@charset "utf-8";
/* 德州鑫宏土工材料有限公司 - 稳重商务深蓝企业模板 */

:root{
  --brand:#0E2F5A;
  --brand-2:#16477F;
  --brand-3:#2E6CB5;
  --brand-soft:#EEF3F9;
  --accent:#C9822B;
  --accent-2:#E0A458;
  --ink:#1B2531;
  --ink-2:#3A4655;
  --muted:#5A6675;
  --line:#E4E9F0;
  --line-2:#D3DBE6;
  --bg:#FFFFFF;
  --soft:#F5F7FA;
  --radius:8px;
  --radius-lg:12px;
  --wrap:1200px;
  --font:-apple-system,BlinkMacSystemFont,"PingFang SC","Microsoft YaHei","Hiragino Sans GB","Source Han Sans SC","Noto Sans CJK SC",Arial,sans-serif;
}

*{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;}
body{
  margin:0;background:var(--bg);color:var(--ink);
  font-family:var(--font);font-size:15px;line-height:1.8;
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;height:auto;display:block;border:0;}
a{color:var(--brand-2);text-decoration:none;transition:color .2s;}
a:hover{color:var(--accent);}
h1,h2,h3,h4,h5,h6{margin:0 0 .6em;line-height:1.4;font-weight:600;color:var(--brand);}
p{margin:0 0 1em;}
ul,ol{margin:0 0 1em;padding-left:1.4em;}
table{border-collapse:collapse;width:100%;margin:0 0 1.2em;font-size:14px;}
table th,table td{border:1px solid var(--line-2);padding:10px 12px;text-align:left;vertical-align:top;}
table th{background:var(--brand-soft);color:var(--brand);font-weight:600;white-space:nowrap;}
hr{border:0;border-top:1px solid var(--line);margin:28px 0;}

.wrap{max-width:var(--wrap);margin:0 auto;padding:0 16px;}
.sr-only{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0 0 0 0);white-space:nowrap;border:0;}

/* ---------- 顶部条 ---------- */
.topbar{background:var(--brand);color:#CFDCEC;font-size:13px;}
.topbar .wrap{display:flex;flex-wrap:wrap;gap:8px 24px;align-items:center;justify-content:space-between;min-height:38px;padding-top:6px;padding-bottom:6px;}
.topbar a{color:#CFDCEC;}
.topbar a:hover{color:#fff;}
.topbar .tb-right span{margin-left:18px;white-space:nowrap;}

/* ---------- 头部导航 ---------- */
.site-header{background:#fff;border-bottom:1px solid var(--line);position:relative;z-index:60;}
.hd-main{display:flex;align-items:center;justify-content:space-between;gap:20px;padding:14px 0;}
.logo{display:flex;align-items:center;gap:12px;flex:0 0 auto;}
.logo img{height:48px;width:auto;}
.logo-txt{line-height:1.2;}
.logo-txt b{display:block;font-size:20px;color:var(--brand);letter-spacing:.5px;}
.logo-txt span{display:block;font-size:12px;color:var(--muted);letter-spacing:2px;}

.nav{display:flex;align-items:center;gap:2px;flex-wrap:wrap;}
.nav>li{position:relative;list-style:none;}
.nav>li>a{display:block;padding:12px 16px;font-size:15px;color:var(--ink);font-weight:500;}
.nav>li>a:hover,.nav>li.on>a{color:var(--brand-2);}
.nav>li.on>a::after{content:"";display:block;height:2px;background:var(--brand-2);margin-top:4px;}
.sub-menu{display:none;position:absolute;top:100%;left:0;min-width:190px;background:#fff;border:1px solid var(--line);border-top:2px solid var(--brand-2);box-shadow:0 8px 24px rgba(14,47,90,.10);padding:6px 0;list-style:none;margin:0;z-index:70;}
.nav>li:hover .sub-menu{display:block;}
.sub-menu li a{display:block;padding:9px 18px;font-size:14px;color:var(--ink-2);white-space:nowrap;}
.sub-menu li a:hover{background:var(--brand-soft);color:var(--brand-2);}
.nav-toggle{display:none;background:var(--brand);color:#fff;border:0;border-radius:6px;padding:8px 14px;font-size:15px;cursor:pointer;}

/* ---------- 首屏 ---------- */
.hero{position:relative;background:var(--brand);color:#fff;overflow:hidden;}
.hero-bg{position:absolute;inset:0;background-size:cover;background-position:center;opacity:.28;}
.hero .wrap{position:relative;padding:78px 16px 72px;}
.hero h1{color:#fff;font-size:38px;line-height:1.35;margin-bottom:16px;font-weight:600;}
.hero .lead{font-size:17px;color:#D3E0F0;max-width:760px;margin-bottom:26px;}
.hero-meta{display:flex;flex-wrap:wrap;gap:10px 28px;margin-bottom:28px;font-size:14px;color:#B9CCE4;}
.hero-meta span b{color:#fff;font-weight:600;}
.btn{display:inline-block;padding:12px 30px;border-radius:var(--radius);font-size:15px;font-weight:500;transition:all .2s;}
.btn-primary{background:var(--accent);color:#fff;}
.btn-primary:hover{background:var(--accent-2);color:#fff;}
.btn-ghost{border:1px solid rgba(255,255,255,.6);color:#fff;margin-left:10px;}
.btn-ghost:hover{background:rgba(255,255,255,.12);color:#fff;}
.btn-block{display:block;width:100%;text-align:center;}

/* ---------- 通用区块 ---------- */
.section{padding:56px 0;}
.section-soft{background:var(--soft);}
.sec-head{text-align:center;margin-bottom:34px;}
.sec-head h2{font-size:28px;margin-bottom:8px;}
.sec-head p{color:var(--muted);font-size:15px;margin:0;}
.sec-head .eyebrow{display:inline-block;font-size:13px;letter-spacing:2px;color:var(--accent);margin-bottom:8px;}
.sec-head-l{text-align:left;margin-bottom:24px;}
.sec-head-l h2{font-size:24px;}

/* ---------- 数据条 ---------- */
.facts{background:var(--brand-2);color:#fff;padding:34px 0;}
.facts .wrap{display:grid;grid-template-columns:repeat(4,1fr);gap:16px;text-align:center;}
.facts b{display:block;font-size:30px;line-height:1.2;color:#fff;}
.facts span{font-size:13px;color:#C3D5EC;}

/* ---------- 产品卡片 ---------- */
.grid{display:grid;gap:22px;}
.g4{grid-template-columns:repeat(4,1fr);}
.g3{grid-template-columns:repeat(3,1fr);}
.g2{grid-template-columns:repeat(2,1fr);}
.card{background:#fff;border:1px solid var(--line);border-radius:var(--radius-lg);overflow:hidden;transition:transform .2s,box-shadow .2s,border-color .2s;}
.card:hover{transform:translateY(-3px);box-shadow:0 10px 26px rgba(14,47,90,.10);border-color:var(--line-2);}
.card-thumb{position:relative;aspect-ratio:4/3;background:var(--brand-soft);overflow:hidden;}
.card-thumb img{width:100%;height:100%;object-fit:cover;}
.card-body{padding:16px 18px 18px;}
.card-body h3{font-size:17px;margin-bottom:6px;}
.card-body h3 a{color:var(--brand);}
.card-body p{font-size:14px;color:var(--muted);margin-bottom:10px;}
.card-more{font-size:14px;color:var(--brand-2);}
.tag{display:inline-block;font-size:12px;padding:2px 8px;border-radius:4px;background:var(--brand-soft);color:var(--brand-2);margin-right:6px;}

/* ---------- 内容正文（GEO 结构化排版） ---------- */
.article-body{font-size:16px;line-height:1.9;color:var(--ink-2);}
.article-body h2{font-size:23px;margin-top:38px;padding-left:12px;border-left:4px solid var(--brand-2);}
.article-body h3{font-size:19px;margin-top:26px;color:var(--brand-2);}
.article-body p{margin-bottom:1.05em;}
.article-body ul li,.article-body ol li{margin-bottom:.4em;}
.article-body strong{color:var(--brand);}
.answer-box{background:var(--brand-soft);border-left:4px solid var(--brand-2);padding:16px 20px;border-radius:0 var(--radius) var(--radius) 0;margin:0 0 22px;}
.answer-box p:last-child{margin-bottom:0;}
.notice{background:#FFF8EF;border-left:4px solid var(--accent);padding:14px 18px;font-size:14px;color:#7A5320;border-radius:0 var(--radius) var(--radius) 0;}

/* ---------- 列表页 ---------- */
.crumb{font-size:13px;color:var(--muted);padding:16px 0 6px;}
.crumb a{color:var(--muted);}
.crumb a:hover{color:var(--brand-2);}
.page-head{background:var(--brand);color:#fff;padding:38px 0;}
.page-head h1{color:#fff;font-size:30px;margin-bottom:6px;}
.page-head p{margin:0;color:#C3D5EC;font-size:15px;}

.list-item{display:flex;gap:18px;padding:20px 0;border-bottom:1px solid var(--line);}
.list-item:last-child{border-bottom:0;}
.list-item .li-thumb{flex:0 0 200px;}
.list-item .li-thumb img{width:200px;height:140px;object-fit:cover;border-radius:var(--radius);}
.list-item h3{font-size:18px;margin-bottom:6px;}
.list-item .li-desc{font-size:14px;color:var(--muted);margin-bottom:8px;}
.list-item .li-meta{font-size:13px;color:#8A94A2;}

/* ---------- 侧边栏 ---------- */
.layout{display:grid;grid-template-columns:1fr 300px;gap:34px;align-items:start;}
.side-box{background:#fff;border:1px solid var(--line);border-radius:var(--radius-lg);padding:20px;margin-bottom:22px;}
.side-box h3{font-size:17px;padding-bottom:10px;border-bottom:1px solid var(--line);margin-bottom:14px;}
.side-list{list-style:none;margin:0;padding:0;}
.side-list li{padding:8px 0;border-bottom:1px dashed var(--line);font-size:14px;}
.side-list li:last-child{border-bottom:0;}
.side-list a{color:var(--ink-2);}
.side-nav{list-style:none;margin:0;padding:0;}
.side-nav li a{display:block;padding:10px 14px;border-radius:6px;font-size:14px;color:var(--ink-2);}
.side-nav li a:hover,.side-nav li.on a{background:var(--brand);color:#fff;}

/* ---------- 产品详情 ---------- */
.pd-top{display:grid;grid-template-columns:460px 1fr;gap:38px;align-items:start;}
.pd-gallery{border:1px solid var(--line);border-radius:var(--radius-lg);overflow:hidden;background:var(--soft);}
.pd-gallery img{width:100%;}
.pd-title h1{font-size:28px;margin-bottom:10px;}
.pd-sub{color:var(--muted);font-size:15px;margin-bottom:16px;}
.pd-spec{width:100%;font-size:14px;}
.pd-contact{background:var(--brand-soft);border-radius:var(--radius);padding:16px 18px;margin-top:18px;font-size:14px;}
.pd-contact b{color:var(--brand);}

/* ---------- FAQ 折叠 ---------- */
.faq-item{border:1px solid var(--line);border-radius:var(--radius-lg);margin-bottom:14px;background:#fff;overflow:hidden;}
.faq-item summary{cursor:pointer;padding:16px 20px;font-size:17px;font-weight:600;color:var(--brand);list-style:none;display:flex;justify-content:space-between;align-items:center;gap:12px;}
.faq-item summary::-webkit-details-marker{display:none;}
.faq-item summary::after{content:"+";font-size:22px;color:var(--brand-3);line-height:1;}
.faq-item[open] summary::after{content:"−";}
.faq-item .faq-a{padding:0 20px 18px;font-size:15px;color:var(--ink-2);}
.faq-item .faq-a p:last-child{margin-bottom:0;}

/* ---------- 分页 ---------- */
.pager{display:flex;flex-wrap:wrap;gap:8px;justify-content:center;margin:34px 0 0;}
.pager a{padding:7px 14px;border:1px solid var(--line-2);border-radius:6px;font-size:14px;color:var(--ink-2);background:#fff;}
.pager a:hover{border-color:var(--brand-2);color:var(--brand-2);}

/* ---------- 表单 ---------- */
.form-row{margin-bottom:14px;}
.form-row label{display:block;font-size:14px;margin-bottom:6px;color:var(--ink-2);}
.form-row input,.form-row textarea,.form-row select{
  width:100%;padding:10px 12px;border:1px solid var(--line-2);border-radius:6px;font-size:14px;
  font-family:var(--font);background:#fff;color:var(--ink);
}
.form-row input:focus,.form-row textarea:focus{outline:0;border-color:var(--brand-3);}
.code-img{height:42px;cursor:pointer;border:1px solid var(--line-2);border-radius:6px;}
.btn-submit{background:var(--brand);color:#fff;border:0;padding:11px 34px;border-radius:6px;font-size:15px;cursor:pointer;}
.btn-submit:hover{background:var(--brand-2);}

/* ---------- 联系条 ---------- */
.cta-bar{background:var(--brand);color:#fff;padding:44px 0;}
.cta-bar .wrap{display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:20px;}
.cta-bar h2{color:#fff;font-size:26px;margin-bottom:6px;}
.cta-bar p{margin:0;color:#C3D5EC;font-size:15px;}

/* ---------- 页脚 ---------- */
.site-footer{background:#0A2444;color:#A9BCD4;font-size:14px;padding:46px 0 0;margin-top:0;}
.ft-grid{display:grid;grid-template-columns:1.6fr 1fr 1fr 1.2fr;gap:30px;padding-bottom:30px;}
.site-footer h4{color:#fff;font-size:16px;margin-bottom:14px;font-weight:600;}
.site-footer ul{list-style:none;margin:0;padding:0;}
.site-footer li{padding:5px 0;}
.site-footer a{color:#A9BCD4;}
.site-footer a:hover{color:#fff;}
.ft-contact p{margin-bottom:6px;}
.ft-bottom{border-top:1px solid rgba(255,255,255,.12);padding:16px 0;font-size:13px;color:#8FA3BD;}
.ft-bottom .wrap{display:flex;flex-wrap:wrap;gap:10px 20px;justify-content:space-between;}

/* ---------- 返回顶部 ---------- */
.to-top{position:fixed;right:22px;bottom:34px;width:44px;height:44px;line-height:44px;text-align:center;
  background:var(--brand);color:#fff;border-radius:6px;font-size:20px;display:none;z-index:80;}
.to-top:hover{background:var(--brand-2);color:#fff;}

/* ---------- 响应式 ---------- */
@media (max-width:1100px){
  .g4{grid-template-columns:repeat(2,1fr);}
  .layout{grid-template-columns:1fr;}
  .pd-top{grid-template-columns:1fr;}
  .ft-grid{grid-template-columns:1fr 1fr;}
}
@media (max-width:860px){
  .nav{display:none;width:100%;flex-direction:column;align-items:stretch;padding:8px 0 14px;}
  .nav.show{display:flex;}
  .nav>li>a{padding:11px 4px;border-bottom:1px solid var(--line);}
  .sub-menu{display:none!important;position:static;box-shadow:none;border:0;border-top:0;padding-left:14px;}
  .nav-toggle{display:block;}
  .hd-main{flex-wrap:wrap;}
  .hero .wrap{padding:52px 16px 48px;}
  .hero h1{font-size:26px;}
  .hero .lead{font-size:15px;}
  .facts .wrap{grid-template-columns:repeat(2,1fr);}
  .g3,.g2{grid-template-columns:1fr;}
  .list-item{flex-direction:column;}
  .list-item .li-thumb{flex:none;}
  .list-item .li-thumb img{width:100%;height:auto;}
  .section{padding:38px 0;}
}
@media (max-width:600px){
  .g4{grid-template-columns:1fr;}
  .ft-grid{grid-template-columns:1fr;}
  .hero h1{font-size:23px;}
  .page-head h1{font-size:23px;}
  .topbar .tb-right span{margin-left:12px;}
}