:root{
  --bg:#f6f6f4; --panel:#ffffff; --ink:#141414; --muted:#6b6b6b;
  --line:#e6e6e2; --yellow:#fde900; --yellow-d:#e7d400; --ok:#2f8f4e; --warn:#c0392b;
  --radius:14px; --shadow:0 1px 3px rgba(0,0,0,.06),0 8px 24px rgba(0,0,0,.05);
}
*{box-sizing:border-box}
body{margin:0;font-family:-apple-system,"Segoe UI",Roboto,"Noto Sans SC",sans-serif;
  background:var(--bg);color:var(--ink);font-size:14px;line-height:1.55}
a{color:inherit}
button{font-family:inherit;cursor:pointer}
.btn{border:0;border-radius:10px;padding:9px 16px;font-weight:600;background:var(--ink);color:#fff}
.btn:hover{opacity:.9}
.btn.primary{background:var(--yellow);color:#141414}
.btn.primary:hover{background:var(--yellow-d)}
.btn.ghost{background:#fff;border:1px solid var(--line);color:var(--ink)}
.btn.sm{padding:5px 10px;font-size:12px;border-radius:8px}
.btn.danger{background:#fff;border:1px solid #f0c9c4;color:var(--warn)}

/* top bar */
.topbar{display:flex;align-items:center;gap:16px;background:#141414;color:#fff;
  padding:0 22px;height:60px;position:sticky;top:0;z-index:20}
.topbar img.logo{height:24px;background:#fff;padding:5px 10px;border-radius:8px}
.topbar .badge{font-size:11px;letter-spacing:.12em;text-transform:uppercase;
  color:#141414;background:var(--yellow);padding:3px 8px;border-radius:6px;font-weight:700;
  display:inline-block;text-indent:.12em}  /* text-indent 抵消尾部字距，CJK 才居中 */
.topbar .spacer{flex:1}
.topbar a.logout{color:#bbb;text-decoration:none;font-size:13px}
.topbar a.logout:hover{color:#fff}

/* tabs */
.tabs{display:flex;gap:4px;padding:14px 22px 0;background:var(--bg)}
.tab{padding:9px 18px;border-radius:10px 10px 0 0;font-weight:600;color:var(--muted);
  cursor:pointer;border:1px solid transparent;border-bottom:0}
.tab.active{background:var(--panel);color:var(--ink);box-shadow:0 -2px 0 var(--yellow) inset}

.wrap{max-width:1440px;margin:0 auto;padding:18px 28px 48px}
@media (min-width:1700px){ .wrap{max-width:1680px} body{font-size:15px} }
.panel{background:var(--panel);border:1px solid var(--line);border-radius:var(--radius);
  box-shadow:var(--shadow);padding:18px}
.row{display:flex;gap:16px}
.muted{color:var(--muted)}
h2{margin:0 0 4px;font-size:18px}
h3{margin:0 0 10px;font-size:15px}
.cards{display:grid;grid-template-columns:repeat(auto-fit,minmax(180px,1fr));gap:12px;margin:6px 0 18px}
.card{background:var(--panel);border:1px solid var(--line);border-radius:12px;padding:16px}
.card .n{font-size:30px;font-weight:800}
.card .l{color:var(--muted);font-size:12px;text-transform:uppercase;letter-spacing:.08em}
.pill{font-size:11px;padding:2px 8px;border-radius:20px;background:#eee;color:#444}
.pill.ok{background:#e7f5ec;color:var(--ok)}
.pill.empty{background:#f3f3f3;color:#999}
.pill.human{background:var(--yellow);color:#141414}
.pill.ai{background:#eef;color:#345}
.pill.system{background:#141414;color:var(--yellow)}

/* knowledge base */
table{width:100%;border-collapse:collapse}
th,td{text-align:left;padding:9px 10px;border-bottom:1px solid var(--line);vertical-align:top}
th{font-size:12px;color:var(--muted);text-transform:uppercase;letter-spacing:.06em}
td .u{color:var(--muted);font-size:12px;word-break:break-all}
.docview textarea{width:100%;min-height:340px;font-family:ui-monospace,Menlo,monospace;
  font-size:13px;border:1px solid var(--line);border-radius:10px;padding:12px;line-height:1.5}
input.title{width:100%;font-size:16px;font-weight:600;border:1px solid var(--line);
  border-radius:10px;padding:10px 12px;margin-bottom:10px}

/* crawl log */
.log{font-family:ui-monospace,Menlo,monospace;font-size:12px;background:#0e0e0e;color:#cfcfcf;
  border-radius:10px;padding:12px;height:230px;overflow:auto;white-space:pre-wrap}
.log .g{color:#7fd18b}.log .r{color:#ff8d7a}.log .y{color:var(--yellow)}

/* conversations */
.chatgrid{display:grid;grid-template-columns:340px minmax(0,1fr);gap:16px;height:calc(100vh - 232px);min-height:560px}
.convlist{border:1px solid var(--line);border-radius:12px;overflow:auto;height:100%;background:#fff}
.convitem{padding:12px 14px;border-bottom:1px solid var(--line);cursor:pointer}
.convitem:hover{background:#fafafa}
.convitem.active{background:#fffbe0}
.convitem.alert{background:#fff3f1;box-shadow:inset 3px 0 0 #e0392b}
.convitem.alert.active{background:#ffe9e5}
.convitem .t{font-weight:600;display:flex;justify-content:space-between;align-items:center;gap:6px}
.badge-unread{background:#e0392b;color:#fff;border-radius:10px;min-width:18px;height:18px;
  display:inline-flex;align-items:center;justify-content:center;font-size:11px;padding:0 5px}
.pill.alert{background:#e0392b;color:#fff}
@keyframes pulse{0%,100%{opacity:1}50%{opacity:.45}}
.pill.alert{animation:pulse 1.1s ease-in-out infinite}
.convitem .p{color:var(--muted);font-size:12px;margin-top:3px;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.conversation{border:1px solid var(--line);border-radius:12px;display:flex;flex-direction:column;background:#fff;height:100%;min-height:0}
.conversation.dragover{outline:2px dashed var(--yellow);outline-offset:-4px}
.odot{display:inline-block;width:8px;height:8px;border-radius:50%;background:#c4c4c4;margin-right:5px;vertical-align:middle}
.odot.on{background:#56d175;box-shadow:0 0 0 3px rgba(86,209,117,.18)}
.conv-head{padding:12px 16px;border-bottom:1px solid var(--line);display:flex;align-items:center;gap:10px}
.conv-head .spacer{flex:1}
.msgs{flex:1;overflow:auto;padding:16px;display:flex;flex-direction:column;gap:10px;min-height:0}
.bubble{max-width:74%;padding:9px 13px;border-radius:14px;white-space:pre-wrap;word-wrap:break-word}
/* 后台视角：客户(user)在左、浅色；我方回复(AI/人工 assistant)在右、深色 */
.bubble.user{align-self:flex-start;background:#f1f1ee;color:#141414;border-bottom-left-radius:4px}
.bubble.assistant{align-self:flex-end;background:#141414;color:#fff;border-bottom-right-radius:4px}
.bubble .who{font-size:10px;opacity:.6;margin-bottom:2px;text-transform:uppercase;letter-spacing:.05em}
.bubble a{color:#0a5bd3;text-decoration:underline}
.bubble.assistant a{color:#9fd0ff}
.msg-img{max-width:220px;border-radius:10px;display:block;margin-top:4px;cursor:zoom-in}
.md-h{font-weight:700;margin:6px 0 2px}
.md-ul{margin:4px 0;padding-left:18px}
.md-ul li{margin:1px 0}
.composer{display:flex;gap:8px;padding:12px;border-top:1px solid var(--line)}
.composer input{flex:1;border:1px solid var(--line);border-radius:10px;padding:10px 12px;font-size:14px}
.empty-hint{color:var(--muted);text-align:center;padding:60px 20px}
.needs-col{width:288px;flex:0 0 288px;border-left:1px solid var(--line);padding:16px;overflow:auto;background:#fcfcfb}
.needs-title{font-weight:700;font-size:13px;margin-bottom:10px}
.needs-title span{font-weight:400;color:var(--muted);font-size:11px}
.needs-email{font-size:13px;background:#fffbe0;border:1px solid #f0e6a6;border-radius:8px;padding:7px 10px;margin-bottom:10px;word-break:break-all}
.needs-email.empty{background:#f5f5f3;border-color:var(--line);color:var(--muted)}
.needs-body{font-size:13px;line-height:1.6}
.needs-body .md-ul{padding-left:16px}

/* login */
.login-wrap{min-height:100vh;display:flex;align-items:center;justify-content:center;background:var(--bg)}
.login-box{background:#fff;border:1px solid var(--line);border-radius:18px;box-shadow:var(--shadow);
  padding:38px 34px;width:360px;text-align:center}
.login-box img{height:34px;margin-bottom:22px}
.login-box input{width:100%;border:1px solid var(--line);border-radius:10px;padding:11px 13px;margin-bottom:12px;font-size:14px}
.login-box .err{color:var(--warn);font-size:13px;margin-bottom:10px;min-height:18px}
.login-box .btn{width:100%;padding:12px}