/*主页的样式*/
.top img
{
    position: absolute;
    width: 100%;
    vertical-align: middle;
}
.download img
{
    position:absolute;
    top: 4.95rem;
    right: 0.5rem;
    width: 44%;
}
.help img
{
    position:absolute;
    top: 6.15rem;
    right: 0.5rem;
    width: 44%;
}
.erwei img
{
    position:absolute;
    left: 0.83rem;
    top: 4.95rem;
    width: 30.5%;
}

/*帮助界面的样式*/
.describe
{
    position: absolute;
    width: 100%;
    vertical-align: middle;
}
.back
{
    position: relative;
    left: 2.5rem;
    top: 35.3rem;
    width: 35%;
}