.ch-btn{position:fixed;right:18px;bottom:18px;z-index:70;display:flex;align-items:center;gap:8px;background:#f26a1b;color:#fff;border:0;border-radius:999px;padding:13px 18px;font:800 1rem/1 inherit;font-family:inherit;box-shadow:0 6px 20px rgba(14,26,47,.35);cursor:pointer}
.ch-btn:hover{background:#d9550a}.ch-btn .dot{width:10px;height:10px;border-radius:50%;background:#ffd166;display:none}.ch-btn.new .dot{display:inline-block}
.ch-box{position:fixed;right:18px;bottom:80px;z-index:71;width:360px;max-width:calc(100vw - 24px);height:500px;max-height:calc(100vh - 120px);background:#fff;border-radius:16px;box-shadow:0 12px 40px rgba(14,26,47,.35);display:none;flex-direction:column;overflow:hidden;font-family:inherit}
.ch-box.open{display:flex}
.ch-hd{background:#0e1a2f;color:#fff;padding:12px 14px;display:flex;align-items:center;gap:10px;border-bottom:3px solid #f26a1b}.ch-hd b{flex:1;font-size:1rem}.ch-hd small{display:block;font-weight:400;color:#a9b8d0;font-size:.78rem}
.ch-x{background:none;border:0;color:#fff;font-size:1.5rem;cursor:pointer;line-height:1}
.ch-log{flex:1;overflow-y:auto;padding:12px;background:#f4f6f9;display:flex;flex-direction:column;gap:8px}
.ch-m{max-width:82%;padding:8px 11px;border-radius:12px;font-size:.93rem;line-height:1.35;white-space:pre-wrap;word-wrap:break-word;color:#172033}
.ch-m.c{align-self:flex-end;background:#ffe2cf;border-bottom-right-radius:4px}.ch-m.o{align-self:flex-start;background:#fff;border:1px solid #e3e8ef;border-bottom-left-radius:4px}
.ch-m time{display:block;font-size:.7rem;color:#5d6b80;margin-top:3px}.ch-sys{align-self:center;font-size:.8rem;color:#5d6b80;text-align:center}
.ch-f{padding:10px;border-top:1px solid #e3e8ef;display:flex;flex-direction:column;gap:6px}
.ch-f input,.ch-f textarea{width:100%;box-sizing:border-box;border:1px solid #cdd5e0;border-radius:10px;padding:9px 10px;font:inherit;font-size:.93rem;color:#172033}
.ch-f textarea{resize:none;height:62px}.ch-f .hp{position:absolute;left:-9999px;width:1px;height:1px;opacity:0}
.ch-row{display:flex;gap:6px;align-items:center}.ch-row small{flex:1;color:#5d6b80;font-size:.74rem}
.ch-send{background:#f26a1b;color:#fff;border:0;border-radius:10px;padding:10px 16px;font-weight:800;cursor:pointer}.ch-send:disabled{opacity:.6}
.ch-err{color:#c62828;font-size:.8rem;min-height:1em}
@media(max-width:959px){.ch-btn{bottom:66px;right:12px;padding:11px 15px}.ch-box{right:8px;left:8px;width:auto;bottom:116px;height:auto;top:80px;max-height:none}}