#pb-tess-cs-root{position:fixed;right:18px;bottom:18px;z-index:999999;font-family:system-ui,-apple-system,Segoe UI,Roboto,sans-serif}
#pb-tess-cs-btn{width:56px;height:56px;border-radius:50%;border:0;background:#0b3d2e;color:#fff;font-size:22px;cursor:pointer;box-shadow:0 6px 18px rgba(0,0,0,.25)}
#pb-tess-cs-btn:hover{background:#0f5240}
#pb-tess-cs-panel{display:none;position:absolute;right:0;bottom:70px;width:min(360px,92vw);height:480px;background:#fff;border-radius:14px;box-shadow:0 12px 40px rgba(0,0,0,.28);overflow:hidden;flex-direction:column;border:1px solid #e6e6e6}
#pb-tess-cs-root.open #pb-tess-cs-panel{display:flex}
#pb-tess-cs-head{background:#0b3d2e;color:#fff;padding:12px 14px;font-weight:600;display:flex;justify-content:space-between;align-items:center}
#pb-tess-cs-head small{font-weight:400;opacity:.85}
#pb-tess-cs-msgs{flex:1;overflow:auto;padding:12px;background:#f7f8f7}
.pb-tess-msg{margin:0 0 10px;max-width:90%;padding:8px 10px;border-radius:10px;line-height:1.35;font-size:14px;white-space:pre-wrap}
.pb-tess-msg.user{background:#0b3d2e;color:#fff;margin-left:auto}
.pb-tess-msg.bot{background:#fff;border:1px solid #e5e5e5;color:#222}
.pb-tess-msg.sys{background:transparent;color:#666;font-size:12px;text-align:center}
#pb-tess-cs-form{display:flex;gap:6px;padding:10px;border-top:1px solid #eee;background:#fff}
#pb-tess-cs-input{flex:1;border:1px solid #ccd;border-radius:8px;padding:8px 10px;font-size:14px}
#pb-tess-cs-send{border:0;background:#0b3d2e;color:#fff;border-radius:8px;padding:8px 12px;cursor:pointer}
#pb-tess-cs-send:disabled{opacity:.5;cursor:wait}