/* ============================================
   ISOIL中国区总代理网站 - 核心样式表
   品牌：ISOIL Industria S.p.A. (Italy, est.1958)
   产品线：ISOMAG电磁流量计 | ISOFLUX超声波流量计 | ISONRG热能表 | ISOD@M数据管理软件
   ============================================ */

/* ===== Reset & Base ===== */
*,*::before,*::after{margin:0;padding:0;box-sizing:border-box}
html{scroll-behavior:smooth;font-size:16px;-webkit-text-size-adjust:100%}
body{font-family:"Microsoft YaHei","PingFang SC","Helvetica Neue",Arial,sans-serif;color:#333;background:#fff;line-height:1.7;overflow-x:hidden}
a{text-decoration:none;color:inherit;transition:color .25s}
img{max-width:100%;height:auto;display:block}
ul,ol{list-style:none}
table{border-collapse:collapse;width:100%}
input,textarea,select,button{font:inherit;outline:none;border:none}
button{cursor:pointer;background:none}

:root{
  --c-navy:#0a1929;
  --c-navy-light:#142b47;
  --c-blue:#0066b3;
  --c-blue-light:#1a8acc;
  --c-teal:#00a0a0;
  --c-teal-light:#1ab8b8;
  --c-teal-dark:#006666;
  --c-bg:#f5f7fa;
  --c-border:#e0e4e8;
  --c-border-light:#eef1f5;
  --c-text:#333;
  --c-text-light:#666;
  --c-text-muted:#999;
  --c-white:#fff;
  --c-red:#d63031;
  --c-green:#00a854;
  --c-warning:#f59e0b;
  --c-warning-light:#fef3c7;
  --shadow-sm:0 2px 8px rgba(0,0,0,.08);
  --shadow-md:0 4px 20px rgba(0,0,0,.12);
  --shadow-lg:0 8px 40px rgba(0,0,0,.15);
  --radius:8px;
  --radius-lg:16px;
  --max-w:1280px;
  --max-w-wide:1440px;
  --header-h:76px;
}

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

/* ===== Header / Navigation ===== */
.header{
  position:fixed;top:0;left:0;right:0;height:var(--header-h);
  background:rgba(10,25,41,.96);
  backdrop-filter:blur(12px);-webkit-backdrop-filter:blur(12px);
  z-index:1000;box-shadow:0 2px 12px rgba(0,0,0,.15);
  transition:box-shadow .3s
}
.header.scrolled{box-shadow:0 4px 24px rgba(0,0,0,.25)}
.header-inner{max-width:var(--max-w);margin:0 auto;padding:0 24px;height:100%;display:flex;align-items:center;justify-content:space-between}
.logo{display:flex;align-items:center;gap:10px;text-decoration:none}
.logo-text{font-size:22px;font-weight:800;letter-spacing:1px;color:#fff}
.logo-text .accent{color:var(--c-teal-light)}
.logo-sub{font-size:11px;color:rgba(255,255,255,.6);margin-top:2px;letter-spacing:.5px}
.nav{display:flex;gap:32px;align-items:center}
.nav a{color:rgba(255,255,255,.85);font-size:15px;font-weight:500;position:relative;padding:6px 0}
.nav a::after{content:"";position:absolute;bottom:0;left:0;width:0;height:2px;background:var(--c-teal-light);transition:width .3s}
.nav a:hover::after,.nav a.active::after{width:100%}
.nav a:hover,.nav a.active{color:#fff}
.header-phone{
  display:flex;align-items:center;gap:8px;
  background:var(--c-blue);color:#fff;
  padding:8px 20px;border-radius:var(--radius);
  font-size:15px;font-weight:600;
  transition:background .25s,transform .25s
}
.header-phone:hover{background:var(--c-teal);transform:translateY(-1px)}
.header-phone svg{width:16px;height:16px;fill:currentColor}
.mobile-toggle{display:none;flex-direction:column;gap:4px;cursor:pointer;padding:8px}
.mobile-toggle span{width:24px;height:2px;background:#fff;transition:.3s}
.mobile-toggle.active span:nth-child(1){transform:translateY(6px) rotate(45deg)}
.mobile-toggle.active span:nth-child(2){opacity:0}
.mobile-toggle.active span:nth-child(3){transform:translateY(-6px) rotate(-45deg)}

/* ===== Phone Modal ===== */
.phone-modal{
  position:fixed;inset:0;background:rgba(0,0,0,.6);
  z-index:2000;display:none;align-items:center;justify-content:center;
  animation:fadeIn .25s
}
.phone-modal.active{display:flex}
.phone-modal-box{
  background:#fff;border-radius:var(--radius-lg);padding:40px;
  text-align:center;min-width:360px;box-shadow:var(--shadow-lg);
  animation:scaleIn .3s
}
.phone-modal-box h3{font-size:20px;color:var(--c-navy);margin-bottom:16px}
.phone-modal-box .phone-num{font-size:32px;font-weight:800;color:var(--c-blue);letter-spacing:2px;margin-bottom:8px}
.phone-modal-box .phone-time{font-size:13px;color:var(--c-text-muted);margin-bottom:24px}
.phone-modal-close{
  background:var(--c-bg);padding:8px 24px;border-radius:var(--radius);
  font-size:14px;color:var(--c-text-light)
}
.phone-modal-close:hover{background:#e8ebef}

@keyframes fadeIn{from{opacity:0}to{opacity:1}}
@keyframes scaleIn{from{opacity:0;transform:scale(.92)}to{opacity:1;transform:scale(1)}}
@keyframes slideUp{from{opacity:0;transform:translateY(30px)}to{opacity:1;transform:translateY(0)}}
@keyframes slideInLeft{from{opacity:0;transform:translateX(-30px)}to{opacity:1;transform:translateX(0)}}

/* ===== Hero Section ===== */
.hero{
  min-height:600px;
  background:linear-gradient(135deg,var(--c-navy) 0%,#102841 50%,#0d2235 100%);
  position:relative;padding:calc(var(--header-h) + 60px) 0 60px;
  overflow:hidden
}
.hero::before{
  content:"";position:absolute;top:0;left:0;right:0;bottom:0;
  background:
    radial-gradient(ellipse at 80% 20%,rgba(0,102,179,.15) 0%,transparent 50%),
    radial-gradient(ellipse at 20% 80%,rgba(0,160,160,.1) 0%,transparent 50%)
}
.hero-inner{position:relative;z-index:1;display:flex;flex-direction:column;align-items:center;text-align:center;gap:24px}
.hero-badge{
  display:inline-flex;align-items:center;gap:8px;
  background:rgba(0,160,160,.15);border:1px solid rgba(0,160,160,.3);
  padding:6px 16px;border-radius:50px;
  font-size:13px;color:#8fe0e0;letter-spacing:1px
}
.hero h1{
  font-size:42px;font-weight:800;color:#fff;line-height:1.35;
  max-width:900px;letter-spacing:1px
}
.hero h1 .highlight{color:var(--c-teal-light)}
.hero-desc{
  font-size:17px;color:rgba(255,255,255,.75);
  max-width:760px;line-height:1.8
}
.hero-stats{
  display:flex;gap:48px;margin-top:12px;flex-wrap:wrap;justify-content:center
}
.hero-stat{text-align:center}
.hero-stat .num{font-size:36px;font-weight:800;color:var(--c-teal-light);line-height:1}
.hero-stat .label{font-size:13px;color:rgba(255,255,255,.6);margin-top:6px}
.hero-certs{
  display:flex;gap:12px;flex-wrap:wrap;justify-content:center;margin-top:8px
}
.hero-cert{
  background:rgba(255,255,255,.08);border:1px solid rgba(255,255,255,.12);
  padding:6px 14px;border-radius:6px;font-size:12px;color:rgba(255,255,255,.7)
}
.hero-cta{display:flex;gap:16px;margin-top:8px}
.btn{
  display:inline-flex;align-items:center;gap:8px;
  padding:12px 32px;border-radius:var(--radius);
  font-size:15px;font-weight:600;cursor:pointer;transition:all .25s
}
.btn-primary{background:var(--c-blue);color:#fff}
.btn-primary:hover{background:var(--c-blue-light);transform:translateY(-2px);box-shadow:var(--shadow-md)}
.btn-outline{background:transparent;color:#fff;border:1px solid rgba(255,255,255,.3)}
.btn-outline:hover{background:rgba(255,255,255,.1);border-color:rgba(255,255,255,.5)}
.btn-teal{background:var(--c-teal);color:#fff}
.btn-teal:hover{background:var(--c-teal-light);transform:translateY(-2px);box-shadow:var(--shadow-md)}
.btn-ghost{background:rgba(255,255,255,.08);color:#fff;border:1px solid rgba(255,255,255,.2);backdrop-filter:blur(4px)}
.btn-ghost:hover{background:rgba(255,255,255,.15);border-color:rgba(255,255,255,.35)}

/* ===== Section Common ===== */
.section{padding:64px 0}
.section-alt{background:var(--c-bg)}
.section-header{text-align:center;margin-bottom:48px}
.section-header h2{font-size:32px;color:var(--c-navy);font-weight:800;letter-spacing:1px}
.section-header .subtitle{font-size:14px;color:var(--c-text-muted);text-transform:uppercase;letter-spacing:2px;margin-bottom:8px}
.section-header p{font-size:16px;color:var(--c-text-light);max-width:680px;margin:12px auto 0}

/* ===== Industry Solutions (Home) ===== */
.solutions-grid{
  display:grid;grid-template-columns:repeat(4,1fr);gap:24px
}
.solution-card{
  background:#fff;border:1px solid var(--c-border);border-radius:var(--radius-lg);
  overflow:hidden;transition:all .3s;cursor:pointer
}
.solution-card:hover{box-shadow:var(--shadow-lg);transform:translateY(-4px);border-color:transparent}
.solution-card-img{height:180px;background:var(--c-navy);position:relative;overflow:hidden}
.solution-card-img img{width:100%;height:100%;object-fit:cover;transition:transform .4s}
.solution-card:hover .solution-card-img img{transform:scale(1.08)}
.solution-card-body{padding:20px}
.solution-card-body h3{font-size:17px;color:var(--c-navy);margin-bottom:8px;font-weight:700}
.solution-card-body p{font-size:13px;color:var(--c-text-light);line-height:1.6;margin-bottom:12px}
.solution-card-link{font-size:13px;color:var(--c-blue);font-weight:600;display:inline-flex;align-items:center;gap:4px}
.solution-card-link::after{content:"→";transition:transform .25s}
.solution-card:hover .solution-card-link::after{transform:translateX(4px)}

/* ===== Product Cards (Home) ===== */
.products-grid{
  display:grid;grid-template-columns:repeat(3,1fr);gap:24px
}
.product-card{
  background:#fff;border:1px solid var(--c-border);border-radius:var(--radius-lg);
  overflow:hidden;transition:all .35s cubic-bezier(.4,0,.2,1);display:flex;flex-direction:column
}
.product-card:hover{box-shadow:0 12px 40px rgba(10,25,41,.12);transform:translateY(-4px);border-color:transparent}
.product-card-img{height:260px;background:linear-gradient(135deg,#f8fafc,#eef2f7);display:flex;align-items:center;justify-content:center;overflow:hidden;position:relative}
.product-card-img::before{
  content:'';position:absolute;top:0;left:0;right:0;height:4px;
  background:linear-gradient(90deg,var(--c-blue),var(--c-teal));z-index:1
}
.product-card-img img{max-height:100%;max-width:88%;object-fit:contain;transition:transform .5s}
.product-card:hover .product-card-img img{transform:scale(1.08)}
.product-card-body{padding:28px;flex:1;display:flex;flex-direction:column}
.product-card-series{
  display:inline-block;font-size:12px;font-weight:600;
  color:var(--c-teal);background:rgba(0,160,160,.08);
  padding:4px 12px;border-radius:4px;margin-bottom:12px;letter-spacing:.5px
}
.product-card-body h3{font-size:20px;color:var(--c-navy);margin-bottom:10px;font-weight:700;line-height:1.4}
.product-card:hover h3{color:var(--c-blue)}
.product-card-body .desc{font-size:14px;color:var(--c-text-light);line-height:1.75;flex:1;margin-bottom:18px}
.product-card-footer{display:flex;align-items:center;justify-content:space-between;margin-top:auto}
.product-card-link{font-size:14px;color:var(--c-blue);font-weight:600}
.product-card-link::after{content:" →";transition:margin-left .25s}
.product-card:hover .product-card-link::after{margin-left:4px}
.product-card-tags{display:flex;gap:6px;flex-wrap:wrap}
.product-tag{font-size:10px;color:var(--c-text-muted);background:var(--c-bg);padding:2px 6px;border-radius:3px}

/* ===== Advantages ===== */
.advantages-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:24px}
.advantage-card{
  text-align:center;padding:32px 20px;
  background:#fff;border:1px solid var(--c-border);border-radius:var(--radius-lg);
  transition:all .3s
}
.advantage-card:hover{box-shadow:var(--shadow-md);transform:translateY(-2px)}
.advantage-icon{
  width:64px;height:64px;margin:0 auto 16px;
  background:linear-gradient(135deg,var(--c-blue),var(--c-teal));
  border-radius:50%;display:flex;align-items:center;justify-content:center;
  font-size:28px;color:#fff
}
.advantage-card h3{font-size:16px;color:var(--c-navy);margin-bottom:8px;font-weight:700}
.advantage-card p{font-size:13px;color:var(--c-text-light);line-height:1.6}

/* ===== About Preview ===== */
.about-preview{display:grid;grid-template-columns:1fr 1fr;gap:48px;align-items:center}
.about-preview-text h2{font-size:30px;color:var(--c-navy);margin-bottom:16px;font-weight:800}
.about-preview-text p{font-size:15px;color:var(--c-text-light);line-height:1.8;margin-bottom:16px}
.about-preview-text ul{margin:16px 0 24px}
.about-preview-text li{padding:4px 0 4px 24px;position:relative;font-size:14px;color:var(--c-text)}
.about-preview-text li::before{content:"✓";position:absolute;left:0;color:var(--c-teal);font-weight:700}
.about-preview-img{border-radius:var(--radius-lg);overflow:hidden;box-shadow:var(--shadow-lg)}
.about-preview-img img{width:100%;height:400px;object-fit:cover}

/* ===== Certifications ===== */
.certs-grid{display:grid;grid-template-columns:repeat(8,1fr);gap:16px}
.cert-badge{
  background:#fff;border:1px solid var(--c-border);border-radius:var(--radius);
  padding:16px 8px;text-align:center;transition:all .3s
}
.cert-badge:hover{box-shadow:var(--shadow-sm);border-color:var(--c-teal)}
.cert-badge .cert-icon{font-size:24px;margin-bottom:6px}
.cert-badge .cert-name{font-size:12px;color:var(--c-text-light);font-weight:600}

/* ===== Application Fields ===== */
.applications-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:16px}
.app-field-card{
  background:#fff;border:1px solid var(--c-border);border-radius:var(--radius);
  padding:24px 16px;text-align:center;transition:all .3s;cursor:pointer
}
.app-field-card:hover{box-shadow:var(--shadow-md);transform:translateY(-2px);border-color:var(--c-teal)}
.app-field-icon{font-size:32px;margin-bottom:8px}
.app-field-card h3{font-size:14px;color:var(--c-navy);font-weight:600}

/* ===== News ===== */
.news-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:24px}
.news-card{
  background:#fff;border:1px solid var(--c-border);border-radius:var(--radius-lg);
  overflow:hidden;transition:all .3s;display:flex;flex-direction:column
}
.news-card:hover{box-shadow:var(--shadow-lg);transform:translateY(-4px)}
.news-card-img{height:160px;background:var(--c-navy);overflow:hidden;position:relative}
.news-card-img img{width:100%;height:100%;object-fit:cover;transition:transform .4s}
.news-card:hover .news-card-img img{transform:scale(1.08)}
.news-card-img .img-category-badge{
  position:absolute;top:10px;left:10px;
  font-size:11px;font-weight:600;color:#fff;
  padding:3px 10px;border-radius:20px;backdrop-filter:blur(6px);
  background:rgba(0,0,0,.45)
}
.news-card-img .img-category-badge.cat-agent{background:rgba(0,80,160,.75)}
.news-card-img .img-category-badge.cat-guide{background:rgba(0,160,160,.75)}
.news-card-img .img-category-badge.cat-tech{background:rgba(0,100,120,.75)}
.news-card-img .img-category-badge.cat-industry{background:rgba(200,80,0,.75)}
.news-card-img .img-category-badge.cat-case{background:rgba(0,140,100,.75)}
.news-card-img .img-category-badge.cat-product{background:rgba(100,60,180,.75)}
.news-card-img .img-category-badge.cat-company{background:rgba(180,40,90,.75)}
.news-card-body{padding:16px;flex:1;display:flex;flex-direction:column}
.news-card-body .date-cat{display:flex;align-items:center;gap:8px;margin-bottom:8px}
.news-card-body .date{font-size:12px;color:var(--c-text-muted)}
.news-card-body .category{
  font-size:11px;font-weight:600;
  padding:2px 8px;border-radius:4px
}
.news-card-body .category.cat-agent{color:var(--c-blue);background:rgba(0,80,160,.08)}
.news-card-body .category.cat-guide{color:var(--c-teal);background:rgba(0,160,160,.08)}
.news-card-body .category.cat-tech{color:#006a80;background:rgba(0,106,128,.08)}
.news-card-body .category.cat-industry{color:#c85000;background:rgba(200,80,0,.08)}
.news-card-body .category.cat-case{color:#008c64;background:rgba(0,140,100,.08)}
.news-card-body .category.cat-product{color:#643cb4;background:rgba(100,60,180,.08)}
.news-card-body .category.cat-company{color:#b4285a;background:rgba(180,40,90,.08)}
.news-date{font-size:12px;color:var(--c-text-muted);margin-bottom:6px}
.news-card-body h3{font-size:15px;color:var(--c-navy);margin-bottom:8px;font-weight:600;line-height:1.4;flex:1}
.news-card-body .summary{font-size:12px;color:var(--c-text-light);line-height:1.5;margin-bottom:8px}
.news-card-link{font-size:12px;color:var(--c-blue);font-weight:600}

/* ===== FAQ ===== */
.faq-list{max-width:800px;margin:0 auto}
.faq-item{
  border:1px solid var(--c-border);border-radius:var(--radius);
  margin-bottom:12px;overflow:hidden;transition:all .25s
}
.faq-item.active{border-color:var(--c-teal)}
.faq-q{
  padding:16px 20px;font-size:15px;color:var(--c-navy);font-weight:600;
  cursor:pointer;display:flex;justify-content:space-between;align-items:center;
  background:#fff;transition:background .25s
}
.faq-item.active .faq-q{background:rgba(0,160,160,.05)}
.faq-q::after{content:"+";font-size:20px;color:var(--c-teal);transition:transform .25s}
.faq-item.active .faq-q::after{transform:rotate(45deg)}
.faq-a{max-height:0;overflow:hidden;transition:max-height .35s ease,padding .35s ease;padding:0 20px}
.faq-item.active .faq-a{max-height:500px;padding:0 20px 16px}
.faq-a p{font-size:14px;color:var(--c-text-light);line-height:1.8}

/* ===== CTA Section ===== */
.cta-section{
  background:linear-gradient(135deg,var(--c-navy),#102841);
  padding:64px 0;text-align:center
}
.cta-section h2{font-size:30px;color:#fff;font-weight:800;margin-bottom:12px}
.cta-section p{font-size:16px;color:rgba(255,255,255,.7);margin-bottom:24px}

/* ===== Footer ===== */
.footer{background:var(--c-navy);color:rgba(255,255,255,.7);padding:56px 0 0}
.footer-grid{
  display:grid;grid-template-columns:2fr 1.5fr 1.5fr 1.5fr;gap:40px;
  margin-bottom:40px
}
.footer-brand .logo-text{margin-bottom:12px}
.footer-brand p{font-size:13px;line-height:1.8;margin-bottom:16px}
.footer-col h4{color:#fff;font-size:15px;font-weight:600;margin-bottom:16px;letter-spacing:.5px}
.footer-col ul li{margin-bottom:8px}
.footer-col ul li a{font-size:13px;color:rgba(255,255,255,.6);transition:color .25s}
.footer-col ul li a:hover{color:var(--c-teal-light)}
.footer-contact li{font-size:13px;color:rgba(255,255,255,.6);margin-bottom:10px;display:flex;align-items:flex-start;gap:8px}
.footer-contact li svg{width:14px;height:14px;fill:currentColor;flex-shrink:0;margin-top:3px}
.footer-bottom{
  border-top:1px solid rgba(255,255,255,.1);
  padding:20px 0;text-align:center
}
.footer-bottom p{font-size:12px;color:rgba(255,255,255,.4);line-height:1.6}
.footer-bottom .trademark{margin-top:6px;font-size:11px;color:rgba(255,255,255,.3)}

/* ===== Breadcrumb ===== */
.breadcrumb{
  padding:calc(var(--header-h) + 24px) 0 0;
  background:var(--c-bg)
}
.breadcrumb-inner{display:flex;align-items:center;gap:8px;padding:12px 0}
.breadcrumb a{font-size:13px;color:var(--c-text-muted)}
.breadcrumb a:hover{color:var(--c-blue)}
.breadcrumb span{font-size:13px;color:var(--c-text-muted)}
.breadcrumb .current{color:var(--c-navy);font-weight:600}

/* ===== Page Header ===== */
/* ===== Page Header (Wide Premium) ===== */
.page-header{
  background:linear-gradient(135deg,var(--c-navy) 0%,#0d3461 50%,#005050 100%);
  padding:calc(var(--header-h) + 64px) 0 56px;text-align:center;
  position:relative;overflow:hidden
}
.page-header::before{
  content:'';position:absolute;top:0;left:0;right:0;bottom:0;
  background:radial-gradient(ellipse at 30% 50%,rgba(0,160,160,.08) 0%,transparent 60%),
             radial-gradient(ellipse at 70% 50%,rgba(0,80,160,.08) 0%,transparent 60%);
  pointer-events:none
}
.page-header .container{position:relative;z-index:1;max-width:var(--max-w-wide)}
.page-header h1{font-size:40px;color:#fff;font-weight:800;letter-spacing:1px;margin-bottom:8px}
.page-header p{font-size:17px;color:rgba(255,255,255,.75);margin-top:10px}
.page-header .header-badge{
  display:inline-flex;align-items:center;gap:6px;
  background:rgba(255,255,255,.1);backdrop-filter:blur(8px);
  padding:6px 16px;border-radius:20px;font-size:13px;
  color:rgba(255,255,255,.85);margin-bottom:20px;
  border:1px solid rgba(255,255,255,.15)
}

/* ===== Products Page (Wide Premium) ===== */
.products-page{padding:56px 0}
.products-page .container{max-width:var(--max-w-wide)}

/* Left sidebar + content layout */
.products-layout{
  display:grid;grid-template-columns:280px 1fr;gap:40px;align-items:start
}

/* Sidebar — Premium */
.products-sidebar{
  position:sticky;top:calc(var(--header-h) + 16px);
  background:#fff;border:1px solid rgba(10,25,41,.07);border-radius:16px;
  box-shadow:0 1px 2px rgba(10,25,41,.04),0 18px 40px -20px rgba(10,25,41,.28);
  overflow:hidden;font-variant-numeric:tabular-nums
}
.products-sidebar::before{
  content:'';display:block;height:3px;
  background:linear-gradient(90deg,var(--c-navy) 0%,var(--c-blue) 52%,var(--c-teal) 100%)
}
.sidebar-section{padding:22px 20px}
.sidebar-section + .sidebar-section{border-top:1px solid rgba(10,25,41,.06)}
.sidebar-title{
  display:flex;align-items:center;gap:9px;
  font-size:11.5px;color:var(--c-navy);font-weight:800;
  letter-spacing:.18em;text-transform:uppercase;margin-bottom:14px
}
.sidebar-title::before{
  content:'';flex:0 0 auto;width:3px;height:12px;border-radius:2px;
  background:linear-gradient(180deg,var(--c-blue),var(--c-teal))
}
.sidebar-nav{list-style:none;padding:0;margin:0}
.sidebar-nav li{margin-bottom:3px}

.sidebar-link{
  position:relative;display:flex;align-items:center;justify-content:space-between;gap:10px;
  width:100%;padding:9px 13px;font-size:14px;color:var(--c-text-light);font-weight:500;
  background:none;border:none;border-radius:9px;cursor:pointer;text-align:left;text-decoration:none;
  transition:color .22s,background .22s,transform .22s,box-shadow .22s
}
.sidebar-link:hover{background:rgba(0,102,179,.06);color:var(--c-blue);transform:translateX(2px)}
.sidebar-link.active{
  background:linear-gradient(100deg,var(--c-navy) 0%,#123a63 100%);
  color:#fff;font-weight:700;transform:none;
  box-shadow:0 10px 22px -12px rgba(10,25,41,.9),inset 0 1px 0 rgba(255,255,255,.08)
}
.sidebar-link.active .filter-count{background:rgba(255,255,255,.16);color:#fff;border-color:transparent}

.filter-count{
  flex:0 0 auto;min-width:26px;text-align:center;
  font-size:11px;font-weight:700;color:var(--c-blue);
  background:rgba(0,102,179,.07);border:1px solid rgba(0,102,179,.12);
  padding:1px 8px;border-radius:999px;
  transition:background .22s,color .22s,border-color .22s
}
.sidebar-link:hover .filter-count{background:rgba(0,102,179,.12)}

.sidebar-group{margin-top:18px}
.sidebar-group-title{
  display:flex;align-items:center;gap:10px;
  font-size:13.5px;font-weight:700;color:var(--c-navy);
  padding:7px 10px;letter-spacing:.01em
}
.sidebar-group-title .group-icon{
  flex:0 0 auto;width:28px;height:28px;border-radius:9px;
  display:inline-flex;align-items:center;justify-content:center;
  background:linear-gradient(135deg,rgba(0,102,179,.10),rgba(0,160,160,.16));
  color:var(--c-blue);box-shadow:inset 0 0 0 1px rgba(0,102,179,.10)
}
.sidebar-group-title .group-icon svg{
  width:15px;height:15px;stroke:currentColor;fill:none;
  stroke-width:1.7;stroke-linecap:round;stroke-linejoin:round
}
.sidebar-group-title .group-count{
  margin-left:auto;font-size:11px;font-weight:700;
  background:var(--c-bg);color:var(--c-text-muted);
  padding:1px 9px;border-radius:999px
}
.sidebar-sub-nav{list-style:none;position:relative;margin:2px 0 0 23px;padding:3px 0 0 11px}
.sidebar-sub-nav::before{
  content:'';position:absolute;left:0;top:8px;bottom:8px;width:1px;
  background:linear-gradient(180deg,rgba(10,25,41,.16),rgba(10,25,41,.02))
}
.sidebar-sub-nav li{margin-bottom:2px}
.sidebar-sub-nav .sidebar-link{padding-left:11px;font-size:13.5px}
.sidebar-sub-nav .sidebar-link.active{
  background:rgba(0,102,179,.08);color:var(--c-navy);box-shadow:none
}
.sidebar-sub-nav .sidebar-link.active::before{
  content:'';position:absolute;left:-11px;top:50%;transform:translateY(-50%);
  width:2px;height:14px;border-radius:2px;
  background:linear-gradient(180deg,var(--c-blue),var(--c-teal))
}
.sidebar-sub-nav .sidebar-link.active .filter-count{
  background:rgba(0,102,179,.12);color:var(--c-blue)
}

/* 选型助手 — dark premium card */
.sidebar-section.sidebar-help{
  position:relative;overflow:hidden;text-align:center;padding:26px 20px;border-top:0;
  background:linear-gradient(155deg,var(--c-navy) 0%,#0e3160 55%,#075a5a 100%);
  color:#fff
}
.sidebar-help::after{
  content:'';position:absolute;inset:0;pointer-events:none;
  background:radial-gradient(circle at 82% 0%,rgba(26,184,184,.30),transparent 62%)
}
.sidebar-help > *{position:relative;z-index:1}
.sidebar-help .sidebar-title{justify-content:center;color:#fff;margin-bottom:10px}
.sidebar-help .sidebar-title::before{background:linear-gradient(180deg,#fff,rgba(255,255,255,.45))}
.sidebar-help-text{font-size:12.5px;color:rgba(255,255,255,.76);line-height:1.75;margin-bottom:16px}
.sidebar-help .btn-sm{
  display:inline-flex;align-items:center;justify-content:center;
  padding:10px 28px;font-size:13.5px;font-weight:700;border-radius:999px;
  background:#fff;color:var(--c-navy);margin-bottom:0;
  box-shadow:0 10px 24px -12px rgba(0,0,0,.75);
  transition:transform .22s,color .22s,box-shadow .22s
}
.sidebar-help .btn-sm:hover{transform:translateY(-1px);color:var(--c-blue);box-shadow:0 14px 28px -12px rgba(0,0,0,.8)}
.sidebar-phone{
  display:flex;align-items:center;justify-content:center;gap:8px;
  margin-top:16px;padding-top:14px;border-top:1px solid rgba(255,255,255,.16);
  font-size:16px;font-weight:800;color:#fff;letter-spacing:.03em;
  text-decoration:none;transition:color .22s
}
.sidebar-phone svg{width:15px;height:15px;fill:currentColor}
.sidebar-phone:hover{color:var(--c-teal-light)}

/* 快捷导航 — sliding chevron */
.sidebar-links .sidebar-link::after{
  content:'›';margin-left:auto;font-size:17px;line-height:1;color:var(--c-text-muted);
  transition:transform .22s,color .22s
}
.sidebar-links .sidebar-link:hover::after{transform:translateX(3px);color:var(--c-blue)}

/* Mobile filter toggle */
.mobile-filter-toggle{display:none}

/* Products content area */
.products-content{min-width:0}
.products-list-grid{
  display:grid;grid-template-columns:repeat(3,1fr);gap:28px
}
.products-list-grid .product-card-img{height:240px}
.product-group-header{
  grid-column:1/-1;margin:20px 0 12px;padding:24px 28px;
  background:linear-gradient(135deg,rgba(0,80,160,.04),rgba(0,160,160,.04));
  border-radius:var(--radius);border-left:4px solid var(--c-teal)
}
.product-group-header h3{font-size:24px;color:var(--c-navy);font-weight:700;margin-bottom:8px}
.product-group-header p{font-size:14px;color:var(--c-text-light);line-height:1.7}

.filter-btn:not(.active) .filter-count{
  background:var(--c-bg);color:var(--c-text-muted)
}

/* Product group headers */
.product-group-header{
  grid-column:1/-1;padding:24px 28px;margin:8px 0 24px;
  background:linear-gradient(135deg,rgba(0,80,160,.05),rgba(0,160,160,.05));
  border-radius:var(--radius-lg);border-left:4px solid var(--c-blue)
}
.product-group-header h3{
  font-size:22px;color:var(--c-navy);font-weight:700;margin-bottom:8px
}
.product-group-header p{
  font-size:14px;color:var(--c-text-light);line-height:1.7
}

/* Product lines overview (Wide Premium) */
.product-lines-overview{padding:80px 0;background:linear-gradient(180deg,var(--c-bg) 0%,#fff 100%)}
.product-lines-overview .container{max-width:var(--max-w-wide)}
.product-lines-grid{
  display:grid;grid-template-columns:repeat(4,1fr);gap:28px
}
.product-line-card{
  background:#fff;border-radius:var(--radius-lg);padding:48px 36px 40px;
  text-align:center;box-shadow:var(--shadow-sm);transition:all .4s cubic-bezier(.4,0,.2,1);
  cursor:pointer;position:relative;overflow:hidden;border-radius:16px;
  border:1px solid var(--c-border-light)
}
.product-line-card::before{
  content:'';position:absolute;top:0;left:0;right:0;height:4px;
  background:var(--card-accent,var(--c-teal));transition:height .3s
}
.product-line-card:hover{
  box-shadow:0 16px 48px rgba(10,25,41,.12);transform:translateY(-6px);
  border-color:transparent
}
.product-line-card:hover::before{
  height:6px
}
.product-line-card .line-icon{
  width:72px;height:72px;margin:0 auto 24px;
  display:flex;align-items:center;justify-content:center;
  border-radius:20px;
  background:var(--card-icon-bg,linear-gradient(135deg,var(--c-teal),var(--c-blue)));
  transition:transform .4s cubic-bezier(.4,0,.2,1)
}
.product-line-card:hover .line-icon{
  transform:scale(1.08)
}
.product-line-card .line-icon svg{
  width:36px;height:36px;fill:#fff
}
.product-line-card h3{
  font-size:22px;color:var(--c-navy);font-weight:700;margin-bottom:6px;
  letter-spacing:-.3px
}
.product-line-card .line-en{
  font-size:13px;color:var(--c-text-muted);margin-bottom:20px;
  font-style:italic;opacity:.7
}
.product-line-card .line-desc{
  font-size:14px;color:var(--c-text-light);line-height:1.85;
  margin-bottom:24px;text-align:center
}
.product-line-card .line-stats{
  display:flex;align-items:center;justify-content:center;gap:10px;
  margin-bottom:24px;padding:14px 20px;
  background:var(--c-bg);border-radius:10px
}
.product-line-card .line-stats strong{color:var(--c-navy);font-weight:800;font-size:22px}
.product-line-card .stat-sep{color:var(--c-border)}
.product-line-card .line-stats .stat{font-size:13px;color:var(--c-text-muted)}
.product-line-card .line-cta{
  display:inline-flex;align-items:center;gap:6px;
  font-size:14px;font-weight:600;color:var(--card-accent,var(--c-teal));
  transition:gap .3s
}
.product-line-card:hover .line-cta{
  gap:10px
}
.product-line-card .line-cta svg{
  width:16px;height:16px;fill:currentColor;transition:transform .3s
}
.product-line-card:hover .line-cta svg{
  transform:translateX(2px)
}

/* No products message */
.no-products{text-align:center;padding:48px 0}
.no-products p{font-size:16px;color:var(--c-text-muted)}

@media(max-width:768px){
  .product-lines-grid{grid-template-columns:1fr 1fr}
  /* Sidebar becomes off-canvas overlay on mobile */
  .products-layout{grid-template-columns:1fr;gap:0}
  .products-sidebar{
    position:fixed;top:var(--header-h);left:0;bottom:0;
    width:280px;z-index:999;transform:translateX(-100%);
    transition:transform .3s;overflow-y:auto;border-radius:0
  }
  .products-sidebar.mobile-open{transform:translateX(0);box-shadow:var(--shadow-lg)}
  .mobile-filter-toggle{
    display:block;width:100%;padding:12px 16px;margin-bottom:20px;
    background:var(--c-navy);color:#fff;border:none;border-radius:var(--radius);
    font-size:14px;font-weight:600;cursor:pointer;text-align:left
  }
  .products-list-grid{grid-template-columns:1fr 1fr;gap:16px}
  .products-list-grid .product-card-img{height:180px}
  .product-card-body{padding:16px}
  .product-card-body h3{font-size:15px}
  .product-card-body .desc{font-size:13px}
}
@media(max-width:480px){
  .product-lines-grid{grid-template-columns:1fr}
  .products-list-grid{grid-template-columns:1fr}
}

/* ===== Product Detail Page (Wide Premium) ===== */
.product-detail{padding:0 0 56px}
.product-detail .container{max-width:var(--max-w-wide)}
.product-detail-sections .container,
.product-detail-sections{max-width:var(--max-w-wide);margin:0 auto}
.product-features-section .container,
.product-specs-section .container,
.product-advantages-section .container,
.product-apps-section .container,
.product-faq-section .container,
.product-cta-section .container,
.product-related-section .container,
.product-selection-section .container{max-width:var(--max-w-wide)}

/* Full-width hero section */
.product-hero{
  background:linear-gradient(135deg,var(--c-navy) 0%,#0d3461 50%,#003840 100%);
  padding:calc(var(--header-h) + 40px) 0 48px;position:relative;overflow:hidden
}
.product-hero::before{
  content:'';position:absolute;top:0;left:0;right:0;bottom:0;
  background:radial-gradient(ellipse at 25% 40%,rgba(0,160,160,.1) 0%,transparent 50%),
             radial-gradient(ellipse at 75% 60%,rgba(0,80,160,.1) 0%,transparent 50%);
  pointer-events:none
}
.product-hero .container{position:relative;z-index:1;max-width:var(--max-w-wide)}
.product-hero-grid{
  display:grid;grid-template-columns:1fr 1fr;gap:48px;align-items:center
}
.product-hero-img{
  background:rgba(255,255,255,.05);border-radius:var(--radius-lg);
  padding:40px;display:flex;align-items:center;justify-content:center;
  min-height:400px;border:1px solid rgba(255,255,255,.1)
}
.product-hero-img img{max-width:100%;max-height:400px;object-fit:contain;filter:drop-shadow(0 8px 24px rgba(0,0,0,.3))}
.product-hero-info .series-tag{
  display:inline-block;font-size:13px;font-weight:600;
  color:var(--c-teal-light);background:rgba(0,160,160,.15);
  padding:5px 14px;border-radius:6px;margin-bottom:16px;letter-spacing:.5px
}
.product-hero-info h1{font-size:34px;color:#fff;font-weight:800;margin-bottom:12px;line-height:1.4}
.product-hero-info .summary{font-size:16px;color:rgba(255,255,255,.7);line-height:1.8;margin-bottom:24px}
.product-hero-meta{
  display:flex;gap:24px;margin-bottom:24px;flex-wrap:wrap
}
.product-hero-meta-item{
  background:rgba(255,255,255,.06);border:1px solid rgba(255,255,255,.1);
  padding:12px 20px;border-radius:var(--radius)
}
.product-hero-meta-item .label{font-size:12px;color:rgba(255,255,255,.5);text-transform:uppercase;letter-spacing:.5px;margin-bottom:4px}
.product-hero-meta-item .value{font-size:16px;color:#fff;font-weight:600}
.product-detail-actions{display:flex;gap:12px;margin-top:8px;flex-wrap:wrap}

/* Product sections */
.product-detail-section{margin-bottom:48px}
.product-detail-section h2{
  font-size:24px;color:var(--c-navy);font-weight:700;
  border-left:4px solid var(--c-teal);padding-left:14px;margin-bottom:20px;line-height:1.4
}
.spec-table{width:100%;border-collapse:collapse;border-radius:var(--radius-lg);overflow:hidden;box-shadow:var(--shadow-sm)}
.spec-table th,.spec-table td{
  padding:14px 20px;border-bottom:1px solid var(--c-border);font-size:14px;text-align:left
}
.spec-table th{background:linear-gradient(90deg,#f8fafc,#eef2f7);color:var(--c-navy);font-weight:600;width:30%}
.spec-table tr:last-child td{border-bottom:none}
.spec-table tr:hover td{background:rgba(0,160,160,.03)}
.product-gallery{display:grid;grid-template-columns:repeat(4,1fr);gap:16px;margin-top:20px}
.product-gallery-item{
  background:linear-gradient(135deg,#f8fafc,#eef2f7);border-radius:var(--radius);
  padding:16px;text-align:center;cursor:pointer;transition:all .25s;
  border:1px solid var(--c-border)
}
.product-gallery-item:hover{box-shadow:var(--shadow-md);transform:translateY(-2px)}
.product-gallery-item img{max-height:140px;object-fit:contain;margin:0 auto 8px}
.product-gallery-item .name{font-size:12px;color:var(--c-text-muted)}
.product-nav{
  display:flex;justify-content:space-between;align-items:center;
  border-top:1px solid var(--c-border);padding-top:28px;margin-top:40px
}
.product-nav a{font-size:14px;color:var(--c-blue);font-weight:600}

/* ===== Product Detail v3 Sections ===== */
.section-title{
  font-size:22px;color:var(--c-navy);font-weight:700;
  border-left:4px solid var(--c-teal);padding-left:12px;margin-bottom:24px
}

/* Product Overview */
.product-overview-section{padding:40px 0}
.product-overview{max-width:900px;margin:0 auto}
.product-overview p{font-size:15px;color:var(--c-text);line-height:1.9;margin-bottom:16px}

/* Tag badges */
.tag-list{display:flex;flex-wrap:wrap;gap:6px;margin-bottom:16px}
.tag-badge{
  display:inline-block;padding:3px 10px;font-size:12px;
  background:rgba(0,160,160,.08);color:var(--c-teal);
  border-radius:12px;font-weight:500
}

/* Image Gallery */
.product-gallery{margin-top:16px}
.gallery-main{
  background:var(--c-bg);border-radius:var(--radius);overflow:hidden;
  margin-bottom:8px;height:100px;display:none
}
.gallery-main img{max-width:100%;max-height:100px;object-fit:contain;margin:0 auto;display:block}
.gallery-thumbs{display:flex;gap:8px;overflow-x:auto}
.gallery-thumb{
  flex-shrink:0;width:60px;height:60px;border-radius:6px;overflow:hidden;
  cursor:pointer;border:2px solid transparent;transition:border-color .25s
}
.gallery-thumb.active,.gallery-thumb:hover{border-color:var(--c-teal)}
.gallery-thumb img{width:100%;height:100%;object-fit:contain;background:var(--c-bg)}

/* Advantages */
.product-advantages-section{padding:40px 0}
.advantage-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:20px}
.advantage-card{
  background:#fff;border-radius:var(--radius);padding:24px;
  box-shadow:var(--shadow-sm);transition:all .25s;border-top:3px solid var(--c-blue)
}
.advantage-card:hover{box-shadow:var(--shadow-md);transform:translateY(-2px)}
.advantage-card h4{font-size:16px;color:var(--c-navy);font-weight:700;margin-bottom:10px}
.advantage-card p{font-size:13px;color:var(--c-text-light);line-height:1.7}

/* Selection Guide */
.product-guide-section{padding:40px 0;background:var(--c-bg)}
.guide-list{max-width:900px;margin:0 auto}
.guide-step{
  background:#fff;border-radius:var(--radius);padding:20px 24px;
  margin-bottom:12px;box-shadow:var(--shadow-sm);position:relative;padding-left:56px
}
.guide-step h4{font-size:15px;color:var(--c-navy);font-weight:700;margin-bottom:8px}
.guide-step p{font-size:14px;color:var(--c-text-light);line-height:1.7}
.guide-step::before{
  content:counter(guide-step);counter-increment:guide-step;
  position:absolute;left:16px;top:20px;width:28px;height:28px;
  background:linear-gradient(135deg,var(--c-blue),var(--c-teal));color:#fff;
  border-radius:50%;display:flex;align-items:center;justify-content:center;
  font-size:14px;font-weight:700
}
.guide-list{counter-reset:guide-step}

/* Features */
.product-features-section{padding:40px 0;background:var(--c-bg)}
.features-grid{max-width:900px;margin:0 auto}
.features-list{list-style:none;padding:0;display:grid;grid-template-columns:1fr 1fr;gap:16px}
.features-list li{
  padding:16px 20px;background:#fff;border-radius:var(--radius);
  font-size:14px;color:var(--c-text);line-height:1.6;position:relative;padding-left:44px;
  box-shadow:var(--shadow-sm);transition:box-shadow .25s
}
.features-list li:hover{box-shadow:var(--shadow-md)}
.features-list li::before{
  content:"✓";position:absolute;left:16px;top:14px;
  width:20px;height:20px;background:var(--c-teal);color:#fff;
  border-radius:50%;display:flex;align-items:center;justify-content:center;
  font-size:12px;font-weight:700
}
.product-specs-section{padding:40px 0}
.specs-wrap{max-width:800px;margin:0 auto;overflow-x:auto}
.specs-note{font-size:13px;color:var(--c-text-muted);font-style:italic;margin-top:12px;text-align:center}
.product-apps-section{padding:40px 0;background:var(--c-bg)}
.app-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:20px}
.app-card{
  background:#fff;border-radius:var(--radius);padding:24px;
  box-shadow:var(--shadow-sm);transition:all .25s;border-top:3px solid var(--c-teal)
}
.app-card:hover{box-shadow:var(--shadow-md);transform:translateY(-2px)}
.app-card h4{font-size:16px;color:var(--c-navy);font-weight:700;margin-bottom:10px}
.app-card p{font-size:14px;color:var(--c-text-light);line-height:1.7}
.product-faq-section{padding:40px 0}
.product-related-section{padding:40px 0;background:var(--c-bg)}
.related-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:16px}
.related-card{
  display:block;background:#fff;border-radius:var(--radius);overflow:hidden;
  box-shadow:var(--shadow-sm);transition:all .25s;text-decoration:none
}
.related-card:hover{box-shadow:var(--shadow-md);transform:translateY(-3px)}
.related-img{height:140px;background:var(--c-bg);display:flex;align-items:center;justify-content:center}
.related-img img{max-width:90%;max-height:130px;object-fit:contain}
.related-info{padding:14px 16px}
.related-brand{font-size:11px;color:var(--c-teal);font-weight:600;text-transform:uppercase;letter-spacing:.5px}
.related-info h4{font-size:14px;color:var(--c-navy);font-weight:600;margin:6px 0 4px}
.related-info p{font-size:12px;color:var(--c-text-muted);line-height:1.5;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.product-nav-section{padding:32px 0}
.product-nav-section .product-nav{
  display:grid;grid-template-columns:1fr auto 1fr;gap:16px;
  border-top:1px solid var(--c-border);padding-top:24px
}
.product-nav-item{
  display:flex;flex-direction:column;gap:4px;text-decoration:none;transition:all .25s
}
.product-nav-item.next{text-align:right}
.product-nav-item.back{text-align:center}
.product-nav-label{font-size:12px;color:var(--c-text-muted)}
.product-nav-name{font-size:14px;color:var(--c-navy);font-weight:600}
.product-nav-item:hover .product-nav-name{color:var(--c-teal)}
@media(max-width:768px){
  .features-list{grid-template-columns:1fr}
  .app-grid{grid-template-columns:1fr}
  .advantage-grid{grid-template-columns:1fr}
  .related-grid{grid-template-columns:repeat(2,1fr)}
  .product-nav-section .product-nav{grid-template-columns:1fr;gap:12px}
  .product-nav-item.next{text-align:left}
  .gallery-thumb{width:48px;height:48px}
}

/* ===== Brand Page ===== */
.brand-section{padding:48px 0}
.brand-section h2{font-size:24px;color:var(--c-navy);font-weight:800;margin-bottom:16px}
.brand-section p{font-size:15px;color:var(--c-text);line-height:1.8;margin-bottom:16px}
.brand-timeline{position:relative;padding-left:32px;margin:32px 0}
.brand-timeline::before{
  content:"";position:absolute;left:8px;top:0;bottom:0;
  width:2px;background:linear-gradient(var(--c-blue),var(--c-teal))
}
.timeline-item{position:relative;padding-bottom:24px}
.timeline-item::before{
  content:"";position:absolute;left:-28px;top:4px;
  width:16px;height:16px;border-radius:50%;
  background:var(--c-teal);border:3px solid #fff;box-shadow:0 0 0 2px var(--c-teal)
}
.timeline-year{font-size:16px;font-weight:800;color:var(--c-blue);margin-bottom:4px}
.timeline-event{font-size:14px;color:var(--c-text-light);line-height:1.6}

/* ===== News Page ===== */
.news-page{padding:56px 0}

/* News category filter tabs */
.news-filter-tabs{
  display:flex;gap:8px;flex-wrap:wrap;margin-bottom:36px;
  padding:12px;background:#fff;border-radius:var(--radius-lg);
  box-shadow:var(--shadow-sm);border:1px solid var(--c-border)
}
.news-tab{
  padding:8px 18px;font-size:14px;font-weight:600;cursor:pointer;
  border-radius:var(--radius);transition:all .25s;color:var(--c-text-light);
  background:transparent;border:1px solid transparent
}
.news-tab:hover{background:var(--c-bg);color:var(--c-navy)}
.news-tab.active{
  background:linear-gradient(135deg,var(--c-blue),var(--c-teal));
  color:#fff;box-shadow:0 2px 8px rgba(0,80,160,.25)
}
.news-tab .tab-count{
  font-size:11px;opacity:.7;margin-left:4px
}

/* News list - premium card style */
.news-list{display:flex;flex-direction:column;gap:24px}
.news-list-item{
  display:grid;grid-template-columns:280px 1fr;gap:0;
  background:#fff;border:1px solid var(--c-border);border-radius:var(--radius-lg);
  overflow:hidden;transition:all .35s cubic-bezier(.4,0,.2,1)
}
.news-list-item:hover{
  box-shadow:0 8px 30px rgba(10,25,41,.12);transform:translateY(-3px);
  border-color:transparent
}
.news-list-item-img{
  height:200px;overflow:hidden;position:relative
}
.news-list-item-img img{width:100%;height:100%;object-fit:cover;transition:transform .5s}
.news-list-item:hover .news-list-item-img img{transform:scale(1.05)}
.news-list-item-img .img-category-badge{
  position:absolute;top:12px;left:12px;
  font-size:12px;font-weight:600;color:#fff;
  padding:4px 12px;border-radius:20px;backdrop-filter:blur(8px);
  background:rgba(0,0,0,.45)
}
.news-list-item-img .img-category-badge.cat-agent{background:rgba(0,80,160,.75)}
.news-list-item-img .img-category-badge.cat-guide{background:rgba(0,160,160,.75)}
.news-list-item-img .img-category-badge.cat-tech{background:rgba(0,100,120,.75)}
.news-list-item-img .img-category-badge.cat-industry{background:rgba(200,80,0,.75)}
.news-list-item-img .img-category-badge.cat-case{background:rgba(0,140,100,.75)}
.news-list-item-img .img-category-badge.cat-product{background:rgba(100,60,180,.75)}
.news-list-item-img .img-category-badge.cat-company{background:rgba(180,40,90,.75)}

.news-list-item-body{padding:24px 28px;display:flex;flex-direction:column}
.news-list-item-body .date-cat{display:flex;align-items:center;gap:10px;margin-bottom:10px}
.news-list-item-body .date{font-size:13px;color:var(--c-text-muted)}
.news-list-item-body .category{
  font-size:12px;font-weight:600;letter-spacing:.3px;
  padding:3px 10px;border-radius:4px
}
.news-list-item-body .category.cat-agent{color:var(--c-blue);background:rgba(0,80,160,.08)}
.news-list-item-body .category.cat-guide{color:var(--c-teal);background:rgba(0,160,160,.08)}
.news-list-item-body .category.cat-tech{color:#006a80;background:rgba(0,106,128,.08)}
.news-list-item-body .category.cat-industry{color:#c85000;background:rgba(200,80,0,.08)}
.news-list-item-body .category.cat-case{color:#008c64;background:rgba(0,140,100,.08)}
.news-list-item-body .category.cat-product{color:#643cb4;background:rgba(100,60,180,.08)}
.news-list-item-body .category.cat-company{color:#b4285a;background:rgba(180,40,90,.08)}
.news-list-item-body h3{
  font-size:18px;color:var(--c-navy);margin-bottom:10px;font-weight:700;
  line-height:1.45;flex:1
}
.news-list-item:hover h3{color:var(--c-blue)}
.news-list-item-body .summary{font-size:14px;color:var(--c-text-light);line-height:1.7;margin-bottom:14px}
.news-list-item-body .read-more{
  font-size:14px;font-weight:600;color:var(--c-blue);
  display:inline-flex;align-items:center;gap:4px
}
.news-list-item-body .read-more::after{content:"→";transition:transform .25s}
.news-list-item:hover .read-more::after{transform:translateX(4px)}

/* News section header within news page */
.news-section-divider{
  display:flex;align-items:center;gap:16px;margin:40px 0 24px
}
.news-section-divider .line{flex:1;height:1px;background:var(--c-border)}
.news-section-divider h2{
  font-size:20px;color:var(--c-navy);font-weight:700;white-space:nowrap
}

/* ===== News Article Detail ===== */
.news-article{padding:0 0 56px}
.news-article-breadcrumb{
  font-size:13px;color:var(--c-text-muted);padding:16px 0;
  display:flex;align-items:center;gap:8px
}
.news-article-breadcrumb a{color:var(--c-text-light);transition:color .2s}
.news-article-breadcrumb a:hover{color:var(--c-blue)}
.news-article-breadcrumb .current{color:var(--c-navy);font-weight:600}
.news-article-breadcrumb span{color:var(--c-text-muted)}

.news-article-header{
  text-align:center;padding:32px 0 36px;
  border-bottom:1px solid var(--c-border);margin-bottom:32px
}
.news-article-header .news-article-meta{
  display:flex;align-items:center;justify-content:center;gap:12px;
  margin-bottom:16px
}
.news-article-header .news-article-meta .date{
  font-size:14px;color:var(--c-text-muted)
}
.news-article-header .news-article-meta .category{
  font-size:13px;font-weight:600;padding:4px 12px;border-radius:4px
}
.news-article-header .news-article-meta .category.cat-agent{color:var(--c-blue);background:rgba(0,80,160,.08)}
.news-article-header .news-article-meta .category.cat-guide{color:var(--c-teal);background:rgba(0,160,160,.08)}
.news-article-header .news-article-meta .category.cat-tech{color:#006a80;background:rgba(0,106,128,.08)}
.news-article-header .news-article-meta .category.cat-industry{color:#c85000;background:rgba(200,80,0,.08)}
.news-article-header .news-article-meta .category.cat-case{color:#008c64;background:rgba(0,140,100,.08)}
.news-article-header .news-article-meta .category.cat-product{color:#643cb4;background:rgba(100,60,180,.08)}
.news-article-header .news-article-meta .category.cat-company{color:#b4285a;background:rgba(180,40,90,.08)}
.news-article-header h1{
  font-size:30px;color:var(--c-navy);font-weight:800;
  line-height:1.5;margin-bottom:16px;max-width:800px;margin-left:auto;margin-right:auto
}
.news-article-header .news-article-summary{
  font-size:16px;color:var(--c-text-light);line-height:1.7;
  max-width:700px;margin:0 auto
}

.news-article-img{
  border-radius:var(--radius-lg);overflow:hidden;margin-bottom:36px;
  box-shadow:0 4px 20px rgba(10,25,41,.08)
}
.news-article-img img{width:100%;display:block}

.news-article-content{
  max-width:800px;margin:0 auto;
  font-size:16px;line-height:1.95;color:var(--c-text)
}
.news-article-content h2{
  font-size:22px;color:var(--c-navy);font-weight:700;
  margin:36px 0 16px;padding-bottom:8px;
  border-bottom:2px solid var(--c-blue);border-image:linear-gradient(90deg,var(--c-blue),transparent) 1
}
.news-article-content h3{
  font-size:18px;color:var(--c-navy);font-weight:600;
  margin:24px 0 12px
}
.news-article-content p{margin-bottom:18px}
.news-article-content strong{color:var(--c-navy);font-weight:700}

/* Article CTA box */
.news-article-cta{max-width:800px;margin:40px auto 0}
.news-article-cta-box{
  background:linear-gradient(135deg,rgba(0,80,160,.04),rgba(0,160,160,.04));
  border:1px solid rgba(0,80,160,.12);border-radius:var(--radius-lg);
  padding:32px;text-align:center
}
.news-article-cta-box h3{font-size:20px;color:var(--c-navy);font-weight:700;margin-bottom:8px}
.news-article-cta-box p{font-size:14px;color:var(--c-text-light);margin-bottom:20px;line-height:1.7}

/* Article navigation */
.news-article-nav{
  display:flex;align-items:center;justify-content:space-between;
  max-width:800px;margin:36px auto 0;padding-top:24px;
  border-top:1px solid var(--c-border)
}

/* Old news-detail compatibility */
.news-detail{padding:48px 0;max-width:900px;margin:0 auto}
.news-detail h1{font-size:28px;color:var(--c-navy);font-weight:800;margin-bottom:12px;line-height:1.4}
.news-detail .meta{font-size:13px;color:var(--c-text-muted);margin-bottom:24px;padding-bottom:16px;border-bottom:1px solid var(--c-border)}
.news-detail .featured-img{border-radius:var(--radius-lg);overflow:hidden;margin-bottom:24px}
.news-detail .featured-img img{width:100%;max-height:400px;object-fit:cover}
.news-detail .content{font-size:15px;line-height:1.9;color:var(--c-text)}
.news-detail .content h2{font-size:22px;color:var(--c-navy);margin:24px 0 12px;font-weight:700}
.news-detail .content h3{font-size:18px;color:var(--c-navy);margin:20px 0 8px;font-weight:600}
.news-detail .content p{margin-bottom:16px}
.news-detail .content ul{padding-left:20px;margin-bottom:16px}
.news-detail .content li{list-style:disc;padding:4px 0}
.news-detail .content strong{color:var(--c-navy)}

/* ===== About Page ===== */
.about-page{padding:48px 0}
.about-content{max-width:900px;margin:0 auto}
.about-content h2{font-size:24px;color:var(--c-navy);font-weight:800;margin:32px 0 16px}
.about-content p{font-size:15px;color:var(--c-text);line-height:1.8;margin-bottom:16px}
.about-facts{
  display:grid;grid-template-columns:repeat(4,1fr);gap:24px;margin:32px 0
}
.about-fact{
  text-align:center;padding:24px 16px;
  background:var(--c-bg);border-radius:var(--radius-lg)
}
.about-fact .num{font-size:32px;font-weight:800;color:var(--c-blue)}
.about-fact .label{font-size:13px;color:var(--c-text-light);margin-top:4px}

/* ===== Contact Page ===== */
.contact-page{padding:48px 0}
.contact-grid{display:grid;grid-template-columns:1fr 1fr;gap:48px}
.contact-info h2{font-size:24px;color:var(--c-navy);font-weight:800;margin-bottom:16px}
.contact-info p{font-size:15px;color:var(--c-text-light);line-height:1.8;margin-bottom:24px}
.contact-info-list li{
  display:flex;align-items:flex-start;gap:12px;padding:12px 0;
  border-bottom:1px solid var(--c-border)
}
.contact-info-list .icon{
  width:36px;height:36px;border-radius:50%;
  background:linear-gradient(135deg,var(--c-blue),var(--c-teal));
  display:flex;align-items:center;justify-content:center;
  color:#fff;flex-shrink:0;font-size:16px
}
.contact-info-list .text{font-size:14px}
.contact-info-list .text .label{color:var(--c-text-muted);font-size:12px;margin-bottom:2px}
.contact-info-list .text .value{color:var(--c-navy);font-weight:600}
.contact-form{background:var(--c-bg);padding:32px;border-radius:var(--radius-lg)}
.contact-form h2{font-size:20px;color:var(--c-navy);margin-bottom:20px;font-weight:700}
.form-group{margin-bottom:16px}
.form-group label{display:block;font-size:13px;color:var(--c-text);margin-bottom:6px;font-weight:600}
.form-group input,.form-group textarea,.form-group select{
  width:100%;padding:10px 14px;border:1px solid var(--c-border);
  border-radius:var(--radius);font-size:14px;transition:border-color .25s
}
.form-group input:focus,.form-group textarea:focus,.form-group select:focus{
  border-color:var(--c-teal)
}
.form-group textarea{min-height:100px;resize:vertical}
.form-row{display:grid;grid-template-columns:1fr 1fr;gap:16px}

/* ===== Applications Page ===== */
.applications-page{padding:48px 0}
.app-sector-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.app-sector-card{
  background:#fff;border:1px solid var(--c-border);border-radius:var(--radius-lg);
  overflow:hidden;transition:all .3s
}
.app-sector-card:hover{box-shadow:var(--shadow-lg);transform:translateY(-4px)}
.app-sector-card-header{
  background:linear-gradient(135deg,var(--c-navy),#142b47);
  padding:24px;color:#fff;position:relative
}
.app-sector-card-header h3{font-size:18px;font-weight:700}
.app-sector-card-header .en{font-size:12px;color:rgba(255,255,255,.5);margin-top:4px}
.app-sector-card-body{padding:20px}
.app-sector-card-body p{font-size:13px;color:var(--c-text-light);line-height:1.6;margin-bottom:12px}
.app-sector-products{margin-bottom:12px}
.app-sector-products .label{font-size:12px;color:var(--c-text-muted);margin-bottom:4px}
.app-sector-products li{font-size:12px;color:var(--c-blue);padding:2px 0}
.app-sector-apps{display:flex;flex-wrap:wrap;gap:6px}
.app-sector-apps li{font-size:11px;background:var(--c-bg);padding:2px 8px;border-radius:3px;color:var(--c-text-light)}

/* ===== Mobile Nav Active ===== */
.nav.mobile-active{
  display:flex;position:fixed;top:var(--header-h);left:0;right:0;
  flex-direction:column;background:var(--c-navy);padding:24px;gap:16px;
  z-index:999;max-height:calc(100vh - var(--header-h));overflow-y:auto;
  box-shadow:0 4px 24px rgba(0,0,0,.3)
}
.nav.mobile-active a{font-size:16px;padding:8px 0;border-bottom:1px solid rgba(255,255,255,.08)}

/* ===== Responsive ===== */
@media(max-width:1024px){
  .solutions-grid,.advantages-grid{grid-template-columns:repeat(2,1fr)}
  .products-list-grid{grid-template-columns:repeat(3,1fr)}
  .news-grid{grid-template-columns:repeat(2,1fr)}
  .certs-grid{grid-template-columns:repeat(4,1fr)}
  .applications-grid{grid-template-columns:repeat(2,1fr)}
  .footer-grid{grid-template-columns:1fr 1fr}
}
@media(max-width:768px){
  .nav,.header-phone{display:none}
  .mobile-toggle{display:flex}
  .hero h1{font-size:28px}
  .hero-stats{gap:24px}
  .hero-stat .num{font-size:28px}
  .products-grid,.solutions-grid,.advantages-grid,.news-grid,
  .products-list-grid,.certs-grid,.applications-grid,
  .app-sector-grid,.about-facts,.app-field-card,
  .applications-grid{grid-template-columns:1fr 1fr}
  .about-preview,.product-detail-top,.contact-grid{grid-template-columns:1fr}
  .news-list-item{grid-template-columns:140px 1fr}
  .news-list-item-img{height:120px}
  .news-list-item-body{padding:12px 16px 12px 0}
  .news-list-item-body h3{font-size:15px}
  .news-list-item-body .summary{font-size:13px;-webkit-line-clamp:2;display:-webkit-box;-webkit-box-orient:vertical;overflow:hidden}
  .news-article-header h1{font-size:22px}
  .news-article-content{font-size:15px;line-height:1.85}
  .news-article-content h2{font-size:19px}
  .form-row{grid-template-columns:1fr}
  .section-header h2{font-size:26px}
  .footer-grid{grid-template-columns:1fr}
  .product-gallery{grid-template-columns:repeat(2,1fr)}
  .app-sector-grid{grid-template-columns:1fr}
}
@media(max-width:480px){
  .hero h1{font-size:24px}
  .products-grid,.solutions-grid,.advantages-grid,.news-grid,
  .products-list-grid,.certs-grid,.app-field-card,
  .applications-grid{grid-template-columns:1fr}
  .hero-cta{flex-direction:column;width:100%}
  .hero-cta .btn{width:100%;justify-content:center}
  .section-header h2{font-size:22px}
  .news-list-item{grid-template-columns:1fr}
  .news-list-item-img{height:180px}
}

/* ===== Product Detail Mobile Optimization ===== */
@media(max-width:768px){
  .product-hero{padding:calc(var(--header-h) + 24px) 0 32px}
  .product-hero-grid{grid-template-columns:1fr;gap:24px}
  .product-hero-img{min-height:200px;padding:24px;order:-1}
  .product-hero-img img{max-height:200px}
  .product-hero-info h1{font-size:22px}
  .product-hero-info .summary{font-size:14px;line-height:1.7}
  .product-hero-meta{gap:12px}
  .product-hero-meta-item{padding:10px 14px;flex:1;min-width:calc(50% - 6px)}
  .product-hero-meta-item .value{font-size:14px}
  .product-detail-actions{flex-direction:column}
  .product-detail-actions .btn{width:100%;justify-content:center}
  .product-detail-section{margin-bottom:32px}
  .product-detail-section h2{font-size:18px;padding-left:10px}
  .section-title{font-size:18px;padding-left:10px;margin-bottom:16px}
  .product-overview-section,.product-features-section,.product-advantages-section,
  .product-guide-section,.product-specs-section,.product-apps-section,
  .product-faq-section,.product-related-section{padding:24px 0}
  .spec-table th,.spec-table td{padding:10px 12px;font-size:13px}
  .spec-table th{width:35%}
  .specs-wrap{overflow-x:auto;-webkit-overflow-scrolling:touch}
  .guide-step{padding:16px 16px 16px 48px}
  .guide-step::before{left:12px;top:14px;width:24px;height:24px;font-size:12px}
  .guide-step h4{font-size:14px}
  .guide-step p{font-size:13px}
  .tag-badge{font-size:11px;padding:2px 8px}
  .product-gallery{grid-template-columns:repeat(3,1fr);gap:10px}
  .product-gallery-item{padding:10px}
  .product-gallery-item img{max-height:80px}
  .related-grid{grid-template-columns:repeat(2,1fr);gap:12px}
  .related-img{height:100px}
  .related-info{padding:10px 12px}
  .related-info h4{font-size:13px}
  .product-nav-section{padding:20px 0}
  .product-nav-section .product-nav{gap:10px;padding-top:16px}
  .product-nav-name{font-size:13px}
}
@media(max-width:480px){
  .product-hero-info h1{font-size:20px}
  .product-hero-meta-item{min-width:100%}
  .product-gallery{grid-template-columns:repeat(2,1fr)}
  .related-grid{grid-template-columns:1fr}
}