*{
    margin: 0;
    padding: 0;
}

ul,li{
    list-style: none;
}

a{
    text-decoration: none;
}

.header{
    height: 80px;
}
@media (min-width: 915px) {
.heart{
    width: 1310px;
    height: 100%;
    margin: 0 auto;
}
}


/* 针对手机等小屏幕设备的媒体查询 */
@media (max-width: 767px) {
    .heart {
        width: auto; /* 或者设置为具体的像素值，比如'100%'以匹配父元素的宽度 */
        height: auto; /* 根据需要调整 */
        margin: inherit; /* 或者其他的值，依据具体需求 */
    }
}


.header .logo{
    float: left;
    margin-top: 19px;
}

.header .contact_us{
    float: right;
    display: flex;
    margin-top: 29px;
}

.header .contact_us img{
    margin-right: 10px;
}

.bannerList .list{
    display: flex;
    align-items: center;
}

.bannerList .list>li{
    margin-right: 160px;
}

.bannerList .list>li>a{
    font-size: 16px;
    font-weight: 400;
    color: #333333;
    line-height: 7px;
}

.bannerList .list .list_selecte{
    position: relative;
}

.bannerList .list .list_selecte>.a{
    display: inline-block;
    width: 200px;
    height: 40px;
    text-align: center;
    line-height: 40px;
    font-size: 16px;
    font-weight: 300;
    color: #FFFFFF;
    background: #347EDE;
    border-radius: 15px 15px 0px 0px;
}

.bannerList .list .list_selecte .triangle{
    display: inline-block;
    width: 0;
    height: 0;
    border: 5px solid #FFFFFF;
    border-bottom-color: transparent;
    border-left-color: transparent;
    border-right-color: transparent;
}

.banner{
    width: 100%;
    height: 500px;
}

.banner img{
    width: 100%;
    height: 100%;
}

.bannerList .hidden_list{
    position: absolute;
    display: flex;
    flex-direction: column;
    justify-content: space-evenly;
    width: 200px;
    z-index: 1;
    height: 500px;
    background-color: rgba(0,0,0,0.1);
}

.bannerList .hidden_list li{
    width: 160px;
    margin-right: 0;
    margin-left: 20px;
    text-align: left;
    border-bottom: 1px solid #EEEEEE;
    line-height: 25px;
}

.bannerList .hidden_list li:last-child{
    border-bottom: none;
}

.bannerList .hidden_list li a{
    font-size: 16px;
    color: #FFFFFF;
}

.banner_bottom_list{
    display: flex;
    justify-content: space-around;
    height: 80px;
    box-shadow: 0px 6px 8px 0px rgba(16,5,0,0.08);
}

.banner_bottom_list li{
    display: flex;
    text-align: center;
}

.banner_bottom_list div{
    float: left;
    margin: auto 0;
}

.banner_bottom_list img{
    float: left;
    width: 50px;
    height: 50px;
    margin: 10px 5px 0 0;
}

.course_main{
    width: 100%;
    /*height: 700px;*/
    overflow: hidden;
}

.sign{
    width: 369px;
    height: 90px;
    margin: 54px auto 0;
    text-align: center;
}

.sign .title{
    font-family: Source Han Sans CN;
    font-weight: 500;
    font-size: 34px;
    color: var(--text-color-darker);
}

.sign .title .font_black{
    color: #333333;
}

.sign .page{
    margin-top: 14px;
    font-size: 20px;
    font-family: Source Han Sans CN;
    font-weight: 400;
    color: #888888;
}

.course_list{
    display: flex;
    flex-wrap: wrap;
    justify-content: space-evenly;
}

.course_list li{
    margin-bottom: 80px;
}

.course_list .course_list_box{
    position: relative;
}

.course_list .course_list_box .pages{
    margin-top: 26px;
}

.course_list .course_list_box span{
    display: inline-block;
    width: 12px;
    height: 12px;
    background: #347EDE;
}

.course_list .course_list_box .postion_box{
    position: absolute;
    right: -20px;
    bottom: 50px;
    width: 100px;
    height: 40px;
    background: #347EDE;
    font-size: 20px;
    font-family: Source Han Sans CN;
    font-weight: 400;
    color: #F5F7FA;
    text-align: center;
    line-height: 40px;
}

.major{
    overflow: hidden;
    height: 700px;
    background: #F5F7F9;
}

.major .major_list_box{
    max-width: 288px;
    min-height: 264px;
    background: #FFFFFF;
    box-shadow: 0px 5px 10px 0px rgba(16,5,0,0.1);
    border-radius: 10px;
padding-bottom: 20px;
}

.major .major_list{
    display: flex;
    flex-wrap: wrap;
    justify-content: space-around;
    align-content: stretch;
    align-items: center;
}

.major .major_list li{
    margin-bottom: 25px;
}

.major .major_list .major_box_title{
    margin: 10px 18px 10px 18px;
    font-size: 16px;
    font-family: Source Han Sans CN;
    font-weight: 400;
    color: #333333;
}

.major .major_list .major_box_page{
    margin:0 18px;
    font-size: 14px;
    font-family: Source Han Sans CN;
    font-weight: 300;
    color: #666666;
}

.introduce{
    overflow: hidden;
    height: 720px;
    background: url("img/ycsj_bg.png") no-repeat;
    background-size:100% 100%;
}

.introduce .introduce_main{
    text-align: center;
}

.technology{
    overflow: hidden;
    height: 700px;
    background: #F7F8FA;
}

.technology .product {
    display: flex;
    justify-content: space-evenly;
    margin-top: 43px;
}

.technology .product .product_list{
    position: relative;
    width: 296px;
    height: 56px;
    background: #FFFFFF;
    border-radius: 6px;
    font-size: 16px;
    font-family: Source Han Sans CN;
    font-weight: 400;
    color: #666666;
    text-align: center;
    line-height: 56px;
}

.technology .product_list span{
    position: absolute;
    bottom: 0;
    transform: translate(-50%,100%);
    left: 50%;
    display: inline-block;
    border: 10px solid #FFFFFF;
    border-bottom-color: transparent;
    border-left-color: transparent;
    border-right-color: transparent;
}

.technology .product .hover_product{
    background: #347EDE;
    color: #FFFFFF;
}

.technology .product .hover_span{
    border: 10px solid #347EDE;
    border-bottom-color: transparent;
    border-left-color: transparent;
    border-right-color: transparent;
}

.technology .message{
    width: 800px;
    margin: 89px auto 0;
}

.technology .product_presentation{
    display: flex;
    flex-wrap: wrap;
    flex-direction: row;
    justify-content: space-between
}

.technology .product_presentation li{
    display: flex;
    margin-bottom: 61px;
}

.technology .product_message{
    text-align: left;
}

.technology .product_message .product_page{
    width: 211px;
    font-size: 14px;
    font-family: Source Han Sans CN;
    font-weight: 400;
    color: #666666;
}

.technology .product_message .product_title{
    font-size: 18px;
    font-family: Source Han Sans CN;
    font-weight: 400;
    color: #333333;
}

.technology .product_message .product_page_logo{
    display: inline-block;
    margin: 19px 10px 0 0;
    width: 10px;
    height: 10px;
    background: #347EDE;
    border-radius: 50%;
}

.certificate{
    overflow: hidden;
    height: 500px;
    background: #ECECED;
}

.certificate_main_box{
    display: flex;
    margin-top: 44px;
    justify-content: center;
}

.certificate .certificate_message{
    margin-left: 34px;
}

.certificate .certificate_main_box .certificate_message_title{
    width: 406px;
    height: 59px;
    border-bottom: 2px solid #347EDE;
    font-size: 24px;
    font-family: Source Han Sans CN;
    font-weight: 400;
    color: #0962FF;
}

.certificate .certificate_main_box .certificate_message_page{
    margin-top: 32px;
    width: 272px;
    height: 50px;
    font-size: 18px;
    font-family: Source Han Sans CN;
    font-weight: 300;
    color: #666666;
}

.footer{
    height: 70px;
    background: #000000;
    font-size: 12px;
    font-family: Source Han Sans CN;
    font-weight: 300;
    color: #FFFFFF;
}
.footer .footer_list{
    display: flex;
    height: 100%;
    justify-content: center;
    align-items: center;
}