/* ===== 山东四海鸿昌 · 共享样式 ===== */
:root{
  --ink:#12283a; --brand:#1f6f78; --brand-d:#164e59; --accent:#d9912b;
  --bg:#f5f7f6; --line:#dde7e5; --muted:#5e6f74; --white:#fff;
  --radius:8px; --shadow:0 8px 24px rgba(18,40,58,.07);
}
*{margin:0;padding:0;box-sizing:border-box}
html{scroll-behavior:smooth}
body{
  font-family:"PingFang SC","Microsoft YaHei","Hiragino Sans GB",-apple-system,"Segoe UI",sans-serif;
  color:var(--ink);background:var(--white);line-height:1.8;-webkit-font-smoothing:antialiased;
}
a{color:inherit;text-decoration:none}
img{max-width:100%;display:block}
.wrap{max-width:1200px;margin:0 auto;padding:0 24px}
.btn{display:inline-flex;align-items:center;gap:8px;padding:13px 24px;border-radius:8px;
  font-weight:700;font-size:15px;transition:.25s;cursor:pointer;border:0}
.btn-primary{background:var(--accent);color:#2f2107;box-shadow:0 6px 16px rgba(217,145,43,.18)}
.btn-primary:hover{background:#e0a14a;transform:translateY(-2px)}
.btn-line{background:transparent;color:var(--brand);border:1.5px solid var(--brand)}
.btn-line:hover{background:var(--brand);color:#fff}

/* ===== Header ===== */
header{position:sticky;top:0;z-index:50;background:rgba(255,255,255,.96);
  backdrop-filter:blur(8px);border-bottom:1px solid var(--line)}
.nav{display:flex;align-items:center;justify-content:space-between;height:74px}
.logo{display:flex;align-items:center;gap:12px;font-weight:800;font-size:19px}
.logo-mark{width:42px;height:42px;border-radius:8px;
  background:#fff url("../favicon.png") center/26px 26px no-repeat;border:1px solid var(--line);
  display:grid;place-items:center;color:transparent;font-size:0;font-weight:800;flex:none;overflow:hidden}
.logo small{display:block;font-size:11px;color:var(--muted);font-weight:500;letter-spacing:1px}
.menu{display:flex;gap:22px;list-style:none;font-weight:600;font-size:15px}
.menu a:hover{color:var(--brand)}
.menu a.active{color:var(--brand)}
.nav-cta{display:flex;align-items:center;gap:18px}
.nav-tel{font-weight:800;color:var(--brand);font-size:17px;white-space:nowrap}
.nav-tel small{display:block;font-size:11px;color:var(--muted);font-weight:500}
.burger{display:none;background:none;border:0;font-size:26px;cursor:pointer;color:var(--ink)}

/* ===== Page hero (内页 banner) ===== */
.page-hero{background:linear-gradient(135deg,#12394b,#1f6f78 64%,#3d8b85);
  color:#fff;padding:54px 0;position:relative;overflow:hidden}
.page-hero::after{display:none}
.page-hero .wrap{position:relative;z-index:2}
.page-hero h1{font-size:32px;font-weight:800}
.page-kicker{font-size:32px;font-weight:800}
.breadcrumb{margin-top:12px;font-size:14px;color:#cfe0f3}
.breadcrumb a:hover{color:#fff}
.breadcrumb span{margin:0 8px;opacity:.6}

/* ===== Layout with sidebar ===== */
.layout{display:grid;grid-template-columns:1fr 320px;gap:40px;padding:56px 0}
.aside-box{background:var(--bg);border:1px solid var(--line);border-radius:var(--radius);
  padding:22px;margin-bottom:24px}
.aside-box h3{font-size:17px;margin-bottom:14px;padding-bottom:10px;border-bottom:2px solid var(--brand)}
.aside-list{list-style:none}
.aside-list li{border-bottom:1px dashed var(--line)}
.aside-list li:last-child{border:0}
.aside-list a{display:block;padding:10px 0;font-size:14px;color:var(--muted);transition:.2s}
.aside-list a:hover{color:var(--brand);padding-left:6px}
.aside-cta{background:linear-gradient(135deg,#12394b,#1f6f78);color:#fff;border-radius:var(--radius);
  padding:26px 22px;text-align:center}
.aside-cta h3{color:#fff;border:0;font-size:17px;margin-bottom:6px}
.aside-cta .tel{font-size:24px;font-weight:800;color:var(--accent);margin:8px 0}
.aside-cta p{font-size:13px;color:#cfe0f3}

/* ===== Product detail ===== */
.pd-title{font-size:27px;font-weight:800;margin-bottom:8px}
.pd-sub{color:var(--muted);margin-bottom:22px}
.pd-banner{height:230px;border-radius:var(--radius);display:grid;place-items:center;
  background:linear-gradient(135deg,#edf5f2,#dcebe7);position:relative;margin-bottom:28px}
.pd-banner svg{width:88px;height:88px;opacity:.85}
.pd-banner .note{position:absolute;bottom:10px;right:14px;font-size:12px;color:#8aa0a0}
.pd-section{margin-bottom:30px}
.pd-section h2{font-size:20px;margin-bottom:12px;padding-left:12px;border-left:4px solid var(--accent)}
.pd-section p{color:#3c4a59;margin-bottom:10px}
.spec-table{width:100%;border-collapse:collapse;font-size:14px}
.spec-table th,.spec-table td{border:1px solid var(--line);padding:11px 14px;text-align:left}
.spec-table th{background:var(--bg);width:130px;color:var(--ink);font-weight:700}
.feature-grid{display:grid;grid-template-columns:1fr 1fr;gap:14px}
.feature-grid .fi{display:flex;gap:10px;background:var(--bg);border-radius:10px;padding:14px}
.feature-grid .fi b{display:block;font-size:15px;margin-bottom:2px}
.feature-grid .fi span{font-size:13px;color:var(--muted)}
.feature-grid .fi .dot{flex:none;width:8px;height:8px;border-radius:50%;background:var(--accent);margin-top:8px}
.tag-row{display:flex;flex-wrap:wrap;gap:9px}
.tag-row span{background:var(--bg);border:1px solid var(--line);border-radius:8px;
  padding:6px 14px;font-size:13px;color:var(--muted)}
.pd-checklist{display:grid;grid-template-columns:1fr 1fr;gap:12px}
.pd-checklist div{background:#fff;border:1px solid var(--line);border-radius:10px;padding:12px 14px;color:#3c4a59;font-size:14px}
.pd-checklist b{display:block;color:var(--ink);margin-bottom:2px}
.company-fit{background:var(--bg);border:1px solid var(--line);border-radius:10px;padding:18px 20px}
.company-fit h2{margin-bottom:10px}
.company-fit p{color:#3c4a59;font-size:14.5px;margin-bottom:12px}
.company-fit-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:12px}
.company-fit-grid div{background:#fff;border:1px solid var(--line);border-radius:8px;padding:12px 14px;font-size:14px;color:#3c4a59}
.company-fit-grid b{display:block;color:var(--ink);margin-bottom:3px}
.company-fit-links{margin:12px 0 0;font-size:14px}
.company-fit-links a{color:var(--brand);font-weight:700;margin-right:12px}
.company-fit-links a:hover{text-decoration:underline}
.order-box{background:#fff;border:1px solid var(--line);border-radius:10px;padding:18px 20px}
.order-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:12px;margin-top:12px}
.order-grid div{background:var(--bg);border:1px solid var(--line);border-radius:8px;padding:12px 14px;color:#3c4a59;font-size:14px}
.order-grid b{display:block;color:var(--ink);margin-bottom:3px}
.quote-list{display:grid;grid-template-columns:1fr 1fr;gap:10px;margin-top:12px}
.quote-list span{background:#fff;border:1px dashed #c8d8d5;border-radius:8px;padding:9px 12px;color:#3c4a59;font-size:14px}
.placeholder-card{background:var(--bg);border:1px dashed #b9c8c5;border-radius:10px;padding:18px;color:#5e6f74;font-size:14px}
.placeholder-card b{display:block;color:var(--ink);margin-bottom:4px}
.faq-list{display:grid;gap:12px}
.faq-list details{background:#fff;border:1px solid var(--line);border-radius:10px;padding:14px 16px}
.faq-list summary{cursor:pointer;font-weight:700;color:var(--ink)}
.faq-list p{margin:8px 0 0;color:#3c4a59;font-size:14px}

/* ===== GEO content blocks ===== */
.answer-box{background:#fff;border:1px solid var(--line);border-left:4px solid var(--brand);
  border-radius:0 10px 10px 0;padding:18px 20px;margin-bottom:28px;color:#3c4a59}
.answer-box b{display:block;color:var(--ink);font-size:17px;margin-bottom:6px}
.answer-box p{margin:0;color:#3c4a59}
.quick-facts{display:grid;grid-template-columns:repeat(2,1fr);gap:12px;margin:18px 0 28px}
.quick-fact{background:var(--bg);border:1px solid var(--line);border-radius:10px;padding:14px 16px;color:#3c4a59;font-size:14px}
.quick-fact b{display:block;color:var(--ink);margin-bottom:3px}
.evidence-table{width:100%;border-collapse:collapse;font-size:14px;margin:14px 0 24px}
.evidence-table th,.evidence-table td{border:1px solid var(--line);padding:12px 14px;text-align:left;vertical-align:top}
.evidence-table th{background:var(--bg);color:var(--ink);font-weight:800;width:170px}
.decision-grid{display:grid;grid-template-columns:1fr 1fr;gap:14px;margin:12px 0 24px}
.decision-card{background:#fff;border:1px solid var(--line);border-radius:10px;padding:16px;color:#3c4a59;font-size:14px}
.decision-card b{display:block;color:var(--ink);margin-bottom:6px}
.flow-list{counter-reset:flow;display:grid;gap:12px;margin:12px 0 24px}
.flow-list li{list-style:none;background:var(--bg);border:1px solid var(--line);border-radius:10px;
  padding:14px 16px 14px 52px;position:relative;color:#3c4a59;font-size:14px}
.flow-list li::before{counter-increment:flow;content:counter(flow);position:absolute;left:16px;top:15px;
  width:24px;height:24px;border-radius:50%;background:var(--accent);color:#2f2107;font-weight:800;
  display:grid;place-items:center;font-size:13px}
.resource-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:14px;margin-top:12px}
.resource-card{background:#fff;border:1px solid var(--line);border-radius:10px;padding:16px;display:block}
.resource-card b{display:block;color:var(--ink);margin-bottom:5px}
.resource-card span{display:block;color:var(--muted);font-size:13.5px}
.resource-card:hover{border-color:#c8d8d5;box-shadow:var(--shadow);transform:translateY(-2px)}

/* ===== Cases and conversion ===== */
.case-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:18px}
.case-card{background:#fff;border:1px solid var(--line);border-radius:10px;padding:18px;display:flex;flex-direction:column;transition:.25s;min-height:100%}
.case-card:hover{border-color:#c8d8d5;box-shadow:var(--shadow);transform:translateY(-2px)}
.case-card .case-photo{height:154px;border-radius:8px;background:linear-gradient(135deg,#edf5f2,#dcebe7);
  display:grid;place-items:center;color:#8aa0a0;font-size:13px;margin-bottom:18px;border:1px solid #d8e5e1;overflow:hidden}
.case-card .case-photo img{width:100%;height:100%;object-fit:cover;border-radius:7px;display:block}
.case-card b{display:block;font-size:18px;line-height:1.35;margin-bottom:8px;color:#083149}
.case-card p{color:#3c4a59;font-size:14px;line-height:1.75;margin-bottom:14px}
.case-card span{color:var(--brand);font-weight:700;font-size:14px;margin-top:auto}
.trust-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:14px}
.trust-item{background:#fff;border:1px solid var(--line);border-radius:10px;padding:18px;color:#3c4a59;font-size:14px}
.trust-item b{display:block;color:var(--ink);margin-bottom:6px}
.contact-tools{display:grid;grid-template-columns:1fr 1fr;gap:12px;margin-top:12px}
.contact-tool{background:#fff;border:1px solid var(--line);border-radius:10px;padding:14px;color:#3c4a59;font-size:14px}
.contact-tool b{display:block;color:var(--ink);margin-bottom:3px}
.qr-card{display:grid;gap:10px}
.wechat-qr{width:126px;height:126px;object-fit:contain;border:1px solid var(--line);border-radius:10px;background:#fff;padding:6px}
.qr-placeholder{height:126px;border:1px dashed #b9c8c5;border-radius:10px;background:var(--bg);
  display:grid;place-items:center;color:#8aa0a0;font-size:13px;margin-top:8px}

/* ===== Article ===== */
.article{padding:0}
.article-meta{color:var(--muted);font-size:13px;margin-bottom:18px;padding-bottom:16px;
  border-bottom:1px solid var(--line)}
.article-meta span{margin-right:16px}
.article-body h1{font-size:26px;font-weight:800;margin-bottom:16px;line-height:1.4}
.article-lead{background:var(--bg);border-left:4px solid var(--brand);border-radius:0 8px 8px 0;
    padding:14px 18px;color:#3c4a59;font-size:14.5px;margin-bottom:24px}
.article-photo{margin:22px 0 26px;border-radius:10px;overflow:hidden;background:var(--bg);border:1px solid var(--line)}
.article-photo img{width:100%;height:auto;display:block}
.article-photo figcaption{padding:10px 14px;color:var(--muted);font-size:13px;background:#fff}
.article-body h2{font-size:20px;margin:26px 0 12px;padding-left:12px;border-left:4px solid var(--accent)}
.article-body h3{font-size:16px;margin:18px 0 8px;color:var(--brand-d)}
.article-body p{color:#3c4a59;margin-bottom:12px;font-size:15px}
.article-product-links{background:var(--bg);border:1px solid var(--line);border-radius:10px;padding:14px 16px;margin:24px 0 0;font-size:14px;color:#3c4a59}
.article-product-links b{color:var(--ink);margin-right:8px}
.article-product-links a{color:var(--brand);font-weight:700;margin-right:12px}
.article-product-links a:hover{text-decoration:underline}
.article-company-note{background:#fff;border:1px solid var(--line);border-radius:10px;padding:16px 18px;margin:24px 0 0;color:#3c4a59;font-size:14.5px}
.article-company-note b{display:block;color:var(--ink);margin-bottom:4px}
.article-company-note a{color:var(--brand);font-weight:700}
.article-company-note a:hover{text-decoration:underline}
.article-cta{background:linear-gradient(135deg,#12394b,#1f6f78);color:#fff;border-radius:var(--radius);
  padding:24px 26px;margin-top:30px;display:flex;justify-content:space-between;align-items:center;
  flex-wrap:wrap;gap:14px}
.article-cta b{font-size:17px}
.article-cta p{font-size:13px;color:#cfe0f3;margin-top:2px}
.related{margin-top:30px;border-top:1px solid var(--line);padding-top:22px}
.related h3{font-size:18px;margin-bottom:14px}
.related ul{list-style:none}
.related li{margin-bottom:9px;font-size:14px}
.related a{color:var(--brand)}
.related a:hover{text-decoration:underline}
.related a::before{content:"› ";color:var(--accent);font-weight:800}

/* ===== News list ===== */
.news-intro{padding:46px 0 10px}
.news-intro h2{font-size:25px;margin-bottom:8px}
.news-intro p{color:var(--muted)}
.news-list{padding:24px 0 60px;display:grid;gap:18px}
.news-card{display:flex;gap:20px;background:#fff;border:1px solid var(--line);
  border-radius:var(--radius);padding:22px;transition:.25s}
.news-card:hover{box-shadow:var(--shadow);border-color:#c8d8d5;transform:translateY(-3px)}
.news-card .nthumb{flex:none;width:74px;height:74px;border-radius:12px;
  background:linear-gradient(135deg,#1f6f78,#164e59);color:#fff;display:grid;place-items:center}
.news-card .nthumb svg{width:34px;height:34px}
.news-card h3{font-size:17px;margin-bottom:6px}
.news-card:hover h3{color:var(--brand)}
.news-card p{color:var(--muted);font-size:13.5px;display:-webkit-box;
  -webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.news-card .nmore{color:var(--brand);font-size:13px;font-weight:700;margin-top:6px;display:inline-block}

/* ===== Footer ===== */
footer{background:#102832;color:#aebfc2;font-size:14px;margin-top:10px}
.foot-top{display:grid;grid-template-columns:1.4fr 1fr 1fr 1.3fr;gap:34px;padding:54px 0 38px}
footer h4{color:#fff;font-size:15px;margin-bottom:16px}
footer ul{list-style:none}
footer li{margin-bottom:9px}
footer a:hover{color:var(--accent)}
.foot-logo{display:flex;align-items:center;gap:12px;color:#fff;font-weight:800;font-size:18px;margin-bottom:14px}
.foot-bottom{border-top:1px solid rgba(255,255,255,.1);padding:18px 0;
  display:flex;justify-content:space-between;flex-wrap:wrap;gap:8px;font-size:13px}

/* ===== Float tel ===== */
.float-tel{position:fixed;right:20px;bottom:24px;z-index:60;background:var(--accent);
  color:#2f2107;font-weight:800;padding:12px 18px;border-radius:8px;
  box-shadow:0 8px 20px rgba(217,145,43,.28);display:flex;align-items:center;gap:8px}
.float-contact{position:fixed;right:20px;bottom:24px;z-index:70;display:flex;gap:8px;align-items:center}
.float-contact a,.float-contact button{border:0;border-radius:8px;padding:11px 14px;font-weight:800;
  box-shadow:0 8px 20px rgba(18,40,58,.16);font-family:inherit;cursor:pointer}
.float-contact a{background:var(--accent);color:#2f2107}
.float-contact .wechat-btn{background:#fff;color:var(--brand);border:1px solid var(--line)}

/* ===== 照片位 ===== */
.pd-banner img{position:absolute;inset:0;width:100%;height:100%;object-fit:cover;
  border-radius:var(--radius);z-index:2}
.pd-banner .note{z-index:1}
.pd-gallery{display:grid;grid-template-columns:1fr 1fr;gap:14px;margin-bottom:28px}
.pd-gallery figure{position:relative;height:158px;border-radius:8px;overflow:hidden;
  background:linear-gradient(135deg,#edf5f2,#dcebe7);display:grid;place-items:center}
.pd-gallery figure img{position:absolute;inset:0;width:100%;height:100%;object-fit:cover;z-index:2}
.pd-gallery figure span{color:#8aa0a0;font-size:12px;z-index:1}

/* ===== Responsive ===== */
@media(max-width:960px){
  .layout{grid-template-columns:1fr;gap:30px;padding:38px 0}
  .feature-grid{grid-template-columns:1fr}
  .company-fit-grid{grid-template-columns:1fr}
  .quick-facts,.decision-grid,.resource-grid,.order-grid,.quote-list,.case-grid,.trust-grid,.contact-tools{grid-template-columns:1fr}
  .pd-checklist{grid-template-columns:1fr}
  .foot-top{grid-template-columns:1fr 1fr}
  .page-hero h1{font-size:25px}
  .menu{position:fixed;inset:74px 0 auto 0;background:#fff;flex-direction:column;
    gap:0;padding:10px 0;border-bottom:1px solid var(--line);display:none}
  .menu.open{display:flex}
  .menu li{padding:12px 24px;border-bottom:1px solid var(--bg)}
  .burger{display:block}
  .nav-tel{display:none}
}
@media(max-width:560px){
  .foot-top{grid-template-columns:1fr}
  .news-card{flex-direction:column;gap:12px}
  .article-cta{flex-direction:column;align-items:flex-start}
  .float-contact{left:12px;right:12px;bottom:12px}
  .float-contact a,.float-contact button{flex:1;text-align:center;padding:10px 8px;font-size:13px}
}