body {
    margin: 0;
  font: 14px "Lucida Grande", Helvetica, Arial, sans-serif;
}

a {
  color: #00B7FF;
}
.index-content{
	height: calc(100vh - 40px);
    display: flex;
    align-items: center;
    justify-content: center;
    text-align: center;
}
#content{
	width: 1000px;
	margin: 0 auto;
}
.beian{
    text-align: center;
}