:root {
  --bg: #f4f6f9;
  --panel: #ffffff;
  --ink: #1d2733;
  --muted: #66788f;
  --line: #e3e9f1;
  --brand: #1f6feb;
  --brand-soft: #e8f1fe;
  --ok: #1a7f4b;
  --warn: #b26a00;
  --err: #c62828;
  --radius: 10px;
}
* { box-sizing: border-box; }
body {
  margin: 0; background: var(--bg); color: var(--ink);
  font-family: -apple-system, BlinkMacSystemFont, "PingFang SC", "Microsoft YaHei", "Segoe UI", sans-serif;
  font-size: 14px; line-height: 1.6;
}
.hidden { display: none !important; }
.topbar {
  display: flex; align-items: center; gap: 16px; padding: 10px 20px;
  background: var(--panel); border-bottom: 1px solid var(--line);
  position: sticky; top: 0; z-index: 20;
}
.brand { font-weight: 700; font-size: 16px; }
.nav { display: flex; gap: 4px; }
.nav a {
  padding: 6px 12px; border-radius: 8px; text-decoration: none; color: var(--muted);
}
.nav a.active { background: var(--brand-soft); color: var(--brand); font-weight: 600; }
.spacer { flex: 1; }
.whoami { color: var(--muted); }
main { max-width: 1080px; margin: 0 auto; padding: 20px 16px 60px; }
.btn {
  border: 1px solid var(--line); background: var(--panel); color: var(--ink);
  padding: 7px 14px; border-radius: 8px; cursor: pointer; font-size: 14px;
}
.btn:hover { border-color: var(--brand); color: var(--brand); }
.btn.primary { background: var(--brand); border-color: var(--brand); color: #fff; }
.btn.primary:hover { filter: brightness(1.08); color: #fff; }
.btn.ghost { border-color: transparent; color: var(--muted); }
.btn.danger { color: var(--err); border-color: var(--err); }
.btn:disabled { opacity: .5; cursor: not-allowed; }
.card {
  background: var(--panel); border: 1px solid var(--line); border-radius: var(--radius);
  padding: 18px; margin-bottom: 14px;
}
.card h3 { margin: 0 0 10px; font-size: 15px; }
.muted { color: var(--muted); }
.small { font-size: 12px; }
input[type=text], input[type=password], select, textarea {
  width: 100%; padding: 8px 10px; border: 1px solid var(--line); border-radius: 8px;
  font-size: 14px; font-family: inherit; background: #fff; color: var(--ink);
}
textarea { resize: vertical; min-height: 72px; }
label.field { display: block; margin-bottom: 12px; }
label.field > span { display: block; margin-bottom: 4px; color: var(--muted); font-size: 13px; }
.row { display: flex; gap: 10px; align-items: center; flex-wrap: wrap; }
.grid2 { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; }
@media (max-width: 720px) { .grid2 { grid-template-columns: 1fr; } }
.tag {
  display: inline-block; padding: 1px 8px; border-radius: 20px; font-size: 12px;
  background: var(--brand-soft); color: var(--brand);
}
.tag.warn { background: #fff3e0; color: var(--warn); }
.tag.ok { background: #e6f4ea; color: var(--ok); }
.tag.err { background: #fdecea; color: var(--err); }
.tag.gray { background: #eef1f5; color: var(--muted); }
/* 登录 */
.login-wrap { max-width: 380px; margin: 8vh auto; }
/* 会话布局 */
.chat-layout { display: grid; grid-template-columns: 260px 1fr; gap: 14px; }
@media (max-width: 860px) { .chat-layout { grid-template-columns: 1fr; } }
.session-list { max-height: 70vh; overflow-y: auto; }
.session-item {
  padding: 10px 12px; border-radius: 8px; cursor: pointer; border: 1px solid transparent;
  margin-bottom: 6px; background: var(--panel);
}
.session-item:hover { border-color: var(--line); }
.session-item.active { border-color: var(--brand); background: var(--brand-soft); }
.session-item .title { font-weight: 600; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.badge {
  background: var(--err); color: #fff; border-radius: 10px; font-size: 11px;
  padding: 0 6px; margin-left: 6px;
}
.binding-banner {
  display: flex; gap: 10px; align-items: center; flex-wrap: wrap;
  padding: 8px 14px; background: var(--brand-soft); border-radius: 8px; margin-bottom: 10px;
  font-size: 13px;
}
.messages { min-height: 300px; max-height: 56vh; overflow-y: auto; padding: 6px 2px; }
.msg { margin-bottom: 12px; display: flex; }
.msg.user { justify-content: flex-end; }
.msg .bubble {
  max-width: 78%; padding: 10px 14px; border-radius: 12px; white-space: pre-wrap;
  word-break: break-word;
}
.msg.user .bubble { background: var(--brand); color: #fff; border-bottom-right-radius: 4px; }
.msg.assistant .bubble, .msg.expert .bubble {
  background: var(--panel); border: 1px solid var(--line); border-bottom-left-radius: 4px;
}
.msg.expert .bubble { border-left: 3px solid var(--ok); }
.msg .meta { font-size: 11px; color: var(--muted); margin-top: 3px; }
.msg .imgs { display: flex; gap: 6px; flex-wrap: wrap; margin-top: 6px; }
.msg .imgs img { width: 72px; height: 72px; object-fit: cover; border-radius: 6px; cursor: pointer; }
.status-line { color: var(--muted); font-size: 13px; padding: 4px 8px; }
.status-line .dot { display: inline-block; width: 8px; height: 8px; border-radius: 50%;
  background: var(--brand); margin-right: 6px; animation: pulse 1.2s infinite; }
@keyframes pulse { 50% { opacity: .3; } }
.composer { border-top: 1px solid var(--line); padding-top: 10px; margin-top: 8px; }
.composer .previews { display: flex; gap: 8px; flex-wrap: wrap; margin-bottom: 8px; }
.composer .previews .thumb { position: relative; }
.composer .previews img { width: 64px; height: 64px; object-fit: cover; border-radius: 6px;
  border: 1px solid var(--line); }
.composer .previews .rm {
  position: absolute; top: -6px; right: -6px; width: 18px; height: 18px; border-radius: 50%;
  background: var(--err); color: #fff; border: none; cursor: pointer; font-size: 11px; line-height: 1;
}
.question-card { border: 1px solid var(--brand); background: var(--brand-soft); }
.question-card .q { margin-bottom: 10px; }
.question-card .opts { display: flex; gap: 6px; flex-wrap: wrap; margin: 6px 0; }
.question-card .opt {
  padding: 4px 12px; border-radius: 16px; border: 1px solid var(--brand);
  background: #fff; cursor: pointer; font-size: 13px;
}
.question-card .opt.selected { background: var(--brand); color: #fff; }
.ticket-item { display: flex; gap: 10px; align-items: flex-start; padding: 12px;
  border: 1px solid var(--line); border-radius: 8px; margin-bottom: 8px; background: var(--panel);
  cursor: pointer; }
.ticket-item:hover { border-color: var(--brand); }
.toast {
  position: fixed; bottom: 24px; left: 50%; transform: translateX(-50%);
  background: var(--ink); color: #fff; padding: 10px 18px; border-radius: 8px; z-index: 99;
  max-width: 80vw;
}
.toast.err { background: var(--err); }
.modal-mask { position: fixed; inset: 0; background: rgba(10,20,30,.45); z-index: 50;
  display: flex; align-items: center; justify-content: center; padding: 20px; }
.modal { background: #fff; border-radius: 12px; max-width: 640px; width: 100%;
  max-height: 86vh; overflow-y: auto; padding: 20px; }
.modal img.full { max-width: 100%; border-radius: 8px; }
.wizard-steps { display: flex; gap: 8px; margin-bottom: 14px; }
.wizard-steps .step { flex: 1; text-align: center; padding: 6px; border-radius: 8px;
  background: #eef1f5; color: var(--muted); font-size: 13px; }
.wizard-steps .step.on { background: var(--brand-soft); color: var(--brand); font-weight: 600; }
.choice-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(220px, 1fr)); gap: 10px; }
.choice {
  border: 1px solid var(--line); border-radius: 10px; padding: 14px; cursor: pointer;
  background: var(--panel);
}
.choice:hover { border-color: var(--brand); }
.choice.selected { border-color: var(--brand); background: var(--brand-soft); }
.choice .name { font-weight: 600; margin-bottom: 4px; }
.empty { text-align: center; color: var(--muted); padding: 40px 0; }/* 阶段性进度面板 */
.activity-current { display: flex; align-items: center; gap: 8px; }
.activity-detail { font-weight: 600; color: var(--brand); }
.activity-history { display: flex; flex-wrap: wrap; gap: 6px; margin-top: 6px; }
.activity-done {
  font-size: 11px; color: var(--ok); background: #e6f4ea;
  padding: 1px 8px; border-radius: 10px;
}
/* 流式答复光标 */
.bubble.streaming::after {
  content: "▍"; color: var(--brand); animation: pulse 0.8s infinite; margin-left: 1px;
}
.bubble.streaming { cursor: pointer; }
/* 动作行（聊天流中的进度消息） */
.action-rows { display: flex; flex-direction: column; gap: 4px; margin: 10px 0; }
.action-row {
  display: flex; align-items: center; gap: 8px;
  padding: 6px 12px; border-radius: 8px; font-size: 13px;
  background: #f7f9fc; border: 1px solid var(--line); color: var(--muted);
  max-width: 420px;
}
.action-row .action-icon { width: 20px; text-align: center; font-size: 13px; }
.action-row .action-label { color: var(--ink); }
.action-row .action-calls { font-size: 11px; color: var(--brand); background: var(--brand-soft);
  padding: 0 6px; border-radius: 8px; }
.action-row .action-spacer { flex: 1; }
.action-row .action-dur { font-variant-numeric: tabular-nums; font-size: 12px; color: var(--muted);
  min-width: 32px; text-align: right; }
.action-row.running { border-color: var(--brand); background: var(--brand-soft); }
.action-row.running .action-icon { animation: pulse 1.2s infinite; }
.action-row.running .action-dur { color: var(--brand); font-weight: 600; }
.action-row.done .action-icon { color: var(--ok); }
.action-rows.static .action-row { background: transparent; border-color: transparent; padding: 3px 12px; }