/*超大屏幕*/
@media screen and (min-width: 1900px) {
    .page_bg {
        height: 600px;
        background-size: 100% 600px;
    }
}

/*大屏幕*/
@media screen and (min-width: 769px) {
    .page_bg {
        height: 450px;
        background-size: 100% 450px;
    }

    .div_intro_1 {
        width: 90%;
        margin: 60px auto;
    }

    .div_intro_1 .div_detail {
        margin-bottom: 50px;
    }

    .div_title a {
        color: #00269a;
        font-size: 18px;
    }

    .div_title a:hover {
        color: #00269a;
    }

    .div_title a span {
        margin-left: 8px;
        font-weight: bold;
    }

    .page {
        margin-top: 18px;
    }
}