:root {
  color-scheme: light;
  --bg: #f4f6f8;
  --panel: #ffffff;
  --text: #1d2733;
  --muted: #687586;
  --line: #d8dee7;
  --line-strong: #b9c3cf;
  --primary: #1769aa;
  --primary-dark: #0d4f83;
  --primary-soft: #dbeafe;
  --danger: #b42318;
  --danger-soft: #fee2e2;
  --warn: #b45309;
  --warn-soft: #fef3c7;
  --ok: #057a55;
  --ok-soft: #d1fae5;
  --bubble-ai: #f1f5f9;
  --bubble-user: var(--primary-soft);
  --bubble-system: #fff7df;

  --chat-max-w: 960px;
  --bubble-max-w: 720px;
  --bubble-radius: 14px;
  --composer-h: 64px;
  --topbar-h: 56px;
  --zone-gap: 12px;
  --field-gap: 12px;
  --tap-min: 36px;
  --safe-bottom: env(safe-area-inset-bottom, 0px);
}

* { box-sizing: border-box; }

html, body { margin: 0; padding: 0; }

body {
  background: var(--bg);
  color: var(--text);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Microsoft YaHei", sans-serif;
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
}

button, input, select, textarea { font: inherit; color: inherit; }
input, select, textarea {
  border: 1px solid var(--line);
  border-radius: 8px;
  background: #fff;
  min-height: var(--tap-min);
  padding: 8px 10px;
  width: 100%;
}
input:focus, select:focus, textarea:focus {
  outline: 2px solid var(--primary);
  outline-offset: 1px;
  border-color: var(--primary);
}
input:disabled, select:disabled { background: #eef2f6; color: #536171; }
textarea { resize: vertical; }

/* ============ 通用按钮 ============ */
.btn {
  border: 0;
  border-radius: 8px;
  background: var(--primary);
  color: #fff;
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: var(--tap-min);
  padding: 0 14px;
  text-decoration: none;
  white-space: nowrap;
  font-weight: 500;
  transition: background-color .15s ease;
}
.btn:hover { background: var(--primary-dark); }
.btn:disabled { background: #9aa7b5; cursor: not-allowed; }

.btn--primary { background: var(--primary); color: #fff; }
.btn--primary:hover { background: var(--primary-dark); }

.btn--ghost {
  background: transparent;
  color: var(--text);
  border: 1px solid var(--line);
}
.btn--ghost:hover { background: #eef2f6; color: var(--text); }

.btn--danger { background: var(--danger); }
.btn--danger:hover { background: #8d1c13; }

/* ============ 登录页(保留兼容) ============ */
.login-body { min-height: 100dvh; display: grid; place-items: center; padding: 16px; }
.login-shell { width: min(420px, calc(100vw - 32px)); }
.login-panel {
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: 12px;
  padding: 28px;
}
.login-panel h1 { margin: 0 0 16px; font-size: 22px; }
.login-form { display: grid; gap: 14px; }
.login-form label { display: grid; gap: 6px; color: var(--muted); font-size: 13px; }
.login-form .btn,
.login-form button {
  background: var(--primary);
  color: #fff;
  border: 0;
  border-radius: 8px;
  min-height: 44px;
}
.alert {
  border: 1px solid var(--warn-soft);
  background: var(--warn-soft);
  color: var(--warn);
  border-radius: 8px;
  padding: 10px 12px;
}
.status-text { color: var(--muted); font-size: 13px; }

/* ============ 聊天工作台:整体骨架 ============ */
.chat-shell {
  display: flex;
  flex-direction: column;
  min-height: 100dvh;
  background: var(--bg);
}

.chat-topbar {
  position: sticky;
  top: 0;
  z-index: 10;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  height: var(--topbar-h);
  padding: 0 16px;
  background: var(--panel);
  border-bottom: 1px solid var(--line);
}
.chat-topbar__title { display: flex; flex-direction: column; line-height: 1.2; min-width: 0; }
.chat-topbar__brand { font-weight: 600; font-size: 15px; }
.chat-topbar__sub { color: var(--muted); font-size: 12px; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.chat-topbar__actions { display: flex; gap: 8px; align-items: center; }
.chat-topbar__actions .btn { min-height: 34px; padding: 0 10px; font-size: 13px; }

.chat-stream {
  flex: 1;
  overflow-y: auto;
  -webkit-overflow-scrolling: touch;
  padding: 16px;
  width: 100%;
  max-width: var(--chat-max-w);
  margin: 0 auto;
  scroll-behavior: smooth;
}

/* ============ 消息气泡 ============ */
.msg {
  display: flex;
  gap: 8px;
  margin: 12px 0;
  animation: fadeIn .18s ease-out;
}
@keyframes fadeIn { from { opacity: 0; transform: translateY(4px);} to { opacity: 1; transform: none; } }
.msg--user { flex-direction: row-reverse; }
.msg__avatar {
  flex: 0 0 32px;
  width: 32px;
  height: 32px;
  border-radius: 50%;
  background: #cbd5e1;
  color: #fff;
  font-size: 12px;
  display: grid;
  place-items: center;
}
.msg--user .msg__avatar { background: var(--primary); }
.msg--ai .msg__avatar { background: #0d4f83; }
.msg--system .msg__avatar { display: none; }

.bubble {
  max-width: var(--bubble-max-w);
  padding: 10px 14px;
  border-radius: var(--bubble-radius);
  background: var(--bubble-ai);
  border: 1px solid var(--line);
  font-size: 14px;
  word-wrap: break-word;
}
.msg--ai .bubble { background: var(--bubble-ai); border-top-left-radius: 4px; }
.msg--user .bubble { background: var(--bubble-user); border-top-right-radius: 4px; border-color: #b6d4f5; }
.msg--system .bubble {
  background: var(--bubble-system);
  border-color: #f0d58c;
  color: #604500;
  margin: 0 auto;
  text-align: center;
  font-size: 13px;
}

.bubble__head { font-weight: 500; margin-bottom: 8px; }
.bubble__head .warn { color: var(--warn); }
.bubble__foot { margin-top: 8px; display: flex; gap: 8px; flex-wrap: wrap; }
.bubble__image-meta { color: var(--muted); font-size: 12px; }
.bubble--error { background: var(--danger-soft); border-color: #fca5a5; color: #7f1d1d; }
.bubble--submit-result.success { background: var(--ok-soft); border-color: #86efac; color: #064e3b; }

/* ============ 分区卡片 ============ */
.bubble__zones {
  display: grid;
  gap: var(--zone-gap);
  margin-top: 4px;
}
.zone-card {
  background: #fff;
  border: 1px solid var(--line);
  border-radius: 10px;
  overflow: hidden;
}
.zone-card__head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 8px;
  padding: 10px 12px;
  background: #f8fafc;
  border-bottom: 1px solid var(--line);
  cursor: pointer;
  user-select: none;
}
.zone-card__head h3 { margin: 0; font-size: 14px; font-weight: 600; }
.zone-card__meta { color: var(--muted); font-size: 12px; }
.zone-card__toggle {
  background: transparent;
  border: 0;
  width: 24px;
  height: 24px;
  border-radius: 4px;
  color: var(--muted);
  cursor: pointer;
}
.zone-card__toggle:hover { background: #eef2f6; }
.zone-card__body {
  padding: 12px;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: var(--field-gap);
}
.zone-card[data-collapsed="true"] .zone-card__body { display: none; }
.zone-card[data-collapsed="true"] .zone-card__toggle { transform: rotate(-90deg); }

/* ============ 字段单元 ============ */
.field-cell {
  display: flex;
  flex-direction: column;
  gap: 4px;
  padding: 8px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: #fff;
  position: relative;
  transition: border-color .15s, background-color .15s;
}
.field-cell__label {
  display: flex;
  align-items: center;
  gap: 4px;
  font-size: 12px;
  color: var(--muted);
}
.field-cell__label--confirmed { color: var(--ok); }
.field-cell__label .req { color: var(--danger); font-weight: 600; }
.field-cell__label .ok { color: var(--ok); font-weight: 700; }
.field-confirm {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  width: fit-content;
  color: var(--muted);
  font-size: 12px;
  cursor: pointer;
}
.field-confirm--section {
  margin-bottom: 4px;
}
.field-confirm__checkbox {
  width: 16px;
  min-width: 16px;
  height: 16px;
  min-height: 16px;
  margin: 0;
  padding: 0;
  accent-color: var(--primary);
}
.field-badge {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 18px;
  padding: 0 6px;
  border-radius: 999px;
  font-size: 10px;
  font-weight: 700;
  letter-spacing: .02em;
}
.field-badge--ai {
  background: #e0f2fe;
  color: #075985;
}
.field-badge--inferred {
  background: #fef3c7;
  color: #92400e;
}
.field-badge--memory {
  background: #dcfce7;
  color: #166534;
}
.field-cell__src {
  font-size: 11px;
  color: var(--muted);
  margin-top: 2px;
}
.alignment-detail {
  margin-top: 6px;
  padding: 8px 9px;
  border-radius: 8px;
  border: 1px dashed var(--line-strong);
  background: #f8fafc;
  display: grid;
  gap: 4px;
}
.alignment-detail--ai {
  background: #f0f9ff;
  border-color: #7dd3fc;
}
.alignment-detail--inferred {
  background: #fffaf0;
  border-color: #f6ad55;
}
.alignment-detail--memory {
  background: #f0fdf4;
  border-color: #86efac;
}
.alignment-detail__head {
  font-size: 11px;
  font-weight: 700;
  color: var(--text);
}
.alignment-detail__row {
  display: flex;
  gap: 8px;
  font-size: 11px;
  color: var(--muted);
}
.alignment-detail__row span {
  flex: 0 0 30px;
}
.alignment-detail__row b {
  color: var(--text);
  font-weight: 600;
  word-break: break-all;
}
.alignment-detail__reason {
  font-size: 11px;
  color: var(--muted);
}
.field-cell input,
.field-cell select {
  font-size: 14px;
  min-height: var(--tap-min);
}
.field-cell--low-conf {
  border-left: 3px solid var(--warn);
  background: #fffbeb;
}
.field-cell--missing {
  border-color: var(--danger);
  background: #fff5f5;
}
.field-cell--missing input,
.field-cell--missing select { border-color: var(--danger); }
.field-cell--ok { border-left: 3px solid var(--ok); }
.field-cell--shake { animation: shake .35s ease-in-out; }
@keyframes shake {
  0%,100% { transform: translateX(0); }
  20% { transform: translateX(-6px); }
  40% { transform: translateX(6px); }
  60% { transform: translateX(-4px); }
  80% { transform: translateX(4px); }
}

/* 设备清单 */
.device-list { list-style: none; margin: 0; padding: 0; display: grid; gap: 10px; }
.device-item {
  display: grid;
  grid-template-columns: 80px 1fr 1fr 1fr auto;
  gap: 8px;
  align-items: end;
  padding: 10px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: #fff;
}
.device-item__detail {
  grid-column: 1 / -1;
}
.device-item__remove {
  background: transparent;
  border: 1px solid var(--line);
  color: var(--danger);
  border-radius: 6px;
  height: var(--tap-min);
  padding: 0 10px;
  cursor: pointer;
}
.device-item__remove:hover { background: var(--danger-soft); }
.device-add {
  margin-top: 10px;
  width: 100%;
  background: transparent;
  border: 1px dashed var(--line-strong);
  color: var(--muted);
  border-radius: 8px;
  min-height: var(--tap-min);
  cursor: pointer;
}
.device-add:hover { background: #eef2f6; color: var(--text); }

/* ============ 提交栏 ============ */
.chat-submitbar {
  position: sticky;
  bottom: calc(var(--composer-h) + var(--safe-bottom));
  z-index: 6;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  padding: 10px 16px;
  background: rgba(255,255,255,0.96);
  backdrop-filter: blur(8px);
  border-top: 1px solid var(--line);
  width: 100%;
  max-width: var(--chat-max-w);
  margin: 0 auto;
}
.submitbar__summary { color: var(--muted); font-size: 13px; min-width: 0; }
.submitbar__actions { display: flex; gap: 8px; }
.submitbar__actions .btn { min-height: 36px; padding: 0 14px; font-size: 13px; }

/* ============ 输入条 ============ */
.chat-composer {
  position: sticky;
  bottom: 0;
  z-index: 5;
  background: var(--panel);
  border-top: 1px solid var(--line);
  padding: 8px 12px calc(8px + var(--safe-bottom));
}
.composer__row {
  display: flex;
  align-items: flex-end;
  gap: 8px;
  max-width: var(--chat-max-w);
  margin: 0 auto;
}
.composer__upload {
  flex: 0 0 auto;
  width: 40px;
  height: 40px;
  border-radius: 50%;
  background: #eef2f6;
  color: var(--primary);
  display: grid;
  place-items: center;
  cursor: pointer;
  border: 1px solid var(--line);
}
.composer__upload:hover { background: #dbe5f1; }
.composer__textarea {
  flex: 1 1 auto;
  resize: none;
  max-height: 120px;
  min-height: 40px;
  border-radius: 20px;
  padding: 10px 14px;
  line-height: 1.4;
}
.composer__send {
  flex: 0 0 auto;
  border-radius: 20px;
  min-width: 64px;
}
.composer__hint {
  color: var(--muted);
  font-size: 11px;
  text-align: center;
  margin-top: 4px;
}

/* 占位/空态 */
.empty-state { text-align: center; padding: 32px 16px; color: var(--muted); }
.empty-state h2 { margin: 0 0 4px; font-size: 16px; color: var(--text); }
.empty-state p { margin: 0; font-size: 13px; }

/* ============ 媒体查询:平板 ============ */
@media (max-width: 819px) {
  .chat-stream { padding: 12px; }
  .bubble { font-size: 14px; }
  .device-item { grid-template-columns: 70px 1fr 1fr; }
  .device-item__remove { grid-column: 3 / 4; justify-self: end; }
  .device-item label:nth-child(4) { grid-column: 1 / 4; }
}

/* ============ 媒体查询:手机 ============ */
@media (max-width: 479px) {
  :root {
    --topbar-h: 48px;
    --composer-h: 56px;
    --zone-gap: 8px;
    --field-gap: 10px;
    --tap-min: 44px;
    --bubble-radius: 12px;
  }
  .chat-topbar { padding: 0 12px; }
  .chat-topbar__brand { font-size: 14px; }
  .chat-topbar__sub { font-size: 11px; }
  .chat-topbar__actions .btn { min-height: 32px; padding: 0 8px; font-size: 12px; }

  .chat-stream { padding: 10px; }
  .bubble { max-width: 90vw; padding: 10px 12px; }
  .msg__avatar { width: 26px; height: 26px; flex-basis: 26px; font-size: 11px; }

  .zone-card__body { grid-template-columns: 1fr; }
  .field-cell__label { font-size: 13px; }
  .field-cell input, .field-cell select { min-height: var(--tap-min); font-size: 16px; }

  .device-item {
    grid-template-columns: 1fr;
    gap: 6px;
  }
  .device-item__remove { justify-self: stretch; }

  .composer__textarea { font-size: 16px; }
  .submitbar__summary { font-size: 12px; }
}

/* ============ 媒体查询:极小屏兜底 ============ */
@media (max-width: 359px) {
  .chat-stream { padding: 8px; }
  .bubble { padding: 8px 10px; font-size: 13px; }
  .composer__upload { width: 36px; height: 36px; }
  .composer__send { min-width: 56px; }
}