/* 备案 */
footer {
  position: relative;
  background-color: #f4f4f4;
  padding: 30px;
}

.footerbottom {
  color: #333;
  font-size: 14px;
  line-height: 2;
  opacity: .7;
  text-align: center;
}

.footerbottom a {
  color: #333;
  font-size: 14px;
  line-height: 2;
}

@media screen and (max-width: 1440px) and (min-width:0px) {}

@media screen and (max-width: 1200px) and (min-width:0px) {}

@media screen and (max-width: 992px) and (min-width:0px) {}

@media screen and (max-width: 640px) and (min-width:0px) {}