/* ===== Reset & Base ===== */
*,*::before,*::after{margin:0;padding:0;box-sizing:border-box}
html{font-size:16px;scroll-behavior:smooth}
body{font-family:"Microsoft YaHei","PingFang SC","Helvetica Neue",Arial,sans-serif;color:#333;background:#f5f5f5;line-height:1.6}
a{text-decoration:none;color:inherit;transition:color .2s}
a:hover{color:#00CC66}
img{max-width:100%;display:block;height:auto}
ul,ol{list-style:none}
.container{max-width:1200px;margin:0 auto;padding:0 15px}
:root{
  --c-primary:#003366;
  --c-secondary:#0099CC;
  --c-accent:#00CC66;
  --c-white:#FFFFFF;
  --c-light:#CCFFFF;
  --c-dark:#000033;
  --c-text:#333333;
  --c-text-light:#666666;
  --c-bg:#f5f5f5;
}

/* ===== Header ===== */
.site-header{position:sticky;top:0;z-index:1000;background:#fff;box-shadow:0 2px 8px rgba(0,0,0,.08)}
.header-top{background:var(--c-primary);color:#fff;font-size:13px;padding:6px 0}
.header-top .container{display:flex;justify-content:space-between;align-items:center;flex-wrap:wrap;gap:5px}
.header-top .top-links a{color:rgba(255,255,255,.85);margin-left:15px;font-size:13px}
.header-top .top-links a:hover{color:var(--c-accent)}
.header-main{padding:15px 0}
.header-main .container{display:flex;align-items:center;justify-content:space-between;gap:20px}
.logo{display:flex;align-items:center;gap:10px}
.logo .logo-text{font-size:18px;font-weight:700;color:var(--c-primary);line-height:1.3}
.logo .logo-sub{font-size:12px;color:var(--c-text-light)}
.logo .logo-icon{width:50px;height:50px;background:linear-gradient(135deg,var(--c-primary),var(--c-secondary));border-radius:8px;display:flex;align-items:center;justify-content:center;color:#fff;font-size:20px;font-weight:700;flex-shrink:0}
.header-contact{display:flex;align-items:center;gap:20px}
.header-phone{text-align:right}
.header-phone .phone-label{font-size:12px;color:var(--c-text-light)}
.header-phone .phone-num{font-size:22px;font-weight:700;color:var(--c-primary)}
.nav-bar{background:linear-gradient(135deg,var(--c-primary) 0%,var(--c-dark) 100%);box-shadow:0 2px 8px rgba(0,51,102,.3)}
.nav-bar .nav-list{display:flex;align-items:center}
.nav-bar .nav-list>li{flex:1;text-align:center;position:relative}
.nav-bar .nav-list>li>a{display:block;color:#fff;padding:16px 20px;font-size:16px;font-weight:500;position:relative;transition:all .3s ease}
.nav-bar .nav-list>li>a::after{content:"";position:absolute;bottom:0;left:50%;width:0;height:3px;background:var(--c-accent);transition:all .3s ease;transform:translateX(-50%)}
.nav-bar .nav-list>li>a:hover::after,.nav-bar .nav-list>li.active>a::after{width:60%}
.nav-bar .nav-list>li>a:hover,.nav-bar .nav-list>li.active>a{background:rgba(255,255,255,.12)}
.nav-bar .nav-list>li.has-submenu>a::before{content:"";display:inline-block;width:0;height:0;border-left:4px solid transparent;border-right:4px solid transparent;border-top:5px solid rgba(255,255,255,.6);margin-left:6px;vertical-align:middle;transition:border-top-color .3s}
.nav-bar .nav-list>li.has-submenu:hover>a::before{border-top-color:var(--c-accent)}
.nav-bar .nav-list>li .submenu{position:absolute;top:100%;left:50%;background:#fff;min-width:200px;border-radius:0 0 8px 8px;box-shadow:0 8px 30px rgba(0,0,0,.12),0 2px 8px rgba(0,51,102,.08);display:block;opacity:0;visibility:hidden;transform:translateX(-50%) translateY(-10px);transition:all .3s cubic-bezier(.4,0,.2,1);z-index:100;border-top:3px solid var(--c-accent);overflow:hidden}
.nav-bar .nav-list>li:hover .submenu{opacity:1;visibility:visible;transform:translateX(-50%) translateY(0)}
.nav-bar .nav-list>li .submenu dd{margin:0}
.nav-bar .nav-list>li .submenu dd a{display:flex;align-items:center;padding:12px 20px;color:var(--c-text);font-size:14px;font-weight:500;border-bottom:1px solid #f0f2f5;transition:all .25s ease;position:relative;overflow:hidden}
.nav-bar .nav-list>li .submenu dd a::before{content:"";position:absolute;left:0;top:0;width:3px;height:100%;background:var(--c-primary);transform:scaleY(0);transition:transform .25s ease;transform-origin:top}
.nav-bar .nav-list>li .submenu dd a:hover{background:linear-gradient(90deg,rgba(0,51,102,.06) 0%,transparent 100%);color:var(--c-primary);padding-left:26px}
.nav-bar .nav-list>li .submenu dd a:hover::before{transform:scaleY(1)}
.nav-bar .nav-list>li .submenu dd:last-child a{border-bottom:none}
.nav-bar .nav-list>li .submenu dd a span{transition:color .25s ease}

/* ===== Mobile Nav Toggle ===== */
.nav-toggle{display:none;background:none;border:none;cursor:pointer;padding:5px;width:40px}
.nav-toggle span{display:block;width:25px;height:3px;background:#fff;margin:5px auto;border-radius:2px;transition:.3s}
.nav-toggle.open span:nth-child(1){transform:translateY(8px) rotate(45deg)}
.nav-toggle.open span:nth-child(2){opacity:0}
.nav-toggle.open span:nth-child(3){transform:translateY(-8px) rotate(-45deg)}

/* ===== Breadcrumb ===== */
.breadcrumb{background:#fff;padding:12px 0;border-bottom:1px solid #eee}
.breadcrumb ol{display:flex;align-items:center;gap:8px;font-size:13px;color:var(--c-text-light)}
.breadcrumb ol li a:hover{color:var(--c-primary)}
.breadcrumb ol li::after{content:"/";margin-left:8px;color:#ccc}
.breadcrumb ol li:last-child::after{content:""}
.breadcrumb ol li:last-child{color:var(--c-text)}

/* ===== Hero Banner ===== */
.hero{position:relative;height:420px;overflow:hidden;background:linear-gradient(135deg,var(--c-primary),var(--c-secondary))}
.hero::after{content:"";position:absolute;inset:0;background:rgba(0,51,102,.45)}
.hero img{width:100%;height:100%;object-fit:cover;opacity:.6}
.hero .hero-content{position:absolute;top:50%;left:50%;transform:translate(-50%,-50%);text-align:center;color:#fff;z-index:2;width:90%}
.hero h1{font-size:36px;font-weight:700;margin-bottom:15px;text-shadow:0 2px 8px rgba(0,0,0,.5)}
.hero p{font-size:18px;margin-bottom:25px;opacity:.9}
.hero .btn{display:inline-block;padding:12px 35px;font-size:16px;font-weight:600;border-radius:4px;transition:.3s}

/* ===== Section Common ===== */
.section{padding:50px 0;background:#fff}
.section-gray{background:var(--c-bg)}
.section-title{text-align:center;margin-bottom:35px}
.section-title h2{font-size:28px;color:var(--c-primary);font-weight:700;margin-bottom:10px}
.section-title p{font-size:14px;color:var(--c-text-light)}
.section-title::after{content:"";display:block;width:60px;height:3px;background:var(--c-accent);margin:10px auto 0}

/* ===== Product Grid ===== */
.product-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:20px}
.product-grid.cols-3{grid-template-columns:repeat(3,1fr)}
.product-card{background:#fff;border:1px solid #eee;border-radius:8px;overflow:hidden;transition:.3s}
.product-card:hover{box-shadow:0 8px 24px rgba(0,0,0,.12);transform:translateY(-4px)}
.product-card .card-img{overflow:hidden;height:200px;background:#f5f5f5}
.product-card .card-img img{width:100%;height:100%;object-fit:cover;transition:.3s}
.product-card:hover .card-img img{transform:scale(1.05)}
.product-card .card-body{padding:15px}
.product-card .card-title{font-size:15px;font-weight:600;color:var(--c-text);margin-bottom:5px;display:-webkit-box;-webkit-line-clamp:1;-webkit-box-orient:vertical;overflow:hidden}
.product-card .card-desc{font-size:13px;color:var(--c-text-light);display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}

/* ===== News List ===== */
.news-list{display:grid;grid-template-columns:repeat(3,1fr);gap:20px}
.news-card{background:#fff;border:1px solid #eee;border-radius:8px;overflow:hidden;transition:.3s}
.news-card:hover{box-shadow:0 8px 24px rgba(0,0,0,.12)}
.news-card .card-img{height:180px;overflow:hidden}
.news-card .card-img img{width:100%;height:100%;object-fit:cover;transition:.3s}
.news-card:hover .card-img img{transform:scale(1.05)}
.news-card .card-body{padding:15px}
.news-card .card-title{font-size:16px;font-weight:600;color:var(--c-text);margin-bottom:8px;display:-webkit-box;-webkit-line-clamp:1;-webkit-box-orient:vertical;overflow:hidden}
.news-card .card-date{font-size:12px;color:#999;margin-bottom:8px}
.news-card .card-desc{font-size:13px;color:var(--c-text-light);display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}

/* ===== Case List ===== */
.case-list{display:grid;grid-template-columns:repeat(3,1fr);gap:20px}
.case-card{background:#fff;border-radius:8px;overflow:hidden;box-shadow:0 2px 10px rgba(0,0,0,.06);transition:.3s}
.case-card:hover{box-shadow:0 8px 24px rgba(0,0,0,.12);transform:translateY(-4px)}
.case-card .card-img{height:220px;overflow:hidden}
.case-card .card-img img{width:100%;height:100%;object-fit:cover;transition:.3s}
.case-card:hover .card-img img{transform:scale(1.05)}
.case-card .card-body{padding:15px}
.case-card .card-title{font-size:16px;font-weight:600;color:var(--c-text);margin-bottom:5px}
.case-card .card-desc{font-size:13px;color:var(--c-text-light)}

/* ===== About Section ===== */
.about-section{display:grid;grid-template-columns:1fr 1fr;gap:40px;align-items:center}
.about-img img{border-radius:8px;box-shadow:0 4px 20px rgba(0,0,0,.1)}
.about-text h2{font-size:26px;color:var(--c-primary);margin-bottom:15px}
.about-text p{font-size:14px;color:var(--c-text-light);margin-bottom:15px;line-height:1.8}
.about-features{display:grid;grid-template-columns:repeat(2,1fr);gap:15px;margin-top:20px}
.about-feature{display:flex;align-items:center;gap:10px}
.about-feature .icon{width:40px;height:40px;background:var(--c-primary);border-radius:50%;display:flex;align-items:center;justify-content:center;color:#fff;font-size:18px;flex-shrink:0}
.about-feature .text{font-size:14px;color:var(--c-text);font-weight:500}

/* ===== Contact Section ===== */
.contact-section{display:grid;grid-template-columns:1fr 1fr;gap:40px}
.contact-info h2{font-size:24px;color:var(--c-primary);margin-bottom:20px}
.contact-info .contact-item{display:flex;align-items:flex-start;gap:15px;margin-bottom:20px;padding-bottom:20px;border-bottom:1px solid #eee}
.contact-info .contact-item:last-child{border-bottom:none}
.contact-info .contact-item .icon{width:40px;height:40px;background:var(--c-primary);border-radius:50%;display:flex;align-items:center;justify-content:center;color:#fff;font-size:18px;flex-shrink:0}
.contact-info .contact-item .info .label{font-size:13px;color:var(--c-text-light);margin-bottom:3px}
.contact-info .contact-item .info .value{font-size:16px;color:var(--c-text);font-weight:500}
.contact-form{background:#fff;padding:30px;border-radius:8px;box-shadow:0 2px 12px rgba(0,0,0,.08)}
.contact-form .form-group{margin-bottom:15px}
.contact-form label{display:block;font-size:14px;color:var(--c-text);margin-bottom:5px;font-weight:500}
.contact-form input,.contact-form textarea{width:100%;padding:10px 12px;border:1px solid #ddd;border-radius:4px;font-size:14px;font-family:inherit;transition:.3s}
.contact-form input:focus,.contact-form textarea:focus{border-color:var(--c-primary);outline:none;box-shadow:0 0 0 2px rgba(0,51,102,.1)}
.contact-form textarea{min-height:120px;resize:vertical}

/* ===== Detail Page ===== */
.detail-wrap{background:#fff;padding:30px;border-radius:8px;box-shadow:0 2px 12px rgba(0,0,0,.06);margin-bottom:30px}
.detail-header{border-bottom:2px solid var(--c-primary);padding-bottom:15px;margin-bottom:25px}
.detail-header h1{font-size:24px;color:var(--c-text);margin-bottom:10px}
.detail-header .meta{display:flex;flex-wrap:wrap;gap:15px;font-size:13px;color:var(--c-text-light)}
.detail-header .meta span{display:flex;align-items:center;gap:5px}
.detail-img{width:100%;border-radius:8px;margin-bottom:20px;max-height:450px;object-fit:cover}
.detail-content h2{font-size:20px;color:var(--c-primary);margin:25px 0 12px;padding-left:12px;border-left:4px solid var(--c-accent)}
.detail-content h3{font-size:17px;color:var(--c-text);margin:20px 0 10px}
.detail-content p{font-size:15px;color:#444;margin-bottom:15px;line-height:1.8;text-indent:2em}
.detail-content ul{margin:10px 0 15px 20px}
.detail-content ul li{font-size:14px;color:#555;margin-bottom:6px;list-style:disc}
.detail-content table{width:100%;border-collapse:collapse;margin:15px 0;font-size:14px}
.detail-content table th,.detail-content table td{border:1px solid #ddd;padding:8px 12px;text-align:left}
.detail-content table th{background:var(--c-primary);color:#fff;font-weight:500}
.detail-content table tr:nth-child(even){background:#f9f9f9}
.detail-sidebar{background:#fff;padding:20px;border-radius:8px;box-shadow:0 2px 12px rgba(0,0,0,.06)}
.detail-sidebar h3{font-size:16px;color:var(--c-primary);margin-bottom:15px;padding-bottom:10px;border-bottom:2px solid var(--c-accent)}
.detail-sidebar .related-item{display:flex;align-items:center;gap:10px;padding:10px 0;border-bottom:1px solid #eee}
.detail-sidebar .related-item:last-child{border-bottom:none}
.detail-sidebar .related-item img{width:60px;height:60px;object-fit:cover;border-radius:4px;flex-shrink:0}
.detail-sidebar .related-item .info{flex:1;min-width:0}
.detail-sidebar .related-item .info a{font-size:13px;color:var(--c-text);display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.detail-sidebar .related-item .info a:hover{color:var(--c-primary)}

/* ===== Layout Grid for Detail ===== */
.detail-layout{display:grid;grid-template-columns:1fr 300px;gap:25px}

/* ===== Pagination ===== */
.pagination{display:flex;justify-content:center;gap:8px;margin-top:35px}
.pagination a{display:inline-block;padding:8px 14px;border:1px solid #ddd;border-radius:4px;font-size:14px;color:var(--c-text);background:#fff;transition:.2s}
.pagination a:hover,.pagination a.active{background:var(--c-primary);color:#fff;border-color:var(--c-primary)}

/* ===== Buttons ===== */
.btn-primary{display:inline-block;padding:10px 28px;background:var(--c-primary);color:#fff!important;font-size:15px;font-weight:500;border-radius:4px;transition:.3s;border:none;cursor:pointer}
.btn-primary:hover{background:var(--c-secondary)}
.btn-accent{display:inline-block;padding:10px 28px;background:var(--c-accent);color:var(--c-dark)!important;font-size:15px;font-weight:600;border-radius:4px;transition:.3s;border:none;cursor:pointer}
.btn-accent:hover{background:#00b859}

/* ===== Footer ===== */
.site-footer{background:var(--c-dark);color:#999;padding:40px 0 0}
.footer-grid{display:grid;grid-template-columns:2fr 1fr 1fr 1fr;gap:30px;margin-bottom:30px}
.footer-col h4{font-size:16px;color:#fff;margin-bottom:15px;font-weight:600}
.footer-col p{font-size:13px;line-height:1.8;margin-bottom:8px}
.footer-col ul li{margin-bottom:8px}
.footer-col ul li a{font-size:13px;color:#999}
.footer-col ul li a:hover{color:var(--c-accent)}
.footer-bottom{border-top:1px solid #1a1a3a;padding:15px 0;text-align:center}
.footer-bottom p{font-size:13px;color:#666}
.footer-bottom a{color:#888;margin:0 5px}
.footer-bottom a:hover{color:var(--c-accent)}

/* ===== Stats Counter ===== */
.stats-bar{background:var(--c-primary);padding:40px 0}
.stats-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:20px}
.stat-item{text-align:center;color:#fff}
.stat-item .num{font-size:36px;font-weight:700;color:var(--c-accent)}
.stat-item .label{font-size:14px;opacity:.85;margin-top:5px}

/* ===== Responsive ===== */
@media(max-width:992px){
  .product-grid{grid-template-columns:repeat(3,1fr)}
  .footer-grid{grid-template-columns:1fr 1fr}
  .about-section,.contact-section{grid-template-columns:1fr}
  .detail-layout{grid-template-columns:1fr}
}
@media(max-width:768px){
  .nav-bar .nav-list{display:none;position:absolute;top:100%;left:0;right:0;flex-direction:column;background:var(--c-primary);max-height:80vh;overflow-y:auto;box-shadow:0 8px 20px rgba(0,0,0,.2)}
  .nav-bar .nav-list.open{display:flex}
  .nav-bar .nav-list>li{flex:none;text-align:left}
  .nav-bar .nav-list>li>a{padding:12px 20px}
  .nav-bar .nav-list>li.has-submenu>a::before{float:right;margin-top:6px;border-top:5px solid rgba(255,255,255,.6);border-left:5px solid transparent;border-right:5px solid transparent;transition:transform .3s}
  .nav-bar .nav-list>li.has-submenu.open-mobile>a::before{transform:rotate(180deg)}
  .nav-bar .nav-list>li .submenu{position:static;opacity:1;visibility:visible;transform:none;box-shadow:none;border-radius:0;border-top:none;background:rgba(0,0,0,.2);min-width:auto;display:none}
  .nav-bar .nav-list>li .submenu.show{display:block}
  .nav-bar .nav-list>li .submenu dd a{padding:10px 30px;font-size:13px;color:rgba(255,255,255,.85);border-bottom:1px solid rgba(255,255,255,.08)}
  .nav-bar .nav-list>li .submenu dd a:hover{background:rgba(255,255,255,.1);color:var(--c-accent);padding-left:36px}
  .nav-bar .nav-list>li .submenu dd a::before{display:none}
  .nav-toggle{display:block;margin:0 auto;padding:10px}
  .nav-bar .nav-bar-inner{position:relative}
  .header-contact{display:none}
  .hero{height:300px}
  .hero h1{font-size:24px}
  .hero p{font-size:14px}
  .product-grid,.news-list,.case-list{grid-template-columns:repeat(2,1fr)}
  .stats-grid{grid-template-columns:repeat(2,1fr)}
  .about-features{grid-template-columns:1fr}
  .section-title h2{font-size:22px}
  .logo .logo-text{font-size:14px}
  .logo .logo-sub{display:none}
  .footer-grid{grid-template-columns:1fr}
}
@media(max-width:480px){
  .product-grid,.news-list,.case-list{grid-template-columns:1fr}
  .header-top{font-size:12px}
  .header-top .top-links{display:none}
  .hero h1{font-size:20px}
  .detail-header h1{font-size:18px}
}