body {
    font-family: "Microsoft JhengHei";
    width: 1000px;
    margin: 0 auto;
    font-size: 20px;
    text-align: center;
}

#top {
    width: 50%;
}

#menu {
    width: 100%;
    margin: 0 auto;
    background: orange;
}

ul {
    margin: 0 auto;   
    padding: 0;
}

li {
    width: 80px;
    list-style: none;
    display: inline-block;
    margin: 25px 10px 5px;
}

a {
    color: rgb(16, 38, 233);
}

h1,p {
    margin-top: 0;
}

#content {
    background: #73E68C;
    width: 100%;
    margin: 0 auto;
    color: #483D8B;
    padding: 30px;
    box-sizing: border-box;
}

#btn {
    margin: 20px auto 0;
    width: 1000px;
    font-size: 30px;
    background: #46A3FF;
    color: #FFFFCE;
    padding: 15px;
    box-sizing: border-box;
    border: 3px #000079 solid;
}

#footer {
    background: rgb(237, 108, 215);
    width: 100%;
    height: 40px;
    margin: 0 auto;
    color: #FFEBCD;
    font-size: 25px;
    padding: 5px;
    box-sizing: border-box;
}