* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}
html, body {
    background-color: #50afef;
}
.app {
    width: 100%;
}
.bgapp {
    position: relative;
    max-width: 450px;
    margin: auto;
}
.an-bg,.ios-bg{
    width: 100%;
    height: auto;
    display: none;
}
.download-btn {
    cursor: pointer;
    position: fixed;
    left: 50%;
    bottom: 40px;
    transform: translateX(-50%);
    width: 347px;
    height: 50px;
    background: #2488FA;
    box-shadow: 0px 3px 5px 0px rgba(255,255,255,0.28);
    border-radius: 32px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 22px;
    color: #FFFFFF;
    text-align: center;
    line-height: 20px;
    font-weight: 800;
    border: 0;
}