*{margin:0;padding:0;box-sizing:border-box;}
body{
    font-family:"微软雅黑",sans-serif;
    color:#333;
    background:#f4f6f8;
    /*background-image:url("https://images.unsplash.com/photo-1584622650111-993a426fbf0a?auto=format&fit=crop&w=1920&q=80");*/
    background-attachment:fixed;
    background-size:cover;
    background-position:center;
    background-repeat:no-repeat;
}
a{text-decoration:none;color:#333;}
ul{list-style:none;}
.container{max-width:1200px;margin:0 auto;padding:0 15px;}
header{
    width:100%;
    background:rgba(255,255,255,0.96);
    backdrop-filter:blur(8px);
    box-shadow:0 2px 14px rgba(0,0,0,0.06);
    position:sticky;
    top:0;
    z-index:999;
    /* 头部留白 */
    padding-top:14px;
    padding-bottom:10px;
}
.nav-wrap{
    display:flex;
    justify-content:space-between;
    align-items:center;
    /*height:70px;*/
    gap:12px;
}
.logo{
    font-size:24px;
    font-weight:bold;
    color:#0066cc;
}
.logo h1 {
    margin: 0;
    padding: 0;
}
.logo img {
    height: 40px;
    display: block;
    width: 93%;
}
.nav-list{display:flex;}
.nav-list li{margin:0 15px;}
.nav-list li a{
    font-size:17px;
    color:#333;
    font-weight:600;
    transition:0.3s;
    padding:8px 4px;
    position:relative;
}
.nav-list li a:hover, .nav-list li a.active{
    color:#0066cc;
}
.nav-list li a.active::after{
    content:"";
    position:absolute;
    left:0;
    bottom:0;
    width:100%;
    height:2px;
    background:#0066cc;
}
/* 头部电话样式 */
.header-tel {
    display: flex;
    align-items: center;
    gap: 6px;
    white-space: nowrap;
}
.header-tel .tel-icon {
    width: 36px;
    height: 36px;
    border-radius: 50%;
    background: #0066cc;
    color: #fff;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: bold;
    font-size: 16px;
}
.header-tel a {
    color: #0066cc;
    font-weight: 700;
    font-size: 17px;
    text-decoration: none;
}
.menu-btn{display:none;font-size:24px;cursor:pointer;}

/* ========== 新版淡入Banner ========== */
.banner {
    width: 100%;
    position: relative;
}

.banner-item {
    width: 100%;
    position: absolute;
    top: 0;
    left: 0;
    opacity: 0;
    transition: opacity 0.8s ease;
}
.banner-item.active {
    opacity: 1;
    z-index: 2;
    position: relative;
}
.banner-bg {
    width: 100%;
    height: auto;
    display: block;
}
.banner-item::after {
    content: "";
    position: absolute;
    inset: 0;
    z-index: 1;
}
.banner-item::before {
    content: "";
    position: absolute;
    inset: 0;
    background:
        radial-gradient(circle at 30% 50%, rgba(255, 255, 255, 0.12), transparent 40%),
        radial-gradient(circle at 70% 60%, rgba(255, 255, 255, 0.08), transparent 35%);
    pointer-events: none;
    z-index: 1;
}
.banner-text {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    z-index: 3;
    text-align: center;
    color: #fff;
    width: 90%;
}
.banner-text h1 {
    font-size: 48px;
    margin-bottom: 15px;
    letter-spacing: 1px;
}
.banner-text p {
    font-size: 18px;
    opacity: 0.92;
}
.banner-dots {
    position: absolute;
    bottom: 24px;
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    gap: 10px;
    z-index: 10;
}
.dot {
    width: 12px;
    height: 12px;
    border-radius: 50%;
    background: rgba(255,255,255,0.45);
    cursor: pointer;
}
.dot.active {
    background: #fff;
}
@media(max-width: 768px) {
    .banner-text h1 {
        font-size: 28px;
    }
    .banner-text p {
        font-size: 16px;
    }
    .banner-dots {
        bottom: 12px;
    }
}

.project-case{
  padding: 60px 0;
}
.title-box{
  text-align:center;
  margin-bottom:30px;
}
.title-box h2{
  font-size:28px;
  color:#222;
}
.case-box{
  position:relative;
  padding:0 40px;
}
.case-scroll{
  display:flex;
  gap:20px;
  overflow-x:auto;
  scroll-behavior:smooth;
  padding:10px 0 20px;
  scrollbar-width:none;
}
.case-scroll::-webkit-scrollbar{
  display:none;
}
.case-card{
  flex:0 0 calc((100% - 40px)/3);
  background:#fff;
  border-radius:12px;
  overflow:hidden;
  box-shadow:0 6px 18px rgba(0,0,0,0.06);
  transition:0.3s;
}
.case-card:hover{
  transform: translateY(-6px);
  box-shadow:0 14px 30px rgba(0,102,204,0.12);
}
.case-card img{
  width:100%;
  height:200px;
  object-fit:cover;
  display:block;
}
.case-text{
  padding:15px;
}
.case-text h4{
  margin:0 0 8px;
  font-size:16px;
  color:#222;
}
.case-text p{
  margin:0;
  font-size:13px;
  color:#999;
}
.case-btn{
  position:absolute;
  top:50%;
  transform: translateY(-50%);
  width:36px;
  height:36px;
  border-radius:50%;
  background:#fff;
  box-shadow:0 2px 8px rgba(0,0,0,0.15);
  border:none;
  color:#0066cc;
  font-size:18px;
  cursor:pointer;
  z-index:2;
}
.prev{
  left:0;
}
.next{
  right:0;
}

@media(min-width:769px) and (max-width:992px){
  .case-card{
    flex:0 0 calc((100% - 20px)/2);
  }
}
@media(max-width:768px){
  .project-case{
    padding:40px 0;
  }
  .case-box{
    padding:0 20px;
  }
  .case-card{
    flex:0 0 calc(100% - 30px);
  }
  .case-btn{
    display:none;
  }
}
.mbanner-single {
    display: none;
}
@media (max-width: 768px) {
    .banner {
        display: none;
    }
    .mbanner-single {
        display: block;
    }
    .mbanner-single img {
        width:100%; display:block;
    }
}
.page-banner{
    width: 100%;
    /*height: 200px;*/
    overflow: hidden;
}
.page-banner img{
    width:100%;
    height:100%;
    object-fit: cover;
    object-position:center;
}
/* ========== Banner结束 ========== */

.section-wrap{padding:60px 0;}
.section-blue{background:rgba(240,246,252,0.92);}
.section-white{background:rgba(255,255,255,0.92);}
.title{
    text-align:center;
    padding-bottom:30px;
    position:relative;
    display:flex;
    justify-content:space-between;
    align-items:center;
}
.title .title-inner{
    flex:1;
    text-align:center;
}
.title h2{font-size:32px;color:#222;margin-bottom:10px;}
.title p{color:#666;}
.title .line{
    width:60px;
    height:3px;
    background:#0066cc;
    margin:10px auto 0;
}
.more-btn{
    color:#0066cc;
    border:1px solid #0066cc;
    padding:6px 16px;
    border-radius:4px;
    transition:0.3s;
}
.more-btn:hover{
    background:#0066cc;
    color:#fff;
}
.product-list{
    display:grid;
    grid-template-columns:repeat(4,1fr);
    gap:20px;
}
.product-item{
    background:#fff;
    border-radius:12px;
    overflow:hidden;
    box-shadow:0 6px 18px rgba(0,0,0,0.06);
    transition:0.3s;
    border:1px solid rgba(0,0,0,0.04);
}
.product-item:hover{transform:translateY(-6px);box-shadow:0 14px 30px rgba(0,102,204,0.12);}
.product-item img{width:100%;height:180px;object-fit:cover;}
.product-item h3{padding:15px;font-size:16px;text-align:center;}
.case-wrap{position:relative;padding:0 40px;}
.case-slide{
    overflow-x:auto;
    scroll-behavior:smooth;
    display:flex;
    gap:20px;
    padding:10px 0 20px;
    scrollbar-width:none;
}
.case-slide::-webkit-scrollbar{display:none;}
.case-item{
    flex:0 0 calc((100% - 40px)/3);
    background:#fff;
    border-radius:12px;
    overflow:hidden;
    box-shadow:0 6px 18px rgba(0,0,0,0.06);
    transition:0.3s;
    border:1px solid rgba(0,0,0,0.04);
}
.case-item:hover{transform:translateY(-6px);box-shadow:0 14px 30px rgba(0,102,204,0.12);}
.case-item img{width:100%;height:200px;object-fit:cover;}
.case-item .case-info{padding:15px;}
.case-item h3{font-size:16px;margin-bottom:8px;}
.case-item .case-date{font-size:13px;color:#999;}
.slide-btn{
    position:absolute;
    top:50%;
    transform:translateY(-50%);
    width:36px;
    height:36px;
    border-radius:50%;
    background:#fff;
    box-shadow:0 2px 8px rgba(0,0,0,0.15);
    border:none;
    cursor:pointer;
    z-index:2;
    font-size:18px;
    color:#0066cc;
}
.slide-prev{left:0;}
.slide-next{right:0;}
.news-box{
    background:#fff;
    padding:30px;
    border-radius:14px;
    box-shadow:0 10px 30px rgba(0,0,0,0.06);
}
.news-item{padding:16px 0;border-bottom:1px dashed #e5e7eb;display:flex;justify-content:space-between;align-items:center;}
.news-item:last-child{border:none;}
.news-item a{color:#333;transition:0.3s;}
.news-item a:hover{color:#0066cc;}
.news-date{color:#999;font-size:14px;}
footer{
    background:
        linear-gradient(180deg, rgba(17,34,51,0.96), rgba(17,34,51,0.92)),
        url("https://images.unsplash.com/photo-1558618666-fcd25c85cd64?auto=format&fit=crop&w=1600&q=80") center/cover no-repeat;
    color:#fff;
    text-align:center;
    padding:50px 0;
}
footer p{line-height:1.9;opacity:0.88;}
.tel-fixed{
    display:none;
    position:fixed;
    bottom:20px;
    left:50%;
    transform:translateX(-50%);
    width:90%;
    max-width:320px;
    background:#0066cc;
    color:#fff;
    text-align:center;
    line-height:46px;
    border-radius:8px;
    font-size:18px;
    font-weight:bold;
    z-index:99;
}
@media(max-width:768px){
    .nav-list{
        position:absolute;
        top:70px;
        left:0;
        width:100%;
        background:#fff;
        flex-direction:column;
        padding:20px 0;
        box-shadow:0 8px 10px rgba(0,0,0,0.08);
        display:none;
    }
    .nav-list li{margin:10px 0;text-align:center;}
    .menu-btn{display:block;}
    .nav-list.active{display:flex;}
    .banner{height:320px;}
    .banner-text h1{font-size:28px;}
    .banner-text p{font-size:16px;}
    .product-list{
        grid-template-columns:1fr;
        justify-items:center;
    }
    .product-item{width:100%;max-width:420px;}
    .case-item{flex:0 0 calc(100% - 30px);}
    .section-wrap{padding:40px 0;}
    .title h2{font-size:24px;}
    .slide-btn{display:none;}
    .tel-fixed{display:block;}
    .header-tel{display:none;}
}
@media(min-width:769px) and (max-width:992px){
    .product-list{grid-template-columns:repeat(2,1fr);}
    .case-item{flex:0 0 calc((100% - 20px)/2);}
}
/* 面包屑导航 */
.breadcrumb{
    font-size:14px;
    color:#666;
    margin:0 0 12px;
}
.breadcrumb a{
    color:#0066cc;
}
.breadcrumb span{
    margin:0 8px;
    color:#666;
}
/* 分页组件 */
.pagination{
    display:flex;
    justify-content:center;
    align-items:center;
    gap:10px;
    margin-top:40px;
}
.pagination a, .pagination span{
    display:block;
    padding:8px 14px;
    border:1px solid #0066cc;
    border-radius:4px;
}
.pagination a{
    color:#0066cc;
}
.pagination .current{
    background:#0066cc;
    color:#fff;
    border-color:#0066cc;
}
.pagination .disabled{
    border-color:#ccc;
    color:#ccc;
    pointer-events:none;
}
/*工程案例列表页三列布局*/
.case-list{
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
}
.case-list .case-item{
    background:#fff;
}
.case-list .case-item img{
    width:100%;
    height:240px;
    object-fit:cover;
}
.case-list .case-item h3{
    padding:12px;
    text-align:center;
    font-size:16px;
}
/* 新闻列表页 */
.news-list-item{
    display: flex;
    gap:20px;
    background:#fff;
    padding:16px;
    margin-bottom:20px;
}
.news-list-item .thumb{
    width:260px;
    height:160px;
    flex-shrink:0;
}
.news-list-item .thumb img{
    width:100%;
    height:100%;
    object-fit:cover;
}
.news-list-item .txt{
    flex:1;
}
.news-list-item .txt h3{
    font-size:18px;
    margin:0 0 8px;
}
.news-list-item .txt .date{
    font-size:13px;
    color:#888;
    margin-bottom:10px;
}
.news-list-item .txt p{
    color:#555;
    font-size:14px;
    line-height:1.6;
    margin:0;
}
@media (max-width:768px){
    .news-list-item{
        flex-direction: column;
    }
    .news-list-item .thumb{
        width:100%;
        height:180px;
    }
}
/* 关于我们 */
.about-block{
    background:#fff;
    padding:28px;
    border-radius:14px;
    box-shadow:0 10px 30px rgba(0,0,0,0.06);
}
.about-block h2{
    font-size:28px;
    margin-bottom:12px;
    color:#222;
}
.about-intro{
    font-size:15px;
    line-height:1.8;
    color:#555;
    margin-bottom:24px;
}
.about-main-img{
    width:100%;
    height:auto;
    display:block;
    border-radius:12px;
    margin-bottom:20px;
}
.about-bottom-text{
    font-size:15px;
    line-height:1.8;
    color:#555;
}
/* 联系我们 */
.contact-row{
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap:24px;
    background:#fff;
    padding:24px;
    margin-bottom:24px;
}
.contact-item h4{
    font-size:16px;
    margin:0 0 8px;
    color:#333;
}
.contact-item p{
    font-size:15px;
    color:#666;
    margin:0;
}
.map-wrap{
    width:100%;
    height:420px;
}
.map-wrap iframe{
    width:100%;
    height:100%;
    border:0;
}
@media (max-width:768px){
    .contact-row{
        grid-template-columns: 1fr;
    }
}

#images {
  display: flex;
  flex-wrap: wrap;
}
#images .img_img {
  width: 33.3333%;
  box-sizing: border-box;
  padding: 6px;
}
#images .img_img img {
  width: 100%;
  height: auto;
  display: block;
}
@media (max-width: 768px) {
  #images .img_img {
    width: 100%;
  }
}