html,

body {

? ? height: 100%;

}

.page {

? ? position: absolute;

? ? width: 100%;

? ? height: 100%;

}

#page>.bg {

? ? position: absolute;

? ? z-index: -1;

? ? width: 100%;

? ? height: 100%;

}

#page1>.bg {

? ? background: url("../images/p1_bg.jpg") no-repeat center center;

? ? background-size: 100%;

}

#page2>.bg {

? ? background: url("../images/p2_bg.jpg")no-repeat center center;

? ? background-size: 100%;

}

#page3>.bg {

? ? background: url("../images/p3_bg.jpg")no-repeat center center;

? ? background-size: 100%;

}