.box {
    width: 90%;
    margin-top: 20px;
    text-align: center;
    margin: auto;
}
.box .top {
    height: 100px;
    line-height: 100px;
    font-size: 25px;
    font-weight: 700;
}
.box .bottom_img {
    width: 100%;
}
.box .bottom_img img {
    width: 100%;
}


.btm {
    margin-top: 100px;
    position: absolute;
    bottom: 0;
    width: 100%;
}