body {
  overflow: hidden;
  background-color: #FFFFFF;
  height: 100vh;
}

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

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

.FBBox {
  position: relative;
  min-height: calc(100% - 160px);
}

.FBBox_bottom {
  padding: 50px 15px;
  background-color: #F1F1F1;
  color: #191010;
  text-align: center;
}

/* 小于768px */
@media screen and (max-width: 768px) {
  .FBBox {
    position: relative;
    min-height: calc(100% - 300px);
  }

  .FBBox_bottom {
    padding-bottom: 60px;
  }
}