/* ========== Reset & Base ========== */
*, *::before, *::after { margin: 0; padding: 0; box-sizing: border-box; }
html { scroll-behavior: smooth; }


body {
  font-family: "Microsoft YaHei",  Arial, sans-serif;
  font-size: 16px;
  line-height: 1.7;
  color: #333;
  overflow-x: hidden;
}


ul,ol ,li {
  list-style: none;    /* 去掉小圆点 */
  padding-left: 0;     /* 去掉左边默认空白 */
  margin-left: 0;

}




a { text-decoration: none; color: #333; transition: all .3s; }
a:hover { color: #e53925; }
ul, ol { list-style: none; }
img { max-width: 100%; height: auto; border: 0; }
.clearfix::after { content: ""; display: block; clear: both; }
.container { width: 1300px; margin: 0 auto; }

/* ========== Top Bar ========== */
.top-bar {
  height: 43px;
  background: #171717;
  color: #ccc;
  font-size: 12px;
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  z-index: 101;
}







.fade-in img{

  display:block;
}

.on{ color: #f00}

.news {display: flex ; justify-content: space-between; flex-wrap: wrap}
.newsLi {width: calc(33.333% - 11px)}


.top-bar .container { display: flex; justify-content: space-between; align-items: center; height: 100%; }
.top-bar .left { display: flex; align-items: center; gap: 28px; }
.top-bar .left .welcome { font-size: 16px; }
.top-bar .left .phone { font-size: 16px; }
.top-bar .right { display: flex; align-items: center; gap: 10px; }
.top-bar .right a { color: #ccc; font-size: 16px; }
.top-bar .right a:hover { color: #fff; }
.top-bar .right span { color: #ccc; }

/* ========== Navbar ========== */
.navbar {
  position: fixed;
  top: 43px;
  left: 0;
  width: 100%;
  z-index: 100;
  background: rgba(255,255,255,0.95);
  box-shadow: 0 2px 10px rgba(0,0,0,0.1);
  transition: all .4s;
}
.navbar.no-bg {
  background: transparent;
  box-shadow: none;
  border-bottom: 1px solid #c8c8c8;
}
.navbar.no-bg .logo-text { color: #fff; }
.navbar.no-bg .logo-text .sub { color: #ccc; }
.navbar.no-bg .nav-links > li > a { color: #fff; }
.navbar.no-bg .nav-links > li > a:hover { color: #e53925; }
.navbar.no-bg .search-btn { border-color: rgba(255,255,255,0.5); color: #fff; }
.navbar.no-bg .mobile-toggle { color: #fff; }

.navbar.scrolled {
  background: rgba(255,255,255,0.98);
  box-shadow: 0 2px 10px rgba(0,0,0,0.1);
}
.navbar.scrolled .logo-text { color: #333; }
.navbar.scrolled .logo-text .sub { color: #999; }
.navbar.scrolled .nav-links > li > a { color: #333; }
.navbar.scrolled .search-btn { border-color: #ddd; color: #333; }
.navbar.scrolled .mobile-toggle { color: #333; }
.navbar.scrolled .mobile-toggle span { background: #333; }
.navbar .container { display: flex; align-items: center; justify-content: space-between; height: 88px; }
.navbar .logo { display: flex; align-items: center; }
.navbar .logo img { height: 50px; }
.navbar .logo .logo-text { font-size: 22px; font-weight: 800; color: #333; margin-left: 10px; }
.navbar .logo .logo-text .sub { font-size: 12px; color: #999; font-weight: 400; }
.navbar .nav-links { display: flex; align-items: center; gap: 0; }
.navbar .nav-links > li { position: relative; }
.navbar .nav-links > li > a {
  display: block;
  padding: 10px 18px;
  font-size: 16px;
  font-weight: 600;
  color: #333;
  transition: color .3s;
}
.navbar .nav-links > li > a:hover,
.navbar .nav-links > li.active > a { color: #e53925; }

/* Mobile Toggle Button (hamburger) */
.navbar .mobile-toggle {
  display: none;
  width: 40px; height: 40px;
  cursor: pointer;
  position: relative;
  z-index: 110;
}
.navbar .mobile-toggle span {
  display: block;
  width: 24px; height: 2px;
  background: #333;
  margin: 5px auto;
  transition: all .3s;
}
.navbar .mobile-toggle.open span:nth-child(1) { transform: rotate(45deg) translate(5px, 5px); }
.navbar .mobile-toggle.open span:nth-child(2) { opacity: 0; }
.navbar .mobile-toggle.open span:nth-child(3) { transform: rotate(-45deg) translate(5px, -5px); }

/* Mobile Navigation Panel */
.navbar .mobile-nav {
  position: fixed;
  top: 0; left: 0;
  width: 100%; height: 100%;
  background: rgba(0,0,0,0.5);
  z-index: 109;
  display: none;
  opacity: 0;
  transition: opacity .3s;
}
.navbar .mobile-nav.open { display: block; opacity: 1; }
.navbar .mobile-nav .mobile-menu {
  position: fixed;
  top: 0; right: 0;
  width: 280px; height: 100%;
  background: #fff;
  z-index: 110;
  padding: 80px 0 30px;
  transform: translateX(100%);
  transition: transform .3s;
  overflow-y: auto;
  box-shadow: -5px 0 15px rgba(0,0,0,0.1);
}
.navbar .mobile-nav.open .mobile-menu { transform: translateX(0); }
.navbar .mobile-nav .mobile-menu .mobile-close {
  position: absolute; top: 20px; right: 20px;
  width: 36px; height: 36px;
  font-size: 24px; color: #333;
  cursor: pointer;
  display: flex; align-items: center; justify-content: center;
  border: none; background: none;
}
.navbar .mobile-nav .mobile-menu li { border-bottom: 1px solid #eee; }
.navbar .mobile-nav .mobile-menu li a {
  display: block; padding: 14px 25px;
  font-size: 16px; color: #333; font-weight: 600;
}
.navbar .mobile-nav .mobile-menu li a:hover { color: #e53925; background: #f5f5f5; }
.navbar .mobile-nav .mobile-menu li.active > a { color: #e53925; }
.navbar .mobile-nav .mobile-menu .sub-menu li a {
  padding: 10px 25px 10px 45px;
  font-size: 14px; font-weight: 400;
  color: #666;
}
.navbar .mobile-nav .mobile-menu .sub-menu { display: none; }
.navbar .mobile-nav .mobile-menu .has-sub.open .sub-menu { display: block; }
.navbar .mobile-nav .mobile-menu .has-sub > a::after {
  content: "+";
  float: right;
  font-weight: 400;
  font-size: 18px;
  color: #999;
}
.navbar .mobile-nav .mobile-menu .has-sub.open > a::after { content: "-"; }

/* Dropdown */
.navbar .nav-links > li .dropdown {
  position: absolute;
  top: 100%;
  left: 0;
  background: #fff;
  min-width: 180px;
  box-shadow: 0 4px 15px rgba(0,0,0,0.15);
  border-radius: 4px;
  opacity: 0;
  visibility: hidden;
  transform: translateY(10px);
  transition: all .3s;
  z-index: 200;
}
.navbar .nav-links > li:hover .dropdown {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}
.navbar .nav-links > li .dropdown li a {
  display: block;
  padding: 10px 20px;
  font-size: 14px;
  color: #333;
  border-bottom: 1px solid #eee;
  transition: all .3s;
}
.navbar .nav-links > li .dropdown li a:hover {
  background: #e53925;
  color: #fff;
}
.navbar .search-btn {
  width: 30px; height: 30px;
  border: 1px solid #ddd;
  border-radius: 50%;
  display: flex; align-items: center; justify-content: center;
  cursor: pointer;
  transition: all .3s;
}
.navbar .search-btn:hover { border-color: #e53925; color: #e53925; }

/* ========== Banner Swiper ========== */
.banner { width: 100%; height: calc(100vh - 131px); position: relative; overflow: hidden; margin-top: 31px; }
.banner .swiper { width: 100%; height: 100%; position: relative; }
.banner .slide {
  width: 100%; height: 100%;
  background-size: cover;
  background-position: center;
  position: absolute;
  top: 0; left: 0;
  transition: opacity 1s ease;
}
.banner .slide .overlay {
  position: absolute; top: 0; left: 0; width: 100%; height: 100%;
  background: rgba(0,0,0,0.3);
}
.banner .slide .content {
  position: absolute; top: 30%; left: 50%; transform: translate(-50%, -50%);
  text-align: center; color: #fff; z-index: 2;
  opacity: 0;
  transition: opacity 1s ease 0.3s;
}
.banner .slide[style*="opacity: 1"] .content,
.banner .slide.active .content {
  opacity: 1;
}
.banner .slide .content h2 { font-size: 48px; font-weight: 800; margin-bottom: 15px; }
.banner .slide .content p { font-size: 20px; font-weight: 300; }
.banner .swiper-btn {
  position: absolute; top: 50%; transform: translateY(-50%);
  width: 50px; height: 50px;
  background: rgba(255,255,255,0.3);
  border: none; border-radius: 50%;
  color: #fff; font-size: 24px;
  cursor: pointer; transition: background .3s; z-index: 10;
  display: flex; align-items: center; justify-content: center;
}
.banner .swiper-btn:hover { background: rgba(255,255,255,0.6); }
.banner .swiper-prev { left: 30px; }
.banner .swiper-next { right: 30px; }
.banner .swiper-pagination {
  position: absolute; bottom: 40px; left: 50%; transform: translateX(-50%);
  display: flex; gap: 10px; z-index: 10;
}
.banner .swiper-pagination .dot {
  width: 40px; height: 4px; background: rgba(255,255,255,0.5);
  border-radius: 2px; cursor: pointer; transition: background .3s;
}
.banner .swiper-pagination .dot.active { background: #fff; width: 60px; }

/* ========== Section Title ========== */
.section-title { text-align: center; padding-bottom: 53px; }
.section-title .cn { font-size: 36px; font-weight: 800; color: #e53925; }
.section-title .cn a { color: #e53925; }
.section-title .cn.dark a { color: #333; }
.section-title .en { font-size: 22px; color: #999; font-weight: 200; }

/* ========== Product Center ========== */
.product-section { padding: 90px 0; overflow: hidden; }
.product-tabs { display: flex; justify-content: center; gap: 12px; margin-bottom: 30px; }
.product-tabs .tab-btn {
  padding: 8px 24px;
  border: 1px solid #999;
  border-radius: 12px;
  font-size: 16px;
  color: #333;
  cursor: pointer;
  transition: all .3s;
  background: transparent;
}
.product-tabs .tab-btn:hover,
.product-tabs .tab-btn.active {
  background: #e53925;
  color: #fff;
  border-color: #e53925;
}
.product-grid { display: flex; justify-content: center; gap: 22px; }
.product-card {
  width: 30%;
  background: #fff;
  border: 1px solid #ddd;
  border-radius: 25px;
  overflow: hidden;
  transition: box-shadow .3s;
}
.product-card:hover { box-shadow: 0 5px 20px rgba(0,0,0,0.1); }
.product-card .img-wrap {
  width: 100%;
  height: 282px;
  overflow: hidden;
}
.product-card .img-wrap img {
  width: 100%; height: 100%; object-fit: cover;
  transition: transform 1s ease-out;
}
.product-card:hover .img-wrap img { transform: scale(1.1); }
.product-card .name {
  padding: 20px 20px 10px;
  font-size: 18px;
  font-weight: 800;
  text-align: center;

  line-height: 30px;
  overflow: hidden;
}
.product-card .desc {
  padding: 0 25px;
  font-size: 14px;
  color: #666;
  height: 50px;
  overflow: hidden;
}
.product-card .more-btn {
  display: block;
  width: 160px;
  margin: 30px auto 25px;
  padding: 10px 0;
  text-align: center;
  border: 1px solid #666;
  border-radius: 12px;
  color: #666;
  font-size: 14px;
  transition: all .3s;
}
.product-card .more-btn:hover {
  background: #e53925;
  color: #fff;
  border-color: #e53925;
}

/* ========== About Us ========== */
.about-section {
  padding: 100px 0;
  background: #333;
  overflow: hidden;
}
.about-section .container { display: flex; align-items: flex-start; }
.about-section .left { flex: 1; }
.about-section .left .section-title .cn { color: #fff; }
.about-section .left .section-title .cn a { color: #fff; }
.about-section .left .slogan { font-size: 28px; color: #fff; font-weight: 400; margin-bottom: 30px; }
.about-section .left .info { font-size: 16px; color: #ddd; line-height: 200%; margin-bottom: 50px;  margin-right: 20px}
.about-section .left .info p { margin-bottom: 15px; }
.about-section .left .detail-btn {
  display: inline-block;
  width: 218px; height: 61px;
  background: #e53925;
  color: #fff;
  text-align: center;
  line-height: 61px;
  font-size: 16px;
  transition: background .3s;
}
.about-section .left .detail-btn:hover { background: #c62828; }
.about-section .right { width: 611px; }
.about-section .right img { width: 100%; border-radius: 8px; }

/* ========== News ========== */
.news-section { padding: 90px 0; overflow: hidden; }
.news-grid { display: flex; justify-content: center; gap: 22px; }
.news-card { width: 30%; }
.news-card .img-wrap {
  width: 100%; height: 200px; overflow: hidden; border-radius: 6px;
}
.news-card .img-wrap img { width: 100%; height: 100%; object-fit: cover; transition: transform .5s; }
.news-card:hover .img-wrap img { transform: scale(1.05); }
.news-card .title { font-size: 18px; font-weight: 800; margin-top: 25px; margin-bottom: 15px; height: 25px; overflow: hidden; }
.news-card .title a { color: #333; }
.news-card .title a:hover { color: #e53925; }
.news-card .summary { font-size: 14px; color: #666; height: 55px; overflow: hidden; line-height: 200%; }
.news-card .meta { display: flex; justify-content: space-between; align-items: center; margin-top: 20px; }
.news-card .meta .more-link { color: #e53925; font-size: 14px; }
.news-card .meta .more-link:hover { color: #c62828; }
.news-card .meta .date { font-size: 14px; color: #666; }

/* ========== Friend Links ========== */
.friend-links { background: #e53925; padding: 20px 0; }
.friend-links .container { display: flex; justify-content: center; gap: 25px; }
.friend-links a { color: #fff; font-size: 14px; }
.friend-links a:hover { color: #ccc; }

/* ========== Footer ========== */
.footer {
  background: url("../images/nhdswl_bg3.png") ;


  background-size: contain;
  background-color: #17203b;
  background-blend-mode: overlay;

  background-repeat: no-repeat; /* 不重复 */
  background-position: center center; /* 居中 */


  padding: 73px 0 30px;
  color: #fff;
  overflow: hidden;
}
.footer .container { display: flex; justify-content: space-between; }
.footer .col-logo { width: 400px; }
.footer .col-logo .logo-img { width: 400px; margin-bottom: 16px; text-align: center; font-size:24px;font-weight:800;color:#fff; }
.footer .col-logo .logo-img img { width: 100%; }
.footer .col-logo .qr-code { width: 200px; margin: 0 auto 20px; text-align: center; }
.footer .col-logo .qr-code img { width: 200px;  background: #fff; }
.footer .col-logo .qr-code p { font-size: 16px; padding-top: 10px; }
.footer .col-logo .social-icons { display: flex; justify-content: center; gap: 10px; }
.footer .col-logo .social-icons a {
  width: 39px; height: 39px;
  background: rgba(255,255,255,0.2);
  border-radius: 50%;
  display: flex; align-items: center; justify-content: center;
  color: #fff; font-size: 16px;
  transition: background .3s;
}

.footer  dt{
  font-size:24px;font-weight:800;color:#fff;
  margin-bottom: 10px;
}

.footer  dd{
  font-size:18px;color:#d1d1d1;

}

.footer  dd a{
  font-size:18px;color:#d1d1d1;
}


.in_product{  }


.leftTitle{
font-size:20px;font-weight:700;;padding-left:30px; height: 50px; line-height: 50px; background-color: #e53925;color: #fff;

  border-radius:  6px 6px 0 0;
}

.leftBig{
  border: 1px solid #ccc; border-radius: 0 0 6px 6px ;
}

.leftBig li{ padding-left: 60px ; border-bottom: 1px  solid #ccc; height: 42px ; line-height: 42px}




.footer .col-logo .social-icons a:hover { background: #e53925; }

.footer .col-contact { width: 300px; margin-left: 50px; }
.footer .col-contact .phones { display: flex; flex-wrap: wrap; }
.footer .col-contact .phones li { width: 50%; font-size: 14px; color: #fff; margin-bottom: 10px; }
.footer .col-contact .qr-row { display: flex; gap: 15px; margin-top: 15px; }
.footer .col-contact .qr-item { width: 129px; text-align: center; }
.footer .col-contact .qr-item img { width: 129px; height: 129px; background: #fff; }
.footer .col-contact .qr-item p { font-size: 14px; padding-top: 10px; color: #fff; }

.footer .col-right { width: 450px; }
.footer .col-right .phone-big { font-size: 18px; color: #fff; margin-bottom: 33px; }
.footer .col-right .form-row { display: flex; gap: 15px; margin-bottom: 15px; }
.footer .col-right .form-row input {
  width: 50%; padding: 10px 15px; font-size: 14px;
  background: rgba(255,255,255,0.15);
  border: 1px solid rgba(255,255,255,0.3);
  border-radius: 4px; color: #fff;
}
.footer .col-right textarea {
  width: 100%; height: 60px; padding: 8px 15px; font-size: 14px;
  background: rgba(255,255,255,0.15);
  border: 1px solid rgba(255,255,255,0.3);
  border-radius: 4px; color: #fff; margin-bottom: 15px;
  resize: none;
}
.footer .col-right .submit-btn {
  width: auto; padding: 10px 25px;
  background: #e53925; color: #fff; border: none;
  border-radius: 4px; font-size: 16px; cursor: pointer;
  transition: background .3s;
}
.footer .col-right .submit-btn:hover { background: #c62828; }

.footer .bottom-bar {
  width: 95%; margin: 35px auto 0;
  border-top: 1px solid #d1d1d1;
  padding-top: 25px;
  text-align: center;
  color: #999;
  font-size: 18px;
}
.footer .bottom-bar a { color: #999; }
.footer .bottom-bar a:hover { color: #fff; }

/* ========== Page Banner ========== */
.page-banner {
  height: 350px;
  margin-top: 131px;
  background-size: cover;
  background-position: center;
  display: flex;
  align-items: center;
  justify-content: center;
  color: #fff;
  position: relative;
  background: url("/images/b5.jpg");
}
.page-banner::after {
  content: "";
  position: absolute; top: 0; left: 0; width: 100%; height: 100%;
  background: rgba(0,0,0,0.6);
}
.page-banner .text { z-index: 2; text-align: center; }
.page-banner .text h1 { font-size: 42px; font-weight: 800; }
.page-banner .text p { font-size: 22px; font-weight: 200; margin-top: 10px; }

/* ========== Breadcrumb ========== */
.breadcrumb {
  border-bottom: 1px solid #ddd;
  padding: 12px 0;
  font-size: 14px;
  color: #666;
}
.breadcrumb a { color: #666; margin-right: 8px; }
.breadcrumb a:hover { color: #e53925; }

/* ========== Pagination ========== */
.pagination { display: flex; justify-content: center; gap: 8px; margin-top: 30px; }
.pagination a {
  display: block; padding: 8px 14px;
  background: #fff; color: #666;
  border-radius: 4px; border: 1px solid #ddd;
  transition: all .3s;
}
.pagination a:hover, .pagination a.active { background: #e53925; color: #fff; border-color: #e53925; }

/* ========== Floating Sidebar ========== */
.float-sidebar {
  position: fixed;
  right: 0;
  top: 50%;
  transform: translateY(-50%);
  z-index: 55;
}
.float-item {
  width: 84px; height: 84px;
  background: #353535;
  display: flex; align-items: center; justify-content: center;
  color: #fff; cursor: pointer;
  position: relative;
  transition: background .3s;
  font-size: 22px;
}
.float-item:hover { background: #e53925; }
.float-item + .float-item { margin-top: 2px; }

/* Tooltip appears to the left on hover */
.float-tooltip {
  position: absolute;
  right: 82px;
  top: 50%;
  transform: translateY(-50%);
  background: #fff;
  border: 1px solid #ddd;
  border-radius: 6px;
  padding: 12px 16px;
  white-space: nowrap;
  font-size: 14px;
  color: #333;
  box-shadow: 0 4px 15px rgba(0,0,0,0.15);
  opacity: 0;
  visibility: hidden;
  transition: all .3s;
  pointer-events: none;
}
.float-item:hover .float-tooltip {
  opacity: 1;
  visibility: visible;
  transform: translateY(-50%) translateX(0);
}
/* Arrow pointing right */
.float-tooltip::after {
  content: "";
  position: absolute;
  right: -8px;
  top: 50%;
  transform: translateY(-50%);
  border: 4px solid transparent;
  border-left-color: #ddd;
}
/* WeChat QR tooltip */
.float-tooltip.wechat-tip {
  width: 200px;
  padding: 10px;
  text-align: center;
  line-height: 1.4;
}
.float-tooltip.wechat-tip img {
  width: 200px;
  display: block;
  margin-bottom: 6px;
  border: 1px solid #eee;
}
.float-tooltip.wechat-tip span {
  font-size: 12px;
  color: #666;
}
/* Back-to-top item */
.float-item.float-top {
  opacity: 0;
  visibility: hidden;
  transition: all .3s;
}
.float-item.float-top.show {
  opacity: 1;
  visibility: visible;
}

/* ========== Animations ========== */
.fade-in { opacity: 0; transform: translateY(30px); transition: all .8s ease; }
.fade-in.visible { opacity: 1; transform: translateY(0);
}

.product-tab-panel {
  justify-content: space-between;
}

.slide-left { opacity: 0; transform: translateX(-50px); transition: all .8s ease; }
.slide-left.visible { opacity: 1; transform: translateX(0); }
.slide-right { opacity: 0; transform: translateX(50px); transition: all .8s ease; }
.slide-right.visible { opacity: 1; transform: translateX(0); }





.navbar.no-bg .nav-links > li > a{
  color: #000;

}
.navbar.no-bg .nav-links > li.active > a{
  color: #e53925;
}




/* ========== Responsive ========== */
@media screen and (max-width: 1400px) {
  .container { width: 96%; }
}
@media screen and (max-width: 768px) {


  .banner .slide .content h2{
    font-size: 1rem;
  }


  .container { width: 96%; }
  .navbar .nav-links { display: none; }
  .navbar .search-btn { display: none; }
  .navbar .mobile-toggle { display: flex; flex-direction: column; align-items: center; justify-content: center; }
  .top-bar .right { display: none; }
  .banner { height: 400px; }
  .product-grid { flex-wrap: wrap; }
  .product-card { width: 100%;  margin-bottom: 20px;}
  .news-grid { flex-wrap: wrap; }
  .news-card { width: 100%; }
  .about-section .container { flex-direction: column; }
  .about-section .right { width: 100%; }
  .footer .container { flex-direction: column; }
  .float-sidebar { display: none; }
  .product-tabs { flex-wrap: wrap; }
  .page-banner { height: 250px; }

  .navbar.no-bg .mobile-toggle span{
    color: #000;
  }
.col-contact{display: none}

  .about-section .left .info{    margin-right: 0px;}


}