/* ==================== 全局重置 ==================== */
* { margin: 0; padding: 0; box-sizing: border-box; }
:root {
  --primary: #4f6ef7;
  --primary-dark: #3a54d4;
  --bg: #f5f7fb;
  --panel: #ffffff;
  --border: #e4e7ed;
  --text: #1f2937;
  --text-2: #6b7280;
  --success: #10b981;
  --danger: #ef4444;
  --warning: #f59e0b;
  --shadow: 0 2px 8px rgba(0,0,0,0.06);
  --radius: 8px;
}
html, body { height: 100%; font-family: -apple-system, "Segoe UI", "PingFang SC", "Microsoft YaHei", sans-serif; color: var(--text); background: var(--bg); font-size: 14px; }
a { text-decoration: none; color: inherit; }
button { cursor: pointer; font-family: inherit; }
input, textarea, select { font-family: inherit; outline: none; }

/* ==================== 布局 ==================== */
#app { display: grid; grid-template-columns: 220px 1fr; grid-template-rows: 56px 1fr; grid-template-areas: "sidebar topbar" "sidebar main"; height: 100vh; }
#sidebar { grid-area: sidebar; background: #1e293b; color: #cbd5e1; display: flex; flex-direction: column; overflow-y: auto; }
#topbar { grid-area: topbar; background: var(--panel); border-bottom: 1px solid var(--border); display: flex; align-items: center; justify-content: space-between; padding: 0 20px; }
#main-content { grid-area: main; overflow-y: auto; padding: 20px; }

/* ==================== 侧边栏 ==================== */
.logo { display: flex; align-items: center; gap: 10px; padding: 18px 20px; border-bottom: 1px solid #334155; }
.logo-icon { font-size: 22px; }
.logo-text { font-size: 16px; font-weight: 600; color: #fff; }
#nav-menu { display: flex; flex-direction: column; padding: 12px 0; }
.nav-item { display: flex; align-items: center; gap: 12px; padding: 12px 20px; color: #cbd5e1; transition: all .2s; border-left: 3px solid transparent; }
.nav-item:hover { background: #334155; color: #fff; }
.nav-item.active { background: #334155; color: #fff; border-left-color: var(--primary); }
.nav-icon { font-size: 18px; }

/* ==================== 顶部栏 ==================== */
.breadcrumb { font-size: 15px; font-weight: 600; }
.topbar-actions { display: flex; align-items: center; gap: 16px; }
.service-status { display: flex; gap: 6px; }
.service-status .dot { width: 10px; height: 10px; border-radius: 50%; background: #d1d5db; }
.service-status .dot.ok { background: var(--success); box-shadow: 0 0 6px var(--success); }
.service-status .dot.error { background: var(--danger); box-shadow: 0 0 6px var(--danger); }
.user-info { color: var(--text-2); }

/* ==================== 按钮 ==================== */
.btn { display: inline-flex; align-items: center; gap: 6px; padding: 8px 16px; border: none; border-radius: var(--radius); font-size: 13px; transition: all .2s; }
.btn-primary { background: var(--primary); color: #fff; }
.btn-primary:hover { background: var(--primary-dark); }
.btn-default { background: #f3f4f6; color: var(--text); }
.btn-default:hover { background: #e5e7eb; }
.btn-danger { background: var(--danger); color: #fff; }
.btn-success { background: var(--success); color: #fff; }
.btn-warning { background: var(--warning); color: #fff; }
.btn-sm { padding: 5px 10px; font-size: 12px; }
.btn:disabled { opacity: .5; cursor: not-allowed; }

/* ==================== 卡片 ==================== */
.card { background: var(--panel); border-radius: var(--radius); box-shadow: var(--shadow); padding: 16px; margin-bottom: 16px; }
.card-title { font-size: 15px; font-weight: 600; margin-bottom: 12px; display: flex; align-items: center; justify-content: space-between; }

/* ==================== 表格 ==================== */
table { width: 100%; border-collapse: collapse; }
th, td { text-align: left; padding: 10px 12px; border-bottom: 1px solid var(--border); }
th { background: #f9fafb; font-weight: 600; color: var(--text-2); font-size: 13px; }
tr:hover td { background: #f9fafb; }

/* ==================== 表单 ==================== */
.form-group { margin-bottom: 14px; }
.form-label { display: block; margin-bottom: 6px; font-size: 13px; color: var(--text-2); }
.form-control { width: 100%; padding: 8px 12px; border: 1px solid var(--border); border-radius: 6px; font-size: 13px; }
.form-control:focus { border-color: var(--primary); }
.form-row { display: flex; gap: 12px; }
.form-row .form-group { flex: 1; }

/* ==================== 标签 ==================== */
.tag { display: inline-block; padding: 2px 8px; border-radius: 4px; font-size: 12px; }
.tag-blue { background: #dbeafe; color: #1e40af; }
.tag-green { background: #d1fae5; color: #065f46; }
.tag-red { background: #fee2e2; color: #991b1b; }
.tag-yellow { background: #fef3c7; color: #92400e; }
.tag-gray { background: #f3f4f6; color: #374151; }

/* ==================== Toast ==================== */
#toast-container { position: fixed; top: 70px; right: 20px; z-index: 9999; display: flex; flex-direction: column; gap: 8px; }
.toast { padding: 10px 16px; border-radius: 6px; color: #fff; box-shadow: 0 4px 12px rgba(0,0,0,0.15); animation: slideIn .3s; max-width: 360px; }
.toast-success { background: var(--success); }
.toast-error { background: var(--danger); }
.toast-info { background: var(--primary); }
@keyframes slideIn { from { transform: translateX(100%); opacity: 0; } to { transform: translateX(0); opacity: 1; } }

/* ==================== Modal ==================== */
.modal-overlay { position: fixed; inset: 0; background: rgba(0,0,0,0.4); z-index: 1000; display: flex; align-items: center; justify-content: center; }
.modal-overlay.hidden { display: none; }
.modal { background: #fff; border-radius: var(--radius); padding: 20px; min-width: 380px; box-shadow: 0 10px 40px rgba(0,0,0,0.2); }
.modal-title { font-size: 16px; font-weight: 600; margin-bottom: 12px; }
.modal-body { color: var(--text-2); margin-bottom: 20px; }
.modal-footer { display: flex; justify-content: flex-end; gap: 10px; }

/* ==================== 聊天模块 ==================== */
.chat-layout { display: grid; grid-template-columns: 240px 1fr 300px; gap: 16px; height: calc(100vh - 96px); }
.chat-sessions { background: var(--panel); border-radius: var(--radius); box-shadow: var(--shadow); display: flex; flex-direction: column; overflow: hidden; }
.chat-sessions-header { padding: 12px; border-bottom: 1px solid var(--border); display: flex; justify-content: space-between; align-items: center; }
.session-list { flex: 1; overflow-y: auto; }
.session-item { padding: 10px 12px; border-bottom: 1px solid #f3f4f6; cursor: pointer; display: flex; align-items: center; gap: 8px; }
.session-item:hover { background: #f9fafb; }
.session-item.active { background: #eff6ff; }
.session-title { font-size: 13px; font-weight: 500; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.session-meta { font-size: 11px; color: var(--text-2); margin-top: 2px; }
.session-delete-btn { flex-shrink: 0; padding: 2px 8px; font-size: 11px; opacity: 0.7; }
.session-item:hover .session-delete-btn { opacity: 1; }

.chat-main { background: var(--panel); border-radius: var(--radius); box-shadow: var(--shadow); display: flex; flex-direction: column; overflow: hidden; }
.chat-messages { flex: 1; overflow-y: auto; padding: 16px; display: flex; flex-direction: column; gap: 16px; }
.msg { display: flex; gap: 10px; max-width: 80%; }
.msg.user { align-self: flex-end; flex-direction: row-reverse; }
.msg-avatar { width: 32px; height: 32px; border-radius: 50%; display: flex; align-items: center; justify-content: center; font-size: 16px; flex-shrink: 0; }
.msg.user .msg-avatar { background: var(--primary); color: #fff; }
.msg.assistant .msg-avatar { background: #e0e7ff; color: var(--primary); }
.msg-bubble { padding: 10px 14px; border-radius: 10px; line-height: 1.6; }
.msg.user .msg-bubble { background: var(--primary); color: #fff; }
.msg.assistant .msg-bubble { background: #f3f4f6; }
.chat-input-area { border-top: 1px solid var(--border); padding: 12px; }
.chat-input { width: 100%; min-height: 60px; padding: 10px; border: 1px solid var(--border); border-radius: 8px; resize: vertical; }
.chat-input-actions { display: flex; justify-content: space-between; margin-top: 8px; }

.chat-tools { background: var(--panel); border-radius: var(--radius); box-shadow: var(--shadow); padding: 12px; overflow-y: auto; }
.tool-call-item {
  display: flex; align-items: center; gap: 10px;
  padding: 6px 8px; border-radius: 6px; margin-bottom: 6px; background: #f9fafb;
}
.tool-call-time { color: var(--text-2); font-size: 12px; font-variant-numeric: tabular-nums; }
.tool-call-name { font-weight: 600; font-size: 13px; }
.panel-empty { color: var(--text-2); font-size: 12px; line-height: 1.6; }
.panel-title { display: flex; align-items: center; }
.thinking-intent { margin-left: 8px; font-size: 11px; font-weight: 400; }
.thinking-block { margin-bottom: 16px; }
.thinking-label {
  display: flex; align-items: center; gap: 6px;
  font-size: 11px; color: var(--text-2); letter-spacing: .5px; margin-bottom: 6px;
}
.thinking-label::before {
  content: ""; width: 6px; height: 6px; border-radius: 50%; background: var(--primary);
}
.thinking-requirement {
  background: #f8fafc; border: 1px solid var(--border); border-radius: 8px;
  padding: 10px 12px; font-size: 13px; line-height: 1.65; word-break: break-word;
}
.thinking-plan {
  counter-reset: step; list-style: none; margin: 0; padding: 0;
  font-size: 13px; line-height: 1.6;
}
.thinking-plan li {
  position: relative; padding-left: 26px; margin-bottom: 8px; word-break: break-word;
}
.thinking-plan li:last-child { margin-bottom: 0; }
.thinking-plan li::before {
  counter-increment: step; content: counter(step);
  position: absolute; left: 0; top: 2px;
  width: 18px; height: 18px; border-radius: 50%;
  background: var(--primary); color: #fff;
  font-size: 11px; line-height: 18px; text-align: center;
}
.tool-calls-details { margin-top: 14px; border-top: 1px solid var(--border); padding-top: 8px; }
.tool-calls-details[hidden] { display: none; }
.tool-calls-details summary { cursor: pointer; font-size: 12px; color: var(--text-2); user-select: none; margin-bottom: 6px; }
.settings-card {
  background: #f8fafc; border: 1px solid var(--border); border-radius: 8px;
  padding: 4px 12px; margin-bottom: 14px;
}
.switch-row {
  display: flex; align-items: center; gap: 8px;
  padding: 7px 0; font-size: 13px; cursor: pointer;
}
.switch-row + .switch-row { border-top: 1px solid #eef1f5; }
.settings-label {
  display: flex; align-items: center; padding: 7px 0; font-size: 13px;
}
.settings-label small { margin-left: auto; color: var(--text-2); font-size: 11px; }
.mcp-options + .switch-row { border-top: 1px solid #eef1f5; }
.mcp-row { padding-left: 18px; }
.mcp-options .panel-empty { padding: 2px 0 7px 18px; }
.budget-line {
  margin-top: 6px; padding-top: 7px; border-top: 1px solid #eef1f5;
  font-size: 12px; color: var(--text-2);
}
.budget-line.exhausted { color: var(--danger); }
.audit-group { border-top: 1px solid var(--border); padding: 4px 0; }
.audit-group summary { cursor: pointer; padding: 8px 0; font-size: 13px; user-select: none; }
.switch-row input { width: 15px; height: 15px; accent-color: var(--primary); cursor: pointer; }
.switch-row small { margin-left: auto; color: var(--text-2); font-size: 11px; }
.panel-section { margin-top: 14px; border-top: 1px solid var(--border); padding-top: 10px; }
.panel-section[hidden] { display: none; }
.file-row {
  display: flex; align-items: center; gap: 8px;
  padding: 8px 0; border-bottom: 1px solid #f3f4f6;
}
.file-row:last-child { border-bottom: none; }
.file-name {
  flex: 1; min-width: 0; overflow: hidden; text-overflow: ellipsis;
  white-space: nowrap; font-size: 12px;
}
.file-meta { color: var(--text-2); font-size: 11px; flex-shrink: 0; }
.load-earlier { text-align: center; padding: 8px 0 14px; }
.files-title { display: flex; align-items: center; gap: 8px; }
.files-title #files-zip { margin-left: auto; }
.file-preview {
  background: none; border: none; padding: 0; margin: 0;
  font: inherit; color: var(--text); cursor: pointer; text-align: left;
}
.file-preview:hover { color: var(--primary); text-decoration: underline; }
.preview-overlay {
  position: fixed; inset: 0; z-index: 1000;
  background: rgba(15, 23, 42, .45);
  display: flex; align-items: center; justify-content: center; padding: 24px;
}
.preview-overlay.hidden { display: none; }
.preview-box {
  background: var(--panel); border-radius: 10px; overflow: hidden;
  box-shadow: 0 12px 32px rgba(0, 0, 0, .18);
  width: min(900px, 100%); max-height: 85vh;
  display: flex; flex-direction: column;
}
.preview-head {
  display: flex; align-items: center; justify-content: space-between; gap: 12px;
  padding: 12px 16px; border-bottom: 1px solid var(--border);
}
.preview-body {
  margin: 0; padding: 16px; overflow: auto; background: #fafbfc;
  white-space: pre-wrap; word-break: break-word; font-size: 13px; line-height: 1.6;
}

/* ==================== 文档中心 ==================== */
.doc-tabs { display: flex; gap: 4px; margin-bottom: 16px; border-bottom: 1px solid var(--border); }
.doc-tab { padding: 10px 18px; cursor: pointer; border-bottom: 2px solid transparent; font-weight: 500; }
.doc-tab.active { border-bottom-color: var(--primary); color: var(--primary); }
.doc-layout { display: grid; grid-template-columns: 260px 1fr; gap: 16px; height: calc(100vh - 180px); }
.project-tree { background: var(--panel); border-radius: var(--radius); box-shadow: var(--shadow); overflow-y: auto; }
.project-tree-item { padding: 10px 14px; cursor: pointer; border-bottom: 1px solid #f3f4f6; }
.project-tree-item:hover { background: #f9fafb; }
.project-tree-item.active { background: #eff6ff; }
.project-tree-name { font-weight: 500; }
.project-tree-count { font-size: 11px; color: var(--text-2); }
.doc-list { background: var(--panel); border-radius: var(--radius); box-shadow: var(--shadow); overflow-y: auto; }

/* 入库流程监控 */
.flow-steps { display: flex; gap: 12px; flex-wrap: wrap; margin-bottom: 20px; }
.flow-step { flex: 1; min-width: 140px; background: var(--panel); border-radius: var(--radius); padding: 16px; box-shadow: var(--shadow); text-align: center; border-top: 3px solid var(--primary); }
.flow-step-num { font-size: 24px; font-weight: 700; color: var(--primary); }
.flow-step-name { font-size: 13px; font-weight: 600; margin: 6px 0; }
.flow-step-desc { font-size: 11px; color: var(--text-2); }
.storage-arch { display: grid; grid-template-columns: repeat(3, 1fr); gap: 12px; }
.storage-layer { background: var(--panel); border-radius: var(--radius); padding: 14px; box-shadow: var(--shadow); }
.storage-layer-title { font-weight: 600; margin-bottom: 8px; }
.storage-layer-meta { font-size: 12px; color: var(--text-2); }

/* ==================== 检索中心 ==================== */
.search-bar { display: flex; gap: 10px; margin-bottom: 16px; }
.search-bar input { flex: 1; padding: 10px 14px; border: 1px solid var(--border); border-radius: 8px; }
.search-filters { display: flex; gap: 10px; margin-bottom: 16px; align-items: center; flex-wrap: wrap; }
.search-result { background: var(--panel); border-radius: var(--radius); padding: 14px; box-shadow: var(--shadow); margin-bottom: 10px; }
.search-result-score { display: inline-block; padding: 2px 8px; background: #dbeafe; color: #1e40af; border-radius: 4px; font-size: 12px; font-weight: 600; }
.search-result-meta { font-size: 12px; color: var(--text-2); margin: 6px 0; }
.search-result-text { line-height: 1.6; color: var(--text); }

/* ==================== 系统管理 ==================== */
.sys-tabs { display: flex; gap: 4px; margin-bottom: 16px; border-bottom: 1px solid var(--border); flex-wrap: wrap; }
.sys-tab { padding: 10px 16px; cursor: pointer; border-bottom: 2px solid transparent; font-weight: 500; font-size: 13px; }
.sys-tab.active { border-bottom-color: var(--primary); color: var(--primary); }
.stat-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(180px, 1fr)); gap: 12px; }
.stat-card { background: var(--panel); border-radius: var(--radius); padding: 16px; box-shadow: var(--shadow); }
.stat-value { font-size: 24px; font-weight: 700; color: var(--primary); }
.stat-label { font-size: 12px; color: var(--text-2); margin-top: 4px; }

/* 工具状态网格 */
.tool-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(200px, 1fr)); gap: 10px; }
.tool-card { background: var(--panel); border-radius: 6px; padding: 10px; box-shadow: var(--shadow); display: flex; align-items: center; gap: 8px; }

/* ===== Markdown 正文样式（AI 回复） ===== */
.markdown-body { word-break: break-word; }
.markdown-body > *:first-child { margin-top: 0; }
.markdown-body > *:last-child { margin-bottom: 0; }
.markdown-body p { margin: 6px 0; line-height: 1.7; }
.markdown-body h1, .markdown-body h2, .markdown-body h3,
.markdown-body h4, .markdown-body h5, .markdown-body h6 {
  margin: 12px 0 6px; font-weight: 600; line-height: 1.3;
}
.markdown-body h1 { font-size: 1.5em; }
.markdown-body h2 { font-size: 1.3em; }
.markdown-body h3 { font-size: 1.15em; }
.markdown-body ul, .markdown-body ol { margin: 6px 0; padding-left: 24px; }
.markdown-body li { margin: 3px 0; line-height: 1.6; }
.markdown-body blockquote {
  margin: 8px 0; padding: 6px 12px; border-left: 3px solid var(--primary);
  background: rgba(99,102,241,0.06); color: var(--text-2); border-radius: 0 4px 4px 0;
}
.markdown-body code {
  background: rgba(0,0,0,0.08); padding: 1px 5px; border-radius: 3px;
  font-family: "Consolas", "Monaco", monospace; font-size: 0.9em;
}
.markdown-body pre {
  background: #1e293b; color: #e2e8f0; padding: 10px 12px; border-radius: 6px;
  overflow-x: auto; margin: 8px 0;
}
.markdown-body pre code {
  background: transparent; padding: 0; color: inherit; font-size: 0.85em;
}
.markdown-body table {
  border-collapse: collapse; margin: 8px 0; width: 100%; font-size: 0.9em;
}
.markdown-body th, .markdown-body td {
  border: 1px solid #d1d5db; padding: 6px 10px; text-align: left;
}
.markdown-body th { background: #f3f4f6; font-weight: 600; }
.markdown-body a { color: var(--primary); text-decoration: underline; }
.markdown-body hr { border: none; border-top: 1px solid #d1d5db; margin: 12px 0; }
.markdown-body img { max-width: 100%; border-radius: 4px; }
.markdown-body strong { font-weight: 600; }
.tool-status-dot { width: 8px; height: 8px; border-radius: 50%; }
.tool-status-dot.ok { background: var(--success); }
.tool-status-dot.error { background: var(--danger); }

/* 配置表单 */
.config-section { margin-bottom: 20px; }
.config-section-title { font-size: 14px; font-weight: 600; margin-bottom: 12px; padding-bottom: 8px; border-bottom: 1px solid var(--border); }

/* 账号页额度仪表板 */
.quota-label { font-size: 13px; color: var(--text-2); }
.quota-number { font-size: 32px; font-weight: 600; line-height: 1.2; margin: 4px 0 2px; }
.quota-unit { font-size: 14px; font-weight: 400; color: var(--text-2); }
.quota-sub { font-size: 13px; color: var(--text-2); }
.quota-bar {
  margin-top: 12px; height: 8px; border-radius: 4px;
  background: var(--bg); border: 1px solid var(--border); overflow: hidden;
}
.quota-fill { height: 100%; background: var(--primary); border-radius: 4px 0 0 4px; }
.quota-fill.exhausted { background: var(--danger); }

/* 首对话指引 */
.chat-guide { max-width: 640px; margin: 28px auto; padding: 8px 20px 24px; }
.guide-title { font-size: 22px; font-weight: 600; margin-bottom: 8px; }
.guide-intro { color: var(--text-2); margin-bottom: 20px; line-height: 1.6; }
.guide-steps { display: flex; flex-direction: column; gap: 10px; margin-bottom: 22px; }
.guide-step { display: flex; gap: 10px; align-items: flex-start; font-size: 14px; line-height: 1.6; }
.guide-num {
  flex: none; width: 22px; height: 22px; border-radius: 50%;
  background: var(--primary); color: #fff;
  display: flex; align-items: center; justify-content: center; font-size: 12px;
}
.guide-prompts-label { font-size: 13px; color: var(--text-2); margin-bottom: 8px; }
.guide-prompts { display: flex; flex-wrap: wrap; gap: 8px; }
.guide-prompts button {
  border: 1px solid var(--border); background: var(--panel); color: var(--text);
  border-radius: 16px; padding: 6px 14px; font-size: 13px; cursor: pointer;
}
.guide-prompts button:hover { border-color: var(--primary); color: var(--primary); }
.guide-tip { margin-top: 20px; font-size: 12px; color: var(--text-2); line-height: 1.6; }

/* 响应式 */
@media (max-width: 1024px) {
  .chat-layout { grid-template-columns: 200px 1fr; }
  .chat-tools { display: none; }
}
@media (max-width: 768px) {
  #app { grid-template-columns: 60px 1fr; }
  .logo-text, .nav-item span:not(.nav-icon) { display: none; }
  .doc-layout { grid-template-columns: 1fr; }
}