/* ============================================
   浙江盛坤防爆电气有限公司
   Premium Corporate Stylesheet v2.0
   Clean · Minimal · Professional
   ============================================ */

/* --- CSS Variables --- */
:root {
  /* Primary palette */
  --navy: #0a1628;
  --navy-light: #152238;
  --navy-mid: #1e3352;
  --white: #ffffff;
  --off-white: #f7f8fa;
  
  /* Gray scale */
  --gray-50: #f9fafb;
  --gray-100: #f0f2f5;
  --gray-200: #e4e7ed;
  --gray-300: #c8ced8;
  --gray-400: #8e99ab;
  --gray-500: #6b7a8f;
  --gray-600: #4a5568;
  --gray-700: #2d3748;
  
  /* Accent */
  --accent: #d47500;
  --accent-hover: #e88300;
  --accent-soft: #fef3e6;
  
  /* Legacy aliases for page compatibility */
  --bg-white: #ffffff;
  --bg-light: #f7f8fa;
  --border: #e4e7ed;
  --text-dark: #0a1628;
  --text-light: #6b7a8f;
  --text-body: #4a5568;
  --primary: #0a1628;
  --primary-light: #152238;
  --accent-bg: #fef3e6;
  --radius-sm: 6px;
  --radius-md: 12px;
  
  /* Layout */
  --max-w: 1120px;
  --radius: 8px;
  --radius-lg: 12px;
  --shadow-sm: 0 1px 3px rgba(10,22,40,0.04);
  --shadow-md: 0 4px 16px rgba(10,22,40,0.06);
  --shadow-lg: 0 8px 32px rgba(10,22,40,0.08);
  --header-h: 72px;
  --transition: 0.3s cubic-bezier(0.4,0,0.2,1);
}

/* --- Reset --- */
*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
html{font-size:16px;scroll-behavior:smooth;-webkit-font-smoothing:antialiased}
body{
  font-family:-apple-system,"PingFang SC","Microsoft YaHei","Helvetica Neue",Arial,sans-serif;
  color:var(--gray-600);
  line-height:1.7;
  background:var(--white);
  overflow-x:hidden;
}
a{color:var(--navy);text-decoration:none;transition:color var(--transition)}
a:hover{color:var(--accent)}
img{max-width:100%;height:auto;display:block}
ul,ol{list-style:none}

/* --- Container --- */
.container{width:100%;max-width:var(--max-w);margin:0 auto;padding:0 24px}

/* --- Typography --- */
h1,h2,h3,h4{color:var(--navy);font-weight:700;line-height:1.25}
h1{font-size:2.75rem}
h2{font-size:2rem;letter-spacing:-0.01em}
h3{font-size:1.25rem}
h4{font-size:1.1rem}
p{color:var(--gray-500);line-height:1.8}

/* --- Buttons --- */
.btn{
  display:inline-flex;align-items:center;gap:8px;
  padding:12px 28px;border-radius:var(--radius);
  font-size:0.9rem;font-weight:600;font-family:inherit;
  cursor:pointer;border:2px solid transparent;
  transition:all var(--transition);white-space:nowrap;
}
.btn-primary{
  background:var(--accent);color:var(--white);border-color:var(--accent);
}
.btn-primary:hover{background:var(--accent-hover);border-color:var(--accent-hover);color:var(--white);transform:translateY(-1px);box-shadow:0 4px 12px rgba(212,117,0,0.25)}
.btn-outline{
  background:transparent;color:var(--white);border-color:rgba(255,255,255,0.4);
}
.btn-outline:hover{background:var(--white);color:var(--navy);border-color:var(--white)}
.btn-outline-dark{
  background:transparent;color:var(--navy);border-color:var(--gray-300);
}
.btn-outline-dark:hover{border-color:var(--navy);color:var(--navy)}

/* --- Header --- */
.site-header{
  position:fixed;top:0;left:0;width:100%;height:var(--header-h);
  z-index:1000;transition:all var(--transition);
  background:transparent;
}
.site-header.scrolled{background:rgba(255,255,255,0.97);box-shadow:0 1px 0 var(--gray-200);backdrop-filter:blur(8px)}
.header-inner{
  display:flex;align-items:center;justify-content:space-between;
  height:100%;max-width:var(--max-w);margin:0 auto;padding:0 24px;
}
.logo{display:flex;align-items:center;gap:14px;flex-shrink:0}
.logo-img{width:42px;height:42px;object-fit:contain;border-radius:4px}
.logo-text{display:flex;flex-direction:column;gap:1px}
.logo-text h1{font-size:1.05rem;font-weight:700;color:var(--white);transition:color var(--transition);line-height:1.2;margin:0}
.scrolled .logo-text h1{color:var(--navy)}
.logo-text span{font-size:0.65rem;color:rgba(255,255,255,0.6);letter-spacing:0.8px;transition:color var(--transition)}
.scrolled .logo-text span{color:var(--gray-400)}

/* --- Nav --- */
.nav-menu{display:flex;align-items:center;gap:2px}
.nav-menu a{
  padding:8px 18px;font-size:0.85rem;font-weight:500;
  color:rgba(255,255,255,0.8);border-radius:var(--radius);
  transition:all var(--transition);position:relative;
}
.scrolled .nav-menu a{color:var(--gray-600)}
.nav-menu a:hover,.nav-menu a.active{color:var(--white);background:rgba(255,255,255,0.1)}
.scrolled .nav-menu a:hover,.scrolled .nav-menu a.active{color:var(--navy);background:var(--gray-100)}
.menu-toggle{display:none;flex-direction:column;gap:5px;cursor:pointer;padding:8px;background:none;border:none;z-index:1001}
.menu-toggle span{display:block;width:22px;height:2px;background:var(--white);border-radius:2px;transition:all var(--transition)}
.scrolled .menu-toggle span{background:var(--navy)}
.menu-toggle.active span:nth-child(1){transform:rotate(45deg) translate(5px,5px)}
.menu-toggle.active span:nth-child(2){opacity:0}
.menu-toggle.active span:nth-child(3){transform:rotate(-45deg) translate(5px,-5px)}

/* --- Hero --- */
.hero{
  position:relative;min-height:100vh;display:flex;align-items:center;
  background:var(--navy);overflow:hidden;
}
.hero-bg{
  position:absolute;inset:0;
  background:url("../images/banner/0938411s.jpg") center/cover no-repeat;
  opacity:0.35;z-index:1;
}
.hero-overlay{
  position:absolute;inset:0;
  background:linear-gradient(135deg, rgba(10,22,40,0.92) 0%, rgba(21,34,56,0.7) 100%);
  z-index:2;
}
.hero .container{position:relative;z-index:3;width:100%}
.hero-content{max-width:720px}
.hero-content .overline{
  font-size:0.8rem;text-transform:uppercase;letter-spacing:3px;
  color:var(--accent);font-weight:600;margin-bottom:16px;
}
.hero-content h2{
  font-size:2.75rem;font-weight:800;color:var(--white);line-height:1.15;margin-bottom:20px;
}
.hero-content h2 span{display:block;font-size:1.5rem;font-weight:400;color:rgba(255,255,255,0.7);margin-top:8px}
.hero-content p{font-size:1.05rem;color:rgba(255,255,255,0.6);line-height:1.8;margin-bottom:24px;max-width:600px}
.hero-badges{display:flex;gap:12px;flex-wrap:wrap;margin-bottom:28px}
.hero-badge{padding:6px 16px;border:1px solid rgba(255,255,255,0.2);border-radius:20px;font-size:0.8rem;color:rgba(255,255,255,0.75)}
.hero-actions{display:flex;gap:14px;flex-wrap:wrap;margin-bottom:48px}
.hero-stats{display:grid;grid-template-columns:repeat(4,1fr);gap:20px;padding-top:32px;border-top:1px solid rgba(255,255,255,0.08)}
.hero-stat .number{font-size:1.8rem;font-weight:800;color:var(--white);line-height:1}
.hero-stat .label{font-size:0.8rem;color:rgba(255,255,255,0.45);margin-top:6px}

/* --- Section --- */
.section{padding:80px 0}
.section-bg{background:var(--off-white)}
.section-dark{background:var(--navy);color:var(--white)}
.section-dark .section-header h2{color:var(--white)}
.section-dark .section-header .subtitle{color:rgba(255,255,255,0.6)}
.section-dark .section-header .line{background:var(--accent)}
.section-header{text-align:center;margin-bottom:48px}
.section-header h2{font-size:2rem;margin-bottom:12px}
.section-header .subtitle{font-size:1rem;color:var(--gray-400);max-width:560px;margin:0 auto}
.section-header .line{width:48px;height:3px;background:var(--accent);border-radius:2px;margin:16px auto 0}

/* --- Features --- */
.features-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:24px}
.feature-card{background:var(--white);border-radius:var(--radius-lg);padding:32px 24px;text-align:center;border:1px solid var(--gray-100);transition:all var(--transition)}
.feature-card:hover{transform:translateY(-4px);box-shadow:var(--shadow-md);border-color:var(--gray-200)}
.feature-card .icon{font-size:2.2rem;margin-bottom:16px;display:block}
.feature-card h3{font-size:1rem;margin-bottom:10px}
.feature-card p{font-size:0.85rem;color:var(--gray-400);line-height:1.7;margin:0}

/* --- Products Grid (Home & Full) --- */
.products-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.product-card{background:var(--white);border-radius:var(--radius-lg);overflow:hidden;border:1px solid var(--gray-100);transition:all var(--transition)}
.product-card:hover{transform:translateY(-4px);box-shadow:var(--shadow-md);border-color:var(--gray-200)}
.product-card .img-wrap{height:220px;overflow:hidden;position:relative;background:var(--gray-100)}
.product-card .img-wrap img{width:100%;height:100%;object-fit:cover;transition:transform 0.6s ease}
.product-card:hover .img-wrap img{transform:scale(1.06)}
.product-card .info{padding:20px 24px 24px}
.product-card .info h3{font-size:1rem;font-weight:600;margin-bottom:8px}
.product-card .info p{font-size:0.85rem;color:var(--gray-400);line-height:1.7;margin-bottom:12px}
.product-card .tags{display:flex;gap:6px;flex-wrap:wrap}
.product-card .tags span{padding:3px 10px;background:var(--gray-50);border:1px solid var(--gray-100);border-radius:4px;font-size:0.75rem;color:var(--gray-500)}
.product-card .badge{position:absolute;top:12px;left:12px;padding:4px 12px;border-radius:4px;font-size:0.75rem;font-weight:600;background:var(--accent);color:var(--white)}

/* --- Certificates --- */
.cert-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:24px}
.cert-card{background:rgba(255,255,255,0.06);border:1px solid rgba(255,255,255,0.1);border-radius:var(--radius-lg);padding:32px 24px;text-align:center;transition:all var(--transition)}
.cert-card:hover{background:rgba(255,255,255,0.1);transform:translateY(-3px)}
.cert-card .icon{font-size:2rem;margin-bottom:12px;display:block}
.cert-card h4{font-size:1rem;color:var(--white);margin-bottom:8px}
.cert-card p{font-size:0.85rem;color:rgba(255,255,255,0.5);margin:0}

/* --- News --- */
.news-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.news-card{background:var(--white);border-radius:var(--radius-lg);overflow:hidden;border:1px solid var(--gray-100);transition:all var(--transition)}
.news-card:hover{transform:translateY(-4px);box-shadow:var(--shadow-md)}
.news-card .img-wrap{height:200px;overflow:hidden}
.news-card .img-wrap img{width:100%;height:100%;object-fit:cover;transition:transform 0.6s ease}
.news-card:hover .img-wrap img{transform:scale(1.05)}
.news-card .info{padding:20px 24px 24px}
.news-card .info .date{font-size:0.78rem;color:var(--accent);font-weight:600;margin-bottom:8px}
.news-card .info h3{font-size:1rem;margin-bottom:8px;line-height:1.5}
.news-card .info p{font-size:0.85rem;color:var(--gray-400);line-height:1.7;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}

/* --- CTA --- */
.cta-section{background:var(--navy);padding:80px 0;text-align:center}
.cta-section h2{font-size:2rem;color:var(--white);margin-bottom:12px}
.cta-section p{font-size:1rem;color:rgba(255,255,255,0.6);margin-bottom:28px}

/* --- Footer --- */
.site-footer{background:var(--navy-light);padding:60px 0 0;color:rgba(255,255,255,0.5)}
.footer-grid{display:grid;grid-template-columns:2fr 1fr 1fr 1.5fr;gap:40px;margin-bottom:40px}
.footer-col h4{font-size:0.95rem;color:var(--white);margin-bottom:16px;font-weight:600}
.footer-col p{font-size:0.85rem;color:rgba(255,255,255,0.45);line-height:1.8;margin-bottom:4px}
.footer-col p a{color:rgba(255,255,255,0.45);transition:color var(--transition)}
.footer-col p a:hover{color:var(--accent)}
.footer-bottom{border-top:1px solid rgba(255,255,255,0.06);padding:20px 0;display:flex;justify-content:space-between;align-items:center;font-size:0.8rem;color:rgba(255,255,255,0.3)}
.footer-bottom a{color:rgba(255,255,255,0.3)}
.footer-bottom a:hover{color:var(--accent)}

/* --- Back to Top --- */
.back-top{position:fixed;bottom:30px;right:30px;width:44px;height:44px;border-radius:50%;background:var(--navy);color:var(--white);border:none;font-size:1.2rem;cursor:pointer;box-shadow:var(--shadow-md);opacity:0;visibility:hidden;transform:translateY(10px);transition:all var(--transition);z-index:999}
.back-top.visible{opacity:1;visibility:visible;transform:translateY(0)}
.back-top:hover{background:var(--accent);transform:translateY(-3px)}

/* --- Page Hero --- */
.page-hero{background:var(--navy);padding:120px 0 56px;position:relative;overflow:hidden}
.page-hero::before{content:"";position:absolute;inset:0;background:url("../images/banner/0938411s.jpg") center/cover no-repeat;opacity:0.15;z-index:0}
.page-hero .container{position:relative;z-index:1}
.page-hero .breadcrumb{font-size:0.82rem;color:rgba(255,255,255,0.4);margin-bottom:16px}
.page-hero .breadcrumb a{color:rgba(255,255,255,0.4)}
.page-hero .breadcrumb a:hover{color:var(--accent)}
.page-hero h2{font-size:2rem;color:var(--white);margin-bottom:8px}
.page-hero p{font-size:1rem;color:rgba(255,255,255,0.5);max-width:500px}

/* --- About --- */
.about-intro{display:grid;grid-template-columns:1fr 1fr;gap:50px;align-items:center}
.about-image{height:420px;border-radius:var(--radius-lg);overflow:hidden;position:relative}
.about-image img{width:100%;height:100%;object-fit:cover}
.about-features{display:grid;grid-template-columns:repeat(2,1fr);gap:24px}
.about-feature{background:var(--white);border-radius:var(--radius-md);padding:28px 24px;box-shadow:var(--shadow-sm);border:1px solid var(--gray-100);transition:all var(--transition)}
.about-feature:hover{transform:translateY(-3px);box-shadow:var(--shadow-md);border-color:var(--accent)}
.about-feature h4{font-size:16px;font-weight:600;color:var(--navy);margin-bottom:8px}
.about-feature p{font-size:14px;color:var(--gray-400);line-height:1.7;margin:0}

/* --- Culture --- */
.culture-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:20px}
.culture-card{background:var(--white);border-radius:var(--radius-lg);padding:32px 24px;text-align:center;border:1px solid var(--gray-100);border-top:3px solid var(--accent);transition:all var(--transition)}
.culture-card:hover{transform:translateY(-4px);box-shadow:var(--shadow-md)}
.culture-card .icon{font-size:2rem;margin-bottom:12px;display:block}
.culture-card h4{font-size:1rem;margin-bottom:8px}
.culture-card p{font-size:0.85rem;color:var(--gray-400);line-height:1.7;margin:0}

/* --- Cases --- */
.cases-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.case-card{background:var(--white);border-radius:var(--radius-lg);overflow:hidden;border:1px solid var(--gray-100);transition:all var(--transition)}
.case-card:hover{transform:translateY(-4px);box-shadow:var(--shadow-md);border-color:var(--gray-200)}
.case-card .case-img{height:200px;position:relative;overflow:hidden}
.case-card .case-img img{width:100%;height:100%;object-fit:cover;transition:transform 0.6s ease}
.case-card:hover .case-img img{transform:scale(1.08)}
.case-card .case-img .case-tag{position:absolute;bottom:12px;left:12px;background:var(--accent);color:white;padding:4px 14px;border-radius:20px;font-size:12px;font-weight:600}
.case-card .case-body{padding:20px 24px 24px}
.case-card .case-body h3{font-size:16px;font-weight:600;color:var(--navy);margin-bottom:8px}
.case-card .case-body p{font-size:14px;color:var(--gray-400);line-height:1.7;margin-bottom:12px}
.case-card .case-body .location{font-size:12px;color:var(--accent);font-weight:500;display:flex;align-items:center;gap:4px}

/* --- News List --- */
.news-list{max-width:800px;margin:0 auto}
.news-item{background:var(--white);border-radius:var(--radius-lg);padding:28px 32px;border:1px solid var(--gray-100);margin-bottom:16px;transition:all var(--transition)}
.news-item:hover{border-color:var(--gray-200);box-shadow:var(--shadow-sm);transform:translateX(3px)}
.news-item .date{font-size:0.8rem;color:var(--accent);font-weight:600;margin-bottom:6px}
.news-item h3{font-size:1.05rem;margin-bottom:8px;line-height:1.5}
.news-item h3 a{color:var(--navy)}
.news-item h3 a:hover{color:var(--accent)}
.news-item p{font-size:0.88rem;color:var(--gray-400);line-height:1.8}
.news-item .read-more{display:inline-block;margin-top:10px;font-size:0.8rem;color:var(--accent);font-weight:500}
.news-item .read-more:hover{color:var(--accent-hover)}

/* --- Pagination --- */
.pagination{display:flex;justify-content:center;gap:8px;margin-top:40px}
.pagination a{padding:8px 16px;border:1px solid var(--gray-200);border-radius:var(--radius);font-size:0.85rem;color:var(--gray-500);transition:all var(--transition)}
.pagination a:hover,.pagination a.active{background:var(--navy);color:var(--white);border-color:var(--navy)}

/* --- Contact --- */
.contact-grid{display:grid;grid-template-columns:1fr 1fr;gap:50px}
.contact-info-card{background:var(--white);border-radius:var(--radius-lg);padding:36px;box-shadow:var(--shadow-sm);border:1px solid var(--gray-100)}
.contact-info-card .item{display:flex;gap:16px;margin-bottom:24px}
.contact-info-card .item:last-child{margin-bottom:0}
.contact-info-card .item .icon-circle{width:44px;height:44px;background:var(--accent-soft);border-radius:50%;display:flex;align-items:center;justify-content:center;font-size:18px;flex-shrink:0}
.contact-info-card .item .detail h4{font-size:14px;font-weight:600;color:var(--navy);margin-bottom:4px}
.contact-info-card .item .detail p{font-size:14px;color:var(--gray-400);margin:0}
.contact-form{background:var(--white);border-radius:var(--radius-lg);padding:36px;box-shadow:var(--shadow-sm);border:1px solid var(--gray-100)}
.contact-form h3{font-size:20px;font-weight:600;color:var(--navy);margin-bottom:24px}
.form-group{margin-bottom:16px}
.form-group label{display:block;font-size:13px;font-weight:600;color:var(--navy);margin-bottom:6px}
.form-group input,.form-group textarea,.form-group select{width:100%;padding:12px 16px;border:1px solid var(--gray-200);border-radius:var(--radius-sm);font-size:14px;font-family:inherit;transition:border-color var(--transition);background:var(--off-white)}
.form-group input:focus,.form-group textarea:focus,.form-group select:focus{outline:none;border-color:var(--accent);background:var(--white);box-shadow:0 0 0 3px var(--accent-soft)}
.form-group textarea{height:120px;resize:vertical}
.form-btn{width:100%;justify-content:center}

/* --- Transport --- */
.transport-grid{display:grid;grid-template-columns:1fr 1fr;gap:30px;align-items:center;background:var(--white);border-radius:var(--radius-lg);padding:30px;border:1px solid var(--gray-100)}
.transport-grid .info p{font-size:0.85rem;color:var(--gray-400);line-height:1.8;margin-bottom:8px}
.transport-grid .info p strong{color:var(--gray-600)}
.transport-grid .map-placeholder{height:200px;background:var(--gray-100);border-radius:var(--radius-lg);display:flex;align-items:center;justify-content:center;font-size:2.5rem;color:var(--gray-300)}

/* --- Page Content --- */
.page-content{background:var(--white);border-radius:var(--radius-lg);padding:40px;border:1px solid var(--gray-100)}
.page-content p{font-size:0.92rem;line-height:1.9;margin-bottom:16px;color:var(--gray-500)}

/* --- Utility --- */
.text-center{text-align:center}
.mt-4{margin-top:32px}

/* --- Responsive --- */
@media(max-width:1024px){
  .features-grid{grid-template-columns:repeat(2,1fr)}
  .products-grid{grid-template-columns:repeat(2,1fr)}
  .news-grid{grid-template-columns:repeat(2,1fr)}
  .cert-grid{grid-template-columns:repeat(2,1fr)}
  .footer-grid{grid-template-columns:1fr 1fr}
  .cases-grid{grid-template-columns:repeat(2,1fr)}
  .culture-grid{grid-template-columns:repeat(2,1fr)}
}
@media(max-width:768px){
  :root{--header-h:60px}
  .menu-toggle{display:flex}
  .nav-menu{
    position:fixed;top:var(--header-h);left:0;width:100%;background:var(--white);
    flex-direction:column;padding:8px 16px 16px;gap:0;
    box-shadow:0 4px 24px rgba(10,22,40,0.12);
    transform:translateY(-100%);opacity:0;pointer-events:none;
    transition:all 0.3s ease;border-top:1px solid var(--gray-100);
  }
  .nav-menu.open{transform:translateY(0);opacity:1;pointer-events:all}
  .nav-menu a{padding:14px 16px;width:100%;font-size:0.9rem;color:var(--gray-600)!important;border-bottom:1px solid var(--gray-100)}
  .nav-menu a:last-child{border-bottom:none}
  .nav-menu a:hover,.nav-menu a.active{background:var(--gray-100)!important}
  .hero{min-height:auto;padding:80px 0}
  .hero-content h2{font-size:2rem}
  .hero-content h2 span{font-size:1.1rem}
  .hero-content p{font-size:0.9rem}
  .hero-stats{grid-template-columns:repeat(2,1fr);gap:20px}
  .section{padding:56px 0}
  .features-grid{grid-template-columns:1fr 1fr;gap:16px}
  .products-grid{grid-template-columns:1fr}
  .news-grid{grid-template-columns:1fr}
  .cert-grid{grid-template-columns:repeat(2,1fr)}
  .about-intro{grid-template-columns:1fr;gap:32px}
  .about-features{grid-template-columns:1fr}
  .contact-grid{grid-template-columns:1fr}
  .cases-grid{grid-template-columns:1fr}
  .culture-grid{grid-template-columns:repeat(2,1fr)}
  .footer-grid{grid-template-columns:1fr;gap:24px}
  .footer-bottom{flex-direction:column;text-align:center}
  .page-hero{padding:100px 0 40px}
  .page-hero h2{font-size:1.6rem}
  .transport-grid{grid-template-columns:1fr}
  .section-header h2{font-size:1.5rem}
  .cta-section h2{font-size:1.4rem}
  .hero-stat .number{font-size:1.4rem}
}
@media(max-width:480px){
  .hero-content h2{font-size:1.6rem}
  .features-grid{grid-template-columns:1fr}
  .cert-grid{grid-template-columns:1fr}
  .hero-stats{grid-template-columns:1fr 1fr}
  .culture-grid{grid-template-columns:1fr}
  .logo-text h1{font-size:0.9rem}
  .logo-text span{font-size:0.6rem}
}