page2的三个圈不显示出来

#page2 > .p2_circle {

position: absolute;

top:0;

right:0;

bottom:0;

left:0;

margin:auto;

border-radius:50%;

background: url("../images/p2_circle_outer.png") no-repeat center center;

background-size: 100%;

width: 59.375vw;

height: 59.375vw;

}

#page2 > .p2_circle:before {

position: absolute;

top:0;

right:0;

bottom: 0;

left: 0;

margin: auto;

border-radius:50%;

content: "";

background: url("../images/p2_circle_middle.png") no-repeat center center;

background-size: 100%;

width: 45.625vw;

height: 45.62vw;

}

#page2 > .p2_circle:after {

position: absolute;

top:0;

right:0;

bottom:0;

left:0;

margin:auto;

border-radius:50%;

content: "";

background:url("../images/p2_circle_inner.png") no-repeat center center;

background-size:100%;

width: 39.9375vw;

height: 39.9375vw;

}

#page2 > .p2_2016 {

position: absolute;

top:0;

right:0;

bottom: 0;

left: 0;

margin: auto;

background: url("../images/p2_2016.png") no-repeat center center;

background-size: 100%;

width: 27.5vw;

height: 6.24vh;

}