.navbar .logo {
    width:180px;
}
.tag_frac {
    text-align: center;
}
.title {
    width: 200px;
    height: 80px;
    text-align: center;
    margin: 10px 20px;
    font-size: 18px;
    line-height: 80px;
    font-weight: bold;
}

.introduction p {
    font-size: 16px;
    line-height: 50px;
    margin: 10px 20px;
}

h1 a{
    font-size: 25px;
    margin-left: 20px;
    color: blue;
}

.part1 p{
    font-size: 16px;
    line-height: 40px;
    margin: 10px 20px;
}

.part1_setting {
    width: 50%;
    margin-left: 20px;
}

#data_viewer_part {
    margin-top: 20px;
}

.part2 .p1{
    font-weight: bold;
    font-style: italic;
    font-size: 16px;
    line-height: 40px;
    margin-left: 20px;
}

.part2 .p2 {
    font-size: 16px;
    line-height: 40px;
    margin-left: 20px;
}
.part3 .p2 {
    font-size: 16px;
    line-height: 40px;
    margin-left: 20px;
}

.part2 img {
    width: 50%;
    margin: 10px 20px;
}
.part3 img {
    width: 50%;
    margin: 10px 20px;
}
.part2_2_setting {
    height: 600px;
}


.part3 .p1{
    font-weight: bold;
    font-style: italic;
    font-size: 16px;
    line-height: 40px;
    margin-left: 20px;
}
.part4 .p2 {
    font-size: 16px;
    line-height: 40px;
    margin-left: 20px;
}

.bottom_info {
    width: 100%;
    height: 80px;
    margin: 10px auto;
    font-size: 15px;
    padding-left: 20px;
    padding-right: 20px;
}


.info1 {
    float: left;
    line-height: 20px;
    margin-right: 250px;
}
.info2 {
    float: left;
    margin-right: 100px;
}
.info3 {
    float:right;
}