@keyframes barrage{
    from{
      left:100%;
      transform:translateX(0);
    }
    to{
      left:0;
      transform:translateX(-100%);
    }
  }
  
  .block {
    position:absolute;
    top: 50%;
    left: 100%;
    width: 100%;
    color: #fff;
  }
.container {
    width: 100%;
    margin-top: 100px;

}
.mask-image {
    position: relative;
    margin: 0 auto;
    width: 70%;
}
.image {
    width: 100%;
    display:block;
}
.mask {
     -webkit-mask-image: url(./mask.png);
    -webkit-mask-size: cover;
    position: absolute;
    top: 0;
    width: 100%;
    height: 100%;
}
.span {
    display: block;
    color: red;
    margin-left: 250px;
    margin-top: 100px;
}
.button {
    display:block;
    margin: 0 auto;
    margin-top: 10px;
}