/* ═══ 智能客服 · 用户端 · 高亮白 + AI 科技蓝 ═══ */
:root {
  /* 品牌色：深蓝渐变 */
  --brand: #1e40af;
  --brand-2: #1e3a8a;
  --brand-dark: #172554;
  --accent: #1e3a8a;
  --accent-2: #38bdf8;
  --brand-soft: #dbeafe;
  --accent-soft: #eff6ff;

  /* 语义色（白底可读） */
  --ok: #059669;    --ok-bg: #ecfdf5;
  --warn: #d97706;  --warn-bg: #fffbeb;
  --err: #dc2626;   --err-bg: #fef2f2;
  --danger: #dc2626;  /* app.js 中 var(--danger) 别名 */

  /* 背景 & 文字 */
  --bg: #f5f8fc;
  --bg-grid: rgba(203, 213, 225, 0.35);
  --card: #ffffff;
  --line: #dbe3f0;
  --line-light: #eef3fa;
  --text: #0b1526;
  --text-2: #1e293b;
  --text-3: #51607a;
  --muted: #94a3b8;

  /* 效果 */
  --shadow: 0 1px 2px rgba(11,21,38,.06), 0 4px 16px rgba(11,21,38,.08);
  --shadow-lg: 0 8px 32px rgba(30,64,175,.16), 0 2px 8px rgba(11,21,38,.06);
  --glow: 0 0 20px rgba(30,64,175,.24);
  --radius: 14px;
}
* { box-sizing: border-box; }
html, body {
  height: 100%; margin: 0;
  font-family: "Segoe UI", "PingFang SC", "Microsoft YaHei", sans-serif;
  color: var(--text); background: var(--bg); font-size: 14px;
}
.required { color: var(--err); }

/* 柔和光晕背景（无网格） */
body::before {
  content: ""; position: fixed; inset: 0; z-index: 0; pointer-events: none;
  background-image:
    radial-gradient(ellipse 760px 420px at 12% -6%, rgba(30,64,175,.10), transparent 62%),
    radial-gradient(ellipse 640px 420px at 98% 2%, rgba(56,189,248,.08), transparent 60%);
}
#app-shell, #login-wall, #main-app { position: relative; z-index: 1; }

/* ═══ 应用外壳 ═══ */
#app-shell { width: 100%; }
#login-wall { display: block; }
#main-app { display: none; }
.logged-in #login-wall { display: none !important; }
.logged-in #main-app { display: flex !important; }

/* ═══ 登录 / 注册页 ═══ */
#login-wall {
  height: 100vh; display: flex; align-items: center; justify-content: center;
  padding: 20px;
}
.login-card {
  position: relative;
  background: var(--card); border: 1px solid var(--line); border-radius: 20px;
  padding: 38px 42px; width: 420px; max-width: 94vw;
  box-shadow: var(--shadow-lg);
  overflow: hidden;
}
.login-card::before {
  content: ""; position: absolute; top: 0; left: 0; right: 0; height: 3px;
  background: linear-gradient(90deg, var(--brand), var(--accent-2), var(--brand));
  background-size: 200% 100%; animation: brandSlide 6s linear infinite;
}
@keyframes brandSlide { to { background-position: 200% 0; } }
.login-brand { font-size: 22px; font-weight: 700; display: flex; align-items: center; gap: 8px; margin-bottom: 6px; }
.login-mark {
  background: linear-gradient(135deg, var(--brand), var(--accent)); color: #fff;
  border-radius: 8px; padding: 3px 10px; font-size: 13px; font-weight: 700;
  box-shadow: var(--glow); letter-spacing: 1px;
}
.login-sub { font-size: 12.5px; color: var(--text-3); margin: 6px 0 20px; line-height: 1.6; }
#f-login, #f-register { display: flex; flex-direction: column; gap: 14px; }
#f-login label, #f-register label { font-size: 12.5px; color: var(--text-3); display: flex; flex-direction: column; gap: 6px; font-weight: 500; }
#f-login input, #f-register input, #f-register select {
  padding: 11px 14px; border: 1px solid var(--line); border-radius: 10px;
  font-size: 13.5px; background: var(--bg); outline: none; transition: all .15s;
}
#f-login input:focus, #f-register input:focus, #f-register select:focus {
  border-color: var(--brand); background: #fff; box-shadow: 0 0 0 3px rgba(30,64,175,.12);
}
#f-login button, #f-register button { margin-top: 4px; padding: 11px; font-size: 14px; font-weight: 600; }
.login-divider { display: flex; align-items: center; gap: 12px; margin: 18px 0; color: var(--muted); font-size: 12px; }
.login-divider::before, .login-divider::after { content: ''; flex: 1; height: 1px; background: var(--line); }
#f-register { display: none; } /* 默认隐藏，JS 控制显示 */
#f-register.show { display: flex; }
.login-hint { font-size: 11px; color: var(--muted); margin: 14px 0 0; line-height: 1.6; text-align: center; }
.btn-primary { background: var(--brand) !important; }

/* 等待审批页 */
.approval-wait { text-align: center; padding: 20px; }
.approval-wait .spinner { margin: 0 auto 16px; }

/* ═══ 顶栏 ═══ */
#main-app { display: flex; flex-direction: column; height: 100vh; overflow: hidden; }
#topbar {
  height: 60px;
  background: rgba(255,255,255,.88); backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--line);
  display: flex; align-items: center; padding: 0 24px; gap: 18px;
  box-shadow: 0 1px 0 rgba(30,64,175,.10), var(--shadow);
  position: relative; z-index: 5;
}
.topbar-brand { display: flex; align-items: center; gap: 9px; font-size: 14px; font-weight: 700; }
.topbar-mark {
  background: linear-gradient(135deg, var(--brand), var(--accent)); color: #fff;
  border-radius: 7px; padding: 3px 9px; font-size: 12px; font-weight: 700;
  box-shadow: var(--glow); letter-spacing: 1px;
}
.topbar-name { font-weight: 600; background: linear-gradient(90deg, var(--brand), var(--accent)); -webkit-background-clip: text; background-clip: text; -webkit-text-fill-color: transparent; }
.topbar-tenant { font-size: 11.5px; color: var(--text-3); font-weight: 400; background: var(--brand-soft); border: 1px solid var(--line); padding: 3px 10px; border-radius: 12px; }
#top-nav { flex: 1; display: flex; gap: 4px; }
#top-nav a {
  text-decoration: none; color: var(--text-3); font-size: 13.5px; font-weight: 500;
  padding: 8px 16px; border-radius: 10px; transition: all .18s;
  position: relative;
}
#top-nav a:hover { background: var(--bg); color: var(--text); }
#top-nav a.active {
  background: var(--brand-soft); color: var(--brand-dark); font-weight: 600;
}
#top-nav a.active::after {
  content: ""; position: absolute; left: 50%; bottom: -12px; transform: translateX(-50%);
  width: 24px; height: 3px; border-radius: 2px;
  background: linear-gradient(90deg, var(--brand), var(--accent-2));
}
.topbar-user { display: flex; align-items: center; gap: 12px; font-size: 12.5px; color: var(--text-3); }
.user-name { max-width: 160px; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }

/* ═══ 状态徽章 ═══ */
.status-pill {
  display: flex; align-items: center; gap: 7px;
  font-size: 12px; font-weight: 600;
  padding: 4px 12px; border-radius: 20px;
  background: var(--warn-bg); color: var(--warn);
  border: 1px solid var(--warn);
}
.status-pill.active { background: var(--ok-bg); color: var(--ok); border-color: var(--ok); }
.status-pill .dot { width: 7px; height: 7px; border-radius: 50%; background: currentColor; }
.status-pill.active .dot { box-shadow: 0 0 6px currentColor; animation: pulse 2s infinite; }
@keyframes pulse { 50% { opacity: .55; } }

/* ═══ 内容区 ═══ */
#content { flex: 1; overflow: auto; min-height: 0; }
.view { padding: 26px 30px; }
.view.hidden { display: none; }
.view.active { display: block; height: 100%; box-sizing: border-box; min-height: 0; }
.muted { color: var(--text-3); font-size: 12.5px; }
.tiny { font-size: 11px; }
.view-head-plain { max-width: 720px; margin-bottom: 18px; }
.view-head-plain h2 { margin: 0 0 5px; font-size: 20px; font-weight: 700; letter-spacing: .3px; }
.view-head-plain p { margin: 0 0 14px; color: var(--text-3); }

/* ═══ 聊天布局 ═══ */
.chat-col { display: flex; gap: 18px; height: 100%; }
.chat-side {
  width: 240px; min-width: 208px; background: var(--card);
  border: 1px solid var(--line); border-radius: var(--radius); padding: 18px;
  display: flex; flex-direction: column; gap: 18px; align-self: flex-start;
  box-shadow: var(--shadow);
}
.side-block { display: flex; flex-direction: column; gap: 8px; }
.side-label { font-size: 12px; color: var(--text-3); font-weight: 600; letter-spacing: .5px; }
.chat-side select {
  width: 100%; padding: 9px 11px; border: 1px solid var(--line);
  border-radius: 8px; font-size: 13px; background: var(--bg); outline: none; color: var(--text);
}
.chat-side select:focus { border-color: var(--brand); background: #fff; }
.btn-block {
  width: 100%; background: #fff; border: 1px solid var(--line); color: var(--text-3);
  border-radius: 9px; padding: 10px; font-size: 13px; cursor: pointer; transition: all .15s;
}
.btn-block:hover { border-color: var(--brand); color: var(--brand); background: var(--brand-soft); }

/* 生成状态盒 */
.gen-status-box {
  background: var(--bg); border: 1px solid var(--line); border-radius: 10px;
  padding: 12px 14px; font-size: 12px; line-height: 1.5;
}
.gen-status-running { display: flex; flex-direction: column; gap: 6px; }
.gen-status-running .spinner.small { width: 16px; height: 16px; border-width: 2px; flex-shrink: 0; }
.gen-status-running .progress-bar { height: 6px; background: var(--line); border-radius: 3px; overflow: hidden; }
.gen-status-running .progress-fill { height: 100%; background: var(--brand); border-radius: 3px; transition: width 0.4s; }
.gen-status-running .muted.tiny { margin: 0; }

.chat-main {
  flex: 1; background: var(--card); border: 1px solid var(--line); border-radius: var(--radius);
  display: flex; flex-direction: column; min-height: 480px; box-shadow: var(--shadow);
}
#chat-log { flex: 1; overflow-y: auto; padding: 22px; display: flex; flex-direction: column; gap: 12px; }
.sys-line { font-size: 12.5px; color: var(--muted); text-align: center; padding: 8px 0; }
.bubble { max-width: 74%; padding: 12px 16px; border-radius: 14px; font-size: 14px; line-height: 1.7; }
.bubble code { background: #eef1f5; padding: 1px 5px; border-radius: 4px; font-size: 13px; }
.bubble.user {
  align-self: flex-end; color: #fff; border-bottom-right-radius: 4px;
  background: linear-gradient(135deg, var(--brand), var(--accent));
  box-shadow: 0 4px 14px rgba(30,64,175,.25);
}
.bubble.user strong { color: #fff; }
.bubble.bot {
  align-self: flex-start; background: var(--bg); border: 1px solid var(--line);
  border-bottom-left-radius: 4px;
}
.bubble.pending { color: var(--muted); font-style: italic; }
.cites { margin-top: 10px; border-top: 1px dashed var(--line); padding-top: 8px; font-size: 12px; color: var(--text-3); }
.cites summary { cursor: pointer; color: var(--brand); font-weight: 500; }
.cites ul { margin: 6px 0 0; padding-left: 18px; }
.cites li { margin-bottom: 3px; word-break: break-all; }
.fb { margin-top: 8px; font-size: 11px; }

.sug-box { display: flex; gap: 8px; flex-wrap: wrap; padding: 0 22px; min-height: 0; }
.chip {
  border: 1px solid var(--line); background: #fff; color: var(--brand-dark);
  font-size: 12.5px; font-weight: 500; padding: 6px 14px; border-radius: 15px; cursor: pointer;
  transition: all .15s;
}
.chip:hover { background: var(--brand-soft); border-color: var(--brand); box-shadow: var(--glow); }
.input-row { display: flex; gap: 8px; padding: 12px 22px 8px; }
.input-row input {
  flex: 1; padding: 11px 15px; border: 1px solid var(--line);
  border-radius: 10px; font-size: 14px; outline: none; background: var(--bg);
  transition: all .15s;
}
.input-row input:focus { border-color: var(--brand); background: #fff; box-shadow: 0 0 0 3px rgba(30,64,175,.12); }
.input-row .ghost { border: 1px solid var(--line); background: #fff; color: var(--text-3); border-radius: 10px; padding: 0 16px; font-size: 13px; }
.input-row .ghost:hover { color: var(--brand); border-color: var(--brand); }
#send-btn {
  background: linear-gradient(135deg, var(--brand), var(--accent)); color: #fff;
  border: none; border-radius: 10px; padding: 0 26px; font-size: 14px; font-weight: 600; cursor: pointer;
  transition: all .15s; box-shadow: 0 2px 10px rgba(30,64,175,.3);
}
#send-btn:hover { transform: translateY(-1px); box-shadow: 0 4px 16px rgba(30,64,175,.4); }
#send-btn:disabled { opacity: .5; cursor: not-allowed; transform: none; box-shadow: none; }
.disclaimer { font-size: 11px; color: var(--muted); margin: 6px 22px 14px; }

/* ═══ 卡片 ═══ */
.card {
  position: relative;
  background: var(--card); border: 1px solid var(--line); border-radius: var(--radius);
  padding: 22px 24px; box-shadow: var(--shadow); margin-bottom: 16px;
  transition: all .2s;
}
.card:hover { box-shadow: var(--shadow-lg); border-color: #d5dbe8; }
.card h3 { margin: 0 0 8px; font-size: 15px; font-weight: 600; }
.card > .muted { margin: 0 0 16px; }

.upload-card { max-width: 720px; }
.upload-zone {
  display: flex; flex-direction: column; align-items: center; justify-content: center;
  border: 2px dashed var(--line); border-radius: 12px; padding: 36px 20px;
  cursor: pointer; transition: all .2s; text-align: center;
}
.upload-zone:hover { border-color: var(--brand); background: var(--brand-soft); }
.upload-icon { font-size: 38px; margin-bottom: 10px; }
.upload-text { font-size: 14px; font-weight: 500; color: var(--text-2); }
.upload-preview { display: flex; align-items: center; gap: 12px; margin-top: 14px; padding: 12px; background: var(--bg); border: 1px solid var(--line); border-radius: 10px; }
.upload-file-info { flex: 1; }
.upload-file-name { font-weight: 600; font-size: 13px; display: block; }
.upload-progress { margin-top: 14px; }
.progress-bar { height: 8px; background: var(--line); border-radius: 4px; overflow: hidden; margin-bottom: 6px; }
.progress-fill {
  height: 100%; border-radius: 4px; transition: width 0.3s;
  background: linear-gradient(90deg, var(--brand), var(--accent-2));
  box-shadow: 0 0 8px rgba(30,64,175,.4);
}

.doc-table { margin-top: 16px; }
.tbl { width: 100%; border-collapse: separate; border-spacing: 0; font-size: 13px; background: var(--card); border: 1px solid var(--line); border-radius: 10px; overflow: hidden; }
.tbl th { text-align: left; font-weight: 600; color: var(--muted); font-size: 12px; padding: 12px 16px; border-bottom: 1px solid var(--line); background: var(--bg); }
.tbl td { padding: 12px 16px; border-bottom: 1px solid var(--line); color: var(--text-2); }
.tbl tbody tr:last-child td { border-bottom: none; }
.tbl tbody tr:hover td { background: var(--brand-soft); }
.pill {
  font-size: 11px; padding: 3px 10px; border-radius: 11px; font-weight: 600;
  background: var(--brand-soft); color: var(--brand-dark);
}
.pill.active { background: var(--ok-bg); color: var(--ok); }
.pill.inactive { background: var(--err-bg); color: var(--err); }

.gen-task-card { max-width: 720px; margin-top: 8px; }
.gen-task-content { display: flex; align-items: center; gap: 12px; padding: 12px 0; }

/* ═══ 工单 ═══ */
.ticket {
  background: var(--card); border: 1px solid var(--line); border-radius: 12px;
  padding: 16px 20px; margin: 12px 0; font-size: 13.5px; box-shadow: var(--shadow);
  max-width: 720px; transition: all .15s;
}
.ticket:hover { box-shadow: var(--shadow-lg); }
.ticket-top { display: flex; align-items: center; gap: 10px; margin-bottom: 8px; }
.st-待处理 { background: var(--warn-bg); color: var(--warn); }
.st-处理中 { background: var(--brand-soft); color: var(--brand-dark); }
.st-已解决 { background: var(--ok-bg); color: var(--ok); }
.ticket p { margin: 5px 0; line-height: 1.6; }
.ticket-grid { display: flex; gap: 20px; align-items: flex-start; }
.ticket-col { flex: 1; min-width: 0; }
.qr-placeholder {
  width: 140px; height: 140px; background: var(--card);
  border: 2px dashed var(--line); border-radius: 12px;
  display: flex; align-items: center; justify-content: center;
  font-size: 48px; position: relative; overflow: hidden;
}
.qr-placeholder::before {
  content: "QR"; font-size: 28px; font-weight: 700; color: var(--brand);
  position: absolute; opacity: .25;
}
.qr-placeholder::after {
  content: ""; position: absolute; inset: 8px;
  background:
    repeating-linear-gradient(0deg, var(--text) 0 8px, transparent 8px 16px),
    repeating-linear-gradient(90deg, var(--text) 0 8px, transparent 8px 16px);
  opacity: .12; border-radius: 6px;
}

/* ═══ 应用配置双栏 ═══ */
.app-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 18px; }
.app-grid .card { display: flex; flex-direction: column; }
.app-grid label { font-size: 12.5px; color: var(--text-3); display: flex; flex-direction: column; gap: 6px; font-weight: 500; }
.app-grid input, .app-grid select {
  padding: 9px 12px; border: 1px solid var(--line); border-radius: 8px;
  font-size: 13.5px; background: var(--bg); outline: none; color: var(--text);
}
.app-grid input:focus, .app-grid select:focus { border-color: var(--brand); background: #fff; box-shadow: 0 0 0 3px rgba(30,64,175,.12); }
@media (max-width: 900px) { .app-grid { grid-template-columns: 1fr; } }

/* ═══ 设置 ═══ */
.pref-card {
  max-width: 500px; background: var(--card); border: 1px solid var(--line);
  border-radius: 10px; padding: 22px 26px; box-shadow: var(--shadow);
}
.pref-card h2 { margin: 0 0 4px; font-size: 16px; }
.pref-card > p { margin: 0; }
.pref-card label { font-size: 12.5px; color: var(--text-3); display: block; margin: 16px 0; font-weight: 500; }
.pref-card select, .pref-card input {
  width: 100%; margin-top: 6px; padding: 9px 12px;
  border: 1px solid var(--line); border-radius: 8px; font-size: 13.5px; background: var(--bg); outline: none; color: var(--text);
}
.pref-card select:focus, .pref-card input:focus { border-color: var(--brand); background: #fff; }
.pref-card button { margin-top: 18px; }

/* 客服管理卡片网格 */
.card-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(320px, 1fr)); gap: 18px; }
.card-grid .card { grid-column: span 1; margin-bottom: 0; }
.card-grid .card[style*="span 2"] { grid-column: span 2; }
.card-top {
  display: flex; align-items: center; justify-content: space-between; margin-bottom: 8px;
  gap: 10px;
}
.stat-row { display: flex; justify-content: space-between; padding: 8px 0; border-bottom: 1px solid var(--line); font-size: 13px; }
.stat-row:last-child { border-bottom: none; }
.stat-row strong { color: var(--brand-dark); }
.agent-item { display: flex; align-items: center; justify-content: space-between; padding: 10px 12px; background: var(--bg); border: 1px solid var(--line); border-radius: 8px; margin-bottom: 8px; font-size: 13px; }
.agent-item button { padding: 4px 10px; font-size: 12px; }

/* ═══ 知识库子菜单 ═══ */
.sub-nav { display: flex; gap: 6px; margin-bottom: 18px; border-bottom: 1px solid var(--line); padding-bottom: 0; }
.sub-nav-btn {
  padding: 10px 20px; font-size: 14px; font-weight: 500; color: var(--text-3);
  background: none; border: none; border-bottom: 2px solid transparent; margin-bottom: -1px;
  cursor: pointer; transition: all .15s;
}
.sub-nav-btn:hover { color: var(--text); background: var(--bg); }
.sub-nav-btn.active {
  color: var(--brand-dark); font-weight: 600;
  border-bottom: 2px solid var(--brand);
  background: linear-gradient(180deg, transparent 60%, var(--brand-soft));
}
.sub-panel { display: none; }
.sub-panel.active { display: block; }
.script-item { padding: 12px 0; border-bottom: 1px solid var(--line); font-size: 13px; }
.script-item:last-child { border-bottom: none; }
.script-item .script-q { font-weight: 600; color: var(--brand-dark); margin-bottom: 4px; }
.script-item .script-a { color: var(--text-2); line-height: 1.6; }
.script-item .script-meta { font-size: 11px; color: var(--muted); margin-top: 6px; }

/* 内嵌表单（view-pref / view-appconfig 内的 label + input） */
#view-pref label, #view-account label { font-size: 12.5px; color: var(--text-3); display: flex; flex-direction: column; gap: 6px; font-weight: 500; }
#view-pref input, #view-pref select,
#view-account input, #view-account select {
  padding: 9px 12px; border: 1px solid var(--line); border-radius: 8px;
  font-size: 13.5px; background: var(--bg); outline: none; color: var(--text);
}
#view-pref input:focus, #view-pref select:focus,
#view-account input:focus, #view-account select:focus {
  border-color: var(--brand); background: #fff; box-shadow: 0 0 0 3px rgba(30,64,175,.12);
}

/* ═══ 弹窗 / 按钮 / toast ═══ */
dialog {
  border: none; border-radius: 16px; padding: 0; width: 440px; max-width: 92vw;
  background: var(--card); color: var(--text);
  box-shadow: 0 20px 60px rgba(15,23,42,.18);
}
dialog::backdrop { background: rgba(15,23,42,.30); backdrop-filter: blur(3px); }
.dlg-head { padding: 22px 26px 0; }
.dlg-head h2 { margin: 0 0 5px; font-size: 16px; font-weight: 700; }
.dlg-head p { margin: 0; font-size: 12.5px; color: var(--text-3); line-height: 1.5; }
dialog form { padding: 18px 26px 24px; display: flex; flex-direction: column; gap: 14px; }
dialog label { font-size: 12.5px; color: var(--text-3); display: flex; flex-direction: column; gap: 6px; font-weight: 500; }
dialog select, dialog textarea, dialog input {
  padding: 9px 12px; border: 1px solid var(--line); border-radius: 8px;
  font-size: 13.5px; background: var(--bg); outline: none; color: var(--text); font-family: inherit;
}
dialog select:focus, dialog textarea:focus, dialog input:focus { border-color: var(--brand); background: #fff; }
.dlg-actions { display: flex; justify-content: flex-end; gap: 10px; margin-top: 4px; }
button {
  background: linear-gradient(135deg, var(--brand), var(--brand-2)); color: #fff;
  border: none; border-radius: 9px;
  font-size: 13px; font-weight: 600; padding: 10px 18px; cursor: pointer;
  transition: all .15s; box-shadow: 0 2px 10px rgba(30,64,175,.25);
}
button:hover { transform: translateY(-1px); box-shadow: 0 4px 16px rgba(30,64,175,.35); }
button:disabled { opacity: .45; cursor: not-allowed; transform: none; box-shadow: none; }
button.ghost {
  background: #fff; border: 1px solid var(--line); color: var(--text-3);
  font-size: 12.5px; padding: 8px 14px; box-shadow: none;
}
button.ghost:hover { color: var(--brand); border-color: var(--brand); background: var(--brand-soft); transform: none; box-shadow: none; }
.toast {
  position: fixed; bottom: 24px; left: 50%; transform: translateX(-50%);
  background: linear-gradient(135deg, #0a1f44, #1e40af); color: #fff;
  font-size: 13px; padding: 12px 20px;
  border-radius: 10px; z-index: 99; max-width: 80vw;
  box-shadow: 0 8px 28px rgba(30,64,175,.4);
  border: 1px solid rgba(30,64,175,.4);
}
.toast.err { background: linear-gradient(135deg, var(--err), #b91c1c); border-color: var(--err); }

/* ═══ Spinner ═══ */
.spinner {
  width: 24px; height: 24px; border: 3px solid var(--line);
  border-top-color: var(--brand); border-radius: 50%; animation: spin 1s linear infinite;
  flex-shrink: 0;
}
.spinner.small { width: 16px; height: 16px; border-width: 2px; }
@keyframes spin { to { transform: rotate(360deg); } }

/* ═══ 窄屏 ═══ */
@media (max-width: 760px) {
  .chat-col { flex-direction: column; height: auto; }
  .chat-side { width: 100%; flex-direction: row; flex-wrap: wrap; }
  .bubble { max-width: 90%; }
  #top-nav a { padding: 6px 10px; font-size: 12.5px; }
  #top-nav a.active::after { display: none; }
  .topbar-tenant { display: none; }
}