.duanluo {
    font-size: 20px;
    text-indent: 2em;
    line-height: 43px;
    margin: 0;
}
.title {
    margin: 30px 0 0 0;
    line-height: 74px;
    font-size: 28px;
}
.image_intro{
    padding: 60px;
    text-align: center;
    font-size: 36px;
}
.image_intro_image{
    width: 260px;
    height: 260px;
}