.main_box::after {
    content: '';
    width: 280px;
}

.img_box {
    width: 280px;
    height: 270px;
    padding-top: 20px;
    text-align: center;
    box-sizing: border-box;
    margin-bottom: 20px;
}

.height_330 {
    height: 380px;
}

.img_box img {
    width: 260px;
    height: 180px;
    border: 1px solid #B9BCBC;
}

.img_box img:hover {
    cursor: url("../imgs/aboutus/rongyao/curror.png"), auto;
    transform: scale(1.1);
}

.img_box p {
    /* width: 150px; */
    line-height: 18px;
    font-size: 16px;
    margin: 0 auto;
}

.main_box {
    margin-top: 20px;
    display: flex;
    justify-content: space-between;
    flex-wrap: wrap;
}

.overlay {
    background: rgba(0, 0, 0, 0.4);
    filter: alpha(opacity=70);
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 10;
}

.overlayimg {
    position: absolute;
    z-index: 11;
    left: 35%;
    top: 20%;
    cursor: pointer;
    max-width: 500px;
    max-height: 500px;
}

.contactus_flex {
    display: flex;
    justify-content: space-between;
    flex-wrap: wrap;
}

.contactus_box {
    width: 280px;
    font-size: 16px;
    color: #5f6464;
    font-family: Microsoft YaHei;
    margin-top: 33px;
}

.contactus_box p {
    margin-bottom: 10px;
}

.contactus_box a {
    display: inline-block;
    vertical-align: middle;
    width: 76px;
    height: 28px;
    line-height: 26px;
    border: 1px solid #b8d9ff;
    background-color: #eff6fe;
    background: linear-gradient(180deg, #fff 0, #eff6fe 100%);
    border-radius: 50px;
    box-sizing: border-box;
    text-decoration: none;
    text-align: center;
    font-size: 13px;
    font-family: Microsoft YaHei;
    font-weight: 400;
    color: #0076fe;
}

.contactus_box a:hover {
    border-color: #0076fe;
    background: #0076fe;
    color: #fff;
}

.img_div_box {
    float: right;
    width: 400px;
    height: 280px;
    background: url("../imgs/aboutus/bg-sylg.png");
    background-size: 400px, 280px;
    border-radius: 10px;
    margin-top: 20px;
}

.img_flex {
    display: flex;
    justify-content: space-between;
    flex-wrap: wrap;
    margin-top: 30px;
}

.img_box_1 {
    width: 200px;

}

.img_box_1 img {
    width: 200px;
    height: 200px;
    border: 1px solid #DEE3E8;
}

.img_box_1 p {
    text-align: center;
    font-size: 16px;
}

li {
    list-style: none;
}

a {
    text-decoration: none;
}

.body_class {
    width: 1200px;
    margin: 0 auto;
    font-size: 16px;
    line-height: 24px;
    background: white;
    padding: 20px;
    margin-top: 20px;
    margin-bottom: 20px;
}

footer {
    width: 100%;
    color: #fff;
    background-color: #284A79;
    padding: 50px 0 20px 0;
    font-family: "微软雅黑", "黑体";
    text-align: left;

}

footer .inner {
    width: 1200px;
    margin: 0 auto;
}

footer .logo-wrap {
    font-size: 12px;
    margin-left: 220px;
    text-align: center;
}

footer .inner .line {
    width: 1px;
    height: 154px;
    margin: 0 50px 0 60px;
    background-color: #fff;
}

.flex {
    display: flex;
}

footer a {
    color: white;
    font-size: 18px;
}

footer p {
    font-size: 16px;
    margin-bottom: 15px;
}

.hidebody {
    position: relative;
}

nav a {
    font-size: 20px;
    color: #555;
    font-family: "微软雅黑", "黑体";
}

nav a:hover {
    color: #3269AB;
}

.hideitm {
    border-radius: 15px;
    position: absolute;
    display: flex;
    flex-direction: column;
    text-align: center;
    top: -20px;
    left: -20px;
    width: 120px;
    display: none;
    z-index: 100;
    background: #F7F7F7;
}

.hideitm div {
    padding: 10px 10px;
    overflow: hidden;
}

.top {
    margin-bottom: 15px;
}

.hideitm a {
    display: block;
    padding: 10px 10px;
    border-radius: 23px;
}

.hideitm a:hover {
    background: #3269AB;
    color: #fff;
}

.hidebody:hover .hideitm {
    transition: 0.5s all;
    display: block;
}

.logo {
    margin-right: 30px;
}

.nav-wrap .logo {
    width: 248px;
    height: 43px;
}

.nav-item {
    margin-left: 35px;
}

.nav-item {
    font-size: 19px;
}

.flex-sb-ac {
    display: flex;
    align-items: center;
    justify-content: space-between;
}

nav {
    background: white;
}

.nav-wrap {
    width: 1200px;
    margin: 0 auto;
    height: 94px;
    font-size: 16px;
    position: relative;
}

.logoFont {
    font-size: 36px;
    user-select: none;
    font-weight: 400;
    color: #1f4a7d;
    font-family: "Source Han Sans CN";
    font-weight: bold;
}

.loginBox {
    width: 105px;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.bander_image {
    width: 100%;
    height: 290px;
    background: url(../imgs/aboutus/bander_image.png);
    background-size: 100%, 100%;
    background-repeat: no-repeat;
}

.h2_title {
    width: 100%;
    text-align: center;
    margin-bottom: 30px;
}