* {
    margin: 0;
    padding: 0;
}

body {
    background-color: skyblue;
}

#container {
    margin: 0px auto;
    width: 1000px;
    height: 680px;
    background-color: skyblue;
    border-radius: 100px;
}

#score {
    position: relative;
    width: 600px;
    height: 60px;
    background-color: pink;
    color: #fff;
    font-weight: bold;
    font-family: 'Times New Roman', Times, serif;
}

#header {
    position: absolute;
    height: 60px;
    padding: 0 30px;
    left: 50%;
    transform: translateX(-50%);
    font-size: 40px;
    border-right: 10px solid purple;
    border-left: 10px solid purple;
}

#scoreNum {
    position: absolute;
    right: 35px;
    bottom: 5px;
    font-size: 25px;
    color: red;
}

#survivalTime {
    position: absolute;
    left: 25px;
    bottom: 5px;
    font-size: 25px;
    color: black;
}

#background {
    position: relative;
    width: 600px;
    height: 340px;
    background-color: #eee;
    overflow: hidden;
}

#bgImg {
    position: absolute;
}

#bird {
    position: absolute;
    top: 10px;
    left: 150px;
    width: 60px;
    height: 47px;
    background: url(birdDown.png);
}

.block {
    position: absolute;
    right: 0;
    /* top: -300px; 此处由js随记生成，范围在（-300，-40）|| （40，300） */
    height: 340px;
    width: 60px;
    background: url(block.png);
}