.application-area {
    padding: 20px 0 20px;

    background: url(../../切图/2-关于我们/组84.jpg) no-repeat center center;
    background-size: cover;
}
.out-tw {
    width: 100%;

    background-color: white;
    font-size: 12px;
    color: #333;
    display: block;
    height: 150px;
   padding: 5px;
    opacity: 0.7;
}
.about_introduce {
    margin-top: 20px;
}
.footer {
    margin-top: 20px;
}