/* ===== 华工人防官网 · 前台样式 ===== */
:root{
  --brand:#024a7c;        /* 主色 钢蓝 */
  --brand-d:#013357;      /* 深 */
  --brand-l:#1668a3;      /* 亮 */
  --brand-wash:#eef4f9;   /* 极浅底 */
  --accent:#e8821e;       /* 工业橙 强调/CTA */
  --accent-d:#c96c0d;
  --ink:#16202b;          /* 正文深色 */
  --gray:#5b6b7b;
  --line:#e3e9ef;
  --bg:#ffffff;
  --bg-soft:#f5f8fb;
  --radius:14px;
  --shadow:0 10px 34px rgba(2,53,87,.10);
  --shadow-sm:0 4px 16px rgba(2,53,87,.07);
  --maxw:1200px;
  --serif:"Noto Serif SC","Songti SC",Georgia,serif;
  --sans:-apple-system,BlinkMacSystemFont,"PingFang SC","Microsoft YaHei","Hiragino Sans GB",sans-serif;
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{margin:0;font-family:var(--sans);color:var(--ink);background:var(--bg);line-height:1.75;font-size:16px;-webkit-font-smoothing:antialiased}
img{max-width:100%;display:block}
a{color:inherit;text-decoration:none;transition:color .2s}
.container{max-width:var(--maxw);margin:0 auto;padding:0 24px}

/* ---------- 顶栏 ---------- */
.topbar{background:var(--brand-d);color:#cfe0ee;font-size:13px}
.topbar-inner{display:flex;justify-content:space-between;align-items:center;height:38px}
.topbar-right{display:flex;gap:20px;align-items:center}
.topbar-right b{color:#fff}
.topbar a{color:#cfe0ee}
.topbar a:hover{color:#fff}

/* ---------- 头部导航 ---------- */
.site-header{position:sticky;top:0;z-index:50;background:rgba(255,255,255,.96);backdrop-filter:blur(8px);border-bottom:1px solid var(--line);transition:box-shadow .3s}
.site-header.scrolled{box-shadow:0 6px 20px rgba(2,53,87,.08)}
.header-inner{display:flex;align-items:center;justify-content:space-between;height:78px}
.brand{display:flex;align-items:center;gap:14px}
.brand-logo{height:46px;width:auto}
.brand-mark{width:46px;height:46px;border-radius:10px;background:var(--brand);color:#fff;display:grid;place-items:center;font-weight:800;font-size:22px}
.brand-text strong{display:block;font-size:20px;letter-spacing:1px;color:var(--brand-d);font-family:var(--serif);font-weight:700}
.brand-text small{display:block;font-size:11.5px;color:var(--gray);letter-spacing:.5px}
.main-nav{display:flex;align-items:center;gap:6px}
.main-nav>a,.has-sub>a{padding:10px 15px;font-size:15.5px;font-weight:500;color:var(--ink);border-radius:8px;position:relative}
.main-nav>a:hover,.has-sub>a:hover{color:var(--brand)}
.main-nav>a::after{content:"";position:absolute;left:15px;right:15px;bottom:4px;height:2px;background:var(--brand);transform:scaleX(0);transition:transform .25s;transform-origin:left}
.main-nav>a:hover::after{transform:scaleX(1)}
.nav-cta{background:var(--accent);color:#fff!important;padding:10px 22px!important;border-radius:30px;font-weight:600}
.nav-cta:hover{background:var(--accent-d)}
.nav-cta::after{display:none}
.has-sub{position:relative}
.has-sub .sub{position:absolute;top:100%;left:0;background:#fff;border:1px solid var(--line);border-radius:10px;box-shadow:var(--shadow);min-width:200px;padding:8px;opacity:0;visibility:hidden;transform:translateY(8px);transition:.22s}
.has-sub:hover .sub{opacity:1;visibility:visible;transform:translateY(0)}
.has-sub .sub a{display:block;padding:9px 14px;border-radius:7px;font-size:14.5px;color:var(--gray)}
.has-sub .sub a:hover{background:var(--brand-wash);color:var(--brand)}
.nav-toggle{display:none;background:none;border:0;font-size:26px;color:var(--brand);cursor:pointer}

/* ---------- 通用区块 ---------- */
.section{padding:78px 0}
.section.soft{background:var(--bg-soft)}
.sec-head{text-align:center;max-width:680px;margin:0 auto 50px}
.sec-eyebrow{display:inline-block;color:var(--accent);font-weight:700;letter-spacing:3px;font-size:13px;text-transform:uppercase;margin-bottom:10px}
.sec-title{font-family:var(--serif);font-size:34px;font-weight:700;color:var(--brand-d);margin:0 0 14px;line-height:1.3}
.sec-sub{color:var(--gray);font-size:16px;margin:0}
.sec-title.left,.sec-head.left{text-align:left;margin-left:0}

.btn{display:inline-flex;align-items:center;gap:8px;background:var(--brand);color:#fff;padding:13px 30px;border-radius:30px;font-weight:600;font-size:15px;border:0;cursor:pointer;transition:.25s}
.btn:hover{background:var(--brand-d);transform:translateY(-2px);box-shadow:var(--shadow-sm)}
.btn.accent{background:var(--accent)}
.btn.accent:hover{background:var(--accent-d)}
.btn.ghost{background:transparent;border:1.5px solid #fff;color:#fff}
.btn.ghost:hover{background:#fff;color:var(--brand-d)}
.btn.outline{background:#fff;border:1.5px solid var(--brand);color:var(--brand)}
.btn.outline:hover{background:var(--brand);color:#fff}

/* ---------- 首页 Hero ---------- */
.hero{position:relative;color:#fff;overflow:hidden;background:linear-gradient(120deg,#02375c 0%,#024a7c 55%,#0a5e94 100%)}
.hero::before{content:"";position:absolute;inset:0;background-image:url('../images/grid.svg');opacity:.18}
.hero::after{content:"";position:absolute;right:-120px;top:-80px;width:520px;height:520px;background:radial-gradient(circle,rgba(232,130,30,.32),transparent 65%);}
.hero-inner{position:relative;display:grid;grid-template-columns:1.1fr .9fr;gap:48px;align-items:center;padding:96px 0 104px}
.hero-eyebrow{display:inline-flex;align-items:center;gap:8px;background:rgba(255,255,255,.12);border:1px solid rgba(255,255,255,.22);padding:7px 16px;border-radius:30px;font-size:13px;letter-spacing:1px;margin-bottom:22px}
.hero h1{font-family:var(--serif);font-size:48px;line-height:1.22;margin:0 0 20px;font-weight:700}
.hero h1 em{color:var(--accent);font-style:normal}
.hero p.lead{font-size:18px;color:#d6e6f2;margin:0 0 32px;max-width:560px}
.hero-actions{display:flex;gap:16px;flex-wrap:wrap}
.hero-visual{position:relative}
.hero-visual img{border-radius:18px;box-shadow:0 30px 60px rgba(0,0,0,.35);border:4px solid rgba(255,255,255,.1)}
.hero-badge{position:absolute;left:-26px;bottom:30px;background:#fff;color:var(--brand-d);border-radius:14px;padding:16px 22px;box-shadow:var(--shadow);display:flex;align-items:center;gap:14px}
.hero-badge .num{font-size:30px;font-weight:800;color:var(--accent);font-family:var(--serif)}
.hero-badge small{display:block;color:var(--gray);font-size:13px}

/* 数据条 */
.stats{background:var(--brand-d);color:#fff}
.stats-grid{display:grid;grid-template-columns:repeat(4,1fr);text-align:center;padding:44px 0}
.stats-grid .stat{border-right:1px solid rgba(255,255,255,.12)}
.stats-grid .stat:last-child{border:0}
.stats-grid .num{font-size:42px;font-weight:800;font-family:var(--serif);color:#fff}
.stats-grid .num span{color:var(--accent);font-size:24px}
.stats-grid .label{color:#a9c4d8;font-size:14px;margin-top:4px}

/* ---------- 产品卡 ---------- */
.grid{display:grid;gap:26px}
.grid-3{grid-template-columns:repeat(3,1fr)}
.grid-4{grid-template-columns:repeat(4,1fr)}
.grid-2{grid-template-columns:repeat(2,1fr)}
.product-card{background:#fff;border:1px solid var(--line);border-radius:var(--radius);overflow:hidden;transition:.3s;display:flex;flex-direction:column}
.product-card:hover{transform:translateY(-6px);box-shadow:var(--shadow);border-color:#cfe0ee}
.product-card .thumb{aspect-ratio:4/3;overflow:hidden;background:var(--bg-soft)}
.product-card .thumb img{width:100%;height:100%;object-fit:cover;transition:.5s}
.product-card:hover .thumb img{transform:scale(1.06)}
.product-card .body{padding:20px 22px 24px;flex:1;display:flex;flex-direction:column}
.product-card .cat{font-size:12px;color:var(--accent);font-weight:700;letter-spacing:1px}
.product-card h3{margin:8px 0 10px;font-size:19px;color:var(--brand-d)}
.product-card p{color:var(--gray);font-size:14px;margin:0 0 16px;flex:1}
.product-card .more{color:var(--brand);font-weight:600;font-size:14px}
.product-card .more::after{content:" →";transition:.2s}
.product-card:hover .more::after{margin-left:4px}

/* 分类标签 */
.filter{display:flex;flex-wrap:wrap;gap:12px;justify-content:center;margin-bottom:40px}
.filter a{padding:9px 22px;border-radius:30px;border:1px solid var(--line);font-size:14.5px;color:var(--gray);background:#fff}
.filter a.active,.filter a:hover{background:var(--brand);color:#fff;border-color:var(--brand)}

/* ---------- 关于（首页） ---------- */
.about-split{display:grid;grid-template-columns:1fr 1fr;gap:54px;align-items:center}
.about-split .imgs{display:grid;grid-template-columns:1fr 1fr;gap:14px}
.about-split .imgs img{border-radius:12px;height:100%;object-fit:cover;box-shadow:var(--shadow-sm)}
.about-split .imgs img:first-child{grid-row:span 2;height:100%}
.about-text p{color:var(--gray);margin:0 0 16px}
.feature-list{list-style:none;padding:0;margin:24px 0 0;display:grid;grid-template-columns:1fr 1fr;gap:14px}
.feature-list li{display:flex;gap:10px;align-items:flex-start;font-size:15px}
.feature-list .ic{flex:none;width:24px;height:24px;border-radius:50%;background:var(--brand-wash);color:var(--brand);display:grid;place-items:center;font-size:13px;font-weight:700}

/* ---------- 资质 ---------- */
.qual-card{background:#fff;border:1px solid var(--line);border-radius:12px;padding:14px;text-align:center;transition:.3s}
.qual-card:hover{box-shadow:var(--shadow);transform:translateY(-4px)}
.qual-card .pic{aspect-ratio:3/4;background:var(--bg-soft);border-radius:8px;overflow:hidden;display:grid;place-items:center}
.qual-card .pic img{width:100%;height:100%;object-fit:contain}
.qual-card h4{margin:14px 0 4px;font-size:15px;color:var(--brand-d)}
.qual-card .type{font-size:12px;color:var(--accent)}
.qual-card .dl{display:inline-block;margin-top:8px;font-size:12.5px;color:var(--brand)}

/* ---------- 案例 ---------- */
.case-card{position:relative;border-radius:var(--radius);overflow:hidden;min-height:320px;display:flex;align-items:flex-end;color:#fff}
.case-card img{position:absolute;inset:0;width:100%;height:100%;object-fit:cover;transition:.5s}
.case-card::after{content:"";position:absolute;inset:0;background:linear-gradient(transparent 30%,rgba(1,40,68,.92))}
.case-card:hover img{transform:scale(1.08)}
.case-card .meta{position:relative;padding:26px;z-index:2}
.case-card .meta .tag{font-size:12px;background:var(--accent);padding:4px 10px;border-radius:20px}
.case-card .meta h3{margin:12px 0 6px;font-size:20px}
.case-card .meta p{margin:0;font-size:13.5px;color:#cfe0ee}

/* ---------- 新闻 ---------- */
.news-card{background:#fff;border:1px solid var(--line);border-radius:var(--radius);overflow:hidden;transition:.3s;display:flex;flex-direction:column}
.news-card:hover{box-shadow:var(--shadow);transform:translateY(-4px)}
.news-card .thumb{aspect-ratio:16/9;overflow:hidden;background:var(--bg-soft)}
.news-card .thumb img{width:100%;height:100%;object-fit:cover;transition:.5s}
.news-card:hover .thumb img{transform:scale(1.06)}
.news-card .body{padding:20px 22px}
.news-card .date{font-size:12.5px;color:var(--accent);font-weight:600}
.news-card h3{margin:8px 0 10px;font-size:18px;color:var(--brand-d);line-height:1.45}
.news-card p{color:var(--gray);font-size:14px;margin:0}

/* CTA 区 */
.cta-band{background:linear-gradient(120deg,var(--brand),var(--brand-l));color:#fff;border-radius:20px;padding:50px;display:flex;align-items:center;justify-content:space-between;gap:30px;position:relative;overflow:hidden}
.cta-band::before{content:"";position:absolute;right:-60px;bottom:-60px;width:280px;height:280px;background:radial-gradient(circle,rgba(232,130,30,.35),transparent 65%)}
.cta-band h3{font-family:var(--serif);font-size:28px;margin:0 0 8px}
.cta-band p{margin:0;color:#d6e6f2}
.cta-band .right{position:relative;display:flex;gap:14px;flex-wrap:wrap}

/* ---------- 页内 banner ---------- */
.page-banner{background:linear-gradient(120deg,#02375c,#024a7c);color:#fff;padding:60px 0;position:relative;overflow:hidden}
.page-banner::before{content:"";position:absolute;inset:0;background-image:url('../images/grid.svg');opacity:.16}
.page-banner h1{position:relative;font-family:var(--serif);font-size:36px;margin:0 0 8px}
.page-banner .crumb{position:relative;color:#bcd4e6;font-size:14px}
.page-banner .crumb a{color:#bcd4e6}
.page-banner .crumb a:hover{color:#fff}

/* ---------- 详情正文（Markdown） ---------- */
.article-body{font-size:16.5px;color:#27333f;line-height:1.95}
.article-body h1,.article-body h2,.article-body h3,.article-body h4{font-family:var(--serif);color:var(--brand-d);line-height:1.4;margin:1.8em 0 .7em}
.article-body h2{font-size:25px;border-left:4px solid var(--accent);padding-left:14px}
.article-body h3{font-size:20px}
.article-body p{margin:0 0 1.1em}
.article-body img{border-radius:10px;margin:1.2em 0;box-shadow:var(--shadow-sm)}
.article-body ul,.article-body ol{padding-left:1.4em;margin:0 0 1.1em}
.article-body li{margin:.4em 0}
.article-body blockquote{margin:1.4em 0;padding:14px 20px;background:var(--brand-wash);border-left:4px solid var(--brand);border-radius:0 8px 8px 0;color:#33617f}
.article-body pre.code{background:#0f2535;color:#d6e6f2;padding:18px 20px;border-radius:10px;overflow:auto;font-size:14px;line-height:1.6;margin:1.2em 0}
.article-body code{background:#eef3f7;color:var(--brand-d);padding:2px 7px;border-radius:5px;font-size:.9em}
.article-body pre.code code{background:none;color:inherit;padding:0}
.article-body .table-wrap{overflow:auto;margin:1.3em 0}
.article-body table{width:100%;border-collapse:collapse;font-size:14.5px}
.article-body th{background:var(--brand);color:#fff;padding:11px 14px;text-align:left}
.article-body td{padding:10px 14px;border:1px solid var(--line)}
.article-body tr:nth-child(even) td{background:var(--bg-soft)}
.article-body .mermaid{text-align:center;margin:1.4em 0}
.article-body hr{border:0;border-top:1px dashed var(--line);margin:2em 0}

/* 详情布局 */
.detail-wrap{display:grid;grid-template-columns:1fr 320px;gap:46px;align-items:start}
.detail-main{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:40px}
.detail-main h1.title{font-family:var(--serif);font-size:30px;color:var(--brand-d);margin:0 0 14px;line-height:1.35}
.detail-meta{color:var(--gray);font-size:13.5px;border-bottom:1px solid var(--line);padding-bottom:18px;margin-bottom:26px;display:flex;gap:20px;flex-wrap:wrap}
.sidebar .widget{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:22px;margin-bottom:24px}
.sidebar .widget h4{margin:0 0 16px;font-size:17px;color:var(--brand-d);padding-bottom:10px;border-bottom:2px solid var(--brand-wash)}
.side-list a{display:flex;gap:12px;padding:10px 0;border-bottom:1px dashed var(--line);align-items:center}
.side-list a:last-child{border:0}
.side-list img{width:64px;height:48px;object-fit:cover;border-radius:6px;flex:none}
.side-list span{font-size:14px;color:var(--ink);line-height:1.5}
.side-list a:hover span{color:var(--brand)}
.prevnext{display:flex;justify-content:space-between;gap:20px;margin-top:30px;padding-top:24px;border-top:1px solid var(--line);font-size:14.5px}
.prevnext a:hover{color:var(--brand)}

/* 产品详情 */
.product-detail{display:grid;grid-template-columns:1fr 1fr;gap:46px;align-items:start}
.product-detail .gal img{border-radius:var(--radius);width:100%;box-shadow:var(--shadow-sm)}
.product-detail .info .cat{color:var(--accent);font-weight:700;letter-spacing:1px}
.product-detail .info h1{font-family:var(--serif);font-size:30px;color:var(--brand-d);margin:8px 0 6px}
.product-detail .info .model{color:var(--gray);font-size:14px;margin-bottom:18px}
.spec-table{width:100%;border-collapse:collapse;margin:20px 0;font-size:14.5px}
.spec-table td{padding:11px 14px;border:1px solid var(--line)}
.spec-table td:first-child{background:var(--bg-soft);font-weight:600;color:var(--brand-d);width:130px}

/* 联系 */
.contact-grid{display:grid;grid-template-columns:1fr 1.1fr;gap:46px}
.contact-info .item{display:flex;gap:16px;padding:18px 0;border-bottom:1px dashed var(--line)}
.contact-info .ic{flex:none;width:46px;height:46px;border-radius:12px;background:var(--brand-wash);color:var(--brand);display:grid;place-items:center;font-size:20px}
.contact-info h4{margin:0 0 4px;font-size:16px;color:var(--brand-d)}
.contact-info p{margin:0;color:var(--gray);font-size:14.5px}
.form-card{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:32px;box-shadow:var(--shadow-sm)}
.form-row{display:grid;grid-template-columns:1fr 1fr;gap:16px}
.form-field{margin-bottom:16px}
.form-field label{display:block;font-size:14px;font-weight:600;color:#334;margin-bottom:6px}
.form-field input,.form-field textarea{width:100%;padding:12px 14px;border:1px solid var(--line);border-radius:9px;font-size:15px;font-family:inherit}
.form-field input:focus,.form-field textarea:focus{outline:none;border-color:var(--brand);box-shadow:0 0 0 3px rgba(2,74,124,.12)}
.alert{padding:12px 16px;border-radius:9px;margin-bottom:18px;font-size:14.5px}
.alert.success{background:#ecfdf5;color:#047857}
.alert.error{background:#fef2f2;color:#b91c1c}

/* 相册 */
.gallery-group{margin-bottom:50px}
.gallery-group h3{font-family:var(--serif);font-size:22px;color:var(--brand-d);margin:0 0 22px;display:flex;align-items:center;gap:12px}
.gallery-group h3::before{content:"";width:5px;height:22px;background:var(--accent);border-radius:3px}
.masonry{columns:4;column-gap:16px}
.masonry img{width:100%;margin-bottom:16px;border-radius:10px;break-inside:avoid;box-shadow:var(--shadow-sm);cursor:pointer;transition:.3s}
.masonry img:hover{transform:scale(1.02);box-shadow:var(--shadow)}

/* 分页 */
.pager{display:flex;justify-content:center;gap:10px;margin-top:46px}
.pager a,.pager span{padding:9px 16px;border:1px solid var(--line);border-radius:8px;font-size:14px;color:var(--gray);background:#fff}
.pager a:hover{border-color:var(--brand);color:var(--brand)}
.pager .cur{background:var(--brand);color:#fff;border-color:var(--brand)}

/* 返回顶部 */
.back-top{position:fixed;right:26px;bottom:26px;width:48px;height:48px;border-radius:50%;background:var(--brand);color:#fff;display:grid;place-items:center;font-size:22px;box-shadow:var(--shadow);opacity:0;visibility:hidden;transform:translateY(10px);transition:.3s;cursor:pointer;z-index:60}
.back-top.show{opacity:1;visibility:visible;transform:translateY(0)}

/* 页脚 */
.site-footer{background:#0c2233;color:#9fb6c8;font-size:14.5px;margin-top:0}
.footer-grid{display:grid;grid-template-columns:1.6fr 1fr 1fr 1.4fr;gap:40px;padding:60px 0 46px}
.footer-brand{display:flex;align-items:center;gap:12px;margin-bottom:16px}
.footer-brand img{height:38px;background:#fff;border-radius:6px;padding:3px}
.footer-brand strong{color:#fff;font-size:16px;font-family:var(--serif)}
.footer-col h4{color:#fff;font-size:16px;margin:0 0 18px}
.footer-col a{display:block;padding:6px 0;color:#9fb6c8}
.footer-col a:hover{color:var(--accent)}
.footer-contact p{margin:6px 0}
.footer-bottom{border-top:1px solid rgba(255,255,255,.08);padding:18px 0;font-size:13px}
.footer-bottom .container{display:flex;justify-content:space-between;flex-wrap:wrap;gap:10px}
.footer-bottom a{color:#9fb6c8}

/* 动画 */
.reveal{opacity:0;transform:translateY(26px);transition:opacity .7s,transform .7s}
.reveal.in{opacity:1;transform:none}

/* ---------- 响应式 ---------- */
@media (max-width:980px){
  .hero-inner,.about-split,.detail-wrap,.product-detail,.contact-grid{grid-template-columns:1fr}
  .grid-4{grid-template-columns:repeat(2,1fr)}
  .stats-grid{grid-template-columns:repeat(2,1fr)}
  .masonry{columns:2}
  .hero-visual{display:none}
  .hero h1{font-size:36px}
}
@media (max-width:760px){
  .nav-toggle{display:block}
  .main-nav{position:fixed;top:116px;left:0;right:0;background:#fff;flex-direction:column;align-items:stretch;padding:14px 24px;gap:0;border-top:1px solid var(--line);box-shadow:var(--shadow);transform:translateY(-130%);transition:.3s;max-height:80vh;overflow:auto}
  .main-nav.open{transform:none}
  .main-nav>a,.has-sub>a{padding:13px 6px;border-bottom:1px solid var(--line)}
  .has-sub .sub{position:static;opacity:1;visibility:visible;transform:none;box-shadow:none;border:0;padding:0 0 8px 14px}
  .grid-3,.grid-2{grid-template-columns:1fr}
  .sec-title{font-size:27px}
  .cta-band{flex-direction:column;text-align:center;padding:34px}
  .section{padding:54px 0}
  .topbar-inner span:first-child{display:none}
}