@font-face {
    font-family: "pf";

    src:
        local("PingFang Regular"),
        local("PingFangSC-Regular"),
        local("PingFang Regular"),
        url("./pf.ttf") format("truetype");
}
@font-face {
    font-family: "pfm";

    src:
        local("PingFang Medium"),
        local("PingFangSC-Medium"),
        local("PingFangSC Medium"),
        url("./pfm.TTF") format("truetype");
}
@font-face {
    font-family: "pfb";

    src:
        local("PingFang Bold"),
        local("PingFangSC-Bold"),
        local("PingFangSC Bold"),
        url("./pfb.TTF") format("truetype");
}

@font-face {
    font-family: "pfh";

    src:
        local("PingFang Heavy"),
        local("PingFangSC-Heavy"),
        local("PingFangSC Heavy"),
        url("./pfh.ttf") format("truetype");
}
.pfm {
    font-family: "pfm", sans-serif;
}
.pfb {
    font-family: "pfb", sans-serif;
}
.pfh {
    font-family: "pfh", sans-serif;
}
body {
    width: 100%;
}
.aida {
    font-family: "pf", sans-serif;
    max-width: 1920px;
    min-width: 1400px;
    margin: auto;
}
.header h1{
    margin: 0 240px 0 0;
}
.header h1 img {
    width: auto;
    height: 40px;
}
.header {
    display: flex;
    justify-content: center;
    align-items: center;
    width: 100%;
    height: 80px;
    background: #070918;
}
.header ul {
    display: flex;
    height: 100%;
}
.header ul li {
    height: 100%;
    padding: 0 34px;
    margin-right: 2px;
    color: white;
    border-bottom: 8px solid transparent;
    box-sizing: border-box;
}
.header ul li:hover {
    color: #ffce1a;
    border-bottom: 8px solid #ffce1a;
}
.header ul li.active {
    color: #ffce1a;
    border-bottom: 8px solid #ffce1a;
}
.header ul li a {
    font-weight: bold;
    font-size: 16px;
    color: inherit;
    line-height: 80px;
}

.banner{
    width: 100%;
    height: 300px;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-direction: column;
    background: rgba(51,51,51,0.4);
    border-radius: 2px 2px 2px 2px;
    background: url(./img/banner_2.png) center/auto 100% no-repeat;
}
.banner h2{
    font-weight: 600;
    font-size: 40px;
    color: #FFFFFF;
    line-height: 60px;
}
.banner p{
    margin-top: 16px;
    font-size: 16px;
    color: #FFFFFF;
    line-height: 24px;
}
.main{
    min-height: calc(100vh - 570px);
    padding: 60px 0 20px;
    background: #FFFFFF;
    max-width: 1280px;
    box-sizing: border-box;
    margin: auto;

}
.main .title{
    font-weight: 400;
    font-size: 16px;
    color: #666666;
    line-height:40px;
    text-align: left;
}
.main .title .span{
    display: inline-block;
    width: 16px;
    height: 16px;
    margin: 0 6px;
    vertical-align: middle;
    background: url(./img/next.png) center/100% 100% no-repeat;
}
.main .title a{
    color: inherit;
}

.main .list{
   margin-top: 40px;
}
.product_bg {
  display: flex;
  justify-content: space-between; /* 水平间隔 */
  min-height: calc(100vh - 570px);
}

.product_desc, .product_video {
  flex: 1; /* 确保两个子元素宽度相等 */
  padding: 20px;
  box-sizing: border-box;
}

.product_desc {
  background-color: #FFFFFF; /* 左边简介背景颜色 */
}

.product_video {
  background-color: #FFFFFF; /* 右边视频背景颜色 */
}
.bottom .copyright {
    height: 190px;
    text-align: center;
    background: #070918;
}
.bottom .copyright img {
    width: 140px;
    height: 69px;
    margin: 44px auto 16px;
}
.bottom .copyright p {
    font-weight: 400;
    font-size: 16px;
    color: #ffffff;
    line-height: 24px;
}