/*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;
    }

    .detail_container, .div_intro_1, .div_intro_2 {
        margin-top:80px;
    }
    
    .photo_list {
        width: 100%;
        text-align: center;
    }

    .photo_list .div_img {
        margin-top: 60px;
    }

    .div_intro_1 .div_strategy {
        margin-bottom: 60px;
        letter-spacing: 2px;
    }

    .div_intro_1 .div_strategy .div_title {
        font-size: 20px;
        color: #00269a;
        font-weight: bold;
    }

    .div_intro_1 .div_strategy .div_sub_title {
        font-size: 16px;
        color: #00269a;
        margin-top: 10px;
    }

    .div_intro_1 .div_strategy .div_hr {
        width: 50%;
    }

    .div_intro_1 .div_strategy .div_hr hr {
        background-color: #00269a;
        border: none;
        height: 1px;
        opacity: .8;
    }  
}