body {
    height: 100vh;
    width: 100vw;
    margin: 0 auto;
    overflow: hidden;
}
.wrapper {
    width: 100%;
    height: 100%;
}

.index_Wapper {
    background: url(../images/index-bg.png) center top;
    width: 1920px;
    height: 1080px;
    position: relative;
}

.index_Wapper h1 {
    text-indent: -9999px;
}