.bd__button {
  padding: 10px 0;
  text-align: right;
}
.bd__button > a{
  font-weight: 100;
  text-decoration: none;
  color: #BDC3CB;
  font-family: sans-serif;
}
.bd__button > a:hover {
  color: #798897;
}

/*滚动条样式*/
div::-webkit-scrollbar {
  width: 4px;
}
div::-webkit-scrollbar-thumb {
  border-radius: 10px;
  box-shadow: inset 0 0 5px rgba(0,0,0,0.2);
  background: rgba(0,0,0,0.2);
}
div::-webkit-scrollbar-track {
  box-shadow: inset 0 0 5px rgba(0,0,0,0.2);
  border-radius: 0;
  background: rgba(0,0,0,0.1);

}