* {
  box-sizing: border-box;
}

html,
body {
  margin: 0;
  background: #f0f0f0;
  font-family: Arial, "Microsoft YaHei", sans-serif;
}

.poster-page {
  width: 100vw;
  margin: 0;
  background: #fff;
}

.poster-block {
  margin: 0;
  padding: 0;
  line-height: 0;
}

.poster-block img {
  width: 100%;
  height: auto;
  display: block;
}