/* 客服台 · 前端样式
   登录 / 工作台 / 访客页公用，主题色由页面用 --brand 覆盖 */
:root{
  --brand:#0B5CFF; --brand-d:#0847c4; --brand-l:#eaf1ff;
  --bg:#f4f6fa; --fg:#0f172a; --muted:#6b7a90; --line:#e6eaf1;
  --card:#ffffff; --ok:#12b76a; --warn:#f79009; --danger:#f04438;
  --r:14px; --shadow:0 8px 30px rgba(15,23,42,.08);
}
*{box-sizing:border-box;-webkit-tap-highlight-color:transparent}
html,body{margin:0;padding:0}
body{font-family:-apple-system,BlinkMacSystemFont,"PingFang SC","Hiragino Sans GB","Microsoft YaHei",sans-serif;
  background:var(--bg);color:var(--fg);font-size:14px;line-height:1.6;-webkit-font-smoothing:antialiased}
a{color:var(--brand);text-decoration:none}
img{max-width:100%}
button,input,textarea,select{font-family:inherit;font-size:14px;color:inherit}
.btn{display:inline-flex;align-items:center;justify-content:center;gap:6px;height:38px;padding:0 16px;border-radius:10px;
  border:1px solid var(--line);background:#fff;cursor:pointer;transition:.15s;white-space:nowrap;font-weight:600}
.btn:hover{border-color:#cfd8e6}
.btn.primary{background:var(--brand);border-color:var(--brand);color:#fff}
.btn.primary:hover{background:var(--brand-d);border-color:var(--brand-d)}
.btn.ghost{background:transparent;border-color:transparent;color:var(--muted);font-weight:500}
.btn.ghost:hover{background:#eef1f6;color:var(--fg)}
.btn.sm{height:32px;padding:0 12px;font-size:13px;border-radius:8px}
.btn.danger{color:var(--danger);border-color:#ffd7d3}
.btn[disabled]{opacity:.55;cursor:not-allowed}
.input{width:100%;height:44px;border:1px solid var(--line);border-radius:11px;padding:0 14px;background:#fff;outline:none;transition:.15s}
.input:focus{border-color:var(--brand);box-shadow:0 0 0 3px var(--brand-l)}
textarea.input{height:auto;padding:11px 14px;resize:vertical}
.muted{color:var(--muted)}
.small{font-size:12px}
.hidden{display:none !important}
.toast{position:fixed;left:50%;bottom:40px;transform:translate(-50%,20px);background:rgba(17,24,39,.92);color:#fff;
  padding:10px 18px;border-radius:10px;font-size:13px;opacity:0;pointer-events:none;transition:.25s;z-index:9999;max-width:80vw}
.toast.show{opacity:1;transform:translate(-50%,0)}

/* ---------------- 登录页 ---------------- */
.login-wrap{min-height:100vh;display:flex;align-items:center;justify-content:center;padding:22px;
  background:radial-gradient(1200px 600px at 10% -10%,#dbe6ff 0%,transparent 55%),
             radial-gradient(900px 500px at 110% 10%,#ffe6ef 0%,transparent 50%),#f4f6fa}
.login-card{width:100%;max-width:400px;background:var(--card);border-radius:20px;box-shadow:var(--shadow);padding:26px 24px 22px}
.login-card .brand{display:flex;align-items:center;gap:11px;margin-bottom:18px}
.login-card .brand img{width:44px;height:44px;border-radius:12px;object-fit:cover}
.login-card .brand b{font-size:18px;display:block;line-height:1.2}
.login-card .brand span{color:var(--muted);font-size:12px}
.tabs{display:flex;background:#f1f4f9;border-radius:11px;padding:4px;margin-bottom:18px}
.tabs button{flex:1;height:36px;border:0;background:transparent;border-radius:8px;color:var(--muted);font-weight:600;cursor:pointer}
.tabs button.on{background:#fff;color:var(--fg);box-shadow:0 2px 8px rgba(15,23,42,.08)}
.field{margin-bottom:13px}
.field label{display:block;font-size:12.5px;color:var(--muted);margin-bottom:6px}
.cap-row{display:flex;gap:9px}
.cap-row .input{flex:1}
.cap-box{min-width:118px;height:44px;border:1px solid var(--line);border-radius:11px;background:#f8fafc;display:flex;
  align-items:center;justify-content:center;gap:8px;font-weight:700;letter-spacing:.5px;cursor:pointer}
.login-card .btn.primary{width:100%;height:46px;border-radius:12px;font-size:15px}
.alert{padding:9px 12px;border-radius:10px;font-size:13px;margin-bottom:12px}
.alert.err{background:#fff2f0;color:#c9372c;border:1px solid #ffd9d4}
.alert.ok{background:#eafaf1;color:#087443;border:1px solid #ccf0de}
.foot-note{text-align:center;color:var(--muted);font-size:12px;margin-top:16px}

/* ---------------- 工作台 ---------------- */
.topbar{height:58px;background:#fff;border-bottom:1px solid var(--line);display:flex;align-items:center;
  justify-content:space-between;padding:0 16px;position:sticky;top:0;z-index:50}
.topbar .logo{font-weight:800;font-size:16px;letter-spacing:.5px}
.topbar .tb-left,.topbar .tb-right{display:flex;align-items:center;gap:10px}
.badge{display:inline-block;padding:2px 8px;border-radius:999px;font-size:12px;background:var(--brand-l);color:var(--brand);font-weight:600}
.badge.warn{background:#fff6e8;color:#b54708}
.badge.gray{background:#f1f4f9;color:var(--muted)}

.layout{display:flex;height:calc(100vh - 58px);overflow:hidden}
.side{width:330px;min-width:330px;background:#fff;border-right:1px solid var(--line);display:flex;flex-direction:column}
.side-head{padding:12px;border-bottom:1px solid var(--line)}
.side-head .input{height:38px;border-radius:10px;background:#f7f9fc}
.filters{display:flex;gap:6px;margin-top:10px}
.filters .f{border:0;background:#f1f4f9;color:var(--muted);height:28px;padding:0 12px;border-radius:999px;font-size:12.5px;cursor:pointer;font-weight:600}
.filters .f.on{background:var(--brand);color:#fff}
.list{flex:1;overflow-y:auto}
.item{display:flex;gap:10px;padding:12px;border-bottom:1px solid #f2f5f9;cursor:pointer;position:relative}
.item:hover{background:#fafcff}
.item.on{background:var(--brand-l)}
.item .av{width:42px;height:42px;border-radius:50%;object-fit:cover;background:#eef2f8;flex:0 0 42px}
.item .mid{flex:1;min-width:0}
.item .r1{display:flex;justify-content:space-between;gap:8px;align-items:center}
.item .nm{font-weight:700;font-size:13.5px;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.item .tm{color:var(--muted);font-size:11.5px;flex:0 0 auto}
.item .r2{color:var(--muted);font-size:12.5px;overflow:hidden;text-overflow:ellipsis;white-space:nowrap;margin-top:2px}
.item .r3{display:flex;gap:6px;align-items:center;margin-top:4px;flex-wrap:wrap}
.dot{width:7px;height:7px;border-radius:50%;background:#cbd5e1;display:inline-block}
.dot.on{background:var(--ok);box-shadow:0 0 0 3px rgba(18,183,106,.15)}
.unread{position:absolute;right:12px;bottom:12px;min-width:19px;height:19px;border-radius:999px;background:var(--danger);
  color:#fff;font-size:11.5px;display:flex;align-items:center;justify-content:center;padding:0 5px;font-weight:700}
.side-foot{padding:8px 12px;border-top:1px solid var(--line);color:var(--muted);font-size:12px}

.chat{flex:1;display:flex;flex-direction:column;background:var(--bg);min-width:0}
.chat-head{background:#fff;border-bottom:1px solid var(--line);padding:10px 14px;display:flex;align-items:center;gap:10px}
.chat-head .av{width:38px;height:38px;border-radius:50%;object-fit:cover}
.chat-head .tt{flex:1;min-width:0}
.chat-head .tt b{font-size:14.5px;display:block}
.chat-head .tt span{color:var(--muted);font-size:12px;display:block;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.chat-body{flex:1;overflow-y:auto;padding:18px 16px;display:flex;flex-direction:column;gap:12px}
.empty{flex:1;display:flex;align-items:center;justify-content:center;color:#9aa8bd;flex-direction:column;gap:10px}
.empty .big{font-size:40px;opacity:.5}
.msg{display:flex;gap:9px;max-width:78%}
.msg.right{align-self:flex-end;flex-direction:row-reverse}
.msg .b{background:#fff;border-radius:12px;padding:10px 13px;box-shadow:0 1px 2px rgba(15,23,42,.06);word-break:break-word;white-space:pre-wrap}
.msg.right .b{background:var(--brand);color:#fff}
.msg .meta{font-size:11.5px;color:#9aa8bd;align-self:flex-end;margin:0 4px}
.msg img.pic{max-width:230px;border-radius:10px;display:block}
.msg .card{border:1px solid var(--line);border-radius:11px;overflow:hidden;background:#fff;min-width:200px}
.msg .card .ch{padding:9px 12px;background:#f7f9fc;font-weight:700;font-size:13px;border-bottom:1px solid var(--line)}
.msg .card .cb{padding:10px 12px;font-size:13px}
.msg .card .amt{color:var(--danger);font-weight:800;font-size:17px}
.msg .card .cf{padding:8px 12px;border-top:1px solid var(--line);color:var(--brand);font-size:12.5px;font-weight:600}
.msg .recall{color:#9aa8bd;font-size:12px;cursor:pointer;opacity:0;transition:.15s}
.msg:hover .recall{opacity:1}
.sysline{align-self:center;color:#93a1b5;font-size:12px;background:#eef2f8;padding:3px 10px;border-radius:999px}
.composer{background:#fff;border-top:1px solid var(--line);padding:10px 12px}
.tools{display:flex;gap:8px;flex-wrap:wrap;margin-bottom:8px}
.tool{border:1px solid var(--line);background:#fff;border-radius:9px;height:32px;padding:0 11px;font-size:12.5px;cursor:pointer;display:inline-flex;align-items:center;gap:5px;font-weight:600;color:#42506a}
.tool:hover{border-color:var(--brand);color:var(--brand)}
.edit{display:flex;gap:9px;align-items:flex-end}
.edit textarea{flex:1;min-height:44px;max-height:130px;border:1px solid var(--line);border-radius:11px;padding:11px 13px;outline:none;resize:none}
.edit textarea:focus{border-color:var(--brand);box-shadow:0 0 0 3px var(--brand-l)}

/* ---------------- 弹层 / 表单 ---------------- */
.mask{position:fixed;inset:0;background:rgba(15,23,42,.45);display:flex;align-items:center;justify-content:center;z-index:9000;padding:18px}
.modal{width:100%;max-width:420px;background:#fff;border-radius:16px;padding:18px;max-height:86vh;overflow:auto}
.modal h3{margin:0 0 14px;font-size:16px}
.modal .row{margin-bottom:12px}
.modal .row label{display:block;font-size:12.5px;color:var(--muted);margin-bottom:5px}
.modal .acts{display:flex;gap:9px;justify-content:flex-end;margin-top:16px}
.modal .acts .btn{min-width:84px}
.chips{display:flex;gap:8px;flex-wrap:wrap}
.chip{border:1px solid var(--line);border-radius:999px;padding:5px 12px;font-size:12.5px;cursor:pointer;font-weight:600;color:#42506a}
.chip.on{border-color:var(--brand);background:var(--brand-l);color:var(--brand)}

/* ---------------- 访客客服页 ---------------- */
.kf{max-width:520px;margin:0 auto;min-height:100vh;display:flex;flex-direction:column;background:#eef1f6}
.kf-head{background:linear-gradient(135deg,var(--brand),var(--brand-d));color:#fff;padding:14px 16px;
  display:flex;align-items:center;gap:11px;position:sticky;top:0;z-index:20}
.kf-head .av{width:42px;height:42px;border-radius:50%;background:#fff;object-fit:cover}
.kf-head .tt b{display:block;font-size:15px}
.kf-head .tt span{font-size:12px;opacity:.9;display:block}
.kf-head .st{margin-left:auto;font-size:11.5px;background:rgba(255,255,255,.2);padding:4px 10px;border-radius:999px}
.kf-notice{background:#fff8e6;color:#8a5b00;font-size:12.5px;padding:8px 14px;border-bottom:1px solid #ffe8b8}
.kf-body{flex:1;padding:16px 14px 12px;display:flex;flex-direction:column;gap:12px;overflow-y:auto}
.kf-body .msg{max-width:82%}
.kf-body .msg .b{background:#fff}
.kf-body .msg.right .b{background:var(--brand);color:#fff}
.kf-foot{background:#fff;border-top:1px solid var(--line);padding:9px 10px;position:sticky;bottom:0}
.kf-foot .tools{margin-bottom:7px}
.kf-credit{text-align:center;color:#9aa8bd;font-size:11.5px;padding:8px 0 14px}
.collect{border:1px solid var(--line);border-radius:12px;background:#fff;overflow:hidden;min-width:230px}
.collect .ch{padding:10px 12px;font-weight:700;border-bottom:1px solid var(--line);background:#f7f9fc;font-size:13px}
.collect .cb{padding:10px 12px}
.collect .fld{margin-bottom:8px}
.collect .fld label{display:block;font-size:12px;color:var(--muted);margin-bottom:4px}
.collect .fld input{width:100%;height:36px;border:1px solid var(--line);border-radius:8px;padding:0 10px}
.blocked{max-width:420px;margin:22vh auto;text-align:center;color:var(--muted);padding:20px}

/* ---------------- 后台 ---------------- */
.admin-top{height:58px;background:#0f172a;color:#fff;display:flex;align-items:center;justify-content:space-between;padding:0 16px}
.admin-top .logo{font-weight:800;letter-spacing:.5px}
.admin-top a{color:#c7d2fe}
.wrap{max-width:1180px;margin:0 auto;padding:18px 14px 60px}
.tabbar{display:flex;gap:6px;flex-wrap:wrap;margin-bottom:16px}
.tabbar button{height:36px;border-radius:10px;border:1px solid var(--line);background:#fff;padding:0 14px;cursor:pointer;font-weight:600;color:#42506a}
.tabbar button.on{background:var(--brand);border-color:var(--brand);color:#fff}
.panel{background:#fff;border-radius:var(--r);box-shadow:var(--shadow);padding:16px;margin-bottom:16px}
.panel h3{margin:0 0 14px;font-size:15px}
.stats{display:grid;grid-template-columns:repeat(auto-fit,minmax(140px,1fr));gap:12px}
.stat{background:#fff;border-radius:var(--r);padding:14px;box-shadow:var(--shadow)}
.stat b{display:block;font-size:22px}
.stat span{color:var(--muted);font-size:12.5px}
table.tb{width:100%;border-collapse:collapse;font-size:13px}
table.tb th,table.tb td{padding:9px 8px;border-bottom:1px solid var(--line);text-align:left;vertical-align:middle}
table.tb th{color:var(--muted);font-weight:600;font-size:12px;white-space:nowrap}
table.tb tr:hover td{background:#fafcff}
.row-flex{display:flex;gap:10px;flex-wrap:wrap;align-items:flex-end}
.row-flex .fld{flex:1;min-width:130px}
.row-flex .fld label{display:block;font-size:12.5px;color:var(--muted);margin-bottom:5px}
.grid2{display:grid;grid-template-columns:repeat(auto-fit,minmax(220px,1fr));gap:12px}
.mono{font-family:ui-monospace,Menlo,Consolas,monospace;font-size:12.5px}
.pillrow{display:flex;gap:8px;flex-wrap:wrap;margin-bottom:12px}

@media (max-width:760px){
  .side{width:100%;min-width:0;border-right:0}
  .layout{position:relative}
  .chat{position:absolute;inset:0;z-index:30;transform:translateX(100%);transition:.22s;display:none}
  body.mchat .chat{transform:translateX(0);display:flex}
  .topbar .expire{display:none}
  .chat-head .back{display:inline-flex}
}
.chat-head .back{display:none;border:0;background:#f1f4f9;width:32px;height:32px;border-radius:9px;cursor:pointer;align-items:center;justify-content:center}