.defaultButton{
    width: 80%;
    display: block;
    margin: 20px auto;
    height: 40px;
    border-radius: 10px;
    background: skyblue;
    color: #fff;
    border: none;
    outline: none;
}
.defaultButton:active{
    background: #ccc;
}

.bf_dialog{
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.4);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 9999;
    /* display: none; */
}
.bf_dialog_box{
    width: 275px;
    text-align: center;
    border-radius: 13px;
    overflow: hidden;
    transition: all 0.3s cubic-bezier(0.43, 0.14, 0.34, 1.6);
}
.bf_dialog_title{
    padding: 8px 0px;
    font-size: 16px;
    background: #fff;
}
.bf_dialog_content{
    padding: 10px;
    box-sizing: border-box;
    background: #fff;
    padding-bottom: 20px;
}
.bf_dialog_footer{
    border-top: 1px solid #f2f2f2;
    display: flex;
    background: #fff;
}
.bf_dialog_footer button{
    flex-grow: 1;
    width: 0;
    appearance: none;
    border: none;
    background: #fff;
    height: 40px;
    border-right: 1px solid #f2f2f2;
    color: #007aff;
    outline: none;
}
.bf_dialog_footer button:active{
  background: #f2f2f2;
}


.toast{
  padding:10px 20px;
  background: rgba(0, 0, 0, 0.6);
  color: #fff;
  position: fixed;
  bottom: 80px;
  left: 50%;
  transform: translateX(-50%);
  border-radius: 12px;
  transition: all 0.4s;
  font-size: 14px;
  z-index: 9999;
}





















.lds-roller {
  display: inline-block;
  position: relative;
  width: 64px;
  height: 64px;
}
.lds-roller div {
  animation: lds-roller 1.2s cubic-bezier(0.5, 0, 0.5, 1) infinite;
  transform-origin: 32px 32px;
}
.lds-roller div:after {
  content: " ";
  display: block;
  position: absolute;
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: #fff;
  margin: -3px 0 0 -3px;
}
.lds-roller div:nth-child(1) {
  animation-delay: -0.036s;
}
.lds-roller div:nth-child(1):after {
  top: 50px;
  left: 50px;
}
.lds-roller div:nth-child(2) {
  animation-delay: -0.072s;
}
.lds-roller div:nth-child(2):after {
  top: 54px;
  left: 45px;
}
.lds-roller div:nth-child(3) {
  animation-delay: -0.108s;
}
.lds-roller div:nth-child(3):after {
  top: 57px;
  left: 39px;
}
.lds-roller div:nth-child(4) {
  animation-delay: -0.144s;
}
.lds-roller div:nth-child(4):after {
  top: 58px;
  left: 32px;
}
.lds-roller div:nth-child(5) {
  animation-delay: -0.18s;
}
.lds-roller div:nth-child(5):after {
  top: 57px;
  left: 25px;
}
.lds-roller div:nth-child(6) {
  animation-delay: -0.216s;
}
.lds-roller div:nth-child(6):after {
  top: 54px;
  left: 19px;
}
.lds-roller div:nth-child(7) {
  animation-delay: -0.252s;
}
.lds-roller div:nth-child(7):after {
  top: 50px;
  left: 14px;
}
.lds-roller div:nth-child(8) {
  animation-delay: -0.288s;
}
.lds-roller div:nth-child(8):after {
  top: 45px;
  left: 10px;
}
@keyframes lds-roller {
  0% {
    transform: rotate(0deg);
  }
  100% {
    transform: rotate(360deg);
  }
}