:root {
  --main: #2dd4bf;
  --deep: #0d9488;
  --dark: #0f766e;
  --ink: #1f2937;
  --ink2: #374151;
  --body: #4b5563;
  --muted: #6b7280;
  --line: #e5e7eb;
  --line2: #d1d5db;
  --bg: #f6f8fa;
  --card: #ffffff;
  --warn: #f59e0b;
  --risk: #ef4444;
  --ok: #10b981;
  --radius: 8px;
}
* { box-sizing: border-box; }
html, body { height: 100%; }
body {
  margin: 0;
  font-family: "Noto Sans SC", "Microsoft YaHei", -apple-system, "PingFang SC", system-ui, sans-serif;
  font-size: 14px;
  line-height: 1.6;
  color: var(--body);
  background: var(--bg);
  -webkit-font-smoothing: antialiased;
}
a { color: var(--deep); text-decoration: none; }
h1, h2, h3, h4 { color: var(--ink); margin: 0; font-weight: 600; }
button, input, select, textarea { font-family: inherit; font-size: inherit; }

/* ---------- 登录页 ---------- */
.login-wrap {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  background: linear-gradient(135deg, #0f766e 0%, #134e4a 55%, #1f2937 100%);
  padding: 24px;
}
.login-card {
  width: 100%;
  max-width: 400px;
  background: #fff;
  border-radius: 12px;
  padding: 36px 32px 30px;
  box-shadow: 0 18px 50px rgba(0, 0, 0, 0.28);
}
.login-card .brand {
  display: flex; align-items: center; gap: 10px; margin-bottom: 6px;
}
.login-card .brand .dot {
  width: 30px; height: 30px; border-radius: 8px;
  background: linear-gradient(135deg, var(--main), var(--dark));
}
.login-card h1 { font-size: 19px; }
.login-card .sub { color: var(--muted); font-size: 13px; margin-bottom: 24px; }
.field { margin-bottom: 16px; }
.field label { display: block; font-size: 13px; color: var(--ink2); margin-bottom: 6px; font-weight: 500; }
.field input {
  width: 100%; padding: 10px 12px; border: 1px solid var(--line2);
  border-radius: 6px; outline: none; transition: border-color .15s, box-shadow .15s;
}
.field input:focus { border-color: var(--main); box-shadow: 0 0 0 3px rgba(45, 212, 191, .16); }
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 6px;
  padding: 9px 16px; border-radius: 6px; border: 1px solid transparent;
  background: var(--deep); color: #fff; cursor: pointer; font-weight: 500;
  transition: background .15s, opacity .15s;
  white-space: nowrap;
}
.btn:hover { background: var(--dark); }
.btn:disabled { opacity: .55; cursor: not-allowed; }
.btn.block { width: 100%; padding: 11px; font-size: 15px; }
.btn.ghost { background: #fff; color: var(--ink2); border-color: var(--line2); }
.btn.ghost:hover { background: var(--bg); }
.btn.danger { background: var(--risk); }
.btn.danger:hover { background: #dc2626; }
.btn.sm { padding: 5px 10px; font-size: 12.5px; }
.alert { padding: 9px 12px; border-radius: 6px; font-size: 13px; margin-bottom: 14px; display: none; }
.alert.show { display: block; }
.alert.err { background: #fef2f2; color: #991b1b; border-left: 3px solid var(--risk); }
.alert.okk { background: #ecfdf5; color: #065f46; border-left: 3px solid var(--ok); }

/* ---------- 主框架 ---------- */
.layout { display: flex; min-height: 100vh; }
.side {
  width: 208px; flex: none; background: #0f172a; color: #cbd5e1;
  display: flex; flex-direction: column; padding: 18px 0;
}
.side .logo {
  display: flex; align-items: center; gap: 9px; padding: 0 18px 18px;
  border-bottom: 1px solid rgba(255,255,255,.08); margin-bottom: 12px;
}
.side .logo .dot {
  width: 26px; height: 26px; border-radius: 7px; flex: none;
  background: linear-gradient(135deg, var(--main), var(--dark));
}
.side .logo b { color: #fff; font-size: 14px; line-height: 1.25; }
.side .logo small { display: block; color: #64748b; font-size: 11px; font-weight: 400; }
.side nav { flex: 1; }
.side nav a {
  display: flex; align-items: center; gap: 9px; padding: 9px 18px;
  color: #cbd5e1; font-size: 13.5px; border-left: 3px solid transparent;
}
.side nav a:hover { background: rgba(255,255,255,.05); color: #fff; }
.side nav a.active {
  background: rgba(45,212,191,.12); color: var(--main);
  border-left-color: var(--main); font-weight: 500;
}
.side .who {
  padding: 12px 18px 0; border-top: 1px solid rgba(255,255,255,.08);
  font-size: 12px; color: #64748b;
}
.side .who b { color: #cbd5e1; display: block; font-size: 13px; }
.side .who .role {
  display: inline-block; margin-top: 4px; padding: 1px 7px; border-radius: 10px;
  background: rgba(45,212,191,.16); color: var(--main); font-size: 11px;
}
.side .who button {
  margin-top: 10px; background: none; border: 1px solid rgba(255,255,255,.16);
  color: #94a3b8; padding: 4px 10px; border-radius: 5px; cursor: pointer; font-size: 12px;
}
.side .who button:hover { color: #fff; border-color: rgba(255,255,255,.4); }

.main { flex: 1; min-width: 0; display: flex; flex-direction: column; }
.topbar {
  height: 56px; flex: none; background: #fff; border-bottom: 1px solid var(--line);
  display: flex; align-items: center; padding: 0 22px; gap: 12px;
}
.topbar h2 { font-size: 16px; }
.topbar .spacer { flex: 1; }
.content { padding: 22px; overflow: auto; }

/* ---------- 卡片 / 表格 ---------- */
.card {
  background: var(--card); border: 1px solid var(--line); border-radius: var(--radius);
  margin-bottom: 18px; overflow: hidden;
}
.card-h {
  display: flex; align-items: center; gap: 10px;
  padding: 13px 16px; border-bottom: 1px solid var(--line);
}
.card-h h3 { font-size: 14.5px; }
.card-h .spacer { flex: 1; }
.card-b { padding: 16px; }
.kpis { display: grid; grid-template-columns: repeat(auto-fit, minmax(150px, 1fr)); gap: 12px; margin-bottom: 18px; }
.kpi {
  background: #fff; border: 1px solid var(--line); border-radius: var(--radius);
  padding: 14px 16px;
}
.kpi .n { font-size: 24px; font-weight: 700; color: var(--ink); line-height: 1.2; }
.kpi .l { font-size: 12.5px; color: var(--muted); margin-top: 2px; }
.kpi.warn .n { color: var(--warn); }

table { width: 100%; border-collapse: collapse; }
th {
  text-align: left; font-size: 12.5px; font-weight: 600; color: var(--ink2);
  background: #f9fafb; padding: 9px 12px; border-bottom: 1px solid var(--line);
}
td { padding: 10px 12px; border-bottom: 1px solid #f1f3f5; font-size: 13px; vertical-align: middle; }
tr:last-child td { border-bottom: none; }
tbody tr:hover td { background: #fafbfc; }
.mono { font-family: ui-monospace, "Cascadia Mono", Consolas, monospace; font-size: 12px; }
.muted { color: var(--muted); }
.empty { padding: 36px; text-align: center; color: var(--muted); font-size: 13px; }

.tag {
  display: inline-block; padding: 1px 8px; border-radius: 10px; font-size: 11.5px;
  background: #f1f5f9; color: #475569;
}
.tag.green { background: #ecfdf5; color: #047857; }
.tag.amber { background: #fffbeb; color: #b45309; }
.tag.red { background: #fef2f2; color: #b91c1c; }
.tag.blue { background: #eff6ff; color: #1d4ed8; }

/* ---------- 弹窗 ---------- */
.modal-mask {
  position: fixed; inset: 0; background: rgba(15,23,42,.5);
  display: none; align-items: center; justify-content: center; padding: 24px; z-index: 50;
}
.modal-mask.show { display: flex; }
.modal {
  background: #fff; border-radius: 10px; width: 100%; max-width: 520px;
  max-height: 88vh; display: flex; flex-direction: column; box-shadow: 0 20px 60px rgba(0,0,0,.3);
}
.modal-h { padding: 15px 18px; border-bottom: 1px solid var(--line); display: flex; align-items: center; }
.modal-h h3 { font-size: 15px; flex: 1; }
.modal-h .x { background: none; border: none; font-size: 20px; cursor: pointer; color: var(--muted); line-height: 1; }
.modal-b { padding: 18px; overflow: auto; }
.modal-f { padding: 13px 18px; border-top: 1px solid var(--line); display: flex; justify-content: flex-end; gap: 10px; }
.form-row { margin-bottom: 14px; }
.form-row label { display: block; font-size: 13px; color: var(--ink2); margin-bottom: 5px; font-weight: 500; }
.form-row .hint { font-size: 12px; color: var(--muted); margin-top: 4px; }
.form-row input, .form-row select, .form-row textarea {
  width: 100%; padding: 8px 11px; border: 1px solid var(--line2); border-radius: 6px; outline: none;
}
.form-row input:focus, .form-row select:focus, .form-row textarea:focus {
  border-color: var(--main); box-shadow: 0 0 0 3px rgba(45,212,191,.16);
}

/* ---------- 聊天 ---------- */
.chat-layout { display: flex; height: 100vh; }
.chat-side {
  width: 260px; flex: none; background: #0f172a; display: flex; flex-direction: column; color: #cbd5e1;
}
.chat-side .hd { padding: 16px 16px 12px; border-bottom: 1px solid rgba(255,255,255,.08); }
.chat-side .hd b { color: #fff; font-size: 14px; display: block; }
.chat-side .hd small { color: #64748b; font-size: 11.5px; }
.chat-side .new {
  margin: 12px 14px; padding: 8px; border: 1px dashed rgba(45,212,191,.5);
  background: rgba(45,212,191,.08); color: var(--main); border-radius: 6px;
  cursor: pointer; font-size: 13px; text-align: center;
}
.chat-side .new:hover { background: rgba(45,212,191,.16); }
.chat-side .list { flex: 1; overflow: auto; padding: 0 8px 12px; }
.chat-side .item {
  padding: 9px 10px; border-radius: 6px; cursor: pointer; font-size: 13px;
  white-space: nowrap; overflow: hidden; text-overflow: ellipsis; color: #cbd5e1;
}
.chat-side .item:hover { background: rgba(255,255,255,.06); }
.chat-side .item.active { background: rgba(45,212,191,.14); color: var(--main); }
.chat-main { flex: 1; display: flex; flex-direction: column; background: #fff; min-width: 0; }
.chat-head {
  height: 54px; flex: none; border-bottom: 1px solid var(--line);
  display: flex; align-items: center; padding: 0 20px; gap: 10px;
}
.chat-head b { color: var(--ink); font-size: 14.5px; }
.chat-body { flex: 1; overflow: auto; padding: 22px 0; background: #fafbfc; }
.msg { max-width: 720px; margin: 0 auto 16px; padding: 0 20px; display: flex; gap: 10px; }
.msg .av {
  width: 30px; height: 30px; border-radius: 7px; flex: none;
  display: flex; align-items: center; justify-content: center;
  font-size: 12px; font-weight: 600; color: #fff;
}
.msg.user { flex-direction: row-reverse; }
.msg.user .av { background: var(--deep); }
.msg.bot .av { background: #334155; }
.msg .bubble {
  background: #fff; border: 1px solid var(--line); border-radius: 8px;
  padding: 10px 14px; font-size: 14px; color: var(--ink2); white-space: pre-wrap; word-break: break-word;
  max-width: 78%;
}
.msg.user .bubble { background: var(--deep); color: #fff; border-color: var(--deep); }
.msg .bubble.loading { color: var(--muted); }
.chat-input { flex: none; border-top: 1px solid var(--line); padding: 14px 20px 18px; background: #fff; }
.chat-input .box {
  max-width: 760px; margin: 0 auto; display: flex; gap: 10px; align-items: flex-end;
}
.chat-input textarea {
  flex: 1; resize: none; min-height: 44px; max-height: 140px; padding: 11px 14px;
  border: 1px solid var(--line2); border-radius: 8px; outline: none; line-height: 1.5;
}
.chat-input textarea:focus { border-color: var(--main); box-shadow: 0 0 0 3px rgba(45,212,191,.14); }
.chat-empty { text-align: center; color: var(--muted); padding: 80px 20px; }
.chat-empty h3 { font-size: 16px; color: var(--ink2); margin-bottom: 6px; }
.quick { display: flex; flex-wrap: wrap; gap: 8px; justify-content: center; margin-top: 16px; }
.quick span {
  padding: 6px 12px; border: 1px solid var(--line2); border-radius: 16px;
  font-size: 13px; cursor: pointer; background: #fff;
}
.quick span:hover { border-color: var(--main); color: var(--deep); }

@media (max-width: 860px) {
  .side { width: 62px; }
  .side .logo b, .side nav a span, .side .who { display: none; }
  .side nav a { justify-content: center; padding: 11px 0; }
  .chat-side { width: 0; display: none; }
}