/* B站：@VincentTV */
/* Share with you */
/* 主页：https://space.bilibili.com/402141442 */
/* 本视频：https://www.bilibili.com/video/av49252072 */
* {
  margin: 0;
  padding: 0;
}
.wrap {
  width: 100vw;
  height: 300vh;
  background: linear-gradient(to bottom, #c0392b, #16a085, #2980b9);
}
.wrap p {
  height: 100vh;
  line-height: 100vh;
  text-align: center;
  font-size: 100px;
}
.rocket {
  width: 30px;
  height: 60px;
  background: url(./rocket.png) top;
  background-size: cover;
  position: fixed;
  right: 50px;
  bottom: 50px;
  display: none;
}
.rocket:hover {
  background-position: bottom;
}