编辑“︁模板:Test/character”︁

<templatestyles>
.fullscreen_card {
  position: fixed;
  inset: 0;
  z-index: -1;          /* 放到底层 */
  overflow: hidden;
}

.fullscreen_card img {
  width: 100%;
  height: 100%;
  object-fit: cover;    /* 等价于 background-size: cover */
  object-position: center;
}
</templatestyles>

<div class="fullscreen_card">
  [[File:test卡面.jpg|class=bgimg]]
</div>