/* ============================================================
   用户端客服浮窗
   ============================================================ */
.svc-fab {
  position: fixed; left: calc(var(--sidebar-w) + 18px); bottom: 22px; z-index: 250;
  width: 52px; height: 52px; border-radius: 50%;
  background: linear-gradient(145deg, var(--accent-hover), var(--gold));
  color: #0A1218; display: grid; place-items: center;
  box-shadow: 0 12px 32px rgba(120,35,45,.3);
  cursor: pointer; transition: transform .2s var(--ease);
}
.svc-fab:hover { transform: translateY(-3px); }
.svc-fab .icon { width: 24px; height: 24px; }
.svc-fab .svc-badge {
  position: absolute; right: -2px; top: -2px; min-width: 19px; height: 19px;
  border-radius: 10px; background: var(--gold); color: #0A1218;
  font-size: 11px; font-weight: 700; display: grid; place-items: center;
  border: 2.5px solid var(--surface);
}
.svc-panel {
  position: fixed; left: calc(var(--sidebar-w) + 18px); bottom: 86px; z-index: 250;
  width: 350px; height: 520px; max-height: calc(100vh - 120px);
  background: var(--elevated); border: 1px solid var(--border);
  border-radius: 18px; box-shadow: var(--shadow-lg);
  display: flex; flex-direction: column; overflow: hidden;
  animation: svcIn .28s var(--ease-spring);
}
@keyframes svcIn { from { opacity: 0; transform: translateY(16px) scale(.97); } to { opacity: 1; transform: none; } }
/* 未登录（登录/注册页）时没有侧边栏，浮窗贴左显示 */
.auth-gate ~ .svc-fab, .auth-gate ~ .svc-panel { left: 18px; }
.svc-head {
  flex: none; padding: 14px 15px; color: #0A1218;
  background: linear-gradient(135deg, var(--accent-hover), var(--gold));
  display: flex; align-items: center; gap: 11px;
}
.svc-head .sh-info { flex: 1; min-width: 0; }
.svc-head .sh-name { font-size: 14px; font-weight: 600; display: flex; align-items: center; gap: 7px; }
.svc-head .sh-sub { font-size: 11px; opacity: .82; margin-top: 2px; }
.svc-head .icon-btn { color: rgba(255,255,255,.85); }
.svc-head .icon-btn:hover { background: rgba(255,255,255,.16); color: #fff; }
.svc-body { flex: 1; overflow-y: auto; padding: 14px; display: flex; flex-direction: column; gap: 10px; background: var(--surface-2); }
.svc-day { align-self: center; font-size: 10.5px; color: var(--faint); }
.svc-bubble { max-width: 82%; padding: 9px 12px; border-radius: 13px; font-size: 12.5px; line-height: 1.65; word-break: break-word; }
.svc-bubble.agent { align-self: flex-start; background: var(--surface); border: 1px solid var(--border); box-shadow: var(--shadow-xs); }
.svc-bubble.user { align-self: flex-end; background: linear-gradient(180deg, #D9BC7E, #C89B3C); color: #0A1218; }
.svc-bubble.sys { align-self: center; background: var(--surface-3); color: var(--faint); font-size: 11px; max-width: 96%; text-align: center; }
.svc-meta { font-size: 10px; opacity: .65; margin-top: 3px; }
.svc-assign-card {
  align-self: stretch; display: flex; gap: 11px; align-items: center;
  border: 1px dashed var(--border-strong); border-radius: 13px; padding: 12px;
  background: var(--surface);
}
.svc-assign-card .sac-ic { width: 38px; height: 38px; border-radius: 11px; background: var(--gold-soft); color: var(--gold); display: grid; place-items: center; flex: none; }
.svc-assign-card .sac-t { font-size: 12.5px; font-weight: 600; }
.svc-assign-card .sac-s { font-size: 11px; color: var(--faint); margin-top: 2px; line-height: 1.6; }
.svc-quick { display: flex; flex-wrap: wrap; gap: 6px; padding: 0 12px 8px; background: var(--surface-2); }
.svc-quick button { font-size: 11px; background: var(--surface); border: 1px solid var(--border); border-radius: 99px; padding: 4px 11px; color: var(--muted); }
.svc-quick button:hover { border-color: var(--accent); color: var(--accent); }
.svc-input { flex: none; display: flex; gap: 8px; padding: 11px 12px; border-top: 1px solid var(--border); background: var(--surface); align-items: flex-end; }
.svc-input textarea {
  flex: 1; border: 1px solid var(--border-strong); border-radius: 10px;
  resize: none; height: 38px; max-height: 90px; padding: 9px 11px; outline: none;
  background: var(--surface); color: var(--text); font-size: 12.5px; font-family: inherit;
}
.svc-input textarea:focus { border-color: var(--accent); }
.svc-closed-tip { text-align: center; font-size: 11.5px; color: var(--faint); padding: 10px; }
@media (max-width: 860px) {
  .svc-fab, .svc-panel { left: 84px; }
}