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

body {
    width: 100%;
    height: 100vh;
    position: relative;
    overflow: hidden;
    user-select: none;
    background-image: url(../img/back.png);
    background-size: contain;
}





.stop {
    position: absolute;
    left: 10px;
    top: 10px;
    z-index: 999;
    cursor: pointer;
}

.continue {
    position: absolute;
    left: 10px;
    top: 10px;
    z-index: 999;
    cursor: pointer;
}

.voice,
.Mute {
    width: 28px;
    height: 30px;
    position: absolute;
    left: 50px;
    top: 10px;
    z-index: 999;
    cursor: pointer;
}


.score {
    position: absolute;
    z-index: 1000;
    top: 20px;
    left: 50%;
    transform: translateX(-50%);
}

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

.start .play {
    width: 70px;
    margin-top: 20px;
    cursor: pointer;
}

.grade {
    display: flex;
    width: 100%;
    flex-direction: column;
    align-items: center;
}

.grade div {
    text-align: center;
    display: flex;
    width: 70%;
    margin: 5px;
    padding: 5px;
    background: white;
    border: 1px solid black;
    border-radius: 4px;
    align-items: center;
    justify-content: center;
    text-shadow: 2px 1px 3px rgb(98 87 87 / 74%);
    letter-spacing: 5px;
    font-size: 17px;
    box-shadow: 3px 2px 5px rgb(26 25 25 / 74%);
    cursor: pointer
}


.color {
    width: 100%;
    height: 70px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 5px;
    box-sizing: border-box;
}

.color div {
    cursor: pointer
}


.ground {
    position: absolute;
    height: 112px;
    width: 100%;
    left: 0;
    right: 0;
    bottom: 0;
    z-index: 999;
}

.ground img {
    position: absolute;
    width: 100%;
    height: 100%;
}

.bird {
    width: 34px;
    height: 24px;
    position: absolute;
    z-index: 999;
    left: 100px;
    transition: all linear 0.15s;
}


.up {
    transform: rotate(-38deg);
}

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

/* 黄色的鸟 */
@keyframes yelloBirdmove {
    0% {
        background-image: url(../img/hn1.png);
    }

    50% {
        background-image: url(../img/hn2.png);
    }

    100% {
        background-image: url(../img/hn3.png);
    }
}

/* 蓝色的鸟 */
@keyframes blueBirdmove {
    0% {
        background-image: url(../img/bn1.png);
    }

    50% {
        background-image: url(../img/bn2.png);
    }

    100% {
        background-image: url(../img/bn3.png);
    }
}

/* 红色的鸟 */
@keyframes redBirdmove {
    0% {
        background-image: url(../img/rn1.png);
    }

    50% {
        background-image: url(../img/rn2.png);
    }

    100% {
        background-image: url(../img/rn3.png);
    }
}

@keyframes birdfly {
    0% {
        transform: translateY(0px);
    }

    50% {
        transform: translateY(10px);
    }

    100% {
        transform: translateY(0px);
    }
}

.waterpipe {
    width: 55px;
    position: absolute;
}

.hidden {
    display: none;
}