.banner {
    position: relative;
    width: 100%;
    height: 430px;
    overflow: hidden;
}
.banner img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}
.banner .mask{
    position: absolute;
    top: 0;
    left: 0;
    height: 100%;
    width: 100%;
}
.banner .mask .w {
    height: 100%;
    display: flex;
    flex-direction: column;
    justify-content: center;
}
.banner .mask h2 {
    color: #fff;
    font-size: 36px;
    font-weight: normal;
}
.banner .mask h4 {
    margin-top: 20px;
    font-size: 30px;
    color: #fff;
}
/* 历史 */
.historynav {
    padding: 20px 0;
    height: auto;
    border-bottom: 1px solid #F1F2F4;   
}
.historynav .w {
    height: 100%;
    display: flex;
    flex-wrap: wrap;
    align-items: center;
}
.historynav a {
    font-size: 16px;
    color: #666666;
    line-height: 30px;
}
.historynav  span {
    margin: 0 5px;  
}
.historynav a span {
    font-size: 18px;
}
.historynav a:hover {
    color: #C20A0A;
}

.zhintro {
    padding-top: 54px;
    padding-bottom: 100px;
}
.zhintro h2 {
    font-size: 40px;
    font-weight: bold;
    color: #000;
    line-height: 44px;
    text-align: center;
    margin-bottom: 50px;
}
.zhintro p {
    font-size: 24px;
    color: #4C4C4C;
    line-height: 44px;
    text-align: center;
}
.xysection {
    background-image: url(../images/zhxybg.png);
    background-size: cover;
    background-repeat: no-repeat;
    background-position: center;
    padding: 75px 0;
}
.xysection h4 {
    height: 78px;
    padding: 0 40px;
    line-height: 68px;
    background-image: url(../images/zhxytitbg.png);
    background-size: contain;
    background-position: center;
    background-repeat: no-repeat;
    text-align: center;
    font-size: 34px;
    font-weight: bold;
    color: #fff;
}   

.grid-container {
    display: grid;
    grid-template-columns: 1fr 1fr; /* 定义两列 */  
    grid-template-rows: 250px;
    gap: 40px; /* CSS Grid Layout 2021 (新语法) */  
    margin-top: 35px;
}
.grid-item {
    display: flex;
    align-items: center;
    background-color: #fff;
    box-shadow: 0px 0px 24px 0px rgba(228,228,228,0.9);
    padding: 0 60px;
}
.grid-item .pic {
    width: 70px;
    height: 70px;
    margin-right: 45px;
    overflow: hidden;
}
.grid-item .pic img {
    width: 100%;
    height: 100%;
    object-fit: contain;
}
.grid-item .cont {
    flex: 1;
}
.grid-item .cont h6 {
    font-size: 28px;
    font-weight: bold;
    color: #1A1A1A;
    line-height: 44px;
}
.grid-item .cont p {
    font-size: 22px;
    line-height: 30px;
    color: #4D4D4D;
}

.picSeciton {
    position: relative;
    margin-top: 45px;
    width: 100%;
    height: auto;
}
.picSeciton img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}
.picSeciton .tit {
    position: absolute;
    left: 0;
    top: 0;
    width: 40px;
    background-color: #CA101A;
    text-align: center;
    border-radius: 20px;
    padding: 10px 0;
    color: #fff;
    font-size: 22px;
    line-height: 24px;
}
.picSeciton .tit::after {
    content: '';
    position: absolute;
    bottom: -10px;
    left: calc(50% - 4px);
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background-color: #CA101A;
    border: 3px solid #000;
}
.picSeciton .tit:hover {
    background-color: #fff;
    box-shadow: 0px 0px 13px 0px #2A2A2A;
    color: #CA101A;
}

.picSeciton .tit:nth-of-type(1){
    left: 135px;
    top: 190px;
}
.picSeciton .tit:nth-of-type(2){
    left: 350px;
    top: 70px;
}
.picSeciton .tit:nth-of-type(3){
    left: 566px;
    top: 20px;
}
.picSeciton .tit:nth-of-type(4) {
    left: 258px;
    top: 421px;
}
.picSeciton .tit:nth-of-type(5) {
    left: 516px;
    top: 543px;
}
.picSeciton .tit:nth-of-type(6) {
    left: 506px;
    top: 197px;
}
.picSeciton .tit:nth-of-type(7) {
    left: 704px;
    top: 272px;
}
.picSeciton .tit:nth-of-type(8) {
    left: 747px;
    top: 143px;
}
.picSeciton .tit:nth-of-type(9) {
    left: 932px;
    top: 368px;
}
.picSeciton .tit:nth-of-type(10) {
    left: 913px;
    top: 490px;
}
.picSeciton .tit:nth-of-type(11) {
    left: 958px;
    top: 35px;
}
.picSeciton .tit:nth-of-type(12) {
    left: 1120px;
    top: 165px;
}
.xypic {
    display: none;
    width: 100%;
    height: auto;
    overflow: hidden;
}
.xypic img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: all 1.0s;
}
.xypic:hover  img{

    transform: scale(1.5);
}
.xysection h5 {
    font-size: 34px;
    line-height: 44px;
    text-align: center;
    margin-bottom: 45px;
}


@media only screen and (max-width: 768px) {
    .banner {height: 250px;}
    .banner .mask h2 {font-size: 18px;}
    .banner .mask h4 {font-size: 15px;margin-top: 10px;}
    .historynav {padding: 15px 0;}

    .zhintro {padding-top: 27px;padding-bottom: 50px;}
    .zhintro h2 {font-size: 20px;margin-bottom: 25px;}
    .zhintro p {font-size: 12px;line-height: 24px;}

    .xysection {padding: 32.5px 0;}
    .xysection h4 {height: 36px;font-size: 16px;line-height: 30px;}
    .grid-container {margin-top: 15px;gap: 15px;grid-template-columns:auto;grid-template-rows:180px 180px;}
    .grid-item {padding: 0 15px;}
    .grid-item .pic {width: 35px;height: 35px;margin-right: 15px;}
    .grid-item .cont h6 {font-size: 14px;line-height: 28px;}
    .grid-item .cont p {font-size: 12px;line-height: 24px;}


    .xysection h5 { font-size: 16px;line-height: 26px;}

}

@media only screen and (min-width: 768px) and (max-width: 1200px) {
    .picSeciton {
        display: none;
    }
    .xypic {display: block;}

    .grid-container {grid-template-columns:auto;grid-template-rows:250px 250px;}


}