.btn-bock {
    width: 100%;
    display: flex;
    justify-content: center;
    position: absolute;
    bottom: 62px;
  }
  
  .banner-btn {
    width: 176px;
    height: 64px;
    border: 1px solid #ffffff;
    background: rgba(255, 255, 255, 0);
    border-radius: 12px;
    /* opacity: 0.31; */
    text-align: center;
    line-height: 64px;
    color: #fff;
    cursor: pointer;
    margin: 0 20px;
  }
  
  .banner-btn:hover {
    background: #fff;
    color: #000;
  }
  
  .banner-title1 {
    font-family: PingFangSC, PingFang SC;
    font-weight: 600;
    font-size: 80px;
    color: #ffffff;
    line-height: 88px;
    text-align: center;
    font-style: normal;
    position: absolute;
    top: 228px;
    width: 100%;
    text-align: center;
  }
  
  .banner-title2 {
    font-family: PingFangSC, PingFang SC;
    font-weight: 400;
    font-size: 28px;
    color: #ffffff;
    text-align: center;
    font-style: normal;
    top: 416px;
    width: 100%;
    text-align: center;
    position: absolute;
  }
  
  /* .message-block {
    width: 100%;
    height: 600px;
  } */
  
  .message-img {
    width: 100%;
    margin: 0 auto;
    display: block;
    margin-top: 72px;
  }
  
  .work-type-block {
    padding: 80px 0;
    background: #fff;
  }
  .block-info {
    width: 62.5%;
    margin: 0 auto;
  }
  .title {
    font-family: PingFangSC, PingFang SC;
    font-weight: 500;
    font-size: 40px;
    color: #000000;
    line-height: 44px;
    text-align: center;
    font-style: normal;
  }
  .title-des {
    font-family: PingFangSC, PingFang SC;
    font-weight: 400;
    font-size: 16px;
    color: rgba(0, 0, 0, 0.5);
    line-height: 24px;
    text-align: center;
    font-style: normal;
    margin-top: 24px;
  }
  
.oper-container {
    width: 62.5%;
    margin: 0 auto;
    padding-top: 80px;
  }
  .oper-title1 {
    font-family: PingFangSC, PingFang SC;
    font-weight: 500;
    font-size: 40px;
    color: #000000;
    line-height: 44px;
    text-align: center;
    font-style: normal;
  }
  .oper-title2{
    
margin-top: 16px;
font-weight: 400;
font-size: 16px;
color: rgba(0, 0, 0, 0.5);
line-height: 24px;
text-align: center;
font-style: normal;
  }
  .oper-icon {
    width: 120px;
    height: 120px;
  }
  
  .oper-icon-title {
    font-family: PingFangSC, PingFang SC;
    font-weight: 500;
    font-size: 20px;
    color: #000000;
    line-height: 28px;
    text-align: center;
    font-style: normal;
    margin-top: 32px;
  }
  
  .oper-icon-pretitle {
    font-family: PingFangSC, PingFang SC;
    font-weight: 400;
    font-size: 14px;
    color: rgba(0, 0, 0, 0.5);
    line-height: 22px;
    text-align: center;
    font-style: normal;
    margin-top: 12px;
  }
  
  .oper-icon-item {
    display: flex;
    flex-direction: column;
    align-items: center;
    /* padding: 76px 111px 119px; */
    width: 32.5%;
  }
  
  .oper-icon-item1 {
    padding: 0;
  }
  
  .icon-block {
    display: flex;
    justify-content: center;
    margin-top: 72px;
    align-items: center;
  }
  
  .oper-arrow-img {
    width: 152px;
    height: 24px;
    margin-top: -88px;
  }
  
  .oper-container {
    .carousel-container {
      width: 100%;
      margin: 0 auto;
      margin-top: 72px;
      overflow: hidden;
      /* position: relative; */
      padding: 0 15px;
    }
    .carousel-track {
      display: flex;
      justify-content: flex-start;
      transition: transform 0.5s ease;
      gap: 29px; 
      /* padding-left: 15px; */
      flex-wrap: wrap;
   
    }
    .carousel-item {
      min-width: 0; /* 防止内容溢出 */
      height: 344px;
      box-sizing: border-box;
      flex: 0 0 calc(33.3% - 29px); /* 计算方式：(100% - 2*gap)/3 */
    }
    .talk-block {
      width: 100%;
      height: 260px;
      background: url("../images/talk.png") no-repeat;
      background-size: 100% 100%;
      display: flex;
    }
    .dou {
      width: 40px;
      height: 40px;
      margin-top: 14px;
      margin-left: 12px;
    }
  
    .talk-name {
      font-family: PingFangSC, PingFang SC;
      font-weight: 500;
      font-size: 16px;
      color: #000000;
      line-height: 24px;
      font-style: normal;
    }
  
    .talk-info {
      font-family: PingFangSC, PingFang SC;
      font-weight: 400;
      font-size: 14px;
      color: rgba(0, 0, 0, 0.5);
      line-height: 22px;
      text-align: justify;
      font-style: normal;
      padding: 16px 0;
      width: 70%;
      /* margin: 0 auto; */
    }
  
    .talk-city {
      font-family: PingFangSC, PingFang SC;
      font-weight: 400;
      font-size: 14px;
      color: rgba(0, 0, 0, 0.5);
      line-height: 22px;
      font-style: normal;
    }
    /* .carousel-item img {
      width: 100%;
      height: auto;
      border-radius: 4px;
      display: block;
      object-fit: cover;
      padding: 0 1%; 
      box-sizing: border-box;
    } */
    .carousel-dots {
      display: flex;
      justify-content: center;
      margin-top: 72px;
      gap: 8px;
    }
    .carousel-dot {
      width: 40px;
      height: 3px;
      background: #d8d8d8;
      cursor: pointer;
      transition: all 0.3s;
    }
    .carousel-dot.active {
      background: #000;
    }
  }

  
  
  .block1 {
    display: flex;
    align-items: center;
    height: 620px;
  }
  
  .nav3 ul {
    list-style: none;
    background-color: #343434;
    height: 100%;
  }
  .nav3 ul li {
    height: 25%;
    display: flex;
    justify-content: center;
    align-items: center;
    position: relative;
  }
  
  .nav3 ul li a {
    text-decoration: none;
    display: block;
    padding: 20px 67px;
    position: relative;
    font-family: PingFangSC, PingFang SC;
    font-weight: 400;
    transition: all 0.3s;
    position: relative;
  
    font-size: 24px;
    color: #ffffff;
    line-height: 32px;
    text-align: center;
    font-style: normal;
  }
  
  .nav3 li a.active {
    color: #fff;
  }
  .nav3 ul li:has(.active) {
    background-color: red;
  }
  .nav3 ul li:has(.active)::after {
    content: "";
    position: absolute;
    height: calc(154px / sqrt(2));
  
    width: calc(154px / sqrt(2));
    right: -55px;
    top: 22px;
    background: red;
    transform: rotate(45deg);
    transform-origin: center; /* 从中心缩放 */
    z-index: 999;
  }
  .title-pre {
    font-family: PingFangSC, PingFang SC;
    font-weight: 400;
    font-style: normal;
    margin-top: 12px;
    font-size: 14px;
    color: #ffffff;
    line-height: 22px;
    text-align: center;
    font-style: normal;
    display: -webkit-box;
    -webkit-box-orient: vertical;
    -webkit-line-clamp: 2; /* 限制在一个块元素显示的文本的行数 */
    overflow: hidden;
    text-overflow: ellipsis;
  }
  
  .block2 {
    width: 79.2%;
    /* height: 558px; */
    /* background: #000000; */
    /* flex-grow: 1; */
  }
  
  .content {
    display: none;
    animation: fadeIn 0.5s ease;
    height: 620px;
    background: #000;
  }
  
  .content.active {
    display: block;
  }
  
  .content img {
    display: block;
    width: 100%;
    height: 100%;
  }
  /* 淡入动画 */
  @keyframes fadeIn {
    from {
      opacity: 0;
    }
    to {
      opacity: 1;
    }
  }
  .swiperbox1 {
    width: 100%;
    padding: 80px 0;
    background: #f9f9f9;
  }
  .swiperbox1 .container {
    width: 64.5%;
    overflow: hidden;
    position: relative;
  }
  .swiperbox1 .swiper-container {
    height: 400px;
  }
  .swiperbox1 .swiper-ul {
    display: flex;
    width: 100%;
    height: 100%;
    justify-content: center;
    align-items: center;
  }
  .swiperbox1 .swiper-ul .swiper-li {
    width: 30.8%;
    height: 282px;
    background: #ffffff;
    box-shadow: 0px 8px 30px 0px rgba(133, 133, 133, 0.2);
    margin: 0 22px;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    box-sizing: border-box;
    padding: 40px;
  }
  .swiperbox2 {
    width: 100%;
    padding: 80px 0;
    background-image: url("../images/machinery1.png");
    background-size: 100% 100%;
    color: #fff;
  }
  .swiperbox2 .container {
    width: 62.5%;
    overflow: hidden;
    position: relative;
  }
  .swiperbox2 .swiper-ul {
    display: flex;
    width: 90%;
    height: 100%;
    justify-content: center;
    align-items: center;
  }
  .swiperbox2 .swiper-ul .swiper-li {
    width: 30%;
    height: 462px;
    background: #ffffff;
    box-shadow: 0px 8px 30px 0px rgba(133, 133, 133, 0.2);
    margin: 0 22px;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    box-sizing: border-box;
    padding: 40px;
  }
  .swiperbox2 .container .title {
    color: #fff;
  }
  .swiperbox2 .swiper-container {
    /* height: 400px; */
  }
  .swiper-wrapper .swiper-slide {
    display: flex;
    justify-content: center;
    align-items: center;
  }
  .block3 {
    padding: 80px 0;
    background: #f9f9f9;
  }
  
  .title1 {
    font-family: PingFangSC, PingFang SC;
    font-weight: 500;
    font-size: 40px;
    color: #000000;
    line-height: 44px;
    text-align: center;
    font-style: normal;
  }
  
  .title1-des {
    font-family: PingFangSC, PingFang SC;
    font-weight: 400;
    font-size: 16px;
    color: rgba(0, 0, 0, 0.5);
    line-height: 24px;
    text-align: center;
    font-style: normal;
    margin-top: 24px;
  }
  
  .carousel-container {
    width: 62.5%;
    margin: 0 auto;
    margin-top: 72px;
    overflow: hidden;
    position: relative;
    /* padding: 0 15px; */
  }
  
  .video-btn {
    position: absolute;
    width: 104px;
    height: 104px;
    z-index: 100;
    left: 0;
    right: 0;
    margin: 0 auto;
    top: 258px;
    cursor: pointer;
  }
  
  .carousel-track {
    display: flex;
    justify-content: space-between;
    transition: transform 0.5s ease;
    gap: 0px; /* 新增间隙 */
    padding-left: 15px; /* 初始偏移补偿 */
  }
  
  .carousel-item {
    min-width: 0;
    height: 620px;
    /* background: #000; */
    box-sizing: border-box;
    flex: 0 0 calc(100%);
    /* 计算方式：(100% - 2*gap)/3 */
  }
  
  .carousel-item video {
    width: 100%;
    display: block;
    object-fit: cover; /* 保持图片比例 */
    box-sizing: border-box;
  }
  
  .hidden {
    display: none;
  }
  
  .show {
    display: block;
  }
  
  .carousel-dots {
    display: flex;
    justify-content: center;
    margin-top: 72px;
    gap: 8px;
  }
  
  .carousel-dot {
    width: 80px;
    height: 3px;
    background: #d8d8d8;
    cursor: pointer;
    transition: all 0.3s;
  }
  
  .carousel-dot.active {
    background: #000;
  }
  
  .block5 {
    width: 62.5%;
    margin: 0 auto;
    padding: 80px 0;
    background: #fff;
  }
  
  .block6 {
    /* width: 62.5%; */
    margin: 0 auto;
    display: flex;
    justify-content: center;
    margin-top: 80px;
  }
  
  .block6-item {
    width: 32.5%;
    height: 396px;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
  }
  
  .title2 {
    font-family: PingFangSC, PingFang SC;
    font-weight: 500;
    font-size: 40px;
    color: #000000;
    line-height: 44px;
    text-align: center;
    font-style: normal;
  }
  
  .home-icon {
    width: 120px;
    height: 120px;
  }
  
  .icon-title {
    font-family: PingFangSC, PingFang SC;
    font-weight: 500;
    font-size: 20px;
    color: #000000;
    line-height: 28px;
    text-align: center;
    font-style: normal;
    margin-top: 32px;
  }
  
  .icon-title-des {
    font-family: PingFangSC, PingFang SC;
    font-weight: 400;
    font-size: 14px;
    color: rgba(0, 0, 0, 0.5);
    line-height: 22px;
    text-align: center;
    font-style: normal;
    margin-top: 12px;
  }
  
  .range-block {
    width: 62.5%;
    margin: 0 auto;
    padding: 80px 0;
  }
  
  .range-info {
    width: 100%;
    /* height: 620px; */
    /* background: #000000; */
    margin: 80px auto 0;
  }
  
  .contact-block {
    width: 62.5%;
    margin: 0 auto;
    padding: 80px 0;
    background: #fff;
  }
  
  .custom-select {
    appearance: none;
    -webkit-appearance: none;
    -moz-appearance: none;
    background-image: url('data:image/svg+xml;utf8,<svg fill="black" height="24" viewBox="0 0 24 24" width="24" xmlns="http://www.w3.org/2000/svg"><path d="M7 10l5 5 5-5z"/></svg>');
    background-repeat: no-repeat;
    background-position: right 10px center; /* 改为左侧 */
    padding-left: 30px; /* 为左侧箭头留出空间 */
    padding-right: 10px;
    border: 1px solid #ccc;
    border-radius: 4px;
    padding: 8px 16px;
    font-size: 16px;
    width: 200px;
  }
  
  .machinery-banner {
    height: 520px;
    background: url(../images/workService-banner.png) no-repeat center;
    background-size: cover;
    margin-top: 100px;
  }
  .banner-big-title {
    font-family: PingFangSC, PingFang SC;
    font-weight: 600;
    font-size: 48px;
    color: #ffffff;
    line-height: 56px;
    text-align: left;
    font-style: normal;
    position: absolute;
    top: 146px;
  }
  
  .banner-pre-title {
    font-family: PingFangSC, PingFang SC;
    font-weight: 400;
    font-size: 18px;
    color: #ffffff;
    line-height: 26px;
    text-align: left;
    font-style: normal;
    position: absolute;
    width: 37.3%;
    top: 242px;
  }
  
  @media (max-width: 1920px) {
    .banner-pre-title {
      width: 70%;
    }
  }
  
  .banner-center {
    width: 62.5%;
    height: 520px;
    margin: 0 auto;
    position: relative;
  }
  .down-btn {
    position: absolute;
    top: 357px;
    width: 232px;
    height: 75px;
    background: rgba(255, 255, 255, 0);
    border-radius: 3px;
    color: #fff;
    font-size: 24px;
    border-color: #fff;
    cursor: pointer;
  }
  
  /* .down-btn:hover {
        background-color: red;
        transform: translateY(-2px);
        box-shadow: 0 4px 8px rgba(0, 0, 0, 0.15);
      } */
  
  .down-code-block {
    width: 154px;
    height: 154px;
    background: #ffffff;
    border-radius: 12px;
    padding: 10px;
    position: absolute;
    left: 268px;
    top: 330px;
    opacity: 0;
    visibility: hidden;
    transition: all 0.5s cubic-bezier(0.68, -0.55, 0.27, 1.55);
    z-index: 10;
  }
  
  .show {
    opacity: 1;
    visibility: visible;
    transform: translateX(-5%) translateY(0);
  }
  
  /* 悬停效果 */
  .down-btn:hover .down-code-block {
    opacity: 1;
    visibility: visible;
    /* transform: translateX(-50%) translateY(0); */
  }
  
  #danmu-container {
    position: relative;
    width: 100%;
    height: 368px;
    /* background-color: #000; */
    overflow: hidden;
    margin-bottom: 36px;
    border-radius: 5px;
    margin-top: 72px;
  }
  
  .danmu {
    position: absolute;
    white-space: nowrap;
    font-size: 16px;
    /* text-shadow: 1px 1px 2px #000; */
    user-select: none;
    padding: 12px;
    border-radius: 8px;
    display: flex;
    align-items: center;
  }
  
  .avatar {
    width: 40px;
    height: 40px;
    display: inline-block;
    margin-right: 8px;
  }