#feijidiv {
    width: 100%;
    max-width: 480px;
    margin: 0 auto;
    position: relative;
}
#feijidiv canvas.playing {
    cursor: none;
}
#feijidivmode {
    width: 13rem;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    border: #666 solid 2px;
    border-radius: 6px;
    position: absolute;
    font-size: 0.9rem;
    background-color: #ddd;
    color: #333;
    display: none;
}
.feijidivmode_head {
    height: 2.25rem;
    line-height: 2.25rem;
    font-weight: bold;
    text-align: center;
    border-bottom: #666 solid 2px; 
}
.feijidivmode_cents {
    height: 5rem;
    line-height: 5rem;
    font-weight: bold;
    text-align: center;
}
.feijidivmode_but {
    text-align: center;
    border-top: #666 solid 2px;
    padding: 0.5rem 0;
}
.feijidivmode_but button {
    width: 6rem;
    height: 1.5rem;
    border: #666 solid 2px;
    border-radius: 15px;
    font-size: 0.75rem;
    font-weight: bold;
    color: #333;
    cursor: pointer;
}
#goplay{
    position: absolute;
    bottom: 10rem;
    background-color: transparent;
    left: 50%;
    transform: translateX(-50%);
    padding: 0.5rem 2rem;
    border-radius: 6px;
    cursor: pointer;
    font-size: 1rem;
    user-select: none;
}