#chtBtn{position:fixed;right:22px;bottom:22px;width:60px;height:60px;border-radius:50%;background:#0A1E3C;color:#fff;border:none;cursor:pointer;z-index:300;box-shadow:0 10px 28px rgba(10,30,60,.35);display:flex;align-items:center;justify-content:center;transition:transform .2s,background .2s;}
#chtBtn svg{width:26px;height:26px;}
#chtBtn:hover{background:#143366;transform:translateY(-2px);}
#chtBtn::after{content:"";position:absolute;inset:-4px;border-radius:50%;border:2px solid rgba(59,130,246,.5);animation:chtPulse 2.2s ease-out infinite;}
@keyframes chtPulse{0%{opacity:.9;transform:scale(.9);}70%{opacity:0;transform:scale(1.15);}100%{opacity:0;}}
#chtPanel{position:fixed;right:22px;bottom:96px;width:368px;max-width:calc(100vw - 24px);height:540px;max-height:calc(100vh - 130px);background:#fff;border-radius:18px;box-shadow:0 24px 60px rgba(10,30,60,.28);z-index:300;display:flex;flex-direction:column;overflow:hidden;transform:translateY(14px) scale(.98);opacity:0;visibility:hidden;transition:opacity .18s,transform .18s,visibility .18s;font-family:'Inter',-apple-system,'Segoe UI',Roboto,Helvetica,Arial,sans-serif;}
#chtPanel.open{opacity:1;visibility:visible;transform:translateY(0) scale(1);}
.cht-head{background:#0A1E3C;color:#fff;padding:16px 18px;display:flex;align-items:center;gap:12px;}
.cht-logo{width:38px;height:38px;border-radius:10px;background:#fff;color:#0A1E3C;font-weight:800;font-size:19px;display:flex;align-items:center;justify-content:center;flex-shrink:0;}
.cht-titles{flex:1;display:flex;flex-direction:column;line-height:1.25;}
.cht-titles strong{font-size:15px;font-weight:700;}
.cht-status{font-size:11.5px;color:#93C5FD;}
.cht-close{background:none;border:none;color:#93C5FD;font-size:22px;cursor:pointer;line-height:1;padding:4px;}
.cht-close:hover{color:#fff;}
.cht-msgs{flex:1;overflow-y:auto;padding:16px;background:#F8FAFC;display:flex;flex-direction:column;gap:10px;}
.cht-msg{max-width:82%;padding:10px 14px;border-radius:14px;font-size:13.5px;line-height:1.5;word-wrap:break-word;}
.cht-bot{background:#fff;border:1px solid #E2E8F0;color:#334155;align-self:flex-start;border-bottom-left-radius:4px;white-space:pre-wrap;}
.cht-user{background:#0A1E3C;color:#fff;align-self:flex-end;border-bottom-right-radius:4px;}
.cht-typing{display:flex;gap:4px;align-items:center;padding:12px 14px;}
.cht-typing span{width:7px;height:7px;border-radius:50%;background:#CBD5E1;animation:chtBlink 1.2s infinite;}
.cht-typing span:nth-child(2){animation-delay:.2s;}
.cht-typing span:nth-child(3){animation-delay:.4s;}
@keyframes chtBlink{0%,60%,100%{opacity:.3;}30%{opacity:1;}}
.cht-transfer{display:block;align-self:flex-start;background:#DBEAFE;color:#1D4ED8;font-weight:600;font-size:13px;padding:10px 14px;border-radius:12px;text-decoration:none;margin-left:52px;}
.cht-transfer:hover{background:#BFDBFE;}
.cht-chips{display:flex;gap:8px;padding:0 16px 12px;flex-wrap:wrap;background:#F8FAFC;}
.cht-chip{background:#fff;border:1px solid #CBD5E1;color:#0A1E3C;font-size:12.5px;font-weight:600;padding:7px 14px;border-radius:999px;cursor:pointer;font-family:inherit;}
.cht-chip:hover{background:#0A1E3C;color:#fff;border-color:#0A1E3C;}
.cht-form{display:flex;gap:8px;padding:12px 14px 16px;background:#fff;border-top:1px solid #E2E8F0;}
.cht-form input{flex:1;border:1px solid #CBD5E1;border-radius:999px;padding:11px 16px;font-size:13.5px;font-family:inherit;outline:none;color:#334155;}
.cht-form input:focus{border-color:#3B82F6;box-shadow:0 0 0 3px rgba(59,130,246,.15);}
.cht-form button{width:44px;height:44px;border-radius:50%;background:#0A1E3C;color:#fff;border:none;cursor:pointer;font-size:15px;flex-shrink:0;}
.cht-form button:hover{background:#143366;}
@media (max-width:560px){
  #chtPanel{right:12px;bottom:86px;width:calc(100vw - 24px);height:min(580px,calc(100vh - 110px));}
  #chtBtn{right:16px;bottom:16px;}
}