*{
    padding: 0;
    margin: 0;
}
a {
    text-decoration: none;
    padding: 0;
    margin: 0;
}
body{
    max-width: 720px;
    margin: 0 auto;
    position: relative;
}
.wrap {
    width: 100%;
    position: relative;
    max-width: 720px;
}
.my_body{
    width: 100%;
    max-width: 720px;
    font-size: 0;
}
.bg {
    width: 100%;
    height: 100%;
}
.download_bg {
    width: 100%;
    max-width: 720px;
    top: 17%;
    position: absolute;
}
.download_img {
    width: 100%;
}
.Android {
    position: absolute;
    width: 100%;
    bottom: 38%;
}
.Android_txt {
    float: left;
    margin-left: 20%;
    width: 23%;
}
.Android_btn {
    float: left;
    width: 32%;
}
.ios {
    position: absolute;
    width: 100%;
    bottom: 12%;
}
.ios_txt {
    float: left;
    margin-left: 20%;
    width: 23%;
}
.ios_btn {
    float: left;
    width: 32%;
}