.Banner {
    min-width: 1200px;
    overflow: hidden;
    float: none;
}
.about_text {
    position: absolute;
    left: 50%;
    top: 50%;
    transform: translate(-50%, -50%);
}
.main {
    overflow: hidden;
    width: 100%;
    height: 645px;
    min-width: 1200px;
    background-image: url('../img/about_mianbg.png');
    background-position: 0 100%;
    background-size: auto;
    background-repeat: no-repeat;
}
.main h2 {
    margin-top: 80px;
    font-size: 50px;
    font-weight: 600;
    line-height: 1.8;
    background-image: url('../img/about_line.png');
    background-position: 0 82%;
    background-size: auto;
    background-repeat: no-repeat;
    margin-bottom: 45px;
}
.left_box {
    float: left;
    width: 600px;
}
.left_box p {
    font-size: 20px;
}
.left_box p + p {
    margin-top: 25px;
}
.main img {
    margin-top: 59px;
    float: right;
}