*{
    margin: 0;
    padding: 0;
    list-style: none;
}

audio{
    display: none;
}




.readynum{
    position: relative;
    z-index: 1100;
    font-size: 24px;
    color: #000;
    margin-left: 43%;
    transform: translateX(-50%);
}

.result{
    position: absolute;
    left: 50%;
    transform: translateX(-50%);
    z-index: 999;
}
/* background-size：cover;图片保持比例放大或缩小使X轴与Y轴都铺满整个容器，但图片超出容器部分会被裁剪掉，图片不变形。 */
/* background-size：contain；等比缩放，按照某一边来覆盖显示区域的，若区域大于图片的比例，会有白边，图片不会变形 */
body{
    width: 100%;
    height: 100vh;
    background-image: url('../img/back.png');
    background-size: contain;
    position: relative;
    overflow: hidden;
    /* css控制页面文字不能被选中user-select:none; */
    user-select: none;
}


.pause{
    position: absolute;
    left: 20px;
    top: 20px;
    cursor: pointer; /* 手型鼠标 */
    z-index: 999;
}


.start{
    position: absolute;
    left: 50%;
    top: 40%;
    transform: translate(-50%, -40%);
    display: flex;
    flex-direction: column;
    align-items: center;
    z-index: 999;
}



.ready{
position: absolute;
left: 50%;
top: 45%;
transform: translate(-50%, -45%);
display: flex;
flex-direction: column;
align-items: center;
z-index: 999;
}


.startBird{
    position: absolute;
    left: 100px;
    /* top: 50%;
    transform: translateY(-50%); */
    width: 34px;
    height: 24px;
    transition: all linear 0.15s;
    z-index: 999;
}




.choice{
    position: absolute;
    left: 50%;
    transform: translateX(-50%);
    top: 50%;
    margin-top: 40px;
}

.speed{
    padding: 6px;
    border-radius: 8px;
}



.birdTheme {
    width: 34px;
    height: 24px;
    position: absolute;
    left: 50%;
    top: 50%;
    transform: translate(-50%,-50%);
    margin: 15px 0;
    transition: all linear 0.15s;
    z-index: 999;
}
/* 小黄鸟 */
.yellow{
    width: 100%;
    height: 100%;
    background: url('../img/hn1.png');
}
/* 扇翅膀 */
@keyframes yellowMotion {
    0% {
        background: url("../img/hn1.png");
    }
    50% {
        background: url("../img/hn2.png");
    }
    100% {
        background: url("../img/hn3.png");
    }
}

/* 小红鸟 */
.red{
    width: 100%;
    height: 100%;
    background: url('../img/red1.png');
}
@keyframes redMotion {
    0% {
        background: url("../img/red1.png");
    }
    50% {
        background: url("../img/red2.png");
    }
    100% {
        background: url("../img/red3.png");
    }
}

/* 小蓝鸟 */
.blue{
    width: 100%;
    height: 100%;
    background: url('../img/blue1.png');
}
@keyframes blueMotion {
    0% {
        background: url("../img/blue1.png");
    }
    50% {
        background: url("../img/blue2.png");
    }
    100% {
        background: url("../img/blue3.png");
    }
}




.logo{}
.play{
    width: 60px;
    margin-top: 20px;
    cursor: pointer;
}



/* @keyframes创建动画:通过逐步改变,从一个CSS样式设定到另一个。可以设定多次。
单位是％，或关键字"from"和"to"。范围0-100 */


/* 上下飞 */
@keyframes birdShake {
    0% {
        transform: translateY(0px);
    }
    50% {
        transform: translateY(10px);
    }
    100% {
        transform: translateY(0px);
    }
}
/* 抬头低头 */
.up {
    transform: rotate(-38deg);
}

.down {
    transform: rotate(90deg);
}

.ground{
    position: absolute;
    width: 100%;
    height: 112px;
    left: 0;
    right: 0;
    bottom: 0;
    z-index: 1000;
}
.ground img{
    position: absolute;
    width: 100%;
    height: 100%;
}





/* 水管样式 */
.sg {
    width: 55px;
    position: absolute;
}
/* 点击事件隐藏和显示 */
.show {
    display: block !important;
}
.bird{
    display: none;
}
.hidden {
    display: none;
}