.refundSuc-wrap{
    height: 100vh;
    background-color: #fff ;
}
body {
  width: 100%;
  height: 100%;
}
html > body > .mui-content {
  background: inherit;
  font-size: 14px;
  text-align: center;
}
.mui-content .doge {
  width: 100%;
  height: auto;
  margin-top: -66px;
}
.mui-content .txt {
  width: 50%;
  height: auto;
}
#know_btn {
    position: relative;
    left: 50%;
    -webkit-transform: translateX(-50%);
            transform: translateX(-50%);
  margin: 0 auto;
  margin-top: -90px;
  padding: 0;
  background: #292928;
  color: #ffda43;
  border-color: #292928;
  border-radius: 5px;
  width: 48%;
  font-weight: bold;
  height: 45px;
  line-height: 45px;
  font-size: 16px;
}