body {
    font-family: Georgia, "Times New Roman", serif, sans-serif,
    "Microsoft YaHei",  STXihei, -apple-system,
    BlinkMacSystemFont, "Segoe UI", Roboto;
    margin: 0px;
    background-color: #b5a789;

}

header{
    background-color: #675c47;
    margin: 5px 10px 0px 10px;
    height: 80px;
    text-align: center;
    width: 920px;
    padding: 2px 0px 15px 0px;
    /*border: thin solid blue;*/
    margin-left: auto;
    margin-right: auto;
    color: yellowgreen;
}

div#tableContainer {
    display: table;
    border-spacing: 10px;
    margin-left: auto;
    margin-right: auto;
}

div#tableRow {
    display: table-row;
}

.biaoti {
    font-size: 200%;
}

section#leftSide {
    display: table-cell;
    text-align: left;
    background-color: #efe5d0;
    padding: 20px 30px 120px 20px;
    /*margin: 0px 10px 0px 0px;*/
    float: left;
    width: 180px;
    font-size: 150%;
    /*border: 5px solid black;*/
}

li{
    margin: 0% 0%;
}

section#main {
    display: table-cell;
    background: #efe5d0;
    padding: 0px 100px 0px 100px;
    vertical-align: top;
    /*border: 5px solid blue;*/
    text-align: center;
    margin: 0px 120px 0px 120px;
}

.mainreading {
    background-image: url(Reading/003_cat_reading.jpg);
    background-repeat: no-repeat;
    background-position: center;
    font-size: 200%;
    color: yellowgreen;
    padding: 30px 150px 45px 150px;
    margin: 10px;
}

.meditation {
    background-image: url(Meditation/001_meditation.jpeg);
    background-repeat: no-repeat;
    background-position: center;
    font-size: 200%;
    color: yellowgreen;
    padding: 30px 10px 45px 10px;
    margin: 20px;
}

.coding {
    background-image: url(Coding/001_coding.jpeg);
    background-repeat: no-repeat;
    background-position: center;
    font-size: 200%;
    color: yellowgreen;
    padding: 45px 10px 30px 10px;
    margin: 20px;
}

.investment {
    background-image: url(Stock/002_investment.jpeg);
    background-repeat: no-repeat;
    background-position: center;
    font-size: 200%;
    color: yellowgreen;
    padding: 30px 10px 30px 10px;
    margin: 20px;
}

footer {
    width: 912px;
    background-color: #675c47;
    color: #efe5d0;
    text-align: center;
    padding: 5px;
    margin: 0px;
    font-size: 300%；
    display: block;
    margin-left: auto;
    margin-right: auto;
}

nav {
    background-color: #efe5d0;
    margin: 10px 10px 0px 10px;
    width: 920px;
    margin-left: auto;
    margin-right: auto; 
    font-size: 150%;
}

nav ul {
    margin: 0px;
    list-style-type: none;
    padding: 5px 0px 5px 0px;
}

nav ul li {
    display: inline;
    padding: 5px 10px 5px 10px;
}