body,
html {
    margin: 0;
    padding: 0;
    width: 100%;
    height: 100%;
    overflow: hidden;
    background-color: #111;
    line-height: 50px;
    text-align: center;
    font-family: Comic sans MS, Cambria, Cochin, Georgia, Times, Times New Roman, serif
}

canvas {
    display: none;
    border-style: solid;
    border-width: 6px;
    border-color: #FFFFFF;
    margin: 100px 0;
}

canvas:focus {
    outline: none
}

header {
    width: 340px;
    font-size: 0px;
}

h1 {
    display: inline-block;
    width: 100px;
    font-size: 32px;
    color: #ccc;
}

.wrap {
    margin-left: auto;
    margin-right: auto;
}

.score {
    display: inline-block;
    width: 240px;
    font-size: 25px;
    color: #ccc;
    text-align: right;
}

#gameOver {
    /* 游戏结束，暂时隐藏 */
    display: none;
    width: 100%;
    text-align: center;
    font-size: 25px;
    margin: 100px 0;
}

h2 {
    display: inline-block;
    margin: 0 auto;
}

#newgame_gameOver,
#setting_gameOver {
    font-size: 30px;
    cursor: pointer;
    display: block;
    color: #888;
}

#newgame_gameOver:hover,
#setting_gameOver:hover,
.again:hover {
    color: #eee;
}

#newgame_gameOver:hover::before,
#setting_gameOver:hover::before,
#menu a:hover::before {
    content: ">";
    margin-right: 10px;
}

.again {
    font-size: 35px;
    animation: logo-colorChange 500ms infinite linear;
    cursor: pointer;
}


/* menu */

#menu {
    display: block;
    width: 340px;
    padding: 95px 0px;
    margin: 0 auto;
    text-align: center;
    color: #eee;
    line-height: 100px;
}

@keyframes logo-colorChange {
    20% {
        color: yellow;
    }
    40% {
        color: coral;
    }
    60% {
        color: pink;
    }
    80% {
        color: cyan;
    }
}

#menu h2 {
    animation: logo-colorChange 500ms infinite linear;
    display: block;
    font-size: 35px;
}

#menu #newgame_menu,
#menu #setting_menu {
    display: block;
    font-size: 30px;
    cursor: pointer
}


/* settings */

#settings {
    /* 设置首先隐藏 */
    display: none;
    width: 100%;
    margin: 0 auto;
    padding: 85px 0px;
    font-size: 30px;
    color: #eee;
    text-align: center;
    line-height: 80px;
}

@keyframes logo-ani {
    50% {
        -webkit-transform: scale(1.3, 1.3)
    }
    100% {
        -webkit-transform: scale(1.0, 1.0)
    }
}

@-webkit-keyframes logo-ani {
    50% {
        -webkit-transform: scale(1.3, 1.3)
    }
    100% {
        -webkit-transform: scale(1.5, 1.5)
    }
}

#settings h2 {
    -webkit-animation: logo-ani 1000ms linear infinite;
    animation: logo-ani 1000ms linear infinite;
    margin-bottom: 100px;
    display: block;
    font-size: 50px;
}

#newgame_setting {
    display: block;
    margin: 50px 0;
    font-size: 35px;
    cursor: pointer;
}

#settings input {
    display: none;
}

#settings label {
    cursor: pointer;
    padding: 0 10px;
}

#settings input:checked+label {
    background: #000;
    color: yellow;
    padding: 10px;
    border-radius: 10px;
}