antd-mobile/cjs/components/toast/toast.patch.css

<div align="center">

.adm-toast-mask .adm-toast-main {
  font-size: 15px;
}
.adm-toast-loading.adm-toast-loading {
  width: 48px;
  height: 48px;
  margin: 0 auto 8px;
}
.adm-toast-loading.adm-toast-loading .adm-spin-loading-fill {
  stroke: #ffffff;
}