreground-tertiary);
  font-size: 14px; cursor: pointer;
  transition: color .15s, border-color .15s;
}
.wizard-step:hover { color: var(--foreground); }
.wizard-step.active {
  color: var(--primary); border-bottom-color: var(--primary); font-weight: 600;
}
.wizard-step.done { color: var(--foreground); border-bottom-color: var(--border-strong); }
.ws-num {
  width: 22px; height: 22px; border-radius: 50%;
  background: var(--muted); color: var(--foreground-secondary);
  display: inline-flex; align-items: center; justify-content: center;
  font-size: 12px; font-weight: 600;
}
.wizard-step.active .ws-num { background: var(--primary); color: #fff; }
.wizard-step.done .ws-num { background: var(--foreground-secondary); color: #fff; }

.wizard-panel { padding: 8px 2px 24px; }
.wizard-section-title {
  font-size: 15px; font-weight: 600; margin: 26px 0 12px;
  padding-bottom: 8px;
  border-bottom: 1px solid var(--border);
}
.wizard-hint { font-weight: 400; font-size: 12px; color: var(--foreground-tertiary); margin-left: 6px; }

.form-grid {
  display: grid; grid-template-columns: repeat(auto-fill, minmax(280px, 1fr)); gap: 10px 16px;
  background: var(--background-subtle); border: 1px solid var(--border);
  border-radius: var(--radius); padding: 14px;
}
.form-item { display: flex; flex-direction: column; gap: 4px; }
.form-item.wide { grid-column: 1 / -1; }
.form-label { font-size: 12px; color: var(--foreground-tertiary); }
.form-input, .form-select, .form-textarea {
  border: 1px solid var(--border-strong); border-radius: var(--radius-sm);
  padding: 7px 10px; font-size: 14px; background: var(--background); color: var(--foreground);
  width: 100%; font-family: inherit;
}
.form-input:focus, .form-select:focus, .form-textarea:focus {
  outline: none; border-color: var(--primary); box-shadow: 0 0 0 2px var(--primary-subtle);
}
.form-textarea { min-height: 56px; resize: vertical; }
.fin-pair { display: flex; gap: 8px; }
.fin-cell { flex: 1; display: flex; align-items: center; gap: 6px; }
.fin-cell span { font-size: 12px; color: var(--foreground-tertiary); white-space: nowrap; }
.form-check-row { display: flex; flex-wrap: wrap; gap: 4px 14px; padding-top: 6px; }
.form-check-row label { display: inline-flex; align-items: center; gap: 5px; font-size: 13px; cursor: pointer; }
.form-check-row input[type="checkbox"] { accent-color: var(--primary); }

.scene-check-grid {
  display: grid; grid-template-columns: repeat(auto-fill, minmax(230px, 1fr)); gap: 6px 14px;
  background: var(--background-subtle); border: 1px solid var(--border);
  border-radius: var(--radius); padding: 12px 14px;
}
.scene-check-grid label {
  display: inline-flex; align-items: center; gap: 6px; font-size: 13px; cursor: pointer;
  padding: 3px 4px; border-radius: 4px;
}
.scene-check-grid label:hover { background: var(--muted); }
.scene-check-grid input[type="checkbox"] { accent-color: var(--primary); }

.wizard-actions { display: flex; gap: 10px; margin-top: 18px; }
.wizard-actions.center { justify-content: center; }
.btn-primary {
  border: none; background: var(--primary); color: #fff; border-radius: var(--radius-sm);
  padding: 9px 20px; font-size: 14px; font-weight: 500; cursor: pointer; font-family: inherit;
  transition: background .12s;
}
.btn-primary:hover { background: #175a9e; }
.btn-primary:disabled { opacity: .5; cursor: not-allowed; }
.btn-ghost {
  border: 1px solid var(--border-strong); background: var(--background); color: var(--foreground);
  border-radius: var(--radius-sm); padding: 9px 18px; font-size: 14px; cursor: pointer; font-family: inherit;
  transition: background .12s, border-color .12s;
}
.btn-ghost:hover { background: var(--muted); border-color: var(--foreground-tertiary); }

/* 居中弹窗卡片（提示/确认，替代浏览器原生 alert/confirm；参考豆包：页面正中 + 底部按钮）
   遮罩复用 .modal-mask，见上方"知识库弹窗"一节 */
.ui-dialog {
  width: 100%; max-width: 360px; padding: 22px 22px 16px;
  background: var(--background); border-radius: var(--radius-lg);
  box-shadow: 0 12px 40px rgba(0, 0, 0, 0.18);
  text-align: center;
}
.ui-dialog-body { font-size: 14px; line-height: 1.65; color: var(--foreground); word-break: break-word; }
.ui-dialog-actions { display: flex; gap: 10px; margin-top: 18px; }
.ui-dialog-actions button { flex: 1; }

.score-card {
  border: 1px solid var(--border); border-radius: var(--radius); margin-bottom: 12px; overflow: hidden;
}
.score-card-head {
  display: flex; justify-content: space-between; align-items: center;
  padding: 10px 14px; background: var(--background-subtle); font-weight: 600; font-size: 14px;
}
.score-card-head .score-val { color: var(--primary); font-weight: 700; }
.score-items { padding: 8px 14px; }
.score-item {
  display: grid; grid-template-columns: 1fr 140px 90px; gap: 10px; align-items: center;
  padding: 6px 0; border-bottom: 1px dashed var(--border); font-size: 13px;
}
.score-item:last-child { border-bottom: none; }
.score-item .si-name { color: var(--foreground); }
.score-item .si-max { color: var(--foreground-tertiary); font-size: 12px; }
.score-total {
  text-align: right; font-size: 15px; font-weight: 600; margin: 4px 0 14px; color: var(--foreground);
}
.score-total .total-val { color: var(--primary); font-size: 20px; font-weight: 700; }

.scene-table { width: 100%; border-collapse: collapse; font-size: 13px; }
.scene-table th, .scene-table td {
  border: 1px solid var(--border); padding: 6px 8px; text-align: left; vertical-align: middle;
}
.scene-table th { background: var(--background-subtle); font-weight: 600; white-space: nowrap; }
.scene-table input[type="text"] { width: 100%; border: 1px solid var(--border-strong); border-radius: 4px; padding: 4px 6px; font-size: 13px; font-family: inherit; }
.scene-table input[type="text"]:focus { outline: none; border-color: var(--primary); }
.scene-table select { border: 1px solid var(--border-strong); border-radius: 4px; padding: 3px 6px; font-size: 13px; font-family: inherit; }
/* 33 场景表列宽：场景名不换行；输入列给最小宽避免窄列塌陷（总宽按 1920 屏可无横向滚动压校） */
.scene-table td:first-child { white-space: nowrap; font-weight: 500; }
.scene-table td:nth-child(4) input[type="text"] { min-width: 185px; }   /* 模型名称/使用描述 */
.scene-table td:nth-child(5) input[type="text"],
.scene-table td:nth-child(6) input[type="text"],
.scene-table td:nth-child(7) input[type="text"] { min-width: 100px; }   /* 设备/系统/网络 */
.scene-table td:nth-child(8) select { min-width: 88px; }                /* 部署方式 */
.scene-table td:nth-child(9) input[type="text"] { min-width: 150px; }   /* 建设成效 */
.scene-table td:nth-child(10) input[type="text"] { min-width: 165px; }  /* 存在不足 */

.level-hint {
  margin-top: 12px; padding: 10px 14px; border-radius: var(--radius-sm);
  background: var(--primary-subtle); border: 1px solid var(--primary-border);
  font-size: 13px; color: var(--reference-foreground); line-height: 1.8;
}

.search-status { margin-top: 10px; font-size: 13px; color: var(--foreground-tertiary); }
/* 搜索自动筛选摘要（替代人工逐条勾选） */
.filter-summary {
  display: flex; align-items: center; justify-content: space-between; gap: 12px;
  padding: 12px 16px; margin-bottom: 12px;
  background: var(--background-subtle);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  font-size: 13.5px;
  color: var(--foreground-secondary);
}
.filter-summary b { color: var(--primary); }
.btn-link {
  border: none; background: none; cursor: pointer; padding: 0;
  color: var(--primary); font-size: 13px; font-family: inherit; white-space: nowrap;
}
.btn-link:hover { text-decoration: underline; }
.filter-reason { margin-left: 8px; font-size: 11.5px; color: var(--foreground-tertiary); }
.finding-card {
  border: 1px solid var(--border); border-radius: var(--radius); padding: 12px 14px; margin-top: 10px;
}
.finding-head { display: flex; align-items: center; gap: 8px; font-size: 13px; }
.finding-head .f-query { font-weight: 600; }
.finding-type {
  font-size: 11px; padding: 1px 6px; border-radius: 2px; background: var(--muted); color: var(--foreground-secondary);
}
.finding-purpose { color: var(--foreground-tertiary); font-size: 12px; margin-left: 4px; }
.finding-results { margin-top: 8px; display: flex; flex-direction: column; gap: 6px; }
.finding-result {
  display: flex; gap: 8px; align-items: flex-start; font-size: 13px;
  padding: 6px 8px; border-radius: 6px; background: var(--background-subtle);
}
.finding-result input[type="checkbox"] { accent-color: var(--primary); margin-top: 3px; }
.finding-result .fr-main { flex: 1; }
.finding-result .fr-title { font-weight: 500; }
.finding-result .fr-snippet { color: var(--foreground-tertiary); font-size: 12px; }
.src-tag {
  font-size: 11px; padding: 1px 7px; border-radius: 4px; white-space: nowrap;
}
.src-tag.l1 { background: rgba(30, 111, 196, .12); color: #1e6fc4; border: 1px solid rgba(30, 111, 196, .3); }
.src-tag.l2 { background: rgba(0, 128, 0, .08); color: #2e7d32; border: 1px solid rgba(0, 128, 0, .25); }
.src-tag.l3 { background: rgba(255, 152, 0, .10); color: #b26a00; border: 1px solid rgba(255, 152, 0, .3); }
.src-tag.l4 { background: var(--muted); color: var(--foreground-tertiary); border: 1px solid var(--border); }

.gen-row { display: flex; align-items: center; gap: 12px; margin: 10px 0; flex-wrap: wrap; }
.gen-status { font-size: 13px; color: var(--foreground-tertiary); }
.gen-status.ok { color: #2e7d32; }
.gen-status.err { color: #c62828; }
/* 生成期间的实时进度区（始终可见，生成结束隐藏） */
.gen-progress {
  display: flex; align-items: center; gap: 10px;
  padding: 12px 16px;
  margin-bottom: 14px;
  background: var(--background-subtle);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  font-size: 13.5px;
  color: var(--foreground-secondary);
}
.gen-progress::before {
  content: "";
  flex: none;
  width: 14px; height: 14px;
  border: 2px solid var(--primary-subtle);
  border-top-color: var(--primary);
  border-radius: 50%;
  animation: gen-spin 0.8s linear infinite;
}
@keyframes gen-spin { to { transform: rotate(360deg); } }
@media (prefers-reduced-motion: reduce) {
  .gen-progress::before { animation: none; border-top-color: var(--primary); }
}
.gen-result {
  margin-top: 14px; max-height: 420px; overflow-y: auto;
  border: 1px solid var(--border); border-radius: var(--radius); padding: 12px 16px;
  font-size: 13px; background: var(--background-subtle);
}
.gen-result h4 { margin: 14px 0 6px; color: var(--foreground); font-size: 14px; }
.gen-result h4:first-child { margin-top: 0; }
.gen-result ul { margin: 2px 0 6px 18px; }