< type="text/css">
html,
body,
div,
img {
margin: 0;
padding: 0;
border: 0;
font-size: 100%;
font: inherit;
vertical-align: baseline;
height: 100%;
}
.index {
width: 100%;
height: 100%;
/* 加载背景图 */
background: url("https://ydlunacommon-cdn.nosdn.127.net/15dab0042cf3fe2e02744fb58bbe1ad4.png") no-repeat;
background-size: 100%100%;
display: flex;
align-items: center;
justify-content: center;
}
.content {
width: 406px;
height: 453px;
display: block;
position: relative;
}
