:root{
  --bg:#ffffff; --surface:#f5f7fa; --ink:#16202b; --muted:#5b6b7b;
  --brand:#0b5f9e; --brand-dark:#073f6b; --accent:#f5a623; --line:#e3e9f0;
  --green:#25D366; --red:#b3261e;
  --maxw:1180px;
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{margin:0;font-family:"Segoe UI",Roboto,"Helvetica Neue","Noto Sans JP",system-ui,sans-serif;color:var(--ink);background:var(--bg);line-height:1.65;font-size:16px}
a{color:var(--brand);text-decoration:none}
a:hover{text-decoration:underline}
img{max-width:100%;display:block}
.wrap{max-width:var(--maxw);margin:0 auto;padding:0 20px}
.topbar{background:var(--brand-dark);color:#eaf3fb;font-size:15px;font-weight:600;letter-spacing:.3px;line-height:1.5}
.topbar .wrap{display:flex;justify-content:space-between;align-items:center;max-width:var(--maxw);padding:17px 20px}
.tb-sep{margin:0 16px;opacity:.45;font-weight:400}
.topbar a{color:#cfe2f2}
.lang a{margin-left:12px;opacity:.8}
.lang a.active{opacity:1;font-weight:700;color:#fff}
.topbar .whatsapp-top{display:inline-flex;align-items:center;gap:5px;background:var(--green);color:#fff;padding:5px 12px;border-radius:20px;font-size:13px;font-weight:700;margin-left:14px;transition:filter .15s}
.topbar .whatsapp-top:hover{filter:brightness(1.1);text-decoration:none}
.whatsapp-top svg{width:16px;height:16px;fill:#fff}
header.site{position:sticky;top:0;background:#fff;border-bottom:1px solid var(--line);z-index:50}
header.site .wrap{display:flex;align-items:center;justify-content:space-between;height:66px}
.logo{display:flex;align-items:center;gap:10px}
.logo-img{height:44px;width:auto;display:block}
.logo-text{font-weight:800;font-size:20px;color:var(--brand-dark);letter-spacing:.3px;line-height:1.2}
.logo-text small{display:block;font-weight:400;font-size:11px;color:var(--muted);letter-spacing:0.5px}
nav.main{display:flex;gap:22px;font-weight:600;font-size:15px}
nav.main a{color:var(--ink)}
.btn{display:inline-block;background:var(--accent);color:#1c1300;font-weight:700;padding:11px 20px;border-radius:6px;transition:filter .15s}
.btn:hover{filter:brightness(1.05);text-decoration:none}
.btn.ghost{background:transparent;border:1px solid var(--brand);color:var(--brand)}
.btn.ghost:hover{background:var(--brand);color:#fff}
.hero{position:relative;color:#fff;padding:80px 0;overflow:hidden}
.hero-bg{position:absolute;inset:0;z-index:0}
.hero-bg img{width:100%;height:100%;object-fit:cover}
.hero-bg::after{content:'';position:absolute;inset:0;background:linear-gradient(120deg,rgba(7,63,107,.88),rgba(11,95,158,.78))}
.hero>.wrap{position:relative;z-index:1}
.hero h1{font-size:40px;margin:0 0 16px;line-height:1.2;font-weight:800}
.hero p{font-size:18px;max-width:680px;opacity:.95;margin:0 0 28px;line-height:1.6}
.hero .cta{display:flex;gap:14px;flex-wrap:wrap}
.hero .btn.ghost{color:#fff;border-color:#fff}
.section{padding:60px 0}
.section.alt{background:var(--surface)}
h2.section-title{font-size:28px;margin:0 0 8px}
.section-sub{color:var(--muted);margin:0 0 30px;max-width:720px}
.grid{display:grid;gap:22px}
.grid.cols-3{grid-template-columns:repeat(3,1fr)}
.grid.cols-2{grid-template-columns:repeat(2,1fr)}
.grid.cols-4{grid-template-columns:repeat(4,1fr)}
.card{background:#fff;border:1px solid var(--line);border-radius:10px;padding:24px;transition:box-shadow .2s,transform .2s}
.card:hover{box-shadow:0 8px 24px rgba(20,40,70,.10);transform:translateY(-2px)}
.card h3{margin:0 0 10px;font-size:19px}
.card p{color:var(--muted);margin:0 0 14px;font-size:15px}
.tag{display:inline-block;background:var(--surface);border:1px solid var(--line);color:var(--brand-dark);font-size:12px;font-weight:700;padding:3px 10px;border-radius:20px;margin:0 6px 6px 0}
.features{display:grid;grid-template-columns:repeat(4,1fr);gap:18px;margin-top:10px}
.feat{background:#fff;border:1px solid var(--line);border-radius:10px;padding:20px}
.feat .n{font-size:26px;font-weight:800;color:var(--brand)}
.feat .l{color:var(--muted);font-size:14px}
.trust-icons{display:grid;grid-template-columns:repeat(4,1fr);gap:18px}
.trust-item{text-align:center;padding:20px 12px;background:#fff;border-radius:10px;border:1px solid var(--line)}
.trust-item .ico{font-size:36px;margin-bottom:8px}
.trust-item .t{font-size:28px;font-weight:800;color:var(--brand)}
.trust-item .l{font-size:13px;color:var(--muted);margin-top:4px}
.breadcrumb{font-size:13px;color:var(--muted);padding:16px 0 0}
.breadcrumb a{color:var(--muted)}
/* ===== 产品筛选 & 排序 & 分页 ===== */
.cat-toolbar{display:flex;gap:14px;flex-wrap:wrap;align-items:center;margin:0 0 24px;padding:16px 0;border-bottom:1px solid var(--line)}
.cat-toolbar select,.cat-toolbar input{padding:9px 12px;border:1px solid var(--line);border-radius:7px;font:inherit;font-size:14px;min-width:140px}
.cat-toolbar .sort-group{margin-left:auto;display:flex;gap:8px}
.cat-toolbar .sort-btn{padding:9px 16px;border:1px solid var(--line);border-radius:7px;background:#fff;font-size:14px;cursor:pointer;color:var(--ink);transition:.12s}
.cat-toolbar .sort-btn.active,.cat-toolbar .sort-btn:hover{border-color:var(--brand);color:var(--brand);background:#f0f6ff}
.pagination{display:flex;gap:8px;justify-content:center;margin:32px 0 0}
.pagination a,.pagination span{padding:8px 14px;border:1px solid var(--line);border-radius:7px;font-size:14px;color:var(--ink);transition:.12s}
.pagination a:hover{border-color:var(--brand);color:var(--brand);background:#f0f6ff}
.pagination .active{background:var(--brand);color:#fff;border-color:var(--brand)}
table.spec{width:100%;border-collapse:collapse;margin:18px 0;font-size:14px}
table.spec th,table.spec td{border:1px solid var(--line);padding:9px 12px;text-align:left}
table.spec th{background:var(--surface);color:var(--brand-dark)}
.faq{margin-top:14px}
.faq details{border:1px solid var(--line);border-radius:8px;padding:12px 16px;margin-bottom:10px;background:#fff}
.faq summary{font-weight:700;cursor:pointer}
.faq p{margin:10px 0 0;color:var(--muted)}
form.rfq{display:grid;gap:14px;max-width:620px}
form.rfq label{font-weight:600;font-size:14px}
form.rfq input,form.rfq textarea,form.rfq select{padding:11px 12px;border:1px solid var(--line);border-radius:7px;font:inherit;width:100%}
form.rfq .row{display:grid;grid-template-columns:1fr 1fr;gap:14px}
footer.site{background:var(--brand-dark);color:#cfe2f2;padding:40px 0 24px;margin-top:30px}
footer.site a{color:#cfe2f2}
footer .cols{display:grid;grid-template-columns:2fr 1fr 1fr;gap:30px}
footer h4{color:#fff;margin:0 0 12px;font-size:15px}
.contact-box{background:#fff;color:var(--ink);border-radius:10px;padding:22px}
.note{font-size:13px;color:var(--muted)}
.alert-ok{background:#e7f6ec;color:#1d7a3c;border:1px solid #b7e2c6;padding:12px 14px;border-radius:8px;font-weight:600;margin:0 0 16px}
.prod-img{display:flex;align-items:center;justify-content:center;width:100%;max-width:480px;aspect-ratio:4/3;background:#eef2f7;border:1px dashed #c2cedb;border-radius:8px;color:#8aa0b6;font-size:13px;text-align:center;padding:10px;margin:0 0 14px}
.prod-img img{width:100%;height:100%;object-fit:cover;border-radius:6px;display:block}
.spec-line{font-weight:700;color:var(--brand);font-size:13px;margin:0 0 8px}
.gallery{display:grid;grid-template-columns:repeat(3,1fr);gap:14px;margin:22px 0}
.ph-img{position:relative;aspect-ratio:4/3;background:#eef2f7;border:1px solid #e3e9f0;border-radius:8px;overflow:hidden}
.ph-img img{width:100%;height:100%;object-fit:cover;display:block}
.ph-img .cap{position:absolute;left:0;right:0;bottom:0;background:rgba(7,63,107,.72);color:#fff;font-size:12px;padding:5px 8px}
/* ===== Certificates ===== */
.cert-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(180px,1fr));gap:16px}
.cert-card{background:#fff;border:1px solid var(--line);border-radius:10px;padding:16px;text-align:center}
.cert-card img{width:100%;aspect-ratio:4/3;object-fit:contain;background:#f8fafc;border-radius:6px;margin-bottom:8px}
.cert-card .cert-name{font-size:13px;font-weight:600;color:var(--ink)}
/* ===== Blog tags & categories ===== */
.blog-meta{display:flex;gap:10px;flex-wrap:wrap;margin:8px 0 14px}
.blog-tag{display:inline-block;font-size:11px;font-weight:600;padding:3px 10px;border-radius:14px;background:#eef3ff;color:var(--brand)}
.blog-cat{display:inline-block;font-size:11px;font-weight:600;padding:3px 10px;border-radius:14px;background:#eafaf0;color:#1c7c43}
/* ===== Analytics slot ===== */
.ga-slot{display:none}
/* ===== Banner edit area ===== */
.banner-placeholder{position:absolute;inset:0;display:flex;align-items:center;justify-content:center;background:linear-gradient(120deg,var(--brand-dark),var(--brand));color:#fff;font-size:14px;opacity:.6}
/* ===== category filter toolbar ===== */
.cat-toolbar{display:flex;align-items:center;gap:12px;margin-bottom:24px;padding:12px 16px;background:#fff;border:1px solid var(--line,#e5e7eb);border-radius:10px}
.cat-toolbar input[type=text]{flex:1;padding:10px 14px;border:1px solid var(--line,#e5e7eb);border-radius:8px;font-size:14px;outline:none;color:var(--ink);min-width:180px}
.cat-toolbar input:focus{border-color:var(--brand)}
.cat-toolbar select{padding:10px 14px;border:1px solid var(--line,#e5e7eb);border-radius:8px;font-size:14px;background:#fff;color:var(--ink);cursor:pointer}
.cat-toolbar .result-count{font-size:13px;color:var(--mut,#6b7280);white-space:nowrap}
.card.hidden{display:none}
/* ===== what's new badge ===== */
.badge-hot{display:inline-block;background:var(--red);color:#fff;font-size:10px;font-weight:700;padding:2px 7px;border-radius:3px;margin-left:6px;vertical-align:middle;text-transform:uppercase;letter-spacing:.5px}

@media(max-width:880px){.gallery,.grid.cols-3,.grid.cols-4,.features,.trust-icons{grid-template-columns:repeat(2,1fr)}.grid.cols-2{grid-template-columns:1fr}footer .cols{grid-template-columns:1fr}form.rfq .row{grid-template-columns:1fr}.hero h1{font-size:30px}.cat-toolbar{flex-direction:column;align-items:stretch}.cat-toolbar .sort-group{margin-left:0}}
@media(max-width:600px){.topbar .wrap{flex-direction:column;gap:6px;padding:10px 16px;text-align:center}.topbar{font-size:13px}.lang a{margin:0 8px}.topbar .whatsapp-top{margin-left:0}.gallery,.grid.cols-3,.grid.cols-4,.features,.trust-icons{grid-template-columns:1fr}}

/* 右下角悬浮联系卡 */
.contact-float{position:fixed;right:16px;bottom:16px;z-index:60;background:#fff;border:1px solid var(--line);border-radius:14px;box-shadow:0 12px 40px rgba(20,30,60,.18);padding:16px 20px;max-width:280px}
.contact-float .cf-title{display:block;font-size:21px;font-weight:700;color:var(--ink);text-decoration:none;margin-bottom:6px}
.contact-float .cf-title:hover{color:var(--brand)}
.contact-float .cf-sub{font-size:15px;color:var(--brand);font-weight:600;margin-bottom:10px}
.contact-float .cf-lines{font-size:15px;line-height:1.75;color:var(--ink)}
.contact-float .cf-mail{color:var(--brand);font-weight:600}
/* WhatsApp float button */
.whatsapp-float{position:fixed;right:16px;bottom:190px;z-index:61;width:56px;height:56px;background:var(--green);border-radius:50%;display:flex;align-items:center;justify-content:center;box-shadow:0 6px 24px rgba(37,211,102,.35);transition:transform .2s,box-shadow .2s}
.whatsapp-float:hover{transform:scale(1.1);box-shadow:0 8px 32px rgba(37,211,102,.45)}
.whatsapp-float svg{width:30px;height:30px;fill:#fff}
/* Mobile hamburger nav */
.nav-toggle{display:none}
.nav-toggle-label{display:none;position:absolute;right:16px;top:16px;z-index:100;cursor:pointer;width:28px;height:22px}
.nav-toggle-label span,.nav-toggle-label span::before,.nav-toggle-label span::after{display:block;width:28px;height:3px;background:var(--ink);border-radius:2px;position:absolute;transition:transform .25s,background .25s}
.nav-toggle-label span::before,.nav-toggle-label span::after{content:'';left:0}
.nav-toggle-label span::before{top:-8px}
.nav-toggle-label span::after{top:8px}
.nav-toggle:checked+.nav-toggle-label span{background:transparent}
.nav-toggle:checked+.nav-toggle-label span::before{transform:rotate(45deg);top:0}
.nav-toggle:checked+.nav-toggle-label span::after{transform:rotate(-45deg);top:0}
@media(max-width:880px){header.site .wrap{position:relative}.nav-toggle-label{display:block}.nav-clamp{display:none;flex-direction:column;width:100%;position:absolute;top:44px;left:0;background:#fff;box-shadow:0 8px 24px rgba(0,0,0,.1);border-radius:0 0 8px 8px;padding:8px 0;z-index:99}.nav-toggle:checked~.nav-clamp{display:flex}.nav-clamp a{display:block;padding:10px 20px;border-bottom:1px solid #f0f0f0;font-size:16px}.nav-clamp a:last-child{border-bottom:none}}