/* HIHAUS static site — navy + brand orange, industrial B2B */
:root{--navy:#16283F;--navy2:#0F1C2E;--orange:#F1881B;--orange-d:#D9750B;--bg:#F6F8FA;--text:#1F2933;--muted:#5B6773;--line:#E3E8EE;--radius:10px}
*{margin:0;padding:0;box-sizing:border-box}
body{font-family:-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,"Helvetica Neue",Arial,sans-serif;color:var(--text);line-height:1.65;font-size:16px;background:#fff}
img{max-width:100%;height:auto;display:block}
a{color:var(--navy);text-decoration:none}
a:hover{color:var(--orange-d)}
.wrap{max-width:1200px;margin:0 auto;padding-left:20px;padding-right:20px}
.section{padding-top:56px;padding-bottom:56px}
.section-alt{background:var(--bg)}
h1{font-size:34px;line-height:1.25;color:var(--navy);margin-bottom:16px}
h2{font-size:26px;color:var(--navy);margin-bottom:20px}
h3{font-size:18px;color:var(--navy)}
.lead{font-size:18px;color:var(--muted);max-width:820px;margin-bottom:20px}
.btn{display:inline-block;padding:10px 22px;border-radius:6px;font-weight:600;font-size:15px;border:2px solid transparent;cursor:pointer;text-align:center}
.btn-accent{background:var(--orange);color:#fff!important;border-color:var(--orange)}
.btn-accent:hover{background:var(--orange-d);border-color:var(--orange-d)}
.btn-outline{border-color:var(--navy);color:var(--navy)!important;background:transparent}
.btn-outline:hover{border-color:var(--orange);color:var(--orange-d)!important}
.btn-ghost{border-color:#fff;color:#fff!important;background:rgba(255,255,255,.08)}
.btn-lg{padding:13px 28px;font-size:16px}
.btn-block{display:block;width:100%}
.cta-row{display:flex;gap:12px;flex-wrap:wrap;margin-top:18px}
.cta-sub{margin-top:10px;font-size:14px;color:var(--muted)}
.cta-center{text-align:center;margin-top:28px}
.more-link{margin-top:18px}
.more-link a{font-weight:600;color:var(--orange-d)}

/* header */
.site-header{background:#fff;border-bottom:1px solid var(--line);position:sticky;top:0;z-index:50}
.header-in{display:flex;align-items:center;gap:24px;height:66px}
.logo{display:inline-flex;align-items:center;height:28px;overflow:hidden}
.logo img{display:block;width:auto;height:28px;object-fit:contain}
.main-nav{display:flex;align-items:center;gap:22px;flex:1}
.main-nav>a,.dd-toggle{font-size:15px;font-weight:500;color:var(--navy);padding:8px 0}
/* 桌面导航的下拉指示器：用 CSS 三角替代 ▾ 字符（字符仅约 6px，几乎不可见） */
.dd-toggle .caret{display:inline-block;float:none;font-size:0;line-height:0;width:0;height:0;
  margin-left:6px;vertical-align:middle;border-left:5px solid transparent;border-right:5px solid transparent;
  border-top:6px solid var(--orange);transition:transform .2s}
.nav-dd{position:relative}
.dd-menu{display:none;position:absolute;top:100%;left:0;background:#fff;border:1px solid var(--line);border-radius:8px;box-shadow:0 8px 24px rgba(15,28,46,.12);min-width:220px;padding:8px;z-index:60}
.nav-dd:hover .dd-menu,.nav-dd:focus-within .dd-menu{display:block}
.dd-menu a{display:block;padding:7px 12px;font-size:14px;border-radius:5px;color:var(--text)}
.dd-menu a:hover{background:var(--bg);color:var(--orange-d)}
.dd-menu a.dd-l1{font-weight:600;color:var(--navy)}
.dd-menu a.dd-l2{padding-left:26px}
.header-cta{display:flex;align-items:center;gap:16px}
.header-phone{font-weight:600;color:var(--navy);font-size:15px;white-space:nowrap}
.nav-burger{display:none;background:none;border:0;cursor:pointer;padding:8px}
.nav-burger span{display:block;width:24px;height:2px;background:var(--navy);margin:5px 0;transition:transform .2s ease,opacity .2s ease}
.nav-burger[aria-expanded="true"] span:nth-child(1){transform:translateY(7px) rotate(45deg)}
.nav-burger[aria-expanded="true"] span:nth-child(2){opacity:0}
.nav-burger[aria-expanded="true"] span:nth-child(3){transform:translateY(-7px) rotate(-45deg)}

/* hero */
.hero{background-size:cover;background-position:center;position:relative}
.hero::before{content:"";position:absolute;inset:0;background:linear-gradient(90deg,rgba(15,28,46,.88) 20%,rgba(15,28,46,.55) 60%,rgba(15,28,46,.35))}
.hero-in{position:relative;display:grid;grid-template-columns:1.2fr .9fr;gap:40px;align-items:center;padding:72px 20px}
.hero-copy h1{color:#fff;font-size:40px}
.hero-copy p{color:rgba(255,255,255,.92);font-size:17px;margin-top:8px}
.hero-form{background:#fff;border-radius:12px;padding:24px;box-shadow:0 12px 40px rgba(0,0,0,.25)}
.trust-bar{background:var(--navy);padding:18px 0}
.stats-row{display:grid;grid-template-columns:repeat(auto-fit,minmax(140px,1fr));gap:16px;text-align:center}
.stat strong{display:block;font-size:24px;color:var(--orange)}
.stat span{font-size:13px;color:var(--muted)}
.trust-bar .stat span{color:rgba(255,255,255,.75)}

/* audiences */
.aud-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:20px}
.aud-card{border:1px solid var(--line);border-radius:var(--radius);padding:26px;background:#fff}
.aud-card ul{margin:14px 0 18px;padding-left:20px;color:var(--muted);font-size:15px}
.aud-card li{margin-bottom:6px}
.aud-sub{color:var(--muted);margin-top:4px}

/* category / product cards */
.cat-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:20px}
.cat-card{position:relative;border-radius:var(--radius);overflow:hidden;aspect-ratio:4/3;background:var(--navy)}
.cat-card img{width:100%;height:100%;object-fit:cover;opacity:.92;transition:transform .3s}
.cat-card:hover img{transform:scale(1.04)}
.cat-card span{position:absolute;left:0;right:0;bottom:0;padding:14px 16px;background:linear-gradient(transparent,rgba(15,28,46,.9));color:#fff;font-weight:600;font-size:17px}
.prod-grid{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:18px}
.prod-card{border:1px solid var(--line);border-radius:var(--radius);overflow:hidden;background:#fff;display:block}
.prod-card img{aspect-ratio:4/3;object-fit:cover;width:100%}
.prod-card span{display:block;padding:12px 14px;font-size:14px;font-weight:500;color:var(--text);line-height:1.4}
.prod-card:hover{border-color:var(--orange);box-shadow:0 6px 18px rgba(15,28,46,.08)}
.super-group{margin:34px 0 16px;display:flex;align-items:baseline;gap:12px}
.super-group a:hover{color:var(--orange-d)}
.grp-count{font-size:13px;color:var(--muted);font-weight:400}

/* 目录页：类目导览 + 精选 */
.cat-jump{display:flex;flex-wrap:wrap;gap:8px;margin-top:22px}
.cat-jump a{border:1px solid var(--line);border-radius:999px;padding:9px 14px;font-size:13px;min-height:42px;color:var(--navy);background:#fff;text-decoration:none;display:inline-flex;align-items:center;gap:7px}
.cat-jump a b{font-weight:500;font-size:12px;color:var(--muted)}
.cat-jump a:hover{border-color:var(--orange);color:var(--orange-d)}
.cat-block{padding:26px 0 8px;border-top:1px solid var(--line)}
.cat-block:first-of-type{border-top:0}
.cat-head{display:flex;align-items:center;gap:14px;margin-bottom:16px}
.cat-thumb{width:62px;height:62px;border-radius:10px;object-fit:cover;flex:0 0 auto;border:1px solid var(--line)}
.cat-title{flex:1 1 auto;min-width:0}
.cat-title h3{margin:0;font-size:18px}
.cat-title h3 a{color:var(--navy)}
.cat-title h3 a:hover{color:var(--orange-d)}
.cat-title .grp-count{display:block;margin-top:3px}
.cat-all{flex:0 0 auto;font-size:14px;font-weight:500;color:var(--orange-d);white-space:nowrap;border:1px solid var(--line);border-radius:999px;padding:8px 14px}
.cat-all:hover{border-color:var(--orange);background:var(--orange);color:#fff}

/* category hero */
.cat-hero{background-size:cover;background-position:center;position:relative;color:#fff}
.cat-hero::before{content:"";position:absolute;inset:0;background:rgba(15,28,46,.82)}
.cat-hero-in{position:relative;padding:64px 20px;max-width:1200px}
.cat-hero h1{color:#fff}
.cat-hero p{max-width:760px;color:rgba(255,255,255,.9);margin-bottom:20px}
.cat-hero .crumbs{color:rgba(255,255,255,.75);margin-bottom:14px}
.cat-hero .crumbs a{color:#fff}

/* breadcrumbs */
.crumbs{font-size:13.5px;color:var(--muted);padding:16px 0 0;display:flex;gap:8px;flex-wrap:wrap;align-items:center}
/* 分隔符：用 CSS chevron 替代 › 字符。该字符在多数西文字体里偏小且位于 x-height 上方，
   只调字号会让它更"浮"起来；改成 6×6 方框留两条边再旋转 45°，尺寸与位置都可控。
   颜色用 currentColor，深色 hero 上自动跟随白色。 */
.crumbs i{font-style:normal;font-size:0;line-height:0;flex:0 0 auto;
  width:7px;height:7px;border-top:1.8px solid currentColor;border-right:1.8px solid currentColor;
  transform:rotate(45deg);opacity:.7;margin:0 2px}
.crumbs span{color:var(--muted);min-width:0;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.crumbs a,.crumbs i{flex:0 0 auto}
.crumbs{flex-wrap:nowrap}

/* product page */
.prod-hero{display:grid;grid-template-columns:1.05fr .95fr;gap:40px;padding-top:26px;padding-bottom:36px}
.gallery-main{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:12px}
.gallery-main img{border-radius:8px;border:1px solid var(--line);width:100%;aspect-ratio:4/3;object-fit:cover;cursor:zoom-in}
.gallery-main img:first-child{grid-column:1/-1;aspect-ratio:16/10}
.prod-info h1{font-size:28px}
.prod-intro{color:var(--muted);margin-bottom:14px}
.badge-row{display:flex;gap:8px;flex-wrap:wrap;margin-bottom:16px}
.badge-row span{background:#FFF3E6;color:var(--orange-d);font-size:13px;font-weight:600;padding:5px 12px;border-radius:20px}
.trade-table{width:100%;border-collapse:collapse;margin-bottom:8px;font-size:14px}
.trade-table th{text-align:left;color:var(--muted);font-weight:500;padding:7px 10px;border-bottom:1px solid var(--line);width:38%}
.trade-table td{padding:7px 10px;border-bottom:1px solid var(--line);font-weight:500}
.spec-table{width:100%;border-collapse:collapse;font-size:15px}
.spec-table th,.spec-table td{padding:10px 14px;border-bottom:1px solid var(--line);text-align:left;vertical-align:top}
.spec-table th{width:32%;color:var(--muted);font-weight:500}
.spec-table tr:nth-child(odd){background:var(--bg)}
.prod-details{max-width:860px;color:var(--text)}
.feat-list{max-width:860px;padding-left:22px}
.feat-list li{margin-bottom:10px}
.sticky-cta{position:sticky;top:66px;z-index:40;background:#fff;border-bottom:1px solid var(--line);box-shadow:0 4px 14px rgba(15,28,46,.08);padding:10px 20px;display:none;align-items:center;justify-content:space-between;gap:16px}
.sticky-cta.show{display:flex}
.sticky-title{font-weight:600;color:var(--navy);font-size:15px;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.eng-cta{background:var(--navy);color:#fff;margin:16px 0 0}
.eng-in{display:flex;align-items:center;justify-content:space-between;gap:24px;padding:36px 20px}
.eng-cta h2{color:#fff;margin-bottom:6px}
.eng-cta p{color:rgba(255,255,255,.8)}
.mini-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:16px}
.mini-card{border:1px solid var(--line);border-radius:var(--radius);padding:18px;display:block}
.mini-card strong{display:block;color:var(--navy);margin-bottom:4px}
.mini-card span{font-size:13px;color:var(--muted)}
.mini-card:hover{border-color:var(--orange)}
.inquiry-box{display:grid;grid-template-columns:1fr 1fr;gap:36px;background:var(--navy);border-radius:14px;padding:36px;color:#fff}
.inquiry-box h2{color:#fff}
.inquiry-box p{color:rgba(255,255,255,.8)}

/* forms */
.quote-form input,.quote-form textarea,.quote-form select{width:100%;padding:11px 13px;border:1px solid var(--line);border-radius:6px;font-size:15px;font-family:inherit;margin-bottom:10px;background:#fff;color:var(--text)}
.quote-form input:focus,.quote-form textarea:focus{outline:2px solid var(--orange);border-color:var(--orange)}
.inquiry-box .quote-form input,.inquiry-box .quote-form textarea{border-color:rgba(255,255,255,.25)}
.form-note{font-size:13px;color:var(--muted);margin-top:8px;text-align:center}
.inquiry-box .form-note,.hero-form .form-note{color:rgba(255,255,255,.65)}
.hero-form .form-note{color:var(--muted)}
.form-error{display:block;margin-top:12px;font-size:13px;color:#f3d4d2;border-left:3px solid var(--orange);padding:8px 12px;background:rgba(179,50,44,.15);border-radius:4px}

/* article / case */
.article{max-width:860px;padding-top:10px;padding-bottom:30px}
.article h1{font-size:30px;margin-top:12px}
.article p{margin-bottom:16px}
.article h2{margin-top:30px}
.article figure{margin:20px 0}
.article figure img{border-radius:8px}
.case-meta{display:grid;grid-template-columns:auto auto 1fr;gap:28px;background:var(--bg);border-radius:var(--radius);padding:18px 22px;margin:20px 0 26px}
.case-meta label{display:block;font-size:12px;text-transform:uppercase;letter-spacing:.06em;color:var(--muted)}
.case-meta strong{font-size:16px;color:var(--navy)}
.chips{display:flex;gap:8px;flex-wrap:wrap;margin-top:2px}
.chip{background:#fff;border:1px solid var(--line);border-radius:16px;padding:3px 12px;font-size:13px;color:var(--navy)}
.case-cta{background:var(--navy);color:#fff;border-radius:14px;padding:32px;margin-top:36px}
.case-cta h2{color:#fff}
.case-cta p{color:rgba(255,255,255,.85)}
/* 深色底上的 outline 按钮：默认的 navy 边框+navy 字与 navy 背景亮度差为 0，完全不可见 */
.case-cta .btn-outline{border-color:rgba(255,255,255,.7);color:#fff!important;background:transparent}
.case-cta .btn-outline:hover{border-color:var(--orange);color:var(--orange)!important;background:rgba(255,255,255,.08)}

/* stats：自动适配 4-5 列 */
.stats-row{display:grid;grid-template-columns:repeat(auto-fit,minmax(140px,1fr));gap:16px;text-align:center}

/* post list */
.post-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:18px}

/* Insights：公司动态与指南 */
.insight-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:20px}
.insight-card{display:block;border:1px solid var(--line);border-radius:var(--radius);overflow:hidden;background:#fff;transition:border-color .2s,box-shadow .2s}
.insight-card:hover{border-color:var(--orange);box-shadow:0 6px 18px rgba(15,28,46,.08)}
.insight-card img{aspect-ratio:16/10;object-fit:cover;width:100%}
.ic-body{padding:16px 18px 18px}
.ic-cat{display:inline-block;font-size:12px;font-weight:500;letter-spacing:.04em;text-transform:uppercase;color:var(--orange-d);background:#fdf1ec;border-radius:999px;padding:3px 10px;margin-bottom:9px}
.ic-body strong{display:block;font-size:16px;line-height:1.35;color:var(--navy);margin-bottom:8px}
.ic-body p{font-size:13.5px;color:var(--muted);line-height:1.55;margin-bottom:10px}
.ic-date{font-size:12px;color:var(--muted)}
.insight-article .ic-cat{margin-top:10px}
.insight-meta{font-size:13px;color:var(--muted);margin-bottom:18px}
.insight-fig{margin:24px 0;border:1px solid var(--line);border-radius:10px;overflow:hidden;background:#fff}
.insight-fig img{width:100%;display:block}
.insight-fig figcaption{padding:10px 14px;font-size:12.5px;color:var(--muted);line-height:1.5}
.insight-hero{width:100%;border-radius:10px;margin-bottom:22px;aspect-ratio:16/9;object-fit:cover}
.insight-article .lead{font-size:17px}
/* 法务页 */
.legal{max-width:820px}
.legal h2{font-size:19px;margin-top:32px}
.legal p{font-size:16px;color:var(--text);line-height:1.7}
.legal-list{margin:0 0 16px 20px;padding:0}
.legal-list li{font-size:16px;line-height:1.7;margin-bottom:8px;color:var(--text)}
/* 分组只有一条时用横版大卡，避免三分栏留白 */
.insight-grid-single{grid-template-columns:1fr}
.insight-card.insight-feature{display:grid;grid-template-columns:minmax(0,42%) minmax(0,1fr);align-items:stretch}
.insight-card.insight-feature img{aspect-ratio:auto;height:100%;min-height:240px;object-fit:cover}
.insight-card.insight-feature .ic-body{padding:26px 30px;display:flex;flex-direction:column;justify-content:center}
.insight-card.insight-feature .ic-body strong{font-size:22px;margin-bottom:12px}
.insight-card.insight-feature .ic-body p{font-size:15px;max-width:620px}
/* 分页 */
.pager{display:flex;flex-wrap:wrap;gap:8px;justify-content:center;align-items:center;margin-top:34px}
.pager .pg{min-width:44px;height:44px;display:inline-flex;align-items:center;justify-content:center;padding:0 12px;border:1px solid var(--line);border-radius:8px;background:#fff;font-size:14px;color:var(--navy)}
.pager .pg:hover{border-color:var(--orange);color:var(--orange-d)}
.pager .pg-cur{background:var(--navy);border-color:var(--navy);color:#fff}
.pager .pg-nav{font-weight:500}
/* 分页的 ← → 同样是字符，改用 CSS 图形（尺寸/线宽/对齐可控） */
.pager .ar{display:inline-block;width:6px;height:6px;flex:0 0 auto;
  border-top:1.8px solid currentColor;border-right:1.8px solid currentColor}
.pager .ar-l{transform:rotate(-135deg);margin-right:8px}
.pager .ar-r{transform:rotate(45deg);margin-left:8px}

/* 三大产品入口（恢复旧站 What We Do 大图卡） */
.big-entry-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:20px}
.big-entry{display:block;border-radius:var(--radius);overflow:hidden;border:1px solid var(--line);background:#fff}
.big-entry img{aspect-ratio:4/3;object-fit:cover;width:100%;transition:transform .3s}
.big-entry:hover img{transform:scale(1.04)}
.be-body{padding:18px 20px}
.be-body h3{font-size:20px;margin-bottom:6px}
.be-body p{font-size:14px;color:var(--muted);margin-bottom:10px}
.be-link{font-size:14px;font-weight:600;color:var(--orange-d)}
.big-entry:hover{border-color:var(--orange)}
.cat-chips{display:flex;gap:10px;flex-wrap:wrap;margin-top:22px}
.cat-chips a{border:1px solid var(--line);border-radius:20px;padding:6px 16px;font-size:14px;color:var(--navy);background:#fff}
.cat-chips a:hover{border-color:var(--orange);color:var(--orange-d)}
.cat-chips a:last-child{border-style:dashed;color:var(--orange-d)}

/* 案例卡（带图版） */
.post-card{border:1px solid var(--line);border-radius:var(--radius);padding:0;display:block;background:#fff;overflow:hidden}
.post-card img{aspect-ratio:16/10;object-fit:cover;width:100%}
.pc-body{padding:16px 18px}
.pc-body strong{display:block;color:var(--navy);font-size:16px;margin-bottom:6px;line-height:1.4}
.pc-body span{font-size:13px;color:var(--muted)}
.post-card:hover{border-color:var(--orange);box-shadow:0 6px 18px rgba(15,28,46,.08)}

/* Who we are（旧站 About 区回归首页） */
.who-we-are{display:grid;grid-template-columns:1.05fr .95fr;gap:40px;align-items:center}
.who-imgs{display:grid;grid-template-columns:1fr 1fr;gap:14px}
.who-imgs{display:grid;grid-template-columns:1fr;gap:14px;align-content:center}
.who-imgs img{border-radius:var(--radius);aspect-ratio:16/9;object-fit:cover;width:100%}
.about-stats{margin:22px 0;border:1px solid var(--line);border-radius:var(--radius);padding:20px;background:#fff}

/* 认证机构 LOGO 墙 */
.cert-logo-wall{display:flex;gap:22px;flex-wrap:wrap;align-items:center;justify-content:center;background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:22px;margin-bottom:22px}
.cert-logo-wall img{height:52px;width:auto;object-fit:contain}

/* 页脚微信 */
.footer-wechat{margin-top:14px;display:flex;align-items:center;gap:10px}
.footer-wechat img{border-radius:6px;background:#fff;padding:4px}
.footer-wechat span{font-size:13px;color:rgba(255,255,255,.6)}

/* about / contact */
.about-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:28px;margin:26px 0}
.about-stats{background:var(--navy);border-radius:var(--radius);padding:26px}
/* 深蓝底上的说明文字不能用 --muted 灰（亮度差仅 0.11，读不清） */
.about-stats .stat span{color:rgba(255,255,255,.72)}
.cert-grid{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:18px}
.cert-grid figure{border:1px solid var(--line);border-radius:var(--radius);overflow:hidden;background:#fff}
.cert-grid img{aspect-ratio:3/4;object-fit:cover;object-position:top;cursor:zoom-in}
.cert-grid figcaption{padding:10px 12px;font-size:13px;color:var(--muted);text-align:center}
.cert-status{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:14px;margin-top:20px}
.cert-status .cs-item{min-width:0}
.cs-item{border:1px solid var(--line);border-left:3px solid var(--navy);border-radius:var(--radius);background:#fff;padding:14px 16px}
.cs-item b{display:block;font-size:15px;color:var(--navy);margin-bottom:4px}
.cs-item span{font-size:13.5px;color:var(--muted);line-height:1.5}
.cs-item.cs-pending{border-left-color:var(--orange)}
.cs-item.cs-pending b::after{content:"In progress";display:inline-block;margin-left:8px;font-size:11px;font-weight:500;color:#fff;background:var(--orange);border-radius:999px;padding:1px 8px;vertical-align:2px}
.client-row{display:flex;gap:36px;align-items:center;flex-wrap:wrap;justify-content:center;padding:12px 0}
.client-row img{height:56px;width:auto;filter:grayscale(20%)}
.contact-grid{display:grid;grid-template-columns:1fr 1.1fr;gap:36px;margin-top:24px}
.contact-card{border:1px solid var(--line);border-radius:var(--radius);padding:20px;margin-bottom:16px}
.contact-card h3{margin-bottom:8px}
.contact-form-box{background:var(--navy);border-radius:14px;padding:30px;color:#fff}
.contact-form-box h2{color:#fff}

/* apps */
.app-grid{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:18px}
.app-card{border-radius:var(--radius);overflow:hidden;border:1px solid var(--line);background:#fff}
.app-card img{aspect-ratio:4/3;object-fit:cover}
.app-card div{padding:14px 16px}
.app-card p{font-size:14.5px;color:var(--muted);margin-top:4px}

/* services / steps */
.svc-grid{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:16px;margin-bottom:36px}
.svc{display:flex;align-items:center;gap:12px;background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:14px 16px;font-size:14px;font-weight:500;color:var(--navy)}
.svc img{flex:none}
.steps{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:18px}
.steps>div{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:20px}
.steps b{display:inline-flex;align-items:center;justify-content:center;width:32px;height:32px;border-radius:50%;background:var(--orange);color:#fff;font-size:16px;margin-bottom:10px}
.steps p{font-size:14px;color:var(--muted);margin-top:6px}

/* faq */
.faq-list{max-width:860px}
.faq-item{border:1px solid var(--line);border-radius:8px;margin-bottom:10px;background:#fff}
.faq-item summary{padding:15px 18px;font-weight:600;color:var(--navy);cursor:pointer;list-style:none;position:relative}
.faq-item summary::after{content:"+";position:absolute;right:18px;color:var(--orange);font-size:20px}
.faq-item[open] summary::after{content:"−"}
.faq-item p{padding:0 18px 16px;color:var(--muted)}

/* faq 页：hero + 目录 + 分组 */
.faq-hero{background:var(--navy);color:#fff;padding:56px 0 48px;position:relative}
.faq-hero h1{color:#fff;margin-top:10px}
.faq-hero p{color:rgba(255,255,255,.85);max-width:680px;font-size:17px}
.faq-hero .crumbs{color:rgba(255,255,255,.7);padding-top:0}
.faq-hero .crumbs a{color:#fff}
#faqSearch{width:100%;max-width:560px;margin-top:22px;padding:13px 18px;border:0;border-radius:8px;font-size:16px;font-family:inherit;color:var(--text);background:#fff}
#faqSearch:focus{outline:3px solid var(--orange)}
.faq-layout{display:grid;grid-template-columns:250px 1fr;gap:40px;padding:44px 20px 20px;align-items:start}
.faq-side{position:sticky;top:86px}
.faq-nav{display:flex;flex-direction:column;gap:6px;margin-bottom:22px}
.faq-nav-link{display:flex;justify-content:space-between;align-items:center;padding:10px 14px;border-radius:8px;border:1px solid var(--line);font-size:14px;font-weight:600;color:var(--navy);background:#fff}
.faq-nav-link b{font-weight:400;font-size:12px;color:var(--muted);background:var(--bg);border-radius:12px;padding:1px 9px}
.faq-nav-link:hover{border-color:var(--orange);color:var(--orange-d)}
.faq-side-cta{padding:20px}
.faq-group{margin-bottom:36px}
.faq-group h2{font-size:21px;padding-bottom:10px;border-bottom:2px solid var(--orange);margin-bottom:16px}
.faq-group .faq-list{max-width:none}
.faq-item.hide{display:none}
.faq-group.hide{display:none}

/* 案例页 hero / 速览卡 */
.case-hero{background:var(--navy) center/cover no-repeat;position:relative;color:#fff}
.case-hero::before{content:"";position:absolute;inset:0;background:linear-gradient(180deg,rgba(15,28,46,.72),rgba(15,28,46,.88))}
.case-hero-in{position:relative;padding:52px 20px 56px;max-width:1200px}
.case-hero h1{color:#fff;font-size:32px;max-width:840px}
.case-hero .crumbs{color:rgba(255,255,255,.75);padding:0 0 14px}
.case-hero .crumbs a{color:#fff}
.case-hero-lead{color:rgba(255,255,255,.9);max-width:760px;font-size:17px}
.hero-chips{display:flex;gap:8px;flex-wrap:wrap;margin-bottom:14px}
.hero-chip{background:rgba(241,136,27,.16);border:1px solid rgba(241,136,27,.55);color:#FDBB74;font-size:12.5px;font-weight:600;padding:4px 12px;border-radius:14px;letter-spacing:.02em}
.case-body{padding-top:30px}
.case-glance{display:grid;grid-template-columns:repeat(auto-fit,minmax(180px,1fr));gap:0;border:1px solid var(--line);border-radius:var(--radius);background:#fff;overflow:hidden;margin-bottom:34px}
.glance-cell{padding:16px 20px;border-right:1px solid var(--line)}
.glance-cell:last-child{border-right:0}
.glance-cell label{display:block;font-size:11.5px;text-transform:uppercase;letter-spacing:.07em;color:var(--muted);margin-bottom:5px}
.glance-cell strong{font-size:15.5px;color:var(--navy)}

/* 案例正文：主栏 + 吸顶询盘 */
.story-layout{display:grid;grid-template-columns:1fr 320px;gap:44px;align-items:start}
.story-main p{margin-bottom:16px;color:var(--text)}
.story-h{font-size:21px;margin:30px 0 14px;padding-left:14px;border-left:4px solid var(--orange)}
.story-h:first-child{margin-top:0}
.story-sub{display:block;font-size:14px;font-weight:500;color:var(--orange-d);margin-top:3px}
.story-h3{font-size:17px;margin:22px 0 10px}
.story-list{list-style:none;margin:0 0 18px;padding:0}
.story-list li{position:relative;padding:7px 0 7px 30px;color:var(--text);border-bottom:1px dashed var(--line)}
.story-list li:last-child{border-bottom:0}
.story-list li::before{content:"✓";position:absolute;left:2px;top:7px;color:var(--orange);font-weight:700}
.case-side{position:sticky;top:86px}
.side-cta{border:1px solid var(--line);border-radius:var(--radius);padding:22px;background:#fff;box-shadow:0 4px 16px rgba(15,28,46,.06)}
.side-cta h3{margin-bottom:6px}
.side-cta p{font-size:14px;color:var(--muted);margin-bottom:14px}
.side-cta .btn{margin-bottom:8px}
.side-note{text-align:center;margin:4px 0 0;font-size:13px}
.side-note a{font-weight:600}

/* 案例图集 */
.case-gallery h2{margin-bottom:18px}
.gallery-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:14px}
.g-item{margin:0;border-radius:var(--radius);overflow:hidden;border:1px solid var(--line);background:#fff}
.g-item img{width:100%;aspect-ratio:4/3;object-fit:cover;cursor:zoom-in;transition:transform .3s}
.g-item:hover img{transform:scale(1.03)}
.g-item figcaption{padding:9px 13px;font-size:12.5px;color:var(--muted)}

/* 项目列表筛选 */
.filter-bar{display:flex;justify-content:space-between;align-items:center;gap:16px;flex-wrap:wrap;margin:22px 0 24px}
.filter-chips{display:flex;gap:8px;flex-wrap:wrap}
.filter-chip{border:1px solid var(--line);background:#fff;border-radius:20px;padding:10px 16px;min-height:42px;font-size:14px;font-weight:600;color:var(--navy);cursor:pointer;font-family:inherit}
.filter-chip b{font-weight:400;color:var(--muted);font-size:12.5px;margin-left:3px}
.filter-chip:hover{border-color:var(--orange)}
.filter-chip.active{background:var(--navy);border-color:var(--navy);color:#fff}
.filter-chip.active b{color:rgba(255,255,255,.7)}
#projectSearch{padding:11px 16px;border:1px solid var(--line);border-radius:20px;font-size:14px;font-family:inherit;min-width:260px;min-height:44px}
#projectSearch:focus{outline:2px solid var(--orange);border-color:var(--orange)}
.filter-empty{color:var(--muted);padding:30px 0;text-align:center}
.post-card.hide{display:none}
.pc-img{position:relative}
.seg-badge{position:absolute;left:10px;top:10px;background:rgba(15,28,46,.82);color:#fff;font-size:11.5px;font-weight:600;padding:3px 10px;border-radius:12px;letter-spacing:.02em}
.pc-chips{display:flex;gap:6px;flex-wrap:wrap;margin-top:9px}
.chip-sm{font-size:11.5px;padding:2px 9px;border-radius:12px}

/* 工厂页 */
.flow-steps{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:14px;counter-reset:step}
.flow-step{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:18px;position:relative}
.flow-step b{display:inline-flex;align-items:center;justify-content:center;width:30px;height:30px;border-radius:50%;background:var(--navy);color:#fff;font-size:14px;margin-bottom:9px}
.flow-step h3{font-size:15.5px;margin-bottom:4px}
.flow-step p{font-size:14.5px;color:var(--muted)}
.scene-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:18px}
.scene-grid-3{grid-template-columns:repeat(3,minmax(0,1fr))}
.scene-card{margin:0;border:1px solid var(--line);border-radius:var(--radius);overflow:hidden;background:#fff}
.scene-card img{width:100%;aspect-ratio:2/1;object-fit:cover;cursor:zoom-in;transition:transform .3s}
.scene-card:hover img{transform:scale(1.03)}
.scene-card figcaption{padding:14px 16px}
.scene-card figcaption strong{display:block;color:var(--navy);font-size:15px;margin-bottom:3px}
.scene-card figcaption span{font-size:13px;color:var(--muted);line-height:1.5;display:block}
.factory-visit{display:grid;grid-template-columns:1.2fr .8fr;gap:36px;align-items:center;background:var(--navy);border-radius:14px;padding:38px;color:#fff}
.factory-visit h2{color:#fff}
.factory-visit p{color:rgba(255,255,255,.85)}
.factory-addr{font-size:13.5px;margin-top:14px;color:rgba(255,255,255,.65)!important}
.factory-visit-cta{display:flex;flex-direction:column;gap:12px}
.factory-visit-cta .btn-outline{border-color:#fff;color:#fff!important}
.factory-visit-cta .btn-outline:hover{border-color:var(--orange);color:var(--orange)!important}
.about-hero-img{width:100%;max-height:440px;object-fit:cover;border-radius:12px;margin:6px 0 34px}

/* videos */
.video-list{margin:0 0 26px 20px}
.video-list li{margin-bottom:8px;color:var(--text)}

/* thanks / 404 */
.thanks-box{text-align:center;padding:90px 20px}
.thanks-box .lead{margin-left:auto;margin-right:auto}

/* footer */
.site-footer{background:var(--navy2);color:rgba(255,255,255,.75);margin-top:60px;padding:48px 0 90px}
.footer-grid{display:grid;grid-template-columns:1.2fr .7fr .7fr 1.2fr;gap:32px}
.footer-logo{margin-bottom:14px;filter:brightness(0) invert(1);opacity:.9}
.site-footer h3{color:#fff;font-size:15px;margin-bottom:12px}
.site-footer a{display:block;color:rgba(255,255,255,.75);font-size:14px;margin-bottom:8px}
.site-footer a:hover{color:var(--orange)}
.footer-grid p{font-size:14px}
.footer-form .quote-form input,.footer-form .quote-form textarea{background:rgba(255,255,255,.08);border-color:rgba(255,255,255,.2);color:#fff}
.footer-form .quote-form input::placeholder,.footer-form .quote-form textarea::placeholder{color:rgba(255,255,255,.5)}
.footer-form .form-note{color:rgba(255,255,255,.5)}
.footer-cert{margin-top:28px;padding-top:20px;border-top:1px solid rgba(255,255,255,.12);display:flex;gap:10px;flex-wrap:wrap}
.footer-cert span{font-size:12px;border:1px solid rgba(255,255,255,.25);border-radius:14px;padding:3px 12px;color:rgba(255,255,255,.65)}
.copyright{margin-top:16px;font-size:13px;color:rgba(255,255,255,.45)}

/* mobile bar */
.mobile-bar{display:none;position:fixed;bottom:0;left:0;right:0;background:#fff;border-top:1px solid var(--line);z-index:60}
.mobile-bar a{flex:1;text-align:center;padding:13px 0;font-weight:600;font-size:14px;color:var(--navy)}
.mobile-bar .mb-accent{background:var(--orange);color:#fff}

@media (max-width:960px){
  .hero-in{grid-template-columns:1fr;padding:48px 20px}
  .hero-copy h1{font-size:30px}
  .aud-grid,.cat-grid,.post-grid{grid-template-columns:1fr 1fr}
  .big-entry-grid,.who-we-are{grid-template-columns:1fr}
  .who-imgs{grid-template-columns:1fr 1fr}
  .who-imgs img{aspect-ratio:1/1}
  .prod-grid,.cert-grid,.app-grid,.svc-grid,.steps{grid-template-columns:1fr 1fr}
  .prod-hero,.inquiry-box,.contact-grid{grid-template-columns:1fr}
  .footer-grid{grid-template-columns:1fr 1fr}
  .case-meta{grid-template-columns:1fr 1fr}
  .faq-layout{grid-template-columns:1fr}
  .faq-side{position:static}
  .faq-nav{flex-direction:row;flex-wrap:wrap}
  .story-layout{grid-template-columns:1fr}
  .case-side{position:static}
  .gallery-grid,.scene-grid,.scene-grid-3{grid-template-columns:1fr 1fr}
  .flow-steps{grid-template-columns:1fr 1fr}
  .factory-visit{grid-template-columns:1fr;padding:28px}
  .cert-status{grid-template-columns:1fr 1fr}
  .about-grid{grid-template-columns:1fr}
  .insight-grid{grid-template-columns:1fr 1fr}
  .insight-card.insight-feature{grid-template-columns:1fr}
  .insight-card.insight-feature img{min-height:0;aspect-ratio:16/9;height:auto}
  .case-glance{grid-template-columns:1fr 1fr}
  .glance-cell{border-bottom:1px solid var(--line)}
  .main-nav{display:none;position:fixed;top:66px;left:0;right:0;bottom:0;max-height:calc(100dvh - 66px);background:#fff;flex-direction:column;align-items:stretch;padding:4px 20px 100px;gap:0;overflow-y:auto;-webkit-overflow-scrolling:touch;z-index:70;box-shadow:0 16px 32px rgba(15,28,46,.18)}
  .main-nav.open{display:flex}
  .main-nav>a,.main-nav .dd-toggle{display:block;padding:13px 2px;font-size:16px;border-bottom:1px solid var(--line)}
  .nav-dd .dd-toggle{position:relative;padding-right:30px}
  /* 用 CSS 三角替代 ▾ 字符：字符在 16px 下仅约 8px 宽，视觉上几乎不可见 */
  .dd-toggle .caret{position:absolute;right:4px;top:50%;float:none;font-size:0;line-height:0;
    width:0;height:0;margin-top:-4px;border-left:7px solid transparent;border-right:7px solid transparent;
    border-top:8px solid var(--orange);transition:transform .2s;transform-origin:50% 35%}
  .nav-dd.open .dd-toggle .caret{transform:rotate(180deg)}
  .nav-dd .dd-menu,.nav-dd:hover .dd-menu,.nav-dd:focus-within .dd-menu{display:none;position:static;border:0;box-shadow:none;padding:0 0 4px 14px}
  .nav-dd.open .dd-menu{display:block}
  .nav-dd .dd-menu a{padding:9px 12px;font-size:14.5px}
  .nav-dd .dd-menu a.dd-all{color:var(--orange-d);font-weight:600}
  body.nav-open{overflow:hidden}
  .nav-burger{display:block;margin-left:auto;margin-right:-8px}  /* 抵掉按钮自身 8px 内边距，与 logo 左边距对齐 */
  .header-cta{display:none}
  .header-phone{display:none}
  .mobile-bar{display:flex}
  body{padding-bottom:52px}
  h1{font-size:27px}
  /* 触控友好：导航型链接加大可点高度 */
  .site-footer a{display:block;padding:8px 0;margin-bottom:2px}
  .site-footer .footer-logo{display:inline-block;padding:0}
  .crumbs a{display:inline-block;padding:6px 0}
  /* 面包屑：手机只显示上级路径。当前页标题紧接在下方 h1 重复出现，
     保留会占 2–3 行并把分隔符悬挂在行尾；BreadcrumbList 结构化数据不受影响。 */
  .crumbs{flex-wrap:nowrap;gap:6px;overflow:hidden}
  .crumbs a{flex:0 0 auto;white-space:nowrap}
  .crumbs span{display:none}
  .crumbs i:last-of-type{display:none}
  /* iOS Safari 在输入框字号 <16px 时会自动放大页面 */
  .quote-form input,.quote-form textarea,.quote-form select,#projectSearch{font-size:16px}
  .footer-cert span{padding:6px 12px}
}
@media (max-width:600px){
  .header-cta .btn{display:none}
  .aud-grid,.cat-grid,.post-grid,.cert-grid,.app-grid,.svc-grid,.steps{grid-template-columns:1fr}
  .prod-grid{grid-template-columns:1fr 1fr;gap:12px}
  /* 产品图集：手机端横向滑动，首屏能露出标题与关键信息 */
  .prod-gallery{min-width:0}
  .gallery-main{display:flex;min-width:0;overflow-x:auto;scroll-snap-type:x mandatory;gap:10px;
    -webkit-overflow-scrolling:touch;scrollbar-width:none;padding-bottom:2px}
  .gallery-main::-webkit-scrollbar{display:none}
  .gallery-main img,.gallery-main img:first-child{flex:0 0 auto;width:min(80vw,320px);aspect-ratio:4/3;scroll-snap-align:start}
  .cat-block .prod-grid a:nth-child(3){display:none}
  .cat-head{flex-wrap:wrap;gap:10px}
  .cat-all{margin-left:74px}
  .cat-thumb{width:52px;height:52px}
  .cat-jump a{font-size:12.5px;padding:6px 12px}
  .stats-row{grid-template-columns:1fr 1fr}
  .case-meta{grid-template-columns:1fr}
  .mini-grid{grid-template-columns:1fr}
  .footer-grid{grid-template-columns:1fr}
  .gallery-grid,.scene-grid,.scene-grid-3,.flow-steps{grid-template-columns:1fr}
  .case-glance{grid-template-columns:1fr}
  .cert-status{grid-template-columns:1fr}
  .insight-grid{grid-template-columns:1fr}
  .insight-card.insight-feature .ic-body{padding:18px 20px}
  .cta-row{flex-direction:column;align-items:stretch}
  .cta-row .btn{width:100%;text-align:center}
  .filter-bar{flex-direction:column;align-items:stretch}
  #projectSearch{min-width:0}
}

/* 视频页：点击才加载播放器 */
.video-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:20px}
.video-card{margin:0;border:1px solid var(--line);border-radius:var(--radius);overflow:hidden;background:#fff}
.vc-facade{position:relative;display:block;width:100%;padding:0;border:0;background:#0f1c2e;cursor:pointer;line-height:0}
.vc-facade img{width:100%;aspect-ratio:16/9;object-fit:cover;opacity:.92;transition:opacity .2s,transform .3s}
.vc-facade:hover img{opacity:1;transform:scale(1.02)}
.vc-play{position:absolute;top:50%;left:50%;width:56px;height:56px;margin:-28px 0 0 -28px;border-radius:50%;background:rgba(232,106,42,.92);box-shadow:0 4px 14px rgba(0,0,0,.25)}
.vc-play::after{content:"";position:absolute;top:50%;left:50%;margin:-11px 0 0 -7px;border-style:solid;border-width:11px 0 11px 18px;border-color:transparent transparent transparent #fff}
.vc-facade:hover .vc-play{background:var(--orange)}
.video-card iframe{width:100%;aspect-ratio:16/9;border:0;display:block}
.video-card figcaption{padding:13px 16px 16px}
.vc-tag{display:inline-block;font-size:11.5px;font-weight:500;letter-spacing:.04em;text-transform:uppercase;color:var(--orange-d);background:#fdf1ec;border-radius:999px;padding:2px 9px;margin-bottom:8px}
.video-card figcaption strong{display:block;font-size:15px;line-height:1.35;color:var(--navy);margin-bottom:6px}
.video-card figcaption span{font-size:13px;color:var(--muted);line-height:1.5}
@media (max-width:960px){.video-grid{grid-template-columns:1fr 1fr}}
@media (max-width:600px){.video-grid{grid-template-columns:1fr}}