:root{
  --brand:#4f7cff;
  --brand2:#7b5cff;
  --ink:#1b2233;
  --muted:#8b94a8;
  --line:#e9edf6;
  --bg:#f3f6fd;
  --card:#fff;
  --ok:#22c55e;
  --warn:#f59e0b;
  --busy:#ef4444;
  --off:#9aa3b5;
}
*{margin:0;padding:0;box-sizing:border-box}
html,body{height:100%}
body{
  font-family:-apple-system,BlinkMacSystemFont,'Segoe UI','PingFang SC','Microsoft YaHei',sans-serif;
  background:var(--bg);color:var(--ink);-webkit-font-smoothing:antialiased;font-size:14px
}
button{font-family:inherit}

/* 登录 */
.login-mask{position:fixed;inset:0;z-index:200;display:flex;align-items:center;justify-content:center;
  background:linear-gradient(135deg,#eef3ff,#f7f0ff)}
.login-mask.hidden{display:none}
.login-card{width:360px;background:#fff;border-radius:22px;padding:38px 32px;box-shadow:0 26px 70px rgba(31,45,90,.16);text-align:center}
.login-logo{width:56px;height:56px;margin:0 auto 16px;border-radius:18px;color:#fff;font-weight:700;font-size:14px;
  display:flex;align-items:center;justify-content:center;background:linear-gradient(135deg,var(--brand),var(--brand2));box-shadow:0 12px 28px rgba(79,124,255,.38)}
.login-card h2{font-size:20px;margin-bottom:6px}
.login-tip{color:var(--muted);font-size:13px;margin-bottom:22px}
.login-card input{width:100%;padding:13px 15px;border:1px solid var(--line);border-radius:12px;font-size:14px;outline:0;transition:.2s}
.login-card input:focus{border-color:var(--brand);box-shadow:0 0 0 4px rgba(79,124,255,.12)}
.login-card button{width:100%;margin-top:16px;padding:13px;border:0;border-radius:12px;color:#fff;font-size:15px;font-weight:600;cursor:pointer;
  background:linear-gradient(135deg,var(--brand),var(--brand2));box-shadow:0 12px 26px rgba(79,124,255,.32);transition:.2s}
.login-card button:hover{transform:translateY(-1px)}
.login-err{color:#ef4444;font-size:12.5px;margin-top:12px;min-height:16px}
.login-tip a{color:var(--brand);text-decoration:none}
.login-tip a:hover{text-decoration:underline}
code{background:#f1f4fb;padding:2px 6px;border-radius:6px;font-size:12px;color:#4a5568}

/* 布局 */
.app{display:flex;height:100vh;overflow:hidden}
.app[hidden]{display:none}
.side{width:212px;flex:0 0 212px;background:#fff;border-right:1px solid var(--line);display:flex;flex-direction:column}
.side-brand{height:62px;display:flex;align-items:center;gap:10px;padding:0 20px;font-weight:700;font-size:16px;border-bottom:1px solid var(--line);white-space:nowrap;overflow:hidden}
.side-brand>span:first-child{width:11px;height:11px;flex:0 0 11px;border-radius:50%;background:linear-gradient(135deg,var(--brand),var(--brand2));box-shadow:0 0 0 4px rgba(79,124,255,.14)}
#sideBrandName{overflow:hidden;text-overflow:ellipsis}
.side-nav{flex:1;padding:14px 12px;display:flex;flex-direction:column;gap:6px}
.nav-item{border:0;background:transparent;text-align:left;padding:12px 16px;border-radius:12px;font-size:14px;color:#5b6479;cursor:pointer;transition:.2s}
.nav-item:hover{background:#f3f6fd;color:var(--brand)}
.nav-item.active{color:#fff;font-weight:600;background:linear-gradient(135deg,var(--brand),var(--brand2));box-shadow:0 10px 22px rgba(79,124,255,.3)}
.side-foot{padding:14px;border-top:1px solid var(--line)}
.status-label{font-size:12px;color:var(--muted);display:block;margin-bottom:8px}
.status-btns{display:flex;flex-wrap:wrap;gap:6px;margin-bottom:14px}
.status-btns button{border:1px solid var(--line);background:#f8fafd;color:#5b6479;font-size:12px;padding:6px 10px;border-radius:9px;cursor:pointer;transition:.2s}
.status-btns button:hover{border-color:var(--brand);color:var(--brand)}
.status-btns button.active{background:linear-gradient(135deg,var(--brand),var(--brand2));color:#fff;border-color:transparent;box-shadow:0 6px 14px rgba(79,124,255,.3)}
.logout{width:100%;border:1px solid var(--line);background:#fff;border-radius:10px;padding:9px;font-size:13px;color:#5b6479;cursor:pointer;transition:.2s}
.logout:hover{border-color:#ef4444;color:#ef4444}

.main{flex:1;overflow:hidden;position:relative}
.panel{display:none;height:100%}
.panel.active{display:flex}

/* 会话中心 */
#panel-chat{display:none}
.avatar-placeholder{display:inline-flex;align-items:center;justify-content:center;width:42px;height:42px;border-radius:12px;background:linear-gradient(135deg,#4f7cff,#7b5cff);color:#fff;font-weight:700;font-size:16px}
#panel-chat.active{display:flex}
.sess-list{width:290px;flex:0 0 290px;background:#fff;border-right:1px solid var(--line);display:flex;flex-direction:column}
.sess-head{height:62px;display:flex;align-items:center;justify-content:space-between;padding:0 18px;border-bottom:1px solid var(--line);font-weight:600;font-size:14px}
.mini{border:1px solid var(--line);background:#fff;border-radius:9px;padding:5px 12px;font-size:12.5px;color:#5b6479;cursor:pointer;transition:.2s}
.mini:hover{border-color:var(--brand);color:var(--brand)}
.mini.danger:hover{border-color:#ef4444;color:#ef4444}
.sess-items{flex:1;overflow-y:auto}
.sess-items::-webkit-scrollbar{width:6px}
.sess-items::-webkit-scrollbar-thumb{background:#dde3f0;border-radius:3px}
.sess-item{padding:14px 18px;border-bottom:1px solid #f3f5fa;cursor:pointer;transition:.18s;position:relative}
.sess-item:hover{background:#f8faff}
.sess-item.active{background:#eef3ff}
.sess-item.active::before{content:'';position:absolute;left:0;top:0;bottom:0;width:3px;background:linear-gradient(180deg,var(--brand),var(--brand2))}
.sess-name{font-weight:600;font-size:13.5px;display:flex;align-items:center;gap:8px;margin-bottom:6px}
.sess-name .live{width:7px;height:7px;border-radius:50%;background:var(--ok);box-shadow:0 0 0 3px rgba(34,197,94,.18)}
.sess-name .dead{width:7px;height:7px;border-radius:50%;background:#cfd6e4}
.sess-sub{font-size:12px;color:var(--muted);display:flex;justify-content:space-between;gap:8px}
.unread{position:absolute;right:16px;top:14px;min-width:19px;height:19px;line-height:19px;text-align:center;border-radius:999px;
  background:#ef4444;color:#fff;font-size:11px;padding:0 5px;box-shadow:0 4px 10px rgba(239,68,68,.4)}
.unread.agent{background:#4f7cff;box-shadow:0 4px 10px rgba(79,124,255,.4);right:auto;left:16px;top:12px}

.chat-area{flex:1;display:flex;flex-direction:column;background:#f7f9fe;min-width:0}
.chat-top{height:62px;background:#fff;border-bottom:1px solid var(--line);display:flex;align-items:center;justify-content:space-between;padding:0 22px}
.c-name{font-weight:600;font-size:15px}
.c-sub{font-size:12px;color:var(--muted);margin-top:3px}
.chat-msgs{flex:1;overflow-y:auto;padding:22px;display:flex;flex-direction:column;gap:14px}
.chat-msgs::-webkit-scrollbar{width:6px}
.chat-msgs::-webkit-scrollbar-thumb{background:#dde3f0;border-radius:3px}
.m{display:flex;flex-direction:column;max-width:70%}
.m.you{align-self:flex-start}
.m.me{align-self:flex-end;align-items:flex-end}
.m .bb{padding:11px 15px;font-size:14px;line-height:1.7;border-radius:15px;word-break:break-word;white-space:pre-wrap}
.m.you .bb{background:#fff;border-top-left-radius:5px;box-shadow:0 3px 12px rgba(31,45,90,.06)}
.m.me .bb{color:#fff;background:linear-gradient(135deg,var(--brand),var(--brand2));border-top-right-radius:5px;box-shadow:0 6px 16px rgba(79,124,255,.24)}
.m .tt{font-size:11px;color:#a9b1c3;margin-top:5px;padding:0 4px}
.m .read-status{font-size:11px;color:#a9b1c3;margin-left:6px}
.m .read-status.read{color:#22c55e}
.typing-tip{display:flex;gap:4px;padding:9px 14px;background:#fff;border-radius:14px;align-self:flex-start;box-shadow:0 3px 12px rgba(31,45,90,.06)}
.typing-dot{width:6px;height:6px;border-radius:50%;background:#a9b1c3;animation:kf-admin-typing 1.2s infinite ease-in-out}
.typing-dot:nth-child(2){animation-delay:.2s}
.typing-dot:nth-child(3){animation-delay:.4s}
@keyframes kf-admin-typing{0%,60%,100%{transform:translateY(0);opacity:.5}30%{transform:translateY(-4px);opacity:1}}
.m img{max-width:200px;border-radius:12px;display:block;cursor:zoom-in}

.chat-input{background:#fff;border-top:1px solid var(--line);padding:10px 14px 14px;position:relative}
.chat-input .tools{display:flex;gap:6px;align-items:center;margin-bottom:6px}
.tool{border:1px solid var(--line);background:#f8fafd;border-radius:9px;padding:5px 12px;font-size:13px;cursor:pointer;transition:.2s}
.tool:hover{border-color:var(--brand);color:var(--brand)}
.chat-input textarea{width:100%;border:0;outline:0;resize:none;font-size:14px;line-height:1.6;font-family:inherit;max-height:110px;padding:6px 2px}
.send{float:right;border:0;color:#fff;font-size:14px;font-weight:600;padding:9px 26px;border-radius:999px;cursor:pointer;
  background:linear-gradient(135deg,var(--brand),var(--brand2));box-shadow:0 8px 18px rgba(79,124,255,.3);transition:.2s}
.send:hover{transform:translateY(-1px)}
.emoji-panel{display:grid;grid-template-columns:repeat(12,1fr);gap:3px;padding:10px;max-height:150px;overflow-y:auto;background:#fff;border:1px solid var(--line);border-radius:14px;margin-bottom:8px}
.emoji-panel button{border:0;background:transparent;font-size:19px;cursor:pointer;border-radius:8px;padding:4px;transition:.15s}
.emoji-panel button:hover{background:#eef2fd;transform:scale(1.15)}
.emoji-panel[hidden]{display:none}
.quick-panel{background:#fff;border:1px solid var(--line);border-radius:14px;padding:10px;margin-bottom:8px;max-height:180px;overflow-y:auto;display:flex;flex-direction:column;gap:6px}
.quick-panel[hidden]{display:none}
.quick-panel button{text-align:left;border:1px solid var(--line);background:#f8fafd;border-radius:10px;padding:9px 12px;font-size:13px;cursor:pointer;transition:.2s;color:#4a5568}
.quick-panel button:hover{border-color:var(--brand);color:var(--brand);background:#eef3ff}

/* 通用面板 */
#panel-stats.active,#panel-faq.active,#panel-setting.active,#panel-admin.active{display:block;overflow-y:auto;padding:26px 30px}
.stats-top{display:flex;align-items:center;justify-content:space-between;margin-bottom:20px;gap:16px;flex-wrap:wrap}
.stats-top h2{font-size:19px}
.range-btns{display:flex;gap:8px;background:#fff;border:1px solid var(--line);padding:5px;border-radius:12px}
.range-btns button{border:0;background:transparent;padding:8px 18px;border-radius:9px;font-size:13px;color:#5b6479;cursor:pointer;transition:.2s}
.range-btns button:hover{color:var(--brand)}
.range-btns button.active{color:#fff;font-weight:600;background:linear-gradient(135deg,var(--brand),var(--brand2));box-shadow:0 8px 18px rgba(79,124,255,.28)}

.cards{display:grid;grid-template-columns:repeat(auto-fit,minmax(200px,1fr));gap:16px;margin-bottom:22px}
.card{background:#fff;border-radius:18px;padding:20px;border:1px solid var(--line);position:relative;overflow:hidden}
.card::after{content:'';position:absolute;right:-24px;top:-24px;width:78px;height:78px;border-radius:50%;background:linear-gradient(135deg,rgba(79,124,255,.14),rgba(123,92,255,.14))}
.card .k{font-size:12.5px;color:var(--muted);margin-bottom:10px}
.card .v{font-size:27px;font-weight:800;letter-spacing:-.5px}
.card .v small{font-size:13px;font-weight:600;color:var(--muted);margin-left:4px}
.card .cmp{font-size:12px;margin-top:8px;color:var(--muted)}
.card .up{color:#16a34a}
.card .down{color:#dc2626}

.chart-box,.table-box{background:#fff;border-radius:18px;border:1px solid var(--line);padding:18px 20px;margin-bottom:20px}
.chart-head{font-size:14px;font-weight:600;margin-bottom:14px}
.chart{display:flex;align-items:flex-end;gap:6px;height:200px;overflow-x:auto;padding-bottom:6px}
.bar-wrap{flex:1 0 26px;display:flex;flex-direction:column;align-items:center;gap:6px;min-width:26px}
.bar{width:100%;border-radius:7px 7px 3px 3px;background:linear-gradient(180deg,var(--brand),var(--brand2));min-height:3px;transition:.3s}
.bar-label{font-size:10.5px;color:var(--muted);white-space:nowrap}
.bar-val{font-size:10.5px;color:#4a5568;font-weight:600}

.tbl{width:100%;border-collapse:collapse}
.tbl th{text-align:left;font-size:12.5px;color:var(--muted);font-weight:600;padding:10px 12px;border-bottom:1px solid var(--line);white-space:nowrap}
.tbl td{padding:12px;font-size:13.5px;border-bottom:1px solid #f3f5fa;vertical-align:top}
.tbl tr:hover td{background:#fafbff}
.tbl .ans{color:#5b6479;max-width:420px}
.tag{display:inline-block;font-size:11.5px;padding:3px 10px;border-radius:999px;background:#eef3ff;color:var(--brand)}
.tag.off{background:#f1f3f8;color:#98a1b3}
.op{border:0;background:transparent;color:var(--brand);font-size:13px;cursor:pointer;padding:2px 6px}
.op.del{color:#ef4444}
.btn-primary{border:0;color:#fff;font-size:14px;font-weight:600;padding:11px 24px;border-radius:11px;cursor:pointer;
  background:linear-gradient(135deg,var(--brand),var(--brand2));box-shadow:0 10px 24px rgba(79,124,255,.3);transition:.2s}
.btn-primary:hover{transform:translateY(-1px)}
.btn-ghost{border:1px solid var(--line);background:#fff;color:#5b6479;font-size:14px;padding:11px 24px;border-radius:11px;cursor:pointer;transition:.2s}
.btn-ghost:hover{border-color:var(--brand);color:var(--brand)}

.form-card{background:#fff;border:1px solid var(--line);border-radius:18px;padding:24px;max-width:620px;display:flex;flex-direction:column;gap:8px}
.form-card label{font-size:13px;color:#5b6479;margin-top:8px}
.form-card input,.form-card textarea,.form-card select{border:1px solid var(--line);border-radius:11px;padding:11px 13px;font-size:14px;font-family:inherit;outline:0;transition:.2s}
.form-card input:focus,.form-card textarea:focus,.form-card select:focus{border-color:var(--brand);box-shadow:0 0 0 4px rgba(79,124,255,.12)}
.form-card .btn-primary{align-self:flex-start;margin-top:16px}

/* 弹窗 */
.modal{position:fixed;inset:0;background:rgba(20,28,50,.42);display:flex;align-items:center;justify-content:center;z-index:300}
.modal[hidden]{display:none}
.modal-card{width:480px;max-width:92vw;background:#fff;border-radius:20px;padding:26px;display:flex;flex-direction:column;gap:8px;box-shadow:0 30px 80px rgba(20,28,50,.3)}
.modal-card h3{font-size:17px;margin-bottom:6px}
.modal-card label{font-size:13px;color:#5b6479;margin-top:6px}
.modal-card input,.modal-card textarea,.modal-card select{border:1px solid var(--line);border-radius:11px;padding:11px 13px;font-size:14px;font-family:inherit;outline:0;transition:.2s}
.modal-card input:focus,.modal-card textarea:focus,.modal-card select:focus{border-color:var(--brand);box-shadow:0 0 0 4px rgba(79,124,255,.12)}
.modal-foot{display:flex;justify-content:flex-end;gap:10px;margin-top:18px}

.toast{position:fixed;left:50%;top:26px;transform:translateX(-50%) translateY(-20px);opacity:0;background:#1b2233;color:#fff;
  font-size:13.5px;padding:11px 22px;border-radius:12px;z-index:500;transition:.28s;pointer-events:none}
.toast.show{opacity:1;transform:translateX(-50%) translateY(0)}

/* 数据统计工具区：自定义时间 + 导出/去重 */
.stats-tools{display:flex;align-items:center;gap:12px;flex-wrap:wrap}
.stats-actions{display:flex;gap:10px;margin-left:auto}
.custom-range{display:flex;align-items:center;gap:8px;background:#fff;border:1px solid var(--line);padding:5px 10px;border-radius:12px;font-size:13px;color:var(--muted)}
.custom-range[hidden]{display:none}
.custom-range input[type=date]{border:1px solid var(--line);border-radius:9px;padding:6px 10px;font-size:13px;font-family:inherit;outline:0;color:#4a5568}
.custom-range input[type=date]:focus{border-color:var(--brand)}

/* 悬浮客服组件：图标上传 */
.widget-icon-row{display:flex;align-items:center;gap:12px}
.widget-icon-preview{width:52px;height:52px;border-radius:14px;object-fit:cover;border:1px solid var(--line);background:#f3f6fd}
.widget-icon-preview[hidden]{display:none}
.nav-item{position:relative}
.nav-item[hidden]{display:none}
.nav-badge{position:absolute;top:6px;right:8px;min-width:18px;height:18px;line-height:18px;text-align:center;border-radius:999px;background:#ef4444;color:#fff;font-size:11px;padding:0 5px;box-shadow:0 3px 8px rgba(239,68,68,.4);font-weight:600}
.nav-badge[hidden]{display:none}
.nav-item.active .nav-badge{background:#fff;color:var(--brand)}
.order-tag{display:inline-block;font-size:11px;color:var(--brand);background:rgba(79,124,255,.1);padding:1px 6px;border-radius:6px;margin-bottom:3px;margin-right:4px}
.m .shake-bb{background:#fef2f2!important;color:#ef4444!important;border:1px solid #fde3e3}
.visitor-shake-tip{text-align:center;font-size:12.5px;color:#f59e0b;background:#fff7ed;border:1px solid #fde4bf;border-radius:10px;padding:7px 12px;margin:4px auto;max-width:80%}
.chat-area.shake{animation:kf-admin-shake .6s ease-in-out 2}
@keyframes kf-admin-shake{0%,100%{transform:translate(0,0)}20%{transform:translate(-5px,0)}40%{transform:translate(5px,0)}60%{transform:translate(-3px,0)}80%{transform:translate(3px,0)}}

@media (max-width:900px){
  .side{width:70px;flex:0 0 70px}
  .side-brand{font-size:0;justify-content:center;padding:0}
  .nav-item{font-size:0;text-align:center;padding:14px 0}
  .nav-item::before{content:'●';font-size:14px}
  .side-foot{display:none}
  .sess-list{width:200px;flex:0 0 200px}
}