/* 苏州硕展环保科技有限公司 - 专业防腐风机制造商 */

:root {
  --blue: #004ea2; --blue-dark: #003a7a; --blue-light: #e8f0fa;
  --red: #cb0709; --gray-bg: #f5f6f8; --gray-border: #e0e0e0; --gray-text: #666; --gray-light: #999;
  --white: #fff; --text: #333; --text-dark: #222; --black: #111;
  --max: 1200px; --radius: 8px; --shadow: 0 2px 24px rgba(0,0,0,.08);
  --font: -apple-system,BlinkMacSystemFont,"Microsoft YaHei","PingFang SC","Helvetica Neue",Arial,sans-serif;
  --transition: all .3s cubic-bezier(.4,0,.2,1);
}
*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
body{font-family:var(--font);color:var(--text);line-height:1.75;background:var(--white);-webkit-font-smoothing:antialiased}
a{color:inherit;text-decoration:none;transition:var(--transition)}
ul{list-style:none}
img{max-width:100%;height:auto;display:block}
.container{max-width:var(--max);margin:0 auto;padding:0 20px}

/* ===== HEADER ===== */
.site-header{background:rgba(255,255,255,.97);position:sticky;top:0;z-index:1000;box-shadow:0 1px 0 rgba(0,0,0,.06);backdrop-filter:blur(10px)}
.top-bar{background:var(--gray-bg);font-size:13px;padding:7px 0;color:var(--gray-text)}
.top-bar .wrap{max-width:var(--max);margin:0 auto;padding:0 20px;display:flex;justify-content:space-between;align-items:center}
.header-main{max-width:var(--max);margin:0 auto;padding:0 20px;display:flex;align-items:center;justify-content:space-between;height:70px}
.logo{display:flex;align-items:center;gap:12px}
.logo img{width:48px;height:48px;object-fit:contain}
.logo .brand{font-size:22px;font-weight:700;color:var(--blue);letter-spacing:1px}
.nav-links{display:flex}
.nav-links a{display:flex;align-items:center;padding:0 18px;height:70px;font-size:15px;font-weight:500;color:var(--text);position:relative}
.nav-links a:hover,.nav-links a.active{color:var(--blue)}
.nav-links a.active::after{content:'';position:absolute;bottom:0;left:18px;right:18px;height:3px;background:var(--blue);border-radius:3px 3px 0 0}

/* ===== PAGE BANNER ===== */
.page-banner{position:relative;display:flex;align-items:center;justify-content:center;min-height:200px;overflow:hidden}
.page-banner>img{position:absolute;inset:0;width:100%;height:100%;object-fit:cover;opacity:.35}
.page-banner .ov{position:absolute;inset:0}
.page-banner .txt{position:relative;z-index:1;text-align:center;color:#fff;padding:40px 20px}
.page-banner .txt h1{font-size:clamp(26px,4vw,36px);font-weight:700;letter-spacing:3px;margin-bottom:8px}
.page-banner .txt p{font-size:clamp(14px,1.8vw,16px);opacity:.9}

/* ===== BREADCRUMB ===== */
.breadcrumb{max-width:var(--max);margin:0 auto;padding:14px 20px;font-size:13px;color:var(--gray-light);display:flex;align-items:center;gap:6px}
.breadcrumb a{color:var(--blue)}.breadcrumb a:hover{color:var(--blue-dark)}

/* ===== SECTION TITLE ===== */
.sec-title{text-align:center;padding:64px 0 36px}
.sec-title h2{font-size:32px;color:var(--text-dark);margin-bottom:12px;font-weight:700;letter-spacing:1px}
.sec-title p{font-size:15px;color:var(--gray-text);max-width:600px;margin:0 auto}
.sec-title::after{content:'';display:block;width:50px;height:3px;background:var(--blue);margin:16px auto 0;border-radius:2px}

/* ===== BUTTONS ===== */
.btn{display:inline-flex;align-items:center;gap:8px;padding:13px 30px;border-radius:6px;font-weight:600;font-size:14px;cursor:pointer;transition:var(--transition);border:none;letter-spacing:.5px}
.btn-primary{background:var(--blue);color:#fff}
.btn-primary:hover{background:var(--blue-dark);transform:translateY(-2px);box-shadow:0 6px 20px rgba(0,78,162,.3)}
.btn-outline{border:2px solid var(--blue);color:var(--blue);background:transparent}
.btn-outline:hover{background:var(--blue);color:#fff}

/* ===== HERO SLIDER (Home) ===== */
.hero{position:relative;overflow:hidden}
.hero-slider{display:flex;transition:transform .7s cubic-bezier(.4,0,.2,1)}
.hero-slide{min-width:100%}
.hero-slide img{width:100%;height:auto;display:block}
.hero-dots{position:absolute;bottom:28px;left:50%;transform:translateX(-50%);display:flex;gap:10px}
.hero-dots button{width:12px;height:12px;border-radius:50%;border:2px solid #fff;background:transparent;cursor:pointer;padding:0;transition:var(--transition)}
.hero-dots button.active{background:#fff;transform:scale(1.2)}

/* ===== PRODUCT GRID ===== */
.product-cats{display:flex;justify-content:center;gap:0;flex-wrap:wrap;margin-bottom:32px;border-bottom:2px solid var(--gray-border)}
.product-cats a{padding:14px 26px;font-size:14px;font-weight:600;color:var(--gray-text);border-bottom:2px solid transparent;margin-bottom:-2px;transition:var(--transition)}
.product-cats a:hover,.product-cats a.active{color:var(--blue);border-bottom-color:var(--blue)}
.product-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(280px,1fr));gap:28px}
.product-card{background:#fff;border-radius:10px;overflow:hidden;border:1px solid var(--gray-border);transition:var(--transition);box-shadow:0 1px 4px rgba(0,0,0,.03)}
.product-card:hover{box-shadow:var(--shadow);transform:translateY(-3px);border-color:transparent}
.product-card img{width:100%;height:220px;object-fit:cover}
.product-card .info{padding:18px 16px}
.product-card h3{font-size:16px;color:var(--text-dark);margin-bottom:6px}
.product-card p{font-size:13px;color:var(--gray-text)}
.product-card .cat-label{display:inline-block;font-size:11px;color:var(--blue);background:var(--blue-light);padding:3px 10px;border-radius:3px;margin-top:6px}

/* ===== CASE GRID ===== */
.case-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(340px,1fr));gap:28px}
.case-card{border-radius:10px;overflow:hidden;position:relative}
.case-card img{width:100%;height:260px;object-fit:cover}
.case-card .overlay{position:absolute;bottom:0;left:0;right:0;padding:20px 24px;background:linear-gradient(transparent,rgba(0,0,0,.8));color:#fff}
.case-card h3{font-size:18px;margin-bottom:4px;font-weight:600}
.case-card p{font-size:13px;opacity:.85}

/* ===== NEWS GRID ===== */
.news-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(340px,1fr));gap:28px}
.news-card{background:#fff;border-radius:10px;overflow:hidden;border:1px solid var(--gray-border);transition:var(--transition)}
.news-card:hover{box-shadow:var(--shadow);transform:translateY(-2px)}
.news-card .thumb{display:flex;align-items:center;justify-content:center;height:190px;color:#fff;font-size:20px;font-weight:700;letter-spacing:1px}
.news-card .info{padding:18px 16px}
.news-card h3{font-size:15px;line-height:1.65;margin-bottom:10px;color:var(--text-dark);display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.news-card time{font-size:12px;color:var(--gray-light)}

/* ===== ADVANTAGES ===== */
.adv-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(250px,1fr));gap:24px;padding:0 20px;max-width:var(--max);margin:0 auto}
.adv-card{text-align:center;padding:40px 24px;background:var(--gray-bg);border-radius:10px;transition:var(--transition)}
.adv-card:hover{background:var(--blue-light);transform:translateY(-2px)}
.adv-card .num{font-size:48px;font-weight:800;color:var(--blue);opacity:.18;margin-bottom:14px}
.adv-card h3{font-size:17px;color:var(--text-dark);margin-bottom:10px}
.adv-card p{font-size:13px;color:var(--gray-text);line-height:1.8}

/* ===== ABOUT SECTION (Home) ===== */
.about-section{display:grid;grid-template-columns:1fr 1fr;gap:56px;align-items:center;max-width:var(--max);margin:0 auto;padding:40px 20px 60px}
.brand-block{min-height:400px;border-radius:16px;display:flex;align-items:center;justify-content:center;text-align:center;color:#fff;position:relative;overflow:hidden}
.brand-block .inner{position:relative;z-index:1;padding:40px}
.brand-block .logo-lg{font-size:72px;margin-bottom:16px}
.brand-block .name{font-size:30px;font-weight:700;margin-bottom:12px;letter-spacing:2px}
.brand-block .sub{font-size:15px;opacity:.88;line-height:1.8;margin-bottom:24px}
.brand-block .badges{display:flex;gap:10px;justify-content:center;flex-wrap:wrap}
.brand-block .badge{background:rgba(255,255,255,.18);padding:6px 16px;border-radius:20px;font-size:12px;letter-spacing:.5px;backdrop-filter:blur(4px)}
.about-text h2{font-size:28px;color:var(--text-dark);margin-bottom:18px}
.about-text p{color:var(--gray-text);margin-bottom:14px;line-height:1.9;font-size:15px}
.stats{display:grid;grid-template-columns:repeat(4,1fr);gap:16px;margin:24px 0}
.stat{text-align:center;padding:20px 12px;background:var(--gray-bg);border-radius:8px;transition:var(--transition)}
.stat:hover{background:var(--blue-light)}
.stat .val{font-size:28px;font-weight:800;color:var(--blue);margin-bottom:4px}
.stat .lbl{font-size:12px;color:var(--gray-text)}

/* ===== CERT GRID ===== */
.cert-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(200px,1fr));gap:20px;margin:24px 0}
.cert-item{background:var(--gray-bg);border-radius:10px;padding:28px 20px;text-align:center;transition:var(--transition)}
.cert-item:hover{background:var(--blue-light);transform:translateY(-2px)}
.cert-item .icon{font-size:38px;margin-bottom:12px}
.cert-item strong{display:block;font-size:15px;color:var(--text-dark);margin-bottom:4px}
.cert-item .desc{font-size:12px;color:var(--gray-text)}

/* ===== CONTENT PAGE ===== */
.content{max-width:860px;margin:0 auto;padding:20px 20px 40px}
.content h2{font-size:26px;color:var(--text-dark);margin:40px 0 18px;padding-left:14px;border-left:4px solid var(--blue)}
.content h3{font-size:18px;color:var(--blue);margin:24px 0 10px}
.content p{margin-bottom:14px;line-height:1.9;color:var(--text);font-size:15px}
.content .lead{font-size:17px;color:var(--gray-text);line-height:1.9;margin-bottom:24px;padding:20px 24px;background:var(--gray-bg);border-radius:8px;border-left:4px solid var(--blue)}

/* ===== TABLE ===== */
.content table{width:100%;border-collapse:collapse;margin:20px 0;font-size:14px}
.content table th{background:var(--blue);color:#fff;padding:12px 16px;text-align:left;font-weight:600}
.content table td{padding:12px 16px;border-bottom:1px solid var(--gray-border)}
.content table tr:nth-child(even) td{background:var(--gray-bg)}

/* ===== CONTACT ===== */
.contact-grid{display:grid;grid-template-columns:1fr 1fr;gap:48px;max-width:var(--max);margin:36px auto;padding:0 20px}
.contact-info h2{font-size:26px;color:var(--text-dark);margin-bottom:28px}
.contact-item{display:flex;gap:16px;margin-bottom:20px;align-items:flex-start}
.contact-item .icon{width:48px;height:48px;background:var(--blue-light);border-radius:12px;display:flex;align-items:center;justify-content:center;color:var(--blue);font-size:22px;flex-shrink:0}
.contact-item .val strong{display:block;font-size:14px;color:var(--text-dark);margin-bottom:2px}
.contact-item .val p{font-size:14px;color:var(--gray-text)}
.map-card{background:linear-gradient(135deg,#e8f2fa,#d4e4f4);min-height:420px;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:14px;border-radius:12px;text-align:center;padding:30px;border:1px solid #d0dde8}
.map-card .pin{font-size:56px}

/* ===== CTA ===== */
.cta-box{background:var(--gray-bg);border-radius:12px;text-align:center;padding:44px 24px;margin:40px auto;max-width:760px}
.cta-box h3{color:var(--blue);font-size:22px;margin-bottom:10px}
.cta-box p{color:var(--gray-text);margin-bottom:18px}

/* ===== CAT TABS ===== */
.cat-tabs{display:flex;justify-content:center;gap:8px;flex-wrap:wrap;margin-bottom:36px}
.cat-tabs a{padding:10px 24px;border-radius:25px;font-weight:600;font-size:14px;transition:var(--transition);background:var(--gray-bg);color:var(--gray-text)}
.cat-tabs a.active,.cat-tabs a:hover{background:var(--blue);color:#fff}

/* ===== FOOTER ===== */
.site-footer{background:#1a1f2b;color:#aab;margin-top:80px}
.footer-main{max-width:var(--max);margin:0 auto;padding:52px 20px;display:grid;grid-template-columns:2fr 1fr 1.5fr;gap:40px}
.footer-main h4{color:#fff;font-size:16px;margin-bottom:18px;padding-bottom:12px;border-bottom:2px solid rgba(255,255,255,.08)}
.footer-main p,.footer-main a{font-size:13px;color:#889;line-height:2.1}
.footer-main a:hover{color:#fff}
.footer-links li{margin-bottom:6px}
.footer-bottom{border-top:1px solid rgba(255,255,255,.06);text-align:center;padding:18px 20px;font-size:12px;color:#667;max-width:var(--max);margin:0 auto}
.footer-bottom a{color:var(--blue)}

/* ===== LIST PAGE SIDEBAR LAYOUT ===== */
.list-layout{display:grid;grid-template-columns:250px 1fr;gap:28px;max-width:var(--max);margin:0 auto;padding:20px}
.sidebar{position:sticky;top:90px;align-self:start}
.sidebar h3{font-size:16px;color:#fff;padding:14px 16px;background:var(--blue);border-radius:8px 8px 0 0;margin:0}
.sidebar ul{background:var(--gray-bg);border-radius:0 0 8px 8px;overflow:hidden}
.sidebar li{border-bottom:1px solid var(--gray-border)}
.sidebar li:last-child{border-bottom:none}
.sidebar a{display:flex;align-items:center;justify-content:space-between;padding:13px 16px;font-size:14px;color:var(--text);transition:var(--transition)}
.sidebar a:hover,.sidebar a.active{background:#fff;color:var(--blue);font-weight:600}
.sidebar a .count{font-size:11px;color:var(--gray-light);background:var(--white);padding:2px 8px;border-radius:10px}
.sidebar a.active .count{background:var(--blue-light);color:var(--blue)}
.list-main h2{font-size:22px;color:var(--text-dark);margin-bottom:8px}
.list-main>.intro{color:var(--gray-text);font-size:14px;margin-bottom:20px;line-height:1.7}
.list-main .product-grid,.list-main .case-grid{margin-bottom:36px}

/* ===== RESPONSIVE ===== */
/* Mobile-first header fixes */
.mobile-menu-btn { display: none; }

/* Tablet */
@media(max-width:900px){
  .about-section,.contact-grid,.footer-main{grid-template-columns:1fr}
  .product-grid,.case-grid,.news-grid{grid-template-columns:repeat(2,1fr)}
  .adv-grid{grid-template-columns:repeat(2,1fr)}
  .stats{grid-template-columns:repeat(2,1fr)}
  .nav-links{display:none}
  .hero-slide img{max-height:300px}
  .page-banner{min-height:180px;max-height:240px}
  .page-banner .txt h1{font-size:24px}
  .page-banner .txt p{font-size:14px}
  .brand-block{min-height:240px}
  .list-layout{grid-template-columns:1fr}
  .sidebar{position:static;margin-bottom:16px}
  .sidebar ul{display:flex;flex-wrap:wrap;gap:6px}
  .sidebar li{border:none}
  .sidebar a{padding:8px 14px;font-size:13px;border-radius:6px;background:var(--gray-bg)}
  .sidebar a.active{background:var(--blue);color:#fff}
  .contact-grid{gap:24px}
  #map{height:280px !important}
  .content{max-width:100%;padding:0 16px 24px}
  .content h2{font-size:22px}
  .footer-main{gap:24px}
  .sec-title{padding:40px 0 20px}
  .sec-title h2{font-size:26px}
  .brand-block .name{font-size:24px}
  .about-section{padding:20px}
  .hero-dots button{width:10px;height:10px}
}

/* Phone */
@media(max-width:600px){
  .product-grid,.case-grid,.news-grid{grid-template-columns:1fr}
  .adv-grid{grid-template-columns:1fr}
  .stats{grid-template-columns:repeat(2,1fr)}
  .stats .val{font-size:24px}
  .hero-slide img{max-height:200px}
  .hero-dots{bottom:14px;gap:8px}
  .hero-dots button{width:8px;height:8px}
  .page-banner{min-height:160px;max-height:200px}
  .page-banner .txt h1{font-size:20px}
  .page-banner .txt p{font-size:13px}
  .page-banner .txt{padding:20px 12px}
  .sec-title h2{font-size:22px}
  .sec-title p{font-size:13px}
  .sec-title{padding:32px 0 16px}
  .top-bar{font-size:11px;padding:6px 0}
  .header-main{height:56px}
  .header-main .logo img{width:36px;height:36px}
  .header-main .brand{font-size:17px}
  .nav-links a{padding:0 10px;font-size:13px;height:56px}
  .product-card img{height:180px}
  .case-card img{height:200px}
  .news-card .thumb{height:160px}
  .about-section{gap:24px}
  .brand-block{min-height:200px}
  .brand-block .name{font-size:20px}
  .brand-block .sub{font-size:13px}
  .brand-block .badge{font-size:10px;padding:4px 10px}
  .features{grid-template-columns:1fr}
  .contact-item .icon{width:36px;height:36px;font-size:16px}
  .contact-grid{gap:16px}
  #map{height:240px !important}
  .content h2{font-size:20px}
  .content{font-size:14px}
  .btn{padding:10px 20px;font-size:13px}
  .footer-main{gap:20px;padding:32px 16px}
  .footer-main h4{font-size:14px}
  .sidebar ul{flex-direction:column;gap:0}
  .sidebar a{padding:10px 14px;font-size:13px;border-radius:0;background:none;border-bottom:1px solid var(--gray-border)}
  .sidebar a.active{background:var(--blue);color:#fff}
  .list-layout{padding:12px}
  .list-main h2{font-size:18px}
  .list-main>.intro{font-size:13px}
  .product-grid,.case-grid,.news-grid{gap:12px}
  .cta-box{padding:28px 16px;margin:24px auto}
  .cta-box h3{font-size:18px}
}