#mainshadow {
  position: fixed;
  left: 0;
  top: 0;
  width: 100%;
  height: 100%;
  background: rgb(229 229 229 / 30%);
    animation: fadein 3s;
    -moz-animation: fadein 3s; /* Firefox */
    -webkit-animation: fadein 3s; /* Safari and Chrome */
    -o-animation: fadein 3s; /* Opera */
  z-index: 99
}

@keyframes fadein {
    from {
        opacity:0;
    }
    to {
        opacity:1;
    }
}
@-moz-keyframes fadein { /* Firefox */
    from {
        opacity:0;
    }
    to {
        opacity:1;
    }
}
@-webkit-keyframes fadein { /* Safari and Chrome */
    from {
        opacity:0;
    }
    to {
        opacity:1;
    }
}
@-o-keyframes fadein { /* Opera */
    from {
        opacity:0;
    }
    to {
        opacity: 1;
    }
}

#mainshadow .main {
  width: 100%;
  border-radius: 2px;
  box-shadow: 0 10px 60px 0 rgba(29, 29, 31, 0.09);
  position: absolute;
  left: 0;
  top: 0;
  bottom: 0;
  right: 0;
  margin: auto;
  text-align: center;
}
#mainshadow .main .close {
  position: absolute;
  right: 5px;
  top: 5px;
  text-decoration: none;
  color: #333;
  display: block;
  text-align: center;
  font-size: 20px;
  background: #fff;
}
#mainshadow .main img {
  margin: auto;
  display: block;
}
#mainshadow .main .mk-side-form {
  margin-bottom: 28px;
}
#mainshadow .main .mk-side-form .pw-tip {
  font-weight: normal;
  font-size: 16px;
  text-align: center;
  margin: 20px auto;
}
#mainshadow .main .mk-side-form input {
    padding: 0px 13px;
    box-sizing: content-box;
    width: 80%;
    height: 50px;
    border: 2px solid #72abff;
    border-radius: 2px 0 2 5px;
    line-height: 28px;
}
#mainshadow .main .mk-side-form .btn {
  position: relative;
  overflow: visible;
  width: 40%;
  height: 48px;
  border-radius: 0 2px 2px 0;
  text-transform: uppercase;
  border: 0;
  background: #72abff;
  color: #fff;
  cursor: pointer;
  opacity: 1;
  user-select: none;
  display: inline-block;
  text-decoration: none; 
  #float: right;
}
#mainshadow .main .mk-side-form .tip {
  color: #ff0000;
  line-height: 40px;
  font-size: 12px;
}