.poster-box{
  display: flex;
  justify-content: center;
  flex-wrap: wrap;
  margin: 60px auto 0;
  align-items: center;
}
.poster-box .txt{
  font-size: 22px;
  font-weight: bold;
  text-align: right;
}
.poster-box .img{
  width: 40%;
}

@media screen and (max-width: 750px) {
  .poster-box .txt {
    font-size: 16px;
    text-align: center;
  }
  .poster-box .img {
    width: 65%;
  }
}