body {
  overflow: hidden;
  background-color: white;
  height: 100vh;
  overflow-y: hidden;
}

.page {
  width: 100%;
  height: 100vh;
  overflow-x: hidden;
  background-color: white;
  color: black;
  padding-top: 70px;

  position: relative;
  padding-bottom: 250px;
}

#menu {
  height: 70px;
  position: fixed;
  width: 100%;
  z-index: 900;
  top: 0px;
  left: 0px;
}

.FBBox {
  position: relative;
  overflow: hidden;
  /* min-height: calc(100% - 250px); */

  min-height: 100%;
}

.FBBox_bottom {
  padding: 50px 15px;
  background-color: #150425;
  color: white;
  text-align: center;

  width: 100%;
  position: absolute;
}

/* 小于768px */
@media screen and (max-width: 768px) {
  .page {
    padding-top: 60px;
  }

  #menu {
    height: 60px;
  }

  .FBBox {
    position: relative;
    /* min-height: calc(100% - 250px); */
    min-height: 100%;
  }

  .FBBox_bottom {
    padding-bottom: 80px;
  }

  .FBBox_bottom h1 {
    font-size: 22px;
  }
}