img {
    width: 100%
}

.contentbox {
    width: 1100px;
    margin: 30px auto 0;
    background: #fff;
    padding: 50px;
    min-height: 500px
}

.contentbox>.title {
    color: #0172ff;
    font-weight: 700;
    font-size: 28px;
    text-align: center
}

.contentbox>.brief {
    margin-top: 20px;
    text-align: center
}

.contentbox>.content {
    margin: 30px 50px;
    line-height: 30px;
    font-size: 14px
}

.contentbox>.content img {
    width: 100%!important
}