:root{
  --blue:#0a6ebd; --blue-d:#085a9c; --teal:#00a3a3; --ink:#1f2d3d;
  --muted:#64748b; --line:#e3edf5; --bg:#f4f8fb; --card:#ffffff;
  --shadow:0 6px 24px rgba(10,110,189,.08);
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{margin:0;font-family:"Microsoft YaHei","PingFang SC",system-ui,-apple-system,"Segoe UI",Roboto,Helvetica,Arial,sans-serif;
  color:var(--ink);background:var(--bg);line-height:1.7;font-size:16px}
a{color:var(--blue);text-decoration:none}
img{max-width:100%}
.container{max-width:1160px;margin:0 auto;padding:0 20px}
h1,h2,h3{line-height:1.3;margin:0 0 .5em}
p{margin:0 0 1em}

/* header */
.site-header{position:sticky;top:0;z-index:50;background:#fff;border-bottom:1px solid var(--line);box-shadow:0 2px 10px rgba(0,0,0,.04)}
.header-inner{display:flex;align-items:center;justify-content:space-between;height:68px;gap:16px}
.brand{display:flex;align-items:center;gap:10px;color:var(--ink)}
.brand .logo-mark{flex:none}
.brand-text b{display:block;font-size:18px;color:var(--blue)}
.brand-text small{display:block;font-size:11px;color:var(--muted);font-weight:400}
.nav-links{display:flex;gap:2px;flex-wrap:wrap}
.nav-links a{padding:9px 11px;border-radius:8px;color:var(--ink);font-size:16px;font-weight:500;white-space:nowrap}
.nav-links a:hover{background:var(--bg);color:var(--blue)}
.nav-links a.active{background:var(--blue);color:#fff}
.nav-toggle{display:none;flex-direction:column;gap:5px;background:none;border:0;cursor:pointer;padding:8px}
.nav-toggle span{width:24px;height:2px;background:var(--ink);border-radius:2px}

/* hero */
.hero{background:linear-gradient(135deg,#0a6ebd 0%,#00a3a3 100%);color:#fff}
.hero-inner{display:flex;gap:40px;align-items:center;padding:64px 20px}
.hero-text{flex:1}
.badge{display:inline-block;background:rgba(255,255,255,.18);padding:6px 14px;border-radius:999px;font-size:13px;margin-bottom:18px}
.hero h1{font-size:42px;margin-bottom:14px}
.lead{font-size:18px;opacity:.95;max-width:620px}
.hero-cta{margin-top:24px;display:flex;gap:14px;flex-wrap:wrap}
.btn{display:inline-block;padding:12px 26px;border-radius:10px;font-weight:600;cursor:pointer;border:0;font-size:15px}
.btn-primary{background:#fff;color:var(--blue)}
.btn-primary:hover{background:#eaf4ff}
.btn-ghost{background:transparent;color:#fff;border:1.5px solid rgba(255,255,255,.7)}
.btn-ghost:hover{background:rgba(255,255,255,.12)}
/* wechat card (replaces phone) */
.wx-card{background:rgba(255,255,255,.14);border:1px solid rgba(255,255,255,.3);border-radius:16px;padding:20px 22px;min-width:240px;display:flex;gap:16px;align-items:center}
.wx-qr{width:104px;height:104px;background:#fff;border-radius:12px;padding:6px;flex:none}
.wx-text{color:#fff;display:flex;flex-direction:column;gap:4px}
.wx-label{font-size:13px;opacity:.9}
.wx-id{font-size:20px;font-weight:700}
.wx-tip{font-size:12px;opacity:.85}

/* stats */
.stats{background:#fff;border-bottom:1px solid var(--line)}
.stats-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:10px;padding:26px 20px;text-align:center}
.stats-grid b{display:block;font-size:34px;color:var(--blue)}
.stats-grid span{color:var(--muted);font-size:14px}

/* hero-card legacy (kept for safety) */
.hero-card{background:rgba(255,255,255,.12);border:1px solid rgba(255,255,255,.25);border-radius:16px;padding:26px 30px;min-width:240px}
.hero-card h3{color:#fff;font-size:15px;opacity:.9;font-weight:500}
.hero-card .big{font-size:30px;font-weight:700;margin:.2em 0}
.hero-card p{margin:.3em 0;font-size:14px;opacity:.92}

/* category cards with thumb */
.cat-card{background:var(--card);border:1px solid var(--line);border-radius:14px;padding:0;overflow:hidden;transition:.2s;display:block;color:var(--ink)}
.cat-card:hover{transform:translateY(-4px);box-shadow:var(--shadow);border-color:var(--blue)}
.cat-thumb{display:block;height:120px;background-size:cover;background-position:center}
.cat-card .cat-ico{display:block;color:var(--teal);font-size:18px;margin:14px 18px 4px}
.cat-card b{display:block;font-size:17px;margin:0 18px 6px}
.cat-card p{color:var(--muted);font-size:13px;margin:0 18px 16px}

/* feature grid (product showcase) */
.feat-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:16px;margin:10px 0 30px}
.feat{background:#fff;border:1px solid var(--line);border-radius:12px;overflow:hidden;display:flex;flex-direction:column;transition:.2s;color:var(--ink)}
.feat:hover{transform:translateY(-3px);box-shadow:var(--shadow);border-color:var(--blue)}
.feat img{width:100%;height:150px;object-fit:cover;display:block}
.feat div{padding:14px 16px}
.feat b{display:block;font-size:16px}
.feat span{color:var(--muted);font-size:13px}

/* why choose us */
.why-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:18px;margin-bottom:30px}
.why{background:#fff;border:1px solid var(--line);border-radius:14px;padding:22px;position:relative}
.why-n{position:absolute;top:-14px;left:18px;width:30px;height:30px;border-radius:50%;background:var(--blue);color:#fff;display:flex;align-items:center;justify-content:center;font-weight:700}
.why b{display:block;font-size:16px;margin:6px 0 8px}
.why p{color:var(--muted);font-size:13px;margin:0}

/* category banner */
.cat-banner{position:relative;height:240px;background-size:cover;background-position:center}
.cat-banner-mask{position:absolute;inset:0;background:linear-gradient(135deg,rgba(10,110,189,.82),rgba(0,163,163,.72));display:flex;align-items:center}
.cat-banner-mask h1{color:#fff;font-size:34px;margin:0}
.cat-banner-mask p{color:#fff;opacity:.92;margin:.4em 0 0;font-size:15px}

/* product cards */
.pcard-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:18px;margin-bottom:30px}
.pcard{background:#fff;border:1px solid var(--line);border-radius:14px;overflow:hidden;display:flex;flex-direction:column}
.pcard img{width:100%;height:160px;object-fit:cover}
.pcard-b{padding:16px 18px;display:flex;flex-direction:column;gap:8px;flex:1}
.pcard-b b{font-size:16px}
.pcard-b p{color:var(--muted);font-size:13px;margin:0;flex:1}
.btn-mini{display:inline-block;align-self:flex-start;background:var(--blue);color:#fff;padding:7px 16px;border-radius:8px;font-size:13px;font-weight:600}
.btn-mini:hover{background:var(--blue-d)}

/* contact wechat card override on light bg */
.contact-info .wx-card{background:#eaf4ff;border:1px solid #cfe4f7}
.contact-info .wx-text{color:var(--ink)}
.contact-info .wx-label{color:var(--muted)}
.contact-info .wx-id{color:var(--blue)}

/* sections */
.sec-head{text-align:center;margin:48px auto 22px}
.sec-head h2{font-size:28px;color:var(--ink)}
.sec-head h2:after{content:"";display:block;width:54px;height:4px;background:var(--teal);margin:12px auto 0;border-radius:2px}
.sec-head p{color:var(--muted)}

/* category grid */
.cat-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:18px;margin-bottom:20px}
.cat-card{background:var(--card);border:1px solid var(--line);border-radius:14px;padding:22px;transition:.2s;display:block;color:var(--ink)}
.cat-card:hover{transform:translateY(-4px);box-shadow:var(--shadow);border-color:var(--blue)}
.cat-card .cat-ico{display:inline-block;color:var(--teal);font-size:20px;margin-bottom:8px}
.cat-card b{display:block;font-size:17px;margin-bottom:6px}
.cat-card p{color:var(--muted);font-size:13px;margin:0}

/* feat grid */
.feat-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:14px;margin-bottom:30px}
.prod{background:#fff;border:1px solid var(--line);border-radius:10px;padding:14px 16px;font-size:14px;display:flex;align-items:center;gap:10px}
.prod .dot{width:8px;height:8px;border-radius:50%;background:var(--teal);flex:none}

/* partners */
.partner-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:18px;margin-bottom:30px}
.partner{background:#fff;border:1px solid var(--line);border-left:4px solid var(--blue);border-radius:10px;padding:18px 20px}
.partner b{display:block;font-size:16px;color:var(--ink)}
.partner span{color:var(--muted);font-size:13px}

/* cta band */
.cta-band{background:linear-gradient(135deg,#eaf4ff,#f0fbfb);border:1px solid var(--line);border-radius:16px;
  padding:36px 30px;text-align:center;margin:40px auto}
.cta-band h2{font-size:24px}
.cta-band p{color:var(--muted)}

/* page hero */
.page-hero{background:linear-gradient(135deg,#0a6ebd,#00a3a3);color:#fff;padding:46px 0}
.page-hero h1{font-size:34px;margin:0}
.page-hero p{opacity:.9;margin:.4em 0 0;font-size:15px}

/* lists */
.prod-list{list-style:none;padding:0;margin:0;display:grid;grid-template-columns:repeat(2,1fr);gap:10px 26px}
.prod-list li{display:flex;align-items:flex-start;gap:10px;padding:8px 0;border-bottom:1px dashed var(--line);font-size:15px}
.prod-list li .dot{width:8px;height:8px;border-radius:50%;background:var(--teal);margin-top:9px;flex:none}
.prod-list li.muted{color:var(--muted);border:0}
.art-list{list-style:none;padding:0;margin:0;display:grid;grid-template-columns:repeat(2,1fr);gap:12px}
.art-list a{display:block;background:#fff;border:1px solid var(--line);border-radius:10px;padding:14px 18px;color:var(--ink)}
.art-list a:hover{border-color:var(--blue);color:var(--blue)}
.step-list{list-style:none;counter-reset:s;padding:0;margin:0;display:grid;gap:12px}
.step-list li{counter-increment:s;background:#fff;border:1px solid var(--line);border-radius:12px;padding:16px 18px 16px 56px;position:relative}
.step-list li:before{content:counter(s);position:absolute;left:16px;top:16px;width:26px;height:26px;border-radius:50%;
  background:var(--blue);color:#fff;display:flex;align-items:center;justify-content:center;font-size:14px;font-weight:700}

/* prose */
.prose{max-width:820px;margin:0 auto;padding:36px 20px}
.prose .muted{color:var(--muted);font-size:14px}
.article p{margin-bottom:1.1em}

/* contact */
.contact-grid{display:grid;grid-template-columns:1fr 1fr;gap:30px;padding:40px 20px}
.contact-info{background:#fff;border:1px solid var(--line);border-radius:14px;padding:28px}
.contact-info .hot{font-size:22px}
.contact-form{background:#fff;border:1px solid var(--line);border-radius:14px;padding:28px;display:flex;flex-direction:column;gap:12px}
.contact-form input,.contact-form textarea{padding:12px 14px;border:1px solid var(--line);border-radius:10px;font-size:15px;font-family:inherit;width:100%}
.contact-form input:focus,.contact-form textarea:focus{outline:none;border-color:var(--blue)}
.form-note{font-size:12px;color:var(--muted);margin:0}

/* footer */
.site-footer{background:#0f2236;color:#cdd9e5;margin-top:50px}
.footer-grid{display:grid;grid-template-columns:1.4fr 1fr 1fr;gap:30px;padding:44px 20px 30px}
.site-footer h4{color:#fff;font-size:16px;margin-bottom:14px}
.site-footer a{color:#8fc4ee}
.site-footer .hot a{color:#fff;font-weight:700;font-size:18px}
.footer-links{display:flex;flex-direction:column;gap:6px}
.footer-links a{color:#cdd9e5}
.footer-bottom{border-top:1px solid rgba(255,255,255,.08);padding:16px 20px;font-size:12px;color:#8aa0b5;
  display:flex;justify-content:space-between;flex-wrap:wrap;gap:8px}

/* responsive */
@media(max-width:900px){
  .cat-grid,.feat-grid,.partner-grid,.why-grid,.pcard-grid,.stats-grid{grid-template-columns:repeat(2,1fr)}
  .hero-inner{flex-direction:column;align-items:flex-start;padding:44px 20px}
  .hero h1{font-size:32px}
  .contact-grid{grid-template-columns:1fr}
  .prod-list,.art-list{grid-template-columns:1fr}
}
@media(max-width:640px){
  .nav-toggle{display:flex}
  .nav-links{display:none;position:absolute;top:68px;left:0;right:0;background:#fff;flex-direction:column;
    padding:10px 20px;border-bottom:1px solid var(--line);box-shadow:var(--shadow)}
  .nav-links.open{display:flex}
  .nav-links a{padding:12px 8px}
  .cat-grid,.feat-grid,.partner-grid,.why-grid,.pcard-grid,.stats-grid{grid-template-columns:1fr}
  .hero-card{min-width:0;width:100%}
  .wx-card{min-width:0;width:100%}
  .footer-grid{grid-template-columns:1fr}
}

/* 文章页产品图 */
.art-img{max-width:min(420px,100%);height:auto;display:block;margin:0 0 18px;border-radius:10px;border:1px solid var(--line)}
/* 产品卡图片统一样式（真实历史照片） */
.pcard img{width:100%;height:200px;object-fit:contain;background:#f4f8fc;padding:10px}

/* 行业资讯卡片 */
.news-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:16px;margin:18px auto 34px}
.news-card{display:block;background:var(--card);border:1px solid var(--line);border-radius:12px;padding:18px 20px;color:var(--ink);box-shadow:var(--shadow);transition:transform .15s ease,border-color .15s ease}
.news-card:hover{transform:translateY(-2px);border-color:var(--blue)}
.news-card b{display:block;font-size:17px;color:var(--blue);margin-bottom:8px;line-height:1.4}
.news-card p{font-size:14px;color:var(--muted);margin:0}
@media(max-width:640px){.news-grid{grid-template-columns:1fr}}

/* 报价表 */
.price-wrap{display:grid;grid-template-columns:1fr 1fr;gap:18px;margin:16px 0 30px}
.price-table{width:100%;border-collapse:collapse;background:var(--card);border-radius:12px;overflow:hidden;box-shadow:var(--shadow);font-size:15px}
.price-table th{background:var(--blue);color:#fff;padding:10px 14px;text-align:left;font-size:15px}
.price-table td{padding:9px 14px;border-bottom:1px solid var(--line)}
.price-table tr:last-child td{border-bottom:0}
.price-table tr:nth-child(even) td{background:#f8fbfe}
.price-table .pn{width:52px;color:var(--muted);text-align:center}
.price-table .pr{width:96px;text-align:right;color:#c0392b;font-weight:600;font-variant-numeric:tabular-nums}
@media(max-width:760px){.price-wrap{grid-template-columns:1fr}}

/* 订货单下载区 */
.dl-band{display:grid;grid-template-columns:1fr 1fr;gap:16px;margin:8px 0 14px}
.dl-btn{display:flex;align-items:center;gap:14px;background:var(--card);border:1.5px solid var(--line);border-radius:14px;padding:18px 20px;text-decoration:none;color:var(--ink);box-shadow:var(--shadow);transition:transform .15s ease,border-color .15s ease}
.dl-btn:hover{transform:translateY(-2px);border-color:var(--blue)}
.dl-btn .dl-ico{font-size:30px;line-height:1}
.dl-btn .dl-t b{display:block;font-size:16px;color:var(--blue);margin-bottom:3px}
.dl-btn .dl-t small{font-size:13px;color:var(--muted)}
.dl-btn.dl-doc{background:linear-gradient(180deg,#fff,#f2f8fe)}
.dl-hint{font-size:13.5px;color:var(--muted);margin:0 0 26px}
@media(max-width:760px){.dl-band{grid-template-columns:1fr}}